fix: fixed issue with drums example while maintaining recorder example still working (#607)

Author: poneciak57

packages/react-native-audio-api/ios/audioapi/ios/core/NativeAudioPlayer.m

@@ -35,19 +35,20 @@ - (instancetype)initWithRenderAudio:(RenderAudioBlock)renderAudio
 - (bool)start
 {
   NSLog(@"[AudioPlayer] start");
-
+  
   AudioEngine *audioEngine = [AudioEngine sharedInstance];
   assert(audioEngine != nil);
-  self.sourceNodeId = [audioEngine attachSourceNode:self.sourceNode format:self.format];
-
+  
   // AudioEngine allows us to attach and connect nodes at runtime but with few limitations
   // in this case if it is the first player and recorder started the engine we need to restart.
   // It can be optimized by tracking if we haven't break rules of at runtime modifications from docs
   // https://developer.apple.com/documentation/avfaudio/avaudioengine?language=objc
   //
   // Currently we are restarting because we do not see any significant performance issue and case when
   // you will need to start and stop player very frequently
-  return [audioEngine restartAudioEngine];
+  [audioEngine stopEngine];
+  self.sourceNodeId = [audioEngine attachSourceNode:self.sourceNode format:self.format];
+  return [audioEngine startIfNecessary];
 }
 
 - (void)stop
@@ -57,7 +58,6 @@ - (void)stop
   AudioEngine *audioEngine = [AudioEngine sharedInstance];
   assert(audioEngine != nil);
   [audioEngine detachSourceNodeWithId:self.sourceNodeId];
-  [audioEngine restartAudioEngine];
   [audioEngine stopIfNecessary];
   self.sourceNodeId = nil;
 }
@@ -67,9 +67,8 @@ - (bool)resume
   NSLog(@"[AudioPlayer] resume");
   AudioEngine *audioEngine = [AudioEngine sharedInstance];
   assert(audioEngine != nil);
-  [audioEngine startEngine];
 
-  return [audioEngine startEngine];
+  return [audioEngine startIfNecessary];
 }
 
 - (void)suspend

packages/react-native-audio-api/ios/audioapi/ios/core/NativeAudioRecorder.m

@@ -100,7 +100,6 @@ - (void)start
 {
   AudioEngine *audioEngine = [AudioEngine sharedInstance];
   assert(audioEngine != nil);
-  [audioEngine attachInputNode:self.sinkNode];
 
   // AudioEngine allows us to attach and connect nodes at runtime but with few limitations
   // in this case if it is the first recorder node and player started the engine we need to restart.
@@ -109,15 +108,16 @@ - (void)start
   //
   // Currently we are restarting because we do not see any significant performance issue and case when
   // you will need to start and stop recorder very frequently
-  [audioEngine restartAudioEngine];
+  [audioEngine stopEngine];
+  [audioEngine attachInputNode:self.sinkNode];
+  [audioEngine startIfNecessary];
 }
 
 - (void)stop
 {
   AudioEngine *audioEngine = [AudioEngine sharedInstance];
   assert(audioEngine != nil);
   [audioEngine detachInputNode];
-  [audioEngine restartAudioEngine];
   [audioEngine stopIfNecessary];
 }