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"
29 #include <sys/select.h>
33 #include "os_support.h"
38 #include "rtpdec_asf.h"
39 #include "rtpdec_vorbis.h"
42 //#define DEBUG_RTP_TCP
44 #if LIBAVFORMAT_VERSION_INT < (53 << 16)
45 int rtsp_default_protocols = (1 << RTSP_LOWER_TRANSPORT_UDP);
48 #define SPACE_CHARS " \t\r\n"
49 /* we use memchr() instead of strchr() here because strchr() will return
50 * the terminating '\0' of SPACE_CHARS instead of NULL if c is '\0'. */
51 #define redir_isspace(c) memchr(SPACE_CHARS, c, 4)
52 static void skip_spaces(const char **pp)
56 while (redir_isspace(*p))
61 static void get_word_until_chars(char *buf, int buf_size,
62 const char *sep, const char **pp)
70 while (!strchr(sep, *p) && *p != '\0') {
71 if ((q - buf) < buf_size - 1)
80 static void get_word_sep(char *buf, int buf_size, const char *sep,
83 if (**pp == '/') (*pp)++;
84 get_word_until_chars(buf, buf_size, sep, pp);
87 static void get_word(char *buf, int buf_size, const char **pp)
89 get_word_until_chars(buf, buf_size, SPACE_CHARS, pp);
92 /* parse the rtpmap description: <codec_name>/<clock_rate>[/<other params>] */
93 static int sdp_parse_rtpmap(AVFormatContext *s,
94 AVCodecContext *codec, RTSPStream *rtsp_st,
95 int payload_type, const char *p)
102 /* Loop into AVRtpDynamicPayloadTypes[] and AVRtpPayloadTypes[] and
103 * see if we can handle this kind of payload.
104 * The space should normally not be there but some Real streams or
105 * particular servers ("RealServer Version 6.1.3.970", see issue 1658)
106 * have a trailing space. */
107 get_word_sep(buf, sizeof(buf), "/ ", &p);
108 if (payload_type >= RTP_PT_PRIVATE) {
109 RTPDynamicProtocolHandler *handler;
110 for (handler = RTPFirstDynamicPayloadHandler;
111 handler; handler = handler->next) {
112 if (!strcasecmp(buf, handler->enc_name) &&
113 codec->codec_type == handler->codec_type) {
114 codec->codec_id = handler->codec_id;
115 rtsp_st->dynamic_handler = handler;
117 rtsp_st->dynamic_protocol_context = handler->open();
122 /* We are in a standard case
123 * (from http://www.iana.org/assignments/rtp-parameters). */
124 /* search into AVRtpPayloadTypes[] */
125 codec->codec_id = ff_rtp_codec_id(buf, codec->codec_type);
128 c = avcodec_find_decoder(codec->codec_id);
134 get_word_sep(buf, sizeof(buf), "/", &p);
136 switch (codec->codec_type) {
137 case CODEC_TYPE_AUDIO:
138 av_log(s, AV_LOG_DEBUG, "audio codec set to: %s\n", c_name);
139 codec->sample_rate = RTSP_DEFAULT_AUDIO_SAMPLERATE;
140 codec->channels = RTSP_DEFAULT_NB_AUDIO_CHANNELS;
142 codec->sample_rate = i;
143 get_word_sep(buf, sizeof(buf), "/", &p);
147 // TODO: there is a bug here; if it is a mono stream, and
148 // less than 22000Hz, faad upconverts to stereo and twice
149 // the frequency. No problem, but the sample rate is being
150 // set here by the sdp line. Patch on its way. (rdm)
152 av_log(s, AV_LOG_DEBUG, "audio samplerate set to: %i\n",
154 av_log(s, AV_LOG_DEBUG, "audio channels set to: %i\n",
157 case CODEC_TYPE_VIDEO:
158 av_log(s, AV_LOG_DEBUG, "video codec set to: %s\n", c_name);
166 /* return the length and optionally the data */
167 static int hex_to_data(uint8_t *data, const char *p)
177 c = toupper((unsigned char) *p++);
178 if (c >= '0' && c <= '9')
180 else if (c >= 'A' && c <= 'F')
195 static void sdp_parse_fmtp_config(AVCodecContext * codec, void *ctx,
196 char *attr, char *value)
198 switch (codec->codec_id) {
201 if (!strcmp(attr, "config")) {
202 /* decode the hexa encoded parameter */
203 int len = hex_to_data(NULL, value);
204 if (codec->extradata)
205 av_free(codec->extradata);
206 codec->extradata = av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE);
207 if (!codec->extradata)
209 codec->extradata_size = len;
210 hex_to_data(codec->extradata, value);
213 case CODEC_ID_VORBIS:
214 ff_vorbis_parse_fmtp_config(codec, ctx, attr, value);
228 /* All known fmtp parmeters and the corresping RTPAttrTypeEnum */
229 #define ATTR_NAME_TYPE_INT 0
230 #define ATTR_NAME_TYPE_STR 1
231 static const AttrNameMap attr_names[]=
233 { "SizeLength", ATTR_NAME_TYPE_INT,
234 offsetof(RTPPayloadData, sizelength) },
235 { "IndexLength", ATTR_NAME_TYPE_INT,
236 offsetof(RTPPayloadData, indexlength) },
237 { "IndexDeltaLength", ATTR_NAME_TYPE_INT,
238 offsetof(RTPPayloadData, indexdeltalength) },
239 { "profile-level-id", ATTR_NAME_TYPE_INT,
240 offsetof(RTPPayloadData, profile_level_id) },
241 { "StreamType", ATTR_NAME_TYPE_INT,
242 offsetof(RTPPayloadData, streamtype) },
243 { "mode", ATTR_NAME_TYPE_STR,
244 offsetof(RTPPayloadData, mode) },
248 /* parse the attribute line from the fmtp a line of an sdp resonse. This
249 * is broken out as a function because it is used in rtp_h264.c, which is
251 int ff_rtsp_next_attr_and_value(const char **p, char *attr, int attr_size,
252 char *value, int value_size)
256 get_word_sep(attr, attr_size, "=", p);
259 get_word_sep(value, value_size, ";", p);
267 /* parse a SDP line and save stream attributes */
268 static void sdp_parse_fmtp(AVStream *st, const char *p)
271 /* Vorbis setup headers can be up to 12KB and are sent base64
272 * encoded, giving a 12KB * (4/3) = 16KB FMTP line. */
275 RTSPStream *rtsp_st = st->priv_data;
276 AVCodecContext *codec = st->codec;
277 RTPPayloadData *rtp_payload_data = &rtsp_st->rtp_payload_data;
279 /* loop on each attribute */
280 while (ff_rtsp_next_attr_and_value(&p, attr, sizeof(attr),
281 value, sizeof(value))) {
282 /* grab the codec extra_data from the config parameter of the fmtp
284 sdp_parse_fmtp_config(codec, rtsp_st->dynamic_protocol_context,
286 /* Looking for a known attribute */
287 for (i = 0; attr_names[i].str; ++i) {
288 if (!strcasecmp(attr, attr_names[i].str)) {
289 if (attr_names[i].type == ATTR_NAME_TYPE_INT) {
290 *(int *)((char *)rtp_payload_data +
291 attr_names[i].offset) = atoi(value);
292 } else if (attr_names[i].type == ATTR_NAME_TYPE_STR)
293 *(char **)((char *)rtp_payload_data +
294 attr_names[i].offset) = av_strdup(value);
300 /** Parse a string p in the form of Range:npt=xx-xx, and determine the start
302 * Used for seeking in the rtp stream.
304 static void rtsp_parse_range_npt(const char *p, int64_t *start, int64_t *end)
309 if (!av_stristart(p, "npt=", &p))
312 *start = AV_NOPTS_VALUE;
313 *end = AV_NOPTS_VALUE;
315 get_word_sep(buf, sizeof(buf), "-", &p);
316 *start = parse_date(buf, 1);
319 get_word_sep(buf, sizeof(buf), "-", &p);
320 *end = parse_date(buf, 1);
322 // av_log(NULL, AV_LOG_DEBUG, "Range Start: %lld\n", *start);
323 // av_log(NULL, AV_LOG_DEBUG, "Range End: %lld\n", *end);
326 typedef struct SDPParseState {
328 struct in_addr default_ip;
330 int skip_media; ///< set if an unknown m= line occurs
333 static void sdp_parse_line(AVFormatContext *s, SDPParseState *s1,
334 int letter, const char *buf)
336 RTSPState *rt = s->priv_data;
337 char buf1[64], st_type[64];
339 enum CodecType codec_type;
343 struct in_addr sdp_ip;
346 dprintf(s, "sdp: %c='%s'\n", letter, buf);
349 if (s1->skip_media && letter != 'm')
353 get_word(buf1, sizeof(buf1), &p);
354 if (strcmp(buf1, "IN") != 0)
356 get_word(buf1, sizeof(buf1), &p);
357 if (strcmp(buf1, "IP4") != 0)
359 get_word_sep(buf1, sizeof(buf1), "/", &p);
360 if (ff_inet_aton(buf1, &sdp_ip) == 0)
365 get_word_sep(buf1, sizeof(buf1), "/", &p);
368 if (s->nb_streams == 0) {
369 s1->default_ip = sdp_ip;
370 s1->default_ttl = ttl;
372 st = s->streams[s->nb_streams - 1];
373 rtsp_st = st->priv_data;
374 rtsp_st->sdp_ip = sdp_ip;
375 rtsp_st->sdp_ttl = ttl;
379 av_metadata_set(&s->metadata, "title", p);
382 if (s->nb_streams == 0) {
383 av_metadata_set(&s->metadata, "comment", p);
390 get_word(st_type, sizeof(st_type), &p);
391 if (!strcmp(st_type, "audio")) {
392 codec_type = CODEC_TYPE_AUDIO;
393 } else if (!strcmp(st_type, "video")) {
394 codec_type = CODEC_TYPE_VIDEO;
395 } else if (!strcmp(st_type, "application")) {
396 codec_type = CODEC_TYPE_DATA;
401 rtsp_st = av_mallocz(sizeof(RTSPStream));
404 rtsp_st->stream_index = -1;
405 dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st);
407 rtsp_st->sdp_ip = s1->default_ip;
408 rtsp_st->sdp_ttl = s1->default_ttl;
410 get_word(buf1, sizeof(buf1), &p); /* port */
411 rtsp_st->sdp_port = atoi(buf1);
413 get_word(buf1, sizeof(buf1), &p); /* protocol (ignored) */
415 /* XXX: handle list of formats */
416 get_word(buf1, sizeof(buf1), &p); /* format list */
417 rtsp_st->sdp_payload_type = atoi(buf1);
419 if (!strcmp(ff_rtp_enc_name(rtsp_st->sdp_payload_type), "MP2T")) {
420 /* no corresponding stream */
422 st = av_new_stream(s, 0);
425 st->priv_data = rtsp_st;
426 rtsp_st->stream_index = st->index;
427 st->codec->codec_type = codec_type;
428 if (rtsp_st->sdp_payload_type < RTP_PT_PRIVATE) {
429 /* if standard payload type, we can find the codec right now */
430 ff_rtp_get_codec_info(st->codec, rtsp_st->sdp_payload_type);
433 /* put a default control url */
434 av_strlcpy(rtsp_st->control_url, rt->control_uri,
435 sizeof(rtsp_st->control_url));
438 if (av_strstart(p, "control:", &p)) {
439 if (s->nb_streams == 0) {
440 if (!strncmp(p, "rtsp://", 7))
441 av_strlcpy(rt->control_uri, p,
442 sizeof(rt->control_uri));
445 /* get the control url */
446 st = s->streams[s->nb_streams - 1];
447 rtsp_st = st->priv_data;
449 /* XXX: may need to add full url resolution */
450 ff_url_split(proto, sizeof(proto), NULL, 0, NULL, 0,
452 if (proto[0] == '\0') {
453 /* relative control URL */
454 if (rtsp_st->control_url[strlen(rtsp_st->control_url)-1]!='/')
455 av_strlcat(rtsp_st->control_url, "/",
456 sizeof(rtsp_st->control_url));
457 av_strlcat(rtsp_st->control_url, p,
458 sizeof(rtsp_st->control_url));
460 av_strlcpy(rtsp_st->control_url, p,
461 sizeof(rtsp_st->control_url));
463 } else if (av_strstart(p, "rtpmap:", &p) && s->nb_streams > 0) {
464 /* NOTE: rtpmap is only supported AFTER the 'm=' tag */
465 get_word(buf1, sizeof(buf1), &p);
466 payload_type = atoi(buf1);
467 st = s->streams[s->nb_streams - 1];
468 rtsp_st = st->priv_data;
469 sdp_parse_rtpmap(s, st->codec, rtsp_st, payload_type, p);
470 } else if (av_strstart(p, "fmtp:", &p)) {
471 /* NOTE: fmtp is only supported AFTER the 'a=rtpmap:xxx' tag */
472 get_word(buf1, sizeof(buf1), &p);
473 payload_type = atoi(buf1);
474 for (i = 0; i < s->nb_streams; i++) {
476 rtsp_st = st->priv_data;
477 if (rtsp_st->sdp_payload_type == payload_type) {
478 if (!(rtsp_st->dynamic_handler &&
479 rtsp_st->dynamic_handler->parse_sdp_a_line &&
480 rtsp_st->dynamic_handler->parse_sdp_a_line(s,
481 i, rtsp_st->dynamic_protocol_context, buf)))
482 sdp_parse_fmtp(st, p);
485 } else if (av_strstart(p, "framesize:", &p)) {
486 // let dynamic protocol handlers have a stab at the line.
487 get_word(buf1, sizeof(buf1), &p);
488 payload_type = atoi(buf1);
489 for (i = 0; i < s->nb_streams; i++) {
491 rtsp_st = st->priv_data;
492 if (rtsp_st->sdp_payload_type == payload_type &&
493 rtsp_st->dynamic_handler &&
494 rtsp_st->dynamic_handler->parse_sdp_a_line)
495 rtsp_st->dynamic_handler->parse_sdp_a_line(s, i,
496 rtsp_st->dynamic_protocol_context, buf);
498 } else if (av_strstart(p, "range:", &p)) {
501 // this is so that seeking on a streamed file can work.
502 rtsp_parse_range_npt(p, &start, &end);
503 s->start_time = start;
504 /* AV_NOPTS_VALUE means live broadcast (and can't seek) */
505 s->duration = (end == AV_NOPTS_VALUE) ?
506 AV_NOPTS_VALUE : end - start;
507 } else if (av_strstart(p, "IsRealDataType:integer;",&p)) {
509 rt->transport = RTSP_TRANSPORT_RDT;
511 if (rt->server_type == RTSP_SERVER_WMS)
512 ff_wms_parse_sdp_a_line(s, p);
513 if (s->nb_streams > 0) {
514 if (rt->server_type == RTSP_SERVER_REAL)
515 ff_real_parse_sdp_a_line(s, s->nb_streams - 1, p);
517 rtsp_st = s->streams[s->nb_streams - 1]->priv_data;
518 if (rtsp_st->dynamic_handler &&
519 rtsp_st->dynamic_handler->parse_sdp_a_line)
520 rtsp_st->dynamic_handler->parse_sdp_a_line(s,
522 rtsp_st->dynamic_protocol_context, buf);
529 static int sdp_parse(AVFormatContext *s, const char *content)
533 /* Some SDP lines, particularly for Realmedia or ASF RTSP streams,
534 * contain long SDP lines containing complete ASF Headers (several
535 * kB) or arrays of MDPR (RM stream descriptor) headers plus
536 * "rulebooks" describing their properties. Therefore, the SDP line
539 * The Vorbis FMTP line can be up to 16KB - see sdp_parse_fmtp. */
541 SDPParseState sdp_parse_state, *s1 = &sdp_parse_state;
543 memset(s1, 0, sizeof(SDPParseState));
554 /* get the content */
556 while (*p != '\n' && *p != '\r' && *p != '\0') {
557 if ((q - buf) < sizeof(buf) - 1)
562 sdp_parse_line(s, s1, letter, buf);
564 while (*p != '\n' && *p != '\0')
572 /* close and free RTSP streams */
573 void ff_rtsp_close_streams(AVFormatContext *s)
575 RTSPState *rt = s->priv_data;
579 for (i = 0; i < rt->nb_rtsp_streams; i++) {
580 rtsp_st = rt->rtsp_streams[i];
582 if (rtsp_st->transport_priv) {
584 AVFormatContext *rtpctx = rtsp_st->transport_priv;
585 av_write_trailer(rtpctx);
586 url_fclose(rtpctx->pb);
587 av_metadata_free(&rtpctx->streams[0]->metadata);
588 av_metadata_free(&rtpctx->metadata);
589 av_free(rtpctx->streams[0]);
591 } else if (rt->transport == RTSP_TRANSPORT_RDT)
592 ff_rdt_parse_close(rtsp_st->transport_priv);
594 rtp_parse_close(rtsp_st->transport_priv);
596 if (rtsp_st->rtp_handle)
597 url_close(rtsp_st->rtp_handle);
598 if (rtsp_st->dynamic_handler && rtsp_st->dynamic_protocol_context)
599 rtsp_st->dynamic_handler->close(
600 rtsp_st->dynamic_protocol_context);
603 av_free(rt->rtsp_streams);
605 av_close_input_stream (rt->asf_ctx);
608 av_freep(&rt->auth_b64);
611 static void *rtsp_rtp_mux_open(AVFormatContext *s, AVStream *st, URLContext *handle) {
612 AVFormatContext *rtpctx;
614 AVOutputFormat *rtp_format = av_guess_format("rtp", NULL, NULL);
619 /* Allocate an AVFormatContext for each output stream */
620 rtpctx = avformat_alloc_context();
624 rtpctx->oformat = rtp_format;
625 if (!av_new_stream(rtpctx, 0)) {
629 /* Copy the max delay setting; the rtp muxer reads this. */
630 rtpctx->max_delay = s->max_delay;
631 /* Copy other stream parameters. */
632 rtpctx->streams[0]->sample_aspect_ratio = st->sample_aspect_ratio;
634 /* Remove the local codec, link to the original codec
635 * context instead, to give the rtp muxer access to
636 * codec parameters. */
637 av_free(rtpctx->streams[0]->codec);
638 rtpctx->streams[0]->codec = st->codec;
640 url_fdopen(&rtpctx->pb, handle);
641 ret = av_write_header(rtpctx);
644 url_fclose(rtpctx->pb);
645 av_free(rtpctx->streams[0]);
650 /* Copy the RTP AVStream timebase back to the original AVStream */
651 st->time_base = rtpctx->streams[0]->time_base;
655 static int rtsp_open_transport_ctx(AVFormatContext *s, RTSPStream *rtsp_st)
657 RTSPState *rt = s->priv_data;
660 /* open the RTP context */
661 if (rtsp_st->stream_index >= 0)
662 st = s->streams[rtsp_st->stream_index];
664 s->ctx_flags |= AVFMTCTX_NOHEADER;
667 rtsp_st->transport_priv = rtsp_rtp_mux_open(s, st, rtsp_st->rtp_handle);
668 /* Ownage of rtp_handle is passed to the rtp mux context */
669 rtsp_st->rtp_handle = NULL;
670 } else if (rt->transport == RTSP_TRANSPORT_RDT)
671 rtsp_st->transport_priv = ff_rdt_parse_open(s, st->index,
672 rtsp_st->dynamic_protocol_context,
673 rtsp_st->dynamic_handler);
675 rtsp_st->transport_priv = rtp_parse_open(s, st, rtsp_st->rtp_handle,
676 rtsp_st->sdp_payload_type,
677 &rtsp_st->rtp_payload_data);
679 if (!rtsp_st->transport_priv) {
680 return AVERROR(ENOMEM);
681 } else if (rt->transport != RTSP_TRANSPORT_RDT) {
682 if (rtsp_st->dynamic_handler) {
683 rtp_parse_set_dynamic_protocol(rtsp_st->transport_priv,
684 rtsp_st->dynamic_protocol_context,
685 rtsp_st->dynamic_handler);
692 #if CONFIG_RTSP_DEMUXER || CONFIG_RTSP_MUXER
693 static int rtsp_probe(AVProbeData *p)
695 if (av_strstart(p->filename, "rtsp:", NULL))
696 return AVPROBE_SCORE_MAX;
700 static void rtsp_parse_range(int *min_ptr, int *max_ptr, const char **pp)
707 v = strtol(p, (char **)&p, 10);
711 v = strtol(p, (char **)&p, 10);
720 /* XXX: only one transport specification is parsed */
721 static void rtsp_parse_transport(RTSPMessageHeader *reply, const char *p)
723 char transport_protocol[16];
725 char lower_transport[16];
727 RTSPTransportField *th;
730 reply->nb_transports = 0;
737 th = &reply->transports[reply->nb_transports];
739 get_word_sep(transport_protocol, sizeof(transport_protocol),
741 if (!strcasecmp (transport_protocol, "rtp")) {
742 get_word_sep(profile, sizeof(profile), "/;,", &p);
743 lower_transport[0] = '\0';
744 /* rtp/avp/<protocol> */
746 get_word_sep(lower_transport, sizeof(lower_transport),
749 th->transport = RTSP_TRANSPORT_RTP;
750 } else if (!strcasecmp (transport_protocol, "x-pn-tng") ||
751 !strcasecmp (transport_protocol, "x-real-rdt")) {
752 /* x-pn-tng/<protocol> */
753 get_word_sep(lower_transport, sizeof(lower_transport), "/;,", &p);
755 th->transport = RTSP_TRANSPORT_RDT;
757 if (!strcasecmp(lower_transport, "TCP"))
758 th->lower_transport = RTSP_LOWER_TRANSPORT_TCP;
760 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP;
764 /* get each parameter */
765 while (*p != '\0' && *p != ',') {
766 get_word_sep(parameter, sizeof(parameter), "=;,", &p);
767 if (!strcmp(parameter, "port")) {
770 rtsp_parse_range(&th->port_min, &th->port_max, &p);
772 } else if (!strcmp(parameter, "client_port")) {
775 rtsp_parse_range(&th->client_port_min,
776 &th->client_port_max, &p);
778 } else if (!strcmp(parameter, "server_port")) {
781 rtsp_parse_range(&th->server_port_min,
782 &th->server_port_max, &p);
784 } else if (!strcmp(parameter, "interleaved")) {
787 rtsp_parse_range(&th->interleaved_min,
788 &th->interleaved_max, &p);
790 } else if (!strcmp(parameter, "multicast")) {
791 if (th->lower_transport == RTSP_LOWER_TRANSPORT_UDP)
792 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP_MULTICAST;
793 } else if (!strcmp(parameter, "ttl")) {
796 th->ttl = strtol(p, (char **)&p, 10);
798 } else if (!strcmp(parameter, "destination")) {
799 struct in_addr ipaddr;
803 get_word_sep(buf, sizeof(buf), ";,", &p);
804 if (ff_inet_aton(buf, &ipaddr))
805 th->destination = ntohl(ipaddr.s_addr);
808 while (*p != ';' && *p != '\0' && *p != ',')
816 reply->nb_transports++;
820 void ff_rtsp_parse_line(RTSPMessageHeader *reply, const char *buf)
824 /* NOTE: we do case independent match for broken servers */
826 if (av_stristart(p, "Session:", &p)) {
828 get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p);
829 if (av_stristart(p, ";timeout=", &p) &&
830 (t = strtol(p, NULL, 10)) > 0) {
833 } else if (av_stristart(p, "Content-Length:", &p)) {
834 reply->content_length = strtol(p, NULL, 10);
835 } else if (av_stristart(p, "Transport:", &p)) {
836 rtsp_parse_transport(reply, p);
837 } else if (av_stristart(p, "CSeq:", &p)) {
838 reply->seq = strtol(p, NULL, 10);
839 } else if (av_stristart(p, "Range:", &p)) {
840 rtsp_parse_range_npt(p, &reply->range_start, &reply->range_end);
841 } else if (av_stristart(p, "RealChallenge1:", &p)) {
843 av_strlcpy(reply->real_challenge, p, sizeof(reply->real_challenge));
844 } else if (av_stristart(p, "Server:", &p)) {
846 av_strlcpy(reply->server, p, sizeof(reply->server));
847 } else if (av_stristart(p, "Notice:", &p) ||
848 av_stristart(p, "X-Notice:", &p)) {
849 reply->notice = strtol(p, NULL, 10);
850 } else if (av_stristart(p, "Location:", &p)) {
852 av_strlcpy(reply->location, p , sizeof(reply->location));
856 /* skip a RTP/TCP interleaved packet */
857 static void rtsp_skip_packet(AVFormatContext *s)
859 RTSPState *rt = s->priv_data;
863 ret = url_read_complete(rt->rtsp_hd, buf, 3);
866 len = AV_RB16(buf + 1);
868 dprintf(s, "skipping RTP packet len=%d\n", len);
873 if (len1 > sizeof(buf))
875 ret = url_read_complete(rt->rtsp_hd, buf, len1);
882 int ff_rtsp_read_reply(AVFormatContext *s, RTSPMessageHeader *reply,
883 unsigned char **content_ptr,
884 int return_on_interleaved_data)
886 RTSPState *rt = s->priv_data;
887 char buf[4096], buf1[1024], *q;
890 int ret, content_length, line_count = 0;
891 unsigned char *content = NULL;
893 memset(reply, 0, sizeof(*reply));
895 /* parse reply (XXX: use buffers) */
896 rt->last_reply[0] = '\0';
900 ret = url_read_complete(rt->rtsp_hd, &ch, 1);
902 dprintf(s, "ret=%d c=%02x [%c]\n", ret, ch, ch);
909 /* XXX: only parse it if first char on line ? */
910 if (return_on_interleaved_data) {
914 } else if (ch != '\r') {
915 if ((q - buf) < sizeof(buf) - 1)
921 dprintf(s, "line='%s'\n", buf);
923 /* test if last line */
927 if (line_count == 0) {
929 get_word(buf1, sizeof(buf1), &p);
930 get_word(buf1, sizeof(buf1), &p);
931 reply->status_code = atoi(buf1);
933 ff_rtsp_parse_line(reply, p);
934 av_strlcat(rt->last_reply, p, sizeof(rt->last_reply));
935 av_strlcat(rt->last_reply, "\n", sizeof(rt->last_reply));
940 if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0')
941 av_strlcpy(rt->session_id, reply->session_id, sizeof(rt->session_id));
943 content_length = reply->content_length;
944 if (content_length > 0) {
945 /* leave some room for a trailing '\0' (useful for simple parsing) */
946 content = av_malloc(content_length + 1);
947 (void)url_read_complete(rt->rtsp_hd, content, content_length);
948 content[content_length] = '\0';
951 *content_ptr = content;
956 if (reply->notice == 2101 /* End-of-Stream Reached */ ||
957 reply->notice == 2104 /* Start-of-Stream Reached */ ||
958 reply->notice == 2306 /* Continuous Feed Terminated */) {
959 rt->state = RTSP_STATE_IDLE;
960 } else if (reply->notice >= 4400 && reply->notice < 5500) {
961 return AVERROR(EIO); /* data or server error */
962 } else if (reply->notice == 2401 /* Ticket Expired */ ||
963 (reply->notice >= 5500 && reply->notice < 5600) /* end of term */ )
964 return AVERROR(EPERM);
969 void ff_rtsp_send_cmd_with_content_async(AVFormatContext *s,
971 const unsigned char *send_content,
972 int send_content_length)
974 RTSPState *rt = s->priv_data;
975 char buf[4096], buf1[1024];
978 av_strlcpy(buf, cmd, sizeof(buf));
979 snprintf(buf1, sizeof(buf1), "CSeq: %d\r\n", rt->seq);
980 av_strlcat(buf, buf1, sizeof(buf));
981 if (rt->session_id[0] != '\0' && !strstr(cmd, "\nIf-Match:")) {
982 snprintf(buf1, sizeof(buf1), "Session: %s\r\n", rt->session_id);
983 av_strlcat(buf, buf1, sizeof(buf));
986 av_strlcatf(buf, sizeof(buf),
987 "Authorization: Basic %s\r\n",
989 if (send_content_length > 0 && send_content)
990 av_strlcatf(buf, sizeof(buf), "Content-Length: %d\r\n", send_content_length);
991 av_strlcat(buf, "\r\n", sizeof(buf));
993 dprintf(s, "Sending:\n%s--\n", buf);
995 url_write(rt->rtsp_hd, buf, strlen(buf));
996 if (send_content_length > 0 && send_content)
997 url_write(rt->rtsp_hd, send_content, send_content_length);
998 rt->last_cmd_time = av_gettime();
1001 void ff_rtsp_send_cmd_async(AVFormatContext *s, const char *cmd)
1003 ff_rtsp_send_cmd_with_content_async(s, cmd, NULL, 0);
1006 void ff_rtsp_send_cmd(AVFormatContext *s,
1007 const char *cmd, RTSPMessageHeader *reply,
1008 unsigned char **content_ptr)
1010 ff_rtsp_send_cmd_async(s, cmd);
1012 ff_rtsp_read_reply(s, reply, content_ptr, 0);
1015 void ff_rtsp_send_cmd_with_content(AVFormatContext *s,
1017 RTSPMessageHeader *reply,
1018 unsigned char **content_ptr,
1019 const unsigned char *send_content,
1020 int send_content_length)
1022 ff_rtsp_send_cmd_with_content_async(s, cmd, send_content, send_content_length);
1024 ff_rtsp_read_reply(s, reply, content_ptr, 0);
1028 * @returns 0 on success, <0 on error, 1 if protocol is unavailable.
1030 static int make_setup_request(AVFormatContext *s, const char *host, int port,
1031 int lower_transport, const char *real_challenge)
1033 RTSPState *rt = s->priv_data;
1034 int rtx, j, i, err, interleave = 0;
1035 RTSPStream *rtsp_st;
1036 RTSPMessageHeader reply1, *reply = &reply1;
1038 const char *trans_pref;
1040 if (rt->transport == RTSP_TRANSPORT_RDT)
1041 trans_pref = "x-pn-tng";
1043 trans_pref = "RTP/AVP";
1045 /* default timeout: 1 minute */
1048 /* for each stream, make the setup request */
1049 /* XXX: we assume the same server is used for the control of each
1052 for (j = RTSP_RTP_PORT_MIN, i = 0; i < rt->nb_rtsp_streams; ++i) {
1053 char transport[2048];
1056 * WMS serves all UDP data over a single connection, the RTX, which
1057 * isn't necessarily the first in the SDP but has to be the first
1058 * to be set up, else the second/third SETUP will fail with a 461.
1060 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP &&
1061 rt->server_type == RTSP_SERVER_WMS) {
1064 for (rtx = 0; rtx < rt->nb_rtsp_streams; rtx++) {
1065 int len = strlen(rt->rtsp_streams[rtx]->control_url);
1067 !strcmp(rt->rtsp_streams[rtx]->control_url + len - 4,
1071 if (rtx == rt->nb_rtsp_streams)
1072 return -1; /* no RTX found */
1073 rtsp_st = rt->rtsp_streams[rtx];
1075 rtsp_st = rt->rtsp_streams[i > rtx ? i : i - 1];
1077 rtsp_st = rt->rtsp_streams[i];
1080 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP) {
1083 if (rt->server_type == RTSP_SERVER_WMS && i > 1) {
1084 port = reply->transports[0].client_port_min;
1088 /* first try in specified port range */
1089 if (RTSP_RTP_PORT_MIN != 0) {
1090 while (j <= RTSP_RTP_PORT_MAX) {
1091 ff_url_join(buf, sizeof(buf), "rtp", NULL, host, -1,
1092 "?localport=%d", j);
1093 /* we will use two ports per rtp stream (rtp and rtcp) */
1095 if (url_open(&rtsp_st->rtp_handle, buf, URL_RDWR) == 0)
1101 /* then try on any port */
1102 if (url_open(&rtsp_st->rtp_handle, "rtp://", URL_RDONLY) < 0) {
1103 err = AVERROR_INVALIDDATA;
1109 port = rtp_get_local_port(rtsp_st->rtp_handle);
1111 snprintf(transport, sizeof(transport) - 1,
1112 "%s/UDP;", trans_pref);
1113 if (rt->server_type != RTSP_SERVER_REAL)
1114 av_strlcat(transport, "unicast;", sizeof(transport));
1115 av_strlcatf(transport, sizeof(transport),
1116 "client_port=%d", port);
1117 if (rt->transport == RTSP_TRANSPORT_RTP &&
1118 !(rt->server_type == RTSP_SERVER_WMS && i > 0))
1119 av_strlcatf(transport, sizeof(transport), "-%d", port + 1);
1123 else if (lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
1124 /** For WMS streams, the application streams are only used for
1125 * UDP. When trying to set it up for TCP streams, the server
1126 * will return an error. Therefore, we skip those streams. */
1127 if (rt->server_type == RTSP_SERVER_WMS &&
1128 s->streams[rtsp_st->stream_index]->codec->codec_type ==
1131 snprintf(transport, sizeof(transport) - 1,
1132 "%s/TCP;", trans_pref);
1133 if (rt->server_type == RTSP_SERVER_WMS)
1134 av_strlcat(transport, "unicast;", sizeof(transport));
1135 av_strlcatf(transport, sizeof(transport),
1136 "interleaved=%d-%d",
1137 interleave, interleave + 1);
1141 else if (lower_transport == RTSP_LOWER_TRANSPORT_UDP_MULTICAST) {
1142 snprintf(transport, sizeof(transport) - 1,
1143 "%s/UDP;multicast", trans_pref);
1146 av_strlcat(transport, ";mode=receive", sizeof(transport));
1147 } else if (rt->server_type == RTSP_SERVER_REAL ||
1148 rt->server_type == RTSP_SERVER_WMS)
1149 av_strlcat(transport, ";mode=play", sizeof(transport));
1150 snprintf(cmd, sizeof(cmd),
1151 "SETUP %s RTSP/1.0\r\n"
1152 "Transport: %s\r\n",
1153 rtsp_st->control_url, transport);
1154 if (i == 0 && rt->server_type == RTSP_SERVER_REAL) {
1155 char real_res[41], real_csum[9];
1156 ff_rdt_calc_response_and_checksum(real_res, real_csum,
1158 av_strlcatf(cmd, sizeof(cmd),
1160 "RealChallenge2: %s, sd=%s\r\n",
1161 rt->session_id, real_res, real_csum);
1163 ff_rtsp_send_cmd(s, cmd, reply, NULL);
1164 if (reply->status_code == 461 /* Unsupported protocol */ && i == 0) {
1167 } else if (reply->status_code != RTSP_STATUS_OK ||
1168 reply->nb_transports != 1) {
1169 err = AVERROR_INVALIDDATA;
1173 /* XXX: same protocol for all streams is required */
1175 if (reply->transports[0].lower_transport != rt->lower_transport ||
1176 reply->transports[0].transport != rt->transport) {
1177 err = AVERROR_INVALIDDATA;
1181 rt->lower_transport = reply->transports[0].lower_transport;
1182 rt->transport = reply->transports[0].transport;
1185 /* close RTP connection if not choosen */
1186 if (reply->transports[0].lower_transport != RTSP_LOWER_TRANSPORT_UDP &&
1187 (lower_transport == RTSP_LOWER_TRANSPORT_UDP)) {
1188 url_close(rtsp_st->rtp_handle);
1189 rtsp_st->rtp_handle = NULL;
1192 switch(reply->transports[0].lower_transport) {
1193 case RTSP_LOWER_TRANSPORT_TCP:
1194 rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
1195 rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
1198 case RTSP_LOWER_TRANSPORT_UDP: {
1201 /* XXX: also use address if specified */
1202 ff_url_join(url, sizeof(url), "rtp", NULL, host,
1203 reply->transports[0].server_port_min, NULL);
1204 if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) &&
1205 rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
1206 err = AVERROR_INVALIDDATA;
1209 /* Try to initialize the connection state in a
1210 * potential NAT router by sending dummy packets.
1211 * RTP/RTCP dummy packets are used for RDT, too.
1213 if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) && s->iformat)
1214 rtp_send_punch_packets(rtsp_st->rtp_handle);
1217 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST: {
1222 if (reply->transports[0].destination) {
1223 in.s_addr = htonl(reply->transports[0].destination);
1224 port = reply->transports[0].port_min;
1225 ttl = reply->transports[0].ttl;
1227 in = rtsp_st->sdp_ip;
1228 port = rtsp_st->sdp_port;
1229 ttl = rtsp_st->sdp_ttl;
1231 ff_url_join(url, sizeof(url), "rtp", NULL, inet_ntoa(in),
1232 port, "?ttl=%d", ttl);
1233 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1234 err = AVERROR_INVALIDDATA;
1241 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
1245 if (reply->timeout > 0)
1246 rt->timeout = reply->timeout;
1248 if (rt->server_type == RTSP_SERVER_REAL)
1249 rt->need_subscription = 1;
1254 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1255 if (rt->rtsp_streams[i]->rtp_handle) {
1256 url_close(rt->rtsp_streams[i]->rtp_handle);
1257 rt->rtsp_streams[i]->rtp_handle = NULL;
1263 static int rtsp_read_play(AVFormatContext *s)
1265 RTSPState *rt = s->priv_data;
1266 RTSPMessageHeader reply1, *reply = &reply1;
1269 av_log(s, AV_LOG_DEBUG, "hello state=%d\n", rt->state);
1271 if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) {
1272 if (rt->state == RTSP_STATE_PAUSED) {
1273 snprintf(cmd, sizeof(cmd),
1274 "PLAY %s RTSP/1.0\r\n",
1277 snprintf(cmd, sizeof(cmd),
1278 "PLAY %s RTSP/1.0\r\n"
1279 "Range: npt=%0.3f-\r\n",
1281 (double)rt->seek_timestamp / AV_TIME_BASE);
1283 ff_rtsp_send_cmd(s, cmd, reply, NULL);
1284 if (reply->status_code != RTSP_STATUS_OK) {
1288 rt->state = RTSP_STATE_STREAMING;
1292 static int rtsp_setup_input_streams(AVFormatContext *s)
1294 RTSPState *rt = s->priv_data;
1295 RTSPMessageHeader reply1, *reply = &reply1;
1297 unsigned char *content = NULL;
1300 /* describe the stream */
1301 snprintf(cmd, sizeof(cmd),
1302 "DESCRIBE %s RTSP/1.0\r\n"
1303 "Accept: application/sdp\r\n",
1305 if (rt->server_type == RTSP_SERVER_REAL) {
1307 * The Require: attribute is needed for proper streaming from
1308 * Realmedia servers.
1311 "Require: com.real.retain-entity-for-setup\r\n",
1314 ff_rtsp_send_cmd(s, cmd, reply, &content);
1316 return AVERROR_INVALIDDATA;
1317 if (reply->status_code != RTSP_STATUS_OK) {
1319 return AVERROR_INVALIDDATA;
1322 /* now we got the SDP description, we parse it */
1323 ret = sdp_parse(s, (const char *)content);
1326 return AVERROR_INVALIDDATA;
1331 static int rtsp_setup_output_streams(AVFormatContext *s)
1333 RTSPState *rt = s->priv_data;
1334 RTSPMessageHeader reply1, *reply = &reply1;
1339 /* Announce the stream */
1340 snprintf(cmd, sizeof(cmd),
1341 "ANNOUNCE %s RTSP/1.0\r\n"
1342 "Content-Type: application/sdp\r\n",
1344 sdp = av_mallocz(8192);
1346 return AVERROR(ENOMEM);
1347 if (avf_sdp_create(&s, 1, sdp, 8192)) {
1349 return AVERROR_INVALIDDATA;
1351 av_log(s, AV_LOG_INFO, "SDP:\n%s\n", sdp);
1352 ff_rtsp_send_cmd_with_content(s, cmd, reply, NULL, sdp, strlen(sdp));
1354 if (reply->status_code != RTSP_STATUS_OK)
1355 return AVERROR_INVALIDDATA;
1357 /* Set up the RTSPStreams for each AVStream */
1358 for (i = 0; i < s->nb_streams; i++) {
1359 RTSPStream *rtsp_st;
1360 AVStream *st = s->streams[i];
1362 rtsp_st = av_mallocz(sizeof(RTSPStream));
1364 return AVERROR(ENOMEM);
1365 dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st);
1367 st->priv_data = rtsp_st;
1368 rtsp_st->stream_index = i;
1370 av_strlcpy(rtsp_st->control_url, rt->control_uri, sizeof(rtsp_st->control_url));
1371 /* Note, this must match the relative uri set in the sdp content */
1372 av_strlcatf(rtsp_st->control_url, sizeof(rtsp_st->control_url),
1379 int ff_rtsp_connect(AVFormatContext *s)
1381 RTSPState *rt = s->priv_data;
1382 char host[1024], path[1024], tcpname[1024], cmd[2048], auth[128];
1383 char *option_list, *option, *filename;
1384 URLContext *rtsp_hd;
1385 int port, err, tcp_fd;
1386 RTSPMessageHeader reply1, *reply = &reply1;
1387 int lower_transport_mask = 0;
1388 char real_challenge[64];
1389 struct sockaddr_storage peer;
1390 socklen_t peer_len = sizeof(peer);
1392 if (!ff_network_init())
1393 return AVERROR(EIO);
1395 /* extract hostname and port */
1396 ff_url_split(NULL, 0, auth, sizeof(auth),
1397 host, sizeof(host), &port, path, sizeof(path), s->filename);
1399 int auth_len = strlen(auth), b64_len = ((auth_len + 2) / 3) * 4 + 1;
1401 if (!(rt->auth_b64 = av_malloc(b64_len)))
1402 return AVERROR(ENOMEM);
1403 if (!av_base64_encode(rt->auth_b64, b64_len, auth, auth_len)) {
1404 err = AVERROR(EINVAL);
1409 port = RTSP_DEFAULT_PORT;
1411 /* search for options */
1412 option_list = strchr(path, '?');
1414 filename = strchr(s->filename, '?');
1415 while (option_list) {
1416 /* move the option pointer */
1417 option = ++option_list;
1418 option_list = strchr(option_list, '&');
1422 /* handle the options */
1423 if (!strcmp(option, "udp")) {
1424 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_UDP);
1425 } else if (!strcmp(option, "multicast")) {
1426 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_UDP_MULTICAST);
1427 } else if (!strcmp(option, "tcp")) {
1428 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_TCP);
1430 strcpy(++filename, option);
1431 filename += strlen(option);
1432 if (option_list) *filename = '&';
1438 if (!lower_transport_mask)
1439 lower_transport_mask = (1 << RTSP_LOWER_TRANSPORT_NB) - 1;
1442 /* Only UDP output is supported at the moment. */
1443 lower_transport_mask &= 1 << RTSP_LOWER_TRANSPORT_UDP;
1444 if (!lower_transport_mask) {
1445 av_log(s, AV_LOG_ERROR, "Unsupported lower transport method, "
1446 "only UDP is supported for output.\n");
1447 err = AVERROR(EINVAL);
1452 /* open the tcp connexion */
1453 ff_url_join(tcpname, sizeof(tcpname), "tcp", NULL, host, port, NULL);
1454 if (url_open(&rtsp_hd, tcpname, URL_RDWR) < 0) {
1458 rt->rtsp_hd = rtsp_hd;
1461 tcp_fd = url_get_file_handle(rtsp_hd);
1462 if (!getpeername(tcp_fd, (struct sockaddr*) &peer, &peer_len)) {
1463 getnameinfo((struct sockaddr*) &peer, peer_len, host, sizeof(host),
1464 NULL, 0, NI_NUMERICHOST);
1467 /* request options supported by the server; this also detects server
1469 av_strlcpy(rt->control_uri, s->filename,
1470 sizeof(rt->control_uri));
1471 for (rt->server_type = RTSP_SERVER_RTP;;) {
1472 snprintf(cmd, sizeof(cmd),
1473 "OPTIONS %s RTSP/1.0\r\n", rt->control_uri);
1474 if (rt->server_type == RTSP_SERVER_REAL)
1477 * The following entries are required for proper
1478 * streaming from a Realmedia server. They are
1479 * interdependent in some way although we currently
1480 * don't quite understand how. Values were copied
1481 * from mplayer SVN r23589.
1482 * @param CompanyID is a 16-byte ID in base64
1483 * @param ClientChallenge is a 16-byte ID in hex
1485 "ClientChallenge: 9e26d33f2984236010ef6253fb1887f7\r\n"
1486 "PlayerStarttime: [28/03/2003:22:50:23 00:00]\r\n"
1487 "CompanyID: KnKV4M4I/B2FjJ1TToLycw==\r\n"
1488 "GUID: 00000000-0000-0000-0000-000000000000\r\n",
1490 ff_rtsp_send_cmd(s, cmd, reply, NULL);
1491 if (reply->status_code != RTSP_STATUS_OK) {
1492 err = AVERROR_INVALIDDATA;
1496 /* detect server type if not standard-compliant RTP */
1497 if (rt->server_type != RTSP_SERVER_REAL && reply->real_challenge[0]) {
1498 rt->server_type = RTSP_SERVER_REAL;
1500 } else if (!strncasecmp(reply->server, "WMServer/", 9)) {
1501 rt->server_type = RTSP_SERVER_WMS;
1502 } else if (rt->server_type == RTSP_SERVER_REAL)
1503 strcpy(real_challenge, reply->real_challenge);
1508 err = rtsp_setup_input_streams(s);
1510 err = rtsp_setup_output_streams(s);
1515 int lower_transport = ff_log2_tab[lower_transport_mask &
1516 ~(lower_transport_mask - 1)];
1518 err = make_setup_request(s, host, port, lower_transport,
1519 rt->server_type == RTSP_SERVER_REAL ?
1520 real_challenge : NULL);
1523 lower_transport_mask &= ~(1 << lower_transport);
1524 if (lower_transport_mask == 0 && err == 1) {
1525 err = AVERROR(FF_NETERROR(EPROTONOSUPPORT));
1530 rt->state = RTSP_STATE_IDLE;
1531 rt->seek_timestamp = 0; /* default is to start stream at position zero */
1534 ff_rtsp_close_streams(s);
1535 url_close(rt->rtsp_hd);
1536 if (reply->status_code >=300 && reply->status_code < 400 && s->iformat) {
1537 av_strlcpy(s->filename, reply->location, sizeof(s->filename));
1538 av_log(s, AV_LOG_INFO, "Status %d: Redirecting to %s\n",
1548 #if CONFIG_RTSP_DEMUXER
1549 static int rtsp_read_header(AVFormatContext *s,
1550 AVFormatParameters *ap)
1552 RTSPState *rt = s->priv_data;
1555 ret = ff_rtsp_connect(s);
1559 if (ap->initial_pause) {
1560 /* do not start immediately */
1562 if (rtsp_read_play(s) < 0) {
1563 ff_rtsp_close_streams(s);
1564 url_close(rt->rtsp_hd);
1565 return AVERROR_INVALIDDATA;
1572 static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1573 uint8_t *buf, int buf_size)
1575 RTSPState *rt = s->priv_data;
1576 RTSPStream *rtsp_st;
1578 int fd, fd_max, n, i, ret, tcp_fd;
1582 if (url_interrupt_cb())
1583 return AVERROR(EINTR);
1586 tcp_fd = fd_max = url_get_file_handle(rt->rtsp_hd);
1587 FD_SET(tcp_fd, &rfds);
1592 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1593 rtsp_st = rt->rtsp_streams[i];
1594 if (rtsp_st->rtp_handle) {
1595 /* currently, we cannot probe RTCP handle because of
1596 * blocking restrictions */
1597 fd = url_get_file_handle(rtsp_st->rtp_handle);
1604 tv.tv_usec = 100 * 1000;
1605 n = select(fd_max + 1, &rfds, NULL, NULL, &tv);
1607 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1608 rtsp_st = rt->rtsp_streams[i];
1609 if (rtsp_st->rtp_handle) {
1610 fd = url_get_file_handle(rtsp_st->rtp_handle);
1611 if (FD_ISSET(fd, &rfds)) {
1612 ret = url_read(rtsp_st->rtp_handle, buf, buf_size);
1614 *prtsp_st = rtsp_st;
1620 #if CONFIG_RTSP_DEMUXER
1621 if (tcp_fd != -1 && FD_ISSET(tcp_fd, &rfds)) {
1622 RTSPMessageHeader reply;
1624 ff_rtsp_read_reply(s, &reply, NULL, 0);
1625 /* XXX: parse message */
1626 if (rt->state != RTSP_STATE_STREAMING)
1634 static int tcp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1635 uint8_t *buf, int buf_size)
1637 RTSPState *rt = s->priv_data;
1638 int id, len, i, ret;
1639 RTSPStream *rtsp_st;
1641 #ifdef DEBUG_RTP_TCP
1642 dprintf(s, "tcp_read_packet:\n");
1646 RTSPMessageHeader reply;
1648 ret = ff_rtsp_read_reply(s, &reply, NULL, 1);
1651 if (ret == 1) /* received '$' */
1653 /* XXX: parse message */
1654 if (rt->state != RTSP_STATE_STREAMING)
1657 ret = url_read_complete(rt->rtsp_hd, buf, 3);
1661 len = AV_RB16(buf + 1);
1662 #ifdef DEBUG_RTP_TCP
1663 dprintf(s, "id=%d len=%d\n", id, len);
1665 if (len > buf_size || len < 12)
1668 ret = url_read_complete(rt->rtsp_hd, buf, len);
1671 if (rt->transport == RTSP_TRANSPORT_RDT &&
1672 ff_rdt_parse_header(buf, len, &id, NULL, NULL, NULL, NULL) < 0)
1675 /* find the matching stream */
1676 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1677 rtsp_st = rt->rtsp_streams[i];
1678 if (id >= rtsp_st->interleaved_min &&
1679 id <= rtsp_st->interleaved_max)
1684 *prtsp_st = rtsp_st;
1688 static int rtsp_fetch_packet(AVFormatContext *s, AVPacket *pkt)
1690 RTSPState *rt = s->priv_data;
1692 uint8_t buf[10 * RTP_MAX_PACKET_LENGTH];
1693 RTSPStream *rtsp_st;
1695 /* get next frames from the same RTP packet */
1696 if (rt->cur_transport_priv) {
1697 if (rt->transport == RTSP_TRANSPORT_RDT) {
1698 ret = ff_rdt_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
1700 ret = rtp_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
1702 rt->cur_transport_priv = NULL;
1704 } else if (ret == 1) {
1707 rt->cur_transport_priv = NULL;
1710 /* read next RTP packet */
1712 switch(rt->lower_transport) {
1714 #if CONFIG_RTSP_DEMUXER
1715 case RTSP_LOWER_TRANSPORT_TCP:
1716 len = tcp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1719 case RTSP_LOWER_TRANSPORT_UDP:
1720 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
1721 len = udp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1722 if (len >=0 && rtsp_st->transport_priv && rt->transport == RTSP_TRANSPORT_RTP)
1723 rtp_check_and_send_back_rr(rtsp_st->transport_priv, len);
1730 if (rt->transport == RTSP_TRANSPORT_RDT) {
1731 ret = ff_rdt_parse_packet(rtsp_st->transport_priv, pkt, buf, len);
1733 ret = rtp_parse_packet(rtsp_st->transport_priv, pkt, buf, len);
1737 /* more packets may follow, so we save the RTP context */
1738 rt->cur_transport_priv = rtsp_st->transport_priv;
1743 static int rtsp_read_packet(AVFormatContext *s, AVPacket *pkt)
1745 RTSPState *rt = s->priv_data;
1747 RTSPMessageHeader reply1, *reply = &reply1;
1750 if (rt->server_type == RTSP_SERVER_REAL) {
1752 enum AVDiscard cache[MAX_STREAMS];
1754 for (i = 0; i < s->nb_streams; i++)
1755 cache[i] = s->streams[i]->discard;
1757 if (!rt->need_subscription) {
1758 if (memcmp (cache, rt->real_setup_cache,
1759 sizeof(enum AVDiscard) * s->nb_streams)) {
1760 snprintf(cmd, sizeof(cmd),
1761 "SET_PARAMETER %s RTSP/1.0\r\n"
1762 "Unsubscribe: %s\r\n",
1763 rt->control_uri, rt->last_subscription);
1764 ff_rtsp_send_cmd(s, cmd, reply, NULL);
1765 if (reply->status_code != RTSP_STATUS_OK)
1766 return AVERROR_INVALIDDATA;
1767 rt->need_subscription = 1;
1771 if (rt->need_subscription) {
1772 int r, rule_nr, first = 1;
1774 memcpy(rt->real_setup_cache, cache,
1775 sizeof(enum AVDiscard) * s->nb_streams);
1776 rt->last_subscription[0] = 0;
1778 snprintf(cmd, sizeof(cmd),
1779 "SET_PARAMETER %s RTSP/1.0\r\n"
1782 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1784 for (r = 0; r < s->nb_streams; r++) {
1785 if (s->streams[r]->priv_data == rt->rtsp_streams[i]) {
1786 if (s->streams[r]->discard != AVDISCARD_ALL) {
1788 av_strlcat(rt->last_subscription, ",",
1789 sizeof(rt->last_subscription));
1790 ff_rdt_subscribe_rule(
1791 rt->last_subscription,
1792 sizeof(rt->last_subscription), i, rule_nr);
1799 av_strlcatf(cmd, sizeof(cmd), "%s\r\n", rt->last_subscription);
1800 ff_rtsp_send_cmd(s, cmd, reply, NULL);
1801 if (reply->status_code != RTSP_STATUS_OK)
1802 return AVERROR_INVALIDDATA;
1803 rt->need_subscription = 0;
1805 if (rt->state == RTSP_STATE_STREAMING)
1810 ret = rtsp_fetch_packet(s, pkt);
1814 /* send dummy request to keep TCP connection alive */
1815 if ((rt->server_type == RTSP_SERVER_WMS ||
1816 rt->server_type == RTSP_SERVER_REAL) &&
1817 (av_gettime() - rt->last_cmd_time) / 1000000 >= rt->timeout / 2) {
1818 if (rt->server_type == RTSP_SERVER_WMS) {
1819 snprintf(cmd, sizeof(cmd) - 1,
1820 "GET_PARAMETER %s RTSP/1.0\r\n",
1822 ff_rtsp_send_cmd_async(s, cmd);
1824 ff_rtsp_send_cmd_async(s, "OPTIONS * RTSP/1.0\r\n");
1831 /* pause the stream */
1832 static int rtsp_read_pause(AVFormatContext *s)
1834 RTSPState *rt = s->priv_data;
1835 RTSPMessageHeader reply1, *reply = &reply1;
1840 if (rt->state != RTSP_STATE_STREAMING)
1842 else if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) {
1843 snprintf(cmd, sizeof(cmd),
1844 "PAUSE %s RTSP/1.0\r\n",
1846 ff_rtsp_send_cmd(s, cmd, reply, NULL);
1847 if (reply->status_code != RTSP_STATUS_OK) {
1851 rt->state = RTSP_STATE_PAUSED;
1855 static int rtsp_read_seek(AVFormatContext *s, int stream_index,
1856 int64_t timestamp, int flags)
1858 RTSPState *rt = s->priv_data;
1860 rt->seek_timestamp = av_rescale_q(timestamp,
1861 s->streams[stream_index]->time_base,
1865 case RTSP_STATE_IDLE:
1867 case RTSP_STATE_STREAMING:
1868 if (rtsp_read_pause(s) != 0)
1870 rt->state = RTSP_STATE_SEEKING;
1871 if (rtsp_read_play(s) != 0)
1874 case RTSP_STATE_PAUSED:
1875 rt->state = RTSP_STATE_IDLE;
1881 static int rtsp_read_close(AVFormatContext *s)
1883 RTSPState *rt = s->priv_data;
1887 /* NOTE: it is valid to flush the buffer here */
1888 if (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
1889 url_fclose(&rt->rtsp_gb);
1892 snprintf(cmd, sizeof(cmd),
1893 "TEARDOWN %s RTSP/1.0\r\n",
1895 ff_rtsp_send_cmd_async(s, cmd);
1897 ff_rtsp_close_streams(s);
1898 url_close(rt->rtsp_hd);
1903 AVInputFormat rtsp_demuxer = {
1905 NULL_IF_CONFIG_SMALL("RTSP input format"),
1912 .flags = AVFMT_NOFILE,
1913 .read_play = rtsp_read_play,
1914 .read_pause = rtsp_read_pause,
1918 static int sdp_probe(AVProbeData *p1)
1920 const char *p = p1->buf, *p_end = p1->buf + p1->buf_size;
1922 /* we look for a line beginning "c=IN IP4" */
1923 while (p < p_end && *p != '\0') {
1924 if (p + sizeof("c=IN IP4") - 1 < p_end &&
1925 av_strstart(p, "c=IN IP4", NULL))
1926 return AVPROBE_SCORE_MAX / 2;
1928 while (p < p_end - 1 && *p != '\n') p++;
1937 #define SDP_MAX_SIZE 8192
1939 static int sdp_read_header(AVFormatContext *s, AVFormatParameters *ap)
1941 RTSPState *rt = s->priv_data;
1942 RTSPStream *rtsp_st;
1947 if (!ff_network_init())
1948 return AVERROR(EIO);
1950 /* read the whole sdp file */
1951 /* XXX: better loading */
1952 content = av_malloc(SDP_MAX_SIZE);
1953 size = get_buffer(s->pb, content, SDP_MAX_SIZE - 1);
1956 return AVERROR_INVALIDDATA;
1958 content[size] ='\0';
1960 sdp_parse(s, content);
1963 /* open each RTP stream */
1964 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1965 rtsp_st = rt->rtsp_streams[i];
1967 ff_url_join(url, sizeof(url), "rtp", NULL,
1968 inet_ntoa(rtsp_st->sdp_ip), rtsp_st->sdp_port,
1969 "?localport=%d&ttl=%d", rtsp_st->sdp_port,
1971 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1972 err = AVERROR_INVALIDDATA;
1975 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
1980 ff_rtsp_close_streams(s);
1985 static int sdp_read_close(AVFormatContext *s)
1987 ff_rtsp_close_streams(s);
1992 AVInputFormat sdp_demuxer = {
1994 NULL_IF_CONFIG_SMALL("SDP"),