eac3_data.c File Reference

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

#include "eac3_data.h"
#include "ac3.h"

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]. More...
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]. More...
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]. More...
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.

Variable Documentation

ff_eac3_bits_vs_hebap

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,
}

ff_eac3_gaq_remap_1

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].

ff_eac3_gaq_remap_2_4_a

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].

ff_eac3_gaq_remap_2_4_b

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].

ff_eac3_mantissa_vq

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,
}