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Remove the fallback for lack of AL_EXT_SOURCE_RADIUS 

It's been available in OpenAL Soft for years and the fallback method wasn't very good.
This commit is contained in:
Chris Robinson 2020-01-29 08:14:49 -08:00 committed by Christoph Oelckers
parent c58e98cc7f
commit 42fd84a09d
1 changed files with 33 additions and 68 deletions
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101
src/sound/backend/oalsound.cpp
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@ -1518,28 +1518,38 @@ FISoundChannel *OpenALSoundRenderer::StartSound3D(SoundHandle sfx, SoundListener
alSourcef(source, AL_MAX_DISTANCE, 100000.f);
alSourcef(source, AL_ROLLOFF_FACTOR, 1.f);
FVector3 dir = pos - listener->position;
if(dir.DoesNotApproximatelyEqual(FVector3(0.f, 0.f, 0.f)))
{
float gain = GetRolloff(rolloff, sqrtf(dist_sqr) * distscale);
dir.MakeResize((gain > 0.00001f) ? 1.f/gain : 100000.f);
}
if(AL.EXT_SOURCE_RADIUS)
{
/* Since the OpenAL distance is decoupled from the sound's distance, get the OpenAL
* distance that corresponds to the area radius. */
float gain = GetRolloff(rolloff, AREA_SOUND_RADIUS);
alSourcef(source, AL_SOURCE_RADIUS, (chanflags&SNDF_AREA) ?
// Clamp in case the max distance is <= the area radius
1.f/std::max<float>(GetRolloff(rolloff, AREA_SOUND_RADIUS), 0.00001f) : 0.f
((gain > 0.00001f) ? 1.f/gain : 100000.f) : 0.f
);
}
else if((chanflags&SNDF_AREA) && dist_sqr < AREA_SOUND_RADIUS*AREA_SOUND_RADIUS)
if(dist_sqr < (0.0004f*0.0004f))
{
FVector3 amb(0.f, !(dir.Y>=0.f) ? -1.f : 1.f, 0.f);
float a = sqrtf(dist_sqr) / AREA_SOUND_RADIUS;
dir = amb + (dir-amb)*a;
// Head relative
alSourcei(source, AL_SOURCE_RELATIVE, AL_TRUE);
alSource3f(source, AL_POSITION, 0.f, 0.f, 0.f);
}
dir += listener->position;
else
{
float gain = GetRolloff(rolloff, sqrtf(dist_sqr) * distscale);
FVector3 dir = pos - listener->position;
dir.MakeResize((gain > 0.00001f) ? 1.f/gain : 100000.f);
dir += listener->position;
alSourcei(source, AL_SOURCE_RELATIVE, AL_FALSE);
alSource3f(source, AL_POSITION, dir[0], dir[1], -dir[2]);
}
}
else
{
if(AL.EXT_SOURCE_RADIUS)
alSourcef(source, AL_SOURCE_RADIUS, (chanflags&SNDF_AREA) ? AREA_SOUND_RADIUS : 0.f);
if(dist_sqr < (0.0004f*0.0004f))
{
@ -1550,35 +1560,7 @@ FISoundChannel *OpenALSoundRenderer::StartSound3D(SoundHandle sfx, SoundListener
else
{
alSourcei(source, AL_SOURCE_RELATIVE, AL_FALSE);
alSource3f(source, AL_POSITION, dir[0], dir[1], -dir[2]);
}
}
else
{
FVector3 dir = pos;
if(AL.EXT_SOURCE_RADIUS)
alSourcef(source, AL_SOURCE_RADIUS, (chanflags&SNDF_AREA) ? AREA_SOUND_RADIUS : 0.f);
else if((chanflags&SNDF_AREA) && dist_sqr < AREA_SOUND_RADIUS*AREA_SOUND_RADIUS)
{
dir -= listener->position;
float mindist = rolloff->MinDistance/distscale;
FVector3 amb(0.f, !(dir.Y>=0.f) ? -mindist : mindist, 0.f);
float a = sqrtf(dist_sqr) / AREA_SOUND_RADIUS;
dir = amb + (dir-amb)*a;
dir += listener->position;
}
if(dist_sqr < (0.0004f*0.0004f))
{
// Head relative
alSourcei(source, AL_SOURCE_RELATIVE, AL_TRUE);
alSource3f(source, AL_POSITION, 0.f, 0.f, 0.f);
}
else
{
alSourcei(source, AL_SOURCE_RELATIVE, AL_FALSE);
alSource3f(source, AL_POSITION, dir[0], dir[1], -dir[2]);
alSource3f(source, AL_POSITION, pos[0], pos[1], -pos[2]);
}
}
alSource3f(source, AL_VELOCITY, vel[0], vel[1], -vel[2]);
@ -1842,43 +1824,26 @@ void OpenALSoundRenderer::UpdateSoundParams3D(SoundListener *listener, FISoundCh
return;
FVector3 dir = pos - listener->position;
chan->DistanceSqr = (float)dir.LengthSquared();
if(chan->ManualRolloff)
{
if(!AL.EXT_SOURCE_RADIUS && areasound &&
chan->DistanceSqr < AREA_SOUND_RADIUS*AREA_SOUND_RADIUS)
{
FVector3 amb(0.f, !(dir.Y>=0.f) ? -1.f : 1.f, 0.f);
float a = sqrtf(chan->DistanceSqr) / AREA_SOUND_RADIUS;
dir = amb + (dir-amb)*a;
}
if(dir.DoesNotApproximatelyEqual(FVector3(0.f, 0.f, 0.f)))
{
float gain = GetRolloff(&chan->Rolloff, sqrtf(chan->DistanceSqr)*chan->DistanceScale);
dir.MakeResize((gain > 0.00001f) ? 1.f/gain : 100000.f);
}
}
else if(!AL.EXT_SOURCE_RADIUS && areasound &&
chan->DistanceSqr < AREA_SOUND_RADIUS*AREA_SOUND_RADIUS)
{
float mindist = chan->Rolloff.MinDistance / chan->DistanceScale;
FVector3 amb(0.f, !(dir.Y>=0.f) ? -mindist : mindist, 0.f);
float a = sqrtf(chan->DistanceSqr) / AREA_SOUND_RADIUS;
dir = amb + (dir-amb)*a;
}
dir += listener->position;
float dist_sqr = (float)dir.LengthSquared();
chan->DistanceSqr = dist_sqr;
alDeferUpdatesSOFT();
ALuint source = GET_PTRID(chan->SysChannel);
if(chan->DistanceSqr < (0.0004f*0.0004f))
if(dist_sqr < (0.0004f*0.0004f))
{
alSourcei(source, AL_SOURCE_RELATIVE, AL_TRUE);
alSource3f(source, AL_POSITION, 0.f, 0.f, 0.f);
}
else
{
if(chan->ManualRolloff)
{
float gain = GetRolloff(&chan->Rolloff, sqrtf(dist_sqr)*chan->DistanceScale);
dir.MakeResize((gain > 0.00001f) ? 1.f/gain : 100000.f);
}
dir += listener->position;
alSourcei(source, AL_SOURCE_RELATIVE, AL_FALSE);
alSource3f(source, AL_POSITION, dir[0], dir[1], -dir[2]);
}