public void Dispose()
{
if (_disposed)
{
return;
}
_disposed = true;
FFmpegAudioPInvoke.RemoveAudioDecoder(_decoderHandle);
if (_resamplerHandle != IntPtr.Zero)
{
FFmpegAudioPInvoke.RemoveAudioResampler(_resamplerHandle);
}
GC.SuppressFinalize(this);
}
/// <exception cref="DecoderException"></exception>
public unsafe bool TryDecode(RawAudioFrame rawAudioFrame)
{
if (rawAudioFrame is RawAACFrame aacFrame)
{
Debug.Assert(aacFrame.ConfigSegment.Array != null, "aacFrame.ConfigSegment.Array != null");
if (!_extraData.SequenceEqual(aacFrame.ConfigSegment))
{
if (_extraData.Length == aacFrame.ConfigSegment.Count)
{
Buffer.BlockCopy(aacFrame.ConfigSegment.Array, aacFrame.ConfigSegment.Offset, _extraData, 0,
aacFrame.ConfigSegment.Count);
}
else
_extraData = aacFrame.ConfigSegment.ToArray();
fixed(byte *extradataPtr = &_extraData[0])
{
int resultCode = FFmpegAudioPInvoke.SetAudioDecoderExtraData(_decoderHandle, (IntPtr)extradataPtr, aacFrame.ConfigSegment.Count);
if (resultCode != 0)
{
throw new DecoderException($"An error occurred while setting audio extra data, {_audioCodecId} codec, code: {resultCode}");
}
}
}
}
Debug.Assert(rawAudioFrame.FrameSegment.Array != null, "rawAudioFrame.FrameSegment.Array != null");
fixed(byte *rawBufferPtr = &rawAudioFrame.FrameSegment.Array[rawAudioFrame.FrameSegment.Offset])
{
int resultCode = FFmpegAudioPInvoke.DecodeFrame(_decoderHandle, (IntPtr)rawBufferPtr,
rawAudioFrame.FrameSegment.Count, out int sampleRate, out int bitsPerSample, out int channels);
_currentRawFrameTimestamp = rawAudioFrame.Timestamp;
if (resultCode != 0)
{
return(false);
}
if (rawAudioFrame is RawG711Frame g711Frame)
{
sampleRate = g711Frame.SampleRate;
channels = g711Frame.Channels;
}
if (_currentFrameFormat.SampleRate != sampleRate || _currentFrameFormat.BitPerSample != bitsPerSample ||
_currentFrameFormat.Channels != channels)
{
_currentFrameFormat = new AudioFrameFormat(sampleRate, bitsPerSample, channels);
if (_resamplerHandle != IntPtr.Zero)
{
FFmpegAudioPInvoke.RemoveAudioResampler(_resamplerHandle);
}
}
}
return(true);
}