mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2024-12-30 03:12:08 +00:00
f2b79c5b85
This avoids having to rebuild big files every time FFMPEG_VERSION changes (which it does with every commit). Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
113 lines
3.2 KiB
C
113 lines
3.2 KiB
C
/*
|
|
* 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"
|
|
|
|
/**
|
|
* @file
|
|
* various utility functions
|
|
*/
|
|
|
|
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
|
|
}
|