libavformat/udp.c File Reference

UDP protocol. More...

#include "avformat.h"
#include "avio_internal.h"
#include "libavutil/parseutils.h"
#include "libavutil/fifo.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/avstring.h"
#include <unistd.h>
#include "internal.h"
#include "network.h"
#include "os_support.h"
#include "url.h"
#include <sys/time.h>

Go to the source code of this file.

Data Structures
struct	UDPContext
Defines
#define	_BSD_SOURCE
#define	IPV6_ADD_MEMBERSHIP   IPV6_JOIN_GROUP
#define	IPV6_DROP_MEMBERSHIP   IPV6_LEAVE_GROUP
#define	UDP_TX_BUF_SIZE   32768
#define	UDP_MAX_PKT_SIZE   65536
Functions
static int	udp_set_multicast_ttl (int sockfd, int mcastTTL, struct sockaddr *addr)
static int	udp_join_multicast_group (int sockfd, struct sockaddr *addr)
static int	udp_leave_multicast_group (int sockfd, struct sockaddr *addr)
static struct addrinfo *	udp_resolve_host (const char *hostname, int port, int type, int family, int flags)
static int	udp_set_url (struct sockaddr_storage *addr, const char *hostname, int port)
static int	udp_socket_create (UDPContext *s, struct sockaddr_storage *addr, int *addr_len, const char *localaddr)
static int	udp_port (struct sockaddr_storage *addr, int addr_len)
int	ff_udp_set_remote_url (URLContext *h, const char *uri)
	If no filename is given to av_open_input_file because you want to get the local port first, then you must call this function to set the remote server address.
int	ff_udp_get_local_port (URLContext *h)
	Return the local port used by the UDP connection.
static int	udp_get_file_handle (URLContext *h)
	Return the udp file handle for select() usage to wait for several RTP streams at the same time.
static int	udp_open (URLContext *h, const char *uri, int flags)
static int	udp_read (URLContext *h, uint8_t *buf, int size)
static int	udp_write (URLContext *h, const uint8_t *buf, int size)
static int	udp_close (URLContext *h)
Variables
URLProtocol	ff_udp_protocol

---

Detailed Description

UDP protocol.

Definition in file udp.c.

---

Define Documentation

#define _BSD_SOURCE

Definition at line 27 of file udp.c.

#define IPV6_ADD_MEMBERSHIP   IPV6_JOIN_GROUP

Definition at line 48 of file udp.c.

Referenced by udp_join_multicast_group().

#define IPV6_DROP_MEMBERSHIP   IPV6_LEAVE_GROUP

Definition at line 49 of file udp.c.

Referenced by udp_leave_multicast_group().

#define UDP_MAX_PKT_SIZE   65536

Definition at line 53 of file udp.c.

Referenced by udp_open().

#define UDP_TX_BUF_SIZE   32768

Definition at line 52 of file udp.c.

Referenced by udp_open().

---

Function Documentation

int ff_udp_get_local_port

(

URLContext *

h

)

Return the local port used by the UDP connection.

Parameters:

h

media file context

Returns:

the local port number

Definition at line 307 of file udp.c.

Referenced by ff_rtp_get_local_rtcp_port(), ff_rtp_get_local_rtp_port(), and rtp_open().

int ff_udp_set_remote_url	(	URLContext *	h,
		const char *	uri
	)

If no filename is given to av_open_input_file because you want to get the local port first, then you must call this function to set the remote server address.

url syntax: udp://host:port[?option=val...] option: 'ttl=n' : set the ttl value (for multicast only) 'localport=n' : set the local port 'pkt_size=n' : set max packet size 'reuse=1' : enable reusing the socket 'overrun_nonfatal=1': survive in case of circular buffer overrun

Parameters:

	h	media file context
	uri	of the remote server

Returns:

zero if no error.

Definition at line 268 of file udp.c.

Referenced by ff_rtp_set_remote_url(), and udp_open().

static int udp_close

(

URLContext *

h

)

[static]

Definition at line 646 of file udp.c.

static int udp_get_file_handle

(

URLContext *

h

)

[static]

Return the udp file handle for select() usage to wait for several RTP streams at the same time.

Parameters:

h

media file context

Definition at line 318 of file udp.c.

static int udp_join_multicast_group	(	int	sockfd,
		struct sockaddr *	addr
	)			[static]

Definition at line 103 of file udp.c.

Referenced by udp_open().

static int udp_leave_multicast_group	(	int	sockfd,
		struct sockaddr *	addr
	)			[static]

Definition at line 132 of file udp.c.

Referenced by udp_close().

static int udp_open	(	URLContext *	h,
		const char *	uri,
		int	flags
	)			[static]

Definition at line 381 of file udp.c.

static int udp_port	(	struct sockaddr_storage *	addr,
		int	addr_len
	)			[static]

Definition at line 239 of file udp.c.

Referenced by udp_open().

static int udp_read	(	URLContext *	h,
		uint8_t *	buf,
		int	size
	)			[static]

Definition at line 568 of file udp.c.

static struct addrinfo* udp_resolve_host	(	const char *	hostname,
		int	port,
		int	type,
		int	family,
		int	flags
	)			[static, read]

Definition at line 161 of file udp.c.

Referenced by udp_set_url(), and udp_socket_create().

static int udp_set_multicast_ttl	(	int	sockfd,
		int	mcastTTL,
		struct sockaddr *	addr
	)			[static]

Definition at line 81 of file udp.c.

Referenced by udp_open().

static int udp_set_url	(	struct sockaddr_storage *	addr,
		const char *	hostname,
		int	port
	)			[static]

Definition at line 187 of file udp.c.

Referenced by ff_udp_set_remote_url().

static int udp_socket_create	(	UDPContext *	s,
		struct sockaddr_storage *	addr,
		int *	addr_len,
		const char *	localaddr
	)			[static]

Definition at line 202 of file udp.c.

Referenced by udp_open().

static int udp_write	(	URLContext *	h,
		const uint8_t *	buf,
		int	size
	)			[static]

Definition at line 625 of file udp.c.

---

Variable Documentation

URLProtocol ff_udp_protocol

Initial value:

 {
    .name                = "udp",
    .url_open            = udp_open,
    .url_read            = udp_read,
    .url_write           = udp_write,
    .url_close           = udp_close,
    .url_get_file_handle = udp_get_file_handle,
    .priv_data_size      = sizeof(UDPContext),
    .flags               = URL_PROTOCOL_FLAG_NETWORK,
}

Definition at line 669 of file udp.c.