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-rw-r--r--Alc/effects/fshifter.c329
1 files changed, 0 insertions, 329 deletions
diff --git a/Alc/effects/fshifter.c b/Alc/effects/fshifter.c
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--- a/Alc/effects/fshifter.c
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@@ -1,329 +0,0 @@
-/**
- * OpenAL cross platform audio library
- * Copyright (C) 2018 by Raul Herraiz.
- * 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"
-
-#include "alcomplex.h"
-
-#define HIL_SIZE 1024
-#define OVERSAMP (1<<2)
-
-#define HIL_STEP (HIL_SIZE / OVERSAMP)
-#define FIFO_LATENCY (HIL_STEP * (OVERSAMP-1))
-
-
-typedef struct ALfshifterState {
- DERIVE_FROM_TYPE(ALeffectState);
-
- /* Effect parameters */
- ALsizei count;
- ALsizei PhaseStep;
- ALsizei Phase;
- ALdouble ld_sign;
-
- /*Effects buffers*/
- ALfloat InFIFO[HIL_SIZE];
- ALcomplex OutFIFO[HIL_SIZE];
- ALcomplex OutputAccum[HIL_SIZE];
- ALcomplex Analytic[HIL_SIZE];
- ALcomplex Outdata[BUFFERSIZE];
-
- alignas(16) ALfloat BufferOut[BUFFERSIZE];
-
- /* Effect gains for each output channel */
- ALfloat CurrentGains[MAX_OUTPUT_CHANNELS];
- ALfloat TargetGains[MAX_OUTPUT_CHANNELS];
-} ALfshifterState;
-
-static ALvoid ALfshifterState_Destruct(ALfshifterState *state);
-static ALboolean ALfshifterState_deviceUpdate(ALfshifterState *state, ALCdevice *device);
-static ALvoid ALfshifterState_update(ALfshifterState *state, const ALCcontext *context, const ALeffectslot *slot, const ALeffectProps *props);
-static ALvoid ALfshifterState_process(ALfshifterState *state, ALsizei SamplesToDo, const ALfloat (*restrict SamplesIn)[BUFFERSIZE], ALfloat (*restrict SamplesOut)[BUFFERSIZE], ALsizei NumChannels);
-DECLARE_DEFAULT_ALLOCATORS(ALfshifterState)
-
-DEFINE_ALEFFECTSTATE_VTABLE(ALfshifterState);
-
-/* Define a Hann window, used to filter the HIL input and output. */
-alignas(16) static ALdouble HannWindow[HIL_SIZE];
-
-static void InitHannWindow(void)
-{
- ALsizei i;
-
- /* Create lookup table of the Hann window for the desired size, i.e. HIL_SIZE */
- for(i = 0;i < HIL_SIZE>>1;i++)
- {
- ALdouble val = sin(M_PI * (ALdouble)i / (ALdouble)(HIL_SIZE-1));
- HannWindow[i] = HannWindow[HIL_SIZE-1-i] = val * val;
- }
-}
-
-static alonce_flag HannInitOnce = AL_ONCE_FLAG_INIT;
-
-static void ALfshifterState_Construct(ALfshifterState *state)
-{
- ALeffectState_Construct(STATIC_CAST(ALeffectState, state));
- SET_VTABLE2(ALfshifterState, ALeffectState, state);
-
- alcall_once(&HannInitOnce, InitHannWindow);
-}
-
-static ALvoid ALfshifterState_Destruct(ALfshifterState *state)
-{
- ALeffectState_Destruct(STATIC_CAST(ALeffectState,state));
-}
-
-static ALboolean ALfshifterState_deviceUpdate(ALfshifterState *state, ALCdevice *UNUSED(device))
-{
- /* (Re-)initializing parameters and clear the buffers. */
- state->count = FIFO_LATENCY;
- state->PhaseStep = 0;
- state->Phase = 0;
- state->ld_sign = 1.0;
-
- memset(state->InFIFO, 0, sizeof(state->InFIFO));
- memset(state->OutFIFO, 0, sizeof(state->OutFIFO));
- memset(state->OutputAccum, 0, sizeof(state->OutputAccum));
- memset(state->Analytic, 0, sizeof(state->Analytic));
-
- memset(state->CurrentGains, 0, sizeof(state->CurrentGains));
- memset(state->TargetGains, 0, sizeof(state->TargetGains));
-
- return AL_TRUE;
-}
-
-static ALvoid ALfshifterState_update(ALfshifterState *state, const ALCcontext *context, const ALeffectslot *slot, const ALeffectProps *props)
-{
- const ALCdevice *device = context->Device;
- ALfloat coeffs[MAX_AMBI_COEFFS];
- ALfloat step;
-
- step = props->Fshifter.Frequency / (ALfloat)device->Frequency;
- state->PhaseStep = fastf2i(minf(step, 0.5f) * FRACTIONONE);
-
- switch(props->Fshifter.LeftDirection)
- {
- case AL_FREQUENCY_SHIFTER_DIRECTION_DOWN:
- state->ld_sign = -1.0;
- break;
-
- case AL_FREQUENCY_SHIFTER_DIRECTION_UP:
- state->ld_sign = 1.0;
- break;
-
- case AL_FREQUENCY_SHIFTER_DIRECTION_OFF:
- state->Phase = 0;
- state->PhaseStep = 0;
- break;
- }
-
- CalcAngleCoeffs(0.0f, 0.0f, 0.0f, coeffs);
- ComputePanGains(&device->Dry, coeffs, slot->Params.Gain, state->TargetGains);
-}
-
-static ALvoid ALfshifterState_process(ALfshifterState *state, ALsizei SamplesToDo, const ALfloat (*restrict SamplesIn)[BUFFERSIZE], ALfloat (*restrict SamplesOut)[BUFFERSIZE], ALsizei NumChannels)
-{
- static const ALcomplex complex_zero = { 0.0, 0.0 };
- ALfloat *restrict BufferOut = state->BufferOut;
- ALsizei j, k, base;
-
- for(base = 0;base < SamplesToDo;)
- {
- ALsizei todo = mini(HIL_SIZE-state->count, SamplesToDo-base);
-
- ASSUME(todo > 0);
-
- /* Fill FIFO buffer with samples data */
- k = state->count;
- for(j = 0;j < todo;j++,k++)
- {
- state->InFIFO[k] = SamplesIn[0][base+j];
- state->Outdata[base+j] = state->OutFIFO[k-FIFO_LATENCY];
- }
- state->count += todo;
- base += todo;
-
- /* Check whether FIFO buffer is filled */
- if(state->count < HIL_SIZE) continue;
-
- state->count = FIFO_LATENCY;
-
- /* Real signal windowing and store in Analytic buffer */
- for(k = 0;k < HIL_SIZE;k++)
- {
- state->Analytic[k].Real = state->InFIFO[k] * HannWindow[k];
- state->Analytic[k].Imag = 0.0;
- }
-
- /* Processing signal by Discrete Hilbert Transform (analytical signal). */
- complex_hilbert(state->Analytic, HIL_SIZE);
-
- /* Windowing and add to output accumulator */
- for(k = 0;k < HIL_SIZE;k++)
- {
- state->OutputAccum[k].Real += 2.0/OVERSAMP*HannWindow[k]*state->Analytic[k].Real;
- state->OutputAccum[k].Imag += 2.0/OVERSAMP*HannWindow[k]*state->Analytic[k].Imag;
- }
-
- /* Shift accumulator, input & output FIFO */
- for(k = 0;k < HIL_STEP;k++) state->OutFIFO[k] = state->OutputAccum[k];
- for(j = 0;k < HIL_SIZE;k++,j++) state->OutputAccum[j] = state->OutputAccum[k];
- for(;j < HIL_SIZE;j++) state->OutputAccum[j] = complex_zero;
- for(k = 0;k < FIFO_LATENCY;k++)
- state->InFIFO[k] = state->InFIFO[k+HIL_STEP];
- }
-
- /* Process frequency shifter using the analytic signal obtained. */
- for(k = 0;k < SamplesToDo;k++)
- {
- ALdouble phase = state->Phase * ((1.0/FRACTIONONE) * 2.0*M_PI);
- BufferOut[k] = (ALfloat)(state->Outdata[k].Real*cos(phase) +
- state->Outdata[k].Imag*sin(phase)*state->ld_sign);
-
- state->Phase += state->PhaseStep;
- state->Phase &= FRACTIONMASK;
- }
-
- /* Now, mix the processed sound data to the output. */
- MixSamples(BufferOut, NumChannels, SamplesOut, state->CurrentGains, state->TargetGains,
- maxi(SamplesToDo, 512), 0, SamplesToDo);
-}
-
-typedef struct FshifterStateFactory {
- DERIVE_FROM_TYPE(EffectStateFactory);
-} FshifterStateFactory;
-
-static ALeffectState *FshifterStateFactory_create(FshifterStateFactory *UNUSED(factory))
-{
- ALfshifterState *state;
-
- NEW_OBJ0(state, ALfshifterState)();
- if(!state) return NULL;
-
- return STATIC_CAST(ALeffectState, state);
-}
-
-DEFINE_EFFECTSTATEFACTORY_VTABLE(FshifterStateFactory);
-
-EffectStateFactory *FshifterStateFactory_getFactory(void)
-{
- static FshifterStateFactory FshifterFactory = { { GET_VTABLE2(FshifterStateFactory, EffectStateFactory) } };
-
- return STATIC_CAST(EffectStateFactory, &FshifterFactory);
-}
-
-void ALfshifter_setParamf(ALeffect *effect, ALCcontext *context, ALenum param, ALfloat val)
-{
- ALeffectProps *props = &effect->Props;
- switch(param)
- {
- case AL_FREQUENCY_SHIFTER_FREQUENCY:
- if(!(val >= AL_FREQUENCY_SHIFTER_MIN_FREQUENCY && val <= AL_FREQUENCY_SHIFTER_MAX_FREQUENCY))
- SETERR_RETURN(context, AL_INVALID_VALUE,,"Frequency shifter frequency out of range");
- props->Fshifter.Frequency = val;
- break;
-
- default:
- alSetError(context, AL_INVALID_ENUM, "Invalid frequency shifter float property 0x%04x", param);
- }
-}
-
-void ALfshifter_setParamfv(ALeffect *effect, ALCcontext *context, ALenum param, const ALfloat *vals)
-{
- ALfshifter_setParamf(effect, context, param, vals[0]);
-}
-
-void ALfshifter_setParami(ALeffect *effect, ALCcontext *context, ALenum param, ALint val)
-{
- ALeffectProps *props = &effect->Props;
- switch(param)
- {
- case AL_FREQUENCY_SHIFTER_LEFT_DIRECTION:
- if(!(val >= AL_FREQUENCY_SHIFTER_MIN_LEFT_DIRECTION && val <= AL_FREQUENCY_SHIFTER_MAX_LEFT_DIRECTION))
- SETERR_RETURN(context, AL_INVALID_VALUE,,"Frequency shifter left direction out of range");
- props->Fshifter.LeftDirection = val;
- break;
-
- case AL_FREQUENCY_SHIFTER_RIGHT_DIRECTION:
- if(!(val >= AL_FREQUENCY_SHIFTER_MIN_RIGHT_DIRECTION && val <= AL_FREQUENCY_SHIFTER_MAX_RIGHT_DIRECTION))
- SETERR_RETURN(context, AL_INVALID_VALUE,,"Frequency shifter right direction out of range");
- props->Fshifter.RightDirection = val;
- break;
-
- default:
- alSetError(context, AL_INVALID_ENUM, "Invalid frequency shifter integer property 0x%04x", param);
- }
-}
-void ALfshifter_setParamiv(ALeffect *effect, ALCcontext *context, ALenum param, const ALint *vals)
-{
- ALfshifter_setParami(effect, context, param, vals[0]);
-}
-
-void ALfshifter_getParami(const ALeffect *effect, ALCcontext *context, ALenum param, ALint *val)
-{
- const ALeffectProps *props = &effect->Props;
- switch(param)
- {
- case AL_FREQUENCY_SHIFTER_LEFT_DIRECTION:
- *val = props->Fshifter.LeftDirection;
- break;
- case AL_FREQUENCY_SHIFTER_RIGHT_DIRECTION:
- *val = props->Fshifter.RightDirection;
- break;
- default:
- alSetError(context, AL_INVALID_ENUM, "Invalid frequency shifter integer property 0x%04x", param);
- }
-}
-void ALfshifter_getParamiv(const ALeffect *effect, ALCcontext *context, ALenum param, ALint *vals)
-{
- ALfshifter_getParami(effect, context, param, vals);
-}
-
-void ALfshifter_getParamf(const ALeffect *effect, ALCcontext *context, ALenum param, ALfloat *val)
-{
-
- const ALeffectProps *props = &effect->Props;
- switch(param)
- {
- case AL_FREQUENCY_SHIFTER_FREQUENCY:
- *val = props->Fshifter.Frequency;
- break;
-
- default:
- alSetError(context, AL_INVALID_ENUM, "Invalid frequency shifter float property 0x%04x", param);
- }
-
-}
-
-void ALfshifter_getParamfv(const ALeffect *effect, ALCcontext *context, ALenum param, ALfloat *vals)
-{
- ALfshifter_getParamf(effect, context, param, vals);
-}
-
-DEFINE_ALEFFECT_VTABLE(ALfshifter);
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