1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
|
/*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "config.h"
#include "avutil.h"
#include "avassert.h"
#include "samplefmt.h"
#include "internal.h"
/**
* @file
* various utility functions
*/
#include "libavutil/ffversion.h"
const char av_util_ffversion[] = "FFmpeg version " FFMPEG_VERSION;
const char *av_version_info(void)
{
return FFMPEG_VERSION;
}
unsigned avutil_version(void)
{
av_assert0(AV_SAMPLE_FMT_DBLP == 9);
av_assert0(AVMEDIA_TYPE_ATTACHMENT == 4);
av_assert0(AV_PICTURE_TYPE_BI == 7);
av_assert0(LIBAVUTIL_VERSION_MICRO >= 100);
av_assert0(HAVE_MMX2 == HAVE_MMXEXT);
av_assert0(((size_t)-1) > 0); // C guarantees this but if false on a platform we care about revert at least b284e1ffe343d6697fb950d1ee517bafda8a9844
if (av_sat_dadd32(1, 2) != 5) {
av_log(NULL, AV_LOG_FATAL, "Libavutil has been built with a broken binutils, please upgrade binutils and rebuild\n");
abort();
}
if (llrint(1LL<<60) != 1LL<<60) {
av_log(NULL, AV_LOG_ERROR, "Libavutil has been linked to a broken llrint()\n");
}
return LIBAVUTIL_VERSION_INT;
}
const char *avutil_configuration(void)
{
return FFMPEG_CONFIGURATION;
}
const char *avutil_license(void)
{
#define LICENSE_PREFIX "libavutil license: "
return &LICENSE_PREFIX FFMPEG_LICENSE[sizeof(LICENSE_PREFIX) - 1];
}
const char *av_get_media_type_string(enum AVMediaType media_type)
{
switch (media_type) {
case AVMEDIA_TYPE_VIDEO: return "video";
case AVMEDIA_TYPE_AUDIO: return "audio";
case AVMEDIA_TYPE_DATA: return "data";
case AVMEDIA_TYPE_SUBTITLE: return "subtitle";
case AVMEDIA_TYPE_ATTACHMENT: return "attachment";
default: return NULL;
}
}
char av_get_picture_type_char(enum AVPictureType pict_type)
{
switch (pict_type) {
case AV_PICTURE_TYPE_I: return 'I';
case AV_PICTURE_TYPE_P: return 'P';
case AV_PICTURE_TYPE_B: return 'B';
case AV_PICTURE_TYPE_S: return 'S';
case AV_PICTURE_TYPE_SI: return 'i';
case AV_PICTURE_TYPE_SP: return 'p';
case AV_PICTURE_TYPE_BI: return 'b';
default: return '?';
}
}
unsigned av_int_list_length_for_size(unsigned elsize,
const void *list, uint64_t term)
{
unsigned i;
if (!list)
return 0;
#define LIST_LENGTH(type) \
{ type t = term, *l = (type *)list; for (i = 0; l[i] != t; i++); }
switch (elsize) {
case 1: LIST_LENGTH(uint8_t); break;
case 2: LIST_LENGTH(uint16_t); break;
case 4: LIST_LENGTH(uint32_t); break;
case 8: LIST_LENGTH(uint64_t); break;
default: av_assert0(!"valid element size");
}
return i;
}
char *av_fourcc_make_string(char *buf, uint32_t fourcc)
{
int i;
char *orig_buf = buf;
size_t buf_size = AV_FOURCC_MAX_STRING_SIZE;
for (i = 0; i < 4; i++) {
const int c = fourcc & 0xff;
const int print_chr = (c >= '0' && c <= '9') ||
(c >= 'a' && c <= 'z') ||
(c >= 'A' && c <= 'Z') ||
(c && strchr(". -_", c));
const int len = snprintf(buf, buf_size, print_chr ? "%c" : "[%d]", c);
if (len < 0)
break;
buf += len;
buf_size = buf_size > len ? buf_size - len : 0;
fourcc >>= 8;
}
return orig_buf;
}
AVRational av_get_time_base_q(void)
{
return (AVRational){1, AV_TIME_BASE};
}
void av_assert0_fpu(void) {
#if HAVE_MMX_INLINE
uint16_t state[14];
__asm__ volatile (
"fstenv %0 \n\t"
: "+m" (state)
:
: "memory"
);
av_assert0((state[4] & 3) == 3);
#endif
}
|
