Fixes tsan warnings in fate-apng:
WARNING: ThreadSanitizer: data race (pid=51230)
Read of size 4 at 0x7d50000042fc by main thread (mutexes: write M1000):
#0 frame_copy_props frame.c:302 (ffmpeg:x86_64+0x1019a35d6)
[..]
Previous write of size 4 at 0x7d50000042fc by thread T1 (mutexes: write M997):
#0 decode_idat_chunk pngdec.c:708 (ffmpeg:x86_64+0x100f5562a)
---
libavcodec/pngdec.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/libavcodec/pngdec.c b/libavcodec/pngdec.c
index d184c34..1025519 100644
--- a/libavcodec/pngdec.c
+++ b/libavcodec/pngdec.c
@@ -701,12 +701,12 @@ static int decode_idat_chunk(AVCodecContext *avctx,
PNGDecContext *s,
if ((ret = ff_thread_get_buffer(avctx, &s->previous_picture,
AV_GET_BUFFER_FLAG_REF)) < 0)
return ret;
}
- ff_thread_finish_setup(avctx);
-
p->pict_type = AV_PICTURE_TYPE_I;
p->key_frame = 1;
p->interlaced_frame = !!s->interlace_type;
+ ff_thread_finish_setup(avctx);
+
/* compute the compressed row size */
if (!s->interlace_type) {
s->crow_size = s->row_size + 1;
--
2.8.1
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