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avcodec/rv34: Make initializing static VLC tables thread-safe 

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
This commit is contained in:
Andreas Rheinhardt 2020-11-17 11:13:56 +01:00
parent 88c75592bd
commit f697622f68
1 changed files with 3 additions and 2 deletions
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5
libavcodec/rv34.c
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@ -27,6 +27,7 @@
#include "libavutil/avassert.h"
#include "libavutil/imgutils.h"
#include "libavutil/internal.h"
#include "libavutil/thread.h"
#include "avcodec.h"
#include "error_resilience.h"
@ -1481,6 +1482,7 @@ static int rv34_decode_slice(RV34DecContext *r, int end, const uint8_t* buf, int
*/
av_cold int ff_rv34_decode_init(AVCodecContext *avctx)
{
static AVOnce init_static_once = AV_ONCE_INIT;
RV34DecContext *r = avctx->priv_data;
MpegEncContext *s = &r->s;
int ret;
@ -1513,8 +1515,7 @@ av_cold int ff_rv34_decode_init(AVCodecContext *avctx)
return ret;
}
if(!intra_vlcs[0].cbppattern[0].bits)
rv34_init_tables();
ff_thread_once(&init_static_once, rv34_init_tables);
return 0;
}