public EncodingInfo Read( Stream raf )
        {
            EncodingInfo info = new EncodingInfo();

            //Begin info fetch-------------------------------------------
            if ( raf.Length == 0 ) {
                //Empty File
                throw new CannotReadException("File is empty");
            }
            raf.Seek( 0 , SeekOrigin.Begin);

            //MP+ Header string
            byte[] b = new byte[4];
            raf.Read(b, 0, b.Length);
            string mpc = new string(System.Text.Encoding.ASCII.GetChars(b));
            if (mpc != "MAC ") {
                throw new CannotReadException("'MAC ' Header not found");
            }

            b = new byte[4];
            raf.Read(b, 0, b.Length);
            int version = Utils.GetNumber(b, 0,3);
            if(version < 3970)
                throw new CannotReadException("Monkey Audio version <= 3.97 is not supported");

            b = new byte[44];
            raf.Read(b, 0, b.Length);
            MonkeyDescriptor md = new MonkeyDescriptor(b);

            b = new byte[24];
            raf.Read(b, 0, b.Length);
            MonkeyHeader mh = new MonkeyHeader(b);

            raf.Seek(md.RiffWavOffset, SeekOrigin.Begin);
            b = new byte[12];
            raf.Read(b, 0, b.Length);
            WavRIFFHeader wrh = new WavRIFFHeader(b);
            if(!wrh.Valid)
                throw new CannotReadException("No valid RIFF Header found");

            b = new byte[24];
            raf.Read(b, 0, b.Length);
            WavFormatHeader wfh = new WavFormatHeader(b);
            if(!wfh.Valid)
                throw new CannotReadException("No valid WAV Header found");

            info.Length = mh.Length;
            info.ChannelNumber = wfh.ChannelNumber ;
            info.SamplingRate = wfh.SamplingRate ;
            info.Bitrate = ComputeBitrate(info.Length, raf.Length) ;
            info.EncodingType = "Monkey Audio v" + (((double)version)/1000)+", compression level "+mh.CompressionLevel;
            info.ExtraEncodingInfos = "";

            return info;
        }
Example #2
0
        public EncodingInfo Read(Stream raf)
        {
            EncodingInfo info = new EncodingInfo();

            //Begin info fetch-------------------------------------------
            if (raf.Length == 0)
            {
                //Empty File
                throw new CannotReadException("File is empty");
            }
            raf.Seek(0, SeekOrigin.Begin);

            //MP+ Header string
            byte[] b = new byte[4];
            raf.Read(b, 0, b.Length);
            string mpc = new string(System.Text.Encoding.ASCII.GetChars(b));

            if (mpc != "MAC ")
            {
                throw new CannotReadException("'MAC ' Header not found");
            }

            b = new byte[4];
            raf.Read(b, 0, b.Length);
            int version = Utils.GetNumber(b, 0, 3);

            if (version < 3970)
            {
                throw new CannotReadException("Monkey Audio version <= 3.97 is not supported");
            }

            b = new byte[44];
            raf.Read(b, 0, b.Length);
            MonkeyDescriptor md = new MonkeyDescriptor(b);

            b = new byte[24];
            raf.Read(b, 0, b.Length);
            MonkeyHeader mh = new MonkeyHeader(b);

            raf.Seek(md.RiffWavOffset, SeekOrigin.Begin);
            b = new byte[12];
            raf.Read(b, 0, b.Length);
            WavRIFFHeader wrh = new WavRIFFHeader(b);

            if (!wrh.Valid)
            {
                throw new CannotReadException("No valid RIFF Header found");
            }

            b = new byte[24];
            raf.Read(b, 0, b.Length);
            WavFormatHeader wfh = new WavFormatHeader(b);

            if (!wfh.Valid)
            {
                throw new CannotReadException("No valid WAV Header found");
            }

            info.Duration           = new TimeSpan(mh.Length * TimeSpan.TicksPerSecond);
            info.ChannelNumber      = wfh.ChannelNumber;
            info.SamplingRate       = wfh.SamplingRate;
            info.Bitrate            = ComputeBitrate(mh.Length, raf.Length);
            info.EncodingType       = "Monkey Audio v" + (((double)version) / 1000) + ", compression level " + mh.CompressionLevel;
            info.ExtraEncodingInfos = "";

            return(info);
        }