aacps.c File Reference

#include <stdint.h>
#include "libavutil/common.h"
#include "libavutil/mathematics.h"
#include "libavutil/mem_internal.h"
#include "aacps.h"
#include "libavutil/internal.h"
#include "aacps_tablegen.h"

Go to the source code of this file.

Macros
#define	DECAY_SLOPE   Q30(0.05f)
	All-pass filter decay slope. More...

Functions
static void	ipdopd_reset (int8_t *ipd_hist, int8_t *opd_hist)
static void	hybrid2_re (INTFLOAT(*in)[2], INTFLOAT(*out)[32][2], const INTFLOAT filter[7], int len, int reverse)
	Split one subband into 2 subsubbands with a symmetric real filter. More...
static void	hybrid6_cx (PSDSPContext *dsp, INTFLOAT(*in)[2], INTFLOAT(*out)[32][2], TABLE_CONST INTFLOAT(*filter)[8][2], int len)
	Split one subband into 6 subsubbands with a complex filter. More...
static void	hybrid4_8_12_cx (PSDSPContext *dsp, INTFLOAT(*in)[2], INTFLOAT(*out)[32][2], TABLE_CONST INTFLOAT(*filter)[8][2], int N, int len)
static void	hybrid_analysis (PSDSPContext *dsp, INTFLOAT out[91][32][2], INTFLOAT in[5][44][2], INTFLOAT L[2][38][64], int is34, int len)
static void	hybrid_synthesis (PSDSPContext *dsp, INTFLOAT out[2][38][64], INTFLOAT in[91][32][2], int is34, int len)
static void	map_idx_10_to_20 (int8_t *par_mapped, const int8_t *par, int full)
	Table 8.46. More...
static void	map_idx_34_to_20 (int8_t *par_mapped, const int8_t *par, int full)
static void	map_val_34_to_20 (INTFLOAT par[PS_MAX_NR_IIDICC])
static void	map_idx_10_to_34 (int8_t *par_mapped, const int8_t *par, int full)
static void	map_idx_20_to_34 (int8_t *par_mapped, const int8_t *par, int full)
static void	map_val_20_to_34 (INTFLOAT par[PS_MAX_NR_IIDICC])
static void	decorrelation (PSContext *ps, INTFLOAT(*out)[32][2], const INTFLOAT(*s)[32][2], int is34)
static void	remap34 (int8_t(**p_par_mapped)[PS_MAX_NR_IIDICC], int8_t(*par)[PS_MAX_NR_IIDICC], int num_par, int num_env, int full)
static void	remap20 (int8_t(**p_par_mapped)[PS_MAX_NR_IIDICC], int8_t(*par)[PS_MAX_NR_IIDICC], int num_par, int num_env, int full)
static void	stereo_processing (PSContext *ps, INTFLOAT(*l)[32][2], INTFLOAT(*r)[32][2], int is34)
int AAC_RENAME()	ff_ps_apply (PSContext *ps, INTFLOAT L[2][38][64], INTFLOAT R[2][38][64], int top)
av_cold void AAC_RENAME()	ff_ps_init (void)

Variables
static const INTFLOAT	g1_Q2 []
static const int	NR_PAR_BANDS [] = { 20, 34 }
	Number of frequency bands that can be addressed by the parameter index, b(k) More...
static const int	NR_IPDOPD_BANDS [] = { 11, 17 }
static const int	NR_BANDS [] = { 71, 91 }
	Number of frequency bands that can be addressed by the sub subband index, k. More...
static const int	DECAY_CUTOFF [] = { 10, 32 }
	Start frequency band for the all-pass filter decay slope. More...
static const int	NR_ALLPASS_BANDS [] = { 30, 50 }
	Number of all-pass filer bands. More...
static const int	SHORT_DELAY_BAND [] = { 42, 62 }
	First stereo band using the short one sample delay. More...

Macro Definition Documentation

DECAY_SLOPE

#define DECAY_SLOPE   Q30(0.05f)

All-pass filter decay slope.

Definition at line 187 of file aacps.c.

Function Documentation

ipdopd_reset()

static void ipdopd_reset ( int8_t *  ipd_hist, int8_t *  opd_hist  )

static

Definition at line 42 of file aacps.c.

Referenced by stereo_processing().

hybrid2_re()

static void hybrid2_re ( INTFLOAT(*)  in[2], INTFLOAT(*)  out[32][2], const INTFLOAT  filter[7], int  len, int  reverse  )

static

Split one subband into 2 subsubbands with a symmetric real filter.

The filter must have its non-center even coefficients equal to zero.

Definition at line 53 of file aacps.c.

Referenced by hybrid_analysis().

hybrid6_cx()

static void hybrid6_cx ( PSDSPContext *  dsp, INTFLOAT(*)  in[2], INTFLOAT(*)  out[32][2], TABLE_CONST INTFLOAT(*)  filter[8][2], int  len  )

static

Split one subband into 6 subsubbands with a complex filter.

Definition at line 80 of file aacps.c.

Referenced by hybrid_analysis().

hybrid4_8_12_cx()

static void hybrid4_8_12_cx ( PSDSPContext *  dsp, INTFLOAT(*)  in[2], INTFLOAT(*)  out[32][2], TABLE_CONST INTFLOAT(*)  filter[8][2], int  N, int  len  )

static

Definition at line 104 of file aacps.c.

Referenced by hybrid_analysis().

hybrid_analysis()

static void hybrid_analysis ( PSDSPContext *  dsp, INTFLOAT  out[91][32][2], INTFLOAT  in[5][44][2], INTFLOAT  L[2][38][64], int  is34, int  len  )

static

Definition at line 115 of file aacps.c.

Referenced by ff_ps_apply().

hybrid_synthesis()

static void hybrid_synthesis ( PSDSPContext *  dsp, INTFLOAT  out[2][38][64], INTFLOAT  in[91][32][2], int  is34, int  len  )

static

Definition at line 145 of file aacps.c.

Referenced by ff_ps_apply().

map_idx_10_to_20()

static void map_idx_10_to_20 ( int8_t *  par_mapped, const int8_t *  par, int  full  )

static

Table 8.46.

Definition at line 201 of file aacps.c.

Referenced by remap20().

map_idx_34_to_20()

static void map_idx_34_to_20 ( int8_t *  par_mapped, const int8_t *  par, int  full  )

static

Definition at line 215 of file aacps.c.

Referenced by remap20().

map_val_34_to_20()

static void map_val_34_to_20 ( INTFLOAT  par[PS_MAX_NR_IIDICC] )

static

Definition at line 241 of file aacps.c.

Referenced by stereo_processing().

map_idx_10_to_34()

static void map_idx_10_to_34 ( int8_t *  par_mapped, const int8_t *  par, int  full  )

static

Definition at line 280 of file aacps.c.

Referenced by remap34().

map_idx_20_to_34()

static void map_idx_20_to_34 ( int8_t *  par_mapped, const int8_t *  par, int  full  )

static

Definition at line 322 of file aacps.c.

Referenced by remap34().

map_val_20_to_34()

static void map_val_20_to_34 ( INTFLOAT  par[PS_MAX_NR_IIDICC] )

static

Definition at line 362 of file aacps.c.

Referenced by stereo_processing().

decorrelation()

static void decorrelation ( PSContext *  ps, INTFLOAT(*)  out[32][2], const INTFLOAT(*)  s[32][2], int  is34  )

static

< Smoothing coefficient

Definition at line 399 of file aacps.c.

Referenced by ff_ps_apply().

remap34()

static void remap34 ( int8_t(**)  p_par_mapped[PS_MAX_NR_IIDICC], int8_t(*)  par[PS_MAX_NR_IIDICC], int  num_par, int  num_env, int  full  )

static

Definition at line 519 of file aacps.c.

Referenced by stereo_processing().

remap20()

static void remap20 ( int8_t(**)  p_par_mapped[PS_MAX_NR_IIDICC], int8_t(*)  par[PS_MAX_NR_IIDICC], int  num_par, int  num_env, int  full  )

static

Definition at line 538 of file aacps.c.

Referenced by stereo_processing().

stereo_processing()

static void stereo_processing ( PSContext *  ps, INTFLOAT(*)  l[32][2], INTFLOAT(*)  r[32][2], int  is34  )

static

Definition at line 557 of file aacps.c.

Referenced by ff_ps_apply().

ff_ps_apply()

int AAC_RENAME() ff_ps_apply	(	PSContext *	ps,
		INTFLOAT	L[2][38][64],
		INTFLOAT	R[2][38][64],
		int	top
	)

Definition at line 719 of file aacps.c.

Referenced by ff_sbr_apply().

ff_ps_init()

av_cold void AAC_RENAME() ff_ps_init

(

void

)

Definition at line 740 of file aacps.c.

Referenced by ff_aac_sbr_init().

Variable Documentation

g1_Q2

const INTFLOAT g1_Q2[]

static

Initial value:

= {
    Q31(0.0f),  Q31(0.01899487526049f), Q31(0.0f), Q31(-0.07293139167538f),
    Q31(0.0f),  Q31(0.30596630545168f), Q31(0.5f)
}

Definition at line 37 of file aacps.c.

Referenced by hybrid_analysis().

NR_PAR_BANDS

const int NR_PAR_BANDS[] = { 20, 34 }

static

Number of frequency bands that can be addressed by the parameter index, b(k)

Definition at line 189 of file aacps.c.

Referenced by decorrelation(), and stereo_processing().

NR_IPDOPD_BANDS

const int NR_IPDOPD_BANDS[] = { 11, 17 }

static

Definition at line 190 of file aacps.c.

Referenced by stereo_processing().

NR_BANDS

const int NR_BANDS[] = { 71, 91 }

static

Number of frequency bands that can be addressed by the sub subband index, k.

Definition at line 192 of file aacps.c.

Referenced by decorrelation(), ff_ps_apply(), and stereo_processing().

DECAY_CUTOFF

const int DECAY_CUTOFF[] = { 10, 32 }

static

Start frequency band for the all-pass filter decay slope.

Definition at line 194 of file aacps.c.

Referenced by decorrelation().

NR_ALLPASS_BANDS

const int NR_ALLPASS_BANDS[] = { 30, 50 }

static

Number of all-pass filer bands.

Definition at line 196 of file aacps.c.

Referenced by decorrelation(), and ff_ps_apply().

SHORT_DELAY_BAND

const int SHORT_DELAY_BAND[] = { 42, 62 }

static

First stereo band using the short one sample delay.

Definition at line 198 of file aacps.c.

Referenced by decorrelation().