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

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

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, void data, 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]

AVCodec	ff_dolby_e_decoder

Macro Definition Documentation

◆ MAX_SEGMENTS

#define MAX_SEGMENTS 2

Definition at line 32 of file dolby_e.c.

◆ MAX_GROUPS

#define MAX_GROUPS 8

Definition at line 34 of file dolby_e.c.

◆ MAX_EXPONENTS

#define MAX_EXPONENTS 304

Definition at line 35 of file dolby_e.c.

◆ MAX_MANTISSAS

#define MAX_MANTISSAS 1024

Definition at line 36 of file dolby_e.c.

◆ MAX_MSTR_EXP

#define MAX_MSTR_EXP 2

Definition at line 38 of file dolby_e.c.

◆ MAX_BIAS_EXP

#define MAX_BIAS_EXP 50

Definition at line 39 of file dolby_e.c.

Function Documentation

◆ skip_input()

static int skip_input	(	DBEContext *	s,
		int	nb_words
	)

static

Definition at line 604 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 616 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 628 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 636 of file dolby_e.c.

Referenced by parse_exponents().

◆ parse_exponents()

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

static

Definition at line 653 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 672 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 678 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 711 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 760 of file dolby_e.c.

Referenced by parse_channel().

◆ parse_indices()

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

static

Definition at line 807 of file dolby_e.c.

Referenced by parse_channel().

◆ parse_mantissas()

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

static

Definition at line 838 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 894 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 945 of file dolby_e.c.

Referenced by dolby_e_decode_frame().

◆ parse_meter()

static int parse_meter ( DBEDecodeContext * s1 )

static

Definition at line 973 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 981 of file dolby_e.c.

Referenced by transform().

◆ transform()

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

static

Definition at line 1007 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 1032 of file dolby_e.c.

Referenced by filter_frame().

◆ filter_frame()

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

static

Definition at line 1049 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,
		void *	data,
		int *	got_frame_ptr,
		AVPacket *	avpkt
	)

static

Definition at line 1078 of file dolby_e.c.

◆ dolby_e_flush()

static av_cold void dolby_e_flush ( AVCodecContext * avctx )

static

Definition at line 1132 of file dolby_e.c.

◆ dolby_e_close()

static av_cold int dolby_e_close ( AVCodecContext * avctx )

static

Definition at line 1139 of file dolby_e.c.

◆ init_tables()

static av_cold void init_tables ( void )

static

Definition at line 1152 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 1238 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 83 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 88 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 89 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 90 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 91 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 94 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 96 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 98 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 104 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 110 of file dolby_e.c.

◆ imdct_bits_tab

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

static

Definition at line 117 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 119 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 123 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 134 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 144 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 148 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 152 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 163 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 173 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 177 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 182 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 189 of file dolby_e.c.

Referenced by parse_mantissas().

◆ start_window

const float start_window[192]

static

Definition at line 196 of file dolby_e.c.

Referenced by init_tables().

◆ short_window2

const float short_window2[192]

static

Definition at line 249 of file dolby_e.c.

Referenced by init_tables().

◆ short_window3

const float short_window3[64]

static

Initial value:

= {
00326887936450, 0.00550242900936, 0.00786846643791, 0.01045683453520,
01330402120132, 0.01643221072863, 0.01985798040609, 0.02359509464766,
02765559221954, 0.03205025893128, 0.03678884369614, 0.04188015679495,
04733210987781, 0.05315172583924, 0.05934513287609, 0.06591755045290,
07287327156378, 0.08021564389822, 0.08794705152307, 0.09606889811179,
10458159240070, 0.11348453632940, 0.12277611617809, 0.13245369691511,
14251361989876, 0.15295120402567, 0.16376075037904, 0.17493555039885,
18646789757072, 0.19834910260891, 0.21056951208995, 0.22311853047787,
23598464546683, 0.24915545655419, 0.26261770674500, 0.27635731727778,
29035942525136, 0.30460842402318, 0.31908800624032, 0.33378120935681,
34867046348260, 0.36373764140285, 0.37896411059909, 0.39433078709788,
40981819096657, 0.42540650327031, 0.44107562429959, 0.45680523287270,
47257484651351, 0.48836388230077, 0.50415171818214, 0.51991775454258,
53564147581496, 0.55130251191887, 0.56688069931047, 0.58235614142007,
59770926827271, 0.61292089506118, 0.62797227945823, 0.64284517745255,
65752189749349, 0.67198535273209, 0.68621911114984, 0.70020744337099,
}

Definition at line 302 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 321 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 323 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 325 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 329 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 331 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 335 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 337 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 343 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 415 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 461 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 499 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 554 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 568 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 572 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 589 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 596 of file dolby_e.c.

Referenced by init_tables(), and parse_mantissas().

◆ mantissa_tab2

float mantissa_tab2[17][4]

static

Definition at line 597 of file dolby_e.c.

Referenced by init_tables(), and parse_mantissas().

◆ mantissa_tab3

float mantissa_tab3[17][4]

static

Definition at line 598 of file dolby_e.c.

Referenced by init_tables(), and parse_mantissas().

◆ exponent_tab

float exponent_tab[50]

static

Definition at line 599 of file dolby_e.c.

Referenced by init_tables(), and parse_mantissas().

◆ gain_tab

float gain_tab[1024]

static

Definition at line 600 of file dolby_e.c.

Referenced by apply_gain(), and init_tables().

◆ window

float window[3712]

static

Definition at line 602 of file dolby_e.c.

Referenced by init_tables(), and transform().

◆ ff_dolby_e_decoder

AVCodec ff_dolby_e_decoder

Initial value:

= {
    .name           = "dolby_e",
    .long_name      = NULL_IF_CONFIG_SMALL("Dolby E"),
    .type           = AVMEDIA_TYPE_AUDIO,
    .id             = AV_CODEC_ID_DOLBY_E,
    .priv_data_size = sizeof(DBEDecodeContext),
    .init           = dolby_e_init,
    .decode         = dolby_e_decode_frame,
    .close          = dolby_e_close,
    .flush          = dolby_e_flush,
    .capabilities   = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_CHANNEL_CONF,
    .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 1259 of file dolby_e.c.

Data Structures

Macros

Functions

Variables

Macro Definition Documentation

◆ MAX_SEGMENTS

◆ MAX_GROUPS

◆ MAX_EXPONENTS

◆ MAX_MANTISSAS

◆ MAX_MSTR_EXP

◆ MAX_BIAS_EXP

Function Documentation

◆ skip_input()

◆ parse_key()

◆ parse_metadata_ext()

◆ unbias_exponents()

◆ parse_exponents()

◆ log_add()

◆ calc_lowcomp()

◆ bit_allocate()

◆ parse_bit_alloc()

◆ parse_indices()

◆ parse_mantissas()

◆ parse_channel()

◆ parse_audio()

◆ parse_meter()

◆ imdct_calc()

◆ transform()

◆ apply_gain()

◆ filter_frame()

◆ dolby_e_decode_frame()

◆ dolby_e_flush()

◆ dolby_e_close()

◆ init_tables()

◆ dolby_e_init()

Variable Documentation

◆ lfe_channel_tab

◆ ch_reorder_4

◆ ch_reorder_6

◆ ch_reorder_8

◆ ch_reorder_n

◆ nb_groups_tab

◆ nb_mstr_exp_tab

◆ nb_mantissa_38

◆ nb_mantissa_44

◆ nb_mantissa_50

◆ imdct_bits_tab

◆ grp_tab_0

◆ grp_tab_1

◆ grp_tab_2

◆ grp_tab_3

◆ grp_tab_4

◆ grp_tab_5

◆ grp_tab_6

◆ grp_tab_7

◆ frm_ofs_tab

◆ mantissa_size1

◆ mantissa_size2

◆ start_window

◆ short_window2

◆ short_window3

◆ dc_code_tab

◆ ht_code_tab

◆ band_ofs_tab

◆ band_low_tab

◆ fast_gain_tab

◆ slow_decay_tab

◆ misc_decay_tab

◆ fast_decay_tab

◆ fast_gain_adj_tab

◆ slow_gain_tab

◆ hearing_thresh_tab

◆ lwc_gain_tab

◆ lwc_adj_tab

◆ log_add_tab

◆ bap_tab

◆ mantissa_tab1

◆ mantissa_tab2

◆ mantissa_tab3

◆ exponent_tab