[PATCH v2 1/1] evr/dshow: Support NV12 in evr_render

[David Gow]

From: David Gow

Add support for NV12 to evr_render(), as otherwise no video is rendered
at all in games like Age of Empires II DE.

Signed-off-by: David Gow 
---
 dlls/evr/evr.c | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

diff --git a/dlls/evr/evr.c b/dlls/evr/evr.c
index 516427c5fff..24ee7551c5d 100644
--- a/dlls/evr/evr.c
+++ b/dlls/evr/evr.c
@@ -368,10 +368,21 @@ static HRESULT evr_copy_sample_buffer(struct evr *filter, const GUID *subtype, I
     {
         width = (3 * width + 3) & ~3;
     }
-    else
+    else if (IsEqualGUID(subtype, &MFVideoFormat_NV12))
+    {
+        /* UV plane has same width as Y (half the pixels, twice the components), but half height. */
+        lines = (lines * 3) / 2;
+    }
+    else if (IsEqualGUID(subtype, &MFVideoFormat_ARGB32)
+                || IsEqualGUID(subtype, &MFVideoFormat_RGB32))
     {
         width *= 4;
     }
+    else
+    {
+        ERR("unsupported video format %s\n", debugstr_guid(subtype));
+        return -E_UNEXPECTED;
+    }

if (FAILED(hr = IMediaSample_GetPointer(input_sample, &src)))
     {
@@ -427,7 +438,8 @@ static HRESULT evr_render(struct strmbase_renderer *iface, IMediaSample *input_s

if (IsEqualGUID(&subtype, &MFVideoFormat_ARGB32)
             || IsEqualGUID(&subtype, &MFVideoFormat_RGB32)
-            || IsEqualGUID(&subtype, &MFVideoFormat_YUY2))
+            || IsEqualGUID(&subtype, &MFVideoFormat_YUY2)
+            || IsEqualGUID(&subtype, &MFVideoFormat_NV12))
     {
         if (SUCCEEDED(hr = evr_copy_sample_buffer(filter, &subtype, input_sample, &sample)))
         {