private void PushChunkToStreams(StreamChunk chunk)
{
foreach (var stream in _splitStreams)
{
stream.PushChunk(chunk);
}
}
private void ReadAheadChunks()
{
_started = true;
do
{
#if DEBUG
DebugWaitBeforeReadingSourceStreamChunk();
#endif
var chunk = new StreamChunk(new byte[_options.ChunkSize]);
chunk.Length = _sourceStream.Read(chunk.Buffer, 0, chunk.Buffer.Length);
if (chunk.Length > 0)
{
PushChunkToStreams(chunk);
}
else
{
PushChunkToStreams(null);
#if DEBUG
DebugWaitAfterReadingSourceStreamChunk();
#endif
_finished = true;
}
} while (_finished == false);
}
public override int Read(byte[] buffer, int offset, int count)
{
if (_finished)
{
return(0);
}
if (_chunk == null || _position == _chunk.Length)
{
_chunk = PopChunk(CancellationToken.None);
if (_chunk == null || _chunk.Length == 0)
{
_finished = true;
return(0);
}
_position = 0;
}
// ReSharper disable once PossibleNullReferenceException
var bufferAvailable = _chunk.Length - _position;
if (bufferAvailable >= count)
{
Array.Copy(_chunk.Buffer, _position, buffer, offset, count);
_position += count;
return(count);
}
Array.Copy(_chunk.Buffer, _position, buffer, offset, bufferAvailable);
_position = 0;
_chunk = null;
return(bufferAvailable);
}
public async Task StartReadAhead()
{
_started = true;
do
{
#if DEBUG
DebugWaitBeforeReadingSourceStreamChunk();
#endif
var chunk = new StreamChunk(new byte[_chunkSize]);
chunk.Length = await _sourceStream.ReadAsync(chunk.Buffer, 0, chunk.Buffer.Length);
if (chunk.Length > 0)
{
PushChunkToStreams(chunk);
}
else
{
PushChunkToStreams(null);
_finished = true;
}
} while (_finished == false);
}
public void PushChunk(StreamChunk chunk)
{
_queueChunks.Enqueue(chunk);
_queueWaiter.Set();
}