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-rw-r--r--Alc/effects/compressor.cpp222
1 files changed, 0 insertions, 222 deletions
diff --git a/Alc/effects/compressor.cpp b/Alc/effects/compressor.cpp
deleted file mode 100644
index 4a487097..00000000
--- a/Alc/effects/compressor.cpp
+++ /dev/null
@@ -1,222 +0,0 @@
-/**
- * OpenAL cross platform audio library
- * Copyright (C) 2013 by Anis A. Hireche
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public
- * License along with this library; if not, write to the
- * Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
- * Or go to http://www.gnu.org/copyleft/lgpl.html
- */
-
-#include "config.h"
-
-#include <cstdlib>
-
-#include "alcmain.h"
-#include "alcontext.h"
-#include "alu.h"
-#include "alAuxEffectSlot.h"
-#include "alError.h"
-#include "vecmat.h"
-
-
-namespace {
-
-#define AMP_ENVELOPE_MIN 0.5f
-#define AMP_ENVELOPE_MAX 2.0f
-
-#define ATTACK_TIME 0.1f /* 100ms to rise from min to max */
-#define RELEASE_TIME 0.2f /* 200ms to drop from max to min */
-
-
-struct CompressorState final : public EffectState {
- /* Effect gains for each channel */
- ALfloat mGain[MAX_AMBI_CHANNELS][MAX_OUTPUT_CHANNELS]{};
-
- /* Effect parameters */
- ALboolean mEnabled{AL_TRUE};
- ALfloat mAttackMult{1.0f};
- ALfloat mReleaseMult{1.0f};
- ALfloat mEnvFollower{1.0f};
-
-
- ALboolean deviceUpdate(const ALCdevice *device) override;
- void update(const ALCcontext *context, const ALeffectslot *slot, const EffectProps *props, const EffectTarget target) override;
- void process(const ALsizei samplesToDo, const FloatBufferLine *RESTRICT samplesIn, const ALsizei numInput, const al::span<FloatBufferLine> samplesOut) override;
-
- DEF_NEWDEL(CompressorState)
-};
-
-ALboolean CompressorState::deviceUpdate(const ALCdevice *device)
-{
- /* Number of samples to do a full attack and release (non-integer sample
- * counts are okay).
- */
- const ALfloat attackCount = static_cast<ALfloat>(device->Frequency) * ATTACK_TIME;
- const ALfloat releaseCount = static_cast<ALfloat>(device->Frequency) * RELEASE_TIME;
-
- /* Calculate per-sample multipliers to attack and release at the desired
- * rates.
- */
- mAttackMult = std::pow(AMP_ENVELOPE_MAX/AMP_ENVELOPE_MIN, 1.0f/attackCount);
- mReleaseMult = std::pow(AMP_ENVELOPE_MIN/AMP_ENVELOPE_MAX, 1.0f/releaseCount);
-
- return AL_TRUE;
-}
-
-void CompressorState::update(const ALCcontext*, const ALeffectslot *slot, const EffectProps *props, const EffectTarget target)
-{
- mEnabled = props->Compressor.OnOff;
-
- mOutTarget = target.Main->Buffer;
- for(size_t i{0u};i < slot->Wet.Buffer.size();++i)
- {
- auto coeffs = GetAmbiIdentityRow(i);
- ComputePanGains(target.Main, coeffs.data(), slot->Params.Gain, mGain[i]);
- }
-}
-
-void CompressorState::process(const ALsizei samplesToDo, const FloatBufferLine *RESTRICT samplesIn, const ALsizei numInput, const al::span<FloatBufferLine> samplesOut)
-{
- for(ALsizei base{0};base < samplesToDo;)
- {
- ALfloat gains[256];
- const ALsizei td{mini(256, samplesToDo-base)};
-
- /* Generate the per-sample gains from the signal envelope. */
- ALfloat env{mEnvFollower};
- if(mEnabled)
- {
- for(ALsizei i{0};i < td;++i)
- {
- /* Clamp the absolute amplitude to the defined envelope limits,
- * then attack or release the envelope to reach it.
- */
- const ALfloat amplitude{clampf(std::fabs(samplesIn[0][base+i]), AMP_ENVELOPE_MIN,
- AMP_ENVELOPE_MAX)};
- if(amplitude > env)
- env = minf(env*mAttackMult, amplitude);
- else if(amplitude < env)
- env = maxf(env*mReleaseMult, amplitude);
-
- /* Apply the reciprocal of the envelope to normalize the volume
- * (compress the dynamic range).
- */
- gains[i] = 1.0f / env;
- }
- }
- else
- {
- /* Same as above, except the amplitude is forced to 1. This helps
- * ensure smooth gain changes when the compressor is turned on and
- * off.
- */
- for(ALsizei i{0};i < td;++i)
- {
- const ALfloat amplitude{1.0f};
- if(amplitude > env)
- env = minf(env*mAttackMult, amplitude);
- else if(amplitude < env)
- env = maxf(env*mReleaseMult, amplitude);
-
- gains[i] = 1.0f / env;
- }
- }
- mEnvFollower = env;
-
- /* Now compress the signal amplitude to output. */
- ASSUME(numInput > 0);
- for(ALsizei j{0};j < numInput;j++)
- {
- const ALfloat *outgains{mGain[j]};
- for(FloatBufferLine &output : samplesOut)
- {
- const ALfloat gain{*(outgains++)};
- if(!(std::fabs(gain) > GAIN_SILENCE_THRESHOLD))
- continue;
-
- for(ALsizei i{0};i < td;i++)
- output[base+i] += samplesIn[j][base+i] * gains[i] * gain;
- }
- }
-
- base += td;
- }
-}
-
-
-void Compressor_setParami(EffectProps *props, ALCcontext *context, ALenum param, ALint val)
-{
- switch(param)
- {
- case AL_COMPRESSOR_ONOFF:
- if(!(val >= AL_COMPRESSOR_MIN_ONOFF && val <= AL_COMPRESSOR_MAX_ONOFF))
- SETERR_RETURN(context, AL_INVALID_VALUE,, "Compressor state out of range");
- props->Compressor.OnOff = val;
- break;
-
- default:
- alSetError(context, AL_INVALID_ENUM, "Invalid compressor integer property 0x%04x",
- param);
- }
-}
-void Compressor_setParamiv(EffectProps *props, ALCcontext *context, ALenum param, const ALint *vals)
-{ Compressor_setParami(props, context, param, vals[0]); }
-void Compressor_setParamf(EffectProps*, ALCcontext *context, ALenum param, ALfloat)
-{ alSetError(context, AL_INVALID_ENUM, "Invalid compressor float property 0x%04x", param); }
-void Compressor_setParamfv(EffectProps*, ALCcontext *context, ALenum param, const ALfloat*)
-{ alSetError(context, AL_INVALID_ENUM, "Invalid compressor float-vector property 0x%04x", param); }
-
-void Compressor_getParami(const EffectProps *props, ALCcontext *context, ALenum param, ALint *val)
-{
- switch(param)
- {
- case AL_COMPRESSOR_ONOFF:
- *val = props->Compressor.OnOff;
- break;
-
- default:
- alSetError(context, AL_INVALID_ENUM, "Invalid compressor integer property 0x%04x",
- param);
- }
-}
-void Compressor_getParamiv(const EffectProps *props, ALCcontext *context, ALenum param, ALint *vals)
-{ Compressor_getParami(props, context, param, vals); }
-void Compressor_getParamf(const EffectProps*, ALCcontext *context, ALenum param, ALfloat*)
-{ alSetError(context, AL_INVALID_ENUM, "Invalid compressor float property 0x%04x", param); }
-void Compressor_getParamfv(const EffectProps*, ALCcontext *context, ALenum param, ALfloat*)
-{ alSetError(context, AL_INVALID_ENUM, "Invalid compressor float-vector property 0x%04x", param); }
-
-DEFINE_ALEFFECT_VTABLE(Compressor);
-
-
-struct CompressorStateFactory final : public EffectStateFactory {
- EffectState *create() override { return new CompressorState{}; }
- EffectProps getDefaultProps() const noexcept override;
- const EffectVtable *getEffectVtable() const noexcept override { return &Compressor_vtable; }
-};
-
-EffectProps CompressorStateFactory::getDefaultProps() const noexcept
-{
- EffectProps props{};
- props.Compressor.OnOff = AL_COMPRESSOR_DEFAULT_ONOFF;
- return props;
-}
-
-} // namespace
-
-EffectStateFactory *CompressorStateFactory_getFactory()
-{
- static CompressorStateFactory CompressorFactory{};
- return &CompressorFactory;
-}
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