libavcodec/ac3enc_float.c File Reference

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

#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.

Defines
#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 void	apply_window (DSPContext *dsp, float *output, const float *input, const float *window, unsigned int len)
static int	normalize_samples (AC3EncodeContext *s)
static void	scale_coefficients (AC3EncodeContext *s)
static void	clip_coefficients (DSPContext *dsp, float *coef, unsigned int len)
static CoefType	calc_cpl_coord (CoefSumType energy_ch, CoefSumType energy_cpl)
Variables
static const AVClass	ac3enc_class
AVCodec	ff_ac3_encoder

---

Detailed Description

floating-point AC-3 encoder.

Definition in file ac3enc_float.c.

---

Define Documentation

#define AC3ENC_TYPE   AC3ENC_TYPE_AC3

Definition at line 36 of file ac3enc_float.c.

#define CONFIG_AC3ENC_FLOAT   1

Definition at line 29 of file ac3enc_float.c.

---

Function Documentation

static void apply_window	(	DSPContext *	dsp,
		float *	output,
		const float *	input,
		const float *	window,
		unsigned int	len
	)			[static]

Definition at line 88 of file ac3enc_float.c.

static CoefType calc_cpl_coord	(	CoefSumType	energy_ch,
		CoefSumType	energy_cpl
	)			[static]

Definition at line 130 of file ac3enc_float.c.

static void clip_coefficients	(	DSPContext *	dsp,
		float *	coef,
		unsigned int	len
	)			[static]

Definition at line 121 of file ac3enc_float.c.

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 50 of file ac3enc_float.c.

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 63 of file ac3enc_float.c.

static int normalize_samples

(

AC3EncodeContext *

s

)

[static]

Definition at line 99 of file ac3enc_float.c.

static void scale_coefficients

(

AC3EncodeContext *

s

)

[static]

Definition at line 108 of file ac3enc_float.c.

---

Variable Documentation

const AVClass ac3enc_class [static]

Initial value:

 { "AC-3 Encoder", av_default_item_name,
                                      ac3_options, LIBAVUTIL_VERSION_INT }

Definition at line 38 of file ac3enc_float.c.

AVCodec ff_ac3_encoder

Initial value:

 {
    .name           = "ac3",
    .type           = AVMEDIA_TYPE_AUDIO,
    .id             = CODEC_ID_AC3,
    .priv_data_size = sizeof(AC3EncodeContext),
    .init           = ff_ac3_encode_init,
    .encode         = ff_ac3_float_encode_frame,
    .close          = ff_ac3_encode_close,
    .sample_fmts = (const enum AVSampleFormat[]){AV_SAMPLE_FMT_FLT,AV_SAMPLE_FMT_NONE},
    .long_name = NULL_IF_CONFIG_SMALL("ATSC A/52A (AC-3)"),
    .priv_class = &ac3enc_class,
    .channel_layouts = ff_ac3_channel_layouts,
}

Definition at line 140 of file ac3enc_float.c.