hrtf.c File Reference

#include "config.h"
#include <stdlib.h>
#include <ctype.h>
#include "AL/al.h"
#include "AL/alc.h"
#include "alMain.h"
#include "alSource.h"
#include "alu.h"
#include "hrtf_tables.inc"

Go to the source code of this file.

Macros
#define	MAX_AZ_COUNT   (128)
#define	MAX_EV_COUNT   (128)
#define	MAX_IR_SIZE   (128)
#define	MIN_AZ_COUNT   (1)
#define	MIN_EV_COUNT   (5)
#define	MIN_IR_SIZE   (8)
#define	MOD_IR_SIZE   (8)
#define	PATH_MAX   4096

Functions
static void	CalcAzIndices (const struct Hrtf *Hrtf, ALuint evidx, ALfloat az, ALuint *azidx, ALfloat *azmu)
static void	CalcEvIndices (const struct Hrtf *Hrtf, ALfloat ev, ALuint *evidx, ALfloat *evmu)
ALfloat	CalcHrtfDelta (ALfloat oldGain, ALfloat newGain, const ALfloat olddir[3], const ALfloat newdir[3])
void	FreeHrtfs (void)
struct Hrtf *	GetHrtf (ALCdevice *device)
ALuint	GetHrtfIrSize (const struct Hrtf *Hrtf)
void	GetLerpedHrtfCoeffs (const struct Hrtf *Hrtf, ALfloat elevation, ALfloat azimuth, ALfloat gain, ALfloat(*coeffs)[2], ALuint *delays)
ALuint	GetMovingHrtfCoeffs (const struct Hrtf *Hrtf, ALfloat elevation, ALfloat azimuth, ALfloat gain, ALfloat delta, ALint counter, ALfloat(*coeffs)[2], ALuint *delays, ALfloat(*coeffStep)[2], ALint *delayStep)
static struct Hrtf *	LoadHrtf (ALuint deviceRate)
static struct Hrtf *	LoadHrtf00 (FILE *f, ALuint deviceRate)
static struct Hrtf *	LoadHrtf01 (FILE *f, ALuint deviceRate)

Variables
static struct Hrtf *	LoadedHrtfs = NULL
static const ALchar	magicMarker00 [8] = "MinPHR00"
static const ALchar	magicMarker01 [8] = "MinPHR01"

Macro Definition Documentation

#define MAX_AZ_COUNT   (128)

Definition at line 47 of file hrtf.c.

Referenced by LoadHrtf00(), and LoadHrtf01().

#define MAX_EV_COUNT   (128)

Definition at line 44 of file hrtf.c.

Referenced by LoadHrtf00(), and LoadHrtf01().

#define MAX_IR_SIZE   (128)

Definition at line 40 of file hrtf.c.

Referenced by LoadHrtf00(), and LoadHrtf01().

#define MIN_AZ_COUNT   (1)

Definition at line 46 of file hrtf.c.

Referenced by LoadHrtf00(), and LoadHrtf01().

#define MIN_EV_COUNT   (5)

Definition at line 43 of file hrtf.c.

Referenced by LoadHrtf00(), and LoadHrtf01().

#define MIN_IR_SIZE   (8)

Definition at line 39 of file hrtf.c.

Referenced by LoadHrtf00(), and LoadHrtf01().

#define MOD_IR_SIZE   (8)

Definition at line 41 of file hrtf.c.

Referenced by LoadHrtf00(), and LoadHrtf01().

#define PATH_MAX   4096

OpenAL cross platform audio library Copyright (C) 2011 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

Definition at line 34 of file hrtf.c.

Referenced by LoadHrtf(), and SDL_RWFromFile().

Function Documentation

static void CalcAzIndices ( const struct Hrtf *  Hrtf, ALuint  evidx, ALfloat  az, ALuint *  azidx, ALfloat *  azmu  )

static

Definition at line 93 of file hrtf.c.

References F_PI, and fastf2u().

Referenced by GetLerpedHrtfCoeffs(), and GetMovingHrtfCoeffs().

static void CalcEvIndices ( const struct Hrtf *  Hrtf, ALfloat  ev, ALuint *  evidx, ALfloat *  evmu  )

static

Definition at line 81 of file hrtf.c.

References F_PI, F_PI_2, fastf2u(), and minu().

Referenced by GetLerpedHrtfCoeffs(), and GetMovingHrtfCoeffs().

ALfloat CalcHrtfDelta	(	ALfloat	oldGain,
		ALfloat	newGain,
		const ALfloat	olddir[3],
		const ALfloat	newdir[3]
	)

Definition at line 106 of file hrtf.c.

References F_PI, maxf(), and minf().

Referenced by CalcSourceParams().

void FreeHrtfs

(

void

)

Definition at line 786 of file hrtf.c.

References free, and NULL.

Referenced by alc_deinit_safe().

struct Hrtf* GetHrtf

(

ALCdevice *

device

)

Definition at line 762 of file hrtf.c.

References DevFmtChannelsString(), DevFmtStereo, ERR, ALCdevice_struct::FmtChans, ALCdevice_struct::Frequency, LoadedHrtfs, LoadHrtf(), and NULL.

Referenced by UpdateDeviceParams().

ALuint GetHrtfIrSize

(

const struct Hrtf *

Hrtf

)

Definition at line 801 of file hrtf.c.

Referenced by CalcNonAttnSourceParams(), and CalcSourceParams().

void GetLerpedHrtfCoeffs	(	const struct Hrtf *	Hrtf,
		ALfloat	elevation,
		ALfloat	azimuth,
		ALfloat	gain,
		ALfloat(*)	coeffs[2],
		ALuint *	delays
	)

Definition at line 140 of file hrtf.c.

References CalcAzIndices(), CalcEvIndices(), fastf2u(), HRTFDELAY_BITS, and i.

Referenced by CalcNonAttnSourceParams(), and CalcSourceParams().

ALuint GetMovingHrtfCoeffs	(	const struct Hrtf *	Hrtf,
		ALfloat	elevation,
		ALfloat	azimuth,
		ALfloat	gain,
		ALfloat	delta,
		ALint	counter,
		ALfloat(*)	coeffs[2],
		ALuint *	delays,
		ALfloat(*)	coeffStep[2],
		ALint *	delayStep
	)

Definition at line 232 of file hrtf.c.

References CalcAzIndices(), CalcEvIndices(), fastf2i(), fastf2u(), HRIR_LENGTH, HRTFDELAY_BITS, i, and maxf().

Referenced by CalcSourceParams().

static struct Hrtf* LoadHrtf ( ALuint  deviceRate )

static

Definition at line 665 of file hrtf.c.

References ConfigValueStr(), DevFmtChannelsString(), DevFmtStereo, ERR, i, LoadedHrtfs, LoadHrtf00(), LoadHrtf01(), magicMarker00, magicMarker01, minu(), NULL, PATH_MAX, and TRACE.

Referenced by GetHrtf().

static struct Hrtf* LoadHrtf00 ( FILE *  f, ALuint  deviceRate  )

static

Definition at line 353 of file hrtf.c.

References AL_FALSE, AL_TRUE, ERR, free, i, j, malloc, MAX_AZ_COUNT, MAX_EV_COUNT, MAX_IR_SIZE, MIN_AZ_COUNT, MIN_EV_COUNT, MIN_IR_SIZE, MOD_IR_SIZE, NULL, and SRC_HISTORY_LENGTH.

Referenced by LoadHrtf().

static struct Hrtf* LoadHrtf01 ( FILE *  f, ALuint  deviceRate  )

static

Definition at line 520 of file hrtf.c.

References AL_FALSE, AL_TRUE, ERR, free, i, j, malloc, MAX_AZ_COUNT, MAX_EV_COUNT, MAX_IR_SIZE, MIN_AZ_COUNT, MIN_EV_COUNT, MIN_IR_SIZE, MOD_IR_SIZE, NULL, and SRC_HISTORY_LENGTH.

Referenced by LoadHrtf().

Variable Documentation

struct Hrtf* LoadedHrtfs = NULL

static

Definition at line 75 of file hrtf.c.

Referenced by GetHrtf(), and LoadHrtf().

const ALchar magicMarker00[8] = "MinPHR00"

static

Definition at line 62 of file hrtf.c.

Referenced by LoadHrtf().

const ALchar magicMarker01[8] = "MinPHR01"

static

Definition at line 63 of file hrtf.c.

Referenced by LoadHrtf().