Stateless video decoding added.

CHANGELOG

@@ -660,6 +660,17 @@ API Changes
   written against it behaves the same here; note that library names its
   sumhexa hexsum.
 
+- The ARM64 build carries the V4L2 stateless decoders:  AV1, H.264,
+  HEVC, MPEG-2, VP8 and VP9.  These reach the hardware on the boards
+  whose kernel drivers use the V4L2 Request API rather than the older
+  memory-to-memory one -- Allwinner's Cedrus, Rockchip's rkvdec and
+  hantro, the Pi 5's rpivid, i.MX8's hantro -- none of which the engine
+  could use before.  Singe tries them first on ARM, then Rockchip's MPP,
+  then stateful V4L2, and decodes in software when a board offers none.
+  Desktop platforms are untouched.  The support is Jonas Karlman's
+  V4L2 Request patchset for FFmpeg, carried in thirdparty/ffmpeg; it
+  brings a runtime dependency on libudev, which these boards all have.
+
 - The Raspberry Pi build target is now linux-aarch64 and its binary is
   Singe-v3.00-Linux-aarch64.  Nothing in it was ever Pi specific:  the
   V4L2 decoder it builds talks to any memory-to-memory device, so the

CMakeLists.txt

@@ -576,6 +576,15 @@ if(KANGAROO_OS STREQUAL "linux")
 		# An ARM board decodes video through its V4L2 memory-to-memory device (videoPlayer.c).
 		# Nothing here is particular to a Raspberry Pi:  any board whose kernel offers one is served.
 		target_compile_definitions(${CMAKE_PROJECT_NAME} PRIVATE SINGE_V4L2_DECODE)
+		# The stateless decoders are a separate interface again, and FFmpeg builds them only when its
+		# own dependencies were met, so the engine follows what FFmpeg actually did.
+		if(EXISTS ${BUILD_DIR}/build/ffmpeg/config.h)
+			file(READ ${BUILD_DIR}/build/ffmpeg/config.h ffmpegConfig)
+			if(ffmpegConfig MATCHES "#define CONFIG_V4L2_REQUEST 1")
+				target_compile_definitions(${CMAKE_PROJECT_NAME} PRIVATE SINGE_V4L2_REQUEST_DECODE)
+				message(STATUS "FFmpeg carries the V4L2 stateless decoders; enabling them in the player")
+			endif()
+		endif()
 	else()
 		# ffmpeg's vdpau hardware context is always compiled in on X11 hosts.
 		set(SYSTEM_LIBS -lX11 -lvdpau -ldl -rdynamic)   # -rdynamic gives the crash backtrace function names

cmake/zig/arm64Packages.cmake

@@ -6,6 +6,8 @@
 
 set(arm64PackagesSnapshot "https://snapshot.debian.org/archive/debian/20250901T000000Z")
 set(arm64Packages
+	# Kernel headers, for the V4L2 stateless decoders:  linux/media.h, videodev2.h, v4l2-controls.h.
+	"${arm64PackagesSnapshot}/pool/main/l/linux/linux-libc-dev_6.1.148-1_arm64.deb|55baaddd21bcaa7fed8894c89e4d65b684e85abcb48acf443519438185e1153f"
 	"${arm64PackagesSnapshot}/pool/main/libd/libdrm/libdrm-dev_2.4.114-1+b1_arm64.deb|26d7d0dcbbda8ed023b57989e0fca7f0ff8372daaf654daf8b3a362557be5e21"
 	"${arm64PackagesSnapshot}/pool/main/libd/libdrm/libdrm2_2.4.114-1+b1_arm64.deb|f5f15a46d02cf5d9fa52d4f1c54b8cf80c398711ad771a9938b12399b8d8090c"
 	"${arm64PackagesSnapshot}/pool/main/libd/libdrm/libdrm-amdgpu1_2.4.114-1+b1_arm64.deb|24692e933b98b2b8b80d87c45728efa2bc7176120ce9efcb8793407e508b5a32"

src/videoPlayer.c

@@ -108,6 +108,12 @@ typedef struct iso639_lang_t iso639_lang_t;
 #define RKMPP_DECODE false
 #endif
 
+#if defined(SINGE_V4L2_REQUEST_DECODE)
+#define V4L2_REQUEST_DECODE true
+#else
+#define V4L2_REQUEST_DECODE false
+#endif
+
 #if defined(SINGE_V4L2_DECODE)
 #define V4L2_DECODE true
 #else
@@ -1198,6 +1204,12 @@ static void _openHardware(VideoPlayerT *v, const AVCodec *decoder) {
 #elif defined(__APPLE__)
 		AV_HWDEVICE_TYPE_VIDEOTOOLBOX,
 #else
+		// Stateless V4L2 comes first on the ARM boards that have it:  Allwinner's Cedrus, Rockchip's
+		// rkvdec and hantro, the Pi 5's rpivid, i.MX8's hantro.  A desktop has no such device and
+		// falls straight through to VAAPI or VDPAU, so the order costs it nothing.
+#if defined(SINGE_V4L2_REQUEST_DECODE)
+		AV_HWDEVICE_TYPE_V4L2REQUEST,
+#endif
 		AV_HWDEVICE_TYPE_VAAPI,
 		AV_HWDEVICE_TYPE_VDPAU,
 #endif
@@ -1718,6 +1730,18 @@ const char *videoGetDecoderDescription(void) {
 		return "software only (--softwarevideo)";
 	}
 	if (V4L2_DECODE) {
+		// An ARM build may carry three:  the stateless V4L2 decoders, Rockchip's own, and the
+		// stateful V4L2 ones.  Which of them a board actually has is a question for the board.
+		if (RKMPP_DECODE && V4L2_REQUEST_DECODE) {
+			return "hardware v4l2 stateless, rkmpp or v4l2m2m where the board allows, software otherwise";
+		}
+		if (V4L2_REQUEST_DECODE) {
+			return "hardware v4l2 stateless or v4l2m2m where the board allows, software otherwise";
+		}
+		if (RKMPP_DECODE) {
+			return "hardware rkmpp or v4l2m2m where the board allows, software otherwise";
+		}
+
 		return "hardware v4l2m2m where the codec allows, software otherwise";
 	}
 #if defined(_WIN32)

thirdparty/ffmpeg/configure

@@ -364,6 +364,7 @@ External library support:
   --disable-nvenc          disable Nvidia video encoding code [autodetect]
   --enable-rkmpp           enable Rockchip Media Process Platform code [no]
   --disable-v4l2-m2m       disable V4L2 mem2mem code [autodetect]
+  --disable-v4l2-request   disable V4L2 Request API code [autodetect]
   --disable-vaapi          disable Video Acceleration API (mainly Unix/Intel) code [autodetect]
   --disable-vdpau          disable Nvidia Video Decode and Presentation API for Unix code [autodetect]
   --disable-videotoolbox   disable VideoToolbox code [autodetect]
@@ -2136,6 +2137,7 @@ EXTERNAL_LIBRARY_LIST="
     libtorch
     libtwolame
     libuavs3d
+    libudev
     libv4l2
     libvmaf
     libvorbis
@@ -2180,6 +2182,7 @@ HWACCEL_AUTODETECT_LIBRARY_LIST="
     videotoolbox
     vulkan
     v4l2_m2m
+    v4l2_request
 "
 
 # catchall list of things that require external libs to link
@@ -2693,6 +2696,7 @@ TYPES_LIST="
     struct_sockaddr_sa_len
     struct_sockaddr_storage
     struct_stat_st_mtim_tv_nsec
+    struct_v4l2_ctrl_hevc_decode_params_num_delta_pocs_of_ref_rps_idx
     struct_v4l2_frmivalenum_discrete
     struct_mfxConfigInterface
 "
@@ -3398,6 +3402,8 @@ dxva2_deps="dxva2api_h DXVA2_ConfigPictureDecode ole32 user32"
 ffnvcodec_deps_any="libdl LoadLibrary"
 mediacodec_deps="android mediandk pthreads"
 nvdec_deps="ffnvcodec"
+v4l2_request_deps="linux_media_h v4l2_timeval_to_ns v4l2_m2m_hold_capture_buf libdrm libudev"
+v4l2_request_suggest="libdrm libudev"
 vaapi_x11_deps="xlib_x11"
 videotoolbox_hwaccel_deps="videotoolbox pthreads"
 videotoolbox_hwaccel_extralibs="-framework QuartzCore"
@@ -3416,6 +3422,8 @@ av1_dxva2_hwaccel_deps="dxva2 DXVA_PicParams_AV1"
 av1_dxva2_hwaccel_select="av1_decoder"
 av1_nvdec_hwaccel_deps="nvdec CUVIDAV1PICPARAMS"
 av1_nvdec_hwaccel_select="av1_decoder"
+av1_v4l2request_hwaccel_deps="v4l2_request av1_v4l2_request"
+av1_v4l2request_hwaccel_select="av1_decoder"
 av1_vaapi_hwaccel_deps="vaapi VADecPictureParameterBufferAV1_bit_depth_idx"
 av1_vaapi_hwaccel_select="av1_decoder"
 av1_vdpau_hwaccel_deps="vdpau VdpPictureInfoAV1"
@@ -3442,6 +3450,8 @@ h264_dxva2_hwaccel_deps="dxva2"
 h264_dxva2_hwaccel_select="h264_decoder"
 h264_nvdec_hwaccel_deps="nvdec"
 h264_nvdec_hwaccel_select="h264_decoder"
+h264_v4l2request_hwaccel_deps="v4l2_request h264_v4l2_request"
+h264_v4l2request_hwaccel_select="h264_decoder"
 h264_vaapi_hwaccel_deps="vaapi"
 h264_vaapi_hwaccel_select="h264_decoder"
 h264_vdpau_hwaccel_deps="vdpau"
@@ -3460,6 +3470,8 @@ hevc_dxva2_hwaccel_deps="dxva2 DXVA_PicParams_HEVC"
 hevc_dxva2_hwaccel_select="hevc_decoder"
 hevc_nvdec_hwaccel_deps="nvdec"
 hevc_nvdec_hwaccel_select="hevc_decoder"
+hevc_v4l2request_hwaccel_deps="v4l2_request hevc_v4l2_request"
+hevc_v4l2request_hwaccel_select="hevc_decoder"
 hevc_vaapi_hwaccel_deps="vaapi VAPictureParameterBufferHEVC"
 hevc_vaapi_hwaccel_select="hevc_decoder"
 hevc_vdpau_hwaccel_deps="vdpau VdpPictureInfoHEVC"
@@ -3488,6 +3500,8 @@ mpeg2_dxva2_hwaccel_deps="dxva2"
 mpeg2_dxva2_hwaccel_select="mpeg2video_decoder"
 mpeg2_nvdec_hwaccel_deps="nvdec"
 mpeg2_nvdec_hwaccel_select="mpeg2video_decoder"
+mpeg2_v4l2request_hwaccel_deps="v4l2_request mpeg2_v4l2_request"
+mpeg2_v4l2request_hwaccel_select="mpeg2video_decoder"
 mpeg2_vaapi_hwaccel_deps="vaapi"
 mpeg2_vaapi_hwaccel_select="mpeg2video_decoder"
 mpeg2_vdpau_hwaccel_deps="vdpau"
@@ -3526,6 +3540,8 @@ vc1_vdpau_hwaccel_deps="vdpau"
 vc1_vdpau_hwaccel_select="vc1_decoder"
 vp8_nvdec_hwaccel_deps="nvdec"
 vp8_nvdec_hwaccel_select="vp8_decoder"
+vp8_v4l2request_hwaccel_deps="v4l2_request vp8_v4l2_request"
+vp8_v4l2request_hwaccel_select="vp8_decoder"
 vp8_vaapi_hwaccel_deps="vaapi"
 vp8_vaapi_hwaccel_select="vp8_decoder"
 vp9_d3d11va_hwaccel_deps="d3d11va DXVA_PicParams_VP9"
@@ -3538,6 +3554,8 @@ vp9_dxva2_hwaccel_deps="dxva2 DXVA_PicParams_VP9"
 vp9_dxva2_hwaccel_select="vp9_decoder"
 vp9_nvdec_hwaccel_deps="nvdec"
 vp9_nvdec_hwaccel_select="vp9_decoder"
+vp9_v4l2request_hwaccel_deps="v4l2_request vp9_v4l2_request"
+vp9_v4l2request_hwaccel_select="vp9_decoder"
 vp9_vaapi_hwaccel_deps="vaapi VADecPictureParameterBufferVP9_bit_depth"
 vp9_vaapi_hwaccel_select="vp9_decoder"
 vp9_vdpau_hwaccel_deps="vdpau VdpPictureInfoVP9"
@@ -4371,7 +4389,7 @@ shader_compression_suggest="zlib"
 
 avcodec_extralibs="pthreads_extralibs iconv_extralibs dxva2_extralibs liblcevc_dec_extralibs lcms2_extralibs"
 avfilter_extralibs="pthreads_extralibs"
-avutil_extralibs="d3d11va_extralibs d3d12va_extralibs mediacodec_extralibs nanosleep_extralibs pthreads_extralibs vaapi_drm_extralibs vaapi_x11_extralibs vaapi_win32_extralibs vdpau_x11_extralibs"
+avutil_extralibs="d3d11va_extralibs d3d12va_extralibs mediacodec_extralibs nanosleep_extralibs pthreads_extralibs v4l2_request_extralibs vaapi_drm_extralibs vaapi_x11_extralibs vaapi_win32_extralibs vdpau_x11_extralibs"
 
 # programs
 ffmpeg_deps="avcodec avfilter avformat threads"
@@ -7651,6 +7669,20 @@ if enabled v4l2_m2m; then
     check_cc vp9_v4l2_m2m linux/videodev2.h "int i = V4L2_PIX_FMT_VP9;"
 fi
 
+if enabled v4l2_request; then
+    check_cc av1_v4l2_request linux/videodev2.h "int i = V4L2_CID_STATELESS_AV1_SEQUENCE"
+    check_cc h264_v4l2_request linux/videodev2.h "int i = V4L2_CID_STATELESS_H264_DECODE_MODE"
+    check_cc hevc_v4l2_request linux/videodev2.h "int i = V4L2_CID_STATELESS_HEVC_SPS"
+    check_cc mpeg2_v4l2_request linux/videodev2.h "int i = V4L2_CID_STATELESS_MPEG2_SEQUENCE"
+    check_cc v4l2_m2m_hold_capture_buf linux/videodev2.h "int i = V4L2_BUF_FLAG_M2M_HOLD_CAPTURE_BUF"
+    check_cc vp8_v4l2_request linux/videodev2.h "int i = V4L2_CID_STATELESS_VP8_FRAME"
+    check_cc vp9_v4l2_request linux/videodev2.h "int i = V4L2_CID_STATELESS_VP9_FRAME"
+    check_func_headers "linux/media.h linux/videodev2.h" v4l2_timeval_to_ns
+    check_pkg_config libudev libudev libudev.h udev_new
+    check_struct linux/videodev2.h "struct v4l2_ctrl_hevc_decode_params" num_delta_pocs_of_ref_rps_idx
+    v4l2_request_extralibs="$libudev_extralibs"
+fi
+
 check_headers sys/videoio.h
 test_code cc sys/videoio.h "struct v4l2_frmsizeenum vfse; vfse.discrete.width = 0;" && enable_sanitized struct_v4l2_frmivalenum_discrete
 

thirdparty/ffmpeg/libavcodec/Makefile

@@ -185,6 +185,7 @@ OBJS-$(CONFIG_VIDEODSP)                += videodsp.o
 OBJS-$(CONFIG_VP3DSP)                  += vp3dsp.o
 OBJS-$(CONFIG_VP8DSP)                  += vp8dsp.o
 OBJS-$(CONFIG_V4L2_M2M)                += v4l2_m2m.o v4l2_context.o v4l2_buffers.o v4l2_fmt.o
+OBJS-$(CONFIG_V4L2_REQUEST)            += v4l2_request.o
 OBJS-$(CONFIG_WMA_FREQS)               += wma_freqs.o
 OBJS-$(CONFIG_WMV2DSP)                 += wmv2dsp.o
 
@@ -1048,6 +1049,7 @@ OBJS-$(CONFIG_AV1_D3D11VA_HWACCEL)        += dxva2_av1.o
 OBJS-$(CONFIG_AV1_DXVA2_HWACCEL)          += dxva2_av1.o
 OBJS-$(CONFIG_AV1_D3D12VA_HWACCEL)        += dxva2_av1.o d3d12va_av1.o
 OBJS-$(CONFIG_AV1_NVDEC_HWACCEL)          += nvdec_av1.o
+OBJS-$(CONFIG_AV1_V4L2REQUEST_HWACCEL)    += v4l2_request_av1.o
 OBJS-$(CONFIG_AV1_VAAPI_HWACCEL)          += vaapi_av1.o
 OBJS-$(CONFIG_AV1_VDPAU_HWACCEL)          += vdpau_av1.o
 OBJS-$(CONFIG_AV1_VIDEOTOOLBOX_HWACCEL)   += videotoolbox_av1.o
@@ -1061,6 +1063,7 @@ OBJS-$(CONFIG_H264_DXVA2_HWACCEL)         += dxva2_h264.o
 OBJS-$(CONFIG_H264_D3D12VA_HWACCEL)       += dxva2_h264.o d3d12va_h264.o
 OBJS-$(CONFIG_H264_NVDEC_HWACCEL)         += nvdec_h264.o
 OBJS-$(CONFIG_H264_QSV_HWACCEL)           += qsvdec.o
+OBJS-$(CONFIG_H264_V4L2REQUEST_HWACCEL)   += v4l2_request_h264.o
 OBJS-$(CONFIG_H264_VAAPI_HWACCEL)         += vaapi_h264.o
 OBJS-$(CONFIG_H264_VDPAU_HWACCEL)         += vdpau_h264.o
 OBJS-$(CONFIG_H264_VIDEOTOOLBOX_HWACCEL)  += videotoolbox.o
@@ -1070,6 +1073,7 @@ OBJS-$(CONFIG_HEVC_DXVA2_HWACCEL)         += dxva2_hevc.o
 OBJS-$(CONFIG_HEVC_D3D12VA_HWACCEL)       += dxva2_hevc.o d3d12va_hevc.o
 OBJS-$(CONFIG_HEVC_NVDEC_HWACCEL)         += nvdec_hevc.o
 OBJS-$(CONFIG_HEVC_QSV_HWACCEL)           += qsvdec.o
+OBJS-$(CONFIG_HEVC_V4L2REQUEST_HWACCEL)   += v4l2_request_hevc.o
 OBJS-$(CONFIG_HEVC_VAAPI_HWACCEL)         += vaapi_hevc.o h265_profile_level.o
 OBJS-$(CONFIG_HEVC_VDPAU_HWACCEL)         += vdpau_hevc.o h265_profile_level.o
 OBJS-$(CONFIG_HEVC_VULKAN_HWACCEL)        += vulkan_decode.o vulkan_hevc.o
@@ -1083,6 +1087,7 @@ OBJS-$(CONFIG_MPEG2_DXVA2_HWACCEL)        += dxva2_mpeg2.o
 OBJS-$(CONFIG_MPEG2_D3D12VA_HWACCEL)      += dxva2_mpeg2.o d3d12va_mpeg2.o
 OBJS-$(CONFIG_MPEG2_NVDEC_HWACCEL)        += nvdec_mpeg12.o
 OBJS-$(CONFIG_MPEG2_QSV_HWACCEL)          += qsvdec.o
+OBJS-$(CONFIG_MPEG2_V4L2REQUEST_HWACCEL)  += v4l2_request_mpeg2.o
 OBJS-$(CONFIG_MPEG2_VAAPI_HWACCEL)        += vaapi_mpeg2.o
 OBJS-$(CONFIG_MPEG2_VDPAU_HWACCEL)        += vdpau_mpeg12.o
 OBJS-$(CONFIG_MPEG2_VIDEOTOOLBOX_HWACCEL) += videotoolbox.o
@@ -1098,11 +1103,13 @@ OBJS-$(CONFIG_VC1_QSV_HWACCEL)            += qsvdec.o
 OBJS-$(CONFIG_VC1_VAAPI_HWACCEL)          += vaapi_vc1.o
 OBJS-$(CONFIG_VC1_VDPAU_HWACCEL)          += vdpau_vc1.o
 OBJS-$(CONFIG_VP8_NVDEC_HWACCEL)          += nvdec_vp8.o
+OBJS-$(CONFIG_VP8_V4L2REQUEST_HWACCEL)    += v4l2_request_vp8.o
 OBJS-$(CONFIG_VP8_VAAPI_HWACCEL)          += vaapi_vp8.o
 OBJS-$(CONFIG_VP9_D3D11VA_HWACCEL)        += dxva2_vp9.o
 OBJS-$(CONFIG_VP9_DXVA2_HWACCEL)          += dxva2_vp9.o
 OBJS-$(CONFIG_VP9_D3D12VA_HWACCEL)        += dxva2_vp9.o d3d12va_vp9.o
 OBJS-$(CONFIG_VP9_NVDEC_HWACCEL)          += nvdec_vp9.o
+OBJS-$(CONFIG_VP9_V4L2REQUEST_HWACCEL)    += v4l2_request_vp9.o
 OBJS-$(CONFIG_VP9_VAAPI_HWACCEL)          += vaapi_vp9.o
 OBJS-$(CONFIG_VP9_VDPAU_HWACCEL)          += vdpau_vp9.o
 OBJS-$(CONFIG_VP9_VIDEOTOOLBOX_HWACCEL)   += videotoolbox_vp9.o
@@ -1357,6 +1364,7 @@ SKIPHEADERS-$(CONFIG_VIDEOTOOLBOX)     += videotoolbox.h vt_internal.h
 SKIPHEADERS-$(CONFIG_VULKAN)           += ffv1_vulkan.h prores_vulkan.h vulkan_video.h \
                                           vulkan_encode.h vulkan_decode.h
 SKIPHEADERS-$(CONFIG_V4L2_M2M)         += v4l2_buffers.h v4l2_context.h v4l2_m2m.h
+SKIPHEADERS-$(CONFIG_V4L2_REQUEST)     += v4l2_request.h
 SKIPHEADERS-$(CONFIG_ZLIB)             += zlib_wrapper.h
 
 TESTPROGS = avcodec                                                     \

thirdparty/ffmpeg/libavcodec/av1dec.c

@@ -543,6 +543,7 @@ static int get_pixel_format(AVCodecContext *avctx)
                      CONFIG_AV1_D3D11VA_HWACCEL * 2 + \
                      CONFIG_AV1_D3D12VA_HWACCEL + \
                      CONFIG_AV1_NVDEC_HWACCEL + \
+                     CONFIG_AV1_V4L2REQUEST_HWACCEL + \
                      CONFIG_AV1_VAAPI_HWACCEL + \
                      CONFIG_AV1_VDPAU_HWACCEL + \
                      CONFIG_AV1_VIDEOTOOLBOX_HWACCEL + \
@@ -578,6 +579,9 @@ static int get_pixel_format(AVCodecContext *avctx)
 #endif
 #if CONFIG_AV1_VULKAN_HWACCEL
         *fmtp++ = AV_PIX_FMT_VULKAN;
+#endif
+#if CONFIG_AV1_V4L2REQUEST_HWACCEL
+        *fmtp++ = AV_PIX_FMT_DRM_PRIME;
 #endif
         break;
     case AV_PIX_FMT_YUV420P10:
@@ -605,6 +609,9 @@ static int get_pixel_format(AVCodecContext *avctx)
 #endif
 #if CONFIG_AV1_VULKAN_HWACCEL
         *fmtp++ = AV_PIX_FMT_VULKAN;
+#endif
+#if CONFIG_AV1_V4L2REQUEST_HWACCEL
+        *fmtp++ = AV_PIX_FMT_DRM_PRIME;
 #endif
         break;
     case AV_PIX_FMT_YUV420P12:
@@ -1567,6 +1574,9 @@ const FFCodec ff_av1_decoder = {
 #if CONFIG_AV1_VULKAN_HWACCEL
         HWACCEL_VULKAN(av1),
 #endif
+#if CONFIG_AV1_V4L2REQUEST_HWACCEL
+        HWACCEL_V4L2REQUEST(av1),
+#endif
 
         NULL
     },

thirdparty/ffmpeg/libavcodec/h264_slice.c

@@ -790,6 +790,7 @@ static enum AVPixelFormat get_pixel_format(H264Context *h, int force_callback)
                      (CONFIG_H264_D3D11VA_HWACCEL * 2) + \
                      CONFIG_H264_D3D12VA_HWACCEL + \
                      CONFIG_H264_NVDEC_HWACCEL + \
+                     CONFIG_H264_V4L2REQUEST_HWACCEL + \
                      CONFIG_H264_VAAPI_HWACCEL + \
                      CONFIG_H264_VIDEOTOOLBOX_HWACCEL + \
                      CONFIG_H264_VDPAU_HWACCEL + \
@@ -818,6 +819,9 @@ static enum AVPixelFormat get_pixel_format(H264Context *h, int force_callback)
 #endif
 #if CONFIG_H264_NVDEC_HWACCEL
         *fmt++ = AV_PIX_FMT_CUDA;
+#endif
+#if CONFIG_H264_V4L2REQUEST_HWACCEL
+        *fmt++ = AV_PIX_FMT_DRM_PRIME;
 #endif
         if (CHROMA444(h)) {
             if (h->avctx->colorspace == AVCOL_SPC_RGB) {
@@ -874,6 +878,9 @@ static enum AVPixelFormat get_pixel_format(H264Context *h, int force_callback)
 #if CONFIG_H264_VIDEOTOOLBOX_HWACCEL
         if (h->avctx->colorspace != AVCOL_SPC_RGB)
             *fmt++ = AV_PIX_FMT_VIDEOTOOLBOX;
+#endif
+#if CONFIG_H264_V4L2REQUEST_HWACCEL
+        *fmt++ = AV_PIX_FMT_DRM_PRIME;
 #endif
         if (CHROMA444(h)) {
             if (h->avctx->colorspace == AVCOL_SPC_RGB)
@@ -1702,7 +1709,7 @@ static int h264_slice_header_parse(const H264Context *h, H264SliceContext *sl,
     unsigned int slice_type, tmp, i;
     int field_pic_flag, bottom_field_flag;
     int first_slice = sl == h->slice_ctx && !h->current_slice;
-    int picture_structure;
+    int picture_structure, pos;
 
     if (first_slice)
         av_assert0(!h->setup_finished);
@@ -1793,6 +1800,7 @@ static int h264_slice_header_parse(const H264Context *h, H264SliceContext *sl,
 
     sl->poc_lsb = 0;
     sl->delta_poc_bottom = 0;
+    pos = get_bits_left(&sl->gb);
     if (sps->poc_type == 0) {
         sl->poc_lsb = get_bits(&sl->gb, sps->log2_max_poc_lsb);
 
@@ -1807,6 +1815,7 @@ static int h264_slice_header_parse(const H264Context *h, H264SliceContext *sl,
         if (pps->pic_order_present == 1 && picture_structure == PICT_FRAME)
             sl->delta_poc[1] = get_se_golomb(&sl->gb);
     }
+    sl->pic_order_cnt_bit_size = pos - get_bits_left(&sl->gb);
 
     sl->redundant_pic_count = 0;
     if (pps->redundant_pic_cnt_present)
@@ -1846,9 +1855,11 @@ static int h264_slice_header_parse(const H264Context *h, H264SliceContext *sl,
 
     sl->explicit_ref_marking = 0;
     if (nal->ref_idc) {
+        pos = get_bits_left(&sl->gb);
         ret = ff_h264_decode_ref_pic_marking(sl, &sl->gb, nal, h->avctx);
         if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
             return AVERROR_INVALIDDATA;
+        sl->ref_pic_marking_bit_size = pos - get_bits_left(&sl->gb);
     }
 
     if (sl->slice_type_nos != AV_PICTURE_TYPE_I && pps->cabac) {

thirdparty/ffmpeg/libavcodec/h264dec.c

@@ -1145,6 +1145,9 @@ const FFCodec ff_h264_decoder = {
 #endif
 #if CONFIG_H264_VULKAN_HWACCEL
                                HWACCEL_VULKAN(h264),
+#endif
+#if CONFIG_H264_V4L2REQUEST_HWACCEL
+                               HWACCEL_V4L2REQUEST(h264),
 #endif
                                NULL
                            },

thirdparty/ffmpeg/libavcodec/h264dec.h

@@ -322,6 +322,7 @@ typedef struct H264SliceContext {
     MMCO mmco[H264_MAX_MMCO_COUNT];
     int  nb_mmco;
     int explicit_ref_marking;
+    int ref_pic_marking_bit_size;
 
     int frame_num;
     int idr_pic_id;
@@ -330,6 +331,7 @@ typedef struct H264SliceContext {
     int delta_poc[2];
     int curr_pic_num;
     int max_pic_num;
+    int pic_order_cnt_bit_size;
 } H264SliceContext;
 
 /**

thirdparty/ffmpeg/libavcodec/hevc/hevcdec.c

@@ -566,6 +566,7 @@ static enum AVPixelFormat get_format(HEVCContext *s, const HEVCSPS *sps)
                      CONFIG_HEVC_D3D11VA_HWACCEL * 2 + \
                      CONFIG_HEVC_D3D12VA_HWACCEL + \
                      CONFIG_HEVC_NVDEC_HWACCEL + \
+                     CONFIG_HEVC_V4L2REQUEST_HWACCEL + \
                      CONFIG_HEVC_VAAPI_HWACCEL + \
                      CONFIG_HEVC_VIDEOTOOLBOX_HWACCEL + \
                      CONFIG_HEVC_VDPAU_HWACCEL + \
@@ -604,6 +605,9 @@ static enum AVPixelFormat get_format(HEVCContext *s, const HEVCSPS *sps)
 #endif
 #if CONFIG_HEVC_VULKAN_HWACCEL
         *fmt++ = AV_PIX_FMT_VULKAN;
+#endif
+#if CONFIG_HEVC_V4L2REQUEST_HWACCEL
+        *fmt++ = AV_PIX_FMT_DRM_PRIME;
 #endif
         break;
     case AV_PIX_FMT_YUV420P10:
@@ -631,6 +635,9 @@ static enum AVPixelFormat get_format(HEVCContext *s, const HEVCSPS *sps)
 #endif
 #if CONFIG_HEVC_NVDEC_HWACCEL
         *fmt++ = AV_PIX_FMT_CUDA;
+#endif
+#if CONFIG_HEVC_V4L2REQUEST_HWACCEL
+        *fmt++ = AV_PIX_FMT_DRM_PRIME;
 #endif
         break;
     case AV_PIX_FMT_YUV444P:
@@ -4273,6 +4280,9 @@ const FFCodec ff_hevc_decoder = {
 #endif
 #if CONFIG_HEVC_VULKAN_HWACCEL
                                HWACCEL_VULKAN(hevc),
+#endif
+#if CONFIG_HEVC_V4L2REQUEST_HWACCEL
+                               HWACCEL_V4L2REQUEST(hevc),
 #endif
                                NULL
                            },

thirdparty/ffmpeg/libavcodec/hwaccels.h

@@ -25,6 +25,7 @@ extern const struct FFHWAccel ff_av1_d3d11va2_hwaccel;
 extern const struct FFHWAccel ff_av1_d3d12va_hwaccel;
 extern const struct FFHWAccel ff_av1_dxva2_hwaccel;
 extern const struct FFHWAccel ff_av1_nvdec_hwaccel;
+extern const struct FFHWAccel ff_av1_v4l2request_hwaccel;
 extern const struct FFHWAccel ff_av1_vaapi_hwaccel;
 extern const struct FFHWAccel ff_av1_vdpau_hwaccel;
 extern const struct FFHWAccel ff_av1_videotoolbox_hwaccel;
@@ -38,6 +39,7 @@ extern const struct FFHWAccel ff_h264_d3d11va2_hwaccel;
 extern const struct FFHWAccel ff_h264_d3d12va_hwaccel;
 extern const struct FFHWAccel ff_h264_dxva2_hwaccel;
 extern const struct FFHWAccel ff_h264_nvdec_hwaccel;
+extern const struct FFHWAccel ff_h264_v4l2request_hwaccel;
 extern const struct FFHWAccel ff_h264_vaapi_hwaccel;
 extern const struct FFHWAccel ff_h264_vdpau_hwaccel;
 extern const struct FFHWAccel ff_h264_videotoolbox_hwaccel;
@@ -47,6 +49,7 @@ extern const struct FFHWAccel ff_hevc_d3d11va2_hwaccel;
 extern const struct FFHWAccel ff_hevc_d3d12va_hwaccel;
 extern const struct FFHWAccel ff_hevc_dxva2_hwaccel;
 extern const struct FFHWAccel ff_hevc_nvdec_hwaccel;
+extern const struct FFHWAccel ff_hevc_v4l2request_hwaccel;
 extern const struct FFHWAccel ff_hevc_vaapi_hwaccel;
 extern const struct FFHWAccel ff_hevc_vdpau_hwaccel;
 extern const struct FFHWAccel ff_hevc_videotoolbox_hwaccel;
@@ -61,6 +64,7 @@ extern const struct FFHWAccel ff_mpeg2_d3d11va2_hwaccel;
 extern const struct FFHWAccel ff_mpeg2_d3d12va_hwaccel;
 extern const struct FFHWAccel ff_mpeg2_dxva2_hwaccel;
 extern const struct FFHWAccel ff_mpeg2_nvdec_hwaccel;
+extern const struct FFHWAccel ff_mpeg2_v4l2request_hwaccel;
 extern const struct FFHWAccel ff_mpeg2_vaapi_hwaccel;
 extern const struct FFHWAccel ff_mpeg2_vdpau_hwaccel;
 extern const struct FFHWAccel ff_mpeg2_videotoolbox_hwaccel;
@@ -80,12 +84,14 @@ extern const struct FFHWAccel ff_vc1_nvdec_hwaccel;
 extern const struct FFHWAccel ff_vc1_vaapi_hwaccel;
 extern const struct FFHWAccel ff_vc1_vdpau_hwaccel;
 extern const struct FFHWAccel ff_vp8_nvdec_hwaccel;
+extern const struct FFHWAccel ff_vp8_v4l2request_hwaccel;
 extern const struct FFHWAccel ff_vp8_vaapi_hwaccel;
 extern const struct FFHWAccel ff_vp9_d3d11va_hwaccel;
 extern const struct FFHWAccel ff_vp9_d3d11va2_hwaccel;
 extern const struct FFHWAccel ff_vp9_d3d12va_hwaccel;
 extern const struct FFHWAccel ff_vp9_dxva2_hwaccel;
 extern const struct FFHWAccel ff_vp9_nvdec_hwaccel;
+extern const struct FFHWAccel ff_vp9_v4l2request_hwaccel;
 extern const struct FFHWAccel ff_vp9_vaapi_hwaccel;
 extern const struct FFHWAccel ff_vp9_vdpau_hwaccel;
 extern const struct FFHWAccel ff_vp9_videotoolbox_hwaccel;

thirdparty/ffmpeg/libavcodec/hwaccels.h.orig

@@ -0,0 +1,102 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVCODEC_HWACCELS_H
+#define AVCODEC_HWACCELS_H
+
+extern const struct FFHWAccel ff_apv_vulkan_hwaccel;
+extern const struct FFHWAccel ff_av1_d3d11va_hwaccel;
+extern const struct FFHWAccel ff_av1_d3d11va2_hwaccel;
+extern const struct FFHWAccel ff_av1_d3d12va_hwaccel;
+extern const struct FFHWAccel ff_av1_dxva2_hwaccel;
+extern const struct FFHWAccel ff_av1_nvdec_hwaccel;
+extern const struct FFHWAccel ff_av1_vaapi_hwaccel;
+extern const struct FFHWAccel ff_av1_vdpau_hwaccel;
+extern const struct FFHWAccel ff_av1_videotoolbox_hwaccel;
+extern const struct FFHWAccel ff_av1_vulkan_hwaccel;
+extern const struct FFHWAccel ff_dpx_vulkan_hwaccel;
+extern const struct FFHWAccel ff_ffv1_vulkan_hwaccel;
+extern const struct FFHWAccel ff_h263_vaapi_hwaccel;
+extern const struct FFHWAccel ff_h263_videotoolbox_hwaccel;
+extern const struct FFHWAccel ff_h264_d3d11va_hwaccel;
+extern const struct FFHWAccel ff_h264_d3d11va2_hwaccel;
+extern const struct FFHWAccel ff_h264_d3d12va_hwaccel;
+extern const struct FFHWAccel ff_h264_dxva2_hwaccel;
+extern const struct FFHWAccel ff_h264_nvdec_hwaccel;
+extern const struct FFHWAccel ff_h264_vaapi_hwaccel;
+extern const struct FFHWAccel ff_h264_vdpau_hwaccel;
+extern const struct FFHWAccel ff_h264_videotoolbox_hwaccel;
+extern const struct FFHWAccel ff_h264_vulkan_hwaccel;
+extern const struct FFHWAccel ff_hevc_d3d11va_hwaccel;
+extern const struct FFHWAccel ff_hevc_d3d11va2_hwaccel;
+extern const struct FFHWAccel ff_hevc_d3d12va_hwaccel;
+extern const struct FFHWAccel ff_hevc_dxva2_hwaccel;
+extern const struct FFHWAccel ff_hevc_nvdec_hwaccel;
+extern const struct FFHWAccel ff_hevc_vaapi_hwaccel;
+extern const struct FFHWAccel ff_hevc_vdpau_hwaccel;
+extern const struct FFHWAccel ff_hevc_videotoolbox_hwaccel;
+extern const struct FFHWAccel ff_hevc_vulkan_hwaccel;
+extern const struct FFHWAccel ff_mjpeg_nvdec_hwaccel;
+extern const struct FFHWAccel ff_mjpeg_vaapi_hwaccel;
+extern const struct FFHWAccel ff_mpeg1_nvdec_hwaccel;
+extern const struct FFHWAccel ff_mpeg1_vdpau_hwaccel;
+extern const struct FFHWAccel ff_mpeg1_videotoolbox_hwaccel;
+extern const struct FFHWAccel ff_mpeg2_d3d11va_hwaccel;
+extern const struct FFHWAccel ff_mpeg2_d3d11va2_hwaccel;
+extern const struct FFHWAccel ff_mpeg2_d3d12va_hwaccel;
+extern const struct FFHWAccel ff_mpeg2_dxva2_hwaccel;
+extern const struct FFHWAccel ff_mpeg2_nvdec_hwaccel;
+extern const struct FFHWAccel ff_mpeg2_vaapi_hwaccel;
+extern const struct FFHWAccel ff_mpeg2_vdpau_hwaccel;
+extern const struct FFHWAccel ff_mpeg2_videotoolbox_hwaccel;
+extern const struct FFHWAccel ff_mpeg4_nvdec_hwaccel;
+extern const struct FFHWAccel ff_mpeg4_vaapi_hwaccel;
+extern const struct FFHWAccel ff_mpeg4_vdpau_hwaccel;
+extern const struct FFHWAccel ff_mpeg4_videotoolbox_hwaccel;
+extern const struct FFHWAccel ff_prores_videotoolbox_hwaccel;
+extern const struct FFHWAccel ff_prores_vulkan_hwaccel;
+extern const struct FFHWAccel ff_prores_raw_videotoolbox_hwaccel;
+extern const struct FFHWAccel ff_prores_raw_vulkan_hwaccel;
+extern const struct FFHWAccel ff_vc1_d3d11va_hwaccel;
+extern const struct FFHWAccel ff_vc1_d3d11va2_hwaccel;
+extern const struct FFHWAccel ff_vc1_d3d12va_hwaccel;
+extern const struct FFHWAccel ff_vc1_dxva2_hwaccel;
+extern const struct FFHWAccel ff_vc1_nvdec_hwaccel;
+extern const struct FFHWAccel ff_vc1_vaapi_hwaccel;
+extern const struct FFHWAccel ff_vc1_vdpau_hwaccel;
+extern const struct FFHWAccel ff_vp8_nvdec_hwaccel;
+extern const struct FFHWAccel ff_vp8_vaapi_hwaccel;
+extern const struct FFHWAccel ff_vp9_d3d11va_hwaccel;
+extern const struct FFHWAccel ff_vp9_d3d11va2_hwaccel;
+extern const struct FFHWAccel ff_vp9_d3d12va_hwaccel;
+extern const struct FFHWAccel ff_vp9_dxva2_hwaccel;
+extern const struct FFHWAccel ff_vp9_nvdec_hwaccel;
+extern const struct FFHWAccel ff_vp9_vaapi_hwaccel;
+extern const struct FFHWAccel ff_vp9_vdpau_hwaccel;
+extern const struct FFHWAccel ff_vp9_videotoolbox_hwaccel;
+extern const struct FFHWAccel ff_vp9_vulkan_hwaccel;
+extern const struct FFHWAccel ff_vvc_vaapi_hwaccel;
+extern const struct FFHWAccel ff_wmv3_d3d11va_hwaccel;
+extern const struct FFHWAccel ff_wmv3_d3d11va2_hwaccel;
+extern const struct FFHWAccel ff_wmv3_d3d12va_hwaccel;
+extern const struct FFHWAccel ff_wmv3_dxva2_hwaccel;
+extern const struct FFHWAccel ff_wmv3_nvdec_hwaccel;
+extern const struct FFHWAccel ff_wmv3_vaapi_hwaccel;
+extern const struct FFHWAccel ff_wmv3_vdpau_hwaccel;
+
+#endif /* AVCODEC_HWACCELS_H */

thirdparty/ffmpeg/libavcodec/hwconfig.h

@@ -79,6 +79,8 @@ void ff_hwaccel_uninit(AVCodecContext *avctx);
     HW_CONFIG_HWACCEL(0, 0, 1, D3D11VA_VLD,  NONE,         ff_ ## codec ## _d3d11va_hwaccel)
 #define HWACCEL_D3D12VA(codec) \
     HW_CONFIG_HWACCEL(1, 1, 0, D3D12,        D3D12VA,      ff_ ## codec ## _d3d12va_hwaccel)
+#define HWACCEL_V4L2REQUEST(codec) \
+    HW_CONFIG_HWACCEL(1, 0, 0, DRM_PRIME,    V4L2REQUEST,  ff_ ## codec ## _v4l2request_hwaccel)
 
 #define HW_CONFIG_ENCODER(device, frames, ad_hoc, format, device_type_) \
     &(const AVCodecHWConfigInternal) { \

thirdparty/ffmpeg/libavcodec/mpeg12dec.c

@@ -820,6 +820,9 @@ static const enum AVPixelFormat mpeg2_hwaccel_pixfmt_list_420[] = {
 #endif
 #if CONFIG_MPEG2_VIDEOTOOLBOX_HWACCEL
     AV_PIX_FMT_VIDEOTOOLBOX,
+#endif
+#if CONFIG_MPEG2_V4L2REQUEST_HWACCEL
+    AV_PIX_FMT_DRM_PRIME,
 #endif
     AV_PIX_FMT_YUV420P,
     AV_PIX_FMT_NONE
@@ -2727,6 +2730,9 @@ const FFCodec ff_mpeg2video_decoder = {
 #endif
 #if CONFIG_MPEG2_VIDEOTOOLBOX_HWACCEL
                         HWACCEL_VIDEOTOOLBOX(mpeg2),
+#endif
+#if CONFIG_MPEG2_V4L2REQUEST_HWACCEL
+                        HWACCEL_V4L2REQUEST(mpeg2),
 #endif
                         NULL
                     },

thirdparty/ffmpeg/libavcodec/v4l2_request.c

@@ -0,0 +1,784 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "config.h"
+
+#include <linux/media.h>
+#include <poll.h>
+#include <sys/ioctl.h>
+#include <sys/mman.h>
+#include <unistd.h>
+
+#include "libavutil/hwcontext_v4l2request_internal.h"
+#include "libavutil/mem.h"
+#include "decode.h"
+#include "internal.h"
+#include "v4l2_request.h"
+
+#define V4L2_PLANES_MAX 2
+
+static const AVClass v4l2_request_context_class = {
+    .class_name = "V4L2RequestContext",
+    .item_name  = av_default_item_name,
+    .version    = LIBAVUTIL_VERSION_INT,
+};
+
+static inline V4L2RequestContext *v4l2_request_context(AVCodecContext *avctx)
+{
+    return (V4L2RequestContext *)avctx->internal->hwaccel_priv_data;
+}
+
+static inline uint32_t v4l2_request_frameindex(AVFrame *frame)
+{
+    return (uint32_t)(uintptr_t)frame->data[1];
+}
+
+uint64_t ff_v4l2_request_get_capture_timestamp(AVFrame *frame)
+{
+    /*
+     * The CAPTURE buffer index is used as a base for V4L2 frame reference.
+     * This works because frames are decoded into a CAPTURE buffer that is
+     * closely tied to an AVFrame.
+     */
+    struct timeval timestamp = {
+        .tv_sec = 0,
+        .tv_usec = v4l2_request_frameindex(frame) + 1,
+    };
+    return v4l2_timeval_to_ns(&timestamp);
+}
+
+int ff_v4l2_request_query_control(AVCodecContext *avctx,
+                                  struct v4l2_query_ext_ctrl *control)
+{
+    V4L2RequestContext *ctx = v4l2_request_context(avctx);
+
+    if (ioctl(ctx->fctxi->video_fd, VIDIOC_QUERY_EXT_CTRL, control) < 0) {
+        int ret = AVERROR(errno);
+        // Skip error logging when driver does not support control id (EINVAL)
+        if (errno != EINVAL)
+            av_log(ctx, AV_LOG_ERROR, "Failed to query control %u: %s (%d)\n",
+                   control->id, strerror(errno), errno);
+        return ret;
+    }
+
+    return 0;
+}
+
+int ff_v4l2_request_query_control_default_value(AVCodecContext *avctx,
+                                                uint32_t id)
+{
+    struct v4l2_query_ext_ctrl control = {
+        .id = id,
+    };
+    int ret;
+
+    ret = ff_v4l2_request_query_control(avctx, &control);
+    if (ret < 0)
+        return ret;
+
+    return control.default_value;
+}
+
+static int v4l2_request_set_controls(V4L2RequestContext *ctx, int request_fd,
+                                     struct v4l2_ext_control *control, int count)
+{
+    struct v4l2_ext_controls controls = {
+        .controls = control,
+        .count = count,
+        .request_fd = request_fd,
+        .which = (request_fd >= 0) ? V4L2_CTRL_WHICH_REQUEST_VAL : 0,
+    };
+
+    if (!control || !count)
+        return 0;
+
+    if (ioctl(ctx->fctxi->video_fd, VIDIOC_S_EXT_CTRLS, &controls) < 0)
+        return AVERROR(errno);
+
+    return 0;
+}
+
+int ff_v4l2_request_set_controls(AVCodecContext *avctx,
+                                 struct v4l2_ext_control *control, int count)
+{
+    V4L2RequestContext *ctx = v4l2_request_context(avctx);
+    int ret;
+
+    ret = v4l2_request_set_controls(ctx, -1, control, count);
+    if (ret < 0)
+        av_log(ctx, AV_LOG_ERROR, "Failed to set %d control(s): %s (%d)\n",
+               count, strerror(errno), errno);
+
+    return ret;
+}
+
+static int v4l2_request_queue_buffer(V4L2RequestContext *ctx,
+                                     struct v4l2_buffer *buffer)
+{
+    struct v4l2_plane planes[V4L2_PLANES_MAX] = {};
+
+    if (V4L2_TYPE_IS_MULTIPLANAR(buffer->type)) {
+        planes[0].bytesused = buffer->bytesused;
+        buffer->bytesused = 0;
+        buffer->length = FF_ARRAY_ELEMS(planes);
+        buffer->m.planes = planes;
+    }
+
+    // Queue the buffer
+    if (ioctl(ctx->fctxi->video_fd, VIDIOC_QBUF, buffer) < 0)
+        return AVERROR(errno);
+
+    // Mark the buffer as queued
+    if (V4L2_TYPE_IS_OUTPUT(buffer->type))
+        ctx->queued_output |= 1 << buffer->index;
+    else
+        ctx->queued_capture |= 1 << buffer->index;
+
+    return 0;
+}
+
+static int v4l2_request_queue_capture_buffer(V4L2RequestContext *ctx,
+                                             uint32_t index)
+{
+    struct v4l2_buffer buffer = {
+        .index = index,
+        .type = ctx->fctxi->capture.format.type,
+        .memory = V4L2_MEMORY_MMAP,
+    };
+    return v4l2_request_queue_buffer(ctx, &buffer);
+}
+
+static int v4l2_request_queue_output_buffer(V4L2RequestContext *ctx,
+                                            V4L2RequestOutputBuffer *output,
+                                            uint32_t flags)
+{
+    struct v4l2_buffer buffer = {
+        .index = output->index,
+        .type = ctx->fctxi->output.format.type,
+        .memory = V4L2_MEMORY_MMAP,
+        .timestamp = output->timestamp,
+        .bytesused = output->bytesused,
+        .request_fd = output->request_fd,
+        .flags = V4L2_BUF_FLAG_REQUEST_FD | flags,
+    };
+    return v4l2_request_queue_buffer(ctx, &buffer);
+}
+
+static int v4l2_request_dequeue_buffer(V4L2RequestContext *ctx,
+                                       enum v4l2_buf_type type)
+{
+    struct v4l2_plane planes[V4L2_PLANES_MAX] = {};
+    struct v4l2_buffer buffer = {
+        .type = type,
+        .memory = V4L2_MEMORY_MMAP,
+    };
+
+    if (V4L2_TYPE_IS_MULTIPLANAR(buffer.type)) {
+        buffer.length = FF_ARRAY_ELEMS(planes);
+        buffer.m.planes = planes;
+    }
+
+    // Dequeue next completed buffer
+    if (ioctl(ctx->fctxi->video_fd, VIDIOC_DQBUF, &buffer) < 0)
+        return AVERROR(errno);
+
+    // Mark the buffer as dequeued
+    if (V4L2_TYPE_IS_OUTPUT(buffer.type))
+        ctx->queued_output &= ~(1 << buffer.index);
+    else
+        ctx->queued_capture &= ~(1 << buffer.index);
+
+    return 0;
+}
+
+static inline int v4l2_request_dequeue_completed_buffers(V4L2RequestContext *ctx,
+                                                         enum v4l2_buf_type type)
+{
+    int ret;
+
+    do {
+        ret = v4l2_request_dequeue_buffer(ctx, type);
+    } while (!ret);
+
+    return ret;
+}
+
+static int v4l2_request_wait_on_capture(V4L2RequestContext *ctx, uint32_t index)
+{
+    enum v4l2_buf_type type = ctx->fctxi->capture.format.type;
+    struct pollfd pollfd = {
+        .fd = ctx->fctxi->video_fd,
+        .events = POLLIN,
+    };
+
+    ff_mutex_lock(&ctx->mutex);
+
+    // Dequeue all completed CAPTURE buffers
+    if (ctx->queued_capture)
+        v4l2_request_dequeue_completed_buffers(ctx, type);
+
+    // Wait on the specific CAPTURE buffer
+    while (ctx->queued_capture & (1 << index)) {
+        int ret = poll(&pollfd, 1, 2000);
+        if (ret <= 0)
+            goto fail;
+
+        ret = v4l2_request_dequeue_buffer(ctx, type);
+        if (ret < 0 && ret != AVERROR(EAGAIN))
+            goto fail;
+    }
+
+    ff_mutex_unlock(&ctx->mutex);
+    return 0;
+
+fail:
+    ff_mutex_unlock(&ctx->mutex);
+    av_log(ctx, AV_LOG_ERROR, "Failed waiting on CAPTURE buffer %d\n", index);
+    return AVERROR(EINVAL);
+}
+
+static V4L2RequestOutputBuffer *v4l2_request_next_output(V4L2RequestContext *ctx)
+{
+    enum v4l2_buf_type type = ctx->fctxi->output.format.type;
+    V4L2RequestOutputBuffer *output;
+    struct pollfd pollfd = {
+        .fd = ctx->fctxi->video_fd,
+        .events = POLLOUT,
+    };
+    uint8_t index;
+
+    ff_mutex_lock(&ctx->mutex);
+
+    // Use next OUTPUT buffer in the circular queue
+    index = ctx->next_output;
+    output = &ctx->output[index];
+    ctx->next_output = (index + 1) % FF_ARRAY_ELEMS(ctx->output);
+
+    // Dequeue all completed OUTPUT buffers
+    if (ctx->queued_output)
+        v4l2_request_dequeue_completed_buffers(ctx, type);
+
+    // Wait on the specific OUTPUT buffer
+    while (ctx->queued_output & (1 << output->index)) {
+        int ret = poll(&pollfd, 1, 2000);
+        if (ret <= 0)
+            goto fail;
+
+        ret = v4l2_request_dequeue_buffer(ctx, type);
+        if (ret < 0 && ret != AVERROR(EAGAIN))
+            goto fail;
+    }
+
+    ff_mutex_unlock(&ctx->mutex);
+
+    // Reset bytesused state
+    output->bytesused = 0;
+
+    return output;
+
+fail:
+    ff_mutex_unlock(&ctx->mutex);
+    av_log(ctx, AV_LOG_ERROR, "Failed waiting on OUTPUT buffer %d\n",
+           output->index);
+    return NULL;
+}
+
+static int v4l2_request_wait_on_request(V4L2RequestContext *ctx,
+                                        V4L2RequestOutputBuffer *output)
+{
+    struct pollfd pollfd = {
+        .fd = output->request_fd,
+        .events = POLLPRI,
+    };
+
+    // Wait on the specific request to complete
+    while (ctx->queued_request & (1 << output->index)) {
+        int ret = poll(&pollfd, 1, 2000);
+        if (ret <= 0)
+            break;
+
+        // Mark request as dequeued
+        if (pollfd.revents & (POLLPRI | POLLERR)) {
+            ctx->queued_request &= ~(1 << output->index);
+            break;
+        }
+    }
+
+    // Reinit the request object
+    if (ioctl(output->request_fd, MEDIA_REQUEST_IOC_REINIT) < 0) {
+        int ret = AVERROR(errno);
+        av_log(ctx, AV_LOG_ERROR, "Failed to reinit request object %d: %s (%d)\n",
+               output->request_fd, strerror(errno), errno);
+        return ret;
+    }
+
+    // Ensure request is marked as dequeued
+    ctx->queued_request &= ~(1 << output->index);
+
+    return 0;
+}
+
+int ff_v4l2_request_append_output(AVCodecContext *avctx,
+                                  V4L2RequestPictureContext *pic,
+                                  const uint8_t *data, uint32_t size)
+{
+    V4L2RequestContext *ctx = v4l2_request_context(avctx);
+
+    // Append data to OUTPUT buffer and ensure there is enough space for padding
+    if (pic->output->bytesused + size + AV_INPUT_BUFFER_PADDING_SIZE <= pic->output->size) {
+        memcpy(pic->output->addr + pic->output->bytesused, data, size);
+        pic->output->bytesused += size;
+        return 0;
+    } else {
+        av_log(ctx, AV_LOG_ERROR,
+               "Failed to append %u bytes data to OUTPUT buffer %d (%u of %u used)\n",
+               size, pic->output->index, pic->output->bytesused, pic->output->size);
+        return AVERROR(ENOMEM);
+    }
+}
+
+static int v4l2_request_queue_decode(AVCodecContext *avctx,
+                                     V4L2RequestPictureContext *pic,
+                                     struct v4l2_ext_control *control, int count,
+                                     bool first_slice, bool last_slice)
+{
+    V4L2RequestContext *ctx = v4l2_request_context(avctx);
+    uint32_t flags;
+    int ret;
+
+    if (first_slice) {
+        /*
+         * Wait on dequeue of the target CAPTURE buffer. Otherwise V4L2 decoder
+         * may use a different CAPTURE buffer than hwaccel expects.
+         *
+         * Normally decoding has already completed when a CAPTURE buffer is
+         * reused so this is more or less a no-op, however in some situations
+         * FFmpeg may reuse an AVFrame early, i.e. when no output frame was
+         * produced prior time, and a synchronization is necessary.
+         */
+        ret = v4l2_request_wait_on_capture(ctx, pic->capture_index);
+        if (ret < 0)
+            return ret;
+    }
+
+    ff_mutex_lock(&ctx->mutex);
+
+    /*
+     * The OUTPUT buffer tied to prior use of current request object can
+     * independently be dequeued before the full decode request has been
+     * completed. This may happen when a decoder use multi stage decoding,
+     * e.g. rpi-hevc-dec. In such case we can start reusing the OUTPUT buffer,
+     * however we must wait on the prior request to fully complete before we
+     * can reuse the request object, and a synchronization is necessary.
+     */
+    ret = v4l2_request_wait_on_request(ctx, pic->output);
+    if (ret < 0)
+        goto fail;
+
+    /*
+     * Dequeue any completed OUTPUT buffers, this is strictly not necessary,
+     * however if a synchronization was necessary for the CAPTURE and/or request
+     * there is more than likely one or more OUTPUT buffers that can be dequeued.
+     */
+    if (ctx->queued_output)
+        v4l2_request_dequeue_completed_buffers(ctx, ctx->fctxi->output.format.type);
+
+    // Set codec controls for current request
+    ret = v4l2_request_set_controls(ctx, pic->output->request_fd, control, count);
+    if (ret < 0) {
+        av_log(ctx, AV_LOG_ERROR, "Failed to set %d control(s) for request %d: %s (%d)\n",
+               count, pic->output->request_fd, strerror(errno), errno);
+        goto fail;
+    }
+
+    // Ensure there is zero padding at the end of bitstream data
+    memset(pic->output->addr + pic->output->bytesused, 0, AV_INPUT_BUFFER_PADDING_SIZE);
+
+    /*
+     * Use CAPTURE buffer index as base for V4L2 frame reference.
+     * This works because a CAPTURE buffer is closely tied to a AVFrame
+     * and FFmpeg handle all frame reference tracking for us.
+     */
+    pic->output->timestamp = (struct timeval) {
+        .tv_sec = 0,
+        .tv_usec = pic->capture_index + 1,
+    };
+
+    /*
+     * Queue the OUTPUT buffer of current request. The CAPTURE buffer may be
+     * hold by the V4L2 decoder unless this is the last slice of a frame.
+     */
+    flags = last_slice ? 0 : V4L2_BUF_FLAG_M2M_HOLD_CAPTURE_BUF;
+    ret = v4l2_request_queue_output_buffer(ctx, pic->output, flags);
+    if (ret < 0) {
+        av_log(ctx, AV_LOG_ERROR, "Failed to queue OUTPUT buffer %d for request %d: %s (%d)\n",
+               pic->output->index, pic->output->request_fd, strerror(errno), errno);
+        goto fail;
+    }
+
+    if (first_slice) {
+        /*
+         * Queue the target CAPTURE buffer, hwaccel expect and depend on that
+         * this specific CAPTURE buffer will be used as decode target for
+         * current request, otherwise frames may be output in wrong order or
+         * wrong CAPTURE buffer could get used as a reference frame.
+         */
+        ret = v4l2_request_queue_capture_buffer(ctx, pic->capture_index);
+        if (ret < 0) {
+            av_log(ctx, AV_LOG_ERROR, "Failed to queue CAPTURE buffer %d for request %d: %s (%d)\n",
+                   pic->capture_index, pic->output->request_fd, strerror(errno), errno);
+            goto fail;
+        }
+    }
+
+    // Queue current request
+    ret = ioctl(pic->output->request_fd, MEDIA_REQUEST_IOC_QUEUE);
+    if (ret < 0) {
+        ret = AVERROR(errno);
+        av_log(ctx, AV_LOG_ERROR, "Failed to queue request object %d: %s (%d)\n",
+               pic->output->request_fd, strerror(errno), errno);
+        goto fail;
+    }
+
+    // Mark current request as queued
+    ctx->queued_request |= 1 << pic->output->index;
+
+    ret = 0;
+fail:
+    ff_mutex_unlock(&ctx->mutex);
+    return ret;
+}
+
+int ff_v4l2_request_decode_slice(AVCodecContext *avctx,
+                                 V4L2RequestPictureContext *pic,
+                                 struct v4l2_ext_control *control, int count,
+                                 bool first_slice, bool last_slice)
+{
+    V4L2RequestContext *ctx = v4l2_request_context(avctx);
+
+    /*
+     * Fallback to queue each slice as a full frame when holding CAPTURE
+     * buffers is not supported by the driver.
+     */
+    if ((ctx->fctxi->output.capabilities & V4L2_BUF_CAP_SUPPORTS_M2M_HOLD_CAPTURE_BUF) !=
+        V4L2_BUF_CAP_SUPPORTS_M2M_HOLD_CAPTURE_BUF)
+        return v4l2_request_queue_decode(avctx, pic, control, count, true, true);
+
+    return v4l2_request_queue_decode(avctx, pic, control, count,
+                                     first_slice, last_slice);
+}
+
+int ff_v4l2_request_decode_frame(AVCodecContext *avctx,
+                                 V4L2RequestPictureContext *pic,
+                                 struct v4l2_ext_control *control, int count)
+{
+    return v4l2_request_queue_decode(avctx, pic, control, count, true, true);
+}
+
+static int v4l2_request_post_process(void *logctx, AVFrame *frame)
+{
+    uint32_t index = v4l2_request_frameindex(frame);
+    FrameDecodeData *fdd = frame->private_ref;
+    V4L2RequestContext *ctx = fdd->hwaccel_priv;
+
+    // Wait on CAPTURE buffer before returning the frame to application
+    return v4l2_request_wait_on_capture(ctx, index);
+}
+
+int ff_v4l2_request_reset_picture(AVCodecContext *avctx, V4L2RequestPictureContext *pic)
+{
+    V4L2RequestContext *ctx = v4l2_request_context(avctx);
+
+    // Get and wait on next OUTPUT buffer from circular queue
+    pic->output = v4l2_request_next_output(ctx);
+    if (!pic->output)
+        return AVERROR(EINVAL);
+
+    return 0;
+}
+
+int ff_v4l2_request_start_frame(AVCodecContext *avctx,
+                                V4L2RequestPictureContext *pic,
+                                AVFrame *frame)
+{
+    V4L2RequestContext *ctx = v4l2_request_context(avctx);
+    uint32_t index = v4l2_request_frameindex(frame);
+    FrameDecodeData *fdd = frame->private_ref;
+    int ret;
+
+    // Get next OUTPUT buffer from circular queue
+    ret = ff_v4l2_request_reset_picture(avctx, pic);
+    if (ret)
+        return ret;
+
+    // Ensure CAPTURE buffer is dequeued before reuse
+    ret = v4l2_request_wait_on_capture(ctx, index);
+    if (ret)
+        return ret;
+
+    // Wait on CAPTURE buffer in post_process() before returning to application
+    fdd->hwaccel_priv = ctx;
+    fdd->post_process = v4l2_request_post_process;
+
+    // CAPTURE buffer used for current frame
+    pic->capture_index = index;
+
+    return 0;
+}
+
+void ff_v4l2_request_flush(AVCodecContext *avctx)
+{
+    V4L2RequestContext *ctx = v4l2_request_context(avctx);
+    enum v4l2_buf_type type = ctx->fctxi->output.format.type;
+    struct pollfd pollfd = {
+        .fd = ctx->fctxi->video_fd,
+        .events = POLLOUT,
+    };
+
+    ff_mutex_lock(&ctx->mutex);
+
+    // Dequeue all completed OUTPUT buffers
+    if (ctx->queued_output)
+        v4l2_request_dequeue_completed_buffers(ctx, type);
+
+    // Wait on any remaining OUTPUT buffer
+    while (ctx->queued_output) {
+        int ret = poll(&pollfd, 1, 2000);
+        if (ret <= 0)
+            break;
+
+        ret = v4l2_request_dequeue_buffer(ctx, type);
+        if (ret < 0 && ret != AVERROR(EAGAIN))
+            break;
+    }
+
+    // Dequeue all completed CAPTURE buffers
+    if (ctx->queued_capture)
+        v4l2_request_dequeue_completed_buffers(ctx, ctx->fctxi->capture.format.type);
+
+    ff_mutex_unlock(&ctx->mutex);
+}
+
+static void v4l2_request_output_buffer_uninit(V4L2RequestOutputBuffer *output)
+{
+    // Close the request associated with the OUTPUT buffer
+    if (output->request_fd >= 0) {
+        close(output->request_fd);
+        output->request_fd = -1;
+    }
+
+    // Umap the OUTPUT buffer memory
+    if (output->addr) {
+        munmap(output->addr, output->size);
+        output->addr = NULL;
+    }
+
+    // Return the OUTPUT buffer to the frames context OUTPUT pool
+    av_buffer_unref(&output->ref);
+}
+
+static int v4l2_request_output_buffer_init(V4L2RequestContext *ctx,
+                                           V4L2RequestOutputBuffer *output)
+{
+    struct v4l2_format *format = &ctx->fctxi->output.format;
+    struct v4l2_buffer *buffer;
+    off_t offset;
+    void *addr;
+    int ret;
+
+    // Get an OUTPUT buffer from frames context OUTPUT pool
+    output->ref = av_buffer_pool_get(ctx->fctxi->output.pool);
+    if (!output->ref)
+        return AVERROR(ENOMEM);
+
+    buffer = (struct v4l2_buffer *)output->ref->data;
+    output->index = buffer->index;
+    output->size = V4L2_TYPE_IS_MULTIPLANAR(format->type) ?
+                   format->fmt.pix_mp.plane_fmt[0].sizeimage :
+                   format->fmt.pix.sizeimage;
+    output->bytesused = 0;
+
+    // Map the OUTPUT buffer memory, raw bitstream data is written into it
+    offset = V4L2_TYPE_IS_MULTIPLANAR(buffer->type) ?
+             buffer->m.planes[0].m.mem_offset :
+             buffer->m.offset;
+    addr = mmap(NULL, output->size, PROT_READ | PROT_WRITE, MAP_SHARED,
+                ctx->fctxi->video_fd, offset);
+    if (addr == MAP_FAILED) {
+        ret = AVERROR(errno);
+        av_log(ctx, AV_LOG_ERROR, "Failed to map OUTPUT buffer %d: %s (%d)\n",
+               output->index, strerror(errno), errno);
+        goto fail;
+    }
+    output->addr = addr;
+
+    // Allocate and associated a request for the OUTPUT buffer
+    if (ioctl(ctx->fctxi->media_fd, MEDIA_IOC_REQUEST_ALLOC, &output->request_fd) < 0) {
+        ret = AVERROR(errno);
+        av_log(ctx, AV_LOG_ERROR, "Failed to allocate request for OUTPUT buffer %d: %s (%d)\n",
+               output->index, strerror(errno), errno);
+        goto fail;
+    }
+
+    return 0;
+
+fail:
+    v4l2_request_output_buffer_uninit(output);
+    return ret;
+}
+
+int ff_v4l2_request_frame_params(AVCodecContext *avctx,
+                                 AVBufferRef *hw_frames_ctx,
+                                 uint32_t pixelformat,
+                                 uint8_t bit_depth)
+{
+    V4L2RequestContext *ctx = v4l2_request_context(avctx);
+    AVHWFramesContext *hwfc = (AVHWFramesContext *)hw_frames_ctx->data;
+    AVV4L2RequestFramesContext *fctx = hwfc->hwctx;
+
+    // Set parameters used during frames context initialization
+    fctx->pixelformat = pixelformat;
+    fctx->bit_depth = bit_depth;
+    if (ctx) {
+        fctx->init_controls = ctx->init_controls;
+        fctx->nb_init_controls = ctx->nb_init_controls;
+    }
+
+    hwfc->format = AV_PIX_FMT_DRM_PRIME;
+    hwfc->sw_format = AV_PIX_FMT_NONE;
+    hwfc->width = avctx->coded_width;
+    hwfc->height = avctx->coded_height;
+
+    // Pre-allocate CAPTURE buffers to ensure CAPTURE queue can be started
+    hwfc->initial_pool_size = 1;
+
+    return 0;
+}
+
+int ff_v4l2_request_uninit(AVCodecContext *avctx)
+{
+    V4L2RequestContext *ctx = v4l2_request_context(avctx);
+    enum v4l2_buf_type type;
+
+    if (ctx->fctxi) {
+        // Flush and wait on all pending requests
+        ff_v4l2_request_flush(avctx);
+
+        // Stop streaming on OUTPUT queue
+        type = ctx->fctxi->output.format.type;
+        if (ioctl(ctx->fctxi->video_fd, VIDIOC_STREAMOFF, &type) < 0)
+            av_log(ctx, AV_LOG_WARNING, "Failed to stop OUTPUT streaming: %s (%d)\n",
+                   strerror(errno), errno);
+
+        // Stop streaming on CAPTURE queue
+        type = ctx->fctxi->capture.format.type;
+        if (ioctl(ctx->fctxi->video_fd, VIDIOC_STREAMOFF, &type) < 0)
+            av_log(ctx, AV_LOG_WARNING, "Failed to stop CAPTURE streaming: %s (%d)\n",
+                   strerror(errno), errno);
+
+        // Release OUTPUT buffers and requests
+        for (int i = 0; i < FF_ARRAY_ELEMS(ctx->output); i++)
+            v4l2_request_output_buffer_uninit(&ctx->output[i]);
+
+        ctx->fctxi = NULL;
+    }
+
+    av_buffer_unref(&ctx->frames_ref);
+    ff_mutex_destroy(&ctx->mutex);
+
+    return 0;
+}
+
+int ff_v4l2_request_init(AVCodecContext *avctx,
+                         struct v4l2_ext_control *control, int count,
+                         int (*post_frames_ctx)(AVCodecContext *avctx))
+{
+    V4L2RequestContext *ctx = v4l2_request_context(avctx);
+    AVHWFramesContext *hwfc;
+    AVV4L2RequestFramesContext *fctx;
+    enum v4l2_buf_type type;
+    int ret;
+
+    // Set initial default values
+    ctx->av_class = &v4l2_request_context_class;
+    ctx->init_controls = control;
+    ctx->nb_init_controls = count;
+    ff_mutex_init(&ctx->mutex, NULL);
+    for (int i = 0; i < FF_ARRAY_ELEMS(ctx->output); i++) {
+        ctx->output[i].index = i;
+        ctx->output[i].request_fd = -1;
+    }
+
+    // Create frames context and allocate initial CAPTURE buffers
+    ret = ff_decode_get_hw_frames_ctx(avctx, AV_HWDEVICE_TYPE_V4L2REQUEST);
+    if (ret < 0)
+        goto fail;
+
+    ctx->frames_ref = av_buffer_ref(avctx->hw_frames_ctx);
+    if (!ctx->frames_ref) {
+        ret = AVERROR(ENOMEM);
+        goto fail;
+    }
+
+    // Get internal hwctx from frames context
+    hwfc = (AVHWFramesContext *)ctx->frames_ref->data;
+    fctx = hwfc->hwctx;
+    ctx->fctxi = fctx->internal;
+
+    // Reset init controls after successful frames context initialization
+    ctx->init_controls = NULL;
+    ctx->nb_init_controls = 0;
+
+    // Check codec-specific controls, e.g. profile and level
+    if (post_frames_ctx) {
+        ret = post_frames_ctx(avctx);
+        if (ret < 0)
+            goto fail;
+    }
+
+    // Allocate OUTPUT buffers and requests for circular queue
+    for (int i = 0; i < FF_ARRAY_ELEMS(ctx->output); i++) {
+        ret = v4l2_request_output_buffer_init(ctx, &ctx->output[i]);
+        if (ret < 0)
+            goto fail;
+    }
+
+    // Start streaming on OUTPUT queue
+    type = ctx->fctxi->output.format.type;
+    if (ioctl(ctx->fctxi->video_fd, VIDIOC_STREAMON, &type) < 0) {
+        ret = AVERROR(errno);
+        av_log(ctx, AV_LOG_ERROR, "Failed to start OUTPUT streaming: %s (%d)\n",
+               strerror(errno), errno);
+        goto fail;
+    }
+
+    // Start streaming on CAPTURE queue
+    type = ctx->fctxi->capture.format.type;
+    if (ioctl(ctx->fctxi->video_fd, VIDIOC_STREAMON, &type) < 0) {
+        ret = AVERROR(errno);
+        av_log(ctx, AV_LOG_ERROR, "Failed to start CAPTURE streaming: %s (%d)\n",
+               strerror(errno), errno);
+        goto fail;
+    }
+
+    return 0;
+
+fail:
+    ff_v4l2_request_uninit(avctx);
+    return ret;
+}

thirdparty/ffmpeg/libavcodec/v4l2_request.h

@@ -0,0 +1,105 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVCODEC_V4L2_REQUEST_H
+#define AVCODEC_V4L2_REQUEST_H
+
+#include <stdbool.h>
+#include <stdint.h>
+#include <linux/videodev2.h>
+
+#include "libavutil/buffer.h"
+#include "libavutil/log.h"
+#include "libavutil/thread.h"
+#include "avcodec.h"
+
+typedef struct AVV4L2RequestFramesContextInternal AVV4L2RequestFramesContextInternal;
+
+typedef struct V4L2RequestOutputBuffer {
+    AVBufferRef *ref;
+    uint32_t index;
+    int request_fd;
+    uint8_t *addr;
+    uint32_t size;
+    uint32_t bytesused;
+    struct timeval timestamp;
+} V4L2RequestOutputBuffer;
+
+typedef struct V4L2RequestContext {
+    const AVClass *av_class;
+    AVBufferRef *frames_ref;
+    AVV4L2RequestFramesContextInternal *fctxi;
+    AVMutex mutex;
+    V4L2RequestOutputBuffer output[4];
+    uint8_t next_output;
+    uint32_t queued_output;
+    uint32_t queued_request;
+    uint64_t queued_capture;
+    struct v4l2_ext_control *init_controls;
+    int nb_init_controls;
+} V4L2RequestContext;
+
+typedef struct V4L2RequestPictureContext {
+    V4L2RequestOutputBuffer *output;
+    uint32_t capture_index;
+} V4L2RequestPictureContext;
+
+uint64_t ff_v4l2_request_get_capture_timestamp(AVFrame *frame);
+
+int ff_v4l2_request_query_control(AVCodecContext *avctx,
+                                  struct v4l2_query_ext_ctrl *control);
+
+int ff_v4l2_request_query_control_default_value(AVCodecContext *avctx,
+                                                uint32_t id);
+
+int ff_v4l2_request_set_controls(AVCodecContext *avctx,
+                                 struct v4l2_ext_control *control, int count);
+
+int ff_v4l2_request_append_output(AVCodecContext *avctx,
+                                  V4L2RequestPictureContext *pic,
+                                  const uint8_t *data, uint32_t size);
+
+int ff_v4l2_request_decode_slice(AVCodecContext *avctx,
+                                 V4L2RequestPictureContext *pic,
+                                 struct v4l2_ext_control *control, int count,
+                                 bool first_slice, bool last_slice);
+
+int ff_v4l2_request_decode_frame(AVCodecContext *avctx,
+                                 V4L2RequestPictureContext *pic,
+                                 struct v4l2_ext_control *control, int count);
+
+int ff_v4l2_request_reset_picture(AVCodecContext *avctx,
+                                  V4L2RequestPictureContext *pic);
+
+int ff_v4l2_request_start_frame(AVCodecContext *avctx,
+                                V4L2RequestPictureContext *pic, AVFrame *frame);
+
+void ff_v4l2_request_flush(AVCodecContext *avctx);
+
+int ff_v4l2_request_frame_params(AVCodecContext *avctx,
+                                 AVBufferRef *hw_frames_ctx,
+                                 uint32_t pixelformat,
+                                 uint8_t bit_depth);
+
+int ff_v4l2_request_uninit(AVCodecContext *avctx);
+
+int ff_v4l2_request_init(AVCodecContext *avctx,
+                         struct v4l2_ext_control *control, int count,
+                         int (*post_frames_ctx)(AVCodecContext *avctx));
+
+#endif /* AVCODEC_V4L2_REQUEST_H */

thirdparty/ffmpeg/libavcodec/v4l2_request_av1.c

@@ -0,0 +1,636 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "config.h"
+
+#include "libavutil/mem.h"
+#include "hwaccel_internal.h"
+#include "hwconfig.h"
+#include "av1dec.h"
+#include "internal.h"
+#include "v4l2_request.h"
+
+#define V4L2_AV1_CONTROLS_MAX 4
+
+typedef struct V4L2RequestContextAV1 {
+    V4L2RequestContext base;
+    bool has_film_grain;
+} V4L2RequestContextAV1;
+
+typedef struct V4L2RequestControlsAV1 {
+    V4L2RequestPictureContext pic;
+    struct v4l2_ctrl_av1_sequence sequence;
+    struct v4l2_ctrl_av1_frame frame;
+    struct v4l2_ctrl_av1_film_grain film_grain;
+    struct v4l2_ctrl_av1_tile_group_entry tile_group_entry;
+    struct v4l2_ctrl_av1_tile_group_entry *tile_group_entries;
+    unsigned int allocated_tile_group_entries;
+    unsigned int num_tile_group_entries;
+} V4L2RequestControlsAV1;
+
+static int get_bit_depth_from_seq(const AV1RawSequenceHeader *seq)
+{
+    if (seq->seq_profile == AV_PROFILE_AV1_PROFESSIONAL &&
+        seq->color_config.high_bitdepth)
+        return seq->color_config.twelve_bit ? 12 : 10;
+    else
+        return seq->color_config.high_bitdepth ? 10 : 8;
+}
+
+static void fill_sequence(struct v4l2_ctrl_av1_sequence *ctrl,
+                          const AV1DecContext *s)
+{
+    const AV1RawSequenceHeader *seq = s->raw_seq;
+
+    *ctrl = (struct v4l2_ctrl_av1_sequence) {
+        .seq_profile = seq->seq_profile,
+        .order_hint_bits = seq->enable_order_hint ?
+                           seq->order_hint_bits_minus_1 + 1 : 0,
+        .bit_depth = get_bit_depth_from_seq(seq),
+        .max_frame_width_minus_1 = seq->max_frame_width_minus_1,
+        .max_frame_height_minus_1 = seq->max_frame_height_minus_1,
+    };
+
+    if (seq->still_picture)
+        ctrl->flags |= V4L2_AV1_SEQUENCE_FLAG_STILL_PICTURE;
+
+    if (seq->use_128x128_superblock)
+        ctrl->flags |= V4L2_AV1_SEQUENCE_FLAG_USE_128X128_SUPERBLOCK;
+
+    if (seq->enable_filter_intra)
+        ctrl->flags |= V4L2_AV1_SEQUENCE_FLAG_ENABLE_FILTER_INTRA;
+
+    if (seq->enable_intra_edge_filter)
+        ctrl->flags |= V4L2_AV1_SEQUENCE_FLAG_ENABLE_INTRA_EDGE_FILTER;
+
+    if (seq->enable_interintra_compound)
+        ctrl->flags |= V4L2_AV1_SEQUENCE_FLAG_ENABLE_INTERINTRA_COMPOUND;
+
+    if (seq->enable_masked_compound)
+        ctrl->flags |= V4L2_AV1_SEQUENCE_FLAG_ENABLE_MASKED_COMPOUND;
+
+    if (seq->enable_warped_motion)
+        ctrl->flags |= V4L2_AV1_SEQUENCE_FLAG_ENABLE_WARPED_MOTION;
+
+    if (seq->enable_dual_filter)
+        ctrl->flags |= V4L2_AV1_SEQUENCE_FLAG_ENABLE_DUAL_FILTER;
+
+    if (seq->enable_order_hint)
+        ctrl->flags |= V4L2_AV1_SEQUENCE_FLAG_ENABLE_ORDER_HINT;
+
+    if (seq->enable_jnt_comp)
+        ctrl->flags |= V4L2_AV1_SEQUENCE_FLAG_ENABLE_JNT_COMP;
+
+    if (seq->enable_ref_frame_mvs)
+        ctrl->flags |= V4L2_AV1_SEQUENCE_FLAG_ENABLE_REF_FRAME_MVS;
+
+    if (seq->enable_superres)
+        ctrl->flags |= V4L2_AV1_SEQUENCE_FLAG_ENABLE_SUPERRES;
+
+    if (seq->enable_cdef)
+        ctrl->flags |= V4L2_AV1_SEQUENCE_FLAG_ENABLE_CDEF;
+
+    if (seq->enable_restoration)
+        ctrl->flags |= V4L2_AV1_SEQUENCE_FLAG_ENABLE_RESTORATION;
+
+    if (seq->color_config.mono_chrome)
+        ctrl->flags |= V4L2_AV1_SEQUENCE_FLAG_MONO_CHROME;
+
+    if (seq->color_config.color_range)
+        ctrl->flags |= V4L2_AV1_SEQUENCE_FLAG_COLOR_RANGE;
+
+    if (seq->color_config.subsampling_x)
+        ctrl->flags |= V4L2_AV1_SEQUENCE_FLAG_SUBSAMPLING_X;
+
+    if (seq->color_config.subsampling_y)
+        ctrl->flags |= V4L2_AV1_SEQUENCE_FLAG_SUBSAMPLING_Y;
+
+    if (seq->film_grain_params_present)
+        ctrl->flags |= V4L2_AV1_SEQUENCE_FLAG_FILM_GRAIN_PARAMS_PRESENT;
+
+    if (seq->color_config.separate_uv_delta_q)
+        ctrl->flags |= V4L2_AV1_SEQUENCE_FLAG_SEPARATE_UV_DELTA_Q;
+}
+
+static void fill_frame(struct v4l2_ctrl_av1_frame *ctrl, const AV1DecContext *s)
+{
+    const AV1RawFrameHeader *frame_header = s->raw_frame_header;
+    const CodedBitstreamAV1Context *cbctx = s->cbc->priv_data;
+    uint8_t remap_lr_type[4] = {
+        V4L2_AV1_FRAME_RESTORE_NONE,
+        V4L2_AV1_FRAME_RESTORE_SWITCHABLE,
+        V4L2_AV1_FRAME_RESTORE_WIENER,
+        V4L2_AV1_FRAME_RESTORE_SGRPROJ,
+    };
+    int i, j;
+
+    *ctrl = (struct v4l2_ctrl_av1_frame) {
+        .tile_info = {
+            .context_update_tile_id = frame_header->context_update_tile_id,
+            .tile_cols = frame_header->tile_cols,
+            .tile_rows = frame_header->tile_rows,
+            .tile_size_bytes = frame_header->tile_cols_log2 > 0 ||
+                               frame_header->tile_rows_log2 > 0 ?
+                               frame_header->tile_size_bytes_minus1 + 1 : 0,
+        },
+
+        .quantization = {
+            .base_q_idx = frame_header->base_q_idx,
+            .delta_q_y_dc = frame_header->delta_q_y_dc,
+            .delta_q_u_dc = frame_header->delta_q_u_dc,
+            .delta_q_u_ac = frame_header->delta_q_u_ac,
+            .delta_q_v_dc = frame_header->delta_q_v_dc,
+            .delta_q_v_ac = frame_header->delta_q_v_ac,
+            .qm_y = frame_header->qm_y,
+            .qm_u = frame_header->qm_u,
+            .qm_v = frame_header->qm_v,
+            .delta_q_res = frame_header->delta_q_res,
+        },
+
+        .loop_filter = {
+            .level[0] = frame_header->loop_filter_level[0],
+            .level[1] = frame_header->loop_filter_level[1],
+            .level[2] = frame_header->loop_filter_level[2],
+            .level[3] = frame_header->loop_filter_level[3],
+            .sharpness = frame_header->loop_filter_sharpness,
+            .mode_deltas[0] = frame_header->loop_filter_mode_deltas[0],
+            .mode_deltas[1] = frame_header->loop_filter_mode_deltas[1],
+            .delta_lf_res = frame_header->delta_lf_res,
+        },
+
+        .cdef = {
+            .damping_minus_3 = frame_header->cdef_damping_minus_3,
+            .bits = frame_header->cdef_bits,
+        },
+
+        .loop_restoration = {
+            .lr_unit_shift = frame_header->lr_unit_shift,
+            .lr_uv_shift = frame_header->lr_uv_shift,
+        },
+
+        .superres_denom = frame_header->use_superres ?
+                          frame_header->coded_denom + AV1_SUPERRES_DENOM_MIN :
+                          AV1_SUPERRES_NUM,
+        .skip_mode_frame[0] = frame_header->skip_mode_present ?
+                              s->cur_frame.skip_mode_frame_idx[0] : 0,
+        .skip_mode_frame[1] = frame_header->skip_mode_present ?
+                              s->cur_frame.skip_mode_frame_idx[1] : 0,
+        .primary_ref_frame = frame_header->primary_ref_frame,
+        .frame_type = frame_header->frame_type,
+        .order_hint = frame_header->order_hint,
+        .upscaled_width = cbctx->upscaled_width,
+        .interpolation_filter = frame_header->interpolation_filter,
+        .tx_mode = frame_header->tx_mode,
+        .frame_width_minus_1 = cbctx->frame_width - 1,
+        .frame_height_minus_1 = cbctx->frame_height - 1,
+        .render_width_minus_1 = cbctx->render_width - 1,
+        .render_height_minus_1 = cbctx->render_height - 1,
+        .current_frame_id = frame_header->current_frame_id,
+        .refresh_frame_flags = frame_header->refresh_frame_flags,
+    };
+
+    if (frame_header->segmentation_enabled)
+        ctrl->segmentation.flags |= V4L2_AV1_SEGMENTATION_FLAG_ENABLED;
+
+    if (frame_header->segmentation_update_map)
+        ctrl->segmentation.flags |= V4L2_AV1_SEGMENTATION_FLAG_UPDATE_MAP;
+
+    if (frame_header->segmentation_temporal_update)
+        ctrl->segmentation.flags |= V4L2_AV1_SEGMENTATION_FLAG_TEMPORAL_UPDATE;
+
+    if (frame_header->segmentation_update_data)
+        ctrl->segmentation.flags |= V4L2_AV1_SEGMENTATION_FLAG_UPDATE_DATA;
+
+    for (i = 0; i < AV1_MAX_SEGMENTS; i++) {
+        for (j = 0; j < AV1_SEG_LVL_MAX; j++) {
+            if (frame_header->feature_enabled[i][j]) {
+                ctrl->segmentation.feature_enabled[i] |= V4L2_AV1_SEGMENT_FEATURE_ENABLED(j);
+                ctrl->segmentation.last_active_seg_id = i;
+                if (j >= AV1_SEG_LVL_REF_FRAME)
+                    ctrl->segmentation.flags |= V4L2_AV1_SEGMENTATION_FLAG_SEG_ID_PRE_SKIP;
+            }
+            ctrl->segmentation.feature_data[i][j] = frame_header->feature_value[i][j];
+        }
+    }
+
+    if (frame_header->uniform_tile_spacing_flag)
+        ctrl->tile_info.flags |= V4L2_AV1_TILE_INFO_FLAG_UNIFORM_TILE_SPACING;
+
+    for (i = 0; i < frame_header->tile_cols; i++) {
+        ctrl->tile_info.mi_col_starts[i] = frame_header->tile_start_col_sb[i];
+        ctrl->tile_info.width_in_sbs_minus_1[i] = frame_header->width_in_sbs_minus_1[i];
+    }
+    ctrl->tile_info.mi_col_starts[i] = 2 * ((cbctx->frame_width + 7) >> 3);
+
+    for (i = 0; i < frame_header->tile_rows; i++) {
+        ctrl->tile_info.mi_row_starts[i] = frame_header->tile_start_row_sb[i];
+        ctrl->tile_info.height_in_sbs_minus_1[i] = frame_header->height_in_sbs_minus_1[i];
+    }
+    ctrl->tile_info.mi_row_starts[i] = 2 * ((cbctx->frame_height + 7) >> 3);
+
+    if (frame_header->diff_uv_delta)
+        ctrl->quantization.flags |= V4L2_AV1_QUANTIZATION_FLAG_DIFF_UV_DELTA;
+
+    if (frame_header->using_qmatrix)
+        ctrl->quantization.flags |= V4L2_AV1_QUANTIZATION_FLAG_USING_QMATRIX;
+
+    if (frame_header->delta_q_present)
+        ctrl->quantization.flags |= V4L2_AV1_QUANTIZATION_FLAG_DELTA_Q_PRESENT;
+
+    if (frame_header->loop_filter_delta_enabled)
+        ctrl->loop_filter.flags |= V4L2_AV1_LOOP_FILTER_FLAG_DELTA_ENABLED;
+
+    if (frame_header->loop_filter_delta_update)
+        ctrl->loop_filter.flags |= V4L2_AV1_LOOP_FILTER_FLAG_DELTA_UPDATE;
+
+    if (frame_header->delta_lf_present)
+        ctrl->loop_filter.flags |= V4L2_AV1_LOOP_FILTER_FLAG_DELTA_LF_PRESENT;
+
+    if (frame_header->delta_lf_multi)
+        ctrl->loop_filter.flags |= V4L2_AV1_LOOP_FILTER_FLAG_DELTA_LF_MULTI;
+
+    for (i = 0; i < AV1_NUM_REF_FRAMES; i++) {
+        ctrl->loop_filter.ref_deltas[i] = frame_header->loop_filter_ref_deltas[i];
+    }
+
+    for (i = 0; i < cbctx->num_planes; i++) {
+        ctrl->loop_restoration.frame_restoration_type[i] =
+                                        remap_lr_type[frame_header->lr_type[i]];
+        if (frame_header->lr_type[i] != AV1_RESTORE_NONE) {
+            ctrl->loop_restoration.flags |= V4L2_AV1_LOOP_RESTORATION_FLAG_USES_LR;
+            if (i > 0)
+                ctrl->loop_restoration.flags |= V4L2_AV1_LOOP_RESTORATION_FLAG_USES_CHROMA_LR;
+        }
+    }
+    if (ctrl->loop_restoration.flags & V4L2_AV1_LOOP_RESTORATION_FLAG_USES_LR) {
+        ctrl->loop_restoration.loop_restoration_size[0] =
+            1 << (6 + frame_header->lr_unit_shift);
+        ctrl->loop_restoration.loop_restoration_size[1] =
+            1 << (6 + frame_header->lr_unit_shift - frame_header->lr_uv_shift);
+        ctrl->loop_restoration.loop_restoration_size[2] =
+            1 << (6 + frame_header->lr_unit_shift - frame_header->lr_uv_shift);
+    }
+
+    for (i = 0; i < AV1_TOTAL_REFS_PER_FRAME; i++) {
+        ctrl->global_motion.type[i] = s->cur_frame.gm_type[i];
+        for (j = 0; j < 6; ++j) {
+            ctrl->global_motion.params[i][j] = s->cur_frame.gm_params[i][j];
+            if (s->cur_frame.gm_invalid[i])
+                ctrl->global_motion.invalid |= V4L2_AV1_GLOBAL_MOTION_IS_INVALID(i);
+        }
+
+        if (frame_header->is_global[i])
+            ctrl->global_motion.flags[i] |= V4L2_AV1_GLOBAL_MOTION_FLAG_IS_GLOBAL;
+
+        if (frame_header->is_rot_zoom[i])
+            ctrl->global_motion.flags[i] |= V4L2_AV1_GLOBAL_MOTION_FLAG_IS_ROT_ZOOM;
+
+        if (frame_header->is_translation[i])
+            ctrl->global_motion.flags[i] |= V4L2_AV1_GLOBAL_MOTION_FLAG_IS_TRANSLATION;
+    }
+
+    for (i = 0; i < AV1_TOTAL_REFS_PER_FRAME; i++) {
+        AVFrame *ref = s->ref[i].f;
+
+        ctrl->order_hints[i] = s->cur_frame.order_hints[i];
+        if (ref)
+            ctrl->reference_frame_ts[i] = ff_v4l2_request_get_capture_timestamp(ref);
+        if (i < AV1_REFS_PER_FRAME)
+            ctrl->ref_frame_idx[i] = frame_header->ref_frame_idx[i];
+    }
+
+    for (i = 0; i < (1 << frame_header->cdef_bits); i++) {
+        ctrl->cdef.y_pri_strength[i] = frame_header->cdef_y_pri_strength[i];
+        ctrl->cdef.y_sec_strength[i] = frame_header->cdef_y_sec_strength[i];
+        ctrl->cdef.uv_pri_strength[i] = frame_header->cdef_uv_pri_strength[i];
+        ctrl->cdef.uv_sec_strength[i] = frame_header->cdef_uv_sec_strength[i];
+    }
+
+    if (frame_header->show_frame)
+        ctrl->flags |= V4L2_AV1_FRAME_FLAG_SHOW_FRAME;
+
+    if (frame_header->showable_frame)
+        ctrl->flags |= V4L2_AV1_FRAME_FLAG_SHOWABLE_FRAME;
+
+    if (frame_header->error_resilient_mode)
+        ctrl->flags |= V4L2_AV1_FRAME_FLAG_ERROR_RESILIENT_MODE;
+
+    if (frame_header->disable_cdf_update)
+        ctrl->flags |= V4L2_AV1_FRAME_FLAG_DISABLE_CDF_UPDATE;
+
+    if (frame_header->allow_screen_content_tools)
+        ctrl->flags |= V4L2_AV1_FRAME_FLAG_ALLOW_SCREEN_CONTENT_TOOLS;
+
+    if (s->cur_frame.force_integer_mv)
+        ctrl->flags |= V4L2_AV1_FRAME_FLAG_FORCE_INTEGER_MV;
+
+    if (frame_header->allow_intrabc)
+        ctrl->flags |= V4L2_AV1_FRAME_FLAG_ALLOW_INTRABC;
+
+    if (frame_header->use_superres)
+        ctrl->flags |= V4L2_AV1_FRAME_FLAG_USE_SUPERRES;
+
+    if (frame_header->allow_high_precision_mv)
+        ctrl->flags |= V4L2_AV1_FRAME_FLAG_ALLOW_HIGH_PRECISION_MV;
+
+    if (frame_header->is_motion_mode_switchable)
+        ctrl->flags |= V4L2_AV1_FRAME_FLAG_IS_MOTION_MODE_SWITCHABLE;
+
+    if (frame_header->use_ref_frame_mvs)
+        ctrl->flags |= V4L2_AV1_FRAME_FLAG_USE_REF_FRAME_MVS;
+
+    if (frame_header->disable_frame_end_update_cdf)
+        ctrl->flags |= V4L2_AV1_FRAME_FLAG_DISABLE_FRAME_END_UPDATE_CDF;
+
+    if (frame_header->allow_warped_motion)
+        ctrl->flags |= V4L2_AV1_FRAME_FLAG_ALLOW_WARPED_MOTION;
+
+    if (frame_header->reference_select)
+        ctrl->flags |= V4L2_AV1_FRAME_FLAG_REFERENCE_SELECT;
+
+    if (frame_header->reduced_tx_set)
+        ctrl->flags |= V4L2_AV1_FRAME_FLAG_REDUCED_TX_SET;
+
+    if (frame_header->skip_mode_present) {
+        ctrl->flags |= V4L2_AV1_FRAME_FLAG_SKIP_MODE_ALLOWED; // FIXME
+        ctrl->flags |= V4L2_AV1_FRAME_FLAG_SKIP_MODE_PRESENT;
+    }
+
+    if (frame_header->frame_size_override_flag)
+        ctrl->flags |= V4L2_AV1_FRAME_FLAG_FRAME_SIZE_OVERRIDE;
+
+    if (frame_header->buffer_removal_time_present_flag) {
+        ctrl->flags |= V4L2_AV1_FRAME_FLAG_BUFFER_REMOVAL_TIME_PRESENT;
+        for (i = 0; i < AV1_MAX_OPERATING_POINTS; i++)
+            ctrl->buffer_removal_time[i] = frame_header->buffer_removal_time[i];
+    }
+
+    if (frame_header->frame_refs_short_signaling)
+        ctrl->flags |= V4L2_AV1_FRAME_FLAG_FRAME_REFS_SHORT_SIGNALING;
+}
+
+static void fill_film_grain(struct v4l2_ctrl_av1_film_grain *ctrl,
+                            const AV1DecContext *s)
+{
+    const AV1RawFilmGrainParams *film_grain = &s->cur_frame.film_grain;
+    int i;
+
+    *ctrl = (struct v4l2_ctrl_av1_film_grain) {
+        .cr_mult = film_grain->cr_mult,
+        .grain_seed = film_grain->grain_seed,
+        .film_grain_params_ref_idx = film_grain->film_grain_params_ref_idx,
+        .num_y_points = film_grain->num_y_points,
+        .num_cb_points = film_grain->num_cb_points,
+        .num_cr_points = film_grain->num_cr_points,
+        .grain_scaling_minus_8 = film_grain->grain_scaling_minus_8,
+        .ar_coeff_lag = film_grain->ar_coeff_lag,
+        .ar_coeff_shift_minus_6 = film_grain->ar_coeff_shift_minus_6,
+        .grain_scale_shift = film_grain->grain_scale_shift,
+        .cb_mult = film_grain->cb_mult,
+        .cb_luma_mult = film_grain->cb_luma_mult,
+        .cr_luma_mult = film_grain->cr_luma_mult,
+        .cb_offset = film_grain->cb_offset,
+        .cr_offset = film_grain->cr_offset,
+    };
+
+    if (film_grain->apply_grain)
+        ctrl->flags |= V4L2_AV1_FILM_GRAIN_FLAG_APPLY_GRAIN;
+
+    if (film_grain->update_grain)
+        ctrl->flags |= V4L2_AV1_FILM_GRAIN_FLAG_UPDATE_GRAIN;
+
+    if (film_grain->chroma_scaling_from_luma)
+        ctrl->flags |= V4L2_AV1_FILM_GRAIN_FLAG_CHROMA_SCALING_FROM_LUMA;
+
+    if (film_grain->overlap_flag)
+        ctrl->flags |= V4L2_AV1_FILM_GRAIN_FLAG_OVERLAP;
+
+    if (film_grain->clip_to_restricted_range)
+        ctrl->flags |= V4L2_AV1_FILM_GRAIN_FLAG_CLIP_TO_RESTRICTED_RANGE;
+
+    if (!film_grain->apply_grain)
+        return;
+
+    for (i = 0; i < film_grain->num_y_points; i++) {
+        ctrl->point_y_value[i] = film_grain->point_y_value[i];
+        ctrl->point_y_scaling[i] = film_grain->point_y_scaling[i];
+    }
+
+    for (i = 0; i < film_grain->num_cb_points; i++) {
+        ctrl->point_cb_value[i] = film_grain->point_cb_value[i];
+        ctrl->point_cb_scaling[i] = film_grain->point_cb_scaling[i];
+    }
+
+    for (i = 0; i < film_grain->num_cr_points; i++) {
+        ctrl->point_cr_value[i] = film_grain->point_cr_value[i];
+        ctrl->point_cr_scaling[i] = film_grain->point_cr_scaling[i];
+    }
+
+    for (i = 0; i < 24; i++) {
+        ctrl->ar_coeffs_y_plus_128[i] = film_grain->ar_coeffs_y_plus_128[i];
+    }
+
+    for (i = 0; i < 25; i++) {
+        ctrl->ar_coeffs_cb_plus_128[i] = film_grain->ar_coeffs_cb_plus_128[i];
+        ctrl->ar_coeffs_cr_plus_128[i] = film_grain->ar_coeffs_cr_plus_128[i];
+    }
+}
+
+static int v4l2_request_av1_start_frame(AVCodecContext *avctx,
+                                        av_unused const AVBufferRef *buf_ref,
+                                        av_unused const uint8_t *buffer,
+                                        av_unused uint32_t size)
+{
+    const AV1DecContext *s = avctx->priv_data;
+    V4L2RequestContextAV1 *ctx = avctx->internal->hwaccel_priv_data;
+    V4L2RequestControlsAV1 *controls = s->cur_frame.hwaccel_picture_private;
+    int ret;
+
+    ret = ff_v4l2_request_start_frame(avctx, &controls->pic, s->cur_frame.f);
+    if (ret)
+        return ret;
+
+    fill_sequence(&controls->sequence, s);
+    fill_frame(&controls->frame, s);
+
+    if (ctx->has_film_grain)
+        fill_film_grain(&controls->film_grain, s);
+
+    controls->tile_group_entries = &controls->tile_group_entry;
+    controls->allocated_tile_group_entries = 0;
+    controls->num_tile_group_entries = 0;
+
+    return 0;
+}
+
+static int v4l2_request_av1_decode_slice(AVCodecContext *avctx,
+                                         const uint8_t *buffer, uint32_t size)
+{
+    const AV1DecContext *s = avctx->priv_data;
+    const AV1RawFrameHeader *fh = s->raw_frame_header;
+    V4L2RequestControlsAV1 *controls = s->cur_frame.hwaccel_picture_private;
+
+    controls->num_tile_group_entries = fh->tile_cols * fh->tile_rows;
+    if (controls->num_tile_group_entries > V4L2_AV1_MAX_TILE_COUNT)
+        return AVERROR(EINVAL);
+
+    if (controls->num_tile_group_entries > 1 &&
+        controls->num_tile_group_entries > controls->allocated_tile_group_entries) {
+        struct v4l2_ctrl_av1_tile_group_entry *tile_group_entries;
+
+        tile_group_entries = av_realloc_array(controls->allocated_tile_group_entries ?
+                                              controls->tile_group_entries : NULL,
+                                              controls->num_tile_group_entries,
+                                              sizeof(*controls->tile_group_entries));
+        if (!tile_group_entries)
+            return AVERROR(ENOMEM);
+
+        if (!controls->allocated_tile_group_entries)
+            memcpy(tile_group_entries, controls->tile_group_entries,
+                   sizeof(*controls->tile_group_entries));
+
+        controls->tile_group_entries = tile_group_entries;
+        controls->allocated_tile_group_entries = controls->num_tile_group_entries;
+    }
+
+    for (int i = 0; i < controls->num_tile_group_entries; i++) {
+        controls->tile_group_entries[i] = (struct v4l2_ctrl_av1_tile_group_entry) {
+            .tile_offset = controls->pic.output->bytesused +
+                           s->tile_group_info[i].tile_offset,
+            .tile_size   = s->tile_group_info[i].tile_size,
+            .tile_row    = s->tile_group_info[i].tile_row,
+            .tile_col    = s->tile_group_info[i].tile_column,
+        };
+    }
+
+    return ff_v4l2_request_append_output(avctx, &controls->pic, buffer, size);
+}
+
+static int v4l2_request_av1_end_frame(AVCodecContext *avctx)
+{
+    const AV1DecContext *s = avctx->priv_data;
+    V4L2RequestContextAV1 *ctx = avctx->internal->hwaccel_priv_data;
+    V4L2RequestControlsAV1 *controls = s->cur_frame.hwaccel_picture_private;
+    int count = 0;
+
+    struct v4l2_ext_control control[V4L2_AV1_CONTROLS_MAX] = {};
+
+    control[count++] = (struct v4l2_ext_control) {
+        .id = V4L2_CID_STATELESS_AV1_SEQUENCE,
+        .ptr = &controls->sequence,
+        .size = sizeof(controls->sequence),
+    };
+
+    control[count++] = (struct v4l2_ext_control) {
+        .id = V4L2_CID_STATELESS_AV1_FRAME,
+        .ptr = &controls->frame,
+        .size = sizeof(controls->frame),
+    };
+
+    control[count++] = (struct v4l2_ext_control) {
+        .id = V4L2_CID_STATELESS_AV1_TILE_GROUP_ENTRY,
+        .ptr = controls->tile_group_entries,
+        .size = sizeof(*controls->tile_group_entries) *
+                FFMAX(controls->num_tile_group_entries, 1),
+    };
+
+    if (ctx->has_film_grain) {
+        control[count++] = (struct v4l2_ext_control) {
+            .id = V4L2_CID_STATELESS_AV1_FILM_GRAIN,
+            .ptr = &controls->film_grain,
+            .size = sizeof(controls->film_grain),
+        };
+    }
+
+    return ff_v4l2_request_decode_frame(avctx, &controls->pic, control, count);
+}
+
+static void v4l2_request_av1_free_frame_priv(AVRefStructOpaque hwctx, void *data)
+{
+    V4L2RequestControlsAV1 *controls = data;
+
+    if (controls->allocated_tile_group_entries)
+        av_freep(&controls->tile_group_entries);
+}
+
+static int v4l2_request_av1_post_frames_ctx(AVCodecContext *avctx)
+{
+    V4L2RequestContextAV1 *ctx = avctx->internal->hwaccel_priv_data;
+
+    struct v4l2_query_ext_ctrl film_grain = {
+        .id = V4L2_CID_STATELESS_AV1_FILM_GRAIN,
+    };
+
+    // TODO: check V4L2_CID_MPEG_VIDEO_AV1_PROFILE
+    // TODO: check V4L2_CID_MPEG_VIDEO_AV1_LEVEL
+
+    if (!ff_v4l2_request_query_control(avctx, &film_grain))
+        ctx->has_film_grain = true;
+    else
+        ctx->has_film_grain = false;
+
+    return 0;
+}
+
+static int v4l2_request_av1_init(AVCodecContext *avctx)
+{
+    const AV1DecContext *s = avctx->priv_data;
+    struct v4l2_ctrl_av1_sequence sequence;
+
+    struct v4l2_ext_control control[] = {
+        {
+            .id = V4L2_CID_STATELESS_AV1_SEQUENCE,
+            .ptr = &sequence,
+            .size = sizeof(sequence),
+        },
+    };
+
+    fill_sequence(&sequence, s);
+
+    return ff_v4l2_request_init(avctx, control, FF_ARRAY_ELEMS(control),
+                                v4l2_request_av1_post_frames_ctx);
+}
+
+static int v4l2_request_av1_frame_params(AVCodecContext *avctx,
+                                         AVBufferRef *hw_frames_ctx)
+{
+    const AV1DecContext *s = avctx->priv_data;
+    const AV1RawSequenceHeader *seq = s ? s->raw_seq : NULL;
+    uint8_t bit_depth = seq ? get_bit_depth_from_seq(seq) : 0;
+
+    return ff_v4l2_request_frame_params(avctx, hw_frames_ctx,
+                                        V4L2_PIX_FMT_AV1_FRAME, bit_depth);
+}
+
+const FFHWAccel ff_av1_v4l2request_hwaccel = {
+    .p.name             = "av1_v4l2request",
+    .p.type             = AVMEDIA_TYPE_VIDEO,
+    .p.id               = AV_CODEC_ID_AV1,
+    .p.pix_fmt          = AV_PIX_FMT_DRM_PRIME,
+    .start_frame        = v4l2_request_av1_start_frame,
+    .decode_slice       = v4l2_request_av1_decode_slice,
+    .end_frame          = v4l2_request_av1_end_frame,
+    .flush              = ff_v4l2_request_flush,
+    .free_frame_priv    = v4l2_request_av1_free_frame_priv,
+    .frame_priv_data_size = sizeof(V4L2RequestControlsAV1),
+    .init               = v4l2_request_av1_init,
+    .uninit             = ff_v4l2_request_uninit,
+    .priv_data_size     = sizeof(V4L2RequestContextAV1),
+    .frame_params       = v4l2_request_av1_frame_params,
+    .caps_internal      = HWACCEL_CAP_ASYNC_SAFE,
+};

thirdparty/ffmpeg/libavcodec/v4l2_request_h264.c

@@ -0,0 +1,532 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "config.h"
+
+#include "h264dec.h"
+#include "hwaccel_internal.h"
+#include "hwconfig.h"
+#include "internal.h"
+#include "v4l2_request.h"
+
+typedef struct V4L2RequestContextH264 {
+    V4L2RequestContext base;
+    enum v4l2_stateless_h264_decode_mode decode_mode;
+    enum v4l2_stateless_h264_start_code start_code;
+} V4L2RequestContextH264;
+
+typedef struct V4L2RequestControlsH264 {
+    V4L2RequestPictureContext pic;
+    struct v4l2_ctrl_h264_sps sps;
+    struct v4l2_ctrl_h264_pps pps;
+    struct v4l2_ctrl_h264_scaling_matrix scaling_matrix;
+    struct v4l2_ctrl_h264_decode_params decode_params;
+    struct v4l2_ctrl_h264_slice_params slice_params;
+    struct v4l2_ctrl_h264_pred_weights pred_weights;
+    bool pred_weights_required;
+    bool first_slice;
+    int num_slices;
+} V4L2RequestControlsH264;
+
+static uint8_t nalu_slice_start_code[] = { 0x00, 0x00, 0x01 };
+
+static void fill_weight_factors(struct v4l2_h264_weight_factors *weight_factors,
+                                int list, const H264SliceContext *sl)
+{
+    for (int i = 0; i < sl->ref_count[list]; i++) {
+        if (sl->pwt.luma_weight_flag[list]) {
+            weight_factors->luma_weight[i] = sl->pwt.luma_weight[i][list][0];
+            weight_factors->luma_offset[i] = sl->pwt.luma_weight[i][list][1];
+        } else {
+            weight_factors->luma_weight[i] = 1 << sl->pwt.luma_log2_weight_denom;
+            weight_factors->luma_offset[i] = 0;
+        }
+        for (int j = 0; j < 2; j++) {
+            if (sl->pwt.chroma_weight_flag[list]) {
+                weight_factors->chroma_weight[i][j] = sl->pwt.chroma_weight[i][list][j][0];
+                weight_factors->chroma_offset[i][j] = sl->pwt.chroma_weight[i][list][j][1];
+            } else {
+                weight_factors->chroma_weight[i][j] = 1 << sl->pwt.chroma_log2_weight_denom;
+                weight_factors->chroma_offset[i][j] = 0;
+            }
+        }
+    }
+}
+
+static void fill_dpb_entry(struct v4l2_h264_dpb_entry *entry,
+                           const H264Picture *pic, int long_idx)
+{
+    entry->reference_ts = ff_v4l2_request_get_capture_timestamp(pic->f);
+    entry->pic_num = pic->pic_id;
+    entry->frame_num = pic->long_ref ? long_idx : pic->frame_num;
+    entry->fields = pic->reference & V4L2_H264_FRAME_REF;
+    entry->flags = V4L2_H264_DPB_ENTRY_FLAG_VALID;
+    if (entry->fields)
+        entry->flags |= V4L2_H264_DPB_ENTRY_FLAG_ACTIVE;
+    if (pic->long_ref)
+        entry->flags |= V4L2_H264_DPB_ENTRY_FLAG_LONG_TERM;
+    if (pic->field_picture)
+        entry->flags |= V4L2_H264_DPB_ENTRY_FLAG_FIELD;
+    if (pic->field_poc[0] != INT_MAX)
+        entry->top_field_order_cnt = pic->field_poc[0];
+    if (pic->field_poc[1] != INT_MAX)
+        entry->bottom_field_order_cnt = pic->field_poc[1];
+}
+
+static void fill_dpb(struct v4l2_ctrl_h264_decode_params *decode_params,
+                     const H264Context *h)
+{
+    int entries = 0;
+
+    for (int i = 0; i < h->short_ref_count; i++) {
+        const H264Picture *pic = h->short_ref[i];
+        if (pic && (pic->field_poc[0] != INT_MAX || pic->field_poc[1] != INT_MAX))
+            fill_dpb_entry(&decode_params->dpb[entries++], pic, pic->pic_id);
+    }
+
+    if (!h->long_ref_count)
+        return;
+
+    for (int i = 0; i < FF_ARRAY_ELEMS(h->long_ref); i++) {
+        const H264Picture *pic = h->long_ref[i];
+        if (pic && (pic->field_poc[0] != INT_MAX || pic->field_poc[1] != INT_MAX))
+            fill_dpb_entry(&decode_params->dpb[entries++], pic, i);
+    }
+}
+
+static void fill_ref_list(struct v4l2_h264_reference *reference,
+                          struct v4l2_ctrl_h264_decode_params *decode_params,
+                          const H264Ref *ref)
+{
+    uint64_t timestamp;
+
+    if (!ref->parent)
+        return;
+
+    timestamp = ff_v4l2_request_get_capture_timestamp(ref->parent->f);
+
+    for (uint8_t i = 0; i < FF_ARRAY_ELEMS(decode_params->dpb); i++) {
+        struct v4l2_h264_dpb_entry *entry = &decode_params->dpb[i];
+        if ((entry->flags & V4L2_H264_DPB_ENTRY_FLAG_VALID) &&
+            entry->reference_ts == timestamp) {
+            reference->fields = ref->reference & V4L2_H264_FRAME_REF;
+            reference->index = i;
+            return;
+        }
+    }
+}
+
+static void fill_sps(struct v4l2_ctrl_h264_sps *ctrl, const H264Context *h)
+{
+    const SPS *sps = h->ps.sps;
+
+    *ctrl = (struct v4l2_ctrl_h264_sps) {
+        .profile_idc = sps->profile_idc,
+        .constraint_set_flags = sps->constraint_set_flags,
+        .level_idc = sps->level_idc,
+        .seq_parameter_set_id = sps->sps_id,
+        .chroma_format_idc = sps->chroma_format_idc,
+        .bit_depth_luma_minus8 = sps->bit_depth_luma - 8,
+        .bit_depth_chroma_minus8 = sps->bit_depth_chroma - 8,
+        .log2_max_frame_num_minus4 = sps->log2_max_frame_num - 4,
+        .pic_order_cnt_type = sps->poc_type,
+        .log2_max_pic_order_cnt_lsb_minus4 = sps->log2_max_poc_lsb - 4,
+        .max_num_ref_frames = sps->ref_frame_count,
+        .num_ref_frames_in_pic_order_cnt_cycle = sps->poc_cycle_length,
+        .offset_for_non_ref_pic = sps->offset_for_non_ref_pic,
+        .offset_for_top_to_bottom_field = sps->offset_for_top_to_bottom_field,
+        .pic_width_in_mbs_minus1 = h->mb_width - 1,
+        .pic_height_in_map_units_minus1 = sps->frame_mbs_only_flag ?
+                                          h->mb_height - 1 : h->mb_height / 2 - 1,
+    };
+
+    if (sps->poc_cycle_length > 0 && sps->poc_cycle_length <= 255)
+        memcpy(ctrl->offset_for_ref_frame, sps->offset_for_ref_frame,
+               sps->poc_cycle_length * sizeof(ctrl->offset_for_ref_frame[0]));
+
+    if (sps->residual_color_transform_flag)
+        ctrl->flags |= V4L2_H264_SPS_FLAG_SEPARATE_COLOUR_PLANE;
+
+    if (sps->transform_bypass)
+        ctrl->flags |= V4L2_H264_SPS_FLAG_QPPRIME_Y_ZERO_TRANSFORM_BYPASS;
+
+    if (sps->delta_pic_order_always_zero_flag)
+        ctrl->flags |= V4L2_H264_SPS_FLAG_DELTA_PIC_ORDER_ALWAYS_ZERO;
+
+    if (sps->gaps_in_frame_num_allowed_flag)
+        ctrl->flags |= V4L2_H264_SPS_FLAG_GAPS_IN_FRAME_NUM_VALUE_ALLOWED;
+
+    if (sps->frame_mbs_only_flag)
+        ctrl->flags |= V4L2_H264_SPS_FLAG_FRAME_MBS_ONLY;
+
+    if (sps->mb_aff)
+        ctrl->flags |= V4L2_H264_SPS_FLAG_MB_ADAPTIVE_FRAME_FIELD;
+
+    if (sps->direct_8x8_inference_flag)
+        ctrl->flags |= V4L2_H264_SPS_FLAG_DIRECT_8X8_INFERENCE;
+}
+
+static void fill_pps(struct v4l2_ctrl_h264_pps *ctrl, const H264Context *h)
+{
+    const SPS *sps = h->ps.sps;
+    const PPS *pps = h->ps.pps;
+    const H264SliceContext *sl = &h->slice_ctx[0];
+    int qp_bd_offset = 6 * (sps->bit_depth_luma - 8);
+
+    *ctrl = (struct v4l2_ctrl_h264_pps) {
+        .pic_parameter_set_id = sl->pps_id,
+        .seq_parameter_set_id = pps->sps_id,
+        .num_slice_groups_minus1 = pps->slice_group_count - 1,
+        .num_ref_idx_l0_default_active_minus1 = pps->ref_count[0] - 1,
+        .num_ref_idx_l1_default_active_minus1 = pps->ref_count[1] - 1,
+        .weighted_bipred_idc = pps->weighted_bipred_idc,
+        .pic_init_qp_minus26 = pps->init_qp - 26 - qp_bd_offset,
+        .pic_init_qs_minus26 = pps->init_qs - 26 - qp_bd_offset,
+        .chroma_qp_index_offset = pps->chroma_qp_index_offset[0],
+        .second_chroma_qp_index_offset = pps->chroma_qp_index_offset[1],
+    };
+
+    if (pps->cabac)
+        ctrl->flags |= V4L2_H264_PPS_FLAG_ENTROPY_CODING_MODE;
+
+    if (pps->pic_order_present)
+        ctrl->flags |= V4L2_H264_PPS_FLAG_BOTTOM_FIELD_PIC_ORDER_IN_FRAME_PRESENT;
+
+    if (pps->weighted_pred)
+        ctrl->flags |= V4L2_H264_PPS_FLAG_WEIGHTED_PRED;
+
+    if (pps->deblocking_filter_parameters_present)
+        ctrl->flags |= V4L2_H264_PPS_FLAG_DEBLOCKING_FILTER_CONTROL_PRESENT;
+
+    if (pps->constrained_intra_pred)
+        ctrl->flags |= V4L2_H264_PPS_FLAG_CONSTRAINED_INTRA_PRED;
+
+    if (pps->redundant_pic_cnt_present)
+        ctrl->flags |= V4L2_H264_PPS_FLAG_REDUNDANT_PIC_CNT_PRESENT;
+
+    if (pps->transform_8x8_mode)
+        ctrl->flags |= V4L2_H264_PPS_FLAG_TRANSFORM_8X8_MODE;
+
+    /* FFmpeg always provide a scaling matrix */
+    ctrl->flags |= V4L2_H264_PPS_FLAG_SCALING_MATRIX_PRESENT;
+}
+
+static int v4l2_request_h264_start_frame(AVCodecContext *avctx,
+                                         av_unused const AVBufferRef *buf_ref,
+                                         av_unused const uint8_t *buffer,
+                                         av_unused uint32_t size)
+{
+    const H264Context *h = avctx->priv_data;
+    const PPS *pps = h->ps.pps;
+    const SPS *sps = h->ps.sps;
+    const H264SliceContext *sl = &h->slice_ctx[0];
+    V4L2RequestControlsH264 *controls = h->cur_pic_ptr->hwaccel_picture_private;
+    int ret;
+
+    ret = ff_v4l2_request_start_frame(avctx, &controls->pic, h->cur_pic_ptr->f);
+    if (ret)
+        return ret;
+
+    fill_sps(&controls->sps, h);
+    fill_pps(&controls->pps, h);
+
+    memcpy(controls->scaling_matrix.scaling_list_4x4, pps->scaling_matrix4,
+           sizeof(controls->scaling_matrix.scaling_list_4x4));
+    memcpy(controls->scaling_matrix.scaling_list_8x8[0], pps->scaling_matrix8[0],
+           sizeof(controls->scaling_matrix.scaling_list_8x8[0]));
+    memcpy(controls->scaling_matrix.scaling_list_8x8[1], pps->scaling_matrix8[3],
+           sizeof(controls->scaling_matrix.scaling_list_8x8[1]));
+
+    if (sps->chroma_format_idc == 3) {
+        memcpy(controls->scaling_matrix.scaling_list_8x8[2], pps->scaling_matrix8[1],
+               sizeof(controls->scaling_matrix.scaling_list_8x8[2]));
+        memcpy(controls->scaling_matrix.scaling_list_8x8[3], pps->scaling_matrix8[4],
+               sizeof(controls->scaling_matrix.scaling_list_8x8[3]));
+        memcpy(controls->scaling_matrix.scaling_list_8x8[4], pps->scaling_matrix8[2],
+               sizeof(controls->scaling_matrix.scaling_list_8x8[4]));
+        memcpy(controls->scaling_matrix.scaling_list_8x8[5], pps->scaling_matrix8[5],
+               sizeof(controls->scaling_matrix.scaling_list_8x8[5]));
+    }
+
+    controls->decode_params = (struct v4l2_ctrl_h264_decode_params) {
+        .nal_ref_idc = h->nal_ref_idc,
+        .frame_num = h->poc.frame_num,
+        .top_field_order_cnt = h->cur_pic_ptr->field_poc[0] != INT_MAX ?
+                               h->cur_pic_ptr->field_poc[0] : 0,
+        .bottom_field_order_cnt = h->cur_pic_ptr->field_poc[1] != INT_MAX ?
+                                  h->cur_pic_ptr->field_poc[1] : 0,
+        .idr_pic_id = sl->idr_pic_id,
+        .pic_order_cnt_lsb = sl->poc_lsb,
+        .delta_pic_order_cnt_bottom = sl->delta_poc_bottom,
+        .delta_pic_order_cnt0 = sl->delta_poc[0],
+        .delta_pic_order_cnt1 = sl->delta_poc[1],
+        /* Size in bits of dec_ref_pic_marking() syntax element. */
+        .dec_ref_pic_marking_bit_size = sl->ref_pic_marking_bit_size,
+        /* Size in bits of pic order count syntax. */
+        .pic_order_cnt_bit_size = sl->pic_order_cnt_bit_size,
+        .slice_group_change_cycle = 0, /* slice group not supported by FFmpeg */
+    };
+
+    if (h->picture_idr)
+        controls->decode_params.flags |= V4L2_H264_DECODE_PARAM_FLAG_IDR_PIC;
+
+    if (FIELD_PICTURE(h))
+        controls->decode_params.flags |= V4L2_H264_DECODE_PARAM_FLAG_FIELD_PIC;
+
+    if (h->picture_structure == PICT_BOTTOM_FIELD)
+        controls->decode_params.flags |= V4L2_H264_DECODE_PARAM_FLAG_BOTTOM_FIELD;
+
+#if defined(V4L2_H264_DECODE_PARAM_FLAG_PFRAME)
+    if (sl->slice_type_nos == AV_PICTURE_TYPE_P)
+        controls->decode_params.flags |= V4L2_H264_DECODE_PARAM_FLAG_PFRAME;
+#endif
+
+#if defined(V4L2_H264_DECODE_PARAM_FLAG_BFRAME)
+    if (sl->slice_type_nos == AV_PICTURE_TYPE_B)
+        controls->decode_params.flags |= V4L2_H264_DECODE_PARAM_FLAG_BFRAME;
+#endif
+
+    fill_dpb(&controls->decode_params, h);
+
+    controls->first_slice = true;
+    controls->num_slices = 0;
+
+    return 0;
+}
+
+static int v4l2_request_h264_queue_decode(AVCodecContext *avctx, bool last_slice)
+{
+    const H264Context *h = avctx->priv_data;
+    V4L2RequestContextH264 *ctx = avctx->internal->hwaccel_priv_data;
+    V4L2RequestControlsH264 *controls = h->cur_pic_ptr->hwaccel_picture_private;
+
+    struct v4l2_ext_control control[] = {
+        {
+            .id = V4L2_CID_STATELESS_H264_SPS,
+            .ptr = &controls->sps,
+            .size = sizeof(controls->sps),
+        },
+        {
+            .id = V4L2_CID_STATELESS_H264_PPS,
+            .ptr = &controls->pps,
+            .size = sizeof(controls->pps),
+        },
+        {
+            .id = V4L2_CID_STATELESS_H264_SCALING_MATRIX,
+            .ptr = &controls->scaling_matrix,
+            .size = sizeof(controls->scaling_matrix),
+        },
+        {
+            .id = V4L2_CID_STATELESS_H264_DECODE_PARAMS,
+            .ptr = &controls->decode_params,
+            .size = sizeof(controls->decode_params),
+        },
+        {
+            .id = V4L2_CID_STATELESS_H264_SLICE_PARAMS,
+            .ptr = &controls->slice_params,
+            .size = sizeof(controls->slice_params),
+        },
+        {
+            .id = V4L2_CID_STATELESS_H264_PRED_WEIGHTS,
+            .ptr = &controls->pred_weights,
+            .size = sizeof(controls->pred_weights),
+        },
+    };
+
+    if (ctx->decode_mode == V4L2_STATELESS_H264_DECODE_MODE_SLICE_BASED) {
+        int count = FF_ARRAY_ELEMS(control) - (controls->pred_weights_required ? 0 : 1);
+        return ff_v4l2_request_decode_slice(avctx, &controls->pic, control, count,
+                                            controls->first_slice, last_slice);
+    }
+
+    return ff_v4l2_request_decode_frame(avctx, &controls->pic,
+                                        control, FF_ARRAY_ELEMS(control) - 2);
+}
+
+static int v4l2_request_h264_decode_slice(AVCodecContext *avctx,
+                                          const uint8_t *buffer, uint32_t size)
+{
+    const H264Context *h = avctx->priv_data;
+    const PPS *pps = h->ps.pps;
+    const H264SliceContext *sl = &h->slice_ctx[0];
+    V4L2RequestContextH264 *ctx = avctx->internal->hwaccel_priv_data;
+    V4L2RequestControlsH264 *controls = h->cur_pic_ptr->hwaccel_picture_private;
+    int i, ret, count;
+
+    if (ctx->decode_mode == V4L2_STATELESS_H264_DECODE_MODE_SLICE_BASED &&
+        controls->num_slices) {
+        ret = v4l2_request_h264_queue_decode(avctx, false);
+        if (ret)
+            return ret;
+
+        ff_v4l2_request_reset_picture(avctx, &controls->pic);
+        controls->first_slice = 0;
+    }
+
+    if (ctx->start_code == V4L2_STATELESS_H264_START_CODE_ANNEX_B) {
+        ret = ff_v4l2_request_append_output(avctx, &controls->pic,
+                                            nalu_slice_start_code, 3);
+        if (ret)
+            return ret;
+    }
+
+    ret = ff_v4l2_request_append_output(avctx, &controls->pic, buffer, size);
+    if (ret)
+        return ret;
+
+    if (ctx->decode_mode != V4L2_STATELESS_H264_DECODE_MODE_SLICE_BASED)
+        return 0;
+
+    controls->slice_params = (struct v4l2_ctrl_h264_slice_params) {
+        /* Offset in bits to slice_data() from the beginning of this slice. */
+        .header_bit_size = get_bits_count(&sl->gb),
+
+        .first_mb_in_slice = sl->first_mb_addr,
+
+        .slice_type = ff_h264_get_slice_type(sl),
+        .colour_plane_id = 0, /* separate colour plane not supported by FFmpeg */
+        .redundant_pic_cnt = sl->redundant_pic_count,
+        .cabac_init_idc = sl->cabac_init_idc,
+        .slice_qp_delta = sl->qscale - pps->init_qp,
+        .slice_qs_delta = 0, /* not implemented by FFmpeg */
+        .disable_deblocking_filter_idc = sl->deblocking_filter < 2 ?
+                                         !sl->deblocking_filter :
+                                         sl->deblocking_filter,
+        .slice_alpha_c0_offset_div2 = sl->slice_alpha_c0_offset / 2,
+        .slice_beta_offset_div2 = sl->slice_beta_offset / 2,
+        .num_ref_idx_l0_active_minus1 = sl->list_count > 0 ? sl->ref_count[0] - 1 : 0,
+        .num_ref_idx_l1_active_minus1 = sl->list_count > 1 ? sl->ref_count[1] - 1 : 0,
+    };
+
+    if (sl->slice_type == AV_PICTURE_TYPE_B && sl->direct_spatial_mv_pred)
+        controls->slice_params.flags |= V4L2_H264_SLICE_FLAG_DIRECT_SPATIAL_MV_PRED;
+
+    /* V4L2_H264_SLICE_FLAG_SP_FOR_SWITCH: not implemented by FFmpeg */
+
+    controls->pred_weights_required =
+        V4L2_H264_CTRL_PRED_WEIGHTS_REQUIRED(&controls->pps, &controls->slice_params);
+    if (controls->pred_weights_required) {
+        controls->pred_weights.chroma_log2_weight_denom = sl->pwt.chroma_log2_weight_denom;
+        controls->pred_weights.luma_log2_weight_denom = sl->pwt.luma_log2_weight_denom;
+    }
+
+    count = sl->list_count > 0 ? sl->ref_count[0] : 0;
+    for (i = 0; i < count; i++)
+        fill_ref_list(&controls->slice_params.ref_pic_list0[i],
+                      &controls->decode_params, &sl->ref_list[0][i]);
+    if (count && controls->pred_weights_required)
+        fill_weight_factors(&controls->pred_weights.weight_factors[0], 0, sl);
+
+    count = sl->list_count > 1 ? sl->ref_count[1] : 0;
+    for (i = 0; i < count; i++)
+        fill_ref_list(&controls->slice_params.ref_pic_list1[i],
+                      &controls->decode_params, &sl->ref_list[1][i]);
+    if (count && controls->pred_weights_required)
+        fill_weight_factors(&controls->pred_weights.weight_factors[1], 1, sl);
+
+    controls->num_slices++;
+    return 0;
+}
+
+static int v4l2_request_h264_end_frame(AVCodecContext *avctx)
+{
+    return v4l2_request_h264_queue_decode(avctx, true);
+}
+
+static int v4l2_request_h264_post_frames_ctx(AVCodecContext *avctx)
+{
+    V4L2RequestContextH264 *ctx = avctx->internal->hwaccel_priv_data;
+
+    struct v4l2_ext_control control[] = {
+        { .id = V4L2_CID_STATELESS_H264_DECODE_MODE, },
+        { .id = V4L2_CID_STATELESS_H264_START_CODE, },
+    };
+
+    ctx->decode_mode = ff_v4l2_request_query_control_default_value(avctx,
+                                            V4L2_CID_STATELESS_H264_DECODE_MODE);
+    if (ctx->decode_mode != V4L2_STATELESS_H264_DECODE_MODE_SLICE_BASED &&
+        ctx->decode_mode != V4L2_STATELESS_H264_DECODE_MODE_FRAME_BASED) {
+        av_log(ctx, AV_LOG_VERBOSE, "Unsupported decode mode: %d\n",
+               ctx->decode_mode);
+        return AVERROR(EINVAL);
+    }
+
+    ctx->start_code = ff_v4l2_request_query_control_default_value(avctx,
+                                            V4L2_CID_STATELESS_H264_START_CODE);
+    if (ctx->start_code != V4L2_STATELESS_H264_START_CODE_NONE &&
+        ctx->start_code != V4L2_STATELESS_H264_START_CODE_ANNEX_B) {
+        av_log(ctx, AV_LOG_VERBOSE, "Unsupported start code: %d\n",
+               ctx->start_code);
+        return AVERROR(EINVAL);
+    }
+
+    // TODO: check V4L2_CID_MPEG_VIDEO_H264_PROFILE control
+    // TODO: check V4L2_CID_MPEG_VIDEO_H264_LEVEL control
+
+    control[0].value = ctx->decode_mode;
+    control[1].value = ctx->start_code;
+
+    return ff_v4l2_request_set_controls(avctx, control, FF_ARRAY_ELEMS(control));
+}
+
+static int v4l2_request_h264_init(AVCodecContext *avctx)
+{
+    const H264Context *h = avctx->priv_data;
+    struct v4l2_ctrl_h264_sps sps;
+
+    struct v4l2_ext_control control[] = {
+        {
+            .id = V4L2_CID_STATELESS_H264_SPS,
+            .ptr = &sps,
+            .size = sizeof(sps),
+        },
+    };
+
+    fill_sps(&sps, h);
+
+    return ff_v4l2_request_init(avctx, control, FF_ARRAY_ELEMS(control),
+                                v4l2_request_h264_post_frames_ctx);
+}
+
+static int v4l2_request_h264_frame_params(AVCodecContext *avctx,
+                                          AVBufferRef *hw_frames_ctx)
+{
+    const H264Context *h = avctx->priv_data;
+    const SPS *sps = h ? h->ps.sps : NULL;
+    uint8_t bit_depth = sps ? sps->bit_depth_luma : 0;
+
+    return ff_v4l2_request_frame_params(avctx, hw_frames_ctx,
+                                        V4L2_PIX_FMT_H264_SLICE, bit_depth);
+}
+
+const FFHWAccel ff_h264_v4l2request_hwaccel = {
+    .p.name             = "h264_v4l2request",
+    .p.type             = AVMEDIA_TYPE_VIDEO,
+    .p.id               = AV_CODEC_ID_H264,
+    .p.pix_fmt          = AV_PIX_FMT_DRM_PRIME,
+    .start_frame        = v4l2_request_h264_start_frame,
+    .decode_slice       = v4l2_request_h264_decode_slice,
+    .end_frame          = v4l2_request_h264_end_frame,
+    .flush              = ff_v4l2_request_flush,
+    .frame_priv_data_size = sizeof(V4L2RequestControlsH264),
+    .init               = v4l2_request_h264_init,
+    .uninit             = ff_v4l2_request_uninit,
+    .priv_data_size     = sizeof(V4L2RequestContextH264),
+    .frame_params       = v4l2_request_h264_frame_params,
+    .caps_internal      = HWACCEL_CAP_ASYNC_SAFE,
+};

thirdparty/ffmpeg/libavcodec/v4l2_request_hevc.c

@@ -0,0 +1,752 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "config.h"
+
+#include "libavutil/mem.h"
+#include "hevc/hevcdec.h"
+#include "hwaccel_internal.h"
+#include "hwconfig.h"
+#include "internal.h"
+#include "v4l2_request.h"
+
+#define V4L2_HEVC_CONTROLS_MAX 6
+
+typedef struct V4L2RequestContextHEVC {
+    V4L2RequestContext base;
+    enum v4l2_stateless_hevc_decode_mode decode_mode;
+    enum v4l2_stateless_hevc_start_code start_code;
+    unsigned int max_slice_params;
+    unsigned int max_entry_point_offsets;
+    bool has_scaling_matrix;
+} V4L2RequestContextHEVC;
+
+typedef struct V4L2RequestControlsHEVC {
+    V4L2RequestPictureContext pic;
+    struct v4l2_ctrl_hevc_sps sps;
+    struct v4l2_ctrl_hevc_pps pps;
+    struct v4l2_ctrl_hevc_decode_params decode_params;
+    struct v4l2_ctrl_hevc_scaling_matrix scaling_matrix;
+    struct v4l2_ctrl_hevc_slice_params slice_params;
+    struct v4l2_ctrl_hevc_slice_params *frame_slice_params;
+    unsigned int allocated_slice_params;
+    unsigned int num_slice_params;
+    uint32_t *entry_point_offsets;
+    unsigned int allocated_entry_point_offsets;
+    unsigned int num_entry_point_offsets;
+    bool first_slice;
+} V4L2RequestControlsHEVC;
+
+static uint8_t nalu_slice_start_code[] = { 0x00, 0x00, 0x01 };
+
+static void fill_pred_weight_table(struct v4l2_hevc_pred_weight_table *table,
+                                   const HEVCContext *h)
+{
+    int32_t luma_weight_denom, chroma_weight_denom;
+    const SliceHeader *sh = &h->sh;
+
+    if (sh->slice_type == HEVC_SLICE_I ||
+        (sh->slice_type == HEVC_SLICE_P && !h->pps->weighted_pred_flag) ||
+        (sh->slice_type == HEVC_SLICE_B && !h->pps->weighted_bipred_flag))
+        return;
+
+    table->luma_log2_weight_denom = sh->luma_log2_weight_denom;
+
+    if (h->pps->sps->chroma_format_idc)
+        table->delta_chroma_log2_weight_denom = sh->chroma_log2_weight_denom -
+                                                sh->luma_log2_weight_denom;
+
+    luma_weight_denom = (1 << sh->luma_log2_weight_denom);
+    chroma_weight_denom = (1 << sh->chroma_log2_weight_denom);
+
+    for (int i = 0; i < 15 && i < sh->nb_refs[L0]; i++) {
+        table->delta_luma_weight_l0[i] = sh->luma_weight_l0[i] - luma_weight_denom;
+        table->luma_offset_l0[i] = sh->luma_offset_l0[i];
+        table->delta_chroma_weight_l0[i][0] = sh->chroma_weight_l0[i][0] - chroma_weight_denom;
+        table->delta_chroma_weight_l0[i][1] = sh->chroma_weight_l0[i][1] - chroma_weight_denom;
+        table->chroma_offset_l0[i][0] = sh->chroma_offset_l0[i][0];
+        table->chroma_offset_l0[i][1] = sh->chroma_offset_l0[i][1];
+    }
+
+    if (sh->slice_type != HEVC_SLICE_B)
+        return;
+
+    for (int i = 0; i < 15 && i < sh->nb_refs[L1]; i++) {
+        table->delta_luma_weight_l1[i] = sh->luma_weight_l1[i] - luma_weight_denom;
+        table->luma_offset_l1[i] = sh->luma_offset_l1[i];
+        table->delta_chroma_weight_l1[i][0] = sh->chroma_weight_l1[i][0] - chroma_weight_denom;
+        table->delta_chroma_weight_l1[i][1] = sh->chroma_weight_l1[i][1] - chroma_weight_denom;
+        table->chroma_offset_l1[i][0] = sh->chroma_offset_l1[i][0];
+        table->chroma_offset_l1[i][1] = sh->chroma_offset_l1[i][1];
+    }
+}
+
+static uint8_t get_ref_pic_index(const HEVCContext *h, const HEVCFrame *frame,
+                                 struct v4l2_ctrl_hevc_decode_params *decode_params)
+{
+    uint64_t timestamp;
+
+    if (!frame || !frame->f)
+        return 0;
+
+    timestamp = ff_v4l2_request_get_capture_timestamp(frame->f);
+
+    for (uint8_t i = 0; i < decode_params->num_active_dpb_entries; i++) {
+        struct v4l2_hevc_dpb_entry *entry = &decode_params->dpb[i];
+        if (entry->timestamp == timestamp)
+            return i;
+    }
+
+    return 0;
+}
+
+static void fill_decode_params(struct v4l2_ctrl_hevc_decode_params *decode_params,
+                               const HEVCContext *h)
+{
+    const HEVCFrame *pic = h->cur_frame;
+    const HEVCLayerContext *l = &h->layers[h->cur_layer];
+    const SliceHeader *sh = &h->sh;
+    int i, entries = 0;
+
+    *decode_params = (struct v4l2_ctrl_hevc_decode_params) {
+        .pic_order_cnt_val = h->poc,
+        .short_term_ref_pic_set_size = sh->short_term_ref_pic_set_size,
+        .long_term_ref_pic_set_size = sh->long_term_ref_pic_set_size,
+        .num_poc_st_curr_before = h->rps[ST_CURR_BEF].nb_refs,
+        .num_poc_st_curr_after = h->rps[ST_CURR_AFT].nb_refs,
+        .num_poc_lt_curr = h->rps[LT_CURR].nb_refs,
+    };
+
+#if HAVE_STRUCT_V4L2_CTRL_HEVC_DECODE_PARAMS_NUM_DELTA_POCS_OF_REF_RPS_IDX
+    if (h->sh.short_term_ref_pic_set_sps_flag == 0 && h->sh.short_term_rps)
+        decode_params->num_delta_pocs_of_ref_rps_idx =
+                                h->sh.short_term_rps->rps_idx_num_delta_pocs;
+#endif
+
+    for (i = 0; i < FF_ARRAY_ELEMS(l->DPB); i++) {
+        const HEVCFrame *frame = &l->DPB[i];
+        if (frame != pic &&
+            (frame->flags & (HEVC_FRAME_FLAG_LONG_REF | HEVC_FRAME_FLAG_SHORT_REF))) {
+            struct v4l2_hevc_dpb_entry *entry = &decode_params->dpb[entries++];
+
+            entry->timestamp = ff_v4l2_request_get_capture_timestamp(frame->f);
+            entry->field_pic = !!(frame->f->flags & AV_FRAME_FLAG_INTERLACED);
+            entry->flags = 0;
+            if (frame->flags & HEVC_FRAME_FLAG_LONG_REF)
+                entry->flags |= V4L2_HEVC_DPB_ENTRY_LONG_TERM_REFERENCE;
+
+            entry->pic_order_cnt_val = frame->poc;
+        }
+    }
+
+    decode_params->num_active_dpb_entries = entries;
+
+    if (IS_IRAP(h))
+        decode_params->flags |= V4L2_HEVC_DECODE_PARAM_FLAG_IRAP_PIC;
+
+    if (IS_IDR(h))
+        decode_params->flags |= V4L2_HEVC_DECODE_PARAM_FLAG_IDR_PIC;
+
+    if (sh->no_output_of_prior_pics_flag)
+        decode_params->flags |= V4L2_HEVC_DECODE_PARAM_FLAG_NO_OUTPUT_OF_PRIOR;
+
+    for (i = 0; i < V4L2_HEVC_DPB_ENTRIES_NUM_MAX; i++) {
+        decode_params->poc_st_curr_before[i] =
+            get_ref_pic_index(h, h->rps[ST_CURR_BEF].ref[i], decode_params);
+        decode_params->poc_st_curr_after[i] =
+            get_ref_pic_index(h, h->rps[ST_CURR_AFT].ref[i], decode_params);
+        decode_params->poc_lt_curr[i] =
+            get_ref_pic_index(h, h->rps[LT_CURR].ref[i], decode_params);
+    }
+}
+
+static int fill_slice_params(V4L2RequestControlsHEVC *controls, int slice,
+                             uint32_t size, bool max_entry_point_offsets,
+                             const HEVCContext *h)
+{
+    struct v4l2_ctrl_hevc_slice_params *slice_params = &controls->frame_slice_params[slice];
+    struct v4l2_ctrl_hevc_decode_params *decode_params = &controls->decode_params;
+    const SliceHeader *sh = &h->sh;
+    RefPicList *rpl;
+    int i, offsets;
+
+    *slice_params = (struct v4l2_ctrl_hevc_slice_params) {
+        .bit_size = (size - sh->data_offset) * 8,
+        .data_byte_offset = controls->pic.output->bytesused + sh->data_offset,
+        .num_entry_point_offsets = sh->num_entry_point_offsets,
+
+        /* ISO/IEC 23008-2, ITU-T Rec. H.265: NAL unit header */
+        .nal_unit_type = h->nal_unit_type,
+        .nuh_temporal_id_plus1 = h->temporal_id + 1,
+
+        /* ISO/IEC 23008-2, ITU-T Rec. H.265: General slice segment header */
+        .slice_type = sh->slice_type,
+        .colour_plane_id = sh->colour_plane_id,
+        .slice_pic_order_cnt = sh->poc,
+        .num_ref_idx_l0_active_minus1 = sh->nb_refs[L0] ? sh->nb_refs[L0] - 1 : 0,
+        .num_ref_idx_l1_active_minus1 = sh->nb_refs[L1] ? sh->nb_refs[L1] - 1 : 0,
+        .collocated_ref_idx = sh->slice_temporal_mvp_enabled_flag ?
+                              sh->collocated_ref_idx : 0,
+        .five_minus_max_num_merge_cand = sh->slice_type == HEVC_SLICE_I ?
+                                         0 : 5 - sh->max_num_merge_cand,
+        .slice_qp_delta = sh->slice_qp_delta,
+        .slice_cb_qp_offset = sh->slice_cb_qp_offset,
+        .slice_cr_qp_offset = sh->slice_cr_qp_offset,
+        .slice_act_y_qp_offset = 0,
+        .slice_act_cb_qp_offset = 0,
+        .slice_act_cr_qp_offset = 0,
+        .slice_beta_offset_div2 = sh->beta_offset / 2,
+        .slice_tc_offset_div2 = sh->tc_offset / 2,
+
+        /* ISO/IEC 23008-2, ITU-T Rec. H.265: Picture timing SEI message */
+        .pic_struct = h->sei.picture_timing.picture_struct,
+
+        /* ISO/IEC 23008-2, ITU-T Rec. H.265: General slice segment header */
+        .slice_segment_addr = sh->slice_segment_addr,
+        .short_term_ref_pic_set_size = sh->short_term_ref_pic_set_size,
+        .long_term_ref_pic_set_size = sh->long_term_ref_pic_set_size,
+    };
+
+    if (h->pps->pps_slice_act_qp_offsets_present_flag) {
+        slice_params->slice_act_y_qp_offset = sh->slice_act_y_qp_offset;
+        slice_params->slice_act_cb_qp_offset = sh->slice_act_cb_qp_offset;
+        slice_params->slice_act_cr_qp_offset = sh->slice_act_cr_qp_offset;
+    }
+
+    if (sh->slice_sample_adaptive_offset_flag[0])
+        slice_params->flags |= V4L2_HEVC_SLICE_PARAMS_FLAG_SLICE_SAO_LUMA;
+
+    if (sh->slice_sample_adaptive_offset_flag[1])
+        slice_params->flags |= V4L2_HEVC_SLICE_PARAMS_FLAG_SLICE_SAO_CHROMA;
+
+    if (sh->slice_temporal_mvp_enabled_flag)
+        slice_params->flags |= V4L2_HEVC_SLICE_PARAMS_FLAG_SLICE_TEMPORAL_MVP_ENABLED;
+
+    if (sh->mvd_l1_zero_flag)
+        slice_params->flags |= V4L2_HEVC_SLICE_PARAMS_FLAG_MVD_L1_ZERO;
+
+    if (sh->cabac_init_flag)
+        slice_params->flags |= V4L2_HEVC_SLICE_PARAMS_FLAG_CABAC_INIT;
+
+    if (sh->collocated_list == L0)
+        slice_params->flags |= V4L2_HEVC_SLICE_PARAMS_FLAG_COLLOCATED_FROM_L0;
+
+    if (sh->use_integer_mv_flag)
+        slice_params->flags |= V4L2_HEVC_SLICE_PARAMS_FLAG_USE_INTEGER_MV;
+
+    if (sh->disable_deblocking_filter_flag)
+        slice_params->flags |= V4L2_HEVC_SLICE_PARAMS_FLAG_SLICE_DEBLOCKING_FILTER_DISABLED;
+
+    if (sh->slice_loop_filter_across_slices_enabled_flag)
+        slice_params->flags |= V4L2_HEVC_SLICE_PARAMS_FLAG_SLICE_LOOP_FILTER_ACROSS_SLICES_ENABLED;
+
+    if (sh->dependent_slice_segment_flag)
+        slice_params->flags |= V4L2_HEVC_SLICE_PARAMS_FLAG_DEPENDENT_SLICE_SEGMENT;
+
+    if (sh->slice_type != HEVC_SLICE_I) {
+        rpl = &h->cur_frame->refPicList[0];
+        for (i = 0; i < rpl->nb_refs; i++)
+            slice_params->ref_idx_l0[i] = get_ref_pic_index(h, rpl->ref[i], decode_params);
+    }
+
+    if (sh->slice_type == HEVC_SLICE_B) {
+        rpl = &h->cur_frame->refPicList[1];
+        for (i = 0; i < rpl->nb_refs; i++)
+            slice_params->ref_idx_l1[i] = get_ref_pic_index(h, rpl->ref[i], decode_params);
+    }
+
+    fill_pred_weight_table(&slice_params->pred_weight_table, h);
+
+    if (!max_entry_point_offsets)
+        return 0;
+
+    if (controls->allocated_entry_point_offsets < controls->num_entry_point_offsets + sh->num_entry_point_offsets) {
+        void *entry_point_offsets = controls->entry_point_offsets;
+        offsets = controls->allocated_entry_point_offsets == 0 ? 128 : controls->allocated_entry_point_offsets * 2;
+        while (controls->num_entry_point_offsets + sh->num_entry_point_offsets > offsets)
+            offsets *= 2;
+        entry_point_offsets = av_realloc_array(entry_point_offsets, offsets, sizeof(*controls->entry_point_offsets));
+        if (!entry_point_offsets)
+            return AVERROR(ENOMEM);
+        controls->entry_point_offsets = entry_point_offsets;
+        controls->allocated_entry_point_offsets = offsets;
+    }
+
+    for (i = 0, offsets = controls->num_entry_point_offsets; i < sh->num_entry_point_offsets; i++)
+        controls->entry_point_offsets[offsets + i] = sh->entry_point_offset[i];
+    controls->num_entry_point_offsets += sh->num_entry_point_offsets;
+
+    return 0;
+}
+
+static void fill_sps(struct v4l2_ctrl_hevc_sps *ctrl, const HEVCContext *h)
+{
+    const HEVCPPS *pps = h->pps;
+    const HEVCSPS *sps = pps->sps;
+
+    /* ISO/IEC 23008-2, ITU-T Rec. H.265: Sequence parameter set */
+    *ctrl = (struct v4l2_ctrl_hevc_sps) {
+        .video_parameter_set_id = sps->vps_id,
+        .seq_parameter_set_id = pps->sps_id,
+        .pic_width_in_luma_samples = sps->width,
+        .pic_height_in_luma_samples = sps->height,
+        .bit_depth_luma_minus8 = sps->bit_depth - 8,
+        .bit_depth_chroma_minus8 = sps->bit_depth_chroma - 8,
+        .log2_max_pic_order_cnt_lsb_minus4 = sps->log2_max_poc_lsb - 4,
+        .sps_max_dec_pic_buffering_minus1 =
+            sps->temporal_layer[sps->max_sub_layers - 1].max_dec_pic_buffering - 1,
+        .sps_max_num_reorder_pics =
+            sps->temporal_layer[sps->max_sub_layers - 1].num_reorder_pics,
+        .sps_max_latency_increase_plus1 =
+            sps->temporal_layer[sps->max_sub_layers - 1].max_latency_increase + 1,
+        .log2_min_luma_coding_block_size_minus3 = sps->log2_min_cb_size - 3,
+        .log2_diff_max_min_luma_coding_block_size =
+            sps->log2_diff_max_min_coding_block_size,
+        .log2_min_luma_transform_block_size_minus2 = sps->log2_min_tb_size - 2,
+        .log2_diff_max_min_luma_transform_block_size =
+            sps->log2_max_trafo_size - sps->log2_min_tb_size,
+        .max_transform_hierarchy_depth_inter = sps->max_transform_hierarchy_depth_inter,
+        .max_transform_hierarchy_depth_intra = sps->max_transform_hierarchy_depth_intra,
+        .pcm_sample_bit_depth_luma_minus1 = sps->pcm.bit_depth - 1,
+        .pcm_sample_bit_depth_chroma_minus1 = sps->pcm.bit_depth_chroma - 1,
+        .log2_min_pcm_luma_coding_block_size_minus3 = sps->pcm.log2_min_pcm_cb_size - 3,
+        .log2_diff_max_min_pcm_luma_coding_block_size =
+            sps->pcm.log2_max_pcm_cb_size - sps->pcm.log2_min_pcm_cb_size,
+        .num_short_term_ref_pic_sets = sps->nb_st_rps,
+        .num_long_term_ref_pics_sps = sps->num_long_term_ref_pics_sps,
+        .chroma_format_idc = sps->chroma_format_idc,
+        .sps_max_sub_layers_minus1 = sps->max_sub_layers - 1,
+    };
+
+    if (sps->separate_colour_plane)
+        ctrl->flags |= V4L2_HEVC_SPS_FLAG_SEPARATE_COLOUR_PLANE;
+
+    if (sps->scaling_list_enabled)
+        ctrl->flags |= V4L2_HEVC_SPS_FLAG_SCALING_LIST_ENABLED;
+
+    if (sps->amp_enabled)
+        ctrl->flags |= V4L2_HEVC_SPS_FLAG_AMP_ENABLED;
+
+    if (sps->sao_enabled)
+        ctrl->flags |= V4L2_HEVC_SPS_FLAG_SAMPLE_ADAPTIVE_OFFSET;
+
+    if (sps->pcm_enabled)
+        ctrl->flags |= V4L2_HEVC_SPS_FLAG_PCM_ENABLED;
+
+    if (sps->pcm_loop_filter_disabled)
+        ctrl->flags |= V4L2_HEVC_SPS_FLAG_PCM_LOOP_FILTER_DISABLED;
+
+    if (sps->long_term_ref_pics_present)
+        ctrl->flags |= V4L2_HEVC_SPS_FLAG_LONG_TERM_REF_PICS_PRESENT;
+
+    if (sps->temporal_mvp_enabled)
+        ctrl->flags |= V4L2_HEVC_SPS_FLAG_SPS_TEMPORAL_MVP_ENABLED;
+
+    if (sps->strong_intra_smoothing_enabled)
+        ctrl->flags |= V4L2_HEVC_SPS_FLAG_STRONG_INTRA_SMOOTHING_ENABLED;
+}
+
+static int v4l2_request_hevc_start_frame(AVCodecContext *avctx,
+                                         av_unused const AVBufferRef *buf_ref,
+                                         av_unused const uint8_t *buffer,
+                                         av_unused uint32_t size)
+{
+    const HEVCContext *h = avctx->priv_data;
+    const HEVCPPS *pps = h->pps;
+    const HEVCSPS *sps = pps->sps;
+    V4L2RequestContextHEVC *ctx = avctx->internal->hwaccel_priv_data;
+    V4L2RequestControlsHEVC *controls = h->cur_frame->hwaccel_picture_private;
+    const SliceHeader *sh = &h->sh;
+    int ret;
+
+    ret = ff_v4l2_request_start_frame(avctx, &controls->pic, h->cur_frame->f);
+    if (ret)
+        return ret;
+
+    fill_sps(&controls->sps, h);
+    fill_decode_params(&controls->decode_params, h);
+
+    if (ctx->has_scaling_matrix) {
+        const ScalingList *sl = pps->scaling_list_data_present_flag ?
+                                &pps->scaling_list :
+                                sps->scaling_list_enabled ?
+                                &sps->scaling_list : NULL;
+        if (sl) {
+            for (int i = 0; i < 6; i++) {
+                for (int j = 0; j < 16; j++)
+                    controls->scaling_matrix.scaling_list_4x4[i][j] = sl->sl[0][i][j];
+                for (int j = 0; j < 64; j++) {
+                    controls->scaling_matrix.scaling_list_8x8[i][j]   = sl->sl[1][i][j];
+                    controls->scaling_matrix.scaling_list_16x16[i][j] = sl->sl[2][i][j];
+                    if (i < 2)
+                        controls->scaling_matrix.scaling_list_32x32[i][j] = sl->sl[3][i * 3][j];
+                }
+                controls->scaling_matrix.scaling_list_dc_coef_16x16[i] = sl->sl_dc[0][i];
+                if (i < 2)
+                    controls->scaling_matrix.scaling_list_dc_coef_32x32[i] = sl->sl_dc[1][i * 3];
+            }
+        }
+    }
+
+    /* ISO/IEC 23008-2, ITU-T Rec. H.265: Picture parameter set */
+    controls->pps = (struct v4l2_ctrl_hevc_pps) {
+        .pic_parameter_set_id = sh->pps_id,
+        .num_extra_slice_header_bits = pps->num_extra_slice_header_bits,
+        .num_ref_idx_l0_default_active_minus1 = pps->num_ref_idx_l0_default_active - 1,
+        .num_ref_idx_l1_default_active_minus1 = pps->num_ref_idx_l1_default_active - 1,
+        .init_qp_minus26 = pps->pic_init_qp_minus26,
+        .diff_cu_qp_delta_depth = pps->diff_cu_qp_delta_depth,
+        .pps_cb_qp_offset = pps->cb_qp_offset,
+        .pps_cr_qp_offset = pps->cr_qp_offset,
+        .pps_beta_offset_div2 = pps->beta_offset / 2,
+        .pps_tc_offset_div2 = pps->tc_offset / 2,
+        .log2_parallel_merge_level_minus2 = pps->log2_parallel_merge_level - 2,
+    };
+
+    if (pps->dependent_slice_segments_enabled_flag)
+        controls->pps.flags |= V4L2_HEVC_PPS_FLAG_DEPENDENT_SLICE_SEGMENT_ENABLED;
+
+    if (pps->output_flag_present_flag)
+        controls->pps.flags |= V4L2_HEVC_PPS_FLAG_OUTPUT_FLAG_PRESENT;
+
+    if (pps->sign_data_hiding_flag)
+        controls->pps.flags |= V4L2_HEVC_PPS_FLAG_SIGN_DATA_HIDING_ENABLED;
+
+    if (pps->cabac_init_present_flag)
+        controls->pps.flags |= V4L2_HEVC_PPS_FLAG_CABAC_INIT_PRESENT;
+
+    if (pps->constrained_intra_pred_flag)
+        controls->pps.flags |= V4L2_HEVC_PPS_FLAG_CONSTRAINED_INTRA_PRED;
+
+    if (pps->transform_skip_enabled_flag)
+        controls->pps.flags |= V4L2_HEVC_PPS_FLAG_TRANSFORM_SKIP_ENABLED;
+
+    if (pps->cu_qp_delta_enabled_flag)
+        controls->pps.flags |= V4L2_HEVC_PPS_FLAG_CU_QP_DELTA_ENABLED;
+
+    if (pps->pic_slice_level_chroma_qp_offsets_present_flag)
+        controls->pps.flags |= V4L2_HEVC_PPS_FLAG_PPS_SLICE_CHROMA_QP_OFFSETS_PRESENT;
+
+    if (pps->weighted_pred_flag)
+        controls->pps.flags |= V4L2_HEVC_PPS_FLAG_WEIGHTED_PRED;
+
+    if (pps->weighted_bipred_flag)
+        controls->pps.flags |= V4L2_HEVC_PPS_FLAG_WEIGHTED_BIPRED;
+
+    if (pps->transquant_bypass_enable_flag)
+        controls->pps.flags |= V4L2_HEVC_PPS_FLAG_TRANSQUANT_BYPASS_ENABLED;
+
+    if (pps->tiles_enabled_flag)
+        controls->pps.flags |= V4L2_HEVC_PPS_FLAG_TILES_ENABLED;
+
+    if (pps->entropy_coding_sync_enabled_flag)
+        controls->pps.flags |= V4L2_HEVC_PPS_FLAG_ENTROPY_CODING_SYNC_ENABLED;
+
+    if (pps->loop_filter_across_tiles_enabled_flag)
+        controls->pps.flags |= V4L2_HEVC_PPS_FLAG_LOOP_FILTER_ACROSS_TILES_ENABLED;
+
+    if (pps->seq_loop_filter_across_slices_enabled_flag)
+        controls->pps.flags |= V4L2_HEVC_PPS_FLAG_PPS_LOOP_FILTER_ACROSS_SLICES_ENABLED;
+
+    if (pps->deblocking_filter_override_enabled_flag)
+        controls->pps.flags |= V4L2_HEVC_PPS_FLAG_DEBLOCKING_FILTER_OVERRIDE_ENABLED;
+
+    if (pps->disable_dbf)
+        controls->pps.flags |= V4L2_HEVC_PPS_FLAG_PPS_DISABLE_DEBLOCKING_FILTER;
+
+    if (pps->lists_modification_present_flag)
+        controls->pps.flags |= V4L2_HEVC_PPS_FLAG_LISTS_MODIFICATION_PRESENT;
+
+    if (pps->slice_header_extension_present_flag)
+        controls->pps.flags |= V4L2_HEVC_PPS_FLAG_SLICE_SEGMENT_HEADER_EXTENSION_PRESENT;
+
+    if (pps->deblocking_filter_control_present_flag)
+        controls->pps.flags |= V4L2_HEVC_PPS_FLAG_DEBLOCKING_FILTER_CONTROL_PRESENT;
+
+    if (pps->uniform_spacing_flag)
+        controls->pps.flags |= V4L2_HEVC_PPS_FLAG_UNIFORM_SPACING;
+
+    if (pps->tiles_enabled_flag) {
+        controls->pps.num_tile_columns_minus1 = pps->num_tile_columns - 1;
+        controls->pps.num_tile_rows_minus1 = pps->num_tile_rows - 1;
+
+        for (int i = 0; i < pps->num_tile_columns; i++)
+            controls->pps.column_width_minus1[i] = pps->column_width[i] - 1;
+
+        for (int i = 0; i < pps->num_tile_rows; i++)
+            controls->pps.row_height_minus1[i] = pps->row_height[i] - 1;
+    }
+
+    controls->first_slice = true;
+    controls->frame_slice_params = &controls->slice_params;
+    controls->allocated_slice_params = 0;
+    controls->num_slice_params = 0;
+    controls->allocated_entry_point_offsets = 0;
+    controls->num_entry_point_offsets = 0;
+
+    return 0;
+}
+
+static int v4l2_request_hevc_queue_decode(AVCodecContext *avctx, bool last_slice)
+{
+    const HEVCContext *h = avctx->priv_data;
+    V4L2RequestContextHEVC *ctx = avctx->internal->hwaccel_priv_data;
+    V4L2RequestControlsHEVC *controls = h->cur_frame->hwaccel_picture_private;
+    int count = 0;
+
+    struct v4l2_ext_control control[V4L2_HEVC_CONTROLS_MAX] = {};
+
+    control[count++] = (struct v4l2_ext_control) {
+        .id = V4L2_CID_STATELESS_HEVC_SPS,
+        .ptr = &controls->sps,
+        .size = sizeof(controls->sps),
+    };
+
+    control[count++] = (struct v4l2_ext_control) {
+        .id = V4L2_CID_STATELESS_HEVC_PPS,
+        .ptr = &controls->pps,
+        .size = sizeof(controls->pps),
+    };
+
+    control[count++] = (struct v4l2_ext_control) {
+        .id = V4L2_CID_STATELESS_HEVC_DECODE_PARAMS,
+        .ptr = &controls->decode_params,
+        .size = sizeof(controls->decode_params),
+    };
+
+    if (ctx->has_scaling_matrix) {
+        control[count++] = (struct v4l2_ext_control) {
+            .id = V4L2_CID_STATELESS_HEVC_SCALING_MATRIX,
+            .ptr = &controls->scaling_matrix,
+            .size = sizeof(controls->scaling_matrix),
+        };
+    }
+
+    if (ctx->max_slice_params && controls->num_slice_params) {
+        control[count++] = (struct v4l2_ext_control) {
+            .id = V4L2_CID_STATELESS_HEVC_SLICE_PARAMS,
+            .ptr = controls->frame_slice_params,
+            .size = sizeof(*controls->frame_slice_params) *
+                    FFMIN(controls->num_slice_params, ctx->max_slice_params),
+        };
+    }
+
+    if (ctx->max_entry_point_offsets && controls->num_entry_point_offsets) {
+        control[count++] = (struct v4l2_ext_control) {
+            .id = V4L2_CID_STATELESS_HEVC_ENTRY_POINT_OFFSETS,
+            .ptr = controls->entry_point_offsets,
+            .size = sizeof(*controls->entry_point_offsets) *
+                    FFMIN(controls->num_entry_point_offsets,
+                          ctx->max_entry_point_offsets),
+        };
+    }
+
+    if (ctx->decode_mode == V4L2_STATELESS_HEVC_DECODE_MODE_SLICE_BASED)
+        return ff_v4l2_request_decode_slice(avctx, &controls->pic, control, count,
+                                            controls->first_slice, last_slice);
+
+    return ff_v4l2_request_decode_frame(avctx, &controls->pic, control, count);
+}
+
+static int v4l2_request_hevc_decode_slice(AVCodecContext *avctx,
+                                          const uint8_t *buffer, uint32_t size)
+{
+    const HEVCContext *h = avctx->priv_data;
+    V4L2RequestContextHEVC *ctx = avctx->internal->hwaccel_priv_data;
+    V4L2RequestControlsHEVC *controls = h->cur_frame->hwaccel_picture_private;
+    const SliceHeader *sh = &h->sh;
+    int ret, slice = controls->num_slice_params;
+
+    if (ctx->decode_mode == V4L2_STATELESS_HEVC_DECODE_MODE_SLICE_BASED &&
+        (slice >= ctx->max_slice_params || (ctx->max_entry_point_offsets &&
+         (controls->num_entry_point_offsets + sh->num_entry_point_offsets > ctx->max_entry_point_offsets)))) {
+        ret = v4l2_request_hevc_queue_decode(avctx, false);
+        if (ret)
+            return ret;
+
+        ff_v4l2_request_reset_picture(avctx, &controls->pic);
+        slice = controls->num_slice_params = 0;
+        controls->num_entry_point_offsets = 0;
+        controls->first_slice = false;
+    }
+
+    if (ctx->start_code == V4L2_STATELESS_HEVC_START_CODE_ANNEX_B) {
+        ret = ff_v4l2_request_append_output(avctx, &controls->pic,
+                                            nalu_slice_start_code, 3);
+        if (ret)
+            return ret;
+    }
+
+    if (ctx->max_slice_params) {
+        if (slice && controls->allocated_slice_params < slice + 1) {
+            void *slice_params = controls->allocated_slice_params == 0 ? NULL : controls->frame_slice_params;
+            int slices = controls->allocated_slice_params == 0 ? 8 : controls->allocated_slice_params * 2;
+            slice_params = av_realloc_array(slice_params, slices, sizeof(*controls->frame_slice_params));
+            if (!slice_params)
+                return AVERROR(ENOMEM);
+            if (controls->allocated_slice_params == 0)
+                memcpy(slice_params, controls->frame_slice_params, sizeof(*controls->frame_slice_params));
+            controls->frame_slice_params = slice_params;
+            controls->allocated_slice_params = slices;
+        }
+
+        ret = fill_slice_params(controls, slice, size,
+                                !!ctx->max_entry_point_offsets, h);
+        if (ret)
+            return ret;
+    }
+
+    ret = ff_v4l2_request_append_output(avctx, &controls->pic, buffer, size);
+    if (ret)
+        return ret;
+
+    controls->num_slice_params++;
+    return 0;
+}
+
+static int v4l2_request_hevc_end_frame(AVCodecContext *avctx)
+{
+    return v4l2_request_hevc_queue_decode(avctx, true);
+}
+
+static void v4l2_request_hevc_free_frame_priv(AVRefStructOpaque hwctx, void *data)
+{
+    V4L2RequestControlsHEVC *controls = data;
+
+    if (controls->allocated_slice_params)
+        av_freep(&controls->frame_slice_params);
+
+    av_freep(&controls->entry_point_offsets);
+}
+
+static int v4l2_request_hevc_post_frames_ctx(AVCodecContext *avctx)
+{
+    V4L2RequestContextHEVC *ctx = avctx->internal->hwaccel_priv_data;
+    int ret;
+
+    struct v4l2_ext_control control[] = {
+        { .id = V4L2_CID_STATELESS_HEVC_DECODE_MODE, },
+        { .id = V4L2_CID_STATELESS_HEVC_START_CODE, },
+    };
+    struct v4l2_query_ext_ctrl scaling_matrix = {
+        .id = V4L2_CID_STATELESS_HEVC_SCALING_MATRIX,
+    };
+    struct v4l2_query_ext_ctrl entry_point_offsets = {
+        .id = V4L2_CID_STATELESS_HEVC_ENTRY_POINT_OFFSETS,
+    };
+    struct v4l2_query_ext_ctrl slice_params = {
+        .id = V4L2_CID_STATELESS_HEVC_SLICE_PARAMS,
+    };
+
+    ctx->decode_mode = ff_v4l2_request_query_control_default_value(avctx,
+                                        V4L2_CID_STATELESS_HEVC_DECODE_MODE);
+    if (ctx->decode_mode != V4L2_STATELESS_HEVC_DECODE_MODE_SLICE_BASED &&
+        ctx->decode_mode != V4L2_STATELESS_HEVC_DECODE_MODE_FRAME_BASED) {
+        av_log(ctx, AV_LOG_VERBOSE, "Unsupported decode mode: %d\n",
+               ctx->decode_mode);
+        return AVERROR(EINVAL);
+    }
+
+    ctx->start_code = ff_v4l2_request_query_control_default_value(avctx,
+                                        V4L2_CID_STATELESS_HEVC_START_CODE);
+    if (ctx->start_code != V4L2_STATELESS_HEVC_START_CODE_NONE &&
+        ctx->start_code != V4L2_STATELESS_HEVC_START_CODE_ANNEX_B) {
+        av_log(ctx, AV_LOG_VERBOSE, "Unsupported start code: %d\n",
+               ctx->start_code);
+        return AVERROR(EINVAL);
+    }
+
+    // TODO: check V4L2_CID_MPEG_VIDEO_HEVC_PROFILE control
+    // TODO: check V4L2_CID_MPEG_VIDEO_HEVC_LEVEL control
+
+    ret = ff_v4l2_request_query_control(avctx, &scaling_matrix);
+    if (!ret)
+        ctx->has_scaling_matrix = true;
+    else
+        ctx->has_scaling_matrix = false;
+
+    ret = ff_v4l2_request_query_control(avctx, &entry_point_offsets);
+    if (!ret)
+        ctx->max_entry_point_offsets = FFMAX(entry_point_offsets.dims[0], 1);
+    else
+        ctx->max_entry_point_offsets = 0;
+
+    ret = ff_v4l2_request_query_control(avctx, &slice_params);
+    if (!ret)
+        ctx->max_slice_params = FFMAX(slice_params.dims[0], 1);
+    else
+        ctx->max_slice_params = 0;
+
+    av_log(ctx, AV_LOG_VERBOSE, "%s-based decoder with SLICE_PARAMS=%u, "
+           "ENTRY_POINT_OFFSETS=%u and SCALING_MATRIX=%d controls\n",
+          ctx->decode_mode == V4L2_STATELESS_HEVC_DECODE_MODE_SLICE_BASED ? "slice" : "frame",
+          ctx->max_slice_params, ctx->max_entry_point_offsets, ctx->has_scaling_matrix);
+
+    control[0].value = ctx->decode_mode;
+    control[1].value = ctx->start_code;
+
+    return ff_v4l2_request_set_controls(avctx, control, FF_ARRAY_ELEMS(control));
+}
+
+static int v4l2_request_hevc_init(AVCodecContext *avctx)
+{
+    const HEVCContext *h = avctx->priv_data;
+    struct v4l2_ctrl_hevc_sps sps;
+
+    struct v4l2_ext_control control[] = {
+        {
+            .id = V4L2_CID_STATELESS_HEVC_SPS,
+            .ptr = &sps,
+            .size = sizeof(sps),
+        },
+    };
+
+    fill_sps(&sps, h);
+
+    return ff_v4l2_request_init(avctx, control, FF_ARRAY_ELEMS(control),
+                                v4l2_request_hevc_post_frames_ctx);
+}
+
+static int v4l2_request_hevc_frame_params(AVCodecContext *avctx,
+                                          AVBufferRef *hw_frames_ctx)
+{
+    const HEVCContext *h = avctx->priv_data;
+    const HEVCSPS *sps = h && h->pps ? h->pps->sps : NULL;
+    uint8_t bit_depth = sps ? sps->bit_depth : 0;
+
+    return ff_v4l2_request_frame_params(avctx, hw_frames_ctx,
+                                        V4L2_PIX_FMT_HEVC_SLICE, bit_depth);
+}
+
+const FFHWAccel ff_hevc_v4l2request_hwaccel = {
+    .p.name             = "hevc_v4l2request",
+    .p.type             = AVMEDIA_TYPE_VIDEO,
+    .p.id               = AV_CODEC_ID_HEVC,
+    .p.pix_fmt          = AV_PIX_FMT_DRM_PRIME,
+    .start_frame        = v4l2_request_hevc_start_frame,
+    .decode_slice       = v4l2_request_hevc_decode_slice,
+    .end_frame          = v4l2_request_hevc_end_frame,
+    .flush              = ff_v4l2_request_flush,
+    .free_frame_priv    = v4l2_request_hevc_free_frame_priv,
+    .frame_priv_data_size = sizeof(V4L2RequestControlsHEVC),
+    .init               = v4l2_request_hevc_init,
+    .uninit             = ff_v4l2_request_uninit,
+    .priv_data_size     = sizeof(V4L2RequestContextHEVC),
+    .frame_params       = v4l2_request_hevc_frame_params,
+    .caps_internal      = HWACCEL_CAP_ASYNC_SAFE,
+};

thirdparty/ffmpeg/libavcodec/v4l2_request_mpeg2.c

@@ -0,0 +1,184 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "config.h"
+
+#include "hwaccel_internal.h"
+#include "hwconfig.h"
+#include "mathops.h"
+#include "mpegvideo.h"
+#include "v4l2_request.h"
+
+typedef struct V4L2RequestControlsMPEG2 {
+    V4L2RequestPictureContext pic;
+    struct v4l2_ctrl_mpeg2_sequence sequence;
+    struct v4l2_ctrl_mpeg2_picture picture;
+    struct v4l2_ctrl_mpeg2_quantisation quantisation;
+} V4L2RequestControlsMPEG2;
+
+static int v4l2_request_mpeg2_start_frame(AVCodecContext *avctx,
+                                          av_unused const AVBufferRef *buf_ref,
+                                          av_unused const uint8_t *buffer,
+                                          av_unused uint32_t size)
+{
+    const MpegEncContext *s = avctx->priv_data;
+    V4L2RequestControlsMPEG2 *controls = s->cur_pic.ptr->hwaccel_picture_private;
+    int ret;
+
+    ret = ff_v4l2_request_start_frame(avctx, &controls->pic, s->cur_pic.ptr->f);
+    if (ret)
+        return ret;
+
+    controls->sequence = (struct v4l2_ctrl_mpeg2_sequence) {
+        /* ISO/IEC 13818-2, ITU-T Rec. H.262: Sequence header */
+        .horizontal_size = s->width,
+        .vertical_size = s->height,
+        .vbv_buffer_size = controls->pic.output->size,
+
+        /* ISO/IEC 13818-2, ITU-T Rec. H.262: Sequence extension */
+        .profile_and_level_indication = 0,
+        .chroma_format = s->chroma_format,
+    };
+
+    if (s->progressive_sequence)
+        controls->sequence.flags |= V4L2_MPEG2_SEQ_FLAG_PROGRESSIVE;
+
+    controls->picture = (struct v4l2_ctrl_mpeg2_picture) {
+        /* ISO/IEC 13818-2, ITU-T Rec. H.262: Picture header */
+        .picture_coding_type = s->pict_type,
+
+        /* ISO/IEC 13818-2, ITU-T Rec. H.262: Picture coding extension */
+        .f_code[0][0] = s->mpeg_f_code[0][0],
+        .f_code[0][1] = s->mpeg_f_code[0][1],
+        .f_code[1][0] = s->mpeg_f_code[1][0],
+        .f_code[1][1] = s->mpeg_f_code[1][1],
+        .picture_structure = s->picture_structure,
+        .intra_dc_precision = s->intra_dc_precision,
+    };
+
+    if (s->top_field_first)
+        controls->picture.flags |= V4L2_MPEG2_PIC_FLAG_TOP_FIELD_FIRST;
+
+    if (s->frame_pred_frame_dct)
+        controls->picture.flags |= V4L2_MPEG2_PIC_FLAG_FRAME_PRED_DCT;
+
+    if (s->concealment_motion_vectors)
+        controls->picture.flags |= V4L2_MPEG2_PIC_FLAG_CONCEALMENT_MV;
+
+    if (s->intra_vlc_format)
+        controls->picture.flags |= V4L2_MPEG2_PIC_FLAG_INTRA_VLC;
+
+    if (s->q_scale_type)
+        controls->picture.flags |= V4L2_MPEG2_PIC_FLAG_Q_SCALE_TYPE;
+
+    if (s->alternate_scan)
+        controls->picture.flags |= V4L2_MPEG2_PIC_FLAG_ALT_SCAN;
+
+    if (s->repeat_first_field)
+        controls->picture.flags |= V4L2_MPEG2_PIC_FLAG_REPEAT_FIRST;
+
+    if (s->progressive_frame)
+        controls->picture.flags |= V4L2_MPEG2_PIC_FLAG_PROGRESSIVE;
+
+    switch (s->pict_type) {
+    case AV_PICTURE_TYPE_B:
+        if (s->next_pic.ptr)
+            controls->picture.backward_ref_ts =
+                ff_v4l2_request_get_capture_timestamp(s->next_pic.ptr->f);
+        // fall-through
+    case AV_PICTURE_TYPE_P:
+        if (s->last_pic.ptr)
+            controls->picture.forward_ref_ts =
+                ff_v4l2_request_get_capture_timestamp(s->last_pic.ptr->f);
+    }
+
+    for (int i = 0; i < 64; i++) {
+        int n = s->idsp.idct_permutation[ff_zigzag_direct[i]];
+        controls->quantisation.intra_quantiser_matrix[i] = s->intra_matrix[n];
+        controls->quantisation.non_intra_quantiser_matrix[i] = s->inter_matrix[n];
+        controls->quantisation.chroma_intra_quantiser_matrix[i] = s->chroma_intra_matrix[n];
+        controls->quantisation.chroma_non_intra_quantiser_matrix[i] = s->chroma_inter_matrix[n];
+    }
+
+    return 0;
+}
+
+static int v4l2_request_mpeg2_decode_slice(AVCodecContext *avctx,
+                                           const uint8_t *buffer, uint32_t size)
+{
+    const MpegEncContext *s = avctx->priv_data;
+    V4L2RequestControlsMPEG2 *controls = s->cur_pic.ptr->hwaccel_picture_private;
+
+    return ff_v4l2_request_append_output(avctx, &controls->pic, buffer, size);
+}
+
+static int v4l2_request_mpeg2_end_frame(AVCodecContext *avctx)
+{
+    const MpegEncContext *s = avctx->priv_data;
+    V4L2RequestControlsMPEG2 *controls = s->cur_pic.ptr->hwaccel_picture_private;
+
+    struct v4l2_ext_control control[] = {
+        {
+            .id = V4L2_CID_STATELESS_MPEG2_SEQUENCE,
+            .ptr = &controls->sequence,
+            .size = sizeof(controls->sequence),
+        },
+        {
+            .id = V4L2_CID_STATELESS_MPEG2_PICTURE,
+            .ptr = &controls->picture,
+            .size = sizeof(controls->picture),
+        },
+        {
+            .id = V4L2_CID_STATELESS_MPEG2_QUANTISATION,
+            .ptr = &controls->quantisation,
+            .size = sizeof(controls->quantisation),
+        },
+    };
+
+    return ff_v4l2_request_decode_frame(avctx, &controls->pic,
+                                        control, FF_ARRAY_ELEMS(control));
+}
+
+static int v4l2_request_mpeg2_init(AVCodecContext *avctx)
+{
+    return ff_v4l2_request_init(avctx, NULL, 0, NULL);
+}
+
+static int v4l2_request_mpeg2_frame_params(AVCodecContext *avctx,
+                                           AVBufferRef *hw_frames_ctx)
+{
+    return ff_v4l2_request_frame_params(avctx, hw_frames_ctx,
+                                        V4L2_PIX_FMT_MPEG2_SLICE, 8);
+}
+
+const FFHWAccel ff_mpeg2_v4l2request_hwaccel = {
+    .p.name             = "mpeg2_v4l2request",
+    .p.type             = AVMEDIA_TYPE_VIDEO,
+    .p.id               = AV_CODEC_ID_MPEG2VIDEO,
+    .p.pix_fmt          = AV_PIX_FMT_DRM_PRIME,
+    .start_frame        = v4l2_request_mpeg2_start_frame,
+    .decode_slice       = v4l2_request_mpeg2_decode_slice,
+    .end_frame          = v4l2_request_mpeg2_end_frame,
+    .flush              = ff_v4l2_request_flush,
+    .frame_priv_data_size = sizeof(V4L2RequestControlsMPEG2),
+    .init               = v4l2_request_mpeg2_init,
+    .uninit             = ff_v4l2_request_uninit,
+    .priv_data_size     = sizeof(V4L2RequestContext),
+    .frame_params       = v4l2_request_mpeg2_frame_params,
+    .caps_internal      = HWACCEL_CAP_ASYNC_SAFE,
+};

thirdparty/ffmpeg/libavcodec/v4l2_request_vp8.c

@@ -0,0 +1,242 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "config.h"
+
+#include "hwaccel_internal.h"
+#include "hwconfig.h"
+#include "v4l2_request.h"
+#include "vp8.h"
+
+typedef struct V4L2RequestControlsVP8 {
+    V4L2RequestPictureContext pic;
+    struct v4l2_ctrl_vp8_frame frame;
+} V4L2RequestControlsVP8;
+
+static int v4l2_request_vp8_start_frame(AVCodecContext *avctx,
+                                        av_unused const AVBufferRef *buf_ref,
+                                        const uint8_t *buffer,
+                                        av_unused uint32_t size)
+{
+    const VP8Context *s = avctx->priv_data;
+    V4L2RequestControlsVP8 *controls = s->framep[VP8_FRAME_CURRENT]->hwaccel_picture_private;
+    struct v4l2_ctrl_vp8_frame *ctrl = &controls->frame;
+    unsigned int header_size = 3 + 7 * s->keyframe;
+    const uint8_t *data = buffer + header_size;
+    int ret, i, j, k;
+
+    ret = ff_v4l2_request_start_frame(avctx, &controls->pic,
+                                      s->framep[VP8_FRAME_CURRENT]->tf.f);
+    if (ret)
+        return ret;
+
+    *ctrl = (struct v4l2_ctrl_vp8_frame) {
+        .lf = {
+            .sharpness_level = s->filter.sharpness,
+            .level = s->filter.level,
+        },
+
+        .quant = {
+            .y_ac_qi = s->quant.yac_qi,
+            .y_dc_delta = s->quant.ydc_delta,
+            .y2_dc_delta = s->quant.y2dc_delta,
+            .y2_ac_delta = s->quant.y2ac_delta,
+            .uv_dc_delta = s->quant.uvdc_delta,
+            .uv_ac_delta = s->quant.uvac_delta,
+        },
+
+        .coder_state = {
+            .range = s->coder_state_at_header_end.range,
+            .value = s->coder_state_at_header_end.value,
+            .bit_count = s->coder_state_at_header_end.bit_count,
+        },
+
+        .width = avctx->width,
+        .height = avctx->height,
+
+        .horizontal_scale = 0, /* scale not supported by FFmpeg */
+        .vertical_scale = 0, /* scale not supported by FFmpeg */
+
+        .version = s->profile & 0x3,
+        .prob_skip_false = s->prob->mbskip,
+        .prob_intra = s->prob->intra,
+        .prob_last = s->prob->last,
+        .prob_gf = s->prob->golden,
+        .num_dct_parts = s->num_coeff_partitions,
+
+        .first_part_size = s->header_partition_size,
+        .first_part_header_bits = (8 * (s->coder_state_at_header_end.input - data) -
+                                   s->coder_state_at_header_end.bit_count - 8),
+    };
+
+    for (i = 0; i < 4; i++) {
+        ctrl->segment.quant_update[i] = s->segmentation.base_quant[i];
+        ctrl->segment.lf_update[i] = s->segmentation.filter_level[i];
+    }
+
+    for (i = 0; i < 3; i++)
+        ctrl->segment.segment_probs[i] = s->prob->segmentid[i];
+
+    if (s->segmentation.enabled)
+        ctrl->segment.flags |= V4L2_VP8_SEGMENT_FLAG_ENABLED;
+
+    if (s->segmentation.update_map)
+        ctrl->segment.flags |= V4L2_VP8_SEGMENT_FLAG_UPDATE_MAP;
+
+    if (s->segmentation.update_feature_data)
+        ctrl->segment.flags |= V4L2_VP8_SEGMENT_FLAG_UPDATE_FEATURE_DATA;
+
+    if (!s->segmentation.absolute_vals)
+        ctrl->segment.flags |= V4L2_VP8_SEGMENT_FLAG_DELTA_VALUE_MODE;
+
+    for (i = 0; i < 4; i++) {
+        ctrl->lf.ref_frm_delta[i] = s->lf_delta.ref[i];
+        ctrl->lf.mb_mode_delta[i] = s->lf_delta.mode[i + MODE_I4x4];
+    }
+
+    if (s->lf_delta.enabled)
+        ctrl->lf.flags |= V4L2_VP8_LF_ADJ_ENABLE;
+
+    if (s->lf_delta.update)
+        ctrl->lf.flags |= V4L2_VP8_LF_DELTA_UPDATE;
+
+    if (s->filter.simple)
+        ctrl->lf.flags |= V4L2_VP8_LF_FILTER_TYPE_SIMPLE;
+
+    if (s->keyframe) {
+        static const uint8_t keyframe_y_mode_probs[4] = {
+            145, 156, 163, 128
+        };
+        static const uint8_t keyframe_uv_mode_probs[3] = {
+            142, 114, 183
+        };
+
+        memcpy(ctrl->entropy.y_mode_probs, keyframe_y_mode_probs, 4);
+        memcpy(ctrl->entropy.uv_mode_probs, keyframe_uv_mode_probs, 3);
+    } else {
+        for (i = 0; i < 4; i++)
+            ctrl->entropy.y_mode_probs[i] = s->prob->pred16x16[i];
+        for (i = 0; i < 3; i++)
+            ctrl->entropy.uv_mode_probs[i] = s->prob->pred8x8c[i];
+    }
+    for (i = 0; i < 2; i++)
+        for (j = 0; j < 19; j++)
+            ctrl->entropy.mv_probs[i][j] = s->prob->mvc[i][j];
+
+    for (i = 0; i < 4; i++) {
+        for (j = 0; j < 8; j++) {
+            static const int coeff_bands_inverse[8] = {
+                0, 1, 2, 3, 5, 6, 4, 15
+            };
+            int coeff_pos = coeff_bands_inverse[j];
+
+            for (k = 0; k < 3; k++) {
+                memcpy(ctrl->entropy.coeff_probs[i][j][k],
+                       s->prob->token[i][coeff_pos][k], 11);
+            }
+        }
+    }
+
+    for (i = 0; i < 8; i++)
+        ctrl->dct_part_sizes[i] = s->coeff_partition_size[i];
+
+    if (s->framep[VP8_FRAME_PREVIOUS])
+        ctrl->last_frame_ts =
+            ff_v4l2_request_get_capture_timestamp(s->framep[VP8_FRAME_PREVIOUS]->tf.f);
+    if (s->framep[VP8_FRAME_GOLDEN])
+        ctrl->golden_frame_ts =
+            ff_v4l2_request_get_capture_timestamp(s->framep[VP8_FRAME_GOLDEN]->tf.f);
+    if (s->framep[VP8_FRAME_ALTREF])
+        ctrl->alt_frame_ts =
+            ff_v4l2_request_get_capture_timestamp(s->framep[VP8_FRAME_ALTREF]->tf.f);
+
+    if (s->keyframe)
+        ctrl->flags |= V4L2_VP8_FRAME_FLAG_KEY_FRAME;
+
+    if (s->profile & 0x4)
+        ctrl->flags |= V4L2_VP8_FRAME_FLAG_EXPERIMENTAL;
+
+    if (!s->invisible)
+        ctrl->flags |= V4L2_VP8_FRAME_FLAG_SHOW_FRAME;
+
+    if (s->mbskip_enabled)
+        ctrl->flags |= V4L2_VP8_FRAME_FLAG_MB_NO_SKIP_COEFF;
+
+    if (s->sign_bias[VP8_FRAME_GOLDEN])
+        ctrl->flags |= V4L2_VP8_FRAME_FLAG_SIGN_BIAS_GOLDEN;
+
+    if (s->sign_bias[VP8_FRAME_ALTREF])
+        ctrl->flags |= V4L2_VP8_FRAME_FLAG_SIGN_BIAS_ALT;
+
+    return 0;
+}
+
+static int v4l2_request_vp8_decode_slice(AVCodecContext *avctx,
+                                         const uint8_t *buffer, uint32_t size)
+{
+    const VP8Context *s = avctx->priv_data;
+    V4L2RequestControlsVP8 *controls = s->framep[VP8_FRAME_CURRENT]->hwaccel_picture_private;
+
+    return ff_v4l2_request_append_output(avctx, &controls->pic, buffer, size);
+}
+
+static int v4l2_request_vp8_end_frame(AVCodecContext *avctx)
+{
+    const VP8Context *s = avctx->priv_data;
+    V4L2RequestControlsVP8 *controls = s->framep[VP8_FRAME_CURRENT]->hwaccel_picture_private;
+
+    struct v4l2_ext_control control[] = {
+        {
+            .id = V4L2_CID_STATELESS_VP8_FRAME,
+            .ptr = &controls->frame,
+            .size = sizeof(controls->frame),
+        },
+    };
+
+    return ff_v4l2_request_decode_frame(avctx, &controls->pic,
+                                        control, FF_ARRAY_ELEMS(control));
+}
+
+static int v4l2_request_vp8_init(AVCodecContext *avctx)
+{
+    return ff_v4l2_request_init(avctx, NULL, 0, NULL);
+}
+
+static int v4l2_request_vp8_frame_params(AVCodecContext *avctx,
+                                         AVBufferRef *hw_frames_ctx)
+{
+    return ff_v4l2_request_frame_params(avctx, hw_frames_ctx,
+                                        V4L2_PIX_FMT_VP8_FRAME, 8);
+}
+
+const FFHWAccel ff_vp8_v4l2request_hwaccel = {
+    .p.name             = "vp8_v4l2request",
+    .p.type             = AVMEDIA_TYPE_VIDEO,
+    .p.id               = AV_CODEC_ID_VP8,
+    .p.pix_fmt          = AV_PIX_FMT_DRM_PRIME,
+    .start_frame        = v4l2_request_vp8_start_frame,
+    .decode_slice       = v4l2_request_vp8_decode_slice,
+    .end_frame          = v4l2_request_vp8_end_frame,
+    .flush              = ff_v4l2_request_flush,
+    .frame_priv_data_size = sizeof(V4L2RequestControlsVP8),
+    .init               = v4l2_request_vp8_init,
+    .uninit             = ff_v4l2_request_uninit,
+    .priv_data_size     = sizeof(V4L2RequestContext),
+    .frame_params       = v4l2_request_vp8_frame_params,
+    .caps_internal      = HWACCEL_CAP_ASYNC_SAFE,
+};

thirdparty/ffmpeg/libavcodec/v4l2_request_vp9.c

@@ -0,0 +1,530 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "config.h"
+
+#include "hwaccel_internal.h"
+#include "hwconfig.h"
+#include "internal.h"
+#include "v4l2_request.h"
+#include "vp89_rac.h"
+#include "vp9dec.h"
+
+#define V4L2_VP9_CONTROLS_MAX 2
+
+typedef struct V4L2RequestContextVP9 {
+    V4L2RequestContext base;
+    bool has_compressed_hdr;
+} V4L2RequestContextVP9;
+
+typedef struct V4L2RequestControlsVP9 {
+    V4L2RequestPictureContext pic;
+    struct v4l2_ctrl_vp9_frame frame;
+    struct v4l2_ctrl_vp9_compressed_hdr compressed_hdr;
+} V4L2RequestControlsVP9;
+
+// differential forward probability updates
+static int read_prob_delta(VPXRangeCoder *c)
+{
+    static const uint8_t inv_map_table[255] = {
+          7,  20,  33,  46,  59,  72,  85,  98, 111, 124, 137, 150, 163, 176,
+        189, 202, 215, 228, 241, 254,   1,   2,   3,   4,   5,   6,   8,   9,
+         10,  11,  12,  13,  14,  15,  16,  17,  18,  19,  21,  22,  23,  24,
+         25,  26,  27,  28,  29,  30,  31,  32,  34,  35,  36,  37,  38,  39,
+         40,  41,  42,  43,  44,  45,  47,  48,  49,  50,  51,  52,  53,  54,
+         55,  56,  57,  58,  60,  61,  62,  63,  64,  65,  66,  67,  68,  69,
+         70,  71,  73,  74,  75,  76,  77,  78,  79,  80,  81,  82,  83,  84,
+         86,  87,  88,  89,  90,  91,  92,  93,  94,  95,  96,  97,  99, 100,
+        101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 112, 113, 114, 115,
+        116, 117, 118, 119, 120, 121, 122, 123, 125, 126, 127, 128, 129, 130,
+        131, 132, 133, 134, 135, 136, 138, 139, 140, 141, 142, 143, 144, 145,
+        146, 147, 148, 149, 151, 152, 153, 154, 155, 156, 157, 158, 159, 160,
+        161, 162, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175,
+        177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 190, 191,
+        192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 203, 204, 205, 206,
+        207, 208, 209, 210, 211, 212, 213, 214, 216, 217, 218, 219, 220, 221,
+        222, 223, 224, 225, 226, 227, 229, 230, 231, 232, 233, 234, 235, 236,
+        237, 238, 239, 240, 242, 243, 244, 245, 246, 247, 248, 249, 250, 251,
+        252, 253, 253,
+    };
+    int d;
+
+    /* This code is trying to do a differential probability update. For a
+     * current probability A in the range [1, 255], the difference to a new
+     * probability of any value can be expressed differentially as 1-A, 255-A
+     * where some part of this (absolute range) exists both in positive as
+     * well as the negative part, whereas another part only exists in one
+     * half. We're trying to code this shared part differentially, i.e.
+     * times two where the value of the lowest bit specifies the sign, and
+     * the single part is then coded on top of this. This absolute difference
+     * then again has a value of [0, 254], but a bigger value in this range
+     * indicates that we're further away from the original value A, so we
+     * can code this as a VLC code, since higher values are increasingly
+     * unlikely. The first 20 values in inv_map_table[] allow 'cheap, rough'
+     * updates vs. the 'fine, exact' updates further down the range, which
+     * adds one extra dimension to this differential update model. */
+
+    if (!vp89_rac_get(c)) {
+        d = vp89_rac_get_uint(c, 4) + 0;
+    } else if (!vp89_rac_get(c)) {
+        d = vp89_rac_get_uint(c, 4) + 16;
+    } else if (!vp89_rac_get(c)) {
+        d = vp89_rac_get_uint(c, 5) + 32;
+    } else {
+        d = vp89_rac_get_uint(c, 7);
+        if (d >= 65)
+            d = (d << 1) - 65 + vp89_rac_get(c);
+        d += 64;
+        av_assert2(d < FF_ARRAY_ELEMS(inv_map_table));
+    }
+
+    return inv_map_table[d];
+}
+
+static void fill_compressed_hdr(struct v4l2_ctrl_vp9_compressed_hdr *ctrl,
+                                const uint8_t *buffer, uint32_t size,
+                                AVCodecContext *avctx)
+{
+    const VP9Context *s = avctx->priv_data;
+    enum CompPredMode comppredmode;
+    int ret, i, j, k, l, m, n;
+    VPXRangeCoder c;
+
+    ret = ff_vpx_init_range_decoder(&c, buffer + s->s.h.uncompressed_header_size,
+                                    s->s.h.compressed_header_size);
+    if (ret < 0)
+        return;
+
+    if (vpx_rac_get_prob_branchy(&c, 128)) // marker bit
+        return;
+
+    // txfm updates
+    if (s->s.h.lossless) {
+        ctrl->tx_mode = V4L2_VP9_TX_MODE_ONLY_4X4;
+    } else {
+        ctrl->tx_mode = vp89_rac_get_uint(&c, 2);
+        if (ctrl->tx_mode == V4L2_VP9_TX_MODE_ALLOW_32X32)
+            ctrl->tx_mode += vp89_rac_get(&c);
+
+        if (ctrl->tx_mode == V4L2_VP9_TX_MODE_SELECT) {
+            for (i = 0; i < 2; i++)
+                if (vpx_rac_get_prob_branchy(&c, 252))
+                    ctrl->tx8[i][0] = read_prob_delta(&c);
+            for (i = 0; i < 2; i++)
+                for (j = 0; j < 2; j++)
+                    if (vpx_rac_get_prob_branchy(&c, 252))
+                        ctrl->tx16[i][j] = read_prob_delta(&c);
+            for (i = 0; i < 2; i++)
+                for (j = 0; j < 3; j++)
+                    if (vpx_rac_get_prob_branchy(&c, 252))
+                        ctrl->tx32[i][j] = read_prob_delta(&c);
+        }
+    }
+
+    // coef updates
+    for (i = 0; i < 4; i++) {
+        if (vp89_rac_get(&c)) {
+            for (j = 0; j < 2; j++)
+                for (k = 0; k < 2; k++)
+                    for (l = 0; l < 6; l++)
+                        for (m = 0; m < 6; m++) {
+                            if (m >= 3 && l == 0) // dc only has 3 pt
+                                break;
+                            for (n = 0; n < 3; n++)
+                                if (vpx_rac_get_prob_branchy(&c, 252))
+                                    ctrl->coef[i][j][k][l][m][n] =
+                                                            read_prob_delta(&c);
+                        }
+        }
+        if (ctrl->tx_mode == i)
+            break;
+    }
+
+    // mode updates
+    for (i = 0; i < 3; i++)
+        if (vpx_rac_get_prob_branchy(&c, 252))
+            ctrl->skip[i] = read_prob_delta(&c);
+    if (!s->s.h.keyframe && !s->s.h.intraonly) {
+        for (i = 0; i < 7; i++)
+            for (j = 0; j < 3; j++)
+                if (vpx_rac_get_prob_branchy(&c, 252))
+                    ctrl->inter_mode[i][j] = read_prob_delta(&c);
+
+        if (s->s.h.filtermode == FILTER_SWITCHABLE)
+            for (i = 0; i < 4; i++)
+                for (j = 0; j < 2; j++)
+                    if (vpx_rac_get_prob_branchy(&c, 252))
+                        ctrl->interp_filter[i][j] = read_prob_delta(&c);
+
+        for (i = 0; i < 4; i++)
+            if (vpx_rac_get_prob_branchy(&c, 252))
+                ctrl->is_inter[i] = read_prob_delta(&c);
+
+        if (s->s.h.allowcompinter) {
+            comppredmode = vp89_rac_get(&c);
+            if (comppredmode)
+                comppredmode += vp89_rac_get(&c);
+            if (comppredmode == PRED_SWITCHABLE)
+                for (i = 0; i < 5; i++)
+                    if (vpx_rac_get_prob_branchy(&c, 252))
+                        ctrl->comp_mode[i] = read_prob_delta(&c);
+        } else {
+            comppredmode = PRED_SINGLEREF;
+        }
+
+        if (comppredmode != PRED_COMPREF) {
+            for (i = 0; i < 5; i++) {
+                if (vpx_rac_get_prob_branchy(&c, 252))
+                    ctrl->single_ref[i][0] = read_prob_delta(&c);
+                if (vpx_rac_get_prob_branchy(&c, 252))
+                    ctrl->single_ref[i][1] = read_prob_delta(&c);
+            }
+        }
+
+        if (comppredmode != PRED_SINGLEREF) {
+            for (i = 0; i < 5; i++)
+                if (vpx_rac_get_prob_branchy(&c, 252))
+                    ctrl->comp_ref[i] = read_prob_delta(&c);
+        }
+
+        for (i = 0; i < 4; i++)
+            for (j = 0; j < 9; j++)
+                if (vpx_rac_get_prob_branchy(&c, 252))
+                    ctrl->y_mode[i][j] = read_prob_delta(&c);
+
+        for (i = 0; i < 4; i++)
+            for (j = 0; j < 4; j++)
+                for (k = 0; k < 3; k++)
+                    if (vpx_rac_get_prob_branchy(&c, 252))
+                        ctrl->partition[(i * 4) + j][k] = read_prob_delta(&c);
+
+        // mv fields
+        for (i = 0; i < 3; i++)
+            if (vpx_rac_get_prob_branchy(&c, 252))
+                ctrl->mv.joint[i] = (vp89_rac_get_uint(&c, 7) << 1) | 1;
+
+        for (i = 0; i < 2; i++) {
+            if (vpx_rac_get_prob_branchy(&c, 252))
+                ctrl->mv.sign[i] = (vp89_rac_get_uint(&c, 7) << 1) | 1;
+
+            for (j = 0; j < 10; j++)
+                if (vpx_rac_get_prob_branchy(&c, 252))
+                    ctrl->mv.classes[i][j] = (vp89_rac_get_uint(&c, 7) << 1) | 1;
+
+            if (vpx_rac_get_prob_branchy(&c, 252))
+                ctrl->mv.class0_bit[i] = (vp89_rac_get_uint(&c, 7) << 1) | 1;
+
+            for (j = 0; j < 10; j++)
+                if (vpx_rac_get_prob_branchy(&c, 252))
+                    ctrl->mv.bits[i][j] = (vp89_rac_get_uint(&c, 7) << 1) | 1;
+        }
+
+        for (i = 0; i < 2; i++) {
+            for (j = 0; j < 2; j++)
+                for (k = 0; k < 3; k++)
+                    if (vpx_rac_get_prob_branchy(&c, 252))
+                        ctrl->mv.class0_fr[i][j][k] =
+                                            (vp89_rac_get_uint(&c, 7) << 1) | 1;
+
+            for (j = 0; j < 3; j++)
+                if (vpx_rac_get_prob_branchy(&c, 252))
+                    ctrl->mv.fr[i][j] = (vp89_rac_get_uint(&c, 7) << 1) | 1;
+        }
+
+        if (s->s.h.highprecisionmvs) {
+            for (i = 0; i < 2; i++) {
+                if (vpx_rac_get_prob_branchy(&c, 252))
+                    ctrl->mv.class0_hp[i] = (vp89_rac_get_uint(&c, 7) << 1) | 1;
+
+                if (vpx_rac_get_prob_branchy(&c, 252))
+                    ctrl->mv.hp[i] = (vp89_rac_get_uint(&c, 7) << 1) | 1;
+            }
+        }
+    }
+
+    memcpy(ctrl->uv_mode, s->prob.p.uv_mode, sizeof(ctrl->uv_mode));
+}
+
+static void fill_frame(struct v4l2_ctrl_vp9_frame *ctrl, AVCodecContext *avctx)
+{
+    const VP9Context *s = avctx->priv_data;
+    AVFrame *ref;
+    int i;
+
+    *ctrl = (struct v4l2_ctrl_vp9_frame) {
+        .lf = {
+            .level = s->s.h.filter.level,
+            .sharpness = s->s.h.filter.sharpness,
+        },
+
+        .quant = {
+            .base_q_idx = s->s.h.yac_qi,
+            .delta_q_y_dc = s->s.h.ydc_qdelta,
+            .delta_q_uv_dc = s->s.h.uvdc_qdelta,
+            .delta_q_uv_ac = s->s.h.uvac_qdelta,
+        },
+
+        .compressed_header_size = s->s.h.compressed_header_size,
+        .uncompressed_header_size = s->s.h.uncompressed_header_size,
+        .frame_width_minus_1 = avctx->width - 1,
+        .frame_height_minus_1 = avctx->height - 1,
+        .render_width_minus_1 = s->w - 1,
+        .render_height_minus_1 = s->h - 1,
+        .reset_frame_context = s->s.h.resetctx > 0 ? s->s.h.resetctx - 1 : 0,
+        .frame_context_idx = s->s.h.framectxid,
+        .profile = s->s.h.profile,
+        .bit_depth = s->s.h.bpp,
+        .interpolation_filter = s->s.h.filtermode ^ (s->s.h.filtermode <= 1),
+        .tile_cols_log2 = s->s.h.tiling.log2_tile_cols,
+        .tile_rows_log2 = s->s.h.tiling.log2_tile_rows,
+        .reference_mode = s->s.h.comppredmode,
+    };
+
+    for (i = 0; i < 4; i++)
+        ctrl->lf.ref_deltas[i] = s->s.h.lf_delta.ref[i];
+
+    for (i = 0; i < 2; i++)
+        ctrl->lf.mode_deltas[i] = s->s.h.lf_delta.mode[i];
+
+    if (s->s.h.lf_delta.enabled)
+        ctrl->lf.flags |= V4L2_VP9_LOOP_FILTER_FLAG_DELTA_ENABLED;
+
+    if (s->s.h.lf_delta.updated)
+        ctrl->lf.flags |= V4L2_VP9_LOOP_FILTER_FLAG_DELTA_UPDATE;
+
+    for (i = 0; i < 8; i++) {
+        if (s->s.h.segmentation.feat[i].q_enabled) {
+            ctrl->seg.feature_data[i][V4L2_VP9_SEG_LVL_ALT_Q] =
+                                            s->s.h.segmentation.feat[i].q_val;
+            ctrl->seg.feature_enabled[i] |= 1 << V4L2_VP9_SEG_LVL_ALT_Q;
+        }
+
+        if (s->s.h.segmentation.feat[i].lf_enabled) {
+            ctrl->seg.feature_data[i][V4L2_VP9_SEG_LVL_ALT_L] =
+                                            s->s.h.segmentation.feat[i].lf_val;
+            ctrl->seg.feature_enabled[i] |= 1 << V4L2_VP9_SEG_LVL_ALT_L;
+        }
+
+        if (s->s.h.segmentation.feat[i].ref_enabled) {
+            ctrl->seg.feature_data[i][V4L2_VP9_SEG_LVL_REF_FRAME] =
+                                            s->s.h.segmentation.feat[i].ref_val;
+            ctrl->seg.feature_enabled[i] |= 1 << V4L2_VP9_SEG_LVL_REF_FRAME;
+        }
+
+        if (s->s.h.segmentation.feat[i].skip_enabled)
+            ctrl->seg.feature_enabled[i] |= 1 << V4L2_VP9_SEG_LVL_SKIP;
+    }
+
+    for (i = 0; i < 7; i++)
+        ctrl->seg.tree_probs[i] = s->s.h.segmentation.prob[i];
+
+    if (s->s.h.segmentation.temporal) {
+        for (i = 0; i < 3; i++)
+            ctrl->seg.pred_probs[i] = s->s.h.segmentation.pred_prob[i];
+    } else {
+        memset(ctrl->seg.pred_probs, 255, sizeof(ctrl->seg.pred_probs));
+    }
+
+    if (s->s.h.segmentation.enabled)
+        ctrl->seg.flags |= V4L2_VP9_SEGMENTATION_FLAG_ENABLED;
+
+    if (s->s.h.segmentation.update_map)
+        ctrl->seg.flags |= V4L2_VP9_SEGMENTATION_FLAG_UPDATE_MAP;
+
+    if (s->s.h.segmentation.temporal)
+        ctrl->seg.flags |= V4L2_VP9_SEGMENTATION_FLAG_TEMPORAL_UPDATE;
+
+    if (s->frame_header->segmentation_update_data)
+        ctrl->seg.flags |= V4L2_VP9_SEGMENTATION_FLAG_UPDATE_DATA;
+
+    if (s->s.h.segmentation.absolute_vals)
+        ctrl->seg.flags |= V4L2_VP9_SEGMENTATION_FLAG_ABS_OR_DELTA_UPDATE;
+
+    if (s->s.h.keyframe)
+        ctrl->flags |= V4L2_VP9_FRAME_FLAG_KEY_FRAME;
+
+    if (!s->s.h.invisible)
+        ctrl->flags |= V4L2_VP9_FRAME_FLAG_SHOW_FRAME;
+
+    if (s->s.h.errorres)
+        ctrl->flags |= V4L2_VP9_FRAME_FLAG_ERROR_RESILIENT;
+
+    if (s->s.h.intraonly)
+        ctrl->flags |= V4L2_VP9_FRAME_FLAG_INTRA_ONLY;
+
+    if (!s->s.h.keyframe && s->s.h.highprecisionmvs)
+        ctrl->flags |= V4L2_VP9_FRAME_FLAG_ALLOW_HIGH_PREC_MV;
+
+    if (s->s.h.refreshctx)
+        ctrl->flags |= V4L2_VP9_FRAME_FLAG_REFRESH_FRAME_CTX;
+
+    if (s->s.h.parallelmode)
+        ctrl->flags |= V4L2_VP9_FRAME_FLAG_PARALLEL_DEC_MODE;
+
+    if (s->ss_h)
+        ctrl->flags |= V4L2_VP9_FRAME_FLAG_X_SUBSAMPLING;
+
+    if (s->ss_v)
+        ctrl->flags |= V4L2_VP9_FRAME_FLAG_Y_SUBSAMPLING;
+
+    if (avctx->color_range == AVCOL_RANGE_JPEG)
+        ctrl->flags |= V4L2_VP9_FRAME_FLAG_COLOR_RANGE_FULL_SWING;
+
+    ref = s->s.refs[s->s.h.refidx[0]].f;
+    if (ref && ref->private_ref)
+        ctrl->last_frame_ts = ff_v4l2_request_get_capture_timestamp(ref);
+
+    ref = s->s.refs[s->s.h.refidx[1]].f;
+    if (ref && ref->private_ref)
+        ctrl->golden_frame_ts = ff_v4l2_request_get_capture_timestamp(ref);
+
+    ref = s->s.refs[s->s.h.refidx[2]].f;
+    if (ref && ref->private_ref)
+        ctrl->alt_frame_ts = ff_v4l2_request_get_capture_timestamp(ref);
+
+    if (s->s.h.signbias[0])
+        ctrl->ref_frame_sign_bias |= V4L2_VP9_SIGN_BIAS_LAST;
+
+    if (s->s.h.signbias[1])
+        ctrl->ref_frame_sign_bias |= V4L2_VP9_SIGN_BIAS_GOLDEN;
+
+    if (s->s.h.signbias[2])
+        ctrl->ref_frame_sign_bias |= V4L2_VP9_SIGN_BIAS_ALT;
+}
+
+static int v4l2_request_vp9_start_frame(AVCodecContext *avctx,
+                                        av_unused const AVBufferRef *buf_ref,
+                                        const uint8_t *buffer,
+                                        uint32_t size)
+{
+    const VP9SharedContext *h = avctx->priv_data;
+    const VP9Frame *f = &h->frames[CUR_FRAME];
+    V4L2RequestContextVP9 *ctx = avctx->internal->hwaccel_priv_data;
+    V4L2RequestControlsVP9 *controls = f->hwaccel_picture_private;
+    int ret;
+
+    ret = ff_v4l2_request_start_frame(avctx, &controls->pic, f->tf.f);
+    if (ret)
+        return ret;
+
+    fill_frame(&controls->frame, avctx);
+
+    if (ctx->has_compressed_hdr)
+        fill_compressed_hdr(&controls->compressed_hdr, buffer, size, avctx);
+
+    return 0;
+}
+
+static int v4l2_request_vp9_decode_slice(AVCodecContext *avctx,
+                                         const uint8_t *buffer, uint32_t size)
+{
+    const VP9SharedContext *h = avctx->priv_data;
+    V4L2RequestControlsVP9 *controls = h->frames[CUR_FRAME].hwaccel_picture_private;
+
+    return ff_v4l2_request_append_output(avctx, &controls->pic, buffer, size);
+}
+
+static int v4l2_request_vp9_end_frame(AVCodecContext *avctx)
+{
+    const VP9SharedContext *h = avctx->priv_data;
+    V4L2RequestContextVP9 *ctx = avctx->internal->hwaccel_priv_data;
+    V4L2RequestControlsVP9 *controls = h->frames[CUR_FRAME].hwaccel_picture_private;
+    int count = 0;
+
+    struct v4l2_ext_control control[V4L2_VP9_CONTROLS_MAX] = {};
+
+    control[count++] = (struct v4l2_ext_control) {
+        .id = V4L2_CID_STATELESS_VP9_FRAME,
+        .ptr = &controls->frame,
+        .size = sizeof(controls->frame),
+    };
+
+    if (ctx->has_compressed_hdr) {
+        control[count++] = (struct v4l2_ext_control) {
+            .id = V4L2_CID_STATELESS_VP9_COMPRESSED_HDR,
+            .ptr = &controls->compressed_hdr,
+            .size = sizeof(controls->compressed_hdr),
+        };
+    }
+
+    return ff_v4l2_request_decode_frame(avctx, &controls->pic, control, count);
+}
+
+static int v4l2_request_vp9_post_frames_ctx(AVCodecContext *avctx)
+{
+    V4L2RequestContextVP9 *ctx = avctx->internal->hwaccel_priv_data;
+
+    struct v4l2_query_ext_ctrl compressed_hdr = {
+        .id = V4L2_CID_STATELESS_VP9_COMPRESSED_HDR,
+    };
+
+    // TODO: check V4L2_CID_MPEG_VIDEO_VP9_PROFILE
+    // TODO: check V4L2_CID_MPEG_VIDEO_VP9_LEVEL
+
+    if (!ff_v4l2_request_query_control(avctx, &compressed_hdr))
+        ctx->has_compressed_hdr = true;
+    else
+        ctx->has_compressed_hdr = false;
+
+    return 0;
+}
+
+static int v4l2_request_vp9_init(AVCodecContext *avctx)
+{
+    struct v4l2_ctrl_vp9_frame frame;
+
+    struct v4l2_ext_control control[] = {
+        {
+            .id = V4L2_CID_STATELESS_VP9_FRAME,
+            .ptr = &frame,
+            .size = sizeof(frame),
+        },
+    };
+
+    fill_frame(&frame, avctx);
+
+    return ff_v4l2_request_init(avctx, control, FF_ARRAY_ELEMS(control),
+                                v4l2_request_vp9_post_frames_ctx);
+}
+
+static int v4l2_request_vp9_frame_params(AVCodecContext *avctx,
+                                         AVBufferRef *hw_frames_ctx)
+{
+    const VP9Context *s = avctx->priv_data;
+    uint8_t bit_depth = s ? s->s.h.bpp : 0;
+
+    return ff_v4l2_request_frame_params(avctx, hw_frames_ctx,
+                                        V4L2_PIX_FMT_VP9_FRAME, bit_depth);
+}
+
+const FFHWAccel ff_vp9_v4l2request_hwaccel = {
+    .p.name             = "vp9_v4l2request",
+    .p.type             = AVMEDIA_TYPE_VIDEO,
+    .p.id               = AV_CODEC_ID_VP9,
+    .p.pix_fmt          = AV_PIX_FMT_DRM_PRIME,
+    .start_frame        = v4l2_request_vp9_start_frame,
+    .decode_slice       = v4l2_request_vp9_decode_slice,
+    .end_frame          = v4l2_request_vp9_end_frame,
+    .flush              = ff_v4l2_request_flush,
+    .frame_priv_data_size = sizeof(V4L2RequestControlsVP9),
+    .init               = v4l2_request_vp9_init,
+    .uninit             = ff_v4l2_request_uninit,
+    .priv_data_size     = sizeof(V4L2RequestContextVP9),
+    .frame_params       = v4l2_request_vp9_frame_params,
+    .caps_internal      = HWACCEL_CAP_ASYNC_SAFE,
+};

thirdparty/ffmpeg/libavcodec/vp8.c

@@ -185,6 +185,9 @@ static enum AVPixelFormat get_pixel_format(VP8Context *s)
 #endif
 #if CONFIG_VP8_NVDEC_HWACCEL
         AV_PIX_FMT_CUDA,
+#endif
+#if CONFIG_VP8_V4L2REQUEST_HWACCEL
+        AV_PIX_FMT_DRM_PRIME,
 #endif
         AV_PIX_FMT_YUV420P,
         AV_PIX_FMT_NONE,
@@ -2976,6 +2979,9 @@ const FFCodec ff_vp8_decoder = {
 #endif
 #if CONFIG_VP8_NVDEC_HWACCEL
                                HWACCEL_NVDEC(vp8),
+#endif
+#if CONFIG_VP8_V4L2REQUEST_HWACCEL
+                               HWACCEL_V4L2REQUEST(vp8),
 #endif
                                NULL
                            },

thirdparty/ffmpeg/libavcodec/vp9.c

@@ -168,6 +168,7 @@ static int update_size(AVCodecContext *avctx, int w, int h)
                      CONFIG_VP9_D3D11VA_HWACCEL * 2 + \
                      CONFIG_VP9_D3D12VA_HWACCEL + \
                      CONFIG_VP9_NVDEC_HWACCEL + \
+                     CONFIG_VP9_V4L2REQUEST_HWACCEL + \
                      CONFIG_VP9_VAAPI_HWACCEL + \
                      CONFIG_VP9_VDPAU_HWACCEL + \
                      CONFIG_VP9_VIDEOTOOLBOX_HWACCEL + \
@@ -213,6 +214,9 @@ static int update_size(AVCodecContext *avctx, int w, int h)
 #endif
 #if CONFIG_VP9_VULKAN_HWACCEL
             *fmtp++ = AV_PIX_FMT_VULKAN;
+#endif
+#if CONFIG_VP9_V4L2REQUEST_HWACCEL
+            *fmtp++ = AV_PIX_FMT_DRM_PRIME;
 #endif
             break;
         case AV_PIX_FMT_YUV420P12:
@@ -1958,6 +1962,9 @@ const FFCodec ff_vp9_decoder = {
 #endif
 #if CONFIG_VP9_VULKAN_HWACCEL
                                HWACCEL_VULKAN(vp9),
+#endif
+#if CONFIG_VP9_V4L2REQUEST_HWACCEL
+                               HWACCEL_V4L2REQUEST(vp9),
 #endif
                                NULL
                            },

thirdparty/ffmpeg/libavutil/Makefile

@@ -52,6 +52,7 @@ HEADERS = adler32.h                                                     \
           hwcontext_mediacodec.h                                        \
           hwcontext_opencl.h                                            \
           hwcontext_oh.h                                                \
+          hwcontext_v4l2request.h                                       \
           hwcontext_vaapi.h                                             \
           hwcontext_videotoolbox.h                                      \
           hwcontext_vdpau.h                                             \
@@ -216,6 +217,7 @@ OBJS-$(CONFIG_MEDIACODEC)               += hwcontext_mediacodec.o
 OBJS-$(CONFIG_OHCODEC)                  += hwcontext_oh.o
 OBJS-$(CONFIG_OPENCL)                   += hwcontext_opencl.o
 OBJS-$(CONFIG_QSV)                      += hwcontext_qsv.o
+OBJS-$(CONFIG_V4L2_REQUEST)             += hwcontext_v4l2request.o
 OBJS-$(CONFIG_VAAPI)                    += hwcontext_vaapi.o
 OBJS-$(CONFIG_VIDEOTOOLBOX)             += hwcontext_videotoolbox.o
 OBJS-$(CONFIG_VDPAU)                    += hwcontext_vdpau.o
@@ -247,6 +249,8 @@ SKIPHEADERS-$(CONFIG_AMF)              += hwcontext_amf.h               \
                                           hwcontext_amf_internal.h
 SKIPHEADERS-$(CONFIG_QSV)              += hwcontext_qsv.h
 SKIPHEADERS-$(CONFIG_OPENCL)           += hwcontext_opencl.h
+SKIPHEADERS-$(CONFIG_V4L2_REQUEST)     += hwcontext_v4l2request.h       \
+                                          hwcontext_v4l2request_internal.h
 SKIPHEADERS-$(CONFIG_VAAPI)            += hwcontext_vaapi.h
 SKIPHEADERS-$(CONFIG_VIDEOTOOLBOX)     += hwcontext_videotoolbox.h
 SKIPHEADERS-$(CONFIG_VDPAU)            += hwcontext_vdpau.h

thirdparty/ffmpeg/libavutil/Makefile.orig

@@ -0,0 +1,333 @@
+NAME = avutil
+DESC = FFmpeg utility library
+
+HEADERS = adler32.h                                                     \
+          aes.h                                                         \
+          aes_ctr.h                                                     \
+          ambient_viewing_environment.h                                 \
+          attributes.h                                                  \
+          audio_fifo.h                                                  \
+          avassert.h                                                    \
+          avstring.h                                                    \
+          avutil.h                                                      \
+          base64.h                                                      \
+          blowfish.h                                                    \
+          bprint.h                                                      \
+          bswap.h                                                       \
+          buffer.h                                                      \
+          cast5.h                                                       \
+          camellia.h                                                    \
+          channel_layout.h                                              \
+          common.h                                                      \
+          container_fifo.h                                              \
+          cpu.h                                                         \
+          crc.h                                                         \
+          csp.h                                                         \
+          des.h                                                         \
+          detection_bbox.h                                              \
+          dict.h                                                        \
+          display.h                                                     \
+          dovi_meta.h                                                   \
+          downmix_info.h                                                \
+          encryption_info.h                                             \
+          error.h                                                       \
+          eval.h                                                        \
+          executor.h                                                    \
+          fifo.h                                                        \
+          file.h                                                        \
+          film_grain_params.h                                           \
+          frame.h                                                       \
+          hash.h                                                        \
+          hdr_dynamic_metadata.h                                        \
+          hdr_dynamic_vivid_metadata.h                                  \
+          hmac.h                                                        \
+          hwcontext.h                                                   \
+          hwcontext_cuda.h                                              \
+          hwcontext_d3d11va.h                                           \
+          hwcontext_d3d12va.h                                           \
+          hwcontext_drm.h                                               \
+          hwcontext_dxva2.h                                             \
+          hwcontext_amf.h                                               \
+          hwcontext_qsv.h                                               \
+          hwcontext_mediacodec.h                                        \
+          hwcontext_opencl.h                                            \
+          hwcontext_oh.h                                                \
+          hwcontext_vaapi.h                                             \
+          hwcontext_videotoolbox.h                                      \
+          hwcontext_vdpau.h                                             \
+          hwcontext_vulkan.h                                            \
+          iamf.h                                                        \
+          imgutils.h                                                    \
+          intfloat.h                                                    \
+          intreadwrite.h                                                \
+          lfg.h                                                         \
+          log.h                                                         \
+          lzo.h                                                         \
+          macros.h                                                      \
+          mathematics.h                                                 \
+          mastering_display_metadata.h                                  \
+          md5.h                                                         \
+          mem.h                                                         \
+          motion_vector.h                                               \
+          murmur3.h                                                     \
+          opt.h                                                         \
+          parseutils.h                                                  \
+          pixdesc.h                                                     \
+          pixelutils.h                                                  \
+          pixfmt.h                                                      \
+          random_seed.h                                                 \
+          raw_color_params.h                                            \
+          rc4.h                                                         \
+          rational.h                                                    \
+          refstruct.h                                                   \
+          replaygain.h                                                  \
+          ripemd.h                                                      \
+          samplefmt.h                                                   \
+          sha.h                                                         \
+          sha512.h                                                      \
+          spherical.h                                                   \
+          stereo3d.h                                                    \
+          tdrdi.h                                                       \
+          threadmessage.h                                               \
+          time.h                                                        \
+          timecode.h                                                    \
+          timestamp.h                                                   \
+          tree.h                                                        \
+          twofish.h                                                     \
+          uuid.h                                                        \
+          version.h                                                     \
+          video_enc_params.h                                            \
+          xtea.h                                                        \
+          tea.h                                                         \
+          tx.h                                                          \
+          video_hint.h
+
+ARCH_HEADERS = bswap.h                                                  \
+               intmath.h                                                \
+               intreadwrite.h                                           \
+               timer.h                                                  \
+
+BUILT_HEADERS = avconfig.h                                              \
+                ffversion.h
+
+OBJS = adler32.o                                                        \
+       aes.o                                                            \
+       aes_ctr.o                                                        \
+       ambient_viewing_environment.o                                    \
+       audio_fifo.o                                                     \
+       avstring.o                                                       \
+       avsscanf.o                                                       \
+       base64.o                                                         \
+       blowfish.o                                                       \
+       bprint.o                                                         \
+       buffer.o                                                         \
+       cast5.o                                                          \
+       camellia.o                                                       \
+       channel_layout.o                                                 \
+       container_fifo.o                                                 \
+       cpu.o                                                            \
+       crc.o                                                            \
+       csp.o                                                            \
+       des.o                                                            \
+       detection_bbox.o                                                 \
+       dict.o                                                           \
+       display.o                                                        \
+       dovi_meta.o                                                      \
+       downmix_info.o                                                   \
+       encryption_info.o                                                \
+       error.o                                                          \
+       eval.o                                                           \
+       executor.o                                                       \
+       fifo.o                                                           \
+       file.o                                                           \
+       file_open.o                                                      \
+       float_dsp.o                                                      \
+       float_scalarproduct.o                                            \
+       film_grain_params.o                                              \
+       fixed_dsp.o                                                      \
+       frame.o                                                          \
+       hash.o                                                           \
+       hdr_dynamic_metadata.o                                           \
+       hdr_dynamic_vivid_metadata.o                                     \
+       hmac.o                                                           \
+       hwcontext.o                                                      \
+       iamf.o                                                           \
+       imgutils.o                                                       \
+       integer.o                                                        \
+       intmath.o                                                        \
+       lfg.o                                                            \
+       lls.o                                                            \
+       log.o                                                            \
+       log2_tab.o                                                       \
+       lzo.o                                                            \
+       mathematics.o                                                    \
+       mastering_display_metadata.o                                     \
+       md5.o                                                            \
+       mem.o                                                            \
+       murmur3.o                                                        \
+       opt.o                                                            \
+       parseutils.o                                                     \
+       pixdesc.o                                                        \
+       pixelutils.o                                                     \
+       random_seed.o                                                    \
+       raw_color_params.o                                               \
+       rational.o                                                       \
+       refstruct.o                                                      \
+       reverse.o                                                        \
+       rc4.o                                                            \
+       ripemd.o                                                         \
+       samplefmt.o                                                      \
+       side_data.o                                                      \
+       sha.o                                                            \
+       sha512.o                                                         \
+       slicethread.o                                                    \
+       spherical.o                                                      \
+       stereo3d.o                                                       \
+       tdrdi.o                                                          \
+       threadmessage.o                                                  \
+       time.o                                                           \
+       timecode.o                                                       \
+       timecode_internal.o                                              \
+       timestamp.o                                                      \
+       tree.o                                                           \
+       twofish.o                                                        \
+       utils.o                                                          \
+       xga_font_data.o                                                  \
+       xtea.o                                                           \
+       tea.o                                                            \
+       tx.o                                                             \
+       tx_float.o                                                       \
+       tx_double.o                                                      \
+       tx_int32.o                                                       \
+       uuid.o                                                           \
+       version.o                                                        \
+       video_enc_params.o                                               \
+       video_hint.o                                                     \
+
+
+OBJS-$(CONFIG_CUDA)                     += hwcontext_cuda.o
+OBJS-$(CONFIG_D3D11VA)                  += hwcontext_d3d11va.o
+OBJS-$(CONFIG_D3D12VA)                  += hwcontext_d3d12va.o
+OBJS-$(CONFIG_DXVA2)                    += hwcontext_dxva2.o
+OBJS-$(CONFIG_AMF)                      += hwcontext_amf.o
+OBJS-$(CONFIG_LIBDRM)                   += hwcontext_drm.o
+OBJS-$(CONFIG_MACOS_KPERF)              += macos_kperf.o
+OBJS-$(CONFIG_MEDIACODEC)               += hwcontext_mediacodec.o
+OBJS-$(CONFIG_OHCODEC)                  += hwcontext_oh.o
+OBJS-$(CONFIG_OPENCL)                   += hwcontext_opencl.o
+OBJS-$(CONFIG_QSV)                      += hwcontext_qsv.o
+OBJS-$(CONFIG_VAAPI)                    += hwcontext_vaapi.o
+OBJS-$(CONFIG_VIDEOTOOLBOX)             += hwcontext_videotoolbox.o
+OBJS-$(CONFIG_VDPAU)                    += hwcontext_vdpau.o
+OBJS-$(CONFIG_VULKAN)                   += hwcontext_vulkan.o vulkan.o
+
+OBJS-$(!CONFIG_VULKAN)                  += hwcontext_stub.o
+
+OBJS += $(COMPAT_OBJS:%=../compat/%)
+
+# Object files to satisfy dependencies of other libraries for static builds
+STLIBOBJS-$(CONFIG_EXR_DECODER)         += half2float.o float2half.o
+STLIBOBJS-$(CONFIG_EXR_ENCODER)         += float2half.o
+STLIBOBJS-$(CONFIG_PHM_DECODER)         += half2float.o
+STLIBOBJS-$(CONFIG_PHM_ENCODER)         += float2half.o
+STLIBOBJS-$(CONFIG_SWSCALE)             += half2float.o
+
+# Windows resource file
+SHLIBOBJS-$(HAVE_GNU_WINDRES)           += avutilres.o
+
+SKIPHEADERS                            += objc.h
+SKIPHEADERS-$(CONFIG_ZLIB)             += zlib_utils.h
+SKIPHEADERS-$(HAVE_CUDA_H)             += hwcontext_cuda.h
+SKIPHEADERS-$(CONFIG_CUDA)             += hwcontext_cuda_internal.h     \
+                                          cuda_check.h
+SKIPHEADERS-$(CONFIG_D3D11VA)          += hwcontext_d3d11va.h
+SKIPHEADERS-$(CONFIG_D3D12VA)          += hwcontext_d3d12va.h
+SKIPHEADERS-$(CONFIG_DXVA2)            += hwcontext_dxva2.h
+SKIPHEADERS-$(CONFIG_AMF)              += hwcontext_amf.h               \
+                                          hwcontext_amf_internal.h
+SKIPHEADERS-$(CONFIG_QSV)              += hwcontext_qsv.h
+SKIPHEADERS-$(CONFIG_OPENCL)           += hwcontext_opencl.h
+SKIPHEADERS-$(CONFIG_VAAPI)            += hwcontext_vaapi.h
+SKIPHEADERS-$(CONFIG_VIDEOTOOLBOX)     += hwcontext_videotoolbox.h
+SKIPHEADERS-$(CONFIG_VDPAU)            += hwcontext_vdpau.h
+SKIPHEADERS-$(CONFIG_VULKAN)           += hwcontext_vulkan.h vulkan.h   \
+                                          vulkan_functions.h            \
+                                          vulkan_loader.h
+SKIPHEADERS-$(CONFIG_SHADER_COMPRESSION) += zlib_utils.h
+
+TESTPROGS = adler32                                                     \
+            aes                                                         \
+            aes_ctr                                                     \
+            ambient_viewing_environment                                 \
+            audio_fifo                                                  \
+            avstring                                                    \
+            base64                                                      \
+            blowfish                                                    \
+            bprint                                                      \
+            buffer                                                      \
+            cast5                                                       \
+            camellia                                                    \
+            channel_layout                                              \
+            color_utils                                                 \
+            cpu                                                         \
+            crc                                                         \
+            csp                                                         \
+            des                                                         \
+            detection_bbox                                              \
+            dict                                                        \
+            display                                                     \
+            encryption_info                                             \
+            error                                                       \
+            eval                                                        \
+            file                                                        \
+            fifo                                                        \
+            film_grain_params                                           \
+            hash                                                        \
+            hdr_dynamic_vivid_metadata                                  \
+            hmac                                                        \
+            hwdevice                                                    \
+            integer                                                     \
+            imgutils                                                    \
+            lfg                                                         \
+            lls                                                         \
+            log                                                         \
+            mathematics                                                 \
+            md5                                                         \
+            murmur3                                                     \
+            opt                                                         \
+            pca                                                         \
+            parseutils                                                  \
+            pixdesc                                                     \
+            pixelutils                                                  \
+            pixfmt_best                                                 \
+            random_seed                                                 \
+            rational                                                    \
+            rc4                                                         \
+            ripemd                                                      \
+            sha                                                         \
+            sha512                                                      \
+            samplefmt                                                   \
+            side_data_array                                             \
+            softfloat                                                   \
+            spherical                                                   \
+            stereo3d                                                    \
+            tdrdi                                                       \
+            timecode                                                    \
+            timestamp                                                   \
+            tree                                                        \
+            twofish                                                     \
+            utf8                                                        \
+            uuid                                                        \
+            video_enc_params                                            \
+            xtea                                                        \
+            tea                                                         \
+
+TESTPROGS-$(HAVE_THREADS)            += cpu_init
+TESTPROGS-$(HAVE_LZO1X_999_COMPRESS) += lzo
+
+TOOLS = crypto_bench ffhash ffeval ffescape
+
+tools/crypto_bench$(EXESUF): ELIBS += $(if $(VERSUS),$(subst +, -l,+$(VERSUS)),)
+tools/crypto_bench.o: CFLAGS += -DUSE_EXT_LIBS=0$(if $(VERSUS),$(subst +,+USE_,+$(VERSUS)),)
+
+$(SUBDIR)tests/lzo$(EXESUF): ELIBS = -llzo2

thirdparty/ffmpeg/libavutil/hwcontext.c

@@ -71,6 +71,9 @@ static const HWContextType * const hw_table[] = {
 #endif
 #if CONFIG_OHCODEC
     &ff_hwcontext_type_oh,
+#endif
+#if CONFIG_V4L2_REQUEST
+    &ff_hwcontext_type_v4l2request,
 #endif
     NULL,
 };
@@ -83,6 +86,7 @@ static const char *const hw_type_names[] = {
     [AV_HWDEVICE_TYPE_D3D12VA] = "d3d12va",
     [AV_HWDEVICE_TYPE_OPENCL] = "opencl",
     [AV_HWDEVICE_TYPE_QSV]    = "qsv",
+    [AV_HWDEVICE_TYPE_V4L2REQUEST] = "v4l2request",
     [AV_HWDEVICE_TYPE_VAAPI]  = "vaapi",
     [AV_HWDEVICE_TYPE_VDPAU]  = "vdpau",
     [AV_HWDEVICE_TYPE_VIDEOTOOLBOX] = "videotoolbox",

thirdparty/ffmpeg/libavutil/hwcontext.h

@@ -41,6 +41,7 @@ enum AVHWDeviceType {
     AV_HWDEVICE_TYPE_AMF,
     /* OpenHarmony Codec device */
     AV_HWDEVICE_TYPE_OHCODEC,
+    AV_HWDEVICE_TYPE_V4L2REQUEST,
 };
 
 /**

thirdparty/ffmpeg/libavutil/hwcontext_internal.h

@@ -158,6 +158,7 @@ extern const HWContextType ff_hwcontext_type_drm;
 extern const HWContextType ff_hwcontext_type_dxva2;
 extern const HWContextType ff_hwcontext_type_opencl;
 extern const HWContextType ff_hwcontext_type_qsv;
+extern const HWContextType ff_hwcontext_type_v4l2request;
 extern const HWContextType ff_hwcontext_type_vaapi;
 extern const HWContextType ff_hwcontext_type_vdpau;
 extern const HWContextType ff_hwcontext_type_videotoolbox;

thirdparty/ffmpeg/libavutil/hwcontext_v4l2request.h

@@ -0,0 +1,70 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_HWCONTEXT_V4L2REQUEST_H
+#define AVUTIL_HWCONTEXT_V4L2REQUEST_H
+
+#include <stdint.h>
+#include <linux/videodev2.h>
+
+/**
+ * @file
+ * An API-specific header for AV_HWDEVICE_TYPE_V4L2REQUEST.
+ */
+
+typedef struct AVV4L2RequestFramesContextInternal AVV4L2RequestFramesContextInternal;
+
+/**
+ * V4L2 Request API frames context.
+ *
+ * This struct is allocated as AVHWFramesContext.hwctx
+ */
+typedef struct AVV4L2RequestFramesContext {
+    /**
+     * Internal context for the initialized V4L2 stateless decoder/encoder session.
+     */
+    AVV4L2RequestFramesContextInternal *internal;
+
+    /**
+     * V4L2_PIX_FMT_* coded pixel format to set on the OUTPUT queue (decoders)
+     * or the CAPTURE queue (encoders) during initialization.
+     *
+     * This field must be set by caller before av_hwframe_ctx_init() is called.
+     */
+    uint32_t pixelformat;
+
+    /**
+     * Optional bit depth of the frame pixel format, e.g. 8 or 10.
+     *
+     * This field should be set by caller before av_hwframe_ctx_init() is called,
+     * the field will be updated to match the selected frame pixel format after
+     * successful initialization.
+     */
+    uint32_t bit_depth;
+
+    /**
+     * Optional codec-specific extended controls to be set during initialization.
+     *
+     * These fields should be set by caller before av_hwframe_ctx_init() is called,
+     * fields are reset to NULL and 0 after successful initialization.
+     */
+    struct v4l2_ext_control *init_controls;
+    int nb_init_controls;
+} AVV4L2RequestFramesContext;
+
+#endif /* AVUTIL_HWCONTEXT_V4L2REQUEST_H */

thirdparty/ffmpeg/libavutil/hwcontext_v4l2request_internal.h

@@ -0,0 +1,67 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_HWCONTEXT_V4L2REQUEST_INTERNAL_H
+#define AVUTIL_HWCONTEXT_V4L2REQUEST_INTERNAL_H
+
+#include "buffer.h"
+#include "hwcontext_v4l2request.h"
+
+/**
+ * @file
+ * FFmpeg internal API-specific header for AV_HWDEVICE_TYPE_V4L2REQUEST.
+ */
+
+/**
+ * Internal context for the initialized V4L2 stateless decoder/encoder session.
+ */
+struct AVV4L2RequestFramesContextInternal {
+    /**
+     * Media device file descriptor of the initialized session.
+     */
+    int media_fd;
+
+    /**
+     * Video device file descriptor of the initialized session.
+     */
+    int video_fd;
+
+    /**
+     * Details of the initialized CAPTURE and OUTPUT queues.
+     */
+    struct {
+        /**
+         * V4L2 buffer format.
+         */
+        struct v4l2_format format;
+
+        /**
+         * V4L2 buffer capabilities flags.
+         */
+        uint32_t capabilities;
+
+        /**
+        * Buffer pool of allocated V4L2 buffers.
+        *
+        * AVBufferRef.data points to a struct v4l2_buffer for the created buffer.
+        */
+        AVBufferPool *pool;
+    } capture, output;
+};
+
+#endif /* AVUTIL_HWCONTEXT_V4L2REQUEST_INTERNAL_H */