According to description of vaExportSurfaceHandle in libva, vaSyncSurface
must be called if the contents of the surface will be read.
Fixes ticket #9967.
Signed-off-by: Fei Wang <fei.w.w...@intel.com>
---
libavutil/hwcontext_vaapi.c | 11 ++++++++++-
1 file changed, 10 insertions(+), 1 deletion(-)
diff --git a/libavutil/hwcontext_vaapi.c b/libavutil/hwcontext_vaapi.c
index 938bd5447d..90c2c191d9 100644
--- a/libavutil/hwcontext_vaapi.c
+++ b/libavutil/hwcontext_vaapi.c
@@ -1319,8 +1319,17 @@ static int vaapi_map_to_drm_esh(AVHWFramesContext *hwfc,
AVFrame *dst,
surface_id = (VASurfaceID)(uintptr_t)src->data[3];
export_flags = VA_EXPORT_SURFACE_SEPARATE_LAYERS;
- if (flags & AV_HWFRAME_MAP_READ)
+ if (flags & AV_HWFRAME_MAP_READ) {
export_flags |= VA_EXPORT_SURFACE_READ_ONLY;
+
+ vas = vaSyncSurface(hwctx->display, surface_id);
+ if (vas != VA_STATUS_SUCCESS) {
+ av_log(hwfc, AV_LOG_ERROR, "Failed to sync surface "
+ "%#x: %d (%s).\n", surface_id, vas, vaErrorStr(vas));
+ return AVERROR(EIO);
+ }
+ }
+
if (flags & AV_HWFRAME_MAP_WRITE)
export_flags |= VA_EXPORT_SURFACE_WRITE_ONLY;
--
2.25.1
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