notify ms2 to update resampler to fix lost of sound when audio route changed

CHANGELOG.md

@@ -17,6 +17,7 @@ This changelog file was started on October 2019. Previous changes were more or l
 - Handling push notifications, activity monitor and Core iterate automatically in Core for Android.
 - Auto acquire and release of audio focus for Android.
 - Added API to play user's ringtone instead of default ringtone for Android.
+- New method linphone_core_audio_route_changed(), to fix audio issues when switching audio to some low sample rate Bluetooth devices.
 
 ### Changed
 - Improved Android network manager.

coreapi/linphonecore.c

@@ -7033,8 +7033,12 @@ void linphone_core_enable_callkit (LinphoneCore *lc, bool_t enabled) {
 	linphone_config_set_int(lc->config, "app", "use_callkit", (int)enabled);
 }
 
-bool_t linphone_core_callkit_enabled (const LinphoneCore *lc) {
-	return (bool_t)linphone_config_get_int(lc->config, "app", "use_callkit", 0);
+void linphone_core_audio_route_changed (LinphoneCore *core) {
+	L_GET_CPP_PTR_FROM_C_OBJECT(core)->soundcardAudioRouteChanged();
+}
+
+bool_t linphone_core_callkit_enabled (const LinphoneCore *core) {
+	return (bool_t)linphone_config_get_int(core->config, "app", "use_callkit", 0);
 }
 
 void linphone_core_set_remote_ringback_tone(LinphoneCore *lc, const char *file){

include/linphone/core_utils.h

@@ -146,13 +146,20 @@ LINPHONE_PUBLIC void linphone_core_activate_audio_session(LinphoneCore* core, bo
  */
 LINPHONE_PUBLIC void linphone_core_enable_callkit (LinphoneCore* core, bool_t enabled);
 
+/**
+ * Special function to indicate if the audio route is changed. Must be called in the callback of AVAudioSessionRouteChangeNotification.
+ * @param core The #LinphoneCore object. @notnil
+ * @ingroup IOS
+*/
+LINPHONE_PUBLIC void linphone_core_audio_route_changed (LinphoneCore *core);
+
 /**
  * Special function to check if the callkit is enabled, False by default.
  * @param core The #LinphoneCore object. @notnil
  * @return TRUE if callkit is enabled, FALSE otherwise.
  * @ingroup IOS
 */
-LINPHONE_PUBLIC bool_t linphone_core_callkit_enabled (const LinphoneCore *lc);
+LINPHONE_PUBLIC bool_t linphone_core_callkit_enabled (const LinphoneCore *core);
 
 typedef bool_t (*LinphoneCoreIterateHook)(void *data);
 

src/core/core-call.cpp

@@ -265,6 +265,13 @@ void Core::soundcardEnableCallkit (bool enabled) {
 	}
 }
 
+void Core::soundcardAudioRouteChanged () {
+	MSSndCard *card = getCCore()->sound_conf.capt_sndcard;
+	if (card) {
+		ms_snd_card_notify_audio_route_changed(card);
+	}
+}
+
 LinphoneStatus Core::terminateAllCalls () {
 	L_D();
 	auto calls = d->calls;

src/core/core.h

@@ -127,6 +127,7 @@ public:
 	void soundcardHintCheck ();
 	void soundcardActivateAudioSession (bool active);
 	void soundcardEnableCallkit (bool enabled);
+	void soundcardAudioRouteChanged ();
 	LinphoneStatus terminateAllCalls ();
 
 	// ---------------------------------------------------------------------------