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Old RC: "rate" is a float nowadays (fix #4088)
[vlc/asuraparaju-public.git] / modules / stream_out / rtp.c
blob7587eff0be84e089b3e3ee4900f853ef7999318e
1 /*****************************************************************************
2 * rtp.c: rtp stream output module
3 *****************************************************************************
4 * Copyright (C) 2003-2004 the VideoLAN team
5 * Copyright © 2007-2008 Rémi Denis-Courmont
6 *
7 * Authors: Laurent Aimar <fenrir@via.ecp.fr>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program 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.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
22 *****************************************************************************/
23
24 /*****************************************************************************
25 * Preamble
26 *****************************************************************************/
27
28 #ifdef HAVE_CONFIG_H
29 # include "config.h"
30 #endif
31
32 #include <vlc_common.h>
33 #include <vlc_plugin.h>
34 #include <vlc_sout.h>
35 #include <vlc_block.h>
36
37 #include <vlc_httpd.h>
38 #include <vlc_url.h>
39 #include <vlc_network.h>
40 #include <vlc_fs.h>
41 #include <vlc_strings.h>
42 #include <vlc_rand.h>
43 #ifdef HAVE_SRTP
44 # include <srtp.h>
45 #endif
46
47 #include "rtp.h"
48
49 #ifdef HAVE_UNISTD_H
50 # include <sys/types.h>
51 # include <unistd.h>
52 #endif
53 #ifdef HAVE_ARPA_INET_H
54 # include <arpa/inet.h>
55 #endif
56 #ifdef HAVE_LINUX_DCCP_H
57 # include <linux/dccp.h>
58 #endif
59 #ifndef IPPROTO_DCCP
60 # define IPPROTO_DCCP 33
61 #endif
62 #ifndef IPPROTO_UDPLITE
63 # define IPPROTO_UDPLITE 136
64 #endif
65
66 #include <errno.h>
67
68 #include <assert.h>
69
70 /*****************************************************************************
71 * Module descriptor
72 *****************************************************************************/
73
74 #define DEST_TEXT N_("Destination")
75 #define DEST_LONGTEXT N_( \
76 "This is the output URL that will be used." )
77 #define SDP_TEXT N_("SDP")
78 #define SDP_LONGTEXT N_( \
79 "This allows you to specify how the SDP (Session Descriptor) for this RTP "\
80 "session will be made available. You must use an url: http://location to " \
81 "access the SDP via HTTP, rtsp://location for RTSP access, and sap:// " \
82 "for the SDP to be announced via SAP." )
83 #define SAP_TEXT N_("SAP announcing")
84 #define SAP_LONGTEXT N_("Announce this session with SAP.")
85 #define MUX_TEXT N_("Muxer")
86 #define MUX_LONGTEXT N_( \
87 "This allows you to specify the muxer used for the streaming output. " \
88 "Default is to use no muxer (standard RTP stream)." )
89
90 #define NAME_TEXT N_("Session name")
91 #define NAME_LONGTEXT N_( \
92 "This is the name of the session that will be announced in the SDP " \
93 "(Session Descriptor)." )
94 #define DESC_TEXT N_("Session description")
95 #define DESC_LONGTEXT N_( \
96 "This allows you to give a short description with details about the stream, " \
97 "that will be announced in the SDP (Session Descriptor)." )
98 #define URL_TEXT N_("Session URL")
99 #define URL_LONGTEXT N_( \
100 "This allows you to give an URL with more details about the stream " \
101 "(often the website of the streaming organization), that will " \
102 "be announced in the SDP (Session Descriptor)." )
103 #define EMAIL_TEXT N_("Session email")
104 #define EMAIL_LONGTEXT N_( \
105 "This allows you to give a contact mail address for the stream, that will " \
106 "be announced in the SDP (Session Descriptor)." )
107 #define PHONE_TEXT N_("Session phone number")
108 #define PHONE_LONGTEXT N_( \
109 "This allows you to give a contact telephone number for the stream, that will " \
110 "be announced in the SDP (Session Descriptor)." )
111
112 #define PORT_TEXT N_("Port")
113 #define PORT_LONGTEXT N_( \
114 "This allows you to specify the base port for the RTP streaming." )
115 #define PORT_AUDIO_TEXT N_("Audio port")
116 #define PORT_AUDIO_LONGTEXT N_( \
117 "This allows you to specify the default audio port for the RTP streaming." )
118 #define PORT_VIDEO_TEXT N_("Video port")
119 #define PORT_VIDEO_LONGTEXT N_( \
120 "This allows you to specify the default video port for the RTP streaming." )
121
122 #define TTL_TEXT N_("Hop limit (TTL)")
123 #define TTL_LONGTEXT N_( \
124 "This is the hop limit (also known as \"Time-To-Live\" or TTL) of " \
125 "the multicast packets sent by the stream output (-1 = use operating " \
126 "system built-in default).")
127
128 #define RTCP_MUX_TEXT N_("RTP/RTCP multiplexing")
129 #define RTCP_MUX_LONGTEXT N_( \
130 "This sends and receives RTCP packet multiplexed over the same port " \
131 "as RTP packets." )
132
133 #define CACHING_TEXT N_("Caching value (ms)")
134 #define CACHING_LONGTEXT N_( \
135 "Default caching value for outbound RTP streams. This " \
136 "value should be set in milliseconds." )
137
138 #define PROTO_TEXT N_("Transport protocol")
139 #define PROTO_LONGTEXT N_( \
140 "This selects which transport protocol to use for RTP." )
141
142 #define SRTP_KEY_TEXT N_("SRTP key (hexadecimal)")
143 #define SRTP_KEY_LONGTEXT N_( \
144 "RTP packets will be integrity-protected and ciphered "\
145 "with this Secure RTP master shared secret key.")
146
147 #define SRTP_SALT_TEXT N_("SRTP salt (hexadecimal)")
148 #define SRTP_SALT_LONGTEXT N_( \
149 "Secure RTP requires a (non-secret) master salt value.")
150
151 static const char *const ppsz_protos[] = {
152 "dccp", "sctp", "tcp", "udp", "udplite",
153 };
154
155 static const char *const ppsz_protocols[] = {
156 "DCCP", "SCTP", "TCP", "UDP", "UDP-Lite",
157 };
158
159 #define RFC3016_TEXT N_("MP4A LATM")
160 #define RFC3016_LONGTEXT N_( \
161 "This allows you to stream MPEG4 LATM audio streams (see RFC3016)." )
162
163 static int Open ( vlc_object_t * );
164 static void Close( vlc_object_t * );
165
166 #define SOUT_CFG_PREFIX "sout-rtp-"
167 #define MAX_EMPTY_BLOCKS 200
168
169 vlc_module_begin ()
170 set_shortname( N_("RTP"))
171 set_description( N_("RTP stream output") )
172 set_capability( "sout stream", 0 )
173 add_shortcut( "rtp" )
174 set_category( CAT_SOUT )
175 set_subcategory( SUBCAT_SOUT_STREAM )
176
177 add_string( SOUT_CFG_PREFIX "dst", "", NULL, DEST_TEXT,
178 DEST_LONGTEXT, true )
179 add_string( SOUT_CFG_PREFIX "sdp", "", NULL, SDP_TEXT,
180 SDP_LONGTEXT, true )
181 add_string( SOUT_CFG_PREFIX "mux", "", NULL, MUX_TEXT,
182 MUX_LONGTEXT, true )
183 add_bool( SOUT_CFG_PREFIX "sap", false, NULL, SAP_TEXT, SAP_LONGTEXT,
184 true )
185
186 add_string( SOUT_CFG_PREFIX "name", "", NULL, NAME_TEXT,
187 NAME_LONGTEXT, true )
188 add_string( SOUT_CFG_PREFIX "description", "", NULL, DESC_TEXT,
189 DESC_LONGTEXT, true )
190 add_string( SOUT_CFG_PREFIX "url", "", NULL, URL_TEXT,
191 URL_LONGTEXT, true )
192 add_string( SOUT_CFG_PREFIX "email", "", NULL, EMAIL_TEXT,
193 EMAIL_LONGTEXT, true )
194 add_string( SOUT_CFG_PREFIX "phone", "", NULL, PHONE_TEXT,
195 PHONE_LONGTEXT, true )
196
197 add_string( SOUT_CFG_PREFIX "proto", "udp", NULL, PROTO_TEXT,
198 PROTO_LONGTEXT, false )
199 change_string_list( ppsz_protos, ppsz_protocols, NULL )
200 add_integer( SOUT_CFG_PREFIX "port", 5004, NULL, PORT_TEXT,
201 PORT_LONGTEXT, true )
202 add_integer( SOUT_CFG_PREFIX "port-audio", 0, NULL, PORT_AUDIO_TEXT,
203 PORT_AUDIO_LONGTEXT, true )
204 add_integer( SOUT_CFG_PREFIX "port-video", 0, NULL, PORT_VIDEO_TEXT,
205 PORT_VIDEO_LONGTEXT, true )
206
207 add_integer( SOUT_CFG_PREFIX "ttl", -1, NULL, TTL_TEXT,
208 TTL_LONGTEXT, true )
209 add_bool( SOUT_CFG_PREFIX "rtcp-mux", false, NULL,
210 RTCP_MUX_TEXT, RTCP_MUX_LONGTEXT, false )
211 add_integer( SOUT_CFG_PREFIX "caching", DEFAULT_PTS_DELAY / 1000, NULL,
212 CACHING_TEXT, CACHING_LONGTEXT, true )
213
214 #ifdef HAVE_SRTP
215 add_string( SOUT_CFG_PREFIX "key", "", NULL,
216 SRTP_KEY_TEXT, SRTP_KEY_LONGTEXT, false )
217 add_string( SOUT_CFG_PREFIX "salt", "", NULL,
218 SRTP_SALT_TEXT, SRTP_SALT_LONGTEXT, false )
219 #endif
220
221 add_bool( SOUT_CFG_PREFIX "mp4a-latm", false, NULL, RFC3016_TEXT,
222 RFC3016_LONGTEXT, false )
223
224 set_callbacks( Open, Close )
225 vlc_module_end ()
226
227 /*****************************************************************************
228 * Exported prototypes
229 *****************************************************************************/
230 static const char *const ppsz_sout_options[] = {
231 "dst", "name", "port", "port-audio", "port-video", "*sdp", "ttl", "mux",
232 "sap", "description", "url", "email", "phone",
233 "proto", "rtcp-mux", "caching", "key", "salt",
234 "mp4a-latm", NULL
235 };
236
237 static sout_stream_id_t *Add ( sout_stream_t *, es_format_t * );
238 static int Del ( sout_stream_t *, sout_stream_id_t * );
239 static int Send( sout_stream_t *, sout_stream_id_t *,
240 block_t* );
241 static sout_stream_id_t *MuxAdd ( sout_stream_t *, es_format_t * );
242 static int MuxDel ( sout_stream_t *, sout_stream_id_t * );
243 static int MuxSend( sout_stream_t *, sout_stream_id_t *,
244 block_t* );
245
246 static sout_access_out_t *GrabberCreate( sout_stream_t *p_sout );
247 static void* ThreadSend( void * );
248 static void *rtp_listen_thread( void * );
249
250 static void SDPHandleUrl( sout_stream_t *, const char * );
251
252 static int SapSetup( sout_stream_t *p_stream );
253 static int FileSetup( sout_stream_t *p_stream );
254 static int HttpSetup( sout_stream_t *p_stream, const vlc_url_t * );
255
256 struct sout_stream_sys_t
257 {
258 /* SDP */
259 char *psz_sdp;
260 vlc_mutex_t lock_sdp;
261
262 /* SDP to disk */
263 char *psz_sdp_file;
264
265 /* SDP via SAP */
266 bool b_export_sap;
267 session_descriptor_t *p_session;
268
269 /* SDP via HTTP */
270 httpd_host_t *p_httpd_host;
271 httpd_file_t *p_httpd_file;
272
273 /* RTSP */
274 rtsp_stream_t *rtsp;
275
276 /* RTSP NPT and timestamp computations */
277 mtime_t i_npt_zero; /* when NPT=0 packet is sent */
278 int64_t i_pts_zero; /* predicts PTS of NPT=0 packet */
279 int64_t i_pts_offset; /* matches actual PTS to prediction */
280 vlc_mutex_t lock_ts;
281
282 /* */
283 char *psz_destination;
284 uint32_t payload_bitmap;
285 uint16_t i_port;
286 uint16_t i_port_audio;
287 uint16_t i_port_video;
288 uint8_t proto;
289 bool rtcp_mux;
290 int i_ttl:9;
291 bool b_latm;
292
293 /* in case we do TS/PS over rtp */
294 sout_mux_t *p_mux;
295 sout_access_out_t *p_grab;
296 block_t *packet;
297
298 /* */
299 vlc_mutex_t lock_es;
300 int i_es;
301 sout_stream_id_t **es;
302 };
303
304 typedef int (*pf_rtp_packetizer_t)( sout_stream_id_t *, block_t * );
305
306 typedef struct rtp_sink_t
307 {
308 int rtp_fd;
309 rtcp_sender_t *rtcp;
310 } rtp_sink_t;
311
312 struct sout_stream_id_t
313 {
314 sout_stream_t *p_stream;
315 /* rtp field */
316 uint16_t i_sequence;
317 uint8_t i_payload_type;
318 bool b_ts_init;
319 uint32_t i_ts_offset;
320 uint8_t ssrc[4];
321
322 /* for rtsp */
323 uint16_t i_seq_sent_next;
324
325 /* for sdp */
326 const char *psz_enc;
327 char *psz_fmtp;
328 int i_clock_rate;
329 int i_port;
330 int i_cat;
331 int i_channels;
332 int i_bitrate;
333
334 /* Packetizer specific fields */
335 int i_mtu;
336 #ifdef HAVE_SRTP
337 srtp_session_t *srtp;
338 #endif
339 pf_rtp_packetizer_t pf_packetize;
340
341 /* Packets sinks */
342 vlc_thread_t thread;
343 vlc_mutex_t lock_sink;
344 int sinkc;
345 rtp_sink_t *sinkv;
346 rtsp_stream_id_t *rtsp_id;
347 struct {
348 int *fd;
349 vlc_thread_t thread;
350 } listen;
351
352 block_fifo_t *p_fifo;
353 int64_t i_caching;
354 };
355
356 /*****************************************************************************
357 * Open:
358 *****************************************************************************/
359 static int Open( vlc_object_t *p_this )
360 {
361 sout_stream_t *p_stream = (sout_stream_t*)p_this;
362 sout_instance_t *p_sout = p_stream->p_sout;
363 sout_stream_sys_t *p_sys = NULL;
364 config_chain_t *p_cfg = NULL;
365 char *psz;
366 bool b_rtsp = false;
367
368 config_ChainParse( p_stream, SOUT_CFG_PREFIX,
369 ppsz_sout_options, p_stream->p_cfg );
370
371 p_sys = malloc( sizeof( sout_stream_sys_t ) );
372 if( p_sys == NULL )
373 return VLC_ENOMEM;
374
375 p_sys->psz_destination = var_GetNonEmptyString( p_stream, SOUT_CFG_PREFIX "dst" );
376
377 p_sys->i_port = var_GetInteger( p_stream, SOUT_CFG_PREFIX "port" );
378 p_sys->i_port_audio = var_GetInteger( p_stream, SOUT_CFG_PREFIX "port-audio" );
379 p_sys->i_port_video = var_GetInteger( p_stream, SOUT_CFG_PREFIX "port-video" );
380 p_sys->rtcp_mux = var_GetBool( p_stream, SOUT_CFG_PREFIX "rtcp-mux" );
381
382 if( p_sys->i_port_audio && p_sys->i_port_video == p_sys->i_port_audio )
383 {
384 msg_Err( p_stream, "audio and video RTP port must be distinct" );
385 free( p_sys->psz_destination );
386 free( p_sys );
387 return VLC_EGENERIC;
388 }
389
390 for( p_cfg = p_stream->p_cfg; p_cfg != NULL; p_cfg = p_cfg->p_next )
391 {
392 if( !strcmp( p_cfg->psz_name, "sdp" )
393 && ( p_cfg->psz_value != NULL )
394 && !strncasecmp( p_cfg->psz_value, "rtsp:", 5 ) )
395 {
396 b_rtsp = true;
397 break;
398 }
399 }
400 if( !b_rtsp )
401 {
402 psz = var_GetNonEmptyString( p_stream, SOUT_CFG_PREFIX "sdp" );
403 if( psz != NULL )
404 {
405 if( !strncasecmp( psz, "rtsp:", 5 ) )
406 b_rtsp = true;
407 free( psz );
408 }
409 }
410
411 /* Transport protocol */
412 p_sys->proto = IPPROTO_UDP;
413 psz = var_GetNonEmptyString (p_stream, SOUT_CFG_PREFIX"proto");
414
415 if ((psz == NULL) || !strcasecmp (psz, "udp"))
416 (void)0; /* default */
417 else
418 if (!strcasecmp (psz, "dccp"))
419 {
420 p_sys->proto = IPPROTO_DCCP;
421 p_sys->rtcp_mux = true; /* Force RTP/RTCP mux */
422 }
423 #if 0
424 else
425 if (!strcasecmp (psz, "sctp"))
426 {
427 p_sys->proto = IPPROTO_TCP;
428 p_sys->rtcp_mux = true; /* Force RTP/RTCP mux */
429 }
430 #endif
431 #if 0
432 else
433 if (!strcasecmp (psz, "tcp"))
434 {
435 p_sys->proto = IPPROTO_TCP;
436 p_sys->rtcp_mux = true; /* Force RTP/RTCP mux */
437 }
438 #endif
439 else
440 if (!strcasecmp (psz, "udplite") || !strcasecmp (psz, "udp-lite"))
441 p_sys->proto = IPPROTO_UDPLITE;
442 else
443 msg_Warn (p_this, "unknown or unsupported transport protocol \"%s\"",
444 psz);
445 free (psz);
446 var_Create (p_this, "dccp-service", VLC_VAR_STRING);
447
448 if( ( p_sys->psz_destination == NULL ) && !b_rtsp )
449 {
450 msg_Err( p_stream, "missing destination and not in RTSP mode" );
451 free( p_sys );
452 return VLC_EGENERIC;
453 }
454
455 p_sys->i_ttl = var_GetInteger( p_stream, SOUT_CFG_PREFIX "ttl" );
456 if( p_sys->i_ttl == -1 )
457 {
458 /* Normally, we should let the default hop limit up to the core,
459 * but we have to know it to write our RTSP headers properly,
460 * which is why we ask the core. FIXME: broken when neither
461 * sout-rtp-ttl nor ttl are set. */
462 p_sys->i_ttl = var_InheritInteger( p_stream, "ttl" );
463 }
464
465 p_sys->b_latm = var_GetBool( p_stream, SOUT_CFG_PREFIX "mp4a-latm" );
466
467 /* NPT=0 time will be determined when we packetize the first packet
468 * (of any ES). But we want to be able to report rtptime in RTSP
469 * without waiting. So until then, we use an arbitrary reference
470 * PTS for timestamp computations, and then actual PTS will catch
471 * up using offsets. */
472 p_sys->i_npt_zero = VLC_TS_INVALID;
473 p_sys->i_pts_zero = mdate(); /* arbitrary value, could probably be
474 * random */
475 p_sys->payload_bitmap = 0xFFFFFFFF;
476 p_sys->i_es = 0;
477 p_sys->es = NULL;
478 p_sys->rtsp = NULL;
479 p_sys->psz_sdp = NULL;
480
481 p_sys->b_export_sap = false;
482 p_sys->p_session = NULL;
483 p_sys->psz_sdp_file = NULL;
484
485 p_sys->p_httpd_host = NULL;
486 p_sys->p_httpd_file = NULL;
487
488 p_stream->p_sys = p_sys;
489
490 vlc_mutex_init( &p_sys->lock_sdp );
491 vlc_mutex_init( &p_sys->lock_ts );
492 vlc_mutex_init( &p_sys->lock_es );
493
494 psz = var_GetNonEmptyString( p_stream, SOUT_CFG_PREFIX "mux" );
495 if( psz != NULL )
496 {
497 sout_stream_id_t *id;
498
499 /* Check muxer type */
500 if( strncasecmp( psz, "ps", 2 )
501 && strncasecmp( psz, "mpeg1", 5 )
502 && strncasecmp( psz, "ts", 2 ) )
503 {
504 msg_Err( p_stream, "unsupported muxer type for RTP (only TS/PS)" );
505 free( psz );
506 vlc_mutex_destroy( &p_sys->lock_sdp );
507 vlc_mutex_destroy( &p_sys->lock_es );
508 free( p_sys->psz_destination );
509 free( p_sys );
510 return VLC_EGENERIC;
511 }
512
513 p_sys->p_grab = GrabberCreate( p_stream );
514 p_sys->p_mux = sout_MuxNew( p_sout, psz, p_sys->p_grab );
515 free( psz );
516
517 if( p_sys->p_mux == NULL )
518 {
519 msg_Err( p_stream, "cannot create muxer" );
520 sout_AccessOutDelete( p_sys->p_grab );
521 vlc_mutex_destroy( &p_sys->lock_sdp );
522 vlc_mutex_destroy( &p_sys->lock_es );
523 free( p_sys->psz_destination );
524 free( p_sys );
525 return VLC_EGENERIC;
526 }
527
528 id = Add( p_stream, NULL );
529 if( id == NULL )
530 {
531 sout_MuxDelete( p_sys->p_mux );
532 sout_AccessOutDelete( p_sys->p_grab );
533 vlc_mutex_destroy( &p_sys->lock_sdp );
534 vlc_mutex_destroy( &p_sys->lock_es );
535 free( p_sys->psz_destination );
536 free( p_sys );
537 return VLC_EGENERIC;
538 }
539
540 p_sys->packet = NULL;
541
542 p_stream->pf_add = MuxAdd;
543 p_stream->pf_del = MuxDel;
544 p_stream->pf_send = MuxSend;
545 }
546 else
547 {
548 p_sys->p_mux = NULL;
549 p_sys->p_grab = NULL;
550
551 p_stream->pf_add = Add;
552 p_stream->pf_del = Del;
553 p_stream->pf_send = Send;
554 }
555
556 if( var_GetBool( p_stream, SOUT_CFG_PREFIX"sap" ) )
557 SDPHandleUrl( p_stream, "sap" );
558
559 psz = var_GetNonEmptyString( p_stream, SOUT_CFG_PREFIX "sdp" );
560 if( psz != NULL )
561 {
562 config_chain_t *p_cfg;
563
564 SDPHandleUrl( p_stream, psz );
565
566 for( p_cfg = p_stream->p_cfg; p_cfg != NULL; p_cfg = p_cfg->p_next )
567 {
568 if( !strcmp( p_cfg->psz_name, "sdp" ) )
569 {
570 if( p_cfg->psz_value == NULL || *p_cfg->psz_value == '\0' )
571 continue;
572
573 /* needed both :sout-rtp-sdp= and rtp{sdp=} can be used */
574 if( !strcmp( p_cfg->psz_value, psz ) )
575 continue;
576
577 SDPHandleUrl( p_stream, p_cfg->psz_value );
578 }
579 }
580 free( psz );
581 }
582
583 /* update p_sout->i_out_pace_nocontrol */
584 p_stream->p_sout->i_out_pace_nocontrol++;
585
586 return VLC_SUCCESS;
587 }
588
589 /*****************************************************************************
590 * Close:
591 *****************************************************************************/
592 static void Close( vlc_object_t * p_this )
593 {
594 sout_stream_t *p_stream = (sout_stream_t*)p_this;
595 sout_stream_sys_t *p_sys = p_stream->p_sys;
596
597 /* update p_sout->i_out_pace_nocontrol */
598 p_stream->p_sout->i_out_pace_nocontrol--;
599
600 if( p_sys->p_mux )
601 {
602 assert( p_sys->i_es == 1 );
603
604 sout_MuxDelete( p_sys->p_mux );
605 Del( p_stream, p_sys->es[0] );
606 sout_AccessOutDelete( p_sys->p_grab );
607
608 if( p_sys->packet )
609 {
610 block_Release( p_sys->packet );
611 }
612 if( p_sys->b_export_sap )
613 {
614 p_sys->p_mux = NULL;
615 SapSetup( p_stream );
616 }
617 }
618
619 if( p_sys->rtsp != NULL )
620 RtspUnsetup( p_sys->rtsp );
621
622 vlc_mutex_destroy( &p_sys->lock_sdp );
623 vlc_mutex_destroy( &p_sys->lock_ts );
624 vlc_mutex_destroy( &p_sys->lock_es );
625
626 if( p_sys->p_httpd_file )
627 httpd_FileDelete( p_sys->p_httpd_file );
628
629 if( p_sys->p_httpd_host )
630 httpd_HostDelete( p_sys->p_httpd_host );
631
632 free( p_sys->psz_sdp );
633
634 if( p_sys->psz_sdp_file != NULL )
635 {
636 #ifdef HAVE_UNISTD_H
637 unlink( p_sys->psz_sdp_file );
638 #endif
639 free( p_sys->psz_sdp_file );
640 }
641 free( p_sys->psz_destination );
642 free( p_sys );
643 }
644
645 /*****************************************************************************
646 * SDPHandleUrl:
647 *****************************************************************************/
648 static void SDPHandleUrl( sout_stream_t *p_stream, const char *psz_url )
649 {
650 sout_stream_sys_t *p_sys = p_stream->p_sys;
651 vlc_url_t url;
652
653 vlc_UrlParse( &url, psz_url, 0 );
654 if( url.psz_protocol && !strcasecmp( url.psz_protocol, "http" ) )
655 {
656 if( p_sys->p_httpd_file )
657 {
658 msg_Err( p_stream, "you can use sdp=http:// only once" );
659 goto out;
660 }
661
662 if( HttpSetup( p_stream, &url ) )
663 {
664 msg_Err( p_stream, "cannot export SDP as HTTP" );
665 }
666 }
667 else if( url.psz_protocol && !strcasecmp( url.psz_protocol, "rtsp" ) )
668 {
669 if( p_sys->rtsp != NULL )
670 {
671 msg_Err( p_stream, "you can use sdp=rtsp:// only once" );
672 goto out;
673 }
674
675 /* FIXME test if destination is multicast or no destination at all */
676 p_sys->rtsp = RtspSetup( p_stream, &url );
677 if( p_sys->rtsp == NULL )
678 msg_Err( p_stream, "cannot export SDP as RTSP" );
679 else
680 if( p_sys->p_mux != NULL )
681 {
682 sout_stream_id_t *id = p_sys->es[0];
683 rtsp_stream_id_t *rtsp_id = RtspAddId( p_sys->rtsp, id, GetDWBE( id->ssrc ),
684 p_sys->psz_destination, p_sys->i_ttl,
685 id->i_port, id->i_port + 1 );
686 vlc_mutex_lock( &p_sys->lock_es );
687 id->rtsp_id = rtsp_id;
688 vlc_mutex_unlock( &p_sys->lock_es );
689 }
690 }
691 else if( ( url.psz_protocol && !strcasecmp( url.psz_protocol, "sap" ) ) ||
692 ( url.psz_host && !strcasecmp( url.psz_host, "sap" ) ) )
693 {
694 p_sys->b_export_sap = true;
695 SapSetup( p_stream );
696 }
697 else if( url.psz_protocol && !strcasecmp( url.psz_protocol, "file" ) )
698 {
699 if( p_sys->psz_sdp_file != NULL )
700 {
701 msg_Err( p_stream, "you can use sdp=file:// only once" );
702 goto out;
703 }
704 p_sys->psz_sdp_file = make_path( psz_url );
705 if( p_sys->psz_sdp_file == NULL )
706 goto out;
707 FileSetup( p_stream );
708 }
709 else
710 {
711 msg_Warn( p_stream, "unknown protocol for SDP (%s)",
712 url.psz_protocol );
713 }
714
715 out:
716 vlc_UrlClean( &url );
717 }
718
719 /*****************************************************************************
720 * SDPGenerate
721 *****************************************************************************/
722 /*static*/
723 char *SDPGenerate( sout_stream_t *p_stream, const char *rtsp_url )
724 {
725 sout_stream_sys_t *p_sys = p_stream->p_sys;
726 char *psz_sdp = NULL;
727 struct sockaddr_storage dst;
728 socklen_t dstlen;
729 int i;
730 /*
731 * When we have a fixed destination (typically when we do multicast),
732 * we need to put the actual port numbers in the SDP.
733 * When there is no fixed destination, we only support RTSP unicast
734 * on-demand setup, so we should rather let the clients decide which ports
735 * to use.
736 * When there is both a fixed destination and RTSP unicast, we need to
737 * put port numbers used by the fixed destination, otherwise the SDP would
738 * become totally incorrect for multicast use. It should be noted that
739 * port numbers from SDP with RTSP are only "recommendation" from the
740 * server to the clients (per RFC2326), so only broken clients will fail
741 * to handle this properly. There is no solution but to use two differents
742 * output chain with two different RTSP URLs if you need to handle this
743 * scenario.
744 */
745 int inclport;
746
747 vlc_mutex_lock( &p_sys->lock_es );
748 if( unlikely(p_sys->i_es == 0 || (rtsp_url != NULL && !p_sys->es[0]->rtsp_id)) )
749 goto out; /* hmm... */
750
751 if( p_sys->psz_destination != NULL )
752 {
753 inclport = 1;
754
755 /* Oh boy, this is really ugly! */
756 dstlen = sizeof( dst );
757 if( p_sys->es[0]->listen.fd != NULL )
758 getsockname( p_sys->es[0]->listen.fd[0],
759 (struct sockaddr *)&dst, &dstlen );
760 else
761 getpeername( p_sys->es[0]->sinkv[0].rtp_fd,
762 (struct sockaddr *)&dst, &dstlen );
763 }
764 else
765 {
766 inclport = 0;
767
768 /* Check against URL format rtsp://[<ipv6>]:<port>/<path> */
769 bool ipv6 = rtsp_url != NULL && strlen( rtsp_url ) > 7
770 && rtsp_url[7] == '[';
771
772 /* Dummy destination address for RTSP */
773 dstlen = ipv6 ? sizeof( struct sockaddr_in6 )
774 : sizeof( struct sockaddr_in );
775 memset (&dst, 0, dstlen);
776 dst.ss_family = ipv6 ? AF_INET6 : AF_INET;
777 #ifdef HAVE_SA_LEN
778 dst.ss_len = dstlen;
779 #endif
780 }
781
782 psz_sdp = vlc_sdp_Start( VLC_OBJECT( p_stream ), SOUT_CFG_PREFIX,
783 NULL, 0, (struct sockaddr *)&dst, dstlen );
784 if( psz_sdp == NULL )
785 goto out;
786
787 /* TODO: a=source-filter */
788 if( p_sys->rtcp_mux )
789 sdp_AddAttribute( &psz_sdp, "rtcp-mux", NULL );
790
791 if( rtsp_url != NULL )
792 sdp_AddAttribute ( &psz_sdp, "control", "%s", rtsp_url );
793
794 const char *proto = "RTP/AVP"; /* protocol */
795 if( rtsp_url == NULL )
796 {
797 switch( p_sys->proto )
798 {
799 case IPPROTO_UDP:
800 break;
801 case IPPROTO_TCP:
802 proto = "TCP/RTP/AVP";
803 break;
804 case IPPROTO_DCCP:
805 proto = "DCCP/RTP/AVP";
806 break;
807 case IPPROTO_UDPLITE:
808 return psz_sdp;
809 }
810 }
811
812 for( i = 0; i < p_sys->i_es; i++ )
813 {
814 sout_stream_id_t *id = p_sys->es[i];
815 const char *mime_major; /* major MIME type */
816
817 switch( id->i_cat )
818 {
819 case VIDEO_ES:
820 mime_major = "video";
821 break;
822 case AUDIO_ES:
823 mime_major = "audio";
824 break;
825 case SPU_ES:
826 mime_major = "text";
827 break;
828 default:
829 continue;
830 }
831
832 sdp_AddMedia( &psz_sdp, mime_major, proto, inclport * id->i_port,
833 id->i_payload_type, false, id->i_bitrate,
834 id->psz_enc, id->i_clock_rate, id->i_channels,
835 id->psz_fmtp);
836
837 /* cf RFC4566 §5.14 */
838 if( inclport && !p_sys->rtcp_mux && (id->i_port & 1) )
839 sdp_AddAttribute ( &psz_sdp, "rtcp", "%u", id->i_port + 1 );
840
841 if( rtsp_url != NULL )
842 {
843 char *track_url = RtspAppendTrackPath( id->rtsp_id, rtsp_url );
844 if( track_url != NULL )
845 {
846 sdp_AddAttribute ( &psz_sdp, "control", "%s", track_url );
847 free( track_url );
848 }
849 }
850 else
851 {
852 if( id->listen.fd != NULL )
853 sdp_AddAttribute( &psz_sdp, "setup", "passive" );
854 if( p_sys->proto == IPPROTO_DCCP )
855 sdp_AddAttribute( &psz_sdp, "dccp-service-code",
856 "SC:RTP%c", toupper( mime_major[0] ) );
857 }
858 }
859 out:
860 vlc_mutex_unlock( &p_sys->lock_es );
861 return psz_sdp;
862 }
863
864 /*****************************************************************************
865 * RTP mux
866 *****************************************************************************/
867
868 static void sprintf_hexa( char *s, uint8_t *p_data, int i_data )
869 {
870 static const char hex[16] = "0123456789abcdef";
871
872 for( int i = 0; i < i_data; i++ )
873 {
874 s[2*i+0] = hex[(p_data[i]>>4)&0xf];
875 s[2*i+1] = hex[(p_data[i] )&0xf];
876 }
877 s[2*i_data] = '\0';
878 }
879
880 /**
881 * Shrink the MTU down to a fixed packetization time (for audio).
882 */
883 static void
884 rtp_set_ptime (sout_stream_id_t *id, unsigned ptime_ms, size_t bytes)
885 {
886 /* Samples per second */
887 size_t spl = (id->i_clock_rate - 1) * ptime_ms / 1000 + 1;
888 bytes *= id->i_channels;
889 spl *= bytes;
890
891 if (spl < rtp_mtu (id)) /* MTU is big enough for ptime */
892 id->i_mtu = 12 + spl;
893 else /* MTU is too small for ptime, align to a sample boundary */
894 id->i_mtu = 12 + (((id->i_mtu - 12) / bytes) * bytes);
895 }
896
897 uint32_t rtp_compute_ts( const sout_stream_id_t *id, int64_t i_pts )
898 {
899 /* NOTE: this plays nice with offsets because the calculations are
900 * linear. */
901 return i_pts * (int64_t)id->i_clock_rate / CLOCK_FREQ;
902 }
903
904 /** Add an ES as a new RTP stream */
905 static sout_stream_id_t *Add( sout_stream_t *p_stream, es_format_t *p_fmt )
906 {
907 /* NOTE: As a special case, if we use a non-RTP
908 * mux (TS/PS), then p_fmt is NULL. */
909 sout_stream_sys_t *p_sys = p_stream->p_sys;
910 char *psz_sdp;
911
912 if (0 == p_sys->payload_bitmap)
913 {
914 msg_Err (p_stream, "too many RTP elementary streams");
915 return NULL;
916 }
917
918 sout_stream_id_t *id = malloc( sizeof( *id ) );
919 if( unlikely(id == NULL) )
920 return NULL;
921 id->p_stream = p_stream;
922
923 /* Look for free dymanic payload type */
924 id->i_payload_type = 96 + clz32 (p_sys->payload_bitmap);
925 assert (id->i_payload_type < 128);
926
927 vlc_rand_bytes (&id->i_sequence, sizeof (id->i_sequence));
928 vlc_rand_bytes (id->ssrc, sizeof (id->ssrc));
929
930 id->psz_enc = NULL;
931 id->psz_fmtp = NULL;
932 id->i_clock_rate = 90000; /* most common case for video */
933 id->i_channels = 0;
934 if( p_fmt != NULL )
935 {
936 id->i_cat = p_fmt->i_cat;
937 if( p_fmt->i_cat == AUDIO_ES )
938 {
939 id->i_clock_rate = p_fmt->audio.i_rate;
940 id->i_channels = p_fmt->audio.i_channels;
941 }
942 id->i_bitrate = p_fmt->i_bitrate/1000; /* Stream bitrate in kbps */
943 }
944 else
945 {
946 id->i_cat = VIDEO_ES;
947 id->i_bitrate = 0;
948 }
949
950 id->i_mtu = var_InheritInteger( p_stream, "mtu" );
951 if( id->i_mtu <= 12 + 16 )
952 id->i_mtu = 576 - 20 - 8; /* pessimistic */
953 msg_Dbg( p_stream, "maximum RTP packet size: %d bytes", id->i_mtu );
954
955 id->pf_packetize = NULL;
956
957 #ifdef HAVE_SRTP
958 id->srtp = NULL;
959 #endif
960 vlc_mutex_init( &id->lock_sink );
961 id->sinkc = 0;
962 id->sinkv = NULL;
963 id->rtsp_id = NULL;
964 id->p_fifo = NULL;
965 id->listen.fd = NULL;
966
967 id->i_caching =
968 (int64_t)1000 * var_GetInteger( p_stream, SOUT_CFG_PREFIX "caching");
969
970 #ifdef HAVE_SRTP
971 char *key = var_CreateGetNonEmptyString (p_stream, SOUT_CFG_PREFIX"key");
972 if (key)
973 {
974 id->srtp = srtp_create (SRTP_ENCR_AES_CM, SRTP_AUTH_HMAC_SHA1, 10,
975 SRTP_PRF_AES_CM, SRTP_RCC_MODE1);
976 if (id->srtp == NULL)
977 {
978 free (key);
979 goto error;
980 }
981
982 char *salt = var_CreateGetNonEmptyString (p_stream, SOUT_CFG_PREFIX"salt");
983 errno = srtp_setkeystring (id->srtp, key, salt ? salt : "");
984 free (salt);
985 free (key);
986 if (errno)
987 {
988 msg_Err (p_stream, "bad SRTP key/salt combination (%m)");
989 goto error;
990 }
991 id->i_sequence = 0; /* FIXME: awful hack for libvlc_srtp */
992 }
993 #endif
994
995 id->i_seq_sent_next = id->i_sequence;
996
997 if( p_sys->psz_destination != NULL )
998 {
999 /* Choose the port */
1000 uint16_t i_port = 0;
1001 if( p_fmt == NULL )
1002 ;
1003 else
1004 if( p_fmt->i_cat == AUDIO_ES && p_sys->i_port_audio > 0 )
1005 i_port = p_sys->i_port_audio;
1006 else
1007 if( p_fmt->i_cat == VIDEO_ES && p_sys->i_port_video > 0 )
1008 i_port = p_sys->i_port_video;
1009
1010 /* We do not need the ES lock (p_sys->lock_es) here, because
1011 * this is the only one thread that can *modify* the ES table.
1012 * The ES lock protects the other threads from our modifications
1013 * (TAB_APPEND, TAB_REMOVE). */
1014 for (int i = 0; i_port && (i < p_sys->i_es); i++)
1015 if (i_port == p_sys->es[i]->i_port)
1016 i_port = 0; /* Port already in use! */
1017 for (uint16_t p = p_sys->i_port; i_port == 0; p += 2)
1018 {
1019 if (p == 0)
1020 {
1021 msg_Err (p_stream, "too many RTP elementary streams");
1022 goto error;
1023 }
1024 i_port = p;
1025 for (int i = 0; i_port && (i < p_sys->i_es); i++)
1026 if (p == p_sys->es[i]->i_port)
1027 i_port = 0;
1028 }
1029
1030 id->i_port = i_port;
1031
1032 int type = SOCK_STREAM;
1033
1034 switch( p_sys->proto )
1035 {
1036 #ifdef SOCK_DCCP
1037 case IPPROTO_DCCP:
1038 {
1039 const char *code;
1040 switch (id->i_cat)
1041 {
1042 case VIDEO_ES: code = "RTPV"; break;
1043 case AUDIO_ES: code = "RTPARTPV"; break;
1044 case SPU_ES: code = "RTPTRTPV"; break;
1045 default: code = "RTPORTPV"; break;
1046 }
1047 var_SetString (p_stream, "dccp-service", code);
1048 type = SOCK_DCCP;
1049 } /* fall through */
1050 #endif
1051 case IPPROTO_TCP:
1052 id->listen.fd = net_Listen( VLC_OBJECT(p_stream),
1053 p_sys->psz_destination, i_port,
1054 type, p_sys->proto );
1055 if( id->listen.fd == NULL )
1056 {
1057 msg_Err( p_stream, "passive COMEDIA RTP socket failed" );
1058 goto error;
1059 }
1060 if( vlc_clone( &id->listen.thread, rtp_listen_thread, id,
1061 VLC_THREAD_PRIORITY_LOW ) )
1062 {
1063 net_ListenClose( id->listen.fd );
1064 id->listen.fd = NULL;
1065 goto error;
1066 }
1067 break;
1068
1069 default:
1070 {
1071 int ttl = (p_sys->i_ttl >= 0) ? p_sys->i_ttl : -1;
1072 int fd = net_ConnectDgram( p_stream, p_sys->psz_destination,
1073 i_port, ttl, p_sys->proto );
1074 if( fd == -1 )
1075 {
1076 msg_Err( p_stream, "cannot create RTP socket" );
1077 goto error;
1078 }
1079 /* Ignore any unexpected incoming packet (including RTCP-RR
1080 * packets in case of rtcp-mux) */
1081 setsockopt (fd, SOL_SOCKET, SO_RCVBUF, &(int){ 0 },
1082 sizeof (int));
1083 rtp_add_sink( id, fd, p_sys->rtcp_mux, NULL );
1084 }
1085 }
1086 }
1087
1088 if( p_fmt == NULL )
1089 {
1090 char *psz = var_GetNonEmptyString( p_stream, SOUT_CFG_PREFIX "mux" );
1091
1092 if( psz == NULL ) /* Uho! */
1093 ;
1094 else
1095 if( strncmp( psz, "ts", 2 ) == 0 )
1096 {
1097 id->i_payload_type = 33;
1098 id->psz_enc = "MP2T";
1099 }
1100 else
1101 {
1102 id->psz_enc = "MP2P";
1103 }
1104 free( psz );
1105 }
1106 else
1107 switch( p_fmt->i_codec )
1108 {
1109 case VLC_CODEC_MULAW:
1110 if( p_fmt->audio.i_channels == 1 && p_fmt->audio.i_rate == 8000 )
1111 id->i_payload_type = 0;
1112 id->psz_enc = "PCMU";
1113 id->pf_packetize = rtp_packetize_split;
1114 rtp_set_ptime (id, 20, 1);
1115 break;
1116 case VLC_CODEC_ALAW:
1117 if( p_fmt->audio.i_channels == 1 && p_fmt->audio.i_rate == 8000 )
1118 id->i_payload_type = 8;
1119 id->psz_enc = "PCMA";
1120 id->pf_packetize = rtp_packetize_split;
1121 rtp_set_ptime (id, 20, 1);
1122 break;
1123 case VLC_CODEC_S16B:
1124 case VLC_CODEC_S16L:
1125 if( p_fmt->audio.i_channels == 1 && p_fmt->audio.i_rate == 44100 )
1126 {
1127 id->i_payload_type = 11;
1128 }
1129 else if( p_fmt->audio.i_channels == 2 &&
1130 p_fmt->audio.i_rate == 44100 )
1131 {
1132 id->i_payload_type = 10;
1133 }
1134 id->psz_enc = "L16";
1135 if( p_fmt->i_codec == VLC_CODEC_S16B )
1136 id->pf_packetize = rtp_packetize_split;
1137 else
1138 id->pf_packetize = rtp_packetize_swab;
1139 rtp_set_ptime (id, 20, 2);
1140 break;
1141 case VLC_CODEC_U8:
1142 id->psz_enc = "L8";
1143 id->pf_packetize = rtp_packetize_split;
1144 rtp_set_ptime (id, 20, 1);
1145 break;
1146 case VLC_CODEC_MPGA:
1147 id->i_payload_type = 14;
1148 id->psz_enc = "MPA";
1149 id->i_clock_rate = 90000; /* not 44100 */
1150 id->pf_packetize = rtp_packetize_mpa;
1151 break;
1152 case VLC_CODEC_MPGV:
1153 id->i_payload_type = 32;
1154 id->psz_enc = "MPV";
1155 id->pf_packetize = rtp_packetize_mpv;
1156 break;
1157 case VLC_CODEC_ADPCM_G726:
1158 switch( p_fmt->i_bitrate / 1000 )
1159 {
1160 case 16:
1161 id->psz_enc = "G726-16";
1162 id->pf_packetize = rtp_packetize_g726_16;
1163 break;
1164 case 24:
1165 id->psz_enc = "G726-24";
1166 id->pf_packetize = rtp_packetize_g726_24;
1167 break;
1168 case 32:
1169 id->psz_enc = "G726-32";
1170 id->pf_packetize = rtp_packetize_g726_32;
1171 break;
1172 case 40:
1173 id->psz_enc = "G726-40";
1174 id->pf_packetize = rtp_packetize_g726_40;
1175 break;
1176 default:
1177 msg_Err( p_stream, "cannot add this stream (unsupported "
1178 "G.726 bit rate: %u)", p_fmt->i_bitrate );
1179 goto error;
1180 }
1181 break;
1182 case VLC_CODEC_A52:
1183 id->psz_enc = "ac3";
1184 id->pf_packetize = rtp_packetize_ac3;
1185 break;
1186 case VLC_CODEC_H263:
1187 id->psz_enc = "H263-1998";
1188 id->pf_packetize = rtp_packetize_h263;
1189 break;
1190 case VLC_CODEC_H264:
1191 id->psz_enc = "H264";
1192 id->pf_packetize = rtp_packetize_h264;
1193 id->psz_fmtp = NULL;
1194
1195 if( p_fmt->i_extra > 0 )
1196 {
1197 uint8_t *p_buffer = p_fmt->p_extra;
1198 int i_buffer = p_fmt->i_extra;
1199 char *p_64_sps = NULL;
1200 char *p_64_pps = NULL;
1201 char hexa[6+1];
1202
1203 while( i_buffer > 4 )
1204 {
1205 int i_offset = 0;
1206 int i_size = 0;
1207
1208 while( p_buffer[0] != 0 || p_buffer[1] != 0 ||
1209 p_buffer[2] != 1 )
1210 {
1211 p_buffer++;
1212 i_buffer--;
1213 if( i_buffer == 0 ) break;
1214 }
1215
1216 if( i_buffer < 4 || memcmp(p_buffer, "\x00\x00\x01", 3 ) )
1217 {
1218 msg_Dbg( p_stream, "No startcode found..");
1219 break;
1220 }
1221 p_buffer += 3;
1222 i_buffer -= 3;
1223
1224 const int i_nal_type = p_buffer[0]&0x1f;
1225
1226 msg_Dbg( p_stream, "we found a startcode for NAL with TYPE:%d", i_nal_type );
1227
1228 i_size = i_buffer;
1229 for( i_offset = 0; i_offset+2 < i_buffer ; i_offset++)
1230 {
1231 if( !memcmp(p_buffer + i_offset, "\x00\x00\x01", 3 ) )
1232 {
1233 /* we found another startcode */
1234 while( i_offset > 0 && 0 == p_buffer[ i_offset - 1 ] )
1235 i_offset--;
1236 i_size = i_offset;
1237 break;
1238 }
1239 }
1240
1241 if( i_size == 0 )
1242 {
1243 msg_Dbg( p_stream, "No-info found in nal ");
1244 continue;
1245 }
1246
1247 if( i_nal_type == 7 )
1248 {
1249 free( p_64_sps );
1250 p_64_sps = vlc_b64_encode_binary( p_buffer, i_size );
1251 /* XXX: nothing ensures that i_size >= 4 ?? */
1252 sprintf_hexa( hexa, &p_buffer[1], 3 );
1253 }
1254 else if( i_nal_type == 8 )
1255 {
1256 free( p_64_pps );
1257 p_64_pps = vlc_b64_encode_binary( p_buffer, i_size );
1258 }
1259 i_buffer -= i_size;
1260 p_buffer += i_size;
1261 }
1262 /* */
1263 if( p_64_sps && p_64_pps &&
1264 ( asprintf( &id->psz_fmtp,
1265 "packetization-mode=1;profile-level-id=%s;"
1266 "sprop-parameter-sets=%s,%s;", hexa, p_64_sps,
1267 p_64_pps ) == -1 ) )
1268 id->psz_fmtp = NULL;
1269 free( p_64_sps );
1270 free( p_64_pps );
1271 }
1272 if( !id->psz_fmtp )
1273 id->psz_fmtp = strdup( "packetization-mode=1" );
1274 break;
1275
1276 case VLC_CODEC_MP4V:
1277 {
1278 id->psz_enc = "MP4V-ES";
1279 id->pf_packetize = rtp_packetize_split;
1280 if( p_fmt->i_extra > 0 )
1281 {
1282 char hexa[2*p_fmt->i_extra +1];
1283 sprintf_hexa( hexa, p_fmt->p_extra, p_fmt->i_extra );
1284 if( asprintf( &id->psz_fmtp,
1285 "profile-level-id=3; config=%s;", hexa ) == -1 )
1286 id->psz_fmtp = NULL;
1287 }
1288 break;
1289 }
1290 case VLC_CODEC_MP4A:
1291 {
1292 if(!p_sys->b_latm)
1293 {
1294 char hexa[2*p_fmt->i_extra +1];
1295
1296 id->psz_enc = "mpeg4-generic";
1297 id->pf_packetize = rtp_packetize_mp4a;
1298 sprintf_hexa( hexa, p_fmt->p_extra, p_fmt->i_extra );
1299 if( asprintf( &id->psz_fmtp,
1300 "streamtype=5; profile-level-id=15; "
1301 "mode=AAC-hbr; config=%s; SizeLength=13; "
1302 "IndexLength=3; IndexDeltaLength=3; Profile=1;",
1303 hexa ) == -1 )
1304 id->psz_fmtp = NULL;
1305 }
1306 else
1307 {
1308 char hexa[13];
1309 int i;
1310 unsigned char config[6];
1311 unsigned int aacsrates[15] = {
1312 96000, 88200, 64000, 48000, 44100, 32000, 24000, 22050,
1313 16000, 12000, 11025, 8000, 7350, 0, 0 };
1314
1315 for( i = 0; i < 15; i++ )
1316 if( p_fmt->audio.i_rate == aacsrates[i] )
1317 break;
1318
1319 config[0]=0x40;
1320 config[1]=0;
1321 config[2]=0x20|i;
1322 config[3]=p_fmt->audio.i_channels<<4;
1323 config[4]=0x3f;
1324 config[5]=0xc0;
1325
1326 id->psz_enc = "MP4A-LATM";
1327 id->pf_packetize = rtp_packetize_mp4a_latm;
1328 sprintf_hexa( hexa, config, 6 );
1329 if( asprintf( &id->psz_fmtp, "profile-level-id=15; "
1330 "object=2; cpresent=0; config=%s", hexa ) == -1 )
1331 id->psz_fmtp = NULL;
1332 }
1333 break;
1334 }
1335 case VLC_CODEC_AMR_NB:
1336 id->psz_enc = "AMR";
1337 id->psz_fmtp = strdup( "octet-align=1" );
1338 id->pf_packetize = rtp_packetize_amr;
1339 break;
1340 case VLC_CODEC_AMR_WB:
1341 id->psz_enc = "AMR-WB";
1342 id->psz_fmtp = strdup( "octet-align=1" );
1343 id->pf_packetize = rtp_packetize_amr;
1344 break;
1345 case VLC_CODEC_SPEEX:
1346 id->psz_enc = "SPEEX";
1347 id->pf_packetize = rtp_packetize_spx;
1348 break;
1349 case VLC_CODEC_ITU_T140:
1350 id->psz_enc = "t140" ;
1351 id->i_clock_rate = 1000;
1352 id->pf_packetize = rtp_packetize_t140;
1353 break;
1354
1355 default:
1356 msg_Err( p_stream, "cannot add this stream (unsupported "
1357 "codec: %4.4s)", (char*)&p_fmt->i_codec );
1358 goto error;
1359 }
1360 if (id->i_payload_type >= 96)
1361 /* Mark dynamic payload type in use */
1362 p_sys->payload_bitmap &= ~(1 << (127 - id->i_payload_type));
1363
1364 #if 0 /* No payload formats sets this at the moment */
1365 int cscov = -1;
1366 if( cscov != -1 )
1367 cscov += 8 /* UDP */ + 12 /* RTP */;
1368 if( id->sinkc > 0 )
1369 net_SetCSCov( id->sinkv[0].rtp_fd, cscov, -1 );
1370 #endif
1371
1372 vlc_mutex_lock( &p_sys->lock_ts );
1373 id->b_ts_init = ( p_sys->i_npt_zero != VLC_TS_INVALID );
1374 vlc_mutex_unlock( &p_sys->lock_ts );
1375 if( id->b_ts_init )
1376 id->i_ts_offset = rtp_compute_ts( id, p_sys->i_pts_offset );
1377
1378 if( p_sys->rtsp != NULL )
1379 id->rtsp_id = RtspAddId( p_sys->rtsp, id,
1380 GetDWBE( id->ssrc ),
1381 p_sys->psz_destination,
1382 p_sys->i_ttl, id->i_port, id->i_port + 1 );
1383
1384 id->p_fifo = block_FifoNew();
1385 if( unlikely(id->p_fifo == NULL) )
1386 goto error;
1387 if( vlc_clone( &id->thread, ThreadSend, id, VLC_THREAD_PRIORITY_HIGHEST ) )
1388 {
1389 block_FifoRelease( id->p_fifo );
1390 id->p_fifo = NULL;
1391 goto error;
1392 }
1393
1394 /* Update p_sys context */
1395 vlc_mutex_lock( &p_sys->lock_es );
1396 TAB_APPEND( p_sys->i_es, p_sys->es, id );
1397 vlc_mutex_unlock( &p_sys->lock_es );
1398
1399 psz_sdp = SDPGenerate( p_stream, NULL );
1400
1401 vlc_mutex_lock( &p_sys->lock_sdp );
1402 free( p_sys->psz_sdp );
1403 p_sys->psz_sdp = psz_sdp;
1404 vlc_mutex_unlock( &p_sys->lock_sdp );
1405
1406 msg_Dbg( p_stream, "sdp=\n%s", p_sys->psz_sdp );
1407
1408 /* Update SDP (sap/file) */
1409 if( p_sys->b_export_sap ) SapSetup( p_stream );
1410 if( p_sys->psz_sdp_file != NULL ) FileSetup( p_stream );
1411
1412 return id;
1413
1414 error:
1415 Del( p_stream, id );
1416 return NULL;
1417 }
1418
1419 static int Del( sout_stream_t *p_stream, sout_stream_id_t *id )
1420 {
1421 sout_stream_sys_t *p_sys = p_stream->p_sys;
1422
1423 vlc_mutex_lock( &p_sys->lock_es );
1424 TAB_REMOVE( p_sys->i_es, p_sys->es, id );
1425 vlc_mutex_unlock( &p_sys->lock_es );
1426
1427 if( likely(id->p_fifo != NULL) )
1428 {
1429 vlc_cancel( id->thread );
1430 vlc_join( id->thread, NULL );
1431 block_FifoRelease( id->p_fifo );
1432 }
1433
1434 /* Release dynamic payload type */
1435 if (id->i_payload_type >= 96)
1436 p_sys->payload_bitmap |= 1 << (127 - id->i_payload_type);
1437
1438 free( id->psz_fmtp );
1439
1440 if( id->rtsp_id )
1441 RtspDelId( p_sys->rtsp, id->rtsp_id );
1442 if( id->listen.fd != NULL )
1443 {
1444 vlc_cancel( id->listen.thread );
1445 vlc_join( id->listen.thread, NULL );
1446 net_ListenClose( id->listen.fd );
1447 }
1448 /* Delete remaining sinks (incoming connections or explicit
1449 * outgoing dst=) */
1450 while( id->sinkc > 0 )
1451 rtp_del_sink( id, id->sinkv[0].rtp_fd );
1452 #ifdef HAVE_SRTP
1453 if( id->srtp != NULL )
1454 srtp_destroy( id->srtp );
1455 #endif
1456
1457 vlc_mutex_destroy( &id->lock_sink );
1458
1459 /* Update SDP (sap/file) */
1460 if( p_sys->b_export_sap && !p_sys->p_mux ) SapSetup( p_stream );
1461 if( p_sys->psz_sdp_file != NULL ) FileSetup( p_stream );
1462
1463 free( id );
1464 return VLC_SUCCESS;
1465 }
1466
1467 static int Send( sout_stream_t *p_stream, sout_stream_id_t *id,
1468 block_t *p_buffer )
1469 {
1470 block_t *p_next;
1471
1472 assert( p_stream->p_sys->p_mux == NULL );
1473 (void)p_stream;
1474
1475 while( p_buffer != NULL )
1476 {
1477 p_next = p_buffer->p_next;
1478 if( id->pf_packetize( id, p_buffer ) )
1479 break;
1480
1481 block_Release( p_buffer );
1482 p_buffer = p_next;
1483 }
1484 return VLC_SUCCESS;
1485 }
1486
1487 /****************************************************************************
1488 * SAP:
1489 ****************************************************************************/
1490 static int SapSetup( sout_stream_t *p_stream )
1491 {
1492 sout_stream_sys_t *p_sys = p_stream->p_sys;
1493 sout_instance_t *p_sout = p_stream->p_sout;
1494
1495 /* Remove the previous session */
1496 if( p_sys->p_session != NULL)
1497 {
1498 sout_AnnounceUnRegister( p_sout, p_sys->p_session);
1499 p_sys->p_session = NULL;
1500 }
1501
1502 if( ( p_sys->i_es > 0 || p_sys->p_mux ) && p_sys->psz_sdp && *p_sys->psz_sdp )
1503 {
1504 announce_method_t *p_method = sout_SAPMethod();
1505 p_sys->p_session = sout_AnnounceRegisterSDP( p_sout,
1506 p_sys->psz_sdp,
1507 p_sys->psz_destination,
1508 p_method );
1509 sout_MethodRelease( p_method );
1510 }
1511
1512 return VLC_SUCCESS;
1513 }
1514
1515 /****************************************************************************
1516 * File:
1517 ****************************************************************************/
1518 static int FileSetup( sout_stream_t *p_stream )
1519 {
1520 sout_stream_sys_t *p_sys = p_stream->p_sys;
1521 FILE *f;
1522
1523 if( p_sys->psz_sdp == NULL )
1524 return VLC_EGENERIC; /* too early */
1525
1526 if( ( f = vlc_fopen( p_sys->psz_sdp_file, "wt" ) ) == NULL )
1527 {
1528 msg_Err( p_stream, "cannot open file '%s' (%m)",
1529 p_sys->psz_sdp_file );
1530 return VLC_EGENERIC;
1531 }
1532
1533 fputs( p_sys->psz_sdp, f );
1534 fclose( f );
1535
1536 return VLC_SUCCESS;
1537 }
1538
1539 /****************************************************************************
1540 * HTTP:
1541 ****************************************************************************/
1542 static int HttpCallback( httpd_file_sys_t *p_args,
1543 httpd_file_t *, uint8_t *p_request,
1544 uint8_t **pp_data, int *pi_data );
1545
1546 static int HttpSetup( sout_stream_t *p_stream, const vlc_url_t *url)
1547 {
1548 sout_stream_sys_t *p_sys = p_stream->p_sys;
1549
1550 p_sys->p_httpd_host = httpd_HostNew( VLC_OBJECT(p_stream), url->psz_host,
1551 url->i_port > 0 ? url->i_port : 80 );
1552 if( p_sys->p_httpd_host )
1553 {
1554 p_sys->p_httpd_file = httpd_FileNew( p_sys->p_httpd_host,
1555 url->psz_path ? url->psz_path : "/",
1556 "application/sdp",
1557 NULL, NULL, NULL,
1558 HttpCallback, (void*)p_sys );
1559 }
1560 if( p_sys->p_httpd_file == NULL )
1561 {
1562 return VLC_EGENERIC;
1563 }
1564 return VLC_SUCCESS;
1565 }
1566
1567 static int HttpCallback( httpd_file_sys_t *p_args,
1568 httpd_file_t *f, uint8_t *p_request,
1569 uint8_t **pp_data, int *pi_data )
1570 {
1571 VLC_UNUSED(f); VLC_UNUSED(p_request);
1572 sout_stream_sys_t *p_sys = (sout_stream_sys_t*)p_args;
1573
1574 vlc_mutex_lock( &p_sys->lock_sdp );
1575 if( p_sys->psz_sdp && *p_sys->psz_sdp )
1576 {
1577 *pi_data = strlen( p_sys->psz_sdp );
1578 *pp_data = malloc( *pi_data );
1579 memcpy( *pp_data, p_sys->psz_sdp, *pi_data );
1580 }
1581 else
1582 {
1583 *pp_data = NULL;
1584 *pi_data = 0;
1585 }
1586 vlc_mutex_unlock( &p_sys->lock_sdp );
1587
1588 return VLC_SUCCESS;
1589 }
1590
1591 /****************************************************************************
1592 * RTP send
1593 ****************************************************************************/
1594 static void* ThreadSend( void *data )
1595 {
1596 #ifdef WIN32
1597 # define ECONNREFUSED WSAECONNREFUSED
1598 # define ENOPROTOOPT WSAENOPROTOOPT
1599 # define EHOSTUNREACH WSAEHOSTUNREACH
1600 # define ENETUNREACH WSAENETUNREACH
1601 # define ENETDOWN WSAENETDOWN
1602 # define ENOBUFS WSAENOBUFS
1603 # define EAGAIN WSAEWOULDBLOCK
1604 # define EWOULDBLOCK WSAEWOULDBLOCK
1605 #endif
1606 sout_stream_id_t *id = data;
1607 unsigned i_caching = id->i_caching;
1608
1609 for (;;)
1610 {
1611 block_t *out = block_FifoGet( id->p_fifo );
1612 block_cleanup_push (out);
1613
1614 #ifdef HAVE_SRTP
1615 if( id->srtp )
1616 { /* FIXME: this is awfully inefficient */
1617 size_t len = out->i_buffer;
1618 out = block_Realloc( out, 0, len + 10 );
1619 out->i_buffer = len;
1620
1621 int canc = vlc_savecancel ();
1622 int val = srtp_send( id->srtp, out->p_buffer, &len, len + 10 );
1623 vlc_restorecancel (canc);
1624 if( val )
1625 {
1626 errno = val;
1627 msg_Dbg( id->p_stream, "SRTP sending error: %m" );
1628 block_Release( out );
1629 out = NULL;
1630 }
1631 else
1632 out->i_buffer = len;
1633 }
1634 if (out)
1635 #endif
1636 mwait (out->i_dts + i_caching);
1637 vlc_cleanup_pop ();
1638 if (out == NULL)
1639 continue;
1640
1641 ssize_t len = out->i_buffer;
1642 int canc = vlc_savecancel ();
1643
1644 vlc_mutex_lock( &id->lock_sink );
1645 unsigned deadc = 0; /* How many dead sockets? */
1646 int deadv[id->sinkc]; /* Dead sockets list */
1647
1648 for( int i = 0; i < id->sinkc; i++ )
1649 {
1650 #ifdef HAVE_SRTP
1651 if( !id->srtp ) /* FIXME: SRTCP support */
1652 #endif
1653 SendRTCP( id->sinkv[i].rtcp, out );
1654
1655 if( send( id->sinkv[i].rtp_fd, out->p_buffer, len, 0 ) >= 0 )
1656 continue;
1657 switch( net_errno )
1658 {
1659 /* Soft errors (e.g. ICMP): */
1660 case ECONNREFUSED: /* Port unreachable */
1661 case ENOPROTOOPT:
1662 #ifdef EPROTO
1663 case EPROTO: /* Protocol unreachable */
1664 #endif
1665 case EHOSTUNREACH: /* Host unreachable */
1666 case ENETUNREACH: /* Network unreachable */
1667 case ENETDOWN: /* Entire network down */
1668 send( id->sinkv[i].rtp_fd, out->p_buffer, len, 0 );
1669 /* Transient congestion: */
1670 case ENOMEM: /* out of socket buffers */
1671 case ENOBUFS:
1672 case EAGAIN:
1673 #if (EAGAIN != EWOULDBLOCK)
1674 case EWOULDBLOCK:
1675 #endif
1676 continue;
1677 }
1678
1679 deadv[deadc++] = id->sinkv[i].rtp_fd;
1680 }
1681 id->i_seq_sent_next = ntohs(((uint16_t *) out->p_buffer)[1]) + 1;
1682 vlc_mutex_unlock( &id->lock_sink );
1683 block_Release( out );
1684
1685 for( unsigned i = 0; i < deadc; i++ )
1686 {
1687 msg_Dbg( id->p_stream, "removing socket %d", deadv[i] );
1688 rtp_del_sink( id, deadv[i] );
1689 }
1690 vlc_restorecancel (canc);
1691 }
1692 return NULL;
1693 }
1694
1695
1696 /* This thread dequeues incoming connections (DCCP streaming) */
1697 static void *rtp_listen_thread( void *data )
1698 {
1699 sout_stream_id_t *id = data;
1700
1701 assert( id->listen.fd != NULL );
1702
1703 for( ;; )
1704 {
1705 int fd = net_Accept( id->p_stream, id->listen.fd );
1706 if( fd == -1 )
1707 continue;
1708 int canc = vlc_savecancel( );
1709 rtp_add_sink( id, fd, true, NULL );
1710 vlc_restorecancel( canc );
1711 }
1712
1713 assert( 0 );
1714 }
1715
1716
1717 int rtp_add_sink( sout_stream_id_t *id, int fd, bool rtcp_mux, uint16_t *seq )
1718 {
1719 rtp_sink_t sink = { fd, NULL };
1720 sink.rtcp = OpenRTCP( VLC_OBJECT( id->p_stream ), fd, IPPROTO_UDP,
1721 rtcp_mux );
1722 if( sink.rtcp == NULL )
1723 msg_Err( id->p_stream, "RTCP failed!" );
1724
1725 vlc_mutex_lock( &id->lock_sink );
1726 INSERT_ELEM( id->sinkv, id->sinkc, id->sinkc, sink );
1727 if( seq != NULL )
1728 *seq = id->i_seq_sent_next;
1729 vlc_mutex_unlock( &id->lock_sink );
1730 return VLC_SUCCESS;
1731 }
1732
1733 void rtp_del_sink( sout_stream_id_t *id, int fd )
1734 {
1735 rtp_sink_t sink = { fd, NULL };
1736
1737 /* NOTE: must be safe to use if fd is not included */
1738 vlc_mutex_lock( &id->lock_sink );
1739 for( int i = 0; i < id->sinkc; i++ )
1740 {
1741 if (id->sinkv[i].rtp_fd == fd)
1742 {
1743 sink = id->sinkv[i];
1744 REMOVE_ELEM( id->sinkv, id->sinkc, i );
1745 break;
1746 }
1747 }
1748 vlc_mutex_unlock( &id->lock_sink );
1749
1750 CloseRTCP( sink.rtcp );
1751 net_Close( sink.rtp_fd );
1752 }
1753
1754 uint16_t rtp_get_seq( sout_stream_id_t *id )
1755 {
1756 /* This will return values for the next packet. */
1757 uint16_t seq;
1758
1759 vlc_mutex_lock( &id->lock_sink );
1760 seq = id->i_seq_sent_next;
1761 vlc_mutex_unlock( &id->lock_sink );
1762
1763 return seq;
1764 }
1765
1766 /* Return a timestamp corresponding to packets being sent now, and that
1767 * can be passed to rtp_compute_ts() to get rtptime values for each ES. */
1768 int64_t rtp_get_ts( const sout_stream_t *p_stream )
1769 {
1770 sout_stream_sys_t *p_sys = p_stream->p_sys;
1771 mtime_t i_npt_zero;
1772 vlc_mutex_lock( &p_sys->lock_ts );
1773 i_npt_zero = p_sys->i_npt_zero;
1774 vlc_mutex_unlock( &p_sys->lock_ts );
1775
1776 if( i_npt_zero == VLC_TS_INVALID )
1777 return p_sys->i_pts_zero;
1778
1779 mtime_t now = mdate();
1780 if( now < i_npt_zero )
1781 return p_sys->i_pts_zero;
1782
1783 return p_sys->i_pts_zero + (now - i_npt_zero);
1784 }
1785
1786 void rtp_packetize_common( sout_stream_id_t *id, block_t *out,
1787 int b_marker, int64_t i_pts )
1788 {
1789 if( !id->b_ts_init )
1790 {
1791 sout_stream_sys_t *p_sys = id->p_stream->p_sys;
1792 vlc_mutex_lock( &p_sys->lock_ts );
1793 if( p_sys->i_npt_zero == VLC_TS_INVALID )
1794 {
1795 /* This is the first packet of any ES. We initialize the
1796 * NPT=0 time reference, and the offset to match the
1797 * arbitrary PTS reference. */
1798 p_sys->i_npt_zero = i_pts + id->i_caching;
1799 p_sys->i_pts_offset = p_sys->i_pts_zero - i_pts;
1800 }
1801 vlc_mutex_unlock( &p_sys->lock_ts );
1802
1803 /* And in any case this is the first packet of this ES, so we
1804 * initialize the offset for this ES. */
1805 id->i_ts_offset = rtp_compute_ts( id, p_sys->i_pts_offset );
1806 id->b_ts_init = true;
1807 }
1808
1809 uint32_t i_timestamp = rtp_compute_ts( id, i_pts ) + id->i_ts_offset;
1810
1811 out->p_buffer[0] = 0x80;
1812 out->p_buffer[1] = (b_marker?0x80:0x00)|id->i_payload_type;
1813 out->p_buffer[2] = ( id->i_sequence >> 8)&0xff;
1814 out->p_buffer[3] = ( id->i_sequence )&0xff;
1815 out->p_buffer[4] = ( i_timestamp >> 24 )&0xff;
1816 out->p_buffer[5] = ( i_timestamp >> 16 )&0xff;
1817 out->p_buffer[6] = ( i_timestamp >> 8 )&0xff;
1818 out->p_buffer[7] = ( i_timestamp )&0xff;
1819
1820 memcpy( out->p_buffer + 8, id->ssrc, 4 );
1821
1822 out->i_buffer = 12;
1823 id->i_sequence++;
1824 }
1825
1826 void rtp_packetize_send( sout_stream_id_t *id, block_t *out )
1827 {
1828 block_FifoPut( id->p_fifo, out );
1829 }
1830
1831 /**
1832 * @return configured max RTP payload size (including payload type-specific
1833 * headers, excluding RTP and transport headers)
1834 */
1835 size_t rtp_mtu (const sout_stream_id_t *id)
1836 {
1837 return id->i_mtu - 12;
1838 }
1839
1840 /*****************************************************************************
1841 * Non-RTP mux
1842 *****************************************************************************/
1843
1844 /** Add an ES to a non-RTP muxed stream */
1845 static sout_stream_id_t *MuxAdd( sout_stream_t *p_stream, es_format_t *p_fmt )
1846 {
1847 sout_input_t *p_input;
1848 sout_mux_t *p_mux = p_stream->p_sys->p_mux;
1849 assert( p_mux != NULL );
1850
1851 p_input = sout_MuxAddStream( p_mux, p_fmt );
1852 if( p_input == NULL )
1853 {
1854 msg_Err( p_stream, "cannot add this stream to the muxer" );
1855 return NULL;
1856 }
1857
1858 return (sout_stream_id_t *)p_input;
1859 }
1860
1861
1862 static int MuxSend( sout_stream_t *p_stream, sout_stream_id_t *id,
1863 block_t *p_buffer )
1864 {
1865 sout_mux_t *p_mux = p_stream->p_sys->p_mux;
1866 assert( p_mux != NULL );
1867
1868 sout_MuxSendBuffer( p_mux, (sout_input_t *)id, p_buffer );
1869 return VLC_SUCCESS;
1870 }
1871
1872
1873 /** Remove an ES from a non-RTP muxed stream */
1874 static int MuxDel( sout_stream_t *p_stream, sout_stream_id_t *id )
1875 {
1876 sout_mux_t *p_mux = p_stream->p_sys->p_mux;
1877 assert( p_mux != NULL );
1878
1879 sout_MuxDeleteStream( p_mux, (sout_input_t *)id );
1880 return VLC_SUCCESS;
1881 }
1882
1883
1884 static ssize_t AccessOutGrabberWriteBuffer( sout_stream_t *p_stream,
1885 const block_t *p_buffer )
1886 {
1887 sout_stream_sys_t *p_sys = p_stream->p_sys;
1888 sout_stream_id_t *id = p_sys->es[0];
1889
1890 int64_t i_dts = p_buffer->i_dts;
1891
1892 uint8_t *p_data = p_buffer->p_buffer;
1893 size_t i_data = p_buffer->i_buffer;
1894 size_t i_max = id->i_mtu - 12;
1895
1896 size_t i_packet = ( p_buffer->i_buffer + i_max - 1 ) / i_max;
1897
1898 while( i_data > 0 )
1899 {
1900 size_t i_size;
1901
1902 /* output complete packet */
1903 if( p_sys->packet &&
1904 p_sys->packet->i_buffer + i_data > i_max )
1905 {
1906 rtp_packetize_send( id, p_sys->packet );
1907 p_sys->packet = NULL;
1908 }
1909
1910 if( p_sys->packet == NULL )
1911 {
1912 /* allocate a new packet */
1913 p_sys->packet = block_New( p_stream, id->i_mtu );
1914 rtp_packetize_common( id, p_sys->packet, 1, i_dts );
1915 p_sys->packet->i_dts = i_dts;
1916 p_sys->packet->i_length = p_buffer->i_length / i_packet;
1917 i_dts += p_sys->packet->i_length;
1918 }
1919
1920 i_size = __MIN( i_data,
1921 (unsigned)(id->i_mtu - p_sys->packet->i_buffer) );
1922
1923 memcpy( &p_sys->packet->p_buffer[p_sys->packet->i_buffer],
1924 p_data, i_size );
1925
1926 p_sys->packet->i_buffer += i_size;
1927 p_data += i_size;
1928 i_data -= i_size;
1929 }
1930
1931 return VLC_SUCCESS;
1932 }
1933
1934
1935 static ssize_t AccessOutGrabberWrite( sout_access_out_t *p_access,
1936 block_t *p_buffer )
1937 {
1938 sout_stream_t *p_stream = (sout_stream_t*)p_access->p_sys;
1939
1940 while( p_buffer )
1941 {
1942 block_t *p_next;
1943
1944 AccessOutGrabberWriteBuffer( p_stream, p_buffer );
1945
1946 p_next = p_buffer->p_next;
1947 block_Release( p_buffer );
1948 p_buffer = p_next;
1949 }
1950
1951 return VLC_SUCCESS;
1952 }
1953
1954
1955 static sout_access_out_t *GrabberCreate( sout_stream_t *p_stream )
1956 {
1957 sout_access_out_t *p_grab;
1958
1959 p_grab = vlc_object_create( p_stream->p_sout, sizeof( *p_grab ) );
1960 if( p_grab == NULL )
1961 return NULL;
1962
1963 p_grab->p_module = NULL;
1964 p_grab->psz_access = strdup( "grab" );
1965 p_grab->p_cfg = NULL;
1966 p_grab->psz_path = strdup( "" );
1967 p_grab->p_sys = (sout_access_out_sys_t *)p_stream;
1968 p_grab->pf_seek = NULL;
1969 p_grab->pf_write = AccessOutGrabberWrite;
1970 vlc_object_attach( p_grab, p_stream );
1971 return p_grab;
1972 }