[Openal] EFX Clarifications 2

[Christopher Fitzgerald]

Greetings,

Is it possible for someone in the know to lay out the exact order and application of the following properties for the effect slot, reverb effect, and source?

AL_EFFECTSLOT_AUXILIARY_SEND_AUTO
AL_EFFECTSLOT_GAIN
AL_AUXILIARY_SEND_FILTER_GAIN_AUTO
AL_ROOM_ROLLOFF_FACTOR
AL_REVERB_ROOM_ROLLOFF_FACTOR

The documentation isn't entirely clear to me as to how these interact in all cases.  My assumption from what I can read and from testing Generic Hardware and Generic Software is that it works as follows (please correct me if I'm wrong):

roomRolloff = AL_REVERB_ROOM_ROLLOFF_FACTOR;
if (AL_EFFECTSLOT_AUXILIARY_SEND_AUTO == AL_TRUE)
   roomRolloff += AL_ROOM_ROLLOFF_FACTOR;
AL_EFFECTSLOT_GAIN *= Attenuate (roomRolloff);
if (AL_AUXILIARY_SEND_FILTER_GAIN_AUTO == AL_TRUE)
   AL_EFFECTSLOT_GAIN *= Attenuate (AL_ROLLOFF_FACTOR);

Or possibly (since I can't disable AL_EFFECTSLOT_AUXILIARY_SEND_AUTO in either Generic Hardware or Generic Software):

// Maybe the below line should be in the if statement too?
roomRolloff = AL_REVERB_ROOM_ROLLOFF_FACTOR;
if (AL_EFFECTSLOT_AUXILIARY_SEND_AUTO == AL_TRUE) {
   roomRolloff += AL_ROOM_ROLLOFF_FACTOR;
   if (AL_AUXILIARY_SEND_FILTER_GAIN_AUTO == AL_TRUE)
      AL_EFFECTSLOT_GAIN *= Attenuate (AL_ROLLOFF_FACTOR);
}
AL_EFFECTSLOT_GAIN *= Attenuate (roomRolloff);

Any help with this matter would be greatly appreciated.  Thank you! :)

Regards,
- Christopher
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