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