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authorChris Robinson <[email protected]>2018-11-17 07:08:41 -0800
committerChris Robinson <[email protected]>2018-11-17 07:08:41 -0800
commit13478126cb7d41e8f6efebf020fb5a387c303f2d (patch)
tree5a37eaab19e25546df413209eab0ee41b6763d6d /Alc/effects/compressor.c
parent93d96ced9cef7200b04dbfec51325a3c9c55af19 (diff)
Convert the remaining effects to C++
Diffstat (limited to 'Alc/effects/compressor.c')
-rw-r--r--Alc/effects/compressor.c243
1 files changed, 0 insertions, 243 deletions
diff --git a/Alc/effects/compressor.c b/Alc/effects/compressor.c
deleted file mode 100644
index d9b9f1e0..00000000
--- a/Alc/effects/compressor.c
+++ /dev/null
@@ -1,243 +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 <stdlib.h>
-
-#include "config.h"
-#include "alError.h"
-#include "alMain.h"
-#include "alAuxEffectSlot.h"
-#include "alu.h"
-
-
-#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 */
-
-
-typedef struct ALcompressorState {
- DERIVE_FROM_TYPE(ALeffectState);
-
- /* Effect gains for each channel */
- ALfloat Gain[MAX_EFFECT_CHANNELS][MAX_OUTPUT_CHANNELS];
-
- /* Effect parameters */
- ALboolean Enabled;
- ALfloat AttackMult;
- ALfloat ReleaseMult;
- ALfloat EnvFollower;
-} ALcompressorState;
-
-static ALvoid ALcompressorState_Destruct(ALcompressorState *state);
-static ALboolean ALcompressorState_deviceUpdate(ALcompressorState *state, ALCdevice *device);
-static ALvoid ALcompressorState_update(ALcompressorState *state, const ALCcontext *context, const ALeffectslot *slot, const ALeffectProps *props);
-static ALvoid ALcompressorState_process(ALcompressorState *state, ALsizei SamplesToDo, const ALfloat (*RESTRICT SamplesIn)[BUFFERSIZE], ALfloat (*RESTRICT SamplesOut)[BUFFERSIZE], ALsizei NumChannels);
-DECLARE_DEFAULT_ALLOCATORS(ALcompressorState)
-
-DEFINE_ALEFFECTSTATE_VTABLE(ALcompressorState);
-
-
-static void ALcompressorState_Construct(ALcompressorState *state)
-{
- ALeffectState_Construct(STATIC_CAST(ALeffectState, state));
- SET_VTABLE2(ALcompressorState, ALeffectState, state);
-
- state->Enabled = AL_TRUE;
- state->AttackMult = 1.0f;
- state->ReleaseMult = 1.0f;
- state->EnvFollower = 1.0f;
-}
-
-static ALvoid ALcompressorState_Destruct(ALcompressorState *state)
-{
- ALeffectState_Destruct(STATIC_CAST(ALeffectState,state));
-}
-
-static ALboolean ALcompressorState_deviceUpdate(ALcompressorState *state, ALCdevice *device)
-{
- /* Number of samples to do a full attack and release (non-integer sample
- * counts are okay).
- */
- const ALfloat attackCount = (ALfloat)device->Frequency * ATTACK_TIME;
- const ALfloat releaseCount = (ALfloat)device->Frequency * RELEASE_TIME;
-
- /* Calculate per-sample multipliers to attack and release at the desired
- * rates.
- */
- state->AttackMult = powf(AMP_ENVELOPE_MAX/AMP_ENVELOPE_MIN, 1.0f/attackCount);
- state->ReleaseMult = powf(AMP_ENVELOPE_MIN/AMP_ENVELOPE_MAX, 1.0f/releaseCount);
-
- return AL_TRUE;
-}
-
-static ALvoid ALcompressorState_update(ALcompressorState *state, const ALCcontext *context, const ALeffectslot *slot, const ALeffectProps *props)
-{
- const ALCdevice *device = context->Device;
- ALuint i;
-
- state->Enabled = props->Compressor.OnOff;
-
- STATIC_CAST(ALeffectState,state)->OutBuffer = device->FOAOut.Buffer;
- STATIC_CAST(ALeffectState,state)->OutChannels = device->FOAOut.NumChannels;
- for(i = 0;i < 4;i++)
- ComputePanGains(&device->FOAOut, IdentityMatrixf.m[i], slot->Params.Gain, state->Gain[i]);
-}
-
-static ALvoid ALcompressorState_process(ALcompressorState *state, ALsizei SamplesToDo, const ALfloat (*RESTRICT SamplesIn)[BUFFERSIZE], ALfloat (*RESTRICT SamplesOut)[BUFFERSIZE], ALsizei NumChannels)
-{
- ALsizei i, j, k;
- ALsizei base;
-
- for(base = 0;base < SamplesToDo;)
- {
- ALfloat gains[256];
- ALsizei td = mini(256, SamplesToDo-base);
- ALfloat env = state->EnvFollower;
-
- /* Generate the per-sample gains from the signal envelope. */
- if(state->Enabled)
- {
- for(i = 0;i < td;++i)
- {
- /* Clamp the absolute amplitude to the defined envelope limits,
- * then attack or release the envelope to reach it.
- */
- ALfloat amplitude = clampf(fabsf(SamplesIn[0][base+i]),
- AMP_ENVELOPE_MIN, AMP_ENVELOPE_MAX);
- if(amplitude > env)
- env = minf(env*state->AttackMult, amplitude);
- else if(amplitude < env)
- env = maxf(env*state->ReleaseMult, 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(i = 0;i < td;++i)
- {
- ALfloat amplitude = 1.0f;
- if(amplitude > env)
- env = minf(env*state->AttackMult, amplitude);
- else if(amplitude < env)
- env = maxf(env*state->ReleaseMult, amplitude);
-
- gains[i] = 1.0f / env;
- }
- }
- state->EnvFollower = env;
-
- /* Now compress the signal amplitude to output. */
- for(j = 0;j < MAX_EFFECT_CHANNELS;j++)
- {
- for(k = 0;k < NumChannels;k++)
- {
- ALfloat gain = state->Gain[j][k];
- if(!(fabsf(gain) > GAIN_SILENCE_THRESHOLD))
- continue;
-
- for(i = 0;i < td;i++)
- SamplesOut[k][base+i] += SamplesIn[j][base+i] * gains[i] * gain;
- }
- }
-
- base += td;
- }
-}
-
-
-typedef struct CompressorStateFactory {
- DERIVE_FROM_TYPE(EffectStateFactory);
-} CompressorStateFactory;
-
-static ALeffectState *CompressorStateFactory_create(CompressorStateFactory *UNUSED(factory))
-{
- ALcompressorState *state;
-
- NEW_OBJ0(state, ALcompressorState)();
- if(!state) return NULL;
-
- return STATIC_CAST(ALeffectState, state);
-}
-
-DEFINE_EFFECTSTATEFACTORY_VTABLE(CompressorStateFactory);
-
-EffectStateFactory *CompressorStateFactory_getFactory(void)
-{
- static CompressorStateFactory CompressorFactory = { { GET_VTABLE2(CompressorStateFactory, EffectStateFactory) } };
-
- return STATIC_CAST(EffectStateFactory, &CompressorFactory);
-}
-
-
-void ALcompressor_setParami(ALeffect *effect, ALCcontext *context, ALenum param, ALint val)
-{
- ALeffectProps *props = &effect->Props;
- 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 ALcompressor_setParamiv(ALeffect *effect, ALCcontext *context, ALenum param, const ALint *vals)
-{ ALcompressor_setParami(effect, context, param, vals[0]); }
-void ALcompressor_setParamf(ALeffect *UNUSED(effect), ALCcontext *context, ALenum param, ALfloat UNUSED(val))
-{ alSetError(context, AL_INVALID_ENUM, "Invalid compressor float property 0x%04x", param); }
-void ALcompressor_setParamfv(ALeffect *UNUSED(effect), ALCcontext *context, ALenum param, const ALfloat *UNUSED(vals))
-{ alSetError(context, AL_INVALID_ENUM, "Invalid compressor float-vector property 0x%04x", param); }
-
-void ALcompressor_getParami(const ALeffect *effect, ALCcontext *context, ALenum param, ALint *val)
-{
- const ALeffectProps *props = &effect->Props;
- 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 ALcompressor_getParamiv(const ALeffect *effect, ALCcontext *context, ALenum param, ALint *vals)
-{ ALcompressor_getParami(effect, context, param, vals); }
-void ALcompressor_getParamf(const ALeffect *UNUSED(effect), ALCcontext *context, ALenum param, ALfloat *UNUSED(val))
-{ alSetError(context, AL_INVALID_ENUM, "Invalid compressor float property 0x%04x", param); }
-void ALcompressor_getParamfv(const ALeffect *UNUSED(effect), ALCcontext *context, ALenum param, ALfloat *UNUSED(vals))
-{ alSetError(context, AL_INVALID_ENUM, "Invalid compressor float-vector property 0x%04x", param); }
-
-DEFINE_ALEFFECT_VTABLE(ALcompressor);