C++ (Cpp) MixCallBack Examples

Example #1

File: driver_directsound.c Project: DanielGibson/jfaudiolib

static void FillBufferPortion(char * ptr, int remaining)
{
    int len;
	char *sptr;

	while (remaining > 0) {
		if (MixBufferUsed == MixBufferSize) {
			MixCallBack();
			
			MixBufferUsed = 0;
			MixBufferCurrent++;
			if (MixBufferCurrent >= MixBufferCount) {
				MixBufferCurrent -= MixBufferCount;
			}
		}
		
		while (remaining > 0 && MixBufferUsed < MixBufferSize) {
			sptr = MixBuffer + (MixBufferCurrent * MixBufferSize) + MixBufferUsed;
			
			len = MixBufferSize - MixBufferUsed;
			if (remaining < len) {
				len = remaining;
			}
			
			memcpy(ptr, sptr, len);
			
			ptr += len;
			MixBufferUsed += len;
			remaining -= len;
		}
	}
}

Example #2

File: driver_sdl.c Project: SilkyPantsDan/eduke32

int32_t SDLDrv_PCM_BeginPlayback(char *BufferStart, int32_t BufferSize,
						int32_t NumDivisions, void ( *CallBackFunc )( void ) )
{
	if (!Initialised) {
		ErrorCode = SDLErr_Uninitialised;
		return SDLErr_Error;
	}
	
	if (Playing) {
		SDLDrv_PCM_StopPlayback();
	}
    
	MixBuffer = BufferStart;
	MixBufferSize = BufferSize;
	MixBufferCount = NumDivisions;
	MixBufferCurrent = 0;
	MixBufferUsed = 0;
	MixCallBack = CallBackFunc;
	
	// prime the buffer
	MixCallBack();
    
	Mix_Resume(-1);
    
    Playing = 1;
    
	return SDLErr_Ok;
}

Example #3

File: driver_coreaudio.c Project: TermiT/sw-redux

int CoreAudioDrv_PCM_BeginPlayback(char *BufferStart, int BufferSize,
                                   int NumDivisions, void ( *CallBackFunc )( void ) )
{
	if (!Initialised) {
		ErrorCode = CAErr_Uninitialised;
		return CAErr_Error;
	}
	
	if (Playing) {
		CoreAudioDrv_PCM_StopPlayback();
	}
	
	MixBuffer = BufferStart;
	MixBufferSize = BufferSize;
	MixBufferCount = NumDivisions;
	MixBufferCurrent = 0;
	MixBufferUsed = 0;
	MixCallBack = CallBackFunc;
	
	// prime the buffer
	MixCallBack();
	
	AudioOutputUnitStart(output_audio_unit);
	
	Playing = 1;
	
	return CAErr_Ok;
}

Example #4

File: driver_coreaudio.c Project: TermiT/sw-redux

static OSStatus fillInput(	void *							inRefCon,
                    AudioUnitRenderActionFlags *	ioActionFlags,
                    const AudioTimeStamp *			inTimeStamp,
                    UInt32							inBusNumber,
                    UInt32							inNumberFrames,
                    AudioBufferList *				ioDataList)

{
	UInt32 remaining, len;
	char *ptr, *sptr;
    AudioBuffer *ioData;
	
    ioData = &ioDataList->mBuffers[0];
	remaining = ioData->mDataByteSize;
	ptr = ioData->mData;
	
	while (remaining > 0) {
		if (MixBufferUsed == MixBufferSize) {
			CoreAudioDrv_PCM_Lock();
			MixCallBack();
			CoreAudioDrv_PCM_Unlock();
			
			MixBufferUsed = 0;
			MixBufferCurrent++;
			if (MixBufferCurrent >= MixBufferCount) {
				MixBufferCurrent -= MixBufferCount;
			}
		}
		
		while (remaining > 0 && MixBufferUsed < MixBufferSize) {
			sptr = MixBuffer + (MixBufferCurrent * MixBufferSize) + MixBufferUsed;
			
			len = MixBufferSize - MixBufferUsed;
			if (remaining < len) {
				len = remaining;
			}
			
            memcpy(ptr, sptr, len);
			
			ptr += len;
			MixBufferUsed += len;
			remaining -= len;
		}
	}
    
	return noErr;
}

Example #5

File: driver_sdl.c Project: SilkyPantsDan/eduke32

static void fillData(int32_t chan, void *ptr, int32_t remaining, void *udata)
{
	int32_t len;
	char *sptr;

    UNREFERENCED_PARAMETER(chan);
    UNREFERENCED_PARAMETER(udata);
    
    if (!MixBuffer || !MixCallBack)
      return;

    SDL_LockMutex(EffectFence);

	while (remaining > 0) {
		if (MixBufferUsed == MixBufferSize) {
			MixCallBack();
			
			MixBufferUsed = 0;
			MixBufferCurrent++;
			if (MixBufferCurrent >= MixBufferCount) {
				MixBufferCurrent -= MixBufferCount;
			}
		}
		
		while (remaining > 0 && MixBufferUsed < MixBufferSize) {
			sptr = MixBuffer + (MixBufferCurrent * MixBufferSize) + MixBufferUsed;
			
			len = MixBufferSize - MixBufferUsed;
			if (remaining < len) {
				len = remaining;
			}
			
			memcpy(ptr, sptr, len);
			
			ptr = (void *)((uintptr_t)(ptr) + len);
			MixBufferUsed += len;
			remaining -= len;
		}
	}

    SDL_UnlockMutex(EffectFence);
}