libavformat/rtpdec.c File Reference

#include "libavcodec/get_bits.h"
#include "avformat.h"
#include "mpegts.h"
#include "url.h"
#include <unistd.h>
#include <strings.h>
#include "network.h"
#include "rtpdec.h"
#include "rtpdec_formats.h"

Go to the source code of this file.

Defines

#define RTP_SEQ_MOD (1<<16)

Functions

void ff_register_dynamic_payload_handler (RTPDynamicProtocolHandler *handler)

void av_register_rtp_dynamic_payload_handlers (void)

RTPDynamicProtocolHandler * ff_rtp_handler_find_by_name (const char *name, enum AVMediaType codec_type)

RTPDynamicProtocolHandler * ff_rtp_handler_find_by_id (int id, enum AVMediaType codec_type)

static int rtcp_parse_packet (RTPDemuxContext *s, const unsigned char *buf, int len)

static void rtp_init_statistics (RTPStatistics *s, uint16_t base_sequence)

called on parse open packet

static void rtp_init_sequence (RTPStatistics *s, uint16_t seq)

called whenever there is a large jump in sequence numbers, or when they get out of probation.

static int rtp_valid_packet_in_sequence (RTPStatistics *s, uint16_t seq)

returns 1 if we should handle this packet.

int rtp_check_and_send_back_rr (RTPDemuxContext *s, int count)

some rtp servers assume client is dead if they don't hear from them.

void rtp_send_punch_packets (URLContext *rtp_handle)

Send a dummy packet on both port pairs to set up the connection state in potential NAT routers, so that we're able to receive packets.

RTPDemuxContext * rtp_parse_open (AVFormatContext *s1, AVStream *st, URLContext *rtpc, int payload_type, int queue_size)

open a new RTP parse context for stream 'st'.

void rtp_parse_set_dynamic_protocol (RTPDemuxContext *s, PayloadContext *ctx, RTPDynamicProtocolHandler *handler)

static void finalize_packet (RTPDemuxContext *s, AVPacket *pkt, uint32_t timestamp)

This was the second switch in rtp_parse packet.

static int rtp_parse_packet_internal (RTPDemuxContext *s, AVPacket *pkt, const uint8_t *buf, int len)

void ff_rtp_reset_packet_queue (RTPDemuxContext *s)

static void enqueue_packet (RTPDemuxContext *s, uint8_t *buf, int len)

static int has_next_packet (RTPDemuxContext *s)

int64_t ff_rtp_queued_packet_time (RTPDemuxContext *s)

static int rtp_parse_queued_packet (RTPDemuxContext *s, AVPacket *pkt)

static int rtp_parse_one_packet (RTPDemuxContext *s, AVPacket *pkt, uint8_t **bufptr, int len)

int rtp_parse_packet (RTPDemuxContext *s, AVPacket *pkt, uint8_t **bufptr, int len)

Parse an RTP or RTCP packet directly sent as a buffer.

void rtp_parse_close (RTPDemuxContext *s)

int ff_parse_fmtp (AVStream *stream, PayloadContext *data, const char *p, int(*parse_fmtp)(AVStream *stream, PayloadContext *data, char *attr, char *value))

Variables

static RTPDynamicProtocolHandler ff_realmedia_mp3_dynamic_handler

static RTPDynamicProtocolHandler * RTPFirstDynamicPayloadHandler = NULL

Define Documentation

#define RTP_SEQ_MOD (1<<16)

Definition at line 149 of file rtpdec.c.

Referenced by rtp_init_sequence(), and rtp_valid_packet_in_sequence().

Function Documentation

void av_register_rtp_dynamic_payload_handlers ( void )

Definition at line 60 of file rtpdec.c.

Referenced by av_register_all().

static void enqueue_packet	(	RTPDemuxContext *	s,
		uint8_t *	buf,
		int	len
	)			`[static]`

Definition at line 599 of file rtpdec.c.

Referenced by rtp_parse_one_packet().

int ff_parse_fmtp	(	AVStream *	stream,
		PayloadContext *	data,
		const char *	p,
		int()(AVStream stream, PayloadContext data, char attr, char *value)	parse_fmtp
	)

Definition at line 764 of file rtpdec.c.

Referenced by amr_parse_sdp_line(), latm_parse_sdp_line(), parse_h264_sdp_line(), parse_sdp_line(), and xiph_parse_sdp_line().

void ff_register_dynamic_payload_handler ( RTPDynamicProtocolHandler * handler )

Definition at line 54 of file rtpdec.c.

Referenced by av_register_rdt_dynamic_payload_handlers(), and av_register_rtp_dynamic_payload_handlers().

RTPDynamicProtocolHandler* ff_rtp_handler_find_by_id	(	int	id,
		enum AVMediaType	codec_type
	)

Definition at line 104 of file rtpdec.c.

RTPDynamicProtocolHandler* ff_rtp_handler_find_by_name	(	const char *	name,
		enum AVMediaType	codec_type
	)

Definition at line 92 of file rtpdec.c.

int64_t ff_rtp_queued_packet_time ( RTPDemuxContext * s )

Definition at line 633 of file rtpdec.c.

void ff_rtp_reset_packet_queue ( RTPDemuxContext * s )

Definition at line 586 of file rtpdec.c.

Referenced by rtp_parse_close(), and rtsp_read_play().

static void finalize_packet	(	RTPDemuxContext *	s,
		AVPacket *	pkt,
		uint32_t	timestamp
	)			`[static]`

This was the second switch in rtp_parse packet.

Normalizes time, if required, sets stream_index, etc.

Definition at line 440 of file rtpdec.c.

Referenced by rtp_parse_one_packet(), and rtp_parse_packet_internal().

static int has_next_packet ( RTPDemuxContext * s ) [static]

Definition at line 628 of file rtpdec.c.

Referenced by rtp_parse_packet(), and rtp_parse_queued_packet().

static int rtcp_parse_packet	(	RTPDemuxContext *	s,
		const unsigned char *	buf,
		int	len
	)			`[static]`

Definition at line 116 of file rtpdec.c.

Referenced by rtp_parse_one_packet().

int rtp_check_and_send_back_rr	(	RTPDemuxContext *	s,
		int	count
	)

some rtp servers assume client is dead if they don't hear from them.

.. so we send a Receiver Report to the provided ByteIO context (we don't have access to the rtcp handle from here)

Definition at line 241 of file rtpdec.c.

static void rtp_init_sequence	(	RTPStatistics *	s,
		uint16_t	seq
	)			`[static]`

called whenever there is a large jump in sequence numbers, or when they get out of probation.

..

Definition at line 164 of file rtpdec.c.

Referenced by rtp_valid_packet_in_sequence().

static void rtp_init_statistics	(	RTPStatistics *	s,
		uint16_t	base_sequence
	)			`[static]`

called on parse open packet

Definition at line 154 of file rtpdec.c.

Referenced by rtp_parse_open().

void rtp_parse_close ( RTPDemuxContext * s )

Definition at line 755 of file rtpdec.c.

Referenced by ff_rtsp_undo_setup().

static int rtp_parse_one_packet	(	RTPDemuxContext *	s,
		AVPacket *	pkt,
		uint8_t **	bufptr,
		int	len
	)			`[static]`

Definition at line 660 of file rtpdec.c.

Referenced by rtp_parse_packet().

RTPDemuxContext* rtp_parse_open	(	AVFormatContext *	s1,
		AVStream *	st,
		URLContext *	rtpc,
		int	payload_type,
		int	queue_size
	)

open a new RTP parse context for stream 'st'.

'st' can be NULL for MPEG2TS streams to indicate that they should be demuxed inside the rtp demux (otherwise CODEC_ID_MPEG2TS packets are returned)

Definition at line 382 of file rtpdec.c.

Referenced by rtsp_open_transport_ctx().

int rtp_parse_packet	(	RTPDemuxContext *	s,
		AVPacket *	pkt,
		uint8_t **	bufptr,
		int	len
	)

Parse an RTP or RTCP packet directly sent as a buffer.

Parameters:

	s	RTP parse context.
	pkt	returned packet
	bufptr	pointer to the input buffer or NULL to read the next packets
	len	buffer len

Returns:: 0 if a packet is returned, 1 if a packet is returned and more can follow (use buf as NULL to read the next). -1 if no packet (error or no more packet).

Definition at line 745 of file rtpdec.c.

static int rtp_parse_packet_internal	(	RTPDemuxContext *	s,
		AVPacket *	pkt,
		const uint8_t *	buf,
		int	len
	)			`[static]`

Definition at line 463 of file rtpdec.c.

Referenced by rtp_parse_one_packet(), and rtp_parse_queued_packet().

static int rtp_parse_queued_packet	(	RTPDemuxContext *	s,
		AVPacket *	pkt
	)			`[static]`

Definition at line 638 of file rtpdec.c.

Referenced by rtp_parse_one_packet(), and rtp_parse_packet().

void rtp_parse_set_dynamic_protocol	(	RTPDemuxContext *	s,
		PayloadContext *	ctx,
		RTPDynamicProtocolHandler *	handler
	)

Definition at line 430 of file rtpdec.c.

Referenced by rtsp_open_transport_ctx().

void rtp_send_punch_packets ( URLContext * rtp_handle )

Send a dummy packet on both port pairs to set up the connection state in potential NAT routers, so that we're able to receive packets.

Note, this only works if the NAT router doesn't remap ports. This isn't a standardized procedure, but it works in many cases in practice.

The same routine is used with RDT too, even if RDT doesn't use normal RTP packets otherwise.

Definition at line 338 of file rtpdec.c.

static int rtp_valid_packet_in_sequence	(	RTPStatistics *	s,
		uint16_t	seq
	)			`[static]`

returns 1 if we should handle this packet.

Definition at line 180 of file rtpdec.c.

Referenced by rtp_parse_packet_internal().

Variable Documentation

RTPDynamicProtocolHandler ff_realmedia_mp3_dynamic_handler [static]

Initial value:

 {
    .enc_name           = "X-MP3-draft-00",
    .codec_type         = AVMEDIA_TYPE_AUDIO,
    .codec_id           = CODEC_ID_MP3ADU,
}

Definition at line 45 of file rtpdec.c.

RTPDynamicProtocolHandler* RTPFirstDynamicPayloadHandler = NULL [static]

Definition at line 52 of file rtpdec.c.


Defines
#define	RTP_SEQ_MOD (1<<16)
Functions
void	ff_register_dynamic_payload_handler (RTPDynamicProtocolHandler *handler)
void	av_register_rtp_dynamic_payload_handlers (void)
RTPDynamicProtocolHandler *	ff_rtp_handler_find_by_name (const char *name, enum AVMediaType codec_type)
RTPDynamicProtocolHandler *	ff_rtp_handler_find_by_id (int id, enum AVMediaType codec_type)
static int	rtcp_parse_packet (RTPDemuxContext s, const unsigned char buf, int len)
static void	rtp_init_statistics (RTPStatistics *s, uint16_t base_sequence)
	called on parse open packet
static void	rtp_init_sequence (RTPStatistics *s, uint16_t seq)
	called whenever there is a large jump in sequence numbers, or when they get out of probation.
static int	rtp_valid_packet_in_sequence (RTPStatistics *s, uint16_t seq)
	returns 1 if we should handle this packet.
int	rtp_check_and_send_back_rr (RTPDemuxContext *s, int count)
	some rtp servers assume client is dead if they don't hear from them.
void	rtp_send_punch_packets (URLContext *rtp_handle)
	Send a dummy packet on both port pairs to set up the connection state in potential NAT routers, so that we're able to receive packets.
RTPDemuxContext *	rtp_parse_open (AVFormatContext s1, AVStream st, URLContext *rtpc, int payload_type, int queue_size)
	open a new RTP parse context for stream 'st'.
void	rtp_parse_set_dynamic_protocol (RTPDemuxContext s, PayloadContext ctx, RTPDynamicProtocolHandler *handler)
static void	finalize_packet (RTPDemuxContext s, AVPacket pkt, uint32_t timestamp)
	This was the second switch in rtp_parse packet.
static int	rtp_parse_packet_internal (RTPDemuxContext s, AVPacket pkt, const uint8_t *buf, int len)
void	ff_rtp_reset_packet_queue (RTPDemuxContext *s)
static void	enqueue_packet (RTPDemuxContext s, uint8_t buf, int len)
static int	has_next_packet (RTPDemuxContext *s)
int64_t	ff_rtp_queued_packet_time (RTPDemuxContext *s)
static int	rtp_parse_queued_packet (RTPDemuxContext s, AVPacket pkt)
static int	rtp_parse_one_packet (RTPDemuxContext s, AVPacket pkt, uint8_t **bufptr, int len)
int	rtp_parse_packet (RTPDemuxContext s, AVPacket pkt, uint8_t **bufptr, int len)
	Parse an RTP or RTCP packet directly sent as a buffer.
void	rtp_parse_close (RTPDemuxContext *s)
int	ff_parse_fmtp (AVStream stream, PayloadContext data, const char p, int(parse_fmtp)(AVStream stream, PayloadContext data, char attr, char value))
Variables
static RTPDynamicProtocolHandler	ff_realmedia_mp3_dynamic_handler
static RTPDynamicProtocolHandler *	RTPFirstDynamicPayloadHandler = NULL