2 * This file is part of FFmpeg.
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.
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.
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
22 #include "samplefmt.h"
27 * various utility functions
30 #include "libavutil/ffversion.h"
31 const char av_util_ffversion[] = "FFmpeg version " FFMPEG_VERSION;
33 const char *av_version_info(void)
35 return FFMPEG_VERSION;
38 unsigned avutil_version(void)
40 static int checks_done;
42 return LIBAVUTIL_VERSION_INT;
45 av_assert0(AV_PIX_FMT_VDA_VLD == 81); //check if the pix fmt enum has not had anything inserted or removed by mistake
47 av_assert0(AV_SAMPLE_FMT_DBLP == 9);
48 av_assert0(AVMEDIA_TYPE_ATTACHMENT == 4);
49 av_assert0(AV_PICTURE_TYPE_BI == 7);
50 av_assert0(LIBAVUTIL_VERSION_MICRO >= 100);
51 av_assert0(HAVE_MMX2 == HAVE_MMXEXT);
53 av_assert0(((size_t)-1) > 0); // C guarantees this but if false on a platform we care about revert at least b284e1ffe343d6697fb950d1ee517bafda8a9844
55 if (av_sat_dadd32(1, 2) != 5) {
56 av_log(NULL, AV_LOG_FATAL, "Libavutil has been built with a broken binutils, please upgrade binutils and rebuild\n");
60 if (llrint(1LL<<60) != 1LL<<60) {
61 av_log(NULL, AV_LOG_ERROR, "Libavutil has been linked to a broken llrint()\n");
65 return LIBAVUTIL_VERSION_INT;
68 const char *avutil_configuration(void)
70 return FFMPEG_CONFIGURATION;
73 const char *avutil_license(void)
75 #define LICENSE_PREFIX "libavutil license: "
76 return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
79 const char *av_get_media_type_string(enum AVMediaType media_type)
82 case AVMEDIA_TYPE_VIDEO: return "video";
83 case AVMEDIA_TYPE_AUDIO: return "audio";
84 case AVMEDIA_TYPE_DATA: return "data";
85 case AVMEDIA_TYPE_SUBTITLE: return "subtitle";
86 case AVMEDIA_TYPE_ATTACHMENT: return "attachment";
91 char av_get_picture_type_char(enum AVPictureType pict_type)
94 case AV_PICTURE_TYPE_I: return 'I';
95 case AV_PICTURE_TYPE_P: return 'P';
96 case AV_PICTURE_TYPE_B: return 'B';
97 case AV_PICTURE_TYPE_S: return 'S';
98 case AV_PICTURE_TYPE_SI: return 'i';
99 case AV_PICTURE_TYPE_SP: return 'p';
100 case AV_PICTURE_TYPE_BI: return 'b';
105 unsigned av_int_list_length_for_size(unsigned elsize,
106 const void *list, uint64_t term)
112 #define LIST_LENGTH(type) \
113 { type t = term, *l = (type *)list; for (i = 0; l[i] != t; i++); }
115 case 1: LIST_LENGTH(uint8_t); break;
116 case 2: LIST_LENGTH(uint16_t); break;
117 case 4: LIST_LENGTH(uint32_t); break;
118 case 8: LIST_LENGTH(uint64_t); break;
119 default: av_assert0(!"valid element size");
124 char *av_fourcc_make_string(char *buf, uint32_t fourcc)
127 char *orig_buf = buf;
128 size_t buf_size = AV_FOURCC_MAX_STRING_SIZE;
130 for (i = 0; i < 4; i++) {
131 const int c = fourcc & 0xff;
132 const int print_chr = (c >= '0' && c <= '9') ||
133 (c >= 'a' && c <= 'z') ||
134 (c >= 'A' && c <= 'Z') ||
135 (c && strchr(". -_", c));
136 const int len = snprintf(buf, buf_size, print_chr ? "%c" : "[%d]", c);
140 buf_size = buf_size > len ? buf_size - len : 0;
147 AVRational av_get_time_base_q(void)
149 return (AVRational){1, AV_TIME_BASE};
152 void av_assert0_fpu(void) {
161 av_assert0((state[4] & 3) == 3);