opensl_wave_player.cpp

struct WaveFormatEx {
	uint16_t tag, channels;
	uint32_t samplesPerSecond, averageBytesPerSecond;
	uint16_t blockAlign, bitsPerSample;
};

struct WaveContext
{
	SLObjectItf playerObject;
	SLPlayItf playerPlay;
	SLAndroidSimpleBufferQueueItf playerBufferQueue;
	void *fileImg;
	int enqueuedSize;
	bool loop;
};

void Voice::Create(const char* fileName)
{
	context = new WaveContext;
	memset(context, 0, sizeof(*context));
	bool result = false;
	result = !!(context->fileImg = LoadFile(fileName));
	assert(result);
	const WaveFormatEx* wfx = (WaveFormatEx*)RiffFindChunk(context->fileImg, "fmt ");
	assert(wfx);
	SLDataLocator_AndroidSimpleBufferQueue q = {SL_DATALOCATOR_ANDROIDSIMPLEBUFFERQUEUE, 2};
	SLDataFormat_PCM f = {SL_DATAFORMAT_PCM, wfx->channels, wfx->samplesPerSecond * 1000, wfx->bitsPerSample, wfx->bitsPerSample, wfx->channels == 2 ? SL_SPEAKER_FRONT_LEFT | SL_SPEAKER_FRONT_RIGHT : SL_SPEAKER_FRONT_CENTER, SL_BYTEORDER_LITTLEENDIAN};
	SLDataSource src = {&q, &f};
	SLDataLocator_OutputMix m = {SL_DATALOCATOR_OUTPUTMIX, sl.GetOutputMixObject()};
	SLDataSink sink = {&m, nullptr};
	SLInterfaceID ids = SL_IID_ANDROIDSIMPLEBUFFERQUEUE;
	SLboolean req = SL_BOOLEAN_TRUE;
	SLCall(sl.GetEngine(), CreateAudioPlayer, &context->playerObject, &src, &sink, 1, &ids, &req);
	SLCall(context->playerObject, Realize, SL_BOOLEAN_FALSE);
	SLCall(context->playerObject, GetInterface, SL_IID_ANDROIDSIMPLEBUFFERQUEUE, &context->playerBufferQueue);
	SLCall(context->playerObject, GetInterface, SL_IID_PLAY, &context->playerPlay);
}