libavformat/oma.c File Reference

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

#include "avformat.h"
#include "libavutil/intreadwrite.h"
#include "pcm.h"
#include "riff.h"
#include "id3v2.h"

Go to the source code of this file.

Defines
#define	EA3_HEADER_SIZE   96
#define	ID3v2_EA3_MAGIC   "ea3"
Enumerations
enum	{   OMA_CODECID_ATRAC3 = 0, OMA_CODECID_ATRAC3P = 1, OMA_CODECID_MP3 = 3, OMA_CODECID_LPCM = 4,   OMA_CODECID_WMA = 5 }
Functions
static int	oma_read_header (AVFormatContext *s, AVFormatParameters *ap)
static int	oma_read_packet (AVFormatContext *s, AVPacket *pkt)
static int	oma_read_probe (AVProbeData *p)
Variables
static const AVCodecTag	codec_oma_tags []
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!).

LIMITATIONS: This version supports only plain (unencrypted) OMA files. If any DRM-protected (encrypted) file is encountered you will get the corresponding error message. Try to remove the encryption using any Sony software (for example SonicStage). CODEC SUPPORT: Only ATRAC3 codec is currently supported!

Definition in file oma.c.

---

Define Documentation

#define EA3_HEADER_SIZE   96

Definition at line 52 of file oma.c.

Referenced by oma_read_header(), and oma_read_probe().

#define ID3v2_EA3_MAGIC   "ea3"

Definition at line 68 of file oma.c.

Referenced by oma_read_header(), and oma_read_probe().

---

Enumeration Type Documentation

anonymous enum

Enumerator:

OMA_CODECID_ATRAC3
OMA_CODECID_ATRAC3P
OMA_CODECID_MP3
OMA_CODECID_LPCM
OMA_CODECID_WMA

Definition at line 54 of file oma.c.

---

Function Documentation

static int oma_read_header	(	AVFormatContext *	s,
		AVFormatParameters *	ap
	)			[static]

Definition at line 70 of file oma.c.

static int oma_read_packet	(	AVFormatContext *	s,
		AVPacket *	pkt
	)			[static]

Definition at line 161 of file oma.c.

static int oma_read_probe

(

AVProbeData *

p

)

[static]

Definition at line 172 of file oma.c.

---

Variable Documentation

const AVCodecTag codec_oma_tags[] [static]

Initial value:

 {
    { CODEC_ID_ATRAC3,  OMA_CODECID_ATRAC3 },
    { CODEC_ID_ATRAC3P, OMA_CODECID_ATRAC3P },
    { CODEC_ID_MP3,     OMA_CODECID_MP3 },
}

Definition at line 62 of file oma.c.

AVInputFormat ff_oma_demuxer

Initial value:

 {
    "oma",
    NULL_IF_CONFIG_SMALL("Sony OpenMG audio"),
    0,
    oma_read_probe,
    oma_read_header,
    oma_read_packet,
    0,
    pcm_read_seek,
    .flags= AVFMT_GENERIC_INDEX,
    .extensions = "oma,aa3",
    .codec_tag= (const AVCodecTag* const []){codec_oma_tags, 0},
}

Definition at line 195 of file oma.c.