[vlc-devel] [PATCH 6/6] dxva2: disable HEVC 10 bits decoding on older Intel drivers

[Steve Lhomme]

See https://communities.intel.com/thread/116386?start=15&tstart=0

Fixes #19171
---
 modules/codec/avcodec/dxva2.c | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/modules/codec/avcodec/dxva2.c b/modules/codec/avcodec/dxva2.c
index b39c47e1cf..077c118b77 100644
--- a/modules/codec/avcodec/dxva2.c
+++ b/modules/codec/avcodec/dxva2.c
@@ -494,9 +494,31 @@ static int DxGetInputList(vlc_va_t *va, input_list_t *p_list)
     return VLC_SUCCESS;
 }
 
+extern const GUID DXVA_ModeHEVC_VLD_Main10;
+static bool CanUseIntelHEVC(vlc_va_t *va)
+{
+    vlc_va_sys_t *sys = va->sys;
+    /* it should be OK starting after driver 20.19.15.4835 */
+    struct wddm_version WDMM = {
+        .wddm         = 20,
+        .d3d_features = 19,
+        .revision     = 15,
+        .build        = 4836,
+    };
+    if (D3D9CheckDriverVersion(&sys->hd3d, &sys->d3d_dev, GPU_MANUFACTURER_INTEL, &WDMM) == VLC_SUCCESS)
+        return true;
+
+    msg_Dbg(va, "HEVC not supported with these drivers");
+    return false;
+}
+
 static int DxSetupOutput(vlc_va_t *va, const GUID *input, const video_format_t *fmt)
 {
     VLC_UNUSED(fmt);
+
+    if (IsEqualGUID(input,&DXVA_ModeHEVC_VLD_Main10) && !CanUseIntelHEVC(va))
+        return VLC_EGENERIC;
+
     int err = VLC_EGENERIC;
     UINT      output_count = 0;
     D3DFORMAT *output_list = NULL;
-- 
2.14.2