-(void)appendToPool:(NSString *)packetID
         packetBody:(const void*)packetBody
        numberBytes:(UInt32)numberBytes
       packetNumber:(UInt32)packetNumber
{
    AudioItem * item = [audioPool.pool objectForKey:packetID];
    if (!item)
    {
        NSLog(@"we are creating a new item, not fetching it");
        item = [audioPool createItemAndAddToPool:packetID];
    }

    [item.data dataWithBytes:packetBody];

    if (currentSong && ![currentSong isEqual:packetID]) {
        NSLog(@"ooh! song has changed, current song is %@ and packetId is %@", currentSong, packetID);
        isSongChanged = true;
        currentSong = packetID;
        return;
    }


    pthread_mutex_lock(&queueBuffersMutex);

    currentSong = packetID;
    NSLog(@"we have just assigned current song and it is %@",currentSong);

    pthread_cond_signal(&queueBufferReadyCondition);
    pthread_mutex_unlock(&queueBuffersMutex);

}

-(void)startReader
{
    // initialize a mutex and condition so that we can block on buffers in use.
    pthread_mutex_init(&queueBuffersMutex, NULL);
    pthread_cond_init(&queueBufferReadyCondition, NULL);

    pthread_mutex_lock(&queueBuffersMutex);
    while (!currentSong) {
        //wait
        pthread_cond_wait(&queueBufferReadyCondition, &queueBuffersMutex);
        NSLog(@"we are currently waiting for current songto show up");
    }
    pthread_mutex_unlock(&queueBuffersMutex);

    @synchronized(self)
    {
        NSLog(@"we're done waiting! now we wil read item withcurrent song %@", currentSong);
        AudioItem * item = [audioPool.pool objectForKey:currentSong];

        NSLog(@"we have fetched item");
        if (!item)
        {
            NSLog(@"cannot find song in container");
            return;
        }

        while ([item.data length] > 0) {
            NSLog(@"we are looping as long as there is length in item.data");
            [self doRead:item];
            if (isSongChanged) {
                NSLog(@"song has changed! time to change item");
                item = [audioPool.pool objectForKey:currentSong];
            }
        }
    }

}

ooh! song has changed, current song is (
kCFRunLoopCommonModes
) and packetId is ax Rialtz ndant