Convert the dedicated, distortion, echo, and equalizer to C++

1 files changed, 0 insertions, 286 deletions

diff --git a/Alc/effects/distortion.c b/Alc/effects/distortion.c
deleted file mode 100644
index f2a70bff..00000000
--- a/Alc/effects/distortion.c
+++ /dev/null
@@ -1,286 +0,0 @@
-/**
- * OpenAL cross platform audio library
- * Copyright (C) 2013 by Mike Gorchak
- * 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 <math.h>
-#include <stdlib.h>
-
-#include "alMain.h"
-#include "alAuxEffectSlot.h"
-#include "alError.h"
-#include "alu.h"
-#include "filters/defs.h"
-
-
-typedef struct ALdistortionState {
-    DERIVE_FROM_TYPE(ALeffectState);
-
-    /* Effect gains for each channel */
-    ALfloat Gain[MAX_OUTPUT_CHANNELS];
-
-    /* Effect parameters */
-    BiquadFilter lowpass;
-    BiquadFilter bandpass;
-    ALfloat attenuation;
-    ALfloat edge_coeff;
-
-    ALfloat Buffer[2][BUFFERSIZE];
-} ALdistortionState;
-
-static ALvoid ALdistortionState_Destruct(ALdistortionState *state);
-static ALboolean ALdistortionState_deviceUpdate(ALdistortionState *state, ALCdevice *device);
-static ALvoid ALdistortionState_update(ALdistortionState *state, const ALCcontext *context, const ALeffectslot *slot, const ALeffectProps *props);
-static ALvoid ALdistortionState_process(ALdistortionState *state, ALsizei SamplesToDo, const ALfloat (*RESTRICT SamplesIn)[BUFFERSIZE], ALfloat (*RESTRICT SamplesOut)[BUFFERSIZE], ALsizei NumChannels);
-DECLARE_DEFAULT_ALLOCATORS(ALdistortionState)
-
-DEFINE_ALEFFECTSTATE_VTABLE(ALdistortionState);
-
-
-static void ALdistortionState_Construct(ALdistortionState *state)
-{
-    ALeffectState_Construct(STATIC_CAST(ALeffectState, state));
-    SET_VTABLE2(ALdistortionState, ALeffectState, state);
-}
-
-static ALvoid ALdistortionState_Destruct(ALdistortionState *state)
-{
-    ALeffectState_Destruct(STATIC_CAST(ALeffectState,state));
-}
-
-static ALboolean ALdistortionState_deviceUpdate(ALdistortionState *state, ALCdevice *UNUSED(device))
-{
-    BiquadFilter_clear(&state->lowpass);
-    BiquadFilter_clear(&state->bandpass);
-    return AL_TRUE;
-}
-
-static ALvoid ALdistortionState_update(ALdistortionState *state, const ALCcontext *context, const ALeffectslot *slot, const ALeffectProps *props)
-{
-    const ALCdevice *device = context->Device;
-    ALfloat frequency = (ALfloat)device->Frequency;
-    ALfloat coeffs[MAX_AMBI_COEFFS];
-    ALfloat bandwidth;
-    ALfloat cutoff;
-    ALfloat edge;
-
-    /* Store waveshaper edge settings. */
-    edge = sinf(props->Distortion.Edge * (F_PI_2));
-    edge = minf(edge, 0.99f);
-    state->edge_coeff = 2.0f * edge / (1.0f-edge);
-
-    cutoff = props->Distortion.LowpassCutoff;
-    /* Bandwidth value is constant in octaves. */
-    bandwidth = (cutoff / 2.0f) / (cutoff * 0.67f);
-    /* Multiply sampling frequency by the amount of oversampling done during
-     * processing.
-     */
-    BiquadFilter_setParams(&state->lowpass, BiquadType_LowPass, 1.0f,
-        cutoff / (frequency*4.0f), calc_rcpQ_from_bandwidth(cutoff / (frequency*4.0f), bandwidth)
-    );
-
-    cutoff = props->Distortion.EQCenter;
-    /* Convert bandwidth in Hz to octaves. */
-    bandwidth = props->Distortion.EQBandwidth / (cutoff * 0.67f);
-    BiquadFilter_setParams(&state->bandpass, BiquadType_BandPass, 1.0f,
-        cutoff / (frequency*4.0f), calc_rcpQ_from_bandwidth(cutoff / (frequency*4.0f), bandwidth)
-    );
-
-    CalcAngleCoeffs(0.0f, 0.0f, 0.0f, coeffs);
-    ComputePanGains(&device->Dry, coeffs, slot->Params.Gain*props->Distortion.Gain, state->Gain);
-}
-
-static ALvoid ALdistortionState_process(ALdistortionState *state, ALsizei SamplesToDo, const ALfloat (*RESTRICT SamplesIn)[BUFFERSIZE], ALfloat (*RESTRICT SamplesOut)[BUFFERSIZE], ALsizei NumChannels)
-{
-    ALfloat (*RESTRICT buffer)[BUFFERSIZE] = state->Buffer;
-    const ALfloat fc = state->edge_coeff;
-    ALsizei base;
-    ALsizei i, k;
-
-    for(base = 0;base < SamplesToDo;)
-    {
-        /* Perform 4x oversampling to avoid aliasing. Oversampling greatly
-         * improves distortion quality and allows to implement lowpass and
-         * bandpass filters using high frequencies, at which classic IIR
-         * filters became unstable.
-         */
-        ALsizei todo = mini(BUFFERSIZE, (SamplesToDo-base) * 4);
-
-        /* Fill oversample buffer using zero stuffing. Multiply the sample by
-         * the amount of oversampling to maintain the signal's power.
-         */
-        for(i = 0;i < todo;i++)
-            buffer[0][i] = !(i&3) ? SamplesIn[0][(i>>2)+base] * 4.0f : 0.0f;
-
-        /* First step, do lowpass filtering of original signal. Additionally
-         * perform buffer interpolation and lowpass cutoff for oversampling
-         * (which is fortunately first step of distortion). So combine three
-         * operations into the one.
-         */
-        BiquadFilter_process(&state->lowpass, buffer[1], buffer[0], todo);
-
-        /* Second step, do distortion using waveshaper function to emulate
-         * signal processing during tube overdriving. Three steps of
-         * waveshaping are intended to modify waveform without boost/clipping/
-         * attenuation process.
-         */
-        for(i = 0;i < todo;i++)
-        {
-            ALfloat smp = buffer[1][i];
-
-            smp = (1.0f + fc) * smp/(1.0f + fc*fabsf(smp));
-            smp = (1.0f + fc) * smp/(1.0f + fc*fabsf(smp)) * -1.0f;
-            smp = (1.0f + fc) * smp/(1.0f + fc*fabsf(smp));
-
-            buffer[0][i] = smp;
-        }
-
-        /* Third step, do bandpass filtering of distorted signal. */
-        BiquadFilter_process(&state->bandpass, buffer[1], buffer[0], todo);
-
-        todo >>= 2;
-        for(k = 0;k < NumChannels;k++)
-        {
-            /* Fourth step, final, do attenuation and perform decimation,
-             * storing only one sample out of four.
-             */
-            ALfloat gain = state->Gain[k];
-            if(!(fabsf(gain) > GAIN_SILENCE_THRESHOLD))
-                continue;
-
-            for(i = 0;i < todo;i++)
-                SamplesOut[k][base+i] += gain * buffer[1][i*4];
-        }
-
-        base += todo;
-    }
-}
-
-
-typedef struct DistortionStateFactory {
-    DERIVE_FROM_TYPE(EffectStateFactory);
-} DistortionStateFactory;
-
-static ALeffectState *DistortionStateFactory_create(DistortionStateFactory *UNUSED(factory))
-{
-    ALdistortionState *state;
-
-    NEW_OBJ0(state, ALdistortionState)();
-    if(!state) return NULL;
-
-    return STATIC_CAST(ALeffectState, state);
-}
-
-DEFINE_EFFECTSTATEFACTORY_VTABLE(DistortionStateFactory);
-
-
-EffectStateFactory *DistortionStateFactory_getFactory(void)
-{
-    static DistortionStateFactory DistortionFactory = { { GET_VTABLE2(DistortionStateFactory, EffectStateFactory) } };
-
-    return STATIC_CAST(EffectStateFactory, &DistortionFactory);
-}
-
-
-void ALdistortion_setParami(ALeffect *UNUSED(effect), ALCcontext *context, ALenum param, ALint UNUSED(val))
-{ alSetError(context, AL_INVALID_ENUM, "Invalid distortion integer property 0x%04x", param); }
-void ALdistortion_setParamiv(ALeffect *UNUSED(effect), ALCcontext *context, ALenum param, const ALint *UNUSED(vals))
-{ alSetError(context, AL_INVALID_ENUM, "Invalid distortion integer-vector property 0x%04x", param); }
-void ALdistortion_setParamf(ALeffect *effect, ALCcontext *context, ALenum param, ALfloat val)
-{
-    ALeffectProps *props = &effect->Props;
-    switch(param)
-    {
-        case AL_DISTORTION_EDGE:
-            if(!(val >= AL_DISTORTION_MIN_EDGE && val <= AL_DISTORTION_MAX_EDGE))
-                SETERR_RETURN(context, AL_INVALID_VALUE,, "Distortion edge out of range");
-            props->Distortion.Edge = val;
-            break;
-
-        case AL_DISTORTION_GAIN:
-            if(!(val >= AL_DISTORTION_MIN_GAIN && val <= AL_DISTORTION_MAX_GAIN))
-                SETERR_RETURN(context, AL_INVALID_VALUE,, "Distortion gain out of range");
-            props->Distortion.Gain = val;
-            break;
-
-        case AL_DISTORTION_LOWPASS_CUTOFF:
-            if(!(val >= AL_DISTORTION_MIN_LOWPASS_CUTOFF && val <= AL_DISTORTION_MAX_LOWPASS_CUTOFF))
-                SETERR_RETURN(context, AL_INVALID_VALUE,, "Distortion low-pass cutoff out of range");
-            props->Distortion.LowpassCutoff = val;
-            break;
-
-        case AL_DISTORTION_EQCENTER:
-            if(!(val >= AL_DISTORTION_MIN_EQCENTER && val <= AL_DISTORTION_MAX_EQCENTER))
-                SETERR_RETURN(context, AL_INVALID_VALUE,, "Distortion EQ center out of range");
-            props->Distortion.EQCenter = val;
-            break;
-
-        case AL_DISTORTION_EQBANDWIDTH:
-            if(!(val >= AL_DISTORTION_MIN_EQBANDWIDTH && val <= AL_DISTORTION_MAX_EQBANDWIDTH))
-                SETERR_RETURN(context, AL_INVALID_VALUE,, "Distortion EQ bandwidth out of range");
-            props->Distortion.EQBandwidth = val;
-            break;
-
-        default:
-            alSetError(context, AL_INVALID_ENUM, "Invalid distortion float property 0x%04x",
-                       param);
-    }
-}
-void ALdistortion_setParamfv(ALeffect *effect, ALCcontext *context, ALenum param, const ALfloat *vals)
-{ ALdistortion_setParamf(effect, context, param, vals[0]); }
-
-void ALdistortion_getParami(const ALeffect *UNUSED(effect), ALCcontext *context, ALenum param, ALint *UNUSED(val))
-{ alSetError(context, AL_INVALID_ENUM, "Invalid distortion integer property 0x%04x", param); }
-void ALdistortion_getParamiv(const ALeffect *UNUSED(effect), ALCcontext *context, ALenum param, ALint *UNUSED(vals))
-{ alSetError(context, AL_INVALID_ENUM, "Invalid distortion integer-vector property 0x%04x", param); }
-void ALdistortion_getParamf(const ALeffect *effect, ALCcontext *context, ALenum param, ALfloat *val)
-{
-    const ALeffectProps *props = &effect->Props;
-    switch(param)
-    {
-        case AL_DISTORTION_EDGE:
-            *val = props->Distortion.Edge;
-            break;
-
-        case AL_DISTORTION_GAIN:
-            *val = props->Distortion.Gain;
-            break;
-
-        case AL_DISTORTION_LOWPASS_CUTOFF:
-            *val = props->Distortion.LowpassCutoff;
-            break;
-
-        case AL_DISTORTION_EQCENTER:
-            *val = props->Distortion.EQCenter;
-            break;
-
-        case AL_DISTORTION_EQBANDWIDTH:
-            *val = props->Distortion.EQBandwidth;
-            break;
-
-        default:
-            alSetError(context, AL_INVALID_ENUM, "Invalid distortion float property 0x%04x",
-                       param);
-    }
-}
-void ALdistortion_getParamfv(const ALeffect *effect, ALCcontext *context, ALenum param, ALfloat *vals)
-{ ALdistortion_getParamf(effect, context, param, vals); }
-
-DEFINE_ALEFFECT_VTABLE(ALdistortion);