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 "libavutil/opt.h"
#include "libavutil/log.h"
#include "internal.h"
#include "network.h"
#include "os_support.h"
#include "url.h"

Data Structures
struct	UDPContext

Macros
#define	_BSD_SOURCE /* Needed for using struct ip_mreq with recent glibc */

#define	HAVE_PTHREAD_CANCEL 0

#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

#define	OFFSET(x) offsetof(UDPContext, x)

#define	D AV_OPT_FLAG_DECODING_PARAM

#define	E AV_OPT_FLAG_ENCODING_PARAM

Functions
static void	log_net_error (void ctx, int level, const char prefix)

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_multicast_sources (int sockfd, struct sockaddr addr, int addr_len, char *sources, int nb_sources, int include)

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, socklen_t 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
static const AVOption	options []

static const AVClass	udp_context_class

URLProtocol	ff_udp_protocol

Detailed Description

UDP protocol.

Definition in file udp.c.

Macro Definition Documentation

#define _BSD_SOURCE /* Needed for using struct ip_mreq with recent glibc */

Definition at line 27 of file udp.c.

#define HAVE_PTHREAD_CANCEL 0

Definition at line 47 of file udp.c.

Referenced by udp_open().

#define IPV6_ADD_MEMBERSHIP IPV6_JOIN_GROUP

Definition at line 51 of file udp.c.

Referenced by udp_join_multicast_group().

#define IPV6_DROP_MEMBERSHIP IPV6_LEAVE_GROUP

Definition at line 52 of file udp.c.

Referenced by udp_leave_multicast_group().

#define UDP_TX_BUF_SIZE 32768

Definition at line 55 of file udp.c.

Referenced by udp_open().

#define UDP_MAX_PKT_SIZE 65536

Definition at line 56 of file udp.c.

Referenced by udp_open().

#define OFFSET ( x ) offsetof(UDPContext, x)

Definition at line 88 of file udp.c.

#define D AV_OPT_FLAG_DECODING_PARAM

Definition at line 89 of file udp.c.

#define E AV_OPT_FLAG_ENCODING_PARAM

Definition at line 90 of file udp.c.

Function Documentation

static void log_net_error	(	void *	ctx,
		int	level,
		const char *	prefix
	)

static

Definition at line 113 of file udp.c.

Referenced by ff_udp_set_remote_url(), udp_join_multicast_group(), udp_leave_multicast_group(), udp_open(), udp_set_multicast_sources(), udp_set_multicast_ttl(), and udp_socket_create().

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

static

Definition at line 120 of file udp.c.

Referenced by udp_open().

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

static

Definition at line 142 of file udp.c.

Referenced by udp_open().

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

static

Definition at line 171 of file udp.c.

Referenced by udp_close().

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

staticread

Definition at line 200 of file udp.c.

Referenced by udp_set_multicast_sources(), udp_set_url(), and udp_socket_create().

static int udp_set_multicast_sources	(	int	sockfd,
		struct sockaddr *	addr,
		int	addr_len,
		char **	sources,
		int	nb_sources,
		int	include
	)

static

Definition at line 226 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 299 of file udp.c.

Referenced by ff_udp_set_remote_url().

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

static

Definition at line 314 of file udp.c.

Referenced by udp_open().

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

static

Definition at line 351 of file udp.c.

Referenced by udp_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 381 of file udp.c.

Referenced by ff_rtp_set_remote_url(), and udp_open().

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 420 of file udp.c.

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

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 431 of file udp.c.

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

static

Definition at line 498 of file udp.c.

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

static

Definition at line 734 of file udp.c.

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

static

Definition at line 793 of file udp.c.

static int udp_close ( URLContext * h )

static

Definition at line 814 of file udp.c.

Variable Documentation

const AVOption options[]

static

Initial value:

= {
{"buffer_size", "Socket buffer size in bytes", OFFSET(buffer_size), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, D|E },
{"localport", "Set local port to bind to", OFFSET(local_port), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, D|E },
{"localaddr", "Choose local IP address", OFFSET(local_addr), AV_OPT_TYPE_STRING, {.str = ""}, 0, 0, D|E },
{"pkt_size", "Set size of UDP packets", OFFSET(packet_size), AV_OPT_TYPE_INT, {.i64 = 1472}, 0, INT_MAX, D|E },
{"reuse", "Explicitly allow or disallow reusing UDP sockets", OFFSET(reuse_socket), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, D|E },
{"ttl", "Set the time to live value (for multicast only)", OFFSET(ttl), AV_OPT_TYPE_INT, {.i64 = 16}, 0, INT_MAX, E },
{"connect", "Should connect() be called on socket", OFFSET(is_connected), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, D|E },
{"fifo_size", "Set the UDP receiving circular buffer size, expressed as a number of packets with size of 188 bytes", OFFSET(circular_buffer_size), AV_OPT_TYPE_INT, {.i64 = 7*4096}, 0, INT_MAX, D },
{"overrun_nonfatal", "Survive in case of UDP receiving circular buffer overrun", OFFSET(overrun_nonfatal), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, D },
{"timeout", "In read mode: if no data arrived in more than this time interval, raise error", OFFSET(timeout), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, D },
{NULL}
}

Definition at line 91 of file udp.c.

const AVClass udp_context_class

static

Initial value:

= {
    .class_name     = "udp",
    .item_name      = av_default_item_name,
    .option         = options,
    .version        = LIBAVUTIL_VERSION_INT,
}

Definition at line 106 of file udp.c.

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),
    .priv_data_class     = &udp_context_class,
    .flags               = URL_PROTOCOL_FLAG_NETWORK,
}

Definition at line 836 of file udp.c.

Data Structures

Macros

Functions

Variables

Detailed Description

Macro Definition Documentation

Function Documentation

Variable Documentation