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List:       helix-audio-dev
Subject:    Re: [hxaudio] Re: DirectSound problem
From:       "Greg Wright" <gwright () real ! com>
Date:       2003-01-29 0:06:49
Message-ID: 03e701c2c72a$521a3bc0$f16b17ac () gwright2
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It is hard to tell with just splay. but, if you set to volume to 40 and
then shut down the player, the next time it runs it should come up at 40
again. If it doesn't, there is a bug. 

Easy to test if you have moved DLLs over to R1P. Chris will know how
easy it is to move the DLLs to get R1P to work.

You could also just change the prefs by hand (Volume) and make sure
it comes up at that volume.

--greg.

> If I do the changes that I described in my CR: email, stuff works for me. 
> Since I don't know what the correct (or specified) behaviour is, I'll leave 
> it to the experts to file a bug :-)
> 
> - Wolfgang
> 
> At 03:43 PM 1/28/2003 -0800, Greg Wright wrote:
> >Wolfgang, if this is broken you can just file a bug against
> >it and we will fix it, that is, if the core isn't setting
> >the volume at startup correctly. Of course, you are welcome
> >to fix it as well. :)
> >
> >--greg.
> >
> >
> >----- Original Message -----
> >From: "Bahl, Manuj" <mbahl@real.com>
> >To: "Greg Wright" <gwright@real.com>; <csloan@real.com>; "Wolfgang 
> >Schildbach" <wschildbach@real.com>
> >Cc: <dev@audio.helixcommunity.org>
> >Sent: Tuesday, January 28, 2003 3:36 PM
> >Subject: Re: DirectSound problem
> >
> >
> >ok...
> >this is how it happens in R1P.
> >When the device is opened the audio session reads the reg key and sets the 
> >volume and then anything else happens.
> >Also the audio session sets the reg key during shut down.
> >
> >Now this leaves the problem of the key not being set for the first 
> >playback after install.
> >We fixed that problem in the TLC.... such that when we create our volume 
> >UI control on the player frame, we check to see if the reg
> >key is set... if not we set it to 100.( max volume ). Maybe you could do 
> >the same in your piece of code.
> >
> >I would suggest that this logic for setting the default 100 value for the 
> >volume in the reg not be device specific and done in the
> >audio session object or even the core. This thing should ideally be 
> >abstracted from the device.
> >-------------------------------------------------
> >Bahl, Manuj
> >Software Design Engineer, RealONE Player
> >RealNetworks. ( www.real.com  )
> >(206) 892 6777
> >mbahl@real.com
> >
> >   ----- Original Message -----
> >   From: Wolfgang Schildbach
> >   To: Bahl, Manuj ; Greg Wright ; csloan@real.com
> >   Cc: dev@audio.helixcommunity.org
> >   Sent: Tuesday, January 28, 2003 3:26 PM
> >   Subject: Re: DirectSound problem
> >
> >
> >   At least in helix, the audio session first asks the device about volume. At
> >   this point the device is not typically open, so it can only return a guess.
> >   Only if we don't have an audio device, or it is not capable of volume
> >   setting (if !(m_pCurrentAudioDev && m_bAudioDeviceSupportsVolume)), do we
> >   ask the registry.
> >
> >   Then, the audio device is opened, and finally, the volume is set to what
> >   GetVolume() returned earlier.
> >
> >   - Wolfgang
> >
> >   At 03:03 PM 1/28/2003 -0800, Bahl, Manuj wrote:
> >   >Yes the core should be doing that ..
> >   >and then it calls init volume...
> >   >Please see why the init volume call is not being made. The core is
> >   >designed so that if it does not finds the pref ie on the first play after
> >   >install it will set it to 100 full blast.
> >   >
> >   >You should not have to write any new code for initial volume.
> >   >
> >   >-------------------------------------------------
> >   >Bahl, Manuj
> >   >Software Design Engineer, RealONE Player
> >   >RealNetworks. ( <http://www.real.com>www.real.com  )
> >   >(206) 892 6777
> >   ><mailto:mbahl@real.com>mbahl@real.com
> >   >----- Original Message -----
> >   >From: <mailto:gwright@real.com>Greg Wright
> >   >To: <mailto:mbahl@real.com>mbahl@real.com ;
> >   ><mailto:csloan@real.com>csloan@real.com ;
> >   ><mailto:wschildbach@real.com>Wolfgang Schildbach
> >   >Cc: <mailto:dev@audio.helixcommunity.org>dev@audio.helixcommunity.org
> >   >Sent: Tuesday, January 28, 2003 2:31 PM
> >   >Subject: Re: DirectSound problem
> >   >
> >   >moving to the  <mailto:dev@audio>dev@audio mailing list....get on there is
> >   >your aren't. :)
> >   >
> >   >
> >   >
> >   >I am new to this discussion but, if it helps, the core should be
> >   >setting the volume of the device to the last volume it was at when
> >   >the core shutdown. The last volume used is stored in the prefs.
> >   >
> >   >--greg.
> >   >
> >   >
> >   >
> >   >
> >   >
> >   >----- Original Message -----
> >   >From: "Wolfgang Schildbach"
> >   ><<mailto:wschildbach@real.com>wschildbach@real.com>
> >   >To: <<mailto:mbahl@real.com>mbahl@real.com>;
> >   ><<mailto:csloan@real.com>csloan@real.com>
> >   >Cc: <<mailto:gwright@real.com>gwright@real.com>
> >   >Sent: Tuesday, January 28, 2003 2:29 PM
> >   >Subject: DirectSound problem
> >   >
> >   >
> >   >
> >   > > (Greg, this is about a discrepancy in behaviour old waveout driver 
> > vs. new
> >   > > DirectSound drive in audio/device)
> >   > >
> >   > > Chris,
> >   > >
> >   > > You were right -- the problem is in the volume, which is set to zero.
> >   > > Somewhere at the beginning, the audio session asks the device what 
> > volume
> >   > > it is set at. The DirectShow driver return 0 (silent), whereas the old
> >   > wave
> >   > > driver returned 100 (full blast).
> >   > >
> >   > > I believe we should change the DirectSound driver to reflect the wave
> >   > > driver, which is to return "default is full volume".
> >   > >
> >   > >
> >   > > - Wolfgang Schildbach, Principal Codec Engineer, RealNetworks Codec 
> > Group
> >   > > - fon +1-206-892 6349, email 
> > <mailto:wolfgang@real.com>wolfgang@real.com
> >   > >
> >   > >
> >
> >   -
> >   - Wolfgang Schildbach, Principal Codec Engineer, RealNetworks Codec Group
> >   - fon +1-206-892 6349, email wolfgang@real.com
> 
> -
> - Wolfgang Schildbach, Principal Codec Engineer, RealNetworks Codec Group
> - fon +1-206-892 6349, email wolfgang@real.com
> 
> 


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