/// <summary>
/// Appends an audio buffer to the tracks internal ring buffer
/// </summary>
/// <typeparam name="T">The audio sample type</typeparam>
/// <param name="bufferTag">The unqiue tag of the buffer being appended</param>
/// <param name="buffer">The buffer to append</param>
public void AppendBuffer <T>(long bufferTag, T[] buffer) where T : struct
{
if (AudioStream == null)
{
return;
}
int sampleSize = Unsafe.SizeOf <T>();
int targetSize = sampleSize * buffer.Length;
// Do we need to downmix?
if (_hardwareChannels != _virtualChannels)
{
if (sampleSize != sizeof(short))
{
throw new NotImplementedException("Downmixing formats other than PCM16 is not supported!");
}
short[] downmixedBuffer;
ReadOnlySpan <short> bufferPCM16 = MemoryMarshal.Cast <T, short>(buffer);
if (_virtualChannels == 6)
{
downmixedBuffer = Downmixing.DownMixSurroundToStereo(bufferPCM16);
if (_hardwareChannels == 1)
{
downmixedBuffer = Downmixing.DownMixStereoToMono(downmixedBuffer);
}
}
else if (_virtualChannels == 2)
{
downmixedBuffer = Downmixing.DownMixStereoToMono(bufferPCM16);
}
else
{
throw new NotImplementedException($"Downmixing from {_virtualChannels} to {_hardwareChannels} not implemented!");
}
targetSize = sampleSize * downmixedBuffer.Length;
// Copy the memory to our ring buffer
m_Buffer.Write(downmixedBuffer, 0, targetSize);
// Keep track of "buffered" buffers
m_ReservedBuffers.Enqueue(new SoundIoBuffer(bufferTag, targetSize));
}
else
{
// Copy the memory to our ring buffer
m_Buffer.Write(buffer, 0, targetSize);
// Keep track of "buffered" buffers
m_ReservedBuffers.Enqueue(new SoundIoBuffer(bufferTag, targetSize));
}
}
/// <summary>
/// Appends an audio buffer to the tracks internal ring buffer
/// </summary>
/// <typeparam name="T">The audio sample type</typeparam>
/// <param name="bufferTag">The unqiue tag of the buffer being appended</param>
/// <param name="buffer">The buffer to append</param>
public void AppendBuffer <T>(long bufferTag, T[] buffer)
{
if (AudioStream == null)
{
return;
}
// Calculate the size of the audio samples
int size = Unsafe.SizeOf <T>();
// Calculate the amount of bytes to copy from the buffer
int bytesToCopy = size * buffer.Length;
// Copy the memory to our ring buffer
m_Buffer.Write(buffer, 0, bytesToCopy);
// Keep track of "buffered" buffers
m_ReservedBuffers.Enqueue(new SoundIoBuffer(bufferTag, bytesToCopy));
}