In dxva2 code there is bug with context_mutex usage -
if ID3D11VideoContext_DecoderBeginFrame return E_PENDING -
WaitForSingleObjectEx(context_mutex) will be called again, but each call to
it must have corresponding ReleaseMutex, otherwise it will not be released
- so after E_PENDING context mutex will never be released.
--- dxva2.c
+++ dxva2fix.c
@@ -142,11 +142,16 @@
HRESULT hr;
unsigned type;
- do {
#if CONFIG_D3D11VA
- if (avctx->pix_fmt == AV_PIX_FMT_D3D11VA_VLD) {
+ if (avctx->pix_fmt == AV_PIX_FMT_D3D11VA_VLD) {
if (D3D11VA_CONTEXT(ctx)->context_mutex != INVALID_HANDLE_VALUE)
WaitForSingleObjectEx(D3D11VA_CONTEXT(ctx)->context_mutex,
INFINITE, FALSE);
+ }
+#endif
+
+ do {
+#if CONFIG_D3D11VA
+ if (avctx->pix_fmt == AV_PIX_FMT_D3D11VA_VLD) {
hr =
ID3D11VideoContext_DecoderBeginFrame(D3D11VA_CONTEXT(ctx)->video_context,
D3D11VA_CONTEXT(ctx)->decoder,
ff_dxva2_get_surface(frame),
0, NULL);
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