ac3enc.h File Reference

#include <stdint.h>
#include "ac3.h"
#include "ac3dsp.h"
#include "avcodec.h"
#include "fft.h"
#include "mathops.h"
#include "me_cmp.h"
#include "put_bits.h"
#include "audiodsp.h"
#include "libavutil/fixed_dsp.h"

Go to the source code of this file.

Data Structures
struct	AC3EncOptions
	Encoding Options used by AVOption. More...
struct	AC3Block
	Data for a single audio block. More...
struct	AC3EncodeContext
	AC-3 encoder private context. More...

Macros
#define	AC3ENC_FLOAT   0
#define	AC3_NAME(x)   ff_ac3_fixed_ ## x
#define	MAC_COEF(d, a, b)   MAC64(d,a,b)
#define	COEF_MIN   -16777215
#define	COEF_MAX   16777215
#define	NEW_CPL_COORD_THRESHOLD   503317
#define	AC3ENC_OPT_NONE   -1
#define	AC3ENC_OPT_AUTO   -1
#define	AC3ENC_OPT_OFF   0
#define	AC3ENC_OPT_ON   1
#define	AC3ENC_OPT_NOT_INDICATED   0
#define	AC3ENC_OPT_MODE_ON   2
#define	AC3ENC_OPT_MODE_OFF   1
#define	AC3ENC_OPT_DSUREX_DPLIIZ   3
#define	AC3ENC_OPT_LARGE_ROOM   1
#define	AC3ENC_OPT_SMALL_ROOM   2
#define	AC3ENC_OPT_DOWNMIX_LTRT   1
#define	AC3ENC_OPT_DOWNMIX_LORO   2
#define	AC3ENC_OPT_DOWNMIX_DPLII   3
#define	AC3ENC_OPT_ADCONV_STANDARD   0
#define	AC3ENC_OPT_ADCONV_HDCD   1

Typedefs
typedef int32_t	SampleType
typedef int32_t	CoefType
typedef int64_t	CoefSumType

Functions
int	ff_ac3_encode_init (AVCodecContext *avctx)
int	ff_ac3_float_encode_init (AVCodecContext *avctx)
int	ff_ac3_encode_close (AVCodecContext *avctx)
	Finalize encoding and free any memory allocated by the encoder. More...
int	ff_ac3_validate_metadata (AC3EncodeContext *s)
	Validate metadata options as set by AVOption system. More...
void	ff_ac3_adjust_frame_size (AC3EncodeContext *s)
	Adjust the frame size to make the average bit rate match the target bit rate. More...
void	ff_ac3_compute_coupling_strategy (AC3EncodeContext *s)
	Set the initial coupling strategy parameters prior to coupling analysis. More...
int	ff_ac3_encode_frame_common_end (AVCodecContext *avctx, AVPacket *avpkt, const AVFrame *frame, int *got_packet_ptr)
int	ff_ac3_fixed_encode_frame (AVCodecContext *avctx, AVPacket *avpkt, const AVFrame *frame, int *got_packet_ptr)
int	ff_ac3_float_encode_frame (AVCodecContext *avctx, AVPacket *avpkt, const AVFrame *frame, int *got_packet_ptr)

Variables
const uint64_t	ff_ac3_channel_layouts [19]
	List of supported channel layouts. More...
const AVOption	ff_ac3_enc_options []
const AVCodecDefault	ff_ac3_enc_defaults []

Detailed Description

AC-3 encoder & E-AC-3 encoder common header

Definition in file ac3enc.h.

Macro Definition Documentation

AC3ENC_FLOAT

#define AC3ENC_FLOAT   0

Definition at line 43 of file ac3enc.h.

AC3_NAME

#define AC3_NAME

(

x

)

ff_ac3_fixed_ ## x

Definition at line 58 of file ac3enc.h.

MAC_COEF

#define MAC_COEF	(		d,
			a,
			b
	)		MAC64(d,a,b)

Definition at line 59 of file ac3enc.h.

COEF_MIN

#define COEF_MIN   -16777215

Definition at line 60 of file ac3enc.h.

COEF_MAX

#define COEF_MAX   16777215

Definition at line 61 of file ac3enc.h.

NEW_CPL_COORD_THRESHOLD

#define NEW_CPL_COORD_THRESHOLD   503317

Definition at line 62 of file ac3enc.h.

AC3ENC_OPT_NONE

#define AC3ENC_OPT_NONE   -1

Definition at line 69 of file ac3enc.h.

AC3ENC_OPT_AUTO

#define AC3ENC_OPT_AUTO   -1

Definition at line 70 of file ac3enc.h.

AC3ENC_OPT_OFF

#define AC3ENC_OPT_OFF   0

Definition at line 71 of file ac3enc.h.

AC3ENC_OPT_ON

#define AC3ENC_OPT_ON   1

Definition at line 72 of file ac3enc.h.

AC3ENC_OPT_NOT_INDICATED

#define AC3ENC_OPT_NOT_INDICATED   0

Definition at line 73 of file ac3enc.h.

AC3ENC_OPT_MODE_ON

#define AC3ENC_OPT_MODE_ON   2

Definition at line 74 of file ac3enc.h.

AC3ENC_OPT_MODE_OFF

#define AC3ENC_OPT_MODE_OFF   1

Definition at line 75 of file ac3enc.h.

AC3ENC_OPT_DSUREX_DPLIIZ

#define AC3ENC_OPT_DSUREX_DPLIIZ   3

Definition at line 76 of file ac3enc.h.

AC3ENC_OPT_LARGE_ROOM

#define AC3ENC_OPT_LARGE_ROOM   1

Definition at line 79 of file ac3enc.h.

AC3ENC_OPT_SMALL_ROOM

#define AC3ENC_OPT_SMALL_ROOM   2

Definition at line 80 of file ac3enc.h.

AC3ENC_OPT_DOWNMIX_LTRT

#define AC3ENC_OPT_DOWNMIX_LTRT   1

Definition at line 81 of file ac3enc.h.

AC3ENC_OPT_DOWNMIX_LORO

#define AC3ENC_OPT_DOWNMIX_LORO   2

Definition at line 82 of file ac3enc.h.

AC3ENC_OPT_DOWNMIX_DPLII

#define AC3ENC_OPT_DOWNMIX_DPLII   3

Definition at line 83 of file ac3enc.h.

AC3ENC_OPT_ADCONV_STANDARD

#define AC3ENC_OPT_ADCONV_STANDARD   0

Definition at line 84 of file ac3enc.h.

AC3ENC_OPT_ADCONV_HDCD

#define AC3ENC_OPT_ADCONV_HDCD   1

Definition at line 85 of file ac3enc.h.

Typedef Documentation

SampleType

typedef int32_t SampleType

Definition at line 63 of file ac3enc.h.

CoefType

typedef int32_t CoefType

Definition at line 64 of file ac3enc.h.

CoefSumType

typedef int64_t CoefSumType

Definition at line 65 of file ac3enc.h.

Function Documentation

ff_ac3_encode_init()

int ff_ac3_encode_init

(

AVCodecContext *

avctx

)

Definition at line 2506 of file ac3enc.c.

Referenced by ac3_fixed_encode_init(), and ff_ac3_float_encode_init().

ff_ac3_float_encode_init()

int ff_ac3_float_encode_init

(

AVCodecContext *

avctx

)

Definition at line 122 of file ac3enc_float.c.

ff_ac3_encode_close()

int ff_ac3_encode_close

(

AVCodecContext *

avctx

)

Finalize encoding and free any memory allocated by the encoder.

Parameters

avctx

Codec context

Definition at line 2113 of file ac3enc.c.

ff_ac3_validate_metadata()

int ff_ac3_validate_metadata

(

AC3EncodeContext *

s

)

Validate metadata options as set by AVOption system.

These values can optionally be changed per-frame.

Parameters

s	AC-3 encoder private context

Definition at line 1930 of file ac3enc.c.

Referenced by encode_frame(), and validate_options().

ff_ac3_adjust_frame_size()

void ff_ac3_adjust_frame_size

(

AC3EncodeContext *

s

)

Adjust the frame size to make the average bit rate match the target bit rate.

This is only needed for 11025, 22050, and 44100 sample rates or any E-AC-3.

Parameters

s	AC-3 encoder private context

Definition at line 253 of file ac3enc.c.

Referenced by encode_frame().

ff_ac3_compute_coupling_strategy()

void ff_ac3_compute_coupling_strategy

(

AC3EncodeContext *

s

)

Set the initial coupling strategy parameters prior to coupling analysis.

Parameters

s	AC-3 encoder private context

Definition at line 271 of file ac3enc.c.

Referenced by encode_frame().

ff_ac3_encode_frame_common_end()

int ff_ac3_encode_frame_common_end	(	AVCodecContext *	avctx,
		AVPacket *	avpkt,
		const AVFrame *	frame,
		int *	got_packet_ptr
	)

Definition at line 1742 of file ac3enc.c.

Referenced by encode_frame().

ff_ac3_fixed_encode_frame()

int ff_ac3_fixed_encode_frame	(	AVCodecContext *	avctx,
		AVPacket *	avpkt,
		const AVFrame *	frame,
		int *	got_packet_ptr
	)

ff_ac3_float_encode_frame()

int ff_ac3_float_encode_frame	(	AVCodecContext *	avctx,
		AVPacket *	avpkt,
		const AVFrame *	frame,
		int *	got_packet_ptr
	)

Variable Documentation

ff_ac3_channel_layouts

const uint64_t ff_ac3_channel_layouts[19]

List of supported channel layouts.

Definition at line 142 of file ac3enc.c.

ff_ac3_enc_options

const AVOption ff_ac3_enc_options[]

Definition at line 77 of file ac3enc.c.

ff_ac3_enc_defaults

const AVCodecDefault ff_ac3_enc_defaults[]

Definition at line 127 of file ac3enc.c.