Suspend and Resume OALAudioTrack on Android

Author: marcsalem

external/ObjectAL/AudioTrack/OALAudioTrack.h

@@ -67,6 +67,9 @@ BRIDGE_CLASS("com.spritebuilder.OALAudioTrack")
 	bool autoPreload;
 	bool paused;
 	bool muted;
+#if __CC_PLATFORM_ANDROID
+    bool suspended;
+#endif
 	float gain;
 	float pan;
 	NSInteger numberOfLoops;

external/ObjectAL/AudioTrack/OALAudioTrack.m

@@ -242,6 +242,10 @@ - (id) init
 		numberOfLoops = 0;
 		currentTime = 0.0;
 
+#if __CC_PLATFORM_ANDROID
+        // We have to manually pause tracks
+        suspended = NO;
+#endif
 		[[OALAudioTracks sharedInstance] notifyTrackInitializing:self];
 		[[OALAudioTracks sharedInstance] addSuspendListener:self];
 	}
@@ -593,7 +597,6 @@ - (void) setSuspended:(bool) value
 	 * TODO: Need to find a way to avoid this situation.
 	 */
 #if __CC_PLATFORM_IOS || __CC_PLATFORM_MAC
-#warning FIXME
 	OPTIONALLY_SYNCHRONIZED(self)
 	{
         if(value)
@@ -676,6 +679,21 @@ - (void) setSuspended:(bool) value
          }
          */
     }
+#elif __CC_PLATFORM_ANDROID
+	OPTIONALLY_SYNCHRONIZED(self)
+    {
+        if (value) {
+            if ([player isPlaying]) {
+                [player pause];
+                suspended = YES;
+            }
+        } else {
+            if (suspended) {
+                [player start];
+                suspended = NO;
+            }
+        }
+    }
 #endif
 }
 

external/ObjectAL/AudioTrack/OALAudioTracks.m

@@ -71,9 +71,7 @@ - (id) init
 
 		tracks = [[ALWeakArray alloc] initWithCapacity:10];
 
-#if __CC_PLATFORM_IOS || __CC_PLATFORM_MAC
 		[[OALAudioSession sharedInstance] addSuspendListener:self];
-#endif
 
         // Bug: Need to constantly poll deviceCurrentTime or else it resets to 0
         // on devices (doesn't happen in simulator).
@@ -89,9 +87,7 @@ - (id) init
 - (void) dealloc
 {
 	OAL_LOG_DEBUG(@"%@: Dealloc", self);
-#if __CC_PLATFORM_IOS || __CC_PLATFORM_MAC
 	[[OALAudioSession sharedInstance] removeSuspendListener:self];
-#endif
     [deviceTimePoller invalidate];
 
 	as_release(tracks);

external/ObjectAL/Session/OALAudioSession.h

@@ -30,21 +30,26 @@
 #import "ccMacros.h"
 
 #if __CC_PLATFORM_IOS || __CC_PLATFORM_MAC
-
 #import <Foundation/Foundation.h>
 #import <AVFoundation/AVFoundation.h>
+#endif
+
 #import "SynthesizeSingleton.h"
 #import "OALSuspendHandler.h"
 
 
 /**
  * Handles the audio session and interrupts.
  */
+#if __CC_PLATFORM_IOS || __CC_PLATFORM_MAC
 #ifdef __IPHONE_OS_VERSION_MAX_ALLOWED
 @interface OALAudioSession : NSObject <AVAudioSessionDelegate, OALSuspendManager>
 #else
 @interface OALAudioSession : NSObject <OALSuspendManager>
 #endif
+#elif __CC_PLATFORM_ANDROID
+@interface OALAudioSession : NSObject <OALSuspendManager>
+#endif
 {
     /** The current audio session category */
 	NSString* audioSessionCategory;
@@ -141,12 +146,17 @@
  */
 @property(nonatomic,readwrite,assign) bool handleInterruptions;
 
+#if __CC_PLATFORM_IOS || __CC_PLATFORM_MAC
 #ifdef __IPHONE_OS_VERSION_MAX_ALLOWED
 /** Delegate that will receive all audio session events (WEAK reference).
  */
 @property(nonatomic,readwrite,assign) id<AVAudioSessionDelegate> audioSessionDelegate;
 #endif
 
+#elif __CC_PLATFORM_ANDROID
+#warning Not implemented
+#endif
+
 /** If true, the audio session is active */
 @property(nonatomic,readwrite,assign) bool audioSessionActive;
 
@@ -203,4 +213,3 @@ SYNTHESIZE_SINGLETON_FOR_CLASS_HEADER(OALAudioSession);
 
 @end
 
-#endif // __CC_PLATFORM_IOS

external/ObjectAL/Session/OALAudioSession.m

@@ -29,12 +29,13 @@
 
 #import "OALAudioSession.h"
 
-#if __CC_PLATFORM_IOS || __CC_PLATFORM_MAC
-
-#import <AudioToolbox/AudioToolbox.h>
 #import "ObjectALMacros.h"
 #import "ARCSafe_MemMgmt.h"
 #import "OALNotifications.h"
+
+#if __CC_PLATFORM_IOS || __CC_PLATFORM_MAC
+
+#import <AudioToolbox/AudioToolbox.h>
 #import "IOSVersion.h"
 
 
@@ -777,8 +778,11 @@ - (void)inputIsAvailableChanged:(BOOL)isInputAvailable
 
 @end
 
-#else
+#endif /* __IPHONE_OS_VERSION_MAX_ALLOWED */
 
+#elif __CC_PLATFORM_ANDROID // ANDROID
+#pragma mark Android OALAudioSession
+#import "CCDirector.h"
 @implementation OALAudioSession
 
 #pragma mark Object Management
@@ -799,6 +803,10 @@ - (id) init
 		honorSilentSwitch = NO;
 
 		self.audioSessionActive = YES;
+        [[CCDirector sharedDirector] addObserver:self
+                                      forKeyPath:@"isPaused"
+                                         options:(NSKeyValueObservingOptionNew|NSKeyValueObservingOptionOld)
+                                         context:NULL];
 	}
 	return self;
 }
@@ -828,6 +836,19 @@ - (void) dealloc
 
 #pragma mark Suspend Handler
 
+- (void)observeValueForKeyPath:(NSString *)keyPath
+                      ofObject:(id)object
+                        change:(NSDictionary *)change
+                       context:(void *)context {
+    if ([keyPath isEqual:@"isPaused"]) {
+        if ([[CCDirector sharedDirector] isPaused]) {
+            [self setManuallySuspended:YES];
+        } else {
+            [self setManuallySuspended:NO];
+        }
+    }
+}
+
 - (void) addSuspendListener:(id<OALSuspendListener>) listener
 {
 	[suspendHandler addSuspendListener:listener];
@@ -885,6 +906,4 @@ - (void) forceEndInterruption
 
 @end
 
-#endif
-
-#endif // __CC_PLATFORM_IOS/MAC
+#endif /* __CC_PLATFORM_IOS/MAC/ANDROID */