3 * @brief Real-Time Protocol (RTP) demux module for VLC media player
5 /*****************************************************************************
6 * Copyright (C) 2001-2005 the VideoLAN team
7 * Copyright © 2007-2009 Rémi Denis-Courmont
9 * This library is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License
11 * as published by the Free Software Foundation; either version 2.0
12 * of the License, or (at your option) any later version.
14 * This library is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU Lesser General Public
20 * License along with this library; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
22 ****************************************************************************/
31 #include <vlc_common.h>
32 #include <vlc_demux.h>
34 #include <vlc_network.h>
35 #include <vlc_plugin.h>
37 #include <vlc_codecs.h>
44 #define RTP_CACHING_TEXT N_("RTP de-jitter buffer length (msec)")
45 #define RTP_CACHING_LONGTEXT N_( \
46 "How long to wait for late RTP packets (and delay the performance)." )
48 #define RTCP_PORT_TEXT N_("RTCP (local) port")
49 #define RTCP_PORT_LONGTEXT N_( \
50 "RTCP packets will be received on this transport protocol port. " \
51 "If zero, multiplexed RTP/RTCP is used.")
53 #define SRTP_KEY_TEXT N_("SRTP key (hexadecimal)")
54 #define SRTP_KEY_LONGTEXT N_( \
55 "RTP packets will be authenticated and deciphered "\
56 "with this Secure RTP master shared secret key.")
58 #define SRTP_SALT_TEXT N_("SRTP salt (hexadecimal)")
59 #define SRTP_SALT_LONGTEXT N_( \
60 "Secure RTP requires a (non-secret) master salt value.")
62 #define RTP_MAX_SRC_TEXT N_("Maximum RTP sources")
63 #define RTP_MAX_SRC_LONGTEXT N_( \
64 "How many distinct active RTP sources are allowed at a time." )
66 #define RTP_TIMEOUT_TEXT N_("RTP source timeout (sec)")
67 #define RTP_TIMEOUT_LONGTEXT N_( \
68 "How long to wait for any packet before a source is expired.")
70 #define RTP_MAX_DROPOUT_TEXT N_("Maximum RTP sequence number dropout")
71 #define RTP_MAX_DROPOUT_LONGTEXT N_( \
72 "RTP packets will be discarded if they are too much ahead (i.e. in the " \
73 "future) by this many packets from the last received packet." )
75 #define RTP_MAX_MISORDER_TEXT N_("Maximum RTP sequence number misordering")
76 #define RTP_MAX_MISORDER_LONGTEXT N_( \
77 "RTP packets will be discarded if they are too far behind (i.e. in the " \
78 "past) by this many packets from the last received packet." )
80 static int Open (vlc_object_t *);
81 static void Close (vlc_object_t *);
87 set_shortname (N_("RTP"))
88 set_description (N_("Real-Time Protocol (RTP) input"))
89 set_category (CAT_INPUT)
90 set_subcategory (SUBCAT_INPUT_DEMUX)
91 set_capability ("access_demux", 0)
92 set_callbacks (Open, Close)
94 add_integer ("rtp-caching", 1000, NULL, RTP_CACHING_TEXT,
95 RTP_CACHING_LONGTEXT, true)
96 change_integer_range (0, 65535)
98 add_integer ("rtcp-port", 0, NULL, RTCP_PORT_TEXT,
99 RTCP_PORT_LONGTEXT, false)
100 change_integer_range (0, 65535)
103 add_string ("srtp-key", "", NULL,
104 SRTP_KEY_TEXT, SRTP_KEY_LONGTEXT, false)
105 add_string ("srtp-salt", "", NULL,
106 SRTP_SALT_TEXT, SRTP_SALT_LONGTEXT, false)
108 add_integer ("rtp-max-src", 1, NULL, RTP_MAX_SRC_TEXT,
109 RTP_MAX_SRC_LONGTEXT, true)
110 change_integer_range (1, 255)
111 add_integer ("rtp-timeout", 5, NULL, RTP_TIMEOUT_TEXT,
112 RTP_TIMEOUT_LONGTEXT, true)
113 add_integer ("rtp-max-dropout", 3000, NULL, RTP_MAX_DROPOUT_TEXT,
114 RTP_MAX_DROPOUT_LONGTEXT, true)
115 change_integer_range (0, 32767)
116 add_integer ("rtp-max-misorder", 100, NULL, RTP_MAX_MISORDER_TEXT,
117 RTP_MAX_MISORDER_LONGTEXT, true)
118 change_integer_range (0, 32767)
120 add_shortcut ("dccp")
121 /*add_shortcut ("sctp")*/
122 add_shortcut ("rtptcp") /* "tcp" is already taken :( */
124 add_shortcut ("udplite")
128 * TODO: so much stuff
129 * - send RTCP-RR and RTCP-BYE
130 * - dynamic payload types (need SDP parser)
131 * - multiple medias (need SDP parser, and RTCP-SR parser for lip-sync)
132 * - support for stream_filter in case of stream_Demux (MPEG-TS)
136 # define IPPROTO_DCCP 33 /* IANA */
139 #ifndef IPPROTO_UDPLITE
140 # define IPPROTO_UDPLITE 136 /* from IANA */
147 static int Control (demux_t *, int i_query, va_list args);
148 static int extract_port (char **phost);
151 * Probes and initializes.
153 static int Open (vlc_object_t *obj)
155 demux_t *demux = (demux_t *)obj;
156 int tp; /* transport protocol */
158 if (!strcmp (demux->psz_access, "dccp"))
161 if (!strcmp (demux->psz_access, "rtptcp"))
164 if (!strcmp (demux->psz_access, "rtp"))
167 if (!strcmp (demux->psz_access, "udplite"))
168 tp = IPPROTO_UDPLITE;
172 char *tmp = strdup (demux->psz_path);
177 char *dhost = strchr (shost, '@');
181 /* Parses the port numbers */
182 int sport = 0, dport = 0;
183 sport = extract_port (&shost);
185 dport = extract_port (&dhost);
187 dport = 5004; /* avt-profile-1 port */
189 int rtcp_dport = var_CreateGetInteger (obj, "rtcp-port");
192 int fd = -1, rtcp_fd = -1;
197 case IPPROTO_UDPLITE:
198 fd = net_OpenDgram (obj, dhost, dport,
199 shost, sport, AF_UNSPEC, tp);
202 if (rtcp_dport > 0) /* XXX: source port is unknown */
203 rtcp_fd = net_OpenDgram (obj, dhost, rtcp_dport, shost, 0,
208 #ifndef SOCK_DCCP /* provisional API (FIXME) */
214 var_Create (obj, "dccp-service", VLC_VAR_STRING);
215 var_SetString (obj, "dccp-service", "RTPV"); /* FIXME: RTPA? */
216 fd = net_Connect (obj, shost, sport, SOCK_DCCP, tp);
218 msg_Err (obj, "DCCP support not included");
223 fd = net_Connect (obj, shost, sport, SOCK_STREAM, tp);
230 net_SetCSCov (fd, -1, 12);
232 /* Initializes demux */
233 demux_sys_t *p_sys = malloc (sizeof (*p_sys));
242 vlc_mutex_init (&p_sys->lock);
247 p_sys->rtcp_fd = rtcp_fd;
248 p_sys->caching = var_CreateGetInteger (obj, "rtp-caching");
249 p_sys->max_src = var_CreateGetInteger (obj, "rtp-max-src");
250 p_sys->timeout = var_CreateGetInteger (obj, "rtp-timeout");
251 p_sys->max_dropout = var_CreateGetInteger (obj, "rtp-max-dropout");
252 p_sys->max_misorder = var_CreateGetInteger (obj, "rtp-max-misorder");
253 p_sys->framed_rtp = (tp == IPPROTO_TCP);
255 demux->pf_demux = NULL;
256 demux->pf_control = Control;
257 demux->p_sys = p_sys;
259 p_sys->session = rtp_session_create (demux);
260 if (p_sys->session == NULL)
264 char *key = var_CreateGetNonEmptyString (demux, "srtp-key");
267 p_sys->srtp = srtp_create (SRTP_ENCR_AES_CM, SRTP_AUTH_HMAC_SHA1, 10,
268 SRTP_PRF_AES_CM, SRTP_RCC_MODE1);
269 if (p_sys->srtp == NULL)
275 char *salt = var_CreateGetNonEmptyString (demux, "srtp-salt");
276 errno = srtp_setkeystring (p_sys->srtp, key, salt ? salt : "");
281 msg_Err (obj, "bad SRTP key/salt combination (%m)");
287 if (vlc_clone (&p_sys->thread, rtp_thread, demux,
288 VLC_THREAD_PRIORITY_INPUT))
290 p_sys->thread_ready = true;
302 static void Close (vlc_object_t *obj)
304 demux_t *demux = (demux_t *)obj;
305 demux_sys_t *p_sys = demux->p_sys;
307 if (p_sys->thread_ready)
309 vlc_cancel (p_sys->thread);
310 vlc_join (p_sys->thread, NULL);
312 vlc_mutex_destroy (&p_sys->lock);
316 srtp_destroy (p_sys->srtp);
319 rtp_session_destroy (demux, p_sys->session);
320 if (p_sys->rtcp_fd != -1)
321 net_Close (p_sys->rtcp_fd);
322 net_Close (p_sys->fd);
328 * Extracts port number from "[host]:port" or "host:port" strings,
329 * and remove brackets from the host name.
330 * @param phost pointer to the string upon entry,
331 * pointer to the hostname upon return.
332 * @return port number, 0 if missing.
334 static int extract_port (char **phost)
336 char *host = *phost, *port;
340 host = ++*phost; /* skip '[' */
341 port = strchr (host, ']');
343 *port++ = '\0'; /* skip ']' */
346 port = strchr (host, ':');
350 *port++ = '\0'; /* skip ':' */
358 static int Control (demux_t *demux, int i_query, va_list args)
360 demux_sys_t *p_sys = demux->p_sys;
364 case DEMUX_GET_POSITION:
366 float *v = va_arg (args, float *);
371 case DEMUX_GET_LENGTH:
374 int64_t *v = va_arg (args, int64_t *);
379 case DEMUX_GET_PTS_DELAY:
381 int64_t *v = va_arg (args, int64_t *);
382 *v = (int64_t)p_sys->caching * 1000;
386 case DEMUX_CAN_PAUSE:
388 case DEMUX_CAN_CONTROL_PACE:
390 bool *v = (bool*)va_arg( args, bool * );
401 * Generic packet handlers
404 static void *codec_init (demux_t *demux, es_format_t *fmt)
406 return es_out_Add (demux->out, fmt);
409 static void codec_destroy (demux_t *demux, void *data)
412 es_out_Del (demux->out, (es_out_id_t *)data);
415 /* Send a packet to decoder */
416 static void codec_decode (demux_t *demux, void *data, block_t *block)
420 block->i_dts = 0; /* RTP does not specify this */
421 es_out_Control (demux->out, ES_OUT_SET_PCR, block->i_pts );
422 es_out_Send (demux->out, (es_out_id_t *)data, block);
425 block_Release (block);
429 static void *stream_init (demux_t *demux, const char *name)
431 return stream_DemuxNew (demux, name, demux->out);
434 static void stream_destroy (demux_t *demux, void *data)
437 stream_Delete ((stream_t *)data);
441 /* Send a packet to a chained demuxer */
442 static void stream_decode (demux_t *demux, void *data, block_t *block)
445 stream_DemuxSend ((stream_t *)data, block);
447 block_Release (block);
452 * Static payload types handler
456 * PCMU: G.711 µ-law (RFC3551)
458 static void *pcmu_init (demux_t *demux)
462 es_format_Init (&fmt, AUDIO_ES, VLC_CODEC_MULAW);
463 fmt.audio.i_rate = 8000;
464 fmt.audio.i_channels = 1;
465 return codec_init (demux, &fmt);
471 static void *gsm_init (demux_t *demux)
475 es_format_Init (&fmt, AUDIO_ES, VLC_CODEC_GSM);
476 fmt.audio.i_rate = 8000;
477 fmt.audio.i_channels = 1;
478 return codec_init (demux, &fmt);
482 * PCMA: G.711 A-law (RFC3551)
484 static void *pcma_init (demux_t *demux)
488 es_format_Init (&fmt, AUDIO_ES, VLC_CODEC_ALAW);
489 fmt.audio.i_rate = 8000;
490 fmt.audio.i_channels = 1;
491 return codec_init (demux, &fmt);
495 * L16: 16-bits (network byte order) PCM
497 static void *l16s_init (demux_t *demux)
501 es_format_Init (&fmt, AUDIO_ES, VLC_CODEC_S16B);
502 fmt.audio.i_rate = 44100;
503 fmt.audio.i_channels = 2;
504 return codec_init (demux, &fmt);
507 static void *l16m_init (demux_t *demux)
511 es_format_Init (&fmt, AUDIO_ES, VLC_CODEC_S16B);
512 fmt.audio.i_rate = 44100;
513 fmt.audio.i_channels = 1;
514 return codec_init (demux, &fmt);
520 static void *qcelp_init (demux_t *demux)
524 es_format_Init (&fmt, AUDIO_ES, VLC_CODEC_QCELP);
525 fmt.audio.i_rate = 8000;
526 fmt.audio.i_channels = 1;
527 return codec_init (demux, &fmt);
531 * MPA: MPEG Audio (RFC2250, §3.4)
533 static void *mpa_init (demux_t *demux)
537 es_format_Init (&fmt, AUDIO_ES, VLC_CODEC_MPGA);
538 fmt.audio.i_channels = 2;
539 fmt.b_packetized = false;
540 return codec_init (demux, &fmt);
543 static void mpa_decode (demux_t *demux, void *data, block_t *block)
545 if (block->i_buffer < 4)
547 block_Release (block);
551 block->i_buffer -= 4; /* 32-bits RTP/MPA header */
552 block->p_buffer += 4;
554 codec_decode (demux, data, block);
559 * MPV: MPEG Video (RFC2250, §3.5)
561 static void *mpv_init (demux_t *demux)
565 es_format_Init (&fmt, VIDEO_ES, VLC_CODEC_MPGV);
566 fmt.b_packetized = false;
567 return codec_init (demux, &fmt);
570 static void mpv_decode (demux_t *demux, void *data, block_t *block)
572 if (block->i_buffer < 4)
574 block_Release (block);
578 block->i_buffer -= 4; /* 32-bits RTP/MPV header */
579 block->p_buffer += 4;
581 if (block->p_buffer[-3] & 0x4)
583 /* MPEG2 Video extension header */
584 /* TODO: shouldn't we skip this too ? */
587 codec_decode (demux, data, block);
592 * MP2: MPEG TS (RFC2250, §2)
594 static void *ts_init (demux_t *demux)
596 return stream_init (demux, *demux->psz_demux ? demux->psz_demux : "ts");
600 /* Not using SDP, we need to guess the payload format used */
601 /* see http://www.iana.org/assignments/rtp-parameters */
602 int rtp_autodetect (demux_t *demux, rtp_session_t *session,
603 const block_t *block)
605 uint8_t ptype = rtp_ptype (block);
608 .destroy = codec_destroy,
609 .decode = codec_decode,
614 /* Remember to keep this in sync with modules/services_discovery/sap.c */
618 msg_Dbg (demux, "detected G.711 mu-law");
624 msg_Dbg (demux, "detected GSM");
630 msg_Dbg (demux, "detected G.711 A-law");
636 msg_Dbg (demux, "detected stereo PCM");
638 pt.frequency = 44100;
642 msg_Dbg (demux, "detected mono PCM");
644 pt.frequency = 44100;
648 msg_Dbg (demux, "detected QCELP");
649 pt.init = qcelp_init;
654 msg_Dbg (demux, "detected MPEG Audio");
656 pt.decode = mpa_decode;
657 pt.frequency = 90000;
661 msg_Dbg (demux, "detected MPEG Video");
663 pt.decode = mpv_decode;
664 pt.frequency = 90000;
668 msg_Dbg (demux, "detected MPEG2 TS");
670 pt.destroy = stream_destroy;
671 pt.decode = stream_decode;
672 pt.frequency = 90000;
678 rtp_add_type (demux, session, &pt);
683 * Dynamic payload type handlers
684 * Hmm, none implemented yet.