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 1.35 2003/09/27 14:32:54 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
  41 /*****************************************************************************
  42  * Definitions of structures and functions used by this plugins
  43  *****************************************************************************/
  44 typedef struct logical_stream_s
  45 {
  46     ogg_stream_state os;                        /* logical stream of packets */
  47
  48     int              i_serial_no;
  49     int              i_cat;                            /* AUDIO_ES, VIDEO_ES */
  50     int              i_activated;
  51     vlc_fourcc_t     i_fourcc;
  52     vlc_fourcc_t     i_codec;
  53
  54     es_descriptor_t  *p_es;
  55     int              b_selected;                           /* newly selected */
  56
  57     /* the header of some logical streams (eg vorbis) contain essential
  58      * data for the decoder. We back them up here in case we need to re-feed
  59      * them to the decoder. */
  60     int              b_force_backup;
  61     int              i_packets_backup;
  62     ogg_packet       *p_packets_backup;
  63
  64     /* program clock reference (in units of 90kHz) derived from the previous
  65      * granulepos */
  66     mtime_t          i_pcr;
  67     mtime_t          i_interpolated_pcr;
  68     mtime_t          i_previous_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     int     b_reinit;
  99
 100     /* stream state */
 101     int     b_eos;
 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 /*****************************************************************************
 149  * Local prototypes
 150  *****************************************************************************/
 151 static int  Activate  ( vlc_object_t * );
 152 static void Deactivate( vlc_object_t * );
 153 static int  Demux     ( input_thread_t * );
 154
 155 /* Stream managment */
 156 static int  Ogg_ElemStreamStart  ( input_thread_t *, demux_sys_t *, int );
 157 static void Ogg_ElemStreamStop   ( input_thread_t *, demux_sys_t *, int );
 158
 159 /* Bitstream manipulation */
 160 static int  Ogg_Check        ( input_thread_t *p_input );
 161 static int  Ogg_ReadPage     ( input_thread_t *, demux_sys_t *, ogg_page * );
 162 static void Ogg_UpdatePCR    ( logical_stream_t *, ogg_packet * );
 163 static void Ogg_DecodePacket ( input_thread_t *p_input,
 164                                logical_stream_t *p_stream, ogg_packet * );
 165
 166 static int Ogg_BeginningOfStream( input_thread_t *p_input, demux_sys_t *p_ogg);
 167 static int Ogg_FindLogicalStreams( input_thread_t *p_input,demux_sys_t *p_ogg);
 168 static void Ogg_EndOfStream( input_thread_t *p_input, demux_sys_t *p_ogg );
 169
 170 /*****************************************************************************
 171  * Module descriptor
 172  *****************************************************************************/
 173 vlc_module_begin();
 174     set_description( _("ogg stream demuxer" ) );
 175     set_capability( "demux", 50 );
 176     set_callbacks( Activate, Deactivate );
 177     add_shortcut( "ogg" );
 178 vlc_module_end();
 179
 180 /*****************************************************************************
 181  * Stream managment
 182  *****************************************************************************/
 183 static int Ogg_ElemStreamStart( input_thread_t *p_input,
 184                                 demux_sys_t *p_ogg, int i_stream )
 185 {
 186 #define p_stream p_ogg->pp_stream[i_stream]
 187     if( !p_stream->p_es )
 188     {
 189         msg_Warn( p_input, "stream[%d] unselectable", i_stream );
 190         return( 0 );
 191     }
 192     if( p_stream->i_activated )
 193     {
 194         msg_Warn( p_input, "stream[%d] already selected", i_stream );
 195         return( 1 );
 196     }
 197
 198     if( !p_stream->p_es->p_decoder_fifo )
 199     {
 200         vlc_mutex_lock( &p_input->stream.stream_lock );
 201         input_SelectES( p_input, p_stream->p_es );
 202         vlc_mutex_unlock( &p_input->stream.stream_lock );
 203     }
 204     p_stream->i_activated = p_stream->p_es->p_decoder_fifo ? 1 : 0;
 205
 206     /* Feed the backup header to the decoder */
 207     if( !p_stream->b_force_backup )
 208     {
 209         int i;
 210         for( i = 0; i < p_stream->i_packets_backup; i++ )
 211         {
 212             /* Set correct starting date in the last header packet */
 213             if( i == p_stream->i_packets_backup -1 )
 214                 p_stream->p_packets_backup[i].granulepos =
 215                     p_stream->i_interpolated_pcr * p_stream->f_rate / 90000;
 216
 217             Ogg_DecodePacket( p_input, p_stream,
 218                               &p_stream->p_packets_backup[i] );
 219         }
 220     }
 221
 222     return( p_stream->i_activated );
 223 #undef  p_stream
 224 }
 225
 226 static void Ogg_ElemStreamStop( input_thread_t *p_input,
 227                                 demux_sys_t *p_ogg, int i_stream )
 228 {
 229 #define p_stream    p_ogg->pp_stream[i_stream]
 230
 231     if( !p_stream->i_activated )
 232     {
 233         msg_Warn( p_input, "stream[%d] already unselected", i_stream );
 234         return;
 235     }
 236
 237     if( p_stream->p_es->p_decoder_fifo )
 238     {
 239         vlc_mutex_lock( &p_input->stream.stream_lock );
 240         input_UnselectES( p_input, p_stream->p_es );
 241         vlc_mutex_unlock( &p_input->stream.stream_lock );
 242     }
 243
 244     p_stream->i_activated = 0;
 245
 246 #undef  p_stream
 247 }
 248
 249 /****************************************************************************
 250  * Ogg_Check: Check we are dealing with an ogg stream.
 251  ****************************************************************************/
 252 static int Ogg_Check( input_thread_t *p_input )
 253 {
 254     u8 *p_peek;
 255     int i_size = input_Peek( p_input, &p_peek, 4 );
 256
 257     /* Check for the Ogg capture pattern */
 258     if( !(i_size>3) || !(p_peek[0] == 'O') || !(p_peek[1] == 'g') ||
 259         !(p_peek[2] == 'g') || !(p_peek[3] == 'S') )
 260         return VLC_EGENERIC;
 261
 262     /* FIXME: Capture pattern might not be enough so we can also check for the
 263      * the first complete page */
 264
 265     return VLC_SUCCESS;
 266 }
 267
 268 /****************************************************************************
 269  * Ogg_ReadPage: Read a full Ogg page from the physical bitstream.
 270  ****************************************************************************
 271  * Returns VLC_SUCCESS if a page has been read. An error might happen if we
 272  * are at the end of stream.
 273  ****************************************************************************/
 274 static int Ogg_ReadPage( input_thread_t *p_input, demux_sys_t *p_ogg,
 275                          ogg_page *p_oggpage )
 276 {
 277     int i_read = 0;
 278     data_packet_t *p_data;
 279     byte_t *p_buffer;
 280
 281     while( ogg_sync_pageout( &p_ogg->oy, p_oggpage ) != 1 )
 282     {
 283         i_read = input_SplitBuffer( p_input, &p_data, OGG_BLOCK_SIZE );
 284         if( i_read <= 0 )
 285             return VLC_EGENERIC;
 286
 287         p_buffer = ogg_sync_buffer( &p_ogg->oy, i_read );
 288         p_input->p_vlc->pf_memcpy( p_buffer, p_data->p_payload_start, i_read );
 289         ogg_sync_wrote( &p_ogg->oy, i_read );
 290         input_DeletePacket( p_input->p_method_data, p_data );
 291     }
 292
 293     return VLC_SUCCESS;
 294 }
 295
 296 /****************************************************************************
 297  * Ogg_UpdatePCR: update the PCR (90kHz program clock reference) for the
 298  *                current stream.
 299  ****************************************************************************/
 300 static void Ogg_UpdatePCR( logical_stream_t *p_stream,
 301                            ogg_packet *p_oggpacket )
 302 {
 303     /* Convert the granulepos into a pcr */
 304     if( p_oggpacket->granulepos >= 0 )
 305     {
 306         if( p_stream->i_fourcc != VLC_FOURCC( 't','h','e','o' ) )
 307         {
 308             p_stream->i_pcr = p_oggpacket->granulepos * 90000
 309                               / p_stream->f_rate;
 310         }
 311         else
 312         {
 313             ogg_int64_t iframe = p_oggpacket->granulepos >>
 314               p_stream->i_theora_keyframe_granule_shift;
 315             ogg_int64_t pframe = p_oggpacket->granulepos -
 316               ( iframe << p_stream->i_theora_keyframe_granule_shift );
 317
 318             p_stream->i_pcr = ( iframe + pframe ) * 90000
 319                               / p_stream->f_rate;
 320         }
 321
 322         p_stream->i_interpolated_pcr = p_stream->i_pcr;
 323     }
 324     else
 325     {
 326         p_stream->i_pcr = -1;
 327
 328         /* no granulepos available, try to interpolate the pcr.
 329          * If we can't then don't touch the old value. */
 330         if( p_stream->i_cat == VIDEO_ES )
 331             /* 1 frame per packet */
 332             p_stream->i_interpolated_pcr += (90000 / p_stream->f_rate);
 333         else if( p_stream->i_bitrate )
 334             p_stream->i_interpolated_pcr += ( p_oggpacket->bytes * 90000
 335                                               / p_stream->i_bitrate / 8 );
 336     }
 337 }
 338
 339 /****************************************************************************
 340  * Ogg_DecodePacket: Decode an Ogg packet.
 341  ****************************************************************************/
 342 static void Ogg_DecodePacket( input_thread_t *p_input,
 343                               logical_stream_t *p_stream,
 344                               ogg_packet *p_oggpacket )
 345 {
 346     pes_packet_t  *p_pes;
 347     data_packet_t *p_data;
 348     vlc_bool_t b_trash = VLC_FALSE;
 349     int i_header_len = 0;
 350     mtime_t i_pts;
 351
 352     if( p_stream->b_force_backup )
 353     {
 354         ogg_packet *p_packet_backup;
 355         p_stream->i_packets_backup++;
 356         switch( p_stream->i_fourcc )
 357         {
 358         case VLC_FOURCC( 'v','o','r','b' ):
 359         case VLC_FOURCC( 't','h','e','o' ):
 360           if( p_stream->i_packets_backup == 3 ) p_stream->b_force_backup = 0;
 361           break;
 362
 363         default:
 364           p_stream->b_force_backup = 0;
 365           break;
 366         }
 367
 368         /* Backup the ogg packet (likely an header packet) */
 369         p_stream->p_packets_backup =
 370             realloc( p_stream->p_packets_backup, p_stream->i_packets_backup *
 371                      sizeof(ogg_packet) );
 372
 373         p_packet_backup =
 374             &p_stream->p_packets_backup[p_stream->i_packets_backup - 1];
 375
 376         p_packet_backup->bytes = p_oggpacket->bytes;
 377         if( p_stream->b_force_backup ) p_oggpacket->granulepos = -1;
 378         p_packet_backup->granulepos = p_oggpacket->granulepos;
 379         p_packet_backup->packet = malloc( p_oggpacket->bytes );
 380         if( !p_packet_backup->packet ) return;
 381         memcpy( p_packet_backup->packet, p_oggpacket->packet,
 382                 p_oggpacket->bytes );
 383     }
 384
 385     vlc_mutex_lock( &p_input->stream.control.control_lock );
 386     if( p_stream->i_cat == AUDIO_ES && p_input->stream.control.b_mute )
 387     {
 388         b_trash = VLC_TRUE;
 389     }
 390     vlc_mutex_unlock( &p_input->stream.control.control_lock );
 391
 392     /* Convert the pcr into a pts */
 393     if( p_stream->i_fourcc == VLC_FOURCC( 'v','o','r','b' ) )
 394     {
 395         if( p_stream->i_pcr >= 0 )
 396         {
 397             /* This is for streams where the granulepos of the header packets
 398              * doesn't match these of the data packets (eg. ogg web radios). */
 399             if( p_stream->i_previous_pcr == 0 &&
 400                 p_stream->i_pcr  > 3 * DEFAULT_PTS_DELAY * 9/100 )
 401                 p_input->stream.p_selected_program->i_synchro_state =
 402                     SYNCHRO_REINIT;
 403
 404             p_stream->i_previous_pcr = p_stream->i_pcr;
 405
 406             /* Call the pace control */
 407             if( p_input->stream.p_selected_program->i_synchro_state ==
 408                 SYNCHRO_REINIT )
 409             input_ClockManageRef( p_input,
 410                                   p_input->stream.p_selected_program,
 411                                   p_stream->i_pcr );
 412         }
 413
 414         /* The granulepos is the end date of the sample */
 415         i_pts = ( p_stream->i_pcr < 0 ) ? 0 :
 416             input_ClockGetTS( p_input, p_input->stream.p_selected_program,
 417                               p_stream->i_pcr );
 418
 419         /* Convert the granulepos into the next pcr */
 420         Ogg_UpdatePCR( p_stream, p_oggpacket );
 421     }
 422     else
 423     {
 424         /* Convert the granulepos into the current pcr */
 425         Ogg_UpdatePCR( p_stream, p_oggpacket );
 426
 427         if( p_stream->i_pcr >= 0 )
 428         {
 429             /* This is for streams where the granulepos of the header packets
 430              * doesn't match these of the data packets (eg. ogg web radios). */
 431             if( p_stream->i_previous_pcr == 0 &&
 432                 p_stream->i_pcr  > 3 * DEFAULT_PTS_DELAY * 9/100 )
 433                 p_input->stream.p_selected_program->i_synchro_state =
 434                     SYNCHRO_REINIT;
 435
 436             p_stream->i_previous_pcr = p_stream->i_pcr;
 437
 438             /* Call the pace control */
 439             if( p_input->stream.p_selected_program->i_synchro_state ==
 440                 SYNCHRO_REINIT )
 441             input_ClockManageRef( p_input,
 442                                   p_input->stream.p_selected_program,
 443                                   p_stream->i_pcr );
 444         }
 445
 446         /* The granulepos is the start date of the sample */
 447         i_pts = ( p_stream->i_pcr < 0 ) ? 0 :
 448             input_ClockGetTS( p_input, p_input->stream.p_selected_program,
 449                               p_stream->i_pcr );
 450     }
 451
 452     if( !p_stream->p_es->p_decoder_fifo || b_trash )
 453     {
 454         /* This stream isn't currently selected so we don't need to decode it,
 455          * but we did need to store its pcr as it might be selected later on */
 456         return;
 457     }
 458
 459     if( !( p_pes = input_NewPES( p_input->p_method_data ) ) )
 460     {
 461         return;
 462     }
 463     if( !( p_data = input_NewPacket( p_input->p_method_data,
 464                                      p_oggpacket->bytes ) ) )
 465     {
 466         input_DeletePES( p_input->p_method_data, p_pes );
 467         return;
 468     }
 469     p_data->p_payload_end = p_data->p_payload_start + p_oggpacket->bytes;
 470
 471     p_pes->i_nb_data = 1;
 472     p_pes->i_dts = p_pes->i_pts = i_pts;
 473     p_pes->p_first = p_pes->p_last = p_data;
 474     p_pes->i_pes_size = p_oggpacket->bytes;
 475
 476     if( p_stream->i_fourcc != VLC_FOURCC( 'v','o','r','b' ) &&
 477         p_stream->i_fourcc != VLC_FOURCC( 't','a','r','k' ) &&
 478         p_stream->i_fourcc != VLC_FOURCC( 't','h','e','o' ) )
 479     {
 480         /* Remove the header from the packet */
 481         i_header_len = (*p_oggpacket->packet & PACKET_LEN_BITS01) >> 6;
 482         i_header_len |= (*p_oggpacket->packet & PACKET_LEN_BITS2) << 1;
 483         i_header_len++;
 484
 485         p_pes->i_pes_size -= i_header_len;
 486     }
 487
 488     if( p_stream->i_fourcc == VLC_FOURCC( 't','a','r','k' ) )
 489     {
 490         /* FIXME: the biggest hack I've ever done */
 491         msg_Warn( p_input, "tark pts: "I64Fd", granule: "I64Fd,
 492                   p_pes->i_pts, p_pes->i_dts );
 493         msleep(10000);
 494     }
 495
 496     memcpy( p_data->p_payload_start,
 497             p_oggpacket->packet + i_header_len,
 498             p_oggpacket->bytes - i_header_len );
 499
 500     p_data->p_payload_end = p_data->p_payload_start + p_pes->i_pes_size;
 501     p_data->b_discard_payload = 0;
 502
 503     input_DecodePES( p_stream->p_es->p_decoder_fifo, p_pes );
 504 }
 505
 506 /****************************************************************************
 507  * Ogg_FindLogicalStreams: Find the logical streams embedded in the physical
 508  *                         stream and fill p_ogg.
 509  *****************************************************************************
 510  * The initial page of a logical stream is marked as a 'bos' page.
 511  * Furthermore, the Ogg specification mandates that grouped bitstreams begin
 512  * together and all of the initial pages must appear before any data pages.
 513  *
 514  * On success this function returns VLC_SUCCESS.
 515  ****************************************************************************/
 516 static int Ogg_FindLogicalStreams( input_thread_t *p_input, demux_sys_t *p_ogg)
 517 {
 518     ogg_packet oggpacket;
 519     ogg_page oggpage;
 520     int i_stream;
 521
 522     while( Ogg_ReadPage( p_input, p_ogg, &oggpage ) == VLC_SUCCESS )
 523     {
 524         if( ogg_page_bos( &oggpage ) )
 525         {
 526
 527             /* All is wonderful in our fine fine little world.
 528              * We found the beginning of our first logical stream. */
 529             while( ogg_page_bos( &oggpage ) )
 530             {
 531                 p_ogg->i_streams++;
 532                 p_ogg->pp_stream =
 533                     realloc( p_ogg->pp_stream, p_ogg->i_streams *
 534                              sizeof(logical_stream_t *) );
 535
 536 #define p_stream p_ogg->pp_stream[p_ogg->i_streams - 1]
 537
 538                 p_stream = malloc( sizeof(logical_stream_t) );
 539                 memset( p_stream, 0, sizeof(logical_stream_t) );
 540
 541                 /* Setup the logical stream */
 542                 p_stream->i_serial_no = ogg_page_serialno( &oggpage );
 543                 ogg_stream_init( &p_stream->os, p_stream->i_serial_no );
 544
 545                 /* Extract the initial header from the first page and verify
 546                  * the codec type of tis Ogg bitstream */
 547                 if( ogg_stream_pagein( &p_stream->os, &oggpage ) < 0 )
 548                 {
 549                     /* error. stream version mismatch perhaps */
 550                     msg_Err( p_input, "Error reading first page of "
 551                              "Ogg bitstream data" );
 552                     return VLC_EGENERIC;
 553                 }
 554
 555                 /* FIXME: check return value */
 556                 ogg_stream_packetpeek( &p_stream->os, &oggpacket );
 557
 558                 /* Check for Vorbis header */
 559                 if( oggpacket.bytes >= 7 &&
 560                     ! strncmp( &oggpacket.packet[1], "vorbis", 6 ) )
 561                 {
 562                     oggpack_buffer opb;
 563
 564                     msg_Dbg( p_input, "found vorbis header" );
 565                     p_stream->i_cat = AUDIO_ES;
 566                     p_stream->i_fourcc = VLC_FOURCC( 'v','o','r','b' );
 567
 568                     /* Signal that we want to keep a backup of the vorbis
 569                      * stream headers. They will be used when switching between
 570                      * audio streams. */
 571                     p_stream->b_force_backup = 1;
 572
 573                     /* Cheat and get additionnal info ;) */
 574                     oggpack_readinit( &opb, oggpacket.packet, oggpacket.bytes);
 575                     oggpack_adv( &opb, 88 );
 576                     p_stream->i_channels = oggpack_read( &opb, 8 );
 577                     p_stream->f_rate = oggpack_read( &opb, 32 );
 578                     oggpack_adv( &opb, 32 );
 579                     p_stream->i_bitrate = oggpack_read( &opb, 32 );
 580                     {
 581                         char title[sizeof("Stream") + 10];
 582                         input_info_category_t *p_cat;
 583                         sprintf( title, "Stream %d", p_ogg->i_streams );
 584                         p_cat = input_InfoCategory( p_input, title );
 585                         input_AddInfo( p_cat, _("Type"), _("Audio") );
 586                         input_AddInfo( p_cat, _("Codec"), _("Vorbis") );
 587                         input_AddInfo( p_cat, _("Sample Rate"), "%f",
 588                                        p_stream->f_rate );
 589                         input_AddInfo( p_cat, _("Channels"), "%d",
 590                                        p_stream->i_channels );
 591                         input_AddInfo( p_cat, _("Bit Rate"), "%d",
 592                                        p_stream->i_bitrate );
 593                     }
 594                 }
 595                 /* Check for Theora header */
 596                 else if( oggpacket.bytes >= 7 &&
 597                          ! strncmp( &oggpacket.packet[1], "theora", 6 ) )
 598                 {
 599 #ifdef HAVE_OGGPACKB
 600                     oggpack_buffer opb;
 601                     int i_fps_numerator;
 602                     int i_fps_denominator;
 603                     int i_keyframe_frequency_force;
 604 #endif
 605
 606                     msg_Dbg( p_input, "found theora header" );
 607 #ifdef HAVE_OGGPACKB
 608                     p_stream->i_cat = VIDEO_ES;
 609                     p_stream->i_fourcc = VLC_FOURCC( 't','h','e','o' );
 610
 611                     /* Signal that we want to keep a backup of the vorbis
 612                      * stream headers. They will be used when switching between
 613                      * audio streams. */
 614                     p_stream->b_force_backup = 1;
 615
 616                     /* Cheat and get additionnal info ;) */
 617                     oggpackB_readinit(&opb, oggpacket.packet, oggpacket.bytes);
 618                     oggpackB_adv( &opb, 56 );
 619                     oggpackB_read( &opb, 8 ); /* major version num */
 620                     oggpackB_read( &opb, 8 ); /* minor version num */
 621                     oggpackB_read( &opb, 8 ); /* subminor version num */
 622                     oggpackB_read( &opb, 16 ) /*<< 4*/; /* width */
 623                     oggpackB_read( &opb, 16 ) /*<< 4*/; /* height */
 624                     oggpackB_read( &opb, 24 ); /* frame width */
 625                     oggpackB_read( &opb, 24 ); /* frame height */
 626                     oggpackB_read( &opb, 8 ); /* x offset */
 627                     oggpackB_read( &opb, 8 ); /* y offset */
 628
 629                     i_fps_numerator = oggpackB_read( &opb, 32 );
 630                     i_fps_denominator = oggpackB_read( &opb, 32 );
 631                     oggpackB_read( &opb, 24 ); /* aspect_numerator */
 632                     oggpackB_read( &opb, 24 ); /* aspect_denominator */
 633                     i_keyframe_frequency_force = 1 << oggpackB_read( &opb, 5 );
 634                     oggpackB_read( &opb, 8 ); /* colorspace */
 635                     p_stream->i_bitrate = oggpackB_read( &opb, 24 );
 636                     oggpackB_read( &opb, 6 ); /* quality */
 637
 638                     /* granule_shift = i_log( frequency_force -1 ) */
 639                     p_stream->i_theora_keyframe_granule_shift = 0;
 640                     i_keyframe_frequency_force--;
 641                     while( i_keyframe_frequency_force )
 642                     {
 643                         p_stream->i_theora_keyframe_granule_shift++;
 644                         i_keyframe_frequency_force >>= 1;
 645                     }
 646
 647                     p_stream->f_rate = ((float)i_fps_numerator) /
 648                                                 i_fps_denominator;
 649                     msg_Dbg( p_input,
 650                              "found theora header, bitrate: %i, rate: %f",
 651                              p_stream->i_bitrate, p_stream->f_rate );
 652                     {
 653                         char title[sizeof("Stream") + 10];
 654                         input_info_category_t *p_cat;
 655                         sprintf( title, "Stream %d", p_ogg->i_streams );
 656                         p_cat = input_InfoCategory( p_input, title );
 657                         input_AddInfo( p_cat, _("Type"), _("Video") );
 658                         input_AddInfo( p_cat, _("Codec"), _("Theora") );
 659                         input_AddInfo( p_cat, _("Frame Rate"), "%f",
 660                                        p_stream->f_rate );
 661                         input_AddInfo( p_cat, _("Bit Rate"), "%d",
 662                                        p_stream->i_bitrate );
 663                     }
 664 #else /* HAVE_OGGPACKB */
 665                     msg_Dbg( p_input, "the ogg demuxer has been compiled "
 666                              "without support for the oggpackB extension."
 667                              "The theora stream won't be decoded." );
 668                     free( p_stream );
 669                     p_ogg->i_streams--;
 670                     continue;
 671 #endif /* HAVE_OGGPACKB */
 672                 }
 673                 /* Check for Tarkin header */
 674                 else if( oggpacket.bytes >= 7 &&
 675                          ! strncmp( &oggpacket.packet[1], "tarkin", 6 ) )
 676                 {
 677                     oggpack_buffer opb;
 678
 679                     msg_Dbg( p_input, "found tarkin header" );
 680                     p_stream->i_cat = VIDEO_ES;
 681                     p_stream->i_fourcc = VLC_FOURCC( 't','a','r','k' );
 682
 683                     /* Cheat and get additionnal info ;) */
 684                     oggpack_readinit( &opb, oggpacket.packet, oggpacket.bytes);
 685                     oggpack_adv( &opb, 88 );
 686                     oggpack_adv( &opb, 104 );
 687                     p_stream->i_bitrate = oggpack_read( &opb, 32 );
 688                     p_stream->f_rate = 2; /* FIXME */
 689                     msg_Dbg( p_input,
 690                              "found tarkin header, bitrate: %i, rate: %f",
 691                              p_stream->i_bitrate, p_stream->f_rate );
 692                                         {
 693                         char title[sizeof("Stream") + 10];
 694                         input_info_category_t *p_cat;
 695                         sprintf( title, "Stream %d", p_ogg->i_streams );
 696                         p_cat = input_InfoCategory( p_input, title );
 697                         input_AddInfo( p_cat, _("Type"), _("Video") );
 698                         input_AddInfo( p_cat, _("Codec"), _("tarkin") );
 699                         input_AddInfo( p_cat, _("Sample Rate"), "%f",
 700                                        p_stream->f_rate );
 701                         input_AddInfo( p_cat, _("Bit Rate"), "%d",
 702                                        p_stream->i_bitrate );
 703                     }
 704
 705                 }
 706                 else if( oggpacket.bytes >= 142 &&
 707                          !strncmp( &oggpacket.packet[1],
 708                                    "Direct Show Samples embedded in Ogg", 35 ))
 709                 {
 710                     /* Old header type */
 711
 712                     /* Check for video header (old format) */
 713                     if( GetDWLE((oggpacket.packet+96)) == 0x05589f80 &&
 714                         oggpacket.bytes >= 184 )
 715                     {
 716                         p_stream->i_cat = VIDEO_ES;
 717
 718                         p_stream->p_bih = (BITMAPINFOHEADER *)
 719                             malloc( sizeof(BITMAPINFOHEADER) );
 720                         if( !p_stream->p_bih )
 721                         {
 722                             /* Mem allocation error, just ignore the stream */
 723                             free( p_stream );
 724                             p_ogg->i_streams--;
 725                             continue;
 726                         }
 727                         p_stream->p_bih->biSize = sizeof(BITMAPINFOHEADER);
 728                         p_stream->p_bih->biCompression= p_stream->i_fourcc =
 729                             VLC_FOURCC( oggpacket.packet[68],
 730                                         oggpacket.packet[69],
 731                                         oggpacket.packet[70],
 732                                         oggpacket.packet[71] );
 733                         msg_Dbg( p_input, "found video header of type: %.4s",
 734                                  (char *)&p_stream->i_fourcc );
 735
 736                         p_stream->f_rate = 10000000.0 /
 737                             GetQWLE((oggpacket.packet+164));
 738                         p_stream->p_bih->biBitCount =
 739                             GetWLE((oggpacket.packet+182));
 740                         if( !p_stream->p_bih->biBitCount )
 741                             p_stream->p_bih->biBitCount=24; // hack, FIXME
 742                         p_stream->p_bih->biWidth =
 743                             GetDWLE((oggpacket.packet+176));
 744                         p_stream->p_bih->biHeight =
 745                             GetDWLE((oggpacket.packet+180));
 746                         p_stream->p_bih->biPlanes= 1 ;
 747                         p_stream->p_bih->biSizeImage =
 748                             (p_stream->p_bih->biBitCount >> 3) *
 749                             p_stream->p_bih->biWidth *
 750                             p_stream->p_bih->biHeight;
 751
 752                         msg_Dbg( p_input,
 753                              "fps: %f, width:%i; height:%i, bitcount:%i",
 754                             p_stream->f_rate, p_stream->p_bih->biWidth,
 755                             p_stream->p_bih->biHeight,
 756                             p_stream->p_bih->biBitCount);
 757                         {
 758                             char title[sizeof("Stream") + 10];
 759                             input_info_category_t *p_cat;
 760                             sprintf( title, "Stream %d", p_ogg->i_streams );
 761                             p_cat = input_InfoCategory( p_input, title );
 762                             input_AddInfo( p_cat, _("Type"), _("Video") );
 763                             input_AddInfo( p_cat, _("Codec"), "%.4s",
 764                                            (char *)&p_stream->i_fourcc );
 765                             input_AddInfo( p_cat, _("Frame Rate"), "%f",
 766                                            p_stream->f_rate );
 767                             input_AddInfo( p_cat, _("Bit Count"), "%d",
 768                                            p_stream->p_bih->biBitCount );
 769                             input_AddInfo( p_cat, _("Width"), "%d",
 770                                            p_stream->p_bih->biWidth );
 771                             input_AddInfo( p_cat, _("Height"), "%d",
 772                                            p_stream->p_bih->biHeight );
 773                         }
 774                         p_stream->i_bitrate = 0;
 775                     }
 776                     /* Check for audio header (old format) */
 777                     else if( GetDWLE((oggpacket.packet+96)) == 0x05589F81 )
 778                     {
 779                         unsigned int i_extra_size;
 780
 781                         p_stream->i_cat = AUDIO_ES;
 782
 783                         i_extra_size = GetWLE((oggpacket.packet+140));
 784
 785                         p_stream->p_wf = (WAVEFORMATEX *)
 786                             malloc( sizeof(WAVEFORMATEX) + i_extra_size );
 787                         if( !p_stream->p_wf )
 788                         {
 789                             /* Mem allocation error, just ignore the stream */
 790                             free( p_stream );
 791                             p_ogg->i_streams--;
 792                             continue;
 793                         }
 794
 795                         p_stream->p_wf->wFormatTag =
 796                             GetWLE((oggpacket.packet+124));
 797                         p_stream->p_wf->nChannels =
 798                             GetWLE((oggpacket.packet+126));
 799                         p_stream->f_rate = p_stream->p_wf->nSamplesPerSec =
 800                             GetDWLE((oggpacket.packet+128));
 801                         p_stream->i_bitrate = p_stream->p_wf->nAvgBytesPerSec =
 802                             GetDWLE((oggpacket.packet+132));
 803                         p_stream->i_bitrate *= 8;
 804                         p_stream->p_wf->nBlockAlign =
 805                             GetWLE((oggpacket.packet+136));
 806                         p_stream->p_wf->wBitsPerSample =
 807                             GetWLE((oggpacket.packet+138));
 808                         p_stream->p_wf->cbSize = i_extra_size;
 809
 810                         if( i_extra_size > 0 )
 811                             memcpy( p_stream->p_wf+sizeof(WAVEFORMATEX),
 812                                     oggpacket.packet+142, i_extra_size );
 813
 814                         switch( p_stream->p_wf->wFormatTag )
 815                         {
 816                         case WAVE_FORMAT_PCM:
 817                             p_stream->i_fourcc =
 818                                 VLC_FOURCC( 'a', 'r', 'a', 'w' );
 819                             break;
 820                         case WAVE_FORMAT_MPEG:
 821                         case WAVE_FORMAT_MPEGLAYER3:
 822                             p_stream->i_fourcc =
 823                                 VLC_FOURCC( 'm', 'p', 'g', 'a' );
 824                             break;
 825                         case WAVE_FORMAT_A52:
 826                             p_stream->i_fourcc =
 827                                 VLC_FOURCC( 'a', '5', '2', ' ' );
 828                             break;
 829                         case WAVE_FORMAT_WMA1:
 830                             p_stream->i_fourcc =
 831                                 VLC_FOURCC( 'w', 'm', 'a', '1' );
 832                             break;
 833                         case WAVE_FORMAT_WMA2:
 834                             p_stream->i_fourcc =
 835                                 VLC_FOURCC( 'w', 'm', 'a', '2' );
 836                             break;
 837                         default:
 838                             p_stream->i_fourcc = VLC_FOURCC( 'm', 's',
 839                                 ( p_stream->p_wf->wFormatTag >> 8 ) & 0xff,
 840                                 p_stream->p_wf->wFormatTag & 0xff );
 841                         }
 842
 843                         msg_Dbg( p_input, "found audio header of type: %.4s",
 844                                  (char *)&p_stream->i_fourcc );
 845                         msg_Dbg( p_input, "audio:0x%4.4x channels:%d %dHz "
 846                                  "%dbits/sample %dkb/s",
 847                                  p_stream->p_wf->wFormatTag,
 848                                  p_stream->p_wf->nChannels,
 849                                  p_stream->p_wf->nSamplesPerSec,
 850                                  p_stream->p_wf->wBitsPerSample,
 851                                  p_stream->p_wf->nAvgBytesPerSec * 8 / 1024 );
 852                         {
 853                             char title[sizeof("Stream") + 10];
 854                             input_info_category_t *p_cat;
 855                             sprintf( title, "Stream %d", p_ogg->i_streams );
 856                             p_cat = input_InfoCategory( p_input, title );
 857                             input_AddInfo( p_cat, _("Type"), _("Audio") );
 858                             input_AddInfo( p_cat, _("Codec"), "%.4s",
 859                                            (char *)&p_stream->i_fourcc );
 860                             input_AddInfo( p_cat, _("Sample Rate"), "%d",
 861                                            p_stream->p_wf->nSamplesPerSec );
 862                             input_AddInfo( p_cat, _("Bit Rate"), "%d",
 863                                            p_stream->p_wf->nAvgBytesPerSec * 8
 864                                               / 1024 );
 865                             input_AddInfo( p_cat, _("Channels"), "%d",
 866                                            p_stream->p_wf->nChannels );
 867                             input_AddInfo( p_cat, _("Bits per Sample"), "%d",
 868                                            p_stream->p_wf->wBitsPerSample );
 869                         }
 870
 871                     }
 872                     else
 873                     {
 874                         msg_Dbg( p_input, "stream %d has an old header "
 875                             "but is of an unknown type", p_ogg->i_streams-1 );
 876                         free( p_stream );
 877                         p_ogg->i_streams--;
 878                     }
 879                 }
 880                 else if( (*oggpacket.packet & PACKET_TYPE_BITS )
 881                          == PACKET_TYPE_HEADER &&
 882                          oggpacket.bytes >= (int)sizeof(stream_header)+1 )
 883                 {
 884                     stream_header *st = (stream_header *)(oggpacket.packet+1);
 885
 886                     /* Check for video header (new format) */
 887                     if( !strncmp( st->streamtype, "video", 5 ) )
 888                     {
 889                         p_stream->i_cat = VIDEO_ES;
 890
 891                         /* We need to get rid of the header packet */
 892                         ogg_stream_packetout( &p_stream->os, &oggpacket );
 893
 894                         p_stream->p_bih = (BITMAPINFOHEADER *)
 895                             malloc( sizeof(BITMAPINFOHEADER) );
 896                         if( !p_stream->p_bih )
 897                         {
 898                             /* Mem allocation error, just ignore the stream */
 899                             free( p_stream );
 900                             p_ogg->i_streams--;
 901                             continue;
 902                         }
 903                         p_stream->p_bih->biSize = sizeof(BITMAPINFOHEADER);
 904                         p_stream->p_bih->biCompression=
 905                             p_stream->i_fourcc = VLC_FOURCC( st->subtype[0],
 906                                                              st->subtype[1],
 907                                                              st->subtype[2],
 908                                                              st->subtype[3] );
 909                         msg_Dbg( p_input, "found video header of type: %.4s",
 910                                  (char *)&p_stream->i_fourcc );
 911
 912                         p_stream->f_rate = 10000000.0 /
 913                             GetQWLE(&st->time_unit);
 914                         p_stream->p_bih->biBitCount =
 915                             GetWLE(&st->bits_per_sample);
 916                         p_stream->p_bih->biWidth =
 917                             GetDWLE(&st->sh.video.width);
 918                         p_stream->p_bih->biHeight =
 919                             GetDWLE(&st->sh.video.height);
 920                         p_stream->p_bih->biPlanes= 1 ;
 921                         p_stream->p_bih->biSizeImage =
 922                             (p_stream->p_bih->biBitCount >> 3) *
 923                             p_stream->p_bih->biWidth *
 924                             p_stream->p_bih->biHeight;
 925
 926                         msg_Dbg( p_input,
 927                              "fps: %f, width:%i; height:%i, bitcount:%i",
 928                             p_stream->f_rate, p_stream->p_bih->biWidth,
 929                             p_stream->p_bih->biHeight,
 930                             p_stream->p_bih->biBitCount);
 931
 932                         {
 933                             char title[sizeof("Stream") + 10];
 934                             input_info_category_t *p_cat;
 935                             sprintf( title, "Stream %d", p_ogg->i_streams );
 936                             p_cat = input_InfoCategory( p_input, title );
 937                             input_AddInfo( p_cat, _("Type"), _("Video") );
 938                             input_AddInfo( p_cat, _("Codec"), "%.4s",
 939                                            (char *)&p_stream->i_fourcc );
 940                             input_AddInfo( p_cat, _("Frame Rate"), "%f",
 941                                            p_stream->f_rate );
 942                             input_AddInfo( p_cat, _("Bit Count"), "%d",
 943                                            p_stream->p_bih->biBitCount );
 944                             input_AddInfo( p_cat, _("Width"), "%d",
 945                                            p_stream->p_bih->biWidth );
 946                             input_AddInfo( p_cat, _("Height"), "%d",
 947                                            p_stream->p_bih->biHeight );
 948                         }
 949                         p_stream->i_bitrate = 0;
 950                     }
 951                     /* Check for audio header (new format) */
 952                     else if( !strncmp( st->streamtype, "audio", 5 ) )
 953                     {
 954                         char p_buffer[5];
 955
 956                         p_stream->i_cat = AUDIO_ES;
 957
 958                         /* We need to get rid of the header packet */
 959                         ogg_stream_packetout( &p_stream->os, &oggpacket );
 960
 961                         p_stream->p_wf = (WAVEFORMATEX *)
 962                             malloc( sizeof(WAVEFORMATEX) );
 963                         if( !p_stream->p_wf )
 964                         {
 965                             /* Mem allocation error, just ignore the stream */
 966                             free( p_stream );
 967                             p_ogg->i_streams--;
 968                             continue;
 969                         }
 970
 971                         memcpy( p_buffer, st->subtype, 4 );
 972                         p_buffer[4] = '\0';
 973                         p_stream->p_wf->wFormatTag = strtol(p_buffer,NULL,16);
 974                         p_stream->p_wf->nChannels =
 975                             GetWLE(&st->sh.audio.channels);
 976                         p_stream->f_rate = p_stream->p_wf->nSamplesPerSec =
 977                             GetQWLE(&st->samples_per_unit);
 978                         p_stream->i_bitrate = p_stream->p_wf->nAvgBytesPerSec =
 979                             GetDWLE(&st->sh.audio.avgbytespersec);
 980                         p_stream->i_bitrate *= 8;
 981                         p_stream->p_wf->nBlockAlign =
 982                             GetWLE(&st->sh.audio.blockalign);
 983                         p_stream->p_wf->wBitsPerSample =
 984                             GetWLE(&st->bits_per_sample);
 985                         p_stream->p_wf->cbSize = 0;
 986
 987                         switch( p_stream->p_wf->wFormatTag )
 988                         {
 989                         case WAVE_FORMAT_PCM:
 990                             p_stream->i_fourcc =
 991                                 VLC_FOURCC( 'a', 'r', 'a', 'w' );
 992                             break;
 993                         case WAVE_FORMAT_MPEG:
 994                         case WAVE_FORMAT_MPEGLAYER3:
 995                             p_stream->i_fourcc =
 996                                 VLC_FOURCC( 'm', 'p', 'g', 'a' );
 997                             break;
 998                         case WAVE_FORMAT_A52:
 999                             p_stream->i_fourcc =
1000                                 VLC_FOURCC( 'a', '5', '2', ' ' );
1001                             break;
1002                         case WAVE_FORMAT_WMA1:
1003                             p_stream->i_fourcc =
1004                                 VLC_FOURCC( 'w', 'm', 'a', '1' );
1005                             break;
1006                         case WAVE_FORMAT_WMA2:
1007                             p_stream->i_fourcc =
1008                                 VLC_FOURCC( 'w', 'm', 'a', '2' );
1009                             break;
1010                         default:
1011                             p_stream->i_fourcc = VLC_FOURCC( 'm', 's',
1012                                 ( p_stream->p_wf->wFormatTag >> 8 ) & 0xff,
1013                                 p_stream->p_wf->wFormatTag & 0xff );
1014                         }
1015
1016                         msg_Dbg( p_input, "found audio header of type: %.4s",
1017                                  (char *)&p_stream->i_fourcc );
1018                         msg_Dbg( p_input, "audio:0x%4.4x channels:%d %dHz "
1019                                  "%dbits/sample %dkb/s",
1020                                  p_stream->p_wf->wFormatTag,
1021                                  p_stream->p_wf->nChannels,
1022                                  p_stream->p_wf->nSamplesPerSec,
1023                                  p_stream->p_wf->wBitsPerSample,
1024                                  p_stream->p_wf->nAvgBytesPerSec * 8 / 1024 );
1025                         {
1026                             char title[sizeof("Stream") + 10];
1027                             input_info_category_t *p_cat;
1028                             sprintf( title, "Stream %d", p_ogg->i_streams );
1029                             p_cat = input_InfoCategory( p_input, title );
1030                             input_AddInfo( p_cat, _("Type"), _("Audio") );
1031                             input_AddInfo( p_cat, _("Codec"), "%.4s",
1032                                            (char *)&p_stream->i_fourcc );
1033                             input_AddInfo( p_cat, _("Sample Rate"), "%d",
1034                                            p_stream->p_wf->nSamplesPerSec );
1035                             input_AddInfo( p_cat, _("Bit Rate"), "%d",
1036                                            p_stream->p_wf->nAvgBytesPerSec * 8
1037                                               / 1024 );
1038                             input_AddInfo( p_cat, _("Channels"), "%d",
1039                                            p_stream->p_wf->nChannels );
1040                             input_AddInfo( p_cat, _("Bits per Sample"), "%d",
1041                                            p_stream->p_wf->wBitsPerSample );
1042                         }
1043                     }
1044                     /* Check for text (subtitles) header */
1045                     else if( !strncmp(st->streamtype, "text", 4) )
1046                     {
1047                         /* We need to get rid of the header packet */
1048                         ogg_stream_packetout( &p_stream->os, &oggpacket );
1049
1050                         msg_Dbg( p_input, "found text subtitles header" );
1051                         p_stream->i_cat = SPU_ES;
1052                         p_stream->i_fourcc =
1053                             VLC_FOURCC( 's', 'u', 'b', 't' );
1054                         p_stream->f_rate = 1000; /* granulepos is in milisec */
1055                     }
1056                     else
1057                     {
1058                         msg_Dbg( p_input, "stream %d has a header marker "
1059                             "but is of an unknown type", p_ogg->i_streams-1 );
1060                         free( p_stream );
1061                         p_ogg->i_streams--;
1062                     }
1063                 }
1064                 else
1065                 {
1066                     msg_Dbg( p_input, "stream %d is of unknown type",
1067                              p_ogg->i_streams-1 );
1068                     free( p_stream );
1069                     p_ogg->i_streams--;
1070                 }
1071
1072 #undef p_stream
1073
1074                 if( Ogg_ReadPage( p_input, p_ogg, &oggpage ) != VLC_SUCCESS )
1075                     return VLC_EGENERIC;
1076             }
1077
1078             /* This is the first data page, which means we are now finished
1079              * with the initial pages. We just need to store it in the relevant
1080              * bitstream. */
1081             for( i_stream = 0; i_stream < p_ogg->i_streams; i_stream++ )
1082             {
1083                 if( ogg_stream_pagein( &p_ogg->pp_stream[i_stream]->os,
1084                                        &oggpage ) == 0 )
1085                 {
1086                     break;
1087                 }
1088             }
1089             return VLC_SUCCESS;
1090         }
1091     }
1092     return VLC_EGENERIC;
1093 }
1094
1095 /*****************************************************************************
1096  * Activate: initializes ogg demux structures
1097  *****************************************************************************/
1098 static int Activate( vlc_object_t * p_this )
1099 {
1100     input_thread_t *p_input = (input_thread_t *)p_this;
1101     demux_sys_t    *p_ogg;
1102     int            b_forced;
1103
1104     p_input->p_demux_data = NULL;
1105     b_forced = ( ( *p_input->psz_demux )&&
1106                  ( !strncmp( p_input->psz_demux, "ogg", 10 ) ) ) ? 1 : 0;
1107
1108     /* Check if we are dealing with an ogg stream */
1109     if( !b_forced && ( Ogg_Check( p_input ) != VLC_SUCCESS ) )
1110         return -1;
1111
1112     /* Allocate p_ogg */
1113     if( !( p_ogg = malloc( sizeof( demux_sys_t ) ) ) )
1114     {
1115         msg_Err( p_input, "out of memory" );
1116         goto error;
1117     }
1118     memset( p_ogg, 0, sizeof( demux_sys_t ) );
1119     p_input->p_demux_data = p_ogg;
1120     p_ogg->pp_stream = NULL;
1121     p_ogg->p_stream_video = NULL;
1122     p_ogg->p_stream_audio = NULL;
1123     p_ogg->p_stream_spu = NULL;
1124
1125     /* Initialize the Ogg physical bitstream parser */
1126     ogg_sync_init( &p_ogg->oy );
1127
1128     /* Set exported function */
1129     p_input->pf_demux = Demux;
1130
1131     /* Initialize access plug-in structures. */
1132     if( p_input->i_mtu == 0 )
1133     {
1134         /* Improve speed. */
1135         p_input->i_bufsize = INPUT_DEFAULT_BUFSIZE;
1136     }
1137
1138     /* Create one program */
1139     vlc_mutex_lock( &p_input->stream.stream_lock );
1140     if( input_InitStream( p_input, 0 ) == -1)
1141     {
1142         vlc_mutex_unlock( &p_input->stream.stream_lock );
1143         msg_Err( p_input, "cannot init stream" );
1144         goto error;
1145     }
1146     if( input_AddProgram( p_input, 0, 0) == NULL )
1147     {
1148         vlc_mutex_unlock( &p_input->stream.stream_lock );
1149         msg_Err( p_input, "cannot add program" );
1150         goto error;
1151     }
1152     p_input->stream.p_selected_program = p_input->stream.pp_programs[0];
1153     vlc_mutex_unlock( &p_input->stream.stream_lock );
1154
1155     /* Begnning of stream, tell the demux to look for elementary streams. */
1156     p_ogg->b_eos = VLC_TRUE;
1157
1158     return 0;
1159
1160  error:
1161     Deactivate( (vlc_object_t *)p_input );
1162     return -1;
1163
1164 }
1165
1166 /****************************************************************************
1167  * Ogg_EndOfStream: Look for Beginning of Stream ogg pages and add Elementary
1168  *                  streams.
1169  ****************************************************************************/
1170 static int Ogg_BeginningOfStream( input_thread_t *p_input, demux_sys_t *p_ogg)
1171 {
1172     int i_stream;
1173
1174     /* Find the logical streams embedded in the physical stream and
1175      * initialize our p_ogg structure. */
1176     if( Ogg_FindLogicalStreams( p_input, p_ogg ) != VLC_SUCCESS )
1177     {
1178         msg_Warn( p_input, "couldn't find any ogg logical stream" );
1179         return VLC_EGENERIC;
1180     }
1181
1182     vlc_mutex_lock( &p_input->stream.stream_lock );
1183     p_input->stream.i_mux_rate = 0;
1184     vlc_mutex_unlock( &p_input->stream.stream_lock );
1185
1186     for( i_stream = 0 ; i_stream < p_ogg->i_streams; i_stream++ )
1187     {
1188 #define p_stream p_ogg->pp_stream[i_stream]
1189         vlc_mutex_lock( &p_input->stream.stream_lock );
1190         p_stream->p_es = input_AddES( p_input,
1191                                       p_input->stream.p_selected_program,
1192                                       i_stream,
1193                                       p_stream->i_cat, NULL, 0 );
1194         p_input->stream.i_mux_rate += (p_stream->i_bitrate / ( 8 * 50 ));
1195         vlc_mutex_unlock( &p_input->stream.stream_lock );
1196         p_stream->p_es->i_stream_id = i_stream;
1197         p_stream->p_es->i_fourcc = p_stream->i_fourcc;
1198         p_stream->p_es->p_waveformatex      = (void*)p_stream->p_wf;
1199         p_stream->p_es->p_bitmapinfoheader  = (void*)p_stream->p_bih;
1200
1201         p_stream->i_pcr  = p_stream->i_previous_pcr = -1;
1202 #undef p_stream
1203     }
1204
1205     for( i_stream = 0; i_stream < p_ogg->i_streams; i_stream++ )
1206     {
1207 #define p_stream  p_ogg->pp_stream[i_stream]
1208         switch( p_stream->p_es->i_cat )
1209         {
1210             case( VIDEO_ES ):
1211                 if( (p_ogg->p_stream_video == NULL) )
1212                 {
1213                     p_ogg->p_stream_video = p_stream;
1214                     /* TODO add test to see if a decoder has been found */
1215                     Ogg_ElemStreamStart( p_input, p_ogg, i_stream );
1216                 }
1217                 break;
1218
1219             case( AUDIO_ES ):
1220                 if( (p_ogg->p_stream_audio == NULL) )
1221                 {
1222                     int i_audio = config_GetInt( p_input, "audio-channel" );
1223                     if( i_audio == i_stream || i_audio <= 0 ||
1224                         i_audio >= p_ogg->i_streams ||
1225                         p_ogg->pp_stream[i_audio]->p_es->i_cat != AUDIO_ES )
1226                     {
1227                         p_ogg->p_stream_audio = p_stream;
1228                         Ogg_ElemStreamStart( p_input, p_ogg, i_stream );
1229                     }
1230                 }
1231                 break;
1232
1233             case( SPU_ES ):
1234                 if( (p_ogg->p_stream_spu == NULL) )
1235                 {
1236                     /* for spu, default is none */
1237                     int i_spu = config_GetInt( p_input, "spu-channel" );
1238                     if( i_spu < 0 || i_spu >= p_ogg->i_streams ||
1239                         p_ogg->pp_stream[i_spu]->p_es->i_cat != SPU_ES )
1240                     {
1241                         break;
1242                     }
1243                     else if( i_spu == i_stream )
1244                     {
1245                         p_ogg->p_stream_spu = p_stream;
1246                         Ogg_ElemStreamStart( p_input, p_ogg, i_stream );
1247                     }
1248                 }
1249                 break;
1250
1251             default:
1252                 break;
1253         }
1254 #undef p_stream
1255     }
1256
1257     /* we select the first audio and video ES */
1258     vlc_mutex_lock( &p_input->stream.stream_lock );
1259     if( !p_ogg->p_stream_video )
1260     {
1261         msg_Warn( p_input, "no video stream found" );
1262     }
1263     if( !p_ogg->p_stream_audio )
1264     {
1265         msg_Warn( p_input, "no audio stream found!" );
1266     }
1267     p_input->stream.p_selected_program->b_is_ok = 1;
1268     vlc_mutex_unlock( &p_input->stream.stream_lock );
1269
1270     return VLC_SUCCESS;
1271 }
1272
1273 /****************************************************************************
1274  * Ogg_EndOfStream: clean up the ES when an End of Stream is detected.
1275  ****************************************************************************/
1276 static void Ogg_EndOfStream( input_thread_t *p_input, demux_sys_t *p_ogg )
1277 {
1278     int i_stream, j;
1279
1280 #define p_stream p_ogg->pp_stream[i_stream]
1281         vlc_mutex_lock( &p_input->stream.stream_lock );
1282         if( p_input->stream.i_pgrm_number )
1283         while( p_input->stream.p_selected_program->i_es_number )
1284         {
1285             input_DelES( p_input,
1286                          p_input->stream.p_selected_program->pp_es[0] );
1287         }
1288         vlc_mutex_unlock( &p_input->stream.stream_lock );
1289 #undef p_stream
1290
1291     for( i_stream = 0 ; i_stream < p_ogg->i_streams; i_stream++ )
1292     {
1293 #define p_stream p_ogg->pp_stream[i_stream]
1294         vlc_mutex_lock( &p_input->stream.stream_lock );
1295         p_input->stream.i_mux_rate -= (p_stream->i_bitrate / ( 8 * 50 ));
1296         vlc_mutex_unlock( &p_input->stream.stream_lock );
1297 #undef p_stream
1298
1299         ogg_stream_clear( &p_ogg->pp_stream[i_stream]->os );
1300         for( j = 0; j < p_ogg->pp_stream[i_stream]->i_packets_backup; j++ )
1301         {
1302             free( p_ogg->pp_stream[i_stream]->p_packets_backup[j].packet );
1303         }
1304         if( p_ogg->pp_stream[i_stream]->p_packets_backup)
1305             free( p_ogg->pp_stream[i_stream]->p_packets_backup );
1306
1307 #if 0 /* hmmm, it's already freed in input_DelES() */
1308             if( p_ogg->pp_stream[i]->p_bih )
1309                 free( p_ogg->pp_stream[i]->p_bih );
1310             if( p_ogg->pp_stream[i]->p_wf )
1311                 free( p_ogg->pp_stream[i]->p_wf );
1312 #endif
1313
1314         free( p_ogg->pp_stream[i_stream] );
1315     }
1316
1317     /* Reinit p_ogg */
1318     if( p_ogg->pp_stream ) free( p_ogg->pp_stream );
1319     p_ogg->pp_stream = NULL;
1320     p_ogg->i_streams = 0;
1321     p_ogg->p_stream_video = NULL;
1322     p_ogg->p_stream_audio = NULL;
1323     p_ogg->p_stream_spu = NULL;
1324 }
1325
1326 /*****************************************************************************
1327  * Deactivate: frees unused data
1328  *****************************************************************************/
1329 static void Deactivate( vlc_object_t *p_this )
1330 {
1331     input_thread_t *p_input = (input_thread_t *)p_this;
1332     demux_sys_t *p_ogg = (demux_sys_t *)p_input->p_demux_data  ;
1333
1334     if( p_ogg )
1335     {
1336         /* Cleanup the bitstream parser */
1337         ogg_sync_clear( &p_ogg->oy );
1338
1339         Ogg_EndOfStream( p_input, p_ogg );
1340
1341         free( p_ogg );
1342     }
1343 }
1344
1345 /*****************************************************************************
1346  * Demux: reads and demuxes data packets
1347  *****************************************************************************
1348  * Returns -1 in case of error, 0 in case of EOF, 1 otherwise
1349  *****************************************************************************/
1350 static int Demux( input_thread_t * p_input )
1351 {
1352     demux_sys_t *p_ogg  = (demux_sys_t *)p_input->p_demux_data;
1353     ogg_page    oggpage;
1354     ogg_packet  oggpacket;
1355     int         i_stream;
1356
1357     if( p_ogg->b_eos )
1358     {
1359         if( Ogg_BeginningOfStream( p_input, p_ogg ) != VLC_SUCCESS ) return 0;
1360         p_ogg->b_eos = VLC_FALSE;
1361
1362         msg_Dbg( p_input, "beginning of a group of logical streams" );
1363
1364         p_input->stream.p_selected_program->i_synchro_state = SYNCHRO_REINIT;
1365         input_ClockManageRef( p_input, p_input->stream.p_selected_program,
1366                               0 );
1367     }
1368
1369 #define p_stream p_ogg->pp_stream[i_stream]
1370
1371     /* detect new selected/unselected streams */
1372     for( i_stream = 0; i_stream < p_ogg->i_streams; i_stream++ )
1373     {
1374         if( p_stream->p_es )
1375         {
1376             if( p_stream->p_es->p_decoder_fifo &&
1377                 !p_stream->i_activated )
1378             {
1379                 Ogg_ElemStreamStart( p_input, p_ogg, i_stream );
1380             }
1381             else
1382             if( !p_stream->p_es->p_decoder_fifo &&
1383                 p_stream->i_activated )
1384             {
1385                 Ogg_ElemStreamStop( p_input, p_ogg, i_stream );
1386             }
1387         }
1388     }
1389
1390     /* search for new video and audio stream to select
1391      * if current have been unselected */
1392     if( ( !p_ogg->p_stream_video )
1393             || ( !p_ogg->p_stream_video->p_es->p_decoder_fifo ) )
1394     {
1395         p_ogg->p_stream_video = NULL;
1396         for( i_stream = 0; i_stream < p_ogg->i_streams; i_stream++ )
1397         {
1398             if( ( p_stream->i_cat == VIDEO_ES )
1399                   &&( p_stream->p_es->p_decoder_fifo ) )
1400             {
1401                 p_ogg->p_stream_video = p_stream;
1402                 break;
1403             }
1404         }
1405     }
1406     if( ( !p_ogg->p_stream_audio )
1407             ||( !p_ogg->p_stream_audio->p_es->p_decoder_fifo ) )
1408     {
1409         p_ogg->p_stream_audio = NULL;
1410         for( i_stream = 0; i_stream < p_ogg->i_streams; i_stream++ )
1411         {
1412             if( ( p_stream->i_cat == AUDIO_ES )
1413                   &&( p_stream->p_es->p_decoder_fifo ) )
1414             {
1415                 p_ogg->p_stream_audio = p_stream;
1416                 break;
1417             }
1418         }
1419     }
1420
1421     if( p_input->stream.p_selected_program->i_synchro_state == SYNCHRO_REINIT )
1422     {
1423         msg_Warn( p_input, "synchro reinit" );
1424
1425         for( i_stream = 0; i_stream < p_ogg->i_streams; i_stream++ )
1426         {
1427             /* we'll trash all the data until we find the next pcr */
1428             p_stream->b_reinit = 1;
1429             p_stream->i_pcr = -1;
1430             p_stream->i_interpolated_pcr = -1;
1431         }
1432     }
1433
1434
1435     /*
1436      * Demux an ogg page from the stream
1437      */
1438     if( Ogg_ReadPage( p_input, p_ogg, &oggpage ) != VLC_SUCCESS )
1439     {
1440         return 0; /* EOF */
1441     }
1442
1443     /* Test for End of Stream */
1444     if( ogg_page_eos( &oggpage ) )
1445     {
1446         msg_Dbg( p_input, "end of a group of logical streams" );
1447
1448         Ogg_EndOfStream( p_input, p_ogg );
1449         p_ogg->b_eos = VLC_TRUE;
1450         return 1;
1451     }
1452
1453     for( i_stream = 0; i_stream < p_ogg->i_streams; i_stream++ )
1454     {
1455         if( ogg_stream_pagein( &p_stream->os, &oggpage ) != 0 )
1456             continue;
1457
1458         while( ogg_stream_packetout( &p_stream->os, &oggpacket ) > 0 )
1459         {
1460             if( !p_stream->p_es )
1461             {
1462                 break;
1463             }
1464
1465             if( p_stream->b_reinit )
1466             {
1467                 /* If synchro is re-initialized we need to drop all the packets
1468                  * until we find a new dated one. */
1469                 Ogg_UpdatePCR( p_stream, &oggpacket );
1470
1471                 if( p_stream->i_pcr >= 0 )
1472                 {
1473                     p_stream->b_reinit = 0;
1474                 }
1475                 else
1476                 {
1477                     p_stream->i_interpolated_pcr = -1;
1478                     continue;
1479                 }
1480
1481                 /* An Ogg/vorbis packet contains an end date granulepos */
1482                 if( p_stream->i_fourcc == VLC_FOURCC( 'v','o','r','b' ) )
1483                 {
1484                     if( ogg_stream_packetout( &p_stream->os, &oggpacket ) > 0 )
1485                     {
1486                         Ogg_DecodePacket( p_input, p_stream, &oggpacket );
1487                     }
1488                     continue;
1489                 }
1490             }
1491
1492             Ogg_DecodePacket( p_input, p_stream, &oggpacket );
1493         }
1494         break;
1495     }
1496
1497     i_stream = 0; p_ogg->i_pcr = -1;
1498     for( ; i_stream < p_ogg->i_streams; i_stream++ )
1499     {
1500         if( p_stream->i_cat == SPU_ES )
1501             continue;
1502         if( p_stream->i_interpolated_pcr < 0 )
1503             continue;
1504
1505         if( p_ogg->i_pcr < 0 || p_stream->i_interpolated_pcr < p_ogg->i_pcr )
1506             p_ogg->i_pcr = p_stream->i_interpolated_pcr;
1507     }
1508
1509     if( p_input->stream.p_selected_program->i_synchro_state != SYNCHRO_REINIT )
1510     {
1511         input_ClockManageRef( p_input, p_input->stream.p_selected_program,
1512                               p_ogg->i_pcr );
1513     }
1514
1515 #undef p_stream
1516
1517     return 1;
1518 }