+++ /dev/null
-/*
- * RTP network protocol
- * Copyright (c) 2002 Fabrice Bellard.
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
-#include "avformat.h"
-
-#include <unistd.h>
-#include <stdarg.h>
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <netinet/in.h>
-#ifndef __BEOS__
-# include <arpa/inet.h>
-#else
-# include "barpainet.h"
-#endif
-#include <netdb.h>
-#include <fcntl.h>
-
-#define RTP_TX_BUF_SIZE (64 * 1024)
-#define RTP_RX_BUF_SIZE (128 * 1024)
-
-typedef struct RTPContext {
- URLContext *rtp_hd, *rtcp_hd;
- int rtp_fd, rtcp_fd;
-} RTPContext;
-
-/**
- * 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.
- *
- * @param s1 media file context
- * @param uri of the remote server
- * @return zero if no error.
- */
-int rtp_set_remote_url(URLContext *h, const char *uri)
-{
- RTPContext *s = h->priv_data;
- char hostname[256];
- int port;
-
- char buf[1024];
- char path[1024];
-
- url_split(NULL, 0, hostname, sizeof(hostname), &port,
- path, sizeof(path), uri);
-
- snprintf(buf, sizeof(buf), "udp://%s:%d%s", hostname, port, path);
- udp_set_remote_url(s->rtp_hd, buf);
-
- snprintf(buf, sizeof(buf), "udp://%s:%d%s", hostname, port + 1, path);
- udp_set_remote_url(s->rtcp_hd, buf);
- return 0;
-}
-
-
-/* add option to url of the form:
- "http://host:port/path?option1=val1&option2=val2... */
-static void url_add_option(char *buf, int buf_size, const char *fmt, ...)
-{
- char buf1[1024];
- va_list ap;
-
- va_start(ap, fmt);
- if (strchr(buf, '?'))
- pstrcat(buf, buf_size, "&");
- else
- pstrcat(buf, buf_size, "?");
- vsnprintf(buf1, sizeof(buf1), fmt, ap);
- pstrcat(buf, buf_size, buf1);
- va_end(ap);
-}
-
-static void build_udp_url(char *buf, int buf_size,
- const char *hostname, int port,
- int local_port, int multicast, int ttl)
-{
- snprintf(buf, buf_size, "udp://%s:%d", hostname, port);
- if (local_port >= 0)
- url_add_option(buf, buf_size, "localport=%d", local_port);
- if (multicast)
- url_add_option(buf, buf_size, "multicast=1", multicast);
- if (ttl >= 0)
- url_add_option(buf, buf_size, "ttl=%d", ttl);
-}
-
-/*
- * url syntax: rtp://host:port[?option=val...]
- * option: 'multicast=1' : enable multicast
- * 'ttl=n' : set the ttl value (for multicast only)
- * 'localport=n' : set the local port to n
- *
- */
-static int rtp_open(URLContext *h, const char *uri, int flags)
-{
- RTPContext *s;
- int port, is_output, is_multicast, ttl, local_port;
- char hostname[256];
- char buf[1024];
- char path[1024];
- const char *p;
-
- is_output = (flags & URL_WRONLY);
-
- s = av_mallocz(sizeof(RTPContext));
- if (!s)
- return -ENOMEM;
- h->priv_data = s;
-
- url_split(NULL, 0, hostname, sizeof(hostname), &port,
- path, sizeof(path), uri);
- /* extract parameters */
- is_multicast = 0;
- ttl = -1;
- local_port = -1;
- p = strchr(uri, '?');
- if (p) {
- is_multicast = find_info_tag(buf, sizeof(buf), "multicast", p);
- if (find_info_tag(buf, sizeof(buf), "ttl", p)) {
- ttl = strtol(buf, NULL, 10);
- }
- if (find_info_tag(buf, sizeof(buf), "localport", p)) {
- local_port = strtol(buf, NULL, 10);
- }
- }
-
- build_udp_url(buf, sizeof(buf),
- hostname, port, local_port, is_multicast, ttl);
- if (url_open(&s->rtp_hd, buf, flags) < 0)
- goto fail;
- local_port = udp_get_local_port(s->rtp_hd);
- /* XXX: need to open another connexion if the port is not even */
-
- /* well, should suppress localport in path */
-
- build_udp_url(buf, sizeof(buf),
- hostname, port + 1, local_port + 1, is_multicast, ttl);
- if (url_open(&s->rtcp_hd, buf, flags) < 0)
- goto fail;
-
- /* just to ease handle access. XXX: need to suppress direct handle
- access */
- s->rtp_fd = udp_get_file_handle(s->rtp_hd);
- s->rtcp_fd = udp_get_file_handle(s->rtcp_hd);
-
- h->max_packet_size = url_get_max_packet_size(s->rtp_hd);
- 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);
- return -EIO;
-}
-
-static int rtp_read(URLContext *h, uint8_t *buf, int size)
-{
- RTPContext *s = h->priv_data;
- struct sockaddr_in from;
- int from_len, len, fd_max, n;
- fd_set rfds;
-#if 0
- for(;;) {
- from_len = sizeof(from);
- len = recvfrom (s->rtp_fd, buf, size, 0,
- (struct sockaddr *)&from, &from_len);
- if (len < 0) {
- if (errno == EAGAIN || errno == EINTR)
- continue;
- return -EIO;
- }
- break;
- }
-#else
- for(;;) {
- /* 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);
- n = select(fd_max + 1, &rfds, NULL, NULL, NULL);
- 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) {
- if (errno == EAGAIN || errno == EINTR)
- continue;
- return -EIO;
- }
- 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) {
- if (errno == EAGAIN || errno == EINTR)
- continue;
- return -EIO;
- }
- break;
- }
- }
- }
-#endif
- return len;
-}
-
-static int rtp_write(URLContext *h, uint8_t *buf, int size)
-{
- RTPContext *s = h->priv_data;
- int ret;
- URLContext *hd;
-
- if (buf[1] >= 200 && buf[1] <= 204) {
- /* 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;
-}
-
-/**
- * Return the local port used by the RTP connexion
- * @param s1 media file context
- * @return the local port number
- */
-int rtp_get_local_port(URLContext *h)
-{
- RTPContext *s = h->priv_data;
- return udp_get_local_port(s->rtp_hd);
-}
-
-/**
- * Return the rtp and rtcp file handles for select() usage to wait for several RTP
- * streams at the same time.
- * @param h media file context
- */
-void rtp_get_file_handles(URLContext *h, int *prtp_fd, int *prtcp_fd)
-{
- RTPContext *s = h->priv_data;
-
- *prtp_fd = s->rtp_fd;
- *prtcp_fd = s->rtcp_fd;
-}
-
-URLProtocol rtp_protocol = {
- "rtp",
- rtp_open,
- rtp_read,
- rtp_write,
- NULL, /* seek */
- rtp_close,
-};
projects / synfig.git / blobdiff