[openal] Extending max source gain

Ethan Lee flibitijibibo at flibitijibibo.com
Fri Aug 26 09:22:05 EDT 2016

Following up on this in the ML, since I imagine most aren't seeing it on 

I've drafted up the other design where we just remove the limit 
internally in Soft and add a query to see the implementation's max gain 


I'm hoping to put a variant of this into production soon, so feedback 


On 08/10/2016, 17:03:01, Chris Robinson wrote:
 > On 08/10/2016 10:50 AM, Ethan Lee wrote:
 > > My only real concern is the possibility of breaking existing behavior
 > > for older applications. That would only ever apply if AL_MAX_GAIN's
 > > default was changed, but as long as that remains at 1.0f then we can
 > > just allow up to FLT_MAX and not affect existing code.
 > Yes, the default would remain 1.0f for compatibility. This would just
 > increase the range it's allowed to be set to.
 > > Something like an
 > > alGetFloat(AL_MAX_GAIN_LIMIT_SOFT) would work for us in FNA, though 
 > > kind of limitation may as well apply to AL_MIN_GAIN too since we're
 > > thinking about MAX.
 > Note that the queried max limit would be the implicit clamping level an
 > implementation may do after the final volume is calculated, not strictly
 > how high the source's AL_MAX_GAIN property can go. I don't imagine an
 > implementation will have a minimum volume clamp like it may have a
 > maximum volume clamp. I suppose there could be a query for the minimum
 > non-0 volume before it just skips rendering and goes silent, though I
 > don't know how useful that would be.

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