I am Working with streaming URL and I need to create a UISlider(control volume) and an indicator(buffering/loading) like one in the above image.
Code I am using is
_theAudio=[[AVPlayer alloc] initWithURL:streamURL];
[[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryPlayback error:nil];
[[AVAudioSession sharedInstance] setActive: YES error: nil];
[[UIApplication sharedApplication] beginReceivingRemoteControlEvents];
[_theAudio play];
refer this Link
or
- (void)updateSlider {
// Updates the slider about the music time
slider.value = player.currentTime;
}
- (IBAction)sliderChanged : (UISlider *)sender {
// Fast skips the music when user scrolls the UISlider
[player stop];
[player setCurrentTime:slider.value];
[player prepareToPlay];
[player play];
}
// Stops the timer when the music is finished
- (void)audioPlayerDidFinishPlaying : (AVAudioPlayer *)player successfully : (BOOL)flag {
// Music completed
if (flag) {
[sliderTimer invalidate];
}
}
for volume control u can add below line in
sliderValue_changed delegate
[audioPlayer setVolume:slider.value];
but first set min slider value to 0 and max to 1.
Related
Im making a radio streaming application, my app is working perfectly. I have two buttons in my screen one for playing and the other for pausing, also I have a label that indicates the state of my player. I have no problem making this label show the state "Playing" or "Paused" my problem is that when I press the play button there is a time where the buffer is gathering information and I can't figure out a way to show a "Buffering..." label before the player start to stream the audio.
This is the code Im using for streaming the radio station.
NSString *url = [NSString stringWithFormat:#"http://66.7.218:8816"];
player = [[MPMoviePlayerController alloc] initWithContentURL:[NSURL URLWithString:url]];
player.movieSourceType = MPMovieSourceTypeStreaming;
player.view.hidden = YES;
[[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryPlayback error:nil];
[[AVAudioSession sharedInstance]setActive:YES error:nil];
[[UIApplication sharedApplication] beginReceivingRemoteControlEvents];
[player prepareToPlay];
[player play];
Im usin a function I created called changeStatus and this function is called each second to identify the status of the player.
-(void)changeStatus
{
if (player.loadState == MPMovieLoadStateUnknown) {
status.text = #"Buffering...";
}
if(player.playbackState == MPMoviePlaybackStatePlaying)
{
status.text = #"Playing.";
}
if(player.playbackState == MPMoviePlaybackStatePaused)
{
status.text = #"Paused";
}
}
I really need to solve this problem and Ive tried all I can to solve it. Hope you can help me! Thanks in advance.
I achieved to solve the problem. The part that was missing is the if clause which gives the signal to start playing only when the player is prepared to play. Without that the player starts to play before the buffer is completely loaded so it plays no audio. And that was the reason my Playing label showed immediately instead of the buffering one.
NSString *url = [NSString stringWithFormat:#"http://66.7.218:8816"];
player = [[MPMoviePlayerController alloc] initWithContentURL:[NSURL URLWithString:url]];
player.movieSourceType = MPMovieSourceTypeStreaming;
player.view.hidden = YES;
[[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryPlayback error:nil];
[[AVAudioSession sharedInstance]setActive:YES error:nil];
[[UIApplication sharedApplication] beginReceivingRemoteControlEvents];
[player prepareToPlay];
if(player.isPreparedToPlay)
{
[player play];
}
Adittionally, the MPMoviePlaybackStateInterrupted refers to the buffering process while doing an stream. So if you want to make something happens in the buffering process refer to this method.
-(void)changeStatus
{
if(player.playbackState == MPMoviePlaybackStatePlaying)
{
status.text = #"Playing.";
}
if(player.playbackState == MPMoviePlaybackStateInterrupted)
{
status.text = #"Buffering...";
}
}
Thanks a lot to the user That Guy who helped me solving this.
Actually there's a notification called
MPMediaPlaybackIsPreparedToPlayDidChangeNotification
The observer will get notified after it is ready to play. It is more or less the same effect but with different mechanism.
I am playing music using AVAudioPlayer in background. The problem is: if there is a incoming calling interrupts the player, it will never resume unless switch to foreground and do it manually.
The code is simple, to play it in background:
[[AVAudioSession sharedInstance] setCategory: AVAudioSessionCategoryPlayAndRecord error: nil];
[[AVAudioSession sharedInstance] setActive: YES error: nil];
url = [[NSURL alloc] initFileURLWithPath:...];
audio_player = [[AVAudioPlayer alloc] initWithContentsOfURL: url error:NULL];
audio_player.delegate = self;
bool ret = [audio_player play];
delegate to handle interruptions:
-(void)audioPlayerBeginInterruption:(AVAudioPlayer *)player
{
//tried this, not working [[AVAudioSession sharedInstance] setActive: NO error: nil];
NSLog(#"-- interrupted --");
}
//----------- THIS PART NOT WORKING WHEN RUNNING IN BACKGROUND ----------
- (void)audioPlayerEndInterruption:(AVAudioPlayer *)player
{
NSLog(#"resume!");
//--- tried, not working: [[AVAudioSession sharedInstance] setCategory: AVAudioSessionCategoryPlayAndRecord error: nil];
//--- tried, not working: [[AVAudioSession sharedInstance] setActive: YES error: nil];
//--- tried, not working: [audio_player prepareToPlay];
[audio_player play];
}
Can any one help me?
Found the solution!
I had the same problem, my app was resuming the audio nicely after an interruption, only if my app was open. When it was on the background it failed ro resume playing the audio after an interruption.
I fixed this by adding the following lines of code:
Add this line whenever your app start playing audio.[[UIApplication sharedApplication] beginReceivingRemoteControlEvents];
And on the endInterruption method, wait 1 or 2 seconds before resume playing the audio. This to allow the OS to stop using the audio channel.
- (void)endInterruptionWithFlags:(NSUInteger)flags {
// Validate if there are flags available.
if (flags) {
// Validate if the audio session is active and immediately ready to be used.
if (AVAudioSessionInterruptionFlags_ShouldResume) {
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, 1), dispatch_get_main_queue(), ^{
// Resume playing the audio.
});
}
}
}
You can also add this line when your app stops (not pause) playing audio. But is not required.
[[UIApplication sharedApplication] beginReceivingRemoteControlEvents];
Try this
-(void)audioPlayerEndInterruption:(AVAudioPlayer *)audioPlayer withFlags:(NSUInteger)flags{
if (flags == AVAudioSessionFlags_ResumePlay) {
[audioPlayer play];
}
Hope it helps.
Ok right RecordViewController, allows you to use the voice function and record. It functions properly, but When i press the 'back' button and go to a different view the recording stops. How do I make it so it keeps recording, so the user can record their voice even whilst on different views?
#implementation RecordViewController
#synthesize actSpinner, btnStart, btnPlay;
-(void)countUp {
mainInt += 1;
seconds.text = [NSString stringWithFormat:#"%02d", mainInt];
}
-(IBAction)goBack:(id)sender; {
[self dismissModalViewControllerAnimated:YES];
}
/*
// The designated initializer. Override to perform setup that is required before the view is loaded.
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil {
if (self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]) {
// Custom initialization
}
return self;
}
*/
/*
// Implement loadView to create a view hierarchy programmatically, without using a nib.
- (void)loadView {
}
*/
// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
- (void)viewDidLoad {
[super viewDidLoad];
//Start the toggle in true mode.
toggle = YES;
btnPlay.hidden = YES;
//Instanciate an instance of the AVAudioSession object.
AVAudioSession * audioSession = [AVAudioSession sharedInstance];
//Setup the audioSession for playback and record.
//We could just use record and then switch it to playback leter, but
//since we are going to do both lets set it up once.
[audioSession setCategory:AVAudioSessionCategoryPlayAndRecord error: &error];
//Activate the session
[audioSession setActive:YES error: &error];
}
/*
// Override to allow orientations other than the default portrait orientation.
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
// Return YES for supported orientations
return (interfaceOrientation == UIInterfaceOrientationPortrait);
}
*/
- (IBAction) start_button_pressed{
if(toggle)
{
toggle = NO;
[actSpinner startAnimating];
[btnStart setImage:[UIImage imageNamed:#"stoprecordingbutton.png"] forState:UIControlStateNormal];
mainInt = 0;
theTimer = [NSTimer scheduledTimerWithTimeInterval:1.0 target:self selector:#selector(countUp) userInfo:nil repeats:YES];
btnPlay.enabled = toggle;
btnPlay.hidden = !toggle;
//Begin the recording session.
//Error handling removed. Please add to your own code.
//Setup the dictionary object with all the recording settings that this
//Recording sessoin will use
//Its not clear to me which of these are required and which are the bare minimum.
//This is a good resource: http://www.totodotnet.net/tag/avaudiorecorder/
NSMutableDictionary* recordSetting = [[NSMutableDictionary alloc] init];
[recordSetting setValue :[NSNumber numberWithInt:kAudioFormatAppleIMA4] forKey:AVFormatIDKey];
[recordSetting setValue:[NSNumber numberWithFloat:44100.0] forKey:AVSampleRateKey];
[recordSetting setValue:[NSNumber numberWithInt: 2] forKey:AVNumberOfChannelsKey];
//Now that we have our settings we are going to instanciate an instance of our recorder instance.
//Generate a temp file for use by the recording.
//This sample was one I found online and seems to be a good choice for making a tmp file that
//will not overwrite an existing one.
//I know this is a mess of collapsed things into 1 call. I can break it out if need be.
recordedTmpFile = [NSURL fileURLWithPath:[NSTemporaryDirectory() stringByAppendingPathComponent: [NSString stringWithFormat: #"%.0f.%#", [NSDate timeIntervalSinceReferenceDate] * 1000.0, #"caf"]]];
NSLog(#"Using File called: %#",recordedTmpFile);
//Setup the recorder to use this file and record to it.
recorder = [[ AVAudioRecorder alloc] initWithURL:recordedTmpFile settings:recordSetting error:&error];
//Use the recorder to start the recording.
//Im not sure why we set the delegate to self yet.
//Found this in antother example, but Im fuzzy on this still.
[recorder setDelegate:self];
//We call this to start the recording process and initialize
//the subsstems so that when we actually say "record" it starts right away.
[recorder prepareToRecord];
//Start the actual Recording
[recorder record];
//There is an optional method for doing the recording for a limited time see
//[recorder recordForDuration:(NSTimeInterval) 10]
}
else
{
toggle = YES;
[actSpinner stopAnimating];
[btnStart setImage:[UIImage imageNamed:#"recordbutton.png"] forState:UIControlStateNormal];
btnPlay.enabled = toggle;
btnPlay.hidden = !toggle;
[theTimer invalidate];
NSLog(#"Using File called: %#",recordedTmpFile);
//Stop the recorder.
[recorder stop];
}
}
- (void)didReceiveMemoryWarning {
// Releases the view if it doesn't have a superview.
[super didReceiveMemoryWarning];
// Release any cached data, images, etc that aren't in use.
}
-(IBAction) play_button_pressed{
//The play button was pressed...
//Setup the AVAudioPlayer to play the file that we just recorded.
AVAudioPlayer * avPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:recordedTmpFile error:&error];
[avPlayer prepareToPlay];
[avPlayer play];
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
// Return YES for supported orientations
return (interfaceOrientation == UIInterfaceOrientationLandscapeLeft || interfaceOrientation == UIInterfaceOrientationLandscapeRight);
}
- (void)viewDidUnload {
// Release any retained subviews of the main view.
// e.g. self.myOutlet = nil;
//Clean up the temp file.
NSFileManager * fm = [NSFileManager defaultManager];
[fm removeItemAtPath:[recordedTmpFile path] error:&error];
//Call the dealloc on the remaining objects.
[recorder dealloc];
recorder = nil;
recordedTmpFile = nil;
}
- (void)dealloc {
[super dealloc];
}
#end
Thanks
Keep a reference to it somewhere in the app (like in the delegate) so it won't get de-allocated.
I would set up the view controller using a singleton approach. I like it better then using the appDelegate and apple recomends it over editting it.
Have a look here for some examples
I use this approach when I want ininterrupt music playing on my apps and works like a charm... be aware of memory usage though as those instances are never released as your app is running...
I'd like to control an instance of AVAudioPlayer from a UITableView item in a didSelectRowAtIndexPath instance.
First touch of the row item triggers 'play' of the AVAudioPlayer. Second touch of the row item triggers 'stop' of the AVAudioPlayer.
I can make the 'play' work but can't get the 'stop' to work. Also, subsequent touches of the row item starts another thread of the audio in the background.
What's the best way to ensure 1 tap starts the audio and a 2nd tap stops it?
Code samples - this method preps audio file and AVAudioPlayer for use:
- (void)makeReadyAudio {
NSString *path = [[NSBundle mainBundle] pathForResource:#"Murderers" ofType:#"mp3"];
NSURL *url = [NSURL fileURLWithPath:path];
NSError *error;
musicPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:&error];
[musicPlayer prepareToPlay];
}
This block will start & stop the AVAudioPlayer within a case statement in the didSelectRowAtIndexPath section:
case 7: {
//touch to start audio sound playing, touch again to stop playing
[self makeReadyAudio];
if ([musicPlayer isPlaying]) {
[musicPlayer stop];
NSLog(#"musicPlayer tested to be playing, so stop it.");
} else {
[musicPlayer play];
NSLog(#"musicPlayer tested to be *not* playing, so play it.");
}
break;
}
How about:
- (void) didSelectRowAtIndexPath:
{
if (player.isPlaying) {
[player stop];
} else {
[player start];
}
}
In other words, keep the player around and see what it is doing.
The problem is that you call makeReadyAudio every single time the row is tapped. You need to check if you have already done that. For example by doing something like:
if (musicPlayer == nil) {
[self makeReadyAudio];
}
How can I play a background audio while my application is running?
Thanks.
Okay. This is a solution for background sound on iOS4 & iOS5 (definitely works up to iOS 5.0.1), and I have tested it only with AVPlayer. It should probably work for MPMusicPlayerController too.
Required frameworks:
AVFoundation.framework
AudioToolbox.framework
In your Info.plist, for the key UIBackgroundModes, add audio.
In MyAppDelegate.h:
reference <AVFoundation/AVFoundation.h> & <AudioToolbox/AudioToolbox.h>
implement the protocol AVAudioSessionDelegate:
#interface MyAppDelegate : NSObject <UIApplicationDelegate, AVAudioSessionDelegate>
define a method ensureAudio:
// Ensures the audio routes are setup correctly
- (BOOL) ensureAudio;
In MyAppDelegate.m:
implement the ensureAudio method:
- (BOOL) ensureAudio
{
// Registers this class as the delegate of the audio session (to get background sound)
[[AVAudioSession sharedInstance] setDelegate: self];
// Set category
NSError *categoryError = nil;
if (![[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryPlayback error:&categoryError]) {
NSLog(#"Audio session category could not be set");
return NO;
}
// Activate session
NSError *activationError = nil;
if (![[AVAudioSession sharedInstance] setActive: YES error: &activationError]) {
NSLog(#"Audio session could not be activated");
return NO;
}
// Allow the audio to mix with other apps (necessary for background sound)
UInt32 doChangeDefaultRoute = 1;
AudioSessionSetProperty(kAudioSessionProperty_OverrideCategoryMixWithOthers, sizeof(doChangeDefaultRoute), &doChangeDefaultRoute);
return YES;
}
in the application:didFinishLaunchingWithOptions: method, before you assign the root view controller, run [self ensureAudio]:
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
// Configure audio session
[self ensureAudio];
// Add the navigation controller's view to the window and display.
self.window.rootViewController = self.navigationController;
[self.window makeKeyAndVisible];
return YES;
}
implement the AVAudioSessionDelegate methods like this:
#pragma mark - AVAudioSessionDelegate
- (void) beginInterruption
{
}
- (void) endInterruption
{
// Sometimes the audio session will be reset/stopped by an interruption
[self ensureAudio];
}
- (void) inputIsAvailableChanged:(BOOL)isInputAvailable
{
}
ensure that your app continues to run in the background. You can use the ol' [[UIApplication sharedApplication] beginBackgroundTaskWithExpirationHandler] if you want, but I think there are better ways.
play the actual audio (note I'm using ARC, that's why there are no release calls):
NSURL * file = [[NSBundle mainBundle] URLForResource:#"beep" withExtension:#"aif"];
AVURLAsset * asset = [[AVURLAsset alloc] initWithURL:file options:nil];
AVPlayerItem * item = [[AVPlayerItem alloc] initWithAsset:asset];
__block AVPlayer * player = [[AVPlayer alloc]initWithPlayerItem:item];
__block id finishObserver = [[NSNotificationCenter defaultCenter] addObserverForName:AVPlayerItemDidPlayToEndTimeNotification
object:player.currentItem
queue:[NSOperationQueue mainQueue]
usingBlock:^(NSNotification *note) {
[[NSNotificationCenter defaultCenter] removeObserver:finishObserver];
// Reference the 'player' variable so ARC doesn't release it until it's
// finished playing.
player = nil;
}];
// Trigger asynchronous load
[asset loadValuesAsynchronouslyForKeys:[NSArray arrayWithObject:#"tracks"] completionHandler:^{
// Start playing the beep (watch out - we're not on the main thread here)!
[player play];
}];
And it shooooooooooooould work!
If you are using your app also for recording - then don't forget to change setCategory to AVAudioSessionCategoryPlayAndRecord. In other case you won't be able to record
[[AVAudioSession sharedInstance] setCategory: AVAudioSessionCategoryPlayAndRecord error:&setCategoryErr];