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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. #include "config.h"
  20. #include "avutil.h"
  21. #include "avassert.h"
  22. #include "samplefmt.h"
  23. #include "internal.h"
  24.  
  25. /**
  26.  * @file
  27.  * various utility functions
  28.  */
  29.  
  30. #include "libavutil/ffversion.h"
  31. const char av_util_ffversion[] = "FFmpeg version " FFMPEG_VERSION;
  32.  
  33. const char *av_version_info(void)
  34. {
  35.     return FFMPEG_VERSION;
  36. }
  37.  
  38. unsigned avutil_version(void)
  39. {
  40.     static int checks_done;
  41.     if (checks_done)
  42.         return LIBAVUTIL_VERSION_INT;
  43.  
  44. #if FF_API_VDPAU
  45.     av_assert0(AV_PIX_FMT_VDA_VLD == 81); //check if the pix fmt enum has not had anything inserted or removed by mistake
  46. #endif
  47.     av_assert0(AV_SAMPLE_FMT_DBLP == 9);
  48.     av_assert0(AVMEDIA_TYPE_ATTACHMENT == 4);
  49.     av_assert0(AV_PICTURE_TYPE_BI == 7);
  50.     av_assert0(LIBAVUTIL_VERSION_MICRO >= 100);
  51.     av_assert0(HAVE_MMX2 == HAVE_MMXEXT);
  52.  
  53.     av_assert0(((size_t)-1) > 0); // C guarantees this but if false on a platform we care about revert at least b284e1ffe343d6697fb950d1ee517bafda8a9844
  54.  
  55.     if (av_sat_dadd32(1, 2) != 5) {
  56.         av_log(NULL, AV_LOG_FATAL, "Libavutil has been build with a broken binutils, please upgrade binutils and rebuild\n");
  57.         abort();
  58.     }
  59.  
  60.     if (llrint(1LL<<60) != 1LL<<60) {
  61.         av_log(NULL, AV_LOG_ERROR, "Libavutil has been linked to a broken llrint()\n");
  62.     }
  63.  
  64.     checks_done = 1;
  65.     return LIBAVUTIL_VERSION_INT;
  66. }
  67.  
  68. const char *avutil_configuration(void)
  69. {
  70.     return FFMPEG_CONFIGURATION;
  71. }
  72.  
  73. const char *avutil_license(void)
  74. {
  75. #define LICENSE_PREFIX "libavutil license: "
  76.     return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
  77. }
  78.  
  79. const char *av_get_media_type_string(enum AVMediaType media_type)
  80. {
  81.     switch (media_type) {
  82.     case AVMEDIA_TYPE_VIDEO:      return "video";
  83.     case AVMEDIA_TYPE_AUDIO:      return "audio";
  84.     case AVMEDIA_TYPE_DATA:       return "data";
  85.     case AVMEDIA_TYPE_SUBTITLE:   return "subtitle";
  86.     case AVMEDIA_TYPE_ATTACHMENT: return "attachment";
  87.     default:                      return NULL;
  88.     }
  89. }
  90.  
  91. char av_get_picture_type_char(enum AVPictureType pict_type)
  92. {
  93.     switch (pict_type) {
  94.     case AV_PICTURE_TYPE_I:  return 'I';
  95.     case AV_PICTURE_TYPE_P:  return 'P';
  96.     case AV_PICTURE_TYPE_B:  return 'B';
  97.     case AV_PICTURE_TYPE_S:  return 'S';
  98.     case AV_PICTURE_TYPE_SI: return 'i';
  99.     case AV_PICTURE_TYPE_SP: return 'p';
  100.     case AV_PICTURE_TYPE_BI: return 'b';
  101.     default:                 return '?';
  102.     }
  103. }
  104.  
  105. unsigned av_int_list_length_for_size(unsigned elsize,
  106.                                      const void *list, uint64_t term)
  107. {
  108.     unsigned i;
  109.  
  110.     if (!list)
  111.         return 0;
  112. #define LIST_LENGTH(type) \
  113.     { type t = term, *l = (type *)list; for (i = 0; l[i] != t; i++); }
  114.     switch (elsize) {
  115.     case 1: LIST_LENGTH(uint8_t);  break;
  116.     case 2: LIST_LENGTH(uint16_t); break;
  117.     case 4: LIST_LENGTH(uint32_t); break;
  118.     case 8: LIST_LENGTH(uint64_t); break;
  119.     default: av_assert0(!"valid element size");
  120.     }
  121.     return i;
  122. }
  123.  
  124. AVRational av_get_time_base_q(void)
  125. {
  126.     return (AVRational){1, AV_TIME_BASE};
  127. }
  128.