Using OpenCV in iPhone SDK

A Good post for using OpenCV in iPhone SDK
http://niw.at/articles/2009/03/14/using-opencv-on-iphone/en

Upload Song from iPod Library to Webserver using ASIHTTPRequest

1. in Your .h file

     #import

    and use include MPMediaPickerControllerDelegate

2. in .m file where your brows button

     MPMediaPickerController *picker =[[MPMediaPickerController alloc] initWithMediaTypes: MPMediaTypeAnyAudio];

picker.delegate = self;

        picker.allowsPickingMultipleItems = YES;

[[UIApplication sharedApplication] setStatusBarStyle: UIStatusBarStyleBlackOpaque animated:YES];

      [self presentModalViewController:picker animated:YES];

        [picker release];

3.  #pragma mark -

#pragma mark Media Picker Delegate Methods

- (void) mediaPicker: (MPMediaPickerController *) mediaPicker didPickMediaItems: (MPMediaItemCollection *) theCollection {   

NSArray *ArrItems=theCollection.items;

MPMediaItem *curItem = [ArrItems objectAtIndex:0]; 

NSString *SongName=[curItem valueForProperty:MPMediaItemPropertyTitle];

NSURL *assetURL = [curItem valueForProperty:MPMediaItemPropertyAssetURL];

AVURLAsset *songAsset = [AVURLAsset URLAssetWithURL:assetURL options:nil];

AVAssetExportSession *exportSession = [[AVAssetExportSession alloc]

                                           initWithAsset:songAsset

                                           presetName:AVAssetExportPresetPassthrough];

NSArray *tracks = [songAsset tracksWithMediaType:AVMediaTypeAudio];

AVAssetTrack *track = [tracks objectAtIndex:0];

id desc = [track.formatDescriptions objectAtIndex:0];

const AudioStreamBasicDescription *audioDesc = CMAudioFormatDescriptionGetStreamBasicDescription((CMAudioFormatDescriptionRef)desc);

    FourCharCode formatID = audioDesc->mFormatID;

NSString *fileType = nil;

NSString *ex = nil;

switch (formatID) {

            

        case kAudioFormatLinearPCM:

        {

            UInt32 flags = audioDesc->mFormatFlags;

            if (flags & kAudioFormatFlagIsBigEndian) {

                fileType = @"public.aiff-audio";

                ex = @"aif";

            } else {

                fileType = @"com.microsoft.waveform-audio";

                ex = @"wav";

            }

        }

            break;

            

        case kAudioFormatMPEGLayer3:

            fileType = @"com.apple.quicktime-movie";

            ex = @"mp3";

break;

            

        case kAudioFormatMPEG4AAC:

            fileType = @"com.apple.m4a-audio";

            ex = @"m4a";

            break;

            

        case kAudioFormatAppleLossless:

            fileType = @"com.apple.m4a-audio";

            ex = @"m4a";

            break;

            

        default:

            break;

    }

exportSession.outputFileType = fileType;

NSString *exportFile = [[self myDocumentsDirectory] stringByAppendingPathComponent:           

[NSString stringWithFormat:@"%@.%@",SongName,ex]];

NSURL *exportURL = [[NSURL fileURLWithPath:exportFile] retain];

exportSession.outputURL = exportURL; 

// do the export

// (completion handler block omitted) 

[exportSession exportAsynchronouslyWithCompletionHandler:

^{

NSData *Songdata = [NSData dataWithContentsOfFile: [[self myDocumentsDirectory] 

stringByAppendingPathComponent: [NSString stringWithFormat:@"%@.%@",SongName,ex]]];

 

ASIFormDataRequest *request = [ASIFormDataRequest requestWithURL:[NSURL URLWithString:uploadSong]];

[request setDelegate:self];

NSString *UserID = [[NSUserDefaults standardUserDefaults]objectForKey:@"USERID"];

 

[request setPostValue:@"23" forKey:@"user_id"];

[request setPostValue:@"1" forKey:@"category_id"];

[request addData:Songdata withFileName:SongName andContentType:ex forKey:@"upload_song"];

[request startAsynchronous];

 

}];

[self dismissModalViewControllerAnimated: YES];

}

-(NSString *)myDocumentsDirectory

{

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);

NSString *documentsDirectory = [paths objectAtIndex:0];

return documentsDirectory;

}

4.

#pragma mark 

#pragma mark ASIHTTPRequestDelegate Methods

- (void)requestFinished:(ASIHTTPRequest *)request 

{

NSString *receivedString = [request responseString];

NSLog(@"%@",receivedString);

}

- (void)requestFailed:(ASIHTTPRequest *)request

{

NSString *receivedString = [request responseString];

NSLog(@"%@",receivedString);

}

- (void)request:(ASIHTTPRequest *)request didReceiveData:(NSData *)data

{

NSString* str = [[NSString alloc]initWithData:data encoding:NSUTF8StringEncoding];

NSLog(@"%@",str);

}