iphone: Help with AudioToolbox Leak: Stack trace/code included here...
- by editor guy
Part of this app is a "Scream" button that plays random screams from cast members of a TV show. I have to bang on the app quite a while to see a memory leak in Instruments, but it's there, occasionally coming up (every 45 seconds to 2 minutes.) The leak is 3.50kb when it occurs. Haven't been able to crack it for several hours. Any help appreciated.
Instruments says this is the offending code line:
[appSoundPlayer play];
that's linked to from line 9 of the below stack trace:
0 libSystem.B.dylib malloc
1 libSystem.B.dylib pthread_create
2 AudioToolbox CAPThread::Start()
3 AudioToolbox GenericRunLoopThread::Start()
4 AudioToolbox AudioQueueNew(bool, AudioStreamBasicDescription const*, TCACallback const&, CACallbackTarget const&, unsigned long, OpaqueAudioQueue*)
5 AudioToolbox AudioQueueNewOutput
6 AVFoundation allocAudioQueue(AVAudioPlayer, AudioPlayerImpl*)
7 AVFoundation prepareToPlayQueue(AVAudioPlayer*, AudioPlayerImpl*)
8 AVFoundation -[AVAudioPlayer prepareToPlay]
9 Scream Queens -[ScreamViewController scream:] /Users/laptop2/Desktop/ScreamQueens Versions/ScreamQueens25/Scream Queens/Classes/../ScreamViewController.m:210
10 CoreFoundation -[NSObject performSelector:withObject:withObject:]
11 UIKit -[UIApplication sendAction:to:from:forEvent:]
12 UIKit -[UIApplication sendAction:toTarget:fromSender:forEvent:]
13 UIKit -[UIControl sendAction:to:forEvent:]
14 UIKit -[UIControl(Internal) _sendActionsForEvents:withEvent:]
15 UIKit -[UIControl touchesEnded:withEvent:]
16 UIKit -[UIWindow _sendTouchesForEvent:]
17 UIKit -[UIWindow sendEvent:]
18 UIKit -[UIApplication sendEvent:]
19 UIKit _UIApplicationHandleEvent
20 GraphicsServices PurpleEventCallback
21 CoreFoundation CFRunLoopRunSpecific
22 CoreFoundation CFRunLoopRunInMode
23 GraphicsServices GSEventRunModal
24 UIKit -[UIApplication _run]
25 UIKit UIApplicationMain
26 Scream Queens main /Users/laptop2/Desktop/ScreamQueens Versions/ScreamQueens25/Scream Queens/main.m:14
27 Scream Queens start
Here's .h:
#import <UIKit/UIKit.h>
#import <AVFoundation/AVFoundation.h>
#import <MediaPlayer/MediaPlayer.h>
#import <AudioToolbox/AudioToolbox.h>
#import <MessageUI/MessageUI.h>
#import <MessageUI/MFMailComposeViewController.h>
@interface ScreamViewController : UIViewController <UIApplicationDelegate, AVAudioPlayerDelegate, MFMailComposeViewControllerDelegate> {
//AudioPlayer related
AVAudioPlayer *appSoundPlayer;
NSURL *soundFileURL;
BOOL interruptedOnPlayback;
BOOL playing;
//Scream button related
IBOutlet UIButton *screamButton;
int currentScreamIndex;
NSString *currentScream;
NSMutableArray *screams;
NSMutableArray *personScreaming;
NSMutableArray *photoArray;
int currentSayingsIndex;
NSString *currentButtonSaying;
NSMutableArray *funnyButtonSayings;
IBOutlet UILabel *funnyButtonSayingsLabel;
IBOutlet UILabel *personScreamingField;
IBOutlet UIImageView *personScreamingImage;
//Mailing the scream related
IBOutlet UILabel *mailStatusMessage;
IBOutlet UIButton *shareButton;
}
//AudioPlayer related
@property (nonatomic, retain) AVAudioPlayer *appSoundPlayer;
@property (nonatomic, retain) NSURL *soundFileURL;
@property (readwrite) BOOL interruptedOnPlayback;
@property (readwrite) BOOL playing;
//Scream button related
@property (nonatomic, retain) UIButton *screamButton;
@property (nonatomic, retain) NSMutableArray *screams;
@property (nonatomic, retain) NSMutableArray *personScreaming;
@property (nonatomic, retain) NSMutableArray *photoArray;
@property (nonatomic, retain) UILabel *personScreamingField;
@property (nonatomic, retain) UIImageView *personScreamingImage;
@property (nonatomic, retain) NSMutableArray *funnyButtonSayings;
@property (nonatomic, retain) UILabel *funnyButtonSayingsLabel;
//Mailing the scream related
@property (nonatomic, retain) IBOutlet UILabel *mailStatusMessage;
@property (nonatomic, retain) IBOutlet UIButton *shareButton;
//Scream Button
- (IBAction) scream: (id) sender;
//Mail the scream
- (IBAction) showPicker: (id)sender;
- (void)displayComposerSheet;
- (void)launchMailAppOnDevice;
@end
Here's the top of .m:
#import "ScreamViewController.h"
//top of code has Audio session callback function for responding to audio route changes (from Apple's code), then my code continues...
@implementation ScreamViewController
@synthesize appSoundPlayer; // AVAudioPlayer object for playing the selected scream
@synthesize soundFileURL; // Path to the scream
@synthesize interruptedOnPlayback; // Was application interrupted during audio playback
@synthesize playing; // Track playing/not playing state
@synthesize screamButton; //Press this button, girls scream.
@synthesize screams; //Mutable array holding strings pointing to sound files of screams.
@synthesize personScreaming; //Mutable array tracking the person doing the screaming
@synthesize photoArray; //Mutable array holding strings pointing to photos of screaming girls
@synthesize personScreamingField; //Field updates to announce which girl is screaming.
@synthesize personScreamingImage; //Updates to show image of the screamer.
@synthesize funnyButtonSayings; //Mutable array holding the sayings
@synthesize funnyButtonSayingsLabel; //Label that updates with the funnyButtonSayings
@synthesize mailStatusMessage; //did the email go out
@synthesize shareButton; //share scream via email
Next line begins the block with the offending code:
- (IBAction) scream: (id) sender
{
//Play a click sound effect
SystemSoundID soundID;
NSString *sfxPath = [[NSBundle mainBundle]
pathForResource:@"aClick" ofType:@"caf"];
AudioServicesCreateSystemSoundID((CFURLRef)[NSURL fileURLWithPath:sfxPath],&soundID);
AudioServicesPlaySystemSound (soundID);
// Because someone may slam the scream button over and over,
//must stop current sound, then begin next
if ([self appSoundPlayer] != nil)
{
[[self appSoundPlayer] setDelegate:nil];
[[self appSoundPlayer] stop];
[self setAppSoundPlayer: nil];
}
//after selecting a random index in the array (did that in View Did Load),
//we move to the next scream on each click.
//First check...
//Are we past the end of the array?
if (currentScreamIndex == [screams count])
{
currentScreamIndex = 0;
}
//Get the string at the index in the personScreaming array
currentScream = [screams objectAtIndex: currentScreamIndex];
//Get the string at the index in the personScreaming array
NSString *screamer = [personScreaming objectAtIndex:currentScreamIndex];
//Log the string to the console
NSLog (@"playing scream: %@", screamer);
// Display the string in the personScreamingField field
NSString *listScreamer = [NSString stringWithFormat:@"scream by: %@", screamer];
[personScreamingField setText:listScreamer];
// Gets the file system path to the scream to play.
NSString *soundFilePath = [[NSBundle mainBundle] pathForResource: currentScream
ofType: @"caf"];
// Converts the sound's file path to an NSURL object
NSURL *newURL = [[NSURL alloc] initFileURLWithPath: soundFilePath];
self.soundFileURL = newURL;
[newURL release];
[[AVAudioSession sharedInstance] setDelegate: self];
[[AVAudioSession sharedInstance] setCategory: AVAudioSessionCategoryPlayback error: nil];
// Registers the audio route change listener callback function
AudioSessionAddPropertyListener (
kAudioSessionProperty_AudioRouteChange,
audioRouteChangeListenerCallback,
self
);
// Activates the audio session.
NSError *activationError = nil;
[[AVAudioSession sharedInstance] setActive: YES error: &activationError];
// Instantiates the AVAudioPlayer object, initializing it with the sound
AVAudioPlayer *newPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL: soundFileURL error: nil];
//Error check and continue
if (newPlayer != nil)
{
self.appSoundPlayer = newPlayer;
[newPlayer release];
[appSoundPlayer prepareToPlay];
[appSoundPlayer setVolume: 1.0];
[appSoundPlayer setDelegate:self];
//NEXT LINE IS FLAGGED BY INSTRUMENTS AS LEAKY
[appSoundPlayer play];
playing = YES;
//Get the string at the index in the photoArray array
NSString *screamerPic = [photoArray objectAtIndex:currentScreamIndex];
//Log the string to the console
NSLog (@"displaying photo: %@", screamerPic);
// Display the image of the person screaming
personScreamingImage.image = [UIImage imageNamed:screamerPic];
//show the share button
shareButton.hidden = NO;
mailStatusMessage.hidden = NO;
mailStatusMessage.text = @"share!";
//Get the string at the index in the funnySayings array
currentSayingsIndex = random() % [funnyButtonSayings count];
currentButtonSaying = [funnyButtonSayings objectAtIndex: currentSayingsIndex];
NSString *theSaying = [funnyButtonSayings objectAtIndex:currentSayingsIndex];
[funnyButtonSayingsLabel setText: theSaying];
currentScreamIndex++;
}
}
Here's my dealloc:
- (void)dealloc {
[appSoundPlayer stop];
[appSoundPlayer release], appSoundPlayer = nil;
[screamButton release], screamButton = nil;
[mailStatusMessage release], mailStatusMessage = nil;
[personScreamingField release], personScreamingField = nil;
[personScreamingImage release], personScreamingImage = nil;
[funnyButtonSayings release], funnyButtonSayings = nil;
[funnyButtonSayingsLabel release], funnyButtonSayingsLabel = nil;
[screams release], screams = nil;
[personScreaming release], personScreaming = nil;
[soundFileURL release];
[super dealloc];
}
@end
Thanks so much for reading this far! Any input appreciated.
