omadec.c File Reference

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

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

Go to the source code of this file.

Data Structures

struct  OMAContext

Macros

#define OMA_RPROBE_M_VAL   48 + 1

Typedefs

typedef struct OMAContext OMAContext

Functions

static void hex_log (AVFormatContext *s, int level, const char *name, const uint8_t *value, int len)
static int kset (AVFormatContext *s, const uint8_t *r_val, const uint8_t *n_val, int len)
static int rprobe (AVFormatContext *s, uint8_t *enc_header, unsigned size, const uint8_t *r_val)
static int nprobe (AVFormatContext *s, uint8_t *enc_header, unsigned size, const uint8_t *n_val)
static int decrypt_init (AVFormatContext *s, ID3v2ExtraMeta *em, uint8_t *header)
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)
static int oma_read_seek (struct AVFormatContext *s, int stream_index, int64_t timestamp, int flags)

Variables

static const uint64_t leaf_table []
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!).

CODEC SUPPORT: Only ATRAC3 codec is currently supported!

Definition in file omadec.c.

Macro Definition Documentation

#define OMA_RPROBE_M_VAL   48 + 1

Definition at line 116 of file omadec.c.

Referenced by rprobe().

Typedef Documentation

typedef struct OMAContext OMAContext

Function Documentation

static int decrypt_init ( AVFormatContext s,
ID3v2ExtraMeta em,
uint8_t *  header 
)
static

Definition at line 194 of file omadec.c.

Referenced by oma_read_header().

static void hex_log ( AVFormatContext s,
int  level,
const char *  name,
const uint8_t *  value,
int  len 
)
static

Definition at line 77 of file omadec.c.

Referenced by decrypt_init().

static int kset ( AVFormatContext s,
const uint8_t *  r_val,
const uint8_t *  n_val,
int  len 
)
static

Definition at line 88 of file omadec.c.

Referenced by decrypt_init(), and nprobe().

static int nprobe ( AVFormatContext s,
uint8_t *  enc_header,
unsigned  size,
const uint8_t *  n_val 
)
static

Definition at line 148 of file omadec.c.

static int oma_read_header ( AVFormatContext s,
AVFormatParameters ap 
)
static

Definition at line 278 of file omadec.c.

static int oma_read_packet ( AVFormatContext s,
AVPacket pkt 
)
static

Definition at line 393 of file omadec.c.

static int oma_read_probe ( AVProbeData p)
static

Definition at line 420 of file omadec.c.

static int oma_read_seek ( struct AVFormatContext s,
int  stream_index,
int64_t  timestamp,
int  flags 
)
static

Definition at line 448 of file omadec.c.

static int rprobe ( AVFormatContext s,
uint8_t *  enc_header,
unsigned  size,
const uint8_t *  r_val 
)
static

Definition at line 118 of file omadec.c.

Referenced by nprobe().

Variable Documentation

AVInputFormat ff_oma_demuxer
Initial value:
{
.name = "oma",
.long_name = NULL_IF_CONFIG_SMALL("Sony OpenMG audio"),
.priv_data_size = sizeof(OMAContext),
.extensions = "oma,omg,aa3",
.codec_tag = (const AVCodecTag* const []){ff_oma_codec_tags, 0},
}

Definition at line 474 of file omadec.c.

const uint64_t leaf_table[]
static
Initial value:
{
0xd79e8283acea4620, 0x7a9762f445afd0d8,
0x354d60a60b8c79f1, 0x584e1cde00b07aee,
0x1573cd93da7df623, 0x47f98d79620dd535
}

Definition at line 53 of file omadec.c.