eac3enc.c File Reference

#include "libavutil/attributes.h"
#include "ac3enc.h"
#include "codec_internal.h"
#include "eac3enc.h"
#include "eac3_data.h"

Go to the source code of this file.

Macros
#define	AC3ENC_FLOAT   1

Functions
av_cold void	ff_eac3_exponent_init (void)
	Initialize E-AC-3 exponent tables. More...
void	ff_eac3_get_frame_exp_strategy (AC3EncodeContext *s)
	Determine frame exponent strategy use and indices. More...
void	ff_eac3_set_cpl_states (AC3EncodeContext *s)
	Set coupling states. More...
void	ff_eac3_output_frame_header (AC3EncodeContext *s)
	Write the E-AC-3 frame header to the output bitstream. More...

Variables
static const AVClass	eac3enc_class
static int8_t	eac3_frame_expstr_index_tab [3][4][4][4][4][4]
	LUT for finding a matching frame exponent strategy index from a set of exponent strategies for a single channel across all 6 blocks. More...
const FFCodec	ff_eac3_encoder

Detailed Description

E-AC-3 encoder

Definition in file eac3enc.c.

Macro Definition Documentation

AC3ENC_FLOAT

#define AC3ENC_FLOAT   1

Definition at line 27 of file eac3enc.c.

Function Documentation

ff_eac3_exponent_init()

av_cold void ff_eac3_exponent_init

(

void

)

Initialize E-AC-3 exponent tables.

Definition at line 50 of file eac3enc.c.

Referenced by ff_ac3_encode_init().

ff_eac3_get_frame_exp_strategy()

void ff_eac3_get_frame_exp_strategy

(

AC3EncodeContext *

s

)

Determine frame exponent strategy use and indices.

Definition at line 66 of file eac3enc.c.

Referenced by compute_exp_strategy().

ff_eac3_set_cpl_states()

void ff_eac3_set_cpl_states

(

AC3EncodeContext *

s

)

Set coupling states.

This determines whether certain flags must be written to the bitstream or whether they will be implicitly already known by the decoder.

Definition at line 93 of file eac3enc.c.

Referenced by apply_channel_coupling().

ff_eac3_output_frame_header()

void ff_eac3_output_frame_header

(

AC3EncodeContext *

s

)

Write the E-AC-3 frame header to the output bitstream.

Definition at line 126 of file eac3enc.c.

Referenced by ff_ac3_encode_init().

Variable Documentation

eac3enc_class

const AVClass eac3enc_class

static

Initial value:

= {
    .class_name = "E-AC-3 Encoder",
    .item_name  = av_default_item_name,
    .option     = &ff_ac3_enc_options[2], 
    .version    = LIBAVUTIL_VERSION_INT,
}

Definition at line 36 of file eac3enc.c.

eac3_frame_expstr_index_tab

int8_t eac3_frame_expstr_index_tab[3][4][4][4][4][4]

static

LUT for finding a matching frame exponent strategy index from a set of exponent strategies for a single channel across all 6 blocks.

Definition at line 47 of file eac3enc.c.

Referenced by ff_eac3_exponent_init(), and ff_eac3_get_frame_exp_strategy().

ff_eac3_encoder

const FFCodec ff_eac3_encoder

Initial value:

= {
    .p.name          = "eac3",
    CODEC_LONG_NAME("ATSC A/52 E-AC-3"),
    .p.type          = AVMEDIA_TYPE_AUDIO,
    .p.id            = AV_CODEC_ID_EAC3,
    .p.capabilities  = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE,
    .priv_data_size  = sizeof(AC3EncodeContext),
    .init            = ff_ac3_float_encode_init,
    FF_CODEC_ENCODE_CB(ff_ac3_float_encode_frame),
    .close           = ff_ac3_encode_close,
    .p.sample_fmts   = (const enum AVSampleFormat[]){ AV_SAMPLE_FMT_FLTP,
                                                      AV_SAMPLE_FMT_NONE },
    .p.priv_class    = &eac3enc_class,
    .p.supported_samplerates = ff_ac3_sample_rate_tab,
 
    .p.ch_layouts    = ff_ac3_ch_layouts,
    .defaults        = ff_ac3_enc_defaults,
    .caps_internal   = FF_CODEC_CAP_INIT_CLEANUP,
}

Definition at line 252 of file eac3enc.c.