[FFmpeg-devel] [PATCH] lavc/pthread_frame: always transfer stashed hwaccel state

[Anton Khirnov <anton@khirnov.net>]

Fixes assertion failures after avcodec_flush_buffers(), where
stashed hwaccel state is present, but prev_thread is NULL.

Found-by: Wang Bin <wbsecg1@gmail.com>
---
 libavcodec/pthread_frame.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/libavcodec/pthread_frame.c b/libavcodec/pthread_frame.c
index 066269621d..f8fddc5e4d 100644
--- a/libavcodec/pthread_frame.c
+++ b/libavcodec/pthread_frame.c
@@ -459,14 +459,14 @@ static int submit_packet(PerThreadContext *p, AVCodecContext *user_avctx,
             pthread_mutex_unlock(&p->mutex);
             return err;
         }
-
-        /* transfer hwaccel state stashed from previous thread, if any */
-        av_assert0(!p->avctx->hwaccel);
-        FFSWAP(const AVHWAccel*, p->avctx->hwaccel,                     fctx->stash_hwaccel);
-        FFSWAP(void*,            p->avctx->hwaccel_context,             fctx->stash_hwaccel_context);
-        FFSWAP(void*,            p->avctx->internal->hwaccel_priv_data, fctx->stash_hwaccel_priv);
     }
 
+    /* transfer the stashed hwaccel state, if any */
+    av_assert0(!p->avctx->hwaccel);
+    FFSWAP(const AVHWAccel*, p->avctx->hwaccel,                     fctx->stash_hwaccel);
+    FFSWAP(void*,            p->avctx->hwaccel_context,             fctx->stash_hwaccel_context);
+    FFSWAP(void*,            p->avctx->internal->hwaccel_priv_data, fctx->stash_hwaccel_priv);
+
     av_packet_unref(p->avpkt);
     ret = av_packet_ref(p->avpkt, avpkt);
     if (ret < 0) {
-- 
2.35.1

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