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

   1 /*****************************************************************************
   2  * ogg.c : ogg stream input module for vlc
   3  *****************************************************************************
   4  * Copyright (C) 2001 VideoLAN
   5  * $Id: ogg.c,v 1.30 2003/08/09 19:49:13 gbazin Exp $
   6  *
   7  * Authors: Gildas Bazin <gbazin@netcourrier.com>
   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 #include <string.h>
  29
  30 #include <vlc/vlc.h>
  31 #include <vlc/input.h>
  32
  33 #include <sys/types.h>
  34
  35 #include <ogg/ogg.h>
  36
  37 #include <codecs.h>                        /* BITMAPINFOHEADER, WAVEFORMATEX */
  38
  39 #define OGG_BLOCK_SIZE 4096
  40 #define PAGES_READ_ONCE 1
  41
  42 /*****************************************************************************
  43  * Definitions of structures and functions used by this plugins
  44  *****************************************************************************/
  45 typedef struct logical_stream_s
  46 {
  47     ogg_stream_state os;                        /* logical stream of packets */
  48
  49     int              i_serial_no;
  50     int              i_cat;                            /* AUDIO_ES, VIDEO_ES */
  51     int              i_activated;
  52     vlc_fourcc_t     i_fourcc;
  53     vlc_fourcc_t     i_codec;
  54
  55     es_descriptor_t  *p_es;
  56     int              b_selected;                           /* newly selected */
  57
  58     /* the header of some logical streams (eg vorbis) contain essential
  59      * data for the decoder. We back them up here in case we need to re-feed
  60      * them to the decoder. */
  61     int              b_force_backup;
  62     int              i_packets_backup;
  63     ogg_packet       *p_packets_backup;
  64
  65     /* program clock reference (in units of 90kHz) derived from the previous
  66      * granulepos */
  67     mtime_t          i_pcr;
  68     mtime_t          i_interpolated_pcr;
  69
  70     /* info from logical streams */
  71     double f_rate;
  72     int i_bitrate;
  73     int i_channels;
  74     int b_reinit;
  75
  76     /* codec specific stuff */
  77     BITMAPINFOHEADER *p_bih;
  78     WAVEFORMATEX *p_wf;
  79     int i_theora_keyframe_granule_shift;
  80
  81 } logical_stream_t;
  82
  83 struct demux_sys_t
  84 {
  85     ogg_sync_state oy;        /* sync and verify incoming physical bitstream */
  86
  87     int i_streams;                           /* number of logical bitstreams */
  88     logical_stream_t **pp_stream;  /* pointer to an array of logical streams */
  89
  90     /* current audio and video es */
  91     logical_stream_t *p_stream_video;
  92     logical_stream_t *p_stream_audio;
  93     logical_stream_t *p_stream_spu;
  94
  95     /* program clock reference (in units of 90kHz) derived from the pcr of
  96      * the sub-streams */
  97     mtime_t i_pcr;
  98     mtime_t i_old_pcr;
  99
 100     int     b_seekable;
 101     int     b_reinit;
 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 /* Some defines from OggDS */
 142 #define PACKET_TYPE_HEADER   0x01
 143 #define PACKET_TYPE_BITS     0x07
 144 #define PACKET_LEN_BITS01    0xc0
 145 #define PACKET_LEN_BITS2     0x02
 146 #define PACKET_IS_SYNCPOINT  0x08
 147
 148 /* Some functions to manipulate memory */
 149 static uint16_t GetWLE( uint8_t *p_buff )
 150 {
 151     return( (p_buff[0]) + ( p_buff[1] <<8 ) );
 152 }
 153
 154 static uint32_t GetDWLE( uint8_t *p_buff )
 155 {
 156     return( p_buff[0] + ( p_buff[1] <<8 ) +
 157             ( p_buff[2] <<16 ) + ( p_buff[3] <<24 ) );
 158 }
 159
 160 static uint64_t GetQWLE( uint8_t *p_buff )
 161 {
 162     return( GetDWLE( p_buff ) + ( ((uint64_t)GetDWLE( p_buff + 4 )) << 32 ) );
 163 }
 164 /*****************************************************************************
 165  * Local prototypes
 166  *****************************************************************************/
 167 static int  Activate  ( vlc_object_t * );
 168 static void Deactivate( vlc_object_t * );
 169 static int  Demux     ( input_thread_t * );
 170
 171 /* Stream managment */
 172 static int  Ogg_StreamStart  ( input_thread_t *, demux_sys_t *, int );
 173 static void Ogg_StreamStop   ( input_thread_t *, demux_sys_t *, int );
 174
 175 /* Bitstream manipulation */
 176 static int  Ogg_Check        ( input_thread_t *p_input );
 177 static int  Ogg_ReadPage     ( input_thread_t *, demux_sys_t *, ogg_page * );
 178 static void Ogg_UpdatePCR    ( logical_stream_t *, ogg_packet * );
 179 static void Ogg_DecodePacket ( input_thread_t *p_input,
 180                                logical_stream_t *p_stream, ogg_packet * );
 181 static int  Ogg_FindLogicalStreams( input_thread_t *p_input,
 182                                     demux_sys_t *p_ogg );
 183
 184 /*****************************************************************************
 185  * Module descriptor
 186  *****************************************************************************/
 187 vlc_module_begin();
 188     set_description( _("ogg stream demuxer" ) );
 189     set_capability( "demux", 50 );
 190     set_callbacks( Activate, Deactivate );
 191     add_shortcut( "ogg" );
 192 vlc_module_end();
 193
 194 /*****************************************************************************
 195  * Stream managment
 196  *****************************************************************************/
 197 static int Ogg_StreamStart( input_thread_t *p_input,
 198                             demux_sys_t *p_ogg, int i_stream )
 199 {
 200 #define p_stream p_ogg->pp_stream[i_stream]
 201     if( !p_stream->p_es )
 202     {
 203         msg_Warn( p_input, "stream[%d] unselectable", i_stream );
 204         return( 0 );
 205     }
 206     if( p_stream->i_activated )
 207     {
 208         msg_Warn( p_input, "stream[%d] already selected", i_stream );
 209         return( 1 );
 210     }
 211
 212     if( !p_stream->p_es->p_decoder_fifo )
 213     {
 214         vlc_mutex_lock( &p_input->stream.stream_lock );
 215         input_SelectES( p_input, p_stream->p_es );
 216         vlc_mutex_unlock( &p_input->stream.stream_lock );
 217     }
 218     p_stream->i_activated = p_stream->p_es->p_decoder_fifo ? 1 : 0;
 219
 220     /* Feed the backup header to the decoder */
 221     if( !p_stream->b_force_backup )
 222     {
 223         int i;
 224         for( i = 0; i < p_stream->i_packets_backup; i++ )
 225         {
 226             Ogg_DecodePacket( p_input, p_stream,
 227                               &p_stream->p_packets_backup[i] );
 228         }
 229     }
 230
 231     return( p_stream->i_activated );
 232 #undef  p_stream
 233 }
 234
 235 static void Ogg_StreamStop( input_thread_t *p_input,
 236                             demux_sys_t *p_ogg, int i_stream )
 237 {
 238 #define p_stream    p_ogg->pp_stream[i_stream]
 239
 240     if( !p_stream->i_activated )
 241     {
 242         msg_Warn( p_input, "stream[%d] already unselected", i_stream );
 243         return;
 244     }
 245
 246     if( p_stream->p_es->p_decoder_fifo )
 247     {
 248         vlc_mutex_lock( &p_input->stream.stream_lock );
 249         input_UnselectES( p_input, p_stream->p_es );
 250         vlc_mutex_unlock( &p_input->stream.stream_lock );
 251     }
 252
 253     p_stream->i_activated = 0;
 254
 255 #undef  p_stream
 256 }
 257
 258 /****************************************************************************
 259  * Ogg_Check: Check we are dealing with an ogg stream.
 260  ****************************************************************************/
 261 static int Ogg_Check( input_thread_t *p_input )
 262 {
 263     u8 *p_peek;
 264     int i_size = input_Peek( p_input, &p_peek, 4 );
 265
 266     /* Check for the Ogg capture pattern */
 267     if( !(i_size>3) || !(p_peek[0] == 'O') || !(p_peek[1] == 'g') ||
 268         !(p_peek[2] == 'g') || !(p_peek[3] == 'S') )
 269         return VLC_EGENERIC;
 270
 271     /* FIXME: Capture pattern might not be enough so we can also check for the
 272      * the first complete page */
 273
 274     return VLC_SUCCESS;
 275 }
 276
 277 /****************************************************************************
 278  * Ogg_ReadPage: Read a full Ogg page from the physical bitstream.
 279  ****************************************************************************
 280  * Returns VLC_SUCCESS if a page has been read. An error might happen if we
 281  * are at the end of stream.
 282  ****************************************************************************/
 283 static int Ogg_ReadPage( input_thread_t *p_input, demux_sys_t *p_ogg,
 284                          ogg_page *p_oggpage )
 285 {
 286     int i_read = 0;
 287     data_packet_t *p_data;
 288     byte_t *p_buffer;
 289
 290     while( ogg_sync_pageout( &p_ogg->oy, p_oggpage ) != 1 )
 291     {
 292         i_read = input_SplitBuffer( p_input, &p_data, OGG_BLOCK_SIZE );
 293         if( i_read <= 0 )
 294             return VLC_EGENERIC;
 295
 296         p_buffer = ogg_sync_buffer( &p_ogg->oy, i_read );
 297         p_input->p_vlc->pf_memcpy( p_buffer, p_data->p_payload_start, i_read );
 298         ogg_sync_wrote( &p_ogg->oy, i_read );
 299         input_DeletePacket( p_input->p_method_data, p_data );
 300     }
 301
 302     return VLC_SUCCESS;
 303 }
 304
 305 /****************************************************************************
 306  * Ogg_UpdatePCR: update the PCR (90kHz program clock reference) for the
 307  *                current stream.
 308  ****************************************************************************/
 309 static void Ogg_UpdatePCR( logical_stream_t *p_stream,
 310                            ogg_packet *p_oggpacket )
 311 {
 312
 313     /* Convert the next granulepos into a pcr */
 314     if( p_oggpacket->granulepos >= 0 )
 315     {
 316         if( p_stream->i_fourcc != VLC_FOURCC( 't','h','e','o' ) )
 317         {
 318             p_stream->i_pcr = p_oggpacket->granulepos * 90000
 319                               / p_stream->f_rate;
 320         }
 321         else
 322         {
 323             ogg_int64_t iframe = p_oggpacket->granulepos >>
 324               p_stream->i_theora_keyframe_granule_shift;
 325             ogg_int64_t pframe = p_oggpacket->granulepos -
 326               ( iframe << p_stream->i_theora_keyframe_granule_shift );
 327
 328             p_stream->i_pcr = ( iframe + pframe ) * 90000
 329                               / p_stream->f_rate;
 330         }
 331
 332         p_stream->i_interpolated_pcr = p_stream->i_pcr;
 333     }
 334     else
 335     {
 336         /* FIXME: ffmpeg doesn't like null pts */
 337         if( p_stream->i_cat == VIDEO_ES )
 338             /* 1 frame per packet */
 339             p_stream->i_pcr += (90000 / p_stream->f_rate);
 340         else
 341             p_stream->i_pcr = -1;
 342
 343         /* no granulepos available, try to interpolate the pcr.
 344          * If we can't then don't touch the old value. */
 345         if( p_stream->i_bitrate )
 346             p_stream->i_interpolated_pcr += ( p_oggpacket->bytes * 90000
 347                                               / p_stream->i_bitrate / 8 );
 348     }
 349 }
 350
 351 /****************************************************************************
 352  * Ogg_DecodePacket: Decode an Ogg packet.
 353  ****************************************************************************/
 354 static void Ogg_DecodePacket( input_thread_t *p_input,
 355                               logical_stream_t *p_stream,
 356                               ogg_packet *p_oggpacket )
 357 {
 358     pes_packet_t  *p_pes;
 359     data_packet_t *p_data;
 360     vlc_bool_t b_trash = VLC_FALSE;
 361     int i_header_len = 0;
 362
 363     if( p_stream->b_force_backup )
 364     {
 365         /* Backup the ogg packet (likely an header packet) */
 366         ogg_packet *p_packet_backup;
 367         p_stream->i_packets_backup++;
 368         p_stream->p_packets_backup =
 369             realloc( p_stream->p_packets_backup, p_stream->i_packets_backup *
 370                      sizeof(ogg_packet) );
 371
 372         p_packet_backup =
 373             &p_stream->p_packets_backup[p_stream->i_packets_backup - 1];
 374
 375         p_packet_backup->bytes = p_oggpacket->bytes;
 376         p_packet_backup->granulepos = p_oggpacket->granulepos;
 377         p_packet_backup->packet = malloc( p_oggpacket->bytes );
 378         if( !p_packet_backup->packet ) return;
 379         memcpy( p_packet_backup->packet, p_oggpacket->packet,
 380                 p_oggpacket->bytes );
 381
 382         switch( p_stream->i_fourcc )
 383         {
 384         case VLC_FOURCC( 'v','o','r','b' ):
 385         case VLC_FOURCC( 't','h','e','o' ):
 386           if( p_stream->i_packets_backup == 3 ) p_stream->b_force_backup = 0;
 387           break;
 388
 389         default:
 390           p_stream->b_force_backup = 0;
 391           break;
 392         }
 393     }
 394
 395     vlc_mutex_lock( &p_input->stream.control.control_lock );
 396     if( p_stream->i_cat == AUDIO_ES && p_input->stream.control.b_mute )
 397     {
 398         b_trash = VLC_TRUE;
 399     }
 400     vlc_mutex_unlock( &p_input->stream.control.control_lock );
 401
 402     if( !p_stream->p_es->p_decoder_fifo || b_trash )
 403     {
 404         /* This stream isn't currently selected so we don't need to decode it,
 405          * but we do need to store its pcr as it might be selected later on. */
 406         Ogg_UpdatePCR( p_stream, p_oggpacket );
 407
 408         return;
 409     }
 410
 411     if( !( p_pes = input_NewPES( p_input->p_method_data ) ) )
 412     {
 413         return;
 414     }
 415     if( !( p_data = input_NewPacket( p_input->p_method_data,
 416                                      p_oggpacket->bytes ) ) )
 417     {
 418         input_DeletePES( p_input->p_method_data, p_pes );
 419         return;
 420     }
 421     p_data->p_payload_end = p_data->p_payload_start + p_oggpacket->bytes;
 422
 423     /* Convert the pcr into a pts */
 424     if( p_stream->i_fourcc == VLC_FOURCC( 'v','o','r','b' ) ||
 425         p_stream->i_fourcc == VLC_FOURCC( 't','h','e','o' ) )
 426     {
 427         p_pes->i_pts = ( p_stream->i_pcr < 0 ) ? 0 :
 428             input_ClockGetTS( p_input, p_input->stream.p_selected_program,
 429                               p_stream->i_pcr );
 430     }
 431     else
 432     {
 433         /* Of course subtitles had to be different! */
 434         p_pes->i_pts = ( p_oggpacket->granulepos < 0 ) ? 0 :
 435             input_ClockGetTS( p_input, p_input->stream.p_selected_program,
 436                               p_oggpacket->granulepos * 90000 /
 437                               p_stream->f_rate );
 438     }
 439
 440     /* Convert the next granulepos into a pcr */
 441     Ogg_UpdatePCR( p_stream, p_oggpacket );
 442
 443     p_pes->i_nb_data = 1;
 444     p_pes->i_dts = p_oggpacket->granulepos;
 445     p_pes->p_first = p_pes->p_last = p_data;
 446     p_pes->i_pes_size = p_oggpacket->bytes;
 447
 448     if( p_stream->i_fourcc != VLC_FOURCC( 'v','o','r','b' ) &&
 449         p_stream->i_fourcc != VLC_FOURCC( 't','a','r','k' ) &&
 450         p_stream->i_fourcc != VLC_FOURCC( 't','h','e','o' ) )
 451     {
 452         /* Remove the header from the packet */
 453         i_header_len = (*p_oggpacket->packet & PACKET_LEN_BITS01) >> 6;
 454         i_header_len |= (*p_oggpacket->packet & PACKET_LEN_BITS2) << 1;
 455         i_header_len++;
 456
 457         p_pes->i_pes_size -= i_header_len;
 458         p_pes->i_dts = 0;
 459     }
 460
 461     if( p_stream->i_fourcc == VLC_FOURCC( 't','a','r','k' ) )
 462     {
 463         /* FIXME: the biggest hack I've ever done */
 464         msg_Warn( p_input, "tark pts: "I64Fd", granule: "I64Fd,
 465                   p_pes->i_pts, p_pes->i_dts );
 466         msleep(10000);
 467     }
 468
 469     memcpy( p_data->p_payload_start,
 470             p_oggpacket->packet + i_header_len,
 471             p_oggpacket->bytes - i_header_len );
 472
 473     p_data->p_payload_end = p_data->p_payload_start + p_pes->i_pes_size;
 474     p_data->b_discard_payload = 0;
 475
 476     input_DecodePES( p_stream->p_es->p_decoder_fifo, p_pes );
 477 }
 478
 479 /****************************************************************************
 480  * Ogg_FindLogicalStreams: Find the logical streams embedded in the physical
 481  *                         stream and fill p_ogg.
 482  *****************************************************************************
 483  * The initial page of a logical stream is marked as a 'bos' page.
 484  * Furthermore, the Ogg specification mandates that grouped bitstreams begin
 485  * together and all of the initial pages must appear before any data pages.
 486  *
 487  * On success this function returns VLC_SUCCESS.
 488  ****************************************************************************/
 489 static int Ogg_FindLogicalStreams( input_thread_t *p_input, demux_sys_t *p_ogg)
 490 {
 491     ogg_packet oggpacket;
 492     ogg_page oggpage;
 493     int i_stream;
 494
 495     while( Ogg_ReadPage( p_input, p_ogg, &oggpage ) == VLC_SUCCESS )
 496     {
 497         if( ogg_page_bos( &oggpage ) )
 498         {
 499
 500             /* All is wonderful in our fine fine little world.
 501              * We found the beginning of our first logical stream. */
 502             while( ogg_page_bos( &oggpage ) )
 503             {
 504                 p_ogg->i_streams++;
 505                 p_ogg->pp_stream =
 506                     realloc( p_ogg->pp_stream, p_ogg->i_streams *
 507                              sizeof(logical_stream_t *) );
 508
 509 #define p_stream p_ogg->pp_stream[p_ogg->i_streams - 1]
 510
 511                 p_stream = malloc( sizeof(logical_stream_t) );
 512                 memset( p_stream, 0, sizeof(logical_stream_t) );
 513
 514                 /* Setup the logical stream */
 515                 p_stream->i_serial_no = ogg_page_serialno( &oggpage );
 516                 ogg_stream_init( &p_stream->os, p_stream->i_serial_no );
 517
 518                 /* Extract the initial header from the first page and verify
 519                  * the codec type of tis Ogg bitstream */
 520                 if( ogg_stream_pagein( &p_stream->os, &oggpage ) < 0 )
 521                 {
 522                     /* error. stream version mismatch perhaps */
 523                     msg_Err( p_input, "Error reading first page of "
 524                              "Ogg bitstream data" );
 525                     return VLC_EGENERIC;
 526                 }
 527
 528                 /* FIXME: check return value */
 529                 ogg_stream_packetpeek( &p_stream->os, &oggpacket );
 530
 531                 /* Check for Vorbis header */
 532                 if( oggpacket.bytes >= 7 &&
 533                     ! strncmp( &oggpacket.packet[1], "vorbis", 6 ) )
 534                 {
 535                     oggpack_buffer opb;
 536
 537                     msg_Dbg( p_input, "found vorbis header" );
 538                     p_stream->i_cat = AUDIO_ES;
 539                     p_stream->i_fourcc = VLC_FOURCC( 'v','o','r','b' );
 540
 541                     /* Signal that we want to keep a backup of the vorbis
 542                      * stream headers. They will be used when switching between
 543                      * audio streams. */
 544                     p_stream->b_force_backup = 1;
 545
 546                     /* Cheat and get additionnal info ;) */
 547                     oggpack_readinit( &opb, oggpacket.packet, oggpacket.bytes);
 548                     oggpack_adv( &opb, 88 );
 549                     p_stream->i_channels = oggpack_read( &opb, 8 );
 550                     p_stream->f_rate = oggpack_read( &opb, 32 );
 551                     oggpack_adv( &opb, 32 );
 552                     p_stream->i_bitrate = oggpack_read( &opb, 32 );
 553                     {
 554                         char title[sizeof("Stream") + 10];
 555                         input_info_category_t *p_cat;
 556                         sprintf( title, "Stream %d", p_ogg->i_streams );
 557                         p_cat = input_InfoCategory( p_input, title );
 558                         input_AddInfo( p_cat, _("Type"), _("Audio") );
 559                         input_AddInfo( p_cat, _("Codec"), _("Vorbis") );
 560                         input_AddInfo( p_cat, _("Sample Rate"), "%f",
 561                                        p_stream->f_rate );
 562                         input_AddInfo( p_cat, _("Channels"), "%d",
 563                                        p_stream->i_channels );
 564                         input_AddInfo( p_cat, _("Bit Rate"), "%d",
 565                                        p_stream->i_bitrate );
 566                     }
 567                 }
 568                 /* Check for Theora header */
 569                 else if( oggpacket.bytes >= 7 &&
 570                          ! strncmp( &oggpacket.packet[1], "theora", 6 ) )
 571                 {
 572 #ifdef HAVE_OGGPACKB
 573                     oggpack_buffer opb;
 574                     int i_fps_numerator;
 575                     int i_fps_denominator;
 576                     int i_keyframe_frequency_force;
 577 #endif
 578
 579                     msg_Dbg( p_input, "found theora header" );
 580 #ifdef HAVE_OGGPACKB
 581                     p_stream->i_cat = VIDEO_ES;
 582                     p_stream->i_fourcc = VLC_FOURCC( 't','h','e','o' );
 583
 584                     /* Signal that we want to keep a backup of the vorbis
 585                      * stream headers. They will be used when switching between
 586                      * audio streams. */
 587                     p_stream->b_force_backup = 1;
 588
 589                     /* Cheat and get additionnal info ;) */
 590                     oggpackB_readinit(&opb, oggpacket.packet, oggpacket.bytes);
 591                     oggpackB_adv( &opb, 56 );
 592                     oggpackB_read( &opb, 8 ); /* major version num */
 593                     oggpackB_read( &opb, 8 ); /* minor version num */
 594                     oggpackB_read( &opb, 8 ); /* subminor version num */
 595                     oggpackB_read( &opb, 16 ) /*<< 4*/; /* width */
 596                     oggpackB_read( &opb, 16 ) /*<< 4*/; /* height */
 597                     oggpackB_read( &opb, 24 ); /* frame width */
 598                     oggpackB_read( &opb, 24 ); /* frame height */
 599                     oggpackB_read( &opb, 8 ); /* x offset */
 600                     oggpackB_read( &opb, 8 ); /* y offset */
 601
 602                     i_fps_numerator = oggpackB_read( &opb, 32 );
 603                     i_fps_denominator = oggpackB_read( &opb, 32 );
 604                     oggpackB_read( &opb, 24 ); /* aspect_numerator */
 605                     oggpackB_read( &opb, 24 ); /* aspect_denominator */
 606                     i_keyframe_frequency_force = 1 << oggpackB_read( &opb, 5 );
 607                     oggpackB_read( &opb, 8 ); /* colorspace */
 608                     p_stream->i_bitrate = oggpackB_read( &opb, 24 );
 609                     oggpackB_read( &opb, 6 ); /* quality */
 610
 611                     /* granule_shift = i_log( frequency_force -1 ) */
 612                     p_stream->i_theora_keyframe_granule_shift = 0;
 613                     i_keyframe_frequency_force--;
 614                     while( i_keyframe_frequency_force )
 615                     {
 616                         p_stream->i_theora_keyframe_granule_shift++;
 617                         i_keyframe_frequency_force >>= 1;
 618                     }
 619
 620                     p_stream->f_rate = (float)i_fps_numerator /
 621                                                 i_fps_denominator;
 622                     msg_Dbg( p_input,
 623                              "found theora header, bitrate: %i, rate: %f",
 624                              p_stream->i_bitrate, p_stream->f_rate );
 625                     {
 626                         char title[sizeof("Stream") + 10];
 627                         input_info_category_t *p_cat;
 628                         sprintf( title, "Stream %d", p_ogg->i_streams );
 629                         p_cat = input_InfoCategory( p_input, title );
 630                         input_AddInfo( p_cat, _("Type"), _("Video") );
 631                         input_AddInfo( p_cat, _("Codec"), _("Theora") );
 632                         input_AddInfo( p_cat, _("Frame Rate"), "%f",
 633                                        p_stream->f_rate );
 634                         input_AddInfo( p_cat, _("Bit Rate"), "%d",
 635                                        p_stream->i_bitrate );
 636                     }
 637 #else /* HAVE_OGGPACKB */
 638                     msg_Dbg( p_input, "the ogg demuxer has been compiled "
 639                              "without support for the oggpackB extension."
 640                              "The theora stream won't be decoded." );
 641                     free( p_stream );
 642                     p_ogg->i_streams--;
 643                     continue;
 644 #endif /* HAVE_OGGPACKB */
 645                 }
 646                 /* Check for Tarkin header */
 647                 else if( oggpacket.bytes >= 7 &&
 648                          ! strncmp( &oggpacket.packet[1], "tarkin", 6 ) )
 649                 {
 650                     oggpack_buffer opb;
 651
 652                     msg_Dbg( p_input, "found tarkin header" );
 653                     p_stream->i_cat = VIDEO_ES;
 654                     p_stream->i_fourcc = VLC_FOURCC( 't','a','r','k' );
 655
 656                     /* Cheat and get additionnal info ;) */
 657                     oggpack_readinit( &opb, oggpacket.packet, oggpacket.bytes);
 658                     oggpack_adv( &opb, 88 );
 659                     oggpack_adv( &opb, 104 );
 660                     p_stream->i_bitrate = oggpack_read( &opb, 32 );
 661                     p_stream->f_rate = 2; /* FIXME */
 662                     msg_Dbg( p_input,
 663                              "found tarkin header, bitrate: %i, rate: %f",
 664                              p_stream->i_bitrate, p_stream->f_rate );
 665                                         {
 666                         char title[sizeof("Stream") + 10];
 667                         input_info_category_t *p_cat;
 668                         sprintf( title, "Stream %d", p_ogg->i_streams );
 669                         p_cat = input_InfoCategory( p_input, title );
 670                         input_AddInfo( p_cat, _("Type"), _("Video") );
 671                         input_AddInfo( p_cat, _("Codec"), _("tarkin") );
 672                         input_AddInfo( p_cat, _("Sample Rate"), "%f",
 673                                        p_stream->f_rate );
 674                         input_AddInfo( p_cat, _("Bit Rate"), "%d",
 675                                        p_stream->i_bitrate );
 676                     }
 677
 678                 }
 679                 else if( oggpacket.bytes >= 142 &&
 680                          !strncmp( &oggpacket.packet[1],
 681                                    "Direct Show Samples embedded in Ogg", 35 ))
 682                 {
 683                     /* Old header type */
 684
 685                     /* Check for video header (old format) */
 686                     if( GetDWLE((oggpacket.packet+96)) == 0x05589f80 &&
 687                         oggpacket.bytes >= 184 )
 688                     {
 689                         p_stream->i_cat = VIDEO_ES;
 690
 691                         p_stream->p_bih = (BITMAPINFOHEADER *)
 692                             malloc( sizeof(BITMAPINFOHEADER) );
 693                         if( !p_stream->p_bih )
 694                         {
 695                             /* Mem allocation error, just ignore the stream */
 696                             free( p_stream );
 697                             p_ogg->i_streams--;
 698                             continue;
 699                         }
 700                         p_stream->p_bih->biSize = sizeof(BITMAPINFOHEADER);
 701                         p_stream->p_bih->biCompression= p_stream->i_fourcc =
 702                             VLC_FOURCC( oggpacket.packet[68],
 703                                         oggpacket.packet[69],
 704                                         oggpacket.packet[70],
 705                                         oggpacket.packet[71] );
 706                         msg_Dbg( p_input, "found video header of type: %.4s",
 707                                  (char *)&p_stream->i_fourcc );
 708
 709                         p_stream->f_rate = 10000000.0 /
 710                             GetQWLE((oggpacket.packet+164));
 711                         p_stream->p_bih->biBitCount =
 712                             GetWLE((oggpacket.packet+182));
 713                         if( !p_stream->p_bih->biBitCount )
 714                             p_stream->p_bih->biBitCount=24; // hack, FIXME
 715                         p_stream->p_bih->biWidth =
 716                             GetDWLE((oggpacket.packet+176));
 717                         p_stream->p_bih->biHeight =
 718                             GetDWLE((oggpacket.packet+180));
 719                         p_stream->p_bih->biPlanes= 1 ;
 720                         p_stream->p_bih->biSizeImage =
 721                             (p_stream->p_bih->biBitCount >> 3) *
 722                             p_stream->p_bih->biWidth *
 723                             p_stream->p_bih->biHeight;
 724
 725                         msg_Dbg( p_input,
 726                              "fps: %f, width:%i; height:%i, bitcount:%i",
 727                             p_stream->f_rate, p_stream->p_bih->biWidth,
 728                             p_stream->p_bih->biHeight,
 729                             p_stream->p_bih->biBitCount);
 730                         {
 731                             char title[sizeof("Stream") + 10];
 732                             input_info_category_t *p_cat;
 733                             sprintf( title, "Stream %d", p_ogg->i_streams );
 734                             p_cat = input_InfoCategory( p_input, title );
 735                             input_AddInfo( p_cat, _("Type"), _("Video") );
 736                             input_AddInfo( p_cat, _("Codec"), "%.4s",
 737                                            (char *)&p_stream->i_fourcc );
 738                             input_AddInfo( p_cat, _("Frame Rate"), "%f",
 739                                            p_stream->f_rate );
 740                             input_AddInfo( p_cat, _("Bit Count"), "%d",
 741                                            p_stream->p_bih->biBitCount );
 742                             input_AddInfo( p_cat, _("Width"), "%d",
 743                                            p_stream->p_bih->biWidth );
 744                             input_AddInfo( p_cat, _("Height"), "%d",
 745                                            p_stream->p_bih->biHeight );
 746                         }
 747                         p_stream->i_bitrate = 0;
 748                     }
 749                     /* Check for audio header (old format) */
 750                     else if( GetDWLE((oggpacket.packet+96)) == 0x05589F81 )
 751                     {
 752                         unsigned int i_extra_size;
 753
 754                         p_stream->i_cat = AUDIO_ES;
 755
 756                         i_extra_size = GetWLE((oggpacket.packet+140));
 757
 758                         p_stream->p_wf = (WAVEFORMATEX *)
 759                             malloc( sizeof(WAVEFORMATEX) + i_extra_size );
 760                         if( !p_stream->p_wf )
 761                         {
 762                             /* Mem allocation error, just ignore the stream */
 763                             free( p_stream );
 764                             p_ogg->i_streams--;
 765                             continue;
 766                         }
 767
 768                         p_stream->p_wf->wFormatTag =
 769                             GetWLE((oggpacket.packet+124));
 770                         p_stream->p_wf->nChannels =
 771                             GetWLE((oggpacket.packet+126));
 772                         p_stream->f_rate = p_stream->p_wf->nSamplesPerSec =
 773                             GetDWLE((oggpacket.packet+128));
 774                         p_stream->i_bitrate = p_stream->p_wf->nAvgBytesPerSec =
 775                             GetDWLE((oggpacket.packet+132));
 776                         p_stream->i_bitrate *= 8;
 777                         p_stream->p_wf->nBlockAlign =
 778                             GetWLE((oggpacket.packet+136));
 779                         p_stream->p_wf->wBitsPerSample =
 780                             GetWLE((oggpacket.packet+138));
 781                         p_stream->p_wf->cbSize = i_extra_size;
 782
 783                         if( i_extra_size > 0 )
 784                             memcpy( p_stream->p_wf+sizeof(WAVEFORMATEX),
 785                                     oggpacket.packet+142, i_extra_size );
 786
 787                         switch( p_stream->p_wf->wFormatTag )
 788                         {
 789                         case WAVE_FORMAT_PCM:
 790                             p_stream->i_fourcc =
 791                                 VLC_FOURCC( 'a', 'r', 'a', 'w' );
 792                             break;
 793                         case WAVE_FORMAT_MPEG:
 794                         case WAVE_FORMAT_MPEGLAYER3:
 795                             p_stream->i_fourcc =
 796                                 VLC_FOURCC( 'm', 'p', 'g', 'a' );
 797                             break;
 798                         case WAVE_FORMAT_A52:
 799                             p_stream->i_fourcc =
 800                                 VLC_FOURCC( 'a', '5', '2', ' ' );
 801                             break;
 802                         case WAVE_FORMAT_WMA1:
 803                             p_stream->i_fourcc =
 804                                 VLC_FOURCC( 'w', 'm', 'a', '1' );
 805                             break;
 806                         case WAVE_FORMAT_WMA2:
 807                             p_stream->i_fourcc =
 808                                 VLC_FOURCC( 'w', 'm', 'a', '2' );
 809                             break;
 810                         default:
 811                             p_stream->i_fourcc = VLC_FOURCC( 'm', 's',
 812                                 ( p_stream->p_wf->wFormatTag >> 8 ) & 0xff,
 813                                 p_stream->p_wf->wFormatTag & 0xff );
 814                         }
 815
 816                         msg_Dbg( p_input, "found audio header of type: %.4s",
 817                                  (char *)&p_stream->i_fourcc );
 818                         msg_Dbg( p_input, "audio:0x%4.4x channels:%d %dHz "
 819                                  "%dbits/sample %dkb/s",
 820                                  p_stream->p_wf->wFormatTag,
 821                                  p_stream->p_wf->nChannels,
 822                                  p_stream->p_wf->nSamplesPerSec,
 823                                  p_stream->p_wf->wBitsPerSample,
 824                                  p_stream->p_wf->nAvgBytesPerSec * 8 / 1024 );
 825                         {
 826                             char title[sizeof("Stream") + 10];
 827                             input_info_category_t *p_cat;
 828                             sprintf( title, "Stream %d", p_ogg->i_streams );
 829                             p_cat = input_InfoCategory( p_input, title );
 830                             input_AddInfo( p_cat, _("Type"), _("Audio") );
 831                             input_AddInfo( p_cat, _("Codec"), "%.4s",
 832                                            (char *)&p_stream->i_fourcc );
 833                             input_AddInfo( p_cat, _("Sample Rate"), "%d",
 834                                            p_stream->p_wf->nSamplesPerSec );
 835                             input_AddInfo( p_cat, _("Bit Rate"), "%d",
 836                                            p_stream->p_wf->nAvgBytesPerSec * 8
 837                                               / 1024 );
 838                             input_AddInfo( p_cat, _("Channels"), "%d",
 839                                            p_stream->p_wf->nChannels );
 840                             input_AddInfo( p_cat, _("Bits per Sample"), "%d",
 841                                            p_stream->p_wf->wBitsPerSample );
 842                         }
 843
 844                     }
 845                     else
 846                     {
 847                         msg_Dbg( p_input, "stream %d has an old header "
 848                             "but is of an unknown type", p_ogg->i_streams-1 );
 849                         free( p_stream );
 850                         p_ogg->i_streams--;
 851                     }
 852                 }
 853                 else if( (*oggpacket.packet & PACKET_TYPE_BITS )
 854                          == PACKET_TYPE_HEADER &&
 855                          oggpacket.bytes >= (int)sizeof(stream_header)+1 )
 856                 {
 857                     stream_header *st = (stream_header *)(oggpacket.packet+1);
 858
 859                     /* Check for video header (new format) */
 860                     if( !strncmp( st->streamtype, "video", 5 ) )
 861                     {
 862                         p_stream->i_cat = VIDEO_ES;
 863
 864                         /* We need to get rid of the header packet */
 865                         ogg_stream_packetout( &p_stream->os, &oggpacket );
 866
 867                         p_stream->p_bih = (BITMAPINFOHEADER *)
 868                             malloc( sizeof(BITMAPINFOHEADER) );
 869                         if( !p_stream->p_bih )
 870                         {
 871                             /* Mem allocation error, just ignore the stream */
 872                             free( p_stream );
 873                             p_ogg->i_streams--;
 874                             continue;
 875                         }
 876                         p_stream->p_bih->biSize = sizeof(BITMAPINFOHEADER);
 877                         p_stream->p_bih->biCompression=
 878                             p_stream->i_fourcc = VLC_FOURCC( st->subtype[0],
 879                                                              st->subtype[1],
 880                                                              st->subtype[2],
 881                                                              st->subtype[3] );
 882                         msg_Dbg( p_input, "found video header of type: %.4s",
 883                                  (char *)&p_stream->i_fourcc );
 884
 885                         p_stream->f_rate = 10000000.0 /
 886                             GetQWLE((uint8_t *)&st->time_unit);
 887                         p_stream->p_bih->biBitCount =
 888                             GetWLE((uint8_t *)&st->bits_per_sample);
 889                         p_stream->p_bih->biWidth =
 890                             GetDWLE((uint8_t *)&st->sh.video.width);
 891                         p_stream->p_bih->biHeight =
 892                             GetDWLE((uint8_t *)&st->sh.video.height);
 893                         p_stream->p_bih->biPlanes= 1 ;
 894                         p_stream->p_bih->biSizeImage =
 895                             (p_stream->p_bih->biBitCount >> 3) *
 896                             p_stream->p_bih->biWidth *
 897                             p_stream->p_bih->biHeight;
 898
 899                         msg_Dbg( p_input,
 900                              "fps: %f, width:%i; height:%i, bitcount:%i",
 901                             p_stream->f_rate, p_stream->p_bih->biWidth,
 902                             p_stream->p_bih->biHeight,
 903                             p_stream->p_bih->biBitCount);
 904
 905                         {
 906                             char title[sizeof("Stream") + 10];
 907                             input_info_category_t *p_cat;
 908                             sprintf( title, "Stream %d", p_ogg->i_streams );
 909                             p_cat = input_InfoCategory( p_input, title );
 910                             input_AddInfo( p_cat, _("Type"), _("Video") );
 911                             input_AddInfo( p_cat, _("Codec"), "%.4s",
 912                                            (char *)&p_stream->i_fourcc );
 913                             input_AddInfo( p_cat, _("Frame Rate"), "%f",
 914                                            p_stream->f_rate );
 915                             input_AddInfo( p_cat, _("Bit Count"), "%d",
 916                                            p_stream->p_bih->biBitCount );
 917                             input_AddInfo( p_cat, _("Width"), "%d",
 918                                            p_stream->p_bih->biWidth );
 919                             input_AddInfo( p_cat, _("Height"), "%d",
 920                                            p_stream->p_bih->biHeight );
 921                         }
 922                         p_stream->i_bitrate = 0;
 923                     }
 924                     /* Check for audio header (new format) */
 925                     else if( !strncmp( st->streamtype, "audio", 5 ) )
 926                     {
 927                         char p_buffer[5];
 928
 929                         p_stream->i_cat = AUDIO_ES;
 930
 931                         /* We need to get rid of the header packet */
 932                         ogg_stream_packetout( &p_stream->os, &oggpacket );
 933
 934                         p_stream->p_wf = (WAVEFORMATEX *)
 935                             malloc( sizeof(WAVEFORMATEX) );
 936                         if( !p_stream->p_wf )
 937                         {
 938                             /* Mem allocation error, just ignore the stream */
 939                             free( p_stream );
 940                             p_ogg->i_streams--;
 941                             continue;
 942                         }
 943
 944                         memcpy( p_buffer, st->subtype, 4 );
 945                         p_buffer[4] = '\0';
 946                         p_stream->p_wf->wFormatTag = strtol(p_buffer,NULL,16);
 947                         p_stream->p_wf->nChannels =
 948                             GetWLE((uint8_t *)&st->sh.audio.channels);
 949                         p_stream->f_rate = p_stream->p_wf->nSamplesPerSec =
 950                             GetQWLE((uint8_t *)&st->samples_per_unit);
 951                         p_stream->i_bitrate = p_stream->p_wf->nAvgBytesPerSec =
 952                             GetDWLE((uint8_t *)&st->sh.audio.avgbytespersec);
 953                         p_stream->i_bitrate *= 8;
 954                         p_stream->p_wf->nBlockAlign =
 955                             GetWLE((uint8_t *)&st->sh.audio.blockalign);
 956                         p_stream->p_wf->wBitsPerSample =
 957                             GetWLE((uint8_t *)&st->bits_per_sample);
 958                         p_stream->p_wf->cbSize = 0;
 959
 960                         switch( p_stream->p_wf->wFormatTag )
 961                         {
 962                         case WAVE_FORMAT_PCM:
 963                             p_stream->i_fourcc =
 964                                 VLC_FOURCC( 'a', 'r', 'a', 'w' );
 965                             break;
 966                         case WAVE_FORMAT_MPEG:
 967                         case WAVE_FORMAT_MPEGLAYER3:
 968                             p_stream->i_fourcc =
 969                                 VLC_FOURCC( 'm', 'p', 'g', 'a' );
 970                             break;
 971                         case WAVE_FORMAT_A52:
 972                             p_stream->i_fourcc =
 973                                 VLC_FOURCC( 'a', '5', '2', ' ' );
 974                             break;
 975                         case WAVE_FORMAT_WMA1:
 976                             p_stream->i_fourcc =
 977                                 VLC_FOURCC( 'w', 'm', 'a', '1' );
 978                             break;
 979                         case WAVE_FORMAT_WMA2:
 980                             p_stream->i_fourcc =
 981                                 VLC_FOURCC( 'w', 'm', 'a', '2' );
 982                             break;
 983                         default:
 984                             p_stream->i_fourcc = VLC_FOURCC( 'm', 's',
 985                                 ( p_stream->p_wf->wFormatTag >> 8 ) & 0xff,
 986                                 p_stream->p_wf->wFormatTag & 0xff );
 987                         }
 988
 989                         msg_Dbg( p_input, "found audio header of type: %.4s",
 990                                  (char *)&p_stream->i_fourcc );
 991                         msg_Dbg( p_input, "audio:0x%4.4x channels:%d %dHz "
 992                                  "%dbits/sample %dkb/s",
 993                                  p_stream->p_wf->wFormatTag,
 994                                  p_stream->p_wf->nChannels,
 995                                  p_stream->p_wf->nSamplesPerSec,
 996                                  p_stream->p_wf->wBitsPerSample,
 997                                  p_stream->p_wf->nAvgBytesPerSec * 8 / 1024 );
 998                         {
 999                             char title[sizeof("Stream") + 10];
1000                             input_info_category_t *p_cat;
1001                             sprintf( title, "Stream %d", p_ogg->i_streams );
1002                             p_cat = input_InfoCategory( p_input, title );
1003                             input_AddInfo( p_cat, _("Type"), _("Audio") );
1004                             input_AddInfo( p_cat, _("Codec"), "%.4s",
1005                                            (char *)&p_stream->i_fourcc );
1006                             input_AddInfo( p_cat, _("Sample Rate"), "%d",
1007                                            p_stream->p_wf->nSamplesPerSec );
1008                             input_AddInfo( p_cat, _("Bit Rate"), "%d",
1009                                            p_stream->p_wf->nAvgBytesPerSec * 8
1010                                               / 1024 );
1011                             input_AddInfo( p_cat, _("Channels"), "%d",
1012                                            p_stream->p_wf->nChannels );
1013                             input_AddInfo( p_cat, _("Bits per Sample"), "%d",
1014                                            p_stream->p_wf->wBitsPerSample );
1015                         }
1016                     }
1017                     /* Check for text (subtitles) header */
1018                     else if( !strncmp(st->streamtype, "text", 4) )
1019                     {
1020                         /* We need to get rid of the header packet */
1021                         ogg_stream_packetout( &p_stream->os, &oggpacket );
1022
1023                         msg_Dbg( p_input, "found text subtitles header" );
1024                         p_stream->i_cat = SPU_ES;
1025                         p_stream->i_fourcc =
1026                             VLC_FOURCC( 's', 'u', 'b', 't' );
1027                         p_stream->f_rate = 1000; /* granulepos is in milisec */
1028                     }
1029                     else
1030                     {
1031                         msg_Dbg( p_input, "stream %d has a header marker "
1032                             "but is of an unknown type", p_ogg->i_streams-1 );
1033                         free( p_stream );
1034                         p_ogg->i_streams--;
1035                     }
1036                 }
1037                 else
1038                 {
1039                     msg_Dbg( p_input, "stream %d is of unknown type",
1040                              p_ogg->i_streams-1 );
1041                     free( p_stream );
1042                     p_ogg->i_streams--;
1043                 }
1044
1045 #undef p_stream
1046
1047                 if( Ogg_ReadPage( p_input, p_ogg, &oggpage ) != VLC_SUCCESS )
1048                     return VLC_EGENERIC;
1049             }
1050
1051             /* This is the first data page, which means we are now finished
1052              * with the initial pages. We just need to store it in the relevant
1053              * bitstream. */
1054             for( i_stream = 0; i_stream < p_ogg->i_streams; i_stream++ )
1055             {
1056                 if( ogg_stream_pagein( &p_ogg->pp_stream[i_stream]->os,
1057                                        &oggpage ) == 0 )
1058                 {
1059                     break;
1060                 }
1061             }
1062             return VLC_SUCCESS;
1063         }
1064     }
1065     return VLC_EGENERIC;
1066 }
1067
1068 /*****************************************************************************
1069  * Activate: initializes ogg demux structures
1070  *****************************************************************************/
1071 static int Activate( vlc_object_t * p_this )
1072 {
1073     int i_stream, b_forced;
1074     demux_sys_t    *p_ogg;
1075     input_thread_t *p_input = (input_thread_t *)p_this;
1076
1077     p_input->p_demux_data = NULL;
1078     b_forced = ( ( *p_input->psz_demux )&&
1079                  ( !strncmp( p_input->psz_demux, "ogg", 10 ) ) ) ? 1 : 0;
1080
1081     /* Check if we are dealing with an ogg stream */
1082     if( !b_forced && ( Ogg_Check( p_input ) != VLC_SUCCESS ) )
1083         return -1;
1084
1085     /* Allocate p_ogg */
1086     if( !( p_ogg = malloc( sizeof( demux_sys_t ) ) ) )
1087     {
1088         msg_Err( p_input, "out of memory" );
1089         goto error;
1090     }
1091     memset( p_ogg, 0, sizeof( demux_sys_t ) );
1092     p_input->p_demux_data = p_ogg;
1093
1094     p_ogg->i_pcr  = 0;
1095     p_ogg->b_seekable = ( ( p_input->stream.b_seekable )
1096                         &&( p_input->stream.i_method == INPUT_METHOD_FILE ) );
1097
1098     /* Initialize the Ogg physical bitstream parser */
1099     ogg_sync_init( &p_ogg->oy );
1100
1101     /* Find the logical streams embedded in the physical stream and
1102      * initialize our p_ogg structure. */
1103     if( Ogg_FindLogicalStreams( p_input, p_ogg ) != VLC_SUCCESS )
1104     {
1105         msg_Err( p_input, "couldn't find an ogg logical stream" );
1106         goto error;
1107     }
1108
1109     /* Set the demux function */
1110     p_input->pf_demux = Demux;
1111
1112     /* Initialize access plug-in structures. */
1113     if( p_input->i_mtu == 0 )
1114     {
1115         /* Improve speed. */
1116         p_input->i_bufsize = INPUT_DEFAULT_BUFSIZE;
1117     }
1118
1119     /* Create one program */
1120     vlc_mutex_lock( &p_input->stream.stream_lock );
1121     if( input_InitStream( p_input, 0 ) == -1)
1122     {
1123         vlc_mutex_unlock( &p_input->stream.stream_lock );
1124         msg_Err( p_input, "cannot init stream" );
1125         goto error;
1126     }
1127     if( input_AddProgram( p_input, 0, 0) == NULL )
1128     {
1129         vlc_mutex_unlock( &p_input->stream.stream_lock );
1130         msg_Err( p_input, "cannot add program" );
1131         goto error;
1132     }
1133     p_input->stream.p_selected_program = p_input->stream.pp_programs[0];
1134     p_input->stream.i_mux_rate = 0;
1135     vlc_mutex_unlock( &p_input->stream.stream_lock );
1136
1137     for( i_stream = 0 ; i_stream < p_ogg->i_streams; i_stream++ )
1138     {
1139 #define p_stream p_ogg->pp_stream[i_stream]
1140         vlc_mutex_lock( &p_input->stream.stream_lock );
1141         p_stream->p_es = input_AddES( p_input,
1142                                       p_input->stream.p_selected_program,
1143                                       i_stream,
1144                                       p_stream->i_cat, NULL, 0 );
1145         p_input->stream.i_mux_rate += (p_stream->i_bitrate / ( 8 * 50 ));
1146         vlc_mutex_unlock( &p_input->stream.stream_lock );
1147         p_stream->p_es->i_stream_id = i_stream;
1148         p_stream->p_es->i_fourcc = p_stream->i_fourcc;
1149         p_stream->p_es->p_waveformatex      = (void*)p_stream->p_wf;
1150         p_stream->p_es->p_bitmapinfoheader  = (void*)p_stream->p_bih;
1151 #undef p_stream
1152     }
1153
1154     for( i_stream = 0; i_stream < p_ogg->i_streams; i_stream++ )
1155     {
1156 #define p_stream  p_ogg->pp_stream[i_stream]
1157         switch( p_stream->p_es->i_cat )
1158         {
1159             case( VIDEO_ES ):
1160                 if( (p_ogg->p_stream_video == NULL) )
1161                 {
1162                     p_ogg->p_stream_video = p_stream;
1163                     /* TODO add test to see if a decoder has been found */
1164                     Ogg_StreamStart( p_input, p_ogg, i_stream );
1165                 }
1166                 break;
1167
1168             case( AUDIO_ES ):
1169                 if( (p_ogg->p_stream_audio == NULL) )
1170                 {
1171                     int i_audio = config_GetInt( p_input, "audio-channel" );
1172                     if( i_audio == i_stream || i_audio <= 0 ||
1173                         i_audio >= p_ogg->i_streams ||
1174                         p_ogg->pp_stream[i_audio]->p_es->i_cat != AUDIO_ES )
1175                     {
1176                         p_ogg->p_stream_audio = p_stream;
1177                         Ogg_StreamStart( p_input, p_ogg, i_stream );
1178                     }
1179                 }
1180                 break;
1181
1182             case( SPU_ES ):
1183                 if( (p_ogg->p_stream_spu == NULL) )
1184                 {
1185                     /* for spu, default is none */
1186                     int i_spu = config_GetInt( p_input, "spu-channel" );
1187                     if( i_spu < 0 || i_spu >= p_ogg->i_streams ||
1188                         p_ogg->pp_stream[i_spu]->p_es->i_cat != SPU_ES )
1189                     {
1190                         break;
1191                     }
1192                     else if( i_spu == i_stream )
1193                     {
1194                         p_ogg->p_stream_spu = p_stream;
1195                         Ogg_StreamStart( p_input, p_ogg, i_stream );
1196                     }
1197                 }
1198                 break;
1199
1200             default:
1201                 break;
1202         }
1203 #undef p_stream
1204     }
1205
1206     /* we select the first audio and video ES */
1207     vlc_mutex_lock( &p_input->stream.stream_lock );
1208     if( !p_ogg->p_stream_video )
1209     {
1210         msg_Warn( p_input, "no video stream found" );
1211     }
1212     if( !p_ogg->p_stream_audio )
1213     {
1214         msg_Warn( p_input, "no audio stream found!" );
1215     }
1216     p_input->stream.p_selected_program->b_is_ok = 1;
1217     vlc_mutex_unlock( &p_input->stream.stream_lock );
1218
1219     /* Call the pace control */
1220     input_ClockManageRef( p_input,
1221                           p_input->stream.p_selected_program,
1222                           p_ogg->i_pcr );
1223
1224     return 0;
1225
1226  error:
1227     Deactivate( (vlc_object_t *)p_input );
1228     return -1;
1229
1230 }
1231
1232 /*****************************************************************************
1233  * Deactivate: frees unused data
1234  *****************************************************************************/
1235 static void Deactivate( vlc_object_t *p_this )
1236 {
1237     input_thread_t *p_input = (input_thread_t *)p_this;
1238     demux_sys_t *p_ogg = (demux_sys_t *)p_input->p_demux_data  ;
1239     int i, j;
1240
1241     if( p_ogg )
1242     {
1243         /* Cleanup the bitstream parser */
1244         ogg_sync_clear( &p_ogg->oy );
1245
1246         for( i = 0; i < p_ogg->i_streams; i++ )
1247         {
1248             ogg_stream_clear( &p_ogg->pp_stream[i]->os );
1249             for( j = 0; j < p_ogg->pp_stream[i]->i_packets_backup; j++ )
1250             {
1251                 free( p_ogg->pp_stream[i]->p_packets_backup[j].packet );
1252             }
1253             if( p_ogg->pp_stream[i]->p_packets_backup)
1254                 free( p_ogg->pp_stream[i]->p_packets_backup );
1255 #if 0 /* hmmm, it's already freed in input_DelES() */
1256             if( p_ogg->pp_stream[i]->p_bih )
1257                 free( p_ogg->pp_stream[i]->p_bih );
1258             if( p_ogg->pp_stream[i]->p_wf )
1259                 free( p_ogg->pp_stream[i]->p_wf );
1260 #endif
1261             free( p_ogg->pp_stream[i] );
1262         }
1263         if( p_ogg->pp_stream ) free( p_ogg->pp_stream );
1264
1265         free( p_ogg );
1266     }
1267 }
1268
1269 /*****************************************************************************
1270  * Demux: reads and demuxes data packets
1271  *****************************************************************************
1272  * Returns -1 in case of error, 0 in case of EOF, 1 otherwise
1273  *****************************************************************************/
1274 static int Demux( input_thread_t * p_input )
1275 {
1276     int i, i_stream, b_eos = 0;
1277     ogg_page    oggpage;
1278     ogg_packet  oggpacket;
1279     demux_sys_t *p_ogg  = (demux_sys_t *)p_input->p_demux_data;
1280
1281 #define p_stream p_ogg->pp_stream[i_stream]
1282     /* detect new selected/unselected streams */
1283     for( i_stream = 0; i_stream < p_ogg->i_streams; i_stream++ )
1284     {
1285         if( p_stream->p_es )
1286         {
1287             if( p_stream->p_es->p_decoder_fifo &&
1288                 !p_stream->i_activated )
1289             {
1290                 Ogg_StreamStart( p_input, p_ogg, i_stream );
1291             }
1292             else
1293             if( !p_stream->p_es->p_decoder_fifo &&
1294                 p_stream->i_activated )
1295             {
1296                 Ogg_StreamStop( p_input, p_ogg, i_stream );
1297             }
1298         }
1299     }
1300
1301     /* search for new video and audio stream to select
1302      * if current have been unselected */
1303     if( ( !p_ogg->p_stream_video )
1304             || ( !p_ogg->p_stream_video->p_es->p_decoder_fifo ) )
1305     {
1306         p_ogg->p_stream_video = NULL;
1307         for( i_stream = 0; i_stream < p_ogg->i_streams; i_stream++ )
1308         {
1309             if( ( p_stream->i_cat == VIDEO_ES )
1310                   &&( p_stream->p_es->p_decoder_fifo ) )
1311             {
1312                 p_ogg->p_stream_video = p_stream;
1313                 break;
1314             }
1315         }
1316     }
1317     if( ( !p_ogg->p_stream_audio )
1318             ||( !p_ogg->p_stream_audio->p_es->p_decoder_fifo ) )
1319     {
1320         p_ogg->p_stream_audio = NULL;
1321         for( i_stream = 0; i_stream < p_ogg->i_streams; i_stream++ )
1322         {
1323             if( ( p_stream->i_cat == AUDIO_ES )
1324                   &&( p_stream->p_es->p_decoder_fifo ) )
1325             {
1326                 p_ogg->p_stream_audio = p_stream;
1327                 break;
1328             }
1329         }
1330     }
1331
1332     if( p_input->stream.p_selected_program->i_synchro_state == SYNCHRO_REINIT )
1333     {
1334         msg_Warn( p_input, "synchro reinit" );
1335
1336         /* An ogg packet does only contain the starting date of the next
1337          * packet, not its own starting date.
1338          * As a quick work around, we just skip an oggpage */
1339
1340         for( i_stream = 0; i_stream < p_ogg->i_streams; i_stream++ )
1341         {
1342             /* we'll trash all the data until we find the next pcr */
1343             p_stream->b_reinit = 1;
1344             p_stream->i_pcr = -1;
1345             p_stream->i_interpolated_pcr = -1;
1346         }
1347         p_ogg->b_reinit = 1;
1348     }
1349
1350
1351     /*
1352      * Demux ogg pages from the stream
1353      */
1354     for( i = 0; i < PAGES_READ_ONCE || p_ogg->b_reinit;  i++ )
1355     {
1356         if( Ogg_ReadPage( p_input, p_ogg, &oggpage ) != VLC_SUCCESS )
1357         {
1358             b_eos = 1;
1359             break;
1360         }
1361
1362         for( i_stream = 0; i_stream < p_ogg->i_streams; i_stream++ )
1363         {
1364             if( ogg_stream_pagein( &p_stream->os, &oggpage ) != 0 )
1365                 continue;
1366
1367             while( ogg_stream_packetout( &p_stream->os, &oggpacket ) > 0 )
1368             {
1369                 if( !p_stream->p_es )
1370                 {
1371                     break;
1372                 }
1373
1374                 if( p_stream->b_reinit )
1375                 {
1376                     if( oggpacket.granulepos >= 0 )
1377                     {
1378                         p_stream->b_reinit = 0;
1379
1380                         /* Convert the next granulepos into a pcr */
1381                         Ogg_UpdatePCR( p_stream, &oggpacket );
1382
1383                         /* Call the pace control to reinitialize
1384                          * the system clock */
1385                          input_ClockManageRef( p_input,
1386                              p_input->stream.p_selected_program,
1387                              p_stream->i_pcr );
1388
1389                          if( (!p_ogg->p_stream_video ||
1390                               !p_ogg->p_stream_video->b_reinit) &&
1391                              (!p_ogg->p_stream_audio ||
1392                               !p_ogg->p_stream_audio->b_reinit) )
1393                          {
1394                              p_ogg->b_reinit = 0;
1395                          }
1396                     }
1397                     continue;
1398                 }
1399
1400                 Ogg_DecodePacket( p_input, p_stream, &oggpacket );
1401
1402             }
1403         }
1404     }
1405
1406     i_stream = 0;
1407     p_ogg->i_old_pcr = p_ogg->i_pcr;
1408     p_ogg->i_pcr = p_stream->i_interpolated_pcr;
1409     for( ; i_stream < p_ogg->i_streams; i_stream++ )
1410     {
1411         if( p_stream->i_cat == SPU_ES )
1412             continue;
1413
1414         if( p_stream->i_interpolated_pcr > 0
1415             && p_stream->i_interpolated_pcr < p_ogg->i_pcr )
1416             p_ogg->i_pcr = p_stream->i_interpolated_pcr;
1417     }
1418 #undef p_stream
1419
1420     /* This is for streams where the granulepos of the header packets
1421      * don't match these of the data packets (eg. ogg web radios). */
1422     if( p_ogg->i_old_pcr == 0 && p_ogg->i_pcr > 3 * DEFAULT_PTS_DELAY * 9/100 )
1423         p_input->stream.p_selected_program->i_synchro_state = SYNCHRO_REINIT;
1424
1425     /* Call the pace control */
1426     input_ClockManageRef( p_input, p_input->stream.p_selected_program,
1427                           p_ogg->i_pcr );
1428
1429     /* Did we reach the end of stream ? */
1430     return( b_eos ? 0 : 1 );
1431 }