ilbcdec.c File Reference

#include "libavutil/channel_layout.h"
#include "avcodec.h"
#include "internal.h"
#include "get_bits.h"
#include "ilbcdata.h"

Go to the source code of this file.

Data Structures
struct	ILBCFrame
struct	ILBCContext

Macros
#define	LPC_N_20MS   1
#define	LPC_N_30MS   2
#define	LPC_N_MAX   2
#define	LSF_NSPLIT   3
#define	NASUB_MAX   4
#define	LPC_FILTERORDER   10
#define	NSUB_MAX   6
#define	SUBL   40
#define	ST_MEM_L_TBL   85
#define	MEM_LF_TBL   147
#define	STATE_SHORT_LEN_20MS   57
#define	STATE_SHORT_LEN_30MS   58
#define	BLOCKL_MAX   240
#define	CB_MEML   147
#define	CB_NSTAGES   3
#define	CB_HALFFILTERLEN   4
#define	CB_FILTERLEN   8
#define	ENH_NBLOCKS_TOT   8
#define	ENH_BLOCKL   80
#define	ENH_BUFL   (ENH_NBLOCKS_TOT)*ENH_BLOCKL
#define	ENH_BUFL_FILTEROVERHEAD   3
#define	BLOCKL_MAX   240
#define	NSUB_20MS   4
#define	NSUB_30MS   6
#define	NSUB_MAX   6
#define	NASUB_20MS   2
#define	NASUB_30MS   4
#define	NASUB_MAX   4
#define	STATE_LEN   80
#define	STATE_SHORT_LEN_30MS   58
#define	STATE_SHORT_LEN_20MS   57
#define	SPL_MUL_16_16(a, b)   ((int32_t) (((int16_t)(a)) * ((int16_t)(b))))
#define	SPL_MUL_16_16_RSFT(a, b, c)   (SPL_MUL_16_16(a, b) >> (c))
#define	SPL_SHIFT_W32(x, c)   (((c) >= 0) ? ((x) << (c)) : ((x) >> (-(c))))

Functions
static int	unpack_frame (ILBCContext *s)
static void	index_conv (int16_t *index)
static void	lsf_dequantization (int16_t *lsfdeq, int16_t *index, int16_t lpc_n)
static void	lsf_check_stability (int16_t *lsf, int dim, int nb_vectors)
static void	lsf_interpolate (int16_t *out, int16_t *in1, int16_t *in2, int16_t coef, int size)
static void	lsf2lsp (int16_t *lsf, int16_t *lsp, int order)
static void	get_lsp_poly (int16_t *lsp, int32_t *f)
static void	lsf2poly (int16_t *a, int16_t *lsf)
static void	lsp_interpolate2polydec (int16_t *a, int16_t *lsf1, int16_t *lsf2, int coef, int length)
static void	bw_expand (int16_t *out, const int16_t *in, const int16_t *coef, int length)
static void	lsp_interpolate (int16_t *syntdenum, int16_t *weightdenum, int16_t *lsfdeq, int16_t length, ILBCContext *s)
static void	filter_mafq12 (int16_t *in_ptr, int16_t *out_ptr, int16_t *B, int16_t B_length, int16_t length)
static void	filter_arfq12 (const int16_t *data_in, int16_t *data_out, const int16_t *coefficients, int coefficients_length, int data_length)
static void	state_construct (int16_t ifm, int16_t *idx, int16_t *synt_denum, int16_t *Out_fix, int16_t len)
static int16_t	gain_dequantization (int index, int max_in, int stage)
static void	vector_rmultiplication (int16_t *out, const int16_t *in, const int16_t *win, int length, int shift)
static void	vector_multiplication (int16_t *out, const int16_t *in, const int16_t *win, int length, int shift)
static void	add_vector_and_shift (int16_t *out, const int16_t *in1, const int16_t *in2, int length, int shift)
static void	create_augmented_vector (int index, int16_t *buffer, int16_t *cbVec)
static void	get_codebook (int16_t *cbvec, int16_t *mem, int16_t index, int16_t lMem, int16_t cbveclen)
static void	construct_vector (int16_t *decvector, int16_t *index, int16_t *gain_index, int16_t *mem, int16_t lMem, int16_t veclen)
static void	reverse_memcpy (int16_t *dest, int16_t *source, int length)
static void	decode_residual (ILBCContext *s, ILBCFrame *encbits, int16_t *decresidual, int16_t *syntdenum)
static int16_t	max_abs_value_w16 (const int16_t *vector, int length)
static int16_t	get_size_in_bits (uint32_t n)
static int32_t	scale_dot_product (const int16_t *v1, const int16_t *v2, int length, int scaling)
static void	correlation (int32_t *corr, int32_t *ener, int16_t *buffer, int16_t lag, int16_t blen, int16_t srange, int16_t scale)
static int16_t	norm_w32 (int32_t a)
static int32_t	div_w32_w16 (int32_t num, int16_t den)
static void	do_plc (int16_t *plc_residual, int16_t *plc_lpc, int16_t PLI, int16_t *decresidual, int16_t *lpc, int16_t inlag, ILBCContext *s)
static int	xcorr_coeff (int16_t *target, int16_t *regressor, int16_t subl, int16_t searchLen, int16_t offset, int16_t step)
static void	hp_output (int16_t *signal, const int16_t *ba, int16_t *y, int16_t *x, int16_t len)
static int	ilbc_decode_frame (AVCodecContext *avctx, void *data, int *got_frame_ptr, AVPacket *avpkt)
static av_cold int	ilbc_decode_init (AVCodecContext *avctx)

Variables
const AVCodec	ff_ilbc_decoder

Macro Definition Documentation

LPC_N_20MS

#define LPC_N_20MS   1

Definition at line 39 of file ilbcdec.c.

LPC_N_30MS

#define LPC_N_30MS   2

Definition at line 40 of file ilbcdec.c.

LPC_N_MAX

#define LPC_N_MAX   2

Definition at line 41 of file ilbcdec.c.

LSF_NSPLIT

#define LSF_NSPLIT   3

Definition at line 42 of file ilbcdec.c.

NASUB_MAX [1/2]

#define NASUB_MAX   4

Definition at line 69 of file ilbcdec.c.

LPC_FILTERORDER

#define LPC_FILTERORDER   10

Definition at line 44 of file ilbcdec.c.

NSUB_MAX [1/2]

#define NSUB_MAX   6

Definition at line 66 of file ilbcdec.c.

SUBL

#define SUBL   40

Definition at line 46 of file ilbcdec.c.

ST_MEM_L_TBL

#define ST_MEM_L_TBL   85

Definition at line 48 of file ilbcdec.c.

MEM_LF_TBL

#define MEM_LF_TBL   147

Definition at line 49 of file ilbcdec.c.

STATE_SHORT_LEN_20MS [1/2]

#define STATE_SHORT_LEN_20MS   57

Definition at line 72 of file ilbcdec.c.

STATE_SHORT_LEN_30MS [1/2]

#define STATE_SHORT_LEN_30MS   58

Definition at line 71 of file ilbcdec.c.

BLOCKL_MAX [1/2]

#define BLOCKL_MAX   240

Definition at line 63 of file ilbcdec.c.

CB_MEML

#define CB_MEML   147

Definition at line 54 of file ilbcdec.c.

CB_NSTAGES

#define CB_NSTAGES   3

Definition at line 55 of file ilbcdec.c.

CB_HALFFILTERLEN

#define CB_HALFFILTERLEN   4

Definition at line 56 of file ilbcdec.c.

CB_FILTERLEN

#define CB_FILTERLEN   8

Definition at line 57 of file ilbcdec.c.

ENH_NBLOCKS_TOT

#define ENH_NBLOCKS_TOT   8

Definition at line 59 of file ilbcdec.c.

ENH_BLOCKL

#define ENH_BLOCKL   80

Definition at line 60 of file ilbcdec.c.

ENH_BUFL

#define ENH_BUFL   (ENH_NBLOCKS_TOT)*ENH_BLOCKL

Definition at line 61 of file ilbcdec.c.

ENH_BUFL_FILTEROVERHEAD

#define ENH_BUFL_FILTEROVERHEAD   3

Definition at line 62 of file ilbcdec.c.

BLOCKL_MAX [2/2]

#define BLOCKL_MAX   240

Definition at line 63 of file ilbcdec.c.

NSUB_20MS

#define NSUB_20MS   4

Definition at line 64 of file ilbcdec.c.

NSUB_30MS

#define NSUB_30MS   6

Definition at line 65 of file ilbcdec.c.

NSUB_MAX [2/2]

#define NSUB_MAX   6

Definition at line 66 of file ilbcdec.c.

NASUB_20MS

#define NASUB_20MS   2

Definition at line 67 of file ilbcdec.c.

NASUB_30MS

#define NASUB_30MS   4

Definition at line 68 of file ilbcdec.c.

NASUB_MAX [2/2]

#define NASUB_MAX   4

Definition at line 69 of file ilbcdec.c.

STATE_LEN

#define STATE_LEN   80

Definition at line 70 of file ilbcdec.c.

STATE_SHORT_LEN_30MS [2/2]

#define STATE_SHORT_LEN_30MS   58

Definition at line 71 of file ilbcdec.c.

STATE_SHORT_LEN_20MS [2/2]

#define STATE_SHORT_LEN_20MS   57

Definition at line 72 of file ilbcdec.c.

SPL_MUL_16_16

#define SPL_MUL_16_16	(		a,
			b
	)		((int32_t) (((int16_t)(a)) * ((int16_t)(b))))

Definition at line 74 of file ilbcdec.c.

SPL_MUL_16_16_RSFT

#define SPL_MUL_16_16_RSFT	(		a,
			b,
			c
	)		(SPL_MUL_16_16(a, b) >> (c))

Definition at line 75 of file ilbcdec.c.

SPL_SHIFT_W32

#define SPL_SHIFT_W32	(		x,
			c
	)		(((c) >= 0) ? ((x) << (c)) : ((x) >> (-(c))))

Definition at line 929 of file ilbcdec.c.

Function Documentation

unpack_frame()

static int unpack_frame ( ILBCContext *  s )

static

Definition at line 129 of file ilbcdec.c.

Referenced by ilbc_decode_frame().

index_conv()

static void index_conv ( int16_t *  index )

static

Definition at line 269 of file ilbcdec.c.

Referenced by ilbc_decode_frame().

lsf_dequantization()

static void lsf_dequantization ( int16_t *  lsfdeq, int16_t *  index, int16_t  lpc_n  )

static

Definition at line 282 of file ilbcdec.c.

Referenced by ilbc_decode_frame().

lsf_check_stability()

static void lsf_check_stability ( int16_t *  lsf, int  dim, int  nb_vectors  )

static

Definition at line 310 of file ilbcdec.c.

Referenced by ilbc_decode_frame().

lsf_interpolate()

static void lsf_interpolate ( int16_t *  out, int16_t *  in1, int16_t *  in2, int16_t  coef, int  size  )

static

Definition at line 333 of file ilbcdec.c.

Referenced by lsp_interpolate2polydec().

lsf2lsp()

static void lsf2lsp ( int16_t *  lsf, int16_t *  lsp, int  order  )

static

Definition at line 343 of file ilbcdec.c.

Referenced by lsf2poly().

get_lsp_poly()

static void get_lsp_poly ( int16_t *  lsp, int32_t *  f  )

static

Definition at line 366 of file ilbcdec.c.

Referenced by lsf2poly().

lsf2poly()

static void lsf2poly ( int16_t *  a, int16_t *  lsf  )

static

Definition at line 393 of file ilbcdec.c.

Referenced by lsp_interpolate2polydec().

lsp_interpolate2polydec()

static void lsp_interpolate2polydec ( int16_t *  a, int16_t *  lsf1, int16_t *  lsf2, int  coef, int  length  )

static

Definition at line 420 of file ilbcdec.c.

Referenced by lsp_interpolate().

bw_expand()

static void bw_expand ( int16_t *  out, const int16_t *  in, const int16_t *  coef, int  length  )

static

Definition at line 429 of file ilbcdec.c.

Referenced by lsp_interpolate().

lsp_interpolate()

static void lsp_interpolate ( int16_t *  syntdenum, int16_t *  weightdenum, int16_t *  lsfdeq, int16_t  length, ILBCContext *  s  )

static

Definition at line 438 of file ilbcdec.c.

Referenced by ilbc_decode_frame().

filter_mafq12()

static void filter_mafq12 ( int16_t *  in_ptr, int16_t *  out_ptr, int16_t *  B, int16_t  B_length, int16_t  length  )

static

Definition at line 480 of file ilbcdec.c.

Referenced by get_codebook(), and state_construct().

filter_arfq12()

static void filter_arfq12 ( const int16_t *  data_in, int16_t *  data_out, const int16_t *  coefficients, int  coefficients_length, int  data_length  )

static

Definition at line 500 of file ilbcdec.c.

Referenced by ilbc_decode_frame(), and state_construct().

state_construct()

static void state_construct ( int16_t  ifm, int16_t *  idx, int16_t *  synt_denum, int16_t *  Out_fix, int16_t  len  )

static

Definition at line 522 of file ilbcdec.c.

Referenced by decode_residual().

gain_dequantization()

static int16_t gain_dequantization ( int  index, int  max_in, int  stage  )

static

Definition at line 601 of file ilbcdec.c.

Referenced by construct_vector().

vector_rmultiplication()

static void vector_rmultiplication ( int16_t *  out, const int16_t *  in, const int16_t *  win, int  length, int  shift  )

static

Definition at line 608 of file ilbcdec.c.

Referenced by create_augmented_vector().

vector_multiplication()

static void vector_multiplication ( int16_t *  out, const int16_t *  in, const int16_t *  win, int  length, int  shift  )

static

Definition at line 616 of file ilbcdec.c.

Referenced by create_augmented_vector().

add_vector_and_shift()

static void add_vector_and_shift ( int16_t *  out, const int16_t *  in1, const int16_t *  in2, int  length, int  shift  )

static

Definition at line 624 of file ilbcdec.c.

Referenced by create_augmented_vector().

create_augmented_vector()

static void create_augmented_vector ( int  index, int16_t *  buffer, int16_t *  cbVec  )

static

Definition at line 632 of file ilbcdec.c.

Referenced by get_codebook().

get_codebook()

static void get_codebook ( int16_t *  cbvec, int16_t *  mem, int16_t  index, int16_t  lMem, int16_t  cbveclen  )

static

Definition at line 647 of file ilbcdec.c.

Referenced by construct_vector().

construct_vector()

static void construct_vector ( int16_t *  decvector, int16_t *  index, int16_t *  gain_index, int16_t *  mem, int16_t  lMem, int16_t  veclen  )

static

Definition at line 716 of file ilbcdec.c.

Referenced by decode_residual().

reverse_memcpy()

static void reverse_memcpy ( int16_t *  dest, int16_t *  source, int  length  )

static

Definition at line 755 of file ilbcdec.c.

Referenced by decode_residual().

decode_residual()

static void decode_residual ( ILBCContext *  s, ILBCFrame *  encbits, int16_t *  decresidual, int16_t *  syntdenum  )

static

Definition at line 765 of file ilbcdec.c.

Referenced by ilbc_decode_frame().

max_abs_value_w16()

static int16_t max_abs_value_w16 ( const int16_t *  vector, int  length  )

static

Definition at line 866 of file ilbcdec.c.

Referenced by do_plc(), and xcorr_coeff().

get_size_in_bits()

static int16_t get_size_in_bits ( uint32_t  n )

static

Definition at line 884 of file ilbcdec.c.

Referenced by do_plc().

scale_dot_product()

static int32_t scale_dot_product ( const int16_t *  v1, const int16_t *  v2, int  length, int  scaling  )

static

Definition at line 903 of file ilbcdec.c.

Referenced by correlation(), do_plc(), and xcorr_coeff().

correlation()

static void correlation ( int32_t *  corr, int32_t *  ener, int16_t *  buffer, int16_t  lag, int16_t  blen, int16_t  srange, int16_t  scale  )

static

Definition at line 913 of file ilbcdec.c.

Referenced by do_plc(), and yae_align().

norm_w32()

static int16_t norm_w32 ( int32_t  a )

static

Definition at line 931 of file ilbcdec.c.

Referenced by do_plc(), and xcorr_coeff().

div_w32_w16()

static int32_t div_w32_w16 ( int32_t  num, int16_t  den  )

static

Definition at line 942 of file ilbcdec.c.

Referenced by do_plc().

do_plc()

static void do_plc ( int16_t *  plc_residual, int16_t *  plc_lpc, int16_t  PLI, int16_t *  decresidual, int16_t *  lpc, int16_t  inlag, ILBCContext *  s  )

static

Definition at line 950 of file ilbcdec.c.

Referenced by ilbc_decode_frame().

xcorr_coeff()

static int xcorr_coeff ( int16_t *  target, int16_t *  regressor, int16_t  subl, int16_t  searchLen, int16_t  offset, int16_t  step  )

static

Definition at line 1204 of file ilbcdec.c.

Referenced by ilbc_decode_frame().

hp_output()

static void hp_output ( int16_t *  signal, const int16_t *  ba, int16_t *  y, int16_t *  x, int16_t  len  )

static

Definition at line 1316 of file ilbcdec.c.

Referenced by ilbc_decode_frame().

ilbc_decode_frame()

static int ilbc_decode_frame ( AVCodecContext *  avctx, void *  data, int *  got_frame_ptr, AVPacket *  avpkt  )

static

Definition at line 1358 of file ilbcdec.c.

ilbc_decode_init()

static av_cold int ilbc_decode_init ( AVCodecContext *  avctx )

static

Definition at line 1446 of file ilbcdec.c.

Variable Documentation

ff_ilbc_decoder

const AVCodec ff_ilbc_decoder

Initial value:

= {
    .name           = "ilbc",
    .long_name      = NULL_IF_CONFIG_SMALL("iLBC (Internet Low Bitrate Codec)"),
    .type           = AVMEDIA_TYPE_AUDIO,
    .id             = AV_CODEC_ID_ILBC,
    .init           = ilbc_decode_init,
    .decode         = ilbc_decode_frame,
    .capabilities   = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_CHANNEL_CONF,
    .priv_data_size = sizeof(ILBCContext),
    .caps_internal  = FF_CODEC_CAP_INIT_THREADSAFE,
}

Definition at line 1481 of file ilbcdec.c.