iphone sdk 3.0 - CoreAudio - how to determine the end of the playing aac file -

i playing coreaudio on iphone, , unable find how know when song has finished play.

i put property listener on kaudioqueueproperty_isrunning, working when starting playing not @ end of file. it's work when stop audioqueue...

do have idea ?

thanks lot.

ps : using sample code excellent book iphone cool projects : http://apress.com/book/downloadfile/4453

edit :

there’s bug in code went out book. fix requires small modification -[audioplayer audiorequestdidfinish:] calls [queue endofstream].

this class uli kusterer illustrates functionality clearly.

here's header:

// //  uksound.h //  mobilemoose // //  created uli kusterer on 14.07.08. //  copyright 2008 void software. rights reserved. //  #import <uikit/uikit.h> #import <audiotoolbox/audiotoolbox.h>   #define knumberbuffers          2   @class uksound;   @protocol uksounddelegate  @optional -(void) sound: (uksound*)sender didfinishplaying: (bool)state;  @end    @interface uksound : nsobject {     audiofileid                     maudiofile;     audiostreambasicdescription     mdataformat;     audioqueueref                   mqueue;     audioqueuebufferref             mbuffers[knumberbuffers];     uint64                          mpacketindex;     uint32                          mnumpacketstoread;     audiostreampacketdescription *  mpacketdescs;     bool                            mdone;     id<uksounddelegate>             delegate;     int                             maxbuffersizebytes; }  @property (assign) id<uksounddelegate> delegate;  -(id)   initwithcontentsofurl: (nsurl*)theurl;  -(void) notifydelegateplaybackstatechanged: (id)sender;  -(void) play;   // private: -(void) audioqueue: (audioqueueref)inaq processbuffer: (audioqueuebufferref)incompleteaqbuffer;  @end 

here's implementation:

// //  uksound.m //  mobilemoose // //  created uli kusterer on 14.07.08. //  copyright 2008 void software. rights reserved. //  #import "uksound.h"   static void uksoundaqbuffercallback(void *                  inuserdata,                                     audioqueueref           inaq,                                     audioqueuebufferref     incompleteaqbuffer) {     uksound*    myself = (uksound*)inuserdata;      [myself audioqueue: inaq processbuffer: incompleteaqbuffer]; }   static void uksoundaqpropertylistenercallback( void *                  inuserdata,                                                 audioqueueref           inaq,                                                 audioqueuepropertyid    inid) {     [(uksound*)inuserdata performselectoronmainthread: @selector(notifydelegateplaybackstatechanged:) withobject: nil waituntildone: no]; }   @implementation uksound  @synthesize delegate;  -(id)   initwithcontentsofurl: (nsurl*)theurl {     self = [super init];     if( self )     {         maxbuffersizebytes = 0x10000;         osstatus    err = audiofileopenurl( (cfurlref)theurl, kaudiofilereadpermission, 0, &maudiofile );         if( err != noerr )             nslog(@"couldn't open audiofile.");         uint32 size = sizeof(mdataformat);         err = audiofilegetproperty( maudiofile, kaudiofilepropertydataformat, &size, &mdataformat );         if( err != noerr )             nslog(@"couldn't determine audio file format.");         err = audioqueuenewoutput( &mdataformat, uksoundaqbuffercallback, self, null, null, 0, &mqueue );         if( err != noerr )             nslog(@"couldn't create new output queue.");          // have couple of things take care of         // (1) setting conditions around vbr or cbr format - affects how read file         // if format vbr need use packet table.         if( mdataformat.mbytesperpacket == 0 || mdataformat.mframesperpacket == 0 )         {             // first check see max size of packet - if bigger             // our allocation default size, needs become larger             uint32 maxpacketsize;             size = sizeof(maxpacketsize);             err = audiofilegetproperty( maudiofile, kaudiofilepropertypacketsizeupperbound, &size, &maxpacketsize);             if( err != noerr )                 nslog(@"couldn't max packet size of audio file.");             if( maxpacketsize > maxbuffersizebytes )                  maxbuffersizebytes = maxpacketsize;              // need packet descpriptions file reading             mnumpacketstoread = maxbuffersizebytes / maxpacketsize;             mpacketdescs = malloc( sizeof(audiostreampacketdescription) * mnumpacketstoread );         }         else         {             mnumpacketstoread = maxbuffersizebytes / mdataformat.mbytesperpacket;             mpacketdescs = null;         }          // (2) if file has cookie, should , set on aq         size = sizeof(uint32);         err = audiofilegetpropertyinfo( maudiofile, kaudiofilepropertymagiccookiedata, &size, null );         if( !err && size )         {             char* cookie = malloc( size );             err = audiofilegetproperty( maudiofile, kaudiofilepropertymagiccookiedata, &size, cookie );             if( err != noerr )                 nslog(@"couldn't magic cookie of audio file.");             err = audioqueuesetproperty( mqueue, kaudioqueueproperty_magiccookie, cookie, size );             if( err != noerr )                 nslog(@"couldn't transfer magic cookie of audio file qudio queue.");             free( cookie );         }          err = audioqueueaddpropertylistener( mqueue, kaudioqueueproperty_isrunning,                                     uksoundaqpropertylistenercallback,                                     self );         if( err != noerr )             nslog(@"couldn't register playback state changes.");              // prime queue data before starting         mdone = false;         mpacketindex = 0;         for( int = 0; < knumberbuffers; ++i )         {             err = audioqueueallocatebuffer( mqueue, maxbuffersizebytes, &mbuffers[i] );             if( err != noerr )                 nslog(@"couldn't allocate buffer %d.", i);              uksoundaqbuffercallback( self, mqueue, mbuffers[i] );              if( mdone ) break;         }     }      return self; }   -(void) dealloc {     osstatus err = audioqueuedispose( mqueue, true );     err = audiofileclose( maudiofile );     if( mpacketdescs )         free( mpacketdescs );      [super dealloc]; }   -(void) play {     osstatus err = audioqueuestart( mqueue, null );     if( err != noerr )         nslog(@"couldn't start audio queue.");     else         [self retain]; }   -(bool) isplaying {     uint32      state = no,                 size = sizeof(uint32);     osstatus    err = audioqueuegetproperty( mqueue, kaudioqueueproperty_isrunning, &state, &size );     if( err != noerr )         nslog(@"couldn't play state of queue.");      return state; }   -(void) notifydelegateplaybackstatechanged: (id)sender; {     if( ![self isplaying] )     {             nslog(@"insert functionality here.");         [delegate sound: self didfinishplaying: yes];         audioqueuestop( mqueue, false );         [self release];     } }   -(void) audioqueue: (audioqueueref)inaq processbuffer: (audioqueuebufferref)incompleteaqbuffer {     if( mdone )         return;      uint32 numbytes;     uint32 npackets = mnumpacketstoread;      // read npackets worth of data buffer     osstatus err = audiofilereadpackets( maudiofile, false, &numbytes, mpacketdescs, mpacketindex, &npackets,                                          incompleteaqbuffer->maudiodata);     if( err != noerr )         nslog(@"couldn't read buffer.");      if (npackets > 0)     {         incompleteaqbuffer->maudiodatabytesize = numbytes;                // queues buffer audio input/output.         err = audioqueueenqueuebuffer( inaq, incompleteaqbuffer, (mpacketdescs ? npackets : 0), mpacketdescs );         if( err != noerr )             nslog(@"couldn't enqueue buffer.");          mpacketindex += npackets;     }     else     {         uint32      state = no,                     size = sizeof(uint32);         osstatus    err = audioqueuegetproperty( mqueue, kaudioqueueproperty_isrunning, &state, &size );          // should calling following, makes app hang.         if( state )         {             err = audioqueuestop( mqueue, false );             if( err != noerr )                 nslog(@"couldn't stop queue.");                 // reading npackets == 0 our eof condition         }         mdone = true;     } }  @end 

when call initwithcontentsofurl: (nsurl*)theurl method, uksoundaqpropertylistenercallback added audio queue. set respond kaudioqueueproperty_isrunning audio queue property. after play method called , file finishes playing, uksoundaqpropertylistenercallback called in turn calls notifydelegateplaybackstatechanged method. have added nslog message method illustrate when file stops playing.

i'd happy share xcode project demonstrates functionality.