/// <summary>
/// Decodes a dca file to PCM data
/// </summary>
/// <returns>byte array with PCM data</returns>
public ReadData Decode(int offset)
{
int channels = 2;
int ms = 20;
int blockSize = 48 * 2 * channels * ms;
using (FileStream fs = new FileStream(__filename, FileMode.Open))
using (BinaryReader br = new BinaryReader(fs))
{
ushort bytesToRead = 0;
br.BaseStream.Position = offset;
while ((bytesToRead = br.ReadUInt16()) > 0)
{
byte[] buffer = new byte[bytesToRead];
buffer = br.ReadBytes(bytesToRead);
byte[] pcmBuffer = new byte[blockSize];
int bytesDecoded = decoder.DecodeFrame(buffer, 0, bytesToRead, pcmBuffer);
ReadData r = new ReadData();
r.offset = bytesToRead + offset;
r.data = pcmBuffer;
return(r);
}
}
return(new ReadData());
}
public override async Task WriteAsync(byte[] buffer, int offset, int count, CancellationToken cancelToken)
{
if (!_hasHeader)
{
throw new InvalidOperationException("Received payload without an RTP header");
}
_hasHeader = false;
if (!_nextMissed)
{
count = _decoder.DecodeFrame(buffer, offset, count, _buffer, 0, false);
await _next.WriteAsync(_buffer, 0, count, cancelToken).ConfigureAwait(false);
}
else if (count > 0)
{
count = _decoder.DecodeFrame(buffer, offset, count, _buffer, 0, true);
await _next.WriteAsync(_buffer, 0, count, cancelToken).ConfigureAwait(false);
}
else
{
count = _decoder.DecodeFrame(null, 0, 0, _buffer, 0, true);
await _next.WriteAsync(_buffer, 0, count, cancelToken).ConfigureAwait(false);
}
}
public override int Read(byte[] buffer, int offset, int count)
{
count = _decoder.DecodeFrame(buffer, offset, count, _buffer, 0);
return(base.Read(_buffer, 0, count));
}
