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; }
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); }