private void ReadAndUseAudioProcessor(int requestedBytes, double speedRatio)
{
if (AudioProcessorBuffer == null || AudioProcessorBuffer.Length < Convert.ToInt32(requestedBytes * Constants.MaxSpeedRatio))
{
AudioProcessorBuffer = new short[Convert.ToInt32(requestedBytes * Constants.MaxSpeedRatio / Constants.AudioBytesPerSample)];
}
var bytesToRead = Convert.ToInt32((requestedBytes * speedRatio).ToMultipleOf(SampleBlockSize));
var samplesToRequest = requestedBytes / SampleBlockSize;
// Set the new tempo (without changing the pitch) according to the speed ratio
AudioProcessor.SetTempo(Convert.ToSingle(speedRatio));
// Sending Samples to the processor
while (AudioProcessor.AvailableSampleCount < samplesToRequest && AudioBuffer != null)
{
var realBytesToRead = Math.Min(AudioBuffer.ReadableCount, bytesToRead);
if (realBytesToRead == 0)
{
break;
}
realBytesToRead = Convert.ToInt32((realBytesToRead * 1.0).ToMultipleOf(SampleBlockSize));
AudioBuffer.Read(realBytesToRead, ReadBuffer, 0);
Buffer.BlockCopy(ReadBuffer, 0, AudioProcessorBuffer, 0, realBytesToRead);
AudioProcessor.PutSamplesI16(AudioProcessorBuffer, Convert.ToUInt32(realBytesToRead / SampleBlockSize));
}
// Receiving samples from the processor
var numSamples = AudioProcessor.ReceiveSamplesI16(AudioProcessorBuffer, Convert.ToUInt32(samplesToRequest));
Array.Clear(ReadBuffer, 0, ReadBuffer.Length);
Buffer.BlockCopy(AudioProcessorBuffer, 0, ReadBuffer, 0, Convert.ToInt32(numSamples * SampleBlockSize));
}