how do i store audio files in sqlite3 database and play them in iphone?

how do i store audio files in sqlite3 database and play them in iphone?

i want to store audio files(any of these formats mp3,wav,and iphone supported) in database and play them in iphone...any idea how to do this?

Can Adobe Air be the best solution for a Mac and iPhone application?


Cost of message dispatch in Objective-C
I don't know why you would want to store the audio files in a SQL database but sqlite3 supports BLOB.

Calling remote php functions from an iPhone app
So store them as BLOB and retrieve them..
Covert NSString to NSDate in a different timezone
Alternatively why not store references to the files that you want to play?.
Efficiency of create views programmatically vs IB

Round speedometer with Jquery / CSS in a browser

Am I using NSTimer correctly in iPhone View-based app?


Retrieve HTTPResponse/HTTPRequest status codes iPhone SDK?
In general it's best to not store binary files in any database.

You are better off writing that file to the disk as a file and then storing the path in the database..


It's not always best to store the file on disk.

Have a look at this comparison:. Here is how I do it using ruby and the sequel gem:. Create a table using this schema.

The file is a blob, the sha is the name of the file.

In this case, all my files are variable bit rate mono mp3 files, 2K-3K in size.

I have about 40 000 files in the db.

I'm using a sha1 value as file name since I have a lot of entries that have the same sound so I'm saving some space..
CREATE TABLE `sound` (`id` integer PRIMARY KEY AUTOINCREMENT, `sha` text, `file` blob); CREATE INDEX `sound_sha_index` ON `sound` (`sha`); 
Using ruby you can create the db like this:.
db = Sequel.sqlite('./sound.db')      db.create_table :sound do   primary_key :id, :index => true      column :sha, :text, :index => true   column :file, :blob  end 
Load the files into the database.

Assuming you have the files in a directory called 'sound', here is how:.
DB = Sequel.sqlite('./sound.db') files = Dir['./sound/*.mp3'] files.each_with_index do |f, i|   # progress   print "\r #{((i.to_f / files.size)*100).round(2)}%"   # get the file name without directory and extension   f =~ /\/sound\/(.+)\.mp3/   # insert into db   DB[:sound].insert :sha => $1, :file =>"#{f}").to_sequel_blob end 
Play sound in the iPhone app.

Copy the sound.db file to your iPhone project.

This is the code I'm using.

It's based on FMDB and AVAudioPlayer.. SoundPlayer.h.
#import <Foundation/Foundation.h> #import <AVFoundation/AVFoundation.h> #import "FMDatabase.h" #import "FMDatabaseQueue.h"  @interface SoundPlayer : NSObject {     FMDatabaseQueue *db; }  @property (nonatomic, retain) AVAudioPlayer *audioPlayer;  - (void)play:(NSString *)sha; - (void)free; @end 
#import "SoundPlayer.h" #import "DictAppDelegate.h"  @implementation SoundPlayer  - (SoundPlayer*)init {     NSString *dbPath = [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:@"sound.db"];     db = [FMDatabaseQueue databaseQueueWithPath: dbPath];      return self; }  - (void)play:(NSString *)sha {     [db inDatabase:^(FMDatabase *connection) {         // Execute and fetch result         NSString *query = [NSString stringWithFormat:@"select file from sound where sha = '%@' limit 1", sha];          FMResultSet *rs = [connection executeQuery:query];          while([rs next]) {              NSData *file = [rs dataForColumn: @"file"];              NSError *error;              self.audioPlayer = [[AVAudioPlayer alloc] initWithData: file error:&error];             self.audioPlayer.numberOfLoops = 0;             self.audioPlayer.volume = 1.0f;             [self.audioPlayer prepareToPlay];              if (self.audioPlayer == nil) {                 NSLog(@"Error playing sound: %@", [error description]);             } else {                 [self.audioPlayer play];             }         }     }]; }  // Cleanup - (void)free {     [db close]; }  @end 
Use the file from somewhere in your code like this:.
self.soundPlayer = [[SoundPlayer alloc] init]; [self.soundPlayer play:[entry valueForKey:@"sha"]]; 
where [entry valueForKey:@"sha"]] returns a NSString which is the file name I have stored in my other table of entries..

85 out of 100 based on 85 user ratings 835 reviews