Esempio n. 1
0
        public override void Close()
        {
            base.Close();
            _audioTrack = null;
            _videoTrack = null;
            _frameCount = 0;

            if (_stream != null)
            {
                _stream.Dispose();
                _stream = null;
            }
        }
Esempio n. 2
0
        public override void Close()
        {
            base.Close();
            _audioTrack = null;
            _videoTrack = null;
            _frameCount = 0;

            if (_stream != null)
            {
                _stream.Dispose();
                _stream = null;
            }
        }
Esempio n. 3
0
        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();
            }
        }
Esempio n. 4
0
        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();
                }
            }
        }