Bug 973761 - [WebRTC] Check device capabilities (HW codec and Android ver) before enabling vp8 hardware acceleration on Fennec. r=bjacob, r=gcp

modules/libpref/src/init/all.js

@@ -277,6 +277,9 @@ pref("media.peerconnection.capture_delay", 50);
 pref("media.peerconnection.capture_delay", 50);
 #elif defined(ANDROID)
 pref("media.peerconnection.capture_delay", 100);
+// Whether to enable Webrtc Hardware acceleration support
+pref("media.navigator.hardware.vp8_encode.acceleration_enabled", false);
+pref("media.navigator.hardware.vp8_decode.acceleration_enabled", false);
 #elif defined(XP_LINUX)
 pref("media.peerconnection.capture_delay", 70);
 #else

widget/android/GfxInfo.cpp

@@ -480,7 +480,7 @@ GfxInfo::GetFeatureStatusImpl(int32_t aFeature,
       {
         // Honeycomb Samsung devices are whitelisted.
         // All other Honeycomb devices are blacklisted.
-	bool isWhitelisted =
+        bool isWhitelisted =
           cManufacturer.Equals("samsung", nsCaseInsensitiveCStringComparator());
 
         if (!isWhitelisted) {
@@ -549,6 +549,24 @@ GfxInfo::GetFeatureStatusImpl(int32_t aFeature,
         }
       }
     }
+
+    if (aFeature == FEATURE_WEBRTC_HW_ACCELERATION) {
+      NS_LossyConvertUTF16toASCII cManufacturer(mManufacturer);
+      NS_LossyConvertUTF16toASCII cModel(mModel);
+      NS_LossyConvertUTF16toASCII cHardware(mHardware);
+
+      if (cHardware.Equals("hammerhead") &&
+          CompareVersions(mOSVersion.get(), "4.4.2") >= 0 &&
+          cManufacturer.Equals("lge", nsCaseInsensitiveCStringComparator()) &&
+          cModel.Equals("nexus 5", nsCaseInsensitiveCStringComparator())) {
+        *aStatus = nsIGfxInfo::FEATURE_NO_INFO;
+        return NS_OK;
+      } else {
+        // Blocklist all other devices except Nexus 5 which VP8 hardware acceleration is supported
+        *aStatus = nsIGfxInfo::FEATURE_BLOCKED_DEVICE;
+        return NS_OK;
+      }
+    }
   }
 
   return GfxInfoBase::GetFeatureStatusImpl(aFeature, aStatus, aSuggestedDriverVersion, aDriverInfo, &os);
@@ -623,4 +641,4 @@ uint32_t GfxInfo::OperatingSystemVersion()
 }
 
 }
-}
+}

widget/nsIGfxInfo.idl

@@ -79,6 +79,8 @@ interface nsIGfxInfo : nsISupports
   const long FEATURE_WEBGL_MSAA = 8;
   /* Whether Stagefright is supported */
   const long FEATURE_STAGEFRIGHT = 9;
+  /* Whether Webrtc Hardware acceleration is supported */
+  const long FEATURE_WEBRTC_HW_ACCELERATION = 10;
 
   /*
    * A set of return values from GetFeatureStatus