#include "config.h"
#include <math.h>
#include <stdlib.h>
#include "alMain.h"
#include "alFilter.h"
#include "alAuxEffectSlot.h"
#include "alError.h"
#include "alu.h"

Macros
#define	DECL_TEMPLATE(func)

#define	WAVEFORM_FRACBITS 16

#define	WAVEFORM_FRACMASK (WAVEFORM_FRACONE-1)

#define	WAVEFORM_FRACONE (1<<WAVEFORM_FRACBITS)

Typedefs
typedef struct ALmodulatorState	ALmodulatorState

Functions
static __inline ALfloat	hpFilter1P (FILTER *iir, ALuint offset, ALfloat input)

ALeffectState *	ModulatorCreate (void)

static ALvoid	ModulatorDestroy (ALeffectState *effect)

static ALboolean	ModulatorDeviceUpdate (ALeffectState effect, ALCdevice Device)

static ALvoid	ModulatorProcess (ALeffectState effect, ALuint SamplesToDo, const ALfloat RESTRICT SamplesIn, ALfloat(*RESTRICT SamplesOut)[BUFFERSIZE])

static ALvoid	ModulatorUpdate (ALeffectState effect, ALCdevice Device, const ALeffectslot *Slot)

static __inline ALfloat	Saw (ALuint index)

static __inline ALfloat	Sin (ALuint index)

static __inline ALfloat	Square (ALuint index)

Macro Definition Documentation

#define DECL_TEMPLATE ( func )

Value:

static void Process##func(ALmodulatorState *state, ALuint SamplesToDo,        \
  const ALfloat *RESTRICT SamplesIn,                                          \
  ALfloat (*RESTRICT SamplesOut)[BUFFERSIZE])                                 \
{                                                                             \
    const ALuint step = state->step;                                          \
    ALuint index = state->index;                                              \
    ALfloat samp;                                                             \
    ALuint i, k;                                                              \
                                                                              \
    for(i = 0;i < SamplesToDo;i++)                                            \
    {                                                                         \
        samp = SamplesIn[i];                                                  \
                                                                              \
        index += step;                                                        \
        index &= WAVEFORM_FRACMASK;                                           \
        samp *= func(index);                                                  \
                                                                              \
        samp = hpFilter1P(&state->iirFilter, 0, samp);                        \
                                                                              \
        for(k = 0;k < MaxChannels;k++)                                        \
            SamplesOut[k][i] += state->Gain[k] * samp;                        \
    }                                                                         \
    state->index = index;                                                     \
}

Definition at line 85 of file alcModulator.c.

#define WAVEFORM_FRACBITS 16

Definition at line 52 of file alcModulator.c.

Referenced by Square().

#define WAVEFORM_FRACMASK (WAVEFORM_FRACONE-1)

Definition at line 54 of file alcModulator.c.

#define WAVEFORM_FRACONE (1<<WAVEFORM_FRACBITS)

Definition at line 53 of file alcModulator.c.

Referenced by ModulatorUpdate(), Saw(), and Sin().

Typedef Documentation

typedef struct ALmodulatorState ALmodulatorState

OpenAL cross platform audio library Copyright (C) 2009 by Chris Robinson. 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