iOS 5 - AVAPlayer not working anymore - ios

Question

I've a bit of code which was working fine with iOS 4.3. I had a look on the Internet, I found others having the same problem without answer which worked for me. I think that I can record something but I cannot play it. Here is my code:
DetailViewController.h
#import <UIKit/UIKit.h>
#import <AVFoundation/AVFoundation.h>
#import <CoreAudio/CoreAudioTypes.h>
#import <AudioToolbox/AudioServices.h>
#interface DetailViewController : UIViewController <UISplitViewControllerDelegate, AVAudioRecorderDelegate> {
id detailItem;
UILabel *detailDescriptionLabel;
IBOutlet UIButton *btnStart;
IBOutlet UIButton *btnPlay;
//Variables setup for access in the class:
NSURL * recordedTmpFile;
AVAudioRecorder * recorder;
BOOL toggle;
}
// Needed properties
#property (nonatomic, retain) IBOutlet UIButton *btnStart;
#property (nonatomic, retain) IBOutlet UIButton *btnPlay;
#property (strong, nonatomic) id detailItem;
#property (strong, nonatomic) IBOutlet UILabel *detailDescriptionLabel;
-(IBAction) start_button_pressed;
-(IBAction) play_button_pressed;
#end
DetailViewController.m
- (void)viewDidLoad {
[super viewDidLoad];
toggle = YES;
btnPlay.hidden = YES;
NSError *error;
// Create the Audio Session
AVAudioSession *audioSession = [AVAudioSession sharedInstance];
// Set up the type of session
[audioSession setCategory:AVAudioSessionCategoryPlayAndRecord error:&error];
// Activate the session.
[audioSession setActive:YES error:&error];
[self configureView];
}
-(IBAction) start_button_pressed{
if (toggle) {
toggle = NO;
[btnStart setTitle:#"Press to stop recording" forState:UIControlStateNormal];
btnPlay.enabled = toggle;
btnPlay.hidden = !toggle;
NSError *error;
NSMutableDictionary *recordSettings = [[NSMutableDictionary alloc] init];
[recordSettings setValue:[NSNumber numberWithInt:kAudioFormatAppleIMA4] forKey:AVFormatIDKey];
[recordSettings setValue:[NSNumber numberWithFloat:44100.0] forKey:AVSampleRateKey];
[recordSettings setValue:[NSNumber numberWithInt:2] forKey:AVNumberOfChannelsKey];
// Create a temporary files to save the recording.
recordedTmpFile = [NSURL fileURLWithPath:[NSTemporaryDirectory() stringByAppendingPathComponent:[NSString stringWithFormat: #"%.0f.%#", [NSDate timeIntervalSinceReferenceDate] * 1000.0, #"caf"]]];
NSLog(#"The temporary file used is: %#", recordedTmpFile);
recorder = [[AVAudioRecorder alloc] initWithURL:recordedTmpFile settings:recordSettings error:&error];
[recorder setDelegate:self];
[recorder prepareToRecord];
[recorder record];
}
else {
toggle = YES;
[btnStart setTitle:#"Start recording" forState:UIControlStateNormal];
btnPlay.hidden = !toggle;
btnPlay.enabled = toggle;
NSLog(#"Recording stopped and saved in file: %#", recordedTmpFile);
[recorder stop];
}
}
-(IBAction) play_button_pressed{
NSError *error;
AVAudioPlayer * avPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:recordedTmpFile error:&error];
if (!error)
{
[avPlayer prepareToPlay];
[avPlayer play];
NSLog(#"File is playing");
}
}
- (void) audioPlayerDidFinishPlaying: (AVAudioPlayer *) player
successfully: (BOOL) flag {
NSLog (#"audioPlayerDidFinishPlaying:successfully:");
}
- (void)audioRecorderDidFinishRecording:(AVAudioRecorder *) aRecorder successfully: (BOOL)flag
{
NSLog (#"audioRecorderDidFinishRecording:successfully:");
}
Here is the of my program running:
2011-11-25 11:58:02.005 Bluetooth1[897:707] The temporary file used is: file://localhost/private/var/mobile/Applications/D81023F8-C53D-4AC4-B1F7-14D66EB4844A/tmp/343915082005.caf
2011-11-25 11:58:05.956 Bluetooth1[897:707] Recording stopped and saved in file: file://localhost/private/var/mobile/Applications/D81023F8-C53D-4AC4-B1F7-14D66EB4844A/tmp/343915082005.caf
2011-11-25 11:58:05.998 Bluetooth1[897:707] audioRecorderDidFinishRecording:successfully:
2011-11-25 11:58:11.785 Bluetooth1[897:707] File is playing
For some reason, the function audioPlayerDidFinishPlaying is never called. However it seems that something has been recorded. Right now I do not know which part is not working but I guess this has something to do with AVAudioPlayer.
[EDIT] It's getting weirder and weirder. I wanted to make sure that something was recorded so I look for taking the duration of the record. Here is the new play function:
-(IBAction) play_button_pressed{
NSError *error;
AVAudioPlayer * avPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL: recordedTmpFile error:&error];
if (!error)
{
AVURLAsset* audioAsset = [AVURLAsset URLAssetWithURL:recordedTmpFile options:nil];
CMTime audioDuration = audioAsset.duration;
float audioDurationSeconds = CMTimeGetSeconds(audioDuration);
[avPlayer prepareToPlay];
[avPlayer play];
NSString *something = [NSString stringWithFormat:#"%f",audioDurationSeconds];
NSLog(#"File is playing: %#", something);
}
else
{
NSLog(#"Error playing.");
}
}
Now, the length of the record is recorded and it make sense (if I record for 10s it shows something around 10s). However, when I put these lines of code for the first time I forgot to do the conversion float to NSString. So it crashed... and the app play the sound... After different tests I can conclude that my app can record and play a sound but is as to crash to play the recorded sound. I've no idea what can be the problem. I found that AVPlayer is asynchronous, is their something to do with that? I'm completely lost...

Answer 1

Replace the urlpath with the following code:
NSString *documentsDirectory = [NSSearchPathForDirectoriesInDomains(
NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
NSString *filepath = [documentsDirectory stringByAppendingPathComponent:#"urfile.xxx"];
NSURL *url = [NSURL fileURLWithPath:filepath];

Answer 2

Try the solution here:
Recording and playback

Answer 3

OK, that is not really cool to answer you own questions. Moreover when the answer is not clean but it is working... In order to play what I have recorded I have used the following block of code:
AVURLAsset* audioAsset = [AVURLAsset URLAssetWithURL:recordedTmpFile options:nil];
CMTime audioDuration = audioAsset.duration;
float audioDurationSeconds = CMTimeGetSeconds(audioDuration);
[avPlayer prepareToPlay];
[avPlayer play];
// Block for audioDurationSeconds seconds
[NSThread sleepForTimeInterval:audioDurationSeconds];
I am calculating the length of the recorded file and I am waiting for this amount of time... it is dirty but it is doing the trick. Plus, if it launched in another thread it will not block the application.
I anyone has something I would gladly take it!