/*
  * This file is part of FFmpeg.
  *
  * FFmpeg is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 2.1 of the License, or (at your option) any later version.
  *
  * FFmpeg is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public
  * License along with FFmpeg; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 

 #include "config.h"

 #include "avutil.h"

 #include "avassert.h"

 #include "samplefmt.h"

 #include "internal.h"

 
 /**

  * @file

  * various utility functions
  */
 

 #include "libavutil/ffversion.h"
 const char av_util_ffversion[] = "FFmpeg version " FFMPEG_VERSION;
 

 const char *av_version_info(void)

 {
     return FFMPEG_VERSION;
 }
 

 unsigned avutil_version(void)
 {

     static int checks_done;
     if (checks_done)
         return LIBAVUTIL_VERSION_INT;
 

 #if FF_API_VDPAU

     av_assert0(AV_PIX_FMT_VDA_VLD == 81); //check if the pix fmt enum has not had anything inserted or removed by mistake

 #endif

     av_assert0(AV_SAMPLE_FMT_DBLP == 9);
     av_assert0(AVMEDIA_TYPE_ATTACHMENT == 4);
     av_assert0(AV_PICTURE_TYPE_BI == 7);

     av_assert0(LIBAVUTIL_VERSION_MICRO >= 100);

     av_assert0(HAVE_MMX2 == HAVE_MMXEXT);

     av_assert0(((size_t)-1) > 0); // C guarantees this but if false on a platform we care about revert at least b284e1ffe343d6697fb950d1ee517bafda8a9844

     if (av_sat_dadd32(1, 2) != 5) {

         av_log(NULL, AV_LOG_FATAL, "Libavutil has been built with a broken binutils, please upgrade binutils and rebuild\n");

         abort();
     }
 

     if (llrint(1LL<<60) != 1LL<<60) {
         av_log(NULL, AV_LOG_ERROR, "Libavutil has been linked to a broken llrint()\n");
     }
 

     checks_done = 1;

     return LIBAVUTIL_VERSION_INT;

 }

 const char *avutil_configuration(void)

 {

     return FFMPEG_CONFIGURATION;

 }
 

 const char *avutil_license(void)

 {
 #define LICENSE_PREFIX "libavutil license: "

     return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;

 }

 const char *av_get_media_type_string(enum AVMediaType media_type)
 {
     switch (media_type) {
     case AVMEDIA_TYPE_VIDEO:      return "video";
     case AVMEDIA_TYPE_AUDIO:      return "audio";
     case AVMEDIA_TYPE_DATA:       return "data";
     case AVMEDIA_TYPE_SUBTITLE:   return "subtitle";
     case AVMEDIA_TYPE_ATTACHMENT: return "attachment";
     default:                      return NULL;
     }
 }
 

 char av_get_picture_type_char(enum AVPictureType pict_type)
 {
     switch (pict_type) {
     case AV_PICTURE_TYPE_I:  return 'I';
     case AV_PICTURE_TYPE_P:  return 'P';
     case AV_PICTURE_TYPE_B:  return 'B';
     case AV_PICTURE_TYPE_S:  return 'S';
     case AV_PICTURE_TYPE_SI: return 'i';
     case AV_PICTURE_TYPE_SP: return 'p';
     case AV_PICTURE_TYPE_BI: return 'b';
     default:                 return '?';
     }
 }

 
 unsigned av_int_list_length_for_size(unsigned elsize,
                                      const void *list, uint64_t term)
 {
     unsigned i;
 
     if (!list)
         return 0;
 #define LIST_LENGTH(type) \

     { type t = term, *l = (type *)list; for (i = 0; l[i] != t; i++); }

     switch (elsize) {
     case 1: LIST_LENGTH(uint8_t);  break;
     case 2: LIST_LENGTH(uint16_t); break;
     case 4: LIST_LENGTH(uint32_t); break;
     case 8: LIST_LENGTH(uint64_t); break;
     default: av_assert0(!"valid element size");
     }
     return i;
 }

 
 AVRational av_get_time_base_q(void)
 {
     return (AVRational){1, AV_TIME_BASE};
 }