Resume audio on iOS after phone call or alarm

When a phone call or an alarm triggers on iOS, the application receives
an "audio interruption" and it's up to the application to resume
playback when the interruption ends. I added handling for audio
interruptions same as if the game is focused out and then back in.

2 files changed, 13 insertions, 1 deletions

diff --git a/drivers/coreaudio/audio_driver_coreaudio.cpp b/drivers/coreaudio/audio_driver_coreaudio.cpp
index c84469f26f..6e451eabcd 100644
--- a/drivers/coreaudio/audio_driver_coreaudio.cpp
+++ b/drivers/coreaudio/audio_driver_coreaudio.cpp
@@ -217,13 +217,24 @@ void AudioDriverCoreAudio::start() {
 	if (!active) {
 		OSStatus result = AudioOutputUnitStart(audio_unit);
 		if (result != noErr) {
-			ERR_PRINT("AudioOutputUnitStart failed");
+			ERR_PRINT(("AudioOutputUnitStart failed, code: " + itos(result)).utf8().get_data());
 		} else {
 			active = true;
 		}
 	}
 };
 
+void AudioDriverCoreAudio::stop() {
+	if (active) {
+		OSStatus result = AudioOutputUnitStop(audio_unit);
+		if (result != noErr) {
+			ERR_PRINT(("AudioOutputUnitStop failed, code: " + itos(result)).utf8().get_data());
+		} else {
+			active = false;
+		}
+	}
+}
+
 int AudioDriverCoreAudio::get_mix_rate() const {
 	return mix_rate;
 };
diff --git a/drivers/coreaudio/audio_driver_coreaudio.h b/drivers/coreaudio/audio_driver_coreaudio.h
index 9891920263..c44e225521 100644
--- a/drivers/coreaudio/audio_driver_coreaudio.h
+++ b/drivers/coreaudio/audio_driver_coreaudio.h
@@ -90,6 +90,7 @@ public:
 	virtual void finish();
 
 	bool try_lock();
+	void stop();
 
 	AudioDriverCoreAudio();
 	~AudioDriverCoreAudio();