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h264: Run VLC init under pthread_once 

This makes the h.264 decoder threadsafe to initialize.

Signed-off-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
This commit is contained in:
Derek Buitenhuis 2015-10-07 12:33:01 -04:00 committed by Luca Barbato
parent c53e796f8b
commit d15368ee39
2 changed files with 9 additions and 1 deletions
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9
libavcodec/h264.c
View File

@ -606,6 +606,8 @@ static int h264_init_context(AVCodecContext *avctx, H264Context *h)
return 0; return 0;
} }
static AVOnce h264_vlc_init = AV_ONCE_INIT;
av_cold int ff_h264_decode_init(AVCodecContext *avctx) av_cold int ff_h264_decode_init(AVCodecContext *avctx)
{ {
H264Context *h = avctx->priv_data; H264Context *h = avctx->priv_data;
@ -619,7 +621,11 @@ av_cold int ff_h264_decode_init(AVCodecContext *avctx)
if (!avctx->has_b_frames) if (!avctx->has_b_frames)
h->low_delay = 1; h->low_delay = 1;
ff_h264_decode_init_vlc(); ret = ff_thread_once(&h264_vlc_init, ff_h264_decode_init_vlc);
if (ret != 0) {
av_log(avctx, AV_LOG_ERROR, "pthread_once has failed.");
return AVERROR_UNKNOWN;
}
if (avctx->codec_id == AV_CODEC_ID_H264) { if (avctx->codec_id == AV_CODEC_ID_H264) {
if (avctx->ticks_per_frame == 1) if (avctx->ticks_per_frame == 1)
@ -1801,6 +1807,7 @@ AVCodec ff_h264_decoder = {
.capabilities = /*AV_CODEC_CAP_DRAW_HORIZ_BAND |*/ AV_CODEC_CAP_DR1 | .capabilities = /*AV_CODEC_CAP_DRAW_HORIZ_BAND |*/ AV_CODEC_CAP_DR1 |
AV_CODEC_CAP_DELAY | AV_CODEC_CAP_SLICE_THREADS | AV_CODEC_CAP_DELAY | AV_CODEC_CAP_SLICE_THREADS |
AV_CODEC_CAP_FRAME_THREADS, AV_CODEC_CAP_FRAME_THREADS,
.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
.flush = flush_dpb, .flush = flush_dpb,
.init_thread_copy = ONLY_IF_THREADS_ENABLED(decode_init_thread_copy), .init_thread_copy = ONLY_IF_THREADS_ENABLED(decode_init_thread_copy),
.update_thread_context = ONLY_IF_THREADS_ENABLED(ff_h264_update_thread_context), .update_thread_context = ONLY_IF_THREADS_ENABLED(ff_h264_update_thread_context),

1
libavcodec/h264.h
View File

@ -29,6 +29,7 @@
#define AVCODEC_H264_H #define AVCODEC_H264_H
#include "libavutil/intreadwrite.h" #include "libavutil/intreadwrite.h"
#include "libavutil/thread.h"
#include "cabac.h" #include "cabac.h"
#include "error_resilience.h" #include "error_resilience.h"
#include "get_bits.h" #include "get_bits.h"