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
25 * various utility functions
28 const char *av_get_media_type_string(enum AVMediaType media_type
)
31 case AVMEDIA_TYPE_VIDEO
: return "video";
32 case AVMEDIA_TYPE_AUDIO
: return "audio";
33 case AVMEDIA_TYPE_DATA
: return "data";
34 case AVMEDIA_TYPE_SUBTITLE
: return "subtitle";
35 case AVMEDIA_TYPE_ATTACHMENT
: return "attachment";
40 char av_get_picture_type_char(enum AVPictureType pict_type
)
43 case AV_PICTURE_TYPE_I
: return 'I';
44 case AV_PICTURE_TYPE_P
: return 'P';
45 case AV_PICTURE_TYPE_B
: return 'B';
46 case AV_PICTURE_TYPE_S
: return 'S';
47 case AV_PICTURE_TYPE_SI
: return 'i';
48 case AV_PICTURE_TYPE_SP
: return 'p';
49 case AV_PICTURE_TYPE_BI
: return 'b';
54 unsigned av_int_list_length_for_size(unsigned elsize
,
55 const void *list
, uint64_t term
)
61 #define LIST_LENGTH(type) \
62 { type t = term, *l = (type *)list; for (i = 0; l[i] != t; i++); }
64 case 1: LIST_LENGTH(uint8_t); break;
65 case 2: LIST_LENGTH(uint16_t); break;
66 case 4: LIST_LENGTH(uint32_t); break;
67 case 8: LIST_LENGTH(uint64_t); break;
68 default: av_assert0(!"valid element size");
73 char *av_fourcc_make_string(char *buf
, uint32_t fourcc
)
77 size_t buf_size
= AV_FOURCC_MAX_STRING_SIZE
;
79 for (i
= 0; i
< 4; i
++) {
80 const int c
= fourcc
& 0xff;
81 const int print_chr
= (c
>= '0' && c
<= '9') ||
82 (c
>= 'a' && c
<= 'z') ||
83 (c
>= 'A' && c
<= 'Z') ||
84 (c
&& strchr(". -_", c
));
85 const int len
= snprintf(buf
, buf_size
, print_chr
? "%c" : "[%d]", c
);
89 buf_size
= buf_size
> len
? buf_size
- len
: 0;
96 AVRational
av_get_time_base_q(void)
98 return (AVRational
){1, AV_TIME_BASE
};
101 void av_assert0_fpu(void) {
110 av_assert0((state
[4] & 3) == 3);