ac3enc_float.c File Reference

#include "audiodsp.h"
#include "ac3enc.h"
#include "codec_internal.h"
#include "eac3enc.h"
#include "kbdwin.h"
#include "ac3enc_template.c"

Go to the source code of this file.

Macros
#define	AC3ENC_FLOAT   1

Functions
static void	scale_coefficients (AC3EncodeContext *s)
static void	clip_coefficients (AudioDSPContext *adsp, float *coef, unsigned int len)
static CoefType	calc_cpl_coord (CoefSumType energy_ch, CoefSumType energy_cpl)
static void	sum_square_butterfly (AC3EncodeContext *s, float sum[4], const float *coef0, const float *coef1, int len)
static av_cold int	ac3_float_mdct_init (AC3EncodeContext *s)
	Initialize MDCT tables. More...
av_cold int	ff_ac3_float_encode_init (AVCodecContext *avctx)

Variables
const FFCodec	ff_ac3_encoder

Detailed Description

floating-point AC-3 encoder.

Definition in file ac3enc_float.c.

Macro Definition Documentation

AC3ENC_FLOAT

#define AC3ENC_FLOAT   1

Definition at line 29 of file ac3enc_float.c.

Function Documentation

scale_coefficients()

static void scale_coefficients ( AC3EncodeContext *  s )

static

Definition at line 40 of file ac3enc_float.c.

Referenced by encode_frame().

clip_coefficients()

static void clip_coefficients ( AudioDSPContext *  adsp, float *  coef, unsigned int  len  )

static

Definition at line 53 of file ac3enc_float.c.

calc_cpl_coord()

static CoefType calc_cpl_coord ( CoefSumType  energy_ch, CoefSumType  energy_cpl  )

static

Definition at line 63 of file ac3enc_float.c.

sum_square_butterfly()

static void sum_square_butterfly ( AC3EncodeContext *  s, float  sum[4], const float *  coef0, const float *  coef1, int  len  )

static

Definition at line 71 of file ac3enc_float.c.

ac3_float_mdct_init()

static av_cold int ac3_float_mdct_init ( AC3EncodeContext *  s )

static

Initialize MDCT tables.

Parameters

s	AC-3 encoder private context

Returns

0 on success, negative error code on failure

Definition at line 86 of file ac3enc_float.c.

Referenced by ff_ac3_float_encode_init().

ff_ac3_float_encode_init()

av_cold int ff_ac3_float_encode_init

(

AVCodecContext *

avctx

)

Definition at line 103 of file ac3enc_float.c.

Variable Documentation

ff_ac3_encoder

const FFCodec ff_ac3_encoder

Initial value:

= {
    .p.name          = "ac3",
    CODEC_LONG_NAME("ATSC A/52A (AC-3)"),
    .p.type          = AVMEDIA_TYPE_AUDIO,
    .p.id            = AV_CODEC_ID_AC3,
    .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    = &ff_ac3enc_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 114 of file ac3enc_float.c.