2002-07-04 12:42:57 +02:00
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/*
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* RTP network protocol
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2009-01-19 16:46:40 +01:00
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* Copyright (c) 2002 Fabrice Bellard
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2002-07-04 12:42:57 +02:00
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*
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2006-10-07 17:30:46 +02:00
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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2002-07-04 12:42:57 +02:00
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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2006-10-07 17:30:46 +02:00
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* version 2.1 of the License, or (at your option) any later version.
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2002-07-04 12:42:57 +02:00
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*
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2006-10-07 17:30:46 +02:00
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* FFmpeg is distributed in the hope that it will be useful,
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2002-07-04 12:42:57 +02:00
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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2006-10-07 17:30:46 +02:00
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* License along with FFmpeg; if not, write to the Free Software
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2006-01-12 23:43:26 +01:00
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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2002-07-04 12:42:57 +02:00
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*/
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2008-04-16 00:22:49 +02:00
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/**
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2010-04-20 16:45:34 +02:00
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* @file
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2008-04-16 00:22:49 +02:00
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* RTP protocol
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*/
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2008-05-09 13:56:36 +02:00
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#include "libavutil/avstring.h"
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2002-07-04 12:42:57 +02:00
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#include "avformat.h"
|
2010-02-28 04:59:15 +01:00
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#include "rtpdec.h"
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2002-07-04 12:42:57 +02:00
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#include <unistd.h>
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2002-07-24 19:38:20 +02:00
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#include <stdarg.h>
|
2010-03-15 00:59:48 +01:00
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#include "internal.h"
|
2007-02-04 18:05:44 +01:00
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#include "network.h"
|
2007-11-27 12:42:09 +01:00
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#include "os_support.h"
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2002-07-04 12:42:57 +02:00
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#include <fcntl.h>
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2009-01-14 00:44:16 +01:00
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#if HAVE_SYS_SELECT_H
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2008-08-12 23:02:37 +02:00
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#include <sys/select.h>
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2008-08-14 16:29:18 +02:00
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#endif
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2010-03-10 08:43:56 +01:00
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#include <sys/time.h>
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2002-07-04 12:42:57 +02:00
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#define RTP_TX_BUF_SIZE (64 * 1024)
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#define RTP_RX_BUF_SIZE (128 * 1024)
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typedef struct RTPContext {
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URLContext *rtp_hd, *rtcp_hd;
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int rtp_fd, rtcp_fd;
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} RTPContext;
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/**
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* If no filename is given to av_open_input_file because you want to
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* get the local port first, then you must call this function to set
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* the remote server address.
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*
|
2010-07-02 12:49:29 +02:00
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* @param h media file context
|
2002-07-04 12:42:57 +02:00
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* @param uri of the remote server
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* @return zero if no error.
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*/
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2008-04-16 00:22:49 +02:00
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2002-07-04 12:42:57 +02:00
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int rtp_set_remote_url(URLContext *h, const char *uri)
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|
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{
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RTPContext *s = h->priv_data;
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char hostname[256];
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int port;
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2002-07-24 19:38:20 +02:00
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2002-07-04 12:42:57 +02:00
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char buf[1024];
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char path[1024];
|
2005-12-17 19:14:38 +01:00
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|
2010-06-27 16:16:46 +02:00
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|
av_url_split(NULL, 0, NULL, 0, hostname, sizeof(hostname), &port,
|
2010-03-08 10:05:03 +01:00
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path, sizeof(path), uri);
|
2002-07-04 12:42:57 +02:00
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|
2010-03-05 23:35:21 +01:00
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ff_url_join(buf, sizeof(buf), "udp", NULL, hostname, port, "%s", path);
|
2002-07-04 12:42:57 +02:00
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|
udp_set_remote_url(s->rtp_hd, buf);
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|
2010-03-05 23:35:21 +01:00
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|
ff_url_join(buf, sizeof(buf), "udp", NULL, hostname, port + 1, "%s", path);
|
2002-07-04 12:42:57 +02:00
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|
udp_set_remote_url(s->rtcp_hd, buf);
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return 0;
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}
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|
2008-04-16 00:22:49 +02:00
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/**
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* add option to url of the form:
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* "http://host:port/path?option1=val1&option2=val2...
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*/
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|
2003-02-10 10:35:32 +01:00
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static void url_add_option(char *buf, int buf_size, const char *fmt, ...)
|
2002-07-24 19:38:20 +02:00
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|
{
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|
char buf1[1024];
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|
|
va_list ap;
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va_start(ap, fmt);
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|
|
if (strchr(buf, '?'))
|
2007-06-24 13:27:12 +02:00
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|
av_strlcat(buf, "&", buf_size);
|
2002-07-24 19:38:20 +02:00
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else
|
2007-06-24 13:27:12 +02:00
|
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|
av_strlcat(buf, "?", buf_size);
|
2002-07-24 19:38:20 +02:00
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vsnprintf(buf1, sizeof(buf1), fmt, ap);
|
2007-06-24 13:27:12 +02:00
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|
av_strlcat(buf, buf1, buf_size);
|
2002-07-24 19:38:20 +02:00
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va_end(ap);
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}
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|
2003-02-10 10:35:32 +01:00
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static void build_udp_url(char *buf, int buf_size,
|
2005-12-22 02:10:11 +01:00
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const char *hostname, int port,
|
2008-04-15 21:27:39 +02:00
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int local_port, int ttl,
|
2011-01-06 16:16:09 +01:00
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int max_packet_size, int connect)
|
2002-07-24 19:38:20 +02:00
|
|
|
{
|
2010-03-05 23:35:21 +01:00
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ff_url_join(buf, buf_size, "udp", NULL, hostname, port, NULL);
|
2002-07-24 19:38:20 +02:00
|
|
|
if (local_port >= 0)
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url_add_option(buf, buf_size, "localport=%d", local_port);
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|
if (ttl >= 0)
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|
url_add_option(buf, buf_size, "ttl=%d", ttl);
|
2008-04-15 21:27:39 +02:00
|
|
|
if (max_packet_size >=0)
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|
|
url_add_option(buf, buf_size, "pkt_size=%d", max_packet_size);
|
2011-01-06 16:16:09 +01:00
|
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|
if (connect)
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|
url_add_option(buf, buf_size, "connect=1");
|
2002-07-24 19:38:20 +02:00
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|
}
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|
2008-04-16 00:22:49 +02:00
|
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|
/**
|
2002-07-24 19:38:20 +02:00
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* url syntax: rtp://host:port[?option=val...]
|
2010-04-19 13:40:45 +02:00
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* option: 'ttl=n' : set the ttl value (for multicast only)
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* 'rtcpport=n' : set the remote rtcp port to n
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* 'localrtpport=n' : set the local rtp port to n
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* 'localrtcpport=n' : set the local rtcp port to n
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* 'pkt_size=n' : set max packet size
|
2011-01-06 16:16:09 +01:00
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|
* 'connect=0/1' : do a connect() on the UDP socket
|
2010-04-19 13:40:45 +02:00
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* deprecated option:
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* 'localport=n' : set the local port to n
|
2002-07-24 19:38:20 +02:00
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*
|
2010-04-19 13:40:45 +02:00
|
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* if rtcpport isn't set the rtcp port will be the rtp port + 1
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* if local rtp port isn't set any available port will be used for the local
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* rtp and rtcp ports
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* if the local rtcp port is not set it will be the local rtp port + 1
|
2002-07-24 19:38:20 +02:00
|
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*/
|
2008-04-16 00:22:49 +02:00
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|
2002-07-04 12:42:57 +02:00
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|
static int rtp_open(URLContext *h, const char *uri, int flags)
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|
|
|
{
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|
RTPContext *s;
|
2010-04-19 13:40:45 +02:00
|
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|
int rtp_port, rtcp_port,
|
2011-01-06 16:16:09 +01:00
|
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|
is_output, ttl, connect,
|
2010-04-19 13:40:45 +02:00
|
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|
local_rtp_port, local_rtcp_port, max_packet_size;
|
2002-07-04 12:42:57 +02:00
|
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|
char hostname[256];
|
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|
char buf[1024];
|
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|
char path[1024];
|
2002-07-24 19:38:20 +02:00
|
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|
const char *p;
|
2005-12-17 19:14:38 +01:00
|
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|
|
2002-07-04 12:42:57 +02:00
|
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|
is_output = (flags & URL_WRONLY);
|
|
|
|
|
|
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|
s = av_mallocz(sizeof(RTPContext));
|
|
|
|
if (!s)
|
2007-02-13 19:26:14 +01:00
|
|
|
return AVERROR(ENOMEM);
|
2002-07-04 12:42:57 +02:00
|
|
|
h->priv_data = s;
|
2005-12-17 19:14:38 +01:00
|
|
|
|
2010-06-27 16:16:46 +02:00
|
|
|
av_url_split(NULL, 0, NULL, 0, hostname, sizeof(hostname), &rtp_port,
|
2010-03-08 10:05:03 +01:00
|
|
|
path, sizeof(path), uri);
|
2002-07-24 19:38:20 +02:00
|
|
|
/* extract parameters */
|
|
|
|
ttl = -1;
|
2010-04-19 13:40:45 +02:00
|
|
|
rtcp_port = rtp_port+1;
|
|
|
|
local_rtp_port = -1;
|
|
|
|
local_rtcp_port = -1;
|
2008-04-15 21:27:39 +02:00
|
|
|
max_packet_size = -1;
|
2011-01-06 16:16:09 +01:00
|
|
|
connect = 0;
|
2008-04-15 21:27:39 +02:00
|
|
|
|
2002-07-24 19:38:20 +02:00
|
|
|
p = strchr(uri, '?');
|
|
|
|
if (p) {
|
|
|
|
if (find_info_tag(buf, sizeof(buf), "ttl", p)) {
|
|
|
|
ttl = strtol(buf, NULL, 10);
|
|
|
|
}
|
2010-04-19 13:40:45 +02:00
|
|
|
if (find_info_tag(buf, sizeof(buf), "rtcpport", p)) {
|
|
|
|
rtcp_port = strtol(buf, NULL, 10);
|
|
|
|
}
|
2002-07-24 19:38:20 +02:00
|
|
|
if (find_info_tag(buf, sizeof(buf), "localport", p)) {
|
2010-04-19 13:40:45 +02:00
|
|
|
local_rtp_port = strtol(buf, NULL, 10);
|
|
|
|
}
|
|
|
|
if (find_info_tag(buf, sizeof(buf), "localrtpport", p)) {
|
|
|
|
local_rtp_port = strtol(buf, NULL, 10);
|
|
|
|
}
|
|
|
|
if (find_info_tag(buf, sizeof(buf), "localrtcpport", p)) {
|
|
|
|
local_rtcp_port = strtol(buf, NULL, 10);
|
2002-07-24 19:38:20 +02:00
|
|
|
}
|
2008-04-15 21:27:39 +02:00
|
|
|
if (find_info_tag(buf, sizeof(buf), "pkt_size", p)) {
|
|
|
|
max_packet_size = strtol(buf, NULL, 10);
|
|
|
|
}
|
2011-01-06 16:16:09 +01:00
|
|
|
if (find_info_tag(buf, sizeof(buf), "connect", p)) {
|
|
|
|
connect = strtol(buf, NULL, 10);
|
|
|
|
}
|
2002-07-24 19:38:20 +02:00
|
|
|
}
|
2002-07-04 12:42:57 +02:00
|
|
|
|
2002-07-24 19:38:20 +02:00
|
|
|
build_udp_url(buf, sizeof(buf),
|
2011-01-06 16:16:09 +01:00
|
|
|
hostname, rtp_port, local_rtp_port, ttl, max_packet_size,
|
|
|
|
connect);
|
2002-07-04 12:42:57 +02:00
|
|
|
if (url_open(&s->rtp_hd, buf, flags) < 0)
|
|
|
|
goto fail;
|
2010-04-19 13:40:45 +02:00
|
|
|
if (local_rtp_port>=0 && local_rtcp_port<0)
|
|
|
|
local_rtcp_port = udp_get_local_port(s->rtp_hd) + 1;
|
2005-12-17 19:14:38 +01:00
|
|
|
|
2002-07-24 19:38:20 +02:00
|
|
|
build_udp_url(buf, sizeof(buf),
|
2011-01-06 16:16:09 +01:00
|
|
|
hostname, rtcp_port, local_rtcp_port, ttl, max_packet_size,
|
|
|
|
connect);
|
2002-07-04 12:42:57 +02:00
|
|
|
if (url_open(&s->rtcp_hd, buf, flags) < 0)
|
|
|
|
goto fail;
|
2005-12-17 19:14:38 +01:00
|
|
|
|
2002-07-04 12:42:57 +02:00
|
|
|
/* just to ease handle access. XXX: need to suppress direct handle
|
|
|
|
access */
|
2009-03-03 18:04:51 +01:00
|
|
|
s->rtp_fd = url_get_file_handle(s->rtp_hd);
|
|
|
|
s->rtcp_fd = url_get_file_handle(s->rtcp_hd);
|
2002-07-04 12:42:57 +02:00
|
|
|
|
2005-12-17 19:14:38 +01:00
|
|
|
h->max_packet_size = url_get_max_packet_size(s->rtp_hd);
|
2002-07-04 12:42:57 +02:00
|
|
|
h->is_streamed = 1;
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
fail:
|
|
|
|
if (s->rtp_hd)
|
|
|
|
url_close(s->rtp_hd);
|
|
|
|
if (s->rtcp_hd)
|
|
|
|
url_close(s->rtcp_hd);
|
|
|
|
av_free(s);
|
2007-07-19 17:23:32 +02:00
|
|
|
return AVERROR(EIO);
|
2002-07-04 12:42:57 +02:00
|
|
|
}
|
|
|
|
|
2003-02-11 17:35:48 +01:00
|
|
|
static int rtp_read(URLContext *h, uint8_t *buf, int size)
|
2002-07-04 12:42:57 +02:00
|
|
|
{
|
|
|
|
RTPContext *s = h->priv_data;
|
2010-09-27 18:10:23 +02:00
|
|
|
struct sockaddr_storage from;
|
2006-09-27 21:47:39 +02:00
|
|
|
socklen_t from_len;
|
|
|
|
int len, fd_max, n;
|
2002-07-04 12:42:57 +02:00
|
|
|
fd_set rfds;
|
2010-03-04 16:08:54 +01:00
|
|
|
struct timeval tv;
|
2002-07-04 12:42:57 +02:00
|
|
|
#if 0
|
|
|
|
for(;;) {
|
|
|
|
from_len = sizeof(from);
|
|
|
|
len = recvfrom (s->rtp_fd, buf, size, 0,
|
|
|
|
(struct sockaddr *)&from, &from_len);
|
|
|
|
if (len < 0) {
|
2007-04-27 02:35:54 +02:00
|
|
|
if (ff_neterrno() == FF_NETERROR(EAGAIN) ||
|
|
|
|
ff_neterrno() == FF_NETERROR(EINTR))
|
2002-07-04 12:42:57 +02:00
|
|
|
continue;
|
2007-07-19 17:23:32 +02:00
|
|
|
return AVERROR(EIO);
|
2002-07-04 12:42:57 +02:00
|
|
|
}
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
#else
|
|
|
|
for(;;) {
|
2010-03-04 16:08:54 +01:00
|
|
|
if (url_interrupt_cb())
|
|
|
|
return AVERROR(EINTR);
|
2002-07-04 12:42:57 +02:00
|
|
|
/* build fdset to listen to RTP and RTCP packets */
|
|
|
|
FD_ZERO(&rfds);
|
|
|
|
fd_max = s->rtp_fd;
|
|
|
|
FD_SET(s->rtp_fd, &rfds);
|
|
|
|
if (s->rtcp_fd > fd_max)
|
|
|
|
fd_max = s->rtcp_fd;
|
|
|
|
FD_SET(s->rtcp_fd, &rfds);
|
2010-03-04 16:08:54 +01:00
|
|
|
tv.tv_sec = 0;
|
|
|
|
tv.tv_usec = 100 * 1000;
|
|
|
|
n = select(fd_max + 1, &rfds, NULL, NULL, &tv);
|
2002-07-04 12:42:57 +02:00
|
|
|
if (n > 0) {
|
|
|
|
/* first try RTCP */
|
|
|
|
if (FD_ISSET(s->rtcp_fd, &rfds)) {
|
|
|
|
from_len = sizeof(from);
|
|
|
|
len = recvfrom (s->rtcp_fd, buf, size, 0,
|
|
|
|
(struct sockaddr *)&from, &from_len);
|
|
|
|
if (len < 0) {
|
2007-04-27 02:35:54 +02:00
|
|
|
if (ff_neterrno() == FF_NETERROR(EAGAIN) ||
|
|
|
|
ff_neterrno() == FF_NETERROR(EINTR))
|
2002-07-04 12:42:57 +02:00
|
|
|
continue;
|
2007-07-19 17:23:32 +02:00
|
|
|
return AVERROR(EIO);
|
2002-07-04 12:42:57 +02:00
|
|
|
}
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
/* then RTP */
|
|
|
|
if (FD_ISSET(s->rtp_fd, &rfds)) {
|
|
|
|
from_len = sizeof(from);
|
|
|
|
len = recvfrom (s->rtp_fd, buf, size, 0,
|
|
|
|
(struct sockaddr *)&from, &from_len);
|
|
|
|
if (len < 0) {
|
2007-04-27 02:35:54 +02:00
|
|
|
if (ff_neterrno() == FF_NETERROR(EAGAIN) ||
|
|
|
|
ff_neterrno() == FF_NETERROR(EINTR))
|
2002-07-04 12:42:57 +02:00
|
|
|
continue;
|
2007-07-19 17:23:32 +02:00
|
|
|
return AVERROR(EIO);
|
2002-07-04 12:42:57 +02:00
|
|
|
}
|
|
|
|
break;
|
|
|
|
}
|
2010-03-05 09:15:20 +01:00
|
|
|
} else if (n < 0) {
|
2010-03-26 17:04:38 +01:00
|
|
|
if (ff_neterrno() == FF_NETERROR(EINTR))
|
|
|
|
continue;
|
2010-03-05 09:15:20 +01:00
|
|
|
return AVERROR(EIO);
|
2002-07-04 12:42:57 +02:00
|
|
|
}
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
return len;
|
|
|
|
}
|
|
|
|
|
2010-06-01 09:46:23 +02:00
|
|
|
static int rtp_write(URLContext *h, const uint8_t *buf, int size)
|
2002-07-04 12:42:57 +02:00
|
|
|
{
|
|
|
|
RTPContext *s = h->priv_data;
|
2002-07-24 19:38:20 +02:00
|
|
|
int ret;
|
2002-07-04 12:42:57 +02:00
|
|
|
URLContext *hd;
|
2005-12-17 19:14:38 +01:00
|
|
|
|
2010-08-25 11:15:31 +02:00
|
|
|
if (buf[1] >= RTCP_SR && buf[1] <= RTCP_APP) {
|
2002-07-04 12:42:57 +02:00
|
|
|
/* RTCP payload type */
|
|
|
|
hd = s->rtcp_hd;
|
|
|
|
} else {
|
|
|
|
/* RTP payload type */
|
|
|
|
hd = s->rtp_hd;
|
|
|
|
}
|
|
|
|
|
|
|
|
ret = url_write(hd, buf, size);
|
|
|
|
#if 0
|
|
|
|
{
|
|
|
|
struct timespec ts;
|
|
|
|
ts.tv_sec = 0;
|
|
|
|
ts.tv_nsec = 10 * 1000000;
|
|
|
|
nanosleep(&ts, NULL);
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int rtp_close(URLContext *h)
|
|
|
|
{
|
|
|
|
RTPContext *s = h->priv_data;
|
|
|
|
|
|
|
|
url_close(s->rtp_hd);
|
|
|
|
url_close(s->rtcp_hd);
|
|
|
|
av_free(s);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
2010-04-19 13:40:45 +02:00
|
|
|
* Return the local rtp port used by the RTP connection
|
2010-07-02 12:49:29 +02:00
|
|
|
* @param h media file context
|
2010-04-19 13:40:45 +02:00
|
|
|
* @return the local port number
|
|
|
|
*/
|
|
|
|
|
|
|
|
int rtp_get_local_rtp_port(URLContext *h)
|
|
|
|
{
|
|
|
|
RTPContext *s = h->priv_data;
|
|
|
|
return udp_get_local_port(s->rtp_hd);
|
2002-07-04 12:42:57 +02:00
|
|
|
}
|
|
|
|
|
2010-04-19 13:40:45 +02:00
|
|
|
/**
|
|
|
|
* Return the local rtcp port used by the RTP connection
|
2010-07-02 12:49:29 +02:00
|
|
|
* @param h media file context
|
2010-04-19 13:40:45 +02:00
|
|
|
* @return the local port number
|
|
|
|
*/
|
|
|
|
|
|
|
|
int rtp_get_local_rtcp_port(URLContext *h)
|
|
|
|
{
|
|
|
|
RTPContext *s = h->priv_data;
|
|
|
|
return udp_get_local_port(s->rtcp_hd);
|
|
|
|
}
|
|
|
|
|
2009-03-03 18:04:51 +01:00
|
|
|
static int rtp_get_file_handle(URLContext *h)
|
|
|
|
{
|
|
|
|
RTPContext *s = h->priv_data;
|
|
|
|
return s->rtp_fd;
|
|
|
|
}
|
2002-07-04 12:42:57 +02:00
|
|
|
|
2010-08-25 19:32:59 +02:00
|
|
|
int rtp_get_rtcp_file_handle(URLContext *h) {
|
|
|
|
RTPContext *s = h->priv_data;
|
|
|
|
return s->rtcp_fd;
|
|
|
|
}
|
|
|
|
|
2011-01-25 23:03:28 +01:00
|
|
|
URLProtocol ff_rtp_protocol = {
|
2002-07-04 12:42:57 +02:00
|
|
|
"rtp",
|
|
|
|
rtp_open,
|
|
|
|
rtp_read,
|
|
|
|
rtp_write,
|
|
|
|
NULL, /* seek */
|
|
|
|
rtp_close,
|
2009-03-03 18:04:51 +01:00
|
|
|
.url_get_file_handle = rtp_get_file_handle,
|
2002-07-04 12:42:57 +02:00
|
|
|
};
|