mediapickerから曲を取得してアプリケーションに保存するアプリケーションを実行しています。ファイルのサイズを縮小したいのですが、「AACConverter」という名前のサンプルを取得しました。アプリケーションをテストしましたが、ファイルサイズが縮小されていません。誰かがこの問題を解決するのを手伝ってくれます。
- (IBAction)convert:(id)sender {
if ( ![TPAACAudioConverter AACConverterAvailable] ) {
[[[[UIAlertView alloc] initWithTitle:NSLocalizedString(@"Converting audio", @"")
message:NSLocalizedString(@"Couldn't convert audio: Not supported on this device", @"")
delegate:nil
cancelButtonTitle:nil
otherButtonTitles:NSLocalizedString(@"OK", @""), nil] autorelease] show];
return;
}
// Initialise audio session, and register an interruption listener, important for AAC conversion
if ( !checkResult(AudioSessionInitialize(NULL, NULL, interruptionListener, self), "initialise audio session") ) {
[[[[UIAlertView alloc] initWithTitle:NSLocalizedString(@"Converting audio", @"")
message:NSLocalizedString(@"Couldn't initialise audio session!", @"")
delegate:nil
cancelButtonTitle:nil
otherButtonTitles:NSLocalizedString(@"OK", @""), nil] autorelease] show];
return;
}
// Set up an audio session compatible with AAC conversion. Note that AAC conversion is incompatible with any session that provides mixing with other device audio.
UInt32 audioCategory = kAudioSessionCategory_MediaPlayback;
if ( !checkResult(AudioSessionSetProperty(kAudioSessionProperty_AudioCategory, sizeof(audioCategory), &audioCategory), "setup session category") ) {
[[[[UIAlertView alloc] initWithTitle:NSLocalizedString(@"Converting audio", @"")
message:NSLocalizedString(@"Couldn't setup audio category!", @"")
delegate:nil
cancelButtonTitle:nil
otherButtonTitles:NSLocalizedString(@"OK", @""), nil] autorelease] show];
return;
}
NSArray *documentsFolders = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
audioConverter = [[[TPAACAudioConverter alloc] initWithDelegate:self
source:[[NSBundle mainBundle] pathForResource:@"audio" ofType:@"mp3"]
destination:[[documentsFolders objectAtIndex:0] stringByAppendingPathComponent:@"audio.m4a"]] autorelease];
NSLog(@"destinatiion path is %@",[[documentsFolders objectAtIndex:0]stringByAppendingFormat:@"audio.m4a"]);
((UIButton*)sender).enabled = NO;
[self.spinner startAnimating];
self.progressView.progress = 0.0;
self.progressView.hidden = NO;
[audioConverter start];
}
- (IBAction)playConverted:(id)sender {
if ( audioPlayer ) {
[audioPlayer stop];
[audioPlayer release];
audioPlayer = nil;
[(UIButton*)sender setTitle:@"Play converted" forState:UIControlStateNormal];
} else {
NSArray *documentsFolders = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *path = [[documentsFolders objectAtIndex:0] stringByAppendingPathComponent:@"audio.m4a"];
audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:path] error:NULL];
[audioPlayer play];
[(UIButton*)sender setTitle:@"Stop" forState:UIControlStateNormal];
}
}
- (IBAction)emailConverted:(id)sender {
NSArray *documentsFolders = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *path = [[documentsFolders objectAtIndex:0] stringByAppendingPathComponent:@"audio.m4a"];
MFMailComposeViewController *mailController = [[MFMailComposeViewController alloc] init];
mailController.mailComposeDelegate = self;
[mailController setSubject:NSLocalizedString(@"Recording", @"")];
[mailController addAttachmentData:[NSData dataWithContentsOfMappedFile:path]
mimeType:@"audio/mp4a-latm"
fileName:[path lastPathComponent]];
[self presentModalViewController:mailController animated:YES];
}
#pragma mark - Audio converter delegate
-(void)AACAudioConverter:(TPAACAudioConverter *)converter didMakeProgress:(CGFloat)progress {
self.progressView.progress = progress;
}
-(void)AACAudioConverterDidFinishConversion:(TPAACAudioConverter *)converter {
self.progressView.hidden = YES;
[self.spinner stopAnimating];
self.convertButton.enabled = YES;
self.playConvertedButton.enabled = YES;
self.emailConvertedButton.enabled = YES;
audioConverter = nil;
}
-(void)AACAudioConverter:(TPAACAudioConverter *)converter didFailWithError:(NSError *)error {
[[[[UIAlertView alloc] initWithTitle:NSLocalizedString(@"Converting audio", @"")
message:[NSString stringWithFormat:NSLocalizedString(@"Couldn't convert audio: %@", @""), [error localizedDescription]]
delegate:nil
cancelButtonTitle:nil
otherButtonTitles:NSLocalizedString(@"OK", @""), nil] autorelease] show];
self.convertButton.enabled = YES;
audioConverter = nil;
}