aacps.c File Reference

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

Go to the source code of this file.

Macros
#define	PS_BASELINE   0
	Operate in Baseline PS mode.
#define	numQMFSlots   32
#define	READ_PAR_DATA(PAR, OFFSET, MASK, ERR_CONDITION)
#define	DECAY_SLOPE   0.05f
	All-pass filter decay slope.
#define	PS_INIT_VLC_STATIC(num, size)
#define	PS_VLC_ROW(name)   { name ## _codes, name ## _bits, sizeof(name ## _codes), sizeof(name ## _codes[0]) }

Enumerations
enum	{   huff_iid_df1, huff_iid_dt1, huff_iid_df0, huff_iid_dt0,   huff_icc_df, huff_icc_dt, huff_ipd_df, huff_ipd_dt,   huff_opd_df, huff_opd_dt }

Functions
static int	read_iid_data (AVCodecContext *avctx, GetBitContext *gb, PSContext *ps, int8_t(*iid)[34], int table_idx, int e, int dt)
	\ * Read Inter-channel Intensity Difference/Inter-Channel Coherence/ \ * Inter-channel Phase Difference/Overall Phase Difference parameters from the \ * bitstream.
static int	read_icc_data (AVCodecContext *avctx, GetBitContext *gb, PSContext *ps, int8_t(*icc)[34], int table_idx, int e, int dt)
	\ * Read Inter-channel Intensity Difference/Inter-Channel Coherence/ \ * Inter-channel Phase Difference/Overall Phase Difference parameters from the \ * bitstream.
static int	read_ipdopd_data (AVCodecContext *avctx, GetBitContext *gb, PSContext *ps, int8_t(*ipdopd)[34], int table_idx, int e, int dt)
	\ * Read Inter-channel Intensity Difference/Inter-Channel Coherence/ \ * Inter-channel Phase Difference/Overall Phase Difference parameters from the \ * bitstream.
static int	ps_read_extension_data (GetBitContext *gb, PSContext *ps, int ps_extension_id)
static void	ipdopd_reset (int8_t *ipd_hist, int8_t *opd_hist)
int	ff_ps_read_data (AVCodecContext *avctx, GetBitContext *gb_host, PSContext *ps, int bits_left)
static void	hybrid2_re (float(*in)[2], float(*out)[32][2], const float filter[8], int len, int reverse)
	Split one subband into 2 subsubbands with a symmetric real filter.
static void	hybrid6_cx (PSDSPContext *dsp, float(*in)[2], float(*out)[32][2], const float(*filter)[8][2], int len)
	Split one subband into 6 subsubbands with a complex filter.
static void	hybrid4_8_12_cx (PSDSPContext *dsp, float(*in)[2], float(*out)[32][2], const float(*filter)[8][2], int N, int len)
static void	hybrid_analysis (PSDSPContext *dsp, float out[91][32][2], float in[5][44][2], float L[2][38][64], int is34, int len)
static void	hybrid_synthesis (PSDSPContext *dsp, float out[2][38][64], float 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.
static void	map_idx_34_to_20 (int8_t *par_mapped, const int8_t *par, int full)
static void	map_val_34_to_20 (float 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 (float par[PS_MAX_NR_IIDICC])
static void	decorrelation (PSContext *ps, float(*out)[32][2], const float(*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, float(*l)[32][2], float(*r)[32][2], int is34)
int	ff_ps_apply (AVCodecContext *avctx, PSContext *ps, float L[2][38][64], float R[2][38][64], int top)
av_cold void	ff_ps_init (void)
av_cold void	ff_ps_ctx_init (PSContext *ps)

Variables
static const int8_t	num_env_tab [2][4]
static const int8_t	nr_iidicc_par_tab []
static const int8_t	nr_iidopd_par_tab []
static const int	huff_iid []
static VLC	vlc_ps [10]
static const int	NR_PAR_BANDS [] = { 20, 34 }
	Number of frequency bands that can be addressed by the parameter index, b(k)
static const int	NR_BANDS [] = { 71, 91 }
	Number of frequency bands that can be addressed by the sub subband index, k.
static const int	DECAY_CUTOFF [] = { 10, 32 }
	Start frequency band for the all-pass filter decay slope.
static const int	NR_ALLPASS_BANDS [] = { 30, 50 }
	Number of all-pass filer bands.
static const int	SHORT_DELAY_BAND [] = { 42, 62 }
	First stereo band using the short one sample delay.

Macro Definition Documentation

#define PS_BASELINE   0

Operate in Baseline PS mode.

Baseline implies 10 or 20 stereo bands, mixing mode A, and no ipd/opd

Definition at line 32 of file aacps.c.

#define numQMFSlots   32

Definition at line 36 of file aacps.c.

#define READ_PAR_DATA	(		PAR,
			OFFSET,
			MASK,
			ERR_CONDITION
	)

Definition at line 73 of file aacps.c.

#define DECAY_SLOPE   0.05f

All-pass filter decay slope.

Definition at line 418 of file aacps.c.

#define PS_INIT_VLC_STATIC	(		num,
			size
	)

Value:

INIT_VLC_STATIC(&vlc_ps[num], 9, ps_tmp[num].table_size / ps_tmp[num].elem_size,    \
                    ps_tmp[num].ps_bits, 1, 1,                                          \
                    ps_tmp[num].ps_codes, ps_tmp[num].elem_size, ps_tmp[num].elem_size, \
                    size);

Definition at line 914 of file aacps.c.

#define PS_VLC_ROW

(

name

)

{ name ## _codes, name ## _bits, sizeof(name ## _codes), sizeof(name ## _codes[0]) }

Definition at line 920 of file aacps.c.

Enumeration Type Documentation

anonymous enum

Enumerator:

huff_iid_df1
huff_iid_dt1
huff_iid_df0
huff_iid_dt0
huff_icc_df
huff_icc_dt
huff_ipd_df
huff_ipd_dt
huff_opd_df
huff_opd_dt

Definition at line 51 of file aacps.c.

Function Documentation

static int read_iid_data ( AVCodecContext *  avctx, GetBitContext *  gb, PSContext *  ps, int8_t(*)  iid[34], int  table_idx, int  e, int  dt  )

static

\ * Read Inter-channel Intensity Difference/Inter-Channel Coherence/ \ * Inter-channel Phase Difference/Overall Phase Difference parameters from the \ * bitstream.

\ * \ *

Parameters

avctx	contains the current codec context \ *
gb	pointer to the input bitstream \ *
ps	pointer to the Parametric Stereo context \ *
iid	pointer to the parameter to be read \ *
e	envelope to decode \ *
dt	1: time delta-coded, 0: frequency delta-coded \

Definition at line 106 of file aacps.c.

static int read_icc_data ( AVCodecContext *  avctx, GetBitContext *  gb, PSContext *  ps, int8_t(*)  icc[34], int  table_idx, int  e, int  dt  )

static

\ * Read Inter-channel Intensity Difference/Inter-Channel Coherence/ \ * Inter-channel Phase Difference/Overall Phase Difference parameters from the \ * bitstream.

\ * \ *

Parameters

avctx	contains the current codec context \ *
gb	pointer to the input bitstream \ *
ps	pointer to the Parametric Stereo context \ *
icc	pointer to the parameter to be read \ *
e	envelope to decode \ *
dt	1: time delta-coded, 0: frequency delta-coded \

Definition at line 107 of file aacps.c.

static int read_ipdopd_data ( AVCodecContext *  avctx, GetBitContext *  gb, PSContext *  ps, int8_t(*)  ipdopd[34], int  table_idx, int  e, int  dt  )

static

\ * Read Inter-channel Intensity Difference/Inter-Channel Coherence/ \ * Inter-channel Phase Difference/Overall Phase Difference parameters from the \ * bitstream.

\ * \ *

Parameters

avctx	contains the current codec context \ *
gb	pointer to the input bitstream \ *
ps	pointer to the Parametric Stereo context \ *
ipdopd	pointer to the parameter to be read \ *
e	envelope to decode \ *
dt	1: time delta-coded, 0: frequency delta-coded \

Definition at line 108 of file aacps.c.

Referenced by ipdopd_reset().

static int ps_read_extension_data ( GetBitContext *  gb, PSContext *  ps, int  ps_extension_id  )

static

Definition at line 110 of file aacps.c.

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

static

Definition at line 131 of file aacps.c.

int ff_ps_read_data	(	AVCodecContext *	avctx,
		GetBitContext *	gb_host,
		PSContext *	ps,
		int	bits_left
	)

Definition at line 140 of file aacps.c.

Referenced by read_sbr_extension().

static void hybrid2_re ( float(*)  in[2], float(*)  out[32][2], const float  filter[8], 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 294 of file aacps.c.

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

static

Split one subband into 6 subsubbands with a complex filter.

Definition at line 314 of file aacps.c.

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

static

Definition at line 337 of file aacps.c.

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

static

Definition at line 346 of file aacps.c.

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

static

Definition at line 376 of file aacps.c.

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

static

Table 8.46.

Definition at line 431 of file aacps.c.

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

static

Definition at line 445 of file aacps.c.

static void map_val_34_to_20 ( float  par[PS_MAX_NR_IIDICC] )

static

Definition at line 471 of file aacps.c.

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

static

Definition at line 495 of file aacps.c.

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

static

Definition at line 537 of file aacps.c.

static void map_val_20_to_34 ( float  par[PS_MAX_NR_IIDICC] )

static

Definition at line 577 of file aacps.c.

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

static

< Smoothing coefficient

Definition at line 614 of file aacps.c.

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 698 of file aacps.c.

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 717 of file aacps.c.

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

static

Definition at line 736 of file aacps.c.

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

Definition at line 893 of file aacps.c.

Referenced by ff_sbr_apply().

av_cold void ff_ps_init

(

void

)

Definition at line 923 of file aacps.c.

Referenced by ff_aac_sbr_init().

av_cold void ff_ps_ctx_init

(

PSContext *

ps

)

Definition at line 955 of file aacps.c.

Referenced by ff_aac_sbr_ctx_init().

Variable Documentation

const int8_t num_env_tab[2][4]

static

Initial value:

= {
    { 0, 1, 2, 4, },
    { 1, 2, 3, 4, },
}

Definition at line 38 of file aacps.c.

const int8_t nr_iidicc_par_tab[]

static

Initial value:

= {
    10, 20, 34, 10, 20, 34,
}

Definition at line 43 of file aacps.c.

const int8_t nr_iidopd_par_tab[]

static

Initial value:

= {
     5, 11, 17,  5, 11, 17,
}

Definition at line 47 of file aacps.c.

const int huff_iid[]

static

Initial value:

= {
    huff_iid_df0,
    huff_iid_df1,
    huff_iid_dt0,
    huff_iid_dt1,
}

Definition at line 64 of file aacps.c.

VLC vlc_ps[10]

static

Definition at line 71 of file aacps.c.

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 420 of file aacps.c.

const int NR_BANDS[] = { 71, 91 }

static

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

Definition at line 422 of file aacps.c.

const int DECAY_CUTOFF[] = { 10, 32 }

static

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

Definition at line 424 of file aacps.c.

const int NR_ALLPASS_BANDS[] = { 30, 50 }

static

Number of all-pass filer bands.

Definition at line 426 of file aacps.c.

const int SHORT_DELAY_BAND[] = { 42, 62 }

static

First stereo band using the short one sample delay.

Definition at line 428 of file aacps.c.