主界面默认横屏，通话音质优化

nursehome/src/main/AndroidManifest.xml

@@ -82,7 +82,8 @@
         android:allowBackup="true"
         android:label="@string/app_name"
         android:supportsRtl="true">
-        <activity android:name=".activity.NurseHomeActivity">
+        <activity android:name=".activity.NurseHomeActivity"
+            android:screenOrientation="landscape">
         </activity>
 
         <activity android:name=".activity.AppUpdateActivity"

rtc-chat/src/main/java/com/wdkl/skywebrtc/engine/webrtc/WebRTCEngine.java

@@ -663,14 +663,32 @@ numb.viagenie.ca
     // 配置音频参数
     private MediaConstraints createAudioConstraints() {
         MediaConstraints audioConstraints = new MediaConstraints();
-        audioConstraints.mandatory.add(
+        /*audioConstraints.mandatory.add(
                 new MediaConstraints.KeyValuePair(AUDIO_ECHO_CANCELLATION_CONSTRAINT, "true"));
         audioConstraints.mandatory.add(
                 new MediaConstraints.KeyValuePair(AUDIO_AUTO_GAIN_CONTROL_CONSTRAINT, "false"));
         audioConstraints.mandatory.add(
                 new MediaConstraints.KeyValuePair(AUDIO_HIGH_PASS_FILTER_CONSTRAINT, "false"));
         audioConstraints.mandatory.add(
-                new MediaConstraints.KeyValuePair(AUDIO_NOISE_SUPPRESSION_CONSTRAINT, "true"));
+                new MediaConstraints.KeyValuePair(AUDIO_NOISE_SUPPRESSION_CONSTRAINT, "true"));*/
+
+
+        // 添加所有现有的音频过滤器，以避免回声
+        //回声消除
+        audioConstraints.mandatory.add(new MediaConstraints.KeyValuePair("googEchoCancellation", "true"));
+        audioConstraints.mandatory.add(new MediaConstraints.KeyValuePair("googEchoCancellation2", "true"));
+        audioConstraints.mandatory.add(new MediaConstraints.KeyValuePair("googDAEchoCancellation", "true"));
+        //自动增益
+        audioConstraints.mandatory.add(new MediaConstraints.KeyValuePair("googAutoGainControl", "true"));
+        audioConstraints.mandatory.add(new MediaConstraints.KeyValuePair("googAutoGainControl2", "true"));
+        //噪音处理
+        audioConstraints.mandatory.add(new MediaConstraints.KeyValuePair("googNoiseSuppression", "true"));
+        audioConstraints.mandatory.add(new MediaConstraints.KeyValuePair("googNoiseSuppression2", "true"));
+        audioConstraints.mandatory.add(new MediaConstraints.KeyValuePair("googTypingNoiseDetection", "true"));
+        //高音过滤
+        audioConstraints.mandatory.add(new MediaConstraints.KeyValuePair("googAudioMirroring", "false"));
+        audioConstraints.mandatory.add(new MediaConstraints.KeyValuePair("googHighpassFilter", "true"));
+
         return audioConstraints;
     }