Correction on a typo: he AmbientSound mode still allows *now* background audio, correct?
*now => no* Thanks, Beinan On Wed, Jan 21, 2015 at 2:33 PM, Beinan Li <[email protected]> wrote: > It is still not the right fix using "App plays audio" for the key "Require > background mode" in info.plist. > AudioOutputUnitStart() may still fail on iOS 8.1.2 devices. > > Looking at AVAudioSessionErrorCodeCannotStartPlaying again, I see that > with that info.plist option, > the AmbientSound mode still allows now background audio, correct? > > I could still add sleep() to it, but this sounds too ad-hoc to be an > acceptable solution for all the devices. > > Should I file a bug report to Apple? Any thoughts? > > Thanks, > Beinan > > > On Mon, Jan 19, 2015 at 5:23 PM, Beinan Li <[email protected]> wrote: > >> OK, found it. Thanks for the tip Scott! >> Under those modes, I'd have to enable the background mode for audio, >> otherwise when it takes longer for the foreground phone app to dismiss, >> the AudioOutputUnitStart() may fail its turn. >> >> >> >> Thanks, >> Beinan >> >> >> On Mon, Jan 19, 2015 at 5:03 PM, Beinan Li <[email protected]> wrote: >> >>> Thanks. I found some clues. >>> >>> Just under AmbientSound and iOS8 devices, >>> >>> 1. If I put a sleep(2); before the AudioOutputUnitStart() call, then >>> the audio will restore normally. And 2 is an empirical number, 1 would be >>> too short, and 3 seems to work the same way as 2. >>> >>> 2. If the first call to AudioOutputUnitStart() fails, there is just no >>> use to wait and retry. >>> >>> This looks scary because I found no docs explaining the differences in >>> interruption handling "timing" between iOS versions. And the number feels >>> completely random. >>> >>> Does anyone have any pointers? >>> >>> Thanks, >>> Beinan >>> >>> >>> On Mon, Jan 19, 2015 at 4:36 PM, Douglas Scott <[email protected]> >>> wrote: >>> >>>> Just as a starting point: if you grep that error in the public audio >>>> headers, you will find it is: >>>> >>>> AVAudioSessionErrorCodeCannotStartPlaying = '!pla', /* 0x21706C61, >>>> 561015905 */ >>>> >>>> >>>> with description: >>>> >>>> @constant AVAudioSessionErrorCodeCannotStartPlaying >>>> The app is not allowed to start recording and/or playing, usually >>>> because of a lack of audio key in >>>> its Info.plist. This could also happen if the app has this key but >>>> uses a category that can't record >>>> and/or play in the background (AVAudioSessionCategoryAmbient, >>>> AVAudioSessionCategorySoloAmbient, etc.). >>>> >>>> On Jan 19, 2015, at 12:11 PM, Beinan Li <[email protected]> wrote: >>>> >>>> Hi CoreAudio, >>>> >>>> Our app used to handle interruption correctly with the registered >>>> interruption listener. >>>> Now on iOS 8 under kAudioSessionCategory_AmbientSound category, >>>> whenever we reject a phone call, the call to AudioOutputUnitStart() for >>>> resuming the >>>> audio pipeline always returns: >>>> >>>> ERROR: [0x3afe09dc] 1230: AUIOClient_StartIO failed (561015905) >>>> >>>> And our apps will have no sound as a result. >>>> >>>> We set it to retry on fails but it would always fail on retries. >>>> >>>> We were we missing? >>>> >>>> Thanks, >>>> Beinan >>>> >>>> _______________________________________________ >>>> Do not post admin requests to the list. They will be ignored. >>>> Coreaudio-api mailing list ([email protected]) >>>> Help/Unsubscribe/Update your Subscription: >>>> >>>> https://lists.apple.com/mailman/options/coreaudio-api/douglas_scott%40apple.com >>>> >>>> This email sent to [email protected] >>>> >>>> >>>> >>> >> >
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