iPhone-如果我使用AVAudioRecorder录制，openAL将停止播放

Question

this is an iPhone-related question: I use openAL to play some sound (I have to manage gain, pitch, etc.). I want to record what I'm playing and I use AVAudioRecorder but when I "prepareToRecord" openAL stops to play audio. What's the problem? Here is the record IBAction I use:

- (IBAction) record: (id) sender
{
NSError *error;
    NSMutableDictionary *settings = [NSMutableDictionary dictionary];
    [settings setValue: [NSNumber numberWithInt:kAudioFormatLinearPCM] forKey:AVFormatIDKey];
    [settings setValue: [NSNumber numberWithFloat:8000.0] forKey:AVSampleRateKey];
    [settings setValue: [NSNumber numberWithInt: 1] forKey:AVNumberOfChannelsKey]; 
    [settings setValue: [NSNumber numberWithInt:16] forKey:AVLinearPCMBitDepthKey];
    [settings setValue: [NSNumber numberWithBool:NO] forKey:AVLinearPCMIsBigEndianKey];
    [settings setValue: [NSNumber numberWithBool:NO] forKey:AVLinearPCMIsFloatKey];
    NSURL *url = [NSURL fileURLWithPath:FILEPATH];
    self.recorder = [[AVAudioRecorder alloc] initWithURL:url settings:settings error:&error];
    self.recorder.delegate = self;
    self.recorder.meteringEnabled = YES;
    [self.recorder prepareToRecord];
    [self.recorder record];
}

Thanks

EDIT:

I tried with AudioQueue recording too. This time sounds stops after this code:

status = AudioQueueEnqueueBuffer(recordState.queue, recordState.buffers[i], 0, NULL);

So it's possible to record when iPhone is playing with openAL???

Thanks again

Answer 1

FILEPATH is same as path where another file is being played...? and if record and prepareToRecord are called from same place... actually you do not need to call prepareToRecord ... record will do the job... see

http://developer.apple.com/iphone/library/documentation/AVFoundation/Reference/AVAudioRecorder_ClassReference/Reference/Reference.html#//apple_ref/occ/instm/AVAudioRecorder/prepareToRecord