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avfilter/allformats: make av_register_all thread safe

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use ff_thread_once

Suggested-by: wm4 <nfxjfg@googlemail.com>
Signed-off-by: Muhammad Faiz <mfcc64@gmail.com>
This commit is contained in:
Muhammad Faiz 2017-03-07 15:53:27 +07:00
parent e85e840880
commit 49635f0a46
1 changed files with 9 additions and 8 deletions
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17
libavformat/allformats.c
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@ -19,6 +19,7 @@
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "libavutil/thread.h"
#include "avformat.h"
#include "rtp.h"
#include "rdt.h"
@ -41,13 +42,8 @@
#define REGISTER_MUXDEMUX(X, x) REGISTER_MUXER(X, x); REGISTER_DEMUXER(X, x)
void av_register_all(void)
static void register_all(void)
{
static int initialized;
if (initialized)
return;
avcodec_register_all();
/* (de)muxers */
@ -383,6 +379,11 @@ void av_register_all(void)
REGISTER_DEMUXER (LIBMODPLUG, libmodplug);
REGISTER_MUXDEMUX(LIBNUT, libnut);
REGISTER_DEMUXER (LIBOPENMPT, libopenmpt);
initialized = 1;
}
void av_register_all(void)
{
AVOnce control = AV_ONCE_INIT;
ff_thread_once(&control, register_all);
}