omadec.c File Reference

This is a demuxer for Sony OpenMG Music files. More...

#include <inttypes.h>
#include "libavutil/channel_layout.h"
#include "avformat.h"
#include "internal.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/des.h"
#include "libavutil/mathematics.h"
#include "oma.h"
#include "pcm.h"
#include "id3v2.h"

Classes
struct	OMAContext

Macros
#define	OMA_RPROBE_M_VAL   48 + 1

Typedefs
typedef struct OMAContext	OMAContext

Variables
AVInputFormat	ff_oma_demuxer

Detailed Description

This is a demuxer for Sony OpenMG Music files.

Known file extensions: ".oma", "aa3" The format of such files consists of three parts:

• "ea3" header carrying overall info and metadata. Except for starting with "ea" instead of "ID", it's an ID3v2 header.
• "EA3" header is a Sony-specific header containing information about the OpenMG file: codec type (usually ATRAC, can also be MP3 or WMA), codec specific info (packet size, sample rate, channels and so on) and DRM related info (file encryption, content id).
• Sound data organized in packets follow the EA3 header (can be encrypted using the Sony DRM!).

Supported decoders: ATRAC3, ATRAC3+, MP3, LPCM

Variable Documentation

ff_oma_demuxer

AVInputFormat ff_oma_demuxer

Initial value:

= {
    .name           = "oma",
    .long_name      = NULL_IF_CONFIG_SMALL("Sony OpenMG audio"),
    .priv_data_size = sizeof(OMAContext),
    .read_probe     = oma_read_probe,
    .read_header    = oma_read_header,
    .read_packet    = oma_read_packet,
    .read_seek      = oma_read_seek,
    .read_close     = oma_read_close,
    .flags          = AVFMT_GENERIC_INDEX,
    .extensions     = "oma,omg,aa3",
    .codec_tag      = (const AVCodecTag* const []){ff_oma_codec_tags, 0},
}