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"
37 static const struct RTSPStatusMessage {
38 enum RTSPStatusCode code;
40 } status_messages[] = {
41 { RTSP_STATUS_OK, "OK" },
42 { RTSP_STATUS_METHOD, "Method Not Allowed" },
43 { RTSP_STATUS_BANDWIDTH, "Not Enough Bandwidth" },
44 { RTSP_STATUS_SESSION, "Session Not Found" },
45 { RTSP_STATUS_STATE, "Method Not Valid in This State" },
46 { RTSP_STATUS_AGGREGATE, "Aggregate operation not allowed" },
47 { RTSP_STATUS_ONLY_AGGREGATE, "Only aggregate operation allowed" },
48 { RTSP_STATUS_TRANSPORT, "Unsupported transport" },
49 { RTSP_STATUS_INTERNAL, "Internal Server Error" },
50 { RTSP_STATUS_SERVICE, "Service Unavailable" },
51 { RTSP_STATUS_VERSION, "RTSP Version not supported" },
55 static int rtsp_read_close(AVFormatContext *s)
57 RTSPState *rt = s->priv_data;
59 if (!(rt->rtsp_flags & RTSP_FLAG_LISTEN))
60 ff_rtsp_send_cmd_async(s, "TEARDOWN", rt->control_uri, NULL);
62 ff_rtsp_close_streams(s);
63 ff_rtsp_close_connections(s);
65 rt->real_setup = NULL;
66 av_freep(&rt->real_setup_cache);
70 static inline int read_line(AVFormatContext *s, char *rbuf, const int rbufsize,
73 RTSPState *rt = s->priv_data;
79 ret = ffurl_read_complete(rt->rtsp_hd, rbuf + idx, 1);
81 return ret ? ret : AVERROR_EOF;
82 if (rbuf[idx] == '\r') {
84 } else if (rbuf[idx] == '\n') {
90 } while (idx < rbufsize);
91 av_log(s, AV_LOG_ERROR, "Message too long\n");
95 static int rtsp_send_reply(AVFormatContext *s, enum RTSPStatusCode code,
96 const char *extracontent, uint16_t seq)
98 RTSPState *rt = s->priv_data;
101 while (status_messages[index].code) {
102 if (status_messages[index].code == code) {
103 snprintf(message, sizeof(message), "RTSP/1.0 %d %s\r\n",
104 code, status_messages[index].message);
109 if (!status_messages[index].code)
110 return AVERROR(EINVAL);
111 av_strlcatf(message, sizeof(message), "CSeq: %d\r\n", seq);
112 av_strlcatf(message, sizeof(message), "Server: %s\r\n", LIBAVFORMAT_IDENT);
114 av_strlcat(message, extracontent, sizeof(message));
115 av_strlcat(message, "\r\n", sizeof(message));
116 av_dlog(s, "Sending response:\n%s", message);
117 ffurl_write(rt->rtsp_hd_out, message, strlen(message));
122 static inline int check_sessionid(AVFormatContext *s,
123 RTSPMessageHeader *request)
125 RTSPState *rt = s->priv_data;
126 unsigned char *session_id = rt->session_id;
127 if (!session_id[0]) {
128 av_log(s, AV_LOG_WARNING, "There is no session-id at the moment\n");
131 if (strcmp(session_id, request->session_id)) {
132 av_log(s, AV_LOG_ERROR, "Unexpected session-id %s\n",
133 request->session_id);
134 rtsp_send_reply(s, RTSP_STATUS_SESSION, NULL, request->seq);
135 return AVERROR_STREAM_NOT_FOUND;
140 static inline int rtsp_read_request(AVFormatContext *s,
141 RTSPMessageHeader *request,
144 RTSPState *rt = s->priv_data;
148 ret = read_line(s, rbuf, sizeof(rbuf), &rbuflen);
152 av_dlog(s, "Parsing[%d]: %s\n", rbuflen, rbuf);
153 ff_rtsp_parse_line(request, rbuf, rt, method);
155 } while (rbuflen > 0);
156 if (request->seq != rt->seq + 1) {
157 av_log(s, AV_LOG_ERROR, "Unexpected Sequence number %d\n",
159 return AVERROR(EINVAL);
161 if (rt->session_id[0] && strcmp(method, "OPTIONS")) {
162 ret = check_sessionid(s, request);
170 static int rtsp_read_announce(AVFormatContext *s)
172 RTSPState *rt = s->priv_data;
173 RTSPMessageHeader request = { 0 };
177 ret = rtsp_read_request(s, &request, "ANNOUNCE");
181 if (strcmp(request.content_type, "application/sdp")) {
182 av_log(s, AV_LOG_ERROR, "Unexpected content type %s\n",
183 request.content_type);
184 rtsp_send_reply(s, RTSP_STATUS_SERVICE, NULL, request.seq);
185 return AVERROR_OPTION_NOT_FOUND;
187 if (request.content_length && request.content_length < sizeof(sdp) - 1) {
189 if (ffurl_read_complete(rt->rtsp_hd, sdp, request.content_length)
190 < request.content_length) {
191 av_log(s, AV_LOG_ERROR,
192 "Unable to get complete SDP Description in ANNOUNCE\n");
193 rtsp_send_reply(s, RTSP_STATUS_INTERNAL, NULL, request.seq);
196 sdp[request.content_length] = '\0';
197 av_log(s, AV_LOG_VERBOSE, "SDP: %s\n", sdp);
198 ret = ff_sdp_parse(s, sdp);
201 rtsp_send_reply(s, RTSP_STATUS_OK, NULL, request.seq);
204 av_log(s, AV_LOG_ERROR,
205 "Content-Length header value exceeds sdp allocated buffer (4KB)\n");
206 rtsp_send_reply(s, RTSP_STATUS_INTERNAL,
207 "Content-Length exceeds buffer size", request.seq);
211 static int rtsp_read_options(AVFormatContext *s)
213 RTSPState *rt = s->priv_data;
214 RTSPMessageHeader request = { 0 };
217 /* Parsing headers */
218 ret = rtsp_read_request(s, &request, "OPTIONS");
223 rtsp_send_reply(s, RTSP_STATUS_OK,
224 "Public: ANNOUNCE, PAUSE, SETUP, TEARDOWN, RECORD\r\n",
229 static int rtsp_read_setup(AVFormatContext *s, char* host, char *controlurl)
231 RTSPState *rt = s->priv_data;
232 RTSPMessageHeader request = { 0 };
236 char responseheaders[1024];
238 int transportidx = 0;
241 ret = rtsp_read_request(s, &request, "SETUP");
245 if (!request.nb_transports) {
246 av_log(s, AV_LOG_ERROR, "No transport defined in SETUP\n");
247 return AVERROR_INVALIDDATA;
249 for (transportidx = 0; transportidx < request.nb_transports;
251 if (!request.transports[transportidx].mode_record ||
252 (request.transports[transportidx].lower_transport !=
253 RTSP_LOWER_TRANSPORT_UDP &&
254 request.transports[transportidx].lower_transport !=
255 RTSP_LOWER_TRANSPORT_TCP)) {
256 av_log(s, AV_LOG_ERROR, "mode=record/receive not set or transport"
257 " protocol not supported (yet)\n");
258 return AVERROR_INVALIDDATA;
261 if (request.nb_transports > 1)
262 av_log(s, AV_LOG_WARNING, "More than one transport not supported, "
263 "using first of all\n");
264 for (streamid = 0; streamid < rt->nb_rtsp_streams; streamid++) {
265 if (!strcmp(rt->rtsp_streams[streamid]->control_url,
269 if (streamid == rt->nb_rtsp_streams) {
270 av_log(s, AV_LOG_ERROR, "Unable to find requested track\n");
271 return AVERROR_STREAM_NOT_FOUND;
273 rtsp_st = rt->rtsp_streams[streamid];
274 localport = rt->rtp_port_min;
276 if (request.transports[0].lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
277 rt->lower_transport = RTSP_LOWER_TRANSPORT_TCP;
278 if ((ret = ff_rtsp_open_transport_ctx(s, rtsp_st))) {
279 rtsp_send_reply(s, RTSP_STATUS_TRANSPORT, NULL, request.seq);
282 rtsp_st->interleaved_min = request.transports[0].interleaved_min;
283 rtsp_st->interleaved_max = request.transports[0].interleaved_max;
284 snprintf(responseheaders, sizeof(responseheaders), "Transport: "
285 "RTP/AVP/TCP;unicast;mode=receive;interleaved=%d-%d"
286 "\r\n", request.transports[0].interleaved_min,
287 request.transports[0].interleaved_max);
290 ff_url_join(url, sizeof(url), "rtp", NULL, host, localport, NULL);
291 av_dlog(s, "Opening: %s", url);
292 ret = ffurl_open(&rtsp_st->rtp_handle, url, AVIO_FLAG_READ_WRITE,
293 &s->interrupt_callback, NULL);
296 } while (ret || localport > rt->rtp_port_max);
297 if (localport > rt->rtp_port_max) {
298 rtsp_send_reply(s, RTSP_STATUS_TRANSPORT, NULL, request.seq);
302 av_dlog(s, "Listening on: %d",
303 ff_rtp_get_local_rtp_port(rtsp_st->rtp_handle));
304 if ((ret = ff_rtsp_open_transport_ctx(s, rtsp_st))) {
305 rtsp_send_reply(s, RTSP_STATUS_TRANSPORT, NULL, request.seq);
309 localport = ff_rtp_get_local_rtp_port(rtsp_st->rtp_handle);
310 snprintf(responseheaders, sizeof(responseheaders), "Transport: "
311 "RTP/AVP/UDP;unicast;mode=receive;source=%s;"
312 "client_port=%d-%d;server_port=%d-%d\r\n",
313 host, request.transports[0].client_port_min,
314 request.transports[0].client_port_max, localport,
318 /* Establish sessionid if not previously set */
319 /* Put this in a function? */
320 /* RFC 2326: session id must be at least 8 digits */
321 while (strlen(rt->session_id) < 8)
322 av_strlcatf(rt->session_id, 512, "%u", av_get_random_seed());
324 av_strlcatf(responseheaders, sizeof(responseheaders), "Session: %s\r\n",
327 rtsp_send_reply(s, RTSP_STATUS_OK, responseheaders, request.seq);
329 rt->state = RTSP_STATE_PAUSED;
333 static int rtsp_read_record(AVFormatContext *s)
335 RTSPState *rt = s->priv_data;
336 RTSPMessageHeader request = { 0 };
338 char responseheaders[1024];
340 ret = rtsp_read_request(s, &request, "RECORD");
343 ret = check_sessionid(s, &request);
347 snprintf(responseheaders, sizeof(responseheaders), "Session: %s\r\n",
349 rtsp_send_reply(s, RTSP_STATUS_OK, responseheaders, request.seq);
351 rt->state = RTSP_STATE_STREAMING;
355 static inline int parse_command_line(AVFormatContext *s, const char *line,
356 int linelen, char *uri, int urisize,
357 char *method, int methodsize,
358 enum RTSPMethod *methodcode)
360 RTSPState *rt = s->priv_data;
361 const char *linept, *searchlinept;
362 linept = strchr(line, ' ');
365 av_log(s, AV_LOG_ERROR, "Error parsing method string\n");
366 return AVERROR_INVALIDDATA;
369 if (linept - line > methodsize - 1) {
370 av_log(s, AV_LOG_ERROR, "Method string too long\n");
373 memcpy(method, line, linept - line);
374 method[linept - line] = '\0';
376 if (!strcmp(method, "ANNOUNCE"))
377 *methodcode = ANNOUNCE;
378 else if (!strcmp(method, "OPTIONS"))
379 *methodcode = OPTIONS;
380 else if (!strcmp(method, "RECORD"))
381 *methodcode = RECORD;
382 else if (!strcmp(method, "SETUP"))
384 else if (!strcmp(method, "PAUSE"))
386 else if (!strcmp(method, "TEARDOWN"))
387 *methodcode = TEARDOWN;
389 *methodcode = UNKNOWN;
390 /* Check method with the state */
391 if (rt->state == RTSP_STATE_IDLE) {
392 if ((*methodcode != ANNOUNCE) && (*methodcode != OPTIONS)) {
393 av_log(s, AV_LOG_ERROR, "Unexpected command in Idle State %s\n",
395 return AVERROR_PROTOCOL_NOT_FOUND;
397 } else if (rt->state == RTSP_STATE_PAUSED) {
398 if ((*methodcode != OPTIONS) && (*methodcode != RECORD)
399 && (*methodcode != SETUP)) {
400 av_log(s, AV_LOG_ERROR, "Unexpected command in Paused State %s\n",
402 return AVERROR_PROTOCOL_NOT_FOUND;
404 } else if (rt->state == RTSP_STATE_STREAMING) {
405 if ((*methodcode != PAUSE) && (*methodcode != OPTIONS)
406 && (*methodcode != TEARDOWN)) {
407 av_log(s, AV_LOG_ERROR, "Unexpected command in Streaming State"
409 return AVERROR_PROTOCOL_NOT_FOUND;
412 av_log(s, AV_LOG_ERROR, "Unexpected State [%d]\n", rt->state);
416 searchlinept = strchr(linept, ' ');
418 av_log(s, AV_LOG_ERROR, "Error parsing message URI\n");
419 return AVERROR_INVALIDDATA;
421 if (searchlinept - linept > urisize - 1) {
422 av_log(s, AV_LOG_ERROR, "uri string length exceeded buffer size\n");
425 memcpy(uri, linept, searchlinept - linept);
426 uri[searchlinept - linept] = '\0';
427 if (strcmp(rt->control_uri, uri)) {
428 char host[128], path[512], auth[128];
430 char ctl_host[128], ctl_path[512], ctl_auth[128];
432 av_url_split(NULL, 0, auth, sizeof(auth), host, sizeof(host), &port,
433 path, sizeof(path), uri);
434 av_url_split(NULL, 0, ctl_auth, sizeof(ctl_auth), ctl_host,
435 sizeof(ctl_host), &ctl_port, ctl_path, sizeof(ctl_path),
437 if (strcmp(host, ctl_host))
438 av_log(s, AV_LOG_INFO, "Host %s differs from expected %s\n",
440 if (strcmp(path, ctl_path) && *methodcode != SETUP)
441 av_log(s, AV_LOG_WARNING, "WARNING: Path %s differs from expected"
442 " %s\n", path, ctl_path);
443 if (*methodcode == ANNOUNCE) {
444 av_log(s, AV_LOG_INFO,
445 "Updating control URI to %s\n", uri);
446 av_strlcpy(rt->control_uri, uri, sizeof(rt->control_uri));
450 linept = searchlinept + 1;
451 if (!av_strstart(linept, "RTSP/1.0", NULL)) {
452 av_log(s, AV_LOG_ERROR, "Error parsing protocol or version\n");
453 return AVERROR_PROTOCOL_NOT_FOUND;
458 int ff_rtsp_parse_streaming_commands(AVFormatContext *s)
460 RTSPState *rt = s->priv_data;
461 unsigned char rbuf[4096];
462 unsigned char method[10];
466 RTSPMessageHeader request = { 0 };
467 enum RTSPMethod methodcode;
469 ret = read_line(s, rbuf, sizeof(rbuf), &rbuflen);
472 ret = parse_command_line(s, rbuf, rbuflen, uri, sizeof(uri), method,
473 sizeof(method), &methodcode);
475 av_log(s, AV_LOG_ERROR, "RTSP: Unexpected Command\n");
479 ret = rtsp_read_request(s, &request, method);
483 if (methodcode == PAUSE) {
484 rt->state = RTSP_STATE_PAUSED;
485 ret = rtsp_send_reply(s, RTSP_STATUS_OK, NULL , request.seq);
486 // TODO: Missing date header in response
487 } else if (methodcode == OPTIONS) {
488 ret = rtsp_send_reply(s, RTSP_STATUS_OK,
489 "Public: ANNOUNCE, PAUSE, SETUP, TEARDOWN, "
490 "RECORD\r\n", request.seq);
491 } else if (methodcode == TEARDOWN) {
492 rt->state = RTSP_STATE_IDLE;
493 ret = rtsp_send_reply(s, RTSP_STATUS_OK, NULL , request.seq);
499 static int rtsp_read_play(AVFormatContext *s)
501 RTSPState *rt = s->priv_data;
502 RTSPMessageHeader reply1, *reply = &reply1;
506 av_log(s, AV_LOG_DEBUG, "hello state=%d\n", rt->state);
509 if (rt->lower_transport == RTSP_LOWER_TRANSPORT_UDP) {
510 for (i = 0; i < rt->nb_rtsp_streams; i++) {
511 RTSPStream *rtsp_st = rt->rtsp_streams[i];
512 /* Try to initialize the connection state in a
513 * potential NAT router by sending dummy packets.
514 * RTP/RTCP dummy packets are used for RDT, too.
516 if (rtsp_st->rtp_handle &&
517 !(rt->server_type == RTSP_SERVER_WMS && i > 1))
518 ff_rtp_send_punch_packets(rtsp_st->rtp_handle);
521 if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) {
522 if (rt->transport == RTSP_TRANSPORT_RTP) {
523 for (i = 0; i < rt->nb_rtsp_streams; i++) {
524 RTSPStream *rtsp_st = rt->rtsp_streams[i];
525 RTPDemuxContext *rtpctx = rtsp_st->transport_priv;
528 ff_rtp_reset_packet_queue(rtpctx);
529 rtpctx->last_rtcp_ntp_time = AV_NOPTS_VALUE;
530 rtpctx->first_rtcp_ntp_time = AV_NOPTS_VALUE;
531 rtpctx->base_timestamp = 0;
532 rtpctx->timestamp = 0;
533 rtpctx->unwrapped_timestamp = 0;
534 rtpctx->rtcp_ts_offset = 0;
537 if (rt->state == RTSP_STATE_PAUSED) {
540 snprintf(cmd, sizeof(cmd),
541 "Range: npt=%"PRId64".%03"PRId64"-\r\n",
542 rt->seek_timestamp / AV_TIME_BASE,
543 rt->seek_timestamp / (AV_TIME_BASE / 1000) % 1000);
545 ff_rtsp_send_cmd(s, "PLAY", rt->control_uri, cmd, reply, NULL);
546 if (reply->status_code != RTSP_STATUS_OK) {
547 return ff_rtsp_averror(reply->status_code, -1);
549 if (rt->transport == RTSP_TRANSPORT_RTP &&
550 reply->range_start != AV_NOPTS_VALUE) {
551 for (i = 0; i < rt->nb_rtsp_streams; i++) {
552 RTSPStream *rtsp_st = rt->rtsp_streams[i];
553 RTPDemuxContext *rtpctx = rtsp_st->transport_priv;
555 if (!rtpctx || rtsp_st->stream_index < 0)
558 st = s->streams[rtsp_st->stream_index];
559 rtpctx->range_start_offset =
560 av_rescale_q(reply->range_start, AV_TIME_BASE_Q,
565 rt->state = RTSP_STATE_STREAMING;
569 /* pause the stream */
570 static int rtsp_read_pause(AVFormatContext *s)
572 RTSPState *rt = s->priv_data;
573 RTSPMessageHeader reply1, *reply = &reply1;
575 if (rt->state != RTSP_STATE_STREAMING)
577 else if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) {
578 ff_rtsp_send_cmd(s, "PAUSE", rt->control_uri, NULL, reply, NULL);
579 if (reply->status_code != RTSP_STATUS_OK) {
580 return ff_rtsp_averror(reply->status_code, -1);
583 rt->state = RTSP_STATE_PAUSED;
587 int ff_rtsp_setup_input_streams(AVFormatContext *s, RTSPMessageHeader *reply)
589 RTSPState *rt = s->priv_data;
591 unsigned char *content = NULL;
594 /* describe the stream */
595 snprintf(cmd, sizeof(cmd),
596 "Accept: application/sdp\r\n");
597 if (rt->server_type == RTSP_SERVER_REAL) {
599 * The Require: attribute is needed for proper streaming from
603 "Require: com.real.retain-entity-for-setup\r\n",
606 ff_rtsp_send_cmd(s, "DESCRIBE", rt->control_uri, cmd, reply, &content);
607 if (reply->status_code != RTSP_STATUS_OK) {
609 return ff_rtsp_averror(reply->status_code, AVERROR_INVALIDDATA);
612 return AVERROR_INVALIDDATA;
614 av_log(s, AV_LOG_VERBOSE, "SDP:\n%s\n", content);
615 /* now we got the SDP description, we parse it */
616 ret = ff_sdp_parse(s, (const char *)content);
624 static int rtsp_listen(AVFormatContext *s)
626 RTSPState *rt = s->priv_data;
627 char proto[128], host[128], path[512], auth[128];
630 int default_port = RTSP_DEFAULT_PORT;
632 const char *lower_proto = "tcp";
633 unsigned char rbuf[4096];
634 unsigned char method[10];
637 enum RTSPMethod methodcode;
639 /* extract hostname and port */
640 av_url_split(proto, sizeof(proto), auth, sizeof(auth), host, sizeof(host),
641 &port, path, sizeof(path), s->filename);
643 /* ff_url_join. No authorization by now (NULL) */
644 ff_url_join(rt->control_uri, sizeof(rt->control_uri), proto, NULL, host,
647 if (!strcmp(proto, "rtsps")) {
649 default_port = RTSPS_DEFAULT_PORT;
655 /* Create TCP connection */
656 ff_url_join(tcpname, sizeof(tcpname), lower_proto, NULL, host, port,
657 "?listen&listen_timeout=%d", rt->initial_timeout * 1000);
659 if (ret = ffurl_open(&rt->rtsp_hd, tcpname, AVIO_FLAG_READ_WRITE,
660 &s->interrupt_callback, NULL)) {
661 av_log(s, AV_LOG_ERROR, "Unable to open RTSP for listening\n");
664 rt->state = RTSP_STATE_IDLE;
665 rt->rtsp_hd_out = rt->rtsp_hd;
666 for (;;) { /* Wait for incoming RTSP messages */
667 ret = read_line(s, rbuf, sizeof(rbuf), &rbuflen);
670 ret = parse_command_line(s, rbuf, rbuflen, uri, sizeof(uri), method,
671 sizeof(method), &methodcode);
673 av_log(s, AV_LOG_ERROR, "RTSP: Unexpected Command\n");
677 if (methodcode == ANNOUNCE) {
678 ret = rtsp_read_announce(s);
679 rt->state = RTSP_STATE_PAUSED;
680 } else if (methodcode == OPTIONS) {
681 ret = rtsp_read_options(s);
682 } else if (methodcode == RECORD) {
683 ret = rtsp_read_record(s);
685 return 0; // We are ready for streaming
686 } else if (methodcode == SETUP)
687 ret = rtsp_read_setup(s, host, uri);
689 ffurl_close(rt->rtsp_hd);
690 return AVERROR_INVALIDDATA;
696 static int rtsp_probe(AVProbeData *p)
699 #if CONFIG_TLS_PROTOCOL
700 av_strstart(p->filename, "rtsps:", NULL) ||
702 av_strstart(p->filename, "rtsp:", NULL))
703 return AVPROBE_SCORE_MAX;
707 static int rtsp_read_header(AVFormatContext *s)
709 RTSPState *rt = s->priv_data;
712 if (rt->initial_timeout > 0)
713 rt->rtsp_flags |= RTSP_FLAG_LISTEN;
715 if (rt->rtsp_flags & RTSP_FLAG_LISTEN) {
716 ret = rtsp_listen(s);
720 ret = ff_rtsp_connect(s);
724 rt->real_setup_cache = !s->nb_streams ? NULL :
725 av_mallocz_array(s->nb_streams, 2 * sizeof(*rt->real_setup_cache));
726 if (!rt->real_setup_cache && s->nb_streams)
727 return AVERROR(ENOMEM);
728 rt->real_setup = rt->real_setup_cache + s->nb_streams;
730 if (rt->initial_pause) {
731 /* do not start immediately */
733 if ((ret = rtsp_read_play(s)) < 0) {
734 ff_rtsp_close_streams(s);
735 ff_rtsp_close_connections(s);
744 int ff_rtsp_tcp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
745 uint8_t *buf, int buf_size)
747 RTSPState *rt = s->priv_data;
751 av_dlog(s, "tcp_read_packet:\n");
754 RTSPMessageHeader reply;
756 ret = ff_rtsp_read_reply(s, &reply, NULL, 1, NULL);
759 if (ret == 1) /* received '$' */
761 /* XXX: parse message */
762 if (rt->state != RTSP_STATE_STREAMING)
765 ret = ffurl_read_complete(rt->rtsp_hd, buf, 3);
769 len = AV_RB16(buf + 1);
770 av_dlog(s, "id=%d len=%d\n", id, len);
771 if (len > buf_size || len < 8)
774 ret = ffurl_read_complete(rt->rtsp_hd, buf, len);
777 if (rt->transport == RTSP_TRANSPORT_RDT &&
778 ff_rdt_parse_header(buf, len, &id, NULL, NULL, NULL, NULL) < 0)
781 /* find the matching stream */
782 for (i = 0; i < rt->nb_rtsp_streams; i++) {
783 rtsp_st = rt->rtsp_streams[i];
784 if (id >= rtsp_st->interleaved_min &&
785 id <= rtsp_st->interleaved_max)
794 static int resetup_tcp(AVFormatContext *s)
796 RTSPState *rt = s->priv_data;
800 av_url_split(NULL, 0, NULL, 0, host, sizeof(host), &port, NULL, 0,
802 ff_rtsp_undo_setup(s, 0);
803 return ff_rtsp_make_setup_request(s, host, port, RTSP_LOWER_TRANSPORT_TCP,
807 static int rtsp_read_packet(AVFormatContext *s, AVPacket *pkt)
809 RTSPState *rt = s->priv_data;
811 RTSPMessageHeader reply1, *reply = &reply1;
815 if (rt->server_type == RTSP_SERVER_REAL) {
818 for (i = 0; i < s->nb_streams; i++)
819 rt->real_setup[i] = s->streams[i]->discard;
821 if (!rt->need_subscription) {
822 if (memcmp (rt->real_setup, rt->real_setup_cache,
823 sizeof(enum AVDiscard) * s->nb_streams)) {
824 snprintf(cmd, sizeof(cmd),
825 "Unsubscribe: %s\r\n",
826 rt->last_subscription);
827 ff_rtsp_send_cmd(s, "SET_PARAMETER", rt->control_uri,
829 if (reply->status_code != RTSP_STATUS_OK)
830 return ff_rtsp_averror(reply->status_code, AVERROR_INVALIDDATA);
831 rt->need_subscription = 1;
835 if (rt->need_subscription) {
836 int r, rule_nr, first = 1;
838 memcpy(rt->real_setup_cache, rt->real_setup,
839 sizeof(enum AVDiscard) * s->nb_streams);
840 rt->last_subscription[0] = 0;
842 snprintf(cmd, sizeof(cmd),
844 for (i = 0; i < rt->nb_rtsp_streams; i++) {
846 for (r = 0; r < s->nb_streams; r++) {
847 if (s->streams[r]->id == i) {
848 if (s->streams[r]->discard != AVDISCARD_ALL) {
850 av_strlcat(rt->last_subscription, ",",
851 sizeof(rt->last_subscription));
852 ff_rdt_subscribe_rule(
853 rt->last_subscription,
854 sizeof(rt->last_subscription), i, rule_nr);
861 av_strlcatf(cmd, sizeof(cmd), "%s\r\n", rt->last_subscription);
862 ff_rtsp_send_cmd(s, "SET_PARAMETER", rt->control_uri,
864 if (reply->status_code != RTSP_STATUS_OK)
865 return ff_rtsp_averror(reply->status_code, AVERROR_INVALIDDATA);
866 rt->need_subscription = 0;
868 if (rt->state == RTSP_STATE_STREAMING)
873 ret = ff_rtsp_fetch_packet(s, pkt);
875 if (ret == AVERROR(ETIMEDOUT) && !rt->packets) {
876 if (rt->lower_transport == RTSP_LOWER_TRANSPORT_UDP &&
877 rt->lower_transport_mask & (1 << RTSP_LOWER_TRANSPORT_TCP)) {
878 RTSPMessageHeader reply1, *reply = &reply1;
879 av_log(s, AV_LOG_WARNING, "UDP timeout, retrying with TCP\n");
880 if (rtsp_read_pause(s) != 0)
882 // TEARDOWN is required on Real-RTSP, but might make
883 // other servers close the connection.
884 if (rt->server_type == RTSP_SERVER_REAL)
885 ff_rtsp_send_cmd(s, "TEARDOWN", rt->control_uri, NULL,
887 rt->session_id[0] = '\0';
888 if (resetup_tcp(s) == 0) {
889 rt->state = RTSP_STATE_IDLE;
890 rt->need_subscription = 1;
891 if (rtsp_read_play(s) != 0)
901 if (!(rt->rtsp_flags & RTSP_FLAG_LISTEN)) {
902 /* send dummy request to keep TCP connection alive */
903 if ((av_gettime_relative() - rt->last_cmd_time) / 1000000 >= rt->timeout / 2 ||
904 rt->auth_state.stale) {
905 if (rt->server_type == RTSP_SERVER_WMS ||
906 (rt->server_type != RTSP_SERVER_REAL &&
907 rt->get_parameter_supported)) {
908 ff_rtsp_send_cmd_async(s, "GET_PARAMETER", rt->control_uri, NULL);
910 ff_rtsp_send_cmd_async(s, "OPTIONS", rt->control_uri, NULL);
912 /* The stale flag should be reset when creating the auth response in
913 * ff_rtsp_send_cmd_async, but reset it here just in case we never
914 * called the auth code (if we didn't have any credentials set). */
915 rt->auth_state.stale = 0;
922 static int rtsp_read_seek(AVFormatContext *s, int stream_index,
923 int64_t timestamp, int flags)
925 RTSPState *rt = s->priv_data;
928 rt->seek_timestamp = av_rescale_q(timestamp,
929 s->streams[stream_index]->time_base,
933 case RTSP_STATE_IDLE:
935 case RTSP_STATE_STREAMING:
936 if ((ret = rtsp_read_pause(s)) != 0)
938 rt->state = RTSP_STATE_SEEKING;
939 if ((ret = rtsp_read_play(s)) != 0)
942 case RTSP_STATE_PAUSED:
943 rt->state = RTSP_STATE_IDLE;
949 static const AVClass rtsp_demuxer_class = {
950 .class_name = "RTSP demuxer",
951 .item_name = av_default_item_name,
952 .option = ff_rtsp_options,
953 .version = LIBAVUTIL_VERSION_INT,
956 AVInputFormat ff_rtsp_demuxer = {
958 .long_name = NULL_IF_CONFIG_SMALL("RTSP input"),
959 .priv_data_size = sizeof(RTSPState),
960 .read_probe = rtsp_probe,
961 .read_header = rtsp_read_header,
962 .read_packet = rtsp_read_packet,
963 .read_close = rtsp_read_close,
964 .read_seek = rtsp_read_seek,
965 .flags = AVFMT_NOFILE,
966 .read_play = rtsp_read_play,
967 .read_pause = rtsp_read_pause,
968 .priv_class = &rtsp_demuxer_class,