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 /* needed by inet_aton() */
25 #include "libavutil/base64.h"
26 #include "libavutil/avstring.h"
27 #include "libavutil/intreadwrite.h"
32 #include <sys/select.h>
41 #include "rtp_vorbis.h"
44 //#define DEBUG_RTP_TCP
46 #if LIBAVFORMAT_VERSION_INT < (53 << 16)
47 int rtsp_default_protocols = (1 << RTSP_LOWER_TRANSPORT_UDP);
50 #define SPACE_CHARS " \t\r\n"
51 /* we use memchr() instead of strchr() here because strchr() will return
52 * the terminating '\0' of SPACE_CHARS instead of NULL if c is '\0'. */
53 #define redir_isspace(c) memchr(SPACE_CHARS, c, 4)
54 static void skip_spaces(const char **pp)
58 while (redir_isspace(*p))
63 static void get_word_until_chars(char *buf, int buf_size,
64 const char *sep, const char **pp)
72 while (!strchr(sep, *p) && *p != '\0') {
73 if ((q - buf) < buf_size - 1)
82 static void get_word_sep(char *buf, int buf_size, const char *sep,
85 if (**pp == '/') (*pp)++;
86 get_word_until_chars(buf, buf_size, sep, pp);
89 static void get_word(char *buf, int buf_size, const char **pp)
91 get_word_until_chars(buf, buf_size, SPACE_CHARS, pp);
94 /* parse the rtpmap description: <codec_name>/<clock_rate>[/<other params>] */
95 static int sdp_parse_rtpmap(AVFormatContext *s,
96 AVCodecContext *codec, RTSPStream *rtsp_st,
97 int payload_type, const char *p)
104 /* Loop into AVRtpDynamicPayloadTypes[] and AVRtpPayloadTypes[] and
105 * see if we can handle this kind of payload.
106 * The space should normally not be there but some Real streams or
107 * particular servers ("RealServer Version 6.1.3.970", see issue 1658)
108 * have a trailing space. */
109 get_word_sep(buf, sizeof(buf), "/ ", &p);
110 if (payload_type >= RTP_PT_PRIVATE) {
111 RTPDynamicProtocolHandler *handler;
112 for (handler = RTPFirstDynamicPayloadHandler;
113 handler; handler = handler->next) {
114 if (!strcasecmp(buf, handler->enc_name) &&
115 codec->codec_type == handler->codec_type) {
116 codec->codec_id = handler->codec_id;
117 rtsp_st->dynamic_handler = handler;
119 rtsp_st->dynamic_protocol_context = handler->open();
124 /* We are in a standard case
125 * (from http://www.iana.org/assignments/rtp-parameters). */
126 /* search into AVRtpPayloadTypes[] */
127 codec->codec_id = ff_rtp_codec_id(buf, codec->codec_type);
130 c = avcodec_find_decoder(codec->codec_id);
136 get_word_sep(buf, sizeof(buf), "/", &p);
138 switch (codec->codec_type) {
139 case CODEC_TYPE_AUDIO:
140 av_log(s, AV_LOG_DEBUG, "audio codec set to: %s\n", c_name);
141 codec->sample_rate = RTSP_DEFAULT_AUDIO_SAMPLERATE;
142 codec->channels = RTSP_DEFAULT_NB_AUDIO_CHANNELS;
144 codec->sample_rate = i;
145 get_word_sep(buf, sizeof(buf), "/", &p);
149 // TODO: there is a bug here; if it is a mono stream, and
150 // less than 22000Hz, faad upconverts to stereo and twice
151 // the frequency. No problem, but the sample rate is being
152 // set here by the sdp line. Patch on its way. (rdm)
154 av_log(s, AV_LOG_DEBUG, "audio samplerate set to: %i\n",
156 av_log(s, AV_LOG_DEBUG, "audio channels set to: %i\n",
159 case CODEC_TYPE_VIDEO:
160 av_log(s, AV_LOG_DEBUG, "video codec set to: %s\n", c_name);
168 /* return the length and optionally the data */
169 static int hex_to_data(uint8_t *data, const char *p)
179 c = toupper((unsigned char) *p++);
180 if (c >= '0' && c <= '9')
182 else if (c >= 'A' && c <= 'F')
197 static void sdp_parse_fmtp_config(AVCodecContext * codec, void *ctx,
198 char *attr, char *value)
200 switch (codec->codec_id) {
203 if (!strcmp(attr, "config")) {
204 /* decode the hexa encoded parameter */
205 int len = hex_to_data(NULL, value);
206 if (codec->extradata)
207 av_free(codec->extradata);
208 codec->extradata = av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE);
209 if (!codec->extradata)
211 codec->extradata_size = len;
212 hex_to_data(codec->extradata, value);
215 case CODEC_ID_VORBIS:
216 ff_vorbis_parse_fmtp_config(codec, ctx, attr, value);
230 /* All known fmtp parmeters and the corresping RTPAttrTypeEnum */
231 #define ATTR_NAME_TYPE_INT 0
232 #define ATTR_NAME_TYPE_STR 1
233 static const AttrNameMap attr_names[]=
235 { "SizeLength", ATTR_NAME_TYPE_INT,
236 offsetof(RTPPayloadData, sizelength) },
237 { "IndexLength", ATTR_NAME_TYPE_INT,
238 offsetof(RTPPayloadData, indexlength) },
239 { "IndexDeltaLength", ATTR_NAME_TYPE_INT,
240 offsetof(RTPPayloadData, indexdeltalength) },
241 { "profile-level-id", ATTR_NAME_TYPE_INT,
242 offsetof(RTPPayloadData, profile_level_id) },
243 { "StreamType", ATTR_NAME_TYPE_INT,
244 offsetof(RTPPayloadData, streamtype) },
245 { "mode", ATTR_NAME_TYPE_STR,
246 offsetof(RTPPayloadData, mode) },
250 /* parse the attribute line from the fmtp a line of an sdp resonse. This
251 * is broken out as a function because it is used in rtp_h264.c, which is
253 int rtsp_next_attr_and_value(const char **p, char *attr, int attr_size,
254 char *value, int value_size)
258 get_word_sep(attr, attr_size, "=", p);
261 get_word_sep(value, value_size, ";", p);
269 /* parse a SDP line and save stream attributes */
270 static void sdp_parse_fmtp(AVStream *st, const char *p)
273 /* Vorbis setup headers can be up to 12KB and are sent base64
274 * encoded, giving a 12KB * (4/3) = 16KB FMTP line. */
277 RTSPStream *rtsp_st = st->priv_data;
278 AVCodecContext *codec = st->codec;
279 RTPPayloadData *rtp_payload_data = &rtsp_st->rtp_payload_data;
281 /* loop on each attribute */
282 while (rtsp_next_attr_and_value(&p, attr, sizeof(attr),
283 value, sizeof(value))) {
284 /* grab the codec extra_data from the config parameter of the fmtp
286 sdp_parse_fmtp_config(codec, rtsp_st->dynamic_protocol_context,
288 /* Looking for a known attribute */
289 for (i = 0; attr_names[i].str; ++i) {
290 if (!strcasecmp(attr, attr_names[i].str)) {
291 if (attr_names[i].type == ATTR_NAME_TYPE_INT) {
292 *(int *)((char *)rtp_payload_data +
293 attr_names[i].offset) = atoi(value);
294 } else if (attr_names[i].type == ATTR_NAME_TYPE_STR)
295 *(char **)((char *)rtp_payload_data +
296 attr_names[i].offset) = av_strdup(value);
302 /** Parse a string p in the form of Range:npt=xx-xx, and determine the start
304 * Used for seeking in the rtp stream.
306 static void rtsp_parse_range_npt(const char *p, int64_t *start, int64_t *end)
311 if (!av_stristart(p, "npt=", &p))
314 *start = AV_NOPTS_VALUE;
315 *end = AV_NOPTS_VALUE;
317 get_word_sep(buf, sizeof(buf), "-", &p);
318 *start = parse_date(buf, 1);
321 get_word_sep(buf, sizeof(buf), "-", &p);
322 *end = parse_date(buf, 1);
324 // av_log(NULL, AV_LOG_DEBUG, "Range Start: %lld\n", *start);
325 // av_log(NULL, AV_LOG_DEBUG, "Range End: %lld\n", *end);
328 typedef struct SDPParseState {
330 struct in_addr default_ip;
332 int skip_media; ///< set if an unknown m= line occurs
335 static void sdp_parse_line(AVFormatContext *s, SDPParseState *s1,
336 int letter, const char *buf)
338 RTSPState *rt = s->priv_data;
339 char buf1[64], st_type[64];
341 enum CodecType codec_type;
345 struct in_addr sdp_ip;
348 dprintf(s, "sdp: %c='%s'\n", letter, buf);
351 if (s1->skip_media && letter != 'm')
355 get_word(buf1, sizeof(buf1), &p);
356 if (strcmp(buf1, "IN") != 0)
358 get_word(buf1, sizeof(buf1), &p);
359 if (strcmp(buf1, "IP4") != 0)
361 get_word_sep(buf1, sizeof(buf1), "/", &p);
362 if (inet_aton(buf1, &sdp_ip) == 0)
367 get_word_sep(buf1, sizeof(buf1), "/", &p);
370 if (s->nb_streams == 0) {
371 s1->default_ip = sdp_ip;
372 s1->default_ttl = ttl;
374 st = s->streams[s->nb_streams - 1];
375 rtsp_st = st->priv_data;
376 rtsp_st->sdp_ip = sdp_ip;
377 rtsp_st->sdp_ttl = ttl;
381 av_metadata_set(&s->metadata, "title", p);
384 if (s->nb_streams == 0) {
385 av_metadata_set(&s->metadata, "comment", p);
392 get_word(st_type, sizeof(st_type), &p);
393 if (!strcmp(st_type, "audio")) {
394 codec_type = CODEC_TYPE_AUDIO;
395 } else if (!strcmp(st_type, "video")) {
396 codec_type = CODEC_TYPE_VIDEO;
397 } else if (!strcmp(st_type, "application")) {
398 codec_type = CODEC_TYPE_DATA;
403 rtsp_st = av_mallocz(sizeof(RTSPStream));
406 rtsp_st->stream_index = -1;
407 dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st);
409 rtsp_st->sdp_ip = s1->default_ip;
410 rtsp_st->sdp_ttl = s1->default_ttl;
412 get_word(buf1, sizeof(buf1), &p); /* port */
413 rtsp_st->sdp_port = atoi(buf1);
415 get_word(buf1, sizeof(buf1), &p); /* protocol (ignored) */
417 /* XXX: handle list of formats */
418 get_word(buf1, sizeof(buf1), &p); /* format list */
419 rtsp_st->sdp_payload_type = atoi(buf1);
421 if (!strcmp(ff_rtp_enc_name(rtsp_st->sdp_payload_type), "MP2T")) {
422 /* no corresponding stream */
424 st = av_new_stream(s, 0);
427 st->priv_data = rtsp_st;
428 rtsp_st->stream_index = st->index;
429 st->codec->codec_type = codec_type;
430 if (rtsp_st->sdp_payload_type < RTP_PT_PRIVATE) {
431 /* if standard payload type, we can find the codec right now */
432 ff_rtp_get_codec_info(st->codec, rtsp_st->sdp_payload_type);
435 /* put a default control url */
436 av_strlcpy(rtsp_st->control_url, rt->control_uri,
437 sizeof(rtsp_st->control_url));
440 if (av_strstart(p, "control:", &p)) {
441 if (s->nb_streams == 0) {
442 if (!strncmp(p, "rtsp://", 7))
443 av_strlcpy(rt->control_uri, p,
444 sizeof(rt->control_uri));
447 /* get the control url */
448 st = s->streams[s->nb_streams - 1];
449 rtsp_st = st->priv_data;
451 /* XXX: may need to add full url resolution */
452 url_split(proto, sizeof(proto), NULL, 0, NULL, 0,
454 if (proto[0] == '\0') {
455 /* relative control URL */
456 if (rtsp_st->control_url[strlen(rtsp_st->control_url)-1]!='/')
457 av_strlcat(rtsp_st->control_url, "/",
458 sizeof(rtsp_st->control_url));
459 av_strlcat(rtsp_st->control_url, p,
460 sizeof(rtsp_st->control_url));
462 av_strlcpy(rtsp_st->control_url, p,
463 sizeof(rtsp_st->control_url));
465 } else if (av_strstart(p, "rtpmap:", &p) && s->nb_streams > 0) {
466 /* NOTE: rtpmap is only supported AFTER the 'm=' tag */
467 get_word(buf1, sizeof(buf1), &p);
468 payload_type = atoi(buf1);
469 st = s->streams[s->nb_streams - 1];
470 rtsp_st = st->priv_data;
471 sdp_parse_rtpmap(s, st->codec, rtsp_st, payload_type, p);
472 } else if (av_strstart(p, "fmtp:", &p)) {
473 /* NOTE: fmtp is only supported AFTER the 'a=rtpmap:xxx' tag */
474 get_word(buf1, sizeof(buf1), &p);
475 payload_type = atoi(buf1);
476 for (i = 0; i < s->nb_streams; i++) {
478 rtsp_st = st->priv_data;
479 if (rtsp_st->sdp_payload_type == payload_type) {
480 if (!(rtsp_st->dynamic_handler &&
481 rtsp_st->dynamic_handler->parse_sdp_a_line &&
482 rtsp_st->dynamic_handler->parse_sdp_a_line(s,
483 i, rtsp_st->dynamic_protocol_context, buf)))
484 sdp_parse_fmtp(st, p);
487 } else if (av_strstart(p, "framesize:", &p)) {
488 // let dynamic protocol handlers have a stab at the line.
489 get_word(buf1, sizeof(buf1), &p);
490 payload_type = atoi(buf1);
491 for (i = 0; i < s->nb_streams; i++) {
493 rtsp_st = st->priv_data;
494 if (rtsp_st->sdp_payload_type == payload_type &&
495 rtsp_st->dynamic_handler &&
496 rtsp_st->dynamic_handler->parse_sdp_a_line)
497 rtsp_st->dynamic_handler->parse_sdp_a_line(s, i,
498 rtsp_st->dynamic_protocol_context, buf);
500 } else if (av_strstart(p, "range:", &p)) {
503 // this is so that seeking on a streamed file can work.
504 rtsp_parse_range_npt(p, &start, &end);
505 s->start_time = start;
506 /* AV_NOPTS_VALUE means live broadcast (and can't seek) */
507 s->duration = (end == AV_NOPTS_VALUE) ?
508 AV_NOPTS_VALUE : end - start;
509 } else if (av_strstart(p, "IsRealDataType:integer;",&p)) {
511 rt->transport = RTSP_TRANSPORT_RDT;
513 if (rt->server_type == RTSP_SERVER_WMS)
514 ff_wms_parse_sdp_a_line(s, p);
515 if (s->nb_streams > 0) {
516 if (rt->server_type == RTSP_SERVER_REAL)
517 ff_real_parse_sdp_a_line(s, s->nb_streams - 1, p);
519 rtsp_st = s->streams[s->nb_streams - 1]->priv_data;
520 if (rtsp_st->dynamic_handler &&
521 rtsp_st->dynamic_handler->parse_sdp_a_line)
522 rtsp_st->dynamic_handler->parse_sdp_a_line(s,
524 rtsp_st->dynamic_protocol_context, buf);
531 static int sdp_parse(AVFormatContext *s, const char *content)
535 /* Some SDP lines, particularly for Realmedia or ASF RTSP streams,
536 * contain long SDP lines containing complete ASF Headers (several
537 * kB) or arrays of MDPR (RM stream descriptor) headers plus
538 * "rulebooks" describing their properties. Therefore, the SDP line
541 * The Vorbis FMTP line can be up to 16KB - see sdp_parse_fmtp. */
543 SDPParseState sdp_parse_state, *s1 = &sdp_parse_state;
545 memset(s1, 0, sizeof(SDPParseState));
556 /* get the content */
558 while (*p != '\n' && *p != '\r' && *p != '\0') {
559 if ((q - buf) < sizeof(buf) - 1)
564 sdp_parse_line(s, s1, letter, buf);
566 while (*p != '\n' && *p != '\0')
574 /* close and free RTSP streams */
575 static void rtsp_close_streams(AVFormatContext *s)
577 RTSPState *rt = s->priv_data;
581 for (i = 0; i < rt->nb_rtsp_streams; i++) {
582 rtsp_st = rt->rtsp_streams[i];
584 if (rtsp_st->transport_priv) {
585 if (rt->transport == RTSP_TRANSPORT_RDT)
586 ff_rdt_parse_close(rtsp_st->transport_priv);
588 rtp_parse_close(rtsp_st->transport_priv);
590 if (rtsp_st->rtp_handle)
591 url_close(rtsp_st->rtp_handle);
592 if (rtsp_st->dynamic_handler && rtsp_st->dynamic_protocol_context)
593 rtsp_st->dynamic_handler->close(
594 rtsp_st->dynamic_protocol_context);
597 av_free(rt->rtsp_streams);
599 av_close_input_stream (rt->asf_ctx);
602 av_freep(&rt->auth_b64);
605 static int rtsp_open_transport_ctx(AVFormatContext *s, RTSPStream *rtsp_st)
607 RTSPState *rt = s->priv_data;
610 /* open the RTP context */
611 if (rtsp_st->stream_index >= 0)
612 st = s->streams[rtsp_st->stream_index];
614 s->ctx_flags |= AVFMTCTX_NOHEADER;
616 if (rt->transport == RTSP_TRANSPORT_RDT)
617 rtsp_st->transport_priv = ff_rdt_parse_open(s, st->index,
618 rtsp_st->dynamic_protocol_context,
619 rtsp_st->dynamic_handler);
621 rtsp_st->transport_priv = rtp_parse_open(s, st, rtsp_st->rtp_handle,
622 rtsp_st->sdp_payload_type,
623 &rtsp_st->rtp_payload_data);
625 if (!rtsp_st->transport_priv) {
626 return AVERROR(ENOMEM);
627 } else if (rt->transport != RTSP_TRANSPORT_RDT) {
628 if (rtsp_st->dynamic_handler) {
629 rtp_parse_set_dynamic_protocol(rtsp_st->transport_priv,
630 rtsp_st->dynamic_protocol_context,
631 rtsp_st->dynamic_handler);
638 #if CONFIG_RTSP_DEMUXER
639 static int rtsp_probe(AVProbeData *p)
641 if (av_strstart(p->filename, "rtsp:", NULL))
642 return AVPROBE_SCORE_MAX;
646 static void rtsp_parse_range(int *min_ptr, int *max_ptr, const char **pp)
653 v = strtol(p, (char **)&p, 10);
657 v = strtol(p, (char **)&p, 10);
666 /* XXX: only one transport specification is parsed */
667 static void rtsp_parse_transport(RTSPMessageHeader *reply, const char *p)
669 char transport_protocol[16];
671 char lower_transport[16];
673 RTSPTransportField *th;
676 reply->nb_transports = 0;
683 th = &reply->transports[reply->nb_transports];
685 get_word_sep(transport_protocol, sizeof(transport_protocol),
687 if (!strcasecmp (transport_protocol, "rtp")) {
688 get_word_sep(profile, sizeof(profile), "/;,", &p);
689 lower_transport[0] = '\0';
690 /* rtp/avp/<protocol> */
692 get_word_sep(lower_transport, sizeof(lower_transport),
695 th->transport = RTSP_TRANSPORT_RTP;
696 } else if (!strcasecmp (transport_protocol, "x-pn-tng") ||
697 !strcasecmp (transport_protocol, "x-real-rdt")) {
698 /* x-pn-tng/<protocol> */
699 get_word_sep(lower_transport, sizeof(lower_transport), "/;,", &p);
701 th->transport = RTSP_TRANSPORT_RDT;
703 if (!strcasecmp(lower_transport, "TCP"))
704 th->lower_transport = RTSP_LOWER_TRANSPORT_TCP;
706 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP;
710 /* get each parameter */
711 while (*p != '\0' && *p != ',') {
712 get_word_sep(parameter, sizeof(parameter), "=;,", &p);
713 if (!strcmp(parameter, "port")) {
716 rtsp_parse_range(&th->port_min, &th->port_max, &p);
718 } else if (!strcmp(parameter, "client_port")) {
721 rtsp_parse_range(&th->client_port_min,
722 &th->client_port_max, &p);
724 } else if (!strcmp(parameter, "server_port")) {
727 rtsp_parse_range(&th->server_port_min,
728 &th->server_port_max, &p);
730 } else if (!strcmp(parameter, "interleaved")) {
733 rtsp_parse_range(&th->interleaved_min,
734 &th->interleaved_max, &p);
736 } else if (!strcmp(parameter, "multicast")) {
737 if (th->lower_transport == RTSP_LOWER_TRANSPORT_UDP)
738 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP_MULTICAST;
739 } else if (!strcmp(parameter, "ttl")) {
742 th->ttl = strtol(p, (char **)&p, 10);
744 } else if (!strcmp(parameter, "destination")) {
745 struct in_addr ipaddr;
749 get_word_sep(buf, sizeof(buf), ";,", &p);
750 if (inet_aton(buf, &ipaddr))
751 th->destination = ntohl(ipaddr.s_addr);
754 while (*p != ';' && *p != '\0' && *p != ',')
762 reply->nb_transports++;
766 void rtsp_parse_line(RTSPMessageHeader *reply, const char *buf)
770 /* NOTE: we do case independent match for broken servers */
772 if (av_stristart(p, "Session:", &p)) {
774 get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p);
775 if (av_stristart(p, ";timeout=", &p) &&
776 (t = strtol(p, NULL, 10)) > 0) {
779 } else if (av_stristart(p, "Content-Length:", &p)) {
780 reply->content_length = strtol(p, NULL, 10);
781 } else if (av_stristart(p, "Transport:", &p)) {
782 rtsp_parse_transport(reply, p);
783 } else if (av_stristart(p, "CSeq:", &p)) {
784 reply->seq = strtol(p, NULL, 10);
785 } else if (av_stristart(p, "Range:", &p)) {
786 rtsp_parse_range_npt(p, &reply->range_start, &reply->range_end);
787 } else if (av_stristart(p, "RealChallenge1:", &p)) {
789 av_strlcpy(reply->real_challenge, p, sizeof(reply->real_challenge));
790 } else if (av_stristart(p, "Server:", &p)) {
792 av_strlcpy(reply->server, p, sizeof(reply->server));
793 } else if (av_stristart(p, "Notice:", &p) ||
794 av_stristart(p, "X-Notice:", &p)) {
795 reply->notice = strtol(p, NULL, 10);
796 } else if (av_stristart(p, "Location:", &p)) {
798 av_strlcpy(reply->location, p , sizeof(reply->location));
802 /* skip a RTP/TCP interleaved packet */
803 static void rtsp_skip_packet(AVFormatContext *s)
805 RTSPState *rt = s->priv_data;
809 ret = url_read_complete(rt->rtsp_hd, buf, 3);
812 len = AV_RB16(buf + 1);
814 dprintf(s, "skipping RTP packet len=%d\n", len);
819 if (len1 > sizeof(buf))
821 ret = url_read_complete(rt->rtsp_hd, buf, len1);
829 * Read a RTSP message from the server, or prepare to read data
830 * packets if we're reading data interleaved over the TCP/RTSP
831 * connection as well.
833 * @param s RTSP demuxer context
834 * @param reply pointer where the RTSP message header will be stored
835 * @param content_ptr pointer where the RTSP message body, if any, will
836 * be stored (length is in reply)
837 * @param return_on_interleaved_data whether the function may return if we
838 * encounter a data marker ('$'), which precedes data
839 * packets over interleaved TCP/RTSP connections. If this
840 * is set, this function will return 1 after encountering
841 * a '$'. If it is not set, the function will skip any
842 * data packets (if they are encountered), until a reply
843 * has been fully parsed. If no more data is available
844 * without parsing a reply, it will return an error.
846 * @returns 1 if a data packets is ready to be received, -1 on error,
849 static int rtsp_read_reply(AVFormatContext *s, RTSPMessageHeader *reply,
850 unsigned char **content_ptr,
851 int return_on_interleaved_data)
853 RTSPState *rt = s->priv_data;
854 char buf[4096], buf1[1024], *q;
857 int ret, content_length, line_count = 0;
858 unsigned char *content = NULL;
860 memset(reply, 0, sizeof(*reply));
862 /* parse reply (XXX: use buffers) */
863 rt->last_reply[0] = '\0';
867 ret = url_read_complete(rt->rtsp_hd, &ch, 1);
869 dprintf(s, "ret=%d c=%02x [%c]\n", ret, ch, ch);
876 /* XXX: only parse it if first char on line ? */
877 if (return_on_interleaved_data) {
881 } else if (ch != '\r') {
882 if ((q - buf) < sizeof(buf) - 1)
888 dprintf(s, "line='%s'\n", buf);
890 /* test if last line */
894 if (line_count == 0) {
896 get_word(buf1, sizeof(buf1), &p);
897 get_word(buf1, sizeof(buf1), &p);
898 reply->status_code = atoi(buf1);
900 rtsp_parse_line(reply, p);
901 av_strlcat(rt->last_reply, p, sizeof(rt->last_reply));
902 av_strlcat(rt->last_reply, "\n", sizeof(rt->last_reply));
907 if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0')
908 av_strlcpy(rt->session_id, reply->session_id, sizeof(rt->session_id));
910 content_length = reply->content_length;
911 if (content_length > 0) {
912 /* leave some room for a trailing '\0' (useful for simple parsing) */
913 content = av_malloc(content_length + 1);
914 (void)url_read_complete(rt->rtsp_hd, content, content_length);
915 content[content_length] = '\0';
918 *content_ptr = content;
923 if (reply->notice == 2101 /* End-of-Stream Reached */ ||
924 reply->notice == 2104 /* Start-of-Stream Reached */ ||
925 reply->notice == 2306 /* Continuous Feed Terminated */) {
926 rt->state = RTSP_STATE_IDLE;
927 } else if (reply->notice >= 4400 && reply->notice < 5500) {
928 return AVERROR(EIO); /* data or server error */
929 } else if (reply->notice == 2401 /* Ticket Expired */ ||
930 (reply->notice >= 5500 && reply->notice < 5600) /* end of term */ )
931 return AVERROR(EPERM);
936 static void rtsp_send_cmd_with_content_async(AVFormatContext *s,
938 const unsigned char *send_content,
939 int send_content_length)
941 RTSPState *rt = s->priv_data;
942 char buf[4096], buf1[1024];
945 av_strlcpy(buf, cmd, sizeof(buf));
946 snprintf(buf1, sizeof(buf1), "CSeq: %d\r\n", rt->seq);
947 av_strlcat(buf, buf1, sizeof(buf));
948 if (rt->session_id[0] != '\0' && !strstr(cmd, "\nIf-Match:")) {
949 snprintf(buf1, sizeof(buf1), "Session: %s\r\n", rt->session_id);
950 av_strlcat(buf, buf1, sizeof(buf));
953 av_strlcatf(buf, sizeof(buf),
954 "Authorization: Basic %s\r\n",
956 if (send_content_length > 0 && send_content)
957 av_strlcatf(buf, sizeof(buf), "Content-Length: %d\r\n", send_content_length);
958 av_strlcat(buf, "\r\n", sizeof(buf));
960 dprintf(s, "Sending:\n%s--\n", buf);
962 url_write(rt->rtsp_hd, buf, strlen(buf));
963 if (send_content_length > 0 && send_content)
964 url_write(rt->rtsp_hd, send_content, send_content_length);
965 rt->last_cmd_time = av_gettime();
968 static void rtsp_send_cmd_async(AVFormatContext *s, const char *cmd)
970 rtsp_send_cmd_with_content_async(s, cmd, NULL, 0);
973 static void rtsp_send_cmd(AVFormatContext *s,
974 const char *cmd, RTSPMessageHeader *reply,
975 unsigned char **content_ptr)
977 rtsp_send_cmd_async(s, cmd);
979 rtsp_read_reply(s, reply, content_ptr, 0);
982 static void rtsp_send_cmd_with_content(AVFormatContext *s,
984 RTSPMessageHeader *reply,
985 unsigned char **content_ptr,
986 const unsigned char *send_content,
987 int send_content_length)
989 rtsp_send_cmd_with_content_async(s, cmd, send_content, send_content_length);
991 rtsp_read_reply(s, reply, content_ptr, 0);
995 * @returns 0 on success, <0 on error, 1 if protocol is unavailable.
997 static int make_setup_request(AVFormatContext *s, const char *host, int port,
998 int lower_transport, const char *real_challenge)
1000 RTSPState *rt = s->priv_data;
1001 int rtx, j, i, err, interleave = 0;
1002 RTSPStream *rtsp_st;
1003 RTSPMessageHeader reply1, *reply = &reply1;
1005 const char *trans_pref;
1007 if (rt->transport == RTSP_TRANSPORT_RDT)
1008 trans_pref = "x-pn-tng";
1010 trans_pref = "RTP/AVP";
1012 /* default timeout: 1 minute */
1015 /* for each stream, make the setup request */
1016 /* XXX: we assume the same server is used for the control of each
1019 for (j = RTSP_RTP_PORT_MIN, i = 0; i < rt->nb_rtsp_streams; ++i) {
1020 char transport[2048];
1023 * WMS serves all UDP data over a single connection, the RTX, which
1024 * isn't necessarily the first in the SDP but has to be the first
1025 * to be set up, else the second/third SETUP will fail with a 461.
1027 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP &&
1028 rt->server_type == RTSP_SERVER_WMS) {
1031 for (rtx = 0; rtx < rt->nb_rtsp_streams; rtx++) {
1032 int len = strlen(rt->rtsp_streams[rtx]->control_url);
1034 !strcmp(rt->rtsp_streams[rtx]->control_url + len - 4,
1038 if (rtx == rt->nb_rtsp_streams)
1039 return -1; /* no RTX found */
1040 rtsp_st = rt->rtsp_streams[rtx];
1042 rtsp_st = rt->rtsp_streams[i > rtx ? i : i - 1];
1044 rtsp_st = rt->rtsp_streams[i];
1047 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP) {
1050 if (rt->server_type == RTSP_SERVER_WMS && i > 1) {
1051 port = reply->transports[0].client_port_min;
1055 /* first try in specified port range */
1056 if (RTSP_RTP_PORT_MIN != 0) {
1057 while (j <= RTSP_RTP_PORT_MAX) {
1058 snprintf(buf, sizeof(buf), "rtp://%s?localport=%d",
1060 /* we will use two ports per rtp stream (rtp and rtcp) */
1062 if (url_open(&rtsp_st->rtp_handle, buf, URL_RDWR) == 0)
1068 /* then try on any port */
1069 if (url_open(&rtsp_st->rtp_handle, "rtp://", URL_RDONLY) < 0) {
1070 err = AVERROR_INVALIDDATA;
1076 port = rtp_get_local_port(rtsp_st->rtp_handle);
1078 snprintf(transport, sizeof(transport) - 1,
1079 "%s/UDP;", trans_pref);
1080 if (rt->server_type != RTSP_SERVER_REAL)
1081 av_strlcat(transport, "unicast;", sizeof(transport));
1082 av_strlcatf(transport, sizeof(transport),
1083 "client_port=%d", port);
1084 if (rt->transport == RTSP_TRANSPORT_RTP &&
1085 !(rt->server_type == RTSP_SERVER_WMS && i > 0))
1086 av_strlcatf(transport, sizeof(transport), "-%d", port + 1);
1090 else if (lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
1091 /** For WMS streams, the application streams are only used for
1092 * UDP. When trying to set it up for TCP streams, the server
1093 * will return an error. Therefore, we skip those streams. */
1094 if (rt->server_type == RTSP_SERVER_WMS &&
1095 s->streams[rtsp_st->stream_index]->codec->codec_type ==
1098 snprintf(transport, sizeof(transport) - 1,
1099 "%s/TCP;", trans_pref);
1100 if (rt->server_type == RTSP_SERVER_WMS)
1101 av_strlcat(transport, "unicast;", sizeof(transport));
1102 av_strlcatf(transport, sizeof(transport),
1103 "interleaved=%d-%d",
1104 interleave, interleave + 1);
1108 else if (lower_transport == RTSP_LOWER_TRANSPORT_UDP_MULTICAST) {
1109 snprintf(transport, sizeof(transport) - 1,
1110 "%s/UDP;multicast", trans_pref);
1113 av_strlcat(transport, ";mode=receive", sizeof(transport));
1114 } else if (rt->server_type == RTSP_SERVER_REAL ||
1115 rt->server_type == RTSP_SERVER_WMS)
1116 av_strlcat(transport, ";mode=play", sizeof(transport));
1117 snprintf(cmd, sizeof(cmd),
1118 "SETUP %s RTSP/1.0\r\n"
1119 "Transport: %s\r\n",
1120 rtsp_st->control_url, transport);
1121 if (i == 0 && rt->server_type == RTSP_SERVER_REAL) {
1122 char real_res[41], real_csum[9];
1123 ff_rdt_calc_response_and_checksum(real_res, real_csum,
1125 av_strlcatf(cmd, sizeof(cmd),
1127 "RealChallenge2: %s, sd=%s\r\n",
1128 rt->session_id, real_res, real_csum);
1130 rtsp_send_cmd(s, cmd, reply, NULL);
1131 if (reply->status_code == 461 /* Unsupported protocol */ && i == 0) {
1134 } else if (reply->status_code != RTSP_STATUS_OK ||
1135 reply->nb_transports != 1) {
1136 err = AVERROR_INVALIDDATA;
1140 /* XXX: same protocol for all streams is required */
1142 if (reply->transports[0].lower_transport != rt->lower_transport ||
1143 reply->transports[0].transport != rt->transport) {
1144 err = AVERROR_INVALIDDATA;
1148 rt->lower_transport = reply->transports[0].lower_transport;
1149 rt->transport = reply->transports[0].transport;
1152 /* close RTP connection if not choosen */
1153 if (reply->transports[0].lower_transport != RTSP_LOWER_TRANSPORT_UDP &&
1154 (lower_transport == RTSP_LOWER_TRANSPORT_UDP)) {
1155 url_close(rtsp_st->rtp_handle);
1156 rtsp_st->rtp_handle = NULL;
1159 switch(reply->transports[0].lower_transport) {
1160 case RTSP_LOWER_TRANSPORT_TCP:
1161 rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
1162 rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
1165 case RTSP_LOWER_TRANSPORT_UDP: {
1168 /* XXX: also use address if specified */
1169 snprintf(url, sizeof(url), "rtp://%s:%d",
1170 host, reply->transports[0].server_port_min);
1171 if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) &&
1172 rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
1173 err = AVERROR_INVALIDDATA;
1176 /* Try to initialize the connection state in a
1177 * potential NAT router by sending dummy packets.
1178 * RTP/RTCP dummy packets are used for RDT, too.
1180 if (!(rt->server_type == RTSP_SERVER_WMS && i > 1))
1181 rtp_send_punch_packets(rtsp_st->rtp_handle);
1184 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST: {
1189 if (reply->transports[0].destination) {
1190 in.s_addr = htonl(reply->transports[0].destination);
1191 port = reply->transports[0].port_min;
1192 ttl = reply->transports[0].ttl;
1194 in = rtsp_st->sdp_ip;
1195 port = rtsp_st->sdp_port;
1196 ttl = rtsp_st->sdp_ttl;
1198 snprintf(url, sizeof(url), "rtp://%s:%d?ttl=%d",
1199 inet_ntoa(in), port, ttl);
1200 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1201 err = AVERROR_INVALIDDATA;
1208 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
1212 if (reply->timeout > 0)
1213 rt->timeout = reply->timeout;
1215 if (rt->server_type == RTSP_SERVER_REAL)
1216 rt->need_subscription = 1;
1221 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1222 if (rt->rtsp_streams[i]->rtp_handle) {
1223 url_close(rt->rtsp_streams[i]->rtp_handle);
1224 rt->rtsp_streams[i]->rtp_handle = NULL;
1230 static int rtsp_read_play(AVFormatContext *s)
1232 RTSPState *rt = s->priv_data;
1233 RTSPMessageHeader reply1, *reply = &reply1;
1236 av_log(s, AV_LOG_DEBUG, "hello state=%d\n", rt->state);
1238 if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) {
1239 if (rt->state == RTSP_STATE_PAUSED) {
1240 snprintf(cmd, sizeof(cmd),
1241 "PLAY %s RTSP/1.0\r\n",
1244 snprintf(cmd, sizeof(cmd),
1245 "PLAY %s RTSP/1.0\r\n"
1246 "Range: npt=%0.3f-\r\n",
1248 (double)rt->seek_timestamp / AV_TIME_BASE);
1250 rtsp_send_cmd(s, cmd, reply, NULL);
1251 if (reply->status_code != RTSP_STATUS_OK) {
1255 rt->state = RTSP_STATE_STREAMING;
1259 static int rtsp_read_header(AVFormatContext *s,
1260 AVFormatParameters *ap)
1262 RTSPState *rt = s->priv_data;
1263 char host[1024], path[1024], tcpname[1024], cmd[2048], auth[128];
1264 char *option_list, *option, *filename;
1265 URLContext *rtsp_hd;
1267 RTSPMessageHeader reply1, *reply = &reply1;
1268 unsigned char *content = NULL;
1269 int lower_transport_mask = 0;
1270 char real_challenge[64];
1272 /* extract hostname and port */
1273 url_split(NULL, 0, auth, sizeof(auth),
1274 host, sizeof(host), &port, path, sizeof(path), s->filename);
1276 int auth_len = strlen(auth), b64_len = ((auth_len + 2) / 3) * 4 + 1;
1278 if (!(rt->auth_b64 = av_malloc(b64_len)))
1279 return AVERROR(ENOMEM);
1280 if (!av_base64_encode(rt->auth_b64, b64_len, auth, auth_len)) {
1281 err = AVERROR(EINVAL);
1286 port = RTSP_DEFAULT_PORT;
1288 /* search for options */
1289 option_list = strchr(path, '?');
1291 filename = strchr(s->filename, '?');
1292 while (option_list) {
1293 /* move the option pointer */
1294 option = ++option_list;
1295 option_list = strchr(option_list, '&');
1299 /* handle the options */
1300 if (!strcmp(option, "udp")) {
1301 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_UDP);
1302 } else if (!strcmp(option, "multicast")) {
1303 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_UDP_MULTICAST);
1304 } else if (!strcmp(option, "tcp")) {
1305 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_TCP);
1307 strcpy(++filename, option);
1308 filename += strlen(option);
1309 if (option_list) *filename = '&';
1315 if (!lower_transport_mask)
1316 lower_transport_mask = (1 << RTSP_LOWER_TRANSPORT_NB) - 1;
1318 /* open the tcp connexion */
1319 snprintf(tcpname, sizeof(tcpname), "tcp://%s:%d", host, port);
1320 if (url_open(&rtsp_hd, tcpname, URL_RDWR) < 0) {
1324 rt->rtsp_hd = rtsp_hd;
1327 /* request options supported by the server; this also detects server
1329 av_strlcpy(rt->control_uri, s->filename,
1330 sizeof(rt->control_uri));
1331 for (rt->server_type = RTSP_SERVER_RTP;;) {
1332 snprintf(cmd, sizeof(cmd),
1333 "OPTIONS %s RTSP/1.0\r\n", s->filename);
1334 if (rt->server_type == RTSP_SERVER_REAL)
1337 * The following entries are required for proper
1338 * streaming from a Realmedia server. They are
1339 * interdependent in some way although we currently
1340 * don't quite understand how. Values were copied
1341 * from mplayer SVN r23589.
1342 * @param CompanyID is a 16-byte ID in base64
1343 * @param ClientChallenge is a 16-byte ID in hex
1345 "ClientChallenge: 9e26d33f2984236010ef6253fb1887f7\r\n"
1346 "PlayerStarttime: [28/03/2003:22:50:23 00:00]\r\n"
1347 "CompanyID: KnKV4M4I/B2FjJ1TToLycw==\r\n"
1348 "GUID: 00000000-0000-0000-0000-000000000000\r\n",
1350 rtsp_send_cmd(s, cmd, reply, NULL);
1351 if (reply->status_code != RTSP_STATUS_OK) {
1352 err = AVERROR_INVALIDDATA;
1356 /* detect server type if not standard-compliant RTP */
1357 if (rt->server_type != RTSP_SERVER_REAL && reply->real_challenge[0]) {
1358 rt->server_type = RTSP_SERVER_REAL;
1360 } else if (!strncasecmp(reply->server, "WMServer/", 9)) {
1361 rt->server_type = RTSP_SERVER_WMS;
1362 } else if (rt->server_type == RTSP_SERVER_REAL)
1363 strcpy(real_challenge, reply->real_challenge);
1367 /* describe the stream */
1368 snprintf(cmd, sizeof(cmd),
1369 "DESCRIBE %s RTSP/1.0\r\n"
1370 "Accept: application/sdp\r\n",
1372 if (rt->server_type == RTSP_SERVER_REAL) {
1374 * The Require: attribute is needed for proper streaming from
1375 * Realmedia servers.
1378 "Require: com.real.retain-entity-for-setup\r\n",
1381 rtsp_send_cmd(s, cmd, reply, &content);
1383 err = AVERROR_INVALIDDATA;
1386 if (reply->status_code != RTSP_STATUS_OK) {
1387 err = AVERROR_INVALIDDATA;
1391 /* now we got the SDP description, we parse it */
1392 ret = sdp_parse(s, (const char *)content);
1395 err = AVERROR_INVALIDDATA;
1400 int lower_transport = ff_log2_tab[lower_transport_mask &
1401 ~(lower_transport_mask - 1)];
1403 err = make_setup_request(s, host, port, lower_transport,
1404 rt->server_type == RTSP_SERVER_REAL ?
1405 real_challenge : NULL);
1408 lower_transport_mask &= ~(1 << lower_transport);
1409 if (lower_transport_mask == 0 && err == 1) {
1410 err = AVERROR(FF_NETERROR(EPROTONOSUPPORT));
1415 rt->state = RTSP_STATE_IDLE;
1416 rt->seek_timestamp = 0; /* default is to start stream at position zero */
1417 if (ap->initial_pause) {
1418 /* do not start immediately */
1420 if (rtsp_read_play(s) < 0) {
1421 err = AVERROR_INVALIDDATA;
1427 rtsp_close_streams(s);
1429 url_close(rt->rtsp_hd);
1430 if (reply->status_code >=300 && reply->status_code < 400) {
1431 av_strlcpy(s->filename, reply->location, sizeof(s->filename));
1432 av_log(s, AV_LOG_INFO, "Status %d: Redirecting to %s\n",
1440 static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1441 uint8_t *buf, int buf_size)
1443 RTSPState *rt = s->priv_data;
1444 RTSPStream *rtsp_st;
1446 int fd, fd_max, n, i, ret, tcp_fd;
1450 if (url_interrupt_cb())
1451 return AVERROR(EINTR);
1454 tcp_fd = fd_max = url_get_file_handle(rt->rtsp_hd);
1455 FD_SET(tcp_fd, &rfds);
1460 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1461 rtsp_st = rt->rtsp_streams[i];
1462 if (rtsp_st->rtp_handle) {
1463 /* currently, we cannot probe RTCP handle because of
1464 * blocking restrictions */
1465 fd = url_get_file_handle(rtsp_st->rtp_handle);
1472 tv.tv_usec = 100 * 1000;
1473 n = select(fd_max + 1, &rfds, NULL, NULL, &tv);
1475 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1476 rtsp_st = rt->rtsp_streams[i];
1477 if (rtsp_st->rtp_handle) {
1478 fd = url_get_file_handle(rtsp_st->rtp_handle);
1479 if (FD_ISSET(fd, &rfds)) {
1480 ret = url_read(rtsp_st->rtp_handle, buf, buf_size);
1482 *prtsp_st = rtsp_st;
1488 #if CONFIG_RTSP_DEMUXER
1489 if (tcp_fd != -1 && FD_ISSET(tcp_fd, &rfds)) {
1490 RTSPMessageHeader reply;
1492 rtsp_read_reply(s, &reply, NULL, 0);
1493 /* XXX: parse message */
1494 if (rt->state != RTSP_STATE_STREAMING)
1502 static int tcp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1503 uint8_t *buf, int buf_size)
1505 RTSPState *rt = s->priv_data;
1506 int id, len, i, ret;
1507 RTSPStream *rtsp_st;
1509 #ifdef DEBUG_RTP_TCP
1510 dprintf(s, "tcp_read_packet:\n");
1514 RTSPMessageHeader reply;
1516 ret = rtsp_read_reply(s, &reply, NULL, 1);
1519 if (ret == 1) /* received '$' */
1521 /* XXX: parse message */
1522 if (rt->state != RTSP_STATE_STREAMING)
1525 ret = url_read_complete(rt->rtsp_hd, buf, 3);
1529 len = AV_RB16(buf + 1);
1530 #ifdef DEBUG_RTP_TCP
1531 dprintf(s, "id=%d len=%d\n", id, len);
1533 if (len > buf_size || len < 12)
1536 ret = url_read_complete(rt->rtsp_hd, buf, len);
1539 if (rt->transport == RTSP_TRANSPORT_RDT &&
1540 ff_rdt_parse_header(buf, len, &id, NULL, NULL, NULL, NULL) < 0)
1543 /* find the matching stream */
1544 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1545 rtsp_st = rt->rtsp_streams[i];
1546 if (id >= rtsp_st->interleaved_min &&
1547 id <= rtsp_st->interleaved_max)
1552 *prtsp_st = rtsp_st;
1556 static int rtsp_fetch_packet(AVFormatContext *s, AVPacket *pkt)
1558 RTSPState *rt = s->priv_data;
1560 uint8_t buf[10 * RTP_MAX_PACKET_LENGTH];
1561 RTSPStream *rtsp_st;
1563 /* get next frames from the same RTP packet */
1564 if (rt->cur_transport_priv) {
1565 if (rt->transport == RTSP_TRANSPORT_RDT) {
1566 ret = ff_rdt_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
1568 ret = rtp_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
1570 rt->cur_transport_priv = NULL;
1572 } else if (ret == 1) {
1575 rt->cur_transport_priv = NULL;
1578 /* read next RTP packet */
1580 switch(rt->lower_transport) {
1582 #if CONFIG_RTSP_DEMUXER
1583 case RTSP_LOWER_TRANSPORT_TCP:
1584 len = tcp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1587 case RTSP_LOWER_TRANSPORT_UDP:
1588 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
1589 len = udp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1590 if (len >=0 && rtsp_st->transport_priv && rt->transport == RTSP_TRANSPORT_RTP)
1591 rtp_check_and_send_back_rr(rtsp_st->transport_priv, len);
1598 if (rt->transport == RTSP_TRANSPORT_RDT) {
1599 ret = ff_rdt_parse_packet(rtsp_st->transport_priv, pkt, buf, len);
1601 ret = rtp_parse_packet(rtsp_st->transport_priv, pkt, buf, len);
1605 /* more packets may follow, so we save the RTP context */
1606 rt->cur_transport_priv = rtsp_st->transport_priv;
1611 static int rtsp_read_packet(AVFormatContext *s, AVPacket *pkt)
1613 RTSPState *rt = s->priv_data;
1615 RTSPMessageHeader reply1, *reply = &reply1;
1618 if (rt->server_type == RTSP_SERVER_REAL) {
1620 enum AVDiscard cache[MAX_STREAMS];
1622 for (i = 0; i < s->nb_streams; i++)
1623 cache[i] = s->streams[i]->discard;
1625 if (!rt->need_subscription) {
1626 if (memcmp (cache, rt->real_setup_cache,
1627 sizeof(enum AVDiscard) * s->nb_streams)) {
1628 snprintf(cmd, sizeof(cmd),
1629 "SET_PARAMETER %s RTSP/1.0\r\n"
1630 "Unsubscribe: %s\r\n",
1631 rt->control_uri, rt->last_subscription);
1632 rtsp_send_cmd(s, cmd, reply, NULL);
1633 if (reply->status_code != RTSP_STATUS_OK)
1634 return AVERROR_INVALIDDATA;
1635 rt->need_subscription = 1;
1639 if (rt->need_subscription) {
1640 int r, rule_nr, first = 1;
1642 memcpy(rt->real_setup_cache, cache,
1643 sizeof(enum AVDiscard) * s->nb_streams);
1644 rt->last_subscription[0] = 0;
1646 snprintf(cmd, sizeof(cmd),
1647 "SET_PARAMETER %s RTSP/1.0\r\n"
1650 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1652 for (r = 0; r < s->nb_streams; r++) {
1653 if (s->streams[r]->priv_data == rt->rtsp_streams[i]) {
1654 if (s->streams[r]->discard != AVDISCARD_ALL) {
1656 av_strlcat(rt->last_subscription, ",",
1657 sizeof(rt->last_subscription));
1658 ff_rdt_subscribe_rule(
1659 rt->last_subscription,
1660 sizeof(rt->last_subscription), i, rule_nr);
1667 av_strlcatf(cmd, sizeof(cmd), "%s\r\n", rt->last_subscription);
1668 rtsp_send_cmd(s, cmd, reply, NULL);
1669 if (reply->status_code != RTSP_STATUS_OK)
1670 return AVERROR_INVALIDDATA;
1671 rt->need_subscription = 0;
1673 if (rt->state == RTSP_STATE_STREAMING)
1678 ret = rtsp_fetch_packet(s, pkt);
1682 /* send dummy request to keep TCP connection alive */
1683 if ((rt->server_type == RTSP_SERVER_WMS ||
1684 rt->server_type == RTSP_SERVER_REAL) &&
1685 (av_gettime() - rt->last_cmd_time) / 1000000 >= rt->timeout / 2) {
1686 if (rt->server_type == RTSP_SERVER_WMS) {
1687 snprintf(cmd, sizeof(cmd) - 1,
1688 "GET_PARAMETER %s RTSP/1.0\r\n",
1690 rtsp_send_cmd_async(s, cmd);
1692 rtsp_send_cmd_async(s, "OPTIONS * RTSP/1.0\r\n");
1699 /* pause the stream */
1700 static int rtsp_read_pause(AVFormatContext *s)
1702 RTSPState *rt = s->priv_data;
1703 RTSPMessageHeader reply1, *reply = &reply1;
1708 if (rt->state != RTSP_STATE_STREAMING)
1710 else if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) {
1711 snprintf(cmd, sizeof(cmd),
1712 "PAUSE %s RTSP/1.0\r\n",
1714 rtsp_send_cmd(s, cmd, reply, NULL);
1715 if (reply->status_code != RTSP_STATUS_OK) {
1719 rt->state = RTSP_STATE_PAUSED;
1723 static int rtsp_read_seek(AVFormatContext *s, int stream_index,
1724 int64_t timestamp, int flags)
1726 RTSPState *rt = s->priv_data;
1728 rt->seek_timestamp = av_rescale_q(timestamp,
1729 s->streams[stream_index]->time_base,
1733 case RTSP_STATE_IDLE:
1735 case RTSP_STATE_STREAMING:
1736 if (rtsp_read_pause(s) != 0)
1738 rt->state = RTSP_STATE_SEEKING;
1739 if (rtsp_read_play(s) != 0)
1742 case RTSP_STATE_PAUSED:
1743 rt->state = RTSP_STATE_IDLE;
1749 static int rtsp_read_close(AVFormatContext *s)
1751 RTSPState *rt = s->priv_data;
1755 /* NOTE: it is valid to flush the buffer here */
1756 if (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
1757 url_fclose(&rt->rtsp_gb);
1760 snprintf(cmd, sizeof(cmd),
1761 "TEARDOWN %s RTSP/1.0\r\n",
1763 rtsp_send_cmd_async(s, cmd);
1765 rtsp_close_streams(s);
1766 url_close(rt->rtsp_hd);
1770 AVInputFormat rtsp_demuxer = {
1772 NULL_IF_CONFIG_SMALL("RTSP input format"),
1779 .flags = AVFMT_NOFILE,
1780 .read_play = rtsp_read_play,
1781 .read_pause = rtsp_read_pause,
1785 static int sdp_probe(AVProbeData *p1)
1787 const char *p = p1->buf, *p_end = p1->buf + p1->buf_size;
1789 /* we look for a line beginning "c=IN IP4" */
1790 while (p < p_end && *p != '\0') {
1791 if (p + sizeof("c=IN IP4") - 1 < p_end &&
1792 av_strstart(p, "c=IN IP4", NULL))
1793 return AVPROBE_SCORE_MAX / 2;
1795 while (p < p_end - 1 && *p != '\n') p++;
1804 #define SDP_MAX_SIZE 8192
1806 static int sdp_read_header(AVFormatContext *s, AVFormatParameters *ap)
1808 RTSPState *rt = s->priv_data;
1809 RTSPStream *rtsp_st;
1814 /* read the whole sdp file */
1815 /* XXX: better loading */
1816 content = av_malloc(SDP_MAX_SIZE);
1817 size = get_buffer(s->pb, content, SDP_MAX_SIZE - 1);
1820 return AVERROR_INVALIDDATA;
1822 content[size] ='\0';
1824 sdp_parse(s, content);
1827 /* open each RTP stream */
1828 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1829 rtsp_st = rt->rtsp_streams[i];
1831 snprintf(url, sizeof(url), "rtp://%s:%d?localport=%d&ttl=%d",
1832 inet_ntoa(rtsp_st->sdp_ip),
1836 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1837 err = AVERROR_INVALIDDATA;
1840 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
1845 rtsp_close_streams(s);
1849 static int sdp_read_close(AVFormatContext *s)
1851 rtsp_close_streams(s);
1855 AVInputFormat sdp_demuxer = {
1857 NULL_IF_CONFIG_SMALL("SDP"),