97 lines
2.8 KiB
C
97 lines
2.8 KiB
C
/*
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* video_out_sdl.c
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*
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* Copyright (C) 2000-2002 Ryan C. Gordon <icculus@lokigames.com> and
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* Dominik Schnitzer <aeneas@linuxvideo.org>
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*
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* SDL info, source, and binaries can be found at http://www.libsdl.org/
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*
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* This file is part of mpeg2dec, a free MPEG-2 video stream decoder.
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* See http://libmpeg2.sourceforge.net/ for updates.
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*
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* mpeg2dec is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* mpeg2dec is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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//#include "config.h"
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#include <inttypes.h>
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#include "video_out.h"
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#include "interface_940.h"
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extern struct libmpeg2_shared_vars_s *g_pShared;
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// we expect this function to get called 3 times
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static void vo940_setup_fbuf (vo_instance_t * _instance,
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uint8_t ** buf, void ** id)
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{
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static unsigned int uWhichBuf = 0;
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buf[0] = g_pShared->outBuf[uWhichBuf][0];
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buf[1] = g_pShared->outBuf[uWhichBuf][1];
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buf[2] = g_pShared->outBuf[uWhichBuf][2];
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// id will refer to the buffer index
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*id = (void *) uWhichBuf;
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uWhichBuf++;
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// wraparound (this should never happen, because this function should only be called 3 times)
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uWhichBuf = uWhichBuf % OUTBUFCOUNT;
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}
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static void vo940_draw_frame (vo_instance_t * _instance,
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uint8_t * const * buf, void * id)
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{
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// indicate which buffer has the new frame
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g_pShared->uAckOutBuf = (unsigned int) id;
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// tell cpu1 that we have a new frame
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g_pShared->uAckFrameCount = (g_pShared->uAckFrameCount + 1);
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// wait for CPU1 to get the new frame
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while (g_pShared->uReqFrameCount != g_pShared->uAckFrameCount)
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{
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}
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}
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static int vo940_setup (vo_instance_t * _instance, int width, int height,
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vo_setup_result_t * result)
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{
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g_pShared->uOutX = width;
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g_pShared->uOutY = height;
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result->convert = NULL;
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return 0;
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}
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// don't want to use malloc, because the 2nd cpu doesn't have this function
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vo_instance_t g_vo940_instance;
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vo_instance_t * vo940_open (void)
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{
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vo_instance_t *instance = &g_vo940_instance;
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instance->setup = vo940_setup;
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instance->setup_fbuf = vo940_setup_fbuf;
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instance->set_fbuf = NULL;
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instance->start_fbuf = NULL;
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instance->discard = NULL;
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instance->draw = vo940_draw_frame;
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instance->close = NULL;
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return (vo_instance_t *) instance;
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}
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