ac3enc_fixed.c File Reference

fixed-point AC-3 encoder. More...

#include "audiodsp.h"
#include "ac3enc.h"
#include "codec_internal.h"
#include "eac3enc.h"
#include "kbdwin.h"
#include "ac3enc_template.c"

Go to the source code of this file.

Macros
#define	AC3ENC_FLOAT   0

Functions
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 int	ac3_fixed_mdct_init (AVCodecContext *avctx, AC3EncodeContext *s)
	Initialize MDCT tables.
static av_cold int	ac3_fixed_encode_init (AVCodecContext *avctx)

Variables
const FFCodec	ff_ac3_fixed_encoder

Detailed Description

fixed-point AC-3 encoder.

Definition in file ac3enc_fixed.c.

Macro Definition Documentation

AC3ENC_FLOAT

#define AC3ENC_FLOAT   0

Definition at line 29 of file ac3enc_fixed.c.

Function Documentation

sum_square_butterfly()

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

static

Definition at line 36 of file ac3enc_fixed.c.

Referenced by compute_rematrixing_strategy().

clip_coefficients()

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

static

Definition at line 46 of file ac3enc_fixed.c.

Referenced by apply_channel_coupling().

calc_cpl_coord()

static CoefType calc_cpl_coord ( CoefSumType energy_ch, CoefSumType energy_cpl )

static

Definition at line 56 of file ac3enc_fixed.c.

Referenced by apply_channel_coupling().

ac3_fixed_mdct_init()

static av_cold int ac3_fixed_mdct_init ( AVCodecContext * avctx, AC3EncodeContext * s )

static

Initialize MDCT tables.

Parameters

s	AC-3 encoder private context

Returns

0 on success, negative error code on failure

Definition at line 76 of file ac3enc_fixed.c.

Referenced by ac3_fixed_encode_init().

ac3_fixed_encode_init()

static av_cold int ac3_fixed_encode_init ( AVCodecContext * avctx )

static

Definition at line 96 of file ac3enc_fixed.c.

Variable Documentation

ff_ac3_fixed_encoder

const FFCodec ff_ac3_fixed_encoder

Initial value:

= {
    .p.name          = "ac3_fixed",
    CODEC_LONG_NAME("ATSC A/52A (AC-3)"),
    .p.type          = AVMEDIA_TYPE_AUDIO,
    .p.id            = AV_CODEC_ID_AC3,
    .p.capabilities  = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DELAY |
                       AV_CODEC_CAP_SMALL_LAST_FRAME | AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE,
    .priv_data_size  = sizeof(AC3EncodeContext),
    .init            = ac3_fixed_encode_init,
    FF_CODEC_ENCODE_CB(ff_ac3_encode_frame),
    .close           = ff_ac3_encode_close,
    CODEC_SAMPLEFMTS(AV_SAMPLE_FMT_S32P),
    .p.priv_class    = &ff_ac3enc_class,
    .caps_internal   = FF_CODEC_CAP_INIT_CLEANUP,
    CODEC_SAMPLERATES_ARRAY(ff_ac3_sample_rate_tab),
    CODEC_CH_LAYOUTS_ARRAY(ff_ac3_ch_layouts),
    .defaults        = ff_ac3_enc_defaults,
}

Definition at line 112 of file ac3enc_fixed.c.