I made a streaming music player and it works fine in the foreground.
But in the background iOS4, it doesn't play the next song automatically. ( remote control works )
The reason is AudioQueueStart return -12985.
I already check the audio session. it just fine. I use AudioQueueStart when it start to play the music.
How can you remove AudioQueueStart?
- (void)play
{
[self setupAudioQueueBuffers]; // calcluate the size to use for each audio queue buffer, and calculate the // number of packets to read into each buffer
OSStatus status = AudioQueueStart(self.queueObject, NULL);
}
I read the answer in the web about the AudioQueueStart fail subject.
One thing to check is that the AudioSession is active first.
In my case, I had previously set the session to inactive between song changes before starting a new song:AudioSessionSetActive(false);
Once I removed this AudioQueueStart works just fine from the background.
In my experience, the -12985 message occurs because another app already has an audio session active when you try to start playback in your app. Options are to 1) instruct the user to close the other app, or 2) set mix mode (see kAudioSessionProperty_OverrideCategoryMixWithOthers).
The disadvantage of mix mode is if you depend on lock screen art or remote controls, they won't work with mix mode set.
I also faced with such problem week ago. I've spent two days to find solution and I found it. May be this link will help (it is official answer): http://developer.apple.com/library/ios/#qa/qa1668/_index.html
Make sure that you activate session from applicationDidEnterBackground task handler. Now my application can play sound in background.
See this.
You probably need to include the following:
[[UIApplication sharedApplication] beginReceivingRemoteControlEvents];
Towards the bottom there is a reiteration of the how important that line is. As it is not mentioned in any of the three main audio audio guides (AVFoundation, AudioSession, or AudioQueue) it can easily be missed.
I have the same problem.
I registry the AudioSessionInterruptionListener, pause the audio when phone call, resume it after the call end. but get -12985 error code when call AudioQueueStart to resume.
My solution is that I try to call AudioQueueStart after 0.02s.
I don't know the reason.
On iOS7, AudioQueueStart was returning '!int' ('tni!'), though i'm sure no one would be surprised to find that it's not documented in the docs or headers. It was the same issue, though, and the same fix (setting the audio session to active in the background task handler) worked for me.
Related
I am trying to make myself Digital audio to Analog audio converter
I have STM32F769i Discovery0: https://www.st.com/en/evaluation-tools/32f769idiscovery.html
Which has SPDIFRX and SPDIFTX ports
I found a fearly good starting point here: http://www.tjaekel.com/DiscoveryF7Audio/index.html
Also the guy posted here: https://www.openstm32.org/forumthread921
But the guy used STM32746G Discovery: https://www.st.com/en/evaluation-tools/32f746gdiscovery.html
Instead
So I went and tried to just get his SPDIF audio portion working on my board
My Project can be found here (I hope it compiles, with CubeIDE you never know what will happen :)): https://www.mediafire.com/file/n0s2z9p6nn735qg/SPDIF_Example.zip/file
I have no idea what I am doing wrong, but for some reason SPDIF_RX_IRQHandler (in stm32f7xx_it.c) is never called (LED never turns green, yea my debugging tehniques are primitive, but will explain why later)
So because of that HAL_SPDIFRX_ReceiveDataFlow_IT (in spdifrx.c) always returns HAL_TIMEOUNT, and of course no audio is ever played on the speakers
I am not sure what I am doing wrong
When I start MCU I call BSP_SPDIF_Init() (defined in spdifrx.c) in main.c right after I take care of the clock
if (BSP_SPDIFRX_Init() != HAL_OK)
{
Error_Handler();
}
And it appears it initializes all right, because I get HAL_OK back
Maybe I am not inializing GPIO properly from HAL_MspInit in stm32f7xx_hal_msp.c inproperly
I am realy out of ideas, what I am doing wrong, because the analog side of the audio does init, I can hear that as pop pop from the speakers when I power up my MCU, its just that SPDIF side has problems
I am is my setup crocked?
I am using this component radio as my SPDIF transmitter (Hama DIT2000M): https://de.hama.com/webresources/article-documents/00054/man/00054821man_en.pdf
It says it has SPDIF Audio out (it says its digital over coaxial)
I know its optical side is working fine because on my component receiver it plays just fine (it reports as 48khz Stereo)
Is my cable to long? I am using this cable: https://i.imgur.com/JqAxePF.jpg
(not sure who made it)
Now why do I debug with blinking leds, because where my test subject is (my Hama receiver), there is no computer so…. Blinking leds it is, I would like to avoid aditional libraries and have a minimum working example, because you never know what problems they could bring so that's why LCD is not used right now
I hope someone has any advice, eather how to get any data in to SPDIF port (because right now for some reason, I don't get anything) or what I am doing wrong for my audio not to play, the usage of STM32F769i Discovery0 instead of STM32746G Discovery is probably not responsible
I hope that this is a proper place for this king of questions, because I did ask a question regarding SPDIF on the STM forum: https://community.st.com/s/feed/0D53W00001z0RaqSAE
But didn't get any usefull advice there
Now SPDIF realy does not have much examples, there is only a polling example which does work (with the same cable), there is no interupt example, my interupt example (you can read the post on the STM forum post I linked) is not working as well (interupts are probably not broken right?)
So yea, I am lost a bit not sure what to do, and who to ask, so I tried here
PS: I know stackvoverflow does not like links to code, but I believe something is wrong with my project (interupts don't fire for some reason), and its realy hard to put this all into the question
Thanks for Anwsering and Best Regards
I managed to solve this, I guess I did not initialize SPDIF GPIO properly
after setting this
GPIO_InitStructure.Pin = GPIO_PIN_7;
GPIO_InitStructure.Mode = GPIO_MODE_AF_PP;
GPIO_InitStructure.Pull = GPIO_NOPULL;
GPIO_InitStructure.Speed = GPIO_SPEED_FAST;
GPIO_InitStructure.Alternate = DISCOVERY_SPDIFRX_AF;
HAL_GPIO_Init(GPIOD, &GPIO_InitStructure);
to this
GPIO_InitStructure.Pin = GPIO_PIN_12;
GPIO_InitStructure.Mode = GPIO_MODE_AF_PP;
GPIO_InitStructure.Pull = GPIO_NOPULL;
GPIO_InitStructure.Speed = GPIO_SPEED_FAST;
GPIO_InitStructure.Alternate = GPIO_AF7_SPDIFRX;
HAL_GPIO_Init(GPIOG, &GPIO_InitStructure);
interupts started to fire
I am working on a Chromecast custom receiver app, built on top of the sample app provided by Google (sampleplayer.CastPlayer)
The app manages a playlist, I would like the player to move on to the next item in the list after a video fails to play for whatever reason.
I am running into a situation where, after a video fails to load because of a network error, the player becomes unresponsive: in the 'onError_()' handler, my custom code will do this
var queueLoadRequest = ...
var mediaManager = ...
setTimeout (function(){mediaManager.queueLoad(queueLoadRequest)}), 5000
...the player does receive the LOAD event according to the receiver logs, but nothing happens on the screen, the player's status remains IDLEand the mediaManager.getMediaQueue().getItems() remains undefined. Same result trying to use the client controller to try to load a different video.
I have tried to recover with mediaManager.resetMediaElement() and player.reset() in the onError_ handler, but no luck.
For reference, here is a screenshot of the logs (filtered for errors only) leading up to the player becoming unresponsive. Note that I am not interested in fixing the original error, what I need to figure out is how to recover from it:
My custom code is most likely responsible for the issue, however after spending many hours + stripping the custom code to a bare minimum in an effort to isolate the responsible bit of code, I have not made any progress. I am not looking for a fix but rather for some guidance in troubleshooting the root cause: what could possibly cause the Player to become unresponsive? or alternatively how can one recover from an unresponsive Player?
I am creating a game using Libgdx. I have a lot of small sounds files in the MP3-format and since it is so many I do not preload them. I only load the sound I want to play when it is to be used, like this:
actorSound = Gdx.audio.newSound(Gdx.files.internal(sound));
The code above works great, but the rest of my sounds do not unfortunately. The actor above has its own class and plays a different sound every time it is touched.
When I try to play sounds in my Gamescreen I get the following error:
AUDIO_OUTPUT_FLAG_FAST denied by client
All the audiofiles have the same properties and have been recorded using the same microphone & Audacity. The files are all 44100Hz and only a few kb in size each.
I wonder why the sounds the Actor plays work and the other sounds do not?
I decided to try to change the non-working sounds to music instead and now they play fine - for a little while that is. I can play a full game, return to the menu and start a new game again. The second time I start a game I only get 3 sounds from the Gamescreen and then it is silent except for the sounds from the actor. The error that appears looks like this:
E/MediaPlayer: Error (1,-19)
I load the Music just the same way as the Sound:
gameSound = Gdx.audio.newMusic(Gdx.files.internal(soundeffect));
I have looked into the two errors by reading posts like these:
AUDIO_OUTPUT_FLAG_FAST denied by client
Mediaplayer error (-19,0) after repeated plays
But I'm not sure what to do or change to solve my problem. I would prefer Sound if that is possible, but Music is an acceptable workaround...
When it comes to Music it is probably as suggested in the URL, that I do not release the media players. I am not sure how to do that?
When I leave the GameScreen for another screen, like the MenuScreen or RewardScreen, I dispose Music first. The other screens use Music as well and the sounds are loaded when needed. When I change back to the GameScreen I dispose again and then start a new game...
Any ideas or suggestions? Any help is greatly appreciated.
I added AssetManager as suggested, and I now have a loding screen that loads all the sounds. I load them as sounds and not music, which is how I prefer it.
The sounds work well in the actual game but once I get to the reward screen, only the first sound plays and after that the app crashes with the following error:
06-02 07:47:09.774 6208-6282E/AndroidRuntime: FATAL EXCEPTION: GLThread 2935
Process: PID: 6208
java.lang.NullPointerException: Attempt to read from field 'com.badlogic.gdx.assets.AssetManager
Assets.Assets.manager' on a null object reference
at DelayedSounds(RewardsScreen.java:538)
at RewardsScreen.Update(RewardsScreen.java:567)
at Screens.RewardsScreen.render(RewardsScreen.java:577)
at Game.render(Game.java:46)
at com.badlogic.gdx.backends.android.AndroidGraphics.onDrawFrame(AndroidGraphics.java:459)
at android.opengl.GLSurfaceView$GLThread.guardedRun(GLSurfaceView.java:1562)
at android.opengl.GLSurfaceView$GLThread.run(GLSurfaceView.java:1262)
06-02 07:47:13.823 6208-6208 E/AndroidGraphics: waiting for pause
synchronization took too long; assuming deadlock and killing
The DelayedSounds method looks like this:
public void DelayedSounds(){
timer = timer + Gdx.graphics.getDeltaTime();
if(playitem == true && timer > 2){
itemsound = "vinster/" + item + ".mp3";
assets.manager.get(itemsound, Sound.class).play(volume);
//sound = Gdx.audio.newMusic(Gdx.files.internal(itemsound));
//sound.setVolume(volume);
//sound.play();
playitem = false;
}
if(playkeep == true && time > 3){
assets.manager.get("dialog/VINSTEN.mp3", Sound.class).play(volume);
//sound = Gdx.audio.newMusic(Gdx.files.internal("prizes/prize.mp3"));
//sound.setVolume(volume);
//sound.play();
playkeep = false;
}
}
As can be seen I use AssetManager now, and have commented out my old code for testing purposes. I define AssetManager in my main class and then pass it around to all other classes that uses sounds.
The RewardsScreen will only play the first sound and then it crashes on a NULL object reference as it seems.
If I change my code back to using Music in the RewardsScreen it works fine (see the code that is commmented out)
The sound I try to play is exactly the same in both cases. Assets class that handles the loading of all my assets has the sounds included and since I still get a NULL object I assume one or more items fails to load?
I search the logs and find this where it loads the sounds:
06-02 08:05:09.360 9844-9888/E/WVMExtractor: Failed to open libwvm.so: dlopen failed: library "libwvm.so" not found
06-02 08:05:09.395 9844-9888/ E/NdkMediaExtractor: sf error code: -1010
06-02 08:05:09.395 9844-9888/ E/SoundPool: Unable to load sample
Maybe this is related to my problem?
I load all the sounds in the same manner and most definitely seem to work, the loading is the regular:
manager.load("prizes/cash.mp3", Sound.class);
I still find the AUDIO_OUTPUT_FLAG_FAST denied by client in my logs but now the sounds are playing instead of being rejected.
Any more ideas about how to solve this?
Your link having enough information for your bug.
It's not good way to create Resource instance each time in Game, Create once and user All over your game, if possible use AssetManager.
Like create Music instance in onCreate() method of your game.
gameSound = Gdx.audio.newMusic(Gdx.files.internal(soundeffect));
Music having play(), resume() and many other helpful methods.
You can also take a look of this, it may be helpful.
This is in response to dan's (dan^spotify on IRC) offer to take a look at my testcase, but I post it here in case anyone has encountered similar issues.
I'm experiencing a problem with libspotify where the application crashes (memory access violation) in both of these two scenarios:
the first sp_session_process_events (triggered by notify main thread callback) that's called after the sp_session_logout() function is called crashes the application
skipping logout and calling sp_session_release() crashes the application
I've applied sufficient synchronization from the session callbacks, and I'm otherwise operating on a single thread.
I've made a small testcase that does the following:
Creates session
Logs in
Waits 10 seconds
Attempts to logout, upon which it crashes (when calling sp_session_process_events())
If it were successful in logging out (which it isn't), would call sp_session_release()
I made a Gist for the testcase. It can be found here: https://gist.github.com/4496396
The test case is made using Qt (which is what I'm using for my project), so you'd need Qt 5 to compile it. I've also only written it with Windows and Linux in mind (don't have Mac). Assuming you have Qt 5 and Qt Creator installed, the instructions are as follows:
Download the gist
Copy the libspotify folder into the same folder as the .pro file
Copy your appkey.c file into the same folder
Edit main.cpp to login with your username and password
Edit line 38-39 in sessiontest.cpp and set the cache and settings path to your liking
Open up the .pro file and run from Qt Creator
I'd be very grateful if someone could tell me what I'm doing wrong, as I've spent so many hours trying anything I could think of or just staring at it, and I fear I've gone blind to my own mistakes by now.
I've tested it on both Windows 7 and Linux Ubuntu 12.10, and I've found some difference in behavior:
On Windows, the testcase crashes invariably regardless of settings and cache paths.
On Linux, if setting settings and cache to "" (empty string), logging out and releasing the session works fine.
On Linux, if paths are anything else, the first run (when folder does not already exist) logs out and releases session as it should, but on the next run (when folder already exists), it crashes in the exact same way as it does on Windows.
Also, I can report that sp_session_flush_caches() does not cause a crash.
EDIT: Also, hugo___ on IRC was kind enough to test it on OSX for me. He reported no crashes despite running the application several times in a row.
While you very well may be looking at a bug in libspotify, I'd like to point out a possibly redundant call to sp_session_process_events(), from what I gathered from looking at your code.
void SessionTest::processSpotifyEvents()
{
if (m_session == 0)
{
qDebug() << "Process: No session.";
return;
}
int interval = 0;
sp_session_process_events(m_session, &interval);
qDebug() << interval;
m_timerId = startTimer(interval);
}
It seems this code will pickup the interval value and start a timer on that to trigger a subsequent call to event(). However, this code will also call startTimer when interval is 0, which is strictly not necessary, or rather means that the app can go about doing other stuff until it gets a notify_main_thread callback. The docs on startTimer says "If interval is 0, then the timer event occurs once every time there are no more window system events to process.". I'm not sure what that means exactly but it seems like it can produce at least one redundant call to sp_session_process_events().
http://qt-project.org/doc/qt-4.8/qobject.html#startTimer
I notice that you will get a crash on sp_session_release if you have a track playing when you call it.
I have been chasing this issue today. Login/logout works just fine on Mac, but the issue was 100% repeatable as you described on Windows.
By registering empty callbacks for offline_status_updated and credentials_blob_updated, the crash went away. That was a pretty unsatisfying fix, and I wonder if any libspotify developers want to comment on it.
Callbacks registered in my app are:
logged_in
logged_out
notify_main_thread
log_message
offline_status_updated
credentials_blob_updated
I should explicitly point out that I did not try this on the code you supplied. It would be interesting to know if adding those two extra callbacks works for you. Note that the functions I supply do absolutely nothing. They just have to be there and be registered when you create the session.
Adding the following call in your "logged in" libspotify callback seems to fix this crash as detailed in this SO post:
sp_session_playlistcontainer(session);
I see this issue only on the iPad. The same things works as expected on the iPhone.
I am opening the URL from my application in a UIWebView. If the URL is a normal web page, it works fine as expected. But if the URL is that of a remote video/audio file, the UIWebView opens the default player which is again good.
Now when I dismiss the UIWebView (by clicking on the Done button on the player), the streaming doesn't stop and the audio/video keeps playing in the background (I cannot see it but it does keep playing in the background, can hear it). The UIViewController in which the webview was created is also dealloced (I put in a log statement in the dealloc method) but the streaming doesn't stop.
Can someone please help me out on why this could be happening? And how can I stop the audio/video streaming when the UIWebView is closed?
Thanks.
I have the same issue as stated but in this case the video that won't stop playing is a Youtube video embeded using the object/embed method.
I spent a long time trying to figure out how to get the video to stop playing and the only solution I found was to tell the UIWebView to load a blank page before dismissing the view:
[self.webContent loadRequest:NSURLRequestFromString(#"about:blank")];
Edit(2015-05-12): As mentioned by #chibimai below, this answer by alloc_iNit works along the same lines but since my answer is from 5 years ago -- and his only 4 -- the linked answer may be more applicable. I no longer do iPhone dev work so I cannot determine which is better either way.
I also found this behaviour simply because the web view hadn't been released.
I know this is pretty old thread, but for the sake of new developers like me.
My scenario was: I was using split controller, with media list on master and player in the detail controller section
I faced the same issue and tried all sorts of workaround.
I finally figured it out that the problem was simple, I was holding the reference of the detail controller in my master, and was not releasing the earlier detail controller. A simple release in the master at the right place solved the issue.
I'm working on the same problem. I've found that if you define something like this in your script tag:
function stopVideo(){ video.pause(); }
window.onunload = stopVideo;
Then in your UIViewController, add in:
-(void)viewWillDisappear:(BOOL)animated{
[webView stringByEvaluatingJavaScriptFromString:#"window.onunload();"];
[super viewWillDisappear:animated];
}
It seems to try to pause/stop the video for several seconds, but then you hear the audio continue to play!
Update!
This is a general bug with the media player. You have to set the playback time to -1 in order to make it really stop.
I've just had an issues with an mp4 file opening automatically in media player from a web-page without possibility to close it - "Done" button was only seen in video fullscreen mode and just closed fullscreen, so I had no way to return to the webpage without adding a "Back" button to the navigation bar. (on iPhone the video was opening in a separate view with "Done" button taking back to the WebView with the source page)
The workaround that helped me is to open the video file in a separate media player.
catch opening an MP4 file
- (BOOL) webView: (UIWebView *) webView shouldStartLoadWithRequest: (NSURLRequest *) request navigationType: (UIWebViewNavigationType) navigationType
{
NSRange range = [request.URL.absoluteString rangeOfString: #".mp4" options: NSCaseInsensitiveSearch];
if ( range.location != NSNotFound ) //opening MP4 video file
{
[self showFullscreenMediaWithURL: request.URL];
return NO;
}
return YES;
}
where
- (void) showFullscreenMediaWithURL: (NSURL *) mediaURL
{
MPMoviePlayerViewController *ctrl = [[MPMoviePlayerViewController alloc] initWithContentURL: mediaURL];
ctrl.modalTransitionStyle = UIModalTransitionStyleCrossDissolve;
[self presentModalViewController: ctrl animated: YES];
[ctrl release];
}
opens video with URL in a media player in a model view
don't forget to add MediaPlayer.framework to the project and import
#import <MediaPlayer/MediaPlayer.h>
for the project to be built
PS. many thanks to Viktor Gubrienko for the solution
In fact, I prefer to use the null link to solve the problem.
like this:
[self.webView loadRequest:NSURLRequestFromString(#"about:blank")];
thanks to your thread on this issue I was able to figure out a solution that resolves the issue completely, and I tested it on my IPad, not just the simulator. This also resolves the issue with the audio playing. This is not the permanent resolution but an effective work around.
Overview of the approach:
Basically all that is needed is to send a short audio file to the webView. I made a copy of the IMac submarine.m4v file, I called ping.m4v and added it to my xcode project in the resource folder.
Then at the point when I want the video / audio to stop I do the following steps:
webView.hidden = TRUE;
NSString *mimeType = [[NSString alloc] initWithString:#"video/x-m4v"];
NSData *PingData = [NSData alloc];
PingData = [NSData dataWithContentsOfFile:PingFilePath];
[webView loadData:PingData MIMEType:mimeType textEncodingName:nil baseURL:[NSURL URLWithString:PingFilePath]];
Now you also have to handle error "204". Error 204 seems to be just a warning saying that webView is going to handle this audio file. To handle the error I added this single line (see >>>) to didFailLoadWithError
(void)webView:(UIWebView *)BHwebView didFailLoadWithError:(NSError *)error
{
NSLog(#"Error %i", error.code);
if (error.code == NSURLErrorCancelled) return; // this is Error -999
if (error.code == 204) return; // this is Error 204 - for audio player in webview.
Finally I turn webView.hidden = FALSE right before I display my next Audio/Video. This way the little play bar for the sound file does not show on the display. There is just a soft ping sound... any audio file will do...
I hope this helps...
This is what I use. It does log this error "Deactivating an audio session that has running I/O. All I/O should be stopped or paused prior to deactivating the audio session." but does stop the audio file from playing (fading out) and remembers the play position.
AVAudioSession *s = [AVAudioSession sharedInstance];
if (s != nil)
[s setActive:NO error:nil];
As web view hadn't been released, the video keeps playing on the web view in background.
So you need to release the web view simply by using below code which works fine for me.
- (void)viewDidDisappear:(BOOL)animated
{
[super viewDidDisappear:(BOOL)animated];
[self.wvwebview removeFromSuperview];
}
I hope this helps...
in my case using loadHTMLString and not loadRequest with #"about:blank", fix the problem on macOS
[self.wkWebView loadHTMLString:#"about:blank" baseURL:nil];
I had the same issue in Table view where the table view cell has a webview which loads an audio file . Once you play and go back to another screen the audio still plays .
Solution : reload the table view in viewWillDisappear(_:) of the table view controller and the audio will stop playing once you navigate to another screen .