FFmpeg
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_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 void ac3_float_mdct_end (AC3EncodeContext *s)
 Finalize MDCT and free allocated memory. More...
 
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 AVCodec 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_end()

static av_cold void ac3_float_mdct_end ( AC3EncodeContext s)
static

Finalize MDCT and free allocated memory.

Parameters
sAC-3 encoder private context

Definition at line 87 of file ac3enc_float.c.

Referenced by ff_ac3_float_encode_init().

◆ ac3_float_mdct_init()

static av_cold int ac3_float_mdct_init ( AC3EncodeContext s)
static

Initialize MDCT tables.

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

Definition at line 99 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 114 of file ac3enc_float.c.

Variable Documentation

◆ ff_ac3_encoder

const AVCodec ff_ac3_encoder
Initial value:
= {
.name = "ac3",
.long_name = NULL_IF_CONFIG_SMALL("ATSC A/52A (AC-3)"),
.capabilities = AV_CODEC_CAP_DR1,
.priv_data_size = sizeof(AC3EncodeContext),
.priv_class = &ff_ac3enc_class,
.supported_samplerates = ff_ac3_sample_rate_tab,
.channel_layouts = ff_ac3_channel_layouts,
.defaults = ff_ac3_enc_defaults,
}

Definition at line 126 of file ac3enc_float.c.

AV_SAMPLE_FMT_FLTP
@ AV_SAMPLE_FMT_FLTP
float, planar
Definition: samplefmt.h:69
FF_CODEC_CAP_INIT_THREADSAFE
#define FF_CODEC_CAP_INIT_THREADSAFE
The codec does not modify any global variables in the init function, allowing to call the init functi...
Definition: internal.h:42
AV_CODEC_ID_AC3
@ AV_CODEC_ID_AC3
Definition: codec_id.h:426
ff_ac3_enc_defaults
const AVCodecDefault ff_ac3_enc_defaults[]
Definition: ac3enc.c:135
sample_fmts
static enum AVSampleFormat sample_fmts[]
Definition: adpcmenc.c:948
ff_ac3_float_encode_frame
int ff_ac3_float_encode_frame(AVCodecContext *avctx, AVPacket *avpkt, const AVFrame *frame, int *got_packet_ptr)
init
static int init
Definition: av_tx.c:47
ff_ac3_channel_layouts
const uint64_t ff_ac3_channel_layouts[19]
List of supported channel layouts.
Definition: ac3enc.c:150
AVMEDIA_TYPE_AUDIO
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
AC3EncodeContext
AC-3 encoder private context.
Definition: ac3enc.h:156
ff_ac3_float_encode_init
av_cold int ff_ac3_float_encode_init(AVCodecContext *avctx)
Definition: ac3enc_float.c:114
AV_CODEC_CAP_DR1
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() or get_encode_buffer() for allocating buffers and supports custom allocators.
Definition: codec.h:52
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:117
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:96
FF_CODEC_CAP_INIT_CLEANUP
#define FF_CODEC_CAP_INIT_CLEANUP
The codec allows calling the close function for deallocation even if the init function returned a fai...
Definition: internal.h:50
AVSampleFormat
AVSampleFormat
Audio sample formats.
Definition: samplefmt.h:58
ff_ac3enc_class
const AVClass ff_ac3enc_class
Definition: ac3enc.c:128
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:2123