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

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 (AVCodecContext avctx, PSContext ps, INTFLOAT L[2][38][64], INTFLOAT R[2][38][64], int top)

av_cold void AAC_RENAME()	ff_ps_init (void)

av_cold void AAC_RENAME()	ff_ps_ctx_init (PSContext *ps)

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 188 of file aacps.c.

Function Documentation

◆ ipdopd_reset()

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

static

Definition at line 43 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 54 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 81 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 105 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 116 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 146 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 202 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 216 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 242 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 281 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 323 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 363 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 400 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 520 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 539 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 558 of file aacps.c.

Referenced by ff_ps_apply().

◆ ff_ps_apply()

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

Definition at line 720 of file aacps.c.

Referenced by ff_sbr_apply().

◆ ff_ps_init()

av_cold void AAC_RENAME() ff_ps_init ( void )

Definition at line 741 of file aacps.c.

Referenced by ff_aac_sbr_init().

◆ ff_ps_ctx_init()

av_cold void AAC_RENAME() ff_ps_ctx_init ( PSContext * ps )

Definition at line 746 of file aacps.c.

Referenced by ff_aac_sbr_ctx_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 38 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 190 of file aacps.c.

Referenced by decorrelation(), and stereo_processing().

◆ NR_IPDOPD_BANDS

const int NR_IPDOPD_BANDS[] = { 11, 17 }

static

Definition at line 191 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 193 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 195 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 197 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 199 of file aacps.c.

Referenced by decorrelation().

Macros

Functions

Variables

Macro Definition Documentation

◆ DECAY_SLOPE

Function Documentation

◆ ipdopd_reset()

◆ hybrid2_re()

◆ hybrid6_cx()

◆ hybrid4_8_12_cx()

◆ hybrid_analysis()

◆ hybrid_synthesis()

◆ map_idx_10_to_20()

◆ map_idx_34_to_20()

◆ map_val_34_to_20()

◆ map_idx_10_to_34()

◆ map_idx_20_to_34()

◆ map_val_20_to_34()

◆ decorrelation()

◆ remap34()

◆ remap20()

◆ stereo_processing()

◆ ff_ps_apply()

◆ ff_ps_init()

◆ ff_ps_ctx_init()

Variable Documentation

◆ g1_Q2

◆ NR_PAR_BANDS

◆ NR_IPDOPD_BANDS

◆ NR_BANDS

◆ DECAY_CUTOFF

◆ NR_ALLPASS_BANDS

◆ SHORT_DELAY_BAND