libcm is a C development framework with an emphasis on audio signal processing applications.
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cmFloatTypes.h 3.0KB

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  1. #ifndef cmFloatTypes_h
  2. #define cmFloatTypes_h
  3. #ifdef __cplusplus
  4. extern "C" {
  5. #endif
  6. //( { file_desc:"Declare the types cmReal_t and cmSample_t and define some useful limits." kw:[base]}
  7. //
  8. // For signal processing functions the cm library uses the types cmSample_t to indicate an audio
  9. // sample value and cmReal_t to specify a general purpose floating point value. The library
  10. // is designed in such a way that the actual type, float or double, for these two types may
  11. // be set at compilation time. Set the preprocessor variable CM_FLOAT_SMP to 1 to indicate
  12. // that cmSample_t will be of type 'float' otherwise it will be of type 'double'.
  13. // Set the preprocessor variable CM_FLOAT_REAL to 1 to indicate
  14. // that cmSample_t will be of type 'float' otherwise it will be of type 'double'.
  15. // By default cmSample_t is float nad cmReal_t is double.
  16. //
  17. //-----------------------------------------------------------------
  18. #ifndef CM_FLOAT_SMP
  19. #define CM_FLOAT_SMP 1
  20. #endif
  21. #if CM_FLOAT_SMP == 1
  22. typedef float cmSample_t; // cmSample_t is a float
  23. typedef float _Complex cmComplexS_t;// cmComplexS_t is single precision.
  24. #define cmSample_EPSILON FLT_EPSILON // Minimum increment between 1.0 and the next greaterv value. (1E-5)
  25. #define cmSample_MAX FLT_MAX // Maximum representable number (1E+37).
  26. #define cmSample_MIN FLT_MIN // Minimum representable number (1E-37).
  27. #else
  28. typedef double cmSample_t; // cmSample_t is a double
  29. typedef double _Complex cmComplexS_t; // cmComplexS_t is doulbe precision.
  30. #define cmSample_EPSILON DBL_EPSILON // Minimum increment between 1.0 and the next greaterv value. (1E-9)
  31. #define cmSample_MAX DBL_MAX // Maximum representable number (1E+37).
  32. #define cmSample_MIN DBL_MIN // Minimum representable number (1E-37).
  33. #endif
  34. //-----------------------------------------------------------------
  35. //-----------------------------------------------------------------
  36. //-----------------------------------------------------------------
  37. #ifndef CM_FLOAT_REAL
  38. #define CM_FLOAT_REAL 0
  39. #endif
  40. #if CM_FLOAT_REAL == 1
  41. typedef float cmReal_t; // cmReal_t is a float
  42. typedef float _Complex cmComplexR_t; // cmComplexR_t is single precision.
  43. #define cmReal_EPSILON FLT_EPSILON // Minimum increment between 1.0 and the next greaterv value. (1E-5)
  44. #define cmReal_MAX FLT_MAX // Maximum representable number (1E+37).
  45. #define cmReal_MIN FLT_MIN // Minimum representable number (1E-37).
  46. #else
  47. typedef double cmReal_t; // cmReal_t is a double.
  48. typedef double _Complex cmComplexR_t; // cmComplexR_t is double precision.
  49. #define cmReal_EPSILON DBL_EPSILON // Minimum increment between 1.0 and the next greaterv value (1E-9).
  50. #define cmReal_MAX DBL_MAX // Maximum representable number (1E+37).
  51. #define cmReal_MIN DBL_MIN // Minimum representable number (1E-37).
  52. #endif
  53. //)
  54. #ifdef __cplusplus
  55. }
  56. #endif
  57. #endif