/// <summary>
/// Event handler for audio sample being supplied by local capture device.
/// </summary>
private void LocalAudioSampleAvailable(object sender, WaveInEventArgs args)
{
//WaveBuffer wavBuffer = new WaveBuffer(args.Buffer.Take(args.BytesRecorded).ToArray());
//byte[] encodedSample = _audioEncoder.EncodeAudio(wavBuffer.ShortBuffer, _selectedSourceFormat, AudioSourceSamplingRate);
byte[] encodedSample = _audioEncoder.EncodeAudio(args.Buffer.Take(args.BytesRecorded).ToArray(), _selectedSourceFormat, AudioSourceSamplingRate);
OnAudioSourceEncodedSample?.Invoke((uint)encodedSample.Length, encodedSample);
}
private unsafe void AudioDecoder_OnAudioFrame(ref AVFrame avFrame)
{
if (OnAudioSourceEncodedSample == null)
{
return;
}
// Avoid to create several times buffer of the same size
if (_currentNbSamples != avFrame.nb_samples)
{
bufferSize = ffmpeg.av_samples_get_buffer_size(null, avFrame.channels, avFrame.nb_samples, AVSampleFormat.AV_SAMPLE_FMT_S16, 1);
buffer = new byte[bufferSize];
_currentNbSamples = avFrame.nb_samples;
}
// Convert audio
int dstSampleCount;
fixed(byte *pBuffer = buffer)
dstSampleCount = ffmpeg.swr_convert(_audioDecoder._swrContext, &pBuffer, bufferSize, avFrame.extended_data, avFrame.nb_samples).ThrowExceptionIfError();
Console.WriteLine($"nb_samples:{avFrame.nb_samples} - bufferSize:{bufferSize} - dstSampleCount:{dstSampleCount}");
if (dstSampleCount > 0)
{
// FFmpeg AV_SAMPLE_FMT_S16 will store the bytes in the correct endianess for the underlying platform.
short[] pcm = buffer.Take(dstSampleCount * 2).Where((x, i) => i % 2 == 0).Select((y, i) => BitConverter.ToInt16(buffer, i * 2)).ToArray();
var encodedSample = _audioEncoder.EncodeAudio(pcm, _audioFormatManager.SelectedFormat);
OnAudioSourceEncodedSample?.Invoke((uint)encodedSample.Length, encodedSample);
}
}
private void FileSourceDecoder_OnAudioFrame(byte[] buffer)
{
if (OnAudioSourceEncodedSample != null && buffer.Length > 0)
{
// FFmpeg AV_SAMPLE_FMT_S16 will store the bytes in the correct endianess for the underlying platform.
short[] pcm = buffer.Where((x, i) => i % 2 == 0).Select((y, i) => BitConverter.ToInt16(buffer, i * 2)).ToArray();
var encodedSample = _audioEncoder.EncodeAudio(pcm, _audioFormatManager.SelectedFormat);
OnAudioSourceEncodedSample((uint)encodedSample.Length, encodedSample);
}
}
/// <summary>
/// Event handler for audio sample being supplied by local capture device.
/// </summary>
private void LocalAudioSampleAvailable(object sender, WaveInEventArgs args)
{
// Note NAudio.Wave.WaveBuffer.ShortBuffer does not take into account little endian.
// https://github.com/naudio/NAudio/blob/master/NAudio/Wave/WaveOutputs/WaveBuffer.cs
// WaveBuffer wavBuffer = new WaveBuffer(args.Buffer.Take(args.BytesRecorded).ToArray());
// byte[] encodedSample = _audioEncoder.EncodeAudio(wavBuffer.ShortBuffer, _audioFormatManager.SelectedFormat);
byte[] buffer = args.Buffer.Take(args.BytesRecorded).ToArray();
short[] pcm = buffer.Where((x, i) => i % 2 == 0).Select((y, i) => BitConverter.ToInt16(buffer, i * 2)).ToArray();
byte[] encodedSample = _audioEncoder.EncodeAudio(pcm, _audioFormatManager.SelectedFormat);
OnAudioSourceEncodedSample?.Invoke((uint)encodedSample.Length, encodedSample);
}
void WriteDataCallback(byte[] buffer, int offset, int count)
{
var copy = new byte[count];
Buffer.BlockCopy(buffer, offset, copy, 0, count);
byte[] encodedSample = _audioEncoder.EncodeAudio(
copy.Where((x, i) => i % 2 == 0).Select((y, i) => (short)(copy[i * 2] << 8 | copy[i * 2 + 1])).ToArray(),
_audioFormatManager.SelectedFormat);
OnAudioSourceEncodedSample?.Invoke((uint)encodedSample.Length, encodedSample);
}
void WriteDataCallback(byte[] buffer, int offset, int count)
{
byte[] encodedSample = _audioEncoder.EncodeAudio(buffer.Skip(offset).Take(count).ToArray(), _selectedSourceFormat, AudioSourceSamplingRate);
OnAudioSourceEncodedSample?.Invoke((uint)encodedSample.Length, encodedSample);
}
