[Openal-devel] wrapper: AL_BUFFERS_PROCESSED always 0 when AL_LOOPING=AL_TRUE

[Jarosław Pleskot]

I see. I think this information should be included in OpenAL specification.

Jarek

----- Original Message ----- 
From: <dpeacock at creativelabs.com>
To: <openal-devel at opensource.creative.com>
Sent: Thursday, October 27, 2005 11:18 PM
Subject: Re: [Openal-devel] wrapper: AL_BUFFERS_PROCESSED always 0 when 
AL_LOOPING=AL_TRUE


>
>
>
>
> Hi,
>
> After talking to Garin, we want to clarify something...
>
> When you enable looping on a Source that has Buffers queued on it, the
> Source will loop around the entire queue.   So, as soon as looping is
> enabled, all buffers in the queue will be marked as 'pending' (even the
> ones that may have been marked as 'processed').   This is because all the
> buffers will be played again by the source.   While looping is 'on', no
> buffers will ever be marked as 'processed'.    When you remove looping 
> from
> a Source playing a queue of buffers, then depending upon the current play
> position in the queue, you may find that some of the buffers are instantly
> marked as 'processed', because they will not be played again.
>
> It looks like there are a couple of bugs in the native device in this 
> area,
> which we will have to look into.
>
> Dan
>
>
> Notice
> The information in this message is confidential and may be legally
> privileged.  It is intended solely for the addressee.  Access to this
> message by anyone else is unauthorized.  If you are not the intended
> recipient,  any disclosure,  copying or distribution of the message,  or
> any action taken by you in reliance on it,  is prohibited and may be
> unlawful.  If you have received this message in error,  please delete it
> and contact the sender immediately.  Thank you.
>
>
>
>
>             Garin Hiebert
>             <garinh at cheesetoa
>             st.net>                                                    To
>             Sent by:                  Jarosław Pleskot
>             openal-devel-admi         <jarekpleskot at poczta.onet.pl>
>             n at opensource.crea                                          cc
>             tive.com                  <openal-devel at opensource.creative.c
>                                       om>
>                                                                   Subject
>             10/27/2005 12:44          Re: [Openal-devel] wrapper:
>             PM                        AL_BUFFERS_PROCESSED always 0 when
>                                       AL_LOOPING=AL_TRUE
>
>
>
>
>
>
>
>
>
>
>> When I'm using wrapper (both devices: Generic Hardware & Generic
>> Software)
>> openal always return 0 when I'm trying to get
>> AL_BUFFERS_PROCESSED value with looping turned on for the same source.
>>
>> When I'm using native device (SB Audigy Audio) I'm getting correct
>> value.
>
> This would indeed seem to be a bug with the wrapper code.  Any
> buffers which had already been processed at the time AL_LOOPING is
> set true should remain processed and the AL_BUFFERS_PROCESSED value
> should reflect that.  Naturally, with AL_LOOPING set true, no _new_
> buffers are going to be processed...
>
>> Another problem: SB Audigy Audio goes to AL_STOPPED state on
>> alSourcePause operation (at least in streaming mode)
>
> I'll tag that for investigation as well -- it certainly seems like a
> bug.
>
> Garin
>
> _______________________________________________
> openal-devel mailing list
> openal-devel at opensource.creative.com
> http://opensource.creative.com/mailman/listinfo/openal-devel
>
> ForwardSourceID:NT00029302
>
> _______________________________________________
> openal-devel mailing list
> openal-devel at opensource.creative.com
> http://opensource.creative.com/mailman/listinfo/openal-devel
>