alcEcho.c File Reference

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

Go to the source code of this file.

Typedefs
typedef struct ALechoState	ALechoState

Functions
ALeffectState *	EchoCreate (void)
static ALvoid	EchoDestroy (ALeffectState *effect)
static ALboolean	EchoDeviceUpdate (ALeffectState *effect, ALCdevice *Device)
static ALvoid	EchoProcess (ALeffectState *effect, ALuint SamplesToDo, const ALfloat *RESTRICT SamplesIn, ALfloat(*RESTRICT SamplesOut)[BUFFERSIZE])
static ALvoid	EchoUpdate (ALeffectState *effect, ALCdevice *Device, const ALeffectslot *Slot)

Typedef Documentation

typedef struct ALechoState ALechoState

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

Function Documentation

ALeffectState* EchoCreate

(

void

)

Definition at line 159 of file alcEcho.c.

References EchoDestroy(), EchoDeviceUpdate(), EchoProcess(), EchoUpdate(), malloc, and NULL.

Referenced by InitializeEffect().

static ALvoid EchoDestroy ( ALeffectState *  effect )

static

Definition at line 55 of file alcEcho.c.

References free, and NULL.

Referenced by EchoCreate().

static ALboolean EchoDeviceUpdate ( ALeffectState *  effect, ALCdevice *  Device  )

static

Definition at line 66 of file alcEcho.c.

References AL_ECHO_MAX_DELAY, AL_ECHO_MAX_LRDELAY, AL_FALSE, AL_TRUE, fastf2u(), ALCdevice_struct::Frequency, i, NextPowerOf2(), and realloc.

Referenced by EchoCreate().

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

static

Definition at line 129 of file alcEcho.c.

References i, k, lpFilter2P(), and MaxChannels.

Referenced by EchoCreate().

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

static

Definition at line 93 of file alcEcho.c.

References ComputeAngleGains(), ALeffect::Damping, ALeffect::Delay, ALeffect::Echo, ALeffectslot::effect, F_PI, fastf2u(), ALeffect::Feedback, ALCdevice_struct::Frequency, ALeffectslot::Gain, i, LOWPASSFREQREF, lpCoeffCalc(), ALeffect::LRDelay, MaxChannels, and ALeffect::Spread.

Referenced by EchoCreate().