mfplat/mediatype: Do not add user data when converting from WAVE_FORMAT_EXTENSIBLE.

dlls/mfplat/mediatype.c

@@ -3011,7 +3011,7 @@ HRESULT WINAPI MFInitMediaTypeFromWaveFormatEx(IMFMediaType *mediatype, const WA
         mediatype_set_uint32(mediatype, &MF_MT_ALL_SAMPLES_INDEPENDENT, 1, &hr);
     }
 
-    if (format->cbSize)
+    if (format->cbSize && format->wFormatTag != WAVE_FORMAT_EXTENSIBLE)
         mediatype_set_blob(mediatype, &MF_MT_USER_DATA, (const UINT8 *)(format + 1), format->cbSize, &hr);
 
     return hr;

dlls/mfplat/tests/mfplat.c

@@ -5625,9 +5625,13 @@ static void test_MFInitMediaTypeFromWaveFormatEx(void)
         waveformatext.dwChannelMask = 0x8;
         memcpy(&waveformatext.SubFormat, &MFAudioFormat_Base, sizeof(waveformatext.SubFormat));
         waveformatext.SubFormat.Data1 = waveformatex_tests[i].wFormatTag;
+
         hr = MFInitMediaTypeFromWaveFormatEx(mediatype, &waveformatext.Format, sizeof(waveformatext));
         ok(hr == S_OK, "Failed to initialize media type, hr %#x.\n", hr);
 
+        hr = IMFMediaType_GetItem(mediatype, &MF_MT_USER_DATA, NULL);
+        ok(hr == MF_E_ATTRIBUTENOTFOUND, "Unexpected hr %#x.\n", hr);
+
         validate_media_type(mediatype, &waveformatext.Format);
     }