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 "internal.h"
24
25 /**
26 * @file
27 * various utility functions
28 */
29
30 #include "libavutil/ffversion.h"
31 const char av_util_ffversion[] = "FFmpeg version " FFMPEG_VERSION;
32
av_version_info(void)33 const char *av_version_info(void)
34 {
35 return FFMPEG_VERSION;
36 }
37
avutil_version(void)38 unsigned avutil_version(void)
39 {
40 static int checks_done;
41 if (checks_done)
42 return LIBAVUTIL_VERSION_INT;
43
44 av_assert0(AV_SAMPLE_FMT_DBLP == 9);
45 av_assert0(AVMEDIA_TYPE_ATTACHMENT == 4);
46 av_assert0(AV_PICTURE_TYPE_BI == 7);
47 av_assert0(LIBAVUTIL_VERSION_MICRO >= 100);
48 av_assert0(HAVE_MMX2 == HAVE_MMXEXT);
49
50 av_assert0(((size_t)-1) > 0); // C guarantees this but if false on a platform we care about revert at least b284e1ffe343d6697fb950d1ee517bafda8a9844
51
52 if (av_sat_dadd32(1, 2) != 5) {
53 av_log(NULL, AV_LOG_FATAL, "Libavutil has been built with a broken binutils, please upgrade binutils and rebuild\n");
54 abort();
55 }
56
57 if (llrint(1LL<<60) != 1LL<<60) {
58 av_log(NULL, AV_LOG_ERROR, "Libavutil has been linked to a broken llrint()\n");
59 }
60
61 checks_done = 1;
62 return LIBAVUTIL_VERSION_INT;
63 }
64
avutil_configuration(void)65 const char *avutil_configuration(void)
66 {
67 return FFMPEG_CONFIGURATION;
68 }
69
avutil_license(void)70 const char *avutil_license(void)
71 {
72 #define LICENSE_PREFIX "libavutil license: "
73 return &LICENSE_PREFIX FFMPEG_LICENSE[sizeof(LICENSE_PREFIX) - 1];
74 }
75
av_get_media_type_string(enum AVMediaType media_type)76 const char *av_get_media_type_string(enum AVMediaType media_type)
77 {
78 switch (media_type) {
79 case AVMEDIA_TYPE_VIDEO: return "video";
80 case AVMEDIA_TYPE_AUDIO: return "audio";
81 case AVMEDIA_TYPE_DATA: return "data";
82 case AVMEDIA_TYPE_SUBTITLE: return "subtitle";
83 case AVMEDIA_TYPE_ATTACHMENT: return "attachment";
84 default: return NULL;
85 }
86 }
87
av_get_picture_type_char(enum AVPictureType pict_type)88 char av_get_picture_type_char(enum AVPictureType pict_type)
89 {
90 switch (pict_type) {
91 case AV_PICTURE_TYPE_I: return 'I';
92 case AV_PICTURE_TYPE_P: return 'P';
93 case AV_PICTURE_TYPE_B: return 'B';
94 case AV_PICTURE_TYPE_S: return 'S';
95 case AV_PICTURE_TYPE_SI: return 'i';
96 case AV_PICTURE_TYPE_SP: return 'p';
97 case AV_PICTURE_TYPE_BI: return 'b';
98 default: return '?';
99 }
100 }
101
av_int_list_length_for_size(unsigned elsize,const void * list,uint64_t term)102 unsigned av_int_list_length_for_size(unsigned elsize,
103 const void *list, uint64_t term)
104 {
105 unsigned i;
106
107 if (!list)
108 return 0;
109 #define LIST_LENGTH(type) \
110 { type t = term, *l = (type *)list; for (i = 0; l[i] != t; i++); }
111 switch (elsize) {
112 case 1: LIST_LENGTH(uint8_t); break;
113 case 2: LIST_LENGTH(uint16_t); break;
114 case 4: LIST_LENGTH(uint32_t); break;
115 case 8: LIST_LENGTH(uint64_t); break;
116 default: av_assert0(!"valid element size");
117 }
118 return i;
119 }
120
av_fourcc_make_string(char * buf,uint32_t fourcc)121 char *av_fourcc_make_string(char *buf, uint32_t fourcc)
122 {
123 int i;
124 char *orig_buf = buf;
125 size_t buf_size = AV_FOURCC_MAX_STRING_SIZE;
126
127 for (i = 0; i < 4; i++) {
128 const int c = fourcc & 0xff;
129 const int print_chr = (c >= '0' && c <= '9') ||
130 (c >= 'a' && c <= 'z') ||
131 (c >= 'A' && c <= 'Z') ||
132 (c && strchr(". -_", c));
133 const int len = snprintf(buf, buf_size, print_chr ? "%c" : "[%d]", c);
134 if (len < 0)
135 break;
136 buf += len;
137 buf_size = buf_size > len ? buf_size - len : 0;
138 fourcc >>= 8;
139 }
140
141 return orig_buf;
142 }
143
av_get_time_base_q(void)144 AVRational av_get_time_base_q(void)
145 {
146 return (AVRational){1, AV_TIME_BASE};
147 }
148
av_assert0_fpu(void)149 void av_assert0_fpu(void) {
150 #if HAVE_MMX_INLINE
151 uint16_t state[14];
152 __asm__ volatile (
153 "fstenv %0 \n\t"
154 : "+m" (state)
155 :
156 : "memory"
157 );
158 av_assert0((state[4] & 3) == 3);
159 #endif
160 }
161