aacdec_common.c File Reference

#include "aac.h"
#include "aacdectab.h"
#include "aacps.h"
#include "aactab.h"
#include "vlc.h"
#include "libavutil/attributes.h"
#include "libavutil/thread.h"

Go to the source code of this file.

Macros
#define	TAB_WRAP_SIZE(name)   name[i], sizeof(name[i][0]), sizeof(name[i][0])

Functions
static av_cold void	aacdec_common_init (void)
av_cold void	ff_aacdec_common_init_once (void)

Variables
const int8_t	ff_tags_per_config [16] = { 0, 1, 1, 2, 3, 3, 4, 5, 0, 0, 0, 5, 5, 16, 5, 0 }
const uint8_t	ff_aac_channel_layout_map [16][16][3]
const int16_t	ff_aac_channel_map [3][4][6]
const AVChannelLayout	ff_aac_ch_layout []
VLCElem	ff_vlc_scalefactors [352]
const VLCElem *	ff_vlc_spectral [11]
static const uint8_t	sbr_huffman_tab [][2]
	Huffman tables for SBR. More...
static const uint8_t	sbr_huffman_nb_codes []
static const int8_t	sbr_vlc_offsets [10]
const VLCElem *	ff_aac_sbr_vlc [10]

Detailed Description

Common code and tables of the AAC fixed- and floating-point decoders

Definition in file aacdec_common.c.

Macro Definition Documentation

TAB_WRAP_SIZE

#define TAB_WRAP_SIZE

(

name

)

name[i], sizeof(name[i][0]), sizeof(name[i][0])

Function Documentation

aacdec_common_init()

static av_cold void aacdec_common_init ( void  )

static

Definition at line 262 of file aacdec_common.c.

Referenced by ff_aacdec_common_init_once().

ff_aacdec_common_init_once()

av_cold void ff_aacdec_common_init_once

(

void

)

Definition at line 303 of file aacdec_common.c.

Referenced by aac_static_table_init().

Variable Documentation

ff_tags_per_config

const int8_t ff_tags_per_config[16] = { 0, 1, 1, 2, 3, 3, 4, 5, 0, 0, 0, 5, 5, 16, 5, 0 }

Definition at line 37 of file aacdec_common.c.

Referenced by aac_decode_er_frame(), get_che(), and set_default_channel_config().

ff_aac_channel_layout_map

const uint8_t ff_aac_channel_layout_map[16][16][3]

Definition at line 39 of file aacdec_common.c.

Referenced by aac_decode_er_frame(), and set_default_channel_config().

ff_aac_channel_map

const int16_t ff_aac_channel_map[3][4][6]

Initial value:

= {
    {
      { AV_CHAN_FRONT_CENTER,        AV_CHAN_FRONT_LEFT_OF_CENTER, AV_CHAN_FRONT_RIGHT_OF_CENTER, AV_CHAN_FRONT_LEFT,        AV_CHAN_FRONT_RIGHT,        AV_CHAN_NONE },
      { AV_CHAN_UNUSED,              AV_CHAN_NONE,                 AV_CHAN_NONE,                  AV_CHAN_NONE,              AV_CHAN_NONE,               AV_CHAN_NONE },
      { AV_CHAN_UNUSED,              AV_CHAN_SIDE_LEFT,            AV_CHAN_SIDE_RIGHT,            AV_CHAN_BACK_LEFT,         AV_CHAN_BACK_RIGHT,         AV_CHAN_BACK_CENTER },
      { AV_CHAN_LOW_FREQUENCY,       AV_CHAN_LOW_FREQUENCY_2,      AV_CHAN_NONE,                  AV_CHAN_NONE,              AV_CHAN_NONE,               AV_CHAN_NONE },
    },
    {
      { AV_CHAN_TOP_FRONT_CENTER,    AV_CHAN_NONE,                 AV_CHAN_NONE,                  AV_CHAN_TOP_FRONT_LEFT,    AV_CHAN_TOP_FRONT_RIGHT,    AV_CHAN_NONE },
      { AV_CHAN_UNUSED,              AV_CHAN_TOP_SIDE_LEFT,        AV_CHAN_TOP_SIDE_RIGHT,        AV_CHAN_NONE,              AV_CHAN_NONE,               AV_CHAN_TOP_CENTER},
      { AV_CHAN_UNUSED,              AV_CHAN_NONE,                 AV_CHAN_NONE,                  AV_CHAN_TOP_BACK_LEFT,     AV_CHAN_TOP_BACK_RIGHT,     AV_CHAN_TOP_BACK_CENTER},
      { AV_CHAN_NONE,                AV_CHAN_NONE,                 AV_CHAN_NONE,                  AV_CHAN_NONE,              AV_CHAN_NONE,               AV_CHAN_NONE},
    },
    {
      { AV_CHAN_BOTTOM_FRONT_CENTER, AV_CHAN_NONE,                 AV_CHAN_NONE,                  AV_CHAN_BOTTOM_FRONT_LEFT, AV_CHAN_BOTTOM_FRONT_RIGHT, AV_CHAN_NONE },
      { AV_CHAN_NONE,                AV_CHAN_NONE,                 AV_CHAN_NONE,                  AV_CHAN_NONE,              AV_CHAN_NONE,               AV_CHAN_NONE },
      { AV_CHAN_NONE,                AV_CHAN_NONE,                 AV_CHAN_NONE,                  AV_CHAN_NONE,              AV_CHAN_NONE,               AV_CHAN_NONE },
      { AV_CHAN_NONE,                AV_CHAN_NONE,                 AV_CHAN_NONE,                  AV_CHAN_NONE,              AV_CHAN_NONE,               AV_CHAN_NONE },
    },
}

Definition at line 74 of file aacdec_common.c.

Referenced by assign_channels().

ff_aac_ch_layout

const AVChannelLayout ff_aac_ch_layout[]

Initial value:

= {
    AV_CHANNEL_LAYOUT_MONO,
    AV_CHANNEL_LAYOUT_STEREO,
    AV_CHANNEL_LAYOUT_SURROUND,
    AV_CHANNEL_LAYOUT_4POINT0,
    AV_CHANNEL_LAYOUT_5POINT0_BACK,
    AV_CHANNEL_LAYOUT_5POINT1_BACK,
    AV_CHANNEL_LAYOUT_7POINT1_WIDE_BACK,
    AV_CHANNEL_LAYOUT_6POINT1_BACK,
    AV_CHANNEL_LAYOUT_7POINT1,
    AV_CHANNEL_LAYOUT_22POINT2,
    AV_CHANNEL_LAYOUT_7POINT1_TOP_BACK,
    { 0 },
}

Definition at line 95 of file aacdec_common.c.

ff_vlc_scalefactors

VLCElem ff_vlc_scalefactors[352]

Definition at line 110 of file aacdec_common.c.

Referenced by aacdec_common_init(), decode_cce(), and decode_scalefactors().

ff_vlc_spectral

const VLCElem* ff_vlc_spectral[11]

Definition at line 111 of file aacdec_common.c.

Referenced by aacdec_common_init(), and decode_spectrum_and_dequant().

sbr_huffman_tab

const uint8_t sbr_huffman_tab[][2]

static

Huffman tables for SBR.

Definition at line 115 of file aacdec_common.c.

Referenced by aacdec_common_init().

sbr_huffman_nb_codes

const uint8_t sbr_huffman_nb_codes[]

static

Initial value:

= {
    121, 121, 49, 49, 63, 63, 25, 25, 63, 25
}

Definition at line 252 of file aacdec_common.c.

Referenced by aacdec_common_init().

sbr_vlc_offsets

const int8_t sbr_vlc_offsets[10]

static

Initial value:

= {
    -60, -60, -24, -24, -31, -31, -12, -12, -31, -12
}

Definition at line 256 of file aacdec_common.c.

Referenced by aacdec_common_init().

ff_aac_sbr_vlc

const VLCElem* ff_aac_sbr_vlc[10]

Definition at line 260 of file aacdec_common.c.

Referenced by aacdec_common_init(), read_sbr_envelope(), and read_sbr_noise().