Separating voice activity flag from audio level in RtpHeaderExtension.

webrtc/modules/rtp_rtcp/source/rtp_utility.cc

Index: webrtc/modules/rtp_rtcp/source/rtp_utility.cc
diff --git a/webrtc/modules/rtp_rtcp/source/rtp_utility.cc b/webrtc/modules/rtp_rtcp/source/rtp_utility.cc
index 0d083bd92a5289f5c4e940c40a0eea096c01190e..a411e1e6b406b94e5306d8bf27254fc57f65ff4b 100644
--- a/webrtc/modules/rtp_rtcp/source/rtp_utility.cc
+++ b/webrtc/modules/rtp_rtcp/source/rtp_utility.cc
@@ -312,6 +312,7 @@ bool RtpHeaderParser::Parse(RTPHeader& header,
 
   // May not be present in packet.
   header.extension.hasAudioLevel = false;
+  header.extension.voiceActivity = false;
   header.extension.audioLevel = 0;
 
   // May not be present in packet.
@@ -430,7 +431,8 @@ void RtpHeaderParser::ParseOneByteExtensionHeader(
           // DEBUG_PRINT("RTP_AUDIO_LEVEL_UNIQUE_ID: ID=%u, len=%u, V=%u,
           // level=%u", ID, len, V, level);
 
-          header.extension.audioLevel = ptr[0];
+          header.extension.audioLevel = ptr[0] & 0x7f;
+          header.extension.voiceActivity = (ptr[0] & 0x80) != 0;
           header.extension.hasAudioLevel = true;
           break;
         }