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Apply high-pass source filters as needed

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This commit is contained in:
Chris Robinson
2014-05-17 07:54:25 -07:00
parent 3a26ebef0b
commit 82dd2d875e
5 changed files with 88 additions and 10 deletions
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Alc/ALu.c
+48 -5
View File
@@ -281,9 +281,10 @@ ALvoid CalcNonAttnSourceParams(ALactivesource *src, const ALCcontext *ALContext)
ALfloat SourceVolume,ListenerGain,MinVolume,MaxVolume;
ALbufferlistitem *BufferListItem;
enum FmtChannels Channels;
ALfloat DryGain, DryGainHF;
ALfloat DryGain, DryGainHF, DryGainLF;
ALfloat WetGain[MAX_SENDS];
ALfloat WetGainHF[MAX_SENDS];
ALfloat WetGainLF[MAX_SENDS];
ALint NumSends, Frequency;
const struct ChanMap *chans = NULL;
enum Resampler Resampler;
@@ -349,11 +350,13 @@ ALvoid CalcNonAttnSourceParams(ALactivesource *src, const ALCcontext *ALContext)
DryGain = clampf(SourceVolume, MinVolume, MaxVolume);
DryGain *= ALSource->Direct.Gain * ListenerGain;
DryGainHF = ALSource->Direct.GainHF;
DryGainLF = ALSource->Direct.GainLF;
for(i = 0;i < NumSends;i++)
{
WetGain[i] = clampf(SourceVolume, MinVolume, MaxVolume);
WetGain[i] *= ALSource->Send[i].Gain * ListenerGain;
WetGainHF[i] = ALSource->Send[i].GainHF;
WetGainLF[i] = ALSource->Send[i].GainLF;
}
switch(Channels)
@@ -582,27 +585,43 @@ ALvoid CalcNonAttnSourceParams(ALactivesource *src, const ALCcontext *ALContext)
{
ALfloat gainhf = maxf(0.01f, DryGainHF);
ALfloat gainlf = maxf(0.01f, DryGainLF);
ALfloat hfscale = ALSource->Direct.HFReference / Frequency;
ALfloat lfscale = ALSource->Direct.LFReference / Frequency;
for(c = 0;c < num_channels;c++)
{
src->Direct.Filters[c] = (gainhf != 1.0f) ? AF_LowPass : AF_None;
src->Direct.Filters[c] = (gainhf != 1.0f && gainlf != 1.0f) ? AF_BandPass :
(gainhf != 1.0f) ? AF_LowPass :
(gainlf != 1.0f) ? AF_HighPass : AF_None;
ALfilterState_setParams(
&src->Direct.LpFilter[c], ALfilterType_HighShelf, gainhf,
hfscale, 0.0f
);
ALfilterState_setParams(
&src->Direct.HpFilter[c], ALfilterType_LowShelf, gainlf,
lfscale, 0.0f
);
}
}
for(i = 0;i < NumSends;i++)
{
ALfloat gainhf = maxf(0.01f, WetGainHF[i]);
ALfloat gainlf = maxf(0.01f, WetGainLF[i]);
ALfloat hfscale = ALSource->Send[i].HFReference / Frequency;
ALfloat lfscale = ALSource->Send[i].LFReference / Frequency;
for(c = 0;c < num_channels;c++)
{
src->Send[i].Filters[c] = (gainhf != 1.0f) ? AF_LowPass : AF_None;
src->Send[i].Filters[c] = (gainhf != 1.0f && gainlf != 1.0f) ? AF_BandPass :
(gainhf != 1.0f) ? AF_LowPass :
(gainlf != 1.0f) ? AF_HighPass : AF_None;
ALfilterState_setParams(
&src->Send[i].LpFilter[c], ALfilterType_HighShelf, gainhf,
hfscale, 0.0f
);
ALfilterState_setParams(
&src->Send[i].HpFilter[c], ALfilterType_LowShelf, gainlf,
lfscale, 0.0f
);
}
}
}
@@ -627,9 +646,11 @@ ALvoid CalcSourceParams(ALactivesource *src, const ALCcontext *ALContext)
ALfloat DecayDistance[MAX_SENDS];
ALfloat DryGain;
ALfloat DryGainHF;
ALfloat DryGainLF;
ALboolean DryGainHFAuto;
ALfloat WetGain[MAX_SENDS];
ALfloat WetGainHF[MAX_SENDS];
ALfloat WetGainLF[MAX_SENDS];
ALboolean WetGainAuto;
ALboolean WetGainHFAuto;
enum Resampler Resampler;
@@ -639,8 +660,12 @@ ALvoid CalcSourceParams(ALactivesource *src, const ALCcontext *ALContext)
ALint i, j;
DryGainHF = 1.0f;
DryGainLF = 1.0f;
for(i = 0;i < MAX_SENDS;i++)
{
WetGainHF[i] = 1.0f;
WetGainLF[i] = 1.0f;
}
/* Get context/device properties */
DopplerFactor = ALContext->DopplerFactor * ALSource->DopplerFactor;
@@ -885,10 +910,12 @@ ALvoid CalcSourceParams(ALactivesource *src, const ALCcontext *ALContext)
/* Apply gain and frequency filters */
DryGain *= ALSource->Direct.Gain * ListenerGain;
DryGainHF *= ALSource->Direct.GainHF;
DryGainLF *= ALSource->Direct.GainLF;
for(i = 0;i < NumSends;i++)
{
WetGain[i] *= ALSource->Send[i].Gain * ListenerGain;
WetGainHF[i] *= ALSource->Send[i].GainHF;
WetGainLF[i] *= ALSource->Send[i].GainLF;
}
/* Calculate velocity-based doppler effect */
@@ -1089,22 +1116,38 @@ ALvoid CalcSourceParams(ALactivesource *src, const ALCcontext *ALContext)
{
ALfloat gainhf = maxf(0.01f, DryGainHF);
ALfloat gainlf = maxf(0.01f, DryGainLF);
ALfloat hfscale = ALSource->Direct.HFReference / Frequency;
src->Direct.Filters[0] = (gainhf != 1.0f) ? AF_LowPass : AF_None;
ALfloat lfscale = ALSource->Direct.LFReference / Frequency;
src->Direct.Filters[0] = (gainhf != 1.0f && gainlf != 1.0f) ? AF_BandPass :
(gainhf != 1.0f) ? AF_LowPass :
(gainlf != 1.0f) ? AF_HighPass : AF_None;
ALfilterState_setParams(
&src->Direct.LpFilter[0], ALfilterType_HighShelf, gainhf,
hfscale, 0.0f
);
ALfilterState_setParams(
&src->Direct.HpFilter[0], ALfilterType_LowShelf, gainlf,
lfscale, 0.0f
);
}
for(i = 0;i < NumSends;i++)
{
ALfloat gainhf = maxf(0.01f, WetGainHF[i]);
ALfloat gainlf = maxf(0.01f, WetGainLF[i]);
ALfloat hfscale = ALSource->Send[i].HFReference / Frequency;
src->Direct.Filters[0] = (gainhf != 1.0f) ? AF_LowPass : AF_None;
ALfloat lfscale = ALSource->Send[i].LFReference / Frequency;
src->Direct.Filters[0] = (gainhf != 1.0f && gainlf != 1.0f) ? AF_BandPass :
(gainhf != 1.0f) ? AF_LowPass :
(gainlf != 1.0f) ? AF_HighPass : AF_None;
ALfilterState_setParams(
&src->Send[i].LpFilter[0], ALfilterType_HighShelf, gainhf,
hfscale, 0.0f
);
ALfilterState_setParams(
&src->Send[i].HpFilter[0], ALfilterType_LowShelf, gainlf,
lfscale, 0.0f
);
}
}
Alc/mixer.c
+20 -5
View File
@@ -84,7 +84,8 @@ static void SilenceData(ALfloat *dst, ALuint samples)
}
static void DoFilters(ALfilterState *lpfilter, ALfloat *restrict dst, const ALfloat *restrict src,
static void DoFilters(ALfilterState *lpfilter, ALfilterState *hpfilter,
ALfloat *restrict dst, const ALfloat *restrict src,
ALuint numsamples, enum ActiveFilters type)
{
ALuint i;
@@ -98,6 +99,18 @@ static void DoFilters(ALfilterState *lpfilter, ALfloat *restrict dst, const ALfl
for(i = 0;i < numsamples;i++)
dst[i] = ALfilterState_processSingle(lpfilter, src[i]);
break;
case AF_HighPass:
for(i = 0;i < numsamples;i++)
dst[i] = ALfilterState_processSingle(hpfilter, src[i]);
break;
case AF_BandPass:
for(i = 0;i < numsamples;i++)
dst[i] = ALfilterState_processSingle(hpfilter,
ALfilterState_processSingle(lpfilter, src[i])
);
break;
}
}
@@ -332,8 +345,9 @@ ALvoid MixSource(ALactivesource *src, ALCdevice *Device, ALuint SamplesToDo)
{
DirectParams *directparms = &src->Direct;
DoFilters(&directparms->LpFilter[chan], SrcData, ResampledData,
DstBufferSize, directparms->Filters[chan]);
DoFilters(&directparms->LpFilter[chan], &directparms->HpFilter[chan],
SrcData, ResampledData, DstBufferSize,
directparms->Filters[chan]);
src->DryMix(directparms, SrcData, chan, OutPos, DstBufferSize);
}
@@ -343,8 +357,9 @@ ALvoid MixSource(ALactivesource *src, ALCdevice *Device, ALuint SamplesToDo)
if(!sendparms->OutBuffer)
continue;
DoFilters(&sendparms->LpFilter[chan], SrcData, ResampledData,
DstBufferSize, sendparms->Filters[chan]);
DoFilters(&sendparms->LpFilter[chan], &sendparms->HpFilter[chan],
SrcData, ResampledData, DstBufferSize,
sendparms->Filters[chan]);
src->WetMix(sendparms, SrcData, OutPos, DstBufferSize);
}
}
OpenAL32/Include/alSource.h
+4
View File
@@ -109,12 +109,16 @@ typedef struct ALsource {
ALfloat Gain;
ALfloat GainHF;
ALfloat HFReference;
ALfloat GainLF;
ALfloat LFReference;
} Direct;
struct {
struct ALeffectslot *Slot;
ALfloat Gain;
ALfloat GainHF;
ALfloat HFReference;
ALfloat GainLF;
ALfloat LFReference;
} Send[MAX_SENDS];
/** Source needs to update its mixing parameters. */
OpenAL32/Include/alu.h
+4
View File
@@ -42,6 +42,8 @@ extern "C" {
enum ActiveFilters {
AF_None = 0,
AF_LowPass = 1,
AF_HighPass = 2,
AF_BandPass = AF_LowPass | AF_HighPass
};
typedef struct HrtfState {
@@ -61,6 +63,7 @@ typedef struct DirectParams {
enum ActiveFilters Filters[MAX_INPUT_CHANNELS];
ALfilterState LpFilter[MAX_INPUT_CHANNELS];
ALfilterState HpFilter[MAX_INPUT_CHANNELS];
/* If not 'moving', gain/coefficients are set directly without fading. */
ALboolean Moving;
@@ -94,6 +97,7 @@ typedef struct SendParams {
enum ActiveFilters Filters[MAX_INPUT_CHANNELS];
ALfilterState LpFilter[MAX_INPUT_CHANNELS];
ALfilterState HpFilter[MAX_INPUT_CHANNELS];
ALboolean Moving;
ALuint Counter;
OpenAL32/alSource.c
+12
View File
@@ -666,12 +666,16 @@ static ALboolean SetSourceiv(ALsource *Source, ALCcontext *Context, SrcIntProp p
Source->Direct.Gain = 1.0f;
Source->Direct.GainHF = 1.0f;
Source->Direct.HFReference = LOWPASSFREQREF;
Source->Direct.GainLF = 1.0f;
Source->Direct.LFReference = HIGHPASSFREQREF;
}
else
{
Source->Direct.Gain = filter->Gain;
Source->Direct.GainHF = filter->GainHF;
Source->Direct.HFReference = filter->HFReference;
Source->Direct.GainLF = filter->GainLF;
Source->Direct.LFReference = filter->LFReference;
}
UnlockContext(Context);
Source->NeedsUpdate = AL_TRUE;
@@ -741,12 +745,16 @@ static ALboolean SetSourceiv(ALsource *Source, ALCcontext *Context, SrcIntProp p
Source->Send[values[1]].Gain = 1.0f;
Source->Send[values[1]].GainHF = 1.0f;
Source->Send[values[1]].HFReference = LOWPASSFREQREF;
Source->Send[values[1]].GainLF = 1.0f;
Source->Send[values[1]].LFReference = HIGHPASSFREQREF;
}
else
{
Source->Send[values[1]].Gain = filter->Gain;
Source->Send[values[1]].GainHF = filter->GainHF;
Source->Send[values[1]].HFReference = filter->HFReference;
Source->Send[values[1]].GainLF = filter->GainLF;
Source->Send[values[1]].LFReference = filter->LFReference;
}
Source->NeedsUpdate = AL_TRUE;
UnlockContext(Context);
@@ -2319,11 +2327,15 @@ static ALvoid InitSourceParams(ALsource *Source)
Source->Direct.Gain = 1.0f;
Source->Direct.GainHF = 1.0f;
Source->Direct.HFReference = LOWPASSFREQREF;
Source->Direct.GainLF = 1.0f;
Source->Direct.LFReference = HIGHPASSFREQREF;
for(i = 0;i < MAX_SENDS;i++)
{
Source->Send[i].Gain = 1.0f;
Source->Send[i].GainHF = 1.0f;
Source->Send[i].HFReference = LOWPASSFREQREF;
Source->Send[i].GainLF = 1.0f;
Source->Send[i].LFReference = HIGHPASSFREQREF;
}
Source->NeedsUpdate = AL_TRUE;