yading@11: /*
yading@11:  * This file is part of FFmpeg.
yading@11:  *
yading@11:  * FFmpeg is free software; you can redistribute it and/or
yading@11:  * modify it under the terms of the GNU Lesser General Public
yading@11:  * License as published by the Free Software Foundation; either
yading@11:  * version 2.1 of the License, or (at your option) any later version.
yading@11:  *
yading@11:  * FFmpeg is distributed in the hope that it will be useful,
yading@11:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@11:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@11:  * Lesser General Public License for more details.
yading@11:  *
yading@11:  * You should have received a copy of the GNU Lesser General Public
yading@11:  * License along with FFmpeg; if not, write to the Free Software
yading@11:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@11:  */
yading@11: 
yading@11: #include "config.h"
yading@11: #include "avutil.h"
yading@11: #include "avassert.h"
yading@11: #include "samplefmt.h"
yading@11: #include "pixdesc.h"
yading@11: 
yading@11: /**
yading@11:  * @file
yading@11:  * various utility functions
yading@11:  */
yading@11: 
yading@11: unsigned avutil_version(void)
yading@11: {
yading@11:     static int checks_done;
yading@11:     if (checks_done)
yading@11:         return LIBAVUTIL_VERSION_INT;
yading@11: 
yading@11:     av_assert0(AV_PIX_FMT_VDA_VLD == 81); //check if the pix fmt enum has not had anything inserted or removed by mistake
yading@11:     av_assert0(AV_SAMPLE_FMT_DBLP == 9);
yading@11:     av_assert0(AVMEDIA_TYPE_ATTACHMENT == 4);
yading@11:     av_assert0(AV_PICTURE_TYPE_BI == 7);
yading@11:     av_assert0(LIBAVUTIL_VERSION_MICRO >= 100);
yading@11:     av_assert0(HAVE_MMX2 == HAVE_MMXEXT);
yading@11: 
yading@11:     if (av_sat_dadd32(1, 2) != 5) {
yading@11:         av_log(NULL, AV_LOG_FATAL, "Libavutil has been build with a broken binutils, please upgrade binutils and rebuild\n");
yading@11:         abort();
yading@11:     }
yading@11: 
yading@11:     ff_check_pixfmt_descriptors();
yading@11:     checks_done = 1;
yading@11:     return LIBAVUTIL_VERSION_INT;
yading@11: }
yading@11: 
yading@11: const char *avutil_configuration(void)
yading@11: {
yading@11:     return FFMPEG_CONFIGURATION;
yading@11: }
yading@11: 
yading@11: const char *avutil_license(void)
yading@11: {
yading@11: #define LICENSE_PREFIX "libavutil license: "
yading@11:     return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
yading@11: }
yading@11: 
yading@11: const char *av_get_media_type_string(enum AVMediaType media_type)
yading@11: {
yading@11:     switch (media_type) {
yading@11:     case AVMEDIA_TYPE_VIDEO:      return "video";
yading@11:     case AVMEDIA_TYPE_AUDIO:      return "audio";
yading@11:     case AVMEDIA_TYPE_DATA:       return "data";
yading@11:     case AVMEDIA_TYPE_SUBTITLE:   return "subtitle";
yading@11:     case AVMEDIA_TYPE_ATTACHMENT: return "attachment";
yading@11:     default:                      return NULL;
yading@11:     }
yading@11: }
yading@11: 
yading@11: char av_get_picture_type_char(enum AVPictureType pict_type)
yading@11: {
yading@11:     switch (pict_type) {
yading@11:     case AV_PICTURE_TYPE_I:  return 'I';
yading@11:     case AV_PICTURE_TYPE_P:  return 'P';
yading@11:     case AV_PICTURE_TYPE_B:  return 'B';
yading@11:     case AV_PICTURE_TYPE_S:  return 'S';
yading@11:     case AV_PICTURE_TYPE_SI: return 'i';
yading@11:     case AV_PICTURE_TYPE_SP: return 'p';
yading@11:     case AV_PICTURE_TYPE_BI: return 'b';
yading@11:     default:                 return '?';
yading@11:     }
yading@11: }
yading@11: 
yading@11: unsigned av_int_list_length_for_size(unsigned elsize,
yading@11:                                      const void *list, uint64_t term)
yading@11: {
yading@11:     unsigned i;
yading@11: 
yading@11:     if (!list)
yading@11:         return 0;
yading@11: #define LIST_LENGTH(type) \
yading@11:     { type t = term, *l = list; for (i = 0; l[i] != t; i++); }
yading@11:     switch (elsize) {
yading@11:     case 1: LIST_LENGTH(uint8_t);  break;
yading@11:     case 2: LIST_LENGTH(uint16_t); break;
yading@11:     case 4: LIST_LENGTH(uint32_t); break;
yading@11:     case 8: LIST_LENGTH(uint64_t); break;
yading@11:     default: av_assert0(!"valid element size");
yading@11:     }
yading@11:     return i;
yading@11: }