atrac1.c File Reference

ATRAC1 compatible decoder. More...

#include <math.h>
#include <stddef.h>
#include <stdio.h>
#include "libavutil/float_dsp.h"
#include "avcodec.h"
#include "get_bits.h"
#include "fft.h"
#include "internal.h"
#include "sinewin.h"
#include "atrac.h"
#include "atrac1data.h"

Classes
struct	AT1SUCtx
	Sound unit struct, one unit is used per channel. More...
struct	AT1Ctx
	The atrac1 context, holds all needed parameters for decoding. More...

Macros
#define	AT1_MAX_BFU   52
	max number of block floating units in a sound unit
#define	AT1_SU_SIZE   212
	number of bytes in a sound unit
#define	AT1_SU_SAMPLES   512
	number of samples in a sound unit
#define	AT1_FRAME_SIZE   AT1_SU_SIZE * 2
#define	AT1_SU_MAX_BITS   AT1_SU_SIZE * 8
#define	AT1_MAX_CHANNELS   2
#define	AT1_QMF_BANDS   3
#define	IDX_LOW_BAND   0
#define	IDX_MID_BAND   1
#define	IDX_HIGH_BAND   2

Typedefs
typedef struct AT1SUCtx	AT1SUCtx
	Sound unit struct, one unit is used per channel.
typedef struct AT1Ctx	AT1Ctx
	The atrac1 context, holds all needed parameters for decoding.

Variables
AVCodec	ff_atrac1_decoder

Detailed Description

ATRAC1 compatible decoder.

This decoder handles raw ATRAC1 data and probably SDDS data.

Variable Documentation

ff_atrac1_decoder

AVCodec ff_atrac1_decoder

Initial value:

= {
    .name           = "atrac1",
    .long_name      = NULL_IF_CONFIG_SMALL("ATRAC1 (Adaptive TRansform Acoustic Coding)"),
    .type           = AVMEDIA_TYPE_AUDIO,
    .id             = AV_CODEC_ID_ATRAC1,
    .priv_data_size = sizeof(AT1Ctx),
    .init           = atrac1_decode_init,
    .close          = atrac1_decode_end,
    .decode         = atrac1_decode_frame,
    .capabilities   = AV_CODEC_CAP_DR1,
    .sample_fmts    = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP,
                                                      AV_SAMPLE_FMT_NONE },
}