[FFmpeg-devel] [PATCH v2] avcodec/vp8: fix multiple ff_thread_finish_setup() calls

[quinkblack at foxmail.com]

From: Zhao Zhili <zhilizhao at tencent.com>

webp decoder doesn't set update_thread_context field

$ ffmpeg -i rgb_q80.webp -f null -
[webp @ 0x7ffbd5823200] Multiple ff_thread_finish_setup() calls
---
 libavcodec/vp8.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/libavcodec/vp8.c b/libavcodec/vp8.c
index eb51d1f3c9..b4deb3ed67 100644
--- a/libavcodec/vp8.c
+++ b/libavcodec/vp8.c
@@ -2715,7 +2715,8 @@ int vp78_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
 
     s->next_framep[VP56_FRAME_CURRENT] = curframe;
 
-    ff_thread_finish_setup(avctx);
+    if (avctx->codec->update_thread_context)
+        ff_thread_finish_setup(avctx);
 
     if (avctx->hwaccel) {
         ret = avctx->hwaccel->start_frame(avctx, avpkt->data, avpkt->size);
-- 
2.22.0