Audio Session Programming Guide

《Audio Session Programming Guide》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。

1、AudioSessionProgrammingGuideContentsAboutConfiguringAudioBehavior7AnAudioSessionEncapsulatesaSetofBehaviors7CategoriesExpressAudioRoles7DelegatesSupportInterruptionHandling8CallbacksSupportAudioRouteChangeHandling8PropertiesSupportAdvancedFeatures8HowtoUseThisDocument9Prere

2、quisites9SeeAlso9AudioSessionBasics11WhyDoesiOSNeedtoManageAudio?11WhatIsanAudioSession?11WhatIsanAudioSessionCategory?12AudioSessionDefaultBehavior—WhatYouGetforFree12WhyaDefaultAudioSessionUsuallyIsn’tWhatYouWant14HowtheSystemResolvesCompetingAudioDemands14TheTwoAudioSess

3、ionAPIs16DevelopingwiththeAudioSessionAPIs17ConfiguringYourAudioSession18InitializingYourAudioSession18ActivatingandDeactivatingYourAudioSession19ChoosingtheBestCategory19HowCategoriesAffectEncodingandDecoding21SettingandChangingYourAudioSessionCategory22Fine-TuningtheCateg

4、ory22HandlingAudioInterruptions24AudioInterruptionHandlingTechniques24TheInterruptionLifeCycle26HandlingInterruptionsUsingDelegateMethods27HandlingInterruptionsUsingaCallbackFunction28OpenALandAudioInterruptions292012-12-13

5、Copyright©2012AppleInc.AllRightsReserved.2Contents

6、Hardware-AssistedCodecsandAudioInterruptions29HandlingAudioHardwareRouteChanges31VarietiesofAudioHardwareRouteChange31RespondingtoAudioHardwareRouteChanges32OptimizingforDeviceHardware34SpecifyingPreferredAudioHardwareSettings34QueryingHardwareCharacteristics35RespondingtoP

7、ropertyValueChangeEvents36WorkingwithMoviesandiPodMusic37WorkingwithMusicPlayers37WorkingwithMoviePlayers38UsingtheMediaPlayerFrameworkExclusively39AudioSessionCookbook41InitializinganAudioSession41Activating/DeactivatingYourAudioSession42SettingtheCategory42CheckingifOther

8、AudioisPlayingDuringAppLaunch43ModifyingPlaybackMixingBehavior45EnsuringThatAudioContinuesWhentheScreenLocks46ConfiguringAudioUnitstoContinuePlayingWhentheScreenLocks46OptimizingforMinimalPowerConsumption46OptimizingforLowLatency48RedirectingOutputAudio48SupportingBluetooth

9、AudioInput49RespondingtoAudioSessionInterruptions50UsingtheAVAudioSessionDelegateP