C++ (Cpp) AudioSource::getNumChannels示例

// Decode
bool Sound::decode(const RString& path, SoundInfo& info, float** data)
{
	bool decoded = false;
	AudioSource* source = 0;
	if (path.find(OGG_FILE_EXT) != RString::npos)
	{
#if MOAI_WITH_VORBIS
		OggAudioSource* as = new OggAudioSource();
		source = as;
		if(as->init(path, true))
			decoded = true;
#endif
	}
	else
	{
#if defined(__APPLE__)
		ExtAudioFileAudioSource *as = new ExtAudioFileAudioSource();
		source = as;
		if(as->init(path, true))
			decoded = true;
#elif defined(__ANDROID__) | defined(__linux__) | defined(__OPENAL__) | defined ( __QNX__ )
      WaveFileAudioSource *as = new WaveFileAudioSource();
		source = as;
		if(as->init(path, true))
			decoded = true;
#else
		DShowAudioSource* as = new DShowAudioSource();
		source = as;
		if(as->init(path, true))
			decoded = true;
#endif
	}
	
	// Couldn't decode the file
	if(!decoded)
	{
		if(source)
			delete source;
		return false;
	}

	RAudioBuffer* buffer = source->getBuffer();

	UInt32 size = buffer->getDataSize();

	// Allocate space and copy the buffer
	*data = (float*)new char[size];
	buffer->copyInto(*data);

	info.mChannels = source->getNumChannels();
	info.mBitsPerSample = 32;
	info.mSampleRate = source->getSampleRate();
	info.mTotalFrames = size / 4 / source->getNumChannels();
	info.mLength = (double)size / 4.0 / source->getNumChannels() / source->getSampleRate();

	if(source)
		delete source;
	return true;
}