More audio manager/bluetooth related fixes and improvements.

app/src/main/cpp/baresip.c

@@ -195,6 +195,9 @@ static void ua_event_handler(struct ua *ua, enum ua_event ev,
             //}
             len = re_snprintf(event_buf, sizeof event_buf, "%s", "call incoming");
             break;
+        case UA_EVENT_CALL_OUTGOING:
+            len = re_snprintf(event_buf, sizeof event_buf, "%s", "call outgoing");
+            break;
         case UA_EVENT_CALL_LOCAL_SDP:
             len = re_snprintf(event_buf, sizeof event_buf, "call %sed", prm);
             break;

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

@@ -68,9 +68,6 @@ class BaresipService: Service() {
         filesPath = filesDir.absolutePath
 
         am = getSystemService(Context.AUDIO_SERVICE) as AudioManager
-        // Hack to avoid playback delay when outgoing call is established
-        am.mode = AudioManager.MODE_IN_COMMUNICATION
-
         val rtUri = RingtoneManager.getActualDefaultRingtoneUri(applicationContext,
                 RingtoneManager.TYPE_RINGTONE)
         rt = RingtoneManager.getRingtone(applicationContext, rtUri)
@@ -509,11 +506,8 @@ class BaresipService: Service() {
                         if (!Utils.isVisible())
                             return
                     }
-                    "call offered" -> {
-                        proximitySensing(true)
-                        return
-                    }
                     "call progress", "call ringing" -> {
+                        am.mode = AudioManager.MODE_IN_COMMUNICATION
                         requestAudioFocus(AudioAttributes.USAGE_VOICE_COMMUNICATION,
                             AudioAttributes.CONTENT_TYPE_SPEECH)
                         setCallVolume()
@@ -605,8 +599,20 @@ class BaresipService: Service() {
                             return
                         }
                     }
+                    "call outgoing" -> {
+                        am.mode = AudioManager.MODE_IN_COMMUNICATION
+                        requestAudioFocus(AudioAttributes.USAGE_VOICE_COMMUNICATION,
+                            AudioAttributes.CONTENT_TYPE_SPEECH)
+                        setCallVolume()
+                        proximitySensing(true)
+                        return
+                    }
                     "call answered" -> {
                         stopRinging()
+                        am.mode = AudioManager.MODE_IN_COMMUNICATION
+                        requestAudioFocus(AudioAttributes.USAGE_VOICE_COMMUNICATION,
+                            AudioAttributes.CONTENT_TYPE_SPEECH)
+                        setCallVolume()
                         proximitySensing(true)
                         return
                     }
@@ -625,9 +631,6 @@ class BaresipService: Service() {
                             CallHistory.save()
                             call.hasHistory = true
                         }
-                        requestAudioFocus(AudioAttributes.USAGE_VOICE_COMMUNICATION,
-                            AudioAttributes.CONTENT_TYPE_SPEECH)
-                        setCallVolume()
                         if (!Utils.isVisible())
                             return
                     }
@@ -714,6 +717,7 @@ class BaresipService: Service() {
                             } else {
                                 abandonAudioFocus()
                             }
+                            am.mode = AudioManager.MODE_NORMAL
                             proximitySensing(false)
                         }
                         if (ua.account.callHistory && !call.hasHistory) {
@@ -967,7 +971,7 @@ class BaresipService: Service() {
                 Log.d(TAG, "Audio focus granted for usage $usage")
                 audioFocusUsage = usage
                 if (isBluetoothHeadsetConnected() && !am.isBluetoothScoOn) {
-                    Log.d(TAG, "Starting Bluetooth Sco")
+                    Log.d(TAG, "Starting Bluetooth SCO")
                     am.startBluetoothSco()
                 }
             } else {
@@ -1053,7 +1057,6 @@ class BaresipService: Service() {
                 rtTimer = null
             }
             rt.stop()
-            am.mode = AudioManager.MODE_IN_COMMUNICATION
         }
     }
 
@@ -1162,6 +1165,7 @@ class BaresipService: Service() {
     }
 
     private fun cleanService() {
+        am.mode = AudioManager.MODE_NORMAL
         abandonAudioFocus()
         uas.clear()
         status.clear()