libavfilter/vf_scale_qsv: enabling d3d11va support, added mfxhdlpair

Adding DX11 relevant device type checks and adjusting callback with
proper MediaSDK pair type support.

Signed-off-by: Artem Galin <artem.galin@intel.com>

libavfilter/vf_scale_qsv.c

@@ -70,6 +70,7 @@ enum var_name {
 };
 
 #define QSV_HAVE_SCALING_CONFIG  QSV_VERSION_ATLEAST(1, 19)
+#define MFX_IMPL_VIA_MASK(impl) (0x0f00 & (impl))
 
 typedef struct QSVScaleContext {
     const AVClass *class;
@@ -259,16 +260,16 @@ static mfxStatus frame_unlock(mfxHDL pthis, mfxMemId mid, mfxFrameData *ptr)
 
 static mfxStatus frame_get_hdl(mfxHDL pthis, mfxMemId mid, mfxHDL *hdl)
 {
-    *hdl = mid;
+    mfxHDLPair *pair_dst = (mfxHDLPair*)hdl;
+    mfxHDLPair *pair_src = (mfxHDLPair*)mid;
+
+    pair_dst->first = pair_src->first;
+
+    if (pair_src->second != (mfxMemId)MFX_INFINITE)
+        pair_dst->second = pair_src->second;
     return MFX_ERR_NONE;
 }
 
-static const mfxHandleType handle_types[] = {
-    MFX_HANDLE_VA_DISPLAY,
-    MFX_HANDLE_D3D9_DEVICE_MANAGER,
-    MFX_HANDLE_D3D11_DEVICE,
-};
-
 static int init_out_session(AVFilterContext *ctx)
 {
 
@@ -300,14 +301,18 @@ static int init_out_session(AVFilterContext *ctx)
         return AVERROR_UNKNOWN;
     }
 
-    for (i = 0; i < FF_ARRAY_ELEMS(handle_types); i++) {
-        err = MFXVideoCORE_GetHandle(device_hwctx->session, handle_types[i], &handle);
-        if (err == MFX_ERR_NONE) {
-            handle_type = handle_types[i];
-            break;
-        }
+    if (MFX_IMPL_VIA_VAAPI == MFX_IMPL_VIA_MASK(impl)) {
+        handle_type = MFX_HANDLE_VA_DISPLAY;
+    } else if (MFX_IMPL_VIA_D3D11 == MFX_IMPL_VIA_MASK(impl)) {
+        handle_type = MFX_HANDLE_D3D11_DEVICE;
+    } else if (MFX_IMPL_VIA_D3D9 == MFX_IMPL_VIA_MASK(impl)) {
+        handle_type = MFX_HANDLE_D3D9_DEVICE_MANAGER;
+    } else {
+        av_log(ctx, AV_LOG_ERROR, "Error unsupported handle type\n");
+        return AVERROR_UNKNOWN;
     }
 
+    err = MFXVideoCORE_GetHandle(device_hwctx->session, handle_type, &handle);
     if (err < 0)
         return ff_qsvvpp_print_error(ctx, err, "Error getting the session handle");
     else if (err > 0) {