dolby_e.h File Reference

#include "libavutil/float_dsp.h"
#include "libavutil/libm.h"
#include "libavutil/mem.h"
#include "internal.h"
#include "get_bits.h"
#include "kbdwin.h"
#include "fft.h"

Go to the source code of this file.

Data Structures
struct	DBEGroup
struct	DBEChannel
struct	DBEContext

Macros
#define	FRAME_SAMPLES   1792
#define	MAX_PROG_CONF   23
#define	MAX_PROGRAMS   8
#define	MAX_CHANNELS   8
#define	MAX_SEGMENTS   2
#define	MAX_GROUPS   8
#define	MAX_EXPONENTS   304
#define	MAX_MANTISSAS   1024
#define	MAX_MSTR_EXP   2
#define	MAX_BIAS_EXP   50

Functions
static av_cold void	init_tables (void)

Variables
static const uint8_t	nb_programs_tab [MAX_PROG_CONF+1]
static const uint8_t	nb_channels_tab [MAX_PROG_CONF+1]
static const int8_t	lfe_channel_tab [MAX_PROG_CONF+1]
static const uint8_t	ch_reorder_4 [4] = { 0, 2, 1, 3 }
static const uint8_t	ch_reorder_6 [6] = { 0, 2, 4, 1, 3, 5 }
static const uint8_t	ch_reorder_8 [8] = { 0, 2, 6, 4, 1, 3, 7, 5 }
static const uint8_t	ch_reorder_n [8] = { 0, 2, 4, 6, 1, 3, 5, 7 }
static const uint16_t	sample_rate_tab [16]
static const uint8_t	nb_groups_tab [4] = { 1, 8, 7, 1 }
static const uint8_t	nb_mstr_exp_tab [4] = { 2, 2, 2, 1 }
static const uint8_t	nb_mantissa_38 [38]
static const uint8_t	nb_mantissa_44 [44]
static const uint8_t	nb_mantissa_50 [50]
static const uint8_t	imdct_bits_tab [3] = { 8, 9, 11 }
static const DBEGroup	grp_tab_0 [1]
static const DBEGroup	grp_tab_1 [8]
static const DBEGroup	grp_tab_2 [7]
static const DBEGroup	grp_tab_3 [1]
static const DBEGroup	grp_tab_4 [1]
static const DBEGroup	grp_tab_5 [8]
static const DBEGroup	grp_tab_6 [7]
static const DBEGroup	grp_tab_7 [1]
static const DBEGroup *const	frm_ofs_tab [2][4]
static const uint8_t	mantissa_size1 [16][4]
static const uint8_t	mantissa_size2 [16][4]
static const float	start_window [192]
static const float	short_window2 [192]
static const float	short_window3 [64]
static const uint8_t	dc_code_tab [5] = { 0, 0, 0, 1, 1 }
static const uint8_t	ht_code_tab [5] = { 0, 0, 1, 2, 2 }
static const uint8_t	band_ofs_tab [3][4]
static const uint8_t	band_low_tab [3] = { 9, 17, 24 }
static const uint16_t	fast_gain_tab [8]
static const uint16_t	slow_decay_tab [2][2] = { { 27, -1 }, { 32, 21 } }
static const uint16_t	misc_decay_tab [3][2][2]
static const uint16_t	fast_decay_tab [3][2][2][50]
static const uint16_t	fast_gain_adj_tab [3][2][62]
static const uint16_t	slow_gain_tab [3][2][50]
static const uint16_t	hearing_thresh_tab [3][3][50]
static const int16_t	lwc_gain_tab [11][7]
static const int16_t	lwc_adj_tab [7]
static const uint8_t	log_add_tab [212]
static const uint8_t	bap_tab [64]
static float	mantissa_tab1 [17][4]
static float	mantissa_tab2 [17][4]
static float	mantissa_tab3 [17][4]
static float	exponent_tab [50]
static float	gain_tab [1024]
static float	window [3712]

Macro Definition Documentation

#define FRAME_SAMPLES   1792

Definition at line 33 of file dolby_e.h.

Referenced by apply_gain(), and filter_frame().

#define MAX_PROG_CONF   23

Definition at line 35 of file dolby_e.h.

Referenced by parse_metadata().

#define MAX_PROGRAMS   8

Definition at line 36 of file dolby_e.h.

#define MAX_CHANNELS   8

Definition at line 37 of file dolby_e.h.

#define MAX_SEGMENTS   2

Definition at line 38 of file dolby_e.h.

#define MAX_GROUPS   8

Definition at line 40 of file dolby_e.h.

Referenced by parse_bit_alloc().

#define MAX_EXPONENTS   304

Definition at line 41 of file dolby_e.h.

#define MAX_MANTISSAS   1024

Definition at line 42 of file dolby_e.h.

#define MAX_MSTR_EXP   2

Definition at line 44 of file dolby_e.h.

Referenced by unbias_exponents().

#define MAX_BIAS_EXP   50

Definition at line 45 of file dolby_e.h.

Referenced by bit_allocate(), and unbias_exponents().

Function Documentation

static av_cold void init_tables ( void  )

static

Definition at line 647 of file dolby_e.h.

Variable Documentation

const uint8_t nb_programs_tab[MAX_PROG_CONF+1]

static

Initial value:

= {
    2, 3, 2, 3, 4, 5, 4, 5, 6, 7, 8, 1, 2, 3, 3, 4, 5, 6, 1, 2, 3, 4, 1, 1
}

Definition at line 115 of file dolby_e.h.

Referenced by parse_metadata().

const uint8_t nb_channels_tab[MAX_PROG_CONF+1]

static

Initial value:

= {
    8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 8, 8
}

Definition at line 119 of file dolby_e.h.

Referenced by parse_metadata().

const int8_t lfe_channel_tab[MAX_PROG_CONF+1]

static

Initial value:

= {
     5,  5, -1, -1, -1, -1, -1, -1, -1, -1, -1, 4,
    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,  5, 5
}

Definition at line 123 of file dolby_e.h.

Referenced by parse_channel().

const uint8_t ch_reorder_4[4] = { 0, 2, 1, 3 }

static

Definition at line 128 of file dolby_e.h.

Referenced by filter_frame().

const uint8_t ch_reorder_6[6] = { 0, 2, 4, 1, 3, 5 }

static

Definition at line 129 of file dolby_e.h.

Referenced by filter_frame().

const uint8_t ch_reorder_8[8] = { 0, 2, 6, 4, 1, 3, 7, 5 }

static

Definition at line 130 of file dolby_e.h.

Referenced by filter_frame().

const uint8_t ch_reorder_n[8] = { 0, 2, 4, 6, 1, 3, 5, 7 }

static

Definition at line 131 of file dolby_e.h.

Referenced by filter_frame().

const uint16_t sample_rate_tab[16]

static

Initial value:

= {
    0, 42965, 43008, 44800, 53706, 53760
}

Definition at line 133 of file dolby_e.h.

Referenced by dolby_e_decode_frame(), and parse_metadata().

const uint8_t nb_groups_tab[4] = { 1, 8, 7, 1 }

static

Definition at line 137 of file dolby_e.h.

Referenced by parse_channel().

const uint8_t nb_mstr_exp_tab[4] = { 2, 2, 2, 1 }

static

Definition at line 139 of file dolby_e.h.

Referenced by parse_channel().

const uint8_t nb_mantissa_38[38]

static

Initial value:

= {
     1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,
     2,  2,  2,  2,  2,  2,  3,  3,  3,  4,  4,  4,  5,  5,  6,  6,
     7,  8,  9, 10, 11, 12,
}

Definition at line 141 of file dolby_e.h.

const uint8_t nb_mantissa_44[44]

static

Initial value:

= {
     1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  2,
     2,  2,  2,  2,  2,  3,  3,  3,  3,  4,  4,  5,  5,  6,  7,  7,
     8,  9, 10, 11, 12, 13, 15, 16, 18, 20, 22, 25,
}

Definition at line 147 of file dolby_e.h.

const uint8_t nb_mantissa_50[50]

static

Initial value:

= {
     1,  1,  1,  1,  1,  1,  1,  1,  2,  2,  2,  2,  2,  3,  3,  3,
     3,  4,  4,  5,  5,  6,  6,  7,  8,  9,  9, 10, 12, 13, 14, 16,
    18, 19, 22, 24, 27, 29, 32, 36, 40, 44, 49, 54, 60, 66, 74, 82,
    90, 100,
}

Definition at line 153 of file dolby_e.h.

const uint8_t imdct_bits_tab[3] = { 8, 9, 11 }

static

Definition at line 160 of file dolby_e.h.

Referenced by dolby_e_init(), and imdct_calc().

const DBEGroup grp_tab_0[1]

static

Initial value:

= {
    { 50, { 27, 23 }, 0, 0, nb_mantissa_50, 2, 0, 1152, 0, 1408, 0 },
}

Definition at line 162 of file dolby_e.h.

const DBEGroup grp_tab_1[8]

static

Initial value:

= {
    { 38, { 12, 26 }, 0, 0, nb_mantissa_38, 0, 0, 192, 0, 256, 0 },
    { 38, { 12, 26 }, 38, 128, nb_mantissa_38, 0, 1, 256, 64, 448, 0 },
    { 38, { 12, 26 }, 76, 256, nb_mantissa_38, 0, 1, 256, 192, 704, 0 },
    { 38, { 12, 26 }, 114, 384, nb_mantissa_38, 0, 1, 256, 320, 0, 0 },
    { 38, { 12, 26 }, 152, 512, nb_mantissa_38, 0, 1, 256, 448, 0, 0 },
    { 38, { 12, 26 }, 190, 640, nb_mantissa_38, 0, 1, 256, 576, 0, 0 },
    { 38, { 12, 26 }, 228, 768, nb_mantissa_38, 0, 1, 256, 704, 0, 0 },
    { 38, { 12, 26 }, 266, 896, nb_mantissa_38, 0, 1, 256, 832, 0, 0 },
}

Definition at line 166 of file dolby_e.h.

const DBEGroup grp_tab_2[7]

static

Initial value:

= {
    { 38, { 12, 26 }, 0, 0, nb_mantissa_38, 0, 0, 192, 0, 256, 0 },
    { 38, { 12, 26 }, 38, 128, nb_mantissa_38, 0, 1, 256, 64, 448, 0 },
    { 38, { 12, 26 }, 76, 256, nb_mantissa_38, 0, 1, 256, 192, 704, 0 },
    { 38, { 12, 26 }, 114, 384, nb_mantissa_38, 0, 1, 256, 320, 0, 0 },
    { 38, { 12, 26 }, 152, 512, nb_mantissa_38, 0, 1, 256, 448, 0, 0 },
    { 38, { 12, 26 }, 190, 640, nb_mantissa_38, 0, 1, 256, 576, 0, 0 },
    { 44, { 19, 25 }, 228, 768, nb_mantissa_44, 1, 1, 448, 704, 960, 64 },
}

Definition at line 177 of file dolby_e.h.

const DBEGroup grp_tab_3[1]

static

Initial value:

= {
    { 21, { 21 }, 0, 0, nb_mantissa_50, 2, 0, 1152, 0, 1408, 0 },
}

Definition at line 187 of file dolby_e.h.

const DBEGroup grp_tab_4[1]

static

Initial value:

= {
    { 50, { 27, 23 }, 0, 0, nb_mantissa_50, 2, 2, 1152, 0, 1408, 896 },
}

Definition at line 191 of file dolby_e.h.

const DBEGroup grp_tab_5[8]

static

Initial value:

= {
    { 38, { 12, 26 }, 0, 0, nb_mantissa_38, 0, 1, 256, 64, 0, 0 },
    { 38, { 12, 26 }, 38, 128, nb_mantissa_38, 0, 1, 256, 192, 0, 0 },
    { 38, { 12, 26 }, 76, 256, nb_mantissa_38, 0, 1, 256, 320, 0, 0 },
    { 38, { 12, 26 }, 114, 384, nb_mantissa_38, 0, 1, 256, 448, 0, 0 },
    { 38, { 12, 26 }, 152, 512, nb_mantissa_38, 0, 1, 256, 576, 0, 0 },
    { 38, { 12, 26 }, 190, 640, nb_mantissa_38, 0, 1, 256, 704, 3008, 0 },
    { 38, { 12, 26 }, 228, 768, nb_mantissa_38, 0, 1, 256, 832, 2752, 0 },
    { 38, { 12, 26 }, 266, 896, nb_mantissa_38, 0, 2, 192, 960, 2560, 64 },
}

Definition at line 195 of file dolby_e.h.

const DBEGroup grp_tab_6[7]

static

Initial value:

= {
    { 44, { 19, 25 }, 0, 0, nb_mantissa_44, 1, 1, 448, 0, 3264, 0 },
    { 38, { 12, 26 }, 44, 256, nb_mantissa_38, 0, 1, 256, 320, 0, 0 },
    { 38, { 12, 26 }, 82, 384, nb_mantissa_38, 0, 1, 256, 448, 0, 0 },
    { 38, { 12, 26 }, 120, 512, nb_mantissa_38, 0, 1, 256, 576, 0, 0 },
    { 38, { 12, 26 }, 158, 640, nb_mantissa_38, 0, 1, 256, 704, 3008, 0 },
    { 38, { 12, 26 }, 196, 768, nb_mantissa_38, 0, 1, 256, 832, 2752, 0 },
    { 38, { 12, 26 }, 234, 896, nb_mantissa_38, 0, 2, 192, 960, 2560, 64 },
}

Definition at line 206 of file dolby_e.h.

const DBEGroup grp_tab_7[1]

static

Initial value:

= {
    { 21, { 21 }, 0, 0, nb_mantissa_50, 2, 2, 1152, 0, 1408, 896 },
}

Definition at line 216 of file dolby_e.h.

const DBEGroup* const frm_ofs_tab[2][4]

static

Initial value:

= {
    { grp_tab_0, grp_tab_1, grp_tab_2, grp_tab_3 },
    { grp_tab_4, grp_tab_5, grp_tab_6, grp_tab_7 }
}

Definition at line 220 of file dolby_e.h.

Referenced by parse_channel().

const uint8_t mantissa_size1[16][4]

static

Initial value:

= {
    {  0,  0,  0,  0 }, {  2,  1,  1,  1 }, {  3,  2,  1,  1 }, {  4,  3,  2,  1 },
    {  5,  4,  3,  2 }, {  6,  5,  4,  3 }, {  7,  6,  5,  4 }, {  8,  7,  6,  5 },
    {  9,  8,  7,  6 }, { 10,  9,  8,  7 }, { 11, 10,  9,  8 }, { 12, 11, 10,  9 },
    { 13, 12, 11, 10 }, { 14, 13, 12, 11 }, { 15, 14, 13, 12 }, { 16, 15, 14, 13 },
}

Definition at line 225 of file dolby_e.h.

Referenced by parse_mantissas().

const uint8_t mantissa_size2[16][4]

static

Initial value:

= {
    {  0,  0,  0,  0 }, {  2,  1,  2,  2 }, {  3,  2,  3,  3 }, {  4,  3,  4,  4 },
    {  5,  4,  5,  5 }, {  6,  5,  6,  6 }, {  7,  6,  7,  7 }, {  8,  7,  8,  8 },
    {  9,  8,  9,  9 }, { 10,  9, 10, 10 }, { 11, 10, 11, 11 }, { 12, 11, 12, 12 },
    { 13, 12, 13, 13 }, { 14, 13, 14, 14 }, { 15, 14, 15, 15 }, { 16, 15, 16, 16 },
}

Definition at line 232 of file dolby_e.h.

Referenced by parse_mantissas().

const float start_window[192]

static

Definition at line 239 of file dolby_e.h.

Referenced by init_tables().

const float short_window2[192]

static

Definition at line 292 of file dolby_e.h.

Referenced by init_tables().

const float short_window3[64]

static

Initial value:

= {
    0.00326887936450, 0.00550242900936, 0.00786846643791, 0.01045683453520,
    0.01330402120132, 0.01643221072863, 0.01985798040609, 0.02359509464766,
    0.02765559221954, 0.03205025893128, 0.03678884369614, 0.04188015679495,
    0.04733210987781, 0.05315172583924, 0.05934513287609, 0.06591755045290,
    0.07287327156378, 0.08021564389822, 0.08794705152307, 0.09606889811179,
    0.10458159240070, 0.11348453632940, 0.12277611617809, 0.13245369691511,
    0.14251361989876, 0.15295120402567, 0.16376075037904, 0.17493555039885,
    0.18646789757072, 0.19834910260891, 0.21056951208995, 0.22311853047787,
    0.23598464546683, 0.24915545655419, 0.26261770674500, 0.27635731727778,
    0.29035942525136, 0.30460842402318, 0.31908800624032, 0.33378120935681,
    0.34867046348260, 0.36373764140285, 0.37896411059909, 0.39433078709788,
    0.40981819096657, 0.42540650327031, 0.44107562429959, 0.45680523287270,
    0.47257484651351, 0.48836388230077, 0.50415171818214, 0.51991775454258,
    0.53564147581496, 0.55130251191887, 0.56688069931047, 0.58235614142007,
    0.59770926827271, 0.61292089506118, 0.62797227945823, 0.64284517745255,
    0.65752189749349, 0.67198535273209, 0.68621911114984, 0.70020744337099,
}

Definition at line 345 of file dolby_e.h.

Referenced by init_tables().

const uint8_t dc_code_tab[5] = { 0, 0, 0, 1, 1 }

static

Definition at line 364 of file dolby_e.h.

Referenced by bit_allocate().

const uint8_t ht_code_tab[5] = { 0, 0, 1, 2, 2 }

static

Definition at line 366 of file dolby_e.h.

Referenced by bit_allocate().

const uint8_t band_ofs_tab[3][4]

static

Initial value:

= {
    { 12, 8, 4, 0 }, { 14, 10, 6, 0 }, { 12, 8, 4, 0 }
}

Definition at line 368 of file dolby_e.h.

Referenced by bit_allocate().

const uint8_t band_low_tab[3] = { 9, 17, 24 }

static

Definition at line 372 of file dolby_e.h.

Referenced by bit_allocate().

const uint16_t fast_gain_tab[8]

static

Initial value:

= {
    128, 256, 384, 512, 640, 768, 896, 1024
}

Definition at line 374 of file dolby_e.h.

Referenced by bit_allocate().

const uint16_t slow_decay_tab[2][2] = { { 27, -1 }, { 32, 21 } }

static

Definition at line 378 of file dolby_e.h.

Referenced by bit_allocate().

const uint16_t misc_decay_tab[3][2][2]

static

Initial value:

= {
    { { 354, -1 }, { 425, 425 } },
    { { 266, -1 }, { 320,  -1 } },
    { { 213, -1 }, { 256,  -1 } }
}

Definition at line 380 of file dolby_e.h.

Referenced by bit_allocate().

const uint16_t fast_decay_tab[3][2][2][50]

static

Definition at line 386 of file dolby_e.h.

Referenced by bit_allocate().

const uint16_t fast_gain_adj_tab[3][2][62]

static

Definition at line 458 of file dolby_e.h.

Referenced by bit_allocate().

const uint16_t slow_gain_tab[3][2][50]

static

Definition at line 504 of file dolby_e.h.

Referenced by bit_allocate().

const uint16_t hearing_thresh_tab[3][3][50]

static

Definition at line 542 of file dolby_e.h.

Referenced by bit_allocate().

const int16_t lwc_gain_tab[11][7]

static

Initial value:

= {
    {   -21,  -197,  -271,  -466, 32767, 32767, 32767 },
    {  -197,   -29,  -244,  -271,  -540, 32767, 32767 },
    {  -271,  -244,   -29,  -249,  -271,  -593, 32767 },
    {  -466,  -271,  -249,   -29,  -251,  -271,  -632 },
    {  -540,  -271,  -251,   -29,  -251,  -271,  -664 },
    {  -593,  -271,  -251,   -29,  -252,  -271,  -690 },
    {  -632,  -271,  -252,   -29,  -252,  -271,  -711 },
    {  -664,  -271,  -252,   -29,  -252,  -271,  -730 },
    {  -690,  -271,  -252,   -29,  -252,  -271,  -745 },
    {  -711,  -271,  -252,   -29,  -253,  -271,  -759 },
    {  -730,  -271,  -253,   -29,  -253,  -271,  -771 },
}

Definition at line 597 of file dolby_e.h.

Referenced by calc_lowcomp().

const int16_t lwc_adj_tab[7]

static

Initial value:

= {
    -192, -320, -448, -512, -448, -320, -192,
}

Definition at line 611 of file dolby_e.h.

Referenced by calc_lowcomp().

const uint8_t log_add_tab[212]

static

Initial value:

= {
    64, 63, 62, 61, 60, 59, 58, 57, 56, 55, 54, 53, 52, 52, 51, 50,
    49, 48, 47, 47, 46, 45, 44, 44, 43, 42, 41, 41, 40, 39, 38, 38,
    37, 36, 36, 35, 35, 34, 33, 33, 32, 32, 31, 30, 30, 29, 29, 28,
    28, 27, 27, 26, 26, 25, 25, 24, 24, 23, 23, 22, 22, 21, 21, 21,
    20, 20, 19, 19, 19, 18, 18, 18, 17, 17, 17, 16, 16, 16, 15, 15,
    15, 14, 14, 14, 13, 13, 13, 13, 12, 12, 12, 12, 11, 11, 11, 11,
    10, 10, 10, 10, 10,  9,  9,  9,  9,  9,  8,  8,  8,  8,  8,  8,
     7,  7,  7,  7,  7,  7,  6,  6,  6,  6,  6,  6,  6,  6,  5,  5,
     5,  5,  5,  5,  5,  5,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,
     4,  3,  3,  3,  3,  3,  3,  3,  3,  3,  3,  3,  3,  3,  3,  2,
     2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,
     2,  2,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,
     1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,
     1,  1,  0,  0,
}

Definition at line 615 of file dolby_e.h.

Referenced by log_add().

const uint8_t bap_tab[64]

static

Initial value:

= {
     0,  1,  1,  1,  1,  1,  2,  2,  2,  2,  2,  3,  3,  3,  3,  4,
     4,  4,  4,  5,  5,  5,  5,  6,  6,  6,  6,  7,  7,  7,  7,  8,
     8,  8,  8,  9,  9,  9,  9, 10, 10, 10, 10, 11, 11, 11, 11, 12,
    12, 12, 12, 13, 13, 13, 13, 14, 14, 14, 14, 15, 15, 15, 15, 15,
}

Definition at line 632 of file dolby_e.h.

Referenced by bit_allocate(), and decode_audio_block().

float mantissa_tab1[17][4]

static

Definition at line 639 of file dolby_e.h.

Referenced by init_tables(), and parse_mantissas().

float mantissa_tab2[17][4]

static

Definition at line 640 of file dolby_e.h.

Referenced by init_tables(), and parse_mantissas().

float mantissa_tab3[17][4]

static

Definition at line 641 of file dolby_e.h.

Referenced by init_tables(), and parse_mantissas().

float exponent_tab[50]

static

Definition at line 642 of file dolby_e.h.

Referenced by init_tables(), and parse_mantissas().

float gain_tab[1024]

static

Definition at line 643 of file dolby_e.h.

Referenced by apply_gain(), and init_tables().

float window[3712]

static

Definition at line 645 of file dolby_e.h.

Referenced by init_tables().