dolby_e.c File Reference

#include "libavutil/channel_layout.h"
#include "libavutil/float_dsp.h"
#include "libavutil/thread.h"
#include "libavutil/mem.h"
#include "libavutil/mem_internal.h"
#include "libavutil/opt.h"
#include "codec_internal.h"
#include "internal.h"
#include "get_bits.h"
#include "dolby_e.h"
#include "kbdwin.h"
#include "fft.h"

Go to the source code of this file.

Data Structures
struct	DBEGroup
struct	DBEChannel
struct	DBEDecodeContext

Macros
#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
#define	OFFSET(x)   offsetof(DBEDecodeContext, x)
#define	FLAGS   (AV_OPT_FLAG_DECODING_PARAM | AV_OPT_FLAG_AUDIO_PARAM)

Enumerations
enum	DBEOutputChannelOrder { CHANNEL_ORDER_DEFAULT, CHANNEL_ORDER_CODED }

Functions
static int	skip_input (DBEContext *s, int nb_words)
static int	parse_key (DBEContext *s)
static int	parse_metadata_ext (DBEDecodeContext *s1)
static void	unbias_exponents (DBEContext *s, DBEChannel *c, DBEGroup *g)
static int	parse_exponents (DBEContext *s, DBEChannel *c)
static int	log_add (int a, int b)
static void	calc_lowcomp (int *msk_val)
static void	bit_allocate (int nb_exponent, int nb_code, int fr_code, int *exp, int *bap, int fg_spc, int fg_ofs, int msk_mod, int snr_ofs)
static int	parse_bit_alloc (DBEDecodeContext *s1, DBEChannel *c)
static int	parse_indices (DBEContext *s, DBEChannel *c)
static int	parse_mantissas (DBEContext *s, DBEChannel *c)
static int	parse_channel (DBEDecodeContext *s1, int ch, int seg_id)
static int	parse_audio (DBEDecodeContext *s1, int start, int end, int seg_id)
static int	parse_meter (DBEDecodeContext *s1)
static void	imdct_calc (DBEDecodeContext *s1, DBEGroup *g, float *result, float *values)
static void	transform (DBEDecodeContext *s1, DBEChannel *c, float *history, float *output)
static void	apply_gain (DBEDecodeContext *s, int begin, int end, float *output)
static int	filter_frame (DBEDecodeContext *s, AVFrame *frame)
static int	dolby_e_decode_frame (AVCodecContext *avctx, AVFrame *frame, int *got_frame_ptr, AVPacket *avpkt)
static av_cold void	dolby_e_flush (AVCodecContext *avctx)
static av_cold int	dolby_e_close (AVCodecContext *avctx)
static av_cold void	init_tables (void)
static av_cold int	dolby_e_init (AVCodecContext *avctx)

Variables
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 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]
static const AVOption	options []
static const AVClass	dolby_e_decoder_class
const FFCodec	ff_dolby_e_decoder

Macro Definition Documentation

MAX_SEGMENTS

#define MAX_SEGMENTS   2

Definition at line 35 of file dolby_e.c.

MAX_GROUPS

#define MAX_GROUPS   8

Definition at line 37 of file dolby_e.c.

MAX_EXPONENTS

#define MAX_EXPONENTS   304

Definition at line 38 of file dolby_e.c.

MAX_MANTISSAS

#define MAX_MANTISSAS   1024

Definition at line 39 of file dolby_e.c.

MAX_MSTR_EXP

#define MAX_MSTR_EXP   2

Definition at line 41 of file dolby_e.c.

MAX_BIAS_EXP

#define MAX_BIAS_EXP   50

Definition at line 42 of file dolby_e.c.

OFFSET

#define OFFSET

(

x

)

offsetof(DBEDecodeContext, x)

Definition at line 1279 of file dolby_e.c.

FLAGS

#define FLAGS   (AV_OPT_FLAG_DECODING_PARAM | AV_OPT_FLAG_AUDIO_PARAM)

Definition at line 1280 of file dolby_e.c.

Enumeration Type Documentation

DBEOutputChannelOrder

enum DBEOutputChannelOrder

Enumerator
CHANNEL_ORDER_DEFAULT
CHANNEL_ORDER_CODED

Definition at line 44 of file dolby_e.c.

Function Documentation

skip_input()

static int skip_input ( DBEContext *  s, int  nb_words  )

static

Definition at line 613 of file dolby_e.c.

Referenced by parse_audio(), parse_key(), parse_metadata_ext(), and parse_meter().

parse_key()

static int parse_key ( DBEContext *  s )

static

Definition at line 625 of file dolby_e.c.

Referenced by amf_tag_skip(), and parse_audio().

parse_metadata_ext()

static int parse_metadata_ext ( DBEDecodeContext *  s1 )

static

Definition at line 637 of file dolby_e.c.

Referenced by dolby_e_decode_frame().

unbias_exponents()

static void unbias_exponents ( DBEContext *  s, DBEChannel *  c, DBEGroup *  g  )

static

Definition at line 645 of file dolby_e.c.

Referenced by parse_exponents().

parse_exponents()

static int parse_exponents ( DBEContext *  s, DBEChannel *  c  )

static

Definition at line 662 of file dolby_e.c.

Referenced by encode_block(), and parse_channel().

log_add()

static int log_add ( int  a, int  b  )

inlinestatic

Definition at line 681 of file dolby_e.c.

Referenced by bit_allocate(), and calc_lowcomp().

calc_lowcomp()

static void calc_lowcomp ( int *  msk_val )

static

Definition at line 687 of file dolby_e.c.

Referenced by bit_allocate().

bit_allocate()

static void bit_allocate ( int  nb_exponent, int  nb_code, int  fr_code, int *  exp, int *  bap, int  fg_spc, int  fg_ofs, int  msk_mod, int  snr_ofs  )

static

Definition at line 720 of file dolby_e.c.

Referenced by parse_bit_alloc().

parse_bit_alloc()

static int parse_bit_alloc ( DBEDecodeContext *  s1, DBEChannel *  c  )

static

Definition at line 769 of file dolby_e.c.

Referenced by parse_channel().

parse_indices()

static int parse_indices ( DBEContext *  s, DBEChannel *  c  )

static

Definition at line 816 of file dolby_e.c.

Referenced by parse_channel().

parse_mantissas()

static int parse_mantissas ( DBEContext *  s, DBEChannel *  c  )

static

Definition at line 847 of file dolby_e.c.

Referenced by parse_channel().

parse_channel()

static int parse_channel ( DBEDecodeContext *  s1, int  ch, int  seg_id  )

static

Definition at line 903 of file dolby_e.c.

Referenced by parse_audio().

parse_audio()

static int parse_audio ( DBEDecodeContext *  s1, int  start, int  end, int  seg_id  )

static

Definition at line 954 of file dolby_e.c.

Referenced by dolby_e_decode_frame().

parse_meter()

static int parse_meter ( DBEDecodeContext *  s1 )

static

Definition at line 982 of file dolby_e.c.

Referenced by dolby_e_decode_frame().

imdct_calc()

static void imdct_calc ( DBEDecodeContext *  s1, DBEGroup *  g, float *  result, float *  values  )

static

Definition at line 990 of file dolby_e.c.

Referenced by transform().

transform()

static void transform ( DBEDecodeContext *  s1, DBEChannel *  c, float *  history, float *  output  )

static

Definition at line 1016 of file dolby_e.c.

Referenced by filter_frame().

apply_gain()

static void apply_gain ( DBEDecodeContext *  s, int  begin, int  end, float *  output  )

static

Definition at line 1041 of file dolby_e.c.

Referenced by filter_frame().

filter_frame()

static int filter_frame ( DBEDecodeContext *  s, AVFrame *  frame  )

static

Definition at line 1058 of file dolby_e.c.

Referenced by dolby_e_decode_frame(), ff_filter_frame(), and ff_filter_frame_framed().

dolby_e_decode_frame()

static int dolby_e_decode_frame ( AVCodecContext *  avctx, AVFrame *  frame, int *  got_frame_ptr, AVPacket *  avpkt  )

static

Definition at line 1087 of file dolby_e.c.

dolby_e_flush()

static av_cold void dolby_e_flush ( AVCodecContext *  avctx )

static

Definition at line 1145 of file dolby_e.c.

dolby_e_close()

static av_cold int dolby_e_close ( AVCodecContext *  avctx )

static

Definition at line 1152 of file dolby_e.c.

init_tables()

static av_cold void init_tables ( void  )

static

Definition at line 1165 of file dolby_e.c.

Referenced by dolby_e_init().

dolby_e_init()

static av_cold int dolby_e_init ( AVCodecContext *  avctx )

static

Definition at line 1251 of file dolby_e.c.

Variable Documentation

lfe_channel_tab

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 92 of file dolby_e.c.

Referenced by parse_channel().

ch_reorder_4

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

static

Definition at line 97 of file dolby_e.c.

Referenced by filter_frame().

ch_reorder_6

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

static

Definition at line 98 of file dolby_e.c.

Referenced by filter_frame().

ch_reorder_8

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

static

Definition at line 99 of file dolby_e.c.

Referenced by filter_frame().

ch_reorder_n

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

static

Definition at line 100 of file dolby_e.c.

Referenced by filter_frame().

nb_groups_tab

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

static

Definition at line 103 of file dolby_e.c.

Referenced by parse_channel().

nb_mstr_exp_tab

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

static

Definition at line 105 of file dolby_e.c.

Referenced by parse_channel().

nb_mantissa_38

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 107 of file dolby_e.c.

nb_mantissa_44

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 113 of file dolby_e.c.

nb_mantissa_50

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 119 of file dolby_e.c.

imdct_bits_tab

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

static

Definition at line 126 of file dolby_e.c.

Referenced by dolby_e_init(), and imdct_calc().

grp_tab_0

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 128 of file dolby_e.c.

grp_tab_1

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 132 of file dolby_e.c.

grp_tab_2

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 143 of file dolby_e.c.

grp_tab_3

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 153 of file dolby_e.c.

grp_tab_4

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 157 of file dolby_e.c.

grp_tab_5

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 161 of file dolby_e.c.

grp_tab_6

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 172 of file dolby_e.c.

grp_tab_7

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 182 of file dolby_e.c.

frm_ofs_tab

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 186 of file dolby_e.c.

Referenced by parse_channel().

mantissa_size1

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 191 of file dolby_e.c.

Referenced by parse_mantissas().

mantissa_size2

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 198 of file dolby_e.c.

Referenced by parse_mantissas().

start_window

const float start_window[192]

static

Definition at line 205 of file dolby_e.c.

Referenced by init_tables().

short_window2

const float short_window2[192]

static

Definition at line 258 of file dolby_e.c.

Referenced by init_tables().

short_window3

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 311 of file dolby_e.c.

Referenced by init_tables().

dc_code_tab

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

static

Definition at line 330 of file dolby_e.c.

Referenced by bit_allocate().

ht_code_tab

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

static

Definition at line 332 of file dolby_e.c.

Referenced by bit_allocate().

band_ofs_tab

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 334 of file dolby_e.c.

Referenced by bit_allocate().

band_low_tab

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

static

Definition at line 338 of file dolby_e.c.

Referenced by bit_allocate().

fast_gain_tab

const uint16_t fast_gain_tab[8]

static

Initial value:

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

Definition at line 340 of file dolby_e.c.

Referenced by bit_allocate().

slow_decay_tab

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

static

Definition at line 344 of file dolby_e.c.

Referenced by bit_allocate().

misc_decay_tab

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 346 of file dolby_e.c.

Referenced by bit_allocate().

fast_decay_tab

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

static

Definition at line 352 of file dolby_e.c.

Referenced by bit_allocate().

fast_gain_adj_tab

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

static

Definition at line 424 of file dolby_e.c.

Referenced by bit_allocate().

slow_gain_tab

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

static

Definition at line 470 of file dolby_e.c.

Referenced by bit_allocate().

hearing_thresh_tab

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

static

Definition at line 508 of file dolby_e.c.

Referenced by bit_allocate().

lwc_gain_tab

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 563 of file dolby_e.c.

Referenced by calc_lowcomp().

lwc_adj_tab

const int16_t lwc_adj_tab[7]

static

Initial value:

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

Definition at line 577 of file dolby_e.c.

Referenced by calc_lowcomp().

log_add_tab

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 581 of file dolby_e.c.

Referenced by log_add().

bap_tab

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 598 of file dolby_e.c.

Referenced by ac3_bit_alloc_calc_bap_c(), bit_allocate(), and decode_audio_block().

mantissa_tab1

float mantissa_tab1[17][4]

static

Definition at line 605 of file dolby_e.c.

Referenced by init_tables(), and parse_mantissas().

mantissa_tab2

float mantissa_tab2[17][4]

static

Definition at line 606 of file dolby_e.c.

Referenced by init_tables(), and parse_mantissas().

mantissa_tab3

float mantissa_tab3[17][4]

static

Definition at line 607 of file dolby_e.c.

Referenced by init_tables(), and parse_mantissas().

exponent_tab

float exponent_tab[50]

static

Definition at line 608 of file dolby_e.c.

Referenced by init_tables(), and parse_mantissas().

gain_tab

float gain_tab[1024]

static

Definition at line 609 of file dolby_e.c.

Referenced by apply_gain(), and init_tables().

window

float window[3712]

static

Definition at line 611 of file dolby_e.c.

Referenced by init_tables(), and transform().

options

const AVOption options[]

static

Initial value:

= {
    { "channel_order", "Order in which the channels are to be exported",
        OFFSET(dectx.metadata.output_channel_order), AV_OPT_TYPE_INT,
        { .i64 = CHANNEL_ORDER_DEFAULT }, 0, 1, FLAGS, "channel_order" },
      { "default", "normal libavcodec channel order", 0, AV_OPT_TYPE_CONST,
        { .i64 = CHANNEL_ORDER_DEFAULT }, .flags = FLAGS, "channel_order" },
      { "coded",    "order in which the channels are coded in the bitstream",
        0, AV_OPT_TYPE_CONST, { .i64 = CHANNEL_ORDER_CODED }, .flags = FLAGS, "channel_order" },
 
      { NULL },
}

Definition at line 1281 of file dolby_e.c.

dolby_e_decoder_class

const AVClass dolby_e_decoder_class

static

Initial value:

= {
    .class_name = "Dolby E decoder",
    .item_name  = av_default_item_name,
    .option     = options,
    .version    = LIBAVUTIL_VERSION_INT,
}

Definition at line 1293 of file dolby_e.c.

ff_dolby_e_decoder

const FFCodec ff_dolby_e_decoder

Initial value:

= {
    .p.name         = "dolby_e",
    .p.long_name    = NULL_IF_CONFIG_SMALL("Dolby E"),
    .p.type         = AVMEDIA_TYPE_AUDIO,
    .p.id           = AV_CODEC_ID_DOLBY_E,
    .priv_data_size = sizeof(DBEDecodeContext),
    .p.priv_class   = &dolby_e_decoder_class,
    .init           = dolby_e_init,
    FF_CODEC_DECODE_CB(dolby_e_decode_frame),
    .close          = dolby_e_close,
    .flush          = dolby_e_flush,
    .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_CHANNEL_CONF,
    .p.sample_fmts  = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP, AV_SAMPLE_FMT_NONE },
    .caps_internal  = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
}

Definition at line 1300 of file dolby_e.c.