Adding cbr support for Opus

webrtc/voice_engine/channel.cc

Index: webrtc/voice_engine/channel.cc
diff --git a/webrtc/voice_engine/channel.cc b/webrtc/voice_engine/channel.cc
index 1d73db6d396a29ab1bc3ca12beee0c8ce1106ae0..ab1526dd1e104556130ea2f38b070d0429555444 100644
--- a/webrtc/voice_engine/channel.cc
+++ b/webrtc/voice_engine/channel.cc
@@ -1484,6 +1484,32 @@ int Channel::GetOpusDtx(bool* enabled) {
   return success;
 }
 
+int Channel::SetOpusCbr(bool enable_cbr) {
+  WEBRTC_TRACE(kTraceInfo, kTraceVoice, VoEId(_instanceId, _channelId),
+               "Channel::SetOpusCbr(%d)", enable_cbr);
+
+  int ret = enable_cbr ? audio_coding_->EnableOpusCbr()
+                       : audio_coding_->DisableOpusCbr();
+
+  if (ret != 0) {
+    _engineStatisticsPtr->SetLastError(VE_AUDIO_CODING_MODULE_ERROR,
+                                       kTraceError, "SetOpusCbr() failed");
+    return -1;
+  }
+  return 0;
+}
+
+int Channel::GetOpusCbr(bool* enabled) {
+  int success = -1;
+  audio_coding_->QueryEncoder([&](AudioEncoder const* encoder) {
+    if (encoder) {
+      *enabled = encoder->GetCbr();
+      success = 0;
+    }
+  });
+  return success;
+}
+
 bool Channel::EnableAudioNetworkAdaptor(const std::string& config_string) {
   bool success = false;
   audio_coding_->ModifyEncoder([&](std::unique_ptr<AudioEncoder>* encoder) {