more.

cloudwebrtc · cloudwebrtc · commit e674bcb367df · 2020-10-14T08:42:51.000+08:00
diff --git a/lib/src/interface/media_constraints.dart b/lib/src/interface/media_constraints.dart
@@ -7,5 +7,57 @@ class MediaConstraints {
 class KeyValuePair {
   KeyValuePair({this.key, this.value});
   final String key;
-  final String value;
+  final dynamic value;
 }
+
+// Audio constraints.
+const String kGoogEchoCancellation = 'googEchoCancellation';
+const String kAutoGainControl = 'googAutoGainControl';
+const String kExperimentalAutoGainControl = 'googAutoGainControl2';
+const String kNoiseSuppression = 'googNoiseSuppression';
+const String kExperimentalNoiseSuppression = 'googNoiseSuppression2';
+const String kHighpassFilter = 'googHighpassFilter';
+const String kTypingNoiseDetection = 'googTypingNoiseDetection';
+const String kAudioMirroring = 'googAudioMirroring';
+const String kAudioNetworkAdaptorConfig = 'googAudioNetworkAdaptorConfig';
+
+// Constraint keys for CreateOffer / CreateAnswer defined in W3C specification.
+const String kOfferToReceiveAudio = 'OfferToReceiveAudio';
+const String kOfferToReceiveVideo = 'OfferToReceiveVideo';
+const String kVoiceActivityDetection = 'VoiceActivityDetection';
+const String kIceRestart = 'IceRestart';
+
+// Google specific constraint for BUNDLE enable/disable.
+const String kUseRtpMux = 'googUseRtpMUX';
+
+// Below constraints should be used during PeerConnection construction.
+final String kEnableDtlsSrtp = 'DtlsSrtpKeyAgreement';
+final String kEnableRtpDataChannels = 'RtpDataChannels';
+
+// Google-specific constraint keys.
+const String kEnableDscp = 'googDscp';
+const String kEnableIPv6 = 'googIPv6';
+const String kEnableVideoSuspendBelowMinBitrate = 'googSuspendBelowMinBitrate';
+const String kCombinedAudioVideoBwe = 'googCombinedAudioVideoBwe';
+const String kScreencastMinBitrate = 'googScreencastMinBitrate';
+
+// TODO(ronghuawu): Remove once cpu overuse detection is stable.
+const String kCpuOveruseDetection = 'googCpuOveruseDetection';
+const String kRawPacketizationForVideoEnabled =
+    'googRawPacketizationForVideoEnabled';
+const String kNumSimulcastLayers = 'googNumSimulcastLayers';
+
+// Video constraints.
+const String kMinAspectRatio = 'minAspectRatio';
+const String kMaxAspectRatio = 'maxAspectRatio';
+const String kMaxWidth = 'maxWidth';
+const String kMinWidth = 'minWidth';
+const String kMaxHeight = 'maxHeight';
+const String kMinHeight = 'minHeight';
+const String kMaxFrameRate = 'maxFrameRate';
+const String kMinFrameRate = 'minFrameRate';
+
+// MediaDevices
+const String kSourceId = 'sourceId';
+
+enum FacingMode { User, Environment }
