rmdec.c File Reference

#include <inttypes.h>
#include "libavutil/avassert.h"
#include "libavutil/channel_layout.h"
#include "libavutil/internal.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/dict.h"
#include "libavutil/mem.h"
#include "avformat.h"
#include "avio_internal.h"
#include "demux.h"
#include "internal.h"
#include "rmsipr.h"
#include "rm.h"

Go to the source code of this file.

Data Structures
struct	RMStream
struct	RMDemuxContext

Macros
#define	DEINT_ID_GENR   MKTAG('g', 'e', 'n', 'r')
	interleaving for Cooker/ATRAC
#define	DEINT_ID_INT0   MKTAG('I', 'n', 't', '0')
	no interleaving needed
#define	DEINT_ID_INT4   MKTAG('I', 'n', 't', '4')
	interleaving for 28.8
#define	DEINT_ID_SIPR   MKTAG('s', 'i', 'p', 'r')
	interleaving for Sipro
#define	DEINT_ID_VBRF   MKTAG('v', 'b', 'r', 'f')
	VBR case for AAC.
#define	DEINT_ID_VBRS   MKTAG('v', 'b', 'r', 's')
	VBR case for AAC.
#define	RAW_PACKET_SIZE   1000

Functions
static void	get_strl (AVIOContext *pb, char *buf, int buf_size, int len)
static void	get_str8 (AVIOContext *pb, char *buf, int buf_size)
static int	rm_read_extradata (AVFormatContext *s, AVIOContext *pb, AVCodecParameters *par, unsigned size)
static void	rm_read_metadata (AVFormatContext *s, AVIOContext *pb, int wide)
RMStream *	ff_rm_alloc_rmstream (void)
void	ff_rm_free_rmstream (RMStream *rms)
static int	rm_read_audio_stream_info (AVFormatContext *s, AVIOContext *pb, AVStream *st, RMStream *ast, int read_all)
int	ff_rm_read_mdpr_codecdata (AVFormatContext *s, AVIOContext *pb, AVStream *st, RMStream *rst, unsigned int codec_data_size, const uint8_t *mime)
	Read the MDPR chunk, which contains stream-specific codec initialization parameters.
static int	rm_read_index (AVFormatContext *s)
	this function assumes that the demuxer has already seeked to the start of the INDX chunk, and will bail out if not.
static int	rm_read_header_old (AVFormatContext *s)
static int	rm_read_multi (AVFormatContext *s, AVIOContext *pb, AVStream *st, char *mime)
static int	rm_read_header (AVFormatContext *s)
static int	get_num (AVIOContext *pb, int *len)
static int	rm_sync (AVFormatContext *s, int64_t *timestamp, int *flags, int *stream_index, int64_t *pos)
static int	rm_assemble_video_frame (AVFormatContext *s, AVIOContext *pb, RMDemuxContext *rm, RMStream *vst, AVPacket *pkt, int len, int *pseq, int64_t *timestamp)
static void	rm_ac3_swap_bytes (AVStream *st, AVPacket *pkt)
static int	readfull (AVFormatContext *s, AVIOContext *pb, uint8_t *dst, int n)
int	ff_rm_parse_packet (AVFormatContext *s, AVIOContext *pb, AVStream *st, RMStream *ast, int len, AVPacket *pkt, int *seq, int flags, int64_t timestamp)
	Parse one rm-stream packet from the input bytestream.
int	ff_rm_retrieve_cache (AVFormatContext *s, AVIOContext *pb, AVStream *st, RMStream *ast, AVPacket *pkt)
	Retrieve one cached packet from the rm-context.
static int	rm_read_packet (AVFormatContext *s, AVPacket *pkt)
static int	rm_read_close (AVFormatContext *s)
static int	rm_probe (const AVProbeData *p)
static int64_t	rm_read_dts (AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit)
static int	rm_read_seek (AVFormatContext *s, int stream_index, int64_t pts, int flags)
static int	ivr_probe (const AVProbeData *p)
static int	ivr_read_header (AVFormatContext *s)
static int	ivr_read_packet (AVFormatContext *s, AVPacket *pkt)

Variables
const FFInputFormat	ff_rm_demuxer
const FFInputFormat	ff_rdt_demuxer
const FFInputFormat	ff_ivr_demuxer

Macro Definition Documentation

DEINT_ID_GENR

#define DEINT_ID_GENR   MKTAG('g', 'e', 'n', 'r')

interleaving for Cooker/ATRAC

Definition at line 37 of file rmdec.c.

Referenced by ff_rm_parse_packet(), and rm_read_audio_stream_info().

DEINT_ID_INT0

#define DEINT_ID_INT0   MKTAG('I', 'n', 't', '0')

no interleaving needed

Definition at line 38 of file rmdec.c.

Referenced by rm_read_audio_stream_info().

DEINT_ID_INT4

#define DEINT_ID_INT4   MKTAG('I', 'n', 't', '4')

interleaving for 28.8

Definition at line 39 of file rmdec.c.

Referenced by ff_rm_parse_packet(), and rm_read_audio_stream_info().

DEINT_ID_SIPR

#define DEINT_ID_SIPR   MKTAG('s', 'i', 'p', 'r')

interleaving for Sipro

Definition at line 40 of file rmdec.c.

Referenced by ff_rm_parse_packet(), and rm_read_audio_stream_info().

DEINT_ID_VBRF

#define DEINT_ID_VBRF   MKTAG('v', 'b', 'r', 'f')

VBR case for AAC.

Definition at line 41 of file rmdec.c.

Referenced by ff_rm_parse_packet(), ff_rm_retrieve_cache(), and rm_read_audio_stream_info().

DEINT_ID_VBRS

#define DEINT_ID_VBRS   MKTAG('v', 'b', 'r', 's')

VBR case for AAC.

Definition at line 42 of file rmdec.c.

Referenced by ff_rm_parse_packet(), ff_rm_retrieve_cache(), and rm_read_audio_stream_info().

RAW_PACKET_SIZE

#define RAW_PACKET_SIZE   1000

Definition at line 698 of file rmdec.c.

Function Documentation

get_strl()

static void get_strl ( AVIOContext * pb, char * buf, int buf_size, int len )

inlinestatic

Definition at line 70 of file rmdec.c.

Referenced by ff_rm_read_mdpr_codecdata(), get_str8(), and rm_read_metadata().

get_str8()

static void get_str8 ( AVIOContext * pb, char * buf, int buf_size )

static

Definition at line 78 of file rmdec.c.

Referenced by ff_rm_read_mdpr_codecdata(), rm_read_audio_stream_info(), and rm_read_header().

rm_read_extradata()

static int rm_read_extradata ( AVFormatContext * s, AVIOContext * pb, AVCodecParameters * par, unsigned size )

static

Definition at line 83 of file rmdec.c.

Referenced by ff_rm_read_mdpr_codecdata(), and rm_read_audio_stream_info().

rm_read_metadata()

static void rm_read_metadata ( AVFormatContext * s, AVIOContext * pb, int wide )

static

Definition at line 92 of file rmdec.c.

Referenced by rm_read_audio_stream_info(), and rm_read_header().

ff_rm_alloc_rmstream()

RMStream * ff_rm_alloc_rmstream

(

void

)

Definition at line 106 of file rmdec.c.

Referenced by ivr_read_header(), rdt_parse_sdp_line(), rm_read_header(), rm_read_header_old(), and rm_read_multi().

ff_rm_free_rmstream()

void ff_rm_free_rmstream

(

RMStream *

rms

)

Definition at line 115 of file rmdec.c.

Referenced by rdt_close_context(), and rm_read_close().

rm_read_audio_stream_info()

static int rm_read_audio_stream_info ( AVFormatContext * s, AVIOContext * pb, AVStream * st, RMStream * ast, int read_all )

static

Definition at line 123 of file rmdec.c.

Referenced by ff_rm_read_mdpr_codecdata(), and rm_read_header_old().

ff_rm_read_mdpr_codecdata()

int ff_rm_read_mdpr_codecdata	(	AVFormatContext *	s,
		AVIOContext *	pb,
		AVStream *	st,
		RMStream *	rst,
		unsigned int	codec_data_size,
		const uint8_t *	mime )

Read the MDPR chunk, which contains stream-specific codec initialization parameters.

Parameters

s	context containing RMContext and AVIOContext for stream reading
pb	context to read the data from
st	the stream that the MDPR chunk belongs to and where to store the parameters read from the chunk into
rst	real-specific stream information
codec_data_size	size of the MDPR chunk

Returns

0 on success, errno codes on error

Definition at line 318 of file rmdec.c.

Referenced by ivr_read_header(), rdt_load_mdpr(), rm_read_header(), and rm_read_multi().

rm_read_index()

static int rm_read_index ( AVFormatContext * s )

static

this function assumes that the demuxer has already seeked to the start of the INDX chunk, and will bail out if not.

Definition at line 432 of file rmdec.c.

Referenced by rm_read_header().

rm_read_header_old()

static int rm_read_header_old ( AVFormatContext * s )

static

Definition at line 495 of file rmdec.c.

Referenced by rm_read_header().

rm_read_multi()

static int rm_read_multi ( AVFormatContext * s, AVIOContext * pb, AVStream * st, char * mime )

static

Definition at line 510 of file rmdec.c.

Referenced by ivr_read_header(), and rm_read_header().

rm_read_header()

static int rm_read_header ( AVFormatContext * s )

static

Definition at line 551 of file rmdec.c.

get_num()

static int get_num ( AVIOContext * pb, int * len )

static

Definition at line 681 of file rmdec.c.

Referenced by rm_assemble_video_frame().

rm_sync()

static int rm_sync ( AVFormatContext * s, int64_t * timestamp, int * flags, int * stream_index, int64_t * pos )

static

Definition at line 700 of file rmdec.c.

Referenced by rm_read_dts(), and rm_read_packet().

rm_assemble_video_frame()

static int rm_assemble_video_frame ( AVFormatContext * s, AVIOContext * pb, RMDemuxContext * rm, RMStream * vst, AVPacket * pkt, int len, int * pseq, int64_t * timestamp )

static

Definition at line 780 of file rmdec.c.

Referenced by ff_rm_parse_packet().

rm_ac3_swap_bytes()

static void rm_ac3_swap_bytes ( AVStream * st, AVPacket * pkt )

inlinestatic

Definition at line 885 of file rmdec.c.

Referenced by ff_rm_parse_packet().

readfull()

static int readfull ( AVFormatContext * s, AVIOContext * pb, uint8_t * dst, int n )

static

Definition at line 899 of file rmdec.c.

Referenced by ff_rm_parse_packet().

ff_rm_parse_packet()

int ff_rm_parse_packet	(	AVFormatContext *	s,
		AVIOContext *	pb,
		AVStream *	st,
		RMStream *	rst,
		int	len,
		AVPacket *	pkt,
		int *	seq,
		int	flags,
		int64_t	ts )

Parse one rm-stream packet from the input bytestream.

Parameters

s	context containing RMContext and AVIOContext for stream reading
pb	context to read the data from
st	stream to which the packet to be read belongs
rst	Real-specific stream information
len	packet length to read from the input
pkt	packet location to store the parsed packet data
seq	pointer to an integer containing the sequence number, may be updated
flags	the packet flags
ts	timestamp of the current packet

Returns

<0 on error, 0 if a packet was placed in the pkt pointer. A value >0 means that no data was placed in pkt, but that cached data is available by calling ff_rm_retrieve_cache().

Definition at line 910 of file rmdec.c.

Referenced by ivr_read_packet(), rdt_parse_packet(), and rm_read_packet().

ff_rm_retrieve_cache()

int ff_rm_retrieve_cache	(	AVFormatContext *	s,
		AVIOContext *	pb,
		AVStream *	st,
		RMStream *	rst,
		AVPacket *	pkt )

Retrieve one cached packet from the rm-context.

The real container can store several packets (as interpreted by the codec) in a single container packet, which means the demuxer holds some back when the first container packet is parsed and returned. The result is that rm->audio_pkt_cnt is a positive number, the amount of cached packets. Using this function, each of those packets can be retrieved sequentially.

Parameters

s	context containing RMContext and AVIOContext for stream reading
pb	context to read the data from
st	stream that this packet belongs to
rst	Real-specific stream information
pkt	location to store the packet data

Returns

the number of samples left for subsequent calls to this same function, or 0 if all samples have been retrieved.

Definition at line 998 of file rmdec.c.

Referenced by ivr_read_packet(), rdt_parse_packet(), and rm_read_packet().

rm_read_packet()

static int rm_read_packet ( AVFormatContext * s, AVPacket * pkt )

static

Definition at line 1030 of file rmdec.c.

rm_read_close()

static int rm_read_close ( AVFormatContext * s )

static

Definition at line 1090 of file rmdec.c.

rm_probe()

static int rm_probe ( const AVProbeData * p )

static

Definition at line 1100 of file rmdec.c.

rm_read_dts()

static int64_t rm_read_dts ( AVFormatContext * s, int stream_index, int64_t * ppos, int64_t pos_limit )

static

Definition at line 1113 of file rmdec.c.

rm_read_seek()

static int rm_read_seek ( AVFormatContext * s, int stream_index, int64_t pts, int flags )

static

Definition at line 1159 of file rmdec.c.

ivr_probe()

static int ivr_probe ( const AVProbeData * p )

static

Definition at line 1192 of file rmdec.c.

ivr_read_header()

static int ivr_read_header ( AVFormatContext * s )

static

Definition at line 1201 of file rmdec.c.

ivr_read_packet()

static int ivr_read_packet ( AVFormatContext * s, AVPacket * pkt )

static

Definition at line 1341 of file rmdec.c.

Variable Documentation

ff_rm_demuxer

const FFInputFormat ff_rm_demuxer

Initial value:

= {
    .p.name         = "rm",
    .p.long_name    = NULL_IF_CONFIG_SMALL("RealMedia"),
    .priv_data_size = sizeof(RMDemuxContext),
    .flags_internal = FF_INFMT_FLAG_INIT_CLEANUP,
    .read_probe     = rm_probe,
    .read_header    = rm_read_header,
    .read_packet    = rm_read_packet,
    .read_close     = rm_read_close,
    .read_timestamp = rm_read_dts,
    .read_seek      = rm_read_seek,
}

Definition at line 1171 of file rmdec.c.

ff_rdt_demuxer

const FFInputFormat ff_rdt_demuxer

Initial value:

= {
    .p.name         = "rdt",
    .p.long_name    = NULL_IF_CONFIG_SMALL("RDT demuxer"),
    .p.flags        = AVFMT_NOFILE,
    .priv_data_size = sizeof(RMDemuxContext),
    .read_close     = rm_read_close,
}

Definition at line 1184 of file rmdec.c.

Referenced by rdt_init().

ff_ivr_demuxer

const FFInputFormat ff_ivr_demuxer

Initial value:

= {
    .p.name         = "ivr",
    .p.long_name    = NULL_IF_CONFIG_SMALL("IVR (Internet Video Recording)"),
    .p.extensions   = "ivr",
    .priv_data_size = sizeof(RMDemuxContext),
    .flags_internal = FF_INFMT_FLAG_INIT_CLEANUP,
    .read_probe     = ivr_probe,
    .read_header    = ivr_read_header,
    .read_packet    = ivr_read_packet,
    .read_close     = rm_read_close,
}

Definition at line 1422 of file rmdec.c.