libavformat/rmdec.c File Reference

#include "libavutil/avstring.h"
#include "libavutil/intreadwrite.h"
#include "avformat.h"
#include "riff.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 int rm_read_extradata (ByteIOContext *pb, AVCodecContext *avctx, unsigned 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_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, 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, int *pseq)

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

void ff_rm_reorder_sipr_data (uint8_t *buf, int sub_packet_h, int framesize)

Perform 4-bit block reordering for SIPR data.

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

static const AVCodecTag rm_codec_tags []

static const unsigned char sipr_swaps [38][2]

const unsigned char ff_sipr_subpk_size [4] = { 29, 19, 37, 20 }

AVInputFormat rm_demuxer

AVInputFormat rdt_demuxer

Define Documentation

#define RAW_PACKET_SIZE 1000

Definition at line 529 of file rmdec.c.

Referenced by rm_read_packet().

Function Documentation

RMStream* ff_rm_alloc_rmstream ( void )

Definition at line 128 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 135 of file rmdec.c.

Referenced by rdt_free_context(), 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	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 722 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 288 of file rmdec.c.

Referenced by rdt_load_mdpr(), and rm_read_header().

void ff_rm_reorder_sipr_data	(	uint8_t *	buf,
		int	sub_packet_h,
		int	framesize
	)

Perform 4-bit block reordering for SIPR data.

Todo:: This can be optimized, e.g. use memcpy() if data blocks are aligned

Definition at line 699 of file rmdec.c.

Referenced by ff_rm_parse_packet(), and matroska_parse_block().

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 813 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 512 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 98 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 84 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 681 of file rmdec.c.

Referenced by ff_rm_parse_packet().

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

Definition at line 599 of file rmdec.c.

Referenced by ff_rm_parse_packet().

static int rm_probe ( AVProbeData * p ) [static]

Definition at line 901 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 140 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 891 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 914 of file rmdec.c.

static int rm_read_extradata	(	ByteIOContext *	pb,
		AVCodecContext *	avctx,
		unsigned	size
	)			`[static]`

Definition at line 103 of file rmdec.c.

Referenced by ff_rm_read_mdpr_codecdata(), and rm_read_audio_stream_info().

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

Definition at line 406 of file rmdec.c.

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

Definition at line 393 of file rmdec.c.

Referenced by rm_read_header().

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 351 of file rmdec.c.

Referenced by rm_read_header().

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

Definition at line 117 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 839 of file rmdec.c.

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

Definition at line 531 of file rmdec.c.

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

Variable Documentation

const unsigned char ff_sipr_subpk_size[4] = { 29, 19, 37, 20 }

Definition at line 82 of file rmdec.c.

Referenced by matroska_read_header(), and rm_read_audio_stream_info().

AVInputFormat rdt_demuxer

Initial value:

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

Definition at line 969 of file rmdec.c.

Referenced by rdt_new_context().

const AVCodecTag rm_codec_tags[] [static]

Initial value:

 {
    { CODEC_ID_RV10,   MKTAG('R','V','1','0') },
    { CODEC_ID_RV20,   MKTAG('R','V','2','0') },
    { CODEC_ID_RV20,   MKTAG('R','V','T','R') },
    { CODEC_ID_RV30,   MKTAG('R','V','3','0') },
    { CODEC_ID_RV40,   MKTAG('R','V','4','0') },
    { CODEC_ID_AC3,    MKTAG('d','n','e','t') },
    { CODEC_ID_RA_144, MKTAG('l','p','c','J') },
    { CODEC_ID_RA_288, MKTAG('2','8','_','8') },
    { CODEC_ID_COOK,   MKTAG('c','o','o','k') },
    { CODEC_ID_ATRAC3, MKTAG('a','t','r','c') },
    { CODEC_ID_SIPR,   MKTAG('s','i','p','r') },
    { CODEC_ID_AAC,    MKTAG('r','a','a','c') },
    { CODEC_ID_AAC,    MKTAG('r','a','c','p') },
    { CODEC_ID_NONE },
}

Definition at line 52 of file rmdec.c.

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 957 of file rmdec.c.

const unsigned char sipr_swaps[38][2] [static]

Initial value:

 {
    {  0, 63 }, {  1, 22 }, {  2, 44 }, {  3, 90 },
    {  5, 81 }, {  7, 31 }, {  8, 86 }, {  9, 58 },
    { 10, 36 }, { 12, 68 }, { 13, 39 }, { 14, 73 },
    { 15, 53 }, { 16, 69 }, { 17, 57 }, { 19, 88 },
    { 20, 34 }, { 21, 71 }, { 24, 46 }, { 25, 94 },
    { 26, 54 }, { 28, 75 }, { 29, 50 }, { 32, 70 },
    { 33, 92 }, { 35, 74 }, { 38, 85 }, { 40, 56 },
    { 42, 87 }, { 43, 65 }, { 45, 59 }, { 48, 79 },
    { 49, 93 }, { 51, 89 }, { 55, 95 }, { 61, 76 },
    { 67, 83 }, { 77, 80 }
}

Definition at line 69 of file rmdec.c.

Referenced by ff_rm_reorder_sipr_data().


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 int	rm_read_extradata (ByteIOContext pb, AVCodecContext avctx, unsigned 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_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, 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, int pseq)
static void	rm_ac3_swap_bytes (AVStream st, AVPacket pkt)
void	ff_rm_reorder_sipr_data (uint8_t *buf, int sub_packet_h, int framesize)
	Perform 4-bit block reordering for SIPR data.
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
static const AVCodecTag	rm_codec_tags []
static const unsigned char	sipr_swaps [38][2]
const unsigned char	ff_sipr_subpk_size [4] = { 29, 19, 37, 20 }
AVInputFormat	rm_demuxer
AVInputFormat	rdt_demuxer