Win DS Video Capture: do not add unsupported pixel formats to the capability list.

media/video/capture/win/video_capture_device_win.cc

Index: media/video/capture/win/video_capture_device_win.cc
diff --git a/media/video/capture/win/video_capture_device_win.cc b/media/video/capture/win/video_capture_device_win.cc
index f56646b3264b595905da6ca8717a4302574d87d4..e78c60450dd9bd7e2f9dba5135121109e8527dbf 100644
--- a/media/video/capture/win/video_capture_device_win.cc
+++ b/media/video/capture/win/video_capture_device_win.cc
@@ -422,17 +422,19 @@ void VideoCaptureDeviceWin::GetDeviceSupportedFormats(const Name& device,
 
       if (media_type->majortype == MEDIATYPE_Video &&
           media_type->formattype == FORMAT_VideoInfo) {
+        VideoCaptureFormat format;
+        format.pixel_format =
+            TranslateMediaSubtypeToPixelFormat(media_type->subtype);
+        if (format.pixel_format == PIXEL_FORMAT_UNKNOWN)
+          continue;
         VIDEOINFOHEADER* h =
             reinterpret_cast<VIDEOINFOHEADER*>(media_type->pbFormat);
-        VideoCaptureFormat format;
         format.frame_size.SetSize(h->bmiHeader.biWidth,
                                   h->bmiHeader.biHeight);
         // Trust the frame rate from the VIDEOINFOHEADER.
         format.frame_rate = (h->AvgTimePerFrame > 0) ?
             static_cast<int>(kSecondsToReferenceTime / h->AvgTimePerFrame) :
             0;
-        format.pixel_format =
-            TranslateMediaSubtypeToPixelFormat(media_type->subtype);
         formats->push_back(format);
         DVLOG(1) << device.name() << " resolution: "
              << format.frame_size.ToString() << ", fps: " << format.frame_rate
@@ -705,6 +707,11 @@ bool VideoCaptureDeviceWin::CreateCapabilityMap() {
     if (media_type->majortype == MEDIATYPE_Video &&
         media_type->formattype == FORMAT_VideoInfo) {
       VideoCaptureCapabilityWin capability(i);
+      capability.supported_format.pixel_format =
+          TranslateMediaSubtypeToPixelFormat(media_type->subtype);
+      if (capability.supported_format.pixel_format == PIXEL_FORMAT_UNKNOWN)
+        continue;
+
       VIDEOINFOHEADER* h =
           reinterpret_cast<VIDEOINFOHEADER*>(media_type->pbFormat);
       capability.supported_format.frame_size.SetSize(h->bmiHeader.biWidth,
@@ -745,8 +752,6 @@ bool VideoCaptureDeviceWin::CreateCapabilityMap() {
       capability.frame_rate_numerator = capability.supported_format.frame_rate;
       capability.frame_rate_denominator = 1;
 
-      capability.supported_format.pixel_format =
-          TranslateMediaSubtypeToPixelFormat(media_type->subtype);
       capabilities_.Add(capability);
     }
   }