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/mathematics.h"
26 #include "libavutil/parseutils.h"
27 #include "libavutil/random_seed.h"
28 #include "libavutil/dict.h"
30 #include "avio_internal.h"
39 #include "os_support.h"
45 #include "rtpdec_formats.h"
46 #include "rtpenc_chain.h"
52 /* Timeout values for socket poll, in ms,
53 * and read_packet(), in seconds */
54 #define POLL_TIMEOUT_MS 100
55 #define READ_PACKET_TIMEOUT_S 10
56 #define MAX_TIMEOUTS READ_PACKET_TIMEOUT_S * 1000 / POLL_TIMEOUT_MS
57 #define SDP_MAX_SIZE 16384
58 #define RECVBUF_SIZE 10 * RTP_MAX_PACKET_LENGTH
60 #define OFFSET(x) offsetof(RTSPState, x)
61 #define DEC AV_OPT_FLAG_DECODING_PARAM
62 #define ENC AV_OPT_FLAG_ENCODING_PARAM
64 #define RTSP_FLAG_OPTS(name, longname) \
65 { name, longname, OFFSET(rtsp_flags), AV_OPT_TYPE_FLAGS, {0}, INT_MIN, INT_MAX, DEC, "rtsp_flags" }, \
66 { "filter_src", "Only receive packets from the negotiated peer IP", 0, AV_OPT_TYPE_CONST, {RTSP_FLAG_FILTER_SRC}, 0, 0, DEC, "rtsp_flags" }
68 const AVOption ff_rtsp_options[] = {
69 { "initial_pause", "Don't start playing the stream immediately", OFFSET(initial_pause), AV_OPT_TYPE_INT, {0}, 0, 1, DEC },
70 FF_RTP_FLAG_OPTS(RTSPState, rtp_muxer_flags),
71 { "rtsp_transport", "RTSP transport protocols", OFFSET(lower_transport_mask), AV_OPT_TYPE_FLAGS, {0}, INT_MIN, INT_MAX, DEC|ENC, "rtsp_transport" }, \
72 { "udp", "UDP", 0, AV_OPT_TYPE_CONST, {1 << RTSP_LOWER_TRANSPORT_UDP}, 0, 0, DEC|ENC, "rtsp_transport" }, \
73 { "tcp", "TCP", 0, AV_OPT_TYPE_CONST, {1 << RTSP_LOWER_TRANSPORT_TCP}, 0, 0, DEC|ENC, "rtsp_transport" }, \
74 { "udp_multicast", "UDP multicast", 0, AV_OPT_TYPE_CONST, {1 << RTSP_LOWER_TRANSPORT_UDP_MULTICAST}, 0, 0, DEC, "rtsp_transport" },
75 { "http", "HTTP tunneling", 0, AV_OPT_TYPE_CONST, {(1 << RTSP_LOWER_TRANSPORT_HTTP)}, 0, 0, DEC, "rtsp_transport" },
76 RTSP_FLAG_OPTS("rtsp_flags", "RTSP flags"),
80 static const AVOption sdp_options[] = {
81 RTSP_FLAG_OPTS("sdp_flags", "SDP flags"),
85 static const AVOption rtp_options[] = {
86 RTSP_FLAG_OPTS("rtp_flags", "RTP flags"),
90 static void get_word_until_chars(char *buf, int buf_size,
91 const char *sep, const char **pp)
97 p += strspn(p, SPACE_CHARS);
99 while (!strchr(sep, *p) && *p != '\0') {
100 if ((q - buf) < buf_size - 1)
109 static void get_word_sep(char *buf, int buf_size, const char *sep,
112 if (**pp == '/') (*pp)++;
113 get_word_until_chars(buf, buf_size, sep, pp);
116 static void get_word(char *buf, int buf_size, const char **pp)
118 get_word_until_chars(buf, buf_size, SPACE_CHARS, pp);
121 /** Parse a string p in the form of Range:npt=xx-xx, and determine the start
123 * Used for seeking in the rtp stream.
125 static void rtsp_parse_range_npt(const char *p, int64_t *start, int64_t *end)
129 p += strspn(p, SPACE_CHARS);
130 if (!av_stristart(p, "npt=", &p))
133 *start = AV_NOPTS_VALUE;
134 *end = AV_NOPTS_VALUE;
136 get_word_sep(buf, sizeof(buf), "-", &p);
137 av_parse_time(start, buf, 1);
140 get_word_sep(buf, sizeof(buf), "-", &p);
141 av_parse_time(end, buf, 1);
143 // av_log(NULL, AV_LOG_DEBUG, "Range Start: %lld\n", *start);
144 // av_log(NULL, AV_LOG_DEBUG, "Range End: %lld\n", *end);
147 static int get_sockaddr(const char *buf, struct sockaddr_storage *sock)
149 struct addrinfo hints, *ai = NULL;
150 memset(&hints, 0, sizeof(hints));
151 hints.ai_flags = AI_NUMERICHOST;
152 if (getaddrinfo(buf, NULL, &hints, &ai))
154 memcpy(sock, ai->ai_addr, FFMIN(sizeof(*sock), ai->ai_addrlen));
160 static void init_rtp_handler(RTPDynamicProtocolHandler *handler,
161 RTSPStream *rtsp_st, AVCodecContext *codec)
165 codec->codec_id = handler->codec_id;
166 rtsp_st->dynamic_handler = handler;
168 rtsp_st->dynamic_protocol_context = handler->alloc();
171 /* parse the rtpmap description: <codec_name>/<clock_rate>[/<other params>] */
172 static int sdp_parse_rtpmap(AVFormatContext *s,
173 AVStream *st, RTSPStream *rtsp_st,
174 int payload_type, const char *p)
176 AVCodecContext *codec = st->codec;
182 /* Loop into AVRtpDynamicPayloadTypes[] and AVRtpPayloadTypes[] and
183 * see if we can handle this kind of payload.
184 * The space should normally not be there but some Real streams or
185 * particular servers ("RealServer Version 6.1.3.970", see issue 1658)
186 * have a trailing space. */
187 get_word_sep(buf, sizeof(buf), "/ ", &p);
188 if (payload_type >= RTP_PT_PRIVATE) {
189 RTPDynamicProtocolHandler *handler =
190 ff_rtp_handler_find_by_name(buf, codec->codec_type);
191 init_rtp_handler(handler, rtsp_st, codec);
192 /* If no dynamic handler was found, check with the list of standard
193 * allocated types, if such a stream for some reason happens to
194 * use a private payload type. This isn't handled in rtpdec.c, since
195 * the format name from the rtpmap line never is passed into rtpdec. */
196 if (!rtsp_st->dynamic_handler)
197 codec->codec_id = ff_rtp_codec_id(buf, codec->codec_type);
199 /* We are in a standard case
200 * (from http://www.iana.org/assignments/rtp-parameters). */
201 /* search into AVRtpPayloadTypes[] */
202 codec->codec_id = ff_rtp_codec_id(buf, codec->codec_type);
205 c = avcodec_find_decoder(codec->codec_id);
211 get_word_sep(buf, sizeof(buf), "/", &p);
213 switch (codec->codec_type) {
214 case AVMEDIA_TYPE_AUDIO:
215 av_log(s, AV_LOG_DEBUG, "audio codec set to: %s\n", c_name);
216 codec->sample_rate = RTSP_DEFAULT_AUDIO_SAMPLERATE;
217 codec->channels = RTSP_DEFAULT_NB_AUDIO_CHANNELS;
219 codec->sample_rate = i;
220 av_set_pts_info(st, 32, 1, codec->sample_rate);
221 get_word_sep(buf, sizeof(buf), "/", &p);
225 // TODO: there is a bug here; if it is a mono stream, and
226 // less than 22000Hz, faad upconverts to stereo and twice
227 // the frequency. No problem, but the sample rate is being
228 // set here by the sdp line. Patch on its way. (rdm)
230 av_log(s, AV_LOG_DEBUG, "audio samplerate set to: %i\n",
232 av_log(s, AV_LOG_DEBUG, "audio channels set to: %i\n",
235 case AVMEDIA_TYPE_VIDEO:
236 av_log(s, AV_LOG_DEBUG, "video codec set to: %s\n", c_name);
238 av_set_pts_info(st, 32, 1, i);
246 /* parse the attribute line from the fmtp a line of an sdp response. This
247 * is broken out as a function because it is used in rtp_h264.c, which is
249 int ff_rtsp_next_attr_and_value(const char **p, char *attr, int attr_size,
250 char *value, int value_size)
252 *p += strspn(*p, SPACE_CHARS);
254 get_word_sep(attr, attr_size, "=", p);
257 get_word_sep(value, value_size, ";", p);
265 typedef struct SDPParseState {
267 struct sockaddr_storage default_ip;
269 int skip_media; ///< set if an unknown m= line occurs
272 static void sdp_parse_line(AVFormatContext *s, SDPParseState *s1,
273 int letter, const char *buf)
275 RTSPState *rt = s->priv_data;
276 char buf1[64], st_type[64];
278 enum AVMediaType codec_type;
282 struct sockaddr_storage sdp_ip;
285 av_dlog(s, "sdp: %c='%s'\n", letter, buf);
288 if (s1->skip_media && letter != 'm')
292 get_word(buf1, sizeof(buf1), &p);
293 if (strcmp(buf1, "IN") != 0)
295 get_word(buf1, sizeof(buf1), &p);
296 if (strcmp(buf1, "IP4") && strcmp(buf1, "IP6"))
298 get_word_sep(buf1, sizeof(buf1), "/", &p);
299 if (get_sockaddr(buf1, &sdp_ip))
304 get_word_sep(buf1, sizeof(buf1), "/", &p);
307 if (s->nb_streams == 0) {
308 s1->default_ip = sdp_ip;
309 s1->default_ttl = ttl;
311 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
312 rtsp_st->sdp_ip = sdp_ip;
313 rtsp_st->sdp_ttl = ttl;
317 av_dict_set(&s->metadata, "title", p, 0);
320 if (s->nb_streams == 0) {
321 av_dict_set(&s->metadata, "comment", p, 0);
328 get_word(st_type, sizeof(st_type), &p);
329 if (!strcmp(st_type, "audio")) {
330 codec_type = AVMEDIA_TYPE_AUDIO;
331 } else if (!strcmp(st_type, "video")) {
332 codec_type = AVMEDIA_TYPE_VIDEO;
333 } else if (!strcmp(st_type, "application")) {
334 codec_type = AVMEDIA_TYPE_DATA;
339 rtsp_st = av_mallocz(sizeof(RTSPStream));
342 rtsp_st->stream_index = -1;
343 dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st);
345 rtsp_st->sdp_ip = s1->default_ip;
346 rtsp_st->sdp_ttl = s1->default_ttl;
348 get_word(buf1, sizeof(buf1), &p); /* port */
349 rtsp_st->sdp_port = atoi(buf1);
351 get_word(buf1, sizeof(buf1), &p); /* protocol (ignored) */
353 /* XXX: handle list of formats */
354 get_word(buf1, sizeof(buf1), &p); /* format list */
355 rtsp_st->sdp_payload_type = atoi(buf1);
357 if (!strcmp(ff_rtp_enc_name(rtsp_st->sdp_payload_type), "MP2T")) {
358 /* no corresponding stream */
360 st = avformat_new_stream(s, NULL);
363 st->id = rt->nb_rtsp_streams - 1;
364 rtsp_st->stream_index = st->index;
365 st->codec->codec_type = codec_type;
366 if (rtsp_st->sdp_payload_type < RTP_PT_PRIVATE) {
367 RTPDynamicProtocolHandler *handler;
368 /* if standard payload type, we can find the codec right now */
369 ff_rtp_get_codec_info(st->codec, rtsp_st->sdp_payload_type);
370 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
371 st->codec->sample_rate > 0)
372 av_set_pts_info(st, 32, 1, st->codec->sample_rate);
373 /* Even static payload types may need a custom depacketizer */
374 handler = ff_rtp_handler_find_by_id(
375 rtsp_st->sdp_payload_type, st->codec->codec_type);
376 init_rtp_handler(handler, rtsp_st, st->codec);
379 /* put a default control url */
380 av_strlcpy(rtsp_st->control_url, rt->control_uri,
381 sizeof(rtsp_st->control_url));
384 if (av_strstart(p, "control:", &p)) {
385 if (s->nb_streams == 0) {
386 if (!strncmp(p, "rtsp://", 7))
387 av_strlcpy(rt->control_uri, p,
388 sizeof(rt->control_uri));
391 /* get the control url */
392 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
394 /* XXX: may need to add full url resolution */
395 av_url_split(proto, sizeof(proto), NULL, 0, NULL, 0,
397 if (proto[0] == '\0') {
398 /* relative control URL */
399 if (rtsp_st->control_url[strlen(rtsp_st->control_url)-1]!='/')
400 av_strlcat(rtsp_st->control_url, "/",
401 sizeof(rtsp_st->control_url));
402 av_strlcat(rtsp_st->control_url, p,
403 sizeof(rtsp_st->control_url));
405 av_strlcpy(rtsp_st->control_url, p,
406 sizeof(rtsp_st->control_url));
408 } else if (av_strstart(p, "rtpmap:", &p) && s->nb_streams > 0) {
409 /* NOTE: rtpmap is only supported AFTER the 'm=' tag */
410 get_word(buf1, sizeof(buf1), &p);
411 payload_type = atoi(buf1);
412 st = s->streams[s->nb_streams - 1];
413 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
414 sdp_parse_rtpmap(s, st, rtsp_st, payload_type, p);
415 } else if (av_strstart(p, "fmtp:", &p) ||
416 av_strstart(p, "framesize:", &p)) {
417 /* NOTE: fmtp is only supported AFTER the 'a=rtpmap:xxx' tag */
418 // let dynamic protocol handlers have a stab at the line.
419 get_word(buf1, sizeof(buf1), &p);
420 payload_type = atoi(buf1);
421 for (i = 0; i < rt->nb_rtsp_streams; i++) {
422 rtsp_st = rt->rtsp_streams[i];
423 if (rtsp_st->sdp_payload_type == payload_type &&
424 rtsp_st->dynamic_handler &&
425 rtsp_st->dynamic_handler->parse_sdp_a_line)
426 rtsp_st->dynamic_handler->parse_sdp_a_line(s, i,
427 rtsp_st->dynamic_protocol_context, buf);
429 } else if (av_strstart(p, "range:", &p)) {
432 // this is so that seeking on a streamed file can work.
433 rtsp_parse_range_npt(p, &start, &end);
434 s->start_time = start;
435 /* AV_NOPTS_VALUE means live broadcast (and can't seek) */
436 s->duration = (end == AV_NOPTS_VALUE) ?
437 AV_NOPTS_VALUE : end - start;
438 } else if (av_strstart(p, "IsRealDataType:integer;",&p)) {
440 rt->transport = RTSP_TRANSPORT_RDT;
441 } else if (av_strstart(p, "SampleRate:integer;", &p) &&
443 st = s->streams[s->nb_streams - 1];
444 st->codec->sample_rate = atoi(p);
446 if (rt->server_type == RTSP_SERVER_WMS)
447 ff_wms_parse_sdp_a_line(s, p);
448 if (s->nb_streams > 0) {
449 if (rt->server_type == RTSP_SERVER_REAL)
450 ff_real_parse_sdp_a_line(s, s->nb_streams - 1, p);
452 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
453 if (rtsp_st->dynamic_handler &&
454 rtsp_st->dynamic_handler->parse_sdp_a_line)
455 rtsp_st->dynamic_handler->parse_sdp_a_line(s,
457 rtsp_st->dynamic_protocol_context, buf);
464 int ff_sdp_parse(AVFormatContext *s, const char *content)
466 RTSPState *rt = s->priv_data;
469 /* Some SDP lines, particularly for Realmedia or ASF RTSP streams,
470 * contain long SDP lines containing complete ASF Headers (several
471 * kB) or arrays of MDPR (RM stream descriptor) headers plus
472 * "rulebooks" describing their properties. Therefore, the SDP line
475 * The Vorbis FMTP line can be up to 16KB - see xiph_parse_sdp_line
476 * in rtpdec_xiph.c. */
478 SDPParseState sdp_parse_state, *s1 = &sdp_parse_state;
480 memset(s1, 0, sizeof(SDPParseState));
483 p += strspn(p, SPACE_CHARS);
491 /* get the content */
493 while (*p != '\n' && *p != '\r' && *p != '\0') {
494 if ((q - buf) < sizeof(buf) - 1)
499 sdp_parse_line(s, s1, letter, buf);
501 while (*p != '\n' && *p != '\0')
506 rt->p = av_malloc(sizeof(struct pollfd)*2*(rt->nb_rtsp_streams+1));
507 if (!rt->p) return AVERROR(ENOMEM);
510 #endif /* CONFIG_RTPDEC */
512 void ff_rtsp_undo_setup(AVFormatContext *s)
514 RTSPState *rt = s->priv_data;
517 for (i = 0; i < rt->nb_rtsp_streams; i++) {
518 RTSPStream *rtsp_st = rt->rtsp_streams[i];
521 if (rtsp_st->transport_priv) {
523 AVFormatContext *rtpctx = rtsp_st->transport_priv;
524 av_write_trailer(rtpctx);
525 if (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
527 avio_close_dyn_buf(rtpctx->pb, &ptr);
530 avio_close(rtpctx->pb);
532 avformat_free_context(rtpctx);
533 } else if (rt->transport == RTSP_TRANSPORT_RDT && CONFIG_RTPDEC)
534 ff_rdt_parse_close(rtsp_st->transport_priv);
535 else if (CONFIG_RTPDEC)
536 ff_rtp_parse_close(rtsp_st->transport_priv);
538 rtsp_st->transport_priv = NULL;
539 if (rtsp_st->rtp_handle)
540 ffurl_close(rtsp_st->rtp_handle);
541 rtsp_st->rtp_handle = NULL;
545 /* close and free RTSP streams */
546 void ff_rtsp_close_streams(AVFormatContext *s)
548 RTSPState *rt = s->priv_data;
552 ff_rtsp_undo_setup(s);
553 for (i = 0; i < rt->nb_rtsp_streams; i++) {
554 rtsp_st = rt->rtsp_streams[i];
556 if (rtsp_st->dynamic_handler && rtsp_st->dynamic_protocol_context)
557 rtsp_st->dynamic_handler->free(
558 rtsp_st->dynamic_protocol_context);
562 av_free(rt->rtsp_streams);
564 av_close_input_stream (rt->asf_ctx);
568 av_free(rt->recvbuf);
571 static int rtsp_open_transport_ctx(AVFormatContext *s, RTSPStream *rtsp_st)
573 RTSPState *rt = s->priv_data;
576 /* open the RTP context */
577 if (rtsp_st->stream_index >= 0)
578 st = s->streams[rtsp_st->stream_index];
580 s->ctx_flags |= AVFMTCTX_NOHEADER;
582 if (s->oformat && CONFIG_RTSP_MUXER) {
583 rtsp_st->transport_priv = ff_rtp_chain_mux_open(s, st,
585 RTSP_TCP_MAX_PACKET_SIZE);
586 /* Ownership of rtp_handle is passed to the rtp mux context */
587 rtsp_st->rtp_handle = NULL;
588 } else if (rt->transport == RTSP_TRANSPORT_RDT && CONFIG_RTPDEC)
589 rtsp_st->transport_priv = ff_rdt_parse_open(s, st->index,
590 rtsp_st->dynamic_protocol_context,
591 rtsp_st->dynamic_handler);
592 else if (CONFIG_RTPDEC)
593 rtsp_st->transport_priv = ff_rtp_parse_open(s, st, rtsp_st->rtp_handle,
594 rtsp_st->sdp_payload_type,
595 (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP || !s->max_delay)
596 ? 0 : RTP_REORDER_QUEUE_DEFAULT_SIZE);
598 if (!rtsp_st->transport_priv) {
599 return AVERROR(ENOMEM);
600 } else if (rt->transport != RTSP_TRANSPORT_RDT && CONFIG_RTPDEC) {
601 if (rtsp_st->dynamic_handler) {
602 ff_rtp_parse_set_dynamic_protocol(rtsp_st->transport_priv,
603 rtsp_st->dynamic_protocol_context,
604 rtsp_st->dynamic_handler);
611 #if CONFIG_RTSP_DEMUXER || CONFIG_RTSP_MUXER
612 static void rtsp_parse_range(int *min_ptr, int *max_ptr, const char **pp)
618 p += strspn(p, SPACE_CHARS);
619 v = strtol(p, (char **)&p, 10);
623 v = strtol(p, (char **)&p, 10);
632 /* XXX: only one transport specification is parsed */
633 static void rtsp_parse_transport(RTSPMessageHeader *reply, const char *p)
635 char transport_protocol[16];
637 char lower_transport[16];
639 RTSPTransportField *th;
642 reply->nb_transports = 0;
645 p += strspn(p, SPACE_CHARS);
649 th = &reply->transports[reply->nb_transports];
651 get_word_sep(transport_protocol, sizeof(transport_protocol),
653 if (!strcasecmp (transport_protocol, "rtp")) {
654 get_word_sep(profile, sizeof(profile), "/;,", &p);
655 lower_transport[0] = '\0';
656 /* rtp/avp/<protocol> */
658 get_word_sep(lower_transport, sizeof(lower_transport),
661 th->transport = RTSP_TRANSPORT_RTP;
662 } else if (!strcasecmp (transport_protocol, "x-pn-tng") ||
663 !strcasecmp (transport_protocol, "x-real-rdt")) {
664 /* x-pn-tng/<protocol> */
665 get_word_sep(lower_transport, sizeof(lower_transport), "/;,", &p);
667 th->transport = RTSP_TRANSPORT_RDT;
669 if (!strcasecmp(lower_transport, "TCP"))
670 th->lower_transport = RTSP_LOWER_TRANSPORT_TCP;
672 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP;
676 /* get each parameter */
677 while (*p != '\0' && *p != ',') {
678 get_word_sep(parameter, sizeof(parameter), "=;,", &p);
679 if (!strcmp(parameter, "port")) {
682 rtsp_parse_range(&th->port_min, &th->port_max, &p);
684 } else if (!strcmp(parameter, "client_port")) {
687 rtsp_parse_range(&th->client_port_min,
688 &th->client_port_max, &p);
690 } else if (!strcmp(parameter, "server_port")) {
693 rtsp_parse_range(&th->server_port_min,
694 &th->server_port_max, &p);
696 } else if (!strcmp(parameter, "interleaved")) {
699 rtsp_parse_range(&th->interleaved_min,
700 &th->interleaved_max, &p);
702 } else if (!strcmp(parameter, "multicast")) {
703 if (th->lower_transport == RTSP_LOWER_TRANSPORT_UDP)
704 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP_MULTICAST;
705 } else if (!strcmp(parameter, "ttl")) {
708 th->ttl = strtol(p, (char **)&p, 10);
710 } else if (!strcmp(parameter, "destination")) {
713 get_word_sep(buf, sizeof(buf), ";,", &p);
714 get_sockaddr(buf, &th->destination);
716 } else if (!strcmp(parameter, "source")) {
719 get_word_sep(buf, sizeof(buf), ";,", &p);
720 av_strlcpy(th->source, buf, sizeof(th->source));
724 while (*p != ';' && *p != '\0' && *p != ',')
732 reply->nb_transports++;
736 static void handle_rtp_info(RTSPState *rt, const char *url,
737 uint32_t seq, uint32_t rtptime)
740 if (!rtptime || !url[0])
742 if (rt->transport != RTSP_TRANSPORT_RTP)
744 for (i = 0; i < rt->nb_rtsp_streams; i++) {
745 RTSPStream *rtsp_st = rt->rtsp_streams[i];
746 RTPDemuxContext *rtpctx = rtsp_st->transport_priv;
749 if (!strcmp(rtsp_st->control_url, url)) {
750 rtpctx->base_timestamp = rtptime;
756 static void rtsp_parse_rtp_info(RTSPState *rt, const char *p)
759 char key[20], value[1024], url[1024] = "";
760 uint32_t seq = 0, rtptime = 0;
763 p += strspn(p, SPACE_CHARS);
766 get_word_sep(key, sizeof(key), "=", &p);
770 get_word_sep(value, sizeof(value), ";, ", &p);
772 if (!strcmp(key, "url"))
773 av_strlcpy(url, value, sizeof(url));
774 else if (!strcmp(key, "seq"))
775 seq = strtoul(value, NULL, 10);
776 else if (!strcmp(key, "rtptime"))
777 rtptime = strtoul(value, NULL, 10);
779 handle_rtp_info(rt, url, seq, rtptime);
788 handle_rtp_info(rt, url, seq, rtptime);
791 void ff_rtsp_parse_line(RTSPMessageHeader *reply, const char *buf,
792 RTSPState *rt, const char *method)
796 /* NOTE: we do case independent match for broken servers */
798 if (av_stristart(p, "Session:", &p)) {
800 get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p);
801 if (av_stristart(p, ";timeout=", &p) &&
802 (t = strtol(p, NULL, 10)) > 0) {
805 } else if (av_stristart(p, "Content-Length:", &p)) {
806 reply->content_length = strtol(p, NULL, 10);
807 } else if (av_stristart(p, "Transport:", &p)) {
808 rtsp_parse_transport(reply, p);
809 } else if (av_stristart(p, "CSeq:", &p)) {
810 reply->seq = strtol(p, NULL, 10);
811 } else if (av_stristart(p, "Range:", &p)) {
812 rtsp_parse_range_npt(p, &reply->range_start, &reply->range_end);
813 } else if (av_stristart(p, "RealChallenge1:", &p)) {
814 p += strspn(p, SPACE_CHARS);
815 av_strlcpy(reply->real_challenge, p, sizeof(reply->real_challenge));
816 } else if (av_stristart(p, "Server:", &p)) {
817 p += strspn(p, SPACE_CHARS);
818 av_strlcpy(reply->server, p, sizeof(reply->server));
819 } else if (av_stristart(p, "Notice:", &p) ||
820 av_stristart(p, "X-Notice:", &p)) {
821 reply->notice = strtol(p, NULL, 10);
822 } else if (av_stristart(p, "Location:", &p)) {
823 p += strspn(p, SPACE_CHARS);
824 av_strlcpy(reply->location, p , sizeof(reply->location));
825 } else if (av_stristart(p, "WWW-Authenticate:", &p) && rt) {
826 p += strspn(p, SPACE_CHARS);
827 ff_http_auth_handle_header(&rt->auth_state, "WWW-Authenticate", p);
828 } else if (av_stristart(p, "Authentication-Info:", &p) && rt) {
829 p += strspn(p, SPACE_CHARS);
830 ff_http_auth_handle_header(&rt->auth_state, "Authentication-Info", p);
831 } else if (av_stristart(p, "Content-Base:", &p) && rt) {
832 p += strspn(p, SPACE_CHARS);
833 if (method && !strcmp(method, "DESCRIBE"))
834 av_strlcpy(rt->control_uri, p , sizeof(rt->control_uri));
835 } else if (av_stristart(p, "RTP-Info:", &p) && rt) {
836 p += strspn(p, SPACE_CHARS);
837 if (method && !strcmp(method, "PLAY"))
838 rtsp_parse_rtp_info(rt, p);
839 } else if (av_stristart(p, "Public:", &p) && rt) {
840 if (strstr(p, "GET_PARAMETER") &&
841 method && !strcmp(method, "OPTIONS"))
842 rt->get_parameter_supported = 1;
843 } else if (av_stristart(p, "x-Accept-Dynamic-Rate:", &p) && rt) {
844 p += strspn(p, SPACE_CHARS);
845 rt->accept_dynamic_rate = atoi(p);
849 /* skip a RTP/TCP interleaved packet */
850 void ff_rtsp_skip_packet(AVFormatContext *s)
852 RTSPState *rt = s->priv_data;
856 ret = ffurl_read_complete(rt->rtsp_hd, buf, 3);
859 len = AV_RB16(buf + 1);
861 av_dlog(s, "skipping RTP packet len=%d\n", len);
866 if (len1 > sizeof(buf))
868 ret = ffurl_read_complete(rt->rtsp_hd, buf, len1);
875 int ff_rtsp_read_reply(AVFormatContext *s, RTSPMessageHeader *reply,
876 unsigned char **content_ptr,
877 int return_on_interleaved_data, const char *method)
879 RTSPState *rt = s->priv_data;
880 char buf[4096], buf1[1024], *q;
883 int ret, content_length, line_count = 0;
884 unsigned char *content = NULL;
886 memset(reply, 0, sizeof(*reply));
888 /* parse reply (XXX: use buffers) */
889 rt->last_reply[0] = '\0';
893 ret = ffurl_read_complete(rt->rtsp_hd, &ch, 1);
894 av_dlog(s, "ret=%d c=%02x [%c]\n", ret, ch, ch);
900 /* XXX: only parse it if first char on line ? */
901 if (return_on_interleaved_data) {
904 ff_rtsp_skip_packet(s);
905 } else if (ch != '\r') {
906 if ((q - buf) < sizeof(buf) - 1)
912 av_dlog(s, "line='%s'\n", buf);
914 /* test if last line */
918 if (line_count == 0) {
920 get_word(buf1, sizeof(buf1), &p);
921 get_word(buf1, sizeof(buf1), &p);
922 reply->status_code = atoi(buf1);
923 av_strlcpy(reply->reason, p, sizeof(reply->reason));
925 ff_rtsp_parse_line(reply, p, rt, method);
926 av_strlcat(rt->last_reply, p, sizeof(rt->last_reply));
927 av_strlcat(rt->last_reply, "\n", sizeof(rt->last_reply));
932 if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0')
933 av_strlcpy(rt->session_id, reply->session_id, sizeof(rt->session_id));
935 content_length = reply->content_length;
936 if (content_length > 0) {
937 /* leave some room for a trailing '\0' (useful for simple parsing) */
938 content = av_malloc(content_length + 1);
939 ffurl_read_complete(rt->rtsp_hd, content, content_length);
940 content[content_length] = '\0';
943 *content_ptr = content;
947 if (rt->seq != reply->seq) {
948 av_log(s, AV_LOG_WARNING, "CSeq %d expected, %d received.\n",
949 rt->seq, reply->seq);
953 if (reply->notice == 2101 /* End-of-Stream Reached */ ||
954 reply->notice == 2104 /* Start-of-Stream Reached */ ||
955 reply->notice == 2306 /* Continuous Feed Terminated */) {
956 rt->state = RTSP_STATE_IDLE;
957 } else if (reply->notice >= 4400 && reply->notice < 5500) {
958 return AVERROR(EIO); /* data or server error */
959 } else if (reply->notice == 2401 /* Ticket Expired */ ||
960 (reply->notice >= 5500 && reply->notice < 5600) /* end of term */ )
961 return AVERROR(EPERM);
967 * Send a command to the RTSP server without waiting for the reply.
969 * @param s RTSP (de)muxer context
970 * @param method the method for the request
971 * @param url the target url for the request
972 * @param headers extra header lines to include in the request
973 * @param send_content if non-null, the data to send as request body content
974 * @param send_content_length the length of the send_content data, or 0 if
975 * send_content is null
977 * @return zero if success, nonzero otherwise
979 static int ff_rtsp_send_cmd_with_content_async(AVFormatContext *s,
980 const char *method, const char *url,
982 const unsigned char *send_content,
983 int send_content_length)
985 RTSPState *rt = s->priv_data;
986 char buf[4096], *out_buf;
987 char base64buf[AV_BASE64_SIZE(sizeof(buf))];
989 /* Add in RTSP headers */
992 snprintf(buf, sizeof(buf), "%s %s RTSP/1.0\r\n", method, url);
994 av_strlcat(buf, headers, sizeof(buf));
995 av_strlcatf(buf, sizeof(buf), "CSeq: %d\r\n", rt->seq);
996 if (rt->session_id[0] != '\0' && (!headers ||
997 !strstr(headers, "\nIf-Match:"))) {
998 av_strlcatf(buf, sizeof(buf), "Session: %s\r\n", rt->session_id);
1001 char *str = ff_http_auth_create_response(&rt->auth_state,
1002 rt->auth, url, method);
1004 av_strlcat(buf, str, sizeof(buf));
1007 if (send_content_length > 0 && send_content)
1008 av_strlcatf(buf, sizeof(buf), "Content-Length: %d\r\n", send_content_length);
1009 av_strlcat(buf, "\r\n", sizeof(buf));
1011 /* base64 encode rtsp if tunneling */
1012 if (rt->control_transport == RTSP_MODE_TUNNEL) {
1013 av_base64_encode(base64buf, sizeof(base64buf), buf, strlen(buf));
1014 out_buf = base64buf;
1017 av_dlog(s, "Sending:\n%s--\n", buf);
1019 ffurl_write(rt->rtsp_hd_out, out_buf, strlen(out_buf));
1020 if (send_content_length > 0 && send_content) {
1021 if (rt->control_transport == RTSP_MODE_TUNNEL) {
1022 av_log(s, AV_LOG_ERROR, "tunneling of RTSP requests "
1023 "with content data not supported\n");
1024 return AVERROR_PATCHWELCOME;
1026 ffurl_write(rt->rtsp_hd_out, send_content, send_content_length);
1028 rt->last_cmd_time = av_gettime();
1033 int ff_rtsp_send_cmd_async(AVFormatContext *s, const char *method,
1034 const char *url, const char *headers)
1036 return ff_rtsp_send_cmd_with_content_async(s, method, url, headers, NULL, 0);
1039 int ff_rtsp_send_cmd(AVFormatContext *s, const char *method, const char *url,
1040 const char *headers, RTSPMessageHeader *reply,
1041 unsigned char **content_ptr)
1043 return ff_rtsp_send_cmd_with_content(s, method, url, headers, reply,
1044 content_ptr, NULL, 0);
1047 int ff_rtsp_send_cmd_with_content(AVFormatContext *s,
1048 const char *method, const char *url,
1050 RTSPMessageHeader *reply,
1051 unsigned char **content_ptr,
1052 const unsigned char *send_content,
1053 int send_content_length)
1055 RTSPState *rt = s->priv_data;
1056 HTTPAuthType cur_auth_type;
1060 cur_auth_type = rt->auth_state.auth_type;
1061 if ((ret = ff_rtsp_send_cmd_with_content_async(s, method, url, header,
1063 send_content_length)))
1066 if ((ret = ff_rtsp_read_reply(s, reply, content_ptr, 0, method) ) < 0)
1069 if (reply->status_code == 401 && cur_auth_type == HTTP_AUTH_NONE &&
1070 rt->auth_state.auth_type != HTTP_AUTH_NONE)
1073 if (reply->status_code > 400){
1074 av_log(s, AV_LOG_ERROR, "method %s failed: %d%s\n",
1078 av_log(s, AV_LOG_DEBUG, "%s\n", rt->last_reply);
1084 int ff_rtsp_make_setup_request(AVFormatContext *s, const char *host, int port,
1085 int lower_transport, const char *real_challenge)
1087 RTSPState *rt = s->priv_data;
1088 int rtx, j, i, err, interleave = 0;
1089 RTSPStream *rtsp_st;
1090 RTSPMessageHeader reply1, *reply = &reply1;
1092 const char *trans_pref;
1094 if (rt->transport == RTSP_TRANSPORT_RDT)
1095 trans_pref = "x-pn-tng";
1097 trans_pref = "RTP/AVP";
1099 /* default timeout: 1 minute */
1102 /* for each stream, make the setup request */
1103 /* XXX: we assume the same server is used for the control of each
1106 for (j = RTSP_RTP_PORT_MIN, i = 0; i < rt->nb_rtsp_streams; ++i) {
1107 char transport[2048];
1110 * WMS serves all UDP data over a single connection, the RTX, which
1111 * isn't necessarily the first in the SDP but has to be the first
1112 * to be set up, else the second/third SETUP will fail with a 461.
1114 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP &&
1115 rt->server_type == RTSP_SERVER_WMS) {
1118 for (rtx = 0; rtx < rt->nb_rtsp_streams; rtx++) {
1119 int len = strlen(rt->rtsp_streams[rtx]->control_url);
1121 !strcmp(rt->rtsp_streams[rtx]->control_url + len - 4,
1125 if (rtx == rt->nb_rtsp_streams)
1126 return -1; /* no RTX found */
1127 rtsp_st = rt->rtsp_streams[rtx];
1129 rtsp_st = rt->rtsp_streams[i > rtx ? i : i - 1];
1131 rtsp_st = rt->rtsp_streams[i];
1134 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP) {
1137 if (rt->server_type == RTSP_SERVER_WMS && i > 1) {
1138 port = reply->transports[0].client_port_min;
1142 /* first try in specified port range */
1143 if (RTSP_RTP_PORT_MIN != 0) {
1144 while (j <= RTSP_RTP_PORT_MAX) {
1145 ff_url_join(buf, sizeof(buf), "rtp", NULL, host, -1,
1146 "?localport=%d", j);
1147 /* we will use two ports per rtp stream (rtp and rtcp) */
1149 if (ffurl_open(&rtsp_st->rtp_handle, buf, AVIO_FLAG_READ_WRITE) == 0)
1154 av_log(s, AV_LOG_ERROR, "Unable to open an input RTP port\n");
1159 port = ff_rtp_get_local_rtp_port(rtsp_st->rtp_handle);
1161 snprintf(transport, sizeof(transport) - 1,
1162 "%s/UDP;", trans_pref);
1163 if (rt->server_type != RTSP_SERVER_REAL)
1164 av_strlcat(transport, "unicast;", sizeof(transport));
1165 av_strlcatf(transport, sizeof(transport),
1166 "client_port=%d", port);
1167 if (rt->transport == RTSP_TRANSPORT_RTP &&
1168 !(rt->server_type == RTSP_SERVER_WMS && i > 0))
1169 av_strlcatf(transport, sizeof(transport), "-%d", port + 1);
1173 else if (lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
1174 /* For WMS streams, the application streams are only used for
1175 * UDP. When trying to set it up for TCP streams, the server
1176 * will return an error. Therefore, we skip those streams. */
1177 if (rt->server_type == RTSP_SERVER_WMS &&
1178 s->streams[rtsp_st->stream_index]->codec->codec_type ==
1181 snprintf(transport, sizeof(transport) - 1,
1182 "%s/TCP;", trans_pref);
1183 if (rt->transport != RTSP_TRANSPORT_RDT)
1184 av_strlcat(transport, "unicast;", sizeof(transport));
1185 av_strlcatf(transport, sizeof(transport),
1186 "interleaved=%d-%d",
1187 interleave, interleave + 1);
1191 else if (lower_transport == RTSP_LOWER_TRANSPORT_UDP_MULTICAST) {
1192 snprintf(transport, sizeof(transport) - 1,
1193 "%s/UDP;multicast", trans_pref);
1196 av_strlcat(transport, ";mode=receive", sizeof(transport));
1197 } else if (rt->server_type == RTSP_SERVER_REAL ||
1198 rt->server_type == RTSP_SERVER_WMS)
1199 av_strlcat(transport, ";mode=play", sizeof(transport));
1200 snprintf(cmd, sizeof(cmd),
1201 "Transport: %s\r\n",
1203 if (rt->accept_dynamic_rate)
1204 av_strlcat(cmd, "x-Dynamic-Rate: 0\r\n", sizeof(cmd));
1205 if (i == 0 && rt->server_type == RTSP_SERVER_REAL && CONFIG_RTPDEC) {
1206 char real_res[41], real_csum[9];
1207 ff_rdt_calc_response_and_checksum(real_res, real_csum,
1209 av_strlcatf(cmd, sizeof(cmd),
1211 "RealChallenge2: %s, sd=%s\r\n",
1212 rt->session_id, real_res, real_csum);
1214 ff_rtsp_send_cmd(s, "SETUP", rtsp_st->control_url, cmd, reply, NULL);
1215 if (reply->status_code == 461 /* Unsupported protocol */ && i == 0) {
1218 } else if (reply->status_code != RTSP_STATUS_OK ||
1219 reply->nb_transports != 1) {
1220 err = AVERROR_INVALIDDATA;
1224 /* XXX: same protocol for all streams is required */
1226 if (reply->transports[0].lower_transport != rt->lower_transport ||
1227 reply->transports[0].transport != rt->transport) {
1228 err = AVERROR_INVALIDDATA;
1232 rt->lower_transport = reply->transports[0].lower_transport;
1233 rt->transport = reply->transports[0].transport;
1236 /* Fail if the server responded with another lower transport mode
1237 * than what we requested. */
1238 if (reply->transports[0].lower_transport != lower_transport) {
1239 av_log(s, AV_LOG_ERROR, "Nonmatching transport in server reply\n");
1240 err = AVERROR_INVALIDDATA;
1244 switch(reply->transports[0].lower_transport) {
1245 case RTSP_LOWER_TRANSPORT_TCP:
1246 rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
1247 rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
1250 case RTSP_LOWER_TRANSPORT_UDP: {
1251 char url[1024], options[30] = "";
1253 if (rt->rtsp_flags & RTSP_FLAG_FILTER_SRC)
1254 av_strlcpy(options, "?connect=1", sizeof(options));
1255 /* Use source address if specified */
1256 if (reply->transports[0].source[0]) {
1257 ff_url_join(url, sizeof(url), "rtp", NULL,
1258 reply->transports[0].source,
1259 reply->transports[0].server_port_min, "%s", options);
1261 ff_url_join(url, sizeof(url), "rtp", NULL, host,
1262 reply->transports[0].server_port_min, "%s", options);
1264 if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) &&
1265 ff_rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
1266 err = AVERROR_INVALIDDATA;
1269 /* Try to initialize the connection state in a
1270 * potential NAT router by sending dummy packets.
1271 * RTP/RTCP dummy packets are used for RDT, too.
1273 if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) && s->iformat &&
1275 ff_rtp_send_punch_packets(rtsp_st->rtp_handle);
1278 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST: {
1279 char url[1024], namebuf[50];
1280 struct sockaddr_storage addr;
1283 if (reply->transports[0].destination.ss_family) {
1284 addr = reply->transports[0].destination;
1285 port = reply->transports[0].port_min;
1286 ttl = reply->transports[0].ttl;
1288 addr = rtsp_st->sdp_ip;
1289 port = rtsp_st->sdp_port;
1290 ttl = rtsp_st->sdp_ttl;
1292 getnameinfo((struct sockaddr*) &addr, sizeof(addr),
1293 namebuf, sizeof(namebuf), NULL, 0, NI_NUMERICHOST);
1294 ff_url_join(url, sizeof(url), "rtp", NULL, namebuf,
1295 port, "?ttl=%d", ttl);
1296 if (ffurl_open(&rtsp_st->rtp_handle, url, AVIO_FLAG_READ_WRITE) < 0) {
1297 err = AVERROR_INVALIDDATA;
1304 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
1308 if (reply->timeout > 0)
1309 rt->timeout = reply->timeout;
1311 if (rt->server_type == RTSP_SERVER_REAL)
1312 rt->need_subscription = 1;
1317 ff_rtsp_undo_setup(s);
1321 void ff_rtsp_close_connections(AVFormatContext *s)
1323 RTSPState *rt = s->priv_data;
1324 if (rt->rtsp_hd_out != rt->rtsp_hd) ffurl_close(rt->rtsp_hd_out);
1325 ffurl_close(rt->rtsp_hd);
1326 rt->rtsp_hd = rt->rtsp_hd_out = NULL;
1329 int ff_rtsp_connect(AVFormatContext *s)
1331 RTSPState *rt = s->priv_data;
1332 char host[1024], path[1024], tcpname[1024], cmd[2048], auth[128];
1333 char *option_list, *option, *filename;
1334 int port, err, tcp_fd;
1335 RTSPMessageHeader reply1 = {0}, *reply = &reply1;
1336 int lower_transport_mask = 0;
1337 char real_challenge[64] = "";
1338 struct sockaddr_storage peer;
1339 socklen_t peer_len = sizeof(peer);
1341 if (!ff_network_init())
1342 return AVERROR(EIO);
1344 rt->control_transport = RTSP_MODE_PLAIN;
1345 if (rt->lower_transport_mask & (1 << RTSP_LOWER_TRANSPORT_HTTP)) {
1346 rt->lower_transport_mask = 1 << RTSP_LOWER_TRANSPORT_TCP;
1347 rt->control_transport = RTSP_MODE_TUNNEL;
1349 /* Only pass through valid flags from here */
1350 rt->lower_transport_mask &= (1 << RTSP_LOWER_TRANSPORT_NB) - 1;
1353 lower_transport_mask = rt->lower_transport_mask;
1354 /* extract hostname and port */
1355 av_url_split(NULL, 0, auth, sizeof(auth),
1356 host, sizeof(host), &port, path, sizeof(path), s->filename);
1358 av_strlcpy(rt->auth, auth, sizeof(rt->auth));
1361 port = RTSP_DEFAULT_PORT;
1363 #if FF_API_RTSP_URL_OPTIONS
1364 /* search for options */
1365 option_list = strrchr(path, '?');
1367 /* Strip out the RTSP specific options, write out the rest of
1368 * the options back into the same string. */
1369 filename = option_list;
1370 while (option_list) {
1372 /* move the option pointer */
1373 option = ++option_list;
1374 option_list = strchr(option_list, '&');
1378 /* handle the options */
1379 if (!strcmp(option, "udp")) {
1380 lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_UDP);
1381 } else if (!strcmp(option, "multicast")) {
1382 lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_UDP_MULTICAST);
1383 } else if (!strcmp(option, "tcp")) {
1384 lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_TCP);
1385 } else if(!strcmp(option, "http")) {
1386 lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_TCP);
1387 rt->control_transport = RTSP_MODE_TUNNEL;
1388 } else if (!strcmp(option, "filter_src")) {
1389 rt->rtsp_flags |= RTSP_FLAG_FILTER_SRC;
1391 /* Write options back into the buffer, using memmove instead
1392 * of strcpy since the strings may overlap. */
1393 int len = strlen(option);
1394 memmove(++filename, option, len);
1396 if (option_list) *filename = '&';
1400 av_log(s, AV_LOG_WARNING, "Options passed via URL are "
1401 "deprecated, use -rtsp_transport "
1402 "and -rtsp_flags instead.\n");
1408 if (!lower_transport_mask)
1409 lower_transport_mask = (1 << RTSP_LOWER_TRANSPORT_NB) - 1;
1412 /* Only UDP or TCP - UDP multicast isn't supported. */
1413 lower_transport_mask &= (1 << RTSP_LOWER_TRANSPORT_UDP) |
1414 (1 << RTSP_LOWER_TRANSPORT_TCP);
1415 if (!lower_transport_mask || rt->control_transport == RTSP_MODE_TUNNEL) {
1416 av_log(s, AV_LOG_ERROR, "Unsupported lower transport method, "
1417 "only UDP and TCP are supported for output.\n");
1418 err = AVERROR(EINVAL);
1423 /* Construct the URI used in request; this is similar to s->filename,
1424 * but with authentication credentials removed and RTSP specific options
1426 ff_url_join(rt->control_uri, sizeof(rt->control_uri), "rtsp", NULL,
1427 host, port, "%s", path);
1429 if (rt->control_transport == RTSP_MODE_TUNNEL) {
1430 /* set up initial handshake for tunneling */
1431 char httpname[1024];
1432 char sessioncookie[17];
1435 ff_url_join(httpname, sizeof(httpname), "http", auth, host, port, "%s", path);
1436 snprintf(sessioncookie, sizeof(sessioncookie), "%08x%08x",
1437 av_get_random_seed(), av_get_random_seed());
1440 if (ffurl_alloc(&rt->rtsp_hd, httpname, AVIO_FLAG_READ) < 0) {
1445 /* generate GET headers */
1446 snprintf(headers, sizeof(headers),
1447 "x-sessioncookie: %s\r\n"
1448 "Accept: application/x-rtsp-tunnelled\r\n"
1449 "Pragma: no-cache\r\n"
1450 "Cache-Control: no-cache\r\n",
1452 ff_http_set_headers(rt->rtsp_hd, headers);
1454 /* complete the connection */
1455 if (ffurl_connect(rt->rtsp_hd)) {
1461 if (ffurl_alloc(&rt->rtsp_hd_out, httpname, AVIO_FLAG_WRITE) < 0 ) {
1466 /* generate POST headers */
1467 snprintf(headers, sizeof(headers),
1468 "x-sessioncookie: %s\r\n"
1469 "Content-Type: application/x-rtsp-tunnelled\r\n"
1470 "Pragma: no-cache\r\n"
1471 "Cache-Control: no-cache\r\n"
1472 "Content-Length: 32767\r\n"
1473 "Expires: Sun, 9 Jan 1972 00:00:00 GMT\r\n",
1475 ff_http_set_headers(rt->rtsp_hd_out, headers);
1476 ff_http_set_chunked_transfer_encoding(rt->rtsp_hd_out, 0);
1478 /* Initialize the authentication state for the POST session. The HTTP
1479 * protocol implementation doesn't properly handle multi-pass
1480 * authentication for POST requests, since it would require one of
1482 * - implementing Expect: 100-continue, which many HTTP servers
1483 * don't support anyway, even less the RTSP servers that do HTTP
1485 * - sending the whole POST data until getting a 401 reply specifying
1486 * what authentication method to use, then resending all that data
1487 * - waiting for potential 401 replies directly after sending the
1488 * POST header (waiting for some unspecified time)
1489 * Therefore, we copy the full auth state, which works for both basic
1490 * and digest. (For digest, we would have to synchronize the nonce
1491 * count variable between the two sessions, if we'd do more requests
1492 * with the original session, though.)
1494 ff_http_init_auth_state(rt->rtsp_hd_out, rt->rtsp_hd);
1496 /* complete the connection */
1497 if (ffurl_connect(rt->rtsp_hd_out)) {
1502 /* open the tcp connection */
1503 ff_url_join(tcpname, sizeof(tcpname), "tcp", NULL, host, port, NULL);
1504 if (ffurl_open(&rt->rtsp_hd, tcpname, AVIO_FLAG_READ_WRITE) < 0) {
1508 rt->rtsp_hd_out = rt->rtsp_hd;
1512 tcp_fd = ffurl_get_file_handle(rt->rtsp_hd);
1513 if (!getpeername(tcp_fd, (struct sockaddr*) &peer, &peer_len)) {
1514 getnameinfo((struct sockaddr*) &peer, peer_len, host, sizeof(host),
1515 NULL, 0, NI_NUMERICHOST);
1518 /* request options supported by the server; this also detects server
1520 for (rt->server_type = RTSP_SERVER_RTP;;) {
1522 if (rt->server_type == RTSP_SERVER_REAL)
1525 * The following entries are required for proper
1526 * streaming from a Realmedia server. They are
1527 * interdependent in some way although we currently
1528 * don't quite understand how. Values were copied
1529 * from mplayer SVN r23589.
1530 * ClientChallenge is a 16-byte ID in hex
1531 * CompanyID is a 16-byte ID in base64
1533 "ClientChallenge: 9e26d33f2984236010ef6253fb1887f7\r\n"
1534 "PlayerStarttime: [28/03/2003:22:50:23 00:00]\r\n"
1535 "CompanyID: KnKV4M4I/B2FjJ1TToLycw==\r\n"
1536 "GUID: 00000000-0000-0000-0000-000000000000\r\n",
1538 ff_rtsp_send_cmd(s, "OPTIONS", rt->control_uri, cmd, reply, NULL);
1539 if (reply->status_code != RTSP_STATUS_OK) {
1540 err = AVERROR_INVALIDDATA;
1544 /* detect server type if not standard-compliant RTP */
1545 if (rt->server_type != RTSP_SERVER_REAL && reply->real_challenge[0]) {
1546 rt->server_type = RTSP_SERVER_REAL;
1548 } else if (!strncasecmp(reply->server, "WMServer/", 9)) {
1549 rt->server_type = RTSP_SERVER_WMS;
1550 } else if (rt->server_type == RTSP_SERVER_REAL)
1551 strcpy(real_challenge, reply->real_challenge);
1555 if (s->iformat && CONFIG_RTSP_DEMUXER)
1556 err = ff_rtsp_setup_input_streams(s, reply);
1557 else if (CONFIG_RTSP_MUXER)
1558 err = ff_rtsp_setup_output_streams(s, host);
1563 int lower_transport = ff_log2_tab[lower_transport_mask &
1564 ~(lower_transport_mask - 1)];
1566 err = ff_rtsp_make_setup_request(s, host, port, lower_transport,
1567 rt->server_type == RTSP_SERVER_REAL ?
1568 real_challenge : NULL);
1571 lower_transport_mask &= ~(1 << lower_transport);
1572 if (lower_transport_mask == 0 && err == 1) {
1573 err = AVERROR(EPROTONOSUPPORT);
1578 rt->lower_transport_mask = lower_transport_mask;
1579 av_strlcpy(rt->real_challenge, real_challenge, sizeof(rt->real_challenge));
1580 rt->state = RTSP_STATE_IDLE;
1581 rt->seek_timestamp = 0; /* default is to start stream at position zero */
1584 ff_rtsp_close_streams(s);
1585 ff_rtsp_close_connections(s);
1586 if (reply->status_code >=300 && reply->status_code < 400 && s->iformat) {
1587 av_strlcpy(s->filename, reply->location, sizeof(s->filename));
1588 av_log(s, AV_LOG_INFO, "Status %d: Redirecting to %s\n",
1596 #endif /* CONFIG_RTSP_DEMUXER || CONFIG_RTSP_MUXER */
1599 static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1600 uint8_t *buf, int buf_size, int64_t wait_end)
1602 RTSPState *rt = s->priv_data;
1603 RTSPStream *rtsp_st;
1604 int n, i, ret, tcp_fd, timeout_cnt = 0;
1606 struct pollfd *p = rt->p;
1609 if (url_interrupt_cb())
1610 return AVERROR_EXIT;
1611 if (wait_end && wait_end - av_gettime() < 0)
1612 return AVERROR(EAGAIN);
1615 tcp_fd = ffurl_get_file_handle(rt->rtsp_hd);
1616 p[max_p].fd = tcp_fd;
1617 p[max_p++].events = POLLIN;
1621 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1622 rtsp_st = rt->rtsp_streams[i];
1623 if (rtsp_st->rtp_handle) {
1624 p[max_p].fd = ffurl_get_file_handle(rtsp_st->rtp_handle);
1625 p[max_p++].events = POLLIN;
1626 p[max_p].fd = ff_rtp_get_rtcp_file_handle(rtsp_st->rtp_handle);
1627 p[max_p++].events = POLLIN;
1630 n = poll(p, max_p, POLL_TIMEOUT_MS);
1632 int j = 1 - (tcp_fd == -1);
1634 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1635 rtsp_st = rt->rtsp_streams[i];
1636 if (rtsp_st->rtp_handle) {
1637 if (p[j].revents & POLLIN || p[j+1].revents & POLLIN) {
1638 ret = ffurl_read(rtsp_st->rtp_handle, buf, buf_size);
1640 *prtsp_st = rtsp_st;
1647 #if CONFIG_RTSP_DEMUXER
1648 if (tcp_fd != -1 && p[0].revents & POLLIN) {
1649 RTSPMessageHeader reply;
1651 ret = ff_rtsp_read_reply(s, &reply, NULL, 0, NULL);
1654 /* XXX: parse message */
1655 if (rt->state != RTSP_STATE_STREAMING)
1659 } else if (n == 0 && ++timeout_cnt >= MAX_TIMEOUTS) {
1660 return AVERROR(ETIMEDOUT);
1661 } else if (n < 0 && errno != EINTR)
1662 return AVERROR(errno);
1666 int ff_rtsp_fetch_packet(AVFormatContext *s, AVPacket *pkt)
1668 RTSPState *rt = s->priv_data;
1670 RTSPStream *rtsp_st, *first_queue_st = NULL;
1671 int64_t wait_end = 0;
1673 if (rt->nb_byes == rt->nb_rtsp_streams)
1676 /* get next frames from the same RTP packet */
1677 if (rt->cur_transport_priv) {
1678 if (rt->transport == RTSP_TRANSPORT_RDT) {
1679 ret = ff_rdt_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
1681 ret = ff_rtp_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
1683 rt->cur_transport_priv = NULL;
1685 } else if (ret == 1) {
1688 rt->cur_transport_priv = NULL;
1691 if (rt->transport == RTSP_TRANSPORT_RTP) {
1693 int64_t first_queue_time = 0;
1694 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1695 RTPDemuxContext *rtpctx = rt->rtsp_streams[i]->transport_priv;
1699 queue_time = ff_rtp_queued_packet_time(rtpctx);
1700 if (queue_time && (queue_time - first_queue_time < 0 ||
1701 !first_queue_time)) {
1702 first_queue_time = queue_time;
1703 first_queue_st = rt->rtsp_streams[i];
1706 if (first_queue_time)
1707 wait_end = first_queue_time + s->max_delay;
1710 /* read next RTP packet */
1713 rt->recvbuf = av_malloc(RECVBUF_SIZE);
1715 return AVERROR(ENOMEM);
1718 switch(rt->lower_transport) {
1720 #if CONFIG_RTSP_DEMUXER
1721 case RTSP_LOWER_TRANSPORT_TCP:
1722 len = ff_rtsp_tcp_read_packet(s, &rtsp_st, rt->recvbuf, RECVBUF_SIZE);
1725 case RTSP_LOWER_TRANSPORT_UDP:
1726 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
1727 len = udp_read_packet(s, &rtsp_st, rt->recvbuf, RECVBUF_SIZE, wait_end);
1728 if (len > 0 && rtsp_st->transport_priv && rt->transport == RTSP_TRANSPORT_RTP)
1729 ff_rtp_check_and_send_back_rr(rtsp_st->transport_priv, len);
1732 if (len == AVERROR(EAGAIN) && first_queue_st &&
1733 rt->transport == RTSP_TRANSPORT_RTP) {
1734 rtsp_st = first_queue_st;
1735 ret = ff_rtp_parse_packet(rtsp_st->transport_priv, pkt, NULL, 0);
1742 if (rt->transport == RTSP_TRANSPORT_RDT) {
1743 ret = ff_rdt_parse_packet(rtsp_st->transport_priv, pkt, &rt->recvbuf, len);
1745 ret = ff_rtp_parse_packet(rtsp_st->transport_priv, pkt, &rt->recvbuf, len);
1747 /* Either bad packet, or a RTCP packet. Check if the
1748 * first_rtcp_ntp_time field was initialized. */
1749 RTPDemuxContext *rtpctx = rtsp_st->transport_priv;
1750 if (rtpctx->first_rtcp_ntp_time != AV_NOPTS_VALUE) {
1751 /* first_rtcp_ntp_time has been initialized for this stream,
1752 * copy the same value to all other uninitialized streams,
1753 * in order to map their timestamp origin to the same ntp time
1756 AVStream *st = NULL;
1757 if (rtsp_st->stream_index >= 0)
1758 st = s->streams[rtsp_st->stream_index];
1759 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1760 RTPDemuxContext *rtpctx2 = rt->rtsp_streams[i]->transport_priv;
1761 AVStream *st2 = NULL;
1762 if (rt->rtsp_streams[i]->stream_index >= 0)
1763 st2 = s->streams[rt->rtsp_streams[i]->stream_index];
1764 if (rtpctx2 && st && st2 &&
1765 rtpctx2->first_rtcp_ntp_time == AV_NOPTS_VALUE) {
1766 rtpctx2->first_rtcp_ntp_time = rtpctx->first_rtcp_ntp_time;
1767 rtpctx2->rtcp_ts_offset = av_rescale_q(
1768 rtpctx->rtcp_ts_offset, st->time_base,
1773 if (ret == -RTCP_BYE) {
1776 av_log(s, AV_LOG_DEBUG, "Received BYE for stream %d (%d/%d)\n",
1777 rtsp_st->stream_index, rt->nb_byes, rt->nb_rtsp_streams);
1779 if (rt->nb_byes == rt->nb_rtsp_streams)
1788 /* more packets may follow, so we save the RTP context */
1789 rt->cur_transport_priv = rtsp_st->transport_priv;
1793 #endif /* CONFIG_RTPDEC */
1795 #if CONFIG_SDP_DEMUXER
1796 static int sdp_probe(AVProbeData *p1)
1798 const char *p = p1->buf, *p_end = p1->buf + p1->buf_size;
1800 /* we look for a line beginning "c=IN IP" */
1801 while (p < p_end && *p != '\0') {
1802 if (p + sizeof("c=IN IP") - 1 < p_end &&
1803 av_strstart(p, "c=IN IP", NULL))
1804 return AVPROBE_SCORE_MAX / 2;
1806 while (p < p_end - 1 && *p != '\n') p++;
1815 static int sdp_read_header(AVFormatContext *s, AVFormatParameters *ap)
1817 RTSPState *rt = s->priv_data;
1818 RTSPStream *rtsp_st;
1823 if (!ff_network_init())
1824 return AVERROR(EIO);
1826 /* read the whole sdp file */
1827 /* XXX: better loading */
1828 content = av_malloc(SDP_MAX_SIZE);
1829 size = avio_read(s->pb, content, SDP_MAX_SIZE - 1);
1832 return AVERROR_INVALIDDATA;
1834 content[size] ='\0';
1836 err = ff_sdp_parse(s, content);
1840 /* open each RTP stream */
1841 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1843 rtsp_st = rt->rtsp_streams[i];
1845 getnameinfo((struct sockaddr*) &rtsp_st->sdp_ip, sizeof(rtsp_st->sdp_ip),
1846 namebuf, sizeof(namebuf), NULL, 0, NI_NUMERICHOST);
1847 ff_url_join(url, sizeof(url), "rtp", NULL,
1848 namebuf, rtsp_st->sdp_port,
1849 "?localport=%d&ttl=%d&connect=%d", rtsp_st->sdp_port,
1851 rt->rtsp_flags & RTSP_FLAG_FILTER_SRC ? 1 : 0);
1852 if (ffurl_open(&rtsp_st->rtp_handle, url, AVIO_FLAG_READ_WRITE) < 0) {
1853 err = AVERROR_INVALIDDATA;
1856 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
1861 ff_rtsp_close_streams(s);
1866 static int sdp_read_close(AVFormatContext *s)
1868 ff_rtsp_close_streams(s);
1873 static const AVClass sdp_demuxer_class = {
1874 .class_name = "SDP demuxer",
1875 .item_name = av_default_item_name,
1876 .option = sdp_options,
1877 .version = LIBAVUTIL_VERSION_INT,
1880 AVInputFormat ff_sdp_demuxer = {
1882 .long_name = NULL_IF_CONFIG_SMALL("SDP"),
1883 .priv_data_size = sizeof(RTSPState),
1884 .read_probe = sdp_probe,
1885 .read_header = sdp_read_header,
1886 .read_packet = ff_rtsp_fetch_packet,
1887 .read_close = sdp_read_close,
1888 .priv_class = &sdp_demuxer_class
1890 #endif /* CONFIG_SDP_DEMUXER */
1892 #if CONFIG_RTP_DEMUXER
1893 static int rtp_probe(AVProbeData *p)
1895 if (av_strstart(p->filename, "rtp:", NULL))
1896 return AVPROBE_SCORE_MAX;
1900 static int rtp_read_header(AVFormatContext *s,
1901 AVFormatParameters *ap)
1903 uint8_t recvbuf[1500];
1904 char host[500], sdp[500];
1906 URLContext* in = NULL;
1908 AVCodecContext codec;
1909 struct sockaddr_storage addr;
1911 socklen_t addrlen = sizeof(addr);
1913 if (!ff_network_init())
1914 return AVERROR(EIO);
1916 ret = ffurl_open(&in, s->filename, AVIO_FLAG_READ);
1921 ret = ffurl_read(in, recvbuf, sizeof(recvbuf));
1922 if (ret == AVERROR(EAGAIN))
1927 av_log(s, AV_LOG_WARNING, "Received too short packet\n");
1931 if ((recvbuf[0] & 0xc0) != 0x80) {
1932 av_log(s, AV_LOG_WARNING, "Unsupported RTP version packet "
1937 payload_type = recvbuf[1] & 0x7f;
1940 getsockname(ffurl_get_file_handle(in), (struct sockaddr*) &addr, &addrlen);
1944 memset(&codec, 0, sizeof(codec));
1945 if (ff_rtp_get_codec_info(&codec, payload_type)) {
1946 av_log(s, AV_LOG_ERROR, "Unable to receive RTP payload type %d "
1947 "without an SDP file describing it\n",
1951 if (codec.codec_type != AVMEDIA_TYPE_DATA) {
1952 av_log(s, AV_LOG_WARNING, "Guessing on RTP content - if not received "
1953 "properly you need an SDP file "
1957 av_url_split(NULL, 0, NULL, 0, host, sizeof(host), &port,
1958 NULL, 0, s->filename);
1960 snprintf(sdp, sizeof(sdp),
1961 "v=0\r\nc=IN IP%d %s\r\nm=%s %d RTP/AVP %d\r\n",
1962 addr.ss_family == AF_INET ? 4 : 6, host,
1963 codec.codec_type == AVMEDIA_TYPE_DATA ? "application" :
1964 codec.codec_type == AVMEDIA_TYPE_VIDEO ? "video" : "audio",
1965 port, payload_type);
1966 av_log(s, AV_LOG_VERBOSE, "SDP:\n%s\n", sdp);
1968 ffio_init_context(&pb, sdp, strlen(sdp), 0, NULL, NULL, NULL, NULL);
1971 /* sdp_read_header initializes this again */
1974 ret = sdp_read_header(s, ap);
1985 static const AVClass rtp_demuxer_class = {
1986 .class_name = "RTP demuxer",
1987 .item_name = av_default_item_name,
1988 .option = rtp_options,
1989 .version = LIBAVUTIL_VERSION_INT,
1992 AVInputFormat ff_rtp_demuxer = {
1994 .long_name = NULL_IF_CONFIG_SMALL("RTP input format"),
1995 .priv_data_size = sizeof(RTSPState),
1996 .read_probe = rtp_probe,
1997 .read_header = rtp_read_header,
1998 .read_packet = ff_rtsp_fetch_packet,
1999 .read_close = sdp_read_close,
2000 .flags = AVFMT_NOFILE,
2001 .priv_class = &rtp_demuxer_class
2003 #endif /* CONFIG_RTP_DEMUXER */