libavcodec/eac3dec_data.c File Reference

Tables taken directly from the E-AC-3 spec. More...

#include "eac3dec_data.h"
#include "ac3.h"

Go to the source code of this file.

Variables
const uint8_t	ff_eac3_bits_vs_hebap [20]
const int16_t	ff_eac3_gaq_remap_1 [12]
	Table E3.6, Gk=1 No gain (Gk=1) inverse quantization, remapping scale factors ff_eac3_gaq_remap[hebap+8].
const int16_t	ff_eac3_gaq_remap_2_4_a [9][2]
	Table E3.6, Gk=2 & Gk=4, A Large mantissa inverse quantization, remapping scale factors ff_eac3_gaq_remap_2_4_a[hebap-8][Gk=2,4].
const int16_t	ff_eac3_gaq_remap_2_4_b [9][2]
	Table E3.6, Gk=2 & Gk=4, B Large mantissa inverse quantization, negative mantissa remapping offsets ff_eac3_gaq_remap_3_4_b[hebap-8][Gk=2,4].
static const int16_t	vq_hebap1 [4][6]
static const int16_t	vq_hebap2 [8][6]
static const int16_t	vq_hebap3 [16][6]
static const int16_t	vq_hebap4 [32][6]
static const int16_t	vq_hebap5 [128][6]
static const int16_t	vq_hebap6 [256][6]
static const int16_t	vq_hebap7 [512][6]
const int16_t(*const [8]	ff_eac3_mantissa_vq )[6]
const uint8_t	ff_eac3_frm_expstr [32][6]
	Table E2.14 Frame Exponent Strategy Combinations.
const float	ff_eac3_spx_atten_tab [32][3]
	Table E.25: Spectral Extension Attenuation Table ff_eac3_spx_atten_tab[code][bin]=pow(2.0,(bin+1)*(code+1)/-15.0);.

---

Detailed Description

Tables taken directly from the E-AC-3 spec.

Definition in file eac3dec_data.c.

---

Variable Documentation

const uint8_t ff_eac3_bits_vs_hebap[20]

Initial value:

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

Definition at line 30 of file eac3dec_data.c.

Referenced by ff_eac3_decode_transform_coeffs_aht_ch().

const uint8_t ff_eac3_frm_expstr[32][6]

Table E2.14 Frame Exponent Strategy Combinations.

Definition at line 1062 of file eac3dec_data.c.

Referenced by ff_eac3_parse_header().

const int16_t ff_eac3_gaq_remap_1[12]

Initial value:

 {
    4681, 2185, 1057, 520, 258, 129, 64, 32, 16, 8, 2, 0
}

Table E3.6, Gk=1 No gain (Gk=1) inverse quantization, remapping scale factors ff_eac3_gaq_remap[hebap+8].

Definition at line 40 of file eac3dec_data.c.

Referenced by ff_eac3_decode_transform_coeffs_aht_ch().

const int16_t ff_eac3_gaq_remap_2_4_a[9][2]

Initial value:

 {
    { -10923, -4681 },
    { -14043, -6554 },
    { -15292, -7399 },
    { -15855, -7802 },
    { -16124, -7998 },
    { -16255, -8096 },
    { -16320, -8144 },
    { -16352, -8168 },
    { -16368, -8180 }
}

Table E3.6, Gk=2 & Gk=4, A Large mantissa inverse quantization, remapping scale factors ff_eac3_gaq_remap_2_4_a[hebap-8][Gk=2,4].

Definition at line 49 of file eac3dec_data.c.

Referenced by ff_eac3_decode_transform_coeffs_aht_ch().

const int16_t ff_eac3_gaq_remap_2_4_b[9][2]

Initial value:

 {
    {  -5461, -1170 },
    { -11703, -4915 },
    { -14199, -6606 },
    { -15327, -7412 },
    { -15864, -7805 },
    { -16126, -7999 },
    { -16255, -8096 },
    { -16320, -8144 },
    { -16352, -8168 }
}

Table E3.6, Gk=2 & Gk=4, B Large mantissa inverse quantization, negative mantissa remapping offsets ff_eac3_gaq_remap_3_4_b[hebap-8][Gk=2,4].

Definition at line 66 of file eac3dec_data.c.

Referenced by ff_eac3_decode_transform_coeffs_aht_ch().

const int16_t(* const[8] ff_eac3_mantissa_vq)[6]

Initial value:

 {
    NULL,
    vq_hebap1,
    vq_hebap2,
    vq_hebap3,
    vq_hebap4,
    vq_hebap5,
    vq_hebap6,
    vq_hebap7,
}

Definition at line 1048 of file eac3dec_data.c.

Referenced by ff_eac3_decode_transform_coeffs_aht_ch().

const float ff_eac3_spx_atten_tab[32][3]

Table E.25: Spectral Extension Attenuation Table ff_eac3_spx_atten_tab[code][bin]=pow(2.0,(bin+1)*(code+1)/-15.0);.

Definition at line 1101 of file eac3dec_data.c.

Referenced by ff_eac3_apply_spectral_extension().

const int16_t vq_hebap1[4][6] [static]

Initial value:

 {
{   7167,    4739,    1106,    4269,   10412,    4820},
{  -5702,   -3187,  -14483,   -1392,   -2027,     849},
{    633,    6199,    7009,  -12779,   -2306,   -2636},
{  -1468,   -7031,    7592,   10617,   -5946,   -3062},
}

Definition at line 78 of file eac3dec_data.c.

const int16_t vq_hebap2[8][6] [static]

Initial value:

 {
{ -12073,     608,   -7019,     590,    4000,     869},
{   6692,   15689,   -6178,   -9239,     -74,     133},
{   1855,    -989,   20596,   -2920,   -4475,     225},
{  -1194,   -3901,    -821,   -6566,    -875,  -20298},
{  -2762,   -3181,   -4094,   -5623,  -16945,    9765},
{   1547,    6839,    1980,   20233,   -1071,   -4986},
{   6221,  -17915,   -5516,    6266,     358,    1162},
{   3753,   -1066,    4283,   -3227,   15928,   10186},
}

Definition at line 84 of file eac3dec_data.c.

const int16_t vq_hebap3[16][6] [static]

Initial value:

 {
{ -10028,   20779,   10982,   -4560,     798,     -68},
{  11050,   20490,   -6617,   -5342,   -1797,   -1631},
{   3977,    -542,    7118,   -1166,   18844,   14678},
{  -4320,     -96,   -7295,    -492,  -22050,   -4277},
{   2692,    5856,    5530,   21862,   -7212,   -5325},
{   -135,  -23391,     962,    8115,    -644,     382},
{  -1563,    3400,   -3299,    4693,   -6892,   22398},
{   3535,    3030,    7296,    6214,   20476,  -12099},
{     57,   -6823,    1848,  -22349,   -5919,    6823},
{   -821,   -3655,    -387,   -6253,   -1735,  -22373},
{  -6046,    1586,  -18890,  -14392,    9214,     705},
{  -5716,     264,  -17964,   14618,    7921,    -337},
{   -110,     108,       8,      74,     -89,     -50},
{   6612,   -1517,   21687,   -1658,   -7949,    -246},
{  21667,   -6335,   -8290,    -101,   -1349,     -22},
{ -22003,   -6476,    7974,     648,    2054,    -331},
}

Definition at line 94 of file eac3dec_data.c.

const int16_t vq_hebap4[32][6] [static]

Definition at line 112 of file eac3dec_data.c.

const int16_t vq_hebap5[128][6] [static]

Definition at line 145 of file eac3dec_data.c.

const int16_t vq_hebap6[256][6] [static]

Definition at line 275 of file eac3dec_data.c.

const int16_t vq_hebap7[512][6] [static]

Definition at line 533 of file eac3dec_data.c.