git.sesse.net Git - vlc/blob - 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 #include <stdlib.h>                                      /* malloc(), free() */
  32 #include <string.h>
  33
  34 #include <vlc_demux.h>
  35 #include <vlc_interface.h>
  36 #include <vlc_network.h>
  37
  38 #include <iostream>
  39
  40 #if defined( WIN32 )
  41 #   include <winsock2.h>
  42 #endif
  43
  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
 157     MediaSession     *ms;
 158     TaskScheduler    *scheduler;
 159     UsageEnvironment *env ;
 160     RTSPClient       *rtsp;
 161
 162     /* */
 163     int              i_track;
 164     live_track_t     **track;   /* XXX mallocated */
 165
 166     /* Weird formats */
 167     asf_header_t     asfh;
 168     stream_t         *p_out_asf;
 169     vlc_bool_t       b_real;
 170
 171     /* */
 172     int64_t          i_pcr; /* The clock */
 173     int64_t          i_npt; /* The current time in the stream */
 174     int64_t          i_npt_length;
 175     int64_t          i_npt_start;
 176
 177     /* timeout thread information */
 178     int              i_timeout;     /* session timeout value in seconds */
 179     vlc_bool_t       b_timeout_call;/* mark to send an RTSP call to prevent server timeout */
 180     timeout_thread_t *p_timeout;    /* the actual thread that makes sure we don't timeout */
 181
 182     /* */
 183     vlc_bool_t       b_multicast;   /* true if one of the tracks is multicasted */
 184     vlc_bool_t       b_no_data;     /* true if we never receive any data */
 185     int              i_no_data_ti;  /* consecutive number of TaskInterrupt */
 186
 187     char             event;
 188 };
 189
 190 static int Demux  ( demux_t * );
 191 static int Control( demux_t *, int, va_list );
 192
 193 static int Connect      ( demux_t * );
 194 static int SessionsSetup( demux_t * );
 195 static int Play         ( demux_t *);
 196 static int ParseASF     ( demux_t * );
 197 static int RollOverTcp  ( demux_t * );
 198
 199 static void StreamRead  ( void *, unsigned int, unsigned int,
 200                           struct timeval, unsigned int );
 201 static void StreamClose ( void * );
 202 static void TaskInterrupt( void * );
 203
 204 static void TimeoutPrevention( timeout_thread_t * );
 205
 206 static unsigned char* parseH264ConfigStr( char const* configStr,
 207                                           unsigned int& configSize );
 208
 209 /*****************************************************************************
 210  * DemuxOpen:
 211  *****************************************************************************/
 212 static int  Open ( vlc_object_t *p_this )
 213 {
 214     demux_t     *p_demux = (demux_t*)p_this;
 215     demux_sys_t *p_sys = NULL;
 216
 217     MediaSubsessionIterator *iter   = NULL;
 218     MediaSubsession         *sub    = NULL;
 219     int i, i_return;
 220
 221     if( p_demux->s )
 222     {
 223         /* See if it looks like a SDP
 224            v, o, s fields are mandatory and in this order */
 225         uint8_t *p_peek;
 226         if( stream_Peek( p_demux->s, &p_peek, 7 ) < 7 ) return VLC_EGENERIC;
 227
 228         if( memcmp( (char*)p_peek, "v=0\r\n", 5 ) &&
 229             memcmp( (char*)p_peek, "v=0\n", 4 ) &&
 230             ( p_peek[0] < 'a' || p_peek[0] > 'z' || p_peek[1] != '=' ) )
 231         {
 232             return VLC_EGENERIC;
 233         }
 234     }
 235     else
 236     {
 237         var_Create( p_demux, "rtsp-caching", VLC_VAR_INTEGER|VLC_VAR_DOINHERIT );
 238     }
 239
 240     p_demux->pf_demux  = Demux;
 241     p_demux->pf_control= Control;
 242     p_demux->p_sys     = p_sys = (demux_sys_t*)malloc( sizeof( demux_sys_t ) );
 243     if( !p_sys ) return VLC_ENOMEM;
 244
 245     p_sys->p_sdp = NULL;
 246     p_sys->scheduler = NULL;
 247     p_sys->env = NULL;
 248     p_sys->ms = NULL;
 249     p_sys->rtsp = NULL;
 250     p_sys->i_track = 0;
 251     p_sys->track   = NULL;
 252     p_sys->i_pcr = 0;
 253     p_sys->i_npt = 0;
 254     p_sys->i_npt_start = 0;
 255     p_sys->i_npt_length = 0;
 256     p_sys->p_out_asf = NULL;
 257     p_sys->b_no_data = VLC_TRUE;
 258     p_sys->i_no_data_ti = 0;
 259     p_sys->p_timeout = NULL;
 260     p_sys->i_timeout = 0;
 261     p_sys->b_timeout_call = VLC_FALSE;
 262     p_sys->b_multicast = VLC_FALSE;
 263     p_sys->b_real = VLC_FALSE;
 264     p_sys->psz_path = strdup( p_demux->psz_path );
 265
 266     if( ( p_sys->scheduler = BasicTaskScheduler::createNew() ) == NULL )
 267     {
 268         msg_Err( p_demux, "BasicTaskScheduler::createNew failed" );
 269         goto error;
 270     }
 271     if( !( p_sys->env = BasicUsageEnvironment::createNew(*p_sys->scheduler) ) )
 272     {
 273         msg_Err( p_demux, "BasicUsageEnvironment::createNew failed" );
 274         goto error;
 275     }
 276
 277     if( strcasecmp( p_demux->psz_access, "sdp" ) )
 278     {
 279         char *p = p_sys->psz_path;
 280         while( (p = strchr( p, ' ' )) != NULL ) *p = '+';
 281     }
 282
 283     if( p_demux->s != NULL )
 284     {
 285         /* Gather the complete sdp file */
 286         int     i_sdp       = 0;
 287         int     i_sdp_max   = 1000;
 288         uint8_t *p_sdp      = (uint8_t*) malloc( i_sdp_max );
 289
 290         for( ;; )
 291         {
 292             int i_read = stream_Read( p_demux->s, &p_sdp[i_sdp],
 293                                       i_sdp_max - i_sdp - 1 );
 294
 295             if( i_read < 0 )
 296             {
 297                 msg_Err( p_demux, "failed to read SDP" );
 298                 free( p_sys );
 299                 return VLC_EGENERIC;
 300             }
 301
 302             i_sdp += i_read;
 303
 304             if( i_read < i_sdp_max - i_sdp - 1 )
 305             {
 306                 p_sdp[i_sdp] = '\0';
 307                 break;
 308             }
 309
 310             i_sdp_max += 1000;
 311             p_sdp = (uint8_t*)realloc( p_sdp, i_sdp_max );
 312         }
 313         p_sys->p_sdp = (char*)p_sdp;
 314     }
 315     else if( p_demux->s == NULL && !strcasecmp( p_demux->psz_access, "sdp" ) )
 316     {
 317         /* sdp:// link from SAP */
 318         p_sys->p_sdp = strdup( p_sys->psz_path );
 319     }
 320     else if( ( i_return = Connect( p_demux ) ) != VLC_SUCCESS )
 321     {
 322         msg_Err( p_demux, "Failed to connect with rtsp://%s", p_sys->psz_path );
 323         goto error;
 324     }
 325
 326     if( p_sys->p_sdp == NULL )
 327     {
 328         msg_Err( p_demux, "Failed to retrieve the RTSP Session Description" );
 329         goto error;
 330     }
 331
 332     if( ( i_return = SessionsSetup( p_demux ) ) != VLC_SUCCESS )
 333     {
 334         msg_Err( p_demux, "Nothing to play for rtsp://%s", p_sys->psz_path );
 335         goto error;
 336     }
 337
 338     if( p_sys->b_real ) goto error;
 339
 340     if( ( i_return = Play( p_demux ) ) != VLC_SUCCESS )
 341         goto error;
 342
 343     if( p_sys->p_out_asf && ParseASF( p_demux ) )
 344     {
 345         msg_Err( p_demux, "cannot find a usable asf header" );
 346         /* TODO Clean tracks */
 347         goto error;
 348     }
 349
 350     if( p_sys->i_track <= 0 )
 351         goto error;
 352
 353     return VLC_SUCCESS;
 354
 355 error:
 356     for( i = 0; i < p_sys->i_track; i++ )
 357     {
 358         live_track_t *tk = p_sys->track[i];
 359
 360         if( tk->b_muxed ) stream_DemuxDelete( tk->p_out_muxed );
 361         free( tk->p_buffer );
 362         free( tk );
 363     }
 364
 365     if( p_sys->i_track ) free( p_sys->track );
 366     if( p_sys->p_out_asf ) stream_DemuxDelete( p_sys->p_out_asf );
 367     if( p_sys->rtsp && p_sys->ms ) p_sys->rtsp->teardownMediaSession( *p_sys->ms );
 368     if( p_sys->ms ) Medium::close( p_sys->ms );
 369     if( p_sys->rtsp ) RTSPClient::close( p_sys->rtsp );
 370     if( p_sys->env ) p_sys->env->reclaim();
 371     if( p_sys->p_timeout )
 372     {
 373         p_sys->p_timeout->b_die = VLC_TRUE;
 374         vlc_thread_join( p_sys->p_timeout );
 375         vlc_object_detach( p_sys->p_timeout );
 376         vlc_object_destroy( p_sys->p_timeout );
 377     }
 378     if( p_sys->scheduler ) delete p_sys->scheduler;
 379     if( p_sys->p_sdp ) free( p_sys->p_sdp );
 380     if( p_sys->psz_path ) free( p_sys->psz_path );
 381
 382     free( p_sys );
 383     return VLC_EGENERIC;
 384 }
 385
 386 /*****************************************************************************
 387  * DemuxClose:
 388  *****************************************************************************/
 389 static void Close( vlc_object_t *p_this )
 390 {
 391     demux_t *p_demux = (demux_t*)p_this;
 392     demux_sys_t *p_sys = p_demux->p_sys;
 393     int i;
 394
 395     for( i = 0; i < p_sys->i_track; i++ )
 396     {
 397         live_track_t *tk = p_sys->track[i];
 398
 399         if( tk->b_muxed ) stream_DemuxDelete( tk->p_out_muxed );
 400         free( tk->p_buffer );
 401         free( tk );
 402     }
 403
 404     if( p_sys->i_track ) free( p_sys->track );
 405     if( p_sys->p_out_asf ) stream_DemuxDelete( p_sys->p_out_asf );
 406     if( p_sys->rtsp && p_sys->ms ) p_sys->rtsp->teardownMediaSession( *p_sys->ms );
 407     if( p_sys->ms ) Medium::close( p_sys->ms );
 408     if( p_sys->rtsp ) RTSPClient::close( p_sys->rtsp );
 409     if( p_sys->env ) p_sys->env->reclaim();
 410     if( p_sys->p_timeout )
 411     {
 412         p_sys->p_timeout->b_die = VLC_TRUE;
 413         vlc_thread_join( p_sys->p_timeout );
 414         vlc_object_detach( p_sys->p_timeout );
 415         vlc_object_destroy( p_sys->p_timeout );
 416     }
 417     if( p_sys->scheduler ) delete p_sys->scheduler;
 418     if( p_sys->p_sdp ) free( p_sys->p_sdp );
 419     if( p_sys->psz_path ) free( p_sys->psz_path );
 420
 421     free( p_sys );
 422 }
 423
 424 /*****************************************************************************
 425  * Connect: connects to the RTSP server to setup the session DESCRIBE
 426  *****************************************************************************/
 427 static int Connect( demux_t *p_demux )
 428 {
 429     demux_sys_t *p_sys = p_demux->p_sys;
 430     Authenticator authenticator;
 431
 432     char *psz_user    = NULL;
 433     char *psz_pwd     = NULL;
 434     char *psz_url     = NULL;
 435     char *psz_options = NULL;
 436     char *p_sdp       = NULL;
 437     int  i_http_port  = 0;
 438     int  i_ret        = VLC_SUCCESS;
 439
 440 createnew:
 441     if( var_CreateGetBool( p_demux, "rtsp-http" ) )
 442         i_http_port = var_CreateGetInteger( p_demux, "rtsp-http-port" );
 443
 444     if( ( p_sys->rtsp = RTSPClient::createNew(*p_sys->env, 1 /*verbose*/,
 445           "VLC media player", i_http_port ) ) == NULL )
 446     {
 447         msg_Err( p_demux, "RTSPClient::createNew failed (%s)",
 448                  p_sys->env->getResultMsg() );
 449         return VLC_EGENERIC;
 450     }
 451     psz_url = (char*)malloc( strlen( p_sys->psz_path ) + 8 );
 452     sprintf( psz_url, "rtsp://%s", p_sys->psz_path );
 453
 454     psz_options = p_sys->rtsp->sendOptionsCmd( psz_url );
 455     if( psz_options ) delete [] psz_options;
 456
 457     psz_user = var_CreateGetString( p_demux, "rtsp-user" );
 458     psz_pwd  = var_CreateGetString( p_demux, "rtsp-pwd" );
 459
 460 describe:
 461     authenticator.setUsernameAndPassword( (const char*)psz_user, (const char*)psz_pwd );
 462     p_sdp = p_sys->rtsp->describeURL( psz_url,
 463                 &authenticator, var_CreateGetBool( p_demux, "rtsp-kasenna" ) );
 464
 465     if( psz_user ) free( psz_user );
 466     if( psz_pwd ) free( psz_pwd );
 467
 468     if( p_sdp == NULL )
 469     {
 470         /* failure occurred */
 471         int i_code = 0;
 472         const char *psz_error = p_sys->env->getResultMsg();
 473
 474         msg_Dbg( p_demux, "DESCRIBE failed with %d: %s", i_code, psz_error );
 475         sscanf( psz_error, "%*sRTSP/%*s%3u", &i_code );
 476
 477         if( i_code == 401 )
 478         {
 479             char *psz_login = NULL; char *psz_password = NULL;
 480             msg_Dbg( p_demux, "authentication failed" );
 481
 482             i_ret = intf_UserLoginPassword( p_demux, _("RTSP authentication"),
 483                            _("Please enter a valid login name and a password."),
 484                                                    &psz_login, &psz_password );
 485             if( i_ret == DIALOG_OK_YES )
 486             {
 487                msg_Dbg( p_demux, "retrying with user=%s, pwd=%s",
 488                            psz_login, psz_password );
 489                if( psz_login ) psz_user = psz_login;
 490                if( psz_password ) psz_pwd = psz_password;
 491                goto describe;
 492             }
 493             if( psz_login ) free( psz_login );
 494             if( psz_password ) free( psz_password );
 495         }
 496         else if( !var_CreateGetBool( p_demux, "rtsp-http" ) )
 497         {
 498             /* Perhaps a firewall is being annoying. Try HTTP tunneling mode */
 499             vlc_value_t val;
 500             val.b_bool = VLC_TRUE;
 501             msg_Dbg( p_demux, "we will now try HTTP tunneling mode" );
 502             var_Set( p_demux, "rtsp-http", val );
 503             if( psz_url ) free( psz_url );
 504             if( p_sys->rtsp ) RTSPClient::close( p_sys->rtsp );
 505             goto createnew;
 506         }
 507         i_ret = VLC_EGENERIC;
 508     }
 509     if( psz_url ) free( psz_url );
 510
 511     /* malloc-ated copy */
 512     if( p_sys->p_sdp ) free( p_sys->p_sdp );
 513     if( p_sdp ) p_sys->p_sdp = strdup( (char*)p_sdp );
 514     delete[] p_sdp;
 515
 516     return i_ret;
 517 }
 518
 519 /*****************************************************************************
 520  * Connect: prepares the subsessions and does the SETUP
 521  *****************************************************************************/
 522 static int SessionsSetup( demux_t *p_demux )
 523 {
 524     demux_sys_t             *p_sys  = p_demux->p_sys;
 525     MediaSubsessionIterator *iter   = NULL;
 526     MediaSubsession         *sub    = NULL;
 527
 528     vlc_bool_t     b_rtsp_tcp = VLC_FALSE;
 529     int            i_client_port;
 530     int            i_return = VLC_SUCCESS;
 531     unsigned int   i_buffer = 0;
 532     unsigned const thresh = 200000; /* RTP reorder threshold .2 second (default .1) */
 533
 534     b_rtsp_tcp    = var_CreateGetBool( p_demux, "rtsp-tcp" );
 535     i_client_port = var_CreateGetInteger( p_demux, "rtp-client-port" );
 536
 537     /* Create the session from the SDP */
 538     if( !( p_sys->ms = MediaSession::createNew( *p_sys->env, p_sys->p_sdp ) ) )
 539     {
 540         msg_Err( p_demux, "Could not create the RTSP Session: %s",
 541             p_sys->env->getResultMsg() );
 542         return VLC_EGENERIC;
 543     }
 544
 545     /* Initialise each media subsession */
 546     iter = new MediaSubsessionIterator( *p_sys->ms );
 547     while( ( sub = iter->next() ) != NULL )
 548     {
 549         Boolean bInit;
 550         live_track_t *tk;
 551
 552         /* Value taken from mplayer */
 553         if( !strcmp( sub->mediumName(), "audio" ) )
 554             i_buffer = 100000;
 555         else if( !strcmp( sub->mediumName(), "video" ) )
 556             i_buffer = 2000000;
 557         else continue;
 558
 559         if( i_client_port != -1 )
 560         {
 561             sub->setClientPortNum( i_client_port );
 562             i_client_port += 2;
 563         }
 564
 565         if( strcasestr( sub->codecName(), "REAL" ) )
 566         {
 567             msg_Info( p_demux, "real codec detected, using real-RTSP instead" );
 568             p_sys->b_real = VLC_TRUE; /* This is a problem, we'll handle it later */
 569             continue;
 570         }
 571
 572         if( !strcmp( sub->codecName(), "X-ASF-PF" ) )
 573             bInit = sub->initiate( 4 ); /* Constant ? */
 574         else
 575             bInit = sub->initiate();
 576
 577         if( !bInit )
 578         {
 579             msg_Warn( p_demux, "RTP subsession '%s/%s' failed (%s)",
 580                       sub->mediumName(), sub->codecName(),
 581                       p_sys->env->getResultMsg() );
 582         }
 583         else
 584         {
 585             if( sub->rtpSource() != NULL )
 586             {
 587                 int fd = sub->rtpSource()->RTPgs()->socketNum();
 588
 589                 /* Increase the buffer size */
 590                 if( i_buffer > 0 )
 591                     increaseReceiveBufferTo( *p_sys->env, fd, i_buffer );
 592
 593                 /* Increase the RTP reorder timebuffer just a bit */
 594                 sub->rtpSource()->setPacketReorderingThresholdTime(thresh);
 595             }
 596             msg_Dbg( p_demux, "RTP subsession '%s/%s'", sub->mediumName(),
 597                      sub->codecName() );
 598
 599             /* Issue the SETUP */
 600             if( p_sys->rtsp )
 601             {
 602                 if( !( p_sys->rtsp->setupMediaSubsession( *sub, False,
 603                                                    b_rtsp_tcp ? True : False ) ) )
 604                 {
 605                     msg_Err( p_demux, "SETUP of'%s/%s' failed %s", sub->mediumName(),
 606                              sub->codecName(), p_sys->env->getResultMsg() );
 607                     continue;
 608                 }
 609             }
 610
 611             /* Check if we will receive data from this subsession for this track */
 612             if( sub->readSource() == NULL ) continue;
 613             if( !p_sys->b_multicast )
 614             {
 615                 /* Check, because we need diff. rollover behaviour for multicast */
 616                 p_sys->b_multicast = IsMulticastAddress( sub->connectionEndpointAddress() );
 617             }
 618
 619             tk = (live_track_t*)malloc( sizeof( live_track_t ) );
 620             tk->p_demux     = p_demux;
 621             tk->sub         = sub;
 622             tk->p_es        = NULL;
 623             tk->b_quicktime = VLC_FALSE;
 624             tk->b_asf       = VLC_FALSE;
 625             tk->b_muxed     = VLC_FALSE;
 626             tk->p_out_muxed = NULL;
 627             tk->waiting     = 0;
 628             tk->b_rtcp_sync = VLC_FALSE;
 629             tk->i_pts       = 0;
 630             tk->i_buffer    = 65536;
 631             tk->p_buffer    = (uint8_t *)malloc( 65536 );
 632
 633             /* Value taken from mplayer */
 634             if( !strcmp( sub->mediumName(), "audio" ) )
 635             {
 636                 es_format_Init( &tk->fmt, AUDIO_ES, VLC_FOURCC('u','n','d','f') );
 637                 tk->fmt.audio.i_channels = sub->numChannels();
 638                 tk->fmt.audio.i_rate = sub->rtpTimestampFrequency();
 639
 640                 if( !strcmp( sub->codecName(), "MPA" ) ||
 641                     !strcmp( sub->codecName(), "MPA-ROBUST" ) ||
 642                     !strcmp( sub->codecName(), "X-MP3-DRAFT-00" ) )
 643                 {
 644                     tk->fmt.i_codec = VLC_FOURCC( 'm', 'p', 'g', 'a' );
 645                     tk->fmt.audio.i_rate = 0;
 646                 }
 647                 else if( !strcmp( sub->codecName(), "AC3" ) )
 648                 {
 649                     tk->fmt.i_codec = VLC_FOURCC( 'a', '5', '2', ' ' );
 650                     tk->fmt.audio.i_rate = 0;
 651                 }
 652                 else if( !strcmp( sub->codecName(), "L16" ) )
 653                 {
 654                     tk->fmt.i_codec = VLC_FOURCC( 't', 'w', 'o', 's' );
 655                     tk->fmt.audio.i_bitspersample = 16;
 656                 }
 657                 else if( !strcmp( sub->codecName(), "L8" ) )
 658                 {
 659                     tk->fmt.i_codec = VLC_FOURCC( 'a', 'r', 'a', 'w' );
 660                     tk->fmt.audio.i_bitspersample = 8;
 661                 }
 662                 else if( !strcmp( sub->codecName(), "PCMU" ) )
 663                 {
 664                     tk->fmt.i_codec = VLC_FOURCC( 'u', 'l', 'a', 'w' );
 665                 }
 666                 else if( !strcmp( sub->codecName(), "PCMA" ) )
 667                 {
 668                     tk->fmt.i_codec = VLC_FOURCC( 'a', 'l', 'a', 'w' );
 669                 }
 670                 else if( !strncmp( sub->codecName(), "G726", 4 ) )
 671                 {
 672                     tk->fmt.i_codec = VLC_FOURCC( 'g', '7', '2', '6' );
 673                     tk->fmt.audio.i_rate = 8000;
 674                     tk->fmt.audio.i_channels = 1;
 675                     if( !strcmp( sub->codecName()+5, "40" ) )
 676                         tk->fmt.i_bitrate = 40000;
 677                     else if( !strcmp( sub->codecName()+5, "32" ) )
 678                         tk->fmt.i_bitrate = 32000;
 679                     else if( !strcmp( sub->codecName()+5, "24" ) )
 680                         tk->fmt.i_bitrate = 24000;
 681                     else if( !strcmp( sub->codecName()+5, "16" ) )
 682                         tk->fmt.i_bitrate = 16000;
 683                 }
 684                 else if( !strcmp( sub->codecName(), "AMR" ) )
 685                 {
 686                     tk->fmt.i_codec = VLC_FOURCC( 's', 'a', 'm', 'r' );
 687                 }
 688                 else if( !strcmp( sub->codecName(), "AMR-WB" ) )
 689                 {
 690                     tk->fmt.i_codec = VLC_FOURCC( 's', 'a', 'w', 'b' );
 691                 }
 692                 else if( !strcmp( sub->codecName(), "MP4A-LATM" ) )
 693                 {
 694                     unsigned int i_extra;
 695                     uint8_t      *p_extra;
 696
 697                     tk->fmt.i_codec = VLC_FOURCC( 'm', 'p', '4', 'a' );
 698
 699                     if( ( p_extra = parseStreamMuxConfigStr( sub->fmtp_config(),
 700                                                              i_extra ) ) )
 701                     {
 702                         tk->fmt.i_extra = i_extra;
 703                         tk->fmt.p_extra = malloc( i_extra );
 704                         memcpy( tk->fmt.p_extra, p_extra, i_extra );
 705                         delete[] p_extra;
 706                     }
 707                     /* Because the "faad" decoder does not handle the LATM data length field
 708                        at the start of each returned LATM frame, tell the RTP source to omit it. */
 709                     ((MPEG4LATMAudioRTPSource*)sub->rtpSource())->omitLATMDataLengthField();
 710                 }
 711                 else if( !strcmp( sub->codecName(), "MPEG4-GENERIC" ) )
 712                 {
 713                     unsigned int i_extra;
 714                     uint8_t      *p_extra;
 715
 716                     tk->fmt.i_codec = VLC_FOURCC( 'm', 'p', '4', 'a' );
 717
 718                     if( ( p_extra = parseGeneralConfigStr( sub->fmtp_config(),
 719                                                            i_extra ) ) )
 720                     {
 721                         tk->fmt.i_extra = i_extra;
 722                         tk->fmt.p_extra = malloc( i_extra );
 723                         memcpy( tk->fmt.p_extra, p_extra, i_extra );
 724                         delete[] p_extra;
 725                     }
 726                 }
 727                 else if( !strcmp( sub->codecName(), "X-ASF-PF" ) )
 728                 {
 729                     tk->b_asf = VLC_TRUE;
 730                     if( p_sys->p_out_asf == NULL )
 731                         p_sys->p_out_asf = stream_DemuxNew( p_demux, "asf",
 732                                                             p_demux->out );
 733                 }
 734                 else if( !strcmp( sub->codecName(), "X-QT" ) ||
 735                          !strcmp( sub->codecName(), "X-QUICKTIME" ) )
 736                 {
 737                     tk->b_quicktime = VLC_TRUE;
 738                 }
 739             }
 740             else if( !strcmp( sub->mediumName(), "video" ) )
 741             {
 742                 es_format_Init( &tk->fmt, VIDEO_ES, VLC_FOURCC('u','n','d','f') );
 743                 if( !strcmp( sub->codecName(), "MPV" ) )
 744                 {
 745                     tk->fmt.i_codec = VLC_FOURCC( 'm', 'p', 'g', 'v' );
 746                 }
 747                 else if( !strcmp( sub->codecName(), "H263" ) ||
 748                          !strcmp( sub->codecName(), "H263-1998" ) ||
 749                          !strcmp( sub->codecName(), "H263-2000" ) )
 750                 {
 751                     tk->fmt.i_codec = VLC_FOURCC( 'H', '2', '6', '3' );
 752                 }
 753                 else if( !strcmp( sub->codecName(), "H261" ) )
 754                 {
 755                     tk->fmt.i_codec = VLC_FOURCC( 'H', '2', '6', '1' );
 756                 }
 757                 else if( !strcmp( sub->codecName(), "H264" ) )
 758                 {
 759                     unsigned int i_extra = 0;
 760                     uint8_t      *p_extra = NULL;
 761
 762                     tk->fmt.i_codec = VLC_FOURCC( 'h', '2', '6', '4' );
 763                     tk->fmt.b_packetized = VLC_FALSE;
 764
 765                     if((p_extra=parseH264ConfigStr( sub->fmtp_spropparametersets(),
 766                                                     i_extra ) ) )
 767                     {
 768                         tk->fmt.i_extra = i_extra;
 769                         tk->fmt.p_extra = malloc( i_extra );
 770                         memcpy( tk->fmt.p_extra, p_extra, i_extra );
 771
 772                         delete[] p_extra;
 773                     }
 774                 }
 775                 else if( !strcmp( sub->codecName(), "JPEG" ) )
 776                 {
 777                     tk->fmt.i_codec = VLC_FOURCC( 'M', 'J', 'P', 'G' );
 778                 }
 779                 else if( !strcmp( sub->codecName(), "MP4V-ES" ) )
 780                 {
 781                     unsigned int i_extra;
 782                     uint8_t      *p_extra;
 783
 784                     tk->fmt.i_codec = VLC_FOURCC( 'm', 'p', '4', 'v' );
 785
 786                     if( ( p_extra = parseGeneralConfigStr( sub->fmtp_config(),
 787                                                            i_extra ) ) )
 788                     {
 789                         tk->fmt.i_extra = i_extra;
 790                         tk->fmt.p_extra = malloc( i_extra );
 791                         memcpy( tk->fmt.p_extra, p_extra, i_extra );
 792                         delete[] p_extra;
 793                     }
 794                 }
 795                 else if( !strcmp( sub->codecName(), "X-QT" ) ||
 796                          !strcmp( sub->codecName(), "X-QUICKTIME" ) ||
 797                          !strcmp( sub->codecName(), "X-QDM" ) ||
 798                          !strcmp( sub->codecName(), "X-SV3V-ES" )  ||
 799                          !strcmp( sub->codecName(), "X-SORENSONVIDEO" ) )
 800                 {
 801                     tk->b_quicktime = VLC_TRUE;
 802                 }
 803                 else if( !strcmp( sub->codecName(), "MP2T" ) )
 804                 {
 805                     tk->b_muxed = VLC_TRUE;
 806                     tk->p_out_muxed = stream_DemuxNew( p_demux, "ts", p_demux->out );
 807                 }
 808                 else if( !strcmp( sub->codecName(), "MP2P" ) ||
 809                          !strcmp( sub->codecName(), "MP1S" ) )
 810                 {
 811                     tk->b_muxed = VLC_TRUE;
 812                     tk->p_out_muxed = stream_DemuxNew( p_demux, "ps",
 813                                                        p_demux->out );
 814                 }
 815                 else if( !strcmp( sub->codecName(), "X-ASF-PF" ) )
 816                 {
 817                     tk->b_asf = VLC_TRUE;
 818                     if( p_sys->p_out_asf == NULL )
 819                         p_sys->p_out_asf = stream_DemuxNew( p_demux, "asf",
 820                                                             p_demux->out );;
 821                 }
 822             }
 823
 824             if( !tk->b_quicktime && !tk->b_muxed && !tk->b_asf )
 825             {
 826                 tk->p_es = es_out_Add( p_demux->out, &tk->fmt );
 827             }
 828
 829             if( sub->rtcpInstance() != NULL )
 830             {
 831                 sub->rtcpInstance()->setByeHandler( StreamClose, tk );
 832             }
 833
 834             if( tk->p_es || tk->b_quicktime || tk->b_muxed || tk->b_asf )
 835             {
 836                 /* Append */
 837                 p_sys->track = (live_track_t**)realloc( p_sys->track, sizeof( live_track_t ) * ( p_sys->i_track + 1 ) );
 838                 p_sys->track[p_sys->i_track++] = tk;
 839             }
 840             else
 841             {
 842                 /* BUG ??? */
 843                 msg_Err( p_demux, "unusable RTSP track. this should not happen" );
 844                 free( tk );
 845             }
 846         }
 847     }
 848     delete iter;
 849     if( p_sys->i_track <= 0 ) i_return = VLC_EGENERIC;
 850
 851 #if (LIVEMEDIA_LIBRARY_VERSION_INT >= 1171929600)
 852     /* Retrieve the starttime if possible */
 853     p_sys->i_npt_start = (int64_t)( p_sys->ms->playStartTime() * (double)1000000.0 );
 854 #else
 855     p_sys->i_npt_start = (int64_t) = -1;
 856 #endif
 857     if( p_sys->i_npt_start < 0 )
 858         p_sys->i_npt_start = -1;
 859
 860 #if (LIVEMEDIA_LIBRARY_VERSION_INT >= 1171929600)
 861     /* Retrieve the duration if possible */
 862     p_sys->i_npt_length = (int64_t)( p_sys->ms->playEndTime() * (double)1000000.0 );
 863 #else
 864     p_sys->i_npt_length = (int64_t) -1;
 865 #endif
 866     if( p_sys->i_npt_length < 0 )
 867         p_sys->i_npt_length = -1;
 868
 869     msg_Dbg( p_demux, "setup start: %lld stop:%lld", p_sys->i_npt_start, p_sys->i_npt_length );
 870     return i_return;
 871 }
 872
 873 /*****************************************************************************
 874  * Play: starts the actual playback of the stream
 875  *****************************************************************************/
 876 static int Play( demux_t *p_demux )
 877 {
 878     demux_sys_t *p_sys = p_demux->p_sys;
 879     int i;
 880
 881     if( p_sys->rtsp )
 882     {
 883         /* The PLAY */
 884         if( !p_sys->rtsp->playMediaSession( *p_sys->ms, p_sys->i_npt_start, -1, 1 ) )
 885         {
 886             msg_Err( p_demux, "RTSP PLAY failed %s", p_sys->env->getResultMsg() );
 887             return VLC_EGENERIC;
 888         }
 889
 890         /* Retrieve the timeout value and set up a timeout prevention thread */
 891         p_sys->i_timeout = p_sys->rtsp->sessionTimeoutParameter();
 892         if( p_sys->i_timeout > 0 && !p_sys->p_timeout )
 893         {
 894             msg_Dbg( p_demux, "We have a timeout of %d seconds",  p_sys->i_timeout );
 895             p_sys->p_timeout = (timeout_thread_t *)vlc_object_create( p_demux, sizeof(timeout_thread_t) );
 896             p_sys->p_timeout->p_sys = p_demux->p_sys; /* lol, object recursion :D */
 897             if( vlc_thread_create( p_sys->p_timeout, "liveMedia-timeout", TimeoutPrevention,
 898                                    VLC_THREAD_PRIORITY_LOW, VLC_TRUE ) )
 899             {
 900                 msg_Err( p_demux, "cannot spawn liveMedia timeout thread" );
 901                 vlc_object_destroy( p_sys->p_timeout );
 902             }
 903             msg_Dbg( p_demux, "spawned timeout thread" );
 904             vlc_object_attach( p_sys->p_timeout, p_demux );
 905         }
 906     }
 907     p_sys->i_pcr = 0;
 908
 909 #if 0
 910     /* TODO */
 911     for( i = 0; i < p_sys->i_track; i++ )
 912     {
 913         //p_sys->track[i]->i_pts = 0;
 914         p_sys->track[i]->i_start_seq = (int)p_sys->track[i]->sub->rtpInfo.seqNum;
 915         msg_Dbg( p_demux, "set startseq: %u", p_sys->track[i]->i_start_seq );
 916     }
 917 #endif
 918
 919 #if (LIVEMEDIA_LIBRARY_VERSION_INT >= 1171929600)
 920     /* Retrieve the starttime if possible */
 921     p_sys->i_npt_start = (int64_t)( p_sys->ms->playStartTime() * (double)1000000.0 );
 922 #else
 923     p_sys->i_npt_start = (int64_t) -1;
 924 #endif
 925     if( p_sys->i_npt_start < 0 )
 926     {
 927         p_sys->i_npt_start = -1;
 928         p_sys->i_npt = 0;
 929     }
 930     else
 931         p_sys->i_npt = p_sys->i_npt_start;
 932
 933 #if (LIVEMEDIA_LIBRARY_VERSION_INT >= 1171929600)
 934     /* Retrieve the duration if possible */
 935     p_sys->i_npt_length = (int64_t)( p_sys->ms->playEndTime() * (double)1000000.0 );
 936 #else
 937     p_sys->i_npt_length = -1;
 938 #endif
 939     if( p_sys->i_npt_length < 0 )
 940         p_sys->i_npt_length = -1;
 941
 942     msg_Dbg( p_demux, "play start: %lld stop:%lld", p_sys->i_npt_start, p_sys->i_npt_length );
 943     return VLC_SUCCESS;
 944 }
 945
 946
 947 /*****************************************************************************
 948  * Demux:
 949  *****************************************************************************/
 950 static int Demux( demux_t *p_demux )
 951 {
 952     demux_sys_t    *p_sys = p_demux->p_sys;
 953     TaskToken      task;
 954
 955     vlc_bool_t      b_send_pcr = VLC_TRUE;
 956     int64_t         i_pcr = 0;
 957     int             i;
 958
 959     /* Check if we need to send the server a Keep-A-Live signal */
 960     if( p_sys->b_timeout_call && p_sys->rtsp && p_sys->ms )
 961     {
 962         char *psz_bye = NULL;
 963         p_sys->rtsp->getMediaSessionParameter( *p_sys->ms, NULL, psz_bye );
 964         p_sys->b_timeout_call = VLC_FALSE;
 965     }
 966
 967
 968     for( i = 0; i < p_sys->i_track; i++ )
 969     {
 970         live_track_t *tk = p_sys->track[i];
 971
 972         if( tk->b_asf || tk->b_muxed )
 973             b_send_pcr = VLC_FALSE;
 974 #if 0
 975         if( i_pcr == 0 )
 976         {
 977             i_pcr = tk->i_pts;
 978         }
 979         else if( tk->i_pts != 0 && i_pcr > tk->i_pts )
 980         {
 981             i_pcr = tk->i_pts ;
 982         }
 983 #endif
 984     }
 985     if( p_sys->i_pcr > 0 )
 986     {
 987         if( b_send_pcr )
 988             es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_sys->i_pcr );
 989     }
 990
 991     /* First warn we want to read data */
 992     p_sys->event = 0;
 993     for( i = 0; i < p_sys->i_track; i++ )
 994     {
 995         live_track_t *tk = p_sys->track[i];
 996
 997         if( tk->waiting == 0 )
 998         {
 999             tk->waiting = 1;
1000             tk->sub->readSource()->getNextFrame( tk->p_buffer, tk->i_buffer,
1001                                           StreamRead, tk, StreamClose, tk );
1002         }
1003     }
1004     /* Create a task that will be called if we wait more than 300ms */
1005     task = p_sys->scheduler->scheduleDelayedTask( 300000, TaskInterrupt, p_demux );
1006
1007     /* Do the read */
1008     p_sys->scheduler->doEventLoop( &p_sys->event );
1009
1010     /* remove the task */
1011     p_sys->scheduler->unscheduleDelayedTask( task );
1012
1013     /* Check for gap in pts value */
1014     for( i = 0; i < p_sys->i_track; i++ )
1015     {
1016         live_track_t *tk = p_sys->track[i];
1017
1018         if( !tk->b_muxed && !tk->b_rtcp_sync &&
1019             tk->sub->rtpSource() && tk->sub->rtpSource()->hasBeenSynchronizedUsingRTCP() )
1020         {
1021             msg_Dbg( p_demux, "tk->rtpSource->hasBeenSynchronizedUsingRTCP()" );
1022
1023             es_out_Control( p_demux->out, ES_OUT_RESET_PCR );
1024             tk->b_rtcp_sync = VLC_TRUE;
1025 #if 0
1026             /* reset PCR */
1027             tk->i_pts = 0;
1028             p_sys->i_pcr = 0;
1029             i_pcr = 0;
1030 #endif
1031         }
1032     }
1033
1034     if( p_sys->b_multicast && p_sys->b_no_data && p_sys->i_no_data_ti > 120 )
1035     {
1036         /* FIXME Make this configurable
1037         msg_Err( p_demux, "no multicast data received in 36s, aborting" );
1038         return 0;
1039         */
1040     }
1041     else if( !p_sys->b_multicast && p_sys->b_no_data && p_sys->i_no_data_ti > 34 )
1042     {
1043         vlc_bool_t b_rtsp_tcp = var_GetBool( p_demux, "rtsp-tcp" );
1044
1045         if( !b_rtsp_tcp && p_sys->rtsp && p_sys->ms )
1046         {
1047             msg_Warn( p_demux, "no data received in 10s. Switching to TCP" );
1048             if( RollOverTcp( p_demux ) )
1049             {
1050                 msg_Err( p_demux, "TCP rollover failed, aborting" );
1051                 return 0;
1052             }
1053         }
1054         else if( p_sys->i_no_data_ti > 34 )
1055         {
1056             msg_Err( p_demux, "no data received in 10s, aborting" );
1057             return 0;
1058         }
1059     }
1060     else if( !p_sys->b_multicast && p_sys->b_no_data && p_sys->i_no_data_ti > 34 )
1061     {
1062         /* EOF ? */
1063         msg_Warn( p_demux, "no data received in 10s, eof ?" );
1064         return 0;
1065     }
1066     return p_demux->b_error ? 0 : 1;
1067 }
1068
1069 /*****************************************************************************
1070  * Control:
1071  *****************************************************************************/
1072 static int Control( demux_t *p_demux, int i_query, va_list args )
1073 {
1074     demux_sys_t *p_sys = p_demux->p_sys;
1075     int64_t *pi64;
1076     double  *pf, f;
1077     vlc_bool_t *pb, b_bool;
1078
1079     switch( i_query )
1080     {
1081         case DEMUX_GET_TIME:
1082             pi64 = (int64_t*)va_arg( args, int64_t * );
1083             if( p_sys->i_npt > 0 )
1084             {
1085                 *pi64 = p_sys->i_npt;
1086                 return VLC_SUCCESS;
1087             }
1088             return VLC_EGENERIC;
1089
1090         case DEMUX_GET_LENGTH:
1091             pi64 = (int64_t*)va_arg( args, int64_t * );
1092             if( p_sys->i_npt_length > 0 )
1093             {
1094                 *pi64 = p_sys->i_npt_length;
1095                 return VLC_SUCCESS;
1096             }
1097             return VLC_EGENERIC;
1098
1099         case DEMUX_GET_POSITION:
1100             pf = (double*)va_arg( args, double* );
1101             if( p_sys->i_npt_length > 0 && p_sys->i_npt > 0 )
1102             {
1103                 *pf = (double)p_sys->i_npt / (double)p_sys->i_npt_length;
1104                 return VLC_SUCCESS;
1105             }
1106             return VLC_EGENERIC;
1107
1108         case DEMUX_SET_POSITION:
1109         {
1110             float time;
1111
1112             f = (double)va_arg( args, double );
1113             if( p_sys->rtsp && p_sys->i_npt_length > 0 )
1114             {
1115                 int i;
1116                 time = f * (double)p_sys->i_npt_length / 1000000.0;   /* in second */
1117                 if( !p_sys->rtsp->playMediaSession( *p_sys->ms, time, -1, 1 ) )
1118                 {
1119                     msg_Err( p_demux, "PLAY failed %s",
1120                         p_sys->env->getResultMsg() );
1121                     return VLC_EGENERIC;
1122                 }
1123                 es_out_Control( p_demux->out, ES_OUT_RESET_PCR );
1124                 p_sys->i_pcr = 0;
1125 #if 0
1126                 /* Retrieve RTP-Info values */
1127                 for( i = 0; i < p_sys->i_track; i++ )
1128                 {
1129                     //p_sys->track[i]->i_pts = 0;
1130                     p_sys->track[i]->i_start_seq = p_sys->track[i]->sub->rtpInfo.seqNum;
1131                     msg_Dbg( p_demux, "set pos startseq: %u", p_sys->track[i]->i_start_seq );
1132                 }
1133 #endif
1134 #if (LIVEMEDIA_LIBRARY_VERSION_INT >= 1171929600)
1135                 /* Retrieve the starttime if possible */
1136                 p_sys->i_npt_start = (int64_t)( p_sys->ms->playStartTime() * (double)1000000.0 );
1137 #else
1138                 p_sys->i_npt_start = (int64_t) -1;
1139 #endif
1140                 if( p_sys->i_npt_start < 0 )
1141                 {
1142                     p_sys->i_npt_start = -1;
1143                     p_sys->i_npt = 0;
1144                 }
1145                 else
1146                     p_sys->i_npt = p_sys->i_npt_start;
1147
1148 #if (LIVEMEDIA_LIBRARY_VERSION_INT >= 1171929600)
1149                 /* Retrieve the duration if possible */
1150                 p_sys->i_npt_length = (int64_t)( p_sys->ms->playEndTime() * (double)1000000.0 );
1151 #else
1152                 p_sys->i_npt_length = (int64_t) -1;
1153 #endif
1154                 if( p_sys->i_npt_length < 0 )
1155                     p_sys->i_npt_length = -1;
1156
1157                 msg_Dbg( p_demux, "seek start: %lld stop:%lld", p_sys->i_npt_start, p_sys->i_npt_length );
1158                 return VLC_SUCCESS;
1159             }
1160             return VLC_EGENERIC;
1161         }
1162         /* Special for access_demux */
1163         case DEMUX_CAN_PAUSE:
1164             pb = (vlc_bool_t*)va_arg( args, vlc_bool_t * );
1165             if( p_sys->rtsp && p_sys->i_npt_length )
1166                 /* Not always true, but will be handled in SET_PAUSE_STATE */
1167                 *pb = VLC_TRUE;
1168             else
1169                 *pb = VLC_FALSE;
1170             return VLC_SUCCESS;
1171
1172         case DEMUX_CAN_CONTROL_PACE:
1173             pb = (vlc_bool_t*)va_arg( args, vlc_bool_t * );
1174
1175 #if 1       /* Disable for now until we have a clock synchro algo
1176              * which works with something else than MPEG over UDP */
1177             *pb = VLC_FALSE;
1178 #else
1179             *pb = VLC_TRUE;
1180 #endif
1181             return VLC_SUCCESS;
1182
1183         case DEMUX_SET_PAUSE_STATE:
1184         {
1185             double d_npt = (double) p_sys->i_npt / I64C(1000000);
1186             int i;
1187
1188             b_bool = (vlc_bool_t)va_arg( args, vlc_bool_t );
1189             if( p_sys->rtsp == NULL )
1190                 return VLC_EGENERIC;
1191
1192             /* FIXME */
1193             if( ( b_bool && !p_sys->rtsp->pauseMediaSession( *p_sys->ms ) ) ||
1194                     ( !b_bool && !p_sys->rtsp->playMediaSession( *p_sys->ms,
1195                       d_npt > 0 ? d_npt : -1 ) ) )
1196             {
1197                     msg_Err( p_demux, "PLAY or PAUSE failed %s", p_sys->env->getResultMsg() );
1198                     return VLC_EGENERIC;
1199             }
1200             es_out_Control( p_demux->out, ES_OUT_RESET_PCR );
1201             p_sys->i_pcr = 0;
1202 #if 0
1203             for( i = 0; i < p_sys->i_track; i++ )
1204             {
1205                 //p_sys->track[i]->i_pts = 0;
1206                 p_sys->track[i]->i_start_seq = p_sys->track[i]->sub->rtpInfo.seqNum;
1207                 msg_Dbg( p_demux, "set pause startseq: %u", p_sys->track[i]->i_start_seq );
1208             }
1209 #endif
1210 #if (LIVEMEDIA_LIBRARY_VERSION_INT >= 1171929600)
1211             /* Retrieve the starttime if possible */
1212             p_sys->i_npt_start = (int64_t)( p_sys->ms->playStartTime() * (double)1000000.0 );
1213 #else
1214             p_sys->i_npt_start = (int64_t) -1;
1215 #endif
1216             if( p_sys->i_npt_start < 0 )
1217             {
1218                 p_sys->i_npt_start = -1;
1219                 p_sys->i_npt = 0;
1220             }
1221             else
1222                 p_sys->i_npt = p_sys->i_npt_start;
1223
1224 #if (LIVEMEDIA_LIBRARY_VERSION_INT >= 1171929600)
1225             /* Retrieve the duration if possible */
1226             p_sys->i_npt_length = (int64_t)( p_sys->ms->playEndTime() * (double)1000000.0 );
1227 #else
1228             p_sys->i_npt_length = (int64_t) -1;
1229 #endif
1230             if( p_sys->i_npt_length < 0 )
1231                 p_sys->i_npt_length = -1;
1232
1233             msg_Dbg( p_demux, "pause start: %lld stop:%lld", p_sys->i_npt_start, p_sys->i_npt_length );
1234             return VLC_SUCCESS;
1235         }
1236         case DEMUX_GET_TITLE_INFO:
1237         case DEMUX_SET_TITLE:
1238         case DEMUX_SET_SEEKPOINT:
1239             return VLC_EGENERIC;
1240
1241         case DEMUX_GET_PTS_DELAY:
1242             pi64 = (int64_t*)va_arg( args, int64_t * );
1243             *pi64 = (int64_t)var_GetInteger( p_demux, "rtsp-caching" ) * 1000;
1244             return VLC_SUCCESS;
1245
1246         default:
1247             return VLC_EGENERIC;
1248     }
1249 }
1250
1251 /*****************************************************************************
1252  * RollOverTcp: reopen the rtsp into TCP mode
1253  * XXX: ugly, a lot of code are duplicated from Open()
1254  * This should REALLY be fixed
1255  *****************************************************************************/
1256 static int RollOverTcp( demux_t *p_demux )
1257 {
1258     demux_sys_t *p_sys = p_demux->p_sys;
1259     int i, i_return;
1260
1261     var_SetBool( p_demux, "rtsp-tcp", VLC_TRUE );
1262
1263     /* We close the old RTSP session */
1264     for( i = 0; i < p_sys->i_track; i++ )
1265     {
1266         live_track_t *tk = p_sys->track[i];
1267
1268         if( tk->b_muxed ) stream_DemuxDelete( tk->p_out_muxed );
1269         free( tk->p_buffer );
1270         free( tk );
1271     }
1272     if( p_sys->i_track ) free( p_sys->track );
1273     if( p_sys->p_out_asf ) stream_DemuxDelete( p_sys->p_out_asf );
1274
1275     p_sys->rtsp->teardownMediaSession( *p_sys->ms );
1276     Medium::close( p_sys->ms );
1277     RTSPClient::close( p_sys->rtsp );
1278
1279     p_sys->ms = NULL;
1280     p_sys->rtsp = NULL;
1281     p_sys->track = NULL;
1282     p_sys->i_track = 0;
1283
1284     /* Reopen rtsp client */
1285     if( p_demux->s != NULL && ( i_return = Connect( p_demux ) ) != VLC_SUCCESS )
1286     {
1287         msg_Err( p_demux, "Failed to connect with rtsp://%s", p_sys->psz_path );
1288         goto error;
1289     }
1290
1291     if( p_sys->p_sdp == NULL )
1292     {
1293         msg_Err( p_demux, "Failed to retrieve the RTSP Session Description" );
1294         goto error;
1295     }
1296
1297     if( ( i_return = SessionsSetup( p_demux ) ) != VLC_SUCCESS )
1298     {
1299         msg_Err( p_demux, "Nothing to play for rtsp://%s", p_sys->psz_path );
1300         goto error;
1301     }
1302
1303     if( ( i_return = Play( p_demux ) ) != VLC_SUCCESS )
1304         goto error;
1305
1306     return VLC_SUCCESS;
1307
1308 error:
1309     return VLC_EGENERIC;
1310 }
1311
1312
1313 /*****************************************************************************
1314  *
1315  *****************************************************************************/
1316 static void StreamRead( void *p_private, unsigned int i_size,
1317                         unsigned int i_truncated_bytes, struct timeval pts,
1318                         unsigned int duration )
1319 {
1320     live_track_t   *tk = (live_track_t*)p_private;
1321     demux_t        *p_demux = tk->p_demux;
1322     demux_sys_t    *p_sys = p_demux->p_sys;
1323     block_t        *p_block;
1324
1325     msg_Dbg( p_demux, "pts: %d", pts.tv_sec );
1326
1327     int64_t i_pts = (uint64_t)pts.tv_sec * UI64C(1000000) +
1328         (uint64_t)pts.tv_usec;
1329
1330     /* XXX Beurk beurk beurk Avoid having negative value XXX */
1331     i_pts &= UI64C(0x00ffffffffffffff);
1332
1333     if( tk->b_quicktime && tk->p_es == NULL )
1334     {
1335         QuickTimeGenericRTPSource *qtRTPSource =
1336             (QuickTimeGenericRTPSource*)tk->sub->rtpSource();
1337         QuickTimeGenericRTPSource::QTState &qtState = qtRTPSource->qtState;
1338         uint8_t *sdAtom = (uint8_t*)&qtState.sdAtom[4];
1339
1340         if( tk->fmt.i_cat == VIDEO_ES ) {
1341             if( qtState.sdAtomSize < 16 + 32 )
1342             {
1343                 /* invalid */
1344                 p_sys->event = 0xff;
1345                 tk->waiting = 0;
1346                 return;
1347             }
1348             tk->fmt.i_codec = VLC_FOURCC(sdAtom[0],sdAtom[1],sdAtom[2],sdAtom[3]);
1349             tk->fmt.video.i_width  = (sdAtom[28] << 8) | sdAtom[29];
1350             tk->fmt.video.i_height = (sdAtom[30] << 8) | sdAtom[31];
1351
1352             if( tk->fmt.i_codec == VLC_FOURCC('a', 'v', 'c', '1') )
1353             {
1354                 uint8_t *pos = (uint8_t*)qtRTPSource->qtState.sdAtom + 86;
1355                 uint8_t *endpos = (uint8_t*)qtRTPSource->qtState.sdAtom
1356                                   + qtRTPSource->qtState.sdAtomSize;
1357                 while (pos+8 < endpos) {
1358                     unsigned atomLength = pos[0]<<24 | pos[1]<<16 | pos[2]<<8 | pos[3];
1359                     if( atomLength == 0 || atomLength > endpos-pos) break;
1360                     if( memcmp(pos+4, "avcC", 4) == 0 &&
1361                         atomLength > 8 &&
1362                         atomLength <= INT_MAX )
1363                     {
1364                         tk->fmt.i_extra = atomLength-8;
1365                         tk->fmt.p_extra = malloc( tk->fmt.i_extra );
1366                         memcpy(tk->fmt.p_extra, pos+8, atomLength-8);
1367                         break;
1368                     }
1369                     pos += atomLength;
1370                 }
1371             }
1372             else
1373             {
1374                 tk->fmt.i_extra        = qtState.sdAtomSize - 16;
1375                 tk->fmt.p_extra        = malloc( tk->fmt.i_extra );
1376                 memcpy( tk->fmt.p_extra, &sdAtom[12], tk->fmt.i_extra );
1377             }
1378         }
1379         else {
1380             if( qtState.sdAtomSize < 4 )
1381             {
1382                 /* invalid */
1383                 p_sys->event = 0xff;
1384                 tk->waiting = 0;
1385                 return;
1386             }
1387             tk->fmt.i_codec = VLC_FOURCC(sdAtom[0],sdAtom[1],sdAtom[2],sdAtom[3]);
1388         }
1389         tk->p_es = es_out_Add( p_demux->out, &tk->fmt );
1390     }
1391
1392 #if 0
1393     fprintf( stderr, "StreamRead size=%d pts=%lld\n",
1394              i_size,
1395              pts.tv_sec * 1000000LL + pts.tv_usec );
1396 #endif
1397
1398     /* grow buffer if it looks like buffer is too small, but don't eat
1399      * up all the memory on strange streams */
1400     if( i_truncated_bytes > 0 && tk->i_buffer < 2000000 )
1401     {
1402         void *p_tmp;
1403         msg_Dbg( p_demux, "lost %d bytes", i_truncated_bytes );
1404         msg_Dbg( p_demux, "increasing buffer size to %d", tk->i_buffer * 2 );
1405         tk->i_buffer *= 2;
1406         p_tmp = realloc( tk->p_buffer, tk->i_buffer );
1407         if( p_tmp == NULL )
1408         {
1409             msg_Warn( p_demux, "realloc failed" );
1410         }
1411         else
1412         {
1413             tk->p_buffer = (uint8_t*)p_tmp;
1414         }
1415     }
1416     if( i_size > tk->i_buffer )
1417     {
1418         msg_Warn( p_demux, "buffer overflow" );
1419     }
1420     /* FIXME could i_size be > buffer size ? */
1421     if( tk->fmt.i_codec == VLC_FOURCC('s','a','m','r') ||
1422         tk->fmt.i_codec == VLC_FOURCC('s','a','w','b') )
1423     {
1424         AMRAudioSource *amrSource = (AMRAudioSource*)tk->sub->readSource();
1425
1426         p_block = block_New( p_demux, i_size + 1 );
1427         p_block->p_buffer[0] = amrSource->lastFrameHeader();
1428         memcpy( p_block->p_buffer + 1, tk->p_buffer, i_size );
1429     }
1430     else if( tk->fmt.i_codec == VLC_FOURCC('H','2','6','1') )
1431     {
1432 #if LIVEMEDIA_LIBRARY_VERSION_INT >= 1081468800
1433         H261VideoRTPSource *h261Source = (H261VideoRTPSource*)tk->sub->rtpSource();
1434         uint32_t header = h261Source->lastSpecialHeader();
1435 #else
1436         uint32_t header = 0;
1437         msg_Warn( p_demux, "need livemedia library >= \"2004.04.09\"" );
1438 #endif
1439         p_block = block_New( p_demux, i_size + 4 );
1440         memcpy( p_block->p_buffer, &header, 4 );
1441         memcpy( p_block->p_buffer + 4, tk->p_buffer, i_size );
1442
1443         if( tk->sub->rtpSource()->curPacketMarkerBit() )
1444             p_block->i_flags |= BLOCK_FLAG_END_OF_FRAME;
1445     }
1446     else if( tk->fmt.i_codec == VLC_FOURCC('h','2','6','4') )
1447     {
1448         if( (tk->p_buffer[0] & 0x1f) >= 24 )
1449             msg_Warn( p_demux, "unsupported NAL type for H264" );
1450
1451         /* Normal NAL type */
1452         p_block = block_New( p_demux, i_size + 4 );
1453         p_block->p_buffer[0] = 0x00;
1454         p_block->p_buffer[1] = 0x00;
1455         p_block->p_buffer[2] = 0x00;
1456         p_block->p_buffer[3] = 0x01;
1457         memcpy( &p_block->p_buffer[4], tk->p_buffer, i_size );
1458     }
1459     else if( tk->b_asf )
1460     {
1461         int i_copy = __MIN( p_sys->asfh.i_min_data_packet_size, (int)i_size );
1462         p_block = block_New( p_demux, p_sys->asfh.i_min_data_packet_size );
1463
1464         memcpy( p_block->p_buffer, tk->p_buffer, i_copy );
1465     }
1466     else
1467     {
1468         p_block = block_New( p_demux, i_size );
1469         memcpy( p_block->p_buffer, tk->p_buffer, i_size );
1470     }
1471
1472     /* Update NPT */
1473     //msg_Dbg( p_demux, "current %d, start_seq %u", (int)tk->sub->rtpSource()->curPacketRTPSeqNum(), tk->i_start_seq );
1474     if( (tk->fmt.i_cat == VIDEO_ES) && (p_sys->i_pcr < i_pts) &&
1475         (i_pts > 0) && (p_sys->i_pcr > 0) )
1476     {
1477         p_sys->i_npt += __MAX( 0, i_pts - p_sys->i_pcr );
1478         p_sys->i_pcr = i_pts;
1479         msg_Dbg( p_demux, "npt update" );
1480     }
1481     else if( (tk->fmt.i_cat == VIDEO_ES) && (p_sys->i_pcr < i_pts) )
1482     {
1483         p_sys->i_pcr = i_pts;
1484     }
1485     msg_Dbg( p_demux, "npt %lld", p_sys->i_npt );
1486
1487     if( (i_pts != tk->i_pts) && (!tk->b_muxed) )
1488     {
1489         p_block->i_dts = ( tk->fmt.i_cat == VIDEO_ES ) ? 0 : i_pts;
1490         p_block->i_pts = i_pts;
1491     }
1492
1493     if( tk->b_muxed )
1494     {
1495         stream_DemuxSend( tk->p_out_muxed, p_block );
1496     }
1497     else if( tk->b_asf )
1498     {
1499         stream_DemuxSend( p_sys->p_out_asf, p_block );
1500     }
1501     else
1502     {
1503         es_out_Send( p_demux->out, tk->p_es, p_block );
1504     }
1505
1506     /* warn that's ok */
1507     p_sys->event = 0xff;
1508
1509     /* we have read data */
1510     tk->waiting = 0;
1511     p_demux->p_sys->b_no_data = VLC_FALSE;
1512     p_demux->p_sys->i_no_data_ti = 0;
1513
1514     if( i_pts > 0 && !tk->b_muxed )
1515     {
1516         tk->i_pts = i_pts;
1517     }
1518 }
1519
1520 /*****************************************************************************
1521  *
1522  *****************************************************************************/
1523 static void StreamClose( void *p_private )
1524 {
1525     live_track_t   *tk = (live_track_t*)p_private;
1526     demux_t        *p_demux = tk->p_demux;
1527     demux_sys_t    *p_sys = p_demux->p_sys;
1528
1529     msg_Dbg( p_demux, "StreamClose" );
1530
1531     p_sys->event = 0xff;
1532     p_demux->b_error = VLC_TRUE;
1533 }
1534
1535
1536 /*****************************************************************************
1537  *
1538  *****************************************************************************/
1539 static void TaskInterrupt( void *p_private )
1540 {
1541     demux_t *p_demux = (demux_t*)p_private;
1542
1543     p_demux->p_sys->i_no_data_ti++;
1544
1545     /* Avoid lock */
1546     p_demux->p_sys->event = 0xff;
1547 }
1548
1549 /*****************************************************************************
1550  *
1551  *****************************************************************************/
1552 static void TimeoutPrevention( timeout_thread_t *p_timeout )
1553 {
1554     p_timeout->b_die = VLC_FALSE;
1555     p_timeout->i_remain = (int64_t)p_timeout->p_sys->i_timeout -2;
1556     p_timeout->i_remain *= 1000000;
1557
1558     vlc_thread_ready( p_timeout );
1559
1560     /* Avoid lock */
1561     while( !p_timeout->b_die )
1562     {
1563         if( p_timeout->i_remain <= 0 )
1564         {
1565             p_timeout->i_remain = (int64_t)p_timeout->p_sys->i_timeout -2;
1566             p_timeout->i_remain *= 1000000;
1567             p_timeout->p_sys->b_timeout_call = VLC_TRUE;
1568             msg_Dbg( p_timeout, "reset the timeout timer" );
1569         }
1570         p_timeout->i_remain -= 200000;
1571         msleep( 200000 ); /* 200 ms */
1572     }
1573 }
1574
1575 /*****************************************************************************
1576  *
1577  *****************************************************************************/
1578 static int b64_decode( char *dest, char *src );
1579
1580 static int ParseASF( demux_t *p_demux )
1581 {
1582     demux_sys_t    *p_sys = p_demux->p_sys;
1583
1584     const char *psz_marker = "a=pgmpu:data:application/vnd.ms.wms-hdr.asfv1;base64,";
1585     char *psz_asf = strcasestr( p_sys->p_sdp, psz_marker );
1586     char *psz_end;
1587     block_t *p_header;
1588
1589     /* Parse the asf header */
1590     if( psz_asf == NULL )
1591         return VLC_EGENERIC;
1592
1593     psz_asf += strlen( psz_marker );
1594     psz_asf = strdup( psz_asf );    /* Duplicate it */
1595     psz_end = strchr( psz_asf, '\n' );
1596
1597     while( psz_end > psz_asf && ( *psz_end == '\n' || *psz_end == '\r' ) )
1598         *psz_end-- = '\0';
1599
1600     if( psz_asf >= psz_end )
1601     {
1602         free( psz_asf );
1603         return VLC_EGENERIC;
1604     }
1605
1606     /* Always smaller */
1607     p_header = block_New( p_demux, psz_end - psz_asf );
1608     p_header->i_buffer = b64_decode( (char*)p_header->p_buffer, psz_asf );
1609     //msg_Dbg( p_demux, "Size=%d Hdrb64=%s", p_header->i_buffer, psz_asf );
1610     if( p_header->i_buffer <= 0 )
1611     {
1612         free( psz_asf );
1613         return VLC_EGENERIC;
1614     }
1615
1616     /* Parse it to get packet size */
1617     E_(asf_HeaderParse)( &p_sys->asfh, p_header->p_buffer, p_header->i_buffer );
1618
1619     /* Send it to demuxer */
1620     stream_DemuxSend( p_sys->p_out_asf, p_header );
1621
1622     free( psz_asf );
1623     return VLC_SUCCESS;
1624 }
1625
1626
1627 static unsigned char* parseH264ConfigStr( char const* configStr,
1628                                           unsigned int& configSize )
1629 {
1630     char *dup, *psz;
1631     int i, i_records = 1;
1632
1633     if( configSize )
1634     configSize = 0;
1635
1636     if( configStr == NULL || *configStr == '\0' )
1637         return NULL;
1638
1639     psz = dup = strdup( configStr );
1640
1641     /* Count the number of comma's */
1642     for( psz = dup; *psz != '\0'; ++psz )
1643     {
1644         if( *psz == ',')
1645         {
1646             ++i_records;
1647             *psz = '\0';
1648         }
1649     }
1650
1651     unsigned char *cfg = new unsigned char[5 * strlen(dup)];
1652     psz = dup;
1653     for( i = 0; i < i_records; i++ )
1654     {
1655         cfg[configSize++] = 0x00;
1656         cfg[configSize++] = 0x00;
1657         cfg[configSize++] = 0x00;
1658         cfg[configSize++] = 0x01;
1659
1660         configSize += b64_decode( (char*)&cfg[configSize], psz );
1661         psz += strlen(psz)+1;
1662     }
1663
1664     if( dup ) free( dup );
1665     return cfg;
1666 }
1667
1668 /*char b64[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";*/
1669 static int b64_decode( char *dest, char *src )
1670 {
1671     const char *dest_start = dest;
1672     int  i_level;
1673     int  last = 0;
1674     int  b64[256] = {
1675         -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,  /* 00-0F */
1676         -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,  /* 10-1F */
1677         -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,62,-1,-1,-1,63,  /* 20-2F */
1678         52,53,54,55,56,57,58,59,60,61,-1,-1,-1,-1,-1,-1,  /* 30-3F */
1679         -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,10,11,12,13,14,  /* 40-4F */
1680         15,16,17,18,19,20,21,22,23,24,25,-1,-1,-1,-1,-1,  /* 50-5F */
1681         -1,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,  /* 60-6F */
1682         41,42,43,44,45,46,47,48,49,50,51,-1,-1,-1,-1,-1,  /* 70-7F */
1683         -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,  /* 80-8F */
1684         -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,  /* 90-9F */
1685         -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,  /* A0-AF */
1686         -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,  /* B0-BF */
1687         -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,  /* C0-CF */
1688         -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,  /* D0-DF */
1689         -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,  /* E0-EF */
1690         -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1   /* F0-FF */
1691         };
1692
1693     for( i_level = 0; *src != '\0'; src++ )
1694     {
1695         int  c;
1696
1697         c = b64[(unsigned int)*src];
1698         if( c == -1 )
1699         {
1700             continue;
1701         }
1702
1703         switch( i_level )
1704         {
1705             case 0:
1706                 i_level++;
1707                 break;
1708             case 1:
1709                 *dest++ = ( last << 2 ) | ( ( c >> 4)&0x03 );
1710                 i_level++;
1711                 break;
1712             case 2:
1713                 *dest++ = ( ( last << 4 )&0xf0 ) | ( ( c >> 2 )&0x0f );
1714                 i_level++;
1715                 break;
1716             case 3:
1717                 *dest++ = ( ( last &0x03 ) << 6 ) | c;
1718                 i_level = 0;
1719         }
1720         last = c;
1721     }
1722
1723     *dest = '\0';
1724
1725     return dest - dest_start;
1726 }