- s_scaleDownAndClamp CVar so the clamping and scaling down of all
sounds (that is done to prevent clipping) can be disabled
(enabled by default)
- s_alOutputLimiter CVar to allow configuring ALC_SOFT_output_limiter
which (if enabled) reduces the overall volume if it gets too loud,
to avoid clipping (defaults to -1 = "let OpenAL decide")
- s_alHRTF to allow enabling or disabling HRTF, requires ALC_SOFT_HRTF
(defaults to -1 = "let OpenAL decide")
Those CVars can be changed at runtime and are applied immediately
(in case of s_alHRTF and s_alOutputLimiter by resetting the OpenAL
device, just like we do when a disconnect is detected)
Commit 3c01757d27 introduced scaling down all sounds to prevent too
many loud-ish sounds from making OpenAL scale the overall volume down.
The problem is that before this change, many sounds had a volume > 1.0,
but vastly different: e.g. player_machinegun_fire was 5.039685 (14dB)
and player_chaingun_fire was 1.414214 (3dB).
But in the end, all volumes were clamped to 1.0 before setting AL_GAIN
(because AL_GAIN only supports values between 0 and 1 by default), so
the machinegun and chaingun had the same volume after all.
When scaling those down to 1/3 of the original volume, some sounds that
used to have a volume of >= 1.0 (=> AL_GAIN set to 1.0) had a volume
lower than 1.0, so they suddenly the chaingun sounded quiter than
the machinegun. While theoretically this is more correct than before
(after all, the sound shader of player_chaingun_fire set a much lower
volume than that of player_machinegun_fire), it doesn't sound like it
used to (even with the old software sound backend!).
Clamping to 1.0 *before* scaling to 1/3 should restore the old behavior
(of all sounds with volume > 1.0 before clamping using the same AL_GAIN)
while still avoiding the issue of having OpenAL (Soft) scale down the
overall volume when shooting a metal wall with the shotgun.
Unsurprisingly the same problem (inconsistent weapon volumes due to
incorrect sound shaders setting the volume way to high and thus relying
on being clamped to 1.0) that occurred with my volume *= 0.333 hack
also happens when reducing the global volume.
So apply that global volume scale *after* clamping to 1.0
see https://github.com/bibendovsky/eaxefx/pull/28#issuecomment-1367436162
In idSampleDecoderLocal::DecodeOGG() `totalSamples` was 1 and
`reqSamples` was 0, which caused an endless loop.. this was caused by
idSoundWorldLocal::ReadFromSaveGame() setting
`chan->openalStreamingOffset` to an odd number, I think due to
`currentSoundTime` being an odd number.
To fix that, I round up `chan->openalStreamingOffset` to a (very) even
number, and to be double-sure I also added a check in DecodeOgg() to
make sure it exits the loop if `reqSamples` is 0.
It can be set to a value between 0.0 and 1.0.
1.0 sounds like it did before introducing this cvar; as many people
found the the effect way to strong, I made 0.5 the default value
Otherwise especially looped sounds continue playing while the menu
is open, especially noticeable when opening the menu while firing
the chaingun (the whirring sound continues playing).
the problem was that the sources were still associated to it, because
they get deleted after the listenerSlot: the sources get freed in
idSoundSystemLocal::Shutdown() which is called by
idCommonLocal::ShutdownGame() in line 3217,
while the listenerSlot is deleted via idSessionLocal::Shutdown()
-> delete sw/rw -> idSoundWorldLocal::~idSoundWorldLocal()
-> idSoundWorldLocal::Shutdown() - and idSessionLocal::Shutdown() is
called in idCommonLocal::ShutdownGame() line 3211, before the other.
I'm not gonna mess with the order of deleting things in ShutdownGame(),
but it's sufficient to unassociate the effect slot from the source
when destroying the emitters in idSoundWorldLocal::Shutdown(),
by adding a call for that to idSoundChannel::ALStop() - and destroying
the emitters before deleting listenerSlot.
Before this fix, with ALSOFT_LOGLEVEL=3 you got the following warning:
(WW) Error generated on context 0x5578fce2a280, code 0xa004,
"Deleting in-use effect slot 1"
Thanks for openal-soft's KittyCat for pointing this out!
For some reason sounds were only updated/started about every 100ms,
which could lead to delays of up to around 100ms after a sound gets
started (with idSoundEmitterLocal::StartSound()) until OpenAL is finally
told to play the sound.
Also, the actual delay drifted over time between 1ms and 100ms, as the
sound ticks weren't a fixed multiple of the (16ms) gameticks - and the
sound updates didn't even happen at the regular 92-94ms intervals they
should because they run in the async thread which only updates every
16ms...
Because of this, the machine gun and other rapid firing weapons sounded
like they shot in bursts or left out shots occasionally, even though
they don't.
Anyway, now sound is updated every 16ms in the async thread so delays
are <= 16ms and hopefully less noticeable.
You can still get the old behavior with com_asyncSound 2 if you want.
If the main sound in a shader was a .wav
(soundShader->entries[0]->hardwareBuffer == true), only that sound was
played (and looped with AL_LOOPING), even if a leadin was configured.
If the main sound was an .ogg it worked.
Not it should always work.
so even with many loud sounds the overall volume isn't reduced by
OpenAL - apparently OpenAL scales down all sounds temporarily if the
mixed result would be too loud or sth like that.
Just sending all sounds to OpenAL with a lower volume prevents that from
happening (just set your system speaker volume a bit higher if needed).
This problem was especially noticable when shooting at metal walls with
the shotgun (each pellet produces an impact sound so it gets kinda loud)
Set AL_LOWPASS_GAIN like EAX did under the hood.
Set the same filter via AL_DIRECT_FILTER on sources.
This should bring the overall sfx closer to EAX:
<kaan_> it sounds awesome
All infos provided by KittyCat from #openal.
First attempt at porting the EAX reverb code to EFX.
This only works when the ALC_EXT_EFX extension is supported by
the OpenAL vendor (which is not the case for the OSX supplied
framework, use OpenAL soft instead).
The current stable version of OpenAL Soft (v1.13 as of this
writing) can barely handle this additional workload, current
master is highly recommended when using this feature.
Don't include the lazy precompiled.h everywhere, only what's
required for the compilation unit.
platform.h needs to be included instead to provide all essential
defines and types.
All includes use the relative path to the neo or the game
specific root.
Move all idlib related includes from idlib/Lib.h to precompiled.h.
precompiled.h still exists for the MFC stuff in tools/.
Add some missing header guards.
Use the CVar s_numberOfSpeakers for that, its already stored
in there.
Add the same (!= 2 && !=6) check as in the audio backends since
the mixer is limited to these 2 values.
