#import "MyViewController.h"

#define kTransitionDuration 0.75

extern void DoAQOfflineRender(CFURLRef sourceURL, CFURLRef destinationURL);

@implementation MyViewController

@synthesize instructionsView, webView, contentView, startButton, activityIndicator, flipButton, doneButton;

- (void)dealloc

{

[flipButton release];

[doneButton release];

[destinationFilePath release];

CFRelease(sourceURL);

CFRelease(destinationURL);

[super dealloc];

}

- (void)viewDidLoad

{

// create the URLs we'll use for source and destination

NSString *source = [[NSBundle mainBundle] pathForResource:@"soundalac" ofType:@"caf"];

sourceURL = CFURLCreateWithFileSystemPath(kCFAllocatorDefault, (CFStringRef)source, kCFURLPOSIXPathStyle, false);

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

NSString *documentsDirectory = [paths objectAtIndex:0];

destinationFilePath = [[NSString alloc] initWithFormat: @"%@/output.caf", documentsDirectory];

destinationURL = CFURLCreateWithFileSystemPath(kCFAllocatorDefault, (CFStringRef)destinationFilePath, kCFURLPOSIXPathStyle, false);

// load up the info text

NSString *infoSouceFile = [[NSBundle mainBundle] pathForResource:@"info" ofType:@"html"];

NSString *infoText = [NSString stringWithContentsOfFile:infoSouceFile encoding:NSUTF8StringEncoding error:nil];

[self.webView loadHTMLString:infoText baseURL:nil];

// set up start button

UIImage *greenImage = [[UIImage imageNamed:@"green_button.png"] stretchableImageWithLeftCapWidth:12.0 topCapHeight:0.0];

UIImage *redImage = [[UIImage imageNamed:@"red_button.png"] stretchableImageWithLeftCapWidth:12.0 topCapHeight:0.0];

[startButton setBackgroundImage:greenImage forState:UIControlStateNormal];

[startButton setBackgroundImage:redImage forState:UIControlStateDisabled];

[startButton setEnabled:YES];

// add the subview

[self.view addSubview:contentView];

// add our custom flip buttons as the nav bars custom right view

UIButton* infoButton = [UIButton buttonWithType:UIButtonTypeInfoLight];

[infoButton addTarget:self action:@selector(flipAction:) forControlEvents:UIControlEventTouchUpInside];

flipButton = [[UIBarButtonItem alloc] initWithCustomView:infoButton];

self.navigationItem.rightBarButtonItem = flipButton;

// create our done button as the nav bar's custom right view for the flipped view (used later)

doneButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:self action:@selector(flipAction:)];

}

- (void)didReceiveMemoryWarning

{

// Invoke super's implementation to do the Right Thing, but also release the input controller since we can do that

// In practice this is unlikely to be used in this application, and it would be of little benefit,

// but the principle is the important thing.

//

[super didReceiveMemoryWarning];

}

#pragma mark- Actions

- (void)flipAction:(id)sender

{

[UIView setAnimationDelegate:self];

[UIView setAnimationDidStopSelector:@selector(animationDidStop:animationIDfinished:finished:context:)];

[UIView beginAnimations:nil context:nil];

[UIView setAnimationDuration:kTransitionDuration];

[UIView setAnimationTransition:([self.contentView superview] ? UIViewAnimationTransitionFlipFromLeft : UIViewAnimationTransitionFlipFromRight)

forView:self.view

cache:YES];

if ([self.instructionsView superview]) {

[self.instructionsView removeFromSuperview];

[self.view addSubview:contentView];

} else {

[self.contentView removeFromSuperview];

[self.view addSubview:instructionsView];

}

[UIView commitAnimations];

// adjust our done/info buttons accordingly

if ([instructionsView superview]) {

self.navigationItem.rightBarButtonItem = doneButton;

} else {

self.navigationItem.rightBarButtonItem = flipButton;

}

}

- (IBAction)doSomethingAction:(id)sender

{

[self.startButton setTitle:@"Rendering Audio..." forState:UIControlStateDisabled];

[startButton setEnabled:NO];

[self.activityIndicator startAnimating];

// run AQ code in a background thread

[self performSelectorInBackground:(@selector(renderAudio)) withObject:nil];

}

#pragma mark- AVAudioPlayer

- (void)audioPlayerDidFinishPlaying:(AVAudioPlayer *)player successfully:(BOOL)flag

{

if (flag == NO) NSLog(@"Playback finished unsuccessfully!");

[player setDelegate:nil];

[player release];

[startButton setEnabled:YES];

}

- (void)playAudio

{

// play the result

AVAudioPlayer *player = [[AVAudioPlayer alloc] initWithContentsOfURL:(NSURL *)destinationURL error:nil];

[player setDelegate:self];

[player play];

}

#pragma mark- AudioQueue

- (void)renderAudio

{

NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];

// delete the previous output file if it exists, not required but good for the test

if ([[NSFileManager defaultManager] fileExistsAtPath:destinationFilePath]) {

[[NSFileManager defaultManager] removeItemAtPath:destinationFilePath error:nil];

}

DoAQOfflineRender(sourceURL, destinationURL);

[self.activityIndicator stopAnimating];

[self.startButton setTitle:@"Playing Rendered Audio..." forState:UIControlStateDisabled];

[self performSelectorOnMainThread:(@selector(playAudio)) withObject:nil waitUntilDone:NO];

[pool release];

}