android,ios: add defaultTrackVolume control to WebRTCModuleOptions

Author: davidliu

android/src/main/java/com/oney/WebRTCModule/PeerConnectionObserver.java

@@ -447,6 +447,8 @@ public void onAddTrack(final RtpReceiver receiver, final MediaStream[] mediaStre
             if (!existingTrack) {
                 if (track.kind().equals(MediaStreamTrack.VIDEO_TRACK_KIND)) {
                     videoTrackAdapters.addAdapter((VideoTrack) track);
+                } else if (track.kind().equals(MediaStreamTrack.AUDIO_TRACK_KIND)) {
+                    ((AudioTrack) track).setVolume(WebRTCModuleOptions.getInstance().defaultTrackVolume);
                 }
                 remoteTracks.put(track.id(), track);
             }

android/src/main/java/com/oney/WebRTCModule/WebRTCModuleOptions.java

@@ -21,6 +21,7 @@ public class WebRTCModuleOptions {
     public Logging.Severity loggingSeverity;
     public String fieldTrials;
     public boolean enableMediaProjectionService;
+    public double defaultTrackVolume = 1.0;
 
     public static WebRTCModuleOptions getInstance() {
         if (instance == null) {

ios/RCTWebRTC/WebRTCModule+RTCPeerConnection.m

@@ -20,6 +20,7 @@
 #import "WebRTCModule+RTCPeerConnection.h"
 #import "WebRTCModule+VideoTrackAdapter.h"
 #import "WebRTCModule.h"
+#import "WebRTCModuleOptions.h"
 
 @implementation RTCPeerConnection (React)
 
@@ -932,6 +933,10 @@ - (void)peerConnection:(RTC_OBJC_TYPE(RTCPeerConnection) *)peerConnection
             if (track.kind == kRTCMediaStreamTrackKindVideo) {
                 RTCVideoTrack *videoTrack = (RTCVideoTrack *)track;
                 [peerConnection addVideoTrackAdapter:videoTrack];
+            } else if (track.kind == kRTCMediaStreamTrackKindAudio) {
+                RTCAudioTrack *audioTrack = (RTCAudioTrack *)track;
+                WebRTCModuleOptions *options = [WebRTCModuleOptions sharedInstance];
+                audioTrack.source.volume = options.defaultTrackVolume;
             }
 
             peerConnection.remoteTracks[track.trackId] = track;

ios/RCTWebRTC/WebRTCModuleOptions.h

@@ -13,6 +13,8 @@ NS_ASSUME_NONNULL_BEGIN
 @property(nonatomic, assign) RTCLoggingSeverity loggingSeverity;
 @property(nonatomic, assign) BOOL enableMultitaskingCameraAccess;
 
+@property(nonatomic, assign) double defaultTrackVolume;
+
 #pragma mark - This class is a singleton
 
 + (instancetype _Nonnull)sharedInstance;

ios/RCTWebRTC/WebRTCModuleOptions.m

@@ -22,6 +22,7 @@ - (instancetype)init {
         self.videoEncoderFactory = nil;
         self.videoDecoderFactory = nil;
         self.loggingSeverity = RTCLoggingSeverityNone;
+        self.defaultTrackVolume = 1.0;
     }
 
     return self;