#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"

Include dependency graph for aacps.c:

Macros
#define	PS_BASELINE 0
	Operate in Baseline PS mode. More...

#define	numQMFSlots 32

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

#define	DECAY_SLOPE 0.05f
	All-pass filter decay slope. More...

#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. More...

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. More...

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. More...

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. More...

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. More...

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. 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 (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) More...

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

#define DECAY_SLOPE 0.05f

All-pass filter decay slope.

Definition at line 429 of file aacps.c.

Referenced by decorrelation().

#define numQMFSlots 32

Definition at line 36 of file aacps.c.

Referenced by decorrelation(), and ff_ps_read_data().

#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.

Referenced by ff_ps_read_data(), and stereo_processing().

#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 925 of file aacps.c.

Referenced by ff_ps_init().

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

Definition at line 931 of file aacps.c.

Referenced by ff_ps_init().

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

Definition at line 73 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 void decorrelation	(	PSContext *	ps,
		float(*)	out[32][2],
		const float(*)	s[32][2],
		int	is34
	)

static

< Smoothing coefficient

Definition at line 625 of file aacps.c.

Referenced by ff_ps_apply().

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

Definition at line 904 of file aacps.c.

Referenced by ff_sbr_apply().

av_cold void ff_ps_ctx_init ( PSContext * ps )

Definition at line 966 of file aacps.c.

Referenced by ff_aac_sbr_ctx_init().

av_cold void ff_ps_init ( void )

Definition at line 934 of file aacps.c.

Referenced by ff_aac_sbr_init().

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

Definition at line 151 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 305 of file aacps.c.

Referenced by hybrid_analysis().

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 348 of file aacps.c.

Referenced by hybrid_analysis().

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 325 of file aacps.c.

Referenced by hybrid_analysis().

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 357 of file aacps.c.

Referenced by ff_ps_apply().

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

static

Definition at line 387 of file aacps.c.

Referenced by ff_ps_apply().

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

static

Definition at line 142 of file aacps.c.

Referenced by stereo_processing().

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

static

Table 8.46.

Definition at line 442 of file aacps.c.

Referenced by remap20().

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

static

Definition at line 506 of file aacps.c.

Referenced by remap34().

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

static

Definition at line 548 of file aacps.c.

Referenced by remap34().

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

static

Definition at line 456 of file aacps.c.

Referenced by remap20().

static void map_val_20_to_34 ( float par[PS_MAX_NR_IIDICC] )

static

Definition at line 588 of file aacps.c.

Referenced by stereo_processing().

static void map_val_34_to_20 ( float par[PS_MAX_NR_IIDICC] )

static

Definition at line 482 of file aacps.c.

Referenced by stereo_processing().

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

static

Definition at line 121 of file aacps.c.

Referenced by ff_ps_read_data().

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 118 of file aacps.c.

Referenced by ff_ps_read_data().

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 117 of file aacps.c.

Referenced by ff_ps_read_data().

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 119 of file aacps.c.

Referenced by ps_read_extension_data().

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 728 of file aacps.c.

Referenced by stereo_processing().

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 709 of file aacps.c.

Referenced by stereo_processing().

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

static

Definition at line 747 of file aacps.c.

Referenced by ff_ps_apply().

Variable Documentation

const int DECAY_CUTOFF[] = { 10, 32 }

static

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

Definition at line 435 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.

Referenced by ff_ps_read_data().

const int NR_ALLPASS_BANDS[] = { 30, 50 }

static

Number of all-pass filer bands.

Definition at line 437 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 433 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.

Referenced by ff_ps_read_data().

const int8_t nr_iidopd_par_tab[]

static

Initial value:

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

Definition at line 47 of file aacps.c.

Referenced by ff_ps_read_data().

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 431 of file aacps.c.

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.

Referenced by ff_ps_read_data().

const int SHORT_DELAY_BAND[] = { 42, 62 }

static

First stereo band using the short one sample delay.

Definition at line 439 of file aacps.c.

VLC vlc_ps[10]

static

Definition at line 71 of file aacps.c.

Paris Hackday Code

Macros

Enumerations

Functions

Variables

Macro Definition Documentation

Enumeration Type Documentation

Function Documentation

Variable Documentation