[FFmpeg-devel] [PATCH] h264_slice: correct atomics usage

[Rostislav Pehlivanov]

Reported by tmm1

Signed-off-by: Rostislav Pehlivanov <atomnuker at gmail.com>
---
 libavcodec/h264_slice.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/libavcodec/h264_slice.c b/libavcodec/h264_slice.c
index 90e05ed8f1..b381397b4d 100644
--- a/libavcodec/h264_slice.c
+++ b/libavcodec/h264_slice.c
@@ -2762,7 +2762,7 @@ int ff_h264_execute_decode_slices(H264Context *h)
 
             sl                 = &h->slice_ctx[i];
             if (CONFIG_ERROR_RESILIENCE) {
-                sl->er.error_count = 0;
+                sl->er.error_count = ATOMIC_VAR_INIT(0);
             }
 
             /* make sure none of those slices overlap */
@@ -2786,7 +2786,8 @@ int ff_h264_execute_decode_slices(H264Context *h)
         h->mb_y              = sl->mb_y;
         if (CONFIG_ERROR_RESILIENCE) {
             for (i = 1; i < context_count; i++)
-                h->slice_ctx[0].er.error_count += h->slice_ctx[i].er.error_count;
+                atomic_fetch_add(&h->slice_ctx[0].er.error_count,
+                                 atomic_load(&h->slice_ctx[i].er.error_count));
         }
 
         if (h->postpone_filter) {
-- 
2.16.2