Added a level controller initialization value to MediaConstraints.

webrtc/api/localaudiosource.cc

Index: webrtc/api/localaudiosource.cc
diff --git a/webrtc/api/localaudiosource.cc b/webrtc/api/localaudiosource.cc
index 53c426e01119900d5eeb5fd4a5524f2f619e954a..6f716088b04318cda9ff37230816fec177b416a3 100644
--- a/webrtc/api/localaudiosource.cc
+++ b/webrtc/api/localaudiosource.cc
@@ -66,6 +66,17 @@ void FromConstraints(const MediaConstraintsInterface::Constraints& constraints,
         entry.value = rtc::Optional<bool>(value);
     }
   }
+
+  std::string value;
+  if (constraints.FindFirst(
+          MediaConstraintsInterface::kLevelControlInitialPeakLevelDBFS,
+          &value)) {
+    float level_control_initial_peak_level_dbfs;
+    if (rtc::FromString(value, &level_control_initial_peak_level_dbfs)) {
+      options->level_control_initial_peak_level_dbfs =
+          rtc::Optional<float>(level_control_initial_peak_level_dbfs);
+    }
+  }

[aleloi, 2016/10/12 11:43:09]

I'm not sure about this. Maybe we should change the conversion algorithm
completely and have one solution for both boolean and non-boolean options?

[peah-webrtc, 2016/10/13 10:23:48]

I think it is fine to have them separated like this, but the variables for the
bool constraints should be renamed to reflect that the sets of constraints are
handled in different places.

[aleloi, 2016/10/13 10:30:47]

Acknowledged.

 }
 
 }  // namespace