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Macros | Functions | Variables
ac3enc_float.c File Reference
#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

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)
 
av_cold void ff_ac3_float_mdct_end (AC3EncodeContext *s)
 Finalize MDCT and free allocated memory. More...
 
av_cold int ff_ac3_float_mdct_init (AC3EncodeContext *s)
 Initialize MDCT tables. More...
 
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

◆ CONFIG_AC3ENC_FLOAT

#define CONFIG_AC3ENC_FLOAT   1

Definition at line 29 of file ac3enc_float.c.

◆ AC3ENC_TYPE

#define AC3ENC_TYPE   AC3ENC_TYPE_AC3

Definition at line 37 of file ac3enc_float.c.

Function Documentation

◆ scale_coefficients()

static void scale_coefficients ( AC3EncodeContext s)
static

Definition at line 50 of file ac3enc_float.c.

◆ clip_coefficients()

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

Definition at line 63 of file ac3enc_float.c.

◆ calc_cpl_coord()

static CoefType calc_cpl_coord ( CoefSumType  energy_ch,
CoefSumType  energy_cpl 
)
static

Definition at line 73 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 81 of file ac3enc_float.c.

◆ ff_ac3_float_mdct_end()

av_cold void ff_ac3_float_mdct_end ( AC3EncodeContext s)

Finalize MDCT and free allocated memory.

Parameters
sAC-3 encoder private context

Definition at line 97 of file ac3enc_float.c.

Referenced by ff_ac3_encode_init().

◆ ff_ac3_float_mdct_init()

av_cold int ff_ac3_float_mdct_init ( AC3EncodeContext s)

Initialize MDCT tables.

Parameters
sAC-3 encoder private context
Returns
0 on success, negative error code on failure

Definition at line 110 of file ac3enc_float.c.

Referenced by ff_ac3_encode_init().

◆ ff_ac3_float_encode_init()

av_cold int ff_ac3_float_encode_init ( AVCodecContext avctx)

Definition at line 132 of file ac3enc_float.c.

Variable Documentation

◆ ac3enc_class

const AVClass ac3enc_class
static
Initial value:
= {
.class_name = "AC-3 Encoder",
.item_name = av_default_item_name,
.option = ac3_options,
}

Definition at line 39 of file ac3enc_float.c.

◆ ff_ac3_encoder

AVCodec ff_ac3_encoder
Initial value:
= {
.name = "ac3",
.long_name = NULL_IF_CONFIG_SMALL("ATSC A/52A (AC-3)"),
.priv_data_size = sizeof(AC3EncodeContext),
.priv_class = &ac3enc_class,
.supported_samplerates = ff_ac3_sample_rate_tab,
.channel_layouts = ff_ac3_channel_layouts,
.defaults = ac3_defaults,
}

Definition at line 141 of file ac3enc_float.c.

AV_SAMPLE_FMT_FLTP
@ AV_SAMPLE_FMT_FLTP
float, planar
Definition: samplefmt.h:69
AV_CODEC_ID_AC3
@ AV_CODEC_ID_AC3
Definition: codec_id.h:413
init
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
sample_fmts
static enum AVSampleFormat sample_fmts[]
Definition: adpcmenc.c:716
ff_ac3_float_encode_frame
int ff_ac3_float_encode_frame(AVCodecContext *avctx, AVPacket *avpkt, const AVFrame *frame, int *got_packet_ptr)
ac3enc_class
static const AVClass ac3enc_class
Definition: ac3enc_float.c:39
ff_ac3_channel_layouts
const uint64_t ff_ac3_channel_layouts[19]
List of supported channel layouts.
Definition: ac3enc.c:81
AVMEDIA_TYPE_AUDIO
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
LIBAVUTIL_VERSION_INT
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
av_default_item_name
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:235
AC3EncodeContext
AC-3 encoder private context.
Definition: ac3enc.h:162
ff_ac3_float_encode_init
av_cold int ff_ac3_float_encode_init(AVCodecContext *avctx)
Definition: ac3enc_float.c:132
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:188
AV_SAMPLE_FMT_NONE
@ AV_SAMPLE_FMT_NONE
Definition: samplefmt.h:59
ff_ac3_sample_rate_tab
const int ff_ac3_sample_rate_tab[]
Definition: ac3tab.c:129
AVSampleFormat
AVSampleFormat
Audio sample formats.
Definition: samplefmt.h:58
ac3_defaults
static const AVCodecDefault ac3_defaults[]
Definition: ac3enc_opts_template.c:79
ff_ac3_encode_close
av_cold int ff_ac3_encode_close(AVCodecContext *avctx)
Finalize encoding and free any memory allocated by the encoder.
Definition: ac3enc.c:2016
ac3_options
static const AVOption ac3_options[]
Definition: ac3enc_opts_template.c:26