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  1. /*
  2.  * This file is part of FFmpeg.
  3.  *
  4.  * FFmpeg is free software; you can redistribute it and/or
  5.  * modify it under the terms of the GNU Lesser General Public
  6.  * License as published by the Free Software Foundation; either
  7.  * version 2.1 of the License, or (at your option) any later version.
  8.  *
  9.  * FFmpeg is distributed in the hope that it will be useful,
  10.  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12.  * Lesser General Public License for more details.
  13.  *
  14.  * You should have received a copy of the GNU Lesser General Public
  15.  * License along with FFmpeg; if not, write to the Free Software
  16.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  17.  */
  18.  
  19. /**
  20.  * @file
  21.  * Replacements for frequently missing libm functions
  22.  */
  23.  
  24. #ifndef AVUTIL_LIBM_H
  25. #define AVUTIL_LIBM_H
  26.  
  27. #include <math.h>
  28. #include "config.h"
  29. #include "attributes.h"
  30. #include "intfloat.h"
  31.  
  32. #if HAVE_MIPSFPU && HAVE_INLINE_ASM
  33. #include "libavutil/mips/libm_mips.h"
  34. #endif /* HAVE_MIPSFPU && HAVE_INLINE_ASM*/
  35.  
  36. #if !HAVE_ATANF
  37. #undef atanf
  38. #define atanf(x) ((float)atan(x))
  39. #endif
  40.  
  41. #if !HAVE_ATAN2F
  42. #undef atan2f
  43. #define atan2f(y, x) ((float)atan2(y, x))
  44. #endif
  45.  
  46. #if !HAVE_POWF
  47. #undef powf
  48. #define powf(x, y) ((float)pow(x, y))
  49. #endif
  50.  
  51. #if !HAVE_CBRT
  52. static av_always_inline double cbrt(double x)
  53. {
  54.     return x < 0 ? -pow(-x, 1.0 / 3.0) : pow(x, 1.0 / 3.0);
  55. }
  56. #endif
  57.  
  58. #if !HAVE_CBRTF
  59. static av_always_inline float cbrtf(float x)
  60. {
  61.     return x < 0 ? -powf(-x, 1.0 / 3.0) : powf(x, 1.0 / 3.0);
  62. }
  63. #endif
  64.  
  65. #if !HAVE_COSF
  66. #undef cosf
  67. #define cosf(x) ((float)cos(x))
  68. #endif
  69.  
  70. #if !HAVE_EXPF
  71. #undef expf
  72. #define expf(x) ((float)exp(x))
  73. #endif
  74.  
  75. #if !HAVE_EXP2
  76. #undef exp2
  77. #define exp2(x) exp((x) * 0.693147180559945)
  78. #endif /* HAVE_EXP2 */
  79.  
  80. #if !HAVE_EXP2F
  81. #undef exp2f
  82. #define exp2f(x) ((float)exp2(x))
  83. #endif /* HAVE_EXP2F */
  84.  
  85. #if !HAVE_ISINF
  86. static av_always_inline av_const int isinf(float x)
  87. {
  88.     uint32_t v = av_float2int(x);
  89.     if ((v & 0x7f800000) != 0x7f800000)
  90.         return 0;
  91.     return !(v & 0x007fffff);
  92. }
  93. #endif /* HAVE_ISINF */
  94.  
  95. #if !HAVE_ISNAN
  96. static av_always_inline av_const int isnan(float x)
  97. {
  98.     uint32_t v = av_float2int(x);
  99.     if ((v & 0x7f800000) != 0x7f800000)
  100.         return 0;
  101.     return v & 0x007fffff;
  102. }
  103. #endif /* HAVE_ISNAN */
  104.  
  105. #if !HAVE_LDEXPF
  106. #undef ldexpf
  107. #define ldexpf(x, exp) ((float)ldexp(x, exp))
  108. #endif
  109.  
  110. #if !HAVE_LLRINT
  111. #undef llrint
  112. #define llrint(x) ((long long)rint(x))
  113. #endif /* HAVE_LLRINT */
  114.  
  115. #if !HAVE_LLRINTF
  116. #undef llrintf
  117. #define llrintf(x) ((long long)rint(x))
  118. #endif /* HAVE_LLRINT */
  119.  
  120. #if !HAVE_LOG2
  121. #undef log2
  122. #define log2(x) (log(x) * 1.44269504088896340736)
  123. #endif /* HAVE_LOG2 */
  124.  
  125. #if !HAVE_LOG2F
  126. #undef log2f
  127. #define log2f(x) ((float)log2(x))
  128. #endif /* HAVE_LOG2F */
  129.  
  130. #if !HAVE_LOG10F
  131. #undef log10f
  132. #define log10f(x) ((float)log10(x))
  133. #endif
  134.  
  135. #if !HAVE_SINF
  136. #undef sinf
  137. #define sinf(x) ((float)sin(x))
  138. #endif
  139.  
  140. #if !HAVE_RINT
  141. static inline double rint(double x)
  142. {
  143.     return x >= 0 ? floor(x + 0.5) : ceil(x - 0.5);
  144. }
  145. #endif /* HAVE_RINT */
  146.  
  147. #if !HAVE_LRINT
  148. static av_always_inline av_const long int lrint(double x)
  149. {
  150.     return rint(x);
  151. }
  152. #endif /* HAVE_LRINT */
  153.  
  154. #if !HAVE_LRINTF
  155. static av_always_inline av_const long int lrintf(float x)
  156. {
  157.     return (int)(rint(x));
  158. }
  159. #endif /* HAVE_LRINTF */
  160.  
  161. #if !HAVE_ROUND
  162. static av_always_inline av_const double round(double x)
  163. {
  164.     return (x > 0) ? floor(x + 0.5) : ceil(x - 0.5);
  165. }
  166. #endif /* HAVE_ROUND */
  167.  
  168. #if !HAVE_ROUNDF
  169. static av_always_inline av_const float roundf(float x)
  170. {
  171.     return (x > 0) ? floor(x + 0.5) : ceil(x - 0.5);
  172. }
  173. #endif /* HAVE_ROUNDF */
  174.  
  175. #if !HAVE_TRUNC
  176. static av_always_inline av_const double trunc(double x)
  177. {
  178.     return (x > 0) ? floor(x) : ceil(x);
  179. }
  180. #endif /* HAVE_TRUNC */
  181.  
  182. #if !HAVE_TRUNCF
  183. static av_always_inline av_const float truncf(float x)
  184. {
  185.     return (x > 0) ? floor(x) : ceil(x);
  186. }
  187. #endif /* HAVE_TRUNCF */
  188.  
  189. #endif /* AVUTIL_LIBM_H */
  190.