- Added support for G7221 codec.

- Added support for WebRTC based audio echo cancellation.
- Minor call notification modifications.

app/src/main/kotlin/com/tutpro/baresip/BaresipService.kt

@@ -367,10 +367,8 @@ class BaresipService: Service() {
                             rejectIntent.putExtra("callp", callp)
                             val rejectPendingIntent = PendingIntent.getService(this,
                                     REJECT_REQ_CODE, rejectIntent, PendingIntent.FLAG_UPDATE_CURRENT)
-                            nb.addAction(R.drawable.ic_stat, getString(R.string.answer),
-                                    answerPendingIntent)
-                            nb.addAction(R.drawable.ic_stat, getString(R.string.reject),
-                                    rejectPendingIntent)
+                            nb.addAction(R.drawable.ic_stat, getString(R.string.answer), answerPendingIntent)
+                            nb.addAction(R.drawable.ic_stat, getString(R.string.reject), rejectPendingIntent)
                             nm.notify(CALL_NOTIFICATION_ID, nb.build())
                             return
                         }
@@ -609,13 +607,11 @@ class BaresipService: Service() {
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
             val defaultChannel = NotificationChannel(DEFAULT_CHANNEL_ID, "Default",
                     NotificationManager.IMPORTANCE_LOW)
-            defaultChannel.description = "Tells that baresip is running"
-            defaultChannel.lockscreenVisibility = Notification.VISIBILITY_PUBLIC
+            defaultChannel.lockscreenVisibility = VISIBILITY_PUBLIC
             nm.createNotificationChannel(defaultChannel)
             val highChannel = NotificationChannel(HIGH_CHANNEL_ID, "High",
                     NotificationManager.IMPORTANCE_HIGH)
-            highChannel.description = "Tells about incoming call or message"
-            highChannel.lockscreenVisibility = Notification.VISIBILITY_PRIVATE
+            highChannel.lockscreenVisibility = VISIBILITY_PUBLIC
             highChannel.enableVibration(true)
             nm.createNotificationChannel(highChannel)
         }

app/src/main/kotlin/com/tutpro/baresip/Config.kt

@@ -15,6 +15,14 @@ object Config {
             config = "${config}zrtp_hash yes\n"
             write = true
         }
+        if (!config.contains(Regex("module[ ]+webrtc_aec.so"))) {
+            config = "${config}ausrc_format s16\nauplay_format s16\nauenc_format s16\naudec_format s16\nmodule webrtc_aec.so\n"
+            write = true
+        }
+        if (!config.contains(Regex("module[ ]+g7221.so"))) {
+            config = "${config}module g7221.so\n"
+            write = true
+        }
         if (config.contains(Regex("#module_app[ ]+mwi.so"))) {
             config = config.replace(Regex("#module_app[ ]+mwi.so"),
                     "module_app mwi.so")