/* * 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};} void av_assert0_fpu(void) {#if HAVE_MMX_INLINE    uint16_t state[14];     __asm volatile (        "fstenv %0 \n\t"        : "+m" (state)        :        : "memory"    );    av_assert0((state[4] & 3) == 3);#endif}