public override void Close()
{
base.Close();
_audioTrack = null;
_videoTrack = null;
_frameCount = 0;
if (_stream != null)
{
_stream.Dispose();
_stream = null;
}
}
public override void Close()
{
base.Close();
_audioTrack = null;
_videoTrack = null;
_frameCount = 0;
if (_stream != null)
{
_stream.Dispose();
_stream = null;
}
}
protected override void ReadNextPacket()
{
Stream sector = null;
BinaryReader br = null;
byte[] partialFrame = null;
int sectorsRead = 0;
while (_stream.Position < _stream.Length)
{
sector = ReadSector();
sectorsRead++;
if (sector == null)
throw new InvalidOperationException("Corrupt PSX stream sector");
br = new BinaryReader(sector);
sector.Seek(0x11, SeekOrigin.Begin);
byte track = (byte)sector.ReadByte();
if (track >= 32)
throw new InvalidOperationException("Bad PSX stream track");
byte sectorType = (byte)(br.ReadByte() & CDXA_TYPE_MASK);
switch (sectorType)
{
case CDXA_TYPE_DATA:
case CDXA_TYPE_VIDEO:
if (track == 1)
{
if (_videoTrack == null)
{
_videoTrack = new PsxVideoTrack(sector, _speed, _frameCount, _screenFormat);
AddTrack(_videoTrack);
}
sector.Seek(28, SeekOrigin.Begin);
ushort curSector = br.ReadUInt16();
ushort sectorCount = br.ReadUInt16();
br.ReadUInt32();
ushort frameSize = (ushort)br.ReadUInt32();
if (curSector >= sectorCount)
throw new InvalidOperationException("Bad sector");
if (partialFrame == null)
partialFrame = new byte[sectorCount * VIDEO_DATA_CHUNK_SIZE];
sector.Seek(VIDEO_DATA_HEADER_SIZE, SeekOrigin.Begin);
sector.Read(partialFrame, curSector * VIDEO_DATA_CHUNK_SIZE, VIDEO_DATA_CHUNK_SIZE);
if (curSector == sectorCount - 1)
{
// Done assembling the frame
using (var frame = new MemoryStream(partialFrame, 0, frameSize))
{
_videoTrack.DecodeFrame(frame, sectorsRead);
}
sector.Dispose();
return;
}
}
else
throw new InvalidOperationException("Unhandled multi-track video");
break;
case CDXA_TYPE_AUDIO:
// We only handle one audio channel so far
if (track == 1)
{
if (_audioTrack == null)
{
_audioTrack = new PsxAudioTrack(_mixer, sector);
AddTrack(_audioTrack);
}
_audioTrack.QueueAudioFromSector(sector);
}
else {
// TODO: warning("Unhandled multi-track audio");
}
break;
default:
// This shows up way too often, but the other sectors
// are safe to ignore
//TODO: warning("Unknown PSX sector type 0x%x", sectorType);
break;
}
sector.Dispose();
sector = null;
}
if (_stream.Position >= _stream.Length)
{
if (_videoTrack != null)
_videoTrack.SetEndOfTrack();
if (_audioTrack != null)
_audioTrack.SetEndOfTrack();
}
}
protected override void ReadNextPacket()
{
Stream sector = null;
BinaryReader br = null;
byte[] partialFrame = null;
int sectorsRead = 0;
while (_stream.Position < _stream.Length)
{
sector = ReadSector();
sectorsRead++;
if (sector == null)
{
throw new InvalidOperationException("Corrupt PSX stream sector");
}
br = new BinaryReader(sector);
sector.Seek(0x11, SeekOrigin.Begin);
byte track = (byte)sector.ReadByte();
if (track >= 32)
{
throw new InvalidOperationException("Bad PSX stream track");
}
byte sectorType = (byte)(br.ReadByte() & CDXA_TYPE_MASK);
switch (sectorType)
{
case CDXA_TYPE_DATA:
case CDXA_TYPE_VIDEO:
if (track == 1)
{
if (_videoTrack == null)
{
_videoTrack = new PsxVideoTrack(sector, _speed, _frameCount, _screenFormat);
AddTrack(_videoTrack);
}
sector.Seek(28, SeekOrigin.Begin);
ushort curSector = br.ReadUInt16();
ushort sectorCount = br.ReadUInt16();
br.ReadUInt32();
ushort frameSize = (ushort)br.ReadUInt32();
if (curSector >= sectorCount)
{
throw new InvalidOperationException("Bad sector");
}
if (partialFrame == null)
{
partialFrame = new byte[sectorCount * VIDEO_DATA_CHUNK_SIZE];
}
sector.Seek(VIDEO_DATA_HEADER_SIZE, SeekOrigin.Begin);
sector.Read(partialFrame, curSector * VIDEO_DATA_CHUNK_SIZE, VIDEO_DATA_CHUNK_SIZE);
if (curSector == sectorCount - 1)
{
// Done assembling the frame
using (var frame = new MemoryStream(partialFrame, 0, frameSize))
{
_videoTrack.DecodeFrame(frame, sectorsRead);
}
sector.Dispose();
return;
}
}
else
{
throw new InvalidOperationException("Unhandled multi-track video");
}
break;
case CDXA_TYPE_AUDIO:
// We only handle one audio channel so far
if (track == 1)
{
if (_audioTrack == null)
{
_audioTrack = new PsxAudioTrack(_mixer, sector);
AddTrack(_audioTrack);
}
_audioTrack.QueueAudioFromSector(sector);
}
else
{
// TODO: warning("Unhandled multi-track audio");
}
break;
default:
// This shows up way too often, but the other sectors
// are safe to ignore
//TODO: warning("Unknown PSX sector type 0x%x", sectorType);
break;
}
sector.Dispose();
sector = null;
}
if (_stream.Position >= _stream.Length)
{
if (_videoTrack != null)
{
_videoTrack.SetEndOfTrack();
}
if (_audioTrack != null)
{
_audioTrack.SetEndOfTrack();
}
}
}