16 bpp video stream capture, render and WebGL usage - Realsense R200 & SR300 support.

content/browser/renderer_host/media/video_capture_manager.cc

Index: content/browser/renderer_host/media/video_capture_manager.cc
diff --git a/content/browser/renderer_host/media/video_capture_manager.cc b/content/browser/renderer_host/media/video_capture_manager.cc
index d83a3bfb9e8b89e214cbb8f98ffabb31011447b9..9a9434087cb7ea68b47aaf70a720f6fde810ce98 100644
--- a/content/browser/renderer_host/media/video_capture_manager.cc
+++ b/content/browser/renderer_host/media/video_capture_manager.cc
@@ -61,7 +61,11 @@ bool IsCaptureFormatSmaller(const media::VideoCaptureFormat& format1,
   DCHECK(format2.frame_size.GetCheckedArea().IsValid());
   if (format1.frame_size.GetCheckedArea().ValueOrDefault(0) ==
       format2.frame_size.GetCheckedArea().ValueOrDefault(0)) {
-    return format1.frame_rate > format2.frame_rate;
+    return format1.frame_rate > format2.frame_rate ||
+           // Prefer Y16 capture format for the same frame rate.
+           // This is workaround for e.g. Realsense R200 IR stream.
+           (format1.frame_rate == format2.frame_rate &&
+            (format2.pixel_format != media::PIXEL_FORMAT_Y16));
   }
   return format1.frame_size.GetCheckedArea().ValueOrDefault(0) <
          format2.frame_size.GetCheckedArea().ValueOrDefault(0);
@@ -89,9 +93,11 @@ void ConsolidateCaptureFormats(media::VideoCaptureFormats* formats) {
   formats->erase(last, formats->end());
   // Mark all formats as I420, since this is what the renderer side will get
   // anyhow: the actual pixel format is decided at the device level.
+  // Don't do this for Y16 format as it is handled separatelly.
   for (media::VideoCaptureFormats::iterator it = formats->begin();
        it != formats->end(); ++it) {
-    it->pixel_format = media::PIXEL_FORMAT_I420;
+    if (it->pixel_format != media::PIXEL_FORMAT_Y16)
+      it->pixel_format = media::PIXEL_FORMAT_I420;
   }
 }