3 * Copyright (c) 2002 Fabrice Bellard
5 * This file is part of Libav.
7 * Libav 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 * Libav 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 Libav; 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/parseutils.h"
26 #include "libavutil/random_seed.h"
27 #include "libavutil/dict.h"
29 #include "avio_internal.h"
38 #include "os_support.h"
44 #include "rtpdec_formats.h"
45 #include "rtpenc_chain.h"
50 /* Timeout values for socket poll, in ms,
51 * and read_packet(), in seconds */
52 #define POLL_TIMEOUT_MS 100
53 #define READ_PACKET_TIMEOUT_S 10
54 #define MAX_TIMEOUTS READ_PACKET_TIMEOUT_S * 1000 / POLL_TIMEOUT_MS
55 #define SDP_MAX_SIZE 16384
56 #define RECVBUF_SIZE 10 * RTP_MAX_PACKET_LENGTH
58 static void get_word_until_chars(char *buf, int buf_size,
59 const char *sep, const char **pp)
65 p += strspn(p, SPACE_CHARS);
67 while (!strchr(sep, *p) && *p != '\0') {
68 if ((q - buf) < buf_size - 1)
77 static void get_word_sep(char *buf, int buf_size, const char *sep,
80 if (**pp == '/') (*pp)++;
81 get_word_until_chars(buf, buf_size, sep, pp);
84 static void get_word(char *buf, int buf_size, const char **pp)
86 get_word_until_chars(buf, buf_size, SPACE_CHARS, pp);
89 /** Parse a string p in the form of Range:npt=xx-xx, and determine the start
91 * Used for seeking in the rtp stream.
93 static void rtsp_parse_range_npt(const char *p, int64_t *start, int64_t *end)
97 p += strspn(p, SPACE_CHARS);
98 if (!av_stristart(p, "npt=", &p))
101 *start = AV_NOPTS_VALUE;
102 *end = AV_NOPTS_VALUE;
104 get_word_sep(buf, sizeof(buf), "-", &p);
105 av_parse_time(start, buf, 1);
108 get_word_sep(buf, sizeof(buf), "-", &p);
109 av_parse_time(end, buf, 1);
111 // av_log(NULL, AV_LOG_DEBUG, "Range Start: %lld\n", *start);
112 // av_log(NULL, AV_LOG_DEBUG, "Range End: %lld\n", *end);
115 static int get_sockaddr(const char *buf, struct sockaddr_storage *sock)
117 struct addrinfo hints, *ai = NULL;
118 memset(&hints, 0, sizeof(hints));
119 hints.ai_flags = AI_NUMERICHOST;
120 if (getaddrinfo(buf, NULL, &hints, &ai))
122 memcpy(sock, ai->ai_addr, FFMIN(sizeof(*sock), ai->ai_addrlen));
128 static void init_rtp_handler(RTPDynamicProtocolHandler *handler,
129 RTSPStream *rtsp_st, AVCodecContext *codec)
133 codec->codec_id = handler->codec_id;
134 rtsp_st->dynamic_handler = handler;
136 rtsp_st->dynamic_protocol_context = handler->alloc();
139 /* parse the rtpmap description: <codec_name>/<clock_rate>[/<other params>] */
140 static int sdp_parse_rtpmap(AVFormatContext *s,
141 AVStream *st, RTSPStream *rtsp_st,
142 int payload_type, const char *p)
144 AVCodecContext *codec = st->codec;
150 /* Loop into AVRtpDynamicPayloadTypes[] and AVRtpPayloadTypes[] and
151 * see if we can handle this kind of payload.
152 * The space should normally not be there but some Real streams or
153 * particular servers ("RealServer Version 6.1.3.970", see issue 1658)
154 * have a trailing space. */
155 get_word_sep(buf, sizeof(buf), "/ ", &p);
156 if (payload_type >= RTP_PT_PRIVATE) {
157 RTPDynamicProtocolHandler *handler =
158 ff_rtp_handler_find_by_name(buf, codec->codec_type);
159 init_rtp_handler(handler, rtsp_st, codec);
160 /* If no dynamic handler was found, check with the list of standard
161 * allocated types, if such a stream for some reason happens to
162 * use a private payload type. This isn't handled in rtpdec.c, since
163 * the format name from the rtpmap line never is passed into rtpdec. */
164 if (!rtsp_st->dynamic_handler)
165 codec->codec_id = ff_rtp_codec_id(buf, codec->codec_type);
167 /* We are in a standard case
168 * (from http://www.iana.org/assignments/rtp-parameters). */
169 /* search into AVRtpPayloadTypes[] */
170 codec->codec_id = ff_rtp_codec_id(buf, codec->codec_type);
173 c = avcodec_find_decoder(codec->codec_id);
179 get_word_sep(buf, sizeof(buf), "/", &p);
181 switch (codec->codec_type) {
182 case AVMEDIA_TYPE_AUDIO:
183 av_log(s, AV_LOG_DEBUG, "audio codec set to: %s\n", c_name);
184 codec->sample_rate = RTSP_DEFAULT_AUDIO_SAMPLERATE;
185 codec->channels = RTSP_DEFAULT_NB_AUDIO_CHANNELS;
187 codec->sample_rate = i;
188 av_set_pts_info(st, 32, 1, codec->sample_rate);
189 get_word_sep(buf, sizeof(buf), "/", &p);
193 // TODO: there is a bug here; if it is a mono stream, and
194 // less than 22000Hz, faad upconverts to stereo and twice
195 // the frequency. No problem, but the sample rate is being
196 // set here by the sdp line. Patch on its way. (rdm)
198 av_log(s, AV_LOG_DEBUG, "audio samplerate set to: %i\n",
200 av_log(s, AV_LOG_DEBUG, "audio channels set to: %i\n",
203 case AVMEDIA_TYPE_VIDEO:
204 av_log(s, AV_LOG_DEBUG, "video codec set to: %s\n", c_name);
206 av_set_pts_info(st, 32, 1, i);
214 /* parse the attribute line from the fmtp a line of an sdp response. This
215 * is broken out as a function because it is used in rtp_h264.c, which is
217 int ff_rtsp_next_attr_and_value(const char **p, char *attr, int attr_size,
218 char *value, int value_size)
220 *p += strspn(*p, SPACE_CHARS);
222 get_word_sep(attr, attr_size, "=", p);
225 get_word_sep(value, value_size, ";", p);
233 typedef struct SDPParseState {
235 struct sockaddr_storage default_ip;
237 int skip_media; ///< set if an unknown m= line occurs
240 static void sdp_parse_line(AVFormatContext *s, SDPParseState *s1,
241 int letter, const char *buf)
243 RTSPState *rt = s->priv_data;
244 char buf1[64], st_type[64];
246 enum AVMediaType codec_type;
250 struct sockaddr_storage sdp_ip;
253 av_dlog(s, "sdp: %c='%s'\n", letter, buf);
256 if (s1->skip_media && letter != 'm')
260 get_word(buf1, sizeof(buf1), &p);
261 if (strcmp(buf1, "IN") != 0)
263 get_word(buf1, sizeof(buf1), &p);
264 if (strcmp(buf1, "IP4") && strcmp(buf1, "IP6"))
266 get_word_sep(buf1, sizeof(buf1), "/", &p);
267 if (get_sockaddr(buf1, &sdp_ip))
272 get_word_sep(buf1, sizeof(buf1), "/", &p);
275 if (s->nb_streams == 0) {
276 s1->default_ip = sdp_ip;
277 s1->default_ttl = ttl;
279 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
280 rtsp_st->sdp_ip = sdp_ip;
281 rtsp_st->sdp_ttl = ttl;
285 av_dict_set(&s->metadata, "title", p, 0);
288 if (s->nb_streams == 0) {
289 av_dict_set(&s->metadata, "comment", p, 0);
296 get_word(st_type, sizeof(st_type), &p);
297 if (!strcmp(st_type, "audio")) {
298 codec_type = AVMEDIA_TYPE_AUDIO;
299 } else if (!strcmp(st_type, "video")) {
300 codec_type = AVMEDIA_TYPE_VIDEO;
301 } else if (!strcmp(st_type, "application")) {
302 codec_type = AVMEDIA_TYPE_DATA;
307 rtsp_st = av_mallocz(sizeof(RTSPStream));
310 rtsp_st->stream_index = -1;
311 dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st);
313 rtsp_st->sdp_ip = s1->default_ip;
314 rtsp_st->sdp_ttl = s1->default_ttl;
316 get_word(buf1, sizeof(buf1), &p); /* port */
317 rtsp_st->sdp_port = atoi(buf1);
319 get_word(buf1, sizeof(buf1), &p); /* protocol (ignored) */
321 /* XXX: handle list of formats */
322 get_word(buf1, sizeof(buf1), &p); /* format list */
323 rtsp_st->sdp_payload_type = atoi(buf1);
325 if (!strcmp(ff_rtp_enc_name(rtsp_st->sdp_payload_type), "MP2T")) {
326 /* no corresponding stream */
328 st = av_new_stream(s, rt->nb_rtsp_streams - 1);
331 rtsp_st->stream_index = st->index;
332 st->codec->codec_type = codec_type;
333 if (rtsp_st->sdp_payload_type < RTP_PT_PRIVATE) {
334 RTPDynamicProtocolHandler *handler;
335 /* if standard payload type, we can find the codec right now */
336 ff_rtp_get_codec_info(st->codec, rtsp_st->sdp_payload_type);
337 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
338 st->codec->sample_rate > 0)
339 av_set_pts_info(st, 32, 1, st->codec->sample_rate);
340 /* Even static payload types may need a custom depacketizer */
341 handler = ff_rtp_handler_find_by_id(
342 rtsp_st->sdp_payload_type, st->codec->codec_type);
343 init_rtp_handler(handler, rtsp_st, st->codec);
346 /* put a default control url */
347 av_strlcpy(rtsp_st->control_url, rt->control_uri,
348 sizeof(rtsp_st->control_url));
351 if (av_strstart(p, "control:", &p)) {
352 if (s->nb_streams == 0) {
353 if (!strncmp(p, "rtsp://", 7))
354 av_strlcpy(rt->control_uri, p,
355 sizeof(rt->control_uri));
358 /* get the control url */
359 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
361 /* XXX: may need to add full url resolution */
362 av_url_split(proto, sizeof(proto), NULL, 0, NULL, 0,
364 if (proto[0] == '\0') {
365 /* relative control URL */
366 if (rtsp_st->control_url[strlen(rtsp_st->control_url)-1]!='/')
367 av_strlcat(rtsp_st->control_url, "/",
368 sizeof(rtsp_st->control_url));
369 av_strlcat(rtsp_st->control_url, p,
370 sizeof(rtsp_st->control_url));
372 av_strlcpy(rtsp_st->control_url, p,
373 sizeof(rtsp_st->control_url));
375 } else if (av_strstart(p, "rtpmap:", &p) && s->nb_streams > 0) {
376 /* NOTE: rtpmap is only supported AFTER the 'm=' tag */
377 get_word(buf1, sizeof(buf1), &p);
378 payload_type = atoi(buf1);
379 st = s->streams[s->nb_streams - 1];
380 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
381 sdp_parse_rtpmap(s, st, rtsp_st, payload_type, p);
382 } else if (av_strstart(p, "fmtp:", &p) ||
383 av_strstart(p, "framesize:", &p)) {
384 /* NOTE: fmtp is only supported AFTER the 'a=rtpmap:xxx' tag */
385 // let dynamic protocol handlers have a stab at the line.
386 get_word(buf1, sizeof(buf1), &p);
387 payload_type = atoi(buf1);
388 for (i = 0; i < rt->nb_rtsp_streams; i++) {
389 rtsp_st = rt->rtsp_streams[i];
390 if (rtsp_st->sdp_payload_type == payload_type &&
391 rtsp_st->dynamic_handler &&
392 rtsp_st->dynamic_handler->parse_sdp_a_line)
393 rtsp_st->dynamic_handler->parse_sdp_a_line(s, i,
394 rtsp_st->dynamic_protocol_context, buf);
396 } else if (av_strstart(p, "range:", &p)) {
399 // this is so that seeking on a streamed file can work.
400 rtsp_parse_range_npt(p, &start, &end);
401 s->start_time = start;
402 /* AV_NOPTS_VALUE means live broadcast (and can't seek) */
403 s->duration = (end == AV_NOPTS_VALUE) ?
404 AV_NOPTS_VALUE : end - start;
405 } else if (av_strstart(p, "IsRealDataType:integer;",&p)) {
407 rt->transport = RTSP_TRANSPORT_RDT;
408 } else if (av_strstart(p, "SampleRate:integer;", &p) &&
410 st = s->streams[s->nb_streams - 1];
411 st->codec->sample_rate = atoi(p);
413 if (rt->server_type == RTSP_SERVER_WMS)
414 ff_wms_parse_sdp_a_line(s, p);
415 if (s->nb_streams > 0) {
416 if (rt->server_type == RTSP_SERVER_REAL)
417 ff_real_parse_sdp_a_line(s, s->nb_streams - 1, p);
419 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
420 if (rtsp_st->dynamic_handler &&
421 rtsp_st->dynamic_handler->parse_sdp_a_line)
422 rtsp_st->dynamic_handler->parse_sdp_a_line(s,
424 rtsp_st->dynamic_protocol_context, buf);
431 int ff_sdp_parse(AVFormatContext *s, const char *content)
433 RTSPState *rt = s->priv_data;
436 /* Some SDP lines, particularly for Realmedia or ASF RTSP streams,
437 * contain long SDP lines containing complete ASF Headers (several
438 * kB) or arrays of MDPR (RM stream descriptor) headers plus
439 * "rulebooks" describing their properties. Therefore, the SDP line
442 * The Vorbis FMTP line can be up to 16KB - see xiph_parse_sdp_line
443 * in rtpdec_xiph.c. */
445 SDPParseState sdp_parse_state, *s1 = &sdp_parse_state;
447 memset(s1, 0, sizeof(SDPParseState));
450 p += strspn(p, SPACE_CHARS);
458 /* get the content */
460 while (*p != '\n' && *p != '\r' && *p != '\0') {
461 if ((q - buf) < sizeof(buf) - 1)
466 sdp_parse_line(s, s1, letter, buf);
468 while (*p != '\n' && *p != '\0')
473 rt->p = av_malloc(sizeof(struct pollfd)*2*(rt->nb_rtsp_streams+1));
474 if (!rt->p) return AVERROR(ENOMEM);
477 #endif /* CONFIG_RTPDEC */
479 void ff_rtsp_undo_setup(AVFormatContext *s)
481 RTSPState *rt = s->priv_data;
484 for (i = 0; i < rt->nb_rtsp_streams; i++) {
485 RTSPStream *rtsp_st = rt->rtsp_streams[i];
488 if (rtsp_st->transport_priv) {
490 AVFormatContext *rtpctx = rtsp_st->transport_priv;
491 av_write_trailer(rtpctx);
492 if (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
494 avio_close_dyn_buf(rtpctx->pb, &ptr);
497 avio_close(rtpctx->pb);
499 avformat_free_context(rtpctx);
500 } else if (rt->transport == RTSP_TRANSPORT_RDT && CONFIG_RTPDEC)
501 ff_rdt_parse_close(rtsp_st->transport_priv);
502 else if (CONFIG_RTPDEC)
503 rtp_parse_close(rtsp_st->transport_priv);
505 rtsp_st->transport_priv = NULL;
506 if (rtsp_st->rtp_handle)
507 ffurl_close(rtsp_st->rtp_handle);
508 rtsp_st->rtp_handle = NULL;
512 /* close and free RTSP streams */
513 void ff_rtsp_close_streams(AVFormatContext *s)
515 RTSPState *rt = s->priv_data;
519 ff_rtsp_undo_setup(s);
520 for (i = 0; i < rt->nb_rtsp_streams; i++) {
521 rtsp_st = rt->rtsp_streams[i];
523 if (rtsp_st->dynamic_handler && rtsp_st->dynamic_protocol_context)
524 rtsp_st->dynamic_handler->free(
525 rtsp_st->dynamic_protocol_context);
529 av_free(rt->rtsp_streams);
531 av_close_input_stream (rt->asf_ctx);
535 av_free(rt->recvbuf);
538 static int rtsp_open_transport_ctx(AVFormatContext *s, RTSPStream *rtsp_st)
540 RTSPState *rt = s->priv_data;
543 /* open the RTP context */
544 if (rtsp_st->stream_index >= 0)
545 st = s->streams[rtsp_st->stream_index];
547 s->ctx_flags |= AVFMTCTX_NOHEADER;
549 if (s->oformat && CONFIG_RTSP_MUXER) {
550 rtsp_st->transport_priv = ff_rtp_chain_mux_open(s, st,
552 RTSP_TCP_MAX_PACKET_SIZE);
553 /* Ownership of rtp_handle is passed to the rtp mux context */
554 rtsp_st->rtp_handle = NULL;
555 } else if (rt->transport == RTSP_TRANSPORT_RDT && CONFIG_RTPDEC)
556 rtsp_st->transport_priv = ff_rdt_parse_open(s, st->index,
557 rtsp_st->dynamic_protocol_context,
558 rtsp_st->dynamic_handler);
559 else if (CONFIG_RTPDEC)
560 rtsp_st->transport_priv = rtp_parse_open(s, st, rtsp_st->rtp_handle,
561 rtsp_st->sdp_payload_type,
562 (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP || !s->max_delay)
563 ? 0 : RTP_REORDER_QUEUE_DEFAULT_SIZE);
565 if (!rtsp_st->transport_priv) {
566 return AVERROR(ENOMEM);
567 } else if (rt->transport != RTSP_TRANSPORT_RDT && CONFIG_RTPDEC) {
568 if (rtsp_st->dynamic_handler) {
569 rtp_parse_set_dynamic_protocol(rtsp_st->transport_priv,
570 rtsp_st->dynamic_protocol_context,
571 rtsp_st->dynamic_handler);
578 #if CONFIG_RTSP_DEMUXER || CONFIG_RTSP_MUXER
579 static void rtsp_parse_range(int *min_ptr, int *max_ptr, const char **pp)
585 p += strspn(p, SPACE_CHARS);
586 v = strtol(p, (char **)&p, 10);
590 v = strtol(p, (char **)&p, 10);
599 /* XXX: only one transport specification is parsed */
600 static void rtsp_parse_transport(RTSPMessageHeader *reply, const char *p)
602 char transport_protocol[16];
604 char lower_transport[16];
606 RTSPTransportField *th;
609 reply->nb_transports = 0;
612 p += strspn(p, SPACE_CHARS);
616 th = &reply->transports[reply->nb_transports];
618 get_word_sep(transport_protocol, sizeof(transport_protocol),
620 if (!strcasecmp (transport_protocol, "rtp")) {
621 get_word_sep(profile, sizeof(profile), "/;,", &p);
622 lower_transport[0] = '\0';
623 /* rtp/avp/<protocol> */
625 get_word_sep(lower_transport, sizeof(lower_transport),
628 th->transport = RTSP_TRANSPORT_RTP;
629 } else if (!strcasecmp (transport_protocol, "x-pn-tng") ||
630 !strcasecmp (transport_protocol, "x-real-rdt")) {
631 /* x-pn-tng/<protocol> */
632 get_word_sep(lower_transport, sizeof(lower_transport), "/;,", &p);
634 th->transport = RTSP_TRANSPORT_RDT;
636 if (!strcasecmp(lower_transport, "TCP"))
637 th->lower_transport = RTSP_LOWER_TRANSPORT_TCP;
639 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP;
643 /* get each parameter */
644 while (*p != '\0' && *p != ',') {
645 get_word_sep(parameter, sizeof(parameter), "=;,", &p);
646 if (!strcmp(parameter, "port")) {
649 rtsp_parse_range(&th->port_min, &th->port_max, &p);
651 } else if (!strcmp(parameter, "client_port")) {
654 rtsp_parse_range(&th->client_port_min,
655 &th->client_port_max, &p);
657 } else if (!strcmp(parameter, "server_port")) {
660 rtsp_parse_range(&th->server_port_min,
661 &th->server_port_max, &p);
663 } else if (!strcmp(parameter, "interleaved")) {
666 rtsp_parse_range(&th->interleaved_min,
667 &th->interleaved_max, &p);
669 } else if (!strcmp(parameter, "multicast")) {
670 if (th->lower_transport == RTSP_LOWER_TRANSPORT_UDP)
671 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP_MULTICAST;
672 } else if (!strcmp(parameter, "ttl")) {
675 th->ttl = strtol(p, (char **)&p, 10);
677 } else if (!strcmp(parameter, "destination")) {
680 get_word_sep(buf, sizeof(buf), ";,", &p);
681 get_sockaddr(buf, &th->destination);
683 } else if (!strcmp(parameter, "source")) {
686 get_word_sep(buf, sizeof(buf), ";,", &p);
687 av_strlcpy(th->source, buf, sizeof(th->source));
691 while (*p != ';' && *p != '\0' && *p != ',')
699 reply->nb_transports++;
703 static void handle_rtp_info(RTSPState *rt, const char *url,
704 uint32_t seq, uint32_t rtptime)
707 if (!rtptime || !url[0])
709 if (rt->transport != RTSP_TRANSPORT_RTP)
711 for (i = 0; i < rt->nb_rtsp_streams; i++) {
712 RTSPStream *rtsp_st = rt->rtsp_streams[i];
713 RTPDemuxContext *rtpctx = rtsp_st->transport_priv;
716 if (!strcmp(rtsp_st->control_url, url)) {
717 rtpctx->base_timestamp = rtptime;
723 static void rtsp_parse_rtp_info(RTSPState *rt, const char *p)
726 char key[20], value[1024], url[1024] = "";
727 uint32_t seq = 0, rtptime = 0;
730 p += strspn(p, SPACE_CHARS);
733 get_word_sep(key, sizeof(key), "=", &p);
737 get_word_sep(value, sizeof(value), ";, ", &p);
739 if (!strcmp(key, "url"))
740 av_strlcpy(url, value, sizeof(url));
741 else if (!strcmp(key, "seq"))
742 seq = strtoul(value, NULL, 10);
743 else if (!strcmp(key, "rtptime"))
744 rtptime = strtoul(value, NULL, 10);
746 handle_rtp_info(rt, url, seq, rtptime);
755 handle_rtp_info(rt, url, seq, rtptime);
758 void ff_rtsp_parse_line(RTSPMessageHeader *reply, const char *buf,
759 RTSPState *rt, const char *method)
763 /* NOTE: we do case independent match for broken servers */
765 if (av_stristart(p, "Session:", &p)) {
767 get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p);
768 if (av_stristart(p, ";timeout=", &p) &&
769 (t = strtol(p, NULL, 10)) > 0) {
772 } else if (av_stristart(p, "Content-Length:", &p)) {
773 reply->content_length = strtol(p, NULL, 10);
774 } else if (av_stristart(p, "Transport:", &p)) {
775 rtsp_parse_transport(reply, p);
776 } else if (av_stristart(p, "CSeq:", &p)) {
777 reply->seq = strtol(p, NULL, 10);
778 } else if (av_stristart(p, "Range:", &p)) {
779 rtsp_parse_range_npt(p, &reply->range_start, &reply->range_end);
780 } else if (av_stristart(p, "RealChallenge1:", &p)) {
781 p += strspn(p, SPACE_CHARS);
782 av_strlcpy(reply->real_challenge, p, sizeof(reply->real_challenge));
783 } else if (av_stristart(p, "Server:", &p)) {
784 p += strspn(p, SPACE_CHARS);
785 av_strlcpy(reply->server, p, sizeof(reply->server));
786 } else if (av_stristart(p, "Notice:", &p) ||
787 av_stristart(p, "X-Notice:", &p)) {
788 reply->notice = strtol(p, NULL, 10);
789 } else if (av_stristart(p, "Location:", &p)) {
790 p += strspn(p, SPACE_CHARS);
791 av_strlcpy(reply->location, p , sizeof(reply->location));
792 } else if (av_stristart(p, "WWW-Authenticate:", &p) && rt) {
793 p += strspn(p, SPACE_CHARS);
794 ff_http_auth_handle_header(&rt->auth_state, "WWW-Authenticate", p);
795 } else if (av_stristart(p, "Authentication-Info:", &p) && rt) {
796 p += strspn(p, SPACE_CHARS);
797 ff_http_auth_handle_header(&rt->auth_state, "Authentication-Info", p);
798 } else if (av_stristart(p, "Content-Base:", &p) && rt) {
799 p += strspn(p, SPACE_CHARS);
800 if (method && !strcmp(method, "DESCRIBE"))
801 av_strlcpy(rt->control_uri, p , sizeof(rt->control_uri));
802 } else if (av_stristart(p, "RTP-Info:", &p) && rt) {
803 p += strspn(p, SPACE_CHARS);
804 if (method && !strcmp(method, "PLAY"))
805 rtsp_parse_rtp_info(rt, p);
806 } else if (av_stristart(p, "Public:", &p) && rt) {
807 if (strstr(p, "GET_PARAMETER") &&
808 method && !strcmp(method, "OPTIONS"))
809 rt->get_parameter_supported = 1;
813 /* skip a RTP/TCP interleaved packet */
814 void ff_rtsp_skip_packet(AVFormatContext *s)
816 RTSPState *rt = s->priv_data;
820 ret = ffurl_read_complete(rt->rtsp_hd, buf, 3);
823 len = AV_RB16(buf + 1);
825 av_dlog(s, "skipping RTP packet len=%d\n", len);
830 if (len1 > sizeof(buf))
832 ret = ffurl_read_complete(rt->rtsp_hd, buf, len1);
839 int ff_rtsp_read_reply(AVFormatContext *s, RTSPMessageHeader *reply,
840 unsigned char **content_ptr,
841 int return_on_interleaved_data, const char *method)
843 RTSPState *rt = s->priv_data;
844 char buf[4096], buf1[1024], *q;
847 int ret, content_length, line_count = 0;
848 unsigned char *content = NULL;
850 memset(reply, 0, sizeof(*reply));
852 /* parse reply (XXX: use buffers) */
853 rt->last_reply[0] = '\0';
857 ret = ffurl_read_complete(rt->rtsp_hd, &ch, 1);
858 av_dlog(s, "ret=%d c=%02x [%c]\n", ret, ch, ch);
864 /* XXX: only parse it if first char on line ? */
865 if (return_on_interleaved_data) {
868 ff_rtsp_skip_packet(s);
869 } else if (ch != '\r') {
870 if ((q - buf) < sizeof(buf) - 1)
876 av_dlog(s, "line='%s'\n", buf);
878 /* test if last line */
882 if (line_count == 0) {
884 get_word(buf1, sizeof(buf1), &p);
885 get_word(buf1, sizeof(buf1), &p);
886 reply->status_code = atoi(buf1);
887 av_strlcpy(reply->reason, p, sizeof(reply->reason));
889 ff_rtsp_parse_line(reply, p, rt, method);
890 av_strlcat(rt->last_reply, p, sizeof(rt->last_reply));
891 av_strlcat(rt->last_reply, "\n", sizeof(rt->last_reply));
896 if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0')
897 av_strlcpy(rt->session_id, reply->session_id, sizeof(rt->session_id));
899 content_length = reply->content_length;
900 if (content_length > 0) {
901 /* leave some room for a trailing '\0' (useful for simple parsing) */
902 content = av_malloc(content_length + 1);
903 ffurl_read_complete(rt->rtsp_hd, content, content_length);
904 content[content_length] = '\0';
907 *content_ptr = content;
911 if (rt->seq != reply->seq) {
912 av_log(s, AV_LOG_WARNING, "CSeq %d expected, %d received.\n",
913 rt->seq, reply->seq);
917 if (reply->notice == 2101 /* End-of-Stream Reached */ ||
918 reply->notice == 2104 /* Start-of-Stream Reached */ ||
919 reply->notice == 2306 /* Continuous Feed Terminated */) {
920 rt->state = RTSP_STATE_IDLE;
921 } else if (reply->notice >= 4400 && reply->notice < 5500) {
922 return AVERROR(EIO); /* data or server error */
923 } else if (reply->notice == 2401 /* Ticket Expired */ ||
924 (reply->notice >= 5500 && reply->notice < 5600) /* end of term */ )
925 return AVERROR(EPERM);
931 * Send a command to the RTSP server without waiting for the reply.
933 * @param s RTSP (de)muxer context
934 * @param method the method for the request
935 * @param url the target url for the request
936 * @param headers extra header lines to include in the request
937 * @param send_content if non-null, the data to send as request body content
938 * @param send_content_length the length of the send_content data, or 0 if
939 * send_content is null
941 * @return zero if success, nonzero otherwise
943 static int ff_rtsp_send_cmd_with_content_async(AVFormatContext *s,
944 const char *method, const char *url,
946 const unsigned char *send_content,
947 int send_content_length)
949 RTSPState *rt = s->priv_data;
950 char buf[4096], *out_buf;
951 char base64buf[AV_BASE64_SIZE(sizeof(buf))];
953 /* Add in RTSP headers */
956 snprintf(buf, sizeof(buf), "%s %s RTSP/1.0\r\n", method, url);
958 av_strlcat(buf, headers, sizeof(buf));
959 av_strlcatf(buf, sizeof(buf), "CSeq: %d\r\n", rt->seq);
960 if (rt->session_id[0] != '\0' && (!headers ||
961 !strstr(headers, "\nIf-Match:"))) {
962 av_strlcatf(buf, sizeof(buf), "Session: %s\r\n", rt->session_id);
965 char *str = ff_http_auth_create_response(&rt->auth_state,
966 rt->auth, url, method);
968 av_strlcat(buf, str, sizeof(buf));
971 if (send_content_length > 0 && send_content)
972 av_strlcatf(buf, sizeof(buf), "Content-Length: %d\r\n", send_content_length);
973 av_strlcat(buf, "\r\n", sizeof(buf));
975 /* base64 encode rtsp if tunneling */
976 if (rt->control_transport == RTSP_MODE_TUNNEL) {
977 av_base64_encode(base64buf, sizeof(base64buf), buf, strlen(buf));
981 av_dlog(s, "Sending:\n%s--\n", buf);
983 ffurl_write(rt->rtsp_hd_out, out_buf, strlen(out_buf));
984 if (send_content_length > 0 && send_content) {
985 if (rt->control_transport == RTSP_MODE_TUNNEL) {
986 av_log(s, AV_LOG_ERROR, "tunneling of RTSP requests "
987 "with content data not supported\n");
988 return AVERROR_PATCHWELCOME;
990 ffurl_write(rt->rtsp_hd_out, send_content, send_content_length);
992 rt->last_cmd_time = av_gettime();
997 int ff_rtsp_send_cmd_async(AVFormatContext *s, const char *method,
998 const char *url, const char *headers)
1000 return ff_rtsp_send_cmd_with_content_async(s, method, url, headers, NULL, 0);
1003 int ff_rtsp_send_cmd(AVFormatContext *s, const char *method, const char *url,
1004 const char *headers, RTSPMessageHeader *reply,
1005 unsigned char **content_ptr)
1007 return ff_rtsp_send_cmd_with_content(s, method, url, headers, reply,
1008 content_ptr, NULL, 0);
1011 int ff_rtsp_send_cmd_with_content(AVFormatContext *s,
1012 const char *method, const char *url,
1014 RTSPMessageHeader *reply,
1015 unsigned char **content_ptr,
1016 const unsigned char *send_content,
1017 int send_content_length)
1019 RTSPState *rt = s->priv_data;
1020 HTTPAuthType cur_auth_type;
1024 cur_auth_type = rt->auth_state.auth_type;
1025 if ((ret = ff_rtsp_send_cmd_with_content_async(s, method, url, header,
1027 send_content_length)))
1030 if ((ret = ff_rtsp_read_reply(s, reply, content_ptr, 0, method) ) < 0)
1033 if (reply->status_code == 401 && cur_auth_type == HTTP_AUTH_NONE &&
1034 rt->auth_state.auth_type != HTTP_AUTH_NONE)
1037 if (reply->status_code > 400){
1038 av_log(s, AV_LOG_ERROR, "method %s failed: %d%s\n",
1042 av_log(s, AV_LOG_DEBUG, "%s\n", rt->last_reply);
1048 int ff_rtsp_make_setup_request(AVFormatContext *s, const char *host, int port,
1049 int lower_transport, const char *real_challenge)
1051 RTSPState *rt = s->priv_data;
1052 int rtx, j, i, err, interleave = 0;
1053 RTSPStream *rtsp_st;
1054 RTSPMessageHeader reply1, *reply = &reply1;
1056 const char *trans_pref;
1058 if (rt->transport == RTSP_TRANSPORT_RDT)
1059 trans_pref = "x-pn-tng";
1061 trans_pref = "RTP/AVP";
1063 /* default timeout: 1 minute */
1066 /* for each stream, make the setup request */
1067 /* XXX: we assume the same server is used for the control of each
1070 for (j = RTSP_RTP_PORT_MIN, i = 0; i < rt->nb_rtsp_streams; ++i) {
1071 char transport[2048];
1074 * WMS serves all UDP data over a single connection, the RTX, which
1075 * isn't necessarily the first in the SDP but has to be the first
1076 * to be set up, else the second/third SETUP will fail with a 461.
1078 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP &&
1079 rt->server_type == RTSP_SERVER_WMS) {
1082 for (rtx = 0; rtx < rt->nb_rtsp_streams; rtx++) {
1083 int len = strlen(rt->rtsp_streams[rtx]->control_url);
1085 !strcmp(rt->rtsp_streams[rtx]->control_url + len - 4,
1089 if (rtx == rt->nb_rtsp_streams)
1090 return -1; /* no RTX found */
1091 rtsp_st = rt->rtsp_streams[rtx];
1093 rtsp_st = rt->rtsp_streams[i > rtx ? i : i - 1];
1095 rtsp_st = rt->rtsp_streams[i];
1098 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP) {
1101 if (rt->server_type == RTSP_SERVER_WMS && i > 1) {
1102 port = reply->transports[0].client_port_min;
1106 /* first try in specified port range */
1107 if (RTSP_RTP_PORT_MIN != 0) {
1108 while (j <= RTSP_RTP_PORT_MAX) {
1109 ff_url_join(buf, sizeof(buf), "rtp", NULL, host, -1,
1110 "?localport=%d", j);
1111 /* we will use two ports per rtp stream (rtp and rtcp) */
1113 if (ffurl_open(&rtsp_st->rtp_handle, buf, AVIO_FLAG_READ_WRITE) == 0)
1119 /* then try on any port */
1120 if (ffurl_open(&rtsp_st->rtp_handle, "rtp://", AVIO_FLAG_READ) < 0) {
1121 err = AVERROR_INVALIDDATA;
1125 av_log(s, AV_LOG_ERROR, "Unable to open an input RTP port\n");
1131 port = rtp_get_local_rtp_port(rtsp_st->rtp_handle);
1133 snprintf(transport, sizeof(transport) - 1,
1134 "%s/UDP;", trans_pref);
1135 if (rt->server_type != RTSP_SERVER_REAL)
1136 av_strlcat(transport, "unicast;", sizeof(transport));
1137 av_strlcatf(transport, sizeof(transport),
1138 "client_port=%d", port);
1139 if (rt->transport == RTSP_TRANSPORT_RTP &&
1140 !(rt->server_type == RTSP_SERVER_WMS && i > 0))
1141 av_strlcatf(transport, sizeof(transport), "-%d", port + 1);
1145 else if (lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
1146 /* For WMS streams, the application streams are only used for
1147 * UDP. When trying to set it up for TCP streams, the server
1148 * will return an error. Therefore, we skip those streams. */
1149 if (rt->server_type == RTSP_SERVER_WMS &&
1150 s->streams[rtsp_st->stream_index]->codec->codec_type ==
1153 snprintf(transport, sizeof(transport) - 1,
1154 "%s/TCP;", trans_pref);
1155 if (rt->transport != RTSP_TRANSPORT_RDT)
1156 av_strlcat(transport, "unicast;", sizeof(transport));
1157 av_strlcatf(transport, sizeof(transport),
1158 "interleaved=%d-%d",
1159 interleave, interleave + 1);
1163 else if (lower_transport == RTSP_LOWER_TRANSPORT_UDP_MULTICAST) {
1164 snprintf(transport, sizeof(transport) - 1,
1165 "%s/UDP;multicast", trans_pref);
1168 av_strlcat(transport, ";mode=receive", sizeof(transport));
1169 } else if (rt->server_type == RTSP_SERVER_REAL ||
1170 rt->server_type == RTSP_SERVER_WMS)
1171 av_strlcat(transport, ";mode=play", sizeof(transport));
1172 snprintf(cmd, sizeof(cmd),
1173 "Transport: %s\r\n",
1175 if (i == 0 && rt->server_type == RTSP_SERVER_REAL && CONFIG_RTPDEC) {
1176 char real_res[41], real_csum[9];
1177 ff_rdt_calc_response_and_checksum(real_res, real_csum,
1179 av_strlcatf(cmd, sizeof(cmd),
1181 "RealChallenge2: %s, sd=%s\r\n",
1182 rt->session_id, real_res, real_csum);
1184 ff_rtsp_send_cmd(s, "SETUP", rtsp_st->control_url, cmd, reply, NULL);
1185 if (reply->status_code == 461 /* Unsupported protocol */ && i == 0) {
1188 } else if (reply->status_code != RTSP_STATUS_OK ||
1189 reply->nb_transports != 1) {
1190 err = AVERROR_INVALIDDATA;
1194 /* XXX: same protocol for all streams is required */
1196 if (reply->transports[0].lower_transport != rt->lower_transport ||
1197 reply->transports[0].transport != rt->transport) {
1198 err = AVERROR_INVALIDDATA;
1202 rt->lower_transport = reply->transports[0].lower_transport;
1203 rt->transport = reply->transports[0].transport;
1206 /* Fail if the server responded with another lower transport mode
1207 * than what we requested. */
1208 if (reply->transports[0].lower_transport != lower_transport) {
1209 av_log(s, AV_LOG_ERROR, "Nonmatching transport in server reply\n");
1210 err = AVERROR_INVALIDDATA;
1214 switch(reply->transports[0].lower_transport) {
1215 case RTSP_LOWER_TRANSPORT_TCP:
1216 rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
1217 rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
1220 case RTSP_LOWER_TRANSPORT_UDP: {
1221 char url[1024], options[30] = "";
1223 if (rt->filter_source)
1224 av_strlcpy(options, "?connect=1", sizeof(options));
1225 /* Use source address if specified */
1226 if (reply->transports[0].source[0]) {
1227 ff_url_join(url, sizeof(url), "rtp", NULL,
1228 reply->transports[0].source,
1229 reply->transports[0].server_port_min, "%s", options);
1231 ff_url_join(url, sizeof(url), "rtp", NULL, host,
1232 reply->transports[0].server_port_min, "%s", options);
1234 if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) &&
1235 rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
1236 err = AVERROR_INVALIDDATA;
1239 /* Try to initialize the connection state in a
1240 * potential NAT router by sending dummy packets.
1241 * RTP/RTCP dummy packets are used for RDT, too.
1243 if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) && s->iformat &&
1245 rtp_send_punch_packets(rtsp_st->rtp_handle);
1248 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST: {
1249 char url[1024], namebuf[50];
1250 struct sockaddr_storage addr;
1253 if (reply->transports[0].destination.ss_family) {
1254 addr = reply->transports[0].destination;
1255 port = reply->transports[0].port_min;
1256 ttl = reply->transports[0].ttl;
1258 addr = rtsp_st->sdp_ip;
1259 port = rtsp_st->sdp_port;
1260 ttl = rtsp_st->sdp_ttl;
1262 getnameinfo((struct sockaddr*) &addr, sizeof(addr),
1263 namebuf, sizeof(namebuf), NULL, 0, NI_NUMERICHOST);
1264 ff_url_join(url, sizeof(url), "rtp", NULL, namebuf,
1265 port, "?ttl=%d", ttl);
1266 if (ffurl_open(&rtsp_st->rtp_handle, url, AVIO_FLAG_READ_WRITE) < 0) {
1267 err = AVERROR_INVALIDDATA;
1274 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
1278 if (reply->timeout > 0)
1279 rt->timeout = reply->timeout;
1281 if (rt->server_type == RTSP_SERVER_REAL)
1282 rt->need_subscription = 1;
1287 ff_rtsp_undo_setup(s);
1291 void ff_rtsp_close_connections(AVFormatContext *s)
1293 RTSPState *rt = s->priv_data;
1294 if (rt->rtsp_hd_out != rt->rtsp_hd) ffurl_close(rt->rtsp_hd_out);
1295 ffurl_close(rt->rtsp_hd);
1296 rt->rtsp_hd = rt->rtsp_hd_out = NULL;
1299 int ff_rtsp_connect(AVFormatContext *s)
1301 RTSPState *rt = s->priv_data;
1302 char host[1024], path[1024], tcpname[1024], cmd[2048], auth[128];
1303 char *option_list, *option, *filename;
1304 int port, err, tcp_fd;
1305 RTSPMessageHeader reply1 = {0}, *reply = &reply1;
1306 int lower_transport_mask = 0;
1307 char real_challenge[64] = "";
1308 struct sockaddr_storage peer;
1309 socklen_t peer_len = sizeof(peer);
1311 if (!ff_network_init())
1312 return AVERROR(EIO);
1314 rt->control_transport = RTSP_MODE_PLAIN;
1315 /* extract hostname and port */
1316 av_url_split(NULL, 0, auth, sizeof(auth),
1317 host, sizeof(host), &port, path, sizeof(path), s->filename);
1319 av_strlcpy(rt->auth, auth, sizeof(rt->auth));
1322 port = RTSP_DEFAULT_PORT;
1324 /* search for options */
1325 option_list = strrchr(path, '?');
1327 /* Strip out the RTSP specific options, write out the rest of
1328 * the options back into the same string. */
1329 filename = option_list;
1330 while (option_list) {
1331 /* move the option pointer */
1332 option = ++option_list;
1333 option_list = strchr(option_list, '&');
1337 /* handle the options */
1338 if (!strcmp(option, "udp")) {
1339 lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_UDP);
1340 } else if (!strcmp(option, "multicast")) {
1341 lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_UDP_MULTICAST);
1342 } else if (!strcmp(option, "tcp")) {
1343 lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_TCP);
1344 } else if(!strcmp(option, "http")) {
1345 lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_TCP);
1346 rt->control_transport = RTSP_MODE_TUNNEL;
1347 } else if (!strcmp(option, "filter_src")) {
1348 rt->filter_source = 1;
1350 /* Write options back into the buffer, using memmove instead
1351 * of strcpy since the strings may overlap. */
1352 int len = strlen(option);
1353 memmove(++filename, option, len);
1355 if (option_list) *filename = '&';
1361 if (!lower_transport_mask)
1362 lower_transport_mask = (1 << RTSP_LOWER_TRANSPORT_NB) - 1;
1365 /* Only UDP or TCP - UDP multicast isn't supported. */
1366 lower_transport_mask &= (1 << RTSP_LOWER_TRANSPORT_UDP) |
1367 (1 << RTSP_LOWER_TRANSPORT_TCP);
1368 if (!lower_transport_mask || rt->control_transport == RTSP_MODE_TUNNEL) {
1369 av_log(s, AV_LOG_ERROR, "Unsupported lower transport method, "
1370 "only UDP and TCP are supported for output.\n");
1371 err = AVERROR(EINVAL);
1376 /* Construct the URI used in request; this is similar to s->filename,
1377 * but with authentication credentials removed and RTSP specific options
1379 ff_url_join(rt->control_uri, sizeof(rt->control_uri), "rtsp", NULL,
1380 host, port, "%s", path);
1382 if (rt->control_transport == RTSP_MODE_TUNNEL) {
1383 /* set up initial handshake for tunneling */
1384 char httpname[1024];
1385 char sessioncookie[17];
1388 ff_url_join(httpname, sizeof(httpname), "http", auth, host, port, "%s", path);
1389 snprintf(sessioncookie, sizeof(sessioncookie), "%08x%08x",
1390 av_get_random_seed(), av_get_random_seed());
1393 if (ffurl_alloc(&rt->rtsp_hd, httpname, AVIO_FLAG_READ) < 0) {
1398 /* generate GET headers */
1399 snprintf(headers, sizeof(headers),
1400 "x-sessioncookie: %s\r\n"
1401 "Accept: application/x-rtsp-tunnelled\r\n"
1402 "Pragma: no-cache\r\n"
1403 "Cache-Control: no-cache\r\n",
1405 ff_http_set_headers(rt->rtsp_hd, headers);
1407 /* complete the connection */
1408 if (ffurl_connect(rt->rtsp_hd)) {
1414 if (ffurl_alloc(&rt->rtsp_hd_out, httpname, AVIO_FLAG_WRITE) < 0 ) {
1419 /* generate POST headers */
1420 snprintf(headers, sizeof(headers),
1421 "x-sessioncookie: %s\r\n"
1422 "Content-Type: application/x-rtsp-tunnelled\r\n"
1423 "Pragma: no-cache\r\n"
1424 "Cache-Control: no-cache\r\n"
1425 "Content-Length: 32767\r\n"
1426 "Expires: Sun, 9 Jan 1972 00:00:00 GMT\r\n",
1428 ff_http_set_headers(rt->rtsp_hd_out, headers);
1429 ff_http_set_chunked_transfer_encoding(rt->rtsp_hd_out, 0);
1431 /* Initialize the authentication state for the POST session. The HTTP
1432 * protocol implementation doesn't properly handle multi-pass
1433 * authentication for POST requests, since it would require one of
1435 * - implementing Expect: 100-continue, which many HTTP servers
1436 * don't support anyway, even less the RTSP servers that do HTTP
1438 * - sending the whole POST data until getting a 401 reply specifying
1439 * what authentication method to use, then resending all that data
1440 * - waiting for potential 401 replies directly after sending the
1441 * POST header (waiting for some unspecified time)
1442 * Therefore, we copy the full auth state, which works for both basic
1443 * and digest. (For digest, we would have to synchronize the nonce
1444 * count variable between the two sessions, if we'd do more requests
1445 * with the original session, though.)
1447 ff_http_init_auth_state(rt->rtsp_hd_out, rt->rtsp_hd);
1449 /* complete the connection */
1450 if (ffurl_connect(rt->rtsp_hd_out)) {
1455 /* open the tcp connection */
1456 ff_url_join(tcpname, sizeof(tcpname), "tcp", NULL, host, port, NULL);
1457 if (ffurl_open(&rt->rtsp_hd, tcpname, AVIO_FLAG_READ_WRITE) < 0) {
1461 rt->rtsp_hd_out = rt->rtsp_hd;
1465 tcp_fd = ffurl_get_file_handle(rt->rtsp_hd);
1466 if (!getpeername(tcp_fd, (struct sockaddr*) &peer, &peer_len)) {
1467 getnameinfo((struct sockaddr*) &peer, peer_len, host, sizeof(host),
1468 NULL, 0, NI_NUMERICHOST);
1471 /* request options supported by the server; this also detects server
1473 for (rt->server_type = RTSP_SERVER_RTP;;) {
1475 if (rt->server_type == RTSP_SERVER_REAL)
1478 * The following entries are required for proper
1479 * streaming from a Realmedia server. They are
1480 * interdependent in some way although we currently
1481 * don't quite understand how. Values were copied
1482 * from mplayer SVN r23589.
1483 * ClientChallenge is a 16-byte ID in hex
1484 * CompanyID is a 16-byte ID in base64
1486 "ClientChallenge: 9e26d33f2984236010ef6253fb1887f7\r\n"
1487 "PlayerStarttime: [28/03/2003:22:50:23 00:00]\r\n"
1488 "CompanyID: KnKV4M4I/B2FjJ1TToLycw==\r\n"
1489 "GUID: 00000000-0000-0000-0000-000000000000\r\n",
1491 ff_rtsp_send_cmd(s, "OPTIONS", rt->control_uri, cmd, reply, NULL);
1492 if (reply->status_code != RTSP_STATUS_OK) {
1493 err = AVERROR_INVALIDDATA;
1497 /* detect server type if not standard-compliant RTP */
1498 if (rt->server_type != RTSP_SERVER_REAL && reply->real_challenge[0]) {
1499 rt->server_type = RTSP_SERVER_REAL;
1501 } else if (!strncasecmp(reply->server, "WMServer/", 9)) {
1502 rt->server_type = RTSP_SERVER_WMS;
1503 } else if (rt->server_type == RTSP_SERVER_REAL)
1504 strcpy(real_challenge, reply->real_challenge);
1508 if (s->iformat && CONFIG_RTSP_DEMUXER)
1509 err = ff_rtsp_setup_input_streams(s, reply);
1510 else if (CONFIG_RTSP_MUXER)
1511 err = ff_rtsp_setup_output_streams(s, host);
1516 int lower_transport = ff_log2_tab[lower_transport_mask &
1517 ~(lower_transport_mask - 1)];
1519 err = ff_rtsp_make_setup_request(s, host, port, lower_transport,
1520 rt->server_type == RTSP_SERVER_REAL ?
1521 real_challenge : NULL);
1524 lower_transport_mask &= ~(1 << lower_transport);
1525 if (lower_transport_mask == 0 && err == 1) {
1526 err = AVERROR(EPROTONOSUPPORT);
1531 rt->lower_transport_mask = lower_transport_mask;
1532 av_strlcpy(rt->real_challenge, real_challenge, sizeof(rt->real_challenge));
1533 rt->state = RTSP_STATE_IDLE;
1534 rt->seek_timestamp = 0; /* default is to start stream at position zero */
1537 ff_rtsp_close_streams(s);
1538 ff_rtsp_close_connections(s);
1539 if (reply->status_code >=300 && reply->status_code < 400 && s->iformat) {
1540 av_strlcpy(s->filename, reply->location, sizeof(s->filename));
1541 av_log(s, AV_LOG_INFO, "Status %d: Redirecting to %s\n",
1549 #endif /* CONFIG_RTSP_DEMUXER || CONFIG_RTSP_MUXER */
1552 static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1553 uint8_t *buf, int buf_size, int64_t wait_end)
1555 RTSPState *rt = s->priv_data;
1556 RTSPStream *rtsp_st;
1557 int n, i, ret, tcp_fd, timeout_cnt = 0;
1559 struct pollfd *p = rt->p;
1562 if (url_interrupt_cb())
1563 return AVERROR_EXIT;
1564 if (wait_end && wait_end - av_gettime() < 0)
1565 return AVERROR(EAGAIN);
1568 tcp_fd = ffurl_get_file_handle(rt->rtsp_hd);
1569 p[max_p].fd = tcp_fd;
1570 p[max_p++].events = POLLIN;
1574 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1575 rtsp_st = rt->rtsp_streams[i];
1576 if (rtsp_st->rtp_handle) {
1577 p[max_p].fd = ffurl_get_file_handle(rtsp_st->rtp_handle);
1578 p[max_p++].events = POLLIN;
1579 p[max_p].fd = rtp_get_rtcp_file_handle(rtsp_st->rtp_handle);
1580 p[max_p++].events = POLLIN;
1583 n = poll(p, max_p, POLL_TIMEOUT_MS);
1585 int j = 1 - (tcp_fd == -1);
1587 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1588 rtsp_st = rt->rtsp_streams[i];
1589 if (rtsp_st->rtp_handle) {
1590 if (p[j].revents & POLLIN || p[j+1].revents & POLLIN) {
1591 ret = ffurl_read(rtsp_st->rtp_handle, buf, buf_size);
1593 *prtsp_st = rtsp_st;
1600 #if CONFIG_RTSP_DEMUXER
1601 if (tcp_fd != -1 && p[0].revents & POLLIN) {
1602 RTSPMessageHeader reply;
1604 ret = ff_rtsp_read_reply(s, &reply, NULL, 0, NULL);
1607 /* XXX: parse message */
1608 if (rt->state != RTSP_STATE_STREAMING)
1612 } else if (n == 0 && ++timeout_cnt >= MAX_TIMEOUTS) {
1613 return AVERROR(ETIMEDOUT);
1614 } else if (n < 0 && errno != EINTR)
1615 return AVERROR(errno);
1619 int ff_rtsp_fetch_packet(AVFormatContext *s, AVPacket *pkt)
1621 RTSPState *rt = s->priv_data;
1623 RTSPStream *rtsp_st, *first_queue_st = NULL;
1624 int64_t wait_end = 0;
1626 if (rt->nb_byes == rt->nb_rtsp_streams)
1629 /* get next frames from the same RTP packet */
1630 if (rt->cur_transport_priv) {
1631 if (rt->transport == RTSP_TRANSPORT_RDT) {
1632 ret = ff_rdt_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
1634 ret = rtp_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
1636 rt->cur_transport_priv = NULL;
1638 } else if (ret == 1) {
1641 rt->cur_transport_priv = NULL;
1644 if (rt->transport == RTSP_TRANSPORT_RTP) {
1646 int64_t first_queue_time = 0;
1647 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1648 RTPDemuxContext *rtpctx = rt->rtsp_streams[i]->transport_priv;
1652 queue_time = ff_rtp_queued_packet_time(rtpctx);
1653 if (queue_time && (queue_time - first_queue_time < 0 ||
1654 !first_queue_time)) {
1655 first_queue_time = queue_time;
1656 first_queue_st = rt->rtsp_streams[i];
1659 if (first_queue_time)
1660 wait_end = first_queue_time + s->max_delay;
1663 /* read next RTP packet */
1666 rt->recvbuf = av_malloc(RECVBUF_SIZE);
1668 return AVERROR(ENOMEM);
1671 switch(rt->lower_transport) {
1673 #if CONFIG_RTSP_DEMUXER
1674 case RTSP_LOWER_TRANSPORT_TCP:
1675 len = ff_rtsp_tcp_read_packet(s, &rtsp_st, rt->recvbuf, RECVBUF_SIZE);
1678 case RTSP_LOWER_TRANSPORT_UDP:
1679 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
1680 len = udp_read_packet(s, &rtsp_st, rt->recvbuf, RECVBUF_SIZE, wait_end);
1681 if (len > 0 && rtsp_st->transport_priv && rt->transport == RTSP_TRANSPORT_RTP)
1682 rtp_check_and_send_back_rr(rtsp_st->transport_priv, len);
1685 if (len == AVERROR(EAGAIN) && first_queue_st &&
1686 rt->transport == RTSP_TRANSPORT_RTP) {
1687 rtsp_st = first_queue_st;
1688 ret = rtp_parse_packet(rtsp_st->transport_priv, pkt, NULL, 0);
1695 if (rt->transport == RTSP_TRANSPORT_RDT) {
1696 ret = ff_rdt_parse_packet(rtsp_st->transport_priv, pkt, &rt->recvbuf, len);
1698 ret = rtp_parse_packet(rtsp_st->transport_priv, pkt, &rt->recvbuf, len);
1700 /* Either bad packet, or a RTCP packet. Check if the
1701 * first_rtcp_ntp_time field was initialized. */
1702 RTPDemuxContext *rtpctx = rtsp_st->transport_priv;
1703 if (rtpctx->first_rtcp_ntp_time != AV_NOPTS_VALUE) {
1704 /* first_rtcp_ntp_time has been initialized for this stream,
1705 * copy the same value to all other uninitialized streams,
1706 * in order to map their timestamp origin to the same ntp time
1709 AVStream *st = NULL;
1710 if (rtsp_st->stream_index >= 0)
1711 st = s->streams[rtsp_st->stream_index];
1712 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1713 RTPDemuxContext *rtpctx2 = rt->rtsp_streams[i]->transport_priv;
1714 AVStream *st2 = NULL;
1715 if (rt->rtsp_streams[i]->stream_index >= 0)
1716 st2 = s->streams[rt->rtsp_streams[i]->stream_index];
1717 if (rtpctx2 && st && st2 &&
1718 rtpctx2->first_rtcp_ntp_time == AV_NOPTS_VALUE) {
1719 rtpctx2->first_rtcp_ntp_time = rtpctx->first_rtcp_ntp_time;
1720 rtpctx2->rtcp_ts_offset = av_rescale_q(
1721 rtpctx->rtcp_ts_offset, st->time_base,
1726 if (ret == -RTCP_BYE) {
1729 av_log(s, AV_LOG_DEBUG, "Received BYE for stream %d (%d/%d)\n",
1730 rtsp_st->stream_index, rt->nb_byes, rt->nb_rtsp_streams);
1732 if (rt->nb_byes == rt->nb_rtsp_streams)
1741 /* more packets may follow, so we save the RTP context */
1742 rt->cur_transport_priv = rtsp_st->transport_priv;
1746 #endif /* CONFIG_RTPDEC */
1748 #if CONFIG_SDP_DEMUXER
1749 static int sdp_probe(AVProbeData *p1)
1751 const char *p = p1->buf, *p_end = p1->buf + p1->buf_size;
1753 /* we look for a line beginning "c=IN IP" */
1754 while (p < p_end && *p != '\0') {
1755 if (p + sizeof("c=IN IP") - 1 < p_end &&
1756 av_strstart(p, "c=IN IP", NULL))
1757 return AVPROBE_SCORE_MAX / 2;
1759 while (p < p_end - 1 && *p != '\n') p++;
1768 static int sdp_read_header(AVFormatContext *s, AVFormatParameters *ap)
1770 RTSPState *rt = s->priv_data;
1771 RTSPStream *rtsp_st;
1776 if (!ff_network_init())
1777 return AVERROR(EIO);
1779 /* read the whole sdp file */
1780 /* XXX: better loading */
1781 content = av_malloc(SDP_MAX_SIZE);
1782 size = avio_read(s->pb, content, SDP_MAX_SIZE - 1);
1785 return AVERROR_INVALIDDATA;
1787 content[size] ='\0';
1789 err = ff_sdp_parse(s, content);
1793 /* open each RTP stream */
1794 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1796 rtsp_st = rt->rtsp_streams[i];
1798 getnameinfo((struct sockaddr*) &rtsp_st->sdp_ip, sizeof(rtsp_st->sdp_ip),
1799 namebuf, sizeof(namebuf), NULL, 0, NI_NUMERICHOST);
1800 ff_url_join(url, sizeof(url), "rtp", NULL,
1801 namebuf, rtsp_st->sdp_port,
1802 "?localport=%d&ttl=%d", rtsp_st->sdp_port,
1804 if (ffurl_open(&rtsp_st->rtp_handle, url, AVIO_FLAG_READ_WRITE) < 0) {
1805 err = AVERROR_INVALIDDATA;
1808 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
1813 ff_rtsp_close_streams(s);
1818 static int sdp_read_close(AVFormatContext *s)
1820 ff_rtsp_close_streams(s);
1825 AVInputFormat ff_sdp_demuxer = {
1827 NULL_IF_CONFIG_SMALL("SDP"),
1831 ff_rtsp_fetch_packet,
1834 #endif /* CONFIG_SDP_DEMUXER */
1836 #if CONFIG_RTP_DEMUXER
1837 static int rtp_probe(AVProbeData *p)
1839 if (av_strstart(p->filename, "rtp:", NULL))
1840 return AVPROBE_SCORE_MAX;
1844 static int rtp_read_header(AVFormatContext *s,
1845 AVFormatParameters *ap)
1847 uint8_t recvbuf[1500];
1848 char host[500], sdp[500];
1850 URLContext* in = NULL;
1852 AVCodecContext codec;
1853 struct sockaddr_storage addr;
1855 socklen_t addrlen = sizeof(addr);
1857 if (!ff_network_init())
1858 return AVERROR(EIO);
1860 ret = ffurl_open(&in, s->filename, AVIO_FLAG_READ);
1865 ret = ffurl_read(in, recvbuf, sizeof(recvbuf));
1866 if (ret == AVERROR(EAGAIN))
1871 av_log(s, AV_LOG_WARNING, "Received too short packet\n");
1875 if ((recvbuf[0] & 0xc0) != 0x80) {
1876 av_log(s, AV_LOG_WARNING, "Unsupported RTP version packet "
1881 payload_type = recvbuf[1] & 0x7f;
1884 getsockname(ffurl_get_file_handle(in), (struct sockaddr*) &addr, &addrlen);
1888 memset(&codec, 0, sizeof(codec));
1889 if (ff_rtp_get_codec_info(&codec, payload_type)) {
1890 av_log(s, AV_LOG_ERROR, "Unable to receive RTP payload type %d "
1891 "without an SDP file describing it\n",
1895 if (codec.codec_type != AVMEDIA_TYPE_DATA) {
1896 av_log(s, AV_LOG_WARNING, "Guessing on RTP content - if not received "
1897 "properly you need an SDP file "
1901 av_url_split(NULL, 0, NULL, 0, host, sizeof(host), &port,
1902 NULL, 0, s->filename);
1904 snprintf(sdp, sizeof(sdp),
1905 "v=0\r\nc=IN IP%d %s\r\nm=%s %d RTP/AVP %d\r\n",
1906 addr.ss_family == AF_INET ? 4 : 6, host,
1907 codec.codec_type == AVMEDIA_TYPE_DATA ? "application" :
1908 codec.codec_type == AVMEDIA_TYPE_VIDEO ? "video" : "audio",
1909 port, payload_type);
1910 av_log(s, AV_LOG_VERBOSE, "SDP:\n%s\n", sdp);
1912 ffio_init_context(&pb, sdp, strlen(sdp), 0, NULL, NULL, NULL, NULL);
1915 /* sdp_read_header initializes this again */
1918 ret = sdp_read_header(s, ap);
1929 AVInputFormat ff_rtp_demuxer = {
1931 NULL_IF_CONFIG_SMALL("RTP input format"),
1935 ff_rtsp_fetch_packet,
1937 .flags = AVFMT_NOFILE,
1939 #endif /* CONFIG_RTP_DEMUXER */