mfplat: Fix buffer reading with IMF2DBuffer::Lock().

dlls/mfplat/buffer.c

@@ -311,6 +311,10 @@ static HRESULT WINAPI memory_1d_2d_buffer_Lock(IMFMediaBuffer *iface, BYTE **dat
     {
         if (!(buffer->_2d.linear_buffer = malloc(ALIGN_SIZE(buffer->_2d.plane_size, MF_64_BYTE_ALIGNMENT))))
             hr = E_OUTOFMEMORY;
+
+        if (SUCCEEDED(hr))
+            copy_image(buffer, buffer->_2d.linear_buffer, buffer->_2d.width, buffer->data, buffer->_2d.pitch,
+                    buffer->_2d.width, buffer->_2d.height);
     }
 
     if (SUCCEEDED(hr))

dlls/mfplat/tests/mfplat.c

@@ -5872,7 +5872,6 @@ static void test_MFCreate2DMediaBuffer(void)
     hr = IMFMediaBuffer_Lock(buffer, &data, NULL, NULL);
     ok(hr == S_OK, "Failed to lock buffer, hr %#lx.\n", hr);
 
-    todo_wine
     ok(memcmp(data, eight_bbs, sizeof(eight_bbs)) == 0, "Invalid data instead of 0xbb.\n");
 
     hr = IMFMediaBuffer_Unlock(buffer);