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/base64.h"
23 #include "libavutil/avstring.h"
24 #include "libavutil/intreadwrite.h"
25 #include "libavutil/random_seed.h"
30 #include <sys/select.h>
35 #include "os_support.h"
41 #include "rtpdec_formats.h"
44 //#define DEBUG_RTP_TCP
46 #if LIBAVFORMAT_VERSION_INT < (53 << 16)
47 int rtsp_default_protocols = (1 << RTSP_LOWER_TRANSPORT_UDP);
50 /* Timeout values for socket select, in ms,
51 * and read_packet(), in seconds */
52 #define SELECT_TIMEOUT_MS 100
53 #define READ_PACKET_TIMEOUT_S 10
54 #define MAX_TIMEOUTS READ_PACKET_TIMEOUT_S * 1000 / SELECT_TIMEOUT_MS
55 #define SDP_MAX_SIZE 16384
57 static void get_word_until_chars(char *buf, int buf_size,
58 const char *sep, const char **pp)
64 p += strspn(p, SPACE_CHARS);
66 while (!strchr(sep, *p) && *p != '\0') {
67 if ((q - buf) < buf_size - 1)
76 static void get_word_sep(char *buf, int buf_size, const char *sep,
79 if (**pp == '/') (*pp)++;
80 get_word_until_chars(buf, buf_size, sep, pp);
83 static void get_word(char *buf, int buf_size, const char **pp)
85 get_word_until_chars(buf, buf_size, SPACE_CHARS, pp);
88 /* parse the rtpmap description: <codec_name>/<clock_rate>[/<other params>] */
89 static int sdp_parse_rtpmap(AVFormatContext *s,
90 AVCodecContext *codec, RTSPStream *rtsp_st,
91 int payload_type, const char *p)
98 /* Loop into AVRtpDynamicPayloadTypes[] and AVRtpPayloadTypes[] and
99 * see if we can handle this kind of payload.
100 * The space should normally not be there but some Real streams or
101 * particular servers ("RealServer Version 6.1.3.970", see issue 1658)
102 * have a trailing space. */
103 get_word_sep(buf, sizeof(buf), "/ ", &p);
104 if (payload_type >= RTP_PT_PRIVATE) {
105 RTPDynamicProtocolHandler *handler;
106 for (handler = RTPFirstDynamicPayloadHandler;
107 handler; handler = handler->next) {
108 if (!strcasecmp(buf, handler->enc_name) &&
109 codec->codec_type == handler->codec_type) {
110 codec->codec_id = handler->codec_id;
111 rtsp_st->dynamic_handler = handler;
113 rtsp_st->dynamic_protocol_context = handler->open();
118 /* We are in a standard case
119 * (from http://www.iana.org/assignments/rtp-parameters). */
120 /* search into AVRtpPayloadTypes[] */
121 codec->codec_id = ff_rtp_codec_id(buf, codec->codec_type);
124 c = avcodec_find_decoder(codec->codec_id);
130 get_word_sep(buf, sizeof(buf), "/", &p);
132 switch (codec->codec_type) {
133 case AVMEDIA_TYPE_AUDIO:
134 av_log(s, AV_LOG_DEBUG, "audio codec set to: %s\n", c_name);
135 codec->sample_rate = RTSP_DEFAULT_AUDIO_SAMPLERATE;
136 codec->channels = RTSP_DEFAULT_NB_AUDIO_CHANNELS;
138 codec->sample_rate = i;
139 get_word_sep(buf, sizeof(buf), "/", &p);
143 // TODO: there is a bug here; if it is a mono stream, and
144 // less than 22000Hz, faad upconverts to stereo and twice
145 // the frequency. No problem, but the sample rate is being
146 // set here by the sdp line. Patch on its way. (rdm)
148 av_log(s, AV_LOG_DEBUG, "audio samplerate set to: %i\n",
150 av_log(s, AV_LOG_DEBUG, "audio channels set to: %i\n",
153 case AVMEDIA_TYPE_VIDEO:
154 av_log(s, AV_LOG_DEBUG, "video codec set to: %s\n", c_name);
162 /* parse the attribute line from the fmtp a line of an sdp response. This
163 * is broken out as a function because it is used in rtp_h264.c, which is
165 int ff_rtsp_next_attr_and_value(const char **p, char *attr, int attr_size,
166 char *value, int value_size)
168 *p += strspn(*p, SPACE_CHARS);
170 get_word_sep(attr, attr_size, "=", p);
173 get_word_sep(value, value_size, ";", p);
181 /** Parse a string p in the form of Range:npt=xx-xx, and determine the start
183 * Used for seeking in the rtp stream.
185 static void rtsp_parse_range_npt(const char *p, int64_t *start, int64_t *end)
189 p += strspn(p, SPACE_CHARS);
190 if (!av_stristart(p, "npt=", &p))
193 *start = AV_NOPTS_VALUE;
194 *end = AV_NOPTS_VALUE;
196 get_word_sep(buf, sizeof(buf), "-", &p);
197 *start = parse_date(buf, 1);
200 get_word_sep(buf, sizeof(buf), "-", &p);
201 *end = parse_date(buf, 1);
203 // av_log(NULL, AV_LOG_DEBUG, "Range Start: %lld\n", *start);
204 // av_log(NULL, AV_LOG_DEBUG, "Range End: %lld\n", *end);
207 static int get_sockaddr(const char *buf, struct sockaddr_storage *sock)
209 struct addrinfo hints, *ai = NULL;
210 memset(&hints, 0, sizeof(hints));
211 hints.ai_flags = AI_NUMERICHOST;
212 if (getaddrinfo(buf, NULL, &hints, &ai))
214 memcpy(sock, ai->ai_addr, FFMIN(sizeof(*sock), ai->ai_addrlen));
219 typedef struct SDPParseState {
221 struct sockaddr_storage default_ip;
223 int skip_media; ///< set if an unknown m= line occurs
226 static void sdp_parse_line(AVFormatContext *s, SDPParseState *s1,
227 int letter, const char *buf)
229 RTSPState *rt = s->priv_data;
230 char buf1[64], st_type[64];
232 enum AVMediaType codec_type;
236 struct sockaddr_storage sdp_ip;
239 dprintf(s, "sdp: %c='%s'\n", letter, buf);
242 if (s1->skip_media && letter != 'm')
246 get_word(buf1, sizeof(buf1), &p);
247 if (strcmp(buf1, "IN") != 0)
249 get_word(buf1, sizeof(buf1), &p);
250 if (strcmp(buf1, "IP4") && strcmp(buf1, "IP6"))
252 get_word_sep(buf1, sizeof(buf1), "/", &p);
253 if (get_sockaddr(buf1, &sdp_ip))
258 get_word_sep(buf1, sizeof(buf1), "/", &p);
261 if (s->nb_streams == 0) {
262 s1->default_ip = sdp_ip;
263 s1->default_ttl = ttl;
265 st = s->streams[s->nb_streams - 1];
266 rtsp_st = st->priv_data;
267 rtsp_st->sdp_ip = sdp_ip;
268 rtsp_st->sdp_ttl = ttl;
272 av_metadata_set2(&s->metadata, "title", p, 0);
275 if (s->nb_streams == 0) {
276 av_metadata_set2(&s->metadata, "comment", p, 0);
283 get_word(st_type, sizeof(st_type), &p);
284 if (!strcmp(st_type, "audio")) {
285 codec_type = AVMEDIA_TYPE_AUDIO;
286 } else if (!strcmp(st_type, "video")) {
287 codec_type = AVMEDIA_TYPE_VIDEO;
288 } else if (!strcmp(st_type, "application")) {
289 codec_type = AVMEDIA_TYPE_DATA;
294 rtsp_st = av_mallocz(sizeof(RTSPStream));
297 rtsp_st->stream_index = -1;
298 dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st);
300 rtsp_st->sdp_ip = s1->default_ip;
301 rtsp_st->sdp_ttl = s1->default_ttl;
303 get_word(buf1, sizeof(buf1), &p); /* port */
304 rtsp_st->sdp_port = atoi(buf1);
306 get_word(buf1, sizeof(buf1), &p); /* protocol (ignored) */
308 /* XXX: handle list of formats */
309 get_word(buf1, sizeof(buf1), &p); /* format list */
310 rtsp_st->sdp_payload_type = atoi(buf1);
312 if (!strcmp(ff_rtp_enc_name(rtsp_st->sdp_payload_type), "MP2T")) {
313 /* no corresponding stream */
315 st = av_new_stream(s, 0);
318 st->priv_data = rtsp_st;
319 rtsp_st->stream_index = st->index;
320 st->codec->codec_type = codec_type;
321 if (rtsp_st->sdp_payload_type < RTP_PT_PRIVATE) {
322 /* if standard payload type, we can find the codec right now */
323 ff_rtp_get_codec_info(st->codec, rtsp_st->sdp_payload_type);
326 /* put a default control url */
327 av_strlcpy(rtsp_st->control_url, rt->control_uri,
328 sizeof(rtsp_st->control_url));
331 if (av_strstart(p, "control:", &p)) {
332 if (s->nb_streams == 0) {
333 if (!strncmp(p, "rtsp://", 7))
334 av_strlcpy(rt->control_uri, p,
335 sizeof(rt->control_uri));
338 /* get the control url */
339 st = s->streams[s->nb_streams - 1];
340 rtsp_st = st->priv_data;
342 /* XXX: may need to add full url resolution */
343 av_url_split(proto, sizeof(proto), NULL, 0, NULL, 0,
345 if (proto[0] == '\0') {
346 /* relative control URL */
347 if (rtsp_st->control_url[strlen(rtsp_st->control_url)-1]!='/')
348 av_strlcat(rtsp_st->control_url, "/",
349 sizeof(rtsp_st->control_url));
350 av_strlcat(rtsp_st->control_url, p,
351 sizeof(rtsp_st->control_url));
353 av_strlcpy(rtsp_st->control_url, p,
354 sizeof(rtsp_st->control_url));
356 } else if (av_strstart(p, "rtpmap:", &p) && s->nb_streams > 0) {
357 /* NOTE: rtpmap is only supported AFTER the 'm=' tag */
358 get_word(buf1, sizeof(buf1), &p);
359 payload_type = atoi(buf1);
360 st = s->streams[s->nb_streams - 1];
361 rtsp_st = st->priv_data;
362 sdp_parse_rtpmap(s, st->codec, rtsp_st, payload_type, p);
363 } else if (av_strstart(p, "fmtp:", &p) ||
364 av_strstart(p, "framesize:", &p)) {
365 /* NOTE: fmtp is only supported AFTER the 'a=rtpmap:xxx' tag */
366 // let dynamic protocol handlers have a stab at the line.
367 get_word(buf1, sizeof(buf1), &p);
368 payload_type = atoi(buf1);
369 for (i = 0; i < s->nb_streams; i++) {
371 rtsp_st = st->priv_data;
372 if (rtsp_st->sdp_payload_type == payload_type &&
373 rtsp_st->dynamic_handler &&
374 rtsp_st->dynamic_handler->parse_sdp_a_line)
375 rtsp_st->dynamic_handler->parse_sdp_a_line(s, i,
376 rtsp_st->dynamic_protocol_context, buf);
378 } else if (av_strstart(p, "range:", &p)) {
381 // this is so that seeking on a streamed file can work.
382 rtsp_parse_range_npt(p, &start, &end);
383 s->start_time = start;
384 /* AV_NOPTS_VALUE means live broadcast (and can't seek) */
385 s->duration = (end == AV_NOPTS_VALUE) ?
386 AV_NOPTS_VALUE : end - start;
387 } else if (av_strstart(p, "IsRealDataType:integer;",&p)) {
389 rt->transport = RTSP_TRANSPORT_RDT;
391 if (rt->server_type == RTSP_SERVER_WMS)
392 ff_wms_parse_sdp_a_line(s, p);
393 if (s->nb_streams > 0) {
394 if (rt->server_type == RTSP_SERVER_REAL)
395 ff_real_parse_sdp_a_line(s, s->nb_streams - 1, p);
397 rtsp_st = s->streams[s->nb_streams - 1]->priv_data;
398 if (rtsp_st->dynamic_handler &&
399 rtsp_st->dynamic_handler->parse_sdp_a_line)
400 rtsp_st->dynamic_handler->parse_sdp_a_line(s,
402 rtsp_st->dynamic_protocol_context, buf);
409 static int sdp_parse(AVFormatContext *s, const char *content)
413 /* Some SDP lines, particularly for Realmedia or ASF RTSP streams,
414 * contain long SDP lines containing complete ASF Headers (several
415 * kB) or arrays of MDPR (RM stream descriptor) headers plus
416 * "rulebooks" describing their properties. Therefore, the SDP line
419 * The Vorbis FMTP line can be up to 16KB - see xiph_parse_sdp_line
420 * in rtpdec_xiph.c. */
422 SDPParseState sdp_parse_state, *s1 = &sdp_parse_state;
424 memset(s1, 0, sizeof(SDPParseState));
427 p += strspn(p, SPACE_CHARS);
435 /* get the content */
437 while (*p != '\n' && *p != '\r' && *p != '\0') {
438 if ((q - buf) < sizeof(buf) - 1)
443 sdp_parse_line(s, s1, letter, buf);
445 while (*p != '\n' && *p != '\0')
453 /* close and free RTSP streams */
454 void ff_rtsp_close_streams(AVFormatContext *s)
456 RTSPState *rt = s->priv_data;
460 for (i = 0; i < rt->nb_rtsp_streams; i++) {
461 rtsp_st = rt->rtsp_streams[i];
463 if (rtsp_st->transport_priv) {
465 AVFormatContext *rtpctx = rtsp_st->transport_priv;
466 av_write_trailer(rtpctx);
467 if (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
469 url_close_dyn_buf(rtpctx->pb, &ptr);
472 url_fclose(rtpctx->pb);
474 av_metadata_free(&rtpctx->streams[0]->metadata);
475 av_metadata_free(&rtpctx->metadata);
476 av_free(rtpctx->streams[0]);
478 } else if (rt->transport == RTSP_TRANSPORT_RDT)
479 ff_rdt_parse_close(rtsp_st->transport_priv);
481 rtp_parse_close(rtsp_st->transport_priv);
483 if (rtsp_st->rtp_handle)
484 url_close(rtsp_st->rtp_handle);
485 if (rtsp_st->dynamic_handler && rtsp_st->dynamic_protocol_context)
486 rtsp_st->dynamic_handler->close(
487 rtsp_st->dynamic_protocol_context);
490 av_free(rt->rtsp_streams);
492 av_close_input_stream (rt->asf_ctx);
497 static void *rtsp_rtp_mux_open(AVFormatContext *s, AVStream *st,
500 RTSPState *rt = s->priv_data;
501 AVFormatContext *rtpctx;
503 AVOutputFormat *rtp_format = av_guess_format("rtp", NULL, NULL);
508 /* Allocate an AVFormatContext for each output stream */
509 rtpctx = avformat_alloc_context();
513 rtpctx->oformat = rtp_format;
514 if (!av_new_stream(rtpctx, 0)) {
518 /* Copy the max delay setting; the rtp muxer reads this. */
519 rtpctx->max_delay = s->max_delay;
520 /* Copy other stream parameters. */
521 rtpctx->streams[0]->sample_aspect_ratio = st->sample_aspect_ratio;
523 /* Set the synchronized start time. */
524 rtpctx->start_time_realtime = rt->start_time;
526 /* Remove the local codec, link to the original codec
527 * context instead, to give the rtp muxer access to
528 * codec parameters. */
529 av_free(rtpctx->streams[0]->codec);
530 rtpctx->streams[0]->codec = st->codec;
533 url_fdopen(&rtpctx->pb, handle);
535 url_open_dyn_packet_buf(&rtpctx->pb, RTSP_TCP_MAX_PACKET_SIZE);
536 ret = av_write_header(rtpctx);
540 url_fclose(rtpctx->pb);
543 url_close_dyn_buf(rtpctx->pb, &ptr);
546 av_free(rtpctx->streams[0]);
551 /* Copy the RTP AVStream timebase back to the original AVStream */
552 st->time_base = rtpctx->streams[0]->time_base;
556 static int rtsp_open_transport_ctx(AVFormatContext *s, RTSPStream *rtsp_st)
558 RTSPState *rt = s->priv_data;
561 /* open the RTP context */
562 if (rtsp_st->stream_index >= 0)
563 st = s->streams[rtsp_st->stream_index];
565 s->ctx_flags |= AVFMTCTX_NOHEADER;
568 rtsp_st->transport_priv = rtsp_rtp_mux_open(s, st, rtsp_st->rtp_handle);
569 /* Ownership of rtp_handle is passed to the rtp mux context */
570 rtsp_st->rtp_handle = NULL;
571 } else if (rt->transport == RTSP_TRANSPORT_RDT)
572 rtsp_st->transport_priv = ff_rdt_parse_open(s, st->index,
573 rtsp_st->dynamic_protocol_context,
574 rtsp_st->dynamic_handler);
576 rtsp_st->transport_priv = rtp_parse_open(s, st, rtsp_st->rtp_handle,
577 rtsp_st->sdp_payload_type);
579 if (!rtsp_st->transport_priv) {
580 return AVERROR(ENOMEM);
581 } else if (rt->transport != RTSP_TRANSPORT_RDT) {
582 if (rtsp_st->dynamic_handler) {
583 rtp_parse_set_dynamic_protocol(rtsp_st->transport_priv,
584 rtsp_st->dynamic_protocol_context,
585 rtsp_st->dynamic_handler);
592 #if CONFIG_RTSP_DEMUXER || CONFIG_RTSP_MUXER
593 static int rtsp_probe(AVProbeData *p)
595 if (av_strstart(p->filename, "rtsp:", NULL))
596 return AVPROBE_SCORE_MAX;
600 static void rtsp_parse_range(int *min_ptr, int *max_ptr, const char **pp)
606 p += strspn(p, SPACE_CHARS);
607 v = strtol(p, (char **)&p, 10);
611 v = strtol(p, (char **)&p, 10);
620 /* XXX: only one transport specification is parsed */
621 static void rtsp_parse_transport(RTSPMessageHeader *reply, const char *p)
623 char transport_protocol[16];
625 char lower_transport[16];
627 RTSPTransportField *th;
630 reply->nb_transports = 0;
633 p += strspn(p, SPACE_CHARS);
637 th = &reply->transports[reply->nb_transports];
639 get_word_sep(transport_protocol, sizeof(transport_protocol),
641 if (!strcasecmp (transport_protocol, "rtp")) {
642 get_word_sep(profile, sizeof(profile), "/;,", &p);
643 lower_transport[0] = '\0';
644 /* rtp/avp/<protocol> */
646 get_word_sep(lower_transport, sizeof(lower_transport),
649 th->transport = RTSP_TRANSPORT_RTP;
650 } else if (!strcasecmp (transport_protocol, "x-pn-tng") ||
651 !strcasecmp (transport_protocol, "x-real-rdt")) {
652 /* x-pn-tng/<protocol> */
653 get_word_sep(lower_transport, sizeof(lower_transport), "/;,", &p);
655 th->transport = RTSP_TRANSPORT_RDT;
657 if (!strcasecmp(lower_transport, "TCP"))
658 th->lower_transport = RTSP_LOWER_TRANSPORT_TCP;
660 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP;
664 /* get each parameter */
665 while (*p != '\0' && *p != ',') {
666 get_word_sep(parameter, sizeof(parameter), "=;,", &p);
667 if (!strcmp(parameter, "port")) {
670 rtsp_parse_range(&th->port_min, &th->port_max, &p);
672 } else if (!strcmp(parameter, "client_port")) {
675 rtsp_parse_range(&th->client_port_min,
676 &th->client_port_max, &p);
678 } else if (!strcmp(parameter, "server_port")) {
681 rtsp_parse_range(&th->server_port_min,
682 &th->server_port_max, &p);
684 } else if (!strcmp(parameter, "interleaved")) {
687 rtsp_parse_range(&th->interleaved_min,
688 &th->interleaved_max, &p);
690 } else if (!strcmp(parameter, "multicast")) {
691 if (th->lower_transport == RTSP_LOWER_TRANSPORT_UDP)
692 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP_MULTICAST;
693 } else if (!strcmp(parameter, "ttl")) {
696 th->ttl = strtol(p, (char **)&p, 10);
698 } else if (!strcmp(parameter, "destination")) {
701 get_word_sep(buf, sizeof(buf), ";,", &p);
702 get_sockaddr(buf, &th->destination);
705 while (*p != ';' && *p != '\0' && *p != ',')
713 reply->nb_transports++;
717 void ff_rtsp_parse_line(RTSPMessageHeader *reply, const char *buf,
718 HTTPAuthState *auth_state)
722 /* NOTE: we do case independent match for broken servers */
724 if (av_stristart(p, "Session:", &p)) {
726 get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p);
727 if (av_stristart(p, ";timeout=", &p) &&
728 (t = strtol(p, NULL, 10)) > 0) {
731 } else if (av_stristart(p, "Content-Length:", &p)) {
732 reply->content_length = strtol(p, NULL, 10);
733 } else if (av_stristart(p, "Transport:", &p)) {
734 rtsp_parse_transport(reply, p);
735 } else if (av_stristart(p, "CSeq:", &p)) {
736 reply->seq = strtol(p, NULL, 10);
737 } else if (av_stristart(p, "Range:", &p)) {
738 rtsp_parse_range_npt(p, &reply->range_start, &reply->range_end);
739 } else if (av_stristart(p, "RealChallenge1:", &p)) {
740 p += strspn(p, SPACE_CHARS);
741 av_strlcpy(reply->real_challenge, p, sizeof(reply->real_challenge));
742 } else if (av_stristart(p, "Server:", &p)) {
743 p += strspn(p, SPACE_CHARS);
744 av_strlcpy(reply->server, p, sizeof(reply->server));
745 } else if (av_stristart(p, "Notice:", &p) ||
746 av_stristart(p, "X-Notice:", &p)) {
747 reply->notice = strtol(p, NULL, 10);
748 } else if (av_stristart(p, "Location:", &p)) {
749 p += strspn(p, SPACE_CHARS);
750 av_strlcpy(reply->location, p , sizeof(reply->location));
751 } else if (av_stristart(p, "WWW-Authenticate:", &p) && auth_state) {
752 p += strspn(p, SPACE_CHARS);
753 ff_http_auth_handle_header(auth_state, "WWW-Authenticate", p);
754 } else if (av_stristart(p, "Authentication-Info:", &p) && auth_state) {
755 p += strspn(p, SPACE_CHARS);
756 ff_http_auth_handle_header(auth_state, "Authentication-Info", p);
760 /* skip a RTP/TCP interleaved packet */
761 void ff_rtsp_skip_packet(AVFormatContext *s)
763 RTSPState *rt = s->priv_data;
767 ret = url_read_complete(rt->rtsp_hd, buf, 3);
770 len = AV_RB16(buf + 1);
772 dprintf(s, "skipping RTP packet len=%d\n", len);
777 if (len1 > sizeof(buf))
779 ret = url_read_complete(rt->rtsp_hd, buf, len1);
786 int ff_rtsp_read_reply(AVFormatContext *s, RTSPMessageHeader *reply,
787 unsigned char **content_ptr,
788 int return_on_interleaved_data)
790 RTSPState *rt = s->priv_data;
791 char buf[4096], buf1[1024], *q;
794 int ret, content_length, line_count = 0;
795 unsigned char *content = NULL;
797 memset(reply, 0, sizeof(*reply));
799 /* parse reply (XXX: use buffers) */
800 rt->last_reply[0] = '\0';
804 ret = url_read_complete(rt->rtsp_hd, &ch, 1);
806 dprintf(s, "ret=%d c=%02x [%c]\n", ret, ch, ch);
813 /* XXX: only parse it if first char on line ? */
814 if (return_on_interleaved_data) {
817 ff_rtsp_skip_packet(s);
818 } else if (ch != '\r') {
819 if ((q - buf) < sizeof(buf) - 1)
825 dprintf(s, "line='%s'\n", buf);
827 /* test if last line */
831 if (line_count == 0) {
833 get_word(buf1, sizeof(buf1), &p);
834 get_word(buf1, sizeof(buf1), &p);
835 reply->status_code = atoi(buf1);
836 av_strlcpy(reply->reason, p, sizeof(reply->reason));
838 ff_rtsp_parse_line(reply, p, &rt->auth_state);
839 av_strlcat(rt->last_reply, p, sizeof(rt->last_reply));
840 av_strlcat(rt->last_reply, "\n", sizeof(rt->last_reply));
845 if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0')
846 av_strlcpy(rt->session_id, reply->session_id, sizeof(rt->session_id));
848 content_length = reply->content_length;
849 if (content_length > 0) {
850 /* leave some room for a trailing '\0' (useful for simple parsing) */
851 content = av_malloc(content_length + 1);
852 (void)url_read_complete(rt->rtsp_hd, content, content_length);
853 content[content_length] = '\0';
856 *content_ptr = content;
860 if (rt->seq != reply->seq) {
861 av_log(s, AV_LOG_WARNING, "CSeq %d expected, %d received.\n",
862 rt->seq, reply->seq);
866 if (reply->notice == 2101 /* End-of-Stream Reached */ ||
867 reply->notice == 2104 /* Start-of-Stream Reached */ ||
868 reply->notice == 2306 /* Continuous Feed Terminated */) {
869 rt->state = RTSP_STATE_IDLE;
870 } else if (reply->notice >= 4400 && reply->notice < 5500) {
871 return AVERROR(EIO); /* data or server error */
872 } else if (reply->notice == 2401 /* Ticket Expired */ ||
873 (reply->notice >= 5500 && reply->notice < 5600) /* end of term */ )
874 return AVERROR(EPERM);
879 int ff_rtsp_send_cmd_with_content_async(AVFormatContext *s,
880 const char *method, const char *url,
882 const unsigned char *send_content,
883 int send_content_length)
885 RTSPState *rt = s->priv_data;
886 char buf[4096], *out_buf;
887 char base64buf[AV_BASE64_SIZE(sizeof(buf))];
889 /* Add in RTSP headers */
892 snprintf(buf, sizeof(buf), "%s %s RTSP/1.0\r\n", method, url);
894 av_strlcat(buf, headers, sizeof(buf));
895 av_strlcatf(buf, sizeof(buf), "CSeq: %d\r\n", rt->seq);
896 if (rt->session_id[0] != '\0' && (!headers ||
897 !strstr(headers, "\nIf-Match:"))) {
898 av_strlcatf(buf, sizeof(buf), "Session: %s\r\n", rt->session_id);
901 char *str = ff_http_auth_create_response(&rt->auth_state,
902 rt->auth, url, method);
904 av_strlcat(buf, str, sizeof(buf));
907 if (send_content_length > 0 && send_content)
908 av_strlcatf(buf, sizeof(buf), "Content-Length: %d\r\n", send_content_length);
909 av_strlcat(buf, "\r\n", sizeof(buf));
911 /* base64 encode rtsp if tunneling */
912 if (rt->control_transport == RTSP_MODE_TUNNEL) {
913 av_base64_encode(base64buf, sizeof(base64buf), buf, strlen(buf));
917 dprintf(s, "Sending:\n%s--\n", buf);
919 url_write(rt->rtsp_hd_out, out_buf, strlen(out_buf));
920 if (send_content_length > 0 && send_content) {
921 if (rt->control_transport == RTSP_MODE_TUNNEL) {
922 av_log(s, AV_LOG_ERROR, "tunneling of RTSP requests "
923 "with content data not supported\n");
924 return AVERROR_PATCHWELCOME;
926 url_write(rt->rtsp_hd_out, send_content, send_content_length);
928 rt->last_cmd_time = av_gettime();
933 int ff_rtsp_send_cmd_async(AVFormatContext *s, const char *method,
934 const char *url, const char *headers)
936 return ff_rtsp_send_cmd_with_content_async(s, method, url, headers, NULL, 0);
939 int ff_rtsp_send_cmd(AVFormatContext *s, const char *method, const char *url,
940 const char *headers, RTSPMessageHeader *reply,
941 unsigned char **content_ptr)
943 return ff_rtsp_send_cmd_with_content(s, method, url, headers, reply,
944 content_ptr, NULL, 0);
947 int ff_rtsp_send_cmd_with_content(AVFormatContext *s,
948 const char *method, const char *url,
950 RTSPMessageHeader *reply,
951 unsigned char **content_ptr,
952 const unsigned char *send_content,
953 int send_content_length)
955 RTSPState *rt = s->priv_data;
956 HTTPAuthType cur_auth_type;
960 cur_auth_type = rt->auth_state.auth_type;
961 if ((ret = ff_rtsp_send_cmd_with_content_async(s, method, url, header,
963 send_content_length)))
966 if ((ret = ff_rtsp_read_reply(s, reply, content_ptr, 0) ) < 0)
969 if (reply->status_code == 401 && cur_auth_type == HTTP_AUTH_NONE &&
970 rt->auth_state.auth_type != HTTP_AUTH_NONE)
973 if (reply->status_code > 400){
974 av_log(s, AV_LOG_ERROR, "method %s failed: %d%s\n",
978 av_log(s, AV_LOG_DEBUG, "%s\n", rt->last_reply);
985 * @return 0 on success, <0 on error, 1 if protocol is unavailable.
987 static int make_setup_request(AVFormatContext *s, const char *host, int port,
988 int lower_transport, const char *real_challenge)
990 RTSPState *rt = s->priv_data;
991 int rtx, j, i, err, interleave = 0;
993 RTSPMessageHeader reply1, *reply = &reply1;
995 const char *trans_pref;
997 if (rt->transport == RTSP_TRANSPORT_RDT)
998 trans_pref = "x-pn-tng";
1000 trans_pref = "RTP/AVP";
1002 /* default timeout: 1 minute */
1005 /* for each stream, make the setup request */
1006 /* XXX: we assume the same server is used for the control of each
1009 for (j = RTSP_RTP_PORT_MIN, i = 0; i < rt->nb_rtsp_streams; ++i) {
1010 char transport[2048];
1013 * WMS serves all UDP data over a single connection, the RTX, which
1014 * isn't necessarily the first in the SDP but has to be the first
1015 * to be set up, else the second/third SETUP will fail with a 461.
1017 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP &&
1018 rt->server_type == RTSP_SERVER_WMS) {
1021 for (rtx = 0; rtx < rt->nb_rtsp_streams; rtx++) {
1022 int len = strlen(rt->rtsp_streams[rtx]->control_url);
1024 !strcmp(rt->rtsp_streams[rtx]->control_url + len - 4,
1028 if (rtx == rt->nb_rtsp_streams)
1029 return -1; /* no RTX found */
1030 rtsp_st = rt->rtsp_streams[rtx];
1032 rtsp_st = rt->rtsp_streams[i > rtx ? i : i - 1];
1034 rtsp_st = rt->rtsp_streams[i];
1037 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP) {
1040 if (rt->server_type == RTSP_SERVER_WMS && i > 1) {
1041 port = reply->transports[0].client_port_min;
1045 /* first try in specified port range */
1046 if (RTSP_RTP_PORT_MIN != 0) {
1047 while (j <= RTSP_RTP_PORT_MAX) {
1048 ff_url_join(buf, sizeof(buf), "rtp", NULL, host, -1,
1049 "?localport=%d", j);
1050 /* we will use two ports per rtp stream (rtp and rtcp) */
1052 if (url_open(&rtsp_st->rtp_handle, buf, URL_RDWR) == 0)
1058 /* then try on any port */
1059 if (url_open(&rtsp_st->rtp_handle, "rtp://", URL_RDONLY) < 0) {
1060 err = AVERROR_INVALIDDATA;
1066 port = rtp_get_local_port(rtsp_st->rtp_handle);
1068 snprintf(transport, sizeof(transport) - 1,
1069 "%s/UDP;", trans_pref);
1070 if (rt->server_type != RTSP_SERVER_REAL)
1071 av_strlcat(transport, "unicast;", sizeof(transport));
1072 av_strlcatf(transport, sizeof(transport),
1073 "client_port=%d", port);
1074 if (rt->transport == RTSP_TRANSPORT_RTP &&
1075 !(rt->server_type == RTSP_SERVER_WMS && i > 0))
1076 av_strlcatf(transport, sizeof(transport), "-%d", port + 1);
1080 else if (lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
1081 /** For WMS streams, the application streams are only used for
1082 * UDP. When trying to set it up for TCP streams, the server
1083 * will return an error. Therefore, we skip those streams. */
1084 if (rt->server_type == RTSP_SERVER_WMS &&
1085 s->streams[rtsp_st->stream_index]->codec->codec_type ==
1088 snprintf(transport, sizeof(transport) - 1,
1089 "%s/TCP;", trans_pref);
1090 if (rt->server_type == RTSP_SERVER_WMS)
1091 av_strlcat(transport, "unicast;", sizeof(transport));
1092 av_strlcatf(transport, sizeof(transport),
1093 "interleaved=%d-%d",
1094 interleave, interleave + 1);
1098 else if (lower_transport == RTSP_LOWER_TRANSPORT_UDP_MULTICAST) {
1099 snprintf(transport, sizeof(transport) - 1,
1100 "%s/UDP;multicast", trans_pref);
1103 av_strlcat(transport, ";mode=receive", sizeof(transport));
1104 } else if (rt->server_type == RTSP_SERVER_REAL ||
1105 rt->server_type == RTSP_SERVER_WMS)
1106 av_strlcat(transport, ";mode=play", sizeof(transport));
1107 snprintf(cmd, sizeof(cmd),
1108 "Transport: %s\r\n",
1110 if (i == 0 && rt->server_type == RTSP_SERVER_REAL) {
1111 char real_res[41], real_csum[9];
1112 ff_rdt_calc_response_and_checksum(real_res, real_csum,
1114 av_strlcatf(cmd, sizeof(cmd),
1116 "RealChallenge2: %s, sd=%s\r\n",
1117 rt->session_id, real_res, real_csum);
1119 ff_rtsp_send_cmd(s, "SETUP", rtsp_st->control_url, cmd, reply, NULL);
1120 if (reply->status_code == 461 /* Unsupported protocol */ && i == 0) {
1123 } else if (reply->status_code != RTSP_STATUS_OK ||
1124 reply->nb_transports != 1) {
1125 err = AVERROR_INVALIDDATA;
1129 /* XXX: same protocol for all streams is required */
1131 if (reply->transports[0].lower_transport != rt->lower_transport ||
1132 reply->transports[0].transport != rt->transport) {
1133 err = AVERROR_INVALIDDATA;
1137 rt->lower_transport = reply->transports[0].lower_transport;
1138 rt->transport = reply->transports[0].transport;
1141 /* close RTP connection if not chosen */
1142 if (reply->transports[0].lower_transport != RTSP_LOWER_TRANSPORT_UDP &&
1143 (lower_transport == RTSP_LOWER_TRANSPORT_UDP)) {
1144 url_close(rtsp_st->rtp_handle);
1145 rtsp_st->rtp_handle = NULL;
1148 switch(reply->transports[0].lower_transport) {
1149 case RTSP_LOWER_TRANSPORT_TCP:
1150 rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
1151 rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
1154 case RTSP_LOWER_TRANSPORT_UDP: {
1157 /* XXX: also use address if specified */
1158 ff_url_join(url, sizeof(url), "rtp", NULL, host,
1159 reply->transports[0].server_port_min, NULL);
1160 if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) &&
1161 rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
1162 err = AVERROR_INVALIDDATA;
1165 /* Try to initialize the connection state in a
1166 * potential NAT router by sending dummy packets.
1167 * RTP/RTCP dummy packets are used for RDT, too.
1169 if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) && s->iformat)
1170 rtp_send_punch_packets(rtsp_st->rtp_handle);
1173 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST: {
1174 char url[1024], namebuf[50];
1175 struct sockaddr_storage addr;
1178 if (reply->transports[0].destination.ss_family) {
1179 addr = reply->transports[0].destination;
1180 port = reply->transports[0].port_min;
1181 ttl = reply->transports[0].ttl;
1183 addr = rtsp_st->sdp_ip;
1184 port = rtsp_st->sdp_port;
1185 ttl = rtsp_st->sdp_ttl;
1187 getnameinfo((struct sockaddr*) &addr, sizeof(addr),
1188 namebuf, sizeof(namebuf), NULL, 0, NI_NUMERICHOST);
1189 ff_url_join(url, sizeof(url), "rtp", NULL, namebuf,
1190 port, "?ttl=%d", ttl);
1191 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1192 err = AVERROR_INVALIDDATA;
1199 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
1203 if (reply->timeout > 0)
1204 rt->timeout = reply->timeout;
1206 if (rt->server_type == RTSP_SERVER_REAL)
1207 rt->need_subscription = 1;
1212 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1213 if (rt->rtsp_streams[i]->rtp_handle) {
1214 url_close(rt->rtsp_streams[i]->rtp_handle);
1215 rt->rtsp_streams[i]->rtp_handle = NULL;
1221 static int rtsp_read_play(AVFormatContext *s)
1223 RTSPState *rt = s->priv_data;
1224 RTSPMessageHeader reply1, *reply = &reply1;
1228 av_log(s, AV_LOG_DEBUG, "hello state=%d\n", rt->state);
1231 if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) {
1232 if (rt->state == RTSP_STATE_PAUSED) {
1235 snprintf(cmd, sizeof(cmd),
1236 "Range: npt=%0.3f-\r\n",
1237 (double)rt->seek_timestamp / AV_TIME_BASE);
1239 ff_rtsp_send_cmd(s, "PLAY", rt->control_uri, cmd, reply, NULL);
1240 if (reply->status_code != RTSP_STATUS_OK) {
1243 if (reply->range_start != AV_NOPTS_VALUE &&
1244 rt->transport == RTSP_TRANSPORT_RTP) {
1245 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1246 RTSPStream *rtsp_st = rt->rtsp_streams[i];
1247 RTPDemuxContext *rtpctx = rtsp_st->transport_priv;
1248 AVStream *st = NULL;
1251 if (rtsp_st->stream_index >= 0)
1252 st = s->streams[rtsp_st->stream_index];
1253 rtpctx->last_rtcp_ntp_time = AV_NOPTS_VALUE;
1254 rtpctx->first_rtcp_ntp_time = AV_NOPTS_VALUE;
1256 rtpctx->range_start_offset = av_rescale_q(reply->range_start,
1262 rt->state = RTSP_STATE_STREAMING;
1266 static int rtsp_setup_input_streams(AVFormatContext *s, RTSPMessageHeader *reply)
1268 RTSPState *rt = s->priv_data;
1270 unsigned char *content = NULL;
1273 /* describe the stream */
1274 snprintf(cmd, sizeof(cmd),
1275 "Accept: application/sdp\r\n");
1276 if (rt->server_type == RTSP_SERVER_REAL) {
1278 * The Require: attribute is needed for proper streaming from
1279 * Realmedia servers.
1282 "Require: com.real.retain-entity-for-setup\r\n",
1285 ff_rtsp_send_cmd(s, "DESCRIBE", rt->control_uri, cmd, reply, &content);
1287 return AVERROR_INVALIDDATA;
1288 if (reply->status_code != RTSP_STATUS_OK) {
1290 return AVERROR_INVALIDDATA;
1293 /* now we got the SDP description, we parse it */
1294 ret = sdp_parse(s, (const char *)content);
1297 return AVERROR_INVALIDDATA;
1302 static int rtsp_setup_output_streams(AVFormatContext *s, const char *addr)
1304 RTSPState *rt = s->priv_data;
1305 RTSPMessageHeader reply1, *reply = &reply1;
1308 AVFormatContext sdp_ctx, *ctx_array[1];
1310 rt->start_time = av_gettime();
1312 /* Announce the stream */
1313 sdp = av_mallocz(SDP_MAX_SIZE);
1315 return AVERROR(ENOMEM);
1316 /* We create the SDP based on the RTSP AVFormatContext where we
1317 * aren't allowed to change the filename field. (We create the SDP
1318 * based on the RTSP context since the contexts for the RTP streams
1319 * don't exist yet.) In order to specify a custom URL with the actual
1320 * peer IP instead of the originally specified hostname, we create
1321 * a temporary copy of the AVFormatContext, where the custom URL is set.
1323 * FIXME: Create the SDP without copying the AVFormatContext.
1324 * This either requires setting up the RTP stream AVFormatContexts
1325 * already here (complicating things immensely) or getting a more
1326 * flexible SDP creation interface.
1329 ff_url_join(sdp_ctx.filename, sizeof(sdp_ctx.filename),
1330 "rtsp", NULL, addr, -1, NULL);
1331 ctx_array[0] = &sdp_ctx;
1332 if (avf_sdp_create(ctx_array, 1, sdp, SDP_MAX_SIZE)) {
1334 return AVERROR_INVALIDDATA;
1336 av_log(s, AV_LOG_INFO, "SDP:\n%s\n", sdp);
1337 ff_rtsp_send_cmd_with_content(s, "ANNOUNCE", rt->control_uri,
1338 "Content-Type: application/sdp\r\n",
1339 reply, NULL, sdp, strlen(sdp));
1341 if (reply->status_code != RTSP_STATUS_OK)
1342 return AVERROR_INVALIDDATA;
1344 /* Set up the RTSPStreams for each AVStream */
1345 for (i = 0; i < s->nb_streams; i++) {
1346 RTSPStream *rtsp_st;
1347 AVStream *st = s->streams[i];
1349 rtsp_st = av_mallocz(sizeof(RTSPStream));
1351 return AVERROR(ENOMEM);
1352 dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st);
1354 st->priv_data = rtsp_st;
1355 rtsp_st->stream_index = i;
1357 av_strlcpy(rtsp_st->control_url, rt->control_uri, sizeof(rtsp_st->control_url));
1358 /* Note, this must match the relative uri set in the sdp content */
1359 av_strlcatf(rtsp_st->control_url, sizeof(rtsp_st->control_url),
1366 void ff_rtsp_close_connections(AVFormatContext *s)
1368 RTSPState *rt = s->priv_data;
1369 if (rt->rtsp_hd_out != rt->rtsp_hd) url_close(rt->rtsp_hd_out);
1370 url_close(rt->rtsp_hd);
1371 rt->rtsp_hd = rt->rtsp_hd_out = NULL;
1374 int ff_rtsp_connect(AVFormatContext *s)
1376 RTSPState *rt = s->priv_data;
1377 char host[1024], path[1024], tcpname[1024], cmd[2048], auth[128];
1378 char *option_list, *option, *filename;
1379 int port, err, tcp_fd;
1380 RTSPMessageHeader reply1 = {0}, *reply = &reply1;
1381 int lower_transport_mask = 0;
1382 char real_challenge[64];
1383 struct sockaddr_storage peer;
1384 socklen_t peer_len = sizeof(peer);
1386 if (!ff_network_init())
1387 return AVERROR(EIO);
1389 rt->control_transport = RTSP_MODE_PLAIN;
1390 /* extract hostname and port */
1391 av_url_split(NULL, 0, auth, sizeof(auth),
1392 host, sizeof(host), &port, path, sizeof(path), s->filename);
1394 av_strlcpy(rt->auth, auth, sizeof(rt->auth));
1397 port = RTSP_DEFAULT_PORT;
1399 /* search for options */
1400 option_list = strrchr(path, '?');
1402 /* Strip out the RTSP specific options, write out the rest of
1403 * the options back into the same string. */
1404 filename = option_list;
1405 while (option_list) {
1406 /* move the option pointer */
1407 option = ++option_list;
1408 option_list = strchr(option_list, '&');
1412 /* handle the options */
1413 if (!strcmp(option, "udp")) {
1414 lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_UDP);
1415 } else if (!strcmp(option, "multicast")) {
1416 lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_UDP_MULTICAST);
1417 } else if (!strcmp(option, "tcp")) {
1418 lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_TCP);
1419 } else if(!strcmp(option, "http")) {
1420 lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_TCP);
1421 rt->control_transport = RTSP_MODE_TUNNEL;
1423 /* Write options back into the buffer, using memmove instead
1424 * of strcpy since the strings may overlap. */
1425 int len = strlen(option);
1426 memmove(++filename, option, len);
1428 if (option_list) *filename = '&';
1434 if (!lower_transport_mask)
1435 lower_transport_mask = (1 << RTSP_LOWER_TRANSPORT_NB) - 1;
1438 /* Only UDP or TCP - UDP multicast isn't supported. */
1439 lower_transport_mask &= (1 << RTSP_LOWER_TRANSPORT_UDP) |
1440 (1 << RTSP_LOWER_TRANSPORT_TCP);
1441 if (!lower_transport_mask || rt->control_transport == RTSP_MODE_TUNNEL) {
1442 av_log(s, AV_LOG_ERROR, "Unsupported lower transport method, "
1443 "only UDP and TCP are supported for output.\n");
1444 err = AVERROR(EINVAL);
1449 /* Construct the URI used in request; this is similar to s->filename,
1450 * but with authentication credentials removed and RTSP specific options
1452 ff_url_join(rt->control_uri, sizeof(rt->control_uri), "rtsp", NULL,
1453 host, port, "%s", path);
1455 if (rt->control_transport == RTSP_MODE_TUNNEL) {
1456 /* set up initial handshake for tunneling */
1457 char httpname[1024];
1458 char sessioncookie[17];
1461 ff_url_join(httpname, sizeof(httpname), "http", auth, host, port, "%s", path);
1462 snprintf(sessioncookie, sizeof(sessioncookie), "%08x%08x",
1463 av_get_random_seed(), av_get_random_seed());
1466 if (url_alloc(&rt->rtsp_hd, httpname, URL_RDONLY) < 0) {
1471 /* generate GET headers */
1472 snprintf(headers, sizeof(headers),
1473 "x-sessioncookie: %s\r\n"
1474 "Accept: application/x-rtsp-tunnelled\r\n"
1475 "Pragma: no-cache\r\n"
1476 "Cache-Control: no-cache\r\n",
1478 ff_http_set_headers(rt->rtsp_hd, headers);
1480 /* complete the connection */
1481 if (url_connect(rt->rtsp_hd)) {
1487 if (url_alloc(&rt->rtsp_hd_out, httpname, URL_WRONLY) < 0 ) {
1492 /* generate POST headers */
1493 snprintf(headers, sizeof(headers),
1494 "x-sessioncookie: %s\r\n"
1495 "Content-Type: application/x-rtsp-tunnelled\r\n"
1496 "Pragma: no-cache\r\n"
1497 "Cache-Control: no-cache\r\n"
1498 "Content-Length: 32767\r\n"
1499 "Expires: Sun, 9 Jan 1972 00:00:00 GMT\r\n",
1501 ff_http_set_headers(rt->rtsp_hd_out, headers);
1502 ff_http_set_chunked_transfer_encoding(rt->rtsp_hd_out, 0);
1504 /* Initialize the authentication state for the POST session. The HTTP
1505 * protocol implementation doesn't properly handle multi-pass
1506 * authentication for POST requests, since it would require one of
1508 * - implementing Expect: 100-continue, which many HTTP servers
1509 * don't support anyway, even less the RTSP servers that do HTTP
1511 * - sending the whole POST data until getting a 401 reply specifying
1512 * what authentication method to use, then resending all that data
1513 * - waiting for potential 401 replies directly after sending the
1514 * POST header (waiting for some unspecified time)
1515 * Therefore, we copy the full auth state, which works for both basic
1516 * and digest. (For digest, we would have to synchronize the nonce
1517 * count variable between the two sessions, if we'd do more requests
1518 * with the original session, though.)
1520 ff_http_init_auth_state(rt->rtsp_hd_out, rt->rtsp_hd);
1522 /* complete the connection */
1523 if (url_connect(rt->rtsp_hd_out)) {
1528 /* open the tcp connection */
1529 ff_url_join(tcpname, sizeof(tcpname), "tcp", NULL, host, port, NULL);
1530 if (url_open(&rt->rtsp_hd, tcpname, URL_RDWR) < 0) {
1534 rt->rtsp_hd_out = rt->rtsp_hd;
1538 tcp_fd = url_get_file_handle(rt->rtsp_hd);
1539 if (!getpeername(tcp_fd, (struct sockaddr*) &peer, &peer_len)) {
1540 getnameinfo((struct sockaddr*) &peer, peer_len, host, sizeof(host),
1541 NULL, 0, NI_NUMERICHOST);
1544 /* request options supported by the server; this also detects server
1546 for (rt->server_type = RTSP_SERVER_RTP;;) {
1548 if (rt->server_type == RTSP_SERVER_REAL)
1551 * The following entries are required for proper
1552 * streaming from a Realmedia server. They are
1553 * interdependent in some way although we currently
1554 * don't quite understand how. Values were copied
1555 * from mplayer SVN r23589.
1556 * @param CompanyID is a 16-byte ID in base64
1557 * @param ClientChallenge is a 16-byte ID in hex
1559 "ClientChallenge: 9e26d33f2984236010ef6253fb1887f7\r\n"
1560 "PlayerStarttime: [28/03/2003:22:50:23 00:00]\r\n"
1561 "CompanyID: KnKV4M4I/B2FjJ1TToLycw==\r\n"
1562 "GUID: 00000000-0000-0000-0000-000000000000\r\n",
1564 ff_rtsp_send_cmd(s, "OPTIONS", rt->control_uri, cmd, reply, NULL);
1565 if (reply->status_code != RTSP_STATUS_OK) {
1566 err = AVERROR_INVALIDDATA;
1570 /* detect server type if not standard-compliant RTP */
1571 if (rt->server_type != RTSP_SERVER_REAL && reply->real_challenge[0]) {
1572 rt->server_type = RTSP_SERVER_REAL;
1574 } else if (!strncasecmp(reply->server, "WMServer/", 9)) {
1575 rt->server_type = RTSP_SERVER_WMS;
1576 } else if (rt->server_type == RTSP_SERVER_REAL)
1577 strcpy(real_challenge, reply->real_challenge);
1582 err = rtsp_setup_input_streams(s, reply);
1584 err = rtsp_setup_output_streams(s, host);
1589 int lower_transport = ff_log2_tab[lower_transport_mask &
1590 ~(lower_transport_mask - 1)];
1592 err = make_setup_request(s, host, port, lower_transport,
1593 rt->server_type == RTSP_SERVER_REAL ?
1594 real_challenge : NULL);
1597 lower_transport_mask &= ~(1 << lower_transport);
1598 if (lower_transport_mask == 0 && err == 1) {
1599 err = FF_NETERROR(EPROTONOSUPPORT);
1604 rt->state = RTSP_STATE_IDLE;
1605 rt->seek_timestamp = 0; /* default is to start stream at position zero */
1608 ff_rtsp_close_streams(s);
1609 ff_rtsp_close_connections(s);
1610 if (reply->status_code >=300 && reply->status_code < 400 && s->iformat) {
1611 av_strlcpy(s->filename, reply->location, sizeof(s->filename));
1612 av_log(s, AV_LOG_INFO, "Status %d: Redirecting to %s\n",
1622 #if CONFIG_RTSP_DEMUXER
1623 static int rtsp_read_header(AVFormatContext *s,
1624 AVFormatParameters *ap)
1626 RTSPState *rt = s->priv_data;
1629 ret = ff_rtsp_connect(s);
1633 rt->real_setup_cache = av_mallocz(2 * s->nb_streams * sizeof(*rt->real_setup_cache));
1634 if (!rt->real_setup_cache)
1635 return AVERROR(ENOMEM);
1636 rt->real_setup = rt->real_setup_cache + s->nb_streams * sizeof(*rt->real_setup);
1638 if (ap->initial_pause) {
1639 /* do not start immediately */
1641 if (rtsp_read_play(s) < 0) {
1642 ff_rtsp_close_streams(s);
1643 ff_rtsp_close_connections(s);
1644 return AVERROR_INVALIDDATA;
1651 static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1652 uint8_t *buf, int buf_size)
1654 RTSPState *rt = s->priv_data;
1655 RTSPStream *rtsp_st;
1657 int fd, fd_rtcp, fd_max, n, i, ret, tcp_fd, timeout_cnt = 0;
1661 if (url_interrupt_cb())
1662 return AVERROR(EINTR);
1665 tcp_fd = fd_max = url_get_file_handle(rt->rtsp_hd);
1666 FD_SET(tcp_fd, &rfds);
1671 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1672 rtsp_st = rt->rtsp_streams[i];
1673 if (rtsp_st->rtp_handle) {
1674 fd = url_get_file_handle(rtsp_st->rtp_handle);
1675 fd_rtcp = rtp_get_rtcp_file_handle(rtsp_st->rtp_handle);
1676 if (FFMAX(fd, fd_rtcp) > fd_max)
1677 fd_max = FFMAX(fd, fd_rtcp);
1679 FD_SET(fd_rtcp, &rfds);
1683 tv.tv_usec = SELECT_TIMEOUT_MS * 1000;
1684 n = select(fd_max + 1, &rfds, NULL, NULL, &tv);
1687 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1688 rtsp_st = rt->rtsp_streams[i];
1689 if (rtsp_st->rtp_handle) {
1690 fd = url_get_file_handle(rtsp_st->rtp_handle);
1691 fd_rtcp = rtp_get_rtcp_file_handle(rtsp_st->rtp_handle);
1692 if (FD_ISSET(fd_rtcp, &rfds) || FD_ISSET(fd, &rfds)) {
1693 ret = url_read(rtsp_st->rtp_handle, buf, buf_size);
1695 *prtsp_st = rtsp_st;
1701 #if CONFIG_RTSP_DEMUXER
1702 if (tcp_fd != -1 && FD_ISSET(tcp_fd, &rfds)) {
1703 RTSPMessageHeader reply;
1705 ret = ff_rtsp_read_reply(s, &reply, NULL, 0);
1708 /* XXX: parse message */
1709 if (rt->state != RTSP_STATE_STREAMING)
1713 } else if (n == 0 && ++timeout_cnt >= MAX_TIMEOUTS) {
1714 return FF_NETERROR(ETIMEDOUT);
1715 } else if (n < 0 && errno != EINTR)
1716 return AVERROR(errno);
1720 static int tcp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1721 uint8_t *buf, int buf_size)
1723 RTSPState *rt = s->priv_data;
1724 int id, len, i, ret;
1725 RTSPStream *rtsp_st;
1727 #ifdef DEBUG_RTP_TCP
1728 dprintf(s, "tcp_read_packet:\n");
1732 RTSPMessageHeader reply;
1734 ret = ff_rtsp_read_reply(s, &reply, NULL, 1);
1737 if (ret == 1) /* received '$' */
1739 /* XXX: parse message */
1740 if (rt->state != RTSP_STATE_STREAMING)
1743 ret = url_read_complete(rt->rtsp_hd, buf, 3);
1747 len = AV_RB16(buf + 1);
1748 #ifdef DEBUG_RTP_TCP
1749 dprintf(s, "id=%d len=%d\n", id, len);
1751 if (len > buf_size || len < 12)
1754 ret = url_read_complete(rt->rtsp_hd, buf, len);
1757 if (rt->transport == RTSP_TRANSPORT_RDT &&
1758 ff_rdt_parse_header(buf, len, &id, NULL, NULL, NULL, NULL) < 0)
1761 /* find the matching stream */
1762 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1763 rtsp_st = rt->rtsp_streams[i];
1764 if (id >= rtsp_st->interleaved_min &&
1765 id <= rtsp_st->interleaved_max)
1770 *prtsp_st = rtsp_st;
1774 static int rtsp_fetch_packet(AVFormatContext *s, AVPacket *pkt)
1776 RTSPState *rt = s->priv_data;
1778 uint8_t buf[10 * RTP_MAX_PACKET_LENGTH];
1779 RTSPStream *rtsp_st;
1781 if (rt->nb_byes == rt->nb_rtsp_streams)
1784 /* get next frames from the same RTP packet */
1785 if (rt->cur_transport_priv) {
1786 if (rt->transport == RTSP_TRANSPORT_RDT) {
1787 ret = ff_rdt_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
1789 ret = rtp_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
1791 rt->cur_transport_priv = NULL;
1793 } else if (ret == 1) {
1796 rt->cur_transport_priv = NULL;
1799 /* read next RTP packet */
1801 switch(rt->lower_transport) {
1803 #if CONFIG_RTSP_DEMUXER
1804 case RTSP_LOWER_TRANSPORT_TCP:
1805 len = tcp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1808 case RTSP_LOWER_TRANSPORT_UDP:
1809 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
1810 len = udp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1811 if (len >=0 && rtsp_st->transport_priv && rt->transport == RTSP_TRANSPORT_RTP)
1812 rtp_check_and_send_back_rr(rtsp_st->transport_priv, len);
1819 if (rt->transport == RTSP_TRANSPORT_RDT) {
1820 ret = ff_rdt_parse_packet(rtsp_st->transport_priv, pkt, buf, len);
1822 ret = rtp_parse_packet(rtsp_st->transport_priv, pkt, buf, len);
1824 /* Either bad packet, or a RTCP packet. Check if the
1825 * first_rtcp_ntp_time field was initialized. */
1826 RTPDemuxContext *rtpctx = rtsp_st->transport_priv;
1827 if (rtpctx->first_rtcp_ntp_time != AV_NOPTS_VALUE) {
1828 /* first_rtcp_ntp_time has been initialized for this stream,
1829 * copy the same value to all other uninitialized streams,
1830 * in order to map their timestamp origin to the same ntp time
1833 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1834 RTPDemuxContext *rtpctx2 = rt->rtsp_streams[i]->transport_priv;
1836 rtpctx2->first_rtcp_ntp_time == AV_NOPTS_VALUE)
1837 rtpctx2->first_rtcp_ntp_time = rtpctx->first_rtcp_ntp_time;
1840 if (ret == -RTCP_BYE) {
1843 av_log(s, AV_LOG_DEBUG, "Received BYE for stream %d (%d/%d)\n",
1844 rtsp_st->stream_index, rt->nb_byes, rt->nb_rtsp_streams);
1846 if (rt->nb_byes == rt->nb_rtsp_streams)
1854 /* more packets may follow, so we save the RTP context */
1855 rt->cur_transport_priv = rtsp_st->transport_priv;
1860 static int rtsp_read_packet(AVFormatContext *s, AVPacket *pkt)
1862 RTSPState *rt = s->priv_data;
1864 RTSPMessageHeader reply1, *reply = &reply1;
1867 if (rt->server_type == RTSP_SERVER_REAL) {
1870 for (i = 0; i < s->nb_streams; i++)
1871 rt->real_setup[i] = s->streams[i]->discard;
1873 if (!rt->need_subscription) {
1874 if (memcmp (rt->real_setup, rt->real_setup_cache,
1875 sizeof(enum AVDiscard) * s->nb_streams)) {
1876 snprintf(cmd, sizeof(cmd),
1877 "Unsubscribe: %s\r\n",
1878 rt->last_subscription);
1879 ff_rtsp_send_cmd(s, "SET_PARAMETER", rt->control_uri,
1881 if (reply->status_code != RTSP_STATUS_OK)
1882 return AVERROR_INVALIDDATA;
1883 rt->need_subscription = 1;
1887 if (rt->need_subscription) {
1888 int r, rule_nr, first = 1;
1890 memcpy(rt->real_setup_cache, rt->real_setup,
1891 sizeof(enum AVDiscard) * s->nb_streams);
1892 rt->last_subscription[0] = 0;
1894 snprintf(cmd, sizeof(cmd),
1896 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1898 for (r = 0; r < s->nb_streams; r++) {
1899 if (s->streams[r]->priv_data == rt->rtsp_streams[i]) {
1900 if (s->streams[r]->discard != AVDISCARD_ALL) {
1902 av_strlcat(rt->last_subscription, ",",
1903 sizeof(rt->last_subscription));
1904 ff_rdt_subscribe_rule(
1905 rt->last_subscription,
1906 sizeof(rt->last_subscription), i, rule_nr);
1913 av_strlcatf(cmd, sizeof(cmd), "%s\r\n", rt->last_subscription);
1914 ff_rtsp_send_cmd(s, "SET_PARAMETER", rt->control_uri,
1916 if (reply->status_code != RTSP_STATUS_OK)
1917 return AVERROR_INVALIDDATA;
1918 rt->need_subscription = 0;
1920 if (rt->state == RTSP_STATE_STREAMING)
1925 ret = rtsp_fetch_packet(s, pkt);
1929 /* send dummy request to keep TCP connection alive */
1930 if ((av_gettime() - rt->last_cmd_time) / 1000000 >= rt->timeout / 2) {
1931 if (rt->server_type == RTSP_SERVER_WMS) {
1932 ff_rtsp_send_cmd_async(s, "GET_PARAMETER", rt->control_uri, NULL);
1934 ff_rtsp_send_cmd_async(s, "OPTIONS", "*", NULL);
1941 /* pause the stream */
1942 static int rtsp_read_pause(AVFormatContext *s)
1944 RTSPState *rt = s->priv_data;
1945 RTSPMessageHeader reply1, *reply = &reply1;
1947 if (rt->state != RTSP_STATE_STREAMING)
1949 else if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) {
1950 ff_rtsp_send_cmd(s, "PAUSE", rt->control_uri, NULL, reply, NULL);
1951 if (reply->status_code != RTSP_STATUS_OK) {
1955 rt->state = RTSP_STATE_PAUSED;
1959 static int rtsp_read_seek(AVFormatContext *s, int stream_index,
1960 int64_t timestamp, int flags)
1962 RTSPState *rt = s->priv_data;
1964 rt->seek_timestamp = av_rescale_q(timestamp,
1965 s->streams[stream_index]->time_base,
1969 case RTSP_STATE_IDLE:
1971 case RTSP_STATE_STREAMING:
1972 if (rtsp_read_pause(s) != 0)
1974 rt->state = RTSP_STATE_SEEKING;
1975 if (rtsp_read_play(s) != 0)
1978 case RTSP_STATE_PAUSED:
1979 rt->state = RTSP_STATE_IDLE;
1985 static int rtsp_read_close(AVFormatContext *s)
1987 RTSPState *rt = s->priv_data;
1990 /* NOTE: it is valid to flush the buffer here */
1991 if (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
1992 url_fclose(&rt->rtsp_gb);
1995 ff_rtsp_send_cmd_async(s, "TEARDOWN", rt->control_uri, NULL);
1997 ff_rtsp_close_streams(s);
1998 ff_rtsp_close_connections(s);
2000 rt->real_setup = NULL;
2001 av_freep(&rt->real_setup_cache);
2005 AVInputFormat rtsp_demuxer = {
2007 NULL_IF_CONFIG_SMALL("RTSP input format"),
2014 .flags = AVFMT_NOFILE,
2015 .read_play = rtsp_read_play,
2016 .read_pause = rtsp_read_pause,
2020 static int sdp_probe(AVProbeData *p1)
2022 const char *p = p1->buf, *p_end = p1->buf + p1->buf_size;
2024 /* we look for a line beginning "c=IN IP" */
2025 while (p < p_end && *p != '\0') {
2026 if (p + sizeof("c=IN IP") - 1 < p_end &&
2027 av_strstart(p, "c=IN IP", NULL))
2028 return AVPROBE_SCORE_MAX / 2;
2030 while (p < p_end - 1 && *p != '\n') p++;
2039 static int sdp_read_header(AVFormatContext *s, AVFormatParameters *ap)
2041 RTSPState *rt = s->priv_data;
2042 RTSPStream *rtsp_st;
2047 if (!ff_network_init())
2048 return AVERROR(EIO);
2050 /* read the whole sdp file */
2051 /* XXX: better loading */
2052 content = av_malloc(SDP_MAX_SIZE);
2053 size = get_buffer(s->pb, content, SDP_MAX_SIZE - 1);
2056 return AVERROR_INVALIDDATA;
2058 content[size] ='\0';
2060 sdp_parse(s, content);
2063 /* open each RTP stream */
2064 for (i = 0; i < rt->nb_rtsp_streams; i++) {
2066 rtsp_st = rt->rtsp_streams[i];
2068 getnameinfo((struct sockaddr*) &rtsp_st->sdp_ip, sizeof(rtsp_st->sdp_ip),
2069 namebuf, sizeof(namebuf), NULL, 0, NI_NUMERICHOST);
2070 ff_url_join(url, sizeof(url), "rtp", NULL,
2071 namebuf, rtsp_st->sdp_port,
2072 "?localport=%d&ttl=%d", rtsp_st->sdp_port,
2074 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
2075 err = AVERROR_INVALIDDATA;
2078 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
2083 ff_rtsp_close_streams(s);
2088 static int sdp_read_close(AVFormatContext *s)
2090 ff_rtsp_close_streams(s);
2095 AVInputFormat sdp_demuxer = {
2097 NULL_IF_CONFIG_SMALL("SDP"),