atrac3.c File Reference

ATRAC3 compatible decoder. More...

#include <math.h>
#include <stddef.h>
#include <stdio.h>
#include "libavutil/attributes.h"
#include "libavutil/float_dsp.h"
#include "libavutil/libm.h"
#include "avcodec.h"
#include "bytestream.h"
#include "fft.h"
#include "get_bits.h"
#include "internal.h"
#include "atrac.h"
#include "atrac3data.h"

Classes
struct	GainBlock
struct	TonalComponent
struct	ChannelUnit
struct	ATRAC3Context

Macros
#define	MIN_CHANNELS   1
#define	MAX_CHANNELS   8
#define	MAX_JS_PAIRS   8 / 2
#define	JOINT_STEREO   0x12
#define	SINGLE   0x2
#define	SAMPLES_PER_FRAME   1024
#define	MDCT_SIZE   512
#define	INTERPOLATE(old, new, nsample)   ((old) + (nsample) * 0.125 * ((new) - (old)))

Typedefs
typedef struct GainBlock	GainBlock
typedef struct TonalComponent	TonalComponent
typedef struct ChannelUnit	ChannelUnit
typedef struct ATRAC3Context	ATRAC3Context

Variables
AVCodec	ff_atrac3_decoder
AVCodec	ff_atrac3al_decoder

Detailed Description

ATRAC3 compatible decoder.

This decoder handles Sony's ATRAC3 data.

Container formats used to store ATRAC3 data: RealMedia (.rm), RIFF WAV (.wav, .at3), Sony OpenMG (.oma, .aa3).

To use this decoder, a calling application must supply the extradata bytes provided in the containers above.

Variable Documentation

ff_atrac3_decoder

AVCodec ff_atrac3_decoder

Initial value:

= {
    .name             = "atrac3",
    .long_name        = NULL_IF_CONFIG_SMALL("ATRAC3 (Adaptive TRansform Acoustic Coding 3)"),
    .type             = AVMEDIA_TYPE_AUDIO,
    .id               = AV_CODEC_ID_ATRAC3,
    .priv_data_size   = sizeof(ATRAC3Context),
    .init             = atrac3_decode_init,
    .close            = atrac3_decode_close,
    .decode           = atrac3_decode_frame,
    .capabilities     = AV_CODEC_CAP_SUBFRAMES | AV_CODEC_CAP_DR1,
    .sample_fmts      = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP,
                                                        AV_SAMPLE_FMT_NONE },
}

ff_atrac3al_decoder

AVCodec ff_atrac3al_decoder

Initial value:

= {
    .name             = "atrac3al",
    .long_name        = NULL_IF_CONFIG_SMALL("ATRAC3 AL (Adaptive TRansform Acoustic Coding 3 Advanced Lossless)"),
    .type             = AVMEDIA_TYPE_AUDIO,
    .id               = AV_CODEC_ID_ATRAC3AL,
    .priv_data_size   = sizeof(ATRAC3Context),
    .init             = atrac3_decode_init,
    .close            = atrac3_decode_close,
    .decode           = atrac3al_decode_frame,
    .capabilities     = AV_CODEC_CAP_SUBFRAMES | AV_CODEC_CAP_DR1,
    .sample_fmts      = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP,
                                                        AV_SAMPLE_FMT_NONE },
}