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dcodpg.c
Package: celp_3.2a.tar.gz　[view]
Upload User: szhypcb168
Upload Date: 2007-01-06
Package Size: 2187k
Code Size: 2k
Category:

Voice Compress

Development Platform:

Unix_Linux

dcodpg.c：Code Content
  1. /**************************************************************************
  2. *
  3. * ROUTINE
  4. * dcodpg.c
  5. *
  6. * FUNCTION
  7. *  Decodes all pitch gain values for a frame
  8. *
  9. *
  10. * SYNOPSIS
  11. * subroutine dcodpg(pgbits,bitsum1,bitsum2,bitpointer,
  12. *   nn,stream,pgs)
  13. *
  14. *   formal
  15. *
  16. *                       data    I/O
  17. *       name            type    type    function
  18. *       -------------------------------------------------------------------
  19. * pgbits int i number of bits for quantization
  20. * bitsum1 int i number of bits for odd subframes
  21. * bitsum2 int i number of bits for even subframes
  22. * bitpointer int i number of bits used
  23. * nn int i number of subframes/frame
  24. * stream short i bit stream
  25. * pgs float o vector of pitch gains
  26. *
  27. ***************************************************************************
  28. *
  29. * DESCRIPTION
  30. *
  31. *
  32. ***************************************************************************
  33. *
  34. * CALLED BY
  35. *
  36. *       celp
  37. *
  38. * CALLS
  39. *
  40. *       pitchdecode      unpack
  41. *
  42. ***************************************************************************
  43. *
  44. * REFERENCES
  45. *
  46. *
  47. **************************************************************************/
  48. dcodpg(pgbits, bitsum1, bitsum2, bitpointer, nn, stream, pgs)
  49. int pgbits, bitsum1, bitsum2, *bitpointer, nn;
  50. short stream[];
  51. float pgs[];
  53. {
  54.   int i, pointer, index;
  56.   pointer = *bitpointer;
  57.   for (i = 0; i < nn; i++)
  58.   {
  59.     unpack(stream, pgbits, &index, &pointer);
  60.     pitchdecode(index, &pgs[i]);
  61.     if (i == 0 || i == 2 || i == 4)
  62.       pointer += bitsum2 - pgbits;
  63.     else if (i == 1 || i == 3 || i == 5)
  64.       pointer += bitsum1 - pgbits;
  65.     else
  66.       printf("dcodpg:  Error in decoding pitch gainn");
  67.   }
  68.   *bitpointer += pgbits;
  69. }