Move remaining effects to the effects subdir

1 files changed, 411 insertions, 0 deletions

diff --git a/Alc/effects/flanger.c b/Alc/effects/flanger.c
new file mode 100644
index 00000000..a0f94a46
--- /dev/null
+++ b/Alc/effects/flanger.c
@@ -0,0 +1,411 @@
+/**
+ * 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., 59 Temple Place - Suite 330,
+ *  Boston, MA  02111-1307, USA.
+ * Or go to http://www.gnu.org/copyleft/lgpl.html
+ */
+
+#include "config.h"
+
+#include <math.h>
+#include <stdlib.h>
+
+#include "alMain.h"
+#include "alFilter.h"
+#include "alAuxEffectSlot.h"
+#include "alError.h"
+#include "alu.h"
+
+
+typedef struct ALflangerStateFactory {
+    DERIVE_FROM_TYPE(ALeffectStateFactory);
+} ALflangerStateFactory;
+
+static ALflangerStateFactory FlangerFactory;
+
+
+typedef struct ALflangerState {
+    DERIVE_FROM_TYPE(ALeffectState);
+
+    ALfloat *SampleBufferLeft;
+    ALfloat *SampleBufferRight;
+    ALuint BufferLength;
+    ALint offset;
+    ALfloat lfo_coeff;
+    ALint lfo_disp;
+
+    /* Gains for left and right sides */
+    ALfloat Gain[2][MaxChannels];
+
+    /* effect parameters */
+    ALint waveform;
+    ALint delay;
+    ALfloat depth;
+    ALfloat feedback;
+} ALflangerState;
+
+static ALvoid ALflangerState_Destruct(ALflangerState *state)
+{
+    free(state->SampleBufferLeft);
+    state->SampleBufferLeft = NULL;
+
+    free(state->SampleBufferRight);
+    state->SampleBufferRight = NULL;
+}
+
+static ALboolean ALflangerState_DeviceUpdate(ALflangerState *state, ALCdevice *Device)
+{
+    ALuint maxlen;
+    ALuint it;
+
+    maxlen = fastf2u(AL_FLANGER_MAX_DELAY * 3.0f * Device->Frequency) + 1;
+    maxlen = NextPowerOf2(maxlen);
+
+    if(maxlen != state->BufferLength)
+    {
+        void *temp;
+
+        temp = realloc(state->SampleBufferLeft, maxlen * sizeof(ALfloat));
+        if(!temp) return AL_FALSE;
+        state->SampleBufferLeft = temp;
+
+        temp = realloc(state->SampleBufferRight, maxlen * sizeof(ALfloat));
+        if(!temp) return AL_FALSE;
+        state->SampleBufferRight = temp;
+
+        state->BufferLength = maxlen;
+    }
+
+    for(it = 0;it < state->BufferLength;it++)
+    {
+        state->SampleBufferLeft[it] = 0.0f;
+        state->SampleBufferRight[it] = 0.0f;
+    }
+
+    return AL_TRUE;
+}
+
+static ALvoid ALflangerState_Update(ALflangerState *state, ALCdevice *Device, const ALeffectslot *Slot)
+{
+    ALfloat frequency = (ALfloat)Device->Frequency;
+    ALfloat rate;
+    ALint phase;
+    ALuint it;
+
+    for(it = 0;it < MaxChannels;it++)
+    {
+        state->Gain[0][it] = 0.0f;
+        state->Gain[1][it] = 0.0f;
+    }
+
+    state->waveform = Slot->effect.Flanger.Waveform;
+    state->depth = Slot->effect.Flanger.Depth;
+    state->feedback = Slot->effect.Flanger.Feedback;
+    state->delay = fastf2i(Slot->effect.Flanger.Delay * frequency);
+
+    /* Gains for left and right sides */
+    ComputeAngleGains(Device, atan2f(-1.0f, 0.0f), 0.0f, Slot->Gain, state->Gain[0]);
+    ComputeAngleGains(Device, atan2f(+1.0f, 0.0f), 0.0f, Slot->Gain, state->Gain[1]);
+
+    phase = Slot->effect.Flanger.Phase;
+    rate = Slot->effect.Flanger.Rate;
+
+    /* Calculate LFO coefficient */
+    switch(state->waveform)
+    {
+        case AL_FLANGER_WAVEFORM_TRIANGLE:
+             if(rate == 0.0f)
+                 state->lfo_coeff = 0.0f;
+             else
+                 state->lfo_coeff = 1.0f / (frequency / rate);
+             break;
+        case AL_FLANGER_WAVEFORM_SINUSOID:
+             if(rate == 0.0f)
+                 state->lfo_coeff = 0.0f;
+             else
+                 state->lfo_coeff = F_PI * 2.0f / (frequency / rate);
+             break;
+    }
+
+    /* Calculate lfo phase displacement */
+    if(phase == 0 || rate == 0.0f)
+        state->lfo_disp = 0;
+    else
+        state->lfo_disp = fastf2i(frequency / rate / (360.0f/phase));
+}
+
+static __inline void Triangle(ALint *delay_left, ALint *delay_right, ALint offset, const ALflangerState *state)
+{
+    ALfloat lfo_value;
+
+    lfo_value = 2.0f - fabsf(2.0f - fmodf(state->lfo_coeff * offset * 4.0f, 4.0f));
+    lfo_value *= state->depth * state->delay;
+    *delay_left = fastf2i(lfo_value) + state->delay;
+
+    lfo_value = 2.0f - fabsf(2.0f - fmodf(state->lfo_coeff *
+                                          (offset+state->lfo_disp) * 4.0f,
+                                          4.0f));
+    lfo_value *= state->depth * state->delay;
+    *delay_right = fastf2i(lfo_value) + state->delay;
+}
+
+static __inline void Sinusoid(ALint *delay_left, ALint *delay_right, ALint offset, const ALflangerState *state)
+{
+    ALfloat lfo_value;
+
+    lfo_value = 1.0f + sinf(fmodf(state->lfo_coeff * offset, 2.0f*F_PI));
+    lfo_value *= state->depth * state->delay;
+    *delay_left = fastf2i(lfo_value) + state->delay;
+
+    lfo_value = 1.0f + sinf(fmodf(state->lfo_coeff * (offset+state->lfo_disp),
+                                  2.0f*F_PI));
+    lfo_value *= state->depth * state->delay;
+    *delay_right = fastf2i(lfo_value) + state->delay;
+}
+
+#define DECL_TEMPLATE(func)                                                    \
+static void Process##func(ALflangerState *state, ALuint SamplesToDo,           \
+                          const ALfloat *restrict SamplesIn,                   \
+                          ALfloat (*restrict SamplesOut)[BUFFERSIZE])          \
+{                                                                              \
+    const ALint mask = state->BufferLength-1;                                  \
+    ALint offset = state->offset;                                              \
+    ALuint it, kt;                                                             \
+    ALuint base;                                                               \
+                                                                               \
+    for(base = 0;base < SamplesToDo;)                                          \
+    {                                                                          \
+        ALfloat temps[64][2];                                                  \
+        ALuint td = minu(SamplesToDo-base, 64);                                \
+                                                                               \
+        for(it = 0;it < td;it++,offset++)                                      \
+        {                                                                      \
+            ALint delay_left, delay_right;                                     \
+            (func)(&delay_left, &delay_right, offset, state);                  \
+                                                                               \
+            temps[it][0] = state->SampleBufferLeft[(offset-delay_left)&mask];  \
+            state->SampleBufferLeft[offset&mask] = (temps[it][0] +             \
+                                                    SamplesIn[it+base]) *      \
+                                                   state->feedback;            \
+                                                                               \
+            temps[it][1] = state->SampleBufferRight[(offset-delay_right)&mask];\
+            state->SampleBufferRight[offset&mask] = (temps[it][1] +            \
+                                                     SamplesIn[it+base]) *     \
+                                                    state->feedback;           \
+        }                                                                      \
+                                                                               \
+        for(kt = 0;kt < MaxChannels;kt++)                                      \
+        {                                                                      \
+            ALfloat gain = state->Gain[0][kt];                                 \
+            if(gain > 0.00001f)                                                \
+            {                                                                  \
+                for(it = 0;it < td;it++)                                       \
+                    SamplesOut[kt][it+base] += temps[it][0] * gain;            \
+            }                                                                  \
+                                                                               \
+            gain = state->Gain[1][kt];                                         \
+            if(gain > 0.00001f)                                                \
+            {                                                                  \
+                for(it = 0;it < td;it++)                                       \
+                    SamplesOut[kt][it+base] += temps[it][1] * gain;            \
+            }                                                                  \
+        }                                                                      \
+                                                                               \
+        base += td;                                                            \
+    }                                                                          \
+                                                                               \
+    state->offset = offset;                                                    \
+}
+
+DECL_TEMPLATE(Triangle)
+DECL_TEMPLATE(Sinusoid)
+
+#undef DECL_TEMPLATE
+
+static ALvoid ALflangerState_Process(ALflangerState *state, ALuint SamplesToDo, const ALfloat *restrict SamplesIn, ALfloat (*restrict SamplesOut)[BUFFERSIZE])
+{
+    if(state->waveform == AL_FLANGER_WAVEFORM_TRIANGLE)
+        ProcessTriangle(state, SamplesToDo, SamplesIn, SamplesOut);
+    else if(state->waveform == AL_FLANGER_WAVEFORM_SINUSOID)
+        ProcessSinusoid(state, SamplesToDo, SamplesIn, SamplesOut);
+}
+
+static ALeffectStateFactory *ALflangerState_getCreator(void)
+{
+    return STATIC_CAST(ALeffectStateFactory, &FlangerFactory);
+}
+
+DEFINE_ALEFFECTSTATE_VTABLE(ALflangerState);
+
+
+ALeffectState *ALflangerStateFactory_create(void)
+{
+    ALflangerState *state;
+
+    state = malloc(sizeof(*state));
+    if(!state) return NULL;
+    SET_VTABLE2(ALflangerState, ALeffectState, state);
+
+    state->BufferLength = 0;
+    state->SampleBufferLeft = NULL;
+    state->SampleBufferRight = NULL;
+    state->offset = 0;
+
+    return STATIC_CAST(ALeffectState, state);
+}
+
+static ALvoid ALflangerStateFactory_destroy(ALeffectState *effect)
+{
+    ALflangerState *state = STATIC_UPCAST(ALflangerState, ALeffectState, effect);
+    ALflangerState_Destruct(state);
+    free(state);
+}
+
+DEFINE_ALEFFECTSTATEFACTORY_VTABLE(ALflangerStateFactory);
+
+
+static void init_flanger_factory(void)
+{
+    SET_VTABLE2(ALflangerStateFactory, ALeffectStateFactory, &FlangerFactory);
+}
+
+ALeffectStateFactory *ALflangerStateFactory_getFactory(void)
+{
+    static pthread_once_t once = PTHREAD_ONCE_INIT;
+    pthread_once(&once, init_flanger_factory);
+    return STATIC_CAST(ALeffectStateFactory, &FlangerFactory);
+}
+
+
+void flanger_SetParami(ALeffect *effect, ALCcontext *context, ALenum param, ALint val)
+{
+    switch(param)
+    {
+        case AL_FLANGER_WAVEFORM:
+            if(val >= AL_FLANGER_MIN_WAVEFORM && val <= AL_FLANGER_MAX_WAVEFORM)
+                effect->Flanger.Waveform = val;
+            else
+                alSetError(context, AL_INVALID_VALUE);
+            break;
+
+        case AL_FLANGER_PHASE:
+            if(val >= AL_FLANGER_MIN_PHASE && val <= AL_FLANGER_MAX_PHASE)
+                effect->Flanger.Phase = val;
+            else
+                alSetError(context, AL_INVALID_VALUE);
+            break;
+
+        default:
+            alSetError(context, AL_INVALID_ENUM);
+            break;
+    }
+}
+void flanger_SetParamiv(ALeffect *effect, ALCcontext *context, ALenum param, const ALint *vals)
+{
+    flanger_SetParami(effect, context, param, vals[0]);
+}
+void flanger_SetParamf(ALeffect *effect, ALCcontext *context, ALenum param, ALfloat val)
+{
+    switch(param)
+    {
+        case AL_FLANGER_RATE:
+            if(val >= AL_FLANGER_MIN_RATE && val <= AL_FLANGER_MAX_RATE)
+                effect->Flanger.Rate = val;
+            else
+                alSetError(context, AL_INVALID_VALUE);
+            break;
+
+        case AL_FLANGER_DEPTH:
+            if(val >= AL_FLANGER_MIN_DEPTH && val <= AL_FLANGER_MAX_DEPTH)
+                effect->Flanger.Depth = val;
+            else
+                alSetError(context, AL_INVALID_VALUE);
+            break;
+
+        case AL_FLANGER_FEEDBACK:
+            if(val >= AL_FLANGER_MIN_FEEDBACK && val <= AL_FLANGER_MAX_FEEDBACK)
+                effect->Flanger.Feedback = val;
+            else
+                alSetError(context, AL_INVALID_VALUE);
+            break;
+
+        case AL_FLANGER_DELAY:
+            if(val >= AL_FLANGER_MIN_DELAY && val <= AL_FLANGER_MAX_DELAY)
+                effect->Flanger.Delay = val;
+            else
+                alSetError(context, AL_INVALID_VALUE);
+            break;
+
+        default:
+            alSetError(context, AL_INVALID_ENUM);
+            break;
+    }
+}
+void flanger_SetParamfv(ALeffect *effect, ALCcontext *context, ALenum param, const ALfloat *vals)
+{
+    flanger_SetParamf(effect, context, param, vals[0]);
+}
+
+void flanger_GetParami(ALeffect *effect, ALCcontext *context, ALenum param, ALint *val)
+{
+    switch(param)
+    {
+        case AL_FLANGER_WAVEFORM:
+            *val = effect->Flanger.Waveform;
+            break;
+
+        case AL_FLANGER_PHASE:
+            *val = effect->Flanger.Phase;
+            break;
+
+        default:
+            alSetError(context, AL_INVALID_ENUM);
+            break;
+    }
+}
+void flanger_GetParamiv(ALeffect *effect, ALCcontext *context, ALenum param, ALint *vals)
+{
+    flanger_GetParami(effect, context, param, vals);
+}
+void flanger_GetParamf(ALeffect *effect, ALCcontext *context, ALenum param, ALfloat *val)
+{
+    switch(param)
+    {
+        case AL_FLANGER_RATE:
+            *val = effect->Flanger.Rate;
+            break;
+
+        case AL_FLANGER_DEPTH:
+            *val = effect->Flanger.Depth;
+            break;
+
+        case AL_FLANGER_FEEDBACK:
+            *val = effect->Flanger.Feedback;
+            break;
+
+        case AL_FLANGER_DELAY:
+            *val = effect->Flanger.Delay;
+            break;
+
+        default:
+            alSetError(context, AL_INVALID_ENUM);
+            break;
+    }
+}
+void flanger_GetParamfv(ALeffect *effect, ALCcontext *context, ALenum param, ALfloat *vals)
+{
+    flanger_GetParamf(effect, context, param, vals);
+}