Bug 1407919 - Part5 - Extract bit depth information from codec parameter string into VideoInfo::mBitDepth. r=jya

MozReview-Commit-ID: GUwSrpbhOxA

--HG--
extra : rebase_source : 2efbf5f6cb61b99059b2d7ae05676af72266d2c2

dom/media/fmp4/MP4Decoder.cpp

@@ -111,9 +111,16 @@ MP4Decoder::IsSupportedType(const MediaContainerType& aType,
         continue;
       }
       if (IsVP9CodecString(codec)) {
-        trackInfos.AppendElement(
+        auto trackInfo =
           CreateTrackInfoWithMIMETypeAndContainerTypeExtraParameters(
-            NS_LITERAL_CSTRING("video/vp9"), aType));
+            NS_LITERAL_CSTRING("video/vp9"), aType);
+        uint8_t profile = 0;
+        uint8_t level = 0;
+        uint8_t bitDepth = 0;
+        if (ExtractVPXCodecDetails(codec, profile, level, bitDepth)) {
+          trackInfo->GetAsVideoInfo()->mBitDepth = bitDepth;
+        }
+        trackInfos.AppendElement(Move(trackInfo));
         continue;
       }
       // Note: Only accept H.264 in a video content type, not in an audio