3 * Copyright (c) 2002 Fabrice Bellard
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 #include "libavutil/avstring.h"
23 #include "libavutil/intreadwrite.h"
24 #include "libavutil/mathematics.h"
25 #include "libavutil/random_seed.h"
26 #include "libavutil/time.h"
31 #include "os_support.h"
38 static const struct RTSPStatusMessage {
39 enum RTSPStatusCode code;
41 } status_messages[] = {
42 { RTSP_STATUS_OK, "OK" },
43 { RTSP_STATUS_METHOD, "Method Not Allowed" },
44 { RTSP_STATUS_BANDWIDTH, "Not Enough Bandwidth" },
45 { RTSP_STATUS_SESSION, "Session Not Found" },
46 { RTSP_STATUS_STATE, "Method Not Valid in This State" },
47 { RTSP_STATUS_AGGREGATE, "Aggregate operation not allowed" },
48 { RTSP_STATUS_ONLY_AGGREGATE, "Only aggregate operation allowed" },
49 { RTSP_STATUS_TRANSPORT, "Unsupported transport" },
50 { RTSP_STATUS_INTERNAL, "Internal Server Error" },
51 { RTSP_STATUS_SERVICE, "Service Unavailable" },
52 { RTSP_STATUS_VERSION, "RTSP Version not supported" },
56 static int rtsp_read_close(AVFormatContext *s)
58 RTSPState *rt = s->priv_data;
60 if (!(rt->rtsp_flags & RTSP_FLAG_LISTEN))
61 ff_rtsp_send_cmd_async(s, "TEARDOWN", rt->control_uri, NULL);
63 ff_rtsp_close_streams(s);
64 ff_rtsp_close_connections(s);
66 rt->real_setup = NULL;
67 av_freep(&rt->real_setup_cache);
71 static inline int read_line(AVFormatContext *s, char *rbuf, const int rbufsize,
74 RTSPState *rt = s->priv_data;
80 ret = ffurl_read_complete(rt->rtsp_hd, rbuf + idx, 1);
82 return ret ? ret : AVERROR_EOF;
83 if (rbuf[idx] == '\r') {
85 } else if (rbuf[idx] == '\n') {
91 } while (idx < rbufsize);
92 av_log(s, AV_LOG_ERROR, "Message too long\n");
96 static int rtsp_send_reply(AVFormatContext *s, enum RTSPStatusCode code,
97 const char *extracontent, uint16_t seq)
99 RTSPState *rt = s->priv_data;
102 while (status_messages[index].code) {
103 if (status_messages[index].code == code) {
104 snprintf(message, sizeof(message), "RTSP/1.0 %d %s\r\n",
105 code, status_messages[index].message);
110 if (!status_messages[index].code)
111 return AVERROR(EINVAL);
112 av_strlcatf(message, sizeof(message), "CSeq: %d\r\n", seq);
113 av_strlcatf(message, sizeof(message), "Server: %s\r\n", LIBAVFORMAT_IDENT);
115 av_strlcat(message, extracontent, sizeof(message));
116 av_strlcat(message, "\r\n", sizeof(message));
117 av_log(s, AV_LOG_TRACE, "Sending response:\n%s", message);
118 ffurl_write(rt->rtsp_hd_out, message, strlen(message));
123 static inline int check_sessionid(AVFormatContext *s,
124 RTSPMessageHeader *request)
126 RTSPState *rt = s->priv_data;
127 unsigned char *session_id = rt->session_id;
128 if (!session_id[0]) {
129 av_log(s, AV_LOG_WARNING, "There is no session-id at the moment\n");
132 if (strcmp(session_id, request->session_id)) {
133 av_log(s, AV_LOG_ERROR, "Unexpected session-id %s\n",
134 request->session_id);
135 rtsp_send_reply(s, RTSP_STATUS_SESSION, NULL, request->seq);
136 return AVERROR_STREAM_NOT_FOUND;
141 static inline int rtsp_read_request(AVFormatContext *s,
142 RTSPMessageHeader *request,
145 RTSPState *rt = s->priv_data;
149 ret = read_line(s, rbuf, sizeof(rbuf), &rbuflen);
153 av_log(s, AV_LOG_TRACE, "Parsing[%d]: %s\n", rbuflen, rbuf);
154 ff_rtsp_parse_line(s, request, rbuf, rt, method);
156 } while (rbuflen > 0);
157 if (request->seq != rt->seq + 1) {
158 av_log(s, AV_LOG_ERROR, "Unexpected Sequence number %d\n",
160 return AVERROR(EINVAL);
162 if (rt->session_id[0] && strcmp(method, "OPTIONS")) {
163 ret = check_sessionid(s, request);
171 static int rtsp_read_announce(AVFormatContext *s)
173 RTSPState *rt = s->priv_data;
174 RTSPMessageHeader request = { 0 };
178 ret = rtsp_read_request(s, &request, "ANNOUNCE");
182 if (strcmp(request.content_type, "application/sdp")) {
183 av_log(s, AV_LOG_ERROR, "Unexpected content type %s\n",
184 request.content_type);
185 rtsp_send_reply(s, RTSP_STATUS_SERVICE, NULL, request.seq);
186 return AVERROR_OPTION_NOT_FOUND;
188 if (request.content_length && request.content_length < sizeof(sdp) - 1) {
190 if (ffurl_read_complete(rt->rtsp_hd, sdp, request.content_length)
191 < request.content_length) {
192 av_log(s, AV_LOG_ERROR,
193 "Unable to get complete SDP Description in ANNOUNCE\n");
194 rtsp_send_reply(s, RTSP_STATUS_INTERNAL, NULL, request.seq);
197 sdp[request.content_length] = '\0';
198 av_log(s, AV_LOG_VERBOSE, "SDP: %s\n", sdp);
199 ret = ff_sdp_parse(s, sdp);
202 rtsp_send_reply(s, RTSP_STATUS_OK, NULL, request.seq);
205 av_log(s, AV_LOG_ERROR,
206 "Content-Length header value exceeds sdp allocated buffer (4KB)\n");
207 rtsp_send_reply(s, RTSP_STATUS_INTERNAL,
208 "Content-Length exceeds buffer size", request.seq);
212 static int rtsp_read_options(AVFormatContext *s)
214 RTSPState *rt = s->priv_data;
215 RTSPMessageHeader request = { 0 };
218 /* Parsing headers */
219 ret = rtsp_read_request(s, &request, "OPTIONS");
224 rtsp_send_reply(s, RTSP_STATUS_OK,
225 "Public: ANNOUNCE, PAUSE, SETUP, TEARDOWN, RECORD\r\n",
230 static int rtsp_read_setup(AVFormatContext *s, char* host, char *controlurl)
232 RTSPState *rt = s->priv_data;
233 RTSPMessageHeader request = { 0 };
237 char responseheaders[1024];
239 int transportidx = 0;
242 ret = rtsp_read_request(s, &request, "SETUP");
246 if (!request.nb_transports) {
247 av_log(s, AV_LOG_ERROR, "No transport defined in SETUP\n");
248 return AVERROR_INVALIDDATA;
250 for (transportidx = 0; transportidx < request.nb_transports;
252 if (!request.transports[transportidx].mode_record ||
253 (request.transports[transportidx].lower_transport !=
254 RTSP_LOWER_TRANSPORT_UDP &&
255 request.transports[transportidx].lower_transport !=
256 RTSP_LOWER_TRANSPORT_TCP)) {
257 av_log(s, AV_LOG_ERROR, "mode=record/receive not set or transport"
258 " protocol not supported (yet)\n");
259 return AVERROR_INVALIDDATA;
262 if (request.nb_transports > 1)
263 av_log(s, AV_LOG_WARNING, "More than one transport not supported, "
264 "using first of all\n");
265 for (streamid = 0; streamid < rt->nb_rtsp_streams; streamid++) {
266 if (!strcmp(rt->rtsp_streams[streamid]->control_url,
270 if (streamid == rt->nb_rtsp_streams) {
271 av_log(s, AV_LOG_ERROR, "Unable to find requested track\n");
272 return AVERROR_STREAM_NOT_FOUND;
274 rtsp_st = rt->rtsp_streams[streamid];
275 localport = rt->rtp_port_min;
277 if (request.transports[0].lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
278 rt->lower_transport = RTSP_LOWER_TRANSPORT_TCP;
279 if ((ret = ff_rtsp_open_transport_ctx(s, rtsp_st))) {
280 rtsp_send_reply(s, RTSP_STATUS_TRANSPORT, NULL, request.seq);
283 rtsp_st->interleaved_min = request.transports[0].interleaved_min;
284 rtsp_st->interleaved_max = request.transports[0].interleaved_max;
285 snprintf(responseheaders, sizeof(responseheaders), "Transport: "
286 "RTP/AVP/TCP;unicast;mode=receive;interleaved=%d-%d"
287 "\r\n", request.transports[0].interleaved_min,
288 request.transports[0].interleaved_max);
291 AVDictionary *opts = NULL;
293 snprintf(buf, sizeof(buf), "%d", rt->buffer_size);
294 av_dict_set(&opts, "buffer_size", buf, 0);
295 ff_url_join(url, sizeof(url), "rtp", NULL, host, localport, NULL);
296 av_log(s, AV_LOG_TRACE, "Opening: %s", url);
297 ret = ffurl_open_whitelist(&rtsp_st->rtp_handle, url, AVIO_FLAG_READ_WRITE,
298 &s->interrupt_callback, &opts,
299 s->protocol_whitelist, s->protocol_blacklist, NULL);
303 } while (ret || localport > rt->rtp_port_max);
304 if (localport > rt->rtp_port_max) {
305 rtsp_send_reply(s, RTSP_STATUS_TRANSPORT, NULL, request.seq);
309 av_log(s, AV_LOG_TRACE, "Listening on: %d",
310 ff_rtp_get_local_rtp_port(rtsp_st->rtp_handle));
311 if ((ret = ff_rtsp_open_transport_ctx(s, rtsp_st))) {
312 rtsp_send_reply(s, RTSP_STATUS_TRANSPORT, NULL, request.seq);
316 localport = ff_rtp_get_local_rtp_port(rtsp_st->rtp_handle);
317 snprintf(responseheaders, sizeof(responseheaders), "Transport: "
318 "RTP/AVP/UDP;unicast;mode=receive;source=%s;"
319 "client_port=%d-%d;server_port=%d-%d\r\n",
320 host, request.transports[0].client_port_min,
321 request.transports[0].client_port_max, localport,
325 /* Establish sessionid if not previously set */
326 /* Put this in a function? */
327 /* RFC 2326: session id must be at least 8 digits */
328 while (strlen(rt->session_id) < 8)
329 av_strlcatf(rt->session_id, 512, "%u", av_get_random_seed());
331 av_strlcatf(responseheaders, sizeof(responseheaders), "Session: %s\r\n",
334 rtsp_send_reply(s, RTSP_STATUS_OK, responseheaders, request.seq);
336 rt->state = RTSP_STATE_PAUSED;
340 static int rtsp_read_record(AVFormatContext *s)
342 RTSPState *rt = s->priv_data;
343 RTSPMessageHeader request = { 0 };
345 char responseheaders[1024];
347 ret = rtsp_read_request(s, &request, "RECORD");
350 ret = check_sessionid(s, &request);
354 snprintf(responseheaders, sizeof(responseheaders), "Session: %s\r\n",
356 rtsp_send_reply(s, RTSP_STATUS_OK, responseheaders, request.seq);
358 rt->state = RTSP_STATE_STREAMING;
362 static inline int parse_command_line(AVFormatContext *s, const char *line,
363 int linelen, char *uri, int urisize,
364 char *method, int methodsize,
365 enum RTSPMethod *methodcode)
367 RTSPState *rt = s->priv_data;
368 const char *linept, *searchlinept;
369 linept = strchr(line, ' ');
372 av_log(s, AV_LOG_ERROR, "Error parsing method string\n");
373 return AVERROR_INVALIDDATA;
376 if (linept - line > methodsize - 1) {
377 av_log(s, AV_LOG_ERROR, "Method string too long\n");
380 memcpy(method, line, linept - line);
381 method[linept - line] = '\0';
383 if (!strcmp(method, "ANNOUNCE"))
384 *methodcode = ANNOUNCE;
385 else if (!strcmp(method, "OPTIONS"))
386 *methodcode = OPTIONS;
387 else if (!strcmp(method, "RECORD"))
388 *methodcode = RECORD;
389 else if (!strcmp(method, "SETUP"))
391 else if (!strcmp(method, "PAUSE"))
393 else if (!strcmp(method, "TEARDOWN"))
394 *methodcode = TEARDOWN;
396 *methodcode = UNKNOWN;
397 /* Check method with the state */
398 if (rt->state == RTSP_STATE_IDLE) {
399 if ((*methodcode != ANNOUNCE) && (*methodcode != OPTIONS)) {
400 av_log(s, AV_LOG_ERROR, "Unexpected command in Idle State %s\n",
402 return AVERROR_PROTOCOL_NOT_FOUND;
404 } else if (rt->state == RTSP_STATE_PAUSED) {
405 if ((*methodcode != OPTIONS) && (*methodcode != RECORD)
406 && (*methodcode != SETUP)) {
407 av_log(s, AV_LOG_ERROR, "Unexpected command in Paused State %s\n",
409 return AVERROR_PROTOCOL_NOT_FOUND;
411 } else if (rt->state == RTSP_STATE_STREAMING) {
412 if ((*methodcode != PAUSE) && (*methodcode != OPTIONS)
413 && (*methodcode != TEARDOWN)) {
414 av_log(s, AV_LOG_ERROR, "Unexpected command in Streaming State"
416 return AVERROR_PROTOCOL_NOT_FOUND;
419 av_log(s, AV_LOG_ERROR, "Unexpected State [%d]\n", rt->state);
423 searchlinept = strchr(linept, ' ');
425 av_log(s, AV_LOG_ERROR, "Error parsing message URI\n");
426 return AVERROR_INVALIDDATA;
428 if (searchlinept - linept > urisize - 1) {
429 av_log(s, AV_LOG_ERROR, "uri string length exceeded buffer size\n");
432 memcpy(uri, linept, searchlinept - linept);
433 uri[searchlinept - linept] = '\0';
434 if (strcmp(rt->control_uri, uri)) {
435 char host[128], path[512], auth[128];
437 char ctl_host[128], ctl_path[512], ctl_auth[128];
439 av_url_split(NULL, 0, auth, sizeof(auth), host, sizeof(host), &port,
440 path, sizeof(path), uri);
441 av_url_split(NULL, 0, ctl_auth, sizeof(ctl_auth), ctl_host,
442 sizeof(ctl_host), &ctl_port, ctl_path, sizeof(ctl_path),
444 if (strcmp(host, ctl_host))
445 av_log(s, AV_LOG_INFO, "Host %s differs from expected %s\n",
447 if (strcmp(path, ctl_path) && *methodcode != SETUP)
448 av_log(s, AV_LOG_WARNING, "WARNING: Path %s differs from expected"
449 " %s\n", path, ctl_path);
450 if (*methodcode == ANNOUNCE) {
451 av_log(s, AV_LOG_INFO,
452 "Updating control URI to %s\n", uri);
453 av_strlcpy(rt->control_uri, uri, sizeof(rt->control_uri));
457 linept = searchlinept + 1;
458 if (!av_strstart(linept, "RTSP/1.0", NULL)) {
459 av_log(s, AV_LOG_ERROR, "Error parsing protocol or version\n");
460 return AVERROR_PROTOCOL_NOT_FOUND;
465 int ff_rtsp_parse_streaming_commands(AVFormatContext *s)
467 RTSPState *rt = s->priv_data;
468 unsigned char rbuf[4096];
469 unsigned char method[10];
473 RTSPMessageHeader request = { 0 };
474 enum RTSPMethod methodcode;
476 ret = read_line(s, rbuf, sizeof(rbuf), &rbuflen);
479 ret = parse_command_line(s, rbuf, rbuflen, uri, sizeof(uri), method,
480 sizeof(method), &methodcode);
482 av_log(s, AV_LOG_ERROR, "RTSP: Unexpected Command\n");
486 ret = rtsp_read_request(s, &request, method);
490 if (methodcode == PAUSE) {
491 rt->state = RTSP_STATE_PAUSED;
492 ret = rtsp_send_reply(s, RTSP_STATUS_OK, NULL , request.seq);
493 // TODO: Missing date header in response
494 } else if (methodcode == OPTIONS) {
495 ret = rtsp_send_reply(s, RTSP_STATUS_OK,
496 "Public: ANNOUNCE, PAUSE, SETUP, TEARDOWN, "
497 "RECORD\r\n", request.seq);
498 } else if (methodcode == TEARDOWN) {
499 rt->state = RTSP_STATE_IDLE;
500 ret = rtsp_send_reply(s, RTSP_STATUS_OK, NULL , request.seq);
506 static int rtsp_read_play(AVFormatContext *s)
508 RTSPState *rt = s->priv_data;
509 RTSPMessageHeader reply1, *reply = &reply1;
513 av_log(s, AV_LOG_DEBUG, "hello state=%d\n", rt->state);
516 if (rt->lower_transport == RTSP_LOWER_TRANSPORT_UDP) {
517 for (i = 0; i < rt->nb_rtsp_streams; i++) {
518 RTSPStream *rtsp_st = rt->rtsp_streams[i];
519 /* Try to initialize the connection state in a
520 * potential NAT router by sending dummy packets.
521 * RTP/RTCP dummy packets are used for RDT, too.
523 if (rtsp_st->rtp_handle &&
524 !(rt->server_type == RTSP_SERVER_WMS && i > 1))
525 ff_rtp_send_punch_packets(rtsp_st->rtp_handle);
528 if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) {
529 if (rt->transport == RTSP_TRANSPORT_RTP) {
530 for (i = 0; i < rt->nb_rtsp_streams; i++) {
531 RTSPStream *rtsp_st = rt->rtsp_streams[i];
532 RTPDemuxContext *rtpctx = rtsp_st->transport_priv;
535 ff_rtp_reset_packet_queue(rtpctx);
536 rtpctx->last_rtcp_ntp_time = AV_NOPTS_VALUE;
537 rtpctx->first_rtcp_ntp_time = AV_NOPTS_VALUE;
538 rtpctx->base_timestamp = 0;
539 rtpctx->timestamp = 0;
540 rtpctx->unwrapped_timestamp = 0;
541 rtpctx->rtcp_ts_offset = 0;
544 if (rt->state == RTSP_STATE_PAUSED) {
547 snprintf(cmd, sizeof(cmd),
548 "Range: npt=%"PRId64".%03"PRId64"-\r\n",
549 rt->seek_timestamp / AV_TIME_BASE,
550 rt->seek_timestamp / (AV_TIME_BASE / 1000) % 1000);
552 ff_rtsp_send_cmd(s, "PLAY", rt->control_uri, cmd, reply, NULL);
553 if (reply->status_code != RTSP_STATUS_OK) {
554 return ff_rtsp_averror(reply->status_code, -1);
556 if (rt->transport == RTSP_TRANSPORT_RTP &&
557 reply->range_start != AV_NOPTS_VALUE) {
558 for (i = 0; i < rt->nb_rtsp_streams; i++) {
559 RTSPStream *rtsp_st = rt->rtsp_streams[i];
560 RTPDemuxContext *rtpctx = rtsp_st->transport_priv;
562 if (!rtpctx || rtsp_st->stream_index < 0)
565 st = s->streams[rtsp_st->stream_index];
566 rtpctx->range_start_offset =
567 av_rescale_q(reply->range_start, AV_TIME_BASE_Q,
572 rt->state = RTSP_STATE_STREAMING;
576 /* pause the stream */
577 static int rtsp_read_pause(AVFormatContext *s)
579 RTSPState *rt = s->priv_data;
580 RTSPMessageHeader reply1, *reply = &reply1;
582 if (rt->state != RTSP_STATE_STREAMING)
584 else if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) {
585 ff_rtsp_send_cmd(s, "PAUSE", rt->control_uri, NULL, reply, NULL);
586 if (reply->status_code != RTSP_STATUS_OK) {
587 return ff_rtsp_averror(reply->status_code, -1);
590 rt->state = RTSP_STATE_PAUSED;
594 int ff_rtsp_setup_input_streams(AVFormatContext *s, RTSPMessageHeader *reply)
596 RTSPState *rt = s->priv_data;
598 unsigned char *content = NULL;
601 /* describe the stream */
602 snprintf(cmd, sizeof(cmd),
603 "Accept: application/sdp\r\n");
604 if (rt->server_type == RTSP_SERVER_REAL) {
606 * The Require: attribute is needed for proper streaming from
610 "Require: com.real.retain-entity-for-setup\r\n",
613 ff_rtsp_send_cmd(s, "DESCRIBE", rt->control_uri, cmd, reply, &content);
614 if (reply->status_code != RTSP_STATUS_OK) {
616 return ff_rtsp_averror(reply->status_code, AVERROR_INVALIDDATA);
619 return AVERROR_INVALIDDATA;
621 av_log(s, AV_LOG_VERBOSE, "SDP:\n%s\n", content);
622 /* now we got the SDP description, we parse it */
623 ret = ff_sdp_parse(s, (const char *)content);
631 static int rtsp_listen(AVFormatContext *s)
633 RTSPState *rt = s->priv_data;
634 char proto[128], host[128], path[512], auth[128];
637 int default_port = RTSP_DEFAULT_PORT;
639 const char *lower_proto = "tcp";
640 unsigned char rbuf[4096];
641 unsigned char method[10];
644 enum RTSPMethod methodcode;
646 /* extract hostname and port */
647 av_url_split(proto, sizeof(proto), auth, sizeof(auth), host, sizeof(host),
648 &port, path, sizeof(path), s->filename);
650 /* ff_url_join. No authorization by now (NULL) */
651 ff_url_join(rt->control_uri, sizeof(rt->control_uri), proto, NULL, host,
654 if (!strcmp(proto, "rtsps")) {
656 default_port = RTSPS_DEFAULT_PORT;
662 /* Create TCP connection */
663 ff_url_join(tcpname, sizeof(tcpname), lower_proto, NULL, host, port,
664 "?listen&listen_timeout=%d", rt->initial_timeout * 1000);
666 if (ret = ffurl_open_whitelist(&rt->rtsp_hd, tcpname, AVIO_FLAG_READ_WRITE,
667 &s->interrupt_callback, NULL,
668 s->protocol_whitelist, s->protocol_blacklist, NULL)) {
669 av_log(s, AV_LOG_ERROR, "Unable to open RTSP for listening\n");
672 rt->state = RTSP_STATE_IDLE;
673 rt->rtsp_hd_out = rt->rtsp_hd;
674 for (;;) { /* Wait for incoming RTSP messages */
675 ret = read_line(s, rbuf, sizeof(rbuf), &rbuflen);
678 ret = parse_command_line(s, rbuf, rbuflen, uri, sizeof(uri), method,
679 sizeof(method), &methodcode);
681 av_log(s, AV_LOG_ERROR, "RTSP: Unexpected Command\n");
685 if (methodcode == ANNOUNCE) {
686 ret = rtsp_read_announce(s);
687 rt->state = RTSP_STATE_PAUSED;
688 } else if (methodcode == OPTIONS) {
689 ret = rtsp_read_options(s);
690 } else if (methodcode == RECORD) {
691 ret = rtsp_read_record(s);
693 return 0; // We are ready for streaming
694 } else if (methodcode == SETUP)
695 ret = rtsp_read_setup(s, host, uri);
697 ffurl_close(rt->rtsp_hd);
698 return AVERROR_INVALIDDATA;
704 static int rtsp_probe(AVProbeData *p)
707 #if CONFIG_TLS_PROTOCOL
708 av_strstart(p->filename, "rtsps:", NULL) ||
710 av_strstart(p->filename, "rtsp:", NULL))
711 return AVPROBE_SCORE_MAX;
715 static int rtsp_read_header(AVFormatContext *s)
717 RTSPState *rt = s->priv_data;
720 if (rt->initial_timeout > 0)
721 rt->rtsp_flags |= RTSP_FLAG_LISTEN;
723 if (rt->rtsp_flags & RTSP_FLAG_LISTEN) {
724 ret = rtsp_listen(s);
728 ret = ff_rtsp_connect(s);
732 rt->real_setup_cache = !s->nb_streams ? NULL :
733 av_mallocz_array(s->nb_streams, 2 * sizeof(*rt->real_setup_cache));
734 if (!rt->real_setup_cache && s->nb_streams)
735 return AVERROR(ENOMEM);
736 rt->real_setup = rt->real_setup_cache + s->nb_streams;
738 if (rt->initial_pause) {
739 /* do not start immediately */
741 if ((ret = rtsp_read_play(s)) < 0) {
742 ff_rtsp_close_streams(s);
743 ff_rtsp_close_connections(s);
752 int ff_rtsp_tcp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
753 uint8_t *buf, int buf_size)
755 RTSPState *rt = s->priv_data;
759 av_log(s, AV_LOG_TRACE, "tcp_read_packet:\n");
762 RTSPMessageHeader reply;
764 ret = ff_rtsp_read_reply(s, &reply, NULL, 1, NULL);
767 if (ret == 1) /* received '$' */
769 /* XXX: parse message */
770 if (rt->state != RTSP_STATE_STREAMING)
773 ret = ffurl_read_complete(rt->rtsp_hd, buf, 3);
777 len = AV_RB16(buf + 1);
778 av_log(s, AV_LOG_TRACE, "id=%d len=%d\n", id, len);
779 if (len > buf_size || len < 8)
782 ret = ffurl_read_complete(rt->rtsp_hd, buf, len);
785 if (rt->transport == RTSP_TRANSPORT_RDT &&
786 ff_rdt_parse_header(buf, len, &id, NULL, NULL, NULL, NULL) < 0)
789 /* find the matching stream */
790 for (i = 0; i < rt->nb_rtsp_streams; i++) {
791 rtsp_st = rt->rtsp_streams[i];
792 if (id >= rtsp_st->interleaved_min &&
793 id <= rtsp_st->interleaved_max)
802 static int resetup_tcp(AVFormatContext *s)
804 RTSPState *rt = s->priv_data;
808 av_url_split(NULL, 0, NULL, 0, host, sizeof(host), &port, NULL, 0,
810 ff_rtsp_undo_setup(s, 0);
811 return ff_rtsp_make_setup_request(s, host, port, RTSP_LOWER_TRANSPORT_TCP,
815 static int rtsp_read_packet(AVFormatContext *s, AVPacket *pkt)
817 RTSPState *rt = s->priv_data;
819 RTSPMessageHeader reply1, *reply = &reply1;
823 if (rt->server_type == RTSP_SERVER_REAL) {
826 for (i = 0; i < s->nb_streams; i++)
827 rt->real_setup[i] = s->streams[i]->discard;
829 if (!rt->need_subscription) {
830 if (memcmp (rt->real_setup, rt->real_setup_cache,
831 sizeof(enum AVDiscard) * s->nb_streams)) {
832 snprintf(cmd, sizeof(cmd),
833 "Unsubscribe: %s\r\n",
834 rt->last_subscription);
835 ff_rtsp_send_cmd(s, "SET_PARAMETER", rt->control_uri,
837 if (reply->status_code != RTSP_STATUS_OK)
838 return ff_rtsp_averror(reply->status_code, AVERROR_INVALIDDATA);
839 rt->need_subscription = 1;
843 if (rt->need_subscription) {
844 int r, rule_nr, first = 1;
846 memcpy(rt->real_setup_cache, rt->real_setup,
847 sizeof(enum AVDiscard) * s->nb_streams);
848 rt->last_subscription[0] = 0;
850 snprintf(cmd, sizeof(cmd),
852 for (i = 0; i < rt->nb_rtsp_streams; i++) {
854 for (r = 0; r < s->nb_streams; r++) {
855 if (s->streams[r]->id == i) {
856 if (s->streams[r]->discard != AVDISCARD_ALL) {
858 av_strlcat(rt->last_subscription, ",",
859 sizeof(rt->last_subscription));
860 ff_rdt_subscribe_rule(
861 rt->last_subscription,
862 sizeof(rt->last_subscription), i, rule_nr);
869 av_strlcatf(cmd, sizeof(cmd), "%s\r\n", rt->last_subscription);
870 ff_rtsp_send_cmd(s, "SET_PARAMETER", rt->control_uri,
872 if (reply->status_code != RTSP_STATUS_OK)
873 return ff_rtsp_averror(reply->status_code, AVERROR_INVALIDDATA);
874 rt->need_subscription = 0;
876 if (rt->state == RTSP_STATE_STREAMING)
881 ret = ff_rtsp_fetch_packet(s, pkt);
883 if (ret == AVERROR(ETIMEDOUT) && !rt->packets) {
884 if (rt->lower_transport == RTSP_LOWER_TRANSPORT_UDP &&
885 rt->lower_transport_mask & (1 << RTSP_LOWER_TRANSPORT_TCP)) {
886 RTSPMessageHeader reply1, *reply = &reply1;
887 av_log(s, AV_LOG_WARNING, "UDP timeout, retrying with TCP\n");
888 if (rtsp_read_pause(s) != 0)
890 // TEARDOWN is required on Real-RTSP, but might make
891 // other servers close the connection.
892 if (rt->server_type == RTSP_SERVER_REAL)
893 ff_rtsp_send_cmd(s, "TEARDOWN", rt->control_uri, NULL,
895 rt->session_id[0] = '\0';
896 if (resetup_tcp(s) == 0) {
897 rt->state = RTSP_STATE_IDLE;
898 rt->need_subscription = 1;
899 if (rtsp_read_play(s) != 0)
909 if (!(rt->rtsp_flags & RTSP_FLAG_LISTEN)) {
910 /* send dummy request to keep TCP connection alive */
911 if ((av_gettime_relative() - rt->last_cmd_time) / 1000000 >= rt->timeout / 2 ||
912 rt->auth_state.stale) {
913 if (rt->server_type == RTSP_SERVER_WMS ||
914 (rt->server_type != RTSP_SERVER_REAL &&
915 rt->get_parameter_supported)) {
916 ff_rtsp_send_cmd_async(s, "GET_PARAMETER", rt->control_uri, NULL);
918 ff_rtsp_send_cmd_async(s, "OPTIONS", rt->control_uri, NULL);
920 /* The stale flag should be reset when creating the auth response in
921 * ff_rtsp_send_cmd_async, but reset it here just in case we never
922 * called the auth code (if we didn't have any credentials set). */
923 rt->auth_state.stale = 0;
930 static int rtsp_read_seek(AVFormatContext *s, int stream_index,
931 int64_t timestamp, int flags)
933 RTSPState *rt = s->priv_data;
936 rt->seek_timestamp = av_rescale_q(timestamp,
937 s->streams[stream_index]->time_base,
941 case RTSP_STATE_IDLE:
943 case RTSP_STATE_STREAMING:
944 if ((ret = rtsp_read_pause(s)) != 0)
946 rt->state = RTSP_STATE_SEEKING;
947 if ((ret = rtsp_read_play(s)) != 0)
950 case RTSP_STATE_PAUSED:
951 rt->state = RTSP_STATE_IDLE;
957 static const AVClass rtsp_demuxer_class = {
958 .class_name = "RTSP demuxer",
959 .item_name = av_default_item_name,
960 .option = ff_rtsp_options,
961 .version = LIBAVUTIL_VERSION_INT,
964 AVInputFormat ff_rtsp_demuxer = {
966 .long_name = NULL_IF_CONFIG_SMALL("RTSP input"),
967 .priv_data_size = sizeof(RTSPState),
968 .read_probe = rtsp_probe,
969 .read_header = rtsp_read_header,
970 .read_packet = rtsp_read_packet,
971 .read_close = rtsp_read_close,
972 .read_seek = rtsp_read_seek,
973 .flags = AVFMT_NOFILE,
974 .read_play = rtsp_read_play,
975 .read_pause = rtsp_read_pause,
976 .priv_class = &rtsp_demuxer_class,