libcm is a C development framework with an emphasis on audio signal processing applications.
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cmOp.c 1.6KB

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  1. #include "cmPrefix.h"
  2. #include "cmGlobal.h"
  3. #include "cmFloatTypes.h"
  4. #include "cmOp.h"
  5. void vs_Zero( cmSample_t v[], unsigned vn)
  6. { memset(v,0,sizeof(v[0])*vn); }
  7. cmReal_t vs_Sine( cmSample_t v[], unsigned vn, cmReal_t hzRad, cmReal_t initPhs )
  8. {
  9. const cmSample_t* ep = v + vn;
  10. double phs = initPhs;
  11. while(v<ep)
  12. {
  13. *v++ = (cmSample_t)sin( phs );
  14. phs += hzRad;
  15. }
  16. return (cmReal_t)phs;
  17. }
  18. void vs_Rand( cmSample_t v[], unsigned vn, cmSample_t min, cmSample_t max )
  19. {
  20. const cmSample_t* ep = v + vn;
  21. while(v<ep)
  22. *v++ = ((cmSample_t)rand()/RAND_MAX) * (max-min) + min;
  23. }
  24. void vs_MultVVS( cmSample_t d[], const cmSample_t s[], unsigned n, cmReal_t mult )
  25. {
  26. const cmSample_t* ep = d + n;
  27. while(d<ep)
  28. *d++ = *s++ * mult;
  29. }
  30. void vs_SumMultVVS( cmSample_t d[], const cmSample_t s[], unsigned n, cmReal_t mult )
  31. {
  32. const cmSample_t* ep = d + n;
  33. while(d<ep)
  34. *d++ += *s++ * mult;
  35. }
  36. void vs_Copy( cmSample_t d[], const cmSample_t s[], unsigned n )
  37. {
  38. memcpy(d,s,n*sizeof(d[0]));
  39. }
  40. cmSample_t vs_SquaredSum( const cmSample_t s[], unsigned n )
  41. {
  42. cmSample_t sum = 0;
  43. const cmSample_t* ep = s + n;
  44. for(;s<ep;++s)
  45. sum += *s * *s;
  46. return sum;
  47. }
  48. /*
  49. unsigned vs_Interp2( cmSample_t v[], unsigned vn, const cmSample_t[] xx, const cmSample_t y[], unsigned yn )
  50. {
  51. unsigned i = 0;
  52. for(; i<vn; ++i)
  53. {
  54. double x = fmod(*xx++,yn);
  55. unsigned x0 = floor(x);
  56. unsigned x1 = x0 + 1;
  57. double d = x - x0;
  58. if( x1>=yn || x0>=yn)
  59. break;
  60. *v++ = y[x0] + (y[x1] - y[x0]) * d;
  61. }
  62. return i;
  63. }
  64. */