BGameSound: cleanup and several fixes

* Use a template to avoid repeating the panning code for each type
* Rearrange the initialization of BSimpleGameSound so the data is only
copied 0 or 1 times (it was copied 2 or 3 times in some cases) between
the passed buffer and the final one,
* Don't execute the panning code on streams with only 1 channel as this
makes no sense and it will read and write outside the buffers
* Abort early in GameSoundBuffer::Play if fIsPlaying is false.

Fix the crashes in Worms Armageddon. Doesn't fix the sounds being mostly
white noise.

src/kits/game/GameSoundBuffer.cpp

@@ -44,35 +44,12 @@
 
 
 // Sound Buffer Utility functions ----------------------------------------
-inline void
-ApplyMod(uint8 * data, uint8 * buffer, int64 index, float gain, float * pan)
+template<typename T>
+static inline void
+ApplyMod(T* data, T* buffer, int64 index, float * pan)
 {
-	data[index * 2] += uint8(float(buffer[index * 2]) * gain * pan[0]);
-	data[index * 2 + 1] += uint8(float(buffer[index * 2 + 1]) * gain * pan[1]);
-}
-
-
-inline void
-ApplyMod(int16 * data, int16 * buffer, int32 index, float gain, float * pan)
-{
-	data[index * 2] = int16(float(buffer[index * 2]) * gain * pan[0]);
-	data[index * 2 + 1] = int16(float(buffer[index * 2 + 1]) * gain * pan[1]);
-}
-
-
-inline void
-ApplyMod(int32 * data, int32 * buffer, int32 index, float gain, float * pan)
-{
-	data[index * 2] += int32(float(buffer[index * 2]) * gain * pan[0]);
-	data[index * 2 + 1] += int32(float(buffer[index * 2 + 1]) * gain * pan[1]);
-}
-
-
-inline void
-ApplyMod(float * data, float * buffer, int32 index, float gain, float * pan)
-{
-	data[index * 2] += buffer[index * 2] * gain * pan[0];
-	data[index * 2 + 1] += buffer[index * 2 + 1] * gain * pan[1];
+	data[index * 2] += T(float(buffer[index * 2]) * pan[0]);
+	data[index * 2 + 1] += T(float(buffer[index * 2 + 1]) * pan[1]);
 }
 
 
@@ -94,7 +71,7 @@ GameSoundBuffer::GameSoundBuffer(const gs_audio_format * format)
 
 	fFrameSize = get_sample_size(format->format) * format->channel_count;
 
-	memcpy(&fFormat, format, sizeof(gs_audio_format));
+	fFormat = *format;
 }
 
 
@@ -245,7 +222,7 @@ GameSoundBuffer::SetAttributes(gs_attribute * attributes,
 	status_t error = B_OK;
 
 	for (size_t i = 0; i < attributeCount; i++) {
-		switch(attributes[i].attribute) {
+		switch (attributes[i].attribute) {
 			case B_GS_GAIN:
 				error = SetGain(attributes[i].value, attributes[i].duration);
 				break;
@@ -270,9 +247,14 @@ GameSoundBuffer::SetAttributes(gs_attribute * attributes,
 void
 GameSoundBuffer::Play(void * data, int64 frames)
 {
+	// Mh... should we add some locking?
+	if (!fIsPlaying)
+		return;
+
+	if (fFormat.channel_count == 2) {
 		float pan[2];
-	pan[0] = fPanRight;
-	pan[1] = fPanLeft;
+		pan[0] = fPanRight * fGain;
+		pan[1] = fPanLeft * fGain;
 
 		char * buffer = new char[fFrameSize * frames];
 
@@ -282,7 +264,7 @@ GameSoundBuffer::Play(void * data, int64 frames)
 			case gs_audio_format::B_GS_U8:
 			{
 				for (int64 i = 0; i < frames; i++) {
-				ApplyMod((uint8*)data, (uint8*)buffer, i, fGain, pan);
+					ApplyMod((uint8*)data, (uint8*)buffer, i, pan);
 					UpdateMods();
 				}
 
@@ -292,7 +274,7 @@ GameSoundBuffer::Play(void * data, int64 frames)
 			case gs_audio_format::B_GS_S16:
 			{
 				for (int64 i = 0; i < frames; i++) {
-				ApplyMod((int16*)data, (int16*)buffer, i, fGain, pan);
+					ApplyMod((int16*)data, (int16*)buffer, i, pan);
 					UpdateMods();
 				}
 
@@ -302,7 +284,7 @@ GameSoundBuffer::Play(void * data, int64 frames)
 			case gs_audio_format::B_GS_S32:
 			{
 				for (int64 i = 0; i < frames; i++) {
-				ApplyMod((int32*)data, (int32*)buffer, i, fGain, pan);
+					ApplyMod((int32*)data, (int32*)buffer, i, pan);
 					UpdateMods();
 				}
 
@@ -312,15 +294,23 @@ GameSoundBuffer::Play(void * data, int64 frames)
 			case gs_audio_format::B_GS_F:
 			{
 				for (int64 i = 0; i < frames; i++) {
-				ApplyMod((float*)data, (float*)buffer, i, fGain, pan);
+					ApplyMod((float*)data, (float*)buffer, i, pan);
 					UpdateMods();
 				}
 
 				break;
 			}
 		}
-
 		delete[] buffer;
+	} else if (fFormat.channel_count == 1) {
+		// FIXME the output should be stereo, and we could pan mono sounds
+		// here. But currently the output has the same number of channels as
+		// the sound and we can't do this.
+		// FIXME also, we don't handle the gain here.
+		FillBuffer(data, frames);
+	} else
+		debugger("Invalid number of channels.");
+
 }
 
 
@@ -353,7 +343,7 @@ GameSoundBuffer::UpdateMods()
 }
 
 
-void
+	void
 GameSoundBuffer::Reset()
 {
 	fGain = 1.0;
@@ -492,9 +482,7 @@ SimpleSoundBuffer::SimpleSoundBuffer(const gs_audio_format * format,
 	fPosition(0)
 {
 	fBufferSize = frames * fFrameSize;
-	fBuffer = new char[fBufferSize];
-
-	memcpy(fBuffer, data, fBufferSize);
+	fBuffer = (char*)data;
 }
 
 

src/kits/game/GameSoundDevice.cpp

@@ -150,10 +150,8 @@ BGameSoundDevice::CreateBuffer(gs_id* sound, const gs_audio_format* format,
 	int32 position = AllocateSound();
 
 	if (position >= 0) {
-		media_node systemMixer;
-		BMediaRoster::Roster()->GetAudioMixer(&systemMixer);
 		fSounds[position] = new SimpleSoundBuffer(format, data, frames);
-		err = fSounds[position]->Connect(&systemMixer);
+		err = B_OK;
 	}
 
 	if (err == B_OK)
@@ -174,11 +172,9 @@ BGameSoundDevice::CreateBuffer(gs_id* sound, const void* object,
 	int32 position = AllocateSound();
 
 	if (position >= 0) {
-		media_node systemMixer;
-		BMediaRoster::Roster()->GetAudioMixer(&systemMixer);
 		fSounds[position] = new StreamingSoundBuffer(format, object,
 			inBufferFrameCount, inBufferCount);
-		err = fSounds[position]->Connect(&systemMixer);
+		err = B_OK;
 	}
 
 	if (err == B_OK)
@@ -228,6 +224,9 @@ BGameSoundDevice::StartPlaying(gs_id sound)
 		return B_BAD_VALUE;
 
 	if (!fSounds[sound - 1]->IsPlaying()) {
+		media_node systemMixer;
+		BMediaRoster::Roster()->GetAudioMixer(&systemMixer);
+		fSounds[sound - 1]->Connect(&systemMixer);
 		// tell the producer to start playing the sound
 		return fSounds[sound - 1]->StartPlaying();
 	}

src/kits/game/SimpleGameSound.cpp

@@ -51,8 +51,15 @@ BSimpleGameSound::BSimpleGameSound(const void *inData, size_t inFrameCount,
 	:
 	BGameSound(device)
 {
-	if (InitCheck() == B_OK)
-		SetInitError(Init(inData, inFrameCount, format));
+	if (InitCheck() != B_OK)
+		return;
+
+	size_t frameSize
+		= get_sample_size(format->format) * format->channel_count;
+	uchar * data = new uchar[inFrameCount * frameSize];
+	memcpy(data, inData, inFrameCount * frameSize);
+
+	SetInitError(Init(data, inFrameCount, format));
 }
 
 
@@ -177,14 +184,13 @@ BSimpleGameSound::Init(const entry_ref* inFile)
 
 			framesTotal += framesRead;
 		}
+		delete [] buffer;
 
 		gsformat.format = gs_audio_format::B_GS_U8;
 
 		error = Init(data, frames, &gsformat);
 
 		// free the buffers we no longer need
-		delete [] buffer;
-		delete [] data;
 	} else {
 		// We need to determine the size, in bytes, of a single sample.
 		// At the same time, we will store the format of the audio buffer
@@ -201,8 +207,6 @@ BSimpleGameSound::Init(const entry_ref* inFile)
 		}
 
 		error = Init(data, frames, &gsformat);
-
-		delete [] data;
 	}
 
 	file.ReleaseTrack(audioStream);