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2ba45a60 DM |
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 | ||
30 | unsigned 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 | ||
61 | const char *avutil_configuration(void) | |
62 | { | |
63 | return FFMPEG_CONFIGURATION; | |
64 | } | |
65 | ||
66 | const char *avutil_license(void) | |
67 | { | |
68 | #define LICENSE_PREFIX "libavutil license: " | |
69 | return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1; | |
70 | } | |
71 | ||
72 | const 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 | ||
84 | char 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 | ||
98 | unsigned 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 | ||
117 | AVRational av_get_time_base_q(void) | |
118 | { | |
119 | return (AVRational){1, AV_TIME_BASE}; | |
120 | } |