BDInfo.TSStreamBuffer.ReadBytes C# (CSharp) Method

        public byte[] ReadBytes(int bytes)
        {
            if (Stream.Position + bytes >= BufferLength)
            {
                return null;
            }

            byte[] value = new byte[bytes];
            Stream.Read(value, 0, bytes);
            return value;
        }

        public static void Scan(
            TSAudioStream stream,
            TSStreamBuffer buffer,
            ref string tag)
        {
            if (stream.IsInitialized)
            {
                return;
            }

            byte[] header = buffer.ReadBytes(4);
            int    flags  = (header[2] << 8) + header[3];

            switch ((flags & 0xF000) >> 12)
            {
            case 1:     // 1/0/0
                stream.ChannelCount = 1;
                stream.LFE          = 0;
                break;

            case 3:     // 2/0/0
                stream.ChannelCount = 2;
                stream.LFE          = 0;
                break;

            case 4:     // 3/0/0
                stream.ChannelCount = 3;
                stream.LFE          = 0;
                break;

            case 5:     // 2/1/0
                stream.ChannelCount = 3;
                stream.LFE          = 0;
                break;

            case 6:     // 3/1/0
                stream.ChannelCount = 4;
                stream.LFE          = 0;
                break;

            case 7:     // 2/2/0
                stream.ChannelCount = 4;
                stream.LFE          = 0;
                break;

            case 8:     // 3/2/0
                stream.ChannelCount = 5;
                stream.LFE          = 0;
                break;

            case 9:     // 3/2/1
                stream.ChannelCount = 5;
                stream.LFE          = 1;
                break;

            case 10:     // 3/4/0
                stream.ChannelCount = 7;
                stream.LFE          = 0;
                break;

            case 11:     // 3/4/1
                stream.ChannelCount = 7;
                stream.LFE          = 1;
                break;

            default:
                stream.ChannelCount = 0;
                stream.LFE          = 0;
                break;
            }

            switch ((flags & 0xC0) >> 6)
            {
            case 1:
                stream.BitDepth = 16;
                break;

            case 2:
                stream.BitDepth = 20;
                break;

            case 3:
                stream.BitDepth = 24;
                break;

            default:
                stream.BitDepth = 0;
                break;
            }

            switch ((flags & 0xF00) >> 8)
            {
            case 1:
                stream.SampleRate = 48000;
                break;

            case 4:
                stream.SampleRate = 96000;
                break;

            case 5:
                stream.SampleRate = 192000;
                break;

            default:
                stream.SampleRate = 0;
                break;
            }

            stream.BitRate = (uint)
                             (stream.SampleRate * stream.BitDepth *
                              (stream.ChannelCount + stream.LFE));

            stream.IsVBR         = false;
            stream.IsInitialized = true;
        }