libavformat/rmdec.c File Reference

#include "libavutil/avstring.h"
#include "libavutil/intreadwrite.h"
#include "avformat.h"
#include "rm.h"

Go to the source code of this file.

Data Structures

struct RMStream

struct RMDemuxContext

Defines

#define RAW_PACKET_SIZE 1000

Functions

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

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

static void rm_read_metadata (AVFormatContext *s, int wide)

RMStream * ff_rm_alloc_rmstream (void)

void ff_rm_free_rmstream (RMStream *rms)

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

int ff_rm_read_mdpr_codecdata (AVFormatContext *s, ByteIOContext *pb, AVStream *st, RMStream *rst, int codec_data_size)

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

static int rm_read_header_old (AVFormatContext *s, AVFormatParameters *ap)

static int rm_read_header (AVFormatContext *s, AVFormatParameters *ap)

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

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

static int rm_assemble_video_frame (AVFormatContext *s, ByteIOContext *pb, RMDemuxContext *rm, RMStream *vst, AVPacket *pkt, int len)

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

int ff_rm_parse_packet (AVFormatContext *s, ByteIOContext *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, ByteIOContext *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 (AVProbeData *p)

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

Variables

AVInputFormat rm_demuxer

AVInputFormat rdt_demuxer

Define Documentation

#define RAW_PACKET_SIZE 1000

Definition at line 425 of file rmdec.c.

Referenced by rm_read_packet().

Function Documentation

RMStream* ff_rm_alloc_rmstream ( void )

Definition at line 81 of file rmdec.c.

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

void ff_rm_free_rmstream ( RMStream * rms )

Definition at line 88 of file rmdec.c.

Referenced by rdt_free_extradata(), and rm_read_close().

int ff_rm_parse_packet	(	AVFormatContext *	s,
		ByteIOContext *	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 ByteIOContext 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	pointer to an integer containing the packet flags, may be updated
	ts	pointer to timestamp, may be updated

Returns:: >=0 on success (where >0 indicates there are cached samples that can be retrieved with subsequent calls to ff_rm_retrieve_cache()), errno codes on error

Definition at line 578 of file rmdec.c.

Referenced by rdt_parse_packet(), and rm_read_packet().

int ff_rm_read_mdpr_codecdata	(	AVFormatContext *	s,
		ByteIOContext *	pb,
		AVStream *	st,
		RMStream *	rst,
		int	codec_data_size
	)

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

Parameters:

	s	context containing RMContext and ByteIOContext 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 228 of file rmdec.c.

Referenced by rdt_load_mdpr(), and rm_read_header().

int ff_rm_retrieve_cache	(	AVFormatContext *	s,
		ByteIOContext *	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 ByteIOContext 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 677 of file rmdec.c.

Referenced by rdt_parse_packet(), and rm_read_packet().

static int get_num	(	ByteIOContext *	pb,
		int *	len
	)			`[static]`

Definition at line 408 of file rmdec.c.

Referenced by rm_assemble_video_frame().

static void get_str8	(	ByteIOContext *	pb,
		char *	buf,
		int	buf_size
	)			`[static]`

Definition at line 65 of file rmdec.c.

Referenced by rm_read_audio_stream_info(), and rm_read_header().

static void get_strl	(	ByteIOContext *	pb,
		char *	buf,
		int	buf_size,
		int	len
	)			`[inline, static]`

Definition at line 51 of file rmdec.c.

Referenced by get_str8(), and rm_read_metadata().

static void rm_ac3_swap_bytes	(	AVStream *	st,
		AVPacket *	pkt
	)			`[inline, static]`

Definition at line 563 of file rmdec.c.

Referenced by ff_rm_parse_packet(), and rm_read_packet().

static int rm_assemble_video_frame	(	AVFormatContext *	s,
		ByteIOContext *	pb,
		RMDemuxContext *	rm,
		RMStream *	vst,
		AVPacket *	pkt,
		int	len
	)			`[static]`

Definition at line 483 of file rmdec.c.

Referenced by ff_rm_parse_packet().

static int rm_probe ( AVProbeData * p ) [static]

Definition at line 771 of file rmdec.c.

static int rm_read_audio_stream_info	(	AVFormatContext *	s,
		ByteIOContext *	pb,
		AVStream *	st,
		RMStream *	ast,
		int	read_all
	)			`[static]`

Definition at line 93 of file rmdec.c.

Referenced by ff_rm_read_mdpr_codecdata(), and rm_read_header_old().

static int rm_read_close ( AVFormatContext * s ) [static]

Definition at line 761 of file rmdec.c.

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

Definition at line 784 of file rmdec.c.

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

Definition at line 311 of file rmdec.c.

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

Definition at line 298 of file rmdec.c.

Referenced by rm_read_header().

static void rm_read_metadata	(	AVFormatContext *	s,
		int	wide
	)			`[static]`

Definition at line 70 of file rmdec.c.

Referenced by rm_read_audio_stream_info(), and rm_read_header().

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

Definition at line 699 of file rmdec.c.

static int sync	(	AVFormatContext *	s,
		int64_t *	timestamp,
		int *	flags,
		int *	stream_index,
		int64_t *	pos
	)			`[static]`

Definition at line 427 of file rmdec.c.

Referenced by avi_read_packet(), ogg_read_page(), rm_read_dts(), and rm_read_packet().

Variable Documentation

AVInputFormat rdt_demuxer

Initial value:

 {
    "rdt",
    NULL_IF_CONFIG_SMALL("RDT demuxer"),
    sizeof(RMDemuxContext),
    NULL,
    NULL,
    NULL,
    rm_read_close,
}

Definition at line 839 of file rmdec.c.

Referenced by rdt_new_extradata().

AVInputFormat rm_demuxer

Initial value:

 {
    "rm",
    NULL_IF_CONFIG_SMALL("RealMedia format"),
    sizeof(RMDemuxContext),
    rm_probe,
    rm_read_header,
    rm_read_packet,
    rm_read_close,
    NULL,
    rm_read_dts,
}

Definition at line 827 of file rmdec.c.


Data Structures
struct	RMStream
struct	RMDemuxContext
Defines
#define	RAW_PACKET_SIZE 1000
Functions
static void	get_strl (ByteIOContext pb, char buf, int buf_size, int len)
static void	get_str8 (ByteIOContext pb, char buf, int buf_size)
static void	rm_read_metadata (AVFormatContext *s, int wide)
RMStream *	ff_rm_alloc_rmstream (void)
void	ff_rm_free_rmstream (RMStream *rms)
static int	rm_read_audio_stream_info (AVFormatContext s, ByteIOContext pb, AVStream st, RMStream ast, int read_all)
int	ff_rm_read_mdpr_codecdata (AVFormatContext s, ByteIOContext pb, AVStream st, RMStream rst, int codec_data_size)
	Read the MDPR chunk, which contains stream-specific codec initialization parameters.
static int	rm_read_header_old (AVFormatContext s, AVFormatParameters ap)
static int	rm_read_header (AVFormatContext s, AVFormatParameters ap)
static int	get_num (ByteIOContext pb, int len)
static int	sync (AVFormatContext s, int64_t timestamp, int flags, int stream_index, int64_t *pos)
static int	rm_assemble_video_frame (AVFormatContext s, ByteIOContext pb, RMDemuxContext rm, RMStream vst, AVPacket *pkt, int len)
static void	rm_ac3_swap_bytes (AVStream st, AVPacket pkt)
int	ff_rm_parse_packet (AVFormatContext s, ByteIOContext 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, ByteIOContext 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 (AVProbeData *p)
static int64_t	rm_read_dts (AVFormatContext s, int stream_index, int64_t ppos, int64_t pos_limit)
Variables
AVInputFormat	rm_demuxer
AVInputFormat	rdt_demuxer