3 * Copyright (c) 2002 Fabrice Bellard
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 #include "libavutil/base64.h"
23 #include "libavutil/avstring.h"
24 #include "libavutil/intreadwrite.h"
25 #include "libavutil/random_seed.h"
30 #include <sys/select.h>
35 #include "os_support.h"
41 #include "rtpdec_asf.h"
44 //#define DEBUG_RTP_TCP
46 #if LIBAVFORMAT_VERSION_INT < (53 << 16)
47 int rtsp_default_protocols = (1 << RTSP_LOWER_TRANSPORT_UDP);
50 /* Timeout values for socket select, in ms,
51 * and read_packet(), in seconds */
52 #define SELECT_TIMEOUT_MS 100
53 #define READ_PACKET_TIMEOUT_S 10
54 #define MAX_TIMEOUTS READ_PACKET_TIMEOUT_S * 1000 / SELECT_TIMEOUT_MS
56 #define SPACE_CHARS " \t\r\n"
57 /* we use memchr() instead of strchr() here because strchr() will return
58 * the terminating '\0' of SPACE_CHARS instead of NULL if c is '\0'. */
59 #define redir_isspace(c) memchr(SPACE_CHARS, c, 4)
60 static void skip_spaces(const char **pp)
64 while (redir_isspace(*p))
69 static void get_word_until_chars(char *buf, int buf_size,
70 const char *sep, const char **pp)
78 while (!strchr(sep, *p) && *p != '\0') {
79 if ((q - buf) < buf_size - 1)
88 static void get_word_sep(char *buf, int buf_size, const char *sep,
91 if (**pp == '/') (*pp)++;
92 get_word_until_chars(buf, buf_size, sep, pp);
95 static void get_word(char *buf, int buf_size, const char **pp)
97 get_word_until_chars(buf, buf_size, SPACE_CHARS, pp);
100 /* parse the rtpmap description: <codec_name>/<clock_rate>[/<other params>] */
101 static int sdp_parse_rtpmap(AVFormatContext *s,
102 AVCodecContext *codec, RTSPStream *rtsp_st,
103 int payload_type, const char *p)
110 /* Loop into AVRtpDynamicPayloadTypes[] and AVRtpPayloadTypes[] and
111 * see if we can handle this kind of payload.
112 * The space should normally not be there but some Real streams or
113 * particular servers ("RealServer Version 6.1.3.970", see issue 1658)
114 * have a trailing space. */
115 get_word_sep(buf, sizeof(buf), "/ ", &p);
116 if (payload_type >= RTP_PT_PRIVATE) {
117 RTPDynamicProtocolHandler *handler;
118 for (handler = RTPFirstDynamicPayloadHandler;
119 handler; handler = handler->next) {
120 if (!strcasecmp(buf, handler->enc_name) &&
121 codec->codec_type == handler->codec_type) {
122 codec->codec_id = handler->codec_id;
123 rtsp_st->dynamic_handler = handler;
125 rtsp_st->dynamic_protocol_context = handler->open();
130 /* We are in a standard case
131 * (from http://www.iana.org/assignments/rtp-parameters). */
132 /* search into AVRtpPayloadTypes[] */
133 codec->codec_id = ff_rtp_codec_id(buf, codec->codec_type);
136 c = avcodec_find_decoder(codec->codec_id);
142 get_word_sep(buf, sizeof(buf), "/", &p);
144 switch (codec->codec_type) {
145 case AVMEDIA_TYPE_AUDIO:
146 av_log(s, AV_LOG_DEBUG, "audio codec set to: %s\n", c_name);
147 codec->sample_rate = RTSP_DEFAULT_AUDIO_SAMPLERATE;
148 codec->channels = RTSP_DEFAULT_NB_AUDIO_CHANNELS;
150 codec->sample_rate = i;
151 get_word_sep(buf, sizeof(buf), "/", &p);
155 // TODO: there is a bug here; if it is a mono stream, and
156 // less than 22000Hz, faad upconverts to stereo and twice
157 // the frequency. No problem, but the sample rate is being
158 // set here by the sdp line. Patch on its way. (rdm)
160 av_log(s, AV_LOG_DEBUG, "audio samplerate set to: %i\n",
162 av_log(s, AV_LOG_DEBUG, "audio channels set to: %i\n",
165 case AVMEDIA_TYPE_VIDEO:
166 av_log(s, AV_LOG_DEBUG, "video codec set to: %s\n", c_name);
174 /* return the length and optionally the data */
175 static int hex_to_data(uint8_t *data, const char *p)
185 c = toupper((unsigned char) *p++);
186 if (c >= '0' && c <= '9')
188 else if (c >= 'A' && c <= 'F')
203 static void sdp_parse_fmtp_config(AVCodecContext * codec, void *ctx,
204 char *attr, char *value)
206 switch (codec->codec_id) {
209 if (!strcmp(attr, "config")) {
210 /* decode the hexa encoded parameter */
211 int len = hex_to_data(NULL, value);
212 if (codec->extradata)
213 av_free(codec->extradata);
214 codec->extradata = av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE);
215 if (!codec->extradata)
217 codec->extradata_size = len;
218 hex_to_data(codec->extradata, value);
233 /* All known fmtp parameters and the corresponding RTPAttrTypeEnum */
234 #define ATTR_NAME_TYPE_INT 0
235 #define ATTR_NAME_TYPE_STR 1
236 static const AttrNameMap attr_names[]=
238 { "SizeLength", ATTR_NAME_TYPE_INT,
239 offsetof(RTPPayloadData, sizelength) },
240 { "IndexLength", ATTR_NAME_TYPE_INT,
241 offsetof(RTPPayloadData, indexlength) },
242 { "IndexDeltaLength", ATTR_NAME_TYPE_INT,
243 offsetof(RTPPayloadData, indexdeltalength) },
244 { "profile-level-id", ATTR_NAME_TYPE_INT,
245 offsetof(RTPPayloadData, profile_level_id) },
246 { "StreamType", ATTR_NAME_TYPE_INT,
247 offsetof(RTPPayloadData, streamtype) },
248 { "mode", ATTR_NAME_TYPE_STR,
249 offsetof(RTPPayloadData, mode) },
253 /* parse the attribute line from the fmtp a line of an sdp response. This
254 * is broken out as a function because it is used in rtp_h264.c, which is
256 int ff_rtsp_next_attr_and_value(const char **p, char *attr, int attr_size,
257 char *value, int value_size)
261 get_word_sep(attr, attr_size, "=", p);
264 get_word_sep(value, value_size, ";", p);
272 /* parse a SDP line and save stream attributes */
273 static void sdp_parse_fmtp(AVStream *st, const char *p)
278 RTSPStream *rtsp_st = st->priv_data;
279 AVCodecContext *codec = st->codec;
280 RTPPayloadData *rtp_payload_data = &rtsp_st->rtp_payload_data;
282 /* loop on each attribute */
283 while (ff_rtsp_next_attr_and_value(&p, attr, sizeof(attr),
284 value, sizeof(value))) {
285 /* grab the codec extra_data from the config parameter of the fmtp
287 sdp_parse_fmtp_config(codec, rtsp_st->dynamic_protocol_context,
289 /* Looking for a known attribute */
290 for (i = 0; attr_names[i].str; ++i) {
291 if (!strcasecmp(attr, attr_names[i].str)) {
292 if (attr_names[i].type == ATTR_NAME_TYPE_INT) {
293 *(int *)((char *)rtp_payload_data +
294 attr_names[i].offset) = atoi(value);
295 } else if (attr_names[i].type == ATTR_NAME_TYPE_STR)
296 *(char **)((char *)rtp_payload_data +
297 attr_names[i].offset) = av_strdup(value);
303 /** Parse a string p in the form of Range:npt=xx-xx, and determine the start
305 * Used for seeking in the rtp stream.
307 static void rtsp_parse_range_npt(const char *p, int64_t *start, int64_t *end)
312 if (!av_stristart(p, "npt=", &p))
315 *start = AV_NOPTS_VALUE;
316 *end = AV_NOPTS_VALUE;
318 get_word_sep(buf, sizeof(buf), "-", &p);
319 *start = parse_date(buf, 1);
322 get_word_sep(buf, sizeof(buf), "-", &p);
323 *end = parse_date(buf, 1);
325 // av_log(NULL, AV_LOG_DEBUG, "Range Start: %lld\n", *start);
326 // av_log(NULL, AV_LOG_DEBUG, "Range End: %lld\n", *end);
329 typedef struct SDPParseState {
331 struct in_addr default_ip;
333 int skip_media; ///< set if an unknown m= line occurs
336 static void sdp_parse_line(AVFormatContext *s, SDPParseState *s1,
337 int letter, const char *buf)
339 RTSPState *rt = s->priv_data;
340 char buf1[64], st_type[64];
342 enum AVMediaType codec_type;
346 struct in_addr sdp_ip;
349 dprintf(s, "sdp: %c='%s'\n", letter, buf);
352 if (s1->skip_media && letter != 'm')
356 get_word(buf1, sizeof(buf1), &p);
357 if (strcmp(buf1, "IN") != 0)
359 get_word(buf1, sizeof(buf1), &p);
360 if (strcmp(buf1, "IP4") != 0)
362 get_word_sep(buf1, sizeof(buf1), "/", &p);
363 if (ff_inet_aton(buf1, &sdp_ip) == 0)
368 get_word_sep(buf1, sizeof(buf1), "/", &p);
371 if (s->nb_streams == 0) {
372 s1->default_ip = sdp_ip;
373 s1->default_ttl = ttl;
375 st = s->streams[s->nb_streams - 1];
376 rtsp_st = st->priv_data;
377 rtsp_st->sdp_ip = sdp_ip;
378 rtsp_st->sdp_ttl = ttl;
382 av_metadata_set2(&s->metadata, "title", p, 0);
385 if (s->nb_streams == 0) {
386 av_metadata_set2(&s->metadata, "comment", p, 0);
393 get_word(st_type, sizeof(st_type), &p);
394 if (!strcmp(st_type, "audio")) {
395 codec_type = AVMEDIA_TYPE_AUDIO;
396 } else if (!strcmp(st_type, "video")) {
397 codec_type = AVMEDIA_TYPE_VIDEO;
398 } else if (!strcmp(st_type, "application")) {
399 codec_type = AVMEDIA_TYPE_DATA;
404 rtsp_st = av_mallocz(sizeof(RTSPStream));
407 rtsp_st->stream_index = -1;
408 dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st);
410 rtsp_st->sdp_ip = s1->default_ip;
411 rtsp_st->sdp_ttl = s1->default_ttl;
413 get_word(buf1, sizeof(buf1), &p); /* port */
414 rtsp_st->sdp_port = atoi(buf1);
416 get_word(buf1, sizeof(buf1), &p); /* protocol (ignored) */
418 /* XXX: handle list of formats */
419 get_word(buf1, sizeof(buf1), &p); /* format list */
420 rtsp_st->sdp_payload_type = atoi(buf1);
422 if (!strcmp(ff_rtp_enc_name(rtsp_st->sdp_payload_type), "MP2T")) {
423 /* no corresponding stream */
425 st = av_new_stream(s, 0);
428 st->priv_data = rtsp_st;
429 rtsp_st->stream_index = st->index;
430 st->codec->codec_type = codec_type;
431 if (rtsp_st->sdp_payload_type < RTP_PT_PRIVATE) {
432 /* if standard payload type, we can find the codec right now */
433 ff_rtp_get_codec_info(st->codec, rtsp_st->sdp_payload_type);
436 /* put a default control url */
437 av_strlcpy(rtsp_st->control_url, rt->control_uri,
438 sizeof(rtsp_st->control_url));
441 if (av_strstart(p, "control:", &p)) {
442 if (s->nb_streams == 0) {
443 if (!strncmp(p, "rtsp://", 7))
444 av_strlcpy(rt->control_uri, p,
445 sizeof(rt->control_uri));
448 /* get the control url */
449 st = s->streams[s->nb_streams - 1];
450 rtsp_st = st->priv_data;
452 /* XXX: may need to add full url resolution */
453 ff_url_split(proto, sizeof(proto), NULL, 0, NULL, 0,
455 if (proto[0] == '\0') {
456 /* relative control URL */
457 if (rtsp_st->control_url[strlen(rtsp_st->control_url)-1]!='/')
458 av_strlcat(rtsp_st->control_url, "/",
459 sizeof(rtsp_st->control_url));
460 av_strlcat(rtsp_st->control_url, p,
461 sizeof(rtsp_st->control_url));
463 av_strlcpy(rtsp_st->control_url, p,
464 sizeof(rtsp_st->control_url));
466 } else if (av_strstart(p, "rtpmap:", &p) && s->nb_streams > 0) {
467 /* NOTE: rtpmap is only supported AFTER the 'm=' tag */
468 get_word(buf1, sizeof(buf1), &p);
469 payload_type = atoi(buf1);
470 st = s->streams[s->nb_streams - 1];
471 rtsp_st = st->priv_data;
472 sdp_parse_rtpmap(s, st->codec, rtsp_st, payload_type, p);
473 } else if (av_strstart(p, "fmtp:", &p)) {
474 /* NOTE: fmtp is only supported AFTER the 'a=rtpmap:xxx' tag */
475 get_word(buf1, sizeof(buf1), &p);
476 payload_type = atoi(buf1);
477 for (i = 0; i < s->nb_streams; i++) {
479 rtsp_st = st->priv_data;
480 if (rtsp_st->sdp_payload_type == payload_type) {
481 if (!(rtsp_st->dynamic_handler &&
482 rtsp_st->dynamic_handler->parse_sdp_a_line &&
483 rtsp_st->dynamic_handler->parse_sdp_a_line(s,
484 i, rtsp_st->dynamic_protocol_context, buf)))
485 sdp_parse_fmtp(st, p);
488 } else if (av_strstart(p, "framesize:", &p)) {
489 // let dynamic protocol handlers have a stab at the line.
490 get_word(buf1, sizeof(buf1), &p);
491 payload_type = atoi(buf1);
492 for (i = 0; i < s->nb_streams; i++) {
494 rtsp_st = st->priv_data;
495 if (rtsp_st->sdp_payload_type == payload_type &&
496 rtsp_st->dynamic_handler &&
497 rtsp_st->dynamic_handler->parse_sdp_a_line)
498 rtsp_st->dynamic_handler->parse_sdp_a_line(s, i,
499 rtsp_st->dynamic_protocol_context, buf);
501 } else if (av_strstart(p, "range:", &p)) {
504 // this is so that seeking on a streamed file can work.
505 rtsp_parse_range_npt(p, &start, &end);
506 s->start_time = start;
507 /* AV_NOPTS_VALUE means live broadcast (and can't seek) */
508 s->duration = (end == AV_NOPTS_VALUE) ?
509 AV_NOPTS_VALUE : end - start;
510 } else if (av_strstart(p, "IsRealDataType:integer;",&p)) {
512 rt->transport = RTSP_TRANSPORT_RDT;
514 if (rt->server_type == RTSP_SERVER_WMS)
515 ff_wms_parse_sdp_a_line(s, p);
516 if (s->nb_streams > 0) {
517 if (rt->server_type == RTSP_SERVER_REAL)
518 ff_real_parse_sdp_a_line(s, s->nb_streams - 1, p);
520 rtsp_st = s->streams[s->nb_streams - 1]->priv_data;
521 if (rtsp_st->dynamic_handler &&
522 rtsp_st->dynamic_handler->parse_sdp_a_line)
523 rtsp_st->dynamic_handler->parse_sdp_a_line(s,
525 rtsp_st->dynamic_protocol_context, buf);
532 static int sdp_parse(AVFormatContext *s, const char *content)
536 /* Some SDP lines, particularly for Realmedia or ASF RTSP streams,
537 * contain long SDP lines containing complete ASF Headers (several
538 * kB) or arrays of MDPR (RM stream descriptor) headers plus
539 * "rulebooks" describing their properties. Therefore, the SDP line
542 * The Vorbis FMTP line can be up to 16KB - see xiph_parse_sdp_line
543 * in rtpdec_xiph.c. */
545 SDPParseState sdp_parse_state, *s1 = &sdp_parse_state;
547 memset(s1, 0, sizeof(SDPParseState));
558 /* get the content */
560 while (*p != '\n' && *p != '\r' && *p != '\0') {
561 if ((q - buf) < sizeof(buf) - 1)
566 sdp_parse_line(s, s1, letter, buf);
568 while (*p != '\n' && *p != '\0')
576 /* close and free RTSP streams */
577 void ff_rtsp_close_streams(AVFormatContext *s)
579 RTSPState *rt = s->priv_data;
583 for (i = 0; i < rt->nb_rtsp_streams; i++) {
584 rtsp_st = rt->rtsp_streams[i];
586 if (rtsp_st->transport_priv) {
588 AVFormatContext *rtpctx = rtsp_st->transport_priv;
589 av_write_trailer(rtpctx);
590 if (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
592 url_close_dyn_buf(rtpctx->pb, &ptr);
595 url_fclose(rtpctx->pb);
597 av_metadata_free(&rtpctx->streams[0]->metadata);
598 av_metadata_free(&rtpctx->metadata);
599 av_free(rtpctx->streams[0]);
601 } else if (rt->transport == RTSP_TRANSPORT_RDT)
602 ff_rdt_parse_close(rtsp_st->transport_priv);
604 rtp_parse_close(rtsp_st->transport_priv);
606 if (rtsp_st->rtp_handle)
607 url_close(rtsp_st->rtp_handle);
608 if (rtsp_st->dynamic_handler && rtsp_st->dynamic_protocol_context)
609 rtsp_st->dynamic_handler->close(
610 rtsp_st->dynamic_protocol_context);
613 av_free(rt->rtsp_streams);
615 av_close_input_stream (rt->asf_ctx);
620 static void *rtsp_rtp_mux_open(AVFormatContext *s, AVStream *st,
623 RTSPState *rt = s->priv_data;
624 AVFormatContext *rtpctx;
626 AVOutputFormat *rtp_format = av_guess_format("rtp", NULL, NULL);
631 /* Allocate an AVFormatContext for each output stream */
632 rtpctx = avformat_alloc_context();
636 rtpctx->oformat = rtp_format;
637 if (!av_new_stream(rtpctx, 0)) {
641 /* Copy the max delay setting; the rtp muxer reads this. */
642 rtpctx->max_delay = s->max_delay;
643 /* Copy other stream parameters. */
644 rtpctx->streams[0]->sample_aspect_ratio = st->sample_aspect_ratio;
646 /* Set the synchronized start time. */
647 rtpctx->start_time_realtime = rt->start_time;
649 /* Remove the local codec, link to the original codec
650 * context instead, to give the rtp muxer access to
651 * codec parameters. */
652 av_free(rtpctx->streams[0]->codec);
653 rtpctx->streams[0]->codec = st->codec;
656 url_fdopen(&rtpctx->pb, handle);
658 url_open_dyn_packet_buf(&rtpctx->pb, RTSP_TCP_MAX_PACKET_SIZE);
659 ret = av_write_header(rtpctx);
663 url_fclose(rtpctx->pb);
666 url_close_dyn_buf(rtpctx->pb, &ptr);
669 av_free(rtpctx->streams[0]);
674 /* Copy the RTP AVStream timebase back to the original AVStream */
675 st->time_base = rtpctx->streams[0]->time_base;
679 static int rtsp_open_transport_ctx(AVFormatContext *s, RTSPStream *rtsp_st)
681 RTSPState *rt = s->priv_data;
684 /* open the RTP context */
685 if (rtsp_st->stream_index >= 0)
686 st = s->streams[rtsp_st->stream_index];
688 s->ctx_flags |= AVFMTCTX_NOHEADER;
691 rtsp_st->transport_priv = rtsp_rtp_mux_open(s, st, rtsp_st->rtp_handle);
692 /* Ownership of rtp_handle is passed to the rtp mux context */
693 rtsp_st->rtp_handle = NULL;
694 } else if (rt->transport == RTSP_TRANSPORT_RDT)
695 rtsp_st->transport_priv = ff_rdt_parse_open(s, st->index,
696 rtsp_st->dynamic_protocol_context,
697 rtsp_st->dynamic_handler);
699 rtsp_st->transport_priv = rtp_parse_open(s, st, rtsp_st->rtp_handle,
700 rtsp_st->sdp_payload_type,
701 &rtsp_st->rtp_payload_data);
703 if (!rtsp_st->transport_priv) {
704 return AVERROR(ENOMEM);
705 } else if (rt->transport != RTSP_TRANSPORT_RDT) {
706 if (rtsp_st->dynamic_handler) {
707 rtp_parse_set_dynamic_protocol(rtsp_st->transport_priv,
708 rtsp_st->dynamic_protocol_context,
709 rtsp_st->dynamic_handler);
716 #if CONFIG_RTSP_DEMUXER || CONFIG_RTSP_MUXER
717 static int rtsp_probe(AVProbeData *p)
719 if (av_strstart(p->filename, "rtsp:", NULL))
720 return AVPROBE_SCORE_MAX;
724 static void rtsp_parse_range(int *min_ptr, int *max_ptr, const char **pp)
731 v = strtol(p, (char **)&p, 10);
735 v = strtol(p, (char **)&p, 10);
744 /* XXX: only one transport specification is parsed */
745 static void rtsp_parse_transport(RTSPMessageHeader *reply, const char *p)
747 char transport_protocol[16];
749 char lower_transport[16];
751 RTSPTransportField *th;
754 reply->nb_transports = 0;
761 th = &reply->transports[reply->nb_transports];
763 get_word_sep(transport_protocol, sizeof(transport_protocol),
765 if (!strcasecmp (transport_protocol, "rtp")) {
766 get_word_sep(profile, sizeof(profile), "/;,", &p);
767 lower_transport[0] = '\0';
768 /* rtp/avp/<protocol> */
770 get_word_sep(lower_transport, sizeof(lower_transport),
773 th->transport = RTSP_TRANSPORT_RTP;
774 } else if (!strcasecmp (transport_protocol, "x-pn-tng") ||
775 !strcasecmp (transport_protocol, "x-real-rdt")) {
776 /* x-pn-tng/<protocol> */
777 get_word_sep(lower_transport, sizeof(lower_transport), "/;,", &p);
779 th->transport = RTSP_TRANSPORT_RDT;
781 if (!strcasecmp(lower_transport, "TCP"))
782 th->lower_transport = RTSP_LOWER_TRANSPORT_TCP;
784 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP;
788 /* get each parameter */
789 while (*p != '\0' && *p != ',') {
790 get_word_sep(parameter, sizeof(parameter), "=;,", &p);
791 if (!strcmp(parameter, "port")) {
794 rtsp_parse_range(&th->port_min, &th->port_max, &p);
796 } else if (!strcmp(parameter, "client_port")) {
799 rtsp_parse_range(&th->client_port_min,
800 &th->client_port_max, &p);
802 } else if (!strcmp(parameter, "server_port")) {
805 rtsp_parse_range(&th->server_port_min,
806 &th->server_port_max, &p);
808 } else if (!strcmp(parameter, "interleaved")) {
811 rtsp_parse_range(&th->interleaved_min,
812 &th->interleaved_max, &p);
814 } else if (!strcmp(parameter, "multicast")) {
815 if (th->lower_transport == RTSP_LOWER_TRANSPORT_UDP)
816 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP_MULTICAST;
817 } else if (!strcmp(parameter, "ttl")) {
820 th->ttl = strtol(p, (char **)&p, 10);
822 } else if (!strcmp(parameter, "destination")) {
823 struct in_addr ipaddr;
827 get_word_sep(buf, sizeof(buf), ";,", &p);
828 if (ff_inet_aton(buf, &ipaddr))
829 th->destination = ntohl(ipaddr.s_addr);
832 while (*p != ';' && *p != '\0' && *p != ',')
840 reply->nb_transports++;
844 void ff_rtsp_parse_line(RTSPMessageHeader *reply, const char *buf,
845 HTTPAuthState *auth_state)
849 /* NOTE: we do case independent match for broken servers */
851 if (av_stristart(p, "Session:", &p)) {
853 get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p);
854 if (av_stristart(p, ";timeout=", &p) &&
855 (t = strtol(p, NULL, 10)) > 0) {
858 } else if (av_stristart(p, "Content-Length:", &p)) {
859 reply->content_length = strtol(p, NULL, 10);
860 } else if (av_stristart(p, "Transport:", &p)) {
861 rtsp_parse_transport(reply, p);
862 } else if (av_stristart(p, "CSeq:", &p)) {
863 reply->seq = strtol(p, NULL, 10);
864 } else if (av_stristart(p, "Range:", &p)) {
865 rtsp_parse_range_npt(p, &reply->range_start, &reply->range_end);
866 } else if (av_stristart(p, "RealChallenge1:", &p)) {
868 av_strlcpy(reply->real_challenge, p, sizeof(reply->real_challenge));
869 } else if (av_stristart(p, "Server:", &p)) {
871 av_strlcpy(reply->server, p, sizeof(reply->server));
872 } else if (av_stristart(p, "Notice:", &p) ||
873 av_stristart(p, "X-Notice:", &p)) {
874 reply->notice = strtol(p, NULL, 10);
875 } else if (av_stristart(p, "Location:", &p)) {
877 av_strlcpy(reply->location, p , sizeof(reply->location));
878 } else if (av_stristart(p, "WWW-Authenticate:", &p) && auth_state) {
880 ff_http_auth_handle_header(auth_state, "WWW-Authenticate", p);
881 } else if (av_stristart(p, "Authentication-Info:", &p) && auth_state) {
883 ff_http_auth_handle_header(auth_state, "Authentication-Info", p);
887 /* skip a RTP/TCP interleaved packet */
888 void ff_rtsp_skip_packet(AVFormatContext *s)
890 RTSPState *rt = s->priv_data;
894 ret = url_read_complete(rt->rtsp_hd, buf, 3);
897 len = AV_RB16(buf + 1);
899 dprintf(s, "skipping RTP packet len=%d\n", len);
904 if (len1 > sizeof(buf))
906 ret = url_read_complete(rt->rtsp_hd, buf, len1);
913 int ff_rtsp_read_reply(AVFormatContext *s, RTSPMessageHeader *reply,
914 unsigned char **content_ptr,
915 int return_on_interleaved_data)
917 RTSPState *rt = s->priv_data;
918 char buf[4096], buf1[1024], *q;
921 int ret, content_length, line_count = 0;
922 unsigned char *content = NULL;
924 memset(reply, 0, sizeof(*reply));
926 /* parse reply (XXX: use buffers) */
927 rt->last_reply[0] = '\0';
931 ret = url_read_complete(rt->rtsp_hd, &ch, 1);
933 dprintf(s, "ret=%d c=%02x [%c]\n", ret, ch, ch);
940 /* XXX: only parse it if first char on line ? */
941 if (return_on_interleaved_data) {
944 ff_rtsp_skip_packet(s);
945 } else if (ch != '\r') {
946 if ((q - buf) < sizeof(buf) - 1)
952 dprintf(s, "line='%s'\n", buf);
954 /* test if last line */
958 if (line_count == 0) {
960 get_word(buf1, sizeof(buf1), &p);
961 get_word(buf1, sizeof(buf1), &p);
962 reply->status_code = atoi(buf1);
964 ff_rtsp_parse_line(reply, p, &rt->auth_state);
965 av_strlcat(rt->last_reply, p, sizeof(rt->last_reply));
966 av_strlcat(rt->last_reply, "\n", sizeof(rt->last_reply));
971 if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0')
972 av_strlcpy(rt->session_id, reply->session_id, sizeof(rt->session_id));
974 content_length = reply->content_length;
975 if (content_length > 0) {
976 /* leave some room for a trailing '\0' (useful for simple parsing) */
977 content = av_malloc(content_length + 1);
978 (void)url_read_complete(rt->rtsp_hd, content, content_length);
979 content[content_length] = '\0';
982 *content_ptr = content;
986 if (rt->seq != reply->seq) {
987 av_log(s, AV_LOG_WARNING, "CSeq %d expected, %d received.\n",
988 rt->seq, reply->seq);
992 if (reply->notice == 2101 /* End-of-Stream Reached */ ||
993 reply->notice == 2104 /* Start-of-Stream Reached */ ||
994 reply->notice == 2306 /* Continuous Feed Terminated */) {
995 rt->state = RTSP_STATE_IDLE;
996 } else if (reply->notice >= 4400 && reply->notice < 5500) {
997 return AVERROR(EIO); /* data or server error */
998 } else if (reply->notice == 2401 /* Ticket Expired */ ||
999 (reply->notice >= 5500 && reply->notice < 5600) /* end of term */ )
1000 return AVERROR(EPERM);
1005 int ff_rtsp_send_cmd_with_content_async(AVFormatContext *s,
1006 const char *method, const char *url,
1007 const char *headers,
1008 const unsigned char *send_content,
1009 int send_content_length)
1011 RTSPState *rt = s->priv_data;
1012 char buf[4096], *out_buf;
1013 char base64buf[AV_BASE64_SIZE(sizeof(buf))];
1015 /* Add in RTSP headers */
1018 snprintf(buf, sizeof(buf), "%s %s RTSP/1.0\r\n", method, url);
1020 av_strlcat(buf, headers, sizeof(buf));
1021 av_strlcatf(buf, sizeof(buf), "CSeq: %d\r\n", rt->seq);
1022 if (rt->session_id[0] != '\0' && (!headers ||
1023 !strstr(headers, "\nIf-Match:"))) {
1024 av_strlcatf(buf, sizeof(buf), "Session: %s\r\n", rt->session_id);
1027 char *str = ff_http_auth_create_response(&rt->auth_state,
1028 rt->auth, url, method);
1030 av_strlcat(buf, str, sizeof(buf));
1033 if (send_content_length > 0 && send_content)
1034 av_strlcatf(buf, sizeof(buf), "Content-Length: %d\r\n", send_content_length);
1035 av_strlcat(buf, "\r\n", sizeof(buf));
1037 /* base64 encode rtsp if tunneling */
1038 if (rt->control_transport == RTSP_MODE_TUNNEL) {
1039 av_base64_encode(base64buf, sizeof(base64buf), buf, strlen(buf));
1040 out_buf = base64buf;
1043 dprintf(s, "Sending:\n%s--\n", buf);
1045 url_write(rt->rtsp_hd_out, out_buf, strlen(out_buf));
1046 if (send_content_length > 0 && send_content) {
1047 if (rt->control_transport == RTSP_MODE_TUNNEL) {
1048 av_log(s, AV_LOG_ERROR, "tunneling of RTSP requests "
1049 "with content data not supported\n");
1050 return AVERROR_PATCHWELCOME;
1052 url_write(rt->rtsp_hd_out, send_content, send_content_length);
1054 rt->last_cmd_time = av_gettime();
1059 int ff_rtsp_send_cmd_async(AVFormatContext *s, const char *method,
1060 const char *url, const char *headers)
1062 return ff_rtsp_send_cmd_with_content_async(s, method, url, headers, NULL, 0);
1065 int ff_rtsp_send_cmd(AVFormatContext *s, const char *method, const char *url,
1066 const char *headers, RTSPMessageHeader *reply,
1067 unsigned char **content_ptr)
1069 return ff_rtsp_send_cmd_with_content(s, method, url, headers, reply,
1070 content_ptr, NULL, 0);
1073 int ff_rtsp_send_cmd_with_content(AVFormatContext *s,
1074 const char *method, const char *url,
1076 RTSPMessageHeader *reply,
1077 unsigned char **content_ptr,
1078 const unsigned char *send_content,
1079 int send_content_length)
1081 RTSPState *rt = s->priv_data;
1082 HTTPAuthType cur_auth_type;
1086 cur_auth_type = rt->auth_state.auth_type;
1087 if ((ret = ff_rtsp_send_cmd_with_content_async(s, method, url, header,
1089 send_content_length)))
1092 if ((ret = ff_rtsp_read_reply(s, reply, content_ptr, 0) ) < 0)
1095 if (reply->status_code == 401 && cur_auth_type == HTTP_AUTH_NONE &&
1096 rt->auth_state.auth_type != HTTP_AUTH_NONE)
1103 * @return 0 on success, <0 on error, 1 if protocol is unavailable.
1105 static int make_setup_request(AVFormatContext *s, const char *host, int port,
1106 int lower_transport, const char *real_challenge)
1108 RTSPState *rt = s->priv_data;
1109 int rtx, j, i, err, interleave = 0;
1110 RTSPStream *rtsp_st;
1111 RTSPMessageHeader reply1, *reply = &reply1;
1113 const char *trans_pref;
1115 if (rt->transport == RTSP_TRANSPORT_RDT)
1116 trans_pref = "x-pn-tng";
1118 trans_pref = "RTP/AVP";
1120 /* default timeout: 1 minute */
1123 /* for each stream, make the setup request */
1124 /* XXX: we assume the same server is used for the control of each
1127 for (j = RTSP_RTP_PORT_MIN, i = 0; i < rt->nb_rtsp_streams; ++i) {
1128 char transport[2048];
1131 * WMS serves all UDP data over a single connection, the RTX, which
1132 * isn't necessarily the first in the SDP but has to be the first
1133 * to be set up, else the second/third SETUP will fail with a 461.
1135 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP &&
1136 rt->server_type == RTSP_SERVER_WMS) {
1139 for (rtx = 0; rtx < rt->nb_rtsp_streams; rtx++) {
1140 int len = strlen(rt->rtsp_streams[rtx]->control_url);
1142 !strcmp(rt->rtsp_streams[rtx]->control_url + len - 4,
1146 if (rtx == rt->nb_rtsp_streams)
1147 return -1; /* no RTX found */
1148 rtsp_st = rt->rtsp_streams[rtx];
1150 rtsp_st = rt->rtsp_streams[i > rtx ? i : i - 1];
1152 rtsp_st = rt->rtsp_streams[i];
1155 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP) {
1158 if (rt->server_type == RTSP_SERVER_WMS && i > 1) {
1159 port = reply->transports[0].client_port_min;
1163 /* first try in specified port range */
1164 if (RTSP_RTP_PORT_MIN != 0) {
1165 while (j <= RTSP_RTP_PORT_MAX) {
1166 ff_url_join(buf, sizeof(buf), "rtp", NULL, host, -1,
1167 "?localport=%d", j);
1168 /* we will use two ports per rtp stream (rtp and rtcp) */
1170 if (url_open(&rtsp_st->rtp_handle, buf, URL_RDWR) == 0)
1176 /* then try on any port */
1177 if (url_open(&rtsp_st->rtp_handle, "rtp://", URL_RDONLY) < 0) {
1178 err = AVERROR_INVALIDDATA;
1184 port = rtp_get_local_port(rtsp_st->rtp_handle);
1186 snprintf(transport, sizeof(transport) - 1,
1187 "%s/UDP;", trans_pref);
1188 if (rt->server_type != RTSP_SERVER_REAL)
1189 av_strlcat(transport, "unicast;", sizeof(transport));
1190 av_strlcatf(transport, sizeof(transport),
1191 "client_port=%d", port);
1192 if (rt->transport == RTSP_TRANSPORT_RTP &&
1193 !(rt->server_type == RTSP_SERVER_WMS && i > 0))
1194 av_strlcatf(transport, sizeof(transport), "-%d", port + 1);
1198 else if (lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
1199 /** For WMS streams, the application streams are only used for
1200 * UDP. When trying to set it up for TCP streams, the server
1201 * will return an error. Therefore, we skip those streams. */
1202 if (rt->server_type == RTSP_SERVER_WMS &&
1203 s->streams[rtsp_st->stream_index]->codec->codec_type ==
1206 snprintf(transport, sizeof(transport) - 1,
1207 "%s/TCP;", trans_pref);
1208 if (rt->server_type == RTSP_SERVER_WMS)
1209 av_strlcat(transport, "unicast;", sizeof(transport));
1210 av_strlcatf(transport, sizeof(transport),
1211 "interleaved=%d-%d",
1212 interleave, interleave + 1);
1216 else if (lower_transport == RTSP_LOWER_TRANSPORT_UDP_MULTICAST) {
1217 snprintf(transport, sizeof(transport) - 1,
1218 "%s/UDP;multicast", trans_pref);
1221 av_strlcat(transport, ";mode=receive", sizeof(transport));
1222 } else if (rt->server_type == RTSP_SERVER_REAL ||
1223 rt->server_type == RTSP_SERVER_WMS)
1224 av_strlcat(transport, ";mode=play", sizeof(transport));
1225 snprintf(cmd, sizeof(cmd),
1226 "Transport: %s\r\n",
1228 if (i == 0 && rt->server_type == RTSP_SERVER_REAL) {
1229 char real_res[41], real_csum[9];
1230 ff_rdt_calc_response_and_checksum(real_res, real_csum,
1232 av_strlcatf(cmd, sizeof(cmd),
1234 "RealChallenge2: %s, sd=%s\r\n",
1235 rt->session_id, real_res, real_csum);
1237 ff_rtsp_send_cmd(s, "SETUP", rtsp_st->control_url, cmd, reply, NULL);
1238 if (reply->status_code == 461 /* Unsupported protocol */ && i == 0) {
1241 } else if (reply->status_code != RTSP_STATUS_OK ||
1242 reply->nb_transports != 1) {
1243 err = AVERROR_INVALIDDATA;
1247 /* XXX: same protocol for all streams is required */
1249 if (reply->transports[0].lower_transport != rt->lower_transport ||
1250 reply->transports[0].transport != rt->transport) {
1251 err = AVERROR_INVALIDDATA;
1255 rt->lower_transport = reply->transports[0].lower_transport;
1256 rt->transport = reply->transports[0].transport;
1259 /* close RTP connection if not choosen */
1260 if (reply->transports[0].lower_transport != RTSP_LOWER_TRANSPORT_UDP &&
1261 (lower_transport == RTSP_LOWER_TRANSPORT_UDP)) {
1262 url_close(rtsp_st->rtp_handle);
1263 rtsp_st->rtp_handle = NULL;
1266 switch(reply->transports[0].lower_transport) {
1267 case RTSP_LOWER_TRANSPORT_TCP:
1268 rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
1269 rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
1272 case RTSP_LOWER_TRANSPORT_UDP: {
1275 /* XXX: also use address if specified */
1276 ff_url_join(url, sizeof(url), "rtp", NULL, host,
1277 reply->transports[0].server_port_min, NULL);
1278 if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) &&
1279 rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
1280 err = AVERROR_INVALIDDATA;
1283 /* Try to initialize the connection state in a
1284 * potential NAT router by sending dummy packets.
1285 * RTP/RTCP dummy packets are used for RDT, too.
1287 if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) && s->iformat)
1288 rtp_send_punch_packets(rtsp_st->rtp_handle);
1291 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST: {
1296 if (reply->transports[0].destination) {
1297 in.s_addr = htonl(reply->transports[0].destination);
1298 port = reply->transports[0].port_min;
1299 ttl = reply->transports[0].ttl;
1301 in = rtsp_st->sdp_ip;
1302 port = rtsp_st->sdp_port;
1303 ttl = rtsp_st->sdp_ttl;
1305 ff_url_join(url, sizeof(url), "rtp", NULL, inet_ntoa(in),
1306 port, "?ttl=%d", ttl);
1307 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1308 err = AVERROR_INVALIDDATA;
1315 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
1319 if (reply->timeout > 0)
1320 rt->timeout = reply->timeout;
1322 if (rt->server_type == RTSP_SERVER_REAL)
1323 rt->need_subscription = 1;
1328 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1329 if (rt->rtsp_streams[i]->rtp_handle) {
1330 url_close(rt->rtsp_streams[i]->rtp_handle);
1331 rt->rtsp_streams[i]->rtp_handle = NULL;
1337 static int rtsp_read_play(AVFormatContext *s)
1339 RTSPState *rt = s->priv_data;
1340 RTSPMessageHeader reply1, *reply = &reply1;
1344 av_log(s, AV_LOG_DEBUG, "hello state=%d\n", rt->state);
1346 if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) {
1347 if (rt->state == RTSP_STATE_PAUSED) {
1350 snprintf(cmd, sizeof(cmd),
1351 "Range: npt=%0.3f-\r\n",
1352 (double)rt->seek_timestamp / AV_TIME_BASE);
1354 ff_rtsp_send_cmd(s, "PLAY", rt->control_uri, cmd, reply, NULL);
1355 if (reply->status_code != RTSP_STATUS_OK) {
1358 if (reply->range_start != AV_NOPTS_VALUE &&
1359 rt->transport == RTSP_TRANSPORT_RTP) {
1360 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1361 RTSPStream *rtsp_st = rt->rtsp_streams[i];
1362 RTPDemuxContext *rtpctx = rtsp_st->transport_priv;
1363 AVStream *st = NULL;
1366 if (rtsp_st->stream_index >= 0)
1367 st = s->streams[rtsp_st->stream_index];
1368 rtpctx->last_rtcp_ntp_time = AV_NOPTS_VALUE;
1369 rtpctx->first_rtcp_ntp_time = AV_NOPTS_VALUE;
1371 rtpctx->range_start_offset = av_rescale_q(reply->range_start,
1377 rt->state = RTSP_STATE_STREAMING;
1381 static int rtsp_setup_input_streams(AVFormatContext *s, RTSPMessageHeader *reply)
1383 RTSPState *rt = s->priv_data;
1385 unsigned char *content = NULL;
1388 /* describe the stream */
1389 snprintf(cmd, sizeof(cmd),
1390 "Accept: application/sdp\r\n");
1391 if (rt->server_type == RTSP_SERVER_REAL) {
1393 * The Require: attribute is needed for proper streaming from
1394 * Realmedia servers.
1397 "Require: com.real.retain-entity-for-setup\r\n",
1400 ff_rtsp_send_cmd(s, "DESCRIBE", rt->control_uri, cmd, reply, &content);
1402 return AVERROR_INVALIDDATA;
1403 if (reply->status_code != RTSP_STATUS_OK) {
1405 return AVERROR_INVALIDDATA;
1408 /* now we got the SDP description, we parse it */
1409 ret = sdp_parse(s, (const char *)content);
1412 return AVERROR_INVALIDDATA;
1417 static int rtsp_setup_output_streams(AVFormatContext *s, const char *addr)
1419 RTSPState *rt = s->priv_data;
1420 RTSPMessageHeader reply1, *reply = &reply1;
1423 AVFormatContext sdp_ctx, *ctx_array[1];
1425 rt->start_time = av_gettime();
1427 /* Announce the stream */
1428 sdp = av_mallocz(8192);
1430 return AVERROR(ENOMEM);
1431 /* We create the SDP based on the RTSP AVFormatContext where we
1432 * aren't allowed to change the filename field. (We create the SDP
1433 * based on the RTSP context since the contexts for the RTP streams
1434 * don't exist yet.) In order to specify a custom URL with the actual
1435 * peer IP instead of the originally specified hostname, we create
1436 * a temporary copy of the AVFormatContext, where the custom URL is set.
1438 * FIXME: Create the SDP without copying the AVFormatContext.
1439 * This either requires setting up the RTP stream AVFormatContexts
1440 * already here (complicating things immensely) or getting a more
1441 * flexible SDP creation interface.
1444 ff_url_join(sdp_ctx.filename, sizeof(sdp_ctx.filename),
1445 "rtsp", NULL, addr, -1, NULL);
1446 ctx_array[0] = &sdp_ctx;
1447 if (avf_sdp_create(ctx_array, 1, sdp, 8192)) {
1449 return AVERROR_INVALIDDATA;
1451 av_log(s, AV_LOG_INFO, "SDP:\n%s\n", sdp);
1452 ff_rtsp_send_cmd_with_content(s, "ANNOUNCE", rt->control_uri,
1453 "Content-Type: application/sdp\r\n",
1454 reply, NULL, sdp, strlen(sdp));
1456 if (reply->status_code != RTSP_STATUS_OK)
1457 return AVERROR_INVALIDDATA;
1459 /* Set up the RTSPStreams for each AVStream */
1460 for (i = 0; i < s->nb_streams; i++) {
1461 RTSPStream *rtsp_st;
1462 AVStream *st = s->streams[i];
1464 rtsp_st = av_mallocz(sizeof(RTSPStream));
1466 return AVERROR(ENOMEM);
1467 dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st);
1469 st->priv_data = rtsp_st;
1470 rtsp_st->stream_index = i;
1472 av_strlcpy(rtsp_st->control_url, rt->control_uri, sizeof(rtsp_st->control_url));
1473 /* Note, this must match the relative uri set in the sdp content */
1474 av_strlcatf(rtsp_st->control_url, sizeof(rtsp_st->control_url),
1481 void ff_rtsp_close_connections(AVFormatContext *s)
1483 RTSPState *rt = s->priv_data;
1484 if (rt->rtsp_hd_out != rt->rtsp_hd) url_close(rt->rtsp_hd_out);
1485 url_close(rt->rtsp_hd);
1486 rt->rtsp_hd = rt->rtsp_hd_out = NULL;
1489 int ff_rtsp_connect(AVFormatContext *s)
1491 RTSPState *rt = s->priv_data;
1492 char host[1024], path[1024], tcpname[1024], cmd[2048], auth[128];
1493 char *option_list, *option, *filename;
1494 int port, err, tcp_fd;
1495 RTSPMessageHeader reply1 = {}, *reply = &reply1;
1496 int lower_transport_mask = 0;
1497 char real_challenge[64];
1498 struct sockaddr_storage peer;
1499 socklen_t peer_len = sizeof(peer);
1501 if (!ff_network_init())
1502 return AVERROR(EIO);
1504 rt->control_transport = RTSP_MODE_PLAIN;
1505 /* extract hostname and port */
1506 ff_url_split(NULL, 0, auth, sizeof(auth),
1507 host, sizeof(host), &port, path, sizeof(path), s->filename);
1509 av_strlcpy(rt->auth, auth, sizeof(rt->auth));
1512 port = RTSP_DEFAULT_PORT;
1514 /* search for options */
1515 option_list = strrchr(path, '?');
1517 /* Strip out the RTSP specific options, write out the rest of
1518 * the options back into the same string. */
1519 filename = option_list;
1520 while (option_list) {
1521 /* move the option pointer */
1522 option = ++option_list;
1523 option_list = strchr(option_list, '&');
1527 /* handle the options */
1528 if (!strcmp(option, "udp")) {
1529 lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_UDP);
1530 } else if (!strcmp(option, "multicast")) {
1531 lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_UDP_MULTICAST);
1532 } else if (!strcmp(option, "tcp")) {
1533 lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_TCP);
1534 } else if(!strcmp(option, "http")) {
1535 lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_TCP);
1536 rt->control_transport = RTSP_MODE_TUNNEL;
1538 /* Write options back into the buffer, using memmove instead
1539 * of strcpy since the strings may overlap. */
1540 int len = strlen(option);
1541 memmove(++filename, option, len);
1543 if (option_list) *filename = '&';
1549 if (!lower_transport_mask)
1550 lower_transport_mask = (1 << RTSP_LOWER_TRANSPORT_NB) - 1;
1553 /* Only UDP or TCP - UDP multicast isn't supported. */
1554 lower_transport_mask &= (1 << RTSP_LOWER_TRANSPORT_UDP) |
1555 (1 << RTSP_LOWER_TRANSPORT_TCP);
1556 if (!lower_transport_mask || rt->control_transport == RTSP_MODE_TUNNEL) {
1557 av_log(s, AV_LOG_ERROR, "Unsupported lower transport method, "
1558 "only UDP and TCP are supported for output.\n");
1559 err = AVERROR(EINVAL);
1564 /* Construct the URI used in request; this is similar to s->filename,
1565 * but with authentication credentials removed and RTSP specific options
1567 ff_url_join(rt->control_uri, sizeof(rt->control_uri), "rtsp", NULL,
1568 host, port, "%s", path);
1570 if (rt->control_transport == RTSP_MODE_TUNNEL) {
1571 /* set up initial handshake for tunneling */
1572 char httpname[1024];
1573 char sessioncookie[17];
1576 ff_url_join(httpname, sizeof(httpname), "http", auth, host, port, "%s", path);
1577 snprintf(sessioncookie, sizeof(sessioncookie), "%08x%08x",
1578 av_get_random_seed(), av_get_random_seed());
1581 if (url_open(&rt->rtsp_hd, httpname, URL_RDONLY) < 0) {
1586 /* generate GET headers */
1587 snprintf(headers, sizeof(headers),
1588 "x-sessioncookie: %s\r\n"
1589 "Accept: application/x-rtsp-tunnelled\r\n"
1590 "Pragma: no-cache\r\n"
1591 "Cache-Control: no-cache\r\n",
1593 ff_http_set_headers(rt->rtsp_hd, headers);
1595 /* complete the connection */
1596 if (url_read(rt->rtsp_hd, NULL, 0)) {
1602 if (url_open(&rt->rtsp_hd_out, httpname, URL_WRONLY) < 0 ) {
1607 /* generate POST headers */
1608 snprintf(headers, sizeof(headers),
1609 "x-sessioncookie: %s\r\n"
1610 "Content-Type: application/x-rtsp-tunnelled\r\n"
1611 "Pragma: no-cache\r\n"
1612 "Cache-Control: no-cache\r\n"
1613 "Content-Length: 32767\r\n"
1614 "Expires: Sun, 9 Jan 1972 00:00:00 GMT\r\n",
1616 ff_http_set_headers(rt->rtsp_hd_out, headers);
1617 ff_http_set_chunked_transfer_encoding(rt->rtsp_hd_out, 0);
1619 /* Initialize the authentication state for the POST session. The HTTP
1620 * protocol implementation doesn't properly handle multi-pass
1621 * authentication for POST requests, since it would require one of
1623 * - implementing Expect: 100-continue, which many HTTP servers
1624 * don't support anyway, even less the RTSP servers that do HTTP
1626 * - sending the whole POST data until getting a 401 reply specifying
1627 * what authentication method to use, then resending all that data
1628 * - waiting for potential 401 replies directly after sending the
1629 * POST header (waiting for some unspecified time)
1630 * Therefore, we copy the full auth state, which works for both basic
1631 * and digest. (For digest, we would have to synchronize the nonce
1632 * count variable between the two sessions, if we'd do more requests
1633 * with the original session, though.)
1635 ff_http_init_auth_state(rt->rtsp_hd_out, rt->rtsp_hd);
1638 /* open the tcp connection */
1639 ff_url_join(tcpname, sizeof(tcpname), "tcp", NULL, host, port, NULL);
1640 if (url_open(&rt->rtsp_hd, tcpname, URL_RDWR) < 0) {
1644 rt->rtsp_hd_out = rt->rtsp_hd;
1648 tcp_fd = url_get_file_handle(rt->rtsp_hd);
1649 if (!getpeername(tcp_fd, (struct sockaddr*) &peer, &peer_len)) {
1650 getnameinfo((struct sockaddr*) &peer, peer_len, host, sizeof(host),
1651 NULL, 0, NI_NUMERICHOST);
1654 /* request options supported by the server; this also detects server
1656 for (rt->server_type = RTSP_SERVER_RTP;;) {
1658 if (rt->server_type == RTSP_SERVER_REAL)
1661 * The following entries are required for proper
1662 * streaming from a Realmedia server. They are
1663 * interdependent in some way although we currently
1664 * don't quite understand how. Values were copied
1665 * from mplayer SVN r23589.
1666 * @param CompanyID is a 16-byte ID in base64
1667 * @param ClientChallenge is a 16-byte ID in hex
1669 "ClientChallenge: 9e26d33f2984236010ef6253fb1887f7\r\n"
1670 "PlayerStarttime: [28/03/2003:22:50:23 00:00]\r\n"
1671 "CompanyID: KnKV4M4I/B2FjJ1TToLycw==\r\n"
1672 "GUID: 00000000-0000-0000-0000-000000000000\r\n",
1674 ff_rtsp_send_cmd(s, "OPTIONS", rt->control_uri, cmd, reply, NULL);
1675 if (reply->status_code != RTSP_STATUS_OK) {
1676 err = AVERROR_INVALIDDATA;
1680 /* detect server type if not standard-compliant RTP */
1681 if (rt->server_type != RTSP_SERVER_REAL && reply->real_challenge[0]) {
1682 rt->server_type = RTSP_SERVER_REAL;
1684 } else if (!strncasecmp(reply->server, "WMServer/", 9)) {
1685 rt->server_type = RTSP_SERVER_WMS;
1686 } else if (rt->server_type == RTSP_SERVER_REAL)
1687 strcpy(real_challenge, reply->real_challenge);
1692 err = rtsp_setup_input_streams(s, reply);
1694 err = rtsp_setup_output_streams(s, host);
1699 int lower_transport = ff_log2_tab[lower_transport_mask &
1700 ~(lower_transport_mask - 1)];
1702 err = make_setup_request(s, host, port, lower_transport,
1703 rt->server_type == RTSP_SERVER_REAL ?
1704 real_challenge : NULL);
1707 lower_transport_mask &= ~(1 << lower_transport);
1708 if (lower_transport_mask == 0 && err == 1) {
1709 err = FF_NETERROR(EPROTONOSUPPORT);
1714 rt->state = RTSP_STATE_IDLE;
1715 rt->seek_timestamp = 0; /* default is to start stream at position zero */
1718 ff_rtsp_close_streams(s);
1719 ff_rtsp_close_connections(s);
1720 if (reply->status_code >=300 && reply->status_code < 400 && s->iformat) {
1721 av_strlcpy(s->filename, reply->location, sizeof(s->filename));
1722 av_log(s, AV_LOG_INFO, "Status %d: Redirecting to %s\n",
1732 #if CONFIG_RTSP_DEMUXER
1733 static int rtsp_read_header(AVFormatContext *s,
1734 AVFormatParameters *ap)
1738 ret = ff_rtsp_connect(s);
1742 if (ap->initial_pause) {
1743 /* do not start immediately */
1745 if (rtsp_read_play(s) < 0) {
1746 ff_rtsp_close_streams(s);
1747 ff_rtsp_close_connections(s);
1748 return AVERROR_INVALIDDATA;
1755 static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1756 uint8_t *buf, int buf_size)
1758 RTSPState *rt = s->priv_data;
1759 RTSPStream *rtsp_st;
1761 int fd, fd_max, n, i, ret, tcp_fd, timeout_cnt = 0;
1765 if (url_interrupt_cb())
1766 return AVERROR(EINTR);
1769 tcp_fd = fd_max = url_get_file_handle(rt->rtsp_hd);
1770 FD_SET(tcp_fd, &rfds);
1775 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1776 rtsp_st = rt->rtsp_streams[i];
1777 if (rtsp_st->rtp_handle) {
1778 /* currently, we cannot probe RTCP handle because of
1779 * blocking restrictions */
1780 fd = url_get_file_handle(rtsp_st->rtp_handle);
1787 tv.tv_usec = SELECT_TIMEOUT_MS * 1000;
1788 n = select(fd_max + 1, &rfds, NULL, NULL, &tv);
1791 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1792 rtsp_st = rt->rtsp_streams[i];
1793 if (rtsp_st->rtp_handle) {
1794 fd = url_get_file_handle(rtsp_st->rtp_handle);
1795 if (FD_ISSET(fd, &rfds)) {
1796 ret = url_read(rtsp_st->rtp_handle, buf, buf_size);
1798 *prtsp_st = rtsp_st;
1804 #if CONFIG_RTSP_DEMUXER
1805 if (tcp_fd != -1 && FD_ISSET(tcp_fd, &rfds)) {
1806 RTSPMessageHeader reply;
1808 ret = ff_rtsp_read_reply(s, &reply, NULL, 0);
1811 /* XXX: parse message */
1812 if (rt->state != RTSP_STATE_STREAMING)
1816 } else if (n == 0 && ++timeout_cnt >= MAX_TIMEOUTS) {
1817 return FF_NETERROR(ETIMEDOUT);
1818 } else if (n < 0 && errno != EINTR)
1819 return AVERROR(errno);
1823 static int tcp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1824 uint8_t *buf, int buf_size)
1826 RTSPState *rt = s->priv_data;
1827 int id, len, i, ret;
1828 RTSPStream *rtsp_st;
1830 #ifdef DEBUG_RTP_TCP
1831 dprintf(s, "tcp_read_packet:\n");
1835 RTSPMessageHeader reply;
1837 ret = ff_rtsp_read_reply(s, &reply, NULL, 1);
1840 if (ret == 1) /* received '$' */
1842 /* XXX: parse message */
1843 if (rt->state != RTSP_STATE_STREAMING)
1846 ret = url_read_complete(rt->rtsp_hd, buf, 3);
1850 len = AV_RB16(buf + 1);
1851 #ifdef DEBUG_RTP_TCP
1852 dprintf(s, "id=%d len=%d\n", id, len);
1854 if (len > buf_size || len < 12)
1857 ret = url_read_complete(rt->rtsp_hd, buf, len);
1860 if (rt->transport == RTSP_TRANSPORT_RDT &&
1861 ff_rdt_parse_header(buf, len, &id, NULL, NULL, NULL, NULL) < 0)
1864 /* find the matching stream */
1865 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1866 rtsp_st = rt->rtsp_streams[i];
1867 if (id >= rtsp_st->interleaved_min &&
1868 id <= rtsp_st->interleaved_max)
1873 *prtsp_st = rtsp_st;
1877 static int rtsp_fetch_packet(AVFormatContext *s, AVPacket *pkt)
1879 RTSPState *rt = s->priv_data;
1881 uint8_t buf[10 * RTP_MAX_PACKET_LENGTH];
1882 RTSPStream *rtsp_st;
1884 /* get next frames from the same RTP packet */
1885 if (rt->cur_transport_priv) {
1886 if (rt->transport == RTSP_TRANSPORT_RDT) {
1887 ret = ff_rdt_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
1889 ret = rtp_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
1891 rt->cur_transport_priv = NULL;
1893 } else if (ret == 1) {
1896 rt->cur_transport_priv = NULL;
1899 /* read next RTP packet */
1901 switch(rt->lower_transport) {
1903 #if CONFIG_RTSP_DEMUXER
1904 case RTSP_LOWER_TRANSPORT_TCP:
1905 len = tcp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1908 case RTSP_LOWER_TRANSPORT_UDP:
1909 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
1910 len = udp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1911 if (len >=0 && rtsp_st->transport_priv && rt->transport == RTSP_TRANSPORT_RTP)
1912 rtp_check_and_send_back_rr(rtsp_st->transport_priv, len);
1919 if (rt->transport == RTSP_TRANSPORT_RDT) {
1920 ret = ff_rdt_parse_packet(rtsp_st->transport_priv, pkt, buf, len);
1922 ret = rtp_parse_packet(rtsp_st->transport_priv, pkt, buf, len);
1924 /* Either bad packet, or a RTCP packet. Check if the
1925 * first_rtcp_ntp_time field was initialized. */
1926 RTPDemuxContext *rtpctx = rtsp_st->transport_priv;
1927 if (rtpctx->first_rtcp_ntp_time != AV_NOPTS_VALUE) {
1928 /* first_rtcp_ntp_time has been initialized for this stream,
1929 * copy the same value to all other uninitialized streams,
1930 * in order to map their timestamp origin to the same ntp time
1933 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1934 RTPDemuxContext *rtpctx2 = rtsp_st->transport_priv;
1936 rtpctx2->first_rtcp_ntp_time == AV_NOPTS_VALUE)
1937 rtpctx2->first_rtcp_ntp_time = rtpctx->first_rtcp_ntp_time;
1945 /* more packets may follow, so we save the RTP context */
1946 rt->cur_transport_priv = rtsp_st->transport_priv;
1951 static int rtsp_read_packet(AVFormatContext *s, AVPacket *pkt)
1953 RTSPState *rt = s->priv_data;
1955 RTSPMessageHeader reply1, *reply = &reply1;
1958 if (rt->server_type == RTSP_SERVER_REAL) {
1960 enum AVDiscard cache[MAX_STREAMS];
1962 for (i = 0; i < s->nb_streams; i++)
1963 cache[i] = s->streams[i]->discard;
1965 if (!rt->need_subscription) {
1966 if (memcmp (cache, rt->real_setup_cache,
1967 sizeof(enum AVDiscard) * s->nb_streams)) {
1968 snprintf(cmd, sizeof(cmd),
1969 "Unsubscribe: %s\r\n",
1970 rt->last_subscription);
1971 ff_rtsp_send_cmd(s, "SET_PARAMETER", rt->control_uri,
1973 if (reply->status_code != RTSP_STATUS_OK)
1974 return AVERROR_INVALIDDATA;
1975 rt->need_subscription = 1;
1979 if (rt->need_subscription) {
1980 int r, rule_nr, first = 1;
1982 memcpy(rt->real_setup_cache, cache,
1983 sizeof(enum AVDiscard) * s->nb_streams);
1984 rt->last_subscription[0] = 0;
1986 snprintf(cmd, sizeof(cmd),
1988 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1990 for (r = 0; r < s->nb_streams; r++) {
1991 if (s->streams[r]->priv_data == rt->rtsp_streams[i]) {
1992 if (s->streams[r]->discard != AVDISCARD_ALL) {
1994 av_strlcat(rt->last_subscription, ",",
1995 sizeof(rt->last_subscription));
1996 ff_rdt_subscribe_rule(
1997 rt->last_subscription,
1998 sizeof(rt->last_subscription), i, rule_nr);
2005 av_strlcatf(cmd, sizeof(cmd), "%s\r\n", rt->last_subscription);
2006 ff_rtsp_send_cmd(s, "SET_PARAMETER", rt->control_uri,
2008 if (reply->status_code != RTSP_STATUS_OK)
2009 return AVERROR_INVALIDDATA;
2010 rt->need_subscription = 0;
2012 if (rt->state == RTSP_STATE_STREAMING)
2017 ret = rtsp_fetch_packet(s, pkt);
2021 /* send dummy request to keep TCP connection alive */
2022 if ((rt->server_type == RTSP_SERVER_WMS ||
2023 rt->server_type == RTSP_SERVER_REAL) &&
2024 (av_gettime() - rt->last_cmd_time) / 1000000 >= rt->timeout / 2) {
2025 if (rt->server_type == RTSP_SERVER_WMS) {
2026 ff_rtsp_send_cmd_async(s, "GET_PARAMETER", rt->control_uri, NULL);
2028 ff_rtsp_send_cmd_async(s, "OPTIONS", "*", NULL);
2035 /* pause the stream */
2036 static int rtsp_read_pause(AVFormatContext *s)
2038 RTSPState *rt = s->priv_data;
2039 RTSPMessageHeader reply1, *reply = &reply1;
2041 if (rt->state != RTSP_STATE_STREAMING)
2043 else if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) {
2044 ff_rtsp_send_cmd(s, "PAUSE", rt->control_uri, NULL, reply, NULL);
2045 if (reply->status_code != RTSP_STATUS_OK) {
2049 rt->state = RTSP_STATE_PAUSED;
2053 static int rtsp_read_seek(AVFormatContext *s, int stream_index,
2054 int64_t timestamp, int flags)
2056 RTSPState *rt = s->priv_data;
2058 rt->seek_timestamp = av_rescale_q(timestamp,
2059 s->streams[stream_index]->time_base,
2063 case RTSP_STATE_IDLE:
2065 case RTSP_STATE_STREAMING:
2066 if (rtsp_read_pause(s) != 0)
2068 rt->state = RTSP_STATE_SEEKING;
2069 if (rtsp_read_play(s) != 0)
2072 case RTSP_STATE_PAUSED:
2073 rt->state = RTSP_STATE_IDLE;
2079 static int rtsp_read_close(AVFormatContext *s)
2081 RTSPState *rt = s->priv_data;
2084 /* NOTE: it is valid to flush the buffer here */
2085 if (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
2086 url_fclose(&rt->rtsp_gb);
2089 ff_rtsp_send_cmd_async(s, "TEARDOWN", rt->control_uri, NULL);
2091 ff_rtsp_close_streams(s);
2092 ff_rtsp_close_connections(s);
2097 AVInputFormat rtsp_demuxer = {
2099 NULL_IF_CONFIG_SMALL("RTSP input format"),
2106 .flags = AVFMT_NOFILE,
2107 .read_play = rtsp_read_play,
2108 .read_pause = rtsp_read_pause,
2112 static int sdp_probe(AVProbeData *p1)
2114 const char *p = p1->buf, *p_end = p1->buf + p1->buf_size;
2116 /* we look for a line beginning "c=IN IP4" */
2117 while (p < p_end && *p != '\0') {
2118 if (p + sizeof("c=IN IP4") - 1 < p_end &&
2119 av_strstart(p, "c=IN IP4", NULL))
2120 return AVPROBE_SCORE_MAX / 2;
2122 while (p < p_end - 1 && *p != '\n') p++;
2131 #define SDP_MAX_SIZE 8192
2133 static int sdp_read_header(AVFormatContext *s, AVFormatParameters *ap)
2135 RTSPState *rt = s->priv_data;
2136 RTSPStream *rtsp_st;
2141 if (!ff_network_init())
2142 return AVERROR(EIO);
2144 /* read the whole sdp file */
2145 /* XXX: better loading */
2146 content = av_malloc(SDP_MAX_SIZE);
2147 size = get_buffer(s->pb, content, SDP_MAX_SIZE - 1);
2150 return AVERROR_INVALIDDATA;
2152 content[size] ='\0';
2154 sdp_parse(s, content);
2157 /* open each RTP stream */
2158 for (i = 0; i < rt->nb_rtsp_streams; i++) {
2159 rtsp_st = rt->rtsp_streams[i];
2161 ff_url_join(url, sizeof(url), "rtp", NULL,
2162 inet_ntoa(rtsp_st->sdp_ip), rtsp_st->sdp_port,
2163 "?localport=%d&ttl=%d", rtsp_st->sdp_port,
2165 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
2166 err = AVERROR_INVALIDDATA;
2169 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
2174 ff_rtsp_close_streams(s);
2179 static int sdp_read_close(AVFormatContext *s)
2181 ff_rtsp_close_streams(s);
2186 AVInputFormat sdp_demuxer = {
2188 NULL_IF_CONFIG_SMALL("SDP"),