libavformat/rtpdec.c File Reference

#include "libavutil/mathematics.h"
#include "libavutil/avstring.h"
#include "libavcodec/get_bits.h"
#include "avformat.h"
#include "mpegts.h"
#include "url.h"
#include <unistd.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 ff_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 ff_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 * ff_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 ff_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 ff_rtp_parse_packet (RTPDemuxContext *s, AVPacket *pkt, uint8_t **bufptr, int len)

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

void ff_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 151 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 61 of file rtpdec.c.

Referenced by av_register_all().

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

Definition at line 596 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 761 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 55 of file rtpdec.c.

Referenced by av_register_rdt_dynamic_payload_handlers(), and av_register_rtp_dynamic_payload_handlers().

int ff_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 227 of file rtpdec.c.

RTPDynamicProtocolHandler* ff_rtp_handler_find_by_id	(	int	id,
		enum AVMediaType	codec_type
	)

Definition at line 106 of file rtpdec.c.

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

Definition at line 94 of file rtpdec.c.

void ff_rtp_parse_close ( RTPDemuxContext * s )

Definition at line 752 of file rtpdec.c.

Referenced by ff_rtsp_undo_setup().

RTPDemuxContext* ff_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 368 of file rtpdec.c.

Referenced by rtsp_open_transport_ctx().

int ff_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 742 of file rtpdec.c.

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

Definition at line 419 of file rtpdec.c.

Referenced by rtsp_open_transport_ctx().

int64_t ff_rtp_queued_packet_time ( RTPDemuxContext * s )

Definition at line 630 of file rtpdec.c.

void ff_rtp_reset_packet_queue ( RTPDemuxContext * s )

Definition at line 583 of file rtpdec.c.

Referenced by ff_rtp_parse_close(), and rtsp_read_play().

void ff_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 324 of file rtpdec.c.

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 429 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 625 of file rtpdec.c.

Referenced by ff_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 118 of file rtpdec.c.

Referenced by rtp_parse_one_packet().

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 166 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 156 of file rtpdec.c.

Referenced by ff_rtp_parse_open().

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

Definition at line 657 of file rtpdec.c.

Referenced by ff_rtp_parse_packet().

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

Definition at line 460 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 635 of file rtpdec.c.

Referenced by ff_rtp_parse_packet(), and rtp_parse_one_packet().

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

returns 1 if we should handle this packet.

Definition at line 182 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 46 of file rtpdec.c.

RTPDynamicProtocolHandler* RTPFirstDynamicPayloadHandler = NULL [static]

Definition at line 53 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	ff_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	ff_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 *	ff_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	ff_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	ff_rtp_parse_packet (RTPDemuxContext s, AVPacket pkt, uint8_t **bufptr, int len)
	Parse an RTP or RTCP packet directly sent as a buffer.
void	ff_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