NSSpeechSynthesizer leaking

FROM : Casey Fleser
DATE : Tue Dec 20 20:10:21 2005

I just need a quick sanity check to make sure I'm not seeing 
something obvious here before I submit this to Radar. Looks to me 
that NSSpeechSynthesizer isn't cleaning up after itself properly.

Just a quick and simple action to that grabs some text from an 
NSTextField. I subclassed NSSpeechSynthesizer 
(DebugSpeechSynthesizer) so I could NSLog from retain, release, and 
dealloc. DebugSpeechSynthesizer is getting dealloc'd, but there are 
huge chunks of memory that are not being reclaimed (the main culprits 
seem to live in MacinTalk  AudioToolbox according to ObjectAlloc).

So anyway, am I missing something here? (for the record 
DebugSpeechSynthesizer does call [super dealloc]). Clicking the speak 
button repeatedly in my little sample app will consume hundreds of 
megabytes of memory pretty quickly.

- (IBAction) speak: (id) inSender
{
   NSSpeechSynthesizer        *synthesizer =
       [[DebugSpeechSynthesizer alloc] initWithVoice:
       [NSSpeechSynthesizer defaultVoice]];
   
   if (synthesizer != nil) {
       [synthesizer setDelegate: self];
       [synthesizer startSpeakingString: [_speechText stringValue]];
   }
}

- (void) speechSynthesizer: (NSSpeechSynthesizer *) inSender
   didFinishSpeaking: (BOOL) inFinishedSpeaking
{
   NSLog(@"NSSpeechSynthesizer %@ finished", inSender);
   
   [inSender release];
}

The demonstration app can be grabbed here if you like:

http://www.somegeekintn.com/download/SpeechTest.zip

Thanks for any insight,

Casey