Attach color space information to hardware decoded NV12 video frames.

media/filters/h264_parser.cc

Index: media/filters/h264_parser.cc
diff --git a/media/filters/h264_parser.cc b/media/filters/h264_parser.cc
index 7aced4cdf443b7d2dda231fcc6630993d45450e6..052f441d258bc77a38f9e313ceb84bcffd5e584c 100644
--- a/media/filters/h264_parser.cc
+++ b/media/filters/h264_parser.cc
@@ -121,6 +121,24 @@ base::Optional<gfx::Rect> H264SPS::GetVisibleRect() const {
                    coded_size->height() - crop_top - crop_bottom);
 }
 
+// Based on T-REC-H.264 E.2.1, "VUI parameters semantics",
+// available from http://www.itu.int/rec/T-REC-H.264.
+gfx::ColorSpace H264SPS::GetColorSpace() const {
+  if (colour_description_present_flag) {
+    return gfx::ColorSpace(
+        colour_primaries, transfer_characteristics, matrix_coefficients,
+        video_full_range_flag ? gfx::ColorSpace::RangeID::FULL
+                              : gfx::ColorSpace::RangeID::LIMITED);
+  } else {
+    return gfx::ColorSpace(gfx::ColorSpace::PrimaryID::UNSPECIFIED,
+                           gfx::ColorSpace::TransferID::UNSPECIFIED,
+                           gfx::ColorSpace::MatrixID::UNSPECIFIED,
+                           video_full_range_flag
+                               ? gfx::ColorSpace::RangeID::FULL
+                               : gfx::ColorSpace::RangeID::LIMITED);
+  }
+}
+
 H264PPS::H264PPS() {
   memset(this, 0, sizeof(*this));
 }
@@ -813,13 +831,17 @@ H264Parser::Result H264Parser::ParseVUIParameters(H264SPS* sps) {
   if (data)
     READ_BOOL_OR_RETURN(&data);  // overscan_appropriate_flag
 
-  READ_BOOL_OR_RETURN(&data);  // video_signal_type_present_flag
-  if (data) {
-    READ_BITS_OR_RETURN(3, &data);  // video_format
-    READ_BOOL_OR_RETURN(&data);  // video_full_range_flag
-    READ_BOOL_OR_RETURN(&data);  // colour_description_present_flag
-    if (data)
-      READ_BITS_OR_RETURN(24, &data);  // color description syntax elements
+  READ_BOOL_OR_RETURN(&sps->video_signal_type_present_flag);
+  if (sps->video_signal_type_present_flag) {
+    READ_BITS_OR_RETURN(3, &sps->video_format);
+    READ_BOOL_OR_RETURN(&sps->video_full_range_flag);
+    READ_BOOL_OR_RETURN(&sps->colour_description_present_flag);
+    if (sps->colour_description_present_flag) {
+      // color description syntax elements
+      READ_BITS_OR_RETURN(8, &sps->colour_primaries);
+      READ_BITS_OR_RETURN(8, &sps->transfer_characteristics);
+      READ_BITS_OR_RETURN(8, &sps->matrix_coefficients);
+    }
   }
 
   READ_BOOL_OR_RETURN(&data);  // chroma_loc_info_present_flag