Macros | Functions | Variables
ac3enc_fixed.c File Reference

fixed-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.


#define AC3ENC_FLOAT   0
#define FFT_FLOAT   0
#define FFT_FIXED_32   1


static void sum_square_butterfly (AC3EncodeContext *s, int64_t sum[4], const int32_t *coef0, const int32_t *coef1, int len)
static void clip_coefficients (AudioDSPContext *adsp, int32_t *coef, unsigned int len)
static CoefType calc_cpl_coord (CoefSumType energy_ch, CoefSumType energy_cpl)
static av_cold void ac3_fixed_mdct_end (AC3EncodeContext *s)
 Finalize MDCT and free allocated memory. More...
static av_cold int ac3_fixed_mdct_init (AC3EncodeContext *s)
 Initialize MDCT tables. More...
static av_cold int ac3_fixed_encode_init (AVCodecContext *avctx)


static const AVClass ac3enc_class
AVCodec ff_ac3_fixed_encoder

Detailed Description

fixed-point AC-3 encoder.

Definition in file ac3enc_fixed.c.

Macro Definition Documentation

#define AC3ENC_FLOAT   0

Definition at line 29 of file ac3enc_fixed.c.

#define FFT_FLOAT   0

Definition at line 30 of file ac3enc_fixed.c.

#define FFT_FIXED_32   1

Definition at line 31 of file ac3enc_fixed.c.


Definition at line 38 of file ac3enc_fixed.c.

Function Documentation

static void sum_square_butterfly ( AC3EncodeContext s,
int64_t  sum[4],
const int32_t coef0,
const int32_t coef1,
int  len 

Definition at line 48 of file ac3enc_fixed.c.

Referenced by compute_rematrixing_strategy().

static void clip_coefficients ( AudioDSPContext adsp,
int32_t coef,
unsigned int  len 

Definition at line 58 of file ac3enc_fixed.c.

Referenced by apply_channel_coupling().

static CoefType calc_cpl_coord ( CoefSumType  energy_ch,
CoefSumType  energy_cpl 

Definition at line 68 of file ac3enc_fixed.c.

Referenced by apply_channel_coupling().

static av_cold void ac3_fixed_mdct_end ( AC3EncodeContext s)

Finalize MDCT and free allocated memory.

sAC-3 encoder private context

Definition at line 89 of file ac3enc_fixed.c.

Referenced by ac3_fixed_encode_init().

static av_cold int ac3_fixed_mdct_init ( AC3EncodeContext s)

Initialize MDCT tables.

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

Definition at line 100 of file ac3enc_fixed.c.

Referenced by ac3_fixed_encode_init().

static av_cold int ac3_fixed_encode_init ( AVCodecContext avctx)

Definition at line 122 of file ac3enc_fixed.c.

Variable Documentation

const AVClass ac3enc_class
Initial value:
= {
.class_name = "Fixed-Point AC-3 Encoder",
.item_name = av_default_item_name,
.option = ac3_options,
Definition: version.h:85
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:235
static const AVOption ac3_options[]

Definition at line 41 of file ac3enc_fixed.c.

AVCodec ff_ac3_fixed_encoder
Initial value:
= {
.name = "ac3_fixed",
.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,
The codec allows calling the close function for deallocation even if the init function returned a fai...
Definition: internal.h:48
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
static av_cold int ac3_fixed_encode_init(AVCodecContext *avctx)
Definition: ac3enc_fixed.c:122
The codec does not modify any global variables in the init function, allowing to call the init functi...
Definition: internal.h:40
av_cold int ff_ac3_encode_close(AVCodecContext *avctx)
Finalize encoding and free any memory allocated by the encoder.
Definition: ac3enc.c:2045
const uint64_t ff_ac3_channel_layouts[19]
List of supported channel layouts.
Definition: ac3enc.c:83
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:115
signed 32 bits, planar
Definition: samplefmt.h:68
Audio sample formats.
Definition: samplefmt.h:58
int ff_ac3_fixed_encode_frame(AVCodecContext *avctx, AVPacket *avpkt, const AVFrame *frame, int *got_packet_ptr)
static const AVCodecDefault ac3_defaults[]
AC-3 encoder private context.
Definition: ac3enc.h:161
static const AVClass ac3enc_class
Definition: ac3enc_fixed.c:41
static enum AVSampleFormat sample_fmts[]
Definition: adpcmenc.c:940
const int ff_ac3_sample_rate_tab[]
Definition: ac3tab.c:129

Definition at line 133 of file ac3enc_fixed.c.