dts2spdif.c

   1 \r
   2 #include <stdio.h>\r
   3 //#include <stdlib.h>\r
   4 //#include <string.h>\r
   5 #include <memory.h>\r
   6 \r
   7 struct WAVEHEADER {\r
   8     unsigned long  ChunkID;\r
   9     unsigned long  ChunkSize;\r
  10     unsigned long  Format;\r
  11     unsigned long  SubChunk1ID;\r
  12     unsigned long  SubChunk1Size;\r
  13     unsigned short AudioFormat;\r
  14     unsigned short NumChannels;\r
  15     unsigned long  SampleRate;\r
  16     unsigned long  ByteRate;\r
  17     unsigned short BlockAlign;\r
  18     unsigned short BitsPerSample;\r
  19     unsigned long  SubChunk2ID;\r
  20     unsigned long  SubChunk2Size;\r
  21 };\r
  22 \r
  23 \r
  24 unsigned char burst[6144];\r
  25 \r
  26 FILE *infile, *outfile;\r
  27 \r
  28 unsigned long bytesread;\r
  29 unsigned long pcmbytes;\r
  30 unsigned long pcmbytesmultiplier;\r
  31 char sampleratecode;\r
  32 unsigned long framesize;\r
  33 \r
  34 struct WAVEHEADER wavhdr = { 0x46464952,\r
  35                                                         0,\r
  36                                                         0x45564157,\r
  37                                                         0x20746D66,\r
  38                                                         16,\r
  39                                                         1,\r
  40                                                         2,\r
  41                                                         0,\r
  42                                                         0,\r
  43                                                         4,\r
  44                                                         16,\r
  45                                                         0x61746164,\r
  46                                                         0 };\r
  47 \r
  48 unsigned long i;\r
  49 char temp;\r
  50 \r
  51 int main( int argc, char *argv[ ], char *envp[ ] )\r
  52 {\r
  53         if (argc < 3)\r
  54         {\r
  55                 printf("Wrong syntax. dts2spdif <In.dts> <Out.wav>.\n");\r
  56                 return 0;\r
  57         }\r
  58 \r
  59         infile = fopen(argv[1], "rb");\r
  60         outfile = fopen(argv[2], "wb");\r
  61         //fseek(outfile, SEEK_SET, 44);\r
  62         fwrite (&wavhdr, sizeof(struct WAVEHEADER), 1, outfile);\r
  63 \r
  64 \r
  65         for(;;)\r
  66         {\r
  67                 memset (burst, 0, 6144);\r
  68                 bytesread = fread(burst, 1, 9, infile);\r
  69                 if (bytesread < 9)\r
  70                 {\r
  71                         printf ("EOF reached (Frame Header reading)!\nCurrent position in INFILE: %i\n", ftell(infile));\r
  72                         break;\r
  73                 }\r
  74                 if (((unsigned long*)burst)[0] != 0x0180fe7f)\r
  75                 {\r
  76                         printf("ERROR: INVALID SYNCWORD !\nCurrent position in INFILE: %i\n", ftell(infile));\r
  77                         break;\r
  78                 }\r
  79                 framesize = (burst[5] & 3);\r
  80                 framesize = framesize * 4096;\r
  81                 framesize = framesize + (burst[6] * 16);\r
  82                 framesize = framesize + ((burst[7] & 240) / 16);\r
  83                 framesize = framesize + 1;\r
  84 \r
  85                 sampleratecode = ((burst[8] & 60) / 4);\r
  86 \r
  87                 if (wavhdr.SampleRate == 0)\r
  88                 {\r
  89                                 printf ("First Sampleratecode: %i\n", sampleratecode);\r
  90 \r
  91                                 switch (sampleratecode)\r
  92                                 {\r
  93                                 case 1:\r
  94                                         pcmbytesmultiplier = 4;\r
  95                                 case 2:\r
  96                                         pcmbytesmultiplier = 2;\r
  97                                 case 3:\r
  98                                         pcmbytesmultiplier = 1;\r
  99                                         wavhdr.SampleRate = 32000;\r
 100                                         wavhdr.ByteRate = 128000;\r
 101                                         break;\r
 102                                 case 6:\r
 103                                         pcmbytesmultiplier = 4;\r
 104                                 case 7:\r
 105                                         pcmbytesmultiplier = 2;\r
 106                                 case 8:\r
 107                                         pcmbytesmultiplier = 1;\r
 108                                         wavhdr.SampleRate = 44100;\r
 109                                         wavhdr.ByteRate = 176000;\r
 110                                         break;\r
 111                                 case 11:\r
 112                                         pcmbytesmultiplier = 4;\r
 113                                 case 12:\r
 114                                         pcmbytesmultiplier = 2;\r
 115                                 case 13:\r
 116                                         pcmbytesmultiplier = 1;\r
 117                                         wavhdr.SampleRate = 48000;\r
 118                                         wavhdr.ByteRate = 192000;\r
 119                                         break;\r
 120                                 default:\r
 121                                         wavhdr.SampleRate = 0;\r
 122                                         wavhdr.ByteRate = 0;\r
 123                                         printf ("Invalid Sampleratecode ! Aborting process...\n");\r
 124                                         break;\r
 125                                 }\r
 126                 }\r
 127 \r
 128                 pcmbytes = (burst[4] & 1);\r
 129                 pcmbytes = pcmbytes * 64;\r
 130                 pcmbytes = pcmbytes + ((burst[5] & 252) / 4);\r
 131                 pcmbytes = pcmbytes + 1;\r
 132                 pcmbytes = pcmbytes * 128;\r
 133                 pcmbytes = pcmbytes * pcmbytesmultiplier;\r
 134 \r
 135 \r
 136                 bytesread = fread (&burst[9], 1, framesize - 9, infile);\r
 137                 if ((bytesread + 9) < framesize)\r
 138                 {\r
 139                         printf ("EOF reached (Burst Reading)!\nCurrent position in INFILE: %i\n", ftell(infile));\r
 140                         printf ("Frame size: %i  .. Bytes read: %i\n", framesize, bytesread);\r
 141                         break;\r
 142                 }\r
 143 \r
 144                 for (i = 0; i < framesize; i += 2)\r
 145                 {\r
 146                         temp = burst[i];\r
 147                         burst[i] = burst[i + 1];\r
 148                         burst[i + 1] = temp;\r
 149                 }\r
 150 \r
 151 \r
 152                 fwrite (burst, 1, framesize, outfile);\r
 153                 if (pcmbytes > framesize)\r
 154                 {\r
 155                         fwrite ("", 1, pcmbytes - framesize, outfile);\r
 156                 }\r
 157                 else\r
 158                 {\r
 159                         printf("Warning: Frame Size > LPCM Frame Size! Buffer underrun may occur/File damaged?\n");\r
 160                         printf("Frame start at INFILE Offset: %i\n", ftell(infile) - framesize);\r
 161                 }\r
 162         }\r
 163 \r
 164         printf ("Last Sampleratecode: %i\n", sampleratecode);\r
 165 \r
 166         wavhdr.SubChunk2Size = (ftell(outfile) - 44);\r
 167         wavhdr.ChunkSize = wavhdr.SubChunk2Size + 36;\r
 168 \r
 169         fseek (outfile, SEEK_SET, 0);\r
 170         fwrite (&wavhdr, sizeof(struct WAVEHEADER), 1, outfile);\r
 171 \r
 172 \r
 173         fclose (infile);\r
 174         fclose (outfile);\r
 175 \r
 176         return 0;\r
 177 }\r