New sound effects mixer. Odd audio stumbling issue.

joeylib/joeylib.pro

@@ -2,6 +2,7 @@ JOEY = /home/scott/joey
 #CONFIG += SDL12
 CONFIG += SDL2
 
+BREW = /home/linuxbrew/.linuxbrew
 
 TEMPLATE = app
 CONFIG += console
@@ -9,9 +10,23 @@ CONFIG -= \
 	app_bundle \
 	qt
 
-QMAKE_CFLAGS += \
+defined(BREW,var) {
-	-I$$PWD/src \
+	# Use Homebrew libraries.
-	-D_REENTRANT
+	STATICLIB = $$BREW/lib
+	INCLUDEPATH += $$BREW/include
+	LIBS += \
+		-L$$STATICLIB \
+		-Wl,-rpath,$$STATICLIB
+} else {
+	# Use our libraries.
+	STATICLIB = $$JOEY/sdks/linux/x64/lib
+	INCLUDEPATH += $$JOEY/sdks/linux/x64/include
+	LIBS += \
+		-L$$STATICLIB \
+		-Wl,-rpath,$$STATICLIB
+}
+
+INCLUDEPATH += $$PWD/src
 
 HEADERS += \
 	src/3rdparty/memwatch/memwatch.h \
@@ -25,15 +40,11 @@ SOURCES += \
 	src/test.c
 
 SDL12 {
-	INCLUDEPATH += $$JOEY/sdks/linux/x64/include
-
 	SOURCES += \
 		src/jPixBuf.c \
 		src/jSDL12.c
 
 	LIBS += \
-		-L$$JOEY/sdks/linux/x64/lib \
-		-Wl,-rpath,$$JOEY/sdks/linux/x64/lib \
 		-lSDL \
 		-lm \
 		-ldl \
@@ -41,7 +52,9 @@ SDL12 {
 }
 
 SDL2 {
-	INCLUDEPATH += $$JOEY/sdks/linux/x64/include
+	QMAKE_CFLAGS += \
+		-Wall \
+		-D_REENTRANT
 
 	HEADERS += \
 		src/3rdparty/pocketmod/pocketmod.h
@@ -51,14 +64,10 @@ SDL2 {
 		src/jSDL2.c
 
 	LIBS += \
-		-L$$JOEY/sdks/linux/x64/lib \
 		-Wl,--enable-new-dtags \
-		-lSDL2 \
+		-lSDL2
-		-Wl,--no-undefined \
+#		$$STATICLIB/libSDL2.a \
-		-lm \
+#		-lm -ldl -lX11 -lXext -lXcursor -lXi -lXfixes -lXrandr -lXss -lpthread -lrt
-		-ldl \
-		-lpthread \
-		-lrt
 }
 
 OTHER_FILES += \
@@ -68,11 +77,3 @@ OTHER_FILES += \
 	src/jIIgs.asm \
 	src/jIIgs.macro \
 	joey.pri
-
-dmalloc {
-	DEFINES += DMALLOC
-	INCLUDEPATH += /opt/dmalloc/include
-	LIBS += \
-		-L/opt/dmalloc/lib \
-		-ldmallocth
-}

joeylib/src/jSDL2.c

@@ -75,6 +75,7 @@ static jbool                _jlModPlaying        = jfalse;
 static jlPlatformModT      *_jlModCurrent        = NULL;
 static jbyte                _jlModVolume         = 255;
 static jlSoundPlayingT     *_jlSoundList         = NULL;
+static jbyte                _jlSoundsPlaying     = 0;
 
 
 static Uint32 _jlUtilTimer(Uint32 interval, void *param);
@@ -167,10 +168,7 @@ static void _jlAudioCallback(void *userdata, Uint8 *buffer, int bytes) {
 	float           *out              = NULL;
 	float            adjust           = 1;
 	double           work             = 0;
-	uint8_t         *mix              = NULL;
 	jbool            isRight          = jfalse;
-	static uint8_t  *samples          = NULL;
-	static uint32_t  sampleBufferSize = 0;
 
 	(void)userdata;
 
@@ -184,54 +182,40 @@ static void _jlAudioCallback(void *userdata, Uint8 *buffer, int bytes) {
 		}
 		// Adjust volume.
 		adjust = ((100.0 / 255.0) * (float)_jlModVolume) * 0.01;
-		data   = (float *)buffer;
+		out    = (float *)buffer;
 		for (i=0; i<(int)(bytes / sizeof(float)); i+=2) {
-			data[i]     *= adjust;
+			out[i]     *= adjust;
-			data[i + 1] *= adjust;
+			out[i + 1] *= adjust;
-		}
-	}
-
-	// Create a sample buffer for manipulating sound effects.
-	if (sampleBufferSize < (uint32_t)bytes) {
-		if (samples) jlFree(samples);
-		samples = jlMalloc(bytes);
-		if (samples) {
-			sampleBufferSize = bytes;
-		} else {
-			sampleBufferSize = 0;
 		}
 	}
 
 	// Mix in sounds.
+	// Just adding samples together seems fine for floating point data.
+	// For integers, we need to clamp.
 	if (_jlSoundList) {
 		sound = _jlSoundList;
 		while (sound) {
+			// Find length of data to mix.
 			length = ((uint32_t)bytes > sound->len) ? sound->len : (uint32_t)bytes;
-			// If we have a sample buffer, move sound to desired channel.
+			// Adjust volume.
-			if (samples) {
+			adjust = ((100.0 / 255.0) * (float)sound->volume) * 0.01;
-				mix  = samples;
+			// Point at sample data.
-				out  = (float *)samples;
+			data = (float *)sound->buffer;
-				data = (float *)sound->buffer;
+			out  = (float *)buffer;
-				for (i=0; i<(int)(length / sizeof(float)); i+=2) {
+			for (i=0; i<(int)(length / sizeof(float)); i+=2) {
-					// Combine channels into a mono sample.
+				// Combine channels into a mono sample.
-					work = (data[i] + data[i + 1]) * 0.5;
+				work = (data[i] + data[i + 1]) * 0.5;
-					// Determine channel.
+				// Determine channel.
-					isRight = (sound->channel & 0x01);
+				isRight = (sound->channel & 0x01);
-					if (_jlSwapChannels) isRight = !isRight;
+				if (_jlSwapChannels) isRight = !isRight;
-					if (isRight) {
+				if (isRight) {
-						// Move sound into right channel.
+					// Place sound in the right channel.
-						out[i]     = 0;
+					out[i + 1] += (work * adjust);
-						out[i + 1] = work;
+				} else {
-					} else {
+					// Place sound in left channel.
-						// Move sound into left channel.
+					out[i] += (work * adjust);
-						out[i]     = work;
-						out[i + 1] = 0;
-					}
 				}
-			} else {
-				mix = sound->buffer;
 			}
-			SDL_MixAudioFormat(buffer, mix, AUDIO_FORMAT, length, sound->volume * 0.5);
 			sound->buffer += length;
 			sound->len    -= length;
 			// Are we done with this sound?
@@ -244,26 +228,33 @@ static void _jlAudioCallback(void *userdata, Uint8 *buffer, int bytes) {
 				temp  = sound;
 				sound = sound->next;
 				jlFree(temp);
+				_jlSoundsPlaying--;
 			} else {
 				prev  = sound;
 				sound = sound->next;
 			}
 		}
 	}
+
+	jlUtilSay("");
 }
 
 
 void jlDisplayPresent(void) {
+	int     i         = 0;
+	int     j         = 0;
+	int     pitch     = 0;
+	void   *pixelData = NULL;
+	Uint32 *pixels    = NULL;
+
 	// Render 4 bit copy to proper pixel format.
 	// This extra step preserves palette effects.
 	//***TODO*** Fake border colors on PC
-	int   i         = 0;
+
-	int   j         = 0;
-	int   pitch     = 0;
-	void *pixelData = NULL;
 	jlUtilIdle();
+
 	SDL_LockTexture(_jlTexture, NULL, &pixelData, &pitch);
-	Uint32    *pixels = (Uint32 *)pixelData;
+	pixels = (Uint32 *)pixelData;
 	for (int y=0; y<200; y++) {
 		for (int x=0; x<160; x++) {
 			// We decode this R/L instead of L/R for some reason.  NO idea why yet.  Endians?
@@ -512,7 +503,8 @@ jbool _jlSoundLoad(jlSoundT **sound, char *filename) {
 						memcpy(soundPlatform->data, cvt.buf, soundPlatform->len);
 						result = jtrue;
 					}
-					jlFree(cvt.buf);
+					data = cvt.buf;  // This prevents a warning about taking the address of a packed struct.
+					jlFree(data);
 				}
 			} else {
 				// No.  Use as-is.
@@ -527,9 +519,7 @@ jbool _jlSoundLoad(jlSoundT **sound, char *filename) {
 		}
 	}
 
-	if (!result) {
+	if (!result && soundPlatform) jlFree(soundPlatform);
-		if (soundPlatform) jlFree(soundPlatform);
-	}
 
 	return result;
 }
@@ -548,6 +538,7 @@ void jlSoundPlay(jlSoundT *sound, jlSoundChannelE channel, jbyte volume) {
 		sp->len      = sp->sound->len;
 		sp->next     = _jlSoundList;
 		_jlSoundList = sp;
+		_jlSoundsPlaying++;
 		SDL_UnlockAudioDevice(_jlAudioDevice);
 	}
 }
@@ -571,6 +562,7 @@ void jlSoundStop(jlSoundT *sound) {
 			temp = cur;
 			cur  = cur->next;
 			jlFree(temp);
+			_jlSoundsPlaying--;
 		} else {
 			prev = cur;
 			cur  = cur->next;
@@ -616,6 +608,7 @@ char _jlUtilIdleCheckKey(int sym) {
 
 void jlUtilIdle(void) {
 	SDL_Event event;
+
 	while (SDL_PollEvent(&event)) {
 		switch(event.type) {
 			case SDL_KEYDOWN:
@@ -658,6 +651,8 @@ void jlUtilIdle(void) {
 				_jlIsRunning = jfalse;
 				break;
 		}
+
+		SDL_Delay(1);
 	}
 
 	//printf("Keys down:  %d\n", _jlNumKeysDown);
@@ -739,9 +734,7 @@ int main(int argc, char *argv[]) {
 		jPixBufStop();
 
 		SDL_RemoveTimer(_jlTimerId);
-		for (x=0; x<_jlControllerCount; x++) {
+		for (x=0; x<_jlControllerCount; x++) SDL_GameControllerClose(_jlControllers[x]);
-			SDL_GameControllerClose(_jlControllers[x]);
-		}
 		_jlControllerCount = 0;
 		jlFree(_jlControllers);
 		SDL_PauseAudioDevice(_jlAudioDevice, 1);