[directmusic] Re: DirectMusic and multiple threads
- From: "Vytautas Leonavicius" <vytas@xxxxxxxxxxxxx>
- To: <directmusic@xxxxxxxxxxxxx>
- Date: Thu, 10 Jun 2004 17:45:17 +0200
I introduced temporal workaround into code by creating all performances in
main thread and loading resources in loader thread, this works. But anyway
it's just temporal hack, so I'll be discovering this problem. Thanks for you
idea, I'll have a look on DirectSound specifics :)
----- Original Message -----
From: "Todor Fay" <todor@xxxxxxxxxxxxx>
To: <directmusic@xxxxxxxxxxxxx>
Sent: Wednesday, June 09, 2004 4:27 PM
Subject: [directmusic] Re: DirectMusic and multiple threads
> Hmmm, interesting.
>
> This may have to do with the fact that the performance creates an
> instance of DirectSound. DirectSound, because of its ties into the
> drivers, might be finicky on this matter.
>
> -----Original Message-----
> From: directmusic-bounce@xxxxxxxxxxxxx
> [mailto:directmusic-bounce@xxxxxxxxxxxxx] On Behalf Of Vytautas
> Leonavicius
> Sent: Thursday, June 10, 2004 8:18 AM
> To: directmusic@xxxxxxxxxxxxx
> Subject: [directmusic] Re: DirectMusic and multiple threads
>
> Todor,
>
> Thanks for your reply. But in my application CoInitializeEx is called
> exactly the way you suggested. If not, I get an error.
>
> But I was wrong about that segments caused problems. I found out
> recently,
> that the problem is with performance object. If I create performance
> object
> in loader thread, sound is not played, however, if performance object is
> created in main thread, everything goes well. Here is the code of
> Performance object creation:
>
> CPerformance::CPerformance( HWND owner ) : mPerformance( 0 ), mVolume(
> 1.0f )
> {
> // Create performance object
> HRESULT hr = CoCreateInstance
> ( CLSID_DirectMusicPerformance, 0,
> CLSCTX_INPROC,
> IID_IDirectMusicPerformance8,
> reinterpret_cast< void** >(
> &mPerformance ) );
>
> if( FAILED( hr ) ) {
>
> THROW_DXERROR( hr, "Failed to intialize IDirectMusicPerformance8" );
>
> }
>
> ffects.
>
> hr = mPerformance->InitAudio( 0, 0, owner, DMUS_APATH_DYNAMIC_STEREO,
> 128,
> DMUS_AUDIOF_ALL, 0 );
>
> if ( FAILED( hr ) ) {
>
> if( hr == DSERR_NODRIVER ) {
>
> THROW_DXERROR( hr, "No sound card found." );
>
> }
>
> THROW_DXERROR( hr, "Failed to intialize IDirectMusicPerformance8" );
>
> }
>
> // Set maximum volume.
> setVolume( mVolume );
> }
>
>
> ----- Original Message -----
> From: "Todor Fay" <todor@xxxxxxxxxxxxx>
> To: <directmusic@xxxxxxxxxxxxx>
> Sent: Wednesday, June 09, 2004 3:22 PM
> Subject: [directmusic] Re: DirectMusic and multiple threads
>
>
> > This almost sounds like a COM initialization issue. Are you calling
> > CoInitializeEx(NULL,COINIT_MULTITHREADED) at the start of your
> program?
> >
> > Todor
> >
> > -----Original Message-----
> > From: directmusic-bounce@xxxxxxxxxxxxx
> > [mailto:directmusic-bounce@xxxxxxxxxxxxx] On Behalf Of Vytautas
> > Leonavicius
> > Sent: Thursday, June 10, 2004 5:50 AM
> > To: directmusic@xxxxxxxxxxxxx
> > Subject: [directmusic] DirectMusic and multiple threads
> >
> > Hello Group,
> > I am having trouble with DirectMusic. Our app. uses 2 separate
> threads,
> > one for resource loading another for main flow. IDirectMusicSegment
> > objects, loaded on loader thread are not playing in main thread. No
> > errors are returned, just silence.
> >
> > If I try to play sound in loader thread (immidiately after load)
> sound's
> > playing well. Please help!
> >
> > Vytautas
> >
> >
> >
> >
>
>
>
>
>
>
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