git.sesse.net Git - vlc/blob - modules/demux/livedotcom.cpp

   1 /*****************************************************************************
   2  * live.cpp : live.com support.
   3  *****************************************************************************
   4  * Copyright (C) 2003-2004 VideoLAN
   5  * $Id$
   6  *
   7  * Authors: Laurent Aimar <fenrir@via.ecp.fr>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
  22  *****************************************************************************/
  23
  24 /*****************************************************************************
  25  * Preamble
  26  *****************************************************************************/
  27 #include <stdlib.h>                                      /* malloc(), free() */
  28
  29 #include <vlc/vlc.h>
  30 #include <vlc/input.h>
  31
  32 #include <iostream>
  33
  34 #if defined( WIN32 )
  35 #   include <winsock2.h>
  36 #endif
  37
  38 #include "BasicUsageEnvironment.hh"
  39 #include "GroupsockHelper.hh"
  40 #include "liveMedia.hh"
  41
  42 extern "C" {
  43 #include "../access/mms/asf.h"  /* Who said ugly ? */
  44 }
  45
  46 #if (LIVEMEDIA_LIBRARY_VERSION_INT < 1089936000)
  47 #define RECLAIM_ENV(env) delete (env)
  48 #else
  49 #define RECLAIM_ENV(env) (env)->reclaim()
  50 #endif
  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 server speak 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 talk to normal RTSP servers." )
  69
  70 vlc_module_begin();
  71     set_description( _("live.com (RTSP/RTP/SDP) demuxer" ) );
  72     set_capability( "demux2", 50 );
  73     set_shortname( "Live.com RTP/RTSP");
  74     set_callbacks( Open, Close );
  75     add_shortcut( "live" );
  76     set_category( CAT_INPUT );
  77     set_subcategory( SUBCAT_INPUT_DEMUX );
  78
  79     add_submodule();
  80         set_description( _("RTSP/RTP access and demux") );
  81         add_shortcut( "rtsp" );
  82         add_shortcut( "sdp" );
  83         set_capability( "access_demux", 0 );
  84         set_callbacks( Open, Close );
  85         add_bool( "rtsp-tcp", 0, NULL,
  86                   N_("Use RTP over RTSP (TCP)"),
  87                   N_("Use RTP over RTSP (TCP)"), VLC_TRUE );
  88         add_integer( "rtsp-caching", 4 * DEFAULT_PTS_DELAY / 1000, NULL,
  89             CACHING_TEXT, CACHING_LONGTEXT, VLC_TRUE );
  90         add_bool( "rtsp-kasenna", VLC_FALSE, NULL, KASENNA_TEXT,
  91                   KASENNA_LONGTEXT, VLC_TRUE );
  92 vlc_module_end();
  93
  94 /* TODO:
  95  *  - Improve support of PS/TS
  96  *  - Support X-QT/X-QUICKTIME generic codec for audio.
  97  *
  98  *  - Check memory leak, delete/free -> still one when using rtsp-tcp but I'm
  99  *  not sure if it comes from me.
 100  *
 101  */
 102
 103 /*****************************************************************************
 104  * Local prototypes
 105  *****************************************************************************/
 106 typedef struct
 107 {
 108     demux_t     *p_demux;
 109
 110     vlc_bool_t   b_quicktime;
 111     vlc_bool_t   b_muxed;
 112     vlc_bool_t   b_asf;
 113
 114     es_format_t  fmt;
 115     es_out_id_t  *p_es;
 116
 117     stream_t     *p_out_muxed;    /* for muxed stream */
 118
 119     RTPSource    *rtpSource;
 120     FramedSource *readSource;
 121     vlc_bool_t   b_rtcp_sync;
 122
 123     uint8_t      *p_buffer;
 124     unsigned int  i_buffer;
 125
 126     char         waiting;
 127
 128     mtime_t      i_pts;
 129
 130 } live_track_t;
 131
 132 struct demux_sys_t
 133 {
 134     char         *p_sdp;    /* XXX mallocated */
 135
 136     MediaSession     *ms;
 137     TaskScheduler    *scheduler;
 138     UsageEnvironment *env ;
 139     RTSPClient       *rtsp;
 140
 141     /* */
 142     int              i_track;
 143     live_track_t     **track;   /* XXX mallocated */
 144     mtime_t          i_pcr;
 145     mtime_t          i_pcr_start;
 146
 147     /* Asf */
 148     asf_header_t     asfh;
 149     stream_t         *p_out_asf;
 150
 151     /* */
 152     mtime_t          i_length;
 153     mtime_t          i_start;
 154
 155     /* */
 156     vlc_bool_t       b_no_data;     /* true if we never receive any data */
 157     int              i_no_data_ti;  /* consecutive number of TaskInterrupt */
 158
 159     char             event;
 160 };
 161
 162 static int Demux  ( demux_t * );
 163 static int Control( demux_t *, int, va_list );
 164
 165 static int ParseASF( demux_t * );
 166
 167 static int RollOverTcp( demux_t * );
 168
 169 static void StreamRead( void *, unsigned int, unsigned int,
 170                         struct timeval, unsigned int );
 171 static void StreamClose( void * );
 172 static void TaskInterrupt( void * );
 173
 174 /*****************************************************************************
 175  * DemuxOpen:
 176  *****************************************************************************/
 177 static int  Open ( vlc_object_t *p_this )
 178 {
 179     demux_t     *p_demux = (demux_t*)p_this;
 180     demux_sys_t *p_sys;
 181
 182     MediaSubsessionIterator *iter;
 183     MediaSubsession *sub;
 184
 185     vlc_bool_t b_rtsp_tcp;
 186     uint8_t *p_peek;
 187
 188     int     i_sdp;
 189     int     i_sdp_max;
 190     uint8_t *p_sdp;
 191
 192     if( p_demux->s )
 193     {
 194         /* See if it looks like a SDP
 195            v, o, s fields are mandatory and in this order */
 196         if( stream_Peek( p_demux->s, &p_peek, 7 ) < 7 ) return VLC_EGENERIC;
 197
 198         if( strncmp( (char*)p_peek, "v=0\r\n", 5 ) &&
 199             strncmp( (char*)p_peek, "v=0\n", 4 ) &&
 200             ( p_peek[0] < 'a' || p_peek[0] > 'z' || p_peek[1] != '=' ) )
 201         {
 202             return VLC_EGENERIC;
 203         }
 204     }
 205     else
 206     {
 207         var_Create( p_demux, "rtsp-caching", VLC_VAR_INTEGER|VLC_VAR_DOINHERIT );
 208     }
 209
 210     p_demux->pf_demux  = Demux;
 211     p_demux->pf_control= Control;
 212     p_demux->p_sys     = p_sys = (demux_sys_t*)malloc( sizeof( demux_sys_t ) );
 213     p_sys->p_sdp = NULL;
 214     p_sys->scheduler = NULL;
 215     p_sys->env = NULL;
 216     p_sys->ms = NULL;
 217     p_sys->rtsp = NULL;
 218     p_sys->i_track = 0;
 219     p_sys->track   = NULL;
 220     p_sys->i_pcr   = 0;
 221     p_sys->i_pcr_start = 0;
 222     p_sys->i_length = 0;
 223     p_sys->i_start = 0;
 224     p_sys->p_out_asf = NULL;
 225     p_sys->b_no_data = VLC_TRUE;
 226     p_sys->i_no_data_ti = 0;
 227
 228
 229     if( ( p_sys->scheduler = BasicTaskScheduler::createNew() ) == NULL )
 230     {
 231         msg_Err( p_demux, "BasicTaskScheduler::createNew failed" );
 232         goto error;
 233     }
 234     if( !( p_sys->env = BasicUsageEnvironment::createNew(*p_sys->scheduler) ) )
 235     {
 236         msg_Err( p_demux, "BasicUsageEnvironment::createNew failed" );
 237         goto error;
 238     }
 239
 240     if( p_demux->s == NULL && !strcasecmp( p_demux->psz_access, "rtsp" ) )
 241     {
 242         char *psz_url;
 243         char *psz_options;
 244
 245         if( ( p_sys->rtsp = RTSPClient::createNew(*p_sys->env, 1/*verbose*/,
 246               "VLC Media Player" ) ) == NULL )
 247         {
 248             msg_Err( p_demux, "RTSPClient::createNew failed (%s)",
 249                      p_sys->env->getResultMsg() );
 250             goto error;
 251         }
 252         psz_url = (char*)malloc( strlen( p_demux->psz_path ) + 8 );
 253         sprintf( psz_url, "rtsp://%s", p_demux->psz_path );
 254
 255         psz_options = p_sys->rtsp->sendOptionsCmd( psz_url );
 256         if( psz_options )
 257             delete [] psz_options;
 258
 259         p_sdp = (uint8_t*)p_sys->rtsp->describeURL( psz_url,
 260                               NULL, var_CreateGetBool( p_demux, "rtsp-kasenna" ) );
 261         if( p_sdp == NULL )
 262         {
 263             msg_Err( p_demux, "describeURL failed (%s)",
 264                      p_sys->env->getResultMsg() );
 265             free( psz_url );
 266             goto error;
 267         }
 268         free( psz_url );
 269
 270         /* malloc-ated copy */
 271         p_sys->p_sdp = strdup( (char*)p_sdp );
 272         delete[] p_sdp;
 273         fprintf( stderr, "sdp=%s\n", p_sys->p_sdp );
 274     }
 275     else if( p_demux->s == NULL && !strcasecmp( p_demux->psz_access, "sdp" ) )
 276     {
 277         p_sys->p_sdp = strdup( p_demux->psz_path );
 278     }
 279     else
 280     {
 281         /* Gather the complete sdp file */
 282         i_sdp = 0;
 283         i_sdp_max = 1000;
 284         p_sdp = (uint8_t*)malloc( i_sdp_max );
 285         for( ;; )
 286         {
 287             int i_read = stream_Read( p_demux->s, &p_sdp[i_sdp],
 288                                       i_sdp_max - i_sdp - 1 );
 289
 290             if( i_read < 0 )
 291             {
 292                 msg_Err( p_demux, "failed to read SDP" );
 293                 free( p_sys );
 294                 return VLC_EGENERIC;
 295             }
 296
 297             i_sdp += i_read;
 298
 299             if( i_read < i_sdp_max - i_sdp - 1 )
 300             {
 301                 p_sdp[i_sdp] = '\0';
 302                 break;
 303             }
 304
 305             i_sdp_max += 1000;
 306             p_sdp = (uint8_t*)realloc( p_sdp, i_sdp_max );
 307         }
 308         p_sys->p_sdp = (char*)p_sdp;
 309
 310         msg_Dbg( p_demux, "sdp=%s\n", p_sys->p_sdp );
 311     }
 312     if( !( p_sys->ms = MediaSession::createNew( *p_sys->env, p_sys->p_sdp ) ) )
 313     {
 314         msg_Err( p_demux, "MediaSession::createNew failed" );
 315         goto error;
 316     }
 317
 318     b_rtsp_tcp = var_CreateGetBool( p_demux, "rtsp-tcp" );
 319
 320     /* Initialise each media subsession */
 321     iter = new MediaSubsessionIterator( *p_sys->ms );
 322     while( ( sub = iter->next() ) != NULL )
 323     {
 324         unsigned int i_buffer = 0;
 325         Boolean bInit;
 326
 327         /* Value taken from mplayer */
 328         if( !strcmp( sub->mediumName(), "audio" ) )
 329             i_buffer = 100000;
 330         else if( !strcmp( sub->mediumName(), "video" ) )
 331             i_buffer = 2000000;
 332         else
 333             continue;
 334
 335         if( !strcmp( sub->codecName(), "X-ASF-PF" ) )
 336             bInit = sub->initiate( 4 ); /* Constant ? */
 337         else
 338             bInit = sub->initiate();
 339
 340         if( !bInit )
 341         {
 342             msg_Warn( p_demux, "RTP subsession '%s/%s' failed (%s)",
 343                       sub->mediumName(), sub->codecName(),
 344                       p_sys->env->getResultMsg() );
 345         }
 346         else
 347         {
 348             if( sub->rtpSource() )
 349             {
 350                 int fd = sub->rtpSource()->RTPgs()->socketNum();
 351                 /* Increase the buffer size */
 352                 increaseReceiveBufferTo( *p_sys->env, fd, i_buffer );
 353             }
 354
 355             msg_Dbg( p_demux, "RTP subsession '%s/%s'", sub->mediumName(),
 356                      sub->codecName() );
 357
 358             /* Issue the SETUP */
 359             if( p_sys->rtsp )
 360             {
 361                 p_sys->rtsp->setupMediaSubsession( *sub, False,
 362                                                    b_rtsp_tcp ? True : False );
 363             }
 364         }
 365     }
 366
 367     if( p_sys->rtsp )
 368     {
 369         /* The PLAY */
 370         if( !p_sys->rtsp->playMediaSession( *p_sys->ms ) )
 371         {
 372             msg_Err( p_demux, "PLAY failed %s", p_sys->env->getResultMsg() );
 373             goto error;
 374         }
 375     }
 376
 377     /* Create all es struct */
 378     iter->reset();
 379     while( ( sub = iter->next() ) != NULL )
 380     {
 381         live_track_t *tk;
 382
 383         if( sub->readSource() == NULL )
 384         {
 385             continue;
 386         }
 387
 388         tk = (live_track_t*)malloc( sizeof( live_track_t ) );
 389         tk->p_demux = p_demux;
 390         tk->waiting = 0;
 391         tk->i_pts   = 0;
 392         tk->b_quicktime = VLC_FALSE;
 393         tk->b_muxed     = VLC_FALSE;
 394         tk->b_asf       = VLC_FALSE;
 395         tk->b_rtcp_sync = VLC_FALSE;
 396         tk->p_out_muxed = NULL;
 397         tk->p_es        = NULL;
 398         tk->i_buffer    = 65536;
 399         tk->p_buffer    = (uint8_t *)malloc( 65536 );
 400
 401         /* Value taken from mplayer */
 402         if( !strcmp( sub->mediumName(), "audio" ) )
 403         {
 404             es_format_Init( &tk->fmt, AUDIO_ES, VLC_FOURCC('u','n','d','f') );
 405             tk->fmt.audio.i_channels = sub->numChannels();
 406             tk->fmt.audio.i_rate = sub->rtpSource()->timestampFrequency();
 407
 408             if( !strcmp( sub->codecName(), "MPA" ) ||
 409                 !strcmp( sub->codecName(), "MPA-ROBUST" ) ||
 410                 !strcmp( sub->codecName(), "X-MP3-DRAFT-00" ) )
 411             {
 412                 tk->fmt.i_codec = VLC_FOURCC( 'm', 'p', 'g', 'a' );
 413                 tk->fmt.audio.i_rate = 0;
 414             }
 415             else if( !strcmp( sub->codecName(), "AC3" ) )
 416             {
 417                 tk->fmt.i_codec = VLC_FOURCC( 'a', '5', '2', ' ' );
 418                 tk->fmt.audio.i_rate = 0;
 419             }
 420             else if( !strcmp( sub->codecName(), "L16" ) )
 421             {
 422                 tk->fmt.i_codec = VLC_FOURCC( 't', 'w', 'o', 's' );
 423                 tk->fmt.audio.i_bitspersample = 16;
 424             }
 425             else if( !strcmp( sub->codecName(), "L8" ) )
 426             {
 427                 tk->fmt.i_codec = VLC_FOURCC( 'a', 'r', 'a', 'w' );
 428                 tk->fmt.audio.i_bitspersample = 8;
 429             }
 430             else if( !strcmp( sub->codecName(), "PCMU" ) )
 431             {
 432                 tk->fmt.i_codec = VLC_FOURCC( 'u', 'l', 'a', 'w' );
 433             }
 434             else if( !strcmp( sub->codecName(), "PCMA" ) )
 435             {
 436                 tk->fmt.i_codec = VLC_FOURCC( 'a', 'l', 'a', 'w' );
 437             }
 438             else if( !strcmp( sub->codecName(), "MP4A-LATM" ) )
 439             {
 440                 unsigned int i_extra;
 441                 uint8_t      *p_extra;
 442
 443                 tk->fmt.i_codec = VLC_FOURCC( 'm', 'p', '4', 'a' );
 444
 445                 if( ( p_extra = parseStreamMuxConfigStr( sub->fmtp_config(),
 446                                                          i_extra ) ) )
 447                 {
 448                     tk->fmt.i_extra = i_extra;
 449                     tk->fmt.p_extra = malloc( i_extra );
 450                     memcpy( tk->fmt.p_extra, p_extra, i_extra );
 451                     delete[] p_extra;
 452                 }
 453             }
 454             else if( !strcmp( sub->codecName(), "MPEG4-GENERIC" ) )
 455             {
 456                 unsigned int i_extra;
 457                 uint8_t      *p_extra;
 458
 459                 tk->fmt.i_codec = VLC_FOURCC( 'm', 'p', '4', 'a' );
 460
 461                 if( ( p_extra = parseGeneralConfigStr( sub->fmtp_config(),
 462                                                        i_extra ) ) )
 463                 {
 464                     tk->fmt.i_extra = i_extra;
 465                     tk->fmt.p_extra = malloc( i_extra );
 466                     memcpy( tk->fmt.p_extra, p_extra, i_extra );
 467                     delete[] p_extra;
 468                 }
 469             }
 470             else if( !strcmp( sub->codecName(), "X-ASF-PF" ) )
 471             {
 472                 tk->b_asf = VLC_TRUE;
 473                 if( p_sys->p_out_asf == NULL )
 474                     p_sys->p_out_asf = stream_DemuxNew( p_demux, "asf",
 475                                                         p_demux->out );
 476             }
 477         }
 478         else if( !strcmp( sub->mediumName(), "video" ) )
 479         {
 480             es_format_Init( &tk->fmt, VIDEO_ES, VLC_FOURCC('u','n','d','f') );
 481             if( !strcmp( sub->codecName(), "MPV" ) )
 482             {
 483                 tk->fmt.i_codec = VLC_FOURCC( 'm', 'p', 'g', 'v' );
 484             }
 485             else if( !strcmp( sub->codecName(), "H263" ) ||
 486                      !strcmp( sub->codecName(), "H263-1998" ) ||
 487                      !strcmp( sub->codecName(), "H263-2000" ) )
 488             {
 489                 tk->fmt.i_codec = VLC_FOURCC( 'H', '2', '6', '3' );
 490             }
 491             else if( !strcmp( sub->codecName(), "H261" ) )
 492             {
 493                 tk->fmt.i_codec = VLC_FOURCC( 'H', '2', '6', '1' );
 494             }
 495             else if( !strcmp( sub->codecName(), "JPEG" ) )
 496             {
 497                 tk->fmt.i_codec = VLC_FOURCC( 'M', 'J', 'P', 'G' );
 498             }
 499             else if( !strcmp( sub->codecName(), "MP4V-ES" ) )
 500             {
 501                 unsigned int i_extra;
 502                 uint8_t      *p_extra;
 503
 504                 tk->fmt.i_codec = VLC_FOURCC( 'm', 'p', '4', 'v' );
 505
 506                 if( ( p_extra = parseGeneralConfigStr( sub->fmtp_config(),
 507                                                        i_extra ) ) )
 508                 {
 509                     tk->fmt.i_extra = i_extra;
 510                     tk->fmt.p_extra = malloc( i_extra );
 511                     memcpy( tk->fmt.p_extra, p_extra, i_extra );
 512                     delete[] p_extra;
 513                 }
 514             }
 515             else if( !strcmp( sub->codecName(), "X-QT" ) ||
 516                      !strcmp( sub->codecName(), "X-QUICKTIME" ) ||
 517                      !strcmp( sub->codecName(), "X-QDM" ) ||
 518                      !strcmp( sub->codecName(), "X-SV3V-ES" )  ||
 519                      !strcmp( sub->codecName(), "X-SORENSONVIDEO" ) )
 520             {
 521                 tk->b_quicktime = VLC_TRUE;
 522             }
 523             else if( !strcmp( sub->codecName(), "MP2T" ) )
 524             {
 525                 tk->b_muxed = VLC_TRUE;
 526                 tk->p_out_muxed = stream_DemuxNew( p_demux, "ts", p_demux->out );
 527             }
 528             else if( !strcmp( sub->codecName(), "MP2P" ) ||
 529                      !strcmp( sub->codecName(), "MP1S" ) )
 530             {
 531                 tk->b_muxed = VLC_TRUE;
 532                 tk->p_out_muxed = stream_DemuxNew( p_demux, "ps",
 533                                                    p_demux->out );
 534             }
 535             else if( !strcmp( sub->codecName(), "X-ASF-PF" ) )
 536             {
 537                 tk->b_asf = VLC_TRUE;
 538                 if( p_sys->p_out_asf == NULL )
 539                     p_sys->p_out_asf = stream_DemuxNew( p_demux, "asf",
 540                                                         p_demux->out );;
 541             }
 542         }
 543
 544         if( tk->fmt.i_codec != VLC_FOURCC( 'u', 'n', 'd', 'f' ) )
 545         {
 546             tk->p_es = es_out_Add( p_demux->out, &tk->fmt );
 547         }
 548
 549         if( sub->rtcpInstance() != NULL )
 550         {
 551             sub->rtcpInstance()->setByeHandler( StreamClose, tk );
 552         }
 553
 554         if( tk->p_es || tk->b_quicktime || tk->b_muxed || tk->b_asf )
 555         {
 556             tk->readSource = sub->readSource();
 557             tk->rtpSource  = sub->rtpSource();
 558
 559             /* Append */
 560             p_sys->track = (live_track_t**)realloc( p_sys->track, sizeof( live_track_t ) * ( p_sys->i_track + 1 ) );
 561             p_sys->track[p_sys->i_track++] = tk;
 562         }
 563         else
 564         {
 565             free( tk );
 566         }
 567     }
 568
 569     delete iter;
 570
 571     if( p_sys->p_out_asf && ParseASF( p_demux ) )
 572     {
 573         msg_Err( p_demux, "cannot find a usable asf header" );
 574         /* TODO Clean tracks */
 575         goto error;
 576     }
 577
 578     p_sys->i_length = (mtime_t)(p_sys->ms->playEndTime() * 1000000.0);
 579     if( p_sys->i_length < 0 )
 580     {
 581         p_sys->i_length = 0;
 582     }
 583     else if( p_sys->i_length > 0 )
 584     {
 585         /* FIXME */
 586         /* p_input->stream.p_selected_area->i_size = 1000;*/ /* needed for now */
 587     }
 588
 589     if( p_sys->i_track <= 0 )
 590     {
 591         msg_Err( p_demux, "no codec supported, aborting" );
 592         goto error;
 593     }
 594
 595     return VLC_SUCCESS;
 596
 597 error:
 598     if( p_sys->p_out_asf )
 599     {
 600         stream_DemuxDelete( p_sys->p_out_asf );
 601     }
 602     if( p_sys->ms )
 603     {
 604         Medium::close( p_sys->ms );
 605     }
 606     if( p_sys->rtsp )
 607     {
 608         Medium::close( p_sys->rtsp );
 609     }
 610     if( p_sys->env )
 611     {
 612         RECLAIM_ENV(p_sys->env);
 613     }
 614     if( p_sys->scheduler )
 615     {
 616         delete p_sys->scheduler;
 617     }
 618     if( p_sys->p_sdp )
 619     {
 620         free( p_sys->p_sdp );
 621     }
 622     free( p_sys );
 623     return VLC_EGENERIC;
 624 }
 625
 626 /*****************************************************************************
 627  * DemuxClose:
 628  *****************************************************************************/
 629 static void Close( vlc_object_t *p_this )
 630 {
 631     demux_t *p_demux = (demux_t*)p_this;
 632     demux_sys_t *p_sys = p_demux->p_sys;
 633     int i;
 634
 635     for( i = 0; i < p_sys->i_track; i++ )
 636     {
 637         live_track_t *tk = p_sys->track[i];
 638
 639         if( tk->b_muxed ) stream_DemuxDelete( tk->p_out_muxed );
 640         free( tk->p_buffer );
 641         free( tk );
 642     }
 643
 644     if( p_sys->i_track ) free( p_sys->track );
 645     if( p_sys->p_out_asf ) stream_DemuxDelete( p_sys->p_out_asf );
 646
 647     if( p_sys->rtsp && p_sys->ms )
 648     {
 649         /* TEARDOWN */
 650         p_sys->rtsp->teardownMediaSession( *p_sys->ms );
 651     }
 652
 653     Medium::close( p_sys->ms );
 654
 655     if( p_sys->rtsp ) Medium::close( p_sys->rtsp );
 656     if( p_sys->env ) RECLAIM_ENV(p_sys->env);
 657     if( p_sys->scheduler ) delete p_sys->scheduler;
 658     if( p_sys->p_sdp ) free( p_sys->p_sdp );
 659     free( p_sys );
 660 }
 661
 662 /*****************************************************************************
 663  * Demux:
 664  *****************************************************************************/
 665 static int Demux( demux_t *p_demux )
 666 {
 667     demux_sys_t    *p_sys = p_demux->p_sys;
 668     TaskToken      task;
 669
 670     vlc_bool_t      b_send_pcr = VLC_TRUE;
 671     mtime_t         i_pcr = 0;
 672     int             i;
 673
 674     for( i = 0; i < p_sys->i_track; i++ )
 675     {
 676         live_track_t *tk = p_sys->track[i];
 677
 678         if( tk->b_asf || tk->b_muxed )
 679             b_send_pcr = VLC_FALSE;
 680
 681         if( i_pcr == 0 )
 682         {
 683             i_pcr = tk->i_pts;
 684         }
 685         else if( tk->i_pts != 0 && i_pcr > tk->i_pts )
 686         {
 687             i_pcr = tk->i_pts ;
 688         }
 689     }
 690     if( i_pcr != p_sys->i_pcr && i_pcr > 0 )
 691     {
 692         p_sys->i_pcr = i_pcr;
 693
 694         if( b_send_pcr )
 695             es_out_Control( p_demux->out, ES_OUT_SET_PCR, i_pcr );
 696         if( p_sys->i_pcr_start <= 0 || p_sys->i_pcr_start > i_pcr ||
 697             ( p_sys->i_length > 0 && i_pcr - p_sys->i_pcr_start > p_sys->i_length ) )
 698         {
 699             p_sys->i_pcr_start = i_pcr;
 700         }
 701     }
 702
 703     /* First warm we want to read data */
 704     p_sys->event = 0;
 705     for( i = 0; i < p_sys->i_track; i++ )
 706     {
 707         live_track_t *tk = p_sys->track[i];
 708
 709         if( tk->waiting == 0 )
 710         {
 711             tk->waiting = 1;
 712             tk->readSource->getNextFrame( tk->p_buffer, tk->i_buffer,
 713                                           StreamRead, tk, StreamClose, tk );
 714         }
 715     }
 716     /* Create a task that will be called if we wait more than 300ms */
 717     task = p_sys->scheduler->scheduleDelayedTask( 300000, TaskInterrupt, p_demux );
 718
 719     /* Do the read */
 720     p_sys->scheduler->doEventLoop( &p_sys->event );
 721
 722     /* remove the task */
 723     p_sys->scheduler->unscheduleDelayedTask( task );
 724
 725     /* Check for gap in pts value */
 726     for( i = 0; i < p_sys->i_track; i++ )
 727     {
 728         live_track_t *tk = p_sys->track[i];
 729
 730         if( !tk->b_muxed && !tk->b_rtcp_sync &&
 731             tk->rtpSource->hasBeenSynchronizedUsingRTCP() )
 732         {
 733             msg_Dbg( p_demux, "tk->rtpSource->hasBeenSynchronizedUsingRTCP()" );
 734
 735             es_out_Control( p_demux->out, ES_OUT_RESET_PCR );
 736             tk->b_rtcp_sync = VLC_TRUE;
 737
 738             /* reset PCR and PCR start, mmh won't work well for multi-stream I fear */
 739             tk->i_pts = 0;
 740             p_sys->i_pcr_start = 0;
 741             p_sys->i_pcr = 0;
 742             i_pcr = 0;
 743         }
 744     }
 745
 746     if( p_sys->b_no_data && p_sys->i_no_data_ti > 3 )
 747     {
 748         vlc_bool_t b_rtsp_tcp = var_GetBool( p_demux, "rtsp-tcp" );
 749
 750         if( !b_rtsp_tcp && p_sys->rtsp && p_sys->ms )
 751         {
 752             msg_Warn( p_demux, "no data received in 900ms. Switching to TCP" );
 753             if( RollOverTcp( p_demux ) )
 754             {
 755                 msg_Err( p_demux, "TCP rollover failed, aborting" );
 756                 return 0;
 757             }
 758             var_SetBool( p_demux, "rtsp-tcp", VLC_TRUE );
 759         }
 760         else if( p_sys->i_no_data_ti > 10 )
 761         {
 762             msg_Err( p_demux, "no data received in 3s, aborting" );
 763             return 0;
 764         }
 765     }
 766     else if( p_sys->i_no_data_ti > 10 )
 767     {
 768         /* EOF ? */
 769         msg_Warn( p_demux, "no data received in 3s, eof ?" );
 770         return 0;
 771     }
 772
 773     return p_demux->b_error ? 0 : 1;
 774 }
 775
 776 /*****************************************************************************
 777  * Control:
 778  *****************************************************************************/
 779 static int Control( demux_t *p_demux, int i_query, va_list args )
 780 {
 781     demux_sys_t *p_sys = p_demux->p_sys;
 782     int64_t *pi64;
 783     double  *pf, f;
 784     vlc_bool_t *pb, b_bool;
 785
 786     switch( i_query )
 787     {
 788         case DEMUX_GET_TIME:
 789             pi64 = (int64_t*)va_arg( args, int64_t * );
 790             *pi64 = p_sys->i_pcr - p_sys->i_pcr_start + p_sys->i_start;
 791             return VLC_SUCCESS;
 792
 793         case DEMUX_GET_LENGTH:
 794             pi64 = (int64_t*)va_arg( args, int64_t * );
 795             *pi64 = p_sys->i_length;
 796             return VLC_SUCCESS;
 797
 798         case DEMUX_GET_POSITION:
 799             pf = (double*)va_arg( args, double* );
 800             if( p_sys->i_length > 0 )
 801             {
 802                 *pf = (double)( p_sys->i_pcr - p_sys->i_pcr_start +
 803                                 p_sys->i_start ) / (double)(p_sys->i_length);
 804             }
 805             else
 806             {
 807                 *pf = 0;
 808             }
 809             return VLC_SUCCESS;
 810
 811         case DEMUX_SET_POSITION:
 812         {
 813             float time;
 814
 815             f = (double)va_arg( args, double );
 816             time = f * (double)p_sys->i_length / 1000000.0;   /* in second */
 817
 818             if( p_sys->rtsp && p_sys->i_length > 0 )
 819             {
 820                 MediaSubsessionIterator *iter =
 821                     new MediaSubsessionIterator( *p_sys->ms );
 822                 MediaSubsession *sub;
 823                 int i;
 824
 825                 while( ( sub = iter->next() ) != NULL )
 826                 {
 827                     p_sys->rtsp->playMediaSubsession( *sub, time );
 828                 }
 829                 delete iter;
 830                 p_sys->i_start = (mtime_t)(f * (double)p_sys->i_length);
 831                 p_sys->i_pcr_start = 0;
 832                 p_sys->i_pcr       = 0;
 833
 834                 for( i = 0; i < p_sys->i_track; i++ )
 835                 {
 836                     p_sys->track[i]->i_pts = 0;
 837                 }
 838
 839                 return VLC_SUCCESS;
 840             }
 841             return VLC_SUCCESS;
 842         }
 843
 844         /* Special for access_demux */
 845         case DEMUX_CAN_PAUSE:
 846             pb = (vlc_bool_t*)va_arg( args, vlc_bool_t * );
 847             if( p_sys->rtsp && p_sys->i_length )
 848                 /* Not always true, but will be handled in SET_PAUSE_STATE */
 849                 *pb = VLC_TRUE;
 850             else
 851                 *pb = VLC_FALSE;
 852             return VLC_SUCCESS;
 853
 854         case DEMUX_CAN_CONTROL_PACE:
 855             pb = (vlc_bool_t*)va_arg( args, vlc_bool_t * );
 856
 857 #if 0       /* Disable for now until we have a clock synchro algo
 858              * which works with something else than MPEG over UDP */
 859             *pb = VLC_FALSE;
 860 #endif
 861             *pb = VLC_TRUE;
 862             return VLC_SUCCESS;
 863
 864         case DEMUX_SET_PAUSE_STATE:
 865             double d_npt;
 866             MediaSubsessionIterator *iter;
 867             MediaSubsession *sub;
 868
 869             d_npt = ( (double)( p_sys->i_pcr - p_sys->i_pcr_start +
 870                                 p_sys->i_start ) ) / 1000000.00;
 871
 872             b_bool = (vlc_bool_t)va_arg( args, vlc_bool_t );
 873             if( p_sys->rtsp == NULL )
 874                 return VLC_EGENERIC;
 875
 876             iter = new MediaSubsessionIterator( *p_sys->ms );
 877             while( ( sub = iter->next() ) != NULL )
 878             {
 879                 if( ( b_bool && !p_sys->rtsp->pauseMediaSubsession( *sub ) ) ||
 880                     ( !b_bool && !p_sys->rtsp->playMediaSubsession( *sub,
 881                       d_npt > 0 ? d_npt : -1 ) ) )
 882                 {
 883                     delete iter;
 884                     return VLC_EGENERIC;
 885                 }
 886             }
 887             delete iter;
 888 #if 0
 889             /* reset PCR and PCR start, mmh won't work well for multi-stream I fear */
 890             for( i = 0; i < p_sys->i_track; i++ )
 891             {
 892                 p_sys->track[i]->i_pts = 0;
 893             }
 894             p_sys->i_pcr_start = 0; /* FIXME Wrong */
 895             p_sys->i_pcr = 0;
 896 #endif
 897             return VLC_SUCCESS;
 898
 899         case DEMUX_GET_TITLE_INFO:
 900         case DEMUX_SET_TITLE:
 901         case DEMUX_SET_SEEKPOINT:
 902             return VLC_EGENERIC;
 903
 904         case DEMUX_GET_PTS_DELAY:
 905             pi64 = (int64_t*)va_arg( args, int64_t * );
 906             *pi64 = (int64_t)var_GetInteger( p_demux, "rtsp-caching" ) * 1000;
 907             return VLC_SUCCESS;
 908
 909         default:
 910             return VLC_EGENERIC;
 911     }
 912 }
 913
 914 /*****************************************************************************
 915  * RollOverTcp: reopen the rtsp into TCP mode
 916  * XXX: ugly, a lot of code are duplicated from Open()
 917  *****************************************************************************/
 918 static int RollOverTcp( demux_t *p_demux )
 919 {
 920     demux_sys_t *p_sys = p_demux->p_sys;
 921     MediaSubsessionIterator *iter;
 922     MediaSubsession *sub;
 923     char *psz_url;
 924     char *psz_options;
 925     uint8_t *p_sdp;
 926     int i_tk;
 927
 928     /* We close the old RTSP session */
 929     p_sys->rtsp->teardownMediaSession( *p_sys->ms );
 930
 931     Medium::close( p_sys->ms );
 932     Medium::close( p_sys->rtsp );
 933
 934     p_sys->ms = NULL;
 935     p_sys->rtsp = NULL;
 936
 937     /* Reopen rtsp client */
 938     if( ( p_sys->rtsp = RTSPClient::createNew(*p_sys->env, 1/*verbose*/,
 939           "VLC Media Player" ) ) == NULL )
 940     {
 941         msg_Err( p_demux, "RTSPClient::createNew failed (%s)",
 942                  p_sys->env->getResultMsg() );
 943         return VLC_EGENERIC;
 944     }
 945
 946     asprintf( &psz_url, "rtsp://%s", p_demux->psz_path );
 947
 948     if( ( psz_options = p_sys->rtsp->sendOptionsCmd( psz_url ) ) )
 949         delete [] psz_options;
 950
 951     p_sdp = (uint8_t*)p_sys->rtsp->describeURL( psz_url,
 952                           NULL, var_CreateGetBool( p_demux, "rtsp-kasenna" ) );
 953     free( psz_url );
 954     if( p_sdp == NULL )
 955     {
 956         msg_Err( p_demux, "describeURL failed (%s)",
 957                  p_sys->env->getResultMsg() );
 958         return VLC_EGENERIC;
 959     }
 960
 961     /* malloc-ated copy */
 962     p_sys->p_sdp = strdup( (char*)p_sdp );
 963     delete[] p_sdp;
 964
 965     if( !( p_sys->ms = MediaSession::createNew( *p_sys->env, p_sys->p_sdp ) ) )
 966     {
 967         msg_Err( p_demux, "MediaSession::createNew failed" );
 968         return VLC_EGENERIC;
 969     }
 970
 971     /* Initialise each media subsession */
 972     iter = new MediaSubsessionIterator( *p_sys->ms );
 973     while( ( sub = iter->next() ) != NULL )
 974     {
 975         Boolean bInit;
 976
 977         if( !strcmp( sub->codecName(), "X-ASF-PF" ) )
 978             bInit = sub->initiate( 4 ); /* Constant ? */
 979         else
 980             bInit = sub->initiate();
 981
 982         if( !bInit )
 983         {
 984             msg_Warn( p_demux, "RTP subsession '%s/%s' failed (%s)",
 985                       sub->mediumName(), sub->codecName(),
 986                       p_sys->env->getResultMsg() );
 987             continue;
 988         }
 989         msg_Dbg( p_demux, "RTP subsession '%s/%s'", sub->mediumName(),
 990                  sub->codecName() );
 991
 992         /* Issue the SETUP */
 993         p_sys->rtsp->setupMediaSubsession( *sub, False, True /* tcp */ );
 994     }
 995
 996     /* The PLAY */
 997     if( !p_sys->rtsp->playMediaSession( *p_sys->ms ) )
 998     {
 999         msg_Err( p_demux, "PLAY failed %s", p_sys->env->getResultMsg() );
1000         return VLC_EGENERIC;
1001     }
1002
1003     /* Update all tracks */
1004     iter->reset();
1005     i_tk = 0;
1006     while( ( sub = iter->next() ) != NULL )
1007     {
1008         live_track_t *tk;
1009
1010         if( sub->readSource() == NULL )
1011             continue;
1012         if( i_tk >= p_sys->i_track )
1013         {
1014             msg_Err( p_demux, "WTF !" );
1015             break;
1016         }
1017
1018         tk = p_sys->track[i_tk];
1019
1020         /* Reset state */
1021         tk->waiting = 0;
1022         tk->i_pts   = 0;
1023         tk->b_rtcp_sync = VLC_FALSE;
1024
1025         if( sub->rtcpInstance() != NULL )
1026             sub->rtcpInstance()->setByeHandler( StreamClose, tk );
1027
1028         tk->readSource = sub->readSource();
1029         tk->rtpSource  = sub->rtpSource();
1030
1031         i_tk++;
1032     }
1033
1034     delete iter;
1035
1036     return VLC_SUCCESS;
1037 }
1038
1039
1040 /*****************************************************************************
1041  *
1042  *****************************************************************************/
1043 static void StreamRead( void *p_private, unsigned int i_size,
1044                         unsigned int i_truncated_bytes, struct timeval pts,
1045                         unsigned int duration )
1046 {
1047     live_track_t   *tk = (live_track_t*)p_private;
1048     demux_t        *p_demux = tk->p_demux;
1049     demux_sys_t    *p_sys = p_demux->p_sys;
1050     block_t        *p_block;
1051
1052     mtime_t i_pts = (uint64_t)pts.tv_sec * UI64C(1000000) +
1053         (uint64_t)pts.tv_usec;
1054
1055     /* XXX Beurk beurk beurk Avoid having negative value XXX */
1056     i_pts &= UI64C(0x00ffffffffffffff);
1057
1058     if( tk->b_quicktime && tk->p_es == NULL )
1059     {
1060         QuickTimeGenericRTPSource *qtRTPSource =
1061             (QuickTimeGenericRTPSource*)tk->rtpSource;
1062         QuickTimeGenericRTPSource::QTState &qtState = qtRTPSource->qtState;
1063         uint8_t *sdAtom = (uint8_t*)&qtState.sdAtom[4];
1064
1065         if( qtState.sdAtomSize < 16 + 32 )
1066         {
1067             /* invalid */
1068             p_sys->event = 0xff;
1069             tk->waiting = 0;
1070             return;
1071         }
1072         tk->fmt.i_codec = VLC_FOURCC(sdAtom[0],sdAtom[1],sdAtom[2],sdAtom[3]);
1073         tk->fmt.video.i_width  = (sdAtom[28] << 8) | sdAtom[29];
1074         tk->fmt.video.i_height = (sdAtom[30] << 8) | sdAtom[31];
1075
1076         tk->fmt.i_extra        = qtState.sdAtomSize - 16;
1077         tk->fmt.p_extra        = malloc( tk->fmt.i_extra );
1078         memcpy( tk->fmt.p_extra, &sdAtom[12], tk->fmt.i_extra );
1079
1080         tk->p_es = es_out_Add( p_demux->out, &tk->fmt );
1081     }
1082
1083 #if 0
1084     fprintf( stderr, "StreamRead size=%d pts=%lld\n",
1085              i_size,
1086              pts.tv_sec * 1000000LL + pts.tv_usec );
1087 #endif
1088
1089     /* grow buffer if it looks like buffer is too small, but don't eat
1090      * up all the memory on strange streams */
1091     if( i_truncated_bytes > 0 && tk->i_buffer < 2000000 )
1092     {
1093         void *p_tmp;
1094         msg_Dbg( p_demux, "lost %d bytes", i_truncated_bytes );
1095         msg_Dbg( p_demux, "increasing buffer size to %d", tk->i_buffer * 2 );
1096         tk->i_buffer *= 2;
1097         p_tmp = realloc( tk->p_buffer, tk->i_buffer );
1098         if (p_tmp == NULL)
1099         {
1100             msg_Warn( p_demux, "realloc failed" );
1101         }
1102         else
1103         {
1104             tk->p_buffer = (uint8_t*)p_tmp;
1105         }
1106     }
1107     if( i_size > tk->i_buffer )
1108     {
1109         msg_Warn( p_demux, "buffer overflow" );
1110     }
1111     /* FIXME could i_size be > buffer size ? */
1112     if( tk->fmt.i_codec == VLC_FOURCC('h','2','6','1') )
1113     {
1114 #if LIVEMEDIA_LIBRARY_VERSION_INT >= 1081468800
1115         H261VideoRTPSource *h261Source = (H261VideoRTPSource*)tk->rtpSource;
1116         uint32_t header = h261Source->lastSpecialHeader();
1117 #else
1118         uint32_t header = 0;
1119         msg_Warn( p_demux, "need livemedia library >= \"2004.04.09\"" );
1120 #endif
1121         p_block = block_New( p_demux, i_size + 4 );
1122         memcpy( p_block->p_buffer, &header, 4 );
1123         memcpy( p_block->p_buffer + 4, tk->p_buffer, i_size );
1124     }
1125     else if( tk->b_asf )
1126     {
1127         int i_copy = __MIN( p_sys->asfh.i_min_data_packet_size, (int)i_size );
1128         p_block = block_New( p_demux, p_sys->asfh.i_min_data_packet_size );
1129
1130         memcpy( p_block->p_buffer, tk->p_buffer, i_copy );
1131     }
1132     else
1133     {
1134         p_block = block_New( p_demux, i_size );
1135         memcpy( p_block->p_buffer, tk->p_buffer, i_size );
1136     }
1137     if( tk->fmt.i_codec == VLC_FOURCC('h','2','6','1') &&
1138         tk->rtpSource->curPacketMarkerBit() )
1139     {
1140         p_block->i_flags |= BLOCK_FLAG_END_OF_FRAME;
1141     }
1142     //p_block->i_rate = p_input->stream.control.i_rate;
1143
1144     if( i_pts != tk->i_pts && !tk->b_muxed )
1145     {
1146         p_block->i_dts = ( tk->fmt.i_cat == VIDEO_ES ) ? 0 : i_pts;
1147         p_block->i_pts = i_pts;
1148     }
1149     //fprintf( stderr, "tk -> dpts=%lld\n", i_pts - tk->i_pts );
1150
1151     if( tk->b_muxed )
1152     {
1153         stream_DemuxSend( tk->p_out_muxed, p_block );
1154     }
1155     else if( tk->b_asf )
1156     {
1157         stream_DemuxSend( p_sys->p_out_asf, p_block );
1158     }
1159     else
1160     {
1161         es_out_Send( p_demux->out, tk->p_es, p_block );
1162     }
1163
1164     /* warm that's ok */
1165     p_sys->event = 0xff;
1166
1167     /* we have read data */
1168     tk->waiting = 0;
1169     p_demux->p_sys->b_no_data = VLC_FALSE;
1170     p_demux->p_sys->i_no_data_ti = 0;
1171
1172     if( i_pts > 0 && !tk->b_muxed )
1173     {
1174         tk->i_pts = i_pts;
1175     }
1176 }
1177
1178 /*****************************************************************************
1179  *
1180  *****************************************************************************/
1181 static void StreamClose( void *p_private )
1182 {
1183     live_track_t   *tk = (live_track_t*)p_private;
1184     demux_t        *p_demux = tk->p_demux;
1185     demux_sys_t    *p_sys = p_demux->p_sys;
1186
1187     fprintf( stderr, "StreamClose\n" );
1188
1189     p_sys->event = 0xff;
1190     p_demux->b_error = VLC_TRUE;
1191 }
1192
1193
1194 /*****************************************************************************
1195  *
1196  *****************************************************************************/
1197 static void TaskInterrupt( void *p_private )
1198 {
1199     demux_t *p_demux = (demux_t*)p_private;
1200
1201     fprintf( stderr, "TaskInterrupt\n" );
1202
1203     p_demux->p_sys->i_no_data_ti++;
1204
1205     /* Avoid lock */
1206     p_demux->p_sys->event = 0xff;
1207 }
1208
1209 /*****************************************************************************
1210  *
1211  *****************************************************************************/
1212 static int b64_decode( char *dest, char *src );
1213
1214 static int ParseASF( demux_t *p_demux )
1215 {
1216     demux_sys_t    *p_sys = p_demux->p_sys;
1217
1218     const char *psz_marker = "a=pgmpu:data:application/vnd.ms.wms-hdr.asfv1;base64,";
1219     char *psz_asf = strcasestr( p_sys->p_sdp, psz_marker );
1220     char *psz_end;
1221     block_t *p_header;
1222
1223     /* Parse the asf header */
1224     if( psz_asf == NULL )
1225         return VLC_EGENERIC;
1226
1227     psz_asf += strlen( psz_marker );
1228     psz_asf = strdup( psz_asf );    /* Duplicate it */
1229     psz_end = strchr( psz_asf, '\n' );
1230
1231     while( psz_end > psz_asf && ( *psz_end == '\n' || *psz_end == '\r' ) )
1232         *psz_end-- = '\0';
1233
1234     if( psz_asf >= psz_end )
1235     {
1236         free( psz_asf );
1237         return VLC_EGENERIC;
1238     }
1239
1240     /* Always smaller */
1241     p_header = block_New( p_demux, psz_end - psz_asf );
1242     p_header->i_buffer = b64_decode( (char*)p_header->p_buffer, psz_asf );
1243     fprintf( stderr, "Size=%d Hdrb64=%s\n", p_header->i_buffer, psz_asf );
1244     if( p_header->i_buffer <= 0 )
1245     {
1246         free( psz_asf );
1247         return VLC_EGENERIC;
1248     }
1249
1250     /* Parse it to get packet size */
1251     E_(asf_HeaderParse)( &p_sys->asfh, p_header->p_buffer, p_header->i_buffer );
1252
1253     /* Send it to demuxer */
1254     stream_DemuxSend( p_sys->p_out_asf, p_header );
1255
1256     free( psz_asf );
1257     return VLC_SUCCESS;
1258 }
1259 /*char b64[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";*/
1260 static int b64_decode( char *dest, char *src )
1261 {
1262     const char *dest_start = dest;
1263     int  i_level;
1264     int  last = 0;
1265     int  b64[256] = {
1266         -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,  /* 00-0F */
1267         -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,  /* 10-1F */
1268         -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,62,-1,-1,-1,63,  /* 20-2F */
1269         52,53,54,55,56,57,58,59,60,61,-1,-1,-1,-1,-1,-1,  /* 30-3F */
1270         -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,10,11,12,13,14,  /* 40-4F */
1271         15,16,17,18,19,20,21,22,23,24,25,-1,-1,-1,-1,-1,  /* 50-5F */
1272         -1,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,  /* 60-6F */
1273         41,42,43,44,45,46,47,48,49,50,51,-1,-1,-1,-1,-1,  /* 70-7F */
1274         -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,  /* 80-8F */
1275         -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,  /* 90-9F */
1276         -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,  /* A0-AF */
1277         -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,  /* B0-BF */
1278         -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,  /* C0-CF */
1279         -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,  /* D0-DF */
1280         -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,  /* E0-EF */
1281         -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1   /* F0-FF */
1282         };
1283
1284     for( i_level = 0; *src != '\0'; src++ )
1285     {
1286         int  c;
1287
1288         c = b64[(unsigned int)*src];
1289         if( c == -1 )
1290         {
1291             continue;
1292         }
1293
1294         switch( i_level )
1295         {
1296             case 0:
1297                 i_level++;
1298                 break;
1299             case 1:
1300                 *dest++ = ( last << 2 ) | ( ( c >> 4)&0x03 );
1301                 i_level++;
1302                 break;
1303             case 2:
1304                 *dest++ = ( ( last << 4 )&0xf0 ) | ( ( c >> 2 )&0x0f );
1305                 i_level++;
1306                 break;
1307             case 3:
1308                 *dest++ = ( ( last &0x03 ) << 6 ) | c;
1309                 i_level = 0;
1310         }
1311         last = c;
1312     }
1313
1314     *dest = '\0';
1315
1316     return dest - dest_start;
1317 }