Set the volume of the remote audio track, volume in [0~10]. Invalid for local track settings.

Author: zhenjiang.zhang

include/rtc_audio_track.h

@@ -12,7 +12,11 @@ namespace libwebrtc {
  * This class is a subclass of the RTCMediaTrack class, which provides a base
  * interface for all media tracks in WebRTC.
  */
-class RTCAudioTrack : public RTCMediaTrack {
+class RTCAudioTrack : public RTCMediaTrack { 
+ public:
+  // volume in [0-10]
+  virtual void SetVolume(double volume) = 0;
+  
  protected:
   /**
    * The destructor for the RTCAudioTrack class.

src/rtc_audio_track_impl.cc

@@ -14,4 +14,8 @@ AudioTrackImpl::~AudioTrackImpl() {
   RTC_LOG(LS_INFO) << __FUNCTION__ << ": dtor ";
 }
 
+void AudioTrackImpl::SetVolume(double volume) {
+  rtc_track_->GetSource()->SetVolume(volume);
+}
+
 }  // namespace libwebrtc

src/rtc_audio_track_impl.h

@@ -21,6 +21,8 @@ class AudioTrackImpl : public RTCAudioTrack {
 
   virtual ~AudioTrackImpl();
 
+  virtual void SetVolume(double volume) override;
+
   virtual const string kind() const override { return kind_; }
 
   virtual const string id() const override { return id_; }