1/*
2 * This file is part of FFmpeg.
3 *
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.
8 *
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.
13 *
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
17 */
18
19#include "config.h"
20#include "avutil.h"
21#include "avassert.h"
22#include "samplefmt.h"
23#include "pixdesc.h"
24
25/**
26 * @file
27 * various utility functions
28 */
29
30unsigned avutil_version(void)
31{
32    static int checks_done;
33    if (checks_done)
34        return LIBAVUTIL_VERSION_INT;
35
36    av_assert0(AV_PIX_FMT_VDA_VLD == 81); //check if the pix fmt enum has not had anything inserted or removed by mistake
37    av_assert0(AV_SAMPLE_FMT_DBLP == 9);
38    av_assert0(AVMEDIA_TYPE_ATTACHMENT == 4);
39    av_assert0(AV_PICTURE_TYPE_BI == 7);
40    av_assert0(LIBAVUTIL_VERSION_MICRO >= 100);
41    av_assert0(HAVE_MMX2 == HAVE_MMXEXT);
42
43    av_assert0(((size_t)-1) > 0); // C guarantees this but if false on a platform we care about revert at least b284e1ffe343d6697fb950d1ee517bafda8a9844
44
45    if (av_sat_dadd32(1, 2) != 5) {
46        av_log(NULL, AV_LOG_FATAL, "Libavutil has been build with a broken binutils, please upgrade binutils and rebuild\n");
47        abort();
48    }
49
50    if (llrint(1LL<<60) != 1LL<<60) {
51        av_log(NULL, AV_LOG_ERROR, "Libavutil has been linked to a broken llrint()\n");
52    }
53
54#if defined(ASSERT_LEVEL) && ASSERT_LEVEL > 0
55    ff_check_pixfmt_descriptors();
56#endif
57    checks_done = 1;
58    return LIBAVUTIL_VERSION_INT;
59}
60
61const char *avutil_configuration(void)
62{
63    return FFMPEG_CONFIGURATION;
64}
65
66const char *avutil_license(void)
67{
68#define LICENSE_PREFIX "libavutil license: "
69    return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
70}
71
72const char *av_get_media_type_string(enum AVMediaType media_type)
73{
74    switch (media_type) {
75    case AVMEDIA_TYPE_VIDEO:      return "video";
76    case AVMEDIA_TYPE_AUDIO:      return "audio";
77    case AVMEDIA_TYPE_DATA:       return "data";
78    case AVMEDIA_TYPE_SUBTITLE:   return "subtitle";
79    case AVMEDIA_TYPE_ATTACHMENT: return "attachment";
80    default:                      return NULL;
81    }
82}
83
84char av_get_picture_type_char(enum AVPictureType pict_type)
85{
86    switch (pict_type) {
87    case AV_PICTURE_TYPE_I:  return 'I';
88    case AV_PICTURE_TYPE_P:  return 'P';
89    case AV_PICTURE_TYPE_B:  return 'B';
90    case AV_PICTURE_TYPE_S:  return 'S';
91    case AV_PICTURE_TYPE_SI: return 'i';
92    case AV_PICTURE_TYPE_SP: return 'p';
93    case AV_PICTURE_TYPE_BI: return 'b';
94    default:                 return '?';
95    }
96}
97
98unsigned av_int_list_length_for_size(unsigned elsize,
99                                     const void *list, uint64_t term)
100{
101    unsigned i;
102
103    if (!list)
104        return 0;
105#define LIST_LENGTH(type) \
106    { type t = term, *l = (type *)list; for (i = 0; l[i] != t; i++); }
107    switch (elsize) {
108    case 1: LIST_LENGTH(uint8_t);  break;
109    case 2: LIST_LENGTH(uint16_t); break;
110    case 4: LIST_LENGTH(uint32_t); break;
111    case 8: LIST_LENGTH(uint64_t); break;
112    default: av_assert0(!"valid element size");
113    }
114    return i;
115}
116
117AVRational av_get_time_base_q(void)
118{
119    return (AVRational){1, AV_TIME_BASE};
120}
121