git.sesse.net Git - vlc/blob - modules/demux/ogg.c

   1 /*****************************************************************************
   2  * ogg.c : ogg stream demux module for vlc
   3  *****************************************************************************
   4  * Copyright (C) 2001-2003 VideoLAN
   5  * $Id$
   6  *
   7  * Authors: Gildas Bazin <gbazin@netcourrier.com>
   8  *          Andre Pang <Andre.Pang@csiro.au> (Annodex support)
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
  23  *****************************************************************************/
  24
  25 /*****************************************************************************
  26  * Preamble
  27  *****************************************************************************/
  28 #include <vlc/vlc.h>
  29 #include <vlc/input.h>
  30
  31 #include <ogg/ogg.h>
  32
  33 #include "codecs.h"
  34 #include "vlc_bits.h"
  35
  36 /*****************************************************************************
  37  * Module descriptor
  38  *****************************************************************************/
  39 static int  Open ( vlc_object_t * );
  40 static void Close( vlc_object_t * );
  41
  42 vlc_module_begin();
  43     set_description( _("Ogg stream demuxer" ) );
  44     set_capability( "demux2", 50 );
  45     set_callbacks( Open, Close );
  46     add_shortcut( "ogg" );
  47 vlc_module_end();
  48
  49
  50 /*****************************************************************************
  51  * Definitions of structures and functions used by this plugins
  52  *****************************************************************************/
  53 typedef struct logical_stream_s
  54 {
  55     ogg_stream_state os;                        /* logical stream of packets */
  56
  57     es_format_t      fmt;
  58     es_out_id_t      *p_es;
  59     double           f_rate;
  60
  61     int              i_serial_no;
  62     int              b_activated;
  63
  64     /* the header of some logical streams (eg vorbis) contain essential
  65      * data for the decoder. We back them up here in case we need to re-feed
  66      * them to the decoder. */
  67     int              b_force_backup;
  68     int              i_packets_backup;
  69     ogg_packet       *p_packets_backup;
  70
  71     /* program clock reference (in units of 90kHz) derived from the previous
  72      * granulepos */
  73     mtime_t          i_pcr;
  74     mtime_t          i_interpolated_pcr;
  75     mtime_t          i_previous_pcr;
  76
  77     /* Misc */
  78     int b_reinit;
  79     int i_theora_keyframe_granule_shift;
  80
  81     /* for Annodex logical bitstreams */
  82     int secondary_header_packets;
  83
  84 } logical_stream_t;
  85
  86 struct demux_sys_t
  87 {
  88     ogg_sync_state oy;        /* sync and verify incoming physical bitstream */
  89
  90     int i_streams;                           /* number of logical bitstreams */
  91     logical_stream_t **pp_stream;  /* pointer to an array of logical streams */
  92
  93     /* program clock reference (in units of 90kHz) derived from the pcr of
  94      * the sub-streams */
  95     mtime_t i_pcr;
  96
  97     /* stream state */
  98     int     i_eos;
  99
 100     /* bitrate */
 101     int     i_bitrate;
 102 };
 103
 104 /* OggDS headers for the new header format (used in ogm files) */
 105 typedef struct stream_header_video
 106 {
 107     ogg_int32_t width;
 108     ogg_int32_t height;
 109 } stream_header_video;
 110
 111 typedef struct stream_header_audio
 112 {
 113     ogg_int16_t channels;
 114     ogg_int16_t blockalign;
 115     ogg_int32_t avgbytespersec;
 116 } stream_header_audio;
 117
 118 typedef struct stream_header
 119 {
 120     char        streamtype[8];
 121     char        subtype[4];
 122
 123     ogg_int32_t size;                               /* size of the structure */
 124
 125     ogg_int64_t time_unit;                              /* in reference time */
 126     ogg_int64_t samples_per_unit;
 127     ogg_int32_t default_len;                                /* in media time */
 128
 129     ogg_int32_t buffersize;
 130     ogg_int16_t bits_per_sample;
 131
 132     union
 133     {
 134         /* Video specific */
 135         stream_header_video video;
 136         /* Audio specific */
 137         stream_header_audio audio;
 138     } sh;
 139 } stream_header;
 140
 141 #define OGG_BLOCK_SIZE 4096
 142
 143 /* Some defines from OggDS */
 144 #define PACKET_TYPE_HEADER   0x01
 145 #define PACKET_TYPE_BITS     0x07
 146 #define PACKET_LEN_BITS01    0xc0
 147 #define PACKET_LEN_BITS2     0x02
 148 #define PACKET_IS_SYNCPOINT  0x08
 149
 150 /*****************************************************************************
 151  * Local prototypes
 152  *****************************************************************************/
 153 static int  Demux  ( demux_t * );
 154 static int  Control( demux_t *, int, va_list );
 155
 156 /* Bitstream manipulation */
 157 static int  Ogg_ReadPage     ( demux_t *, ogg_page * );
 158 static void Ogg_UpdatePCR    ( logical_stream_t *, ogg_packet * );
 159 static void Ogg_DecodePacket ( demux_t *, logical_stream_t *, ogg_packet * );
 160
 161 static int Ogg_BeginningOfStream( demux_t *p_demux );
 162 static int Ogg_FindLogicalStreams( demux_t *p_demux );
 163 static void Ogg_EndOfStream( demux_t *p_demux );
 164
 165 /* Logical bitstream headers */
 166 static void Ogg_ReadTheoraHeader( logical_stream_t *p_stream,
 167                                   ogg_packet *p_oggpacket );
 168 static void Ogg_ReadVorbisHeader( logical_stream_t *p_stream,
 169                                   ogg_packet *p_oggpacket );
 170 static void Ogg_ReadAnnodexHeader( vlc_object_t *, logical_stream_t *p_stream,
 171                                    ogg_packet *p_oggpacket );
 172
 173 /*****************************************************************************
 174  * Open: initializes ogg demux structures
 175  *****************************************************************************/
 176 static int Open( vlc_object_t * p_this )
 177 {
 178     demux_t *p_demux = (demux_t *)p_this;
 179     demux_sys_t    *p_sys;
 180     uint8_t        *p_peek;
 181
 182
 183     /* Check if we are dealing with an ogg stream */
 184     if( stream_Peek( p_demux->s, &p_peek, 4 ) < 4 )
 185     {
 186         msg_Err( p_demux, "cannot peek" );
 187         return VLC_EGENERIC;
 188     }
 189     if( strcmp( p_demux->psz_demux, "ogg" ) && strncmp( p_peek, "OggS", 4 ) )
 190     {
 191         msg_Warn( p_demux, "ogg module discarded (invalid header)" );
 192         return VLC_EGENERIC;
 193     }
 194
 195     /* Set exported functions */
 196     p_demux->pf_demux = Demux;
 197     p_demux->pf_control = Control;
 198     p_demux->p_sys = p_sys = malloc( sizeof( demux_sys_t ) );
 199
 200     memset( p_sys, 0, sizeof( demux_sys_t ) );
 201     p_sys->i_bitrate = 0;
 202     p_sys->pp_stream = NULL;
 203
 204     /* Begnning of stream, tell the demux to look for elementary streams. */
 205     p_sys->i_eos = 0;
 206
 207     /* Initialize the Ogg physical bitstream parser */
 208     ogg_sync_init( &p_sys->oy );
 209
 210     return VLC_SUCCESS;
 211 }
 212
 213 /*****************************************************************************
 214  * Close: frees unused data
 215  *****************************************************************************/
 216 static void Close( vlc_object_t *p_this )
 217 {
 218     demux_t *p_demux = (demux_t *)p_this;
 219     demux_sys_t *p_sys = p_demux->p_sys  ;
 220
 221     /* Cleanup the bitstream parser */
 222     ogg_sync_clear( &p_sys->oy );
 223
 224     Ogg_EndOfStream( p_demux );
 225
 226     free( p_sys );
 227 }
 228
 229 /*****************************************************************************
 230  * Demux: reads and demuxes data packets
 231  *****************************************************************************
 232  * Returns -1 in case of error, 0 in case of EOF, 1 otherwise
 233  *****************************************************************************/
 234 static int Demux( demux_t * p_demux )
 235 {
 236     demux_sys_t *p_sys = p_demux->p_sys;
 237     ogg_page    oggpage;
 238     ogg_packet  oggpacket;
 239     int         i_stream;
 240
 241
 242     if( p_sys->i_eos == p_sys->i_streams )
 243     {
 244         if( p_sys->i_eos )
 245         {
 246             msg_Dbg( p_demux, "end of a group of logical streams" );
 247             Ogg_EndOfStream( p_demux );
 248         }
 249
 250         if( Ogg_BeginningOfStream( p_demux ) != VLC_SUCCESS ) return 0;
 251         p_sys->i_eos = 0;
 252
 253         msg_Dbg( p_demux, "beginning of a group of logical streams" );
 254         es_out_Control( p_demux->out, ES_OUT_RESET_PCR );
 255     }
 256
 257     /*
 258      * Demux an ogg page from the stream
 259      */
 260     if( Ogg_ReadPage( p_demux, &oggpage ) != VLC_SUCCESS )
 261     {
 262         return 0; /* EOF */
 263     }
 264
 265     /* Test for End of Stream */
 266     if( ogg_page_eos( &oggpage ) ) p_sys->i_eos++;
 267
 268
 269     for( i_stream = 0; i_stream < p_sys->i_streams; i_stream++ )
 270     {
 271         logical_stream_t *p_stream = p_sys->pp_stream[i_stream];
 272
 273         if( ogg_stream_pagein( &p_stream->os, &oggpage ) != 0 )
 274             continue;
 275
 276         while( ogg_stream_packetout( &p_stream->os, &oggpacket ) > 0 )
 277         {
 278             /* Read info from any secondary header packets, if there are any */
 279             if( p_stream->secondary_header_packets > 0 )
 280             {
 281                 if( p_stream->fmt.i_codec == VLC_FOURCC( 't','h','e','o' ) &&
 282                         oggpacket.bytes >= 7 &&
 283                         ! strncmp( &oggpacket.packet[1], "theora", 6 ) )
 284                 {
 285                     Ogg_ReadTheoraHeader( p_stream, &oggpacket );
 286                     p_stream->secondary_header_packets = 0;
 287                 }
 288                 else if( p_stream->fmt.i_codec == VLC_FOURCC( 'v','o','r','b' ) &&
 289                         oggpacket.bytes >= 7 &&
 290                         ! strncmp( &oggpacket.packet[1], "vorbis", 6 ) )
 291                 {
 292                     Ogg_ReadVorbisHeader( p_stream, &oggpacket );
 293                     p_stream->secondary_header_packets = 0;
 294                 }
 295                 else if ( p_stream->fmt.i_codec == VLC_FOURCC( 'c','m','m','l' ) )
 296                 {
 297                     p_stream->secondary_header_packets = 0;
 298                 }
 299
 300                 p_stream->secondary_header_packets--;
 301             }
 302
 303             if( p_stream->b_reinit )
 304             {
 305                 /* If synchro is re-initialized we need to drop all the packets
 306                  * until we find a new dated one. */
 307                 Ogg_UpdatePCR( p_stream, &oggpacket );
 308
 309                 if( p_stream->i_pcr >= 0 )
 310                 {
 311                     p_stream->b_reinit = 0;
 312                 }
 313                 else
 314                 {
 315                     p_stream->i_interpolated_pcr = -1;
 316                     continue;
 317                 }
 318
 319                 /* An Ogg/vorbis packet contains an end date granulepos */
 320                 if( p_stream->fmt.i_codec == VLC_FOURCC( 'v','o','r','b' ) ||
 321                     p_stream->fmt.i_codec == VLC_FOURCC( 's','p','x',' ' ) ||
 322                     p_stream->fmt.i_codec == VLC_FOURCC( 'f','l','a','c' ) )
 323                 {
 324                     if( ogg_stream_packetout( &p_stream->os, &oggpacket ) > 0 )
 325                     {
 326                         Ogg_DecodePacket( p_demux, p_stream, &oggpacket );
 327                     }
 328                     else
 329                     {
 330                         es_out_Control( p_demux->out, ES_OUT_SET_PCR,
 331                                         p_stream->i_pcr );
 332                     }
 333                     continue;
 334                 }
 335             }
 336
 337             Ogg_DecodePacket( p_demux, p_stream, &oggpacket );
 338         }
 339         break;
 340     }
 341
 342     i_stream = 0; p_sys->i_pcr = -1;
 343     for( ; i_stream < p_sys->i_streams; i_stream++ )
 344     {
 345         logical_stream_t *p_stream = p_sys->pp_stream[i_stream];
 346
 347         if( p_stream->fmt.i_cat == SPU_ES )
 348             continue;
 349         if( p_stream->i_interpolated_pcr < 0 )
 350             continue;
 351
 352         if( p_sys->i_pcr < 0 || p_stream->i_interpolated_pcr < p_sys->i_pcr )
 353             p_sys->i_pcr = p_stream->i_interpolated_pcr;
 354     }
 355
 356     if( p_sys->i_pcr >= 0 )
 357     {
 358         es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_sys->i_pcr );
 359     }
 360
 361
 362     return 1;
 363 }
 364
 365 /*****************************************************************************
 366  * Control:
 367  *****************************************************************************/
 368 static int Control( demux_t *p_demux, int i_query, va_list args )
 369 {
 370     demux_sys_t *p_sys  = p_demux->p_sys;
 371     int64_t *pi64;
 372     int i;
 373
 374     switch( i_query )
 375     {
 376         case DEMUX_GET_TIME:
 377             pi64 = (int64_t*)va_arg( args, int64_t * );
 378             *pi64 = p_sys->i_pcr;
 379             return VLC_SUCCESS;
 380
 381         case DEMUX_SET_TIME:
 382             return VLC_EGENERIC;
 383
 384         case DEMUX_SET_POSITION:
 385             for( i = 0; i < p_sys->i_streams; i++ )
 386             {
 387                 logical_stream_t *p_stream = p_sys->pp_stream[i];
 388
 389                 /* we'll trash all the data until we find the next pcr */
 390                 p_stream->b_reinit = 1;
 391                 p_stream->i_pcr = -1;
 392                 p_stream->i_interpolated_pcr = -1;
 393                 ogg_stream_reset( &p_stream->os );
 394             }
 395             ogg_sync_reset( &p_sys->oy );
 396
 397         default:
 398             return demux2_vaControlHelper( p_demux->s, 0, -1, p_sys->i_bitrate,
 399                                            1, i_query, args );
 400     }
 401 }
 402
 403 /****************************************************************************
 404  * Ogg_ReadPage: Read a full Ogg page from the physical bitstream.
 405  ****************************************************************************
 406  * Returns VLC_SUCCESS if a page has been read. An error might happen if we
 407  * are at the end of stream.
 408  ****************************************************************************/
 409 static int Ogg_ReadPage( demux_t *p_demux, ogg_page *p_oggpage )
 410 {
 411     demux_sys_t *p_ogg = p_demux->p_sys  ;
 412     int i_read = 0;
 413     byte_t *p_buffer;
 414
 415     while( ogg_sync_pageout( &p_ogg->oy, p_oggpage ) != 1 )
 416     {
 417         p_buffer = ogg_sync_buffer( &p_ogg->oy, OGG_BLOCK_SIZE );
 418
 419         i_read = stream_Read( p_demux->s, p_buffer, OGG_BLOCK_SIZE );
 420         if( i_read <= 0 )
 421             return VLC_EGENERIC;
 422
 423         ogg_sync_wrote( &p_ogg->oy, i_read );
 424     }
 425
 426     return VLC_SUCCESS;
 427 }
 428
 429 /****************************************************************************
 430  * Ogg_UpdatePCR: update the PCR (90kHz program clock reference) for the
 431  *                current stream.
 432  ****************************************************************************/
 433 static void Ogg_UpdatePCR( logical_stream_t *p_stream,
 434                            ogg_packet *p_oggpacket )
 435 {
 436     /* Convert the granulepos into a pcr */
 437     if( p_oggpacket->granulepos >= 0 )
 438     {
 439         if( p_stream->fmt.i_codec != VLC_FOURCC( 't','h','e','o' ) )
 440         {
 441             p_stream->i_pcr = p_oggpacket->granulepos * I64C(1000000)
 442                               / p_stream->f_rate;
 443         }
 444         else
 445         {
 446             ogg_int64_t iframe = p_oggpacket->granulepos >>
 447               p_stream->i_theora_keyframe_granule_shift;
 448             ogg_int64_t pframe = p_oggpacket->granulepos -
 449               ( iframe << p_stream->i_theora_keyframe_granule_shift );
 450
 451             p_stream->i_pcr = ( iframe + pframe ) * I64C(1000000)
 452                               / p_stream->f_rate;
 453         }
 454
 455         p_stream->i_interpolated_pcr = p_stream->i_pcr;
 456     }
 457     else
 458     {
 459         p_stream->i_pcr = -1;
 460
 461         /* no granulepos available, try to interpolate the pcr.
 462          * If we can't then don't touch the old value. */
 463         if( p_stream->fmt.i_cat == VIDEO_ES )
 464             /* 1 frame per packet */
 465             p_stream->i_interpolated_pcr += (I64C(1000000) / p_stream->f_rate);
 466         else if( p_stream->fmt.i_bitrate )
 467             p_stream->i_interpolated_pcr +=
 468                 ( p_oggpacket->bytes * I64C(1000000) /
 469                   p_stream->fmt.i_bitrate / 8 );
 470     }
 471 }
 472
 473 /****************************************************************************
 474  * Ogg_DecodePacket: Decode an Ogg packet.
 475  ****************************************************************************/
 476 static void Ogg_DecodePacket( demux_t *p_demux,
 477                               logical_stream_t *p_stream,
 478                               ogg_packet *p_oggpacket )
 479 {
 480     block_t *p_block;
 481     vlc_bool_t b_selected;
 482     int i_header_len = 0;
 483     mtime_t i_pts = 0;
 484
 485     /* Sanity check */
 486     if( !p_oggpacket->bytes )
 487     {
 488         msg_Dbg( p_demux, "discarding 0 sized packet" );
 489         return;
 490     }
 491
 492     if( p_oggpacket->bytes >= 7 &&
 493         ! strncmp ( &p_oggpacket->packet[0], "Annodex", 7 ) )
 494     {
 495         /* it's an Annodex packet -- skip it (do nothing) */
 496         return;
 497     }
 498     else if( p_oggpacket->bytes >= 7 &&
 499         ! strncmp ( &p_oggpacket->packet[0], "AnxData", 7 ) )
 500     {
 501         /* it's an AnxData packet -- skip it (do nothing) */
 502         return;
 503     }
 504
 505     if( p_stream->b_force_backup )
 506     {
 507         ogg_packet *p_packet_backup;
 508         p_stream->i_packets_backup++;
 509         switch( p_stream->fmt.i_codec )
 510         {
 511         case VLC_FOURCC( 'v','o','r','b' ):
 512         case VLC_FOURCC( 's','p','x',' ' ):
 513         case VLC_FOURCC( 't','h','e','o' ):
 514           if( p_stream->i_packets_backup == 3 ) p_stream->b_force_backup = 0;
 515           break;
 516
 517         case VLC_FOURCC( 'f','l','a','c' ):
 518           if( p_stream->i_packets_backup == 1 ) return;
 519           else if( p_stream->i_packets_backup == 2 )
 520           {
 521               /* Parse the STREAMINFO metadata */
 522               bs_t s;
 523               bs_init( &s, p_oggpacket->packet, p_oggpacket->bytes );
 524               bs_read( &s, 1 );
 525               if( bs_read( &s, 7 ) == 0 )
 526               {
 527                   if( bs_read( &s, 24 ) >= 34 /*size STREAMINFO*/ )
 528                   {
 529                       bs_skip( &s, 80 );
 530                       p_stream->f_rate = p_stream->fmt.audio.i_rate =
 531                           bs_read( &s, 20 );
 532                       p_stream->fmt.audio.i_channels =
 533                           bs_read( &s, 3 ) + 1;
 534
 535                       msg_Dbg( p_demux, "FLAC header, channels: %i, rate: %i",
 536                                p_stream->fmt.audio.i_channels,
 537                                (int)p_stream->f_rate );
 538                   }
 539                   else
 540                   {
 541                       msg_Dbg( p_demux, "FLAC STREAMINFO metadata too short" );
 542                   }
 543
 544                   /* Store STREAMINFO for the decoder and packetizer */
 545                   p_stream->fmt.i_extra = p_oggpacket->bytes + 4;
 546                   p_stream->fmt.p_extra = malloc( p_stream->fmt.i_extra );
 547                   memcpy( p_stream->fmt.p_extra, "fLaC", 4);
 548                   memcpy( ((uint8_t *)p_stream->fmt.p_extra) + 4,
 549                           p_oggpacket->packet, p_oggpacket->bytes );
 550
 551                   /* Fake this as the last metadata block */
 552                   ((uint8_t*)p_stream->fmt.p_extra)[4] |= 0x80;
 553
 554                   p_stream->p_es = es_out_Add( p_demux->out,
 555                                                &p_stream->fmt );
 556               }
 557               else
 558               {
 559                   /* This ain't a STREAMINFO metadata */
 560                   msg_Dbg( p_demux, "Invalid FLAC STREAMINFO metadata" );
 561               }
 562               p_stream->b_force_backup = 0;
 563               p_stream->i_packets_backup = 0;
 564
 565               if( p_oggpacket->granulepos >= 0 )
 566                   Ogg_UpdatePCR( p_stream, p_oggpacket );
 567
 568               p_stream->i_previous_pcr = 0;
 569               return;
 570           }
 571           break;
 572
 573         default:
 574           p_stream->b_force_backup = 0;
 575           break;
 576         }
 577
 578         /* Backup the ogg packet (likely an header packet) */
 579         p_stream->p_packets_backup =
 580             realloc( p_stream->p_packets_backup, p_stream->i_packets_backup *
 581                      sizeof(ogg_packet) );
 582
 583         p_packet_backup =
 584             &p_stream->p_packets_backup[p_stream->i_packets_backup - 1];
 585
 586         p_packet_backup->bytes = p_oggpacket->bytes;
 587         p_packet_backup->granulepos = p_oggpacket->granulepos;
 588
 589         if( p_oggpacket->granulepos >= 0 )
 590         {
 591             /* Because of vorbis granulepos scheme we must set the pcr for the
 592              * 1st header packet so it doesn't get discarded in the
 593              * packetizer */
 594             Ogg_UpdatePCR( p_stream, p_oggpacket );
 595         }
 596
 597         p_packet_backup->packet = malloc( p_oggpacket->bytes );
 598         if( !p_packet_backup->packet ) return;
 599         memcpy( p_packet_backup->packet, p_oggpacket->packet,
 600                 p_oggpacket->bytes );
 601     }
 602
 603     /* Check the ES is selected */
 604     es_out_Control( p_demux->out, ES_OUT_GET_ES_STATE,
 605                     p_stream->p_es, &b_selected );
 606
 607     if( b_selected && !p_stream->b_activated )
 608     {
 609         p_stream->b_activated = VLC_TRUE;
 610
 611         /* Newly activated stream, feed the backup headers to the decoder */
 612         if( !p_stream->b_force_backup )
 613         {
 614             int i;
 615             for( i = 0; i < p_stream->i_packets_backup; i++ )
 616             {
 617                 /* Set correct starting date in header packets */
 618                 p_stream->p_packets_backup[i].granulepos =
 619                     p_stream->i_interpolated_pcr * p_stream->f_rate /
 620                     I64C(1000000);
 621
 622                 Ogg_DecodePacket( p_demux, p_stream,
 623                                   &p_stream->p_packets_backup[i] );
 624             }
 625         }
 626     }
 627
 628     /* Convert the pcr into a pts */
 629     if( p_stream->fmt.i_codec == VLC_FOURCC( 'v','o','r','b' ) ||
 630         p_stream->fmt.i_codec == VLC_FOURCC( 's','p','x',' ' ) ||
 631         p_stream->fmt.i_codec == VLC_FOURCC( 'f','l','a','c' ) )
 632     {
 633         if( p_stream->i_pcr >= 0 )
 634         {
 635             /* This is for streams where the granulepos of the header packets
 636              * doesn't match these of the data packets (eg. ogg web radios). */
 637             if( p_stream->i_previous_pcr == 0 &&
 638                 p_stream->i_pcr  > 3 * DEFAULT_PTS_DELAY )
 639             {
 640                 es_out_Control( p_demux->out, ES_OUT_RESET_PCR );
 641
 642                 /* Call the pace control */
 643                 es_out_Control( p_demux->out, ES_OUT_SET_PCR,
 644                                 p_stream->i_pcr );
 645             }
 646
 647             p_stream->i_previous_pcr = p_stream->i_pcr;
 648
 649             /* The granulepos is the end date of the sample */
 650             i_pts =  p_stream->i_pcr;
 651         }
 652     }
 653
 654     /* Convert the granulepos into the next pcr */
 655     Ogg_UpdatePCR( p_stream, p_oggpacket );
 656
 657     if( p_stream->i_pcr >= 0 )
 658     {
 659         /* This is for streams where the granulepos of the header packets
 660          * doesn't match these of the data packets (eg. ogg web radios). */
 661         if( p_stream->i_previous_pcr == 0 &&
 662             p_stream->i_pcr  > 3 * DEFAULT_PTS_DELAY )
 663         {
 664             es_out_Control( p_demux->out, ES_OUT_RESET_PCR );
 665
 666             /* Call the pace control */
 667             es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_stream->i_pcr );
 668         }
 669     }
 670
 671     if( p_stream->fmt.i_codec != VLC_FOURCC( 'v','o','r','b' ) &&
 672         p_stream->fmt.i_codec != VLC_FOURCC( 's','p','x',' ' ) &&
 673         p_stream->fmt.i_codec != VLC_FOURCC( 'f','l','a','c' ) &&
 674         p_stream->i_pcr >= 0 )
 675     {
 676         p_stream->i_previous_pcr = p_stream->i_pcr;
 677
 678         /* The granulepos is the start date of the sample */
 679         i_pts = p_stream->i_pcr;
 680     }
 681
 682     if( !b_selected )
 683     {
 684         /* This stream isn't currently selected so we don't need to decode it,
 685          * but we did need to store its pcr as it might be selected later on */
 686         p_stream->b_activated = VLC_FALSE;
 687         return;
 688     }
 689
 690     if( !( p_block = block_New( p_demux, p_oggpacket->bytes ) ) ) return;
 691
 692     if( p_stream->fmt.i_cat == AUDIO_ES )
 693         p_block->i_dts = p_block->i_pts = i_pts;
 694     else if( p_stream->fmt.i_cat == SPU_ES )
 695     {
 696         p_block->i_dts = p_block->i_pts = i_pts;
 697         p_block->i_length = 0;
 698     }
 699     else if( p_stream->fmt.i_codec == VLC_FOURCC( 't','h','e','o' ) )
 700         p_block->i_dts = p_block->i_pts = i_pts;
 701     else
 702     {
 703         p_block->i_dts = i_pts;
 704         p_block->i_pts = 0;
 705     }
 706
 707     if( p_stream->fmt.i_codec != VLC_FOURCC( 'v','o','r','b' ) &&
 708         p_stream->fmt.i_codec != VLC_FOURCC( 's','p','x',' ' ) &&
 709         p_stream->fmt.i_codec != VLC_FOURCC( 'f','l','a','c' ) &&
 710         p_stream->fmt.i_codec != VLC_FOURCC( 't','a','r','k' ) &&
 711         p_stream->fmt.i_codec != VLC_FOURCC( 't','h','e','o' ) &&
 712         p_stream->fmt.i_codec != VLC_FOURCC( 'c','m','m','l' ) )
 713     {
 714         /* We remove the header from the packet */
 715         i_header_len = (*p_oggpacket->packet & PACKET_LEN_BITS01) >> 6;
 716         i_header_len |= (*p_oggpacket->packet & PACKET_LEN_BITS2) << 1;
 717
 718         if( p_stream->fmt.i_codec == VLC_FOURCC( 's','u','b','t' ))
 719         {
 720             /* But with subtitles we need to retrieve the duration first */
 721             int i, lenbytes = 0;
 722
 723             if( i_header_len > 0 && p_oggpacket->bytes >= i_header_len + 1 )
 724             {
 725                 for( i = 0, lenbytes = 0; i < i_header_len; i++ )
 726                 {
 727                     lenbytes = lenbytes << 8;
 728                     lenbytes += *(p_oggpacket->packet + i_header_len - i);
 729                 }
 730             }
 731             if( p_oggpacket->bytes - 1 - i_header_len > 2 ||
 732                 ( p_oggpacket->packet[i_header_len + 1] != ' ' &&
 733                   p_oggpacket->packet[i_header_len + 1] != 0 &&
 734                   p_oggpacket->packet[i_header_len + 1] != '\n' &&
 735                   p_oggpacket->packet[i_header_len + 1] != '\r' ) )
 736             {
 737                 p_block->i_length = (mtime_t)lenbytes * 1000;
 738             }
 739         }
 740
 741         i_header_len++;
 742         p_block->i_buffer -= i_header_len;
 743     }
 744
 745     if( p_stream->fmt.i_codec == VLC_FOURCC( 't','a','r','k' ) )
 746     {
 747         /* FIXME: the biggest hack I've ever done */
 748         msg_Warn( p_demux, "tarkin pts: "I64Fd", granule: "I64Fd,
 749                   p_block->i_pts, p_block->i_dts );
 750         msleep(10000);
 751     }
 752
 753     memcpy( p_block->p_buffer, p_oggpacket->packet + i_header_len,
 754             p_oggpacket->bytes - i_header_len );
 755
 756     es_out_Send( p_demux->out, p_stream->p_es, p_block );
 757 }
 758
 759 /****************************************************************************
 760  * Ogg_FindLogicalStreams: Find the logical streams embedded in the physical
 761  *                         stream and fill p_ogg.
 762  *****************************************************************************
 763  * The initial page of a logical stream is marked as a 'bos' page.
 764  * Furthermore, the Ogg specification mandates that grouped bitstreams begin
 765  * together and all of the initial pages must appear before any data pages.
 766  *
 767  * On success this function returns VLC_SUCCESS.
 768  ****************************************************************************/
 769 static int Ogg_FindLogicalStreams( demux_t *p_demux )
 770 {
 771     demux_sys_t *p_ogg = p_demux->p_sys  ;
 772     ogg_packet oggpacket;
 773     ogg_page oggpage;
 774     int i_stream;
 775
 776 #define p_stream p_ogg->pp_stream[p_ogg->i_streams - 1]
 777
 778     while( Ogg_ReadPage( p_demux, &oggpage ) == VLC_SUCCESS )
 779     {
 780         if( ogg_page_bos( &oggpage ) )
 781         {
 782
 783             /* All is wonderful in our fine fine little world.
 784              * We found the beginning of our first logical stream. */
 785             while( ogg_page_bos( &oggpage ) )
 786             {
 787                 p_ogg->i_streams++;
 788                 p_ogg->pp_stream =
 789                     realloc( p_ogg->pp_stream, p_ogg->i_streams *
 790                              sizeof(logical_stream_t *) );
 791
 792                 p_stream = malloc( sizeof(logical_stream_t) );
 793                 memset( p_stream, 0, sizeof(logical_stream_t) );
 794
 795                 es_format_Init( &p_stream->fmt, 0, 0 );
 796                 p_stream->b_activated = VLC_TRUE;
 797
 798                 /* Setup the logical stream */
 799                 p_stream->i_serial_no = ogg_page_serialno( &oggpage );
 800                 ogg_stream_init( &p_stream->os, p_stream->i_serial_no );
 801
 802                 /* Extract the initial header from the first page and verify
 803                  * the codec type of tis Ogg bitstream */
 804                 if( ogg_stream_pagein( &p_stream->os, &oggpage ) < 0 )
 805                 {
 806                     /* error. stream version mismatch perhaps */
 807                     msg_Err( p_demux, "error reading first page of "
 808                              "Ogg bitstream data" );
 809                     return VLC_EGENERIC;
 810                 }
 811
 812                 /* FIXME: check return value */
 813                 ogg_stream_packetpeek( &p_stream->os, &oggpacket );
 814
 815                 /* Check for Vorbis header */
 816                 if( oggpacket.bytes >= 7 &&
 817                     ! strncmp( &oggpacket.packet[1], "vorbis", 6 ) )
 818                 {
 819                     Ogg_ReadVorbisHeader( p_stream, &oggpacket );
 820                     msg_Dbg( p_demux, "found vorbis header" );
 821                 }
 822                 /* Check for Speex header */
 823                 else if( oggpacket.bytes >= 7 &&
 824                     ! strncmp( &oggpacket.packet[0], "Speex", 5 ) )
 825                 {
 826                     oggpack_buffer opb;
 827
 828                     p_stream->fmt.i_cat = AUDIO_ES;
 829                     p_stream->fmt.i_codec = VLC_FOURCC( 's','p','x',' ' );
 830
 831                     /* Signal that we want to keep a backup of the vorbis
 832                      * stream headers. They will be used when switching between
 833                      * audio streams. */
 834                     p_stream->b_force_backup = 1;
 835
 836                     /* Cheat and get additionnal info ;) */
 837                     oggpack_readinit( &opb, oggpacket.packet, oggpacket.bytes);
 838                     oggpack_adv( &opb, 224 );
 839                     oggpack_adv( &opb, 32 ); /* speex_version_id */
 840                     oggpack_adv( &opb, 32 ); /* header_size */
 841                     p_stream->f_rate = p_stream->fmt.audio.i_rate =
 842                         oggpack_read( &opb, 32 );
 843                     oggpack_adv( &opb, 32 ); /* mode */
 844                     oggpack_adv( &opb, 32 ); /* mode_bitstream_version */
 845                     p_stream->fmt.audio.i_channels = oggpack_read( &opb, 32 );
 846                     p_stream->fmt.i_bitrate = oggpack_read( &opb, 32 );
 847
 848                     msg_Dbg( p_demux, "found speex header, channels: %i, "
 849                              "rate: %i,  bitrate: %i",
 850                              p_stream->fmt.audio.i_channels,
 851                              (int)p_stream->f_rate, p_stream->fmt.i_bitrate );
 852                 }
 853                 /* Check for Flac header */
 854                 else if( oggpacket.bytes >= 4 &&
 855                     ! strncmp( &oggpacket.packet[0], "fLaC", 4 ) )
 856                 {
 857                     msg_Dbg( p_demux, "found FLAC header" );
 858
 859                     /* Grrrr!!!! Did they really have to put all the
 860                      * important info in the second header packet!!!
 861                      * (STREAMINFO metadata is in the following packet) */
 862                     p_stream->b_force_backup = 1;
 863
 864                     p_stream->fmt.i_cat = AUDIO_ES;
 865                     p_stream->fmt.i_codec = VLC_FOURCC( 'f','l','a','c' );
 866                 }
 867                 /* Check for Theora header */
 868                 else if( oggpacket.bytes >= 7 &&
 869                          ! strncmp( &oggpacket.packet[1], "theora", 6 ) )
 870                 {
 871                     Ogg_ReadTheoraHeader( p_stream, &oggpacket );
 872
 873                     msg_Dbg( p_demux,
 874                              "found theora header, bitrate: %i, rate: %f",
 875                              p_stream->fmt.i_bitrate, p_stream->f_rate );
 876                 }
 877                 /* Check for Tarkin header */
 878                 else if( oggpacket.bytes >= 7 &&
 879                          ! strncmp( &oggpacket.packet[1], "tarkin", 6 ) )
 880                 {
 881                     oggpack_buffer opb;
 882
 883                     msg_Dbg( p_demux, "found tarkin header" );
 884                     p_stream->fmt.i_cat = VIDEO_ES;
 885                     p_stream->fmt.i_codec = VLC_FOURCC( 't','a','r','k' );
 886
 887                     /* Cheat and get additionnal info ;) */
 888                     oggpack_readinit( &opb, oggpacket.packet, oggpacket.bytes);
 889                     oggpack_adv( &opb, 88 );
 890                     oggpack_adv( &opb, 104 );
 891                     p_stream->fmt.i_bitrate = oggpack_read( &opb, 32 );
 892                     p_stream->f_rate = 2; /* FIXME */
 893                     msg_Dbg( p_demux,
 894                              "found tarkin header, bitrate: %i, rate: %f",
 895                              p_stream->fmt.i_bitrate, p_stream->f_rate );
 896                 }
 897                 /* Check for Annodex header */
 898                 else if( oggpacket.bytes >= 7 &&
 899                          ! strncmp( &oggpacket.packet[0], "Annodex", 7 ) )
 900                 {
 901                     Ogg_ReadAnnodexHeader( VLC_OBJECT(p_demux), p_stream,
 902                                            &oggpacket );
 903                     /* kill annodex track */
 904                     free( p_stream );
 905                     p_ogg->i_streams--;
 906                 }
 907                 /* Check for Annodex header */
 908                 else if( oggpacket.bytes >= 7 &&
 909                          ! strncmp( &oggpacket.packet[0], "AnxData", 7 ) )
 910                 {
 911                     Ogg_ReadAnnodexHeader( VLC_OBJECT(p_demux), p_stream,
 912                                            &oggpacket );
 913                 }
 914                 else if( oggpacket.bytes >= 142 &&
 915                          !strncmp( &oggpacket.packet[1],
 916                                    "Direct Show Samples embedded in Ogg", 35 ))
 917                 {
 918                     /* Old header type */
 919
 920                     /* Check for video header (old format) */
 921                     if( GetDWLE((oggpacket.packet+96)) == 0x05589f80 &&
 922                         oggpacket.bytes >= 184 )
 923                     {
 924                         p_stream->fmt.i_cat = VIDEO_ES;
 925                         p_stream->fmt.i_codec =
 926                             VLC_FOURCC( oggpacket.packet[68],
 927                                         oggpacket.packet[69],
 928                                         oggpacket.packet[70],
 929                                         oggpacket.packet[71] );
 930                         msg_Dbg( p_demux, "found video header of type: %.4s",
 931                                  (char *)&p_stream->fmt.i_codec );
 932
 933                         p_stream->f_rate = 10000000.0 /
 934                             GetQWLE((oggpacket.packet+164));
 935                         p_stream->fmt.video.i_bits_per_pixel =
 936                             GetWLE((oggpacket.packet+182));
 937                         if( !p_stream->fmt.video.i_bits_per_pixel )
 938                             /* hack, FIXME */
 939                             p_stream->fmt.video.i_bits_per_pixel = 24;
 940                         p_stream->fmt.video.i_width =
 941                             GetDWLE((oggpacket.packet+176));
 942                         p_stream->fmt.video.i_height =
 943                             GetDWLE((oggpacket.packet+180));
 944
 945                         msg_Dbg( p_demux,
 946                                  "fps: %f, width:%i; height:%i, bitcount:%i",
 947                                  p_stream->f_rate,
 948                                  p_stream->fmt.video.i_width,
 949                                  p_stream->fmt.video.i_height,
 950                                  p_stream->fmt.video.i_bits_per_pixel);
 951
 952                     }
 953                     /* Check for audio header (old format) */
 954                     else if( GetDWLE((oggpacket.packet+96)) == 0x05589F81 )
 955                     {
 956                         unsigned int i_extra_size;
 957                         unsigned int i_format_tag;
 958
 959                         p_stream->fmt.i_cat = AUDIO_ES;
 960
 961                         i_extra_size = GetWLE((oggpacket.packet+140));
 962                         if( i_extra_size )
 963                         {
 964                             p_stream->fmt.i_extra = i_extra_size;
 965                             p_stream->fmt.p_extra = malloc( i_extra_size );
 966                             memcpy( p_stream->fmt.p_extra,
 967                                     oggpacket.packet + 142, i_extra_size );
 968                         }
 969
 970                         i_format_tag = GetWLE((oggpacket.packet+124));
 971                         p_stream->fmt.audio.i_channels =
 972                             GetWLE((oggpacket.packet+126));
 973                         p_stream->f_rate = p_stream->fmt.audio.i_rate =
 974                             GetDWLE((oggpacket.packet+128));
 975                         p_stream->fmt.i_bitrate =
 976                             GetDWLE((oggpacket.packet+132)) * 8;
 977                         p_stream->fmt.audio.i_blockalign =
 978                             GetWLE((oggpacket.packet+136));
 979                         p_stream->fmt.audio.i_bitspersample =
 980                             GetWLE((oggpacket.packet+138));
 981
 982                         switch( i_format_tag )
 983                         {
 984                         case WAVE_FORMAT_PCM:
 985                             p_stream->fmt.i_codec =
 986                                 VLC_FOURCC( 'a', 'r', 'a', 'w' );
 987                             break;
 988                         case WAVE_FORMAT_MPEG:
 989                         case WAVE_FORMAT_MPEGLAYER3:
 990                             p_stream->fmt.i_codec =
 991                                 VLC_FOURCC( 'm', 'p', 'g', 'a' );
 992                             break;
 993                         case WAVE_FORMAT_A52:
 994                             p_stream->fmt.i_codec =
 995                                 VLC_FOURCC( 'a', '5', '2', ' ' );
 996                             break;
 997                         case WAVE_FORMAT_WMA1:
 998                             p_stream->fmt.i_codec =
 999                                 VLC_FOURCC( 'w', 'm', 'a', '1' );
1000                             break;
1001                         case WAVE_FORMAT_WMA2:
1002                             p_stream->fmt.i_codec =
1003                                 VLC_FOURCC( 'w', 'm', 'a', '2' );
1004                             break;
1005                         default:
1006                             p_stream->fmt.i_codec = VLC_FOURCC( 'm', 's',
1007                                 ( i_format_tag >> 8 ) & 0xff,
1008                                 i_format_tag & 0xff );
1009                         }
1010
1011                         msg_Dbg( p_demux, "found audio header of type: %.4s",
1012                                  (char *)&p_stream->fmt.i_codec );
1013                         msg_Dbg( p_demux, "audio:0x%4.4x channels:%d %dHz "
1014                                  "%dbits/sample %dkb/s",
1015                                  i_format_tag,
1016                                  p_stream->fmt.audio.i_channels,
1017                                  p_stream->fmt.audio.i_rate,
1018                                  p_stream->fmt.audio.i_bitspersample,
1019                                  p_stream->fmt.i_bitrate / 1024 );
1020
1021                     }
1022                     else
1023                     {
1024                         msg_Dbg( p_demux, "stream %d has an old header "
1025                             "but is of an unknown type", p_ogg->i_streams-1 );
1026                         free( p_stream );
1027                         p_ogg->i_streams--;
1028                     }
1029                 }
1030                 else if( (*oggpacket.packet & PACKET_TYPE_BITS )
1031                          == PACKET_TYPE_HEADER &&
1032                          oggpacket.bytes >= (int)sizeof(stream_header)+1 )
1033                 {
1034                     stream_header *st = (stream_header *)(oggpacket.packet+1);
1035
1036                     /* Check for video header (new format) */
1037                     if( !strncmp( st->streamtype, "video", 5 ) )
1038                     {
1039                         p_stream->fmt.i_cat = VIDEO_ES;
1040
1041                         /* We need to get rid of the header packet */
1042                         ogg_stream_packetout( &p_stream->os, &oggpacket );
1043
1044                         p_stream->fmt.i_codec =
1045                             VLC_FOURCC( st->subtype[0], st->subtype[1],
1046                                         st->subtype[2], st->subtype[3] );
1047                         msg_Dbg( p_demux, "found video header of type: %.4s",
1048                                  (char *)&p_stream->fmt.i_codec );
1049
1050                         p_stream->f_rate = 10000000.0 /
1051                             GetQWLE(&st->time_unit);
1052                         p_stream->fmt.video.i_bits_per_pixel =
1053                             GetWLE(&st->bits_per_sample);
1054                         p_stream->fmt.video.i_width =
1055                             GetDWLE(&st->sh.video.width);
1056                         p_stream->fmt.video.i_height =
1057                             GetDWLE(&st->sh.video.height);
1058
1059                         msg_Dbg( p_demux,
1060                                  "fps: %f, width:%i; height:%i, bitcount:%i",
1061                                  p_stream->f_rate,
1062                                  p_stream->fmt.video.i_width,
1063                                  p_stream->fmt.video.i_height,
1064                                  p_stream->fmt.video.i_bits_per_pixel );
1065                     }
1066                     /* Check for audio header (new format) */
1067                     else if( !strncmp( st->streamtype, "audio", 5 ) )
1068                     {
1069                         char p_buffer[5];
1070                         int i_format_tag;
1071
1072                         p_stream->fmt.i_cat = AUDIO_ES;
1073
1074                         /* We need to get rid of the header packet */
1075                         ogg_stream_packetout( &p_stream->os, &oggpacket );
1076
1077                         memcpy( p_buffer, st->subtype, 4 );
1078                         p_buffer[4] = '\0';
1079                         i_format_tag = strtol(p_buffer,NULL,16);
1080                         p_stream->fmt.audio.i_channels =
1081                             GetWLE(&st->sh.audio.channels);
1082                         p_stream->f_rate = p_stream->fmt.audio.i_rate =
1083                             GetQWLE(&st->samples_per_unit);
1084                         p_stream->fmt.i_bitrate =
1085                             GetDWLE(&st->sh.audio.avgbytespersec) * 8;
1086                         p_stream->fmt.audio.i_blockalign =
1087                             GetWLE(&st->sh.audio.blockalign);
1088                         p_stream->fmt.audio.i_bitspersample =
1089                             GetWLE(&st->bits_per_sample);
1090
1091                         switch( i_format_tag )
1092                         {
1093                         case WAVE_FORMAT_PCM:
1094                             p_stream->fmt.i_codec =
1095                                 VLC_FOURCC( 'a', 'r', 'a', 'w' );
1096                             break;
1097                         case WAVE_FORMAT_MPEG:
1098                         case WAVE_FORMAT_MPEGLAYER3:
1099                             p_stream->fmt.i_codec =
1100                                 VLC_FOURCC( 'm', 'p', 'g', 'a' );
1101                             break;
1102                         case WAVE_FORMAT_A52:
1103                             p_stream->fmt.i_codec =
1104                                 VLC_FOURCC( 'a', '5', '2', ' ' );
1105                             break;
1106                         case WAVE_FORMAT_WMA1:
1107                             p_stream->fmt.i_codec =
1108                                 VLC_FOURCC( 'w', 'm', 'a', '1' );
1109                             break;
1110                         case WAVE_FORMAT_WMA2:
1111                             p_stream->fmt.i_codec =
1112                                 VLC_FOURCC( 'w', 'm', 'a', '2' );
1113                             break;
1114                         default:
1115                             p_stream->fmt.i_codec = VLC_FOURCC( 'm', 's',
1116                                 ( i_format_tag >> 8 ) & 0xff,
1117                                 i_format_tag & 0xff );
1118                         }
1119
1120                         msg_Dbg( p_demux, "found audio header of type: %.4s",
1121                                  (char *)&p_stream->fmt.i_codec );
1122                         msg_Dbg( p_demux, "audio:0x%4.4x channels:%d %dHz "
1123                                  "%dbits/sample %dkb/s",
1124                                  i_format_tag,
1125                                  p_stream->fmt.audio.i_channels,
1126                                  p_stream->fmt.audio.i_rate,
1127                                  p_stream->fmt.audio.i_bitspersample,
1128                                  p_stream->fmt.i_bitrate / 1024 );
1129                     }
1130                     /* Check for text (subtitles) header */
1131                     else if( !strncmp(st->streamtype, "text", 4) )
1132                     {
1133                         /* We need to get rid of the header packet */
1134                         ogg_stream_packetout( &p_stream->os, &oggpacket );
1135
1136                         msg_Dbg( p_demux, "found text subtitles header" );
1137                         p_stream->fmt.i_cat = SPU_ES;
1138                         p_stream->fmt.i_codec = VLC_FOURCC('s','u','b','t');
1139                         p_stream->f_rate = 1000; /* granulepos is in milisec */
1140                     }
1141                     else
1142                     {
1143                         msg_Dbg( p_demux, "stream %d has a header marker "
1144                             "but is of an unknown type", p_ogg->i_streams-1 );
1145                         free( p_stream );
1146                         p_ogg->i_streams--;
1147                     }
1148                 }
1149                 else
1150                 {
1151                     msg_Dbg( p_demux, "stream %d is of unknown type",
1152                              p_ogg->i_streams-1 );
1153                     free( p_stream );
1154                     p_ogg->i_streams--;
1155                 }
1156
1157                 if( Ogg_ReadPage( p_demux, &oggpage ) != VLC_SUCCESS )
1158                     return VLC_EGENERIC;
1159             }
1160
1161             /* This is the first data page, which means we are now finished
1162              * with the initial pages. We just need to store it in the relevant
1163              * bitstream. */
1164             for( i_stream = 0; i_stream < p_ogg->i_streams; i_stream++ )
1165             {
1166                 if( ogg_stream_pagein( &p_ogg->pp_stream[i_stream]->os,
1167                                        &oggpage ) == 0 )
1168                 {
1169                     break;
1170                 }
1171             }
1172
1173             return VLC_SUCCESS;
1174         }
1175     }
1176 #undef p_stream
1177
1178     return VLC_EGENERIC;
1179 }
1180
1181 /****************************************************************************
1182  * Ogg_BeginningOfStream: Look for Beginning of Stream ogg pages and add
1183  *                        Elementary streams.
1184  ****************************************************************************/
1185 static int Ogg_BeginningOfStream( demux_t *p_demux )
1186 {
1187     demux_sys_t *p_ogg = p_demux->p_sys  ;
1188     int i_stream;
1189
1190     /* Find the logical streams embedded in the physical stream and
1191      * initialize our p_ogg structure. */
1192     if( Ogg_FindLogicalStreams( p_demux ) != VLC_SUCCESS )
1193     {
1194         msg_Warn( p_demux, "couldn't find any ogg logical stream" );
1195         return VLC_EGENERIC;
1196     }
1197
1198     p_ogg->i_bitrate = 0;
1199
1200     for( i_stream = 0 ; i_stream < p_ogg->i_streams; i_stream++ )
1201     {
1202 #define p_stream p_ogg->pp_stream[i_stream]
1203         if( p_stream->fmt.i_codec != VLC_FOURCC('f','l','a','c') )
1204             p_stream->p_es = es_out_Add( p_demux->out, &p_stream->fmt );
1205
1206         if( p_stream->fmt.i_codec == VLC_FOURCC('c','m','m','l') )
1207         {
1208             /* Set the CMML stream active */
1209             es_out_Control( p_demux->out, ES_OUT_SET_ES,
1210                             p_stream->p_es );
1211         }
1212
1213         p_ogg->i_bitrate += p_stream->fmt.i_bitrate;
1214
1215         p_stream->i_pcr = p_stream->i_previous_pcr =
1216             p_stream->i_interpolated_pcr = -1;
1217         p_stream->b_reinit = 0;
1218 #undef p_stream
1219     }
1220
1221     return VLC_SUCCESS;
1222 }
1223
1224 /****************************************************************************
1225  * Ogg_EndOfStream: clean up the ES when an End of Stream is detected.
1226  ****************************************************************************/
1227 static void Ogg_EndOfStream( demux_t *p_demux )
1228 {
1229     demux_sys_t *p_ogg = p_demux->p_sys  ;
1230     int i_stream, j;
1231
1232 #define p_stream p_ogg->pp_stream[i_stream]
1233     for( i_stream = 0 ; i_stream < p_ogg->i_streams; i_stream++ )
1234     {
1235         if( p_stream->p_es )
1236             es_out_Del( p_demux->out, p_stream->p_es );
1237
1238         p_ogg->i_bitrate -= p_stream->fmt.i_bitrate;
1239
1240         ogg_stream_clear( &p_ogg->pp_stream[i_stream]->os );
1241         for( j = 0; j < p_ogg->pp_stream[i_stream]->i_packets_backup; j++ )
1242         {
1243             free( p_ogg->pp_stream[i_stream]->p_packets_backup[j].packet );
1244         }
1245         if( p_ogg->pp_stream[i_stream]->p_packets_backup)
1246             free( p_ogg->pp_stream[i_stream]->p_packets_backup );
1247
1248         es_format_Clean( &p_stream->fmt );
1249
1250         free( p_ogg->pp_stream[i_stream] );
1251     }
1252 #undef p_stream
1253
1254     /* Reinit p_ogg */
1255     if( p_ogg->pp_stream ) free( p_ogg->pp_stream );
1256     p_ogg->pp_stream = NULL;
1257     p_ogg->i_streams = 0;
1258 }
1259
1260 static void Ogg_ReadTheoraHeader( logical_stream_t *p_stream,
1261                                   ogg_packet *p_oggpacket )
1262 {
1263     bs_t bitstream;
1264     int i_fps_numerator;
1265     int i_fps_denominator;
1266     int i_keyframe_frequency_force;
1267
1268     p_stream->fmt.i_cat = VIDEO_ES;
1269     p_stream->fmt.i_codec = VLC_FOURCC( 't','h','e','o' );
1270
1271     /* Signal that we want to keep a backup of the vorbis
1272      * stream headers. They will be used when switching between
1273      * audio streams. */
1274     p_stream->b_force_backup = 1;
1275
1276     /* Cheat and get additionnal info ;) */
1277     bs_init( &bitstream, p_oggpacket->packet, p_oggpacket->bytes );
1278     bs_skip( &bitstream, 56 );
1279     bs_read( &bitstream, 8 ); /* major version num */
1280     bs_read( &bitstream, 8 ); /* minor version num */
1281     bs_read( &bitstream, 8 ); /* subminor version num */
1282     bs_read( &bitstream, 16 ) /*<< 4*/; /* width */
1283     bs_read( &bitstream, 16 ) /*<< 4*/; /* height */
1284     bs_read( &bitstream, 24 ); /* frame width */
1285     bs_read( &bitstream, 24 ); /* frame height */
1286     bs_read( &bitstream, 8 ); /* x offset */
1287     bs_read( &bitstream, 8 ); /* y offset */
1288
1289     i_fps_numerator = bs_read( &bitstream, 32 );
1290     i_fps_denominator = bs_read( &bitstream, 32 );
1291     bs_read( &bitstream, 24 ); /* aspect_numerator */
1292     bs_read( &bitstream, 24 ); /* aspect_denominator */
1293     i_keyframe_frequency_force = 1 << bs_read( &bitstream, 5 );
1294     bs_read( &bitstream, 8 ); /* colorspace */
1295     p_stream->fmt.i_bitrate = bs_read( &bitstream, 24 );
1296     bs_read( &bitstream, 6 ); /* quality */
1297
1298     /* granule_shift = i_log( frequency_force -1 ) */
1299     p_stream->i_theora_keyframe_granule_shift = 0;
1300     i_keyframe_frequency_force--;
1301     while( i_keyframe_frequency_force )
1302     {
1303         p_stream->i_theora_keyframe_granule_shift++;
1304         i_keyframe_frequency_force >>= 1;
1305     }
1306
1307     p_stream->f_rate = ((float)i_fps_numerator) / i_fps_denominator;
1308
1309     /* Save this data in p_extra for ffmpeg */
1310     p_stream->fmt.i_extra = p_oggpacket->bytes;
1311     p_stream->fmt.p_extra = malloc( p_oggpacket->bytes );
1312     memcpy( p_stream->fmt.p_extra, p_oggpacket->packet, p_oggpacket->bytes );
1313
1314 }
1315
1316 static void Ogg_ReadVorbisHeader( logical_stream_t *p_stream,
1317                                   ogg_packet *p_oggpacket )
1318 {
1319     oggpack_buffer opb;
1320
1321     p_stream->fmt.i_cat = AUDIO_ES;
1322     p_stream->fmt.i_codec = VLC_FOURCC( 'v','o','r','b' );
1323
1324     /* Signal that we want to keep a backup of the vorbis
1325      * stream headers. They will be used when switching between
1326      * audio streams. */
1327     p_stream->b_force_backup = 1;
1328
1329     /* Cheat and get additionnal info ;) */
1330     oggpack_readinit( &opb, p_oggpacket->packet, p_oggpacket->bytes);
1331     oggpack_adv( &opb, 88 );
1332     p_stream->fmt.audio.i_channels = oggpack_read( &opb, 8 );
1333     p_stream->f_rate = p_stream->fmt.audio.i_rate =
1334         oggpack_read( &opb, 32 );
1335     oggpack_adv( &opb, 32 );
1336     p_stream->fmt.i_bitrate = oggpack_read( &opb, 32 );
1337 }
1338
1339 static void Ogg_ReadAnnodexHeader( vlc_object_t *p_this,
1340                                    logical_stream_t *p_stream,
1341                                    ogg_packet *p_oggpacket )
1342 {
1343     if( ! strncmp( &p_oggpacket->packet[0], "Annodex", 7 ) )
1344     {
1345         oggpack_buffer opb;
1346
1347         uint16_t major_version;
1348         uint16_t minor_version;
1349         uint64_t timebase_numerator;
1350         uint64_t timebase_denominator;
1351
1352         Ogg_ReadTheoraHeader( p_stream, p_oggpacket );
1353
1354         oggpack_readinit( &opb, p_oggpacket->packet, p_oggpacket->bytes);
1355         oggpack_adv( &opb, 8*8 ); /* "Annodex\0" header */
1356         major_version = oggpack_read( &opb, 2*8 ); /* major version */
1357         minor_version = oggpack_read( &opb, 2*8 ); /* minor version */
1358         timebase_numerator = GetQWLE( &p_oggpacket->packet[16] );
1359         timebase_denominator = GetQWLE( &p_oggpacket->packet[24] );
1360     }
1361     else if( ! strncmp( &p_oggpacket->packet[0], "AnxData", 7 ) )
1362     {
1363         uint64_t granule_rate_numerator;
1364         uint64_t granule_rate_denominator;
1365         char content_type_string[1024];
1366
1367         /* Read in Annodex header fields */
1368
1369         granule_rate_numerator = GetQWLE( &p_oggpacket->packet[8] );
1370         granule_rate_denominator = GetQWLE( &p_oggpacket->packet[16] );
1371         p_stream->secondary_header_packets =
1372             GetDWLE( &p_oggpacket->packet[24] );
1373
1374         msg_Dbg( p_this, "anxdata packet info: %qd/%qd, %d",
1375                  granule_rate_numerator, granule_rate_denominator,
1376                  p_stream->secondary_header_packets);
1377
1378         /* we are guaranteed that the first header field will be
1379          * the content-type (by the Annodex standard) */
1380         sscanf( &p_oggpacket->packet[28], "Content-Type: %1024s\r\n",
1381                 content_type_string );
1382
1383         p_stream->f_rate = (float) granule_rate_numerator /
1384             (float) granule_rate_denominator;
1385
1386         /* What type of file do we have?
1387          * strcmp is safe to use here because we've extracted
1388          * content_type_string from the stream manually */
1389         if( !strncmp(content_type_string, "audio/x-wav", 11) )
1390         {
1391             /* n.b. WAVs are unsupported right now */
1392             p_stream->fmt.i_cat = UNKNOWN_ES;
1393         }
1394         else if( !strncmp(content_type_string, "audio/x-vorbis", 14) )
1395         {
1396             p_stream->fmt.i_cat = AUDIO_ES;
1397             p_stream->fmt.i_codec = VLC_FOURCC( 'v','o','r','b' );
1398
1399             p_stream->b_force_backup = 1;
1400         }
1401         else if( !strncmp(content_type_string, "video/x-theora", 14) )
1402         {
1403             p_stream->fmt.i_cat = VIDEO_ES;
1404             p_stream->fmt.i_codec = VLC_FOURCC( 't','h','e','o' );
1405
1406             p_stream->b_force_backup = 1;
1407         }
1408         else if( !strncmp(content_type_string, "video/x-xvid", 14) )
1409         {
1410             p_stream->fmt.i_cat = VIDEO_ES;
1411             p_stream->fmt.i_codec = VLC_FOURCC( 'x','v','i','d' );
1412
1413             p_stream->b_force_backup = 1;
1414         }
1415         else if( !strncmp(content_type_string, "video/mpeg", 14) )
1416         {
1417             /* n.b. MPEG streams are unsupported right now */
1418             p_stream->fmt.i_cat = VIDEO_ES;
1419             p_stream->fmt.i_codec = VLC_FOURCC( 'm','p','g','v' );
1420         }
1421         else if( !strncmp(content_type_string, "text/x-cmml", 11) )
1422         {
1423             ogg_stream_packetout( &p_stream->os, p_oggpacket );
1424             p_stream->fmt.i_cat = SPU_ES;
1425             p_stream->fmt.i_codec = VLC_FOURCC( 'c','m','m','l' );
1426         }
1427     }
1428 }