ac3enc_float.c File Reference

floating-point AC-3 encoder. More...

#include "internal.h"
#include "audiodsp.h"
#include "ac3enc.h"
#include "eac3enc.h"
#include "kbdwin.h"
#include "ac3enc_opts_template.c"
#include "ac3enc_template.c"

Go to the source code of this file.

Macros
#define	CONFIG_AC3ENC_FLOAT   1
#define	AC3ENC_TYPE   AC3ENC_TYPE_AC3

Functions
av_cold void	ff_ac3_float_mdct_end (AC3EncodeContext *s)
	Finalize MDCT and free allocated memory.
av_cold int	ff_ac3_float_mdct_init (AC3EncodeContext *s)
	Initialize MDCT tables.
static int	normalize_samples (AC3EncodeContext *s)
static void	scale_coefficients (AC3EncodeContext *s)
static void	sum_square_butterfly (AC3EncodeContext *s, float sum[4], const float *coef0, const float *coef1, int len)
static void	clip_coefficients (AudioDSPContext *adsp, float *coef, unsigned int len)
static CoefType	calc_cpl_coord (CoefSumType energy_ch, CoefSumType energy_cpl)
av_cold int	ff_ac3_float_encode_init (AVCodecContext *avctx)

Variables
static const AVClass	ac3enc_class
AVCodec	ff_ac3_encoder

Detailed Description

floating-point AC-3 encoder.

Definition in file ac3enc_float.c.

Macro Definition Documentation

#define CONFIG_AC3ENC_FLOAT   1

Definition at line 29 of file ac3enc_float.c.

#define AC3ENC_TYPE   AC3ENC_TYPE_AC3

Definition at line 37 of file ac3enc_float.c.

Function Documentation

av_cold void ff_ac3_float_mdct_end

(

AC3EncodeContext *

s

)

Finalize MDCT and free allocated memory.

Parameters

s	AC-3 encoder private context

Definition at line 54 of file ac3enc_float.c.

Referenced by ff_ac3_encode_init().

av_cold int ff_ac3_float_mdct_init

(

AC3EncodeContext *

s

)

Initialize MDCT tables.

Parameters

s	AC-3 encoder private context

Returns

0 on success, negative error code on failure

Definition at line 67 of file ac3enc_float.c.

Referenced by ff_ac3_encode_init().

static int normalize_samples ( AC3EncodeContext *  s )

static

Definition at line 93 of file ac3enc_float.c.

static void scale_coefficients ( AC3EncodeContext *  s )

static

Definition at line 102 of file ac3enc_float.c.

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

static

Definition at line 111 of file ac3enc_float.c.

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

static

Definition at line 121 of file ac3enc_float.c.

static CoefType calc_cpl_coord ( CoefSumType  energy_ch, CoefSumType  energy_cpl  )

static

Definition at line 131 of file ac3enc_float.c.

av_cold int ff_ac3_float_encode_init

(

AVCodecContext *

avctx

)

Definition at line 139 of file ac3enc_float.c.

Variable Documentation

const AVClass ac3enc_class

static

Initial value:

= {
    .class_name = "AC-3 Encoder",
    .item_name  = av_default_item_name,
    .option     = ac3_options,
    .version    = LIBAVUTIL_VERSION_INT,
}

Definition at line 39 of file ac3enc_float.c.

AVCodec ff_ac3_encoder

Initial value:

= {
    .name            = "ac3",
    .long_name       = NULL_IF_CONFIG_SMALL("ATSC A/52A (AC-3)"),
    .type            = AVMEDIA_TYPE_AUDIO,
    .id              = AV_CODEC_ID_AC3,
    .priv_data_size  = sizeof(AC3EncodeContext),
    .init            = ff_ac3_float_encode_init,
    .encode2         = ff_ac3_float_encode_frame,
    .close           = ff_ac3_encode_close,
    .sample_fmts     = (const enum AVSampleFormat[]){ AV_SAMPLE_FMT_FLTP,
                                                      AV_SAMPLE_FMT_NONE },
    .priv_class      = &ac3enc_class,
    .channel_layouts = ff_ac3_channel_layouts,
    .defaults        = ac3_defaults,
}

Definition at line 148 of file ac3enc_float.c.