Reload sound devices to update sound cards detection when there is a new...

Reload sound devices to update sound cards detection when there is a new device, or we lost the old device, or we’re starting the call

src/core/app/ios-app-delegate.h

@@ -19,6 +19,7 @@
 
 #include <UIKit/UIKit.h>
 #include "private.h"
+#import <UserNotifications/UserNotifications.h>
 
 @interface IosAppDelegate : NSObject {
 	std::shared_ptr<LinphonePrivate::Core> pcore;
@@ -28,5 +29,6 @@
 - (void)setCore:(std::shared_ptr<LinphonePrivate::Core>)core;
 - (void)onLinphoneCoreStart;
 - (void)onLinphoneCoreStop;
+- (void)reloadDeviceOnRouteChangeCallback: (NSNotification *) notif;
 
 @end

src/core/app/ios-app-delegate.mm

@@ -18,6 +18,7 @@
 */
 
 #include "ios-app-delegate.h"
+#import <AVFoundation/AVFoundation.h>
 
 @implementation IosAppDelegate
 
@@ -85,6 +86,78 @@
 	}
 }
 
+
+- (void)reloadDeviceOnRouteChangeCallback: (NSNotification *) notif
+{
+	AVAudioSession * audioSession = [AVAudioSession sharedInstance];
+		   
+	NSDictionary * userInfo = [notif userInfo];
+	NSInteger changeReason = [[userInfo valueForKey:AVAudioSessionRouteChangeReasonKey] integerValue];
+
+	AVAudioSessionRouteDescription *previousRoute = [userInfo valueForKey:AVAudioSessionRouteChangePreviousRouteKey];
+	AVAudioSessionRouteDescription *currentRoute = [audioSession currentRoute];
+	
+	std::string previousInputPort("No input");
+	std::string currentInputPort("No input");
+	std::string previousOutputPort("No output");
+	std::string currentOutputPort("No output");
+
+	if (previousRoute.inputs.count > 0)
+		previousInputPort = std::string([previousRoute.inputs[0].portName UTF8String]);
+	if (previousRoute.outputs.count > 0)
+		previousOutputPort = std::string([previousRoute.outputs[0].portName UTF8String]);
+	if (currentRoute.inputs.count > 0)
+		currentInputPort = std::string([currentRoute.inputs[0].portName UTF8String]);
+	if (currentRoute.outputs.count > 0)
+		currentOutputPort = std::string([currentRoute.outputs[0].portName UTF8String]);
+
+	ms_message("Previous audio route: input=%s, output=%s, New audio route: input=%s, output=%s"
+			  , previousInputPort.c_str(), previousOutputPort.c_str()
+			  , currentInputPort.c_str(), currentOutputPort.c_str());
+
+	AVAudioSessionCategory currentCategory = [audioSession category];
+	// Relevant audio devices will not be detected by [AVAudioSession availableinputs] if not in PlayAndRecord category
+	if (currentCategory != AVAudioSessionCategoryPlayAndRecord)
+	   return;
+
+	// Reload only if there was an effective change in the route ports
+	if (currentInputPort == previousInputPort && currentOutputPort == previousOutputPort)
+	   return;
+	
+	pcore->doLater([currentOutputPort, currentInputPort, changeReason, self]() {
+		
+		switch (changeReason)
+		{
+			case AVAudioSessionRouteChangeReasonNewDeviceAvailable:
+			case AVAudioSessionRouteChangeReasonOldDeviceUnavailable:
+			case AVAudioSessionRouteChangeReasonCategoryChange:
+			{
+				// We need to reload for these 3 category, because the first list of AudioDevices available may not be up to date
+				// For example, bluetooth devices would possibly not be detected before a call Start, as the AudioSession may be in a category other than AVAudioSessionCategoryPlayAndRecord
+				linphone_core_reload_sound_devices(pcore->getCCore());
+			}
+			default: {}
+		}
+		
+		// Make sure that the current device the core is using match the reality of the IOS audio route. If not, set it properly
+		const char * currentDeviceInCore = linphone_audio_device_get_device_name(linphone_core_get_output_audio_device(pcore->getCCore()));
+		if (currentDeviceInCore && strcmp(currentOutputPort.c_str(),  currentDeviceInCore) == 0) {
+			return;
+		}
+
+		bctbx_list_t * deviceIt = linphone_core_get_audio_devices(pcore->getCCore());
+		while (deviceIt != NULL) {
+			LinphoneAudioDevice * pDevice = (LinphoneAudioDevice *) deviceIt->data;
+			if (strcmp(currentInputPort.c_str(), linphone_audio_device_get_device_name(pDevice)) == 0)
+			{
+				linphone_core_set_output_audio_device(pcore->getCCore(), pDevice);
+				break;
+			}
+			deviceIt = deviceIt->next;
+		}
+	});
+}
+
 @end
 
 

src/core/platform-helpers/ios-platform-helpers.mm

@@ -40,6 +40,8 @@
 #include "private.h"
 
 #include "core/app/ios-app-delegate.h"
+
+#import <AVFoundation/AVFoundation.h>
 // =============================================================================
 
 using namespace std;
@@ -102,7 +104,7 @@ private:
 	static void sBgTaskTimeout (void *data);
 	static string getResourceDirPath (const string &framework, const string &resource);
 	static string getResourcePath (const string &framework, const string &resource);
-
+    
 	long int mCpuLockTaskId;
 	int mCpuLockCount;
 	SCNetworkReachabilityRef reachabilityRef = NULL;
@@ -148,6 +150,12 @@ IosPlatformHelpers::IosPlatformHelpers (std::shared_ptr<LinphonePrivate::Core> c
 	else
 		ms_message("IosPlatformHelpers did not find vcard grammar resource directory...");
 #endif
+    
+    [NSNotificationCenter.defaultCenter addObserver:mAppDelegate
+     selector:@selector(reloadDeviceOnRouteChangeCallback:)
+     name:AVAudioSessionRouteChangeNotification
+     object:nil];
+    
 	ms_message("IosPlatformHelpers is fully initialised");
 }
 
@@ -617,6 +625,7 @@ PlatformHelpers *createIosPlatformHelpers(std::shared_ptr<LinphonePrivate::Core>
 	return new IosPlatformHelpers(core, systemContext);
 }
 
+
 LINPHONE_END_NAMESPACE
 
 #endif