Clone() public method

public Clone ( ) : TSStream
return TSStream
Beispiel #1
0
        public override TSStream Clone()
        {
            TSAudioStream stream = new TSAudioStream();

            CopyTo(stream);

            stream.SampleRate    = SampleRate;
            stream.ChannelLayout = ChannelLayout;
            stream.ChannelCount  = ChannelCount;
            stream.BitDepth      = BitDepth;
            stream.LFE           = LFE;
            stream.DialNorm      = DialNorm;
            stream.AudioMode     = AudioMode;
            if (CoreStream != null)
            {
                stream.CoreStream = (TSAudioStream)CoreStream.Clone();
            }

            return(stream);
        }
Beispiel #2
0
        public void Scan(TSAudioStream stream, TSStreamBuffer buffer, ref string tag, long?bitrate)
        {
            if (stream.IsInitialized)
            {
                return;
            }

            var sync = buffer.ReadBytes(2);

            if (sync == null || sync[0] != 0x0B || sync[1] != 0x77)
            {
                return;
            }

            var secondFrame = stream.ChannelCount > 0;

            uint srCode;
            uint frameSize     = 0;
            uint frameSizeCode = 0;
            uint channelMode;
            uint lfeOn;
            uint dialNorm    = 0;
            uint dialNormExt = 0;
            uint numBlocks   = 0;

            var hdr  = buffer.ReadBytes(4);
            var bsid = (uint)((hdr[3] & 0xF8) >> 3);

            buffer.Seek(-4, SeekOrigin.Current);
            if (bsid <= 10)
            {
                buffer.BSSkipBytes(2);
                srCode        = buffer.ReadBits2(2);
                frameSizeCode = buffer.ReadBits2(6);
                bsid          = buffer.ReadBits2(5);
                buffer.BSSkipBits(3);

                channelMode = buffer.ReadBits2(3);
                if ((channelMode & 0x1) > 0 && channelMode != 0x1)
                {
                    buffer.BSSkipBits(2);
                }
                if ((channelMode & 0x4) > 0)
                {
                    buffer.BSSkipBits(2);
                }
                if (channelMode == 0x2)
                {
                    var dsurmod = buffer.ReadBits2(2);
                    if (dsurmod == 0x2)
                    {
                        stream.AudioMode = TSAudioMode.Surround;
                    }
                }

                lfeOn    = buffer.ReadBits2(1);
                dialNorm = buffer.ReadBits2(5);
                if (buffer.ReadBool())
                {
                    buffer.BSSkipBits(8);
                }
                if (buffer.ReadBool())
                {
                    buffer.BSSkipBits(8);
                }
                if (buffer.ReadBool())
                {
                    buffer.BSSkipBits(7);
                }
                if (channelMode == 0)
                {
                    buffer.BSSkipBits(5);
                    if (buffer.ReadBool())
                    {
                        buffer.BSSkipBits(8);
                    }
                    if (buffer.ReadBool())
                    {
                        buffer.BSSkipBits(8);
                    }
                    if (buffer.ReadBool())
                    {
                        buffer.BSSkipBits(7);
                    }
                }

                buffer.BSSkipBits(2);
                if (bsid == 6)
                {
                    if (buffer.ReadBool())
                    {
                        buffer.BSSkipBits(14);
                    }
                    if (buffer.ReadBool())
                    {
                        uint dsurexmod    = buffer.ReadBits2(2);
                        uint dheadphonmod = buffer.ReadBits2(2);
                        if (dheadphonmod == 0x2)
                        {
                            // TODO
                        }

                        buffer.BSSkipBits(10);
                        if (dsurexmod == 2)
                        {
                            stream.AudioMode = TSAudioMode.Extended;
                        }
                    }
                }
            }
            else
            {
                uint frameType = buffer.ReadBits2(2);
                buffer.BSSkipBits(3);

                frameSize = (buffer.ReadBits4(11) + 1) << 1;

                srCode = buffer.ReadBits2(2);
                if (srCode == 3)
                {
                    srCode    = buffer.ReadBits2(2);
                    numBlocks = 3;
                }
                else
                {
                    numBlocks = buffer.ReadBits2(2);
                }

                channelMode = buffer.ReadBits2(3);
                lfeOn       = buffer.ReadBits2(1);
                bsid        = buffer.ReadBits2(5);
                dialNormExt = buffer.ReadBits2(5);

                if (buffer.ReadBool())
                {
                    buffer.BSSkipBits(8);
                }
                if (channelMode == 0) // 1+1
                {
                    buffer.BSSkipBits(5);
                    if (buffer.ReadBool())
                    {
                        buffer.BSSkipBits(8);
                    }
                }

                if (frameType == 1) //dependent stream
                {
                    stream.CoreStream            = (TSAudioStream)stream.Clone();
                    stream.CoreStream.StreamType = TSStreamType.AC3_AUDIO;

                    if (buffer.ReadBool()) //channel remapping
                    {
                        var chanmap = buffer.ReadBits4(16);

                        stream.ChannelCount  = stream.CoreStream.ChannelCount;
                        stream.ChannelCount += AC3ChanMap((int)chanmap);
                        lfeOn = (uint)stream.CoreStream.LFE;
                    }
                }

                var emdfFound = false;

                do
                {
                    var emdfSync = buffer.ReadBits4(16);
                    if (emdfSync == 0x5838)
                    {
                        emdfFound = true;
                        break;
                    }

                    buffer.Seek(-2, SeekOrigin.Current);
                    buffer.BSSkipBits(1); // skip 1 bit
                } while (buffer.Position < buffer.Length);

                if (emdfFound)
                {
                    var emdfContainerSize = buffer.ReadBits4(16);
                    var remainAfterEmdf   = buffer.DataBitStreamRemain() - emdfContainerSize * 8;

                    uint emdfVersion = buffer.ReadBits2(2); //emdf_version
                    if (emdfVersion == 3)
                    {
                        emdfVersion += buffer.ReadBits2(2);
                    }

                    if (emdfVersion > 0)
                    {
                        buffer.BSSkipBits((int)(buffer.DataBitStreamRemain() - remainAfterEmdf));
                    }
                    else
                    {
                        var temp = buffer.ReadBits2(3);
                        if (temp == 0x7)
                        {
                            buffer.BSSkipBits(2);              //skip 3 bits
                        }
                        var emdfPayloadID = buffer.ReadBits2(5);

                        if (emdfPayloadID > 0 && emdfPayloadID < 16)
                        {
                            if (emdfPayloadID == 0x1F)
                            {
                                buffer.BSSkipBits(5);                        //skip 5 bits
                            }
                            EmdfPayloadConfig(buffer);

                            var emdfPayloadSize = buffer.ReadBits2(8) * 8;
                            buffer.BSSkipBits(emdfPayloadSize + 1);
                        }

                        while ((emdfPayloadID = buffer.ReadBits2(5)) != 14 && buffer.Position < buffer.Length)
                        {
                            if (emdfPayloadID == 0x1F)
                            {
                                buffer.BSSkipBits(5);                        //skip 5 bits
                            }
                            EmdfPayloadConfig(buffer);

                            var emdfPayloadSize = buffer.ReadBits2(8) * 8;
                            buffer.ReadBits4(emdfPayloadSize + 1);
                        }

                        if (buffer.Position < buffer.Length && emdfPayloadID == 14)
                        {
                            EmdfPayloadConfig(buffer);

                            buffer.BSSkipBits(12);

                            uint jocNumObjectsBits = buffer.ReadBits2(6);

                            if (jocNumObjectsBits > 0)
                            {
                                stream.HasExtensions = true;
                            }
                        }
                    }
                }
            }

            if (channelMode < 8 && stream.ChannelCount == 0)
            {
                stream.ChannelCount = AC3Channels[channelMode];
            }

            if (stream.AudioMode == TSAudioMode.Unknown)
            {
                switch (channelMode)
                {
                case 0:     // 1+1
                    stream.AudioMode = TSAudioMode.DualMono;
                    break;

                case 2:     // 2/0
                    stream.AudioMode = TSAudioMode.Stereo;
                    break;

                default:
                    stream.AudioMode = TSAudioMode.Unknown;
                    break;
                }
            }

            switch (srCode)
            {
            case 0:
                stream.SampleRate = 48000;
                break;

            case 1:
                stream.SampleRate = 44100;
                break;

            case 2:
                stream.SampleRate = 32000;
                break;

            default:
                stream.SampleRate = 0;
                break;
            }

            if (bsid <= 10)
            {
                var fSize = frameSizeCode >> 1;
                if (fSize < 19)
                {
                    stream.BitRate = AC3Bitrate[fSize] * 1000;
                }
            }
            else
            {
                stream.BitRate = (long)(4.0 * frameSize * stream.SampleRate / (numBlocks * 256));
                if (stream.CoreStream != null)
                {
                    stream.BitRate += stream.CoreStream.BitRate;
                }
            }

            stream.LFE = (int)lfeOn;
            if (stream.StreamType != TSStreamType.AC3_PLUS_SECONDARY_AUDIO)
            {
                if (stream.StreamType == TSStreamType.AC3_PLUS_AUDIO && bsid == 6 || stream.StreamType == TSStreamType.AC3_AUDIO)
                {
                    stream.DialNorm = (int)dialNorm * -1;
                }
                else if (stream.StreamType == TSStreamType.AC3_PLUS_AUDIO && secondFrame)
                {
                    stream.DialNorm = (int)dialNormExt * -1;
                }
            }

            stream.IsVBR = false;
            if (stream.StreamType == TSStreamType.AC3_PLUS_AUDIO && bsid == 6 && !secondFrame)
            {
                stream.IsInitialized = false;
            }
            else
            {
                stream.IsInitialized = true;
            }
        }