Change the constraints of createOffer/createAnswer as optional.

cloudwebrtc · cloudwebrtc · commit 0c1b13ab119a · 2020-11-12T19:46:20.000+08:00
diff --git a/lib/src/interface/rtc_peerconnection.dart b/lib/src/interface/rtc_peerconnection.dart
@@ -62,9 +62,10 @@ abstract class RTCPeerConnection {
 
   Future<void> setConfiguration(Map<String, dynamic> configuration);
 
-  Future<RTCSessionDescription> createOffer(Map<String, dynamic> constraints);
+  Future<RTCSessionDescription> createOffer([Map<String, dynamic> constraints]);
 
-  Future<RTCSessionDescription> createAnswer(Map<String, dynamic> constraints);
+  Future<RTCSessionDescription> createAnswer(
+      [Map<String, dynamic> constraints]);
 
   Future<void> addStream(MediaStream stream);
 
diff --git a/lib/src/native/rtc_peerconnection_impl.dart b/lib/src/native/rtc_peerconnection_impl.dart
@@ -272,7 +272,7 @@ class RTCPeerConnectionNative extends RTCPeerConnection {
 
   @override
   Future<RTCSessionDescription> createAnswer(
-      Map<String, dynamic> constraints) async {
+      [Map<String, dynamic> constraints]) async {
     try {
       final response = await _channel.invokeMethod<Map<dynamic, dynamic>>(
           'createAnswer', <String, dynamic>{
diff --git a/lib/src/web/rtc_peerconnection_impl.dart b/lib/src/web/rtc_peerconnection_impl.dart
@@ -143,14 +143,14 @@ class RTCPeerConnectionWeb extends RTCPeerConnection {
 
   @override
   Future<RTCSessionDescription> createOffer(
-      Map<String, dynamic> constraints) async {
+      [Map<String, dynamic> constraints]) async {
     final offer = await _jsPc.createOffer(constraints);
     return _sessionFromJs(offer);
   }
 
   @override
   Future<RTCSessionDescription> createAnswer(
-      Map<String, dynamic> constraints) async {
+      [Map<String, dynamic> constraints]) async {
     final answer = await _jsPc.createAnswer(constraints);
     return _sessionFromJs(answer);
   }
