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f3d0642d35
ANSI/ISO C guarantee this, yet there is evidence that there exist platforms where its not so. See: http://www.cs.utah.edu/dept/old/texinfo/glibc-manual-0.02/library_30.html Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
114 lines
3.5 KiB
C
114 lines
3.5 KiB
C
/*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "config.h"
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#include "avutil.h"
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#include "avassert.h"
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#include "samplefmt.h"
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#include "pixdesc.h"
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/**
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* @file
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* various utility functions
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*/
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unsigned avutil_version(void)
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{
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static int checks_done;
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if (checks_done)
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return LIBAVUTIL_VERSION_INT;
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av_assert0(AV_PIX_FMT_VDA_VLD == 81); //check if the pix fmt enum has not had anything inserted or removed by mistake
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av_assert0(AV_SAMPLE_FMT_DBLP == 9);
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av_assert0(AVMEDIA_TYPE_ATTACHMENT == 4);
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av_assert0(AV_PICTURE_TYPE_BI == 7);
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av_assert0(LIBAVUTIL_VERSION_MICRO >= 100);
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av_assert0(HAVE_MMX2 == HAVE_MMXEXT);
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av_assert0(((size_t)-1) > 0); // C gurantees this but if false on a platform we care about revert at least b284e1ffe343d6697fb950d1ee517bafda8a9844
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if (av_sat_dadd32(1, 2) != 5) {
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av_log(NULL, AV_LOG_FATAL, "Libavutil has been build with a broken binutils, please upgrade binutils and rebuild\n");
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abort();
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}
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if (llrint(1LL<<60) != 1LL<<60) {
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av_log(NULL, AV_LOG_ERROR, "Libavutil has been linked to a broken llrint()\n");
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}
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ff_check_pixfmt_descriptors();
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checks_done = 1;
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return LIBAVUTIL_VERSION_INT;
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}
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const char *avutil_configuration(void)
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{
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return FFMPEG_CONFIGURATION;
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}
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const char *avutil_license(void)
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{
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#define LICENSE_PREFIX "libavutil license: "
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return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
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}
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const char *av_get_media_type_string(enum AVMediaType media_type)
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{
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switch (media_type) {
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case AVMEDIA_TYPE_VIDEO: return "video";
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case AVMEDIA_TYPE_AUDIO: return "audio";
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case AVMEDIA_TYPE_DATA: return "data";
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case AVMEDIA_TYPE_SUBTITLE: return "subtitle";
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case AVMEDIA_TYPE_ATTACHMENT: return "attachment";
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default: return NULL;
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}
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}
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char av_get_picture_type_char(enum AVPictureType pict_type)
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{
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switch (pict_type) {
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case AV_PICTURE_TYPE_I: return 'I';
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case AV_PICTURE_TYPE_P: return 'P';
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case AV_PICTURE_TYPE_B: return 'B';
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case AV_PICTURE_TYPE_S: return 'S';
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case AV_PICTURE_TYPE_SI: return 'i';
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case AV_PICTURE_TYPE_SP: return 'p';
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case AV_PICTURE_TYPE_BI: return 'b';
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default: return '?';
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}
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}
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unsigned av_int_list_length_for_size(unsigned elsize,
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const void *list, uint64_t term)
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{
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unsigned i;
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if (!list)
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return 0;
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#define LIST_LENGTH(type) \
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{ type t = term, *l = (type *)list; for (i = 0; l[i] != t; i++); }
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switch (elsize) {
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case 1: LIST_LENGTH(uint8_t); break;
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case 2: LIST_LENGTH(uint16_t); break;
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case 4: LIST_LENGTH(uint32_t); break;
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case 8: LIST_LENGTH(uint64_t); break;
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default: av_assert0(!"valid element size");
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}
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return i;
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}
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