Esempio n. 1
0
        public void ExtractAudio(DirectoryRecord dr, string path)
        {
            int          sectorId = (int)dr.ExtentLocation;
            int          filecounter = 0;
            Int32        prev1, prev2;
            List <Int16> pcms = new List <Int16>();
            SectorHeader sh   = fs.Sectors[sectorId];

            prev1 = 0;
            prev2 = 0;
            while ((sh.Submode & Submodes.EOF) == 0)
            {
                if ((sh.Submode & Submodes.Audio) > 0)
                {
                    XASectorForm2 s = fs.ReadXA2Sector(sectorId);
                    for (int sg = 0; sg < 18; sg++)
                    {
                        byte[] data = new byte[128];
                        Array.Copy(s.Data, sg * 128, data, 0, 128);
                        ADPCMBlock block = new ADPCMBlock(data);
                        pcms.AddRange(block.getPCM(ref prev1, ref prev2));
                    }
                    if ((sh.Submode & Submodes.EOR) > 0)
                    {
                        FileStream   f  = new FileStream(Path.Combine(path, "track" + filecounter.ToString("00") + ".wav"), FileMode.Create);
                        BinaryWriter bw = new BinaryWriter(f);
                        bw.Write(Encoding.ASCII.GetBytes("RIFF")); // "RIFF"
                        bw.Write((Int32)(pcms.Count * 2) + 36);    // size of entire file with 16-bit data
                        bw.Write(Encoding.ASCII.GetBytes("WAVE")); // "WAVE"
                                                                   // chunk 1:
                        bw.Write(Encoding.ASCII.GetBytes("fmt ")); // "fmt "
                        bw.Write((Int32)16);                       // size of chunk in bytes
                        bw.Write((Int16)1);                        // 1 - for PCM
                        bw.Write((Int16)1);                        // only Stereo files in this version
                        bw.Write((Int32)44100);                    // sample rate per second (usually 44100)
                        bw.Write((Int32)(2 * 44100));              // bytes per second (usually 176400)
                        bw.Write((Int16)2);                        // data align 4 bytes (2 bytes sample stereo)
                        bw.Write((Int16)16);                       // only 16-bit in this version
                                                                   // chunk 2:
                        bw.Write(Encoding.ASCII.GetBytes("data")); // "data"
                        bw.Write((Int32)(pcms.Count * 2));         // size of audio data 16-bit
                        foreach (Int16 pcm in pcms)
                        {
                            bw.Write(pcm);
                        }
                        bw.Flush();
                        bw.Close();
                        f.Close();
                        pcms  = new List <Int16>();
                        prev1 = 0;
                        prev2 = 0;
                        filecounter++;
                    }
                }
                sectorId++;
                sh = fs.Sectors[sectorId];
            }
        }
Esempio n. 2
0
        public XASectorForm2 ReadXA2Sector(int LBAIndex)
        {
            byte[]        buffer = new byte[2352];
            SectorHeader  header = _sectors[LBAIndex];
            XASectorForm2 sector = new XASectorForm2();
            FileStream    fs     = _streams[header.FileStreamId].Item1;

            fs.Seek(header.FileStreamOffset, SeekOrigin.Begin);
            fs.Read(buffer, 0, 2352);
            sector.ReadBytes(buffer);
            return(sector);
        }