private void _updateAudioContext()
{
_dataWasSent = false;
_stretcher?.Dispose();
var speedRatio = (_renderer.RefreshRate / _config.TargetFps);
Console.Write(speedRatio);
_stretcher = new RubberBandStretcher(
_config.SampleRate,
2,
RubberBandStretcher.Options.ProcessRealTime,
1 / speedRatio,
speedRatio
);
_latencyCounter = _stretcher.GetLatency();
if (_resamplerState != IntPtr.Zero)
{
SampleRate.src_delete(_resamplerState);
}
if (_config.SampleRate != (int)_currentSystemAvInfo.Timing.SampleRate)
{
_resampleNeeded = true;
_audioResampleRatio = (_config.SampleRate / _currentSystemAvInfo.Timing.SampleRate);
_resamplerState = SampleRate.src_new(SampleRate.Quality.SRC_SINC_BEST_QUALITY, 2, out var error);
if (error > 0)
{
Logger.Error("Error initializing resampler: '{0}'", SampleRate.src_strerror(error));
}
Logger.Debug("Audio Resample Ratio: {0}", _audioResampleRatio);
}
else
{
_resampleNeeded = false;
Logger.Debug("Resampling not needed");
}
}
private void _resampleAudioData()
{
unsafe
{
var sampleCount = _temporaryBuffer.CurrentLength;
var frames = sampleCount / 2;
fixed(float *conversionPtr = &_temporaryConversionBuffer[0])
{
_temporaryBuffer.CopyTo(_temporaryPreconversionAudioBuffer, sampleCount);
fixed(short *shortDataPtr = &_temporaryPreconversionAudioBuffer[0])
{
SampleRate.src_short_to_float_array(shortDataPtr, conversionPtr,
sampleCount);
}
if (_resampleNeeded)
{
fixed(float *resamplePtr =
&_temporaryResampleBuffer[0])
{
var convert = new SampleRate.SRC_DATA()
{
data_in = conversionPtr,
data_out = resamplePtr,
input_frames = frames,
output_frames = frames * 2,
src_ratio = _audioResampleRatio
};
var res = SampleRate.src_process(_resamplerState, ref convert);
if (res != 0)
{
Logger.Error(SampleRate.src_strerror(res));
}
else
{
for (var i = 0; i < convert.output_frames_gen; i++)
{
_temporaryStretcherBuffer[0][i] = _temporaryResampleBuffer[i * 2];
_temporaryStretcherBuffer[1][i] = _temporaryResampleBuffer[i * 2 + 1];
}
_stretcher.Process(
_temporaryStretcherBuffer,
convert.output_frames_gen,
false
);
if (_stretcher.GetSamplesRequired() > 0)
{
return;
}
var availableFrames = _stretcher.Available();
_stretcher.Retrieve(_temporaryStretcherBuffer, availableFrames);
for (var i = 0; i < availableFrames; i++)
{
_temporaryResampleBuffer[i * 2] = _temporaryStretcherBuffer[0][i];
_temporaryResampleBuffer[i * 2 + 1] = _temporaryStretcherBuffer[1][i];
}
_audioBuffer.CopyFrom(_temporaryResampleBuffer, availableFrames * 2);
}
}
}
else
{
Console.WriteLine("else");
// _audioBuffer.CopyFrom(_temporaryConversionBuffer, frames * 2);
}
}
}
}