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dcodcbi.c
Package: celp32c.rar　[view]
Upload User: tsjrly
Upload Date: 2021-02-19
Package Size: 107k
Code Size: 2k
Category:

Voice Compress

Development Platform:

C/C++

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