int start_server(const char *url, const char *rtspport)
{
int mediafd = -1, listenfd, tempfd, maxfd;
int videofd;
struct addrinfo *info;
struct sockaddr_storage remoteaddr;
socklen_t addrlen = sizeof remoteaddr;
fd_set readfds, masterfds;
int nready, i;
int videosize, videoleft;
int recvd, sent;
char urlhost[URLSIZE], urlpath[URLSIZE], tempstr[URLSIZE];
unsigned char msgbuf[BUFSIZE], sendbuf[BUFSIZE];
char *temp;
RTSPMsg rtspmsg;
Client streamclient;
/* The current state of the protocol */
int mediastate = IDLE;
int quit = 0;
init_client(&streamclient);
/* Open the a file where the video is to be stored */
if ((videofd = open("videotemp.mp4", O_RDWR | O_CREAT | O_TRUNC, S_IRWXU)) < 0) {
fatal_error("Error opening the temporary videofile");
}
/* Create the RTSP listening socket */
resolve_host(NULL, rtspport, SOCK_STREAM, AI_PASSIVE, &info);
listenfd = server_socket(info);
maxfd = listenfd;
FD_ZERO(&readfds);
FD_ZERO(&masterfds);
FD_SET(listenfd, &masterfds);
while (!quit) {
readfds = masterfds;
if ((nready = Select(maxfd + 1, &readfds, NULL)) == -1) {
write_log(logfd, "Select interrupted by a signal\n");
}
for (i = 0; i <= maxfd; i++) {
if (FD_ISSET(i, &readfds)) {
nready--;
/* New connection from a client */
if (i == listenfd) {
if ((tempfd = accept(i, (struct sockaddr *)&remoteaddr, &addrlen)) == -1) {
if (errno != EWOULDBLOCK && errno != ECONNABORTED &&
errno != EPROTO && errno != EINTR)
{
fatal_error("accept");
}
}
/* If we are already serving a client, close the new connection. Otherwise, continue. */
if (streamclient.state != NOCLIENT) close (tempfd);
else {
streamclient.rtspfd = tempfd;
streamclient.state = CLICONNECTED;
maxfd = max(2, streamclient.rtspfd, maxfd);
FD_SET(streamclient.rtspfd, &masterfds);
}
}
/* Data from the media source */
else if (i == mediafd) {
switch (mediastate) {
case GETSENT:
/* Read ONLY the HTTP message from the socket and store the video size */
recvd = recv_all(i, msgbuf, BUFSIZE, MSG_PEEK);
temp = strstr((char *)msgbuf, "\r\n\r\n");
recvd = recv_all(i, msgbuf, (int)(temp + 4 - (char *)msgbuf), 0);
temp = strstr((char *)msgbuf, "Content-Length:");
sscanf(temp, "Content-Length: %d", &videosize);
videoleft = videosize;
mediastate = RECVTCP;
break;
case RECVTCP:
if ((recvd = recv_all(i, msgbuf, BUFSIZE, 0)) == 0) {
FD_CLR(i, &masterfds);
close(i);
printf("Socket closed\n");
}
writestr(videofd, msgbuf, recvd);
videoleft -= recvd;
if (videoleft <= 0) mediastate = STREAM;
break;
/* TODO: Start streaming, currently just exits the program */
case STREAM:
/*
close(videofd);
close(mediafd);
close(listenfd);
quit = 1;
*/
break;
default:
break;
}
}
/* Data from a client ( i == streamclient.rtspfd) */
else {
if ((recvd = recv_all(i, msgbuf, BUFSIZE, 0)) == 0) {
FD_CLR(i, &masterfds);
close(i);
printf("Socket closed\n");
streamclient.state = NOCLIENT;
}
else {
printf("%s", msgbuf);
parse_rtsp(&rtspmsg, msgbuf);
}
switch (streamclient.state) {
case CLICONNECTED:
if (rtspmsg.type == OPTIONS) {
sent = rtsp_options(&rtspmsg, sendbuf);
send_all(i, sendbuf, sent);
}
else if (rtspmsg.type == DESCRIBE) {
/* Start fetching the file from the server */
parse_url(url, urlhost, urlpath);
resolve_host(urlhost, "80", SOCK_STREAM, 0, &info);
mediafd = client_socket(info, 0);
FD_SET(mediafd, &masterfds);
maxfd = max(2, maxfd, mediafd);
/* Send the GET message */
http_get(url, msgbuf);
send_all(mediafd, msgbuf, strlen((char *)msgbuf));
mediastate = GETSENT;
/* TODO: parse SDP from the media file rather than hardcoding it */
sent = rtsp_describe(&rtspmsg, sendbuf);
send_all(i, sendbuf, sent);
streamclient.state = SDPSENT;
}
break;
case SDPSENT:
if (rtspmsg.type == SETUP) {
sent = rtsp_setup(&rtspmsg, sendbuf, 50508, 50509);
send_all(i, sendbuf, sent);
write_remote_ip(tempstr, streamclient.rtspfd);
resolve_host(tempstr, rtspmsg.clirtpport, 0, SOCK_DGRAM, &info);
streamclient.videofds[0] = client_socket(info, 50508);
resolve_host(tempstr, rtspmsg.clirtcpport, 0, SOCK_DGRAM, &info);
streamclient.videofds[1] = client_socket(info, 50509);
streamclient.state = SETUPSENT;
}
break;
case SETUPSENT:
if (rtspmsg.type == PLAY) {
}
break;
default:
break;
}
}
}
if (nready <= 0) break;
}
}
return 1;
}
/* main app */
int main(int argc, char *const argv[])
{
#if 1
const char *transport = "RTP/AVP;unicast;client_port=1234-1235"; /* UDP */
#else
const char *transport = "RTP/AVP/TCP;unicast;client_port=1234-1235"; /* TCP */
#endif
const char *range = "0.000-";
int rc = EXIT_SUCCESS;
char *base_name = NULL;
printf("\nRTSP request %s\n", VERSION_STR);
printf(" Project web site: http://code.google.com/p/rtsprequest/\n");
printf(" Requires cURL V7.20 or greater\n\n");
/* check command line */
if ((argc != 2) && (argc != 3)) {
base_name = strrchr(argv[0], '/');
if (base_name == NULL) {
base_name = strrchr(argv[0], '\\');
}
if (base_name == NULL) {
base_name = argv[0];
} else {
base_name++;
}
printf("Usage: %s url [transport]\n", base_name);
printf(" url of video server\n");
printf
(" transport (optional) specifier for media stream protocol\n");
printf(" default transport: %s\n", transport);
printf("Example: %s rtsp://192.168.0.2/media/video1\n\n",
base_name);
rc = EXIT_FAILURE;
} else {
const char *url = argv[1];
char *uri = malloc(strlen(url) + 32);
char *sdp_filename = malloc(strlen(url) + 32);
char *control = malloc(strlen(url) + 32);
CURLcode res;
get_sdp_filename(url, sdp_filename);
if (argc == 3) {
transport = argv[2];
}
/* initialize curl */
res = curl_global_init(CURL_GLOBAL_ALL);
if (res == CURLE_OK) {
curl_version_info_data *data =
curl_version_info(CURLVERSION_NOW);
CURL *curl;
fprintf(stderr, " cURL V%s loaded\n", data->version);
/* initialize this curl session */
curl = curl_easy_init();
if (curl != NULL) {
my_curl_easy_setopt(curl, CURLOPT_VERBOSE, 0L);
my_curl_easy_setopt(curl, CURLOPT_NOPROGRESS,
1L);
my_curl_easy_setopt(curl, CURLOPT_HEADERDATA,
stdout);
my_curl_easy_setopt(curl, CURLOPT_URL, url);
/* request server options */
sprintf(uri, "%s", url);
rtsp_options(curl, uri);
/* request session description and write response to sdp file */
rtsp_describe(curl, uri, sdp_filename);
/* get media control attribute from sdp file */
get_media_control_attribute(sdp_filename,
control);
/* setup media stream */
sprintf(uri, "%s/%s", url, control);
rtsp_setup(curl, uri, transport);
/* start playing media stream */
sprintf(uri, "%s/", url);
rtsp_play(curl, uri, range);
printf
("Playing video, press any key to stop ...");
_getch();
printf("\n");
/* teardown session */
rtsp_teardown(curl, uri);
/* cleanup */
curl_easy_cleanup(curl);
curl = NULL;
} else {
fprintf(stderr, "curl_easy_init() failed\n");
}
curl_global_cleanup();
} else {
fprintf(stderr, "curl_global_init(%s) failed: %d\n",
"CURL_GLOBAL_ALL", res);
}
free(control);
free(sdp_filename);
free(uri);
}
return rc;
}
int start_server(const char *url, const char *rtspport)
{
int mediafd = -1, listenfd, tempfd, maxfd;
int videofd;
struct addrinfo *info;
struct sockaddr_storage remoteaddr;
socklen_t addrlen = sizeof remoteaddr;
fd_set readfds, masterfds;
struct timeval *timeout, *timeind = NULL, timenow;
int nready, i;
int videosize, videoleft;
int recvd, sent;
char urlhost[URLSIZE], urlpath[URLSIZE], tempstr[URLSIZE];
unsigned char msgbuf[BUFSIZE], sendbuf[BUFSIZE];
char *temp;
unsigned char *sps = NULL, *pps = NULL;
size_t spslen, ppslen;
RTSPMsg rtspmsg;
Client streamclient;
pthread_t threadid;
ThreadInfo *tinfo = NULL;
uint16_t rtpseqno_video = (rand() % 1000000);
uint16_t rtpseqno_audio = (rand() % 1000000);
TimeoutEvent *event;
/* The current state of the protocol */
int mediastate = IDLE;
int quit = 0;
int media_downloaded = 0;
timeout = (struct timeval *)malloc(sizeof(struct timeval));
init_client(&streamclient);
/* Open the a file where the video is to be stored */
if ((videofd = open("videotemp.mp4", O_RDWR | O_CREAT | O_TRUNC, S_IRWXU)) < 0) {
fatal_error("Error opening the temporary videofile");
}
/* Create the RTSP listening socket */
resolve_host(NULL, rtspport, SOCK_STREAM, AI_PASSIVE, &info);
listenfd = server_socket(info);
maxfd = listenfd;
FD_ZERO(&readfds);
FD_ZERO(&masterfds);
FD_SET(listenfd, &masterfds);
while (!quit) {
readfds = masterfds;
if ((nready = Select(maxfd + 1, &readfds, timeind)) == -1) {
printf("Select interrupted by a signal\n");
}
/* Timeout handling, used for packet pacing and other timeouts */
else if (nready == 0) {
timeind = NULL;
lock_mutex(&queuelock);
if ((event = pull_event(&queue)) != NULL) {
switch (event->type) {
case ENDOFSTREAM:
printf("MEDIA FINISHED\n");
break;
case FRAME:
/* Video frame */
if (event->frame->frametype == VIDEO_FRAME) {
rtpseqno_video += send_video_frame(sendbuf, event->frame, streamclient.videofds[0], rtpseqno_video);
}
/* Audio frame */
else {
rtpseqno_audio += send_audio_frame(sendbuf, event->frame, streamclient.audiofds[0], rtpseqno_audio);
}
free(event->frame->data);
free(event->frame);
break;
case CHECKMEDIASTATE:
oma_debug_print("Checking media ready for streaming...\n");
if (mediastate != STREAM) {
printf("Sending dummy RTP\n");
send_dummy_rtp(sendbuf, streamclient.videofds[0], &rtpseqno_video);
push_timeout(&queue, 1000, CHECKMEDIASTATE);
}
break;
default:
oma_debug_print("ERRORENOUS EVENT TYPE!\n");
break;
}
/* If there are elements left in the queue, calculate next timeout */
if (queue.size > 0) {
*timeout = calculate_delta(&event->time, &queue.first->time);
timeind = timeout;
oma_debug_print("Timeout: %ld secs, %ld usecs\n", timeout->tv_sec, timeout->tv_usec);
}
else {
oma_debug_print("The first entry of the queue is NULL!\n");
}
if (queue.size < QUEUESIZE / 2) {
oma_debug_print("Signaling thread to start filling the queue");
pthread_cond_signal(&queuecond);
}
free(event);
}
unlock_mutex(&queuelock);
continue;
} /* End of timeout handling */
/* Start to loop through the file descriptors */
for (i = 0; i <= maxfd; i++) {
if (FD_ISSET(i, &readfds)) {
nready--;
/* New connection from a client */
if (i == listenfd) {
oma_debug_print("Recieved a new RTSP connection\n");
fflush(stdout);
if ((tempfd = accept(i, (struct sockaddr *)&remoteaddr, &addrlen)) == -1) {
if (errno != EWOULDBLOCK && errno != ECONNABORTED &&
errno != EPROTO && errno != EINTR) {
fatal_error("accept");
}
}
/* If we are already serving a client, close the new connection. Otherwise, continue. */
if (streamclient.state != NOCLIENT) {
printf("Another RTSP client tried to connect. Sorry, we can only serve one client at a time\n");
close (tempfd);
}
else {
streamclient.rtspfd = tempfd;
streamclient.state = CLICONNECTED;
maxfd = max(2, streamclient.rtspfd, maxfd);
FD_SET(streamclient.rtspfd, &masterfds);
}
}
/* Data from the media source */
else if (i == mediafd) {
switch (mediastate) {
case GETSENT:
/* Read ONLY the HTTP message from the socket and store the video size */
recvd = recv_all(i, msgbuf, BUFSIZE, MSG_PEEK);
temp = strstr((char *)msgbuf, "\r\n\r\n");
recvd = recv_all(i, msgbuf, (int)(temp + 4 - (char *)msgbuf), 0);
printf("Received HTTP response\n%s\n", msgbuf);
temp = strstr((char *)msgbuf, "Content-Length:");
sscanf(temp, "Content-Length: %d", &videosize);
videoleft = videosize;
mediastate = RECVTCP;
break;
case RECVTCP:
if ((recvd = recv_all(i, msgbuf, BUFSIZE, 0)) == 0) {
FD_CLR(i, &masterfds);
close(i);
oma_debug_print("Socket closed\n");
}
oma_debug_print("Received data from video source!\n");
writestr(videofd, msgbuf, recvd);
videoleft -= recvd;
if (videoleft <= 0) {
printf("Video download complete.\n");
FD_CLR(mediafd, &masterfds);
close(videofd);
close(mediafd);
media_downloaded = 1;
printf("Media socket closed\n");
/* Create the context and the queue filler thread parameter struct */
tinfo = (ThreadInfo *)malloc(sizeof(ThreadInfo));
initialize_context(&tinfo->ctx, "videotemp.mp4", &tinfo->videoIdx, &tinfo->audioIdx,
&tinfo->videoRate, &tinfo->audioRate, &sps, &spslen, &pps, &ppslen);
/* Launch the queue filler thread */
CHECK((pthread_create(&threadid, NULL, fill_queue, tinfo)) == 0);
pthread_detach(threadid);
/* Send the sprop-parameters before any other frames */
send_video_frame(sendbuf, create_sprop_frame(sps, spslen, 0),
streamclient.videofds[0], rtpseqno_video++);
send_video_frame(sendbuf, create_sprop_frame(pps, ppslen, 0),
streamclient.videofds[0], rtpseqno_video++);
g_free(sps);
g_free(pps);
lock_mutex(&queuelock);
push_timeout(&queue, 1000, CHECKMEDIASTATE);
unlock_mutex(&queuelock);
mediastate = STREAM;
}
break;
case STREAM:
/*
close(videofd);
close(mediafd);
close(listenfd);
quit = 1;
*/
break;
default:
break;
}
}
/* Data from a client ( i == streamclient.rtspfd) */
else {
oma_debug_print("Received data from rtspfd\n");
fflush(stdout);
if ((recvd = recv_all(i, msgbuf, BUFSIZE, 0)) == 0) {
FD_CLR(i, &masterfds);
close(i);
oma_debug_print("RTSP client closed the connection\n");
streamclient.state = NOCLIENT;
}
else {
oma_debug_print("%s", msgbuf);
parse_rtsp(&rtspmsg, msgbuf);
}
if (rtspmsg.type == TEARDOWN) {
/* Kill thread and empty queue */
lock_mutex(&queuelock);
pthread_cancel(threadid);
empty_queue(&queue);
sleep(1);
/* Reply with 200 OK */
sent = rtsp_teardown(&rtspmsg, sendbuf);
send_all(i, sendbuf, sent);
FD_CLR(i, &masterfds);
close(i);
close(streamclient.videofds[0]);
close(streamclient.videofds[1]);
close(streamclient.audiofds[0]);
close(streamclient.audiofds[1]);
printf("Closing AVFormatContext\n");
close_context(tinfo->ctx);
free(tinfo);
rtpseqno_video = (rand() % 1000000) + 7;
rtpseqno_audio = rtpseqno_video + 9;
init_client(&streamclient);
printf("Closing RTSP client sockets (RTP&RTCP)\n");
streamclient.state = NOCLIENT;
unlock_mutex(&queuelock);
pthread_cond_signal(&queuecond);
}
switch (streamclient.state) {
case CLICONNECTED:
if (rtspmsg.type == OPTIONS) {
sent = rtsp_options(&rtspmsg, &streamclient, sendbuf);
send_all(i, sendbuf, sent);
}
else if (rtspmsg.type == DESCRIBE) {
if (media_downloaded == 0) {
/* Start fetching the file from the server */
parse_url(url, urlhost, urlpath);
resolve_host(urlhost, "80", SOCK_STREAM, 0, &info);
mediafd = client_socket(info, 0);
FD_SET(mediafd, &masterfds);
maxfd = max(2, maxfd, mediafd);
/* Send the GET message */
http_get(url, msgbuf);
send_all(mediafd, msgbuf, strlen((char *)msgbuf));
mediastate = GETSENT;
}
else {
mediastate = STREAM;
}
/* Send the SDP without sprop-parameter-sets, those are sent
* later in-band */
streamclient.state = SDPSENT;
sent = rtsp_describe(&streamclient, sendbuf);
send_all(i, sendbuf, sent);
}
break;
case SDPSENT:
if (rtspmsg.type == SETUP) {
streamclient.setupsreceived++;
/* Open up the needed ports and bind them locally. The RTCP ports opened here
* are not really used by this application. */
write_remote_ip(tempstr, streamclient.rtspfd);
oma_debug_print("Remote IP: %s\n", tempstr);
if (streamclient.setupsreceived < 2) {
resolve_host(tempstr, rtspmsg.clirtpport, SOCK_DGRAM, 0, &info);
streamclient.audiofds[0] = client_socket(info, streamclient.server_rtp_audio_port);
resolve_host(tempstr, rtspmsg.clirtcpport, SOCK_DGRAM, 0, &info);
streamclient.audiofds[1] = client_socket(info, streamclient.server_rtcp_audio_port);
sent = rtsp_setup(&rtspmsg, &streamclient, sendbuf,
streamclient.server_rtp_audio_port, streamclient.server_rtcp_audio_port);
}
else {
resolve_host(tempstr, rtspmsg.clirtpport, SOCK_DGRAM, 0, &info);
streamclient.videofds[0] = client_socket(info, streamclient.server_rtp_video_port);
resolve_host(tempstr, rtspmsg.clirtcpport, SOCK_DGRAM, 0, &info);
streamclient.audiofds[1] = client_socket(info, streamclient.server_rtcp_video_port);
sent = rtsp_setup(&rtspmsg, &streamclient, sendbuf,
streamclient.server_rtp_video_port, streamclient.server_rtcp_video_port);
streamclient.state = SETUPCOMPLETE;
}
oma_debug_print("Sending setup response...\n");
send_all(i, sendbuf, sent);
}
break;
case SETUPCOMPLETE:
if (rtspmsg.type == PLAY) {
/* Respond to the PLAY request, and start sending dummy RTP packets
* to disable the client timeout */
sent = rtsp_play(&rtspmsg, sendbuf);
send_all(i, sendbuf, sent);
if (media_downloaded == 0) {
lock_mutex(&queuelock);
push_timeout(&queue, 100, CHECKMEDIASTATE);
unlock_mutex(&queuelock);
}
/* Media has already been once downloaded, initialize context and thread */
else {
tinfo = (ThreadInfo *)malloc(sizeof(ThreadInfo));
initialize_context(&tinfo->ctx, "videotemp.mp4", &tinfo->videoIdx, &tinfo->audioIdx,
&tinfo->videoRate, &tinfo->audioRate, &sps, &spslen, &pps, &ppslen);
/* Launch the queue filler thread */
CHECK((pthread_create(&threadid, NULL, fill_queue, tinfo)) == 0);
pthread_detach(threadid);
/* Send the sprop-parameters before any other frames */
send_video_frame(sendbuf, create_sprop_frame(sps, spslen, 0),
streamclient.videofds[0], rtpseqno_video++);
send_video_frame(sendbuf, create_sprop_frame(pps, ppslen, 0),
streamclient.videofds[0], rtpseqno_video++);
g_free(sps);
g_free(pps);
/* Dummy timeouts to start queue/timeout mechanism */
push_timeout(&queue, 100, CHECKMEDIASTATE);
push_timeout(&queue, 2000, CHECKMEDIASTATE);
}
}
break;
default:
break;
}
}
}
if (nready <= 0) break;
}
/* Set the timeout value again, since select will mess it up */
lock_mutex(&queuelock);
if (queue.size > 0) {
CHECK((gettimeofday(&timenow, NULL)) == 0);
*timeout = calculate_delta(&timenow, &queue.first->time);
/* oma_debug_print("Delta sec: %ld, Delta usec: %ld\n", timeout->tv_sec, timeout->tv_usec); */
if (timeout->tv_sec < 0) {
timeout->tv_sec = 0;
timeout->tv_usec = 0;
}
timeind = timeout;
}
else timeind = NULL;
unlock_mutex(&queuelock);
}
return 1;
}