561 lines
20 KiB
C
561 lines
20 KiB
C
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/*
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* RTP network protocol
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* Copyright (c) 2002 Fabrice Bellard
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*
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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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* 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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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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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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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* RTP protocol
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*/
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#include "libavutil/parseutils.h"
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#include "libavutil/avstring.h"
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#include "libavutil/opt.h"
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#include "avformat.h"
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#include "avio_internal.h"
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#include "rtp.h"
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#include "rtpproto.h"
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#include "url.h"
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#include "ip.h"
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#include <stdarg.h>
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#include "internal.h"
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#include "network.h"
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#include "os_support.h"
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#include <fcntl.h>
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#if HAVE_POLL_H
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#include <poll.h>
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#endif
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typedef struct RTPContext {
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const AVClass *class;
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URLContext *rtp_hd, *rtcp_hd, *fec_hd;
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int rtp_fd, rtcp_fd;
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IPSourceFilters filters;
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int write_to_source;
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struct sockaddr_storage last_rtp_source, last_rtcp_source;
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socklen_t last_rtp_source_len, last_rtcp_source_len;
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int ttl;
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int buffer_size;
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int rtcp_port, local_rtpport, local_rtcpport;
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int connect;
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int pkt_size;
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int dscp;
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char *sources;
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char *block;
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char *fec_options_str;
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} RTPContext;
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#define OFFSET(x) offsetof(RTPContext, x)
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#define D AV_OPT_FLAG_DECODING_PARAM
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#define E AV_OPT_FLAG_ENCODING_PARAM
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static const AVOption options[] = {
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{ "ttl", "Time to live (in milliseconds, multicast only)", OFFSET(ttl), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, .flags = D|E },
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{ "buffer_size", "Send/Receive buffer size (in bytes)", OFFSET(buffer_size), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, .flags = D|E },
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{ "rtcp_port", "Custom rtcp port", OFFSET(rtcp_port), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, .flags = D|E },
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{ "local_rtpport", "Local rtp port", OFFSET(local_rtpport), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, .flags = D|E },
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{ "local_rtcpport", "Local rtcp port", OFFSET(local_rtcpport), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, .flags = D|E },
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{ "connect", "Connect socket", OFFSET(connect), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, .flags = D|E },
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{ "write_to_source", "Send packets to the source address of the latest received packet", OFFSET(write_to_source), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, .flags = D|E },
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{ "pkt_size", "Maximum packet size", OFFSET(pkt_size), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, .flags = D|E },
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{ "dscp", "DSCP class", OFFSET(dscp), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, .flags = D|E },
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{ "sources", "Source list", OFFSET(sources), AV_OPT_TYPE_STRING, { .str = NULL }, .flags = D|E },
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{ "block", "Block list", OFFSET(block), AV_OPT_TYPE_STRING, { .str = NULL }, .flags = D|E },
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{ "fec", "FEC", OFFSET(fec_options_str), AV_OPT_TYPE_STRING, { .str = NULL }, .flags = E },
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{ NULL }
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};
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static const AVClass rtp_class = {
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.class_name = "rtp",
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.item_name = av_default_item_name,
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.option = options,
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.version = LIBAVUTIL_VERSION_INT,
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};
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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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*
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* @param h media file context
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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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int ff_rtp_set_remote_url(URLContext *h, const char *uri)
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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, rtcp_port;
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const char *p;
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char buf[1024];
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char path[1024];
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av_url_split(NULL, 0, NULL, 0, hostname, sizeof(hostname), &port,
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path, sizeof(path), uri);
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rtcp_port = port + 1;
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p = strchr(uri, '?');
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if (p) {
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if (av_find_info_tag(buf, sizeof(buf), "rtcpport", p)) {
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rtcp_port = strtol(buf, NULL, 10);
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}
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}
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ff_url_join(buf, sizeof(buf), "udp", NULL, hostname, port, "%s", path);
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ff_udp_set_remote_url(s->rtp_hd, buf);
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ff_url_join(buf, sizeof(buf), "udp", NULL, hostname, rtcp_port, "%s", path);
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ff_udp_set_remote_url(s->rtcp_hd, buf);
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return 0;
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}
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static int get_port(const struct sockaddr_storage *ss)
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{
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if (ss->ss_family == AF_INET)
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return ntohs(((const struct sockaddr_in *)ss)->sin_port);
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#if HAVE_STRUCT_SOCKADDR_IN6
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if (ss->ss_family == AF_INET6)
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return ntohs(((const struct sockaddr_in6 *)ss)->sin6_port);
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#endif
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return 0;
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}
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static void set_port(struct sockaddr_storage *ss, int port)
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{
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if (ss->ss_family == AF_INET)
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((struct sockaddr_in *)ss)->sin_port = htons(port);
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#if HAVE_STRUCT_SOCKADDR_IN6
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else if (ss->ss_family == AF_INET6)
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((struct sockaddr_in6 *)ss)->sin6_port = htons(port);
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#endif
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}
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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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static av_printf_format(3, 4) void url_add_option(char *buf, int buf_size, const char *fmt, ...)
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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, '?'))
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av_strlcat(buf, "&", buf_size);
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else
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av_strlcat(buf, "?", buf_size);
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vsnprintf(buf1, sizeof(buf1), fmt, ap);
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av_strlcat(buf, buf1, buf_size);
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va_end(ap);
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}
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static void build_udp_url(RTPContext *s,
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char *buf, int buf_size,
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const char *hostname,
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int port, int local_port,
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const char *include_sources,
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const char *exclude_sources)
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{
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ff_url_join(buf, buf_size, "udp", NULL, hostname, port, NULL);
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if (local_port >= 0)
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url_add_option(buf, buf_size, "localport=%d", local_port);
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if (s->ttl >= 0)
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url_add_option(buf, buf_size, "ttl=%d", s->ttl);
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if (s->buffer_size >= 0)
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url_add_option(buf, buf_size, "buffer_size=%d", s->buffer_size);
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if (s->pkt_size >= 0)
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url_add_option(buf, buf_size, "pkt_size=%d", s->pkt_size);
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if (s->connect)
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url_add_option(buf, buf_size, "connect=1");
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if (s->dscp >= 0)
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url_add_option(buf, buf_size, "dscp=%d", s->dscp);
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url_add_option(buf, buf_size, "fifo_size=0");
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if (include_sources && include_sources[0])
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url_add_option(buf, buf_size, "sources=%s", include_sources);
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if (exclude_sources && exclude_sources[0])
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url_add_option(buf, buf_size, "block=%s", exclude_sources);
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}
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/**
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* url syntax: rtp://host:port[?option=val...]
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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
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* 'connect=0/1' : do a connect() on the UDP socket
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* 'sources=ip[,ip]' : list allowed source IP addresses
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* 'block=ip[,ip]' : list disallowed source IP addresses
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* 'write_to_source=0/1' : send packets to the source address of the latest received packet
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* 'dscp=n' : set DSCP value to n (QoS)
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* deprecated option:
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* 'localport=n' : set the local port to n
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*
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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
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*/
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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 = h->priv_data;
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AVDictionary *fec_opts = NULL;
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int rtp_port;
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char hostname[256], include_sources[1024] = "", exclude_sources[1024] = "";
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char *sources = include_sources, *block = exclude_sources;
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char *fec_protocol = NULL;
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char buf[1024];
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char path[1024];
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const char *p;
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int i, max_retry_count = 3;
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int rtcpflags;
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av_url_split(NULL, 0, NULL, 0, hostname, sizeof(hostname), &rtp_port,
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path, sizeof(path), uri);
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/* extract parameters */
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if (s->rtcp_port < 0)
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s->rtcp_port = rtp_port + 1;
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p = strchr(uri, '?');
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if (p) {
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if (av_find_info_tag(buf, sizeof(buf), "ttl", p)) {
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s->ttl = strtol(buf, NULL, 10);
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}
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if (av_find_info_tag(buf, sizeof(buf), "rtcpport", p)) {
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s->rtcp_port = strtol(buf, NULL, 10);
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}
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if (av_find_info_tag(buf, sizeof(buf), "localport", p)) {
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s->local_rtpport = strtol(buf, NULL, 10);
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}
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if (av_find_info_tag(buf, sizeof(buf), "localrtpport", p)) {
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s->local_rtpport = strtol(buf, NULL, 10);
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}
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if (av_find_info_tag(buf, sizeof(buf), "localrtcpport", p)) {
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s->local_rtcpport = strtol(buf, NULL, 10);
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}
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if (av_find_info_tag(buf, sizeof(buf), "pkt_size", p)) {
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s->pkt_size = strtol(buf, NULL, 10);
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}
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if (av_find_info_tag(buf, sizeof(buf), "connect", p)) {
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s->connect = strtol(buf, NULL, 10);
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}
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if (av_find_info_tag(buf, sizeof(buf), "write_to_source", p)) {
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s->write_to_source = strtol(buf, NULL, 10);
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}
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if (av_find_info_tag(buf, sizeof(buf), "dscp", p)) {
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s->dscp = strtol(buf, NULL, 10);
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}
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if (av_find_info_tag(buf, sizeof(buf), "sources", p)) {
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av_strlcpy(include_sources, buf, sizeof(include_sources));
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ff_ip_parse_sources(h, buf, &s->filters);
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} else {
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ff_ip_parse_sources(h, s->sources, &s->filters);
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sources = s->sources;
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}
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if (av_find_info_tag(buf, sizeof(buf), "block", p)) {
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av_strlcpy(exclude_sources, buf, sizeof(exclude_sources));
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ff_ip_parse_blocks(h, buf, &s->filters);
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} else {
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ff_ip_parse_blocks(h, s->block, &s->filters);
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block = s->block;
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}
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}
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if (s->fec_options_str) {
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p = s->fec_options_str;
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if (!(fec_protocol = av_get_token(&p, "="))) {
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av_log(h, AV_LOG_ERROR, "Failed to parse the FEC protocol value\n");
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goto fail;
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}
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if (strcmp(fec_protocol, "prompeg")) {
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av_log(h, AV_LOG_ERROR, "Unsupported FEC protocol %s\n", fec_protocol);
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goto fail;
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}
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p = s->fec_options_str + strlen(fec_protocol);
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while (*p && *p == '=') p++;
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if (av_dict_parse_string(&fec_opts, p, "=", ":", 0) < 0) {
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av_log(h, AV_LOG_ERROR, "Failed to parse the FEC options\n");
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goto fail;
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}
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if (s->ttl > 0) {
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av_dict_set_int(&fec_opts, "ttl", s->ttl, 0);
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}
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}
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for (i = 0; i < max_retry_count; i++) {
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build_udp_url(s, buf, sizeof(buf),
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hostname, rtp_port, s->local_rtpport,
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sources, block);
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if (ffurl_open_whitelist(&s->rtp_hd, buf, flags, &h->interrupt_callback,
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NULL, h->protocol_whitelist, h->protocol_blacklist, h) < 0)
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goto fail;
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s->local_rtpport = ff_udp_get_local_port(s->rtp_hd);
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if(s->local_rtpport == 65535) {
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s->local_rtpport = -1;
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continue;
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}
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rtcpflags = flags | AVIO_FLAG_WRITE;
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if (s->local_rtcpport < 0) {
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s->local_rtcpport = s->local_rtpport + 1;
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build_udp_url(s, buf, sizeof(buf),
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||
|
|
hostname, s->rtcp_port, s->local_rtcpport,
|
||
|
|
sources, block);
|
||
|
|
if (ffurl_open_whitelist(&s->rtcp_hd, buf, rtcpflags,
|
||
|
|
&h->interrupt_callback, NULL,
|
||
|
|
h->protocol_whitelist, h->protocol_blacklist, h) < 0) {
|
||
|
|
s->local_rtpport = s->local_rtcpport = -1;
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
build_udp_url(s, buf, sizeof(buf),
|
||
|
|
hostname, s->rtcp_port, s->local_rtcpport,
|
||
|
|
sources, block);
|
||
|
|
if (ffurl_open_whitelist(&s->rtcp_hd, buf, rtcpflags, &h->interrupt_callback,
|
||
|
|
NULL, h->protocol_whitelist, h->protocol_blacklist, h) < 0)
|
||
|
|
goto fail;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
s->fec_hd = NULL;
|
||
|
|
if (fec_protocol) {
|
||
|
|
ff_url_join(buf, sizeof(buf), fec_protocol, NULL, hostname, rtp_port, NULL);
|
||
|
|
if (ffurl_open_whitelist(&s->fec_hd, buf, flags, &h->interrupt_callback,
|
||
|
|
&fec_opts, h->protocol_whitelist, h->protocol_blacklist, h) < 0)
|
||
|
|
goto fail;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* just to ease handle access. XXX: need to suppress direct handle
|
||
|
|
access */
|
||
|
|
s->rtp_fd = ffurl_get_file_handle(s->rtp_hd);
|
||
|
|
s->rtcp_fd = ffurl_get_file_handle(s->rtcp_hd);
|
||
|
|
|
||
|
|
h->max_packet_size = s->rtp_hd->max_packet_size;
|
||
|
|
h->is_streamed = 1;
|
||
|
|
|
||
|
|
av_free(fec_protocol);
|
||
|
|
av_dict_free(&fec_opts);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
fail:
|
||
|
|
ffurl_closep(&s->rtp_hd);
|
||
|
|
ffurl_closep(&s->rtcp_hd);
|
||
|
|
ffurl_closep(&s->fec_hd);
|
||
|
|
av_free(fec_protocol);
|
||
|
|
av_dict_free(&fec_opts);
|
||
|
|
return AVERROR(EIO);
|
||
|
|
}
|
||
|
|
|
||
|
|
static int rtp_read(URLContext *h, uint8_t *buf, int size)
|
||
|
|
{
|
||
|
|
RTPContext *s = h->priv_data;
|
||
|
|
int len, n, i;
|
||
|
|
struct pollfd p[2] = {{s->rtp_fd, POLLIN, 0}, {s->rtcp_fd, POLLIN, 0}};
|
||
|
|
int poll_delay = h->flags & AVIO_FLAG_NONBLOCK ? 0 : 100;
|
||
|
|
struct sockaddr_storage *addrs[2] = { &s->last_rtp_source, &s->last_rtcp_source };
|
||
|
|
socklen_t *addr_lens[2] = { &s->last_rtp_source_len, &s->last_rtcp_source_len };
|
||
|
|
|
||
|
|
for(;;) {
|
||
|
|
if (ff_check_interrupt(&h->interrupt_callback))
|
||
|
|
return AVERROR_EXIT;
|
||
|
|
n = poll(p, 2, poll_delay);
|
||
|
|
if (n > 0) {
|
||
|
|
/* first try RTCP, then RTP */
|
||
|
|
for (i = 1; i >= 0; i--) {
|
||
|
|
if (!(p[i].revents & POLLIN))
|
||
|
|
continue;
|
||
|
|
*addr_lens[i] = sizeof(*addrs[i]);
|
||
|
|
len = recvfrom(p[i].fd, buf, size, 0,
|
||
|
|
(struct sockaddr *)addrs[i], addr_lens[i]);
|
||
|
|
if (len < 0) {
|
||
|
|
if (ff_neterrno() == AVERROR(EAGAIN) ||
|
||
|
|
ff_neterrno() == AVERROR(EINTR))
|
||
|
|
continue;
|
||
|
|
return AVERROR(EIO);
|
||
|
|
}
|
||
|
|
if (ff_ip_check_source_lists(addrs[i], &s->filters))
|
||
|
|
continue;
|
||
|
|
return len;
|
||
|
|
}
|
||
|
|
} else if (n < 0) {
|
||
|
|
if (ff_neterrno() == AVERROR(EINTR))
|
||
|
|
continue;
|
||
|
|
return AVERROR(EIO);
|
||
|
|
}
|
||
|
|
if (h->flags & AVIO_FLAG_NONBLOCK)
|
||
|
|
return AVERROR(EAGAIN);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
static int rtp_write(URLContext *h, const uint8_t *buf, int size)
|
||
|
|
{
|
||
|
|
RTPContext *s = h->priv_data;
|
||
|
|
int ret, ret_fec;
|
||
|
|
URLContext *hd;
|
||
|
|
|
||
|
|
if (size < 2)
|
||
|
|
return AVERROR(EINVAL);
|
||
|
|
|
||
|
|
if ((buf[0] & 0xc0) != (RTP_VERSION << 6))
|
||
|
|
av_log(h, AV_LOG_WARNING, "Data doesn't look like RTP packets, "
|
||
|
|
"make sure the RTP muxer is used\n");
|
||
|
|
|
||
|
|
if (s->write_to_source) {
|
||
|
|
int fd;
|
||
|
|
struct sockaddr_storage *source, temp_source;
|
||
|
|
socklen_t *source_len, temp_len;
|
||
|
|
if (!s->last_rtp_source.ss_family && !s->last_rtcp_source.ss_family) {
|
||
|
|
av_log(h, AV_LOG_ERROR,
|
||
|
|
"Unable to send packet to source, no packets received yet\n");
|
||
|
|
// Intentionally not returning an error here
|
||
|
|
return size;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (RTP_PT_IS_RTCP(buf[1])) {
|
||
|
|
fd = s->rtcp_fd;
|
||
|
|
source = &s->last_rtcp_source;
|
||
|
|
source_len = &s->last_rtcp_source_len;
|
||
|
|
} else {
|
||
|
|
fd = s->rtp_fd;
|
||
|
|
source = &s->last_rtp_source;
|
||
|
|
source_len = &s->last_rtp_source_len;
|
||
|
|
}
|
||
|
|
if (!source->ss_family) {
|
||
|
|
source = &temp_source;
|
||
|
|
source_len = &temp_len;
|
||
|
|
if (RTP_PT_IS_RTCP(buf[1])) {
|
||
|
|
temp_source = s->last_rtp_source;
|
||
|
|
temp_len = s->last_rtp_source_len;
|
||
|
|
set_port(source, get_port(source) + 1);
|
||
|
|
av_log(h, AV_LOG_INFO,
|
||
|
|
"Not received any RTCP packets yet, inferring peer port "
|
||
|
|
"from the RTP port\n");
|
||
|
|
} else {
|
||
|
|
temp_source = s->last_rtcp_source;
|
||
|
|
temp_len = s->last_rtcp_source_len;
|
||
|
|
set_port(source, get_port(source) - 1);
|
||
|
|
av_log(h, AV_LOG_INFO,
|
||
|
|
"Not received any RTP packets yet, inferring peer port "
|
||
|
|
"from the RTCP port\n");
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!(h->flags & AVIO_FLAG_NONBLOCK)) {
|
||
|
|
ret = ff_network_wait_fd(fd, 1);
|
||
|
|
if (ret < 0)
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
ret = sendto(fd, buf, size, 0, (struct sockaddr *) source,
|
||
|
|
*source_len);
|
||
|
|
|
||
|
|
return ret < 0 ? ff_neterrno() : ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (RTP_PT_IS_RTCP(buf[1])) {
|
||
|
|
/* RTCP payload type */
|
||
|
|
hd = s->rtcp_hd;
|
||
|
|
} else {
|
||
|
|
/* RTP payload type */
|
||
|
|
hd = s->rtp_hd;
|
||
|
|
}
|
||
|
|
|
||
|
|
if ((ret = ffurl_write(hd, buf, size)) < 0) {
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (s->fec_hd && !RTP_PT_IS_RTCP(buf[1])) {
|
||
|
|
if ((ret_fec = ffurl_write(s->fec_hd, buf, size)) < 0) {
|
||
|
|
av_log(h, AV_LOG_ERROR, "Failed to send FEC\n");
|
||
|
|
return ret_fec;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int rtp_close(URLContext *h)
|
||
|
|
{
|
||
|
|
RTPContext *s = h->priv_data;
|
||
|
|
|
||
|
|
ff_ip_reset_filters(&s->filters);
|
||
|
|
|
||
|
|
ffurl_closep(&s->rtp_hd);
|
||
|
|
ffurl_closep(&s->rtcp_hd);
|
||
|
|
ffurl_closep(&s->fec_hd);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Return the local rtp port used by the RTP connection
|
||
|
|
* @param h media file context
|
||
|
|
* @return the local port number
|
||
|
|
*/
|
||
|
|
|
||
|
|
int ff_rtp_get_local_rtp_port(URLContext *h)
|
||
|
|
{
|
||
|
|
RTPContext *s = h->priv_data;
|
||
|
|
return ff_udp_get_local_port(s->rtp_hd);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Return the local rtcp port used by the RTP connection
|
||
|
|
* @param h media file context
|
||
|
|
* @return the local port number
|
||
|
|
*/
|
||
|
|
|
||
|
|
static int rtp_get_file_handle(URLContext *h)
|
||
|
|
{
|
||
|
|
RTPContext *s = h->priv_data;
|
||
|
|
return s->rtp_fd;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int rtp_get_multi_file_handle(URLContext *h, int **handles,
|
||
|
|
int *numhandles)
|
||
|
|
{
|
||
|
|
RTPContext *s = h->priv_data;
|
||
|
|
int *hs = *handles = av_malloc(sizeof(**handles) * 2);
|
||
|
|
if (!hs)
|
||
|
|
return AVERROR(ENOMEM);
|
||
|
|
hs[0] = s->rtp_fd;
|
||
|
|
hs[1] = s->rtcp_fd;
|
||
|
|
*numhandles = 2;
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
const URLProtocol ff_rtp_protocol = {
|
||
|
|
.name = "rtp",
|
||
|
|
.url_open = rtp_open,
|
||
|
|
.url_read = rtp_read,
|
||
|
|
.url_write = rtp_write,
|
||
|
|
.url_close = rtp_close,
|
||
|
|
.url_get_file_handle = rtp_get_file_handle,
|
||
|
|
.url_get_multi_file_handle = rtp_get_multi_file_handle,
|
||
|
|
.priv_data_size = sizeof(RTPContext),
|
||
|
|
.flags = URL_PROTOCOL_FLAG_NETWORK,
|
||
|
|
.priv_data_class = &rtp_class,
|
||
|
|
};
|