private static byte[] ResamplePcm(ref byte[] toResample, ref int sourceLength, WaveFormat sourceFormat, WaveFormat destPcmFormat, out int resultLength)
{
Debug.Assert(destPcmFormat.Encoding == WaveFormatEncoding.Pcm, "Codec format must be PCM");
if (resampleRateStream != null && (!lastResampleSourceFormat.Equals(sourceFormat) || !lastResampleDestFormat.Equals(destPcmFormat)))
{
resampleRateStream.Dispose();
resampleRateStream = null;
}
if (resampleRateStream == null)
{
WaveFormat sourceRateFormat = new WaveFormat(sourceFormat.SampleRate, sourceFormat.BitsPerSample, destPcmFormat.Channels);
resampleRateStream = new AcmStream(sourceRateFormat, destPcmFormat);
if (sourceFormat.Channels != destPcmFormat.Channels)
{
WaveFormat destChanFormat = new WaveFormat(sourceFormat.SampleRate, sourceFormat.BitsPerSample, destPcmFormat.Channels);
if (resampleChannelStream != null)
{
resampleChannelStream.Dispose();
}
resampleChannelStream = new AcmStream(sourceFormat, destChanFormat);
}
lastResampleSourceFormat = sourceFormat;
lastResampleDestFormat = destPcmFormat;
}
int bytesConverted;
if (sourceFormat.Channels != destPcmFormat.Channels)
{
if (destPcmFormat.Channels == 1 && sourceFormat.Channels == 2)
{
toResample = MixStereoToMono(toResample, sourceLength);
sourceLength = toResample.Length;
}
else
{
Buffer.BlockCopy(toResample, 0, resampleChannelStream.SourceBuffer, 0, sourceLength);
sourceLength = resampleChannelStream.Convert(sourceLength, out bytesConverted);
if (bytesConverted >> 1 != sourceLength)
{
Console.WriteLine("WARNING: All input bytes were not converted.");
}
toResample = resampleChannelStream.DestBuffer;
}
}
Buffer.BlockCopy(toResample, 0, resampleRateStream.SourceBuffer, 0, sourceLength);
resultLength = resampleRateStream.Convert(sourceLength, out bytesConverted);
if (bytesConverted != sourceLength)
{
Console.WriteLine("WARNING: All input bytes were not converted.");
return(null);
}
return(resampleRateStream.DestBuffer);
}
/// <summary>
/// Disposes this stream
/// </summary>
/// <param name="disposing">true if the user called this</param>
protected override void Dispose(bool disposing)
{
if (disposing)
{
// Release managed resources.
if (conversionStream != null)
{
conversionStream.Dispose();
conversionStream = null;
}
if (sourceStream != null)
{
sourceStream.Dispose();
sourceStream = null;
}
}
else
{
System.Diagnostics.Debug.Assert(false, "WaveFormatConversionStream was not disposed");
}
// Release unmanaged resources.
// Set large fields to null.
// Call Dispose on your base class.
base.Dispose(disposing);
}
public void Dispose()
{
if (conversionStream != null)
{
conversionStream.Dispose();
conversionStream = null;
}
}
/// <summary>
/// Disposes this stream
/// </summary>
/// <param name="disposing">true if the user called this</param>
protected virtual void Dispose(bool disposing)
{
if (!isDisposed)
{
isDisposed = true;
conversionStream.Dispose();
}
}
/// <summary>
/// Disposes of this MP3 frame decompressor
/// </summary>
public void Dispose()
{
if (!disposed)
{
disposed = true;
conversionStream.Dispose();
GC.SuppressFinalize(this);
}
}
public void Dispose()
{
if (encodeStream != null)
{
encodeStream.Dispose();
encodeStream = null;
}
if (decodeStream != null)
{
decodeStream.Dispose();
decodeStream = null;
}
}
public void Dispose()
{
if (_encodeStream != null)
{
_encodeStream.Dispose();
_encodeStream = null;
}
if (_decodeStream != null)
{
_decodeStream.Dispose();
_decodeStream = null;
}
}
public void Dispose()
{
if (_encoder != null)
{
_encoder.Dispose();
_encoder = null;
}
if (_decoder != null)
{
_decoder.Dispose();
_decoder = null;
}
}
protected virtual void Dispose(bool disposing)
{
if (!this.isDisposed)
{
this.isDisposed = true;
AcmStream expr_15 = this.conversionStream;
if (expr_15 == null)
{
return;
}
expr_15.Dispose();
}
}
public void Dispose()
{
if (EncodeStream != null)
{
EncodeStream.Dispose();
EncodeStream = null;
}
if (DecodeStream == null)
{
return;
}
DecodeStream.Dispose();
DecodeStream = null;
}