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         vlc_object_kill( p_sys->p_timeout );
 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         vlc_object_kill( p_sys->p_timeout );
 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                     /* if we get an unsupported transport error, toggle TCP use and try again */
 606                     if( !strstr(p_sys->env->getResultMsg(), "461 Unsupported Transport")
 607                      || !( p_sys->rtsp->setupMediaSubsession( *sub, False,
 608                                                    b_rtsp_tcp ? False : True ) ) )
 609                     {
 610                         msg_Err( p_demux, "SETUP of'%s/%s' failed %s", sub->mediumName(),
 611                                  sub->codecName(), p_sys->env->getResultMsg() );
 612                         continue;
 613                     }
 614                 }
 615             }
 616
 617             /* Check if we will receive data from this subsession for this track */
 618             if( sub->readSource() == NULL ) continue;
 619             if( !p_sys->b_multicast )
 620             {
 621                 /* Check, because we need diff. rollover behaviour for multicast */
 622                 p_sys->b_multicast = IsMulticastAddress( sub->connectionEndpointAddress() );
 623             }
 624
 625             tk = (live_track_t*)malloc( sizeof( live_track_t ) );
 626             tk->p_demux     = p_demux;
 627             tk->sub         = sub;
 628             tk->p_es        = NULL;
 629             tk->b_quicktime = VLC_FALSE;
 630             tk->b_asf       = VLC_FALSE;
 631             tk->b_muxed     = VLC_FALSE;
 632             tk->p_out_muxed = NULL;
 633             tk->waiting     = 0;
 634             tk->b_rtcp_sync = VLC_FALSE;
 635             tk->i_pts       = 0;
 636             tk->i_buffer    = 65536;
 637             tk->p_buffer    = (uint8_t *)malloc( 65536 );
 638
 639             /* Value taken from mplayer */
 640             if( !strcmp( sub->mediumName(), "audio" ) )
 641             {
 642                 es_format_Init( &tk->fmt, AUDIO_ES, VLC_FOURCC('u','n','d','f') );
 643                 tk->fmt.audio.i_channels = sub->numChannels();
 644                 tk->fmt.audio.i_rate = sub->rtpTimestampFrequency();
 645
 646                 if( !strcmp( sub->codecName(), "MPA" ) ||
 647                     !strcmp( sub->codecName(), "MPA-ROBUST" ) ||
 648                     !strcmp( sub->codecName(), "X-MP3-DRAFT-00" ) )
 649                 {
 650                     tk->fmt.i_codec = VLC_FOURCC( 'm', 'p', 'g', 'a' );
 651                     tk->fmt.audio.i_rate = 0;
 652                 }
 653                 else if( !strcmp( sub->codecName(), "AC3" ) )
 654                 {
 655                     tk->fmt.i_codec = VLC_FOURCC( 'a', '5', '2', ' ' );
 656                     tk->fmt.audio.i_rate = 0;
 657                 }
 658                 else if( !strcmp( sub->codecName(), "L16" ) )
 659                 {
 660                     tk->fmt.i_codec = VLC_FOURCC( 't', 'w', 'o', 's' );
 661                     tk->fmt.audio.i_bitspersample = 16;
 662                 }
 663                 else if( !strcmp( sub->codecName(), "L8" ) )
 664                 {
 665                     tk->fmt.i_codec = VLC_FOURCC( 'a', 'r', 'a', 'w' );
 666                     tk->fmt.audio.i_bitspersample = 8;
 667                 }
 668                 else if( !strcmp( sub->codecName(), "PCMU" ) )
 669                 {
 670                     tk->fmt.i_codec = VLC_FOURCC( 'u', 'l', 'a', 'w' );
 671                 }
 672                 else if( !strcmp( sub->codecName(), "PCMA" ) )
 673                 {
 674                     tk->fmt.i_codec = VLC_FOURCC( 'a', 'l', 'a', 'w' );
 675                 }
 676                 else if( !strncmp( sub->codecName(), "G726", 4 ) )
 677                 {
 678                     tk->fmt.i_codec = VLC_FOURCC( 'g', '7', '2', '6' );
 679                     tk->fmt.audio.i_rate = 8000;
 680                     tk->fmt.audio.i_channels = 1;
 681                     if( !strcmp( sub->codecName()+5, "40" ) )
 682                         tk->fmt.i_bitrate = 40000;
 683                     else if( !strcmp( sub->codecName()+5, "32" ) )
 684                         tk->fmt.i_bitrate = 32000;
 685                     else if( !strcmp( sub->codecName()+5, "24" ) )
 686                         tk->fmt.i_bitrate = 24000;
 687                     else if( !strcmp( sub->codecName()+5, "16" ) )
 688                         tk->fmt.i_bitrate = 16000;
 689                 }
 690                 else if( !strcmp( sub->codecName(), "AMR" ) )
 691                 {
 692                     tk->fmt.i_codec = VLC_FOURCC( 's', 'a', 'm', 'r' );
 693                 }
 694                 else if( !strcmp( sub->codecName(), "AMR-WB" ) )
 695                 {
 696                     tk->fmt.i_codec = VLC_FOURCC( 's', 'a', 'w', 'b' );
 697                 }
 698                 else if( !strcmp( sub->codecName(), "MP4A-LATM" ) )
 699                 {
 700                     unsigned int i_extra;
 701                     uint8_t      *p_extra;
 702
 703                     tk->fmt.i_codec = VLC_FOURCC( 'm', 'p', '4', 'a' );
 704
 705                     if( ( p_extra = parseStreamMuxConfigStr( sub->fmtp_config(),
 706                                                              i_extra ) ) )
 707                     {
 708                         tk->fmt.i_extra = i_extra;
 709                         tk->fmt.p_extra = malloc( i_extra );
 710                         memcpy( tk->fmt.p_extra, p_extra, i_extra );
 711                         delete[] p_extra;
 712                     }
 713                     /* Because the "faad" decoder does not handle the LATM data length field
 714                        at the start of each returned LATM frame, tell the RTP source to omit it. */
 715                     ((MPEG4LATMAudioRTPSource*)sub->rtpSource())->omitLATMDataLengthField();
 716                 }
 717                 else if( !strcmp( sub->codecName(), "MPEG4-GENERIC" ) )
 718                 {
 719                     unsigned int i_extra;
 720                     uint8_t      *p_extra;
 721
 722                     tk->fmt.i_codec = VLC_FOURCC( 'm', 'p', '4', 'a' );
 723
 724                     if( ( p_extra = parseGeneralConfigStr( sub->fmtp_config(),
 725                                                            i_extra ) ) )
 726                     {
 727                         tk->fmt.i_extra = i_extra;
 728                         tk->fmt.p_extra = malloc( i_extra );
 729                         memcpy( tk->fmt.p_extra, p_extra, i_extra );
 730                         delete[] p_extra;
 731                     }
 732                 }
 733                 else if( !strcmp( sub->codecName(), "X-ASF-PF" ) )
 734                 {
 735                     tk->b_asf = VLC_TRUE;
 736                     if( p_sys->p_out_asf == NULL )
 737                         p_sys->p_out_asf = stream_DemuxNew( p_demux, "asf",
 738                                                             p_demux->out );
 739                 }
 740                 else if( !strcmp( sub->codecName(), "X-QT" ) ||
 741                          !strcmp( sub->codecName(), "X-QUICKTIME" ) )
 742                 {
 743                     tk->b_quicktime = VLC_TRUE;
 744                 }
 745             }
 746             else if( !strcmp( sub->mediumName(), "video" ) )
 747             {
 748                 es_format_Init( &tk->fmt, VIDEO_ES, VLC_FOURCC('u','n','d','f') );
 749                 if( !strcmp( sub->codecName(), "MPV" ) )
 750                 {
 751                     tk->fmt.i_codec = VLC_FOURCC( 'm', 'p', 'g', 'v' );
 752                 }
 753                 else if( !strcmp( sub->codecName(), "H263" ) ||
 754                          !strcmp( sub->codecName(), "H263-1998" ) ||
 755                          !strcmp( sub->codecName(), "H263-2000" ) )
 756                 {
 757                     tk->fmt.i_codec = VLC_FOURCC( 'H', '2', '6', '3' );
 758                 }
 759                 else if( !strcmp( sub->codecName(), "H261" ) )
 760                 {
 761                     tk->fmt.i_codec = VLC_FOURCC( 'H', '2', '6', '1' );
 762                 }
 763                 else if( !strcmp( sub->codecName(), "H264" ) )
 764                 {
 765                     unsigned int i_extra = 0;
 766                     uint8_t      *p_extra = NULL;
 767
 768                     tk->fmt.i_codec = VLC_FOURCC( 'h', '2', '6', '4' );
 769                     tk->fmt.b_packetized = VLC_FALSE;
 770
 771                     if((p_extra=parseH264ConfigStr( sub->fmtp_spropparametersets(),
 772                                                     i_extra ) ) )
 773                     {
 774                         tk->fmt.i_extra = i_extra;
 775                         tk->fmt.p_extra = malloc( i_extra );
 776                         memcpy( tk->fmt.p_extra, p_extra, i_extra );
 777
 778                         delete[] p_extra;
 779                     }
 780                 }
 781                 else if( !strcmp( sub->codecName(), "JPEG" ) )
 782                 {
 783                     tk->fmt.i_codec = VLC_FOURCC( 'M', 'J', 'P', 'G' );
 784                 }
 785                 else if( !strcmp( sub->codecName(), "MP4V-ES" ) )
 786                 {
 787                     unsigned int i_extra;
 788                     uint8_t      *p_extra;
 789
 790                     tk->fmt.i_codec = VLC_FOURCC( 'm', 'p', '4', 'v' );
 791
 792                     if( ( p_extra = parseGeneralConfigStr( sub->fmtp_config(),
 793                                                            i_extra ) ) )
 794                     {
 795                         tk->fmt.i_extra = i_extra;
 796                         tk->fmt.p_extra = malloc( i_extra );
 797                         memcpy( tk->fmt.p_extra, p_extra, i_extra );
 798                         delete[] p_extra;
 799                     }
 800                 }
 801                 else if( !strcmp( sub->codecName(), "X-QT" ) ||
 802                          !strcmp( sub->codecName(), "X-QUICKTIME" ) ||
 803                          !strcmp( sub->codecName(), "X-QDM" ) ||
 804                          !strcmp( sub->codecName(), "X-SV3V-ES" )  ||
 805                          !strcmp( sub->codecName(), "X-SORENSONVIDEO" ) )
 806                 {
 807                     tk->b_quicktime = VLC_TRUE;
 808                 }
 809                 else if( !strcmp( sub->codecName(), "MP2T" ) )
 810                 {
 811                     tk->b_muxed = VLC_TRUE;
 812                     tk->p_out_muxed = stream_DemuxNew( p_demux, "ts", p_demux->out );
 813                 }
 814                 else if( !strcmp( sub->codecName(), "MP2P" ) ||
 815                          !strcmp( sub->codecName(), "MP1S" ) )
 816                 {
 817                     tk->b_muxed = VLC_TRUE;
 818                     tk->p_out_muxed = stream_DemuxNew( p_demux, "ps",
 819                                                        p_demux->out );
 820                 }
 821                 else if( !strcmp( sub->codecName(), "X-ASF-PF" ) )
 822                 {
 823                     tk->b_asf = VLC_TRUE;
 824                     if( p_sys->p_out_asf == NULL )
 825                         p_sys->p_out_asf = stream_DemuxNew( p_demux, "asf",
 826                                                             p_demux->out );;
 827                 }
 828             }
 829
 830             if( !tk->b_quicktime && !tk->b_muxed && !tk->b_asf )
 831             {
 832                 tk->p_es = es_out_Add( p_demux->out, &tk->fmt );
 833             }
 834
 835             if( sub->rtcpInstance() != NULL )
 836             {
 837                 sub->rtcpInstance()->setByeHandler( StreamClose, tk );
 838             }
 839
 840             if( tk->p_es || tk->b_quicktime || tk->b_muxed || tk->b_asf )
 841             {
 842                 /* Append */
 843                 p_sys->track = (live_track_t**)realloc( p_sys->track, sizeof( live_track_t ) * ( p_sys->i_track + 1 ) );
 844                 p_sys->track[p_sys->i_track++] = tk;
 845             }
 846             else
 847             {
 848                 /* BUG ??? */
 849                 msg_Err( p_demux, "unusable RTSP track. this should not happen" );
 850                 free( tk );
 851             }
 852         }
 853     }
 854     delete iter;
 855     if( p_sys->i_track <= 0 ) i_return = VLC_EGENERIC;
 856
 857 #if (LIVEMEDIA_LIBRARY_VERSION_INT >= 9999999999)
 858     /* Retrieve the starttime if possible */
 859     p_sys->i_npt_start = (int64_t)( p_sys->ms->playStartTime() * (double)1000000.0 );
 860 #else
 861     p_sys->i_npt_start = (int64_t) -1;
 862 #endif
 863     if( p_sys->i_npt_start < 0 )
 864         p_sys->i_npt_start = -1;
 865
 866 #if (LIVEMEDIA_LIBRARY_VERSION_INT >= 9999999999)
 867     /* Retrieve the duration if possible */
 868     p_sys->i_npt_length = (int64_t)( p_sys->ms->playEndTime() * (double)1000000.0 );
 869 #else
 870     p_sys->i_npt_length = (int64_t) -1;
 871 #endif
 872     if( p_sys->i_npt_length < 0 )
 873         p_sys->i_npt_length = -1;
 874
 875     msg_Dbg( p_demux, "setup start: %lld stop:%lld", p_sys->i_npt_start, p_sys->i_npt_length );
 876     return i_return;
 877 }
 878
 879 /*****************************************************************************
 880  * Play: starts the actual playback of the stream
 881  *****************************************************************************/
 882 static int Play( demux_t *p_demux )
 883 {
 884     demux_sys_t *p_sys = p_demux->p_sys;
 885     int i;
 886
 887     if( p_sys->rtsp )
 888     {
 889         /* The PLAY */
 890         if( !p_sys->rtsp->playMediaSession( *p_sys->ms, p_sys->i_npt_start, -1, 1 ) )
 891         {
 892             msg_Err( p_demux, "RTSP PLAY failed %s", p_sys->env->getResultMsg() );
 893             return VLC_EGENERIC;
 894         }
 895
 896         /* Retrieve the timeout value and set up a timeout prevention thread */
 897         p_sys->i_timeout = p_sys->rtsp->sessionTimeoutParameter();
 898         if( p_sys->i_timeout > 0 && !p_sys->p_timeout )
 899         {
 900             msg_Dbg( p_demux, "We have a timeout of %d seconds",  p_sys->i_timeout );
 901             p_sys->p_timeout = (timeout_thread_t *)vlc_object_create( p_demux, sizeof(timeout_thread_t) );
 902             p_sys->p_timeout->p_sys = p_demux->p_sys; /* lol, object recursion :D */
 903             if( vlc_thread_create( p_sys->p_timeout, "liveMedia-timeout", TimeoutPrevention,
 904                                    VLC_THREAD_PRIORITY_LOW, VLC_TRUE ) )
 905             {
 906                 msg_Err( p_demux, "cannot spawn liveMedia timeout thread" );
 907                 vlc_object_destroy( p_sys->p_timeout );
 908             }
 909             msg_Dbg( p_demux, "spawned timeout thread" );
 910             vlc_object_attach( p_sys->p_timeout, p_demux );
 911         }
 912     }
 913     p_sys->i_pcr = 0;
 914
 915 #if 0
 916     /* TODO */
 917     for( i = 0; i < p_sys->i_track; i++ )
 918     {
 919         //p_sys->track[i]->i_pts = 0;
 920         p_sys->track[i]->i_start_seq = (int)p_sys->track[i]->sub->rtpInfo.seqNum;
 921         msg_Dbg( p_demux, "set startseq: %u", p_sys->track[i]->i_start_seq );
 922     }
 923 #endif
 924
 925 #if (LIVEMEDIA_LIBRARY_VERSION_INT >= 9999999999)
 926     /* Retrieve the starttime if possible */
 927     p_sys->i_npt_start = (int64_t)( p_sys->ms->playStartTime() * (double)1000000.0 );
 928 #else
 929     p_sys->i_npt_start = -1;
 930 #endif
 931     if( p_sys->i_npt_start < 0 )
 932     {
 933         p_sys->i_npt_start = -1;
 934         p_sys->i_npt = 0;
 935     }
 936     else
 937         p_sys->i_npt = p_sys->i_npt_start;
 938
 939 #if (LIVEMEDIA_LIBRARY_VERSION_INT >= 9999999999)
 940     /* Retrieve the duration if possible */
 941     p_sys->i_npt_length = (int64_t)( p_sys->ms->playEndTime() * (double)1000000.0 );
 942 #else
 943     p_sys->i_npt_length = -1;
 944 #endif
 945     if( p_sys->i_npt_length < 0 )
 946         p_sys->i_npt_length = -1;
 947
 948     msg_Dbg( p_demux, "play start: %lld stop:%lld", p_sys->i_npt_start, p_sys->i_npt_length );
 949     return VLC_SUCCESS;
 950 }
 951
 952
 953 /*****************************************************************************
 954  * Demux:
 955  *****************************************************************************/
 956 static int Demux( demux_t *p_demux )
 957 {
 958     demux_sys_t    *p_sys = p_demux->p_sys;
 959     TaskToken      task;
 960
 961     vlc_bool_t      b_send_pcr = VLC_TRUE;
 962     int64_t         i_pcr = 0;
 963     int             i;
 964
 965     /* Check if we need to send the server a Keep-A-Live signal */
 966     if( p_sys->b_timeout_call && p_sys->rtsp && p_sys->ms )
 967     {
 968         char *psz_bye = NULL;
 969         p_sys->rtsp->getMediaSessionParameter( *p_sys->ms, NULL, psz_bye );
 970         p_sys->b_timeout_call = VLC_FALSE;
 971     }
 972
 973
 974     for( i = 0; i < p_sys->i_track; i++ )
 975     {
 976         live_track_t *tk = p_sys->track[i];
 977
 978         if( tk->b_asf || tk->b_muxed )
 979             b_send_pcr = VLC_FALSE;
 980 #if 0
 981         if( i_pcr == 0 )
 982         {
 983             i_pcr = tk->i_pts;
 984         }
 985         else if( tk->i_pts != 0 && i_pcr > tk->i_pts )
 986         {
 987             i_pcr = tk->i_pts ;
 988         }
 989 #endif
 990     }
 991     if( p_sys->i_pcr > 0 )
 992     {
 993         if( b_send_pcr )
 994             es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_sys->i_pcr );
 995     }
 996
 997     /* First warn we want to read data */
 998     p_sys->event = 0;
 999     for( i = 0; i < p_sys->i_track; i++ )
1000     {
1001         live_track_t *tk = p_sys->track[i];
1002
1003         if( tk->waiting == 0 )
1004         {
1005             tk->waiting = 1;
1006             tk->sub->readSource()->getNextFrame( tk->p_buffer, tk->i_buffer,
1007                                           StreamRead, tk, StreamClose, tk );
1008         }
1009     }
1010     /* Create a task that will be called if we wait more than 300ms */
1011     task = p_sys->scheduler->scheduleDelayedTask( 300000, TaskInterrupt, p_demux );
1012
1013     /* Do the read */
1014     p_sys->scheduler->doEventLoop( &p_sys->event );
1015
1016     /* remove the task */
1017     p_sys->scheduler->unscheduleDelayedTask( task );
1018
1019     /* Check for gap in pts value */
1020     for( i = 0; i < p_sys->i_track; i++ )
1021     {
1022         live_track_t *tk = p_sys->track[i];
1023
1024         if( !tk->b_muxed && !tk->b_rtcp_sync &&
1025             tk->sub->rtpSource() && tk->sub->rtpSource()->hasBeenSynchronizedUsingRTCP() )
1026         {
1027             msg_Dbg( p_demux, "tk->rtpSource->hasBeenSynchronizedUsingRTCP()" );
1028
1029             es_out_Control( p_demux->out, ES_OUT_RESET_PCR );
1030             tk->b_rtcp_sync = VLC_TRUE;
1031 #if 0
1032             /* reset PCR */
1033             tk->i_pts = 0;
1034             p_sys->i_pcr = 0;
1035             i_pcr = 0;
1036 #endif
1037         }
1038     }
1039
1040     if( p_sys->b_multicast && p_sys->b_no_data && p_sys->i_no_data_ti > 120 )
1041     {
1042         /* FIXME Make this configurable
1043         msg_Err( p_demux, "no multicast data received in 36s, aborting" );
1044         return 0;
1045         */
1046     }
1047     else if( !p_sys->b_multicast && p_sys->b_no_data && p_sys->i_no_data_ti > 34 )
1048     {
1049         vlc_bool_t b_rtsp_tcp = var_GetBool( p_demux, "rtsp-tcp" );
1050
1051         if( !b_rtsp_tcp && p_sys->rtsp && p_sys->ms )
1052         {
1053             msg_Warn( p_demux, "no data received in 10s. Switching to TCP" );
1054             if( RollOverTcp( p_demux ) )
1055             {
1056                 msg_Err( p_demux, "TCP rollover failed, aborting" );
1057                 return 0;
1058             }
1059         }
1060         else if( p_sys->i_no_data_ti > 34 )
1061         {
1062             msg_Err( p_demux, "no data received in 10s, aborting" );
1063             return 0;
1064         }
1065     }
1066     else if( !p_sys->b_multicast && p_sys->b_no_data && p_sys->i_no_data_ti > 34 )
1067     {
1068         /* EOF ? */
1069         msg_Warn( p_demux, "no data received in 10s, eof ?" );
1070         return 0;
1071     }
1072     return p_demux->b_error ? 0 : 1;
1073 }
1074
1075 /*****************************************************************************
1076  * Control:
1077  *****************************************************************************/
1078 static int Control( demux_t *p_demux, int i_query, va_list args )
1079 {
1080     demux_sys_t *p_sys = p_demux->p_sys;
1081     int64_t *pi64;
1082     double  *pf, f;
1083     vlc_bool_t *pb, b_bool;
1084
1085     switch( i_query )
1086     {
1087         case DEMUX_GET_TIME:
1088             pi64 = (int64_t*)va_arg( args, int64_t * );
1089             if( p_sys->i_npt > 0 )
1090             {
1091                 *pi64 = p_sys->i_npt;
1092                 return VLC_SUCCESS;
1093             }
1094             return VLC_EGENERIC;
1095
1096         case DEMUX_GET_LENGTH:
1097             pi64 = (int64_t*)va_arg( args, int64_t * );
1098             if( p_sys->i_npt_length > 0 )
1099             {
1100                 *pi64 = p_sys->i_npt_length;
1101                 return VLC_SUCCESS;
1102             }
1103             return VLC_EGENERIC;
1104
1105         case DEMUX_GET_POSITION:
1106             pf = (double*)va_arg( args, double* );
1107             if( p_sys->i_npt_length > 0 && p_sys->i_npt > 0 )
1108             {
1109                 *pf = (double)p_sys->i_npt / (double)p_sys->i_npt_length;
1110                 return VLC_SUCCESS;
1111             }
1112             return VLC_EGENERIC;
1113
1114         case DEMUX_SET_POSITION:
1115         {
1116             float time;
1117
1118             f = (double)va_arg( args, double );
1119             if( p_sys->rtsp && p_sys->i_npt_length > 0 )
1120             {
1121                 int i;
1122                 time = f * (double)p_sys->i_npt_length / 1000000.0;   /* in second */
1123                 if( !p_sys->rtsp->playMediaSession( *p_sys->ms, time, -1, 1 ) )
1124                 {
1125                     msg_Err( p_demux, "PLAY failed %s",
1126                         p_sys->env->getResultMsg() );
1127                     return VLC_EGENERIC;
1128                 }
1129                 es_out_Control( p_demux->out, ES_OUT_RESET_PCR );
1130                 p_sys->i_pcr = 0;
1131 #if 0
1132                 /* Retrieve RTP-Info values */
1133                 for( i = 0; i < p_sys->i_track; i++ )
1134                 {
1135                     //p_sys->track[i]->i_pts = 0;
1136                     p_sys->track[i]->i_start_seq = p_sys->track[i]->sub->rtpInfo.seqNum;
1137                     msg_Dbg( p_demux, "set pos startseq: %u", p_sys->track[i]->i_start_seq );
1138                 }
1139 #endif
1140 #if (LIVEMEDIA_LIBRARY_VERSION_INT >= 9999999999)
1141                 /* Retrieve the starttime if possible */
1142                 p_sys->i_npt_start = (int64_t)( p_sys->ms->playStartTime() * (double)1000000.0 );
1143 #else
1144                 p_sys->i_npt_start = -1;
1145 #endif
1146                 if( p_sys->i_npt_start < 0 )
1147                 {
1148                     p_sys->i_npt_start = -1;
1149                     p_sys->i_npt = 0;
1150                 }
1151                 else
1152                     p_sys->i_npt = p_sys->i_npt_start;
1153
1154 #if (LIVEMEDIA_LIBRARY_VERSION_INT >= 9999999999)
1155                 /* Retrieve the duration if possible */
1156                 p_sys->i_npt_length = (int64_t)( p_sys->ms->playEndTime() * (double)1000000.0 );
1157 #else
1158                 p_sys->i_npt_length = -1;
1159 #endif
1160                 if( p_sys->i_npt_length < 0 )
1161                     p_sys->i_npt_length = -1;
1162
1163                 msg_Dbg( p_demux, "seek start: %lld stop:%lld", p_sys->i_npt_start, p_sys->i_npt_length );
1164                 return VLC_SUCCESS;
1165             }
1166             return VLC_EGENERIC;
1167         }
1168         /* Special for access_demux */
1169         case DEMUX_CAN_PAUSE:
1170             pb = (vlc_bool_t*)va_arg( args, vlc_bool_t * );
1171             if( p_sys->rtsp && p_sys->i_npt_length )
1172                 /* Not always true, but will be handled in SET_PAUSE_STATE */
1173                 *pb = VLC_TRUE;
1174             else
1175                 *pb = VLC_FALSE;
1176             return VLC_SUCCESS;
1177
1178         case DEMUX_CAN_CONTROL_PACE:
1179             pb = (vlc_bool_t*)va_arg( args, vlc_bool_t * );
1180
1181 #if 1       /* Disable for now until we have a clock synchro algo
1182              * which works with something else than MPEG over UDP */
1183             *pb = VLC_FALSE;
1184 #else
1185             *pb = VLC_TRUE;
1186 #endif
1187             return VLC_SUCCESS;
1188
1189         case DEMUX_SET_PAUSE_STATE:
1190         {
1191             double d_npt = (double) p_sys->i_npt / I64C(1000000);
1192             int i;
1193
1194             b_bool = (vlc_bool_t)va_arg( args, vlc_bool_t );
1195             if( p_sys->rtsp == NULL )
1196                 return VLC_EGENERIC;
1197
1198             /* FIXME */
1199             if( ( b_bool && !p_sys->rtsp->pauseMediaSession( *p_sys->ms ) ) ||
1200                     ( !b_bool && !p_sys->rtsp->playMediaSession( *p_sys->ms,
1201                       d_npt > 0 ? d_npt : -1 ) ) )
1202             {
1203                     msg_Err( p_demux, "PLAY or PAUSE failed %s", p_sys->env->getResultMsg() );
1204                     return VLC_EGENERIC;
1205             }
1206             es_out_Control( p_demux->out, ES_OUT_RESET_PCR );
1207             p_sys->i_pcr = 0;
1208 #if 0
1209             for( i = 0; i < p_sys->i_track; i++ )
1210             {
1211                 //p_sys->track[i]->i_pts = 0;
1212                 p_sys->track[i]->i_start_seq = p_sys->track[i]->sub->rtpInfo.seqNum;
1213                 msg_Dbg( p_demux, "set pause startseq: %u", p_sys->track[i]->i_start_seq );
1214             }
1215 #endif
1216 #if (LIVEMEDIA_LIBRARY_VERSION_INT >= 9999999999)
1217             /* Retrieve the starttime if possible */
1218             p_sys->i_npt_start = (int64_t)( p_sys->ms->playStartTime() * (double)1000000.0 );
1219 #else
1220             p_sys->i_npt_start = -1;
1221 #endif
1222             if( p_sys->i_npt_start < 0 )
1223             {
1224                 p_sys->i_npt_start = -1;
1225                 p_sys->i_npt = 0;
1226             }
1227             else
1228                 p_sys->i_npt = p_sys->i_npt_start;
1229
1230 #if (LIVEMEDIA_LIBRARY_VERSION_INT >= 9999999999)
1231             /* Retrieve the duration if possible */
1232             p_sys->i_npt_length = (int64_t)( p_sys->ms->playEndTime() * (double)1000000.0 );
1233 #else
1234             p_sys->i_npt_length = -1;
1235 #endif
1236             if( p_sys->i_npt_length < 0 )
1237                 p_sys->i_npt_length = -1;
1238
1239             msg_Dbg( p_demux, "pause start: %lld stop:%lld", p_sys->i_npt_start, p_sys->i_npt_length );
1240             return VLC_SUCCESS;
1241         }
1242         case DEMUX_GET_TITLE_INFO:
1243         case DEMUX_SET_TITLE:
1244         case DEMUX_SET_SEEKPOINT:
1245             return VLC_EGENERIC;
1246
1247         case DEMUX_GET_PTS_DELAY:
1248             pi64 = (int64_t*)va_arg( args, int64_t * );
1249             *pi64 = (int64_t)var_GetInteger( p_demux, "rtsp-caching" ) * 1000;
1250             return VLC_SUCCESS;
1251
1252         default:
1253             return VLC_EGENERIC;
1254     }
1255 }
1256
1257 /*****************************************************************************
1258  * RollOverTcp: reopen the rtsp into TCP mode
1259  * XXX: ugly, a lot of code are duplicated from Open()
1260  * This should REALLY be fixed
1261  *****************************************************************************/
1262 static int RollOverTcp( demux_t *p_demux )
1263 {
1264     demux_sys_t *p_sys = p_demux->p_sys;
1265     int i, i_return;
1266
1267     var_SetBool( p_demux, "rtsp-tcp", VLC_TRUE );
1268
1269     /* We close the old RTSP session */
1270     for( i = 0; i < p_sys->i_track; i++ )
1271     {
1272         live_track_t *tk = p_sys->track[i];
1273
1274         if( tk->b_muxed ) stream_DemuxDelete( tk->p_out_muxed );
1275         free( tk->p_buffer );
1276         free( tk );
1277     }
1278     if( p_sys->i_track ) free( p_sys->track );
1279     if( p_sys->p_out_asf ) stream_DemuxDelete( p_sys->p_out_asf );
1280
1281     p_sys->rtsp->teardownMediaSession( *p_sys->ms );
1282     Medium::close( p_sys->ms );
1283     RTSPClient::close( p_sys->rtsp );
1284
1285     p_sys->ms = NULL;
1286     p_sys->rtsp = NULL;
1287     p_sys->track = NULL;
1288     p_sys->i_track = 0;
1289
1290     /* Reopen rtsp client */
1291     if( p_demux->s != NULL && ( i_return = Connect( p_demux ) ) != VLC_SUCCESS )
1292     {
1293         msg_Err( p_demux, "Failed to connect with rtsp://%s", p_sys->psz_path );
1294         goto error;
1295     }
1296
1297     if( p_sys->p_sdp == NULL )
1298     {
1299         msg_Err( p_demux, "Failed to retrieve the RTSP Session Description" );
1300         goto error;
1301     }
1302
1303     if( ( i_return = SessionsSetup( p_demux ) ) != VLC_SUCCESS )
1304     {
1305         msg_Err( p_demux, "Nothing to play for rtsp://%s", p_sys->psz_path );
1306         goto error;
1307     }
1308
1309     if( ( i_return = Play( p_demux ) ) != VLC_SUCCESS )
1310         goto error;
1311
1312     return VLC_SUCCESS;
1313
1314 error:
1315     return VLC_EGENERIC;
1316 }
1317
1318
1319 /*****************************************************************************
1320  *
1321  *****************************************************************************/
1322 static void StreamRead( void *p_private, unsigned int i_size,
1323                         unsigned int i_truncated_bytes, struct timeval pts,
1324                         unsigned int duration )
1325 {
1326     live_track_t   *tk = (live_track_t*)p_private;
1327     demux_t        *p_demux = tk->p_demux;
1328     demux_sys_t    *p_sys = p_demux->p_sys;
1329     block_t        *p_block;
1330
1331     msg_Dbg( p_demux, "pts: %d", pts.tv_sec );
1332
1333     int64_t i_pts = (uint64_t)pts.tv_sec * UI64C(1000000) +
1334         (uint64_t)pts.tv_usec;
1335
1336     /* XXX Beurk beurk beurk Avoid having negative value XXX */
1337     i_pts &= UI64C(0x00ffffffffffffff);
1338
1339     if( tk->b_quicktime && tk->p_es == NULL )
1340     {
1341         QuickTimeGenericRTPSource *qtRTPSource =
1342             (QuickTimeGenericRTPSource*)tk->sub->rtpSource();
1343         QuickTimeGenericRTPSource::QTState &qtState = qtRTPSource->qtState;
1344         uint8_t *sdAtom = (uint8_t*)&qtState.sdAtom[4];
1345
1346         if( tk->fmt.i_cat == VIDEO_ES ) {
1347             if( qtState.sdAtomSize < 16 + 32 )
1348             {
1349                 /* invalid */
1350                 p_sys->event = 0xff;
1351                 tk->waiting = 0;
1352                 return;
1353             }
1354             tk->fmt.i_codec = VLC_FOURCC(sdAtom[0],sdAtom[1],sdAtom[2],sdAtom[3]);
1355             tk->fmt.video.i_width  = (sdAtom[28] << 8) | sdAtom[29];
1356             tk->fmt.video.i_height = (sdAtom[30] << 8) | sdAtom[31];
1357
1358             if( tk->fmt.i_codec == VLC_FOURCC('a', 'v', 'c', '1') )
1359             {
1360                 uint8_t *pos = (uint8_t*)qtRTPSource->qtState.sdAtom + 86;
1361                 uint8_t *endpos = (uint8_t*)qtRTPSource->qtState.sdAtom
1362                                   + qtRTPSource->qtState.sdAtomSize;
1363                 while (pos+8 < endpos) {
1364                     unsigned atomLength = pos[0]<<24 | pos[1]<<16 | pos[2]<<8 | pos[3];
1365                     if( atomLength == 0 || atomLength > endpos-pos) break;
1366                     if( memcmp(pos+4, "avcC", 4) == 0 &&
1367                         atomLength > 8 &&
1368                         atomLength <= INT_MAX )
1369                     {
1370                         tk->fmt.i_extra = atomLength-8;
1371                         tk->fmt.p_extra = malloc( tk->fmt.i_extra );
1372                         memcpy(tk->fmt.p_extra, pos+8, atomLength-8);
1373                         break;
1374                     }
1375                     pos += atomLength;
1376                 }
1377             }
1378             else
1379             {
1380                 tk->fmt.i_extra        = qtState.sdAtomSize - 16;
1381                 tk->fmt.p_extra        = malloc( tk->fmt.i_extra );
1382                 memcpy( tk->fmt.p_extra, &sdAtom[12], tk->fmt.i_extra );
1383             }
1384         }
1385         else {
1386             if( qtState.sdAtomSize < 4 )
1387             {
1388                 /* invalid */
1389                 p_sys->event = 0xff;
1390                 tk->waiting = 0;
1391                 return;
1392             }
1393             tk->fmt.i_codec = VLC_FOURCC(sdAtom[0],sdAtom[1],sdAtom[2],sdAtom[3]);
1394         }
1395         tk->p_es = es_out_Add( p_demux->out, &tk->fmt );
1396     }
1397
1398 #if 0
1399     fprintf( stderr, "StreamRead size=%d pts=%lld\n",
1400              i_size,
1401              pts.tv_sec * 1000000LL + pts.tv_usec );
1402 #endif
1403
1404     /* grow buffer if it looks like buffer is too small, but don't eat
1405      * up all the memory on strange streams */
1406     if( i_truncated_bytes > 0 && tk->i_buffer < 2000000 )
1407     {
1408         void *p_tmp;
1409         msg_Dbg( p_demux, "lost %d bytes", i_truncated_bytes );
1410         msg_Dbg( p_demux, "increasing buffer size to %d", tk->i_buffer * 2 );
1411         tk->i_buffer *= 2;
1412         p_tmp = realloc( tk->p_buffer, tk->i_buffer );
1413         if( p_tmp == NULL )
1414         {
1415             msg_Warn( p_demux, "realloc failed" );
1416         }
1417         else
1418         {
1419             tk->p_buffer = (uint8_t*)p_tmp;
1420         }
1421     }
1422     if( i_size > tk->i_buffer )
1423     {
1424         msg_Warn( p_demux, "buffer overflow" );
1425     }
1426     /* FIXME could i_size be > buffer size ? */
1427     if( tk->fmt.i_codec == VLC_FOURCC('s','a','m','r') ||
1428         tk->fmt.i_codec == VLC_FOURCC('s','a','w','b') )
1429     {
1430         AMRAudioSource *amrSource = (AMRAudioSource*)tk->sub->readSource();
1431
1432         p_block = block_New( p_demux, i_size + 1 );
1433         p_block->p_buffer[0] = amrSource->lastFrameHeader();
1434         memcpy( p_block->p_buffer + 1, tk->p_buffer, i_size );
1435     }
1436     else if( tk->fmt.i_codec == VLC_FOURCC('H','2','6','1') )
1437     {
1438 #if LIVEMEDIA_LIBRARY_VERSION_INT >= 1081468800
1439         H261VideoRTPSource *h261Source = (H261VideoRTPSource*)tk->sub->rtpSource();
1440         uint32_t header = h261Source->lastSpecialHeader();
1441 #else
1442         uint32_t header = 0;
1443         msg_Warn( p_demux, "need livemedia library >= \"2004.04.09\"" );
1444 #endif
1445         p_block = block_New( p_demux, i_size + 4 );
1446         memcpy( p_block->p_buffer, &header, 4 );
1447         memcpy( p_block->p_buffer + 4, tk->p_buffer, i_size );
1448
1449         if( tk->sub->rtpSource()->curPacketMarkerBit() )
1450             p_block->i_flags |= BLOCK_FLAG_END_OF_FRAME;
1451     }
1452     else if( tk->fmt.i_codec == VLC_FOURCC('h','2','6','4') )
1453     {
1454         if( (tk->p_buffer[0] & 0x1f) >= 24 )
1455             msg_Warn( p_demux, "unsupported NAL type for H264" );
1456
1457         /* Normal NAL type */
1458         p_block = block_New( p_demux, i_size + 4 );
1459         p_block->p_buffer[0] = 0x00;
1460         p_block->p_buffer[1] = 0x00;
1461         p_block->p_buffer[2] = 0x00;
1462         p_block->p_buffer[3] = 0x01;
1463         memcpy( &p_block->p_buffer[4], tk->p_buffer, i_size );
1464     }
1465     else if( tk->b_asf )
1466     {
1467         int i_copy = __MIN( p_sys->asfh.i_min_data_packet_size, (int)i_size );
1468         p_block = block_New( p_demux, p_sys->asfh.i_min_data_packet_size );
1469
1470         memcpy( p_block->p_buffer, tk->p_buffer, i_copy );
1471     }
1472     else
1473     {
1474         p_block = block_New( p_demux, i_size );
1475         memcpy( p_block->p_buffer, tk->p_buffer, i_size );
1476     }
1477
1478     /* Update NPT */
1479     //msg_Dbg( p_demux, "current %d, start_seq %u", (int)tk->sub->rtpSource()->curPacketRTPSeqNum(), tk->i_start_seq );
1480     if( (tk->fmt.i_cat == VIDEO_ES) && (p_sys->i_pcr < i_pts) &&
1481         (i_pts > 0) && (p_sys->i_pcr > 0) )
1482     {
1483         p_sys->i_npt += __MAX( 0, i_pts - p_sys->i_pcr );
1484         p_sys->i_pcr = i_pts;
1485         msg_Dbg( p_demux, "npt update" );
1486     }
1487     else if( (tk->fmt.i_cat == VIDEO_ES) && (p_sys->i_pcr < i_pts) )
1488     {
1489         p_sys->i_pcr = i_pts;
1490     }
1491     msg_Dbg( p_demux, "npt %lld", p_sys->i_npt );
1492
1493     if( (i_pts != tk->i_pts) && (!tk->b_muxed) )
1494     {
1495         p_block->i_dts = ( tk->fmt.i_cat == VIDEO_ES ) ? 0 : i_pts;
1496         p_block->i_pts = i_pts;
1497     }
1498
1499     if( tk->b_muxed )
1500     {
1501         stream_DemuxSend( tk->p_out_muxed, p_block );
1502     }
1503     else if( tk->b_asf )
1504     {
1505         stream_DemuxSend( p_sys->p_out_asf, p_block );
1506     }
1507     else
1508     {
1509         es_out_Send( p_demux->out, tk->p_es, p_block );
1510     }
1511
1512     /* warn that's ok */
1513     p_sys->event = 0xff;
1514
1515     /* we have read data */
1516     tk->waiting = 0;
1517     p_demux->p_sys->b_no_data = VLC_FALSE;
1518     p_demux->p_sys->i_no_data_ti = 0;
1519
1520     if( i_pts > 0 && !tk->b_muxed )
1521     {
1522         tk->i_pts = i_pts;
1523     }
1524 }
1525
1526 /*****************************************************************************
1527  *
1528  *****************************************************************************/
1529 static void StreamClose( void *p_private )
1530 {
1531     live_track_t   *tk = (live_track_t*)p_private;
1532     demux_t        *p_demux = tk->p_demux;
1533     demux_sys_t    *p_sys = p_demux->p_sys;
1534
1535     msg_Dbg( p_demux, "StreamClose" );
1536
1537     p_sys->event = 0xff;
1538     p_demux->b_error = VLC_TRUE;
1539 }
1540
1541
1542 /*****************************************************************************
1543  *
1544  *****************************************************************************/
1545 static void TaskInterrupt( void *p_private )
1546 {
1547     demux_t *p_demux = (demux_t*)p_private;
1548
1549     p_demux->p_sys->i_no_data_ti++;
1550
1551     /* Avoid lock */
1552     p_demux->p_sys->event = 0xff;
1553 }
1554
1555 /*****************************************************************************
1556  *
1557  *****************************************************************************/
1558 static void TimeoutPrevention( timeout_thread_t *p_timeout )
1559 {
1560     p_timeout->b_die = VLC_FALSE;
1561     p_timeout->i_remain = (int64_t)p_timeout->p_sys->i_timeout -2;
1562     p_timeout->i_remain *= 1000000;
1563
1564     vlc_thread_ready( p_timeout );
1565
1566     /* Avoid lock */
1567     while( !p_timeout->b_die )
1568     {
1569         if( p_timeout->i_remain <= 0 )
1570         {
1571             p_timeout->i_remain = (int64_t)p_timeout->p_sys->i_timeout -2;
1572             p_timeout->i_remain *= 1000000;
1573             p_timeout->p_sys->b_timeout_call = VLC_TRUE;
1574             msg_Dbg( p_timeout, "reset the timeout timer" );
1575         }
1576         p_timeout->i_remain -= 200000;
1577         msleep( 200000 ); /* 200 ms */
1578     }
1579 }
1580
1581 /*****************************************************************************
1582  *
1583  *****************************************************************************/
1584 static int b64_decode( char *dest, char *src );
1585
1586 static int ParseASF( demux_t *p_demux )
1587 {
1588     demux_sys_t    *p_sys = p_demux->p_sys;
1589
1590     const char *psz_marker = "a=pgmpu:data:application/vnd.ms.wms-hdr.asfv1;base64,";
1591     char *psz_asf = strcasestr( p_sys->p_sdp, psz_marker );
1592     char *psz_end;
1593     block_t *p_header;
1594
1595     /* Parse the asf header */
1596     if( psz_asf == NULL )
1597         return VLC_EGENERIC;
1598
1599     psz_asf += strlen( psz_marker );
1600     psz_asf = strdup( psz_asf );    /* Duplicate it */
1601     psz_end = strchr( psz_asf, '\n' );
1602
1603     while( psz_end > psz_asf && ( *psz_end == '\n' || *psz_end == '\r' ) )
1604         *psz_end-- = '\0';
1605
1606     if( psz_asf >= psz_end )
1607     {
1608         free( psz_asf );
1609         return VLC_EGENERIC;
1610     }
1611
1612     /* Always smaller */
1613     p_header = block_New( p_demux, psz_end - psz_asf );
1614     p_header->i_buffer = b64_decode( (char*)p_header->p_buffer, psz_asf );
1615     //msg_Dbg( p_demux, "Size=%d Hdrb64=%s", p_header->i_buffer, psz_asf );
1616     if( p_header->i_buffer <= 0 )
1617     {
1618         free( psz_asf );
1619         return VLC_EGENERIC;
1620     }
1621
1622     /* Parse it to get packet size */
1623     E_(asf_HeaderParse)( &p_sys->asfh, p_header->p_buffer, p_header->i_buffer );
1624
1625     /* Send it to demuxer */
1626     stream_DemuxSend( p_sys->p_out_asf, p_header );
1627
1628     free( psz_asf );
1629     return VLC_SUCCESS;
1630 }
1631
1632
1633 static unsigned char* parseH264ConfigStr( char const* configStr,
1634                                           unsigned int& configSize )
1635 {
1636     char *dup, *psz;
1637     int i, i_records = 1;
1638
1639     if( configSize )
1640     configSize = 0;
1641
1642     if( configStr == NULL || *configStr == '\0' )
1643         return NULL;
1644
1645     psz = dup = strdup( configStr );
1646
1647     /* Count the number of comma's */
1648     for( psz = dup; *psz != '\0'; ++psz )
1649     {
1650         if( *psz == ',')
1651         {
1652             ++i_records;
1653             *psz = '\0';
1654         }
1655     }
1656
1657     unsigned char *cfg = new unsigned char[5 * strlen(dup)];
1658     psz = dup;
1659     for( i = 0; i < i_records; i++ )
1660     {
1661         cfg[configSize++] = 0x00;
1662         cfg[configSize++] = 0x00;
1663         cfg[configSize++] = 0x00;
1664         cfg[configSize++] = 0x01;
1665
1666         configSize += b64_decode( (char*)&cfg[configSize], psz );
1667         psz += strlen(psz)+1;
1668     }
1669
1670     if( dup ) free( dup );
1671     return cfg;
1672 }
1673
1674 /*char b64[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";*/
1675 static int b64_decode( char *dest, char *src )
1676 {
1677     const char *dest_start = dest;
1678     int  i_level;
1679     int  last = 0;
1680     int  b64[256] = {
1681         -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,  /* 00-0F */
1682         -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,  /* 10-1F */
1683         -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,62,-1,-1,-1,63,  /* 20-2F */
1684         52,53,54,55,56,57,58,59,60,61,-1,-1,-1,-1,-1,-1,  /* 30-3F */
1685         -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,10,11,12,13,14,  /* 40-4F */
1686         15,16,17,18,19,20,21,22,23,24,25,-1,-1,-1,-1,-1,  /* 50-5F */
1687         -1,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,  /* 60-6F */
1688         41,42,43,44,45,46,47,48,49,50,51,-1,-1,-1,-1,-1,  /* 70-7F */
1689         -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,  /* 80-8F */
1690         -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,  /* 90-9F */
1691         -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,  /* A0-AF */
1692         -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,  /* B0-BF */
1693         -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,  /* C0-CF */
1694         -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,  /* D0-DF */
1695         -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,  /* E0-EF */
1696         -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1   /* F0-FF */
1697         };
1698
1699     for( i_level = 0; *src != '\0'; src++ )
1700     {
1701         int  c;
1702
1703         c = b64[(unsigned int)*src];
1704         if( c == -1 )
1705         {
1706             continue;
1707         }
1708
1709         switch( i_level )
1710         {
1711             case 0:
1712                 i_level++;
1713                 break;
1714             case 1:
1715                 *dest++ = ( last << 2 ) | ( ( c >> 4)&0x03 );
1716                 i_level++;
1717                 break;
1718             case 2:
1719                 *dest++ = ( ( last << 4 )&0xf0 ) | ( ( c >> 2 )&0x0f );
1720                 i_level++;
1721                 break;
1722             case 3:
1723                 *dest++ = ( ( last &0x03 ) << 6 ) | c;
1724                 i_level = 0;
1725         }
1726         last = c;
1727     }
1728
1729     *dest = '\0';
1730
1731     return dest - dest_start;
1732 }