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 <string.h>
  32
  33 #include <vlc_demux.h>
  34 #include <vlc_interface.h>
  35 #include <vlc_network.h>
  36
  37 #include <iostream>
  38
  39 #if defined( WIN32 )
  40 #   include <winsock2.h>
  41 #endif
  42
  43 #include "BasicUsageEnvironment.hh"
  44 #include "GroupsockHelper.hh"
  45 #include "liveMedia.hh"
  46
  47 extern "C" {
  48 #include "../access/mms/asf.h"  /* Who said ugly ? */
  49 }
  50
  51 using namespace std;
  52
  53 /*****************************************************************************
  54  * Module descriptor
  55  *****************************************************************************/
  56 static int  Open ( vlc_object_t * );
  57 static void Close( vlc_object_t * );
  58
  59 #define CACHING_TEXT N_("Caching value (ms)")
  60 #define CACHING_LONGTEXT N_( \
  61     "Allows you to modify the default caching value for RTSP streams. This " \
  62     "value should be set in millisecond units." )
  63
  64 #define KASENNA_TEXT N_( "Kasenna RTSP dialect")
  65 #define KASENNA_LONGTEXT N_( "Kasenna servers use an old and unstandard " \
  66     "dialect of RTSP. When you set this parameter, VLC will try this dialect "\
  67     "for communication. In this mode you cannot connect to normal RTSP servers." )
  68
  69 #define USER_TEXT N_("RTSP user name")
  70 #define USER_LONGTEXT N_("Allows you to modify the user name that will " \
  71     "be used for authenticating the connection.")
  72 #define PASS_TEXT N_("RTSP password")
  73 #define PASS_LONGTEXT N_("Allows you to modify the password that will be " \
  74     "used for the connection.")
  75
  76 vlc_module_begin();
  77     set_description( _("RTP/RTSP/SDP demuxer (using Live555)" ) );
  78     set_capability( "demux2", 50 );
  79     set_shortname( "RTP/RTSP");
  80     set_callbacks( Open, Close );
  81     add_shortcut( "live" );
  82     add_shortcut( "livedotcom" );
  83     set_category( CAT_INPUT );
  84     set_subcategory( SUBCAT_INPUT_DEMUX );
  85
  86     add_submodule();
  87         set_description( _("RTSP/RTP access and demux") );
  88         add_shortcut( "rtsp" );
  89         add_shortcut( "sdp" );
  90         set_capability( "access_demux", 0 );
  91         set_callbacks( Open, Close );
  92         add_bool( "rtsp-tcp", 0, NULL,
  93                   N_("Use RTP over RTSP (TCP)"),
  94                   N_("Use RTP over RTSP (TCP)"), VLC_TRUE );
  95         add_integer( "rtp-client-port", -1, NULL,
  96                   N_("Client port"),
  97                   N_("Port to use for the RTP source of the session"), VLC_TRUE );
  98         add_bool( "rtsp-http", 0, NULL,
  99                   N_("Tunnel RTSP and RTP over HTTP"),
 100                   N_("Tunnel RTSP and RTP over HTTP"), VLC_TRUE );
 101         add_integer( "rtsp-http-port", 80, NULL,
 102                   N_("HTTP tunnel port"),
 103                   N_("Port to use for tunneling the RTSP/RTP over HTTP."),
 104                   VLC_TRUE );
 105         add_integer("rtsp-caching", 4 * DEFAULT_PTS_DELAY / 1000, NULL,
 106                     CACHING_TEXT, CACHING_LONGTEXT, VLC_TRUE );
 107         add_bool(   "rtsp-kasenna", VLC_FALSE, NULL, KASENNA_TEXT,
 108                     KASENNA_LONGTEXT, VLC_TRUE );
 109         add_string( "rtsp-user", NULL, NULL, USER_TEXT,
 110                     USER_LONGTEXT, VLC_TRUE );
 111         add_string( "rtsp-pwd", NULL, NULL, PASS_TEXT,
 112                     PASS_LONGTEXT, VLC_TRUE );
 113 vlc_module_end();
 114
 115
 116 /*****************************************************************************
 117  * Local prototypes
 118  *****************************************************************************/
 119
 120 typedef struct
 121 {
 122     demux_t         *p_demux;
 123     MediaSubsession *sub;
 124
 125     es_format_t     fmt;
 126     es_out_id_t     *p_es;
 127
 128     vlc_bool_t      b_muxed;
 129     vlc_bool_t      b_quicktime;
 130     vlc_bool_t      b_asf;
 131     stream_t        *p_out_muxed;    /* for muxed stream */
 132
 133     uint8_t         *p_buffer;
 134     unsigned int    i_buffer;
 135
 136     vlc_bool_t      b_rtcp_sync;
 137     char            waiting;
 138     int64_t         i_pts;
 139     u_int32_t       i_start_seq;
 140
 141 } live_track_t;
 142
 143 struct timeout_thread_t
 144 {
 145     VLC_COMMON_MEMBERS
 146
 147     int64_t      i_remain;
 148     demux_sys_t  *p_sys;
 149 };
 150
 151 struct demux_sys_t
 152 {
 153     char            *p_sdp;    /* XXX mallocated */
 154     char            *psz_path; /* URL-encoded path */
 155
 156     MediaSession     *ms;
 157     TaskScheduler    *scheduler;
 158     UsageEnvironment *env ;
 159     RTSPClient       *rtsp;
 160
 161     /* */
 162     int              i_track;
 163     live_track_t     **track;   /* XXX mallocated */
 164
 165     /* Weird formats */
 166     asf_header_t     asfh;
 167     stream_t         *p_out_asf;
 168     vlc_bool_t       b_real;
 169
 170     /* */
 171     int64_t          i_pcr; /* The clock */
 172     int64_t          i_npt; /* The current time in the stream */
 173     int64_t          i_npt_length;
 174     int64_t          i_npt_start;
 175
 176     /* timeout thread information */
 177     int              i_timeout;     /* session timeout value in seconds */
 178     vlc_bool_t       b_timeout_call;/* mark to send an RTSP call to prevent server timeout */
 179     timeout_thread_t *p_timeout;    /* the actual thread that makes sure we don't timeout */
 180
 181     /* */
 182     vlc_bool_t       b_multicast;   /* true if one of the tracks is multicasted */
 183     vlc_bool_t       b_no_data;     /* true if we never receive any data */
 184     int              i_no_data_ti;  /* consecutive number of TaskInterrupt */
 185
 186     char             event;
 187 };
 188
 189 static int Demux  ( demux_t * );
 190 static int Control( demux_t *, int, va_list );
 191
 192 static int Connect      ( demux_t * );
 193 static int SessionsSetup( demux_t * );
 194 static int Play         ( demux_t *);
 195 static int ParseASF     ( demux_t * );
 196 static int RollOverTcp  ( demux_t * );
 197
 198 static void StreamRead  ( void *, unsigned int, unsigned int,
 199                           struct timeval, unsigned int );
 200 static void StreamClose ( void * );
 201 static void TaskInterrupt( void * );
 202
 203 static void TimeoutPrevention( timeout_thread_t * );
 204
 205 static unsigned char* parseH264ConfigStr( char const* configStr,
 206                                           unsigned int& configSize );
 207
 208 /*****************************************************************************
 209  * DemuxOpen:
 210  *****************************************************************************/
 211 static int  Open ( vlc_object_t *p_this )
 212 {
 213     demux_t     *p_demux = (demux_t*)p_this;
 214     demux_sys_t *p_sys = NULL;
 215
 216     MediaSubsessionIterator *iter   = NULL;
 217     MediaSubsession         *sub    = NULL;
 218     int i, i_return;
 219
 220     if( p_demux->s )
 221     {
 222         /* See if it looks like a SDP
 223            v, o, s fields are mandatory and in this order */
 224         const uint8_t *p_peek;
 225         if( stream_Peek( p_demux->s, &p_peek, 7 ) < 7 ) return VLC_EGENERIC;
 226
 227         if( memcmp( p_peek, "v=0\r\n", 5 ) &&
 228             memcmp( p_peek, "v=0\n", 4 ) &&
 229             ( p_peek[0] < 'a' || p_peek[0] > 'z' || p_peek[1] != '=' ) )
 230         {
 231             return VLC_EGENERIC;
 232         }
 233     }
 234     else
 235     {
 236         var_Create( p_demux, "rtsp-caching", VLC_VAR_INTEGER|VLC_VAR_DOINHERIT );
 237     }
 238
 239     p_demux->pf_demux  = Demux;
 240     p_demux->pf_control= Control;
 241     p_demux->p_sys     = p_sys = (demux_sys_t*)malloc( sizeof( demux_sys_t ) );
 242     if( !p_sys ) return VLC_ENOMEM;
 243
 244     p_sys->p_sdp = NULL;
 245     p_sys->scheduler = NULL;
 246     p_sys->env = NULL;
 247     p_sys->ms = NULL;
 248     p_sys->rtsp = NULL;
 249     p_sys->i_track = 0;
 250     p_sys->track   = NULL;
 251     p_sys->i_pcr = 0;
 252     p_sys->i_npt = 0;
 253     p_sys->i_npt_start = 0;
 254     p_sys->i_npt_length = 0;
 255     p_sys->p_out_asf = NULL;
 256     p_sys->b_no_data = VLC_TRUE;
 257     p_sys->i_no_data_ti = 0;
 258     p_sys->p_timeout = NULL;
 259     p_sys->i_timeout = 0;
 260     p_sys->b_timeout_call = VLC_FALSE;
 261     p_sys->b_multicast = VLC_FALSE;
 262     p_sys->b_real = VLC_FALSE;
 263     p_sys->psz_path = strdup( p_demux->psz_path );
 264
 265     if( ( p_sys->scheduler = BasicTaskScheduler::createNew() ) == NULL )
 266     {
 267         msg_Err( p_demux, "BasicTaskScheduler::createNew failed" );
 268         goto error;
 269     }
 270     if( !( p_sys->env = BasicUsageEnvironment::createNew(*p_sys->scheduler) ) )
 271     {
 272         msg_Err( p_demux, "BasicUsageEnvironment::createNew failed" );
 273         goto error;
 274     }
 275
 276     if( strcasecmp( p_demux->psz_access, "sdp" ) )
 277     {
 278         char *p = p_sys->psz_path;
 279         while( (p = strchr( p, ' ' )) != NULL ) *p = '+';
 280     }
 281
 282     if( p_demux->s != NULL )
 283     {
 284         /* Gather the complete sdp file */
 285         int     i_sdp       = 0;
 286         int     i_sdp_max   = 1000;
 287         uint8_t *p_sdp      = (uint8_t*) malloc( i_sdp_max );
 288
 289         for( ;; )
 290         {
 291             int i_read = stream_Read( p_demux->s, &p_sdp[i_sdp],
 292                                       i_sdp_max - i_sdp - 1 );
 293
 294             if( i_read < 0 )
 295             {
 296                 msg_Err( p_demux, "failed to read SDP" );
 297                 free( p_sys );
 298                 return VLC_EGENERIC;
 299             }
 300
 301             i_sdp += i_read;
 302
 303             if( i_read < i_sdp_max - i_sdp - 1 )
 304             {
 305                 p_sdp[i_sdp] = '\0';
 306                 break;
 307             }
 308
 309             i_sdp_max += 1000;
 310             p_sdp = (uint8_t*)realloc( p_sdp, i_sdp_max );
 311         }
 312         p_sys->p_sdp = (char*)p_sdp;
 313     }
 314     else if( p_demux->s == NULL && !strcasecmp( p_demux->psz_access, "sdp" ) )
 315     {
 316         /* sdp:// link from SAP */
 317         p_sys->p_sdp = strdup( p_sys->psz_path );
 318     }
 319     else if( ( i_return = Connect( p_demux ) ) != VLC_SUCCESS )
 320     {
 321         msg_Err( p_demux, "Failed to connect with rtsp://%s", p_sys->psz_path );
 322         goto error;
 323     }
 324
 325     if( p_sys->p_sdp == NULL )
 326     {
 327         msg_Err( p_demux, "Failed to retrieve the RTSP Session Description" );
 328         goto error;
 329     }
 330
 331     if( ( i_return = SessionsSetup( p_demux ) ) != VLC_SUCCESS )
 332     {
 333         msg_Err( p_demux, "Nothing to play for rtsp://%s", p_sys->psz_path );
 334         goto error;
 335     }
 336
 337     if( p_sys->b_real ) goto error;
 338
 339     if( ( i_return = Play( p_demux ) ) != VLC_SUCCESS )
 340         goto error;
 341
 342     if( p_sys->p_out_asf && ParseASF( p_demux ) )
 343     {
 344         msg_Err( p_demux, "cannot find a usable asf header" );
 345         /* TODO Clean tracks */
 346         goto error;
 347     }
 348
 349     if( p_sys->i_track <= 0 )
 350         goto error;
 351
 352     return VLC_SUCCESS;
 353
 354 error:
 355     for( i = 0; i < p_sys->i_track; i++ )
 356     {
 357         live_track_t *tk = p_sys->track[i];
 358
 359         if( tk->b_muxed ) stream_DemuxDelete( tk->p_out_muxed );
 360         free( tk->p_buffer );
 361         free( tk );
 362     }
 363
 364     if( p_sys->i_track ) free( p_sys->track );
 365     if( p_sys->p_out_asf ) stream_DemuxDelete( p_sys->p_out_asf );
 366     if( p_sys->rtsp && p_sys->ms ) p_sys->rtsp->teardownMediaSession( *p_sys->ms );
 367     if( p_sys->ms ) Medium::close( p_sys->ms );
 368     if( p_sys->rtsp ) RTSPClient::close( p_sys->rtsp );
 369     if( p_sys->env ) p_sys->env->reclaim();
 370     if( p_sys->p_timeout )
 371     {
 372         vlc_object_kill( p_sys->p_timeout );
 373         vlc_thread_join( p_sys->p_timeout );
 374         vlc_object_detach( p_sys->p_timeout );
 375         vlc_object_destroy( p_sys->p_timeout );
 376     }
 377     if( p_sys->scheduler ) delete p_sys->scheduler;
 378     if( p_sys->p_sdp ) free( p_sys->p_sdp );
 379     if( p_sys->psz_path ) free( p_sys->psz_path );
 380
 381     free( p_sys );
 382     return VLC_EGENERIC;
 383 }
 384
 385 /*****************************************************************************
 386  * DemuxClose:
 387  *****************************************************************************/
 388 static void Close( vlc_object_t *p_this )
 389 {
 390     demux_t *p_demux = (demux_t*)p_this;
 391     demux_sys_t *p_sys = p_demux->p_sys;
 392     int i;
 393
 394     for( i = 0; i < p_sys->i_track; i++ )
 395     {
 396         live_track_t *tk = p_sys->track[i];
 397
 398         if( tk->b_muxed ) stream_DemuxDelete( tk->p_out_muxed );
 399         free( tk->p_buffer );
 400         free( tk );
 401     }
 402
 403     if( p_sys->i_track ) free( p_sys->track );
 404     if( p_sys->p_out_asf ) stream_DemuxDelete( p_sys->p_out_asf );
 405     if( p_sys->rtsp && p_sys->ms ) p_sys->rtsp->teardownMediaSession( *p_sys->ms );
 406     if( p_sys->ms ) Medium::close( p_sys->ms );
 407     if( p_sys->rtsp ) RTSPClient::close( p_sys->rtsp );
 408     if( p_sys->env ) p_sys->env->reclaim();
 409     if( p_sys->p_timeout )
 410     {
 411         vlc_object_kill( p_sys->p_timeout );
 412         vlc_thread_join( p_sys->p_timeout );
 413         vlc_object_detach( p_sys->p_timeout );
 414         vlc_object_destroy( p_sys->p_timeout );
 415     }
 416     if( p_sys->scheduler ) delete p_sys->scheduler;
 417     if( p_sys->p_sdp ) free( p_sys->p_sdp );
 418     if( p_sys->psz_path ) free( p_sys->psz_path );
 419
 420     free( p_sys );
 421 }
 422
 423 /*****************************************************************************
 424  * Connect: connects to the RTSP server to setup the session DESCRIBE
 425  *****************************************************************************/
 426 static int Connect( demux_t *p_demux )
 427 {
 428     demux_sys_t *p_sys = p_demux->p_sys;
 429     Authenticator authenticator;
 430
 431     char *psz_user    = NULL;
 432     char *psz_pwd     = NULL;
 433     char *psz_url     = NULL;
 434     char *psz_options = NULL;
 435     char *p_sdp       = NULL;
 436     int  i_http_port  = 0;
 437     int  i_ret        = VLC_SUCCESS;
 438
 439 createnew:
 440     if( var_CreateGetBool( p_demux, "rtsp-http" ) )
 441         i_http_port = var_CreateGetInteger( p_demux, "rtsp-http-port" );
 442
 443     if( ( p_sys->rtsp = RTSPClient::createNew(*p_sys->env,
 444           p_demux->p_libvlc->i_verbose > 1,
 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                 else if( !strcmp( sub->codecName(), "SPEEX" ) )
 746                 {
 747                     tk->fmt.i_codec = VLC_FOURCC( 's', 'p', 'x', ' ' );
 748                 }
 749             }
 750             else if( !strcmp( sub->mediumName(), "video" ) )
 751             {
 752                 es_format_Init( &tk->fmt, VIDEO_ES, VLC_FOURCC('u','n','d','f') );
 753                 if( !strcmp( sub->codecName(), "MPV" ) )
 754                 {
 755                     tk->fmt.i_codec = VLC_FOURCC( 'm', 'p', 'g', 'v' );
 756                 }
 757                 else if( !strcmp( sub->codecName(), "H263" ) ||
 758                          !strcmp( sub->codecName(), "H263-1998" ) ||
 759                          !strcmp( sub->codecName(), "H263-2000" ) )
 760                 {
 761                     tk->fmt.i_codec = VLC_FOURCC( 'H', '2', '6', '3' );
 762                 }
 763                 else if( !strcmp( sub->codecName(), "H261" ) )
 764                 {
 765                     tk->fmt.i_codec = VLC_FOURCC( 'H', '2', '6', '1' );
 766                 }
 767                 else if( !strcmp( sub->codecName(), "H264" ) )
 768                 {
 769                     unsigned int i_extra = 0;
 770                     uint8_t      *p_extra = NULL;
 771
 772                     tk->fmt.i_codec = VLC_FOURCC( 'h', '2', '6', '4' );
 773                     tk->fmt.b_packetized = VLC_FALSE;
 774
 775                     if((p_extra=parseH264ConfigStr( sub->fmtp_spropparametersets(),
 776                                                     i_extra ) ) )
 777                     {
 778                         tk->fmt.i_extra = i_extra;
 779                         tk->fmt.p_extra = malloc( i_extra );
 780                         memcpy( tk->fmt.p_extra, p_extra, i_extra );
 781
 782                         delete[] p_extra;
 783                     }
 784                 }
 785                 else if( !strcmp( sub->codecName(), "JPEG" ) )
 786                 {
 787                     tk->fmt.i_codec = VLC_FOURCC( 'M', 'J', 'P', 'G' );
 788                 }
 789                 else if( !strcmp( sub->codecName(), "MP4V-ES" ) )
 790                 {
 791                     unsigned int i_extra;
 792                     uint8_t      *p_extra;
 793
 794                     tk->fmt.i_codec = VLC_FOURCC( 'm', 'p', '4', 'v' );
 795
 796                     if( ( p_extra = parseGeneralConfigStr( sub->fmtp_config(),
 797                                                            i_extra ) ) )
 798                     {
 799                         tk->fmt.i_extra = i_extra;
 800                         tk->fmt.p_extra = malloc( i_extra );
 801                         memcpy( tk->fmt.p_extra, p_extra, i_extra );
 802                         delete[] p_extra;
 803                     }
 804                 }
 805                 else if( !strcmp( sub->codecName(), "X-QT" ) ||
 806                          !strcmp( sub->codecName(), "X-QUICKTIME" ) ||
 807                          !strcmp( sub->codecName(), "X-QDM" ) ||
 808                          !strcmp( sub->codecName(), "X-SV3V-ES" )  ||
 809                          !strcmp( sub->codecName(), "X-SORENSONVIDEO" ) )
 810                 {
 811                     tk->b_quicktime = VLC_TRUE;
 812                 }
 813                 else if( !strcmp( sub->codecName(), "MP2T" ) )
 814                 {
 815                     tk->b_muxed = VLC_TRUE;
 816                     tk->p_out_muxed = stream_DemuxNew( p_demux, "ts", p_demux->out );
 817                 }
 818                 else if( !strcmp( sub->codecName(), "MP2P" ) ||
 819                          !strcmp( sub->codecName(), "MP1S" ) )
 820                 {
 821                     tk->b_muxed = VLC_TRUE;
 822                     tk->p_out_muxed = stream_DemuxNew( p_demux, "ps",
 823                                                        p_demux->out );
 824                 }
 825                 else if( !strcmp( sub->codecName(), "X-ASF-PF" ) )
 826                 {
 827                     tk->b_asf = VLC_TRUE;
 828                     if( p_sys->p_out_asf == NULL )
 829                         p_sys->p_out_asf = stream_DemuxNew( p_demux, "asf",
 830                                                             p_demux->out );;
 831                 }
 832             }
 833
 834             if( !tk->b_quicktime && !tk->b_muxed && !tk->b_asf )
 835             {
 836                 tk->p_es = es_out_Add( p_demux->out, &tk->fmt );
 837             }
 838
 839             if( sub->rtcpInstance() != NULL )
 840             {
 841                 sub->rtcpInstance()->setByeHandler( StreamClose, tk );
 842             }
 843
 844             if( tk->p_es || tk->b_quicktime || tk->b_muxed || tk->b_asf )
 845             {
 846                 /* Append */
 847                 p_sys->track = (live_track_t**)realloc( p_sys->track, sizeof( live_track_t ) * ( p_sys->i_track + 1 ) );
 848                 p_sys->track[p_sys->i_track++] = tk;
 849             }
 850             else
 851             {
 852                 /* BUG ??? */
 853                 msg_Err( p_demux, "unusable RTSP track. this should not happen" );
 854                 free( tk );
 855             }
 856         }
 857     }
 858     delete iter;
 859     if( p_sys->i_track <= 0 ) i_return = VLC_EGENERIC;
 860
 861 #if (LIVEMEDIA_LIBRARY_VERSION_INT >= 9999999999)
 862     /* Retrieve the starttime if possible */
 863     p_sys->i_npt_start = (int64_t)( p_sys->ms->playStartTime() * (double)1000000.0 );
 864 #else
 865     p_sys->i_npt_start = (int64_t) -1;
 866 #endif
 867     if( p_sys->i_npt_start < 0 )
 868         p_sys->i_npt_start = -1;
 869
 870 #if (LIVEMEDIA_LIBRARY_VERSION_INT >= 9999999999)
 871     /* Retrieve the duration if possible */
 872     p_sys->i_npt_length = (int64_t)( p_sys->ms->playEndTime() * (double)1000000.0 );
 873 #else
 874     p_sys->i_npt_length = (int64_t) -1;
 875 #endif
 876     if( p_sys->i_npt_length < 0 )
 877         p_sys->i_npt_length = -1;
 878
 879     msg_Dbg( p_demux, "setup start: %lld stop:%lld", p_sys->i_npt_start, p_sys->i_npt_length );
 880     return i_return;
 881 }
 882
 883 /*****************************************************************************
 884  * Play: starts the actual playback of the stream
 885  *****************************************************************************/
 886 static int Play( demux_t *p_demux )
 887 {
 888     demux_sys_t *p_sys = p_demux->p_sys;
 889     int i;
 890
 891     if( p_sys->rtsp )
 892     {
 893         /* The PLAY */
 894         if( !p_sys->rtsp->playMediaSession( *p_sys->ms, p_sys->i_npt_start, -1, 1 ) )
 895         {
 896             msg_Err( p_demux, "RTSP PLAY failed %s", p_sys->env->getResultMsg() );
 897             return VLC_EGENERIC;
 898         }
 899
 900         /* Retrieve the timeout value and set up a timeout prevention thread */
 901         p_sys->i_timeout = p_sys->rtsp->sessionTimeoutParameter();
 902         if( p_sys->i_timeout > 0 && !p_sys->p_timeout )
 903         {
 904             msg_Dbg( p_demux, "We have a timeout of %d seconds",  p_sys->i_timeout );
 905             p_sys->p_timeout = (timeout_thread_t *)vlc_object_create( p_demux, sizeof(timeout_thread_t) );
 906             p_sys->p_timeout->p_sys = p_demux->p_sys; /* lol, object recursion :D */
 907             if( vlc_thread_create( p_sys->p_timeout, "liveMedia-timeout", TimeoutPrevention,
 908                                    VLC_THREAD_PRIORITY_LOW, VLC_TRUE ) )
 909             {
 910                 msg_Err( p_demux, "cannot spawn liveMedia timeout thread" );
 911                 vlc_object_destroy( p_sys->p_timeout );
 912             }
 913             msg_Dbg( p_demux, "spawned timeout thread" );
 914             vlc_object_attach( p_sys->p_timeout, p_demux );
 915         }
 916     }
 917     p_sys->i_pcr = 0;
 918
 919 #if 0
 920     /* TODO */
 921     for( i = 0; i < p_sys->i_track; i++ )
 922     {
 923         //p_sys->track[i]->i_pts = 0;
 924         p_sys->track[i]->i_start_seq = (int)p_sys->track[i]->sub->rtpInfo.seqNum;
 925         msg_Dbg( p_demux, "set startseq: %u", p_sys->track[i]->i_start_seq );
 926     }
 927 #endif
 928
 929 #if (LIVEMEDIA_LIBRARY_VERSION_INT >= 9999999999)
 930     /* Retrieve the starttime if possible */
 931     p_sys->i_npt_start = (int64_t)( p_sys->ms->playStartTime() * (double)1000000.0 );
 932 #else
 933     p_sys->i_npt_start = -1;
 934 #endif
 935     if( p_sys->i_npt_start < 0 )
 936     {
 937         p_sys->i_npt_start = -1;
 938         p_sys->i_npt = 0;
 939     }
 940     else
 941         p_sys->i_npt = p_sys->i_npt_start;
 942
 943 #if (LIVEMEDIA_LIBRARY_VERSION_INT >= 9999999999)
 944     /* Retrieve the duration if possible */
 945     p_sys->i_npt_length = (int64_t)( p_sys->ms->playEndTime() * (double)1000000.0 );
 946 #else
 947     p_sys->i_npt_length = -1;
 948 #endif
 949     if( p_sys->i_npt_length < 0 )
 950         p_sys->i_npt_length = -1;
 951
 952     msg_Dbg( p_demux, "play start: %lld stop:%lld", p_sys->i_npt_start, p_sys->i_npt_length );
 953     return VLC_SUCCESS;
 954 }
 955
 956
 957 /*****************************************************************************
 958  * Demux:
 959  *****************************************************************************/
 960 static int Demux( demux_t *p_demux )
 961 {
 962     demux_sys_t    *p_sys = p_demux->p_sys;
 963     TaskToken      task;
 964
 965     vlc_bool_t      b_send_pcr = VLC_TRUE;
 966     int64_t         i_pcr = 0;
 967     int             i;
 968
 969     /* Check if we need to send the server a Keep-A-Live signal */
 970     if( p_sys->b_timeout_call && p_sys->rtsp && p_sys->ms )
 971     {
 972         char *psz_bye = NULL;
 973         p_sys->rtsp->getMediaSessionParameter( *p_sys->ms, NULL, psz_bye );
 974         p_sys->b_timeout_call = VLC_FALSE;
 975     }
 976
 977
 978     for( i = 0; i < p_sys->i_track; i++ )
 979     {
 980         live_track_t *tk = p_sys->track[i];
 981
 982         if( tk->b_asf || tk->b_muxed )
 983             b_send_pcr = VLC_FALSE;
 984 #if 0
 985         if( i_pcr == 0 )
 986         {
 987             i_pcr = tk->i_pts;
 988         }
 989         else if( tk->i_pts != 0 && i_pcr > tk->i_pts )
 990         {
 991             i_pcr = tk->i_pts ;
 992         }
 993 #endif
 994     }
 995     if( p_sys->i_pcr > 0 )
 996     {
 997         if( b_send_pcr )
 998             es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_sys->i_pcr );
 999     }
1000
1001     /* First warn we want to read data */
1002     p_sys->event = 0;
1003     for( i = 0; i < p_sys->i_track; i++ )
1004     {
1005         live_track_t *tk = p_sys->track[i];
1006
1007         if( tk->waiting == 0 )
1008         {
1009             tk->waiting = 1;
1010             tk->sub->readSource()->getNextFrame( tk->p_buffer, tk->i_buffer,
1011                                           StreamRead, tk, StreamClose, tk );
1012         }
1013     }
1014     /* Create a task that will be called if we wait more than 300ms */
1015     task = p_sys->scheduler->scheduleDelayedTask( 300000, TaskInterrupt, p_demux );
1016
1017     /* Do the read */
1018     p_sys->scheduler->doEventLoop( &p_sys->event );
1019
1020     /* remove the task */
1021     p_sys->scheduler->unscheduleDelayedTask( task );
1022
1023     /* Check for gap in pts value */
1024     for( i = 0; i < p_sys->i_track; i++ )
1025     {
1026         live_track_t *tk = p_sys->track[i];
1027
1028         if( !tk->b_muxed && !tk->b_rtcp_sync &&
1029             tk->sub->rtpSource() && tk->sub->rtpSource()->hasBeenSynchronizedUsingRTCP() )
1030         {
1031             msg_Dbg( p_demux, "tk->rtpSource->hasBeenSynchronizedUsingRTCP()" );
1032
1033             es_out_Control( p_demux->out, ES_OUT_RESET_PCR );
1034             tk->b_rtcp_sync = VLC_TRUE;
1035 #if 0
1036             /* reset PCR */
1037             tk->i_pts = 0;
1038             p_sys->i_pcr = 0;
1039             i_pcr = 0;
1040 #endif
1041         }
1042     }
1043
1044     if( p_sys->b_multicast && p_sys->b_no_data && p_sys->i_no_data_ti > 120 )
1045     {
1046         /* FIXME Make this configurable
1047         msg_Err( p_demux, "no multicast data received in 36s, aborting" );
1048         return 0;
1049         */
1050     }
1051     else if( !p_sys->b_multicast && p_sys->b_no_data && p_sys->i_no_data_ti > 34 )
1052     {
1053         vlc_bool_t b_rtsp_tcp = var_GetBool( p_demux, "rtsp-tcp" );
1054
1055         if( !b_rtsp_tcp && p_sys->rtsp && p_sys->ms )
1056         {
1057             msg_Warn( p_demux, "no data received in 10s. Switching to TCP" );
1058             if( RollOverTcp( p_demux ) )
1059             {
1060                 msg_Err( p_demux, "TCP rollover failed, aborting" );
1061                 return 0;
1062             }
1063         }
1064         else if( p_sys->i_no_data_ti > 34 )
1065         {
1066             msg_Err( p_demux, "no data received in 10s, aborting" );
1067             return 0;
1068         }
1069     }
1070     else if( !p_sys->b_multicast && p_sys->b_no_data && p_sys->i_no_data_ti > 34 )
1071     {
1072         /* EOF ? */
1073         msg_Warn( p_demux, "no data received in 10s, eof ?" );
1074         return 0;
1075     }
1076     return p_demux->b_error ? 0 : 1;
1077 }
1078
1079 /*****************************************************************************
1080  * Control:
1081  *****************************************************************************/
1082 static int Control( demux_t *p_demux, int i_query, va_list args )
1083 {
1084     demux_sys_t *p_sys = p_demux->p_sys;
1085     int64_t *pi64;
1086     double  *pf, f;
1087     vlc_bool_t *pb, b_bool;
1088
1089     switch( i_query )
1090     {
1091         case DEMUX_GET_TIME:
1092             pi64 = (int64_t*)va_arg( args, int64_t * );
1093             if( p_sys->i_npt > 0 )
1094             {
1095                 *pi64 = p_sys->i_npt;
1096                 return VLC_SUCCESS;
1097             }
1098             return VLC_EGENERIC;
1099
1100         case DEMUX_GET_LENGTH:
1101             pi64 = (int64_t*)va_arg( args, int64_t * );
1102             if( p_sys->i_npt_length > 0 )
1103             {
1104                 *pi64 = p_sys->i_npt_length;
1105                 return VLC_SUCCESS;
1106             }
1107             return VLC_EGENERIC;
1108
1109         case DEMUX_GET_POSITION:
1110             pf = (double*)va_arg( args, double* );
1111             if( p_sys->i_npt_length > 0 && p_sys->i_npt > 0 )
1112             {
1113                 *pf = (double)p_sys->i_npt / (double)p_sys->i_npt_length;
1114                 return VLC_SUCCESS;
1115             }
1116             return VLC_EGENERIC;
1117
1118         case DEMUX_SET_POSITION:
1119         {
1120             float time;
1121
1122             f = (double)va_arg( args, double );
1123             if( p_sys->rtsp && p_sys->i_npt_length > 0 )
1124             {
1125                 int i;
1126                 time = f * (double)p_sys->i_npt_length / 1000000.0;   /* in second */
1127                 if( !p_sys->rtsp->playMediaSession( *p_sys->ms, time, -1, 1 ) )
1128                 {
1129                     msg_Err( p_demux, "PLAY failed %s",
1130                         p_sys->env->getResultMsg() );
1131                     return VLC_EGENERIC;
1132                 }
1133                 es_out_Control( p_demux->out, ES_OUT_RESET_PCR );
1134                 p_sys->i_pcr = 0;
1135 #if 0
1136                 /* Retrieve RTP-Info values */
1137                 for( i = 0; i < p_sys->i_track; i++ )
1138                 {
1139                     //p_sys->track[i]->i_pts = 0;
1140                     p_sys->track[i]->i_start_seq = p_sys->track[i]->sub->rtpInfo.seqNum;
1141                     msg_Dbg( p_demux, "set pos startseq: %u", p_sys->track[i]->i_start_seq );
1142                 }
1143 #endif
1144 #if (LIVEMEDIA_LIBRARY_VERSION_INT >= 9999999999)
1145                 /* Retrieve the starttime if possible */
1146                 p_sys->i_npt_start = (int64_t)( p_sys->ms->playStartTime() * (double)1000000.0 );
1147 #else
1148                 p_sys->i_npt_start = -1;
1149 #endif
1150                 if( p_sys->i_npt_start < 0 )
1151                 {
1152                     p_sys->i_npt_start = -1;
1153                     p_sys->i_npt = 0;
1154                 }
1155                 else
1156                     p_sys->i_npt = p_sys->i_npt_start;
1157
1158 #if (LIVEMEDIA_LIBRARY_VERSION_INT >= 9999999999)
1159                 /* Retrieve the duration if possible */
1160                 p_sys->i_npt_length = (int64_t)( p_sys->ms->playEndTime() * (double)1000000.0 );
1161 #else
1162                 p_sys->i_npt_length = -1;
1163 #endif
1164                 if( p_sys->i_npt_length < 0 )
1165                     p_sys->i_npt_length = -1;
1166
1167                 msg_Dbg( p_demux, "seek start: %lld stop:%lld", p_sys->i_npt_start, p_sys->i_npt_length );
1168                 return VLC_SUCCESS;
1169             }
1170             return VLC_EGENERIC;
1171         }
1172         /* Special for access_demux */
1173         case DEMUX_CAN_PAUSE:
1174             pb = (vlc_bool_t*)va_arg( args, vlc_bool_t * );
1175             if( p_sys->rtsp && p_sys->i_npt_length )
1176                 /* Not always true, but will be handled in SET_PAUSE_STATE */
1177                 *pb = VLC_TRUE;
1178             else
1179                 *pb = VLC_FALSE;
1180             return VLC_SUCCESS;
1181
1182         case DEMUX_CAN_CONTROL_PACE:
1183             pb = (vlc_bool_t*)va_arg( args, vlc_bool_t * );
1184
1185 #if 1       /* Disable for now until we have a clock synchro algo
1186              * which works with something else than MPEG over UDP */
1187             *pb = VLC_FALSE;
1188 #else
1189             *pb = VLC_TRUE;
1190 #endif
1191             return VLC_SUCCESS;
1192
1193         case DEMUX_SET_PAUSE_STATE:
1194         {
1195             double d_npt = (double) p_sys->i_npt / I64C(1000000);
1196             int i;
1197
1198             b_bool = (vlc_bool_t)va_arg( args, vlc_bool_t );
1199             if( p_sys->rtsp == NULL )
1200                 return VLC_EGENERIC;
1201
1202             /* FIXME */
1203             if( ( b_bool && !p_sys->rtsp->pauseMediaSession( *p_sys->ms ) ) ||
1204                     ( !b_bool && !p_sys->rtsp->playMediaSession( *p_sys->ms,
1205                       d_npt > 0 ? d_npt : -1 ) ) )
1206             {
1207                     msg_Err( p_demux, "PLAY or PAUSE failed %s", p_sys->env->getResultMsg() );
1208                     return VLC_EGENERIC;
1209             }
1210             es_out_Control( p_demux->out, ES_OUT_RESET_PCR );
1211             p_sys->i_pcr = 0;
1212 #if 0
1213             for( i = 0; i < p_sys->i_track; i++ )
1214             {
1215                 //p_sys->track[i]->i_pts = 0;
1216                 p_sys->track[i]->i_start_seq = p_sys->track[i]->sub->rtpInfo.seqNum;
1217                 msg_Dbg( p_demux, "set pause startseq: %u", p_sys->track[i]->i_start_seq );
1218             }
1219 #endif
1220 #if (LIVEMEDIA_LIBRARY_VERSION_INT >= 9999999999)
1221             /* Retrieve the starttime if possible */
1222             p_sys->i_npt_start = (int64_t)( p_sys->ms->playStartTime() * (double)1000000.0 );
1223 #else
1224             p_sys->i_npt_start = -1;
1225 #endif
1226             if( p_sys->i_npt_start < 0 )
1227             {
1228                 p_sys->i_npt_start = -1;
1229                 p_sys->i_npt = 0;
1230             }
1231             else
1232                 p_sys->i_npt = p_sys->i_npt_start;
1233
1234 #if (LIVEMEDIA_LIBRARY_VERSION_INT >= 9999999999)
1235             /* Retrieve the duration if possible */
1236             p_sys->i_npt_length = (int64_t)( p_sys->ms->playEndTime() * (double)1000000.0 );
1237 #else
1238             p_sys->i_npt_length = -1;
1239 #endif
1240             if( p_sys->i_npt_length < 0 )
1241                 p_sys->i_npt_length = -1;
1242
1243             msg_Dbg( p_demux, "pause start: %lld stop:%lld", p_sys->i_npt_start, p_sys->i_npt_length );
1244             return VLC_SUCCESS;
1245         }
1246         case DEMUX_GET_TITLE_INFO:
1247         case DEMUX_SET_TITLE:
1248         case DEMUX_SET_SEEKPOINT:
1249             return VLC_EGENERIC;
1250
1251         case DEMUX_GET_PTS_DELAY:
1252             pi64 = (int64_t*)va_arg( args, int64_t * );
1253             *pi64 = (int64_t)var_GetInteger( p_demux, "rtsp-caching" ) * 1000;
1254             return VLC_SUCCESS;
1255
1256         default:
1257             return VLC_EGENERIC;
1258     }
1259 }
1260
1261 /*****************************************************************************
1262  * RollOverTcp: reopen the rtsp into TCP mode
1263  * XXX: ugly, a lot of code are duplicated from Open()
1264  * This should REALLY be fixed
1265  *****************************************************************************/
1266 static int RollOverTcp( demux_t *p_demux )
1267 {
1268     demux_sys_t *p_sys = p_demux->p_sys;
1269     int i, i_return;
1270
1271     var_SetBool( p_demux, "rtsp-tcp", VLC_TRUE );
1272
1273     /* We close the old RTSP session */
1274     for( i = 0; i < p_sys->i_track; i++ )
1275     {
1276         live_track_t *tk = p_sys->track[i];
1277
1278         if( tk->b_muxed ) stream_DemuxDelete( tk->p_out_muxed );
1279         free( tk->p_buffer );
1280         free( tk );
1281     }
1282     if( p_sys->i_track ) free( p_sys->track );
1283     if( p_sys->p_out_asf ) stream_DemuxDelete( p_sys->p_out_asf );
1284
1285     p_sys->rtsp->teardownMediaSession( *p_sys->ms );
1286     Medium::close( p_sys->ms );
1287     RTSPClient::close( p_sys->rtsp );
1288
1289     p_sys->ms = NULL;
1290     p_sys->rtsp = NULL;
1291     p_sys->track = NULL;
1292     p_sys->i_track = 0;
1293
1294     /* Reopen rtsp client */
1295     if( p_demux->s != NULL && ( i_return = Connect( p_demux ) ) != VLC_SUCCESS )
1296     {
1297         msg_Err( p_demux, "Failed to connect with rtsp://%s", p_sys->psz_path );
1298         goto error;
1299     }
1300
1301     if( p_sys->p_sdp == NULL )
1302     {
1303         msg_Err( p_demux, "Failed to retrieve the RTSP Session Description" );
1304         goto error;
1305     }
1306
1307     if( ( i_return = SessionsSetup( p_demux ) ) != VLC_SUCCESS )
1308     {
1309         msg_Err( p_demux, "Nothing to play for rtsp://%s", p_sys->psz_path );
1310         goto error;
1311     }
1312
1313     if( ( i_return = Play( p_demux ) ) != VLC_SUCCESS )
1314         goto error;
1315
1316     return VLC_SUCCESS;
1317
1318 error:
1319     return VLC_EGENERIC;
1320 }
1321
1322
1323 /*****************************************************************************
1324  *
1325  *****************************************************************************/
1326 static void StreamRead( void *p_private, unsigned int i_size,
1327                         unsigned int i_truncated_bytes, struct timeval pts,
1328                         unsigned int duration )
1329 {
1330     live_track_t   *tk = (live_track_t*)p_private;
1331     demux_t        *p_demux = tk->p_demux;
1332     demux_sys_t    *p_sys = p_demux->p_sys;
1333     block_t        *p_block;
1334
1335     //msg_Dbg( p_demux, "pts: %d", pts.tv_sec );
1336
1337     int64_t i_pts = (uint64_t)pts.tv_sec * UI64C(1000000) +
1338         (uint64_t)pts.tv_usec;
1339
1340     /* XXX Beurk beurk beurk Avoid having negative value XXX */
1341     i_pts &= UI64C(0x00ffffffffffffff);
1342
1343     if( tk->b_quicktime && tk->p_es == NULL )
1344     {
1345         QuickTimeGenericRTPSource *qtRTPSource =
1346             (QuickTimeGenericRTPSource*)tk->sub->rtpSource();
1347         QuickTimeGenericRTPSource::QTState &qtState = qtRTPSource->qtState;
1348         uint8_t *sdAtom = (uint8_t*)&qtState.sdAtom[4];
1349
1350         if( tk->fmt.i_cat == VIDEO_ES ) {
1351             if( qtState.sdAtomSize < 16 + 32 )
1352             {
1353                 /* invalid */
1354                 p_sys->event = 0xff;
1355                 tk->waiting = 0;
1356                 return;
1357             }
1358             tk->fmt.i_codec = VLC_FOURCC(sdAtom[0],sdAtom[1],sdAtom[2],sdAtom[3]);
1359             tk->fmt.video.i_width  = (sdAtom[28] << 8) | sdAtom[29];
1360             tk->fmt.video.i_height = (sdAtom[30] << 8) | sdAtom[31];
1361
1362             if( tk->fmt.i_codec == VLC_FOURCC('a', 'v', 'c', '1') )
1363             {
1364                 uint8_t *pos = (uint8_t*)qtRTPSource->qtState.sdAtom + 86;
1365                 uint8_t *endpos = (uint8_t*)qtRTPSource->qtState.sdAtom
1366                                   + qtRTPSource->qtState.sdAtomSize;
1367                 while (pos+8 < endpos) {
1368                     unsigned atomLength = pos[0]<<24 | pos[1]<<16 | pos[2]<<8 | pos[3];
1369                     if( atomLength == 0 || atomLength > endpos-pos) break;
1370                     if( memcmp(pos+4, "avcC", 4) == 0 &&
1371                         atomLength > 8 &&
1372                         atomLength <= INT_MAX )
1373                     {
1374                         tk->fmt.i_extra = atomLength-8;
1375                         tk->fmt.p_extra = malloc( tk->fmt.i_extra );
1376                         memcpy(tk->fmt.p_extra, pos+8, atomLength-8);
1377                         break;
1378                     }
1379                     pos += atomLength;
1380                 }
1381             }
1382             else
1383             {
1384                 tk->fmt.i_extra        = qtState.sdAtomSize - 16;
1385                 tk->fmt.p_extra        = malloc( tk->fmt.i_extra );
1386                 memcpy( tk->fmt.p_extra, &sdAtom[12], tk->fmt.i_extra );
1387             }
1388         }
1389         else {
1390             if( qtState.sdAtomSize < 4 )
1391             {
1392                 /* invalid */
1393                 p_sys->event = 0xff;
1394                 tk->waiting = 0;
1395                 return;
1396             }
1397             tk->fmt.i_codec = VLC_FOURCC(sdAtom[0],sdAtom[1],sdAtom[2],sdAtom[3]);
1398         }
1399         tk->p_es = es_out_Add( p_demux->out, &tk->fmt );
1400     }
1401
1402 #if 0
1403     fprintf( stderr, "StreamRead size=%d pts=%lld\n",
1404              i_size,
1405              pts.tv_sec * 1000000LL + pts.tv_usec );
1406 #endif
1407
1408     /* grow buffer if it looks like buffer is too small, but don't eat
1409      * up all the memory on strange streams */
1410     if( i_truncated_bytes > 0 && tk->i_buffer < 2000000 )
1411     {
1412         void *p_tmp;
1413         msg_Dbg( p_demux, "lost %d bytes", i_truncated_bytes );
1414         msg_Dbg( p_demux, "increasing buffer size to %d", tk->i_buffer * 2 );
1415         tk->i_buffer *= 2;
1416         p_tmp = realloc( tk->p_buffer, tk->i_buffer );
1417         if( p_tmp == NULL )
1418         {
1419             msg_Warn( p_demux, "realloc failed" );
1420         }
1421         else
1422         {
1423             tk->p_buffer = (uint8_t*)p_tmp;
1424         }
1425     }
1426     if( i_size > tk->i_buffer )
1427     {
1428         msg_Warn( p_demux, "buffer overflow" );
1429     }
1430     /* FIXME could i_size be > buffer size ? */
1431     if( tk->fmt.i_codec == VLC_FOURCC('s','a','m','r') ||
1432         tk->fmt.i_codec == VLC_FOURCC('s','a','w','b') )
1433     {
1434         AMRAudioSource *amrSource = (AMRAudioSource*)tk->sub->readSource();
1435
1436         p_block = block_New( p_demux, i_size + 1 );
1437         p_block->p_buffer[0] = amrSource->lastFrameHeader();
1438         memcpy( p_block->p_buffer + 1, tk->p_buffer, i_size );
1439     }
1440     else if( tk->fmt.i_codec == VLC_FOURCC('H','2','6','1') )
1441     {
1442 #if LIVEMEDIA_LIBRARY_VERSION_INT >= 1081468800
1443         H261VideoRTPSource *h261Source = (H261VideoRTPSource*)tk->sub->rtpSource();
1444         uint32_t header = h261Source->lastSpecialHeader();
1445 #else
1446         uint32_t header = 0;
1447         msg_Warn( p_demux, "need livemedia library >= \"2004.04.09\"" );
1448 #endif
1449         p_block = block_New( p_demux, i_size + 4 );
1450         memcpy( p_block->p_buffer, &header, 4 );
1451         memcpy( p_block->p_buffer + 4, tk->p_buffer, i_size );
1452
1453         if( tk->sub->rtpSource()->curPacketMarkerBit() )
1454             p_block->i_flags |= BLOCK_FLAG_END_OF_FRAME;
1455     }
1456     else if( tk->fmt.i_codec == VLC_FOURCC('h','2','6','4') )
1457     {
1458         if( (tk->p_buffer[0] & 0x1f) >= 24 )
1459             msg_Warn( p_demux, "unsupported NAL type for H264" );
1460
1461         /* Normal NAL type */
1462         p_block = block_New( p_demux, i_size + 4 );
1463         p_block->p_buffer[0] = 0x00;
1464         p_block->p_buffer[1] = 0x00;
1465         p_block->p_buffer[2] = 0x00;
1466         p_block->p_buffer[3] = 0x01;
1467         memcpy( &p_block->p_buffer[4], tk->p_buffer, i_size );
1468     }
1469     else if( tk->b_asf )
1470     {
1471         int i_copy = __MIN( p_sys->asfh.i_min_data_packet_size, (int)i_size );
1472         p_block = block_New( p_demux, p_sys->asfh.i_min_data_packet_size );
1473
1474         memcpy( p_block->p_buffer, tk->p_buffer, i_copy );
1475     }
1476     else
1477     {
1478         p_block = block_New( p_demux, i_size );
1479         memcpy( p_block->p_buffer, tk->p_buffer, i_size );
1480     }
1481
1482     /* Update NPT */
1483     //msg_Dbg( p_demux, "current %d, start_seq %u", (int)tk->sub->rtpSource()->curPacketRTPSeqNum(), tk->i_start_seq );
1484     if( (tk->fmt.i_cat == VIDEO_ES) && (p_sys->i_pcr < i_pts) &&
1485         (i_pts > 0) && (p_sys->i_pcr > 0) )
1486     {
1487         p_sys->i_npt += __MAX( 0, i_pts - p_sys->i_pcr );
1488         p_sys->i_pcr = i_pts;
1489         //msg_Dbg( p_demux, "npt update" );
1490     }
1491     else if( /*tk->fmt.i_cat == VIDEO_ES &&*/ p_sys->i_pcr < i_pts )
1492     {
1493         p_sys->i_pcr = i_pts;
1494     }
1495     //msg_Dbg( p_demux, "npt %lld", p_sys->i_npt );
1496
1497     if( (i_pts != tk->i_pts) && (!tk->b_muxed) )
1498     {
1499         p_block->i_dts = ( tk->fmt.i_cat == VIDEO_ES ) ? 0 : i_pts;
1500         p_block->i_pts = i_pts;
1501     }
1502
1503     if( tk->b_muxed )
1504     {
1505         stream_DemuxSend( tk->p_out_muxed, p_block );
1506     }
1507     else if( tk->b_asf )
1508     {
1509         stream_DemuxSend( p_sys->p_out_asf, p_block );
1510     }
1511     else
1512     {
1513         es_out_Send( p_demux->out, tk->p_es, p_block );
1514     }
1515
1516     /* warn that's ok */
1517     p_sys->event = 0xff;
1518
1519     /* we have read data */
1520     tk->waiting = 0;
1521     p_demux->p_sys->b_no_data = VLC_FALSE;
1522     p_demux->p_sys->i_no_data_ti = 0;
1523
1524     if( i_pts > 0 && !tk->b_muxed )
1525     {
1526         tk->i_pts = i_pts;
1527     }
1528 }
1529
1530 /*****************************************************************************
1531  *
1532  *****************************************************************************/
1533 static void StreamClose( void *p_private )
1534 {
1535     live_track_t   *tk = (live_track_t*)p_private;
1536     demux_t        *p_demux = tk->p_demux;
1537     demux_sys_t    *p_sys = p_demux->p_sys;
1538
1539     msg_Dbg( p_demux, "StreamClose" );
1540
1541     p_sys->event = 0xff;
1542     p_demux->b_error = VLC_TRUE;
1543 }
1544
1545
1546 /*****************************************************************************
1547  *
1548  *****************************************************************************/
1549 static void TaskInterrupt( void *p_private )
1550 {
1551     demux_t *p_demux = (demux_t*)p_private;
1552
1553     p_demux->p_sys->i_no_data_ti++;
1554
1555     /* Avoid lock */
1556     p_demux->p_sys->event = 0xff;
1557 }
1558
1559 /*****************************************************************************
1560  *
1561  *****************************************************************************/
1562 static void TimeoutPrevention( timeout_thread_t *p_timeout )
1563 {
1564     p_timeout->b_die = VLC_FALSE;
1565     p_timeout->i_remain = (int64_t)p_timeout->p_sys->i_timeout -2;
1566     p_timeout->i_remain *= 1000000;
1567
1568     vlc_thread_ready( p_timeout );
1569
1570     /* Avoid lock */
1571     while( !p_timeout->b_die )
1572     {
1573         if( p_timeout->i_remain <= 0 )
1574         {
1575             p_timeout->i_remain = (int64_t)p_timeout->p_sys->i_timeout -2;
1576             p_timeout->i_remain *= 1000000;
1577             p_timeout->p_sys->b_timeout_call = VLC_TRUE;
1578             msg_Dbg( p_timeout, "reset the timeout timer" );
1579         }
1580         p_timeout->i_remain -= 200000;
1581         msleep( 200000 ); /* 200 ms */
1582     }
1583 }
1584
1585 /*****************************************************************************
1586  *
1587  *****************************************************************************/
1588 static int b64_decode( char *dest, char *src );
1589
1590 static int ParseASF( demux_t *p_demux )
1591 {
1592     demux_sys_t    *p_sys = p_demux->p_sys;
1593
1594     const char *psz_marker = "a=pgmpu:data:application/vnd.ms.wms-hdr.asfv1;base64,";
1595     char *psz_asf = strcasestr( p_sys->p_sdp, psz_marker );
1596     char *psz_end;
1597     block_t *p_header;
1598
1599     /* Parse the asf header */
1600     if( psz_asf == NULL )
1601         return VLC_EGENERIC;
1602
1603     psz_asf += strlen( psz_marker );
1604     psz_asf = strdup( psz_asf );    /* Duplicate it */
1605     psz_end = strchr( psz_asf, '\n' );
1606
1607     while( psz_end > psz_asf && ( *psz_end == '\n' || *psz_end == '\r' ) )
1608         *psz_end-- = '\0';
1609
1610     if( psz_asf >= psz_end )
1611     {
1612         free( psz_asf );
1613         return VLC_EGENERIC;
1614     }
1615
1616     /* Always smaller */
1617     p_header = block_New( p_demux, psz_end - psz_asf );
1618     p_header->i_buffer = b64_decode( (char*)p_header->p_buffer, psz_asf );
1619     //msg_Dbg( p_demux, "Size=%d Hdrb64=%s", p_header->i_buffer, psz_asf );
1620     if( p_header->i_buffer <= 0 )
1621     {
1622         free( psz_asf );
1623         return VLC_EGENERIC;
1624     }
1625
1626     /* Parse it to get packet size */
1627     E_(asf_HeaderParse)( &p_sys->asfh, p_header->p_buffer, p_header->i_buffer );
1628
1629     /* Send it to demuxer */
1630     stream_DemuxSend( p_sys->p_out_asf, p_header );
1631
1632     free( psz_asf );
1633     return VLC_SUCCESS;
1634 }
1635
1636
1637 static unsigned char* parseH264ConfigStr( char const* configStr,
1638                                           unsigned int& configSize )
1639 {
1640     char *dup, *psz;
1641     int i, i_records = 1;
1642
1643     if( configSize )
1644     configSize = 0;
1645
1646     if( configStr == NULL || *configStr == '\0' )
1647         return NULL;
1648
1649     psz = dup = strdup( configStr );
1650
1651     /* Count the number of comma's */
1652     for( psz = dup; *psz != '\0'; ++psz )
1653     {
1654         if( *psz == ',')
1655         {
1656             ++i_records;
1657             *psz = '\0';
1658         }
1659     }
1660
1661     unsigned char *cfg = new unsigned char[5 * strlen(dup)];
1662     psz = dup;
1663     for( i = 0; i < i_records; i++ )
1664     {
1665         cfg[configSize++] = 0x00;
1666         cfg[configSize++] = 0x00;
1667         cfg[configSize++] = 0x00;
1668         cfg[configSize++] = 0x01;
1669
1670         configSize += b64_decode( (char*)&cfg[configSize], psz );
1671         psz += strlen(psz)+1;
1672     }
1673
1674     if( dup ) free( dup );
1675     return cfg;
1676 }
1677
1678 /*char b64[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";*/
1679 static int b64_decode( char *dest, char *src )
1680 {
1681     const char *dest_start = dest;
1682     int  i_level;
1683     int  last = 0;
1684     int  b64[256] = {
1685         -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,  /* 00-0F */
1686         -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,  /* 10-1F */
1687         -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,62,-1,-1,-1,63,  /* 20-2F */
1688         52,53,54,55,56,57,58,59,60,61,-1,-1,-1,-1,-1,-1,  /* 30-3F */
1689         -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,10,11,12,13,14,  /* 40-4F */
1690         15,16,17,18,19,20,21,22,23,24,25,-1,-1,-1,-1,-1,  /* 50-5F */
1691         -1,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,  /* 60-6F */
1692         41,42,43,44,45,46,47,48,49,50,51,-1,-1,-1,-1,-1,  /* 70-7F */
1693         -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,  /* 80-8F */
1694         -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,  /* 90-9F */
1695         -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,  /* A0-AF */
1696         -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,  /* B0-BF */
1697         -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,  /* C0-CF */
1698         -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,  /* D0-DF */
1699         -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,  /* E0-EF */
1700         -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1   /* F0-FF */
1701         };
1702
1703     for( i_level = 0; *src != '\0'; src++ )
1704     {
1705         int  c;
1706
1707         c = b64[(unsigned int)*src];
1708         if( c == -1 )
1709         {
1710             continue;
1711         }
1712
1713         switch( i_level )
1714         {
1715             case 0:
1716                 i_level++;
1717                 break;
1718             case 1:
1719                 *dest++ = ( last << 2 ) | ( ( c >> 4)&0x03 );
1720                 i_level++;
1721                 break;
1722             case 2:
1723                 *dest++ = ( ( last << 4 )&0xf0 ) | ( ( c >> 2 )&0x0f );
1724                 i_level++;
1725                 break;
1726             case 3:
1727                 *dest++ = ( ( last &0x03 ) << 6 ) | c;
1728                 i_level = 0;
1729         }
1730         last = c;
1731     }
1732
1733     *dest = '\0';
1734
1735     return dest - dest_start;
1736 }