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lagarith: assign correct per-thread value to LagarithContext::avctx.

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This fixes race conditions reported by tsan in fate-lagarith. The races
were because each thread's LagarithContext::avctx was set to the first
thread's AVCodecContext.
This commit is contained in:
Ronald S. Bultje 2017-03-28 20:11:43 -04:00
parent 73f863d751
commit 081c21ca55
1 changed files with 11 additions and 0 deletions
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11
libavcodec/lagarith.c
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@ -730,6 +730,16 @@ static av_cold int lag_decode_init(AVCodecContext *avctx)
return 0;
}
#if HAVE_THREADS
static av_cold int lag_decode_init_thread_copy(AVCodecContext *avctx)
{
LagarithContext *l = avctx->priv_data;
l->avctx = avctx;
return 0;
}
#endif
static av_cold int lag_decode_end(AVCodecContext *avctx)
{
LagarithContext *l = avctx->priv_data;
@ -746,6 +756,7 @@ AVCodec ff_lagarith_decoder = {
.id = AV_CODEC_ID_LAGARITH,
.priv_data_size = sizeof(LagarithContext),
.init = lag_decode_init,
.init_thread_copy = ONLY_IF_THREADS_ENABLED(lag_decode_init_thread_copy),
.close = lag_decode_end,
.decode = lag_decode_frame,
.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS,