audiotoolbox - iOS: Is this an audio-session simulator bug? keywords: kAudioSessionProperty_AudioRoute kAudioSessionUnsupportedPropertyError -


can confirm whether indeed bug? ( if go off , file apple ).

attempting fetch kaudiosessionproperty_audioroute returning error code kaudiosessionunsupportedpropertyerror on version of simulator prior 4.3 ( latest version @ time of writing ).

this 1 dead easy reproduce.

start new project ( using xcode 4.0.2 build 4a2002a, standard build ), window-based project "audiosessionbug"

include audiotoolbox framework

replace application delegate's .m file following:

// //  audiosessionbugappdelegate.m //  audiosessionbug // //  created pi on 02/07/2011. //  copyright 2011 pi. rights reserved. //  #import "audiosessionbugappdelegate.h"  #import <audiotoolbox/audiotoolbox.h>  #define set_property( prop, type, val ) \ { \ osstatus ret = audiosessionsetproperty( prop, sizeof( type ), &(type){ val } ); \ if ( ret != kaudiosessionnoerror ) \ { \ nslog( @"audiosessionsetproperty failed for: %s!", #prop ); \ return; \ } \ }  enum  {     kno = 0,     kyes = 1 };  // - - -   @interface audiosessionbugappdelegate ( )  - (void) setupsession;  @end  // - - -   @implementation audiosessionbugappdelegate   @synthesize window=_window;  - (bool)application:(uiapplication *)application didfinishlaunchingwithoptions:(nsdictionary *)launchoptions {     // override point customization after application launch.     [self.window makekeyandvisible];       [self setupsession];       return yes; }  - (void) setupsession {     osstatus result = audiosessioninitialize( null, null, null, null );     assert( result == kaudiosessionnoerror );      set_property( kaudiosessionproperty_audiocategory,  uint32,   kaudiosessioncategory_playandrecord );      // make sure headphones plugged in!     {         // http://stackoverflow.com/questions/2753562/what-kind-of-routes-could-i-get-back-from-kaudiosessionproperty-audioroute-proper         cfstringref state = nil;                 uint32 propertysize = sizeof(cfstringref);         osstatus status = audiosessiongetproperty( kaudiosessionproperty_audioroute, &propertysize, &state );          if ( status == kaudiosessionunsupportedpropertyerror )         {             nslog( @" wtf? getting kaudiosessionproperty_audioroute gives kaudiosessionunsupportedpropertyerror ?!?!? " );         }          nslog( @" ok - done! " );          exit( 1 );     } }  - (void)dealloc {     [_window release];     [super dealloc]; }  @end

check works.

now change deployment target prior 4.3. 4.2.

run again on ipad simulator 4.3 -- ok
run again on ipad simulator 4.2 -- fail

i received following confirmation apple:

this bug fixed in 4.3 , have no plans fix bugs in earlier builds of simulator.


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