Enable RTSP rtpInfo track synchronization in live555 demuxer.
[vlc.git] / modules / demux / live555.cpp
1 /*****************************************************************************
2  * live555.cpp : LIVE555 Streaming Media support.
3  *****************************************************************************
4  * Copyright (C) 2003-2007 the VideoLAN team
5  * $Id$
6  *
7  * Authors: Laurent Aimar <fenrir@via.ecp.fr>
8  *          Derk-Jan Hartman <hartman at videolan. org>
9  *          Derk-Jan Hartman <djhartman at m2x .dot. nl> for M2X
10  *
11  * This program is free software; you can redistribute it and/or modify
12  * it under the terms of the GNU General Public License as published by
13  * the Free Software Foundation; either version 2 of the License, or
14  * (at your option) any later version.
15  *
16  * This program is distributed in the hope that it will be useful,
17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
19  * GNU General Public License for more details.
20  *
21  * You should have received a copy of the GNU General Public License
22  * along with this program; if not, write to the Free Software
23  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
24  *****************************************************************************/
25
26 /*****************************************************************************
27  * Preamble
28  *****************************************************************************/
29
30 #include <vlc/vlc.h>
31
32 #include <vlc_demux.h>
33 #include <vlc_interface.h>
34 #include <vlc_network.h>
35 #include <vlc_url.h>
36
37 #include <iostream>
38
39 #if defined( WIN32 )
40 #   include <winsock2.h>
41 #endif
42
43 #include "UsageEnvironment.hh"
44 #include "BasicUsageEnvironment.hh"
45 #include "GroupsockHelper.hh"
46 #include "liveMedia.hh"
47
48 extern "C" {
49 #include "../access/mms/asf.h"  /* Who said ugly ? */
50 }
51
52 using namespace std;
53
54 /*****************************************************************************
55  * Module descriptor
56  *****************************************************************************/
57 static int  Open ( vlc_object_t * );
58 static void Close( vlc_object_t * );
59
60 #define CACHING_TEXT N_("Caching value (ms)")
61 #define CACHING_LONGTEXT N_( \
62     "Allows you to modify the default caching value for RTSP streams. This " \
63     "value should be set in millisecond units." )
64
65 #define KASENNA_TEXT N_( "Kasenna RTSP dialect")
66 #define KASENNA_LONGTEXT N_( "Kasenna servers use an old and unstandard " \
67     "dialect of RTSP. When you set this parameter, VLC will try this dialect "\
68     "for communication. In this mode you cannot connect to normal RTSP servers." )
69
70 #define USER_TEXT N_("RTSP user name")
71 #define USER_LONGTEXT N_("Allows you to modify the user name that will " \
72     "be used for authenticating the connection.")
73 #define PASS_TEXT N_("RTSP password")
74 #define PASS_LONGTEXT N_("Allows you to modify the password that will be " \
75     "used for the connection.")
76
77 vlc_module_begin();
78     set_description( _("RTP/RTSP/SDP demuxer (using Live555)" ) );
79     set_capability( "demux2", 50 );
80     set_shortname( "RTP/RTSP");
81     set_callbacks( Open, Close );
82     add_shortcut( "live" );
83     add_shortcut( "livedotcom" );
84     set_category( CAT_INPUT );
85     set_subcategory( SUBCAT_INPUT_DEMUX );
86
87     add_submodule();
88         set_description( _("RTSP/RTP access and demux") );
89         add_shortcut( "rtsp" );
90         add_shortcut( "sdp" );
91         set_capability( "access_demux", 0 );
92         set_callbacks( Open, Close );
93         add_bool( "rtsp-tcp", 0, NULL,
94                   N_("Use RTP over RTSP (TCP)"),
95                   N_("Use RTP over RTSP (TCP)"), VLC_TRUE );
96         add_integer( "rtp-client-port", -1, NULL,
97                   N_("Client port"),
98                   N_("Port to use for the RTP source of the session"), VLC_TRUE );
99         add_bool( "rtsp-http", 0, NULL,
100                   N_("Tunnel RTSP and RTP over HTTP"),
101                   N_("Tunnel RTSP and RTP over HTTP"), VLC_TRUE );
102         add_integer( "rtsp-http-port", 80, NULL,
103                   N_("HTTP tunnel port"),
104                   N_("Port to use for tunneling the RTSP/RTP over HTTP."),
105                   VLC_TRUE );
106         add_integer("rtsp-caching", 4 * DEFAULT_PTS_DELAY / 1000, NULL,
107                     CACHING_TEXT, CACHING_LONGTEXT, VLC_TRUE );
108         add_bool(   "rtsp-kasenna", VLC_FALSE, NULL, KASENNA_TEXT,
109                     KASENNA_LONGTEXT, VLC_TRUE );
110         add_string( "rtsp-user", NULL, NULL, USER_TEXT,
111                     USER_LONGTEXT, VLC_TRUE );
112         add_string( "rtsp-pwd", NULL, NULL, PASS_TEXT,
113                     PASS_LONGTEXT, VLC_TRUE );
114 vlc_module_end();
115
116
117 /*****************************************************************************
118  * Local prototypes
119  *****************************************************************************/
120
121 typedef struct
122 {
123     demux_t         *p_demux;
124     MediaSubsession *sub;
125
126     es_format_t     fmt;
127     es_out_id_t     *p_es;
128
129     vlc_bool_t      b_muxed;
130     vlc_bool_t      b_quicktime;
131     vlc_bool_t      b_asf;
132     stream_t        *p_out_muxed;    /* for muxed stream */
133
134     uint8_t         *p_buffer;
135     unsigned int    i_buffer;
136
137     vlc_bool_t      b_rtcp_sync;
138     char            waiting;
139     int64_t         i_pts;
140     u_int32_t       i_start_seq;
141
142 } live_track_t;
143
144 struct timeout_thread_t
145 {
146     VLC_COMMON_MEMBERS
147
148     int64_t      i_remain;
149     demux_sys_t  *p_sys;
150 };
151
152 struct demux_sys_t
153 {
154     char            *p_sdp;    /* XXX mallocated */
155     char            *psz_path; /* URL-encoded path */
156     vlc_url_t       url;
157
158     MediaSession     *ms;
159     TaskScheduler    *scheduler;
160     UsageEnvironment *env ;
161     RTSPClient       *rtsp;
162
163     /* */
164     int              i_track;
165     live_track_t     **track;   /* XXX mallocated */
166
167     /* Weird formats */
168     asf_header_t     asfh;
169     stream_t         *p_out_asf;
170     vlc_bool_t       b_real;
171
172     /* */
173     int64_t          i_pcr; /* The clock */
174     int64_t          i_npt; /* The current time in the stream */
175     int64_t          i_npt_length;
176     int64_t          i_npt_start;
177
178     /* timeout thread information */
179     int              i_timeout;     /* session timeout value in seconds */
180     vlc_bool_t       b_timeout_call;/* mark to send an RTSP call to prevent server timeout */
181     timeout_thread_t *p_timeout;    /* the actual thread that makes sure we don't timeout */
182
183     /* */
184     vlc_bool_t       b_multicast;   /* true if one of the tracks is multicasted */
185     vlc_bool_t       b_no_data;     /* true if we never receive any data */
186     int              i_no_data_ti;  /* consecutive number of TaskInterrupt */
187
188     char             event;
189 };
190
191 static int Demux  ( demux_t * );
192 static int Control( demux_t *, int, va_list );
193
194 static int Connect      ( demux_t * );
195 static int SessionsSetup( demux_t * );
196 static int Play         ( demux_t *);
197 static int ParseASF     ( demux_t * );
198 static int RollOverTcp  ( demux_t * );
199
200 static void StreamRead  ( void *, unsigned int, unsigned int,
201                           struct timeval, unsigned int );
202 static void StreamClose ( void * );
203 static void TaskInterrupt( void * );
204
205 static void TimeoutPrevention( timeout_thread_t * );
206
207 static unsigned char* parseH264ConfigStr( char const* configStr,
208                                           unsigned int& configSize );
209
210 /*****************************************************************************
211  * DemuxOpen:
212  *****************************************************************************/
213 static int  Open ( vlc_object_t *p_this )
214 {
215     demux_t     *p_demux = (demux_t*)p_this;
216     demux_sys_t *p_sys = NULL;
217
218     MediaSubsessionIterator *iter   = NULL;
219     MediaSubsession         *sub    = NULL;
220     int i, i_return;
221
222     if( p_demux->s )
223     {
224         /* See if it looks like a SDP
225            v, o, s fields are mandatory and in this order */
226         const uint8_t *p_peek;
227         if( stream_Peek( p_demux->s, &p_peek, 7 ) < 7 ) return VLC_EGENERIC;
228
229         if( memcmp( p_peek, "v=0\r\n", 5 ) &&
230             memcmp( p_peek, "v=0\n", 4 ) &&
231             ( p_peek[0] < 'a' || p_peek[0] > 'z' || p_peek[1] != '=' ) )
232         {
233             return VLC_EGENERIC;
234         }
235     }
236     else
237     {
238         var_Create( p_demux, "rtsp-caching", VLC_VAR_INTEGER|VLC_VAR_DOINHERIT );
239     }
240
241     p_demux->pf_demux  = Demux;
242     p_demux->pf_control= Control;
243     p_demux->p_sys     = p_sys = (demux_sys_t*)malloc( sizeof( demux_sys_t ) );
244     if( !p_sys ) return VLC_ENOMEM;
245
246     p_sys->p_sdp = NULL;
247     p_sys->scheduler = NULL;
248     p_sys->env = NULL;
249     p_sys->ms = NULL;
250     p_sys->rtsp = NULL;
251     p_sys->i_track = 0;
252     p_sys->track   = NULL;
253     p_sys->i_pcr = 0;
254     p_sys->i_npt = 0;
255     p_sys->i_npt_start = 0;
256     p_sys->i_npt_length = 0;
257     p_sys->p_out_asf = NULL;
258     p_sys->b_no_data = VLC_TRUE;
259     p_sys->i_no_data_ti = 0;
260     p_sys->p_timeout = NULL;
261     p_sys->i_timeout = 0;
262     p_sys->b_timeout_call = VLC_FALSE;
263     p_sys->b_multicast = VLC_FALSE;
264     p_sys->b_real = VLC_FALSE;
265     p_sys->psz_path = strdup( p_demux->psz_path );
266
267     /* parse URL for rtsp://[user:[passwd]@]serverip:port/options */
268     vlc_UrlParse( &p_sys->url, p_sys->psz_path, 0 );
269
270     if( ( p_sys->scheduler = BasicTaskScheduler::createNew() ) == NULL )
271     {
272         msg_Err( p_demux, "BasicTaskScheduler::createNew failed" );
273         goto error;
274     }
275     if( !( p_sys->env = BasicUsageEnvironment::createNew(*p_sys->scheduler) ) )
276     {
277         msg_Err( p_demux, "BasicUsageEnvironment::createNew failed" );
278         goto error;
279     }
280
281     if( strcasecmp( p_demux->psz_access, "sdp" ) )
282     {
283         char *p = p_sys->psz_path;
284         while( (p = strchr( p, ' ' )) != NULL ) *p = '+';
285     }
286
287     if( p_demux->s != NULL )
288     {
289         /* Gather the complete sdp file */
290         int     i_sdp       = 0;
291         int     i_sdp_max   = 1000;
292         uint8_t *p_sdp      = (uint8_t*) malloc( i_sdp_max );
293
294         for( ;; )
295         {
296             int i_read = stream_Read( p_demux->s, &p_sdp[i_sdp],
297                                       i_sdp_max - i_sdp - 1 );
298
299             if( i_read < 0 )
300             {
301                 msg_Err( p_demux, "failed to read SDP" );
302                 free( p_sys );
303                 return VLC_EGENERIC;
304             }
305
306             i_sdp += i_read;
307
308             if( i_read < i_sdp_max - i_sdp - 1 )
309             {
310                 p_sdp[i_sdp] = '\0';
311                 break;
312             }
313
314             i_sdp_max += 1000;
315             p_sdp = (uint8_t*)realloc( p_sdp, i_sdp_max );
316         }
317         p_sys->p_sdp = (char*)p_sdp;
318     }
319     else if( ( p_demux->s == NULL ) &&
320              !strcasecmp( p_demux->psz_access, "sdp" ) )
321     {
322         /* sdp:// link from SAP */
323         p_sys->p_sdp = strdup( p_sys->psz_path );
324     }
325     else if( ( i_return = Connect( p_demux ) ) != VLC_SUCCESS )
326     {
327         msg_Err( p_demux, "Failed to connect with rtsp://%s", p_sys->psz_path );
328         goto error;
329     }
330
331     if( p_sys->p_sdp == NULL )
332     {
333         msg_Err( p_demux, "Failed to retrieve the RTSP Session Description" );
334         goto error;
335     }
336
337     if( ( i_return = SessionsSetup( p_demux ) ) != VLC_SUCCESS )
338     {
339         msg_Err( p_demux, "Nothing to play for rtsp://%s", p_sys->psz_path );
340         goto error;
341     }
342
343     if( p_sys->b_real ) goto error;
344
345     if( ( i_return = Play( p_demux ) ) != VLC_SUCCESS )
346         goto error;
347
348     if( p_sys->p_out_asf && ParseASF( p_demux ) )
349     {
350         msg_Err( p_demux, "cannot find a usable asf header" );
351         /* TODO Clean tracks */
352         goto error;
353     }
354
355     if( p_sys->i_track <= 0 )
356         goto error;
357
358     return VLC_SUCCESS;
359
360 error:
361     for( i = 0; i < p_sys->i_track; i++ )
362     {
363         live_track_t *tk = p_sys->track[i];
364
365         if( tk->b_muxed ) stream_DemuxDelete( tk->p_out_muxed );
366         free( tk->p_buffer );
367         free( tk );
368     }
369
370     if( p_sys->i_track ) free( p_sys->track );
371     if( p_sys->p_out_asf ) stream_DemuxDelete( p_sys->p_out_asf );
372     if( p_sys->rtsp && p_sys->ms ) p_sys->rtsp->teardownMediaSession( *p_sys->ms );
373     if( p_sys->ms ) Medium::close( p_sys->ms );
374     if( p_sys->rtsp ) RTSPClient::close( p_sys->rtsp );
375     if( p_sys->env ) p_sys->env->reclaim();
376     if( p_sys->p_timeout )
377     {
378         vlc_object_kill( p_sys->p_timeout );
379         vlc_thread_join( p_sys->p_timeout );
380         vlc_object_detach( p_sys->p_timeout );
381         vlc_object_destroy( p_sys->p_timeout );
382     }
383     if( p_sys->scheduler ) delete p_sys->scheduler;
384     if( p_sys->p_sdp ) free( p_sys->p_sdp );
385     if( p_sys->psz_path ) free( p_sys->psz_path );
386
387     vlc_UrlClean( &p_sys->url );
388
389     free( p_sys );
390     return VLC_EGENERIC;
391 }
392
393 /*****************************************************************************
394  * DemuxClose:
395  *****************************************************************************/
396 static void Close( vlc_object_t *p_this )
397 {
398     demux_t *p_demux = (demux_t*)p_this;
399     demux_sys_t *p_sys = p_demux->p_sys;
400     int i;
401
402     for( i = 0; i < p_sys->i_track; i++ )
403     {
404         live_track_t *tk = p_sys->track[i];
405
406         if( tk->b_muxed ) stream_DemuxDelete( tk->p_out_muxed );
407         free( tk->p_buffer );
408         free( tk );
409     }
410
411     if( p_sys->i_track ) free( p_sys->track );
412     if( p_sys->p_out_asf ) stream_DemuxDelete( p_sys->p_out_asf );
413     if( p_sys->rtsp && p_sys->ms ) p_sys->rtsp->teardownMediaSession( *p_sys->ms );
414     if( p_sys->ms ) Medium::close( p_sys->ms );
415     if( p_sys->rtsp ) RTSPClient::close( p_sys->rtsp );
416     if( p_sys->env ) p_sys->env->reclaim();
417     if( p_sys->p_timeout )
418     {
419         vlc_object_kill( p_sys->p_timeout );
420         vlc_thread_join( p_sys->p_timeout );
421         vlc_object_detach( p_sys->p_timeout );
422         vlc_object_destroy( p_sys->p_timeout );
423     }
424     if( p_sys->scheduler ) delete p_sys->scheduler;
425     if( p_sys->p_sdp ) free( p_sys->p_sdp );
426     if( p_sys->psz_path ) free( p_sys->psz_path );
427
428     vlc_UrlClean( &p_sys->url );
429
430     free( p_sys );
431 }
432
433 /*****************************************************************************
434  * Connect: connects to the RTSP server to setup the session DESCRIBE
435  *****************************************************************************/
436 static int Connect( demux_t *p_demux )
437 {
438     demux_sys_t *p_sys = p_demux->p_sys;
439     Authenticator authenticator;
440
441     char *psz_user    = NULL;
442     char *psz_pwd     = NULL;
443     char *psz_url     = NULL;
444     char *psz_options = NULL;
445     char *p_sdp       = NULL;
446     int  i_http_port  = 0;
447     int  i_ret        = VLC_SUCCESS;
448
449 createnew:
450     if( var_CreateGetBool( p_demux, "rtsp-http" ) )
451         i_http_port = var_CreateGetInteger( p_demux, "rtsp-http-port" );
452
453     if( ( p_sys->rtsp = RTSPClient::createNew( *p_sys->env,
454           p_demux->p_libvlc->i_verbose > 1,
455           "VLC media player", i_http_port ) ) == NULL )
456     {
457         msg_Err( p_demux, "RTSPClient::createNew failed (%s)",
458                  p_sys->env->getResultMsg() );
459         return VLC_EGENERIC;
460     }
461
462     psz_url = (char*)malloc( strlen( p_sys->psz_path ) + 8 );
463     if( !psz_url ) return VLC_ENOMEM;
464
465     if( p_sys->url.psz_username || p_sys->url.psz_password )
466     {
467         sprintf( psz_url, "rtsp://%s%s", p_sys->url.psz_host,
468                  p_sys->url.psz_path );
469
470         psz_user = strdup( p_sys->url.psz_username );
471         psz_pwd  = strdup( p_sys->url.psz_password );
472     }
473     else
474     {
475         sprintf( psz_url, "rtsp://%s", p_sys->psz_path );
476
477         psz_user = var_CreateGetString( p_demux, "rtsp-user" );
478         psz_pwd  = var_CreateGetString( p_demux, "rtsp-pwd" );
479     }
480
481     authenticator.setUsernameAndPassword( (const char*)psz_user,
482                                           (const char*)psz_pwd );
483
484     psz_options = p_sys->rtsp->sendOptionsCmd( psz_url, psz_user, psz_pwd,
485                                                &authenticator );
486     if( psz_options ) delete [] psz_options;
487
488 describe:
489     p_sdp = p_sys->rtsp->describeURL( psz_url,
490                 &authenticator, var_CreateGetBool( p_demux, "rtsp-kasenna" ) );
491
492     if( psz_user ) free( psz_user );
493     if( psz_pwd ) free( psz_pwd );
494
495     if( p_sdp == NULL )
496     {
497         /* failure occurred */
498         int i_code = 0;
499         const char *psz_error = p_sys->env->getResultMsg();
500
501         msg_Dbg( p_demux, "DESCRIBE failed with %d: %s", i_code, psz_error );
502         sscanf( psz_error, "%*sRTSP/%*s%3u", &i_code );
503
504         if( i_code == 401 )
505         {
506             char *psz_login = NULL; char *psz_password = NULL;
507             msg_Dbg( p_demux, "authentication failed" );
508
509             i_ret = intf_UserLoginPassword( p_demux, _("RTSP authentication"),
510                            _("Please enter a valid login name and a password."),
511                                                    &psz_login, &psz_password );
512             if( i_ret == DIALOG_OK_YES )
513             {
514                msg_Dbg( p_demux, "retrying with user=%s, pwd=%s",
515                            psz_login, psz_password );
516                if( psz_url ) free( psz_url );
517                if( psz_login ) psz_user = psz_login;
518                if( psz_password ) psz_pwd = psz_password;
519                goto describe;
520             }
521             if( psz_login ) free( psz_login );
522             if( psz_password ) free( psz_password );
523         }
524         else if( !var_GetBool( p_demux, "rtsp-http" ) )
525         {
526             /* Perhaps a firewall is being annoying. Try HTTP tunneling mode */
527             vlc_value_t val;
528             val.b_bool = VLC_TRUE;
529             msg_Dbg( p_demux, "we will now try HTTP tunneling mode" );
530             var_Set( p_demux, "rtsp-http", val );
531             if( psz_url ) free( psz_url );
532             if( p_sys->rtsp ) RTSPClient::close( p_sys->rtsp );
533             goto createnew;
534         }
535         i_ret = VLC_EGENERIC;
536     }
537     if( psz_url ) free( psz_url );
538
539     /* malloc-ated copy */
540     if( p_sys->p_sdp ) free( p_sys->p_sdp );
541     p_sys->p_sdp = NULL;
542     if( p_sdp ) p_sys->p_sdp = strdup( (char*)p_sdp );
543     delete[] p_sdp;
544
545     return i_ret;
546 }
547
548 /*****************************************************************************
549  * SessionsSetup: prepares the subsessions and does the SETUP
550  *****************************************************************************/
551 static int SessionsSetup( demux_t *p_demux )
552 {
553     demux_sys_t             *p_sys  = p_demux->p_sys;
554     MediaSubsessionIterator *iter   = NULL;
555     MediaSubsession         *sub    = NULL;
556
557     vlc_bool_t     b_rtsp_tcp = VLC_FALSE;
558     int            i_client_port;
559     int            i_return = VLC_SUCCESS;
560     unsigned int   i_buffer = 0;
561     unsigned const thresh = 200000; /* RTP reorder threshold .2 second (default .1) */
562
563     b_rtsp_tcp    = var_CreateGetBool( p_demux, "rtsp-tcp" ) ||
564                     var_GetBool( p_demux, "rtsp-http" );
565     i_client_port = var_CreateGetInteger( p_demux, "rtp-client-port" );
566
567     /* Create the session from the SDP */
568     if( !( p_sys->ms = MediaSession::createNew( *p_sys->env, p_sys->p_sdp ) ) )
569     {
570         msg_Err( p_demux, "Could not create the RTSP Session: %s",
571             p_sys->env->getResultMsg() );
572         return VLC_EGENERIC;
573     }
574
575     /* Initialise each media subsession */
576     iter = new MediaSubsessionIterator( *p_sys->ms );
577     while( ( sub = iter->next() ) != NULL )
578     {
579         Boolean bInit;
580         live_track_t *tk;
581
582         /* Value taken from mplayer */
583         if( !strcmp( sub->mediumName(), "audio" ) )
584             i_buffer = 100000;
585         else if( !strcmp( sub->mediumName(), "video" ) )
586             i_buffer = 2000000;
587         else continue;
588
589         if( i_client_port != -1 )
590         {
591             sub->setClientPortNum( i_client_port );
592             i_client_port += 2;
593         }
594
595         if( strcasestr( sub->codecName(), "REAL" ) )
596         {
597             msg_Info( p_demux, "real codec detected, using real-RTSP instead" );
598             p_sys->b_real = VLC_TRUE; /* This is a problem, we'll handle it later */
599             continue;
600         }
601
602         if( !strcmp( sub->codecName(), "X-ASF-PF" ) )
603             bInit = sub->initiate( 4 ); /* Constant ? */
604         else
605             bInit = sub->initiate();
606
607         if( !bInit )
608         {
609             msg_Warn( p_demux, "RTP subsession '%s/%s' failed (%s)",
610                       sub->mediumName(), sub->codecName(),
611                       p_sys->env->getResultMsg() );
612         }
613         else
614         {
615             if( sub->rtpSource() != NULL )
616             {
617                 int fd = sub->rtpSource()->RTPgs()->socketNum();
618
619                 /* Increase the buffer size */
620                 if( i_buffer > 0 )
621                     increaseReceiveBufferTo( *p_sys->env, fd, i_buffer );
622
623                 /* Increase the RTP reorder timebuffer just a bit */
624                 sub->rtpSource()->setPacketReorderingThresholdTime(thresh);
625             }
626             msg_Dbg( p_demux, "RTP subsession '%s/%s'", sub->mediumName(),
627                      sub->codecName() );
628
629             /* Issue the SETUP */
630             if( p_sys->rtsp )
631             {
632                 if( !( p_sys->rtsp->setupMediaSubsession( *sub, False,
633                                                    b_rtsp_tcp ? True : False ) ) )
634                 {
635                     /* if we get an unsupported transport error, toggle TCP use and try again */
636                     if( !strstr(p_sys->env->getResultMsg(), "461 Unsupported Transport")
637                      || !( p_sys->rtsp->setupMediaSubsession( *sub, False,
638                                                    b_rtsp_tcp ? False : True ) ) )
639                     {
640                         msg_Err( p_demux, "SETUP of'%s/%s' failed %s", sub->mediumName(),
641                                  sub->codecName(), p_sys->env->getResultMsg() );
642                         continue;
643                     }
644                 }
645             }
646
647             /* Check if we will receive data from this subsession for this track */
648             if( sub->readSource() == NULL ) continue;
649             if( !p_sys->b_multicast )
650             {
651                 /* Check, because we need diff. rollover behaviour for multicast */
652                 p_sys->b_multicast = IsMulticastAddress( sub->connectionEndpointAddress() );
653             }
654
655             tk = (live_track_t*)malloc( sizeof( live_track_t ) );
656             tk->p_demux     = p_demux;
657             tk->sub         = sub;
658             tk->p_es        = NULL;
659             tk->b_quicktime = VLC_FALSE;
660             tk->b_asf       = VLC_FALSE;
661             tk->b_muxed     = VLC_FALSE;
662             tk->p_out_muxed = NULL;
663             tk->waiting     = 0;
664             tk->b_rtcp_sync = VLC_FALSE;
665             tk->i_pts       = 0;
666             tk->i_buffer    = 65536;
667             tk->p_buffer    = (uint8_t *)malloc( 65536 );
668
669             /* Value taken from mplayer */
670             if( !strcmp( sub->mediumName(), "audio" ) )
671             {
672                 es_format_Init( &tk->fmt, AUDIO_ES, VLC_FOURCC('u','n','d','f') );
673                 tk->fmt.audio.i_channels = sub->numChannels();
674                 tk->fmt.audio.i_rate = sub->rtpTimestampFrequency();
675
676                 if( !strcmp( sub->codecName(), "MPA" ) ||
677                     !strcmp( sub->codecName(), "MPA-ROBUST" ) ||
678                     !strcmp( sub->codecName(), "X-MP3-DRAFT-00" ) )
679                 {
680                     tk->fmt.i_codec = VLC_FOURCC( 'm', 'p', 'g', 'a' );
681                     tk->fmt.audio.i_rate = 0;
682                 }
683                 else if( !strcmp( sub->codecName(), "AC3" ) )
684                 {
685                     tk->fmt.i_codec = VLC_FOURCC( 'a', '5', '2', ' ' );
686                     tk->fmt.audio.i_rate = 0;
687                 }
688                 else if( !strcmp( sub->codecName(), "L16" ) )
689                 {
690                     tk->fmt.i_codec = VLC_FOURCC( 't', 'w', 'o', 's' );
691                     tk->fmt.audio.i_bitspersample = 16;
692                 }
693                 else if( !strcmp( sub->codecName(), "L8" ) )
694                 {
695                     tk->fmt.i_codec = VLC_FOURCC( 'a', 'r', 'a', 'w' );
696                     tk->fmt.audio.i_bitspersample = 8;
697                 }
698                 else if( !strcmp( sub->codecName(), "PCMU" ) )
699                 {
700                     tk->fmt.i_codec = VLC_FOURCC( 'u', 'l', 'a', 'w' );
701                 }
702                 else if( !strcmp( sub->codecName(), "PCMA" ) )
703                 {
704                     tk->fmt.i_codec = VLC_FOURCC( 'a', 'l', 'a', 'w' );
705                 }
706                 else if( !strncmp( sub->codecName(), "G726", 4 ) )
707                 {
708                     tk->fmt.i_codec = VLC_FOURCC( 'g', '7', '2', '6' );
709                     tk->fmt.audio.i_rate = 8000;
710                     tk->fmt.audio.i_channels = 1;
711                     if( !strcmp( sub->codecName()+5, "40" ) )
712                         tk->fmt.i_bitrate = 40000;
713                     else if( !strcmp( sub->codecName()+5, "32" ) )
714                         tk->fmt.i_bitrate = 32000;
715                     else if( !strcmp( sub->codecName()+5, "24" ) )
716                         tk->fmt.i_bitrate = 24000;
717                     else if( !strcmp( sub->codecName()+5, "16" ) )
718                         tk->fmt.i_bitrate = 16000;
719                 }
720                 else if( !strcmp( sub->codecName(), "AMR" ) )
721                 {
722                     tk->fmt.i_codec = VLC_FOURCC( 's', 'a', 'm', 'r' );
723                 }
724                 else if( !strcmp( sub->codecName(), "AMR-WB" ) )
725                 {
726                     tk->fmt.i_codec = VLC_FOURCC( 's', 'a', 'w', 'b' );
727                 }
728                 else if( !strcmp( sub->codecName(), "MP4A-LATM" ) )
729                 {
730                     unsigned int i_extra;
731                     uint8_t      *p_extra;
732
733                     tk->fmt.i_codec = VLC_FOURCC( 'm', 'p', '4', 'a' );
734
735                     if( ( p_extra = parseStreamMuxConfigStr( sub->fmtp_config(),
736                                                              i_extra ) ) )
737                     {
738                         tk->fmt.i_extra = i_extra;
739                         tk->fmt.p_extra = malloc( i_extra );
740                         memcpy( tk->fmt.p_extra, p_extra, i_extra );
741                         delete[] p_extra;
742                     }
743                     /* Because the "faad" decoder does not handle the LATM data length field
744                        at the start of each returned LATM frame, tell the RTP source to omit it. */
745                     ((MPEG4LATMAudioRTPSource*)sub->rtpSource())->omitLATMDataLengthField();
746                 }
747                 else if( !strcmp( sub->codecName(), "MPEG4-GENERIC" ) )
748                 {
749                     unsigned int i_extra;
750                     uint8_t      *p_extra;
751
752                     tk->fmt.i_codec = VLC_FOURCC( 'm', 'p', '4', 'a' );
753
754                     if( ( p_extra = parseGeneralConfigStr( sub->fmtp_config(),
755                                                            i_extra ) ) )
756                     {
757                         tk->fmt.i_extra = i_extra;
758                         tk->fmt.p_extra = malloc( i_extra );
759                         memcpy( tk->fmt.p_extra, p_extra, i_extra );
760                         delete[] p_extra;
761                     }
762                 }
763                 else if( !strcmp( sub->codecName(), "X-ASF-PF" ) )
764                 {
765                     tk->b_asf = VLC_TRUE;
766                     if( p_sys->p_out_asf == NULL )
767                         p_sys->p_out_asf = stream_DemuxNew( p_demux, "asf",
768                                                             p_demux->out );
769                 }
770                 else if( !strcmp( sub->codecName(), "X-QT" ) ||
771                          !strcmp( sub->codecName(), "X-QUICKTIME" ) )
772                 {
773                     tk->b_quicktime = VLC_TRUE;
774                 }
775                 else if( !strcmp( sub->codecName(), "SPEEX" ) )
776                 {
777                     tk->fmt.i_codec = VLC_FOURCC( 's', 'p', 'x', 'r' );
778                     if ( sub->rtpTimestampFrequency() )
779                         tk->fmt.audio.i_rate = sub->rtpTimestampFrequency();
780                     else
781                     {
782                         msg_Warn( p_demux,"Using 8kHz as default sample rate." );
783                         tk->fmt.audio.i_rate = 8000;
784                     }
785                 }
786             }
787             else if( !strcmp( sub->mediumName(), "video" ) )
788             {
789                 es_format_Init( &tk->fmt, VIDEO_ES, VLC_FOURCC('u','n','d','f') );
790                 if( !strcmp( sub->codecName(), "MPV" ) )
791                 {
792                     tk->fmt.i_codec = VLC_FOURCC( 'm', 'p', 'g', 'v' );
793                 }
794                 else if( !strcmp( sub->codecName(), "H263" ) ||
795                          !strcmp( sub->codecName(), "H263-1998" ) ||
796                          !strcmp( sub->codecName(), "H263-2000" ) )
797                 {
798                     tk->fmt.i_codec = VLC_FOURCC( 'H', '2', '6', '3' );
799                 }
800                 else if( !strcmp( sub->codecName(), "H261" ) )
801                 {
802                     tk->fmt.i_codec = VLC_FOURCC( 'H', '2', '6', '1' );
803                 }
804                 else if( !strcmp( sub->codecName(), "H264" ) )
805                 {
806                     unsigned int i_extra = 0;
807                     uint8_t      *p_extra = NULL;
808
809                     tk->fmt.i_codec = VLC_FOURCC( 'h', '2', '6', '4' );
810                     tk->fmt.b_packetized = VLC_FALSE;
811
812                     if((p_extra=parseH264ConfigStr( sub->fmtp_spropparametersets(),
813                                                     i_extra ) ) )
814                     {
815                         tk->fmt.i_extra = i_extra;
816                         tk->fmt.p_extra = malloc( i_extra );
817                         memcpy( tk->fmt.p_extra, p_extra, i_extra );
818
819                         delete[] p_extra;
820                     }
821                 }
822                 else if( !strcmp( sub->codecName(), "JPEG" ) )
823                 {
824                     tk->fmt.i_codec = VLC_FOURCC( 'M', 'J', 'P', 'G' );
825                 }
826                 else if( !strcmp( sub->codecName(), "MP4V-ES" ) )
827                 {
828                     unsigned int i_extra;
829                     uint8_t      *p_extra;
830
831                     tk->fmt.i_codec = VLC_FOURCC( 'm', 'p', '4', 'v' );
832
833                     if( ( p_extra = parseGeneralConfigStr( sub->fmtp_config(),
834                                                            i_extra ) ) )
835                     {
836                         tk->fmt.i_extra = i_extra;
837                         tk->fmt.p_extra = malloc( i_extra );
838                         memcpy( tk->fmt.p_extra, p_extra, i_extra );
839                         delete[] p_extra;
840                     }
841                 }
842                 else if( !strcmp( sub->codecName(), "X-QT" ) ||
843                          !strcmp( sub->codecName(), "X-QUICKTIME" ) ||
844                          !strcmp( sub->codecName(), "X-QDM" ) ||
845                          !strcmp( sub->codecName(), "X-SV3V-ES" )  ||
846                          !strcmp( sub->codecName(), "X-SORENSONVIDEO" ) )
847                 {
848                     tk->b_quicktime = VLC_TRUE;
849                 }
850                 else if( !strcmp( sub->codecName(), "MP2T" ) )
851                 {
852                     tk->b_muxed = VLC_TRUE;
853                     tk->p_out_muxed = stream_DemuxNew( p_demux, "ts", p_demux->out );
854                 }
855                 else if( !strcmp( sub->codecName(), "MP2P" ) ||
856                          !strcmp( sub->codecName(), "MP1S" ) )
857                 {
858                     tk->b_muxed = VLC_TRUE;
859                     tk->p_out_muxed = stream_DemuxNew( p_demux, "ps",
860                                                        p_demux->out );
861                 }
862                 else if( !strcmp( sub->codecName(), "X-ASF-PF" ) )
863                 {
864                     tk->b_asf = VLC_TRUE;
865                     if( p_sys->p_out_asf == NULL )
866                         p_sys->p_out_asf = stream_DemuxNew( p_demux, "asf",
867                                                             p_demux->out );;
868                 }
869             }
870
871             if( !tk->b_quicktime && !tk->b_muxed && !tk->b_asf )
872             {
873                 tk->p_es = es_out_Add( p_demux->out, &tk->fmt );
874             }
875
876             if( sub->rtcpInstance() != NULL )
877             {
878                 sub->rtcpInstance()->setByeHandler( StreamClose, tk );
879             }
880
881             if( tk->p_es || tk->b_quicktime || tk->b_muxed || tk->b_asf )
882             {
883                 /* Append */
884                 p_sys->track = (live_track_t**)realloc( p_sys->track, sizeof( live_track_t ) * ( p_sys->i_track + 1 ) );
885                 p_sys->track[p_sys->i_track++] = tk;
886             }
887             else
888             {
889                 /* BUG ??? */
890                 msg_Err( p_demux, "unusable RTSP track. this should not happen" );
891                 free( tk );
892             }
893         }
894     }
895     delete iter;
896     if( p_sys->i_track <= 0 ) i_return = VLC_EGENERIC;
897
898 #if (LIVEMEDIA_LIBRARY_VERSION_INT >= 9999999999)
899     /* Retrieve the starttime if possible */
900     p_sys->i_npt_start = (int64_t)( p_sys->ms->playStartTime() * (double)1000000.0 );
901 #else
902     p_sys->i_npt_start = (int64_t) -1;
903 #endif
904     if( p_sys->i_npt_start < 0 )
905         p_sys->i_npt_start = -1;
906
907 #if (LIVEMEDIA_LIBRARY_VERSION_INT >= 9999999999)
908     /* Retrieve the duration if possible */
909     p_sys->i_npt_length = (int64_t)( p_sys->ms->playEndTime() * (double)1000000.0 );
910 #else
911     p_sys->i_npt_length = (int64_t) -1;
912 #endif
913     if( p_sys->i_npt_length < 0 )
914         p_sys->i_npt_length = -1;
915
916     msg_Dbg( p_demux, "setup start: %lld stop:%lld", p_sys->i_npt_start, p_sys->i_npt_length );
917     return i_return;
918 }
919
920 /*****************************************************************************
921  * Play: starts the actual playback of the stream
922  *****************************************************************************/
923 static int Play( demux_t *p_demux )
924 {
925     demux_sys_t *p_sys = p_demux->p_sys;
926     int i;
927
928     if( p_sys->rtsp )
929     {
930         /* The PLAY */
931         if( !p_sys->rtsp->playMediaSession( *p_sys->ms, p_sys->i_npt_start, -1, 1 ) )
932         {
933             msg_Err( p_demux, "RTSP PLAY failed %s", p_sys->env->getResultMsg() );
934             return VLC_EGENERIC;
935         }
936
937         /* Retrieve the timeout value and set up a timeout prevention thread */
938         p_sys->i_timeout = p_sys->rtsp->sessionTimeoutParameter();
939         if( p_sys->i_timeout <= 0 )
940             p_sys->i_timeout = 60; /* default value from RFC2326 */
941         if( !p_sys->p_timeout )
942         {
943             msg_Dbg( p_demux, "We have a timeout of %d seconds",  p_sys->i_timeout );
944             p_sys->p_timeout = (timeout_thread_t *)vlc_object_create( p_demux, sizeof(timeout_thread_t) );
945             p_sys->p_timeout->p_sys = p_demux->p_sys; /* lol, object recursion :D */
946             if( vlc_thread_create( p_sys->p_timeout, "liveMedia-timeout", TimeoutPrevention,
947                                    VLC_THREAD_PRIORITY_LOW, VLC_TRUE ) )
948             {
949                 msg_Err( p_demux, "cannot spawn liveMedia timeout thread" );
950                 vlc_object_destroy( p_sys->p_timeout );
951             }
952             msg_Dbg( p_demux, "spawned timeout thread" );
953             vlc_object_attach( p_sys->p_timeout, p_demux );
954         }
955     }
956     p_sys->i_pcr = 0;
957
958 #if (LIVEMEDIA_LIBRARY_VERSION_INT >= 1195257600)
959     /* TODO */
960     for( i = 0; i < p_sys->i_track; i++ )
961     {
962         p_sys->track[i]->i_pts = (int64_t) ( p_sys->track[i]->sub->rtpInfo.timestamp * (double)1000000.0 );
963         p_sys->track[i]->i_start_seq = (int)p_sys->track[i]->sub->rtpInfo.seqNum;
964         msg_Info( p_demux, "set startseq: %u", p_sys->track[i]->i_start_seq );
965     }
966 #endif
967
968 #if (LIVEMEDIA_LIBRARY_VERSION_INT >= 9999999999)
969     /* Retrieve the starttime if possible */
970     p_sys->i_npt_start = (int64_t)( p_sys->ms->playStartTime() * (double)1000000.0 );
971 #else
972     p_sys->i_npt_start = -1;
973 #endif
974     if( p_sys->i_npt_start < 0 )
975     {
976         p_sys->i_npt_start = -1;
977         p_sys->i_npt = 0;
978     }
979     else
980         p_sys->i_npt = p_sys->i_npt_start;
981
982 #if (LIVEMEDIA_LIBRARY_VERSION_INT >= 9999999999)
983     /* Retrieve the duration if possible */
984     p_sys->i_npt_length = (int64_t)( p_sys->ms->playEndTime() * (double)1000000.0 );
985 #else
986     p_sys->i_npt_length = -1;
987 #endif
988     if( p_sys->i_npt_length < 0 )
989         p_sys->i_npt_length = -1;
990
991     msg_Dbg( p_demux, "play start: %lld stop:%lld", p_sys->i_npt_start, p_sys->i_npt_length );
992     return VLC_SUCCESS;
993 }
994
995
996 /*****************************************************************************
997  * Demux:
998  *****************************************************************************/
999 static int Demux( demux_t *p_demux )
1000 {
1001     demux_sys_t    *p_sys = p_demux->p_sys;
1002     TaskToken      task;
1003
1004     vlc_bool_t      b_send_pcr = VLC_TRUE;
1005     int64_t         i_pcr = 0;
1006     int             i;
1007
1008     /* Check if we need to send the server a Keep-A-Live signal */
1009     if( p_sys->b_timeout_call && p_sys->rtsp && p_sys->ms )
1010     {
1011         p_sys->rtsp->setMediaSessionParameter( *p_sys->ms, "vlc" , "1" );
1012         p_sys->b_timeout_call = VLC_FALSE;
1013     }
1014
1015
1016     for( i = 0; i < p_sys->i_track; i++ )
1017     {
1018         live_track_t *tk = p_sys->track[i];
1019
1020         if( tk->b_asf || tk->b_muxed )
1021             b_send_pcr = VLC_FALSE;
1022 #if 0
1023         if( i_pcr == 0 )
1024         {
1025             i_pcr = tk->i_pts;
1026         }
1027         else if( tk->i_pts != 0 && i_pcr > tk->i_pts )
1028         {
1029             i_pcr = tk->i_pts ;
1030         }
1031 #endif
1032     }
1033     if( p_sys->i_pcr > 0 )
1034     {
1035         if( b_send_pcr )
1036             es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_sys->i_pcr );
1037     }
1038
1039     /* First warn we want to read data */
1040     p_sys->event = 0;
1041     for( i = 0; i < p_sys->i_track; i++ )
1042     {
1043         live_track_t *tk = p_sys->track[i];
1044
1045         if( tk->waiting == 0 )
1046         {
1047             tk->waiting = 1;
1048             tk->sub->readSource()->getNextFrame( tk->p_buffer, tk->i_buffer,
1049                                           StreamRead, tk, StreamClose, tk );
1050         }
1051     }
1052     /* Create a task that will be called if we wait more than 300ms */
1053     task = p_sys->scheduler->scheduleDelayedTask( 300000, TaskInterrupt, p_demux );
1054
1055     /* Do the read */
1056     p_sys->scheduler->doEventLoop( &p_sys->event );
1057
1058     /* remove the task */
1059     p_sys->scheduler->unscheduleDelayedTask( task );
1060
1061     /* Check for gap in pts value */
1062     for( i = 0; i < p_sys->i_track; i++ )
1063     {
1064         live_track_t *tk = p_sys->track[i];
1065
1066         if( !tk->b_muxed && !tk->b_rtcp_sync &&
1067             tk->sub->rtpSource() && tk->sub->rtpSource()->hasBeenSynchronizedUsingRTCP() )
1068         {
1069             msg_Dbg( p_demux, "tk->rtpSource->hasBeenSynchronizedUsingRTCP()" );
1070
1071             es_out_Control( p_demux->out, ES_OUT_RESET_PCR );
1072             tk->b_rtcp_sync = VLC_TRUE;
1073             /* reset PCR */
1074             tk->i_pts = 0;
1075             p_sys->i_pcr = 0;
1076             i_pcr = 0;
1077         }
1078     }
1079
1080     if( p_sys->b_multicast && p_sys->b_no_data &&
1081         ( p_sys->i_no_data_ti > 120 ) )
1082     {
1083         /* FIXME Make this configurable
1084         msg_Err( p_demux, "no multicast data received in 36s, aborting" );
1085         return 0;
1086         */
1087     }
1088     else if( !p_sys->b_multicast && p_sys->b_no_data &&
1089              ( p_sys->i_no_data_ti > 34 ) )
1090     {
1091         vlc_bool_t b_rtsp_tcp = var_GetBool( p_demux, "rtsp-tcp" ) ||
1092                                 var_GetBool( p_demux, "rtsp-http" );
1093
1094         if( !b_rtsp_tcp && p_sys->rtsp && p_sys->ms )
1095         {
1096             msg_Warn( p_demux, "no data received in 10s. Switching to TCP" );
1097             if( RollOverTcp( p_demux ) )
1098             {
1099                 msg_Err( p_demux, "TCP rollover failed, aborting" );
1100                 return 0;
1101             }
1102         }
1103         else if( p_sys->i_no_data_ti > 34 )
1104         {
1105             msg_Err( p_demux, "no data received in 10s, aborting" );
1106             return 0;
1107         }
1108     }
1109     else if( !p_sys->b_multicast && p_sys->b_no_data && p_sys->i_no_data_ti > 34 )
1110     {
1111         /* EOF ? */
1112         msg_Warn( p_demux, "no data received in 10s, eof ?" );
1113         return 0;
1114     }
1115     return p_demux->b_error ? 0 : 1;
1116 }
1117
1118 /*****************************************************************************
1119  * Control:
1120  *****************************************************************************/
1121 static int Control( demux_t *p_demux, int i_query, va_list args )
1122 {
1123     demux_sys_t *p_sys = p_demux->p_sys;
1124     int64_t *pi64;
1125     double  *pf, f;
1126     vlc_bool_t *pb, b_bool;
1127
1128     switch( i_query )
1129     {
1130         case DEMUX_GET_TIME:
1131             pi64 = (int64_t*)va_arg( args, int64_t * );
1132             if( p_sys->i_npt > 0 )
1133             {
1134                 *pi64 = p_sys->i_npt;
1135                 return VLC_SUCCESS;
1136             }
1137             return VLC_EGENERIC;
1138
1139         case DEMUX_GET_LENGTH:
1140             pi64 = (int64_t*)va_arg( args, int64_t * );
1141             if( p_sys->i_npt_length > 0 )
1142             {
1143                 *pi64 = p_sys->i_npt_length;
1144                 return VLC_SUCCESS;
1145             }
1146             return VLC_EGENERIC;
1147
1148         case DEMUX_GET_POSITION:
1149             pf = (double*)va_arg( args, double* );
1150             if( p_sys->i_npt_length > 0 && p_sys->i_npt > 0 )
1151             {
1152                 *pf = (double)p_sys->i_npt / (double)p_sys->i_npt_length;
1153                 return VLC_SUCCESS;
1154             }
1155             return VLC_EGENERIC;
1156
1157         case DEMUX_SET_POSITION:
1158         {
1159             float time;
1160
1161             f = (double)va_arg( args, double );
1162             if( p_sys->rtsp && p_sys->i_npt_length > 0 )
1163             {
1164                 int i;
1165                 time = f * (double)p_sys->i_npt_length / 1000000.0;   /* in second */
1166                 if( !p_sys->rtsp->playMediaSession( *p_sys->ms, time, -1, 1 ) )
1167                 {
1168                     msg_Err( p_demux, "PLAY failed %s",
1169                         p_sys->env->getResultMsg() );
1170                     return VLC_EGENERIC;
1171                 }
1172                 es_out_Control( p_demux->out, ES_OUT_RESET_PCR );
1173                 p_sys->i_pcr = 0;
1174 #if (LIVEMEDIA_LIBRARY_VERSION_INT >= 1195257600)
1175                 /* Retrieve RTP-Info values */
1176                 for( i = 0; i < p_sys->i_track; i++ )
1177                 {
1178                     p_sys->track[i]->i_pts = (int64_t) ( p_sys->track[i]->sub->rtpInfo.timestamp * (double)1000000.0 );
1179                     p_sys->track[i]->i_start_seq = p_sys->track[i]->sub->rtpInfo.seqNum;
1180                     msg_Info( p_demux, "set pos startseq: %u", p_sys->track[i]->i_start_seq );
1181                 }
1182 #endif
1183 #if (LIVEMEDIA_LIBRARY_VERSION_INT >= 9999999999)
1184                 /* Retrieve the starttime if possible */
1185                 p_sys->i_npt_start = (int64_t)( p_sys->ms->playStartTime() * (double)1000000.0 );
1186 #else
1187                 p_sys->i_npt_start = -1;
1188 #endif
1189                 if( p_sys->i_npt_start < 0 )
1190                 {
1191                     p_sys->i_npt_start = -1;
1192                     p_sys->i_npt = 0;
1193                 }
1194                 else
1195                     p_sys->i_npt = p_sys->i_npt_start;
1196
1197 #if (LIVEMEDIA_LIBRARY_VERSION_INT >= 9999999999)
1198                 /* Retrieve the duration if possible */
1199                 p_sys->i_npt_length = (int64_t)( p_sys->ms->playEndTime() * (double)1000000.0 );
1200 #else
1201                 p_sys->i_npt_length = -1;
1202 #endif
1203                 if( p_sys->i_npt_length < 0 )
1204                     p_sys->i_npt_length = -1;
1205
1206                 msg_Dbg( p_demux, "seek start: %lld stop:%lld", p_sys->i_npt_start, p_sys->i_npt_length );
1207                 return VLC_SUCCESS;
1208             }
1209             return VLC_EGENERIC;
1210         }
1211         /* Special for access_demux */
1212         case DEMUX_CAN_PAUSE:
1213             pb = (vlc_bool_t*)va_arg( args, vlc_bool_t * );
1214             if( p_sys->rtsp && p_sys->i_npt_length )
1215                 /* Not always true, but will be handled in SET_PAUSE_STATE */
1216                 *pb = VLC_TRUE;
1217             else
1218                 *pb = VLC_FALSE;
1219             return VLC_SUCCESS;
1220
1221         case DEMUX_CAN_CONTROL_PACE:
1222             pb = (vlc_bool_t*)va_arg( args, vlc_bool_t * );
1223
1224 #if 1       /* Disable for now until we have a clock synchro algo
1225              * which works with something else than MPEG over UDP */
1226             *pb = VLC_FALSE;
1227 #else
1228             *pb = VLC_TRUE;
1229 #endif
1230             return VLC_SUCCESS;
1231
1232         case DEMUX_SET_PAUSE_STATE:
1233         {
1234             double d_npt = (double) p_sys->i_npt / I64C(1000000);
1235             int i;
1236
1237             b_bool = (vlc_bool_t)va_arg( args, vlc_bool_t );
1238             if( p_sys->rtsp == NULL )
1239                 return VLC_EGENERIC;
1240
1241             /* FIXME */
1242             if( ( b_bool && !p_sys->rtsp->pauseMediaSession( *p_sys->ms ) ) ||
1243                     ( !b_bool && !p_sys->rtsp->playMediaSession( *p_sys->ms,
1244                       d_npt > 0 ? d_npt : -1 ) ) )
1245             {
1246                     msg_Err( p_demux, "PLAY or PAUSE failed %s", p_sys->env->getResultMsg() );
1247                     return VLC_EGENERIC;
1248             }
1249             es_out_Control( p_demux->out, ES_OUT_RESET_PCR );
1250             p_sys->i_pcr = 0;
1251 #if (LIVEMEDIA_LIBRARY_VERSION_INT >= 1195257600)
1252             for( i = 0; i < p_sys->i_track; i++ )
1253             {
1254                 p_sys->track[i]->i_pts = (int64_t) ( p_sys->track[i]->sub->rtpInfo.timestamp * (double)1000000.0 );
1255                 p_sys->track[i]->i_start_seq = p_sys->track[i]->sub->rtpInfo.seqNum;
1256                 msg_Info( p_demux, "set pause startseq: %u", p_sys->track[i]->i_start_seq );
1257             }
1258 #endif
1259 #if (LIVEMEDIA_LIBRARY_VERSION_INT >= 9999999999)
1260             /* Retrieve the starttime if possible */
1261             p_sys->i_npt_start = (int64_t)( p_sys->ms->playStartTime() * (double)1000000.0 );
1262 #else
1263             p_sys->i_npt_start = -1;
1264 #endif
1265             if( p_sys->i_npt_start < 0 )
1266             {
1267                 p_sys->i_npt_start = -1;
1268                 p_sys->i_npt = 0;
1269             }
1270             else
1271                 p_sys->i_npt = p_sys->i_npt_start;
1272
1273 #if (LIVEMEDIA_LIBRARY_VERSION_INT >= 9999999999)
1274             /* Retrieve the duration if possible */
1275             p_sys->i_npt_length = (int64_t)( p_sys->ms->playEndTime() * (double)1000000.0 );
1276 #else
1277             p_sys->i_npt_length = -1;
1278 #endif
1279             if( p_sys->i_npt_length < 0 )
1280                 p_sys->i_npt_length = -1;
1281
1282             msg_Dbg( p_demux, "pause start: %lld stop:%lld", p_sys->i_npt_start, p_sys->i_npt_length );
1283             return VLC_SUCCESS;
1284         }
1285         case DEMUX_GET_TITLE_INFO:
1286         case DEMUX_SET_TITLE:
1287         case DEMUX_SET_SEEKPOINT:
1288             return VLC_EGENERIC;
1289
1290         case DEMUX_GET_PTS_DELAY:
1291             pi64 = (int64_t*)va_arg( args, int64_t * );
1292             *pi64 = (int64_t)var_GetInteger( p_demux, "rtsp-caching" ) * 1000;
1293             return VLC_SUCCESS;
1294
1295         default:
1296             return VLC_EGENERIC;
1297     }
1298 }
1299
1300 /*****************************************************************************
1301  * RollOverTcp: reopen the rtsp into TCP mode
1302  * XXX: ugly, a lot of code are duplicated from Open()
1303  * This should REALLY be fixed
1304  *****************************************************************************/
1305 static int RollOverTcp( demux_t *p_demux )
1306 {
1307     demux_sys_t *p_sys = p_demux->p_sys;
1308     int i, i_return;
1309
1310     var_SetBool( p_demux, "rtsp-tcp", VLC_TRUE );
1311
1312     /* We close the old RTSP session */
1313     for( i = 0; i < p_sys->i_track; i++ )
1314     {
1315         live_track_t *tk = p_sys->track[i];
1316
1317         if( tk->b_muxed ) stream_DemuxDelete( tk->p_out_muxed );
1318         free( tk->p_buffer );
1319         free( tk );
1320     }
1321     if( p_sys->i_track ) free( p_sys->track );
1322     if( p_sys->p_out_asf ) stream_DemuxDelete( p_sys->p_out_asf );
1323
1324     p_sys->rtsp->teardownMediaSession( *p_sys->ms );
1325     Medium::close( p_sys->ms );
1326     RTSPClient::close( p_sys->rtsp );
1327
1328     p_sys->ms = NULL;
1329     p_sys->rtsp = NULL;
1330     p_sys->track = NULL;
1331     p_sys->i_track = 0;
1332
1333     /* Reopen rtsp client */
1334     if( ( p_demux->s != NULL ) &&
1335         ( i_return = Connect( p_demux ) ) != VLC_SUCCESS )
1336     {
1337         msg_Err( p_demux, "Failed to connect with rtsp://%s",
1338                  p_sys->psz_path );
1339         goto error;
1340     }
1341
1342     if( p_sys->p_sdp == NULL )
1343     {
1344         msg_Err( p_demux, "Failed to retrieve the RTSP Session Description" );
1345         goto error;
1346     }
1347
1348     if( ( i_return = SessionsSetup( p_demux ) ) != VLC_SUCCESS )
1349     {
1350         msg_Err( p_demux, "Nothing to play for rtsp://%s", p_sys->psz_path );
1351         goto error;
1352     }
1353
1354     if( ( i_return = Play( p_demux ) ) != VLC_SUCCESS )
1355         goto error;
1356
1357     return VLC_SUCCESS;
1358
1359 error:
1360     return VLC_EGENERIC;
1361 }
1362
1363
1364 /*****************************************************************************
1365  *
1366  *****************************************************************************/
1367 static void StreamRead( void *p_private, unsigned int i_size,
1368                         unsigned int i_truncated_bytes, struct timeval pts,
1369                         unsigned int duration )
1370 {
1371     live_track_t   *tk = (live_track_t*)p_private;
1372     demux_t        *p_demux = tk->p_demux;
1373     demux_sys_t    *p_sys = p_demux->p_sys;
1374     block_t        *p_block;
1375
1376     //msg_Dbg( p_demux, "pts: %d", pts.tv_sec );
1377
1378     int64_t i_pts = (uint64_t)pts.tv_sec * UI64C(1000000) +
1379         (uint64_t)pts.tv_usec;
1380
1381     /* XXX Beurk beurk beurk Avoid having negative value XXX */
1382     i_pts &= UI64C(0x00ffffffffffffff);
1383
1384     if( tk->b_quicktime && tk->p_es == NULL )
1385     {
1386         QuickTimeGenericRTPSource *qtRTPSource =
1387             (QuickTimeGenericRTPSource*)tk->sub->rtpSource();
1388         QuickTimeGenericRTPSource::QTState &qtState = qtRTPSource->qtState;
1389         uint8_t *sdAtom = (uint8_t*)&qtState.sdAtom[4];
1390
1391         if( tk->fmt.i_cat == VIDEO_ES ) {
1392             if( qtState.sdAtomSize < 16 + 32 )
1393             {
1394                 /* invalid */
1395                 p_sys->event = 0xff;
1396                 tk->waiting = 0;
1397                 return;
1398             }
1399             tk->fmt.i_codec = VLC_FOURCC(sdAtom[0],sdAtom[1],sdAtom[2],sdAtom[3]);
1400             tk->fmt.video.i_width  = (sdAtom[28] << 8) | sdAtom[29];
1401             tk->fmt.video.i_height = (sdAtom[30] << 8) | sdAtom[31];
1402
1403             if( tk->fmt.i_codec == VLC_FOURCC('a', 'v', 'c', '1') )
1404             {
1405                 uint8_t *pos = (uint8_t*)qtRTPSource->qtState.sdAtom + 86;
1406                 uint8_t *endpos = (uint8_t*)qtRTPSource->qtState.sdAtom
1407                                   + qtRTPSource->qtState.sdAtomSize;
1408                 while (pos+8 < endpos) {
1409                     unsigned atomLength = pos[0]<<24 | pos[1]<<16 | pos[2]<<8 | pos[3];
1410                     if( atomLength == 0 || atomLength > endpos-pos) break;
1411                     if( memcmp(pos+4, "avcC", 4) == 0 &&
1412                         atomLength > 8 &&
1413                         atomLength <= INT_MAX )
1414                     {
1415                         tk->fmt.i_extra = atomLength-8;
1416                         tk->fmt.p_extra = malloc( tk->fmt.i_extra );
1417                         memcpy(tk->fmt.p_extra, pos+8, atomLength-8);
1418                         break;
1419                     }
1420                     pos += atomLength;
1421                 }
1422             }
1423             else
1424             {
1425                 tk->fmt.i_extra        = qtState.sdAtomSize - 16;
1426                 tk->fmt.p_extra        = malloc( tk->fmt.i_extra );
1427                 memcpy( tk->fmt.p_extra, &sdAtom[12], tk->fmt.i_extra );
1428             }
1429         }
1430         else {
1431             if( qtState.sdAtomSize < 4 )
1432             {
1433                 /* invalid */
1434                 p_sys->event = 0xff;
1435                 tk->waiting = 0;
1436                 return;
1437             }
1438             tk->fmt.i_codec = VLC_FOURCC(sdAtom[0],sdAtom[1],sdAtom[2],sdAtom[3]);
1439         }
1440         tk->p_es = es_out_Add( p_demux->out, &tk->fmt );
1441     }
1442
1443 #if 0
1444     fprintf( stderr, "StreamRead size=%d pts=%lld\n",
1445              i_size,
1446              pts.tv_sec * 1000000LL + pts.tv_usec );
1447 #endif
1448
1449     /* grow buffer if it looks like buffer is too small, but don't eat
1450      * up all the memory on strange streams */
1451     if( i_truncated_bytes > 0 && tk->i_buffer < 2000000 )
1452     {
1453         void *p_tmp;
1454         msg_Dbg( p_demux, "lost %d bytes", i_truncated_bytes );
1455         msg_Dbg( p_demux, "increasing buffer size to %d", tk->i_buffer * 2 );
1456         tk->i_buffer *= 2;
1457         p_tmp = realloc( tk->p_buffer, tk->i_buffer );
1458         if( p_tmp == NULL )
1459         {
1460             msg_Warn( p_demux, "realloc failed" );
1461         }
1462         else
1463         {
1464             tk->p_buffer = (uint8_t*)p_tmp;
1465         }
1466     }
1467     if( i_size > tk->i_buffer )
1468     {
1469         msg_Warn( p_demux, "buffer overflow" );
1470     }
1471     /* FIXME could i_size be > buffer size ? */
1472     if( tk->fmt.i_codec == VLC_FOURCC('s','a','m','r') ||
1473         tk->fmt.i_codec == VLC_FOURCC('s','a','w','b') )
1474     {
1475         AMRAudioSource *amrSource = (AMRAudioSource*)tk->sub->readSource();
1476
1477         p_block = block_New( p_demux, i_size + 1 );
1478         p_block->p_buffer[0] = amrSource->lastFrameHeader();
1479         memcpy( p_block->p_buffer + 1, tk->p_buffer, i_size );
1480     }
1481     else if( tk->fmt.i_codec == VLC_FOURCC('H','2','6','1') )
1482     {
1483 #if LIVEMEDIA_LIBRARY_VERSION_INT >= 1081468800
1484         H261VideoRTPSource *h261Source = (H261VideoRTPSource*)tk->sub->rtpSource();
1485         uint32_t header = h261Source->lastSpecialHeader();
1486 #else
1487         uint32_t header = 0;
1488         msg_Warn( p_demux, "need livemedia library >= \"2004.04.09\"" );
1489 #endif
1490         p_block = block_New( p_demux, i_size + 4 );
1491         memcpy( p_block->p_buffer, &header, 4 );
1492         memcpy( p_block->p_buffer + 4, tk->p_buffer, i_size );
1493
1494         if( tk->sub->rtpSource()->curPacketMarkerBit() )
1495             p_block->i_flags |= BLOCK_FLAG_END_OF_FRAME;
1496     }
1497     else if( tk->fmt.i_codec == VLC_FOURCC('h','2','6','4') )
1498     {
1499         if( (tk->p_buffer[0] & 0x1f) >= 24 )
1500             msg_Warn( p_demux, "unsupported NAL type for H264" );
1501
1502         /* Normal NAL type */
1503         p_block = block_New( p_demux, i_size + 4 );
1504         p_block->p_buffer[0] = 0x00;
1505         p_block->p_buffer[1] = 0x00;
1506         p_block->p_buffer[2] = 0x00;
1507         p_block->p_buffer[3] = 0x01;
1508         memcpy( &p_block->p_buffer[4], tk->p_buffer, i_size );
1509     }
1510     else if( tk->b_asf )
1511     {
1512         int i_copy = __MIN( p_sys->asfh.i_min_data_packet_size, (int)i_size );
1513         p_block = block_New( p_demux, p_sys->asfh.i_min_data_packet_size );
1514
1515         memcpy( p_block->p_buffer, tk->p_buffer, i_copy );
1516     }
1517     else
1518     {
1519         p_block = block_New( p_demux, i_size );
1520         memcpy( p_block->p_buffer, tk->p_buffer, i_size );
1521     }
1522
1523     /* Update NPT */
1524     //msg_Dbg( p_demux, "current %d, start_seq %u", (int)tk->sub->rtpSource()->curPacketRTPSeqNum(), tk->i_start_seq );
1525     if( (tk->fmt.i_cat == VIDEO_ES) && (p_sys->i_pcr < i_pts) &&
1526         (i_pts > 0) && (p_sys->i_pcr > 0) )
1527     {
1528         p_sys->i_npt += __MAX( 0, i_pts - p_sys->i_pcr );
1529         p_sys->i_pcr = i_pts;
1530         //msg_Dbg( p_demux, "npt update" );
1531     }
1532     else if( /*tk->fmt.i_cat == VIDEO_ES &&*/ p_sys->i_pcr < i_pts )
1533     {
1534         p_sys->i_pcr = i_pts;
1535     }
1536     //msg_Dbg( p_demux, "npt %lld", p_sys->i_npt );
1537
1538     if( (i_pts != tk->i_pts) && (!tk->b_muxed) )
1539     {
1540         p_block->i_dts = ( tk->fmt.i_cat == VIDEO_ES ) ? 0 : i_pts;
1541         p_block->i_pts = i_pts;
1542     }
1543
1544     if( tk->b_muxed )
1545     {
1546         stream_DemuxSend( tk->p_out_muxed, p_block );
1547     }
1548     else if( tk->b_asf )
1549     {
1550         stream_DemuxSend( p_sys->p_out_asf, p_block );
1551     }
1552     else
1553     {
1554         es_out_Send( p_demux->out, tk->p_es, p_block );
1555     }
1556
1557     /* warn that's ok */
1558     p_sys->event = 0xff;
1559
1560     /* we have read data */
1561     tk->waiting = 0;
1562     p_demux->p_sys->b_no_data = VLC_FALSE;
1563     p_demux->p_sys->i_no_data_ti = 0;
1564
1565     if( i_pts > 0 && !tk->b_muxed )
1566     {
1567         tk->i_pts = i_pts;
1568     }
1569 }
1570
1571 /*****************************************************************************
1572  *
1573  *****************************************************************************/
1574 static void StreamClose( void *p_private )
1575 {
1576     live_track_t   *tk = (live_track_t*)p_private;
1577     demux_t        *p_demux = tk->p_demux;
1578     demux_sys_t    *p_sys = p_demux->p_sys;
1579
1580     msg_Dbg( p_demux, "StreamClose" );
1581
1582     p_sys->event = 0xff;
1583     p_demux->b_error = VLC_TRUE;
1584 }
1585
1586
1587 /*****************************************************************************
1588  *
1589  *****************************************************************************/
1590 static void TaskInterrupt( void *p_private )
1591 {
1592     demux_t *p_demux = (demux_t*)p_private;
1593
1594     p_demux->p_sys->i_no_data_ti++;
1595
1596     /* Avoid lock */
1597     p_demux->p_sys->event = 0xff;
1598 }
1599
1600 /*****************************************************************************
1601  *
1602  *****************************************************************************/
1603 static void TimeoutPrevention( timeout_thread_t *p_timeout )
1604 {
1605     p_timeout->b_die = VLC_FALSE;
1606     p_timeout->i_remain = (int64_t)p_timeout->p_sys->i_timeout -2;
1607     p_timeout->i_remain *= 1000000;
1608
1609     vlc_thread_ready( p_timeout );
1610
1611     /* Avoid lock */
1612     while( !p_timeout->b_die )
1613     {
1614         if( p_timeout->i_remain <= 0 )
1615         {
1616             p_timeout->i_remain = (int64_t)p_timeout->p_sys->i_timeout -2;
1617             p_timeout->i_remain *= 1000000;
1618             p_timeout->p_sys->b_timeout_call = VLC_TRUE;
1619             msg_Dbg( p_timeout, "reset the timeout timer" );
1620         }
1621         p_timeout->i_remain -= 200000;
1622         msleep( 200000 ); /* 200 ms */
1623     }
1624 }
1625
1626 /*****************************************************************************
1627  *
1628  *****************************************************************************/
1629 static int b64_decode( char *dest, char *src );
1630
1631 static int ParseASF( demux_t *p_demux )
1632 {
1633     demux_sys_t    *p_sys = p_demux->p_sys;
1634
1635     const char *psz_marker = "a=pgmpu:data:application/vnd.ms.wms-hdr.asfv1;base64,";
1636     char *psz_asf = strcasestr( p_sys->p_sdp, psz_marker );
1637     char *psz_end;
1638     block_t *p_header;
1639
1640     /* Parse the asf header */
1641     if( psz_asf == NULL )
1642         return VLC_EGENERIC;
1643
1644     psz_asf += strlen( psz_marker );
1645     psz_asf = strdup( psz_asf );    /* Duplicate it */
1646     psz_end = strchr( psz_asf, '\n' );
1647
1648     while( psz_end > psz_asf && ( *psz_end == '\n' || *psz_end == '\r' ) )
1649         *psz_end-- = '\0';
1650
1651     if( psz_asf >= psz_end )
1652     {
1653         free( psz_asf );
1654         return VLC_EGENERIC;
1655     }
1656
1657     /* Always smaller */
1658     p_header = block_New( p_demux, psz_end - psz_asf );
1659     p_header->i_buffer = b64_decode( (char*)p_header->p_buffer, psz_asf );
1660     //msg_Dbg( p_demux, "Size=%d Hdrb64=%s", p_header->i_buffer, psz_asf );
1661     if( p_header->i_buffer <= 0 )
1662     {
1663         free( psz_asf );
1664         return VLC_EGENERIC;
1665     }
1666
1667     /* Parse it to get packet size */
1668     E_(asf_HeaderParse)( &p_sys->asfh, p_header->p_buffer, p_header->i_buffer );
1669
1670     /* Send it to demuxer */
1671     stream_DemuxSend( p_sys->p_out_asf, p_header );
1672
1673     free( psz_asf );
1674     return VLC_SUCCESS;
1675 }
1676
1677
1678 static unsigned char* parseH264ConfigStr( char const* configStr,
1679                                           unsigned int& configSize )
1680 {
1681     char *dup, *psz;
1682     int i, i_records = 1;
1683
1684     if( configSize )
1685     configSize = 0;
1686
1687     if( configStr == NULL || *configStr == '\0' )
1688         return NULL;
1689
1690     psz = dup = strdup( configStr );
1691
1692     /* Count the number of comma's */
1693     for( psz = dup; *psz != '\0'; ++psz )
1694     {
1695         if( *psz == ',')
1696         {
1697             ++i_records;
1698             *psz = '\0';
1699         }
1700     }
1701
1702     unsigned char *cfg = new unsigned char[5 * strlen(dup)];
1703     psz = dup;
1704     for( i = 0; i < i_records; i++ )
1705     {
1706         cfg[configSize++] = 0x00;
1707         cfg[configSize++] = 0x00;
1708         cfg[configSize++] = 0x00;
1709         cfg[configSize++] = 0x01;
1710
1711         configSize += b64_decode( (char*)&cfg[configSize], psz );
1712         psz += strlen(psz)+1;
1713     }
1714
1715     if( dup ) free( dup );
1716     return cfg;
1717 }
1718
1719 /*char b64[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";*/
1720 static int b64_decode( char *dest, char *src )
1721 {
1722     const char *dest_start = dest;
1723     int  i_level;
1724     int  last = 0;
1725     int  b64[256] = {
1726         -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,  /* 00-0F */
1727         -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,  /* 10-1F */
1728         -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,62,-1,-1,-1,63,  /* 20-2F */
1729         52,53,54,55,56,57,58,59,60,61,-1,-1,-1,-1,-1,-1,  /* 30-3F */
1730         -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,10,11,12,13,14,  /* 40-4F */
1731         15,16,17,18,19,20,21,22,23,24,25,-1,-1,-1,-1,-1,  /* 50-5F */
1732         -1,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,  /* 60-6F */
1733         41,42,43,44,45,46,47,48,49,50,51,-1,-1,-1,-1,-1,  /* 70-7F */
1734         -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,  /* 80-8F */
1735         -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,  /* 90-9F */
1736         -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,  /* A0-AF */
1737         -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,  /* B0-BF */
1738         -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,  /* C0-CF */
1739         -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,  /* D0-DF */
1740         -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,  /* E0-EF */
1741         -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1   /* F0-FF */
1742         };
1743
1744     for( i_level = 0; *src != '\0'; src++ )
1745     {
1746         int  c;
1747
1748         c = b64[(unsigned int)*src];
1749         if( c == -1 )
1750         {
1751             continue;
1752         }
1753
1754         switch( i_level )
1755         {
1756             case 0:
1757                 i_level++;
1758                 break;
1759             case 1:
1760                 *dest++ = ( last << 2 ) | ( ( c >> 4)&0x03 );
1761                 i_level++;
1762                 break;
1763             case 2:
1764                 *dest++ = ( ( last << 4 )&0xf0 ) | ( ( c >> 2 )&0x0f );
1765                 i_level++;
1766                 break;
1767             case 3:
1768                 *dest++ = ( ( last &0x03 ) << 6 ) | c;
1769                 i_level = 0;
1770         }
1771         last = c;
1772     }
1773
1774     *dest = '\0';
1775
1776     return dest - dest_start;
1777 }