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 1.39 2003/10/19 16:53:59 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 static int  Control   ( input_thread_t *, int, va_list );
 155
 156 /* Stream managment */
 157 static int  Ogg_ElemStreamStart  ( input_thread_t *, demux_sys_t *, int );
 158 static void Ogg_ElemStreamStop   ( input_thread_t *, demux_sys_t *, int );
 159
 160 /* Bitstream manipulation */
 161 static int  Ogg_Check        ( input_thread_t *p_input );
 162 static int  Ogg_ReadPage     ( input_thread_t *, demux_sys_t *, ogg_page * );
 163 static void Ogg_UpdatePCR    ( logical_stream_t *, ogg_packet * );
 164 static void Ogg_DecodePacket ( input_thread_t *p_input,
 165                                logical_stream_t *p_stream, ogg_packet * );
 166
 167 static int Ogg_BeginningOfStream( input_thread_t *p_input, demux_sys_t *p_ogg);
 168 static int Ogg_FindLogicalStreams( input_thread_t *p_input,demux_sys_t *p_ogg);
 169 static void Ogg_EndOfStream( input_thread_t *p_input, demux_sys_t *p_ogg );
 170
 171 /*****************************************************************************
 172  * Module descriptor
 173  *****************************************************************************/
 174 vlc_module_begin();
 175     set_description( _("ogg stream demuxer" ) );
 176     set_capability( "demux", 50 );
 177     set_callbacks( Activate, Deactivate );
 178     add_shortcut( "ogg" );
 179 vlc_module_end();
 180
 181 /*****************************************************************************
 182  * Stream managment
 183  *****************************************************************************/
 184 static int Ogg_ElemStreamStart( input_thread_t *p_input,
 185                                 demux_sys_t *p_ogg, int i_stream )
 186 {
 187 #define p_stream p_ogg->pp_stream[i_stream]
 188     if( !p_stream->p_es )
 189     {
 190         msg_Warn( p_input, "stream[%d] unselectable", i_stream );
 191         return( 0 );
 192     }
 193     if( p_stream->i_activated )
 194     {
 195         msg_Warn( p_input, "stream[%d] already selected", i_stream );
 196         return( 1 );
 197     }
 198
 199     if( !p_stream->p_es->p_decoder_fifo )
 200     {
 201         vlc_mutex_lock( &p_input->stream.stream_lock );
 202         input_SelectES( p_input, p_stream->p_es );
 203         vlc_mutex_unlock( &p_input->stream.stream_lock );
 204     }
 205     p_stream->i_activated = p_stream->p_es->p_decoder_fifo ? 1 : 0;
 206
 207     /* Feed the backup header to the decoder */
 208     if( !p_stream->b_force_backup )
 209     {
 210         int i;
 211         for( i = 0; i < p_stream->i_packets_backup; i++ )
 212         {
 213             /* Set correct starting date in header packets */
 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         p_packet_backup->granulepos = p_oggpacket->granulepos;
 378
 379         if( p_oggpacket->granulepos >= 0 )
 380         {
 381             /* Because of vorbis granulepos scheme we must set the pcr for the
 382              * 1st header packet so it doesn't get discarded in the
 383              * packetizer */
 384             Ogg_UpdatePCR( p_stream, p_oggpacket );
 385         }
 386
 387         p_packet_backup->packet = malloc( p_oggpacket->bytes );
 388         if( !p_packet_backup->packet ) return;
 389         memcpy( p_packet_backup->packet, p_oggpacket->packet,
 390                 p_oggpacket->bytes );
 391     }
 392
 393     vlc_mutex_lock( &p_input->stream.control.control_lock );
 394     if( p_stream->i_cat == AUDIO_ES && p_input->stream.control.b_mute )
 395     {
 396         b_trash = VLC_TRUE;
 397     }
 398     vlc_mutex_unlock( &p_input->stream.control.control_lock );
 399
 400     /* Convert the pcr into a pts */
 401     if( p_stream->i_fourcc == VLC_FOURCC( 'v','o','r','b' ) )
 402     {
 403         if( p_stream->i_pcr >= 0 )
 404         {
 405             /* This is for streams where the granulepos of the header packets
 406              * doesn't match these of the data packets (eg. ogg web radios). */
 407             if( p_stream->i_previous_pcr == 0 &&
 408                 p_stream->i_pcr  > 3 * DEFAULT_PTS_DELAY * 9/100 )
 409                 p_input->stream.p_selected_program->i_synchro_state =
 410                     SYNCHRO_REINIT;
 411
 412             p_stream->i_previous_pcr = p_stream->i_pcr;
 413
 414             /* Call the pace control */
 415             if( p_input->stream.p_selected_program->i_synchro_state ==
 416                 SYNCHRO_REINIT )
 417             input_ClockManageRef( p_input,
 418                                   p_input->stream.p_selected_program,
 419                                   p_stream->i_pcr );
 420         }
 421
 422         /* The granulepos is the end date of the sample */
 423         i_pts = ( p_stream->i_pcr < 0 ) ? 0 :
 424             input_ClockGetTS( p_input, p_input->stream.p_selected_program,
 425                               p_stream->i_pcr );
 426
 427         /* Convert the granulepos into the next pcr */
 428         Ogg_UpdatePCR( p_stream, p_oggpacket );
 429     }
 430     else
 431     {
 432         /* Convert the granulepos into the current pcr */
 433         Ogg_UpdatePCR( p_stream, p_oggpacket );
 434
 435         if( p_stream->i_pcr >= 0 )
 436         {
 437             /* This is for streams where the granulepos of the header packets
 438              * doesn't match these of the data packets (eg. ogg web radios). */
 439             if( p_stream->i_previous_pcr == 0 &&
 440                 p_stream->i_pcr  > 3 * DEFAULT_PTS_DELAY * 9/100 )
 441                 p_input->stream.p_selected_program->i_synchro_state =
 442                     SYNCHRO_REINIT;
 443
 444             p_stream->i_previous_pcr = p_stream->i_pcr;
 445
 446             /* Call the pace control */
 447             if( p_input->stream.p_selected_program->i_synchro_state ==
 448                 SYNCHRO_REINIT )
 449             input_ClockManageRef( p_input,
 450                                   p_input->stream.p_selected_program,
 451                                   p_stream->i_pcr );
 452         }
 453
 454         /* The granulepos is the start date of the sample */
 455         i_pts = ( p_stream->i_pcr < 0 ) ? 0 :
 456             input_ClockGetTS( p_input, p_input->stream.p_selected_program,
 457                               p_stream->i_pcr );
 458     }
 459
 460     if( !p_stream->p_es->p_decoder_fifo || b_trash )
 461     {
 462         /* This stream isn't currently selected so we don't need to decode it,
 463          * but we did need to store its pcr as it might be selected later on */
 464         return;
 465     }
 466
 467     if( !( p_pes = input_NewPES( p_input->p_method_data ) ) )
 468     {
 469         return;
 470     }
 471     if( !( p_data = input_NewPacket( p_input->p_method_data,
 472                                      p_oggpacket->bytes ) ) )
 473     {
 474         input_DeletePES( p_input->p_method_data, p_pes );
 475         return;
 476     }
 477     p_data->p_payload_end = p_data->p_payload_start + p_oggpacket->bytes;
 478
 479     p_pes->i_nb_data = 1;
 480     p_pes->i_dts = p_pes->i_pts = i_pts;
 481     p_pes->p_first = p_pes->p_last = p_data;
 482     p_pes->i_pes_size = p_oggpacket->bytes;
 483
 484     if( p_stream->i_cat == SPU_ES ) p_pes->i_dts = 0;
 485
 486     if( p_stream->i_fourcc != VLC_FOURCC( 'v','o','r','b' ) &&
 487         p_stream->i_fourcc != VLC_FOURCC( 't','a','r','k' ) &&
 488         p_stream->i_fourcc != VLC_FOURCC( 't','h','e','o' ) )
 489     {
 490         /* Remove the header from the packet */
 491         i_header_len = (*p_oggpacket->packet & PACKET_LEN_BITS01) >> 6;
 492         i_header_len |= (*p_oggpacket->packet & PACKET_LEN_BITS2) << 1;
 493         i_header_len++;
 494
 495         p_pes->i_pes_size -= i_header_len;
 496     }
 497
 498     if( p_stream->i_fourcc == VLC_FOURCC( 't','a','r','k' ) )
 499     {
 500         /* FIXME: the biggest hack I've ever done */
 501         msg_Warn( p_input, "tark pts: "I64Fd", granule: "I64Fd,
 502                   p_pes->i_pts, p_pes->i_dts );
 503         msleep(10000);
 504     }
 505
 506     memcpy( p_data->p_payload_start,
 507             p_oggpacket->packet + i_header_len,
 508             p_oggpacket->bytes - i_header_len );
 509
 510     p_data->p_payload_end = p_data->p_payload_start + p_pes->i_pes_size;
 511     p_data->b_discard_payload = 0;
 512
 513     input_DecodePES( p_stream->p_es->p_decoder_fifo, p_pes );
 514 }
 515
 516 /****************************************************************************
 517  * Ogg_FindLogicalStreams: Find the logical streams embedded in the physical
 518  *                         stream and fill p_ogg.
 519  *****************************************************************************
 520  * The initial page of a logical stream is marked as a 'bos' page.
 521  * Furthermore, the Ogg specification mandates that grouped bitstreams begin
 522  * together and all of the initial pages must appear before any data pages.
 523  *
 524  * On success this function returns VLC_SUCCESS.
 525  ****************************************************************************/
 526 static int Ogg_FindLogicalStreams( input_thread_t *p_input, demux_sys_t *p_ogg)
 527 {
 528     ogg_packet oggpacket;
 529     ogg_page oggpage;
 530     int i_stream;
 531
 532     while( Ogg_ReadPage( p_input, p_ogg, &oggpage ) == VLC_SUCCESS )
 533     {
 534         if( ogg_page_bos( &oggpage ) )
 535         {
 536
 537             /* All is wonderful in our fine fine little world.
 538              * We found the beginning of our first logical stream. */
 539             while( ogg_page_bos( &oggpage ) )
 540             {
 541                 p_ogg->i_streams++;
 542                 p_ogg->pp_stream =
 543                     realloc( p_ogg->pp_stream, p_ogg->i_streams *
 544                              sizeof(logical_stream_t *) );
 545
 546 #define p_stream p_ogg->pp_stream[p_ogg->i_streams - 1]
 547
 548                 p_stream = malloc( sizeof(logical_stream_t) );
 549                 memset( p_stream, 0, sizeof(logical_stream_t) );
 550
 551                 /* Setup the logical stream */
 552                 p_stream->i_serial_no = ogg_page_serialno( &oggpage );
 553                 ogg_stream_init( &p_stream->os, p_stream->i_serial_no );
 554
 555                 /* Extract the initial header from the first page and verify
 556                  * the codec type of tis Ogg bitstream */
 557                 if( ogg_stream_pagein( &p_stream->os, &oggpage ) < 0 )
 558                 {
 559                     /* error. stream version mismatch perhaps */
 560                     msg_Err( p_input, "Error reading first page of "
 561                              "Ogg bitstream data" );
 562                     return VLC_EGENERIC;
 563                 }
 564
 565                 /* FIXME: check return value */
 566                 ogg_stream_packetpeek( &p_stream->os, &oggpacket );
 567
 568                 /* Check for Vorbis header */
 569                 if( oggpacket.bytes >= 7 &&
 570                     ! strncmp( &oggpacket.packet[1], "vorbis", 6 ) )
 571                 {
 572                     oggpack_buffer opb;
 573
 574                     msg_Dbg( p_input, "found vorbis header" );
 575                     p_stream->i_cat = AUDIO_ES;
 576                     p_stream->i_fourcc = VLC_FOURCC( 'v','o','r','b' );
 577
 578                     /* Signal that we want to keep a backup of the vorbis
 579                      * stream headers. They will be used when switching between
 580                      * audio streams. */
 581                     p_stream->b_force_backup = 1;
 582
 583                     /* Cheat and get additionnal info ;) */
 584                     oggpack_readinit( &opb, oggpacket.packet, oggpacket.bytes);
 585                     oggpack_adv( &opb, 88 );
 586                     p_stream->i_channels = oggpack_read( &opb, 8 );
 587                     p_stream->f_rate = oggpack_read( &opb, 32 );
 588                     oggpack_adv( &opb, 32 );
 589                     p_stream->i_bitrate = oggpack_read( &opb, 32 );
 590                     {
 591                         char title[sizeof("Stream") + 10];
 592                         input_info_category_t *p_cat;
 593                         sprintf( title, "Stream %d", p_ogg->i_streams );
 594                         p_cat = input_InfoCategory( p_input, title );
 595                         input_AddInfo( p_cat, _("Type"), _("Audio") );
 596                         input_AddInfo( p_cat, _("Codec"), _("Vorbis") );
 597                         input_AddInfo( p_cat, _("Sample Rate"), "%f",
 598                                        p_stream->f_rate );
 599                         input_AddInfo( p_cat, _("Channels"), "%d",
 600                                        p_stream->i_channels );
 601                         input_AddInfo( p_cat, _("Bit Rate"), "%d",
 602                                        p_stream->i_bitrate );
 603                     }
 604                 }
 605                 /* Check for Theora header */
 606                 else if( oggpacket.bytes >= 7 &&
 607                          ! strncmp( &oggpacket.packet[1], "theora", 6 ) )
 608                 {
 609 #ifdef HAVE_OGGPACKB
 610                     oggpack_buffer opb;
 611                     int i_fps_numerator;
 612                     int i_fps_denominator;
 613                     int i_keyframe_frequency_force;
 614 #endif
 615
 616                     msg_Dbg( p_input, "found theora header" );
 617 #ifdef HAVE_OGGPACKB
 618                     p_stream->i_cat = VIDEO_ES;
 619                     p_stream->i_fourcc = VLC_FOURCC( 't','h','e','o' );
 620
 621                     /* Signal that we want to keep a backup of the vorbis
 622                      * stream headers. They will be used when switching between
 623                      * audio streams. */
 624                     p_stream->b_force_backup = 1;
 625
 626                     /* Cheat and get additionnal info ;) */
 627                     oggpackB_readinit(&opb, oggpacket.packet, oggpacket.bytes);
 628                     oggpackB_adv( &opb, 56 );
 629                     oggpackB_read( &opb, 8 ); /* major version num */
 630                     oggpackB_read( &opb, 8 ); /* minor version num */
 631                     oggpackB_read( &opb, 8 ); /* subminor version num */
 632                     oggpackB_read( &opb, 16 ) /*<< 4*/; /* width */
 633                     oggpackB_read( &opb, 16 ) /*<< 4*/; /* height */
 634                     oggpackB_read( &opb, 24 ); /* frame width */
 635                     oggpackB_read( &opb, 24 ); /* frame height */
 636                     oggpackB_read( &opb, 8 ); /* x offset */
 637                     oggpackB_read( &opb, 8 ); /* y offset */
 638
 639                     i_fps_numerator = oggpackB_read( &opb, 32 );
 640                     i_fps_denominator = oggpackB_read( &opb, 32 );
 641                     oggpackB_read( &opb, 24 ); /* aspect_numerator */
 642                     oggpackB_read( &opb, 24 ); /* aspect_denominator */
 643                     i_keyframe_frequency_force = 1 << oggpackB_read( &opb, 5 );
 644                     oggpackB_read( &opb, 8 ); /* colorspace */
 645                     p_stream->i_bitrate = oggpackB_read( &opb, 24 );
 646                     oggpackB_read( &opb, 6 ); /* quality */
 647
 648                     /* granule_shift = i_log( frequency_force -1 ) */
 649                     p_stream->i_theora_keyframe_granule_shift = 0;
 650                     i_keyframe_frequency_force--;
 651                     while( i_keyframe_frequency_force )
 652                     {
 653                         p_stream->i_theora_keyframe_granule_shift++;
 654                         i_keyframe_frequency_force >>= 1;
 655                     }
 656
 657                     p_stream->f_rate = ((float)i_fps_numerator) /
 658                                                 i_fps_denominator;
 659                     msg_Dbg( p_input,
 660                              "found theora header, bitrate: %i, rate: %f",
 661                              p_stream->i_bitrate, p_stream->f_rate );
 662                     {
 663                         char title[sizeof("Stream") + 10];
 664                         input_info_category_t *p_cat;
 665                         sprintf( title, "Stream %d", p_ogg->i_streams );
 666                         p_cat = input_InfoCategory( p_input, title );
 667                         input_AddInfo( p_cat, _("Type"), _("Video") );
 668                         input_AddInfo( p_cat, _("Codec"), _("Theora") );
 669                         input_AddInfo( p_cat, _("Frame Rate"), "%f",
 670                                        p_stream->f_rate );
 671                         input_AddInfo( p_cat, _("Bit Rate"), "%d",
 672                                        p_stream->i_bitrate );
 673                     }
 674 #else /* HAVE_OGGPACKB */
 675                     msg_Dbg( p_input, "the ogg demuxer has been compiled "
 676                              "without support for the oggpackB extension."
 677                              "The theora stream won't be decoded." );
 678                     free( p_stream );
 679                     p_ogg->i_streams--;
 680 #endif /* HAVE_OGGPACKB */
 681                 }
 682                 /* Check for Tarkin header */
 683                 else if( oggpacket.bytes >= 7 &&
 684                          ! strncmp( &oggpacket.packet[1], "tarkin", 6 ) )
 685                 {
 686                     oggpack_buffer opb;
 687
 688                     msg_Dbg( p_input, "found tarkin header" );
 689                     p_stream->i_cat = VIDEO_ES;
 690                     p_stream->i_fourcc = VLC_FOURCC( 't','a','r','k' );
 691
 692                     /* Cheat and get additionnal info ;) */
 693                     oggpack_readinit( &opb, oggpacket.packet, oggpacket.bytes);
 694                     oggpack_adv( &opb, 88 );
 695                     oggpack_adv( &opb, 104 );
 696                     p_stream->i_bitrate = oggpack_read( &opb, 32 );
 697                     p_stream->f_rate = 2; /* FIXME */
 698                     msg_Dbg( p_input,
 699                              "found tarkin header, bitrate: %i, rate: %f",
 700                              p_stream->i_bitrate, p_stream->f_rate );
 701                                         {
 702                         char title[sizeof("Stream") + 10];
 703                         input_info_category_t *p_cat;
 704                         sprintf( title, "Stream %d", p_ogg->i_streams );
 705                         p_cat = input_InfoCategory( p_input, title );
 706                         input_AddInfo( p_cat, _("Type"), _("Video") );
 707                         input_AddInfo( p_cat, _("Codec"), _("tarkin") );
 708                         input_AddInfo( p_cat, _("Sample Rate"), "%f",
 709                                        p_stream->f_rate );
 710                         input_AddInfo( p_cat, _("Bit Rate"), "%d",
 711                                        p_stream->i_bitrate );
 712                     }
 713
 714                 }
 715                 else if( oggpacket.bytes >= 142 &&
 716                          !strncmp( &oggpacket.packet[1],
 717                                    "Direct Show Samples embedded in Ogg", 35 ))
 718                 {
 719                     /* Old header type */
 720
 721                     /* Check for video header (old format) */
 722                     if( GetDWLE((oggpacket.packet+96)) == 0x05589f80 &&
 723                         oggpacket.bytes >= 184 )
 724                     {
 725                         p_stream->i_cat = VIDEO_ES;
 726
 727                         p_stream->p_bih = (BITMAPINFOHEADER *)
 728                             malloc( sizeof(BITMAPINFOHEADER) );
 729                         if( !p_stream->p_bih )
 730                         {
 731                             /* Mem allocation error, just ignore the stream */
 732                             free( p_stream );
 733                             p_ogg->i_streams--;
 734                             break;
 735                         }
 736                         p_stream->p_bih->biSize = sizeof(BITMAPINFOHEADER);
 737                         p_stream->p_bih->biCompression= p_stream->i_fourcc =
 738                             VLC_FOURCC( oggpacket.packet[68],
 739                                         oggpacket.packet[69],
 740                                         oggpacket.packet[70],
 741                                         oggpacket.packet[71] );
 742                         msg_Dbg( p_input, "found video header of type: %.4s",
 743                                  (char *)&p_stream->i_fourcc );
 744
 745                         p_stream->f_rate = 10000000.0 /
 746                             GetQWLE((oggpacket.packet+164));
 747                         p_stream->p_bih->biBitCount =
 748                             GetWLE((oggpacket.packet+182));
 749                         if( !p_stream->p_bih->biBitCount )
 750                             p_stream->p_bih->biBitCount=24; // hack, FIXME
 751                         p_stream->p_bih->biWidth =
 752                             GetDWLE((oggpacket.packet+176));
 753                         p_stream->p_bih->biHeight =
 754                             GetDWLE((oggpacket.packet+180));
 755                         p_stream->p_bih->biPlanes= 1 ;
 756                         p_stream->p_bih->biSizeImage =
 757                             (p_stream->p_bih->biBitCount >> 3) *
 758                             p_stream->p_bih->biWidth *
 759                             p_stream->p_bih->biHeight;
 760
 761                         msg_Dbg( p_input,
 762                              "fps: %f, width:%i; height:%i, bitcount:%i",
 763                             p_stream->f_rate, p_stream->p_bih->biWidth,
 764                             p_stream->p_bih->biHeight,
 765                             p_stream->p_bih->biBitCount);
 766                         {
 767                             char title[sizeof("Stream") + 10];
 768                             input_info_category_t *p_cat;
 769                             sprintf( title, "Stream %d", p_ogg->i_streams );
 770                             p_cat = input_InfoCategory( p_input, title );
 771                             input_AddInfo( p_cat, _("Type"), _("Video") );
 772                             input_AddInfo( p_cat, _("Codec"), "%.4s",
 773                                            (char *)&p_stream->i_fourcc );
 774                             input_AddInfo( p_cat, _("Frame Rate"), "%f",
 775                                            p_stream->f_rate );
 776                             input_AddInfo( p_cat, _("Bit Count"), "%d",
 777                                            p_stream->p_bih->biBitCount );
 778                             input_AddInfo( p_cat, _("Width"), "%d",
 779                                            p_stream->p_bih->biWidth );
 780                             input_AddInfo( p_cat, _("Height"), "%d",
 781                                            p_stream->p_bih->biHeight );
 782                         }
 783                         p_stream->i_bitrate = 0;
 784                     }
 785                     /* Check for audio header (old format) */
 786                     else if( GetDWLE((oggpacket.packet+96)) == 0x05589F81 )
 787                     {
 788                         unsigned int i_extra_size;
 789
 790                         p_stream->i_cat = AUDIO_ES;
 791
 792                         i_extra_size = GetWLE((oggpacket.packet+140));
 793
 794                         p_stream->p_wf = (WAVEFORMATEX *)
 795                             malloc( sizeof(WAVEFORMATEX) + i_extra_size );
 796                         if( !p_stream->p_wf )
 797                         {
 798                             /* Mem allocation error, just ignore the stream */
 799                             free( p_stream );
 800                             p_ogg->i_streams--;
 801                             break;
 802                         }
 803
 804                         p_stream->p_wf->wFormatTag =
 805                             GetWLE((oggpacket.packet+124));
 806                         p_stream->p_wf->nChannels =
 807                             GetWLE((oggpacket.packet+126));
 808                         p_stream->f_rate = p_stream->p_wf->nSamplesPerSec =
 809                             GetDWLE((oggpacket.packet+128));
 810                         p_stream->i_bitrate = p_stream->p_wf->nAvgBytesPerSec =
 811                             GetDWLE((oggpacket.packet+132));
 812                         p_stream->i_bitrate *= 8;
 813                         p_stream->p_wf->nBlockAlign =
 814                             GetWLE((oggpacket.packet+136));
 815                         p_stream->p_wf->wBitsPerSample =
 816                             GetWLE((oggpacket.packet+138));
 817                         p_stream->p_wf->cbSize = i_extra_size;
 818
 819                         if( i_extra_size > 0 )
 820                             memcpy( p_stream->p_wf+sizeof(WAVEFORMATEX),
 821                                     oggpacket.packet+142, i_extra_size );
 822
 823                         switch( p_stream->p_wf->wFormatTag )
 824                         {
 825                         case WAVE_FORMAT_PCM:
 826                             p_stream->i_fourcc =
 827                                 VLC_FOURCC( 'a', 'r', 'a', 'w' );
 828                             break;
 829                         case WAVE_FORMAT_MPEG:
 830                         case WAVE_FORMAT_MPEGLAYER3:
 831                             p_stream->i_fourcc =
 832                                 VLC_FOURCC( 'm', 'p', 'g', 'a' );
 833                             break;
 834                         case WAVE_FORMAT_A52:
 835                             p_stream->i_fourcc =
 836                                 VLC_FOURCC( 'a', '5', '2', ' ' );
 837                             break;
 838                         case WAVE_FORMAT_WMA1:
 839                             p_stream->i_fourcc =
 840                                 VLC_FOURCC( 'w', 'm', 'a', '1' );
 841                             break;
 842                         case WAVE_FORMAT_WMA2:
 843                             p_stream->i_fourcc =
 844                                 VLC_FOURCC( 'w', 'm', 'a', '2' );
 845                             break;
 846                         default:
 847                             p_stream->i_fourcc = VLC_FOURCC( 'm', 's',
 848                                 ( p_stream->p_wf->wFormatTag >> 8 ) & 0xff,
 849                                 p_stream->p_wf->wFormatTag & 0xff );
 850                         }
 851
 852                         msg_Dbg( p_input, "found audio header of type: %.4s",
 853                                  (char *)&p_stream->i_fourcc );
 854                         msg_Dbg( p_input, "audio:0x%4.4x channels:%d %dHz "
 855                                  "%dbits/sample %dkb/s",
 856                                  p_stream->p_wf->wFormatTag,
 857                                  p_stream->p_wf->nChannels,
 858                                  p_stream->p_wf->nSamplesPerSec,
 859                                  p_stream->p_wf->wBitsPerSample,
 860                                  p_stream->p_wf->nAvgBytesPerSec * 8 / 1024 );
 861                         {
 862                             char title[sizeof("Stream") + 10];
 863                             input_info_category_t *p_cat;
 864                             sprintf( title, "Stream %d", p_ogg->i_streams );
 865                             p_cat = input_InfoCategory( p_input, title );
 866                             input_AddInfo( p_cat, _("Type"), _("Audio") );
 867                             input_AddInfo( p_cat, _("Codec"), "%.4s",
 868                                            (char *)&p_stream->i_fourcc );
 869                             input_AddInfo( p_cat, _("Sample Rate"), "%d",
 870                                            p_stream->p_wf->nSamplesPerSec );
 871                             input_AddInfo( p_cat, _("Bit Rate"), "%d",
 872                                            p_stream->p_wf->nAvgBytesPerSec * 8
 873                                               / 1024 );
 874                             input_AddInfo( p_cat, _("Channels"), "%d",
 875                                            p_stream->p_wf->nChannels );
 876                             input_AddInfo( p_cat, _("Bits per Sample"), "%d",
 877                                            p_stream->p_wf->wBitsPerSample );
 878                         }
 879
 880                     }
 881                     else
 882                     {
 883                         msg_Dbg( p_input, "stream %d has an old header "
 884                             "but is of an unknown type", p_ogg->i_streams-1 );
 885                         free( p_stream );
 886                         p_ogg->i_streams--;
 887                     }
 888                 }
 889                 else if( (*oggpacket.packet & PACKET_TYPE_BITS )
 890                          == PACKET_TYPE_HEADER &&
 891                          oggpacket.bytes >= (int)sizeof(stream_header)+1 )
 892                 {
 893                     stream_header *st = (stream_header *)(oggpacket.packet+1);
 894
 895                     /* Check for video header (new format) */
 896                     if( !strncmp( st->streamtype, "video", 5 ) )
 897                     {
 898                         p_stream->i_cat = VIDEO_ES;
 899
 900                         /* We need to get rid of the header packet */
 901                         ogg_stream_packetout( &p_stream->os, &oggpacket );
 902
 903                         p_stream->p_bih = (BITMAPINFOHEADER *)
 904                             malloc( sizeof(BITMAPINFOHEADER) );
 905                         if( !p_stream->p_bih )
 906                         {
 907                             /* Mem allocation error, just ignore the stream */
 908                             free( p_stream );
 909                             p_ogg->i_streams--;
 910                             break;
 911                         }
 912                         p_stream->p_bih->biSize = sizeof(BITMAPINFOHEADER);
 913                         p_stream->p_bih->biCompression=
 914                             p_stream->i_fourcc = VLC_FOURCC( st->subtype[0],
 915                                                              st->subtype[1],
 916                                                              st->subtype[2],
 917                                                              st->subtype[3] );
 918                         msg_Dbg( p_input, "found video header of type: %.4s",
 919                                  (char *)&p_stream->i_fourcc );
 920
 921                         p_stream->f_rate = 10000000.0 /
 922                             GetQWLE(&st->time_unit);
 923                         p_stream->p_bih->biBitCount =
 924                             GetWLE(&st->bits_per_sample);
 925                         p_stream->p_bih->biWidth =
 926                             GetDWLE(&st->sh.video.width);
 927                         p_stream->p_bih->biHeight =
 928                             GetDWLE(&st->sh.video.height);
 929                         p_stream->p_bih->biPlanes= 1 ;
 930                         p_stream->p_bih->biSizeImage =
 931                             (p_stream->p_bih->biBitCount >> 3) *
 932                             p_stream->p_bih->biWidth *
 933                             p_stream->p_bih->biHeight;
 934
 935                         msg_Dbg( p_input,
 936                              "fps: %f, width:%i; height:%i, bitcount:%i",
 937                             p_stream->f_rate, p_stream->p_bih->biWidth,
 938                             p_stream->p_bih->biHeight,
 939                             p_stream->p_bih->biBitCount);
 940
 941                         {
 942                             char title[sizeof("Stream") + 10];
 943                             input_info_category_t *p_cat;
 944                             sprintf( title, "Stream %d", p_ogg->i_streams );
 945                             p_cat = input_InfoCategory( p_input, title );
 946                             input_AddInfo( p_cat, _("Type"), _("Video") );
 947                             input_AddInfo( p_cat, _("Codec"), "%.4s",
 948                                            (char *)&p_stream->i_fourcc );
 949                             input_AddInfo( p_cat, _("Frame Rate"), "%f",
 950                                            p_stream->f_rate );
 951                             input_AddInfo( p_cat, _("Bit Count"), "%d",
 952                                            p_stream->p_bih->biBitCount );
 953                             input_AddInfo( p_cat, _("Width"), "%d",
 954                                            p_stream->p_bih->biWidth );
 955                             input_AddInfo( p_cat, _("Height"), "%d",
 956                                            p_stream->p_bih->biHeight );
 957                         }
 958                         p_stream->i_bitrate = 0;
 959                     }
 960                     /* Check for audio header (new format) */
 961                     else if( !strncmp( st->streamtype, "audio", 5 ) )
 962                     {
 963                         char p_buffer[5];
 964
 965                         p_stream->i_cat = AUDIO_ES;
 966
 967                         /* We need to get rid of the header packet */
 968                         ogg_stream_packetout( &p_stream->os, &oggpacket );
 969
 970                         p_stream->p_wf = (WAVEFORMATEX *)
 971                             malloc( sizeof(WAVEFORMATEX) );
 972                         if( !p_stream->p_wf )
 973                         {
 974                             /* Mem allocation error, just ignore the stream */
 975                             free( p_stream );
 976                             p_ogg->i_streams--;
 977                             break;
 978                         }
 979
 980                         memcpy( p_buffer, st->subtype, 4 );
 981                         p_buffer[4] = '\0';
 982                         p_stream->p_wf->wFormatTag = strtol(p_buffer,NULL,16);
 983                         p_stream->p_wf->nChannels =
 984                             GetWLE(&st->sh.audio.channels);
 985                         p_stream->f_rate = p_stream->p_wf->nSamplesPerSec =
 986                             GetQWLE(&st->samples_per_unit);
 987                         p_stream->i_bitrate = p_stream->p_wf->nAvgBytesPerSec =
 988                             GetDWLE(&st->sh.audio.avgbytespersec);
 989                         p_stream->i_bitrate *= 8;
 990                         p_stream->p_wf->nBlockAlign =
 991                             GetWLE(&st->sh.audio.blockalign);
 992                         p_stream->p_wf->wBitsPerSample =
 993                             GetWLE(&st->bits_per_sample);
 994                         p_stream->p_wf->cbSize = 0;
 995
 996                         switch( p_stream->p_wf->wFormatTag )
 997                         {
 998                         case WAVE_FORMAT_PCM:
 999                             p_stream->i_fourcc =
1000                                 VLC_FOURCC( 'a', 'r', 'a', 'w' );
1001                             break;
1002                         case WAVE_FORMAT_MPEG:
1003                         case WAVE_FORMAT_MPEGLAYER3:
1004                             p_stream->i_fourcc =
1005                                 VLC_FOURCC( 'm', 'p', 'g', 'a' );
1006                             break;
1007                         case WAVE_FORMAT_A52:
1008                             p_stream->i_fourcc =
1009                                 VLC_FOURCC( 'a', '5', '2', ' ' );
1010                             break;
1011                         case WAVE_FORMAT_WMA1:
1012                             p_stream->i_fourcc =
1013                                 VLC_FOURCC( 'w', 'm', 'a', '1' );
1014                             break;
1015                         case WAVE_FORMAT_WMA2:
1016                             p_stream->i_fourcc =
1017                                 VLC_FOURCC( 'w', 'm', 'a', '2' );
1018                             break;
1019                         default:
1020                             p_stream->i_fourcc = VLC_FOURCC( 'm', 's',
1021                                 ( p_stream->p_wf->wFormatTag >> 8 ) & 0xff,
1022                                 p_stream->p_wf->wFormatTag & 0xff );
1023                         }
1024
1025                         msg_Dbg( p_input, "found audio header of type: %.4s",
1026                                  (char *)&p_stream->i_fourcc );
1027                         msg_Dbg( p_input, "audio:0x%4.4x channels:%d %dHz "
1028                                  "%dbits/sample %dkb/s",
1029                                  p_stream->p_wf->wFormatTag,
1030                                  p_stream->p_wf->nChannels,
1031                                  p_stream->p_wf->nSamplesPerSec,
1032                                  p_stream->p_wf->wBitsPerSample,
1033                                  p_stream->p_wf->nAvgBytesPerSec * 8 / 1024 );
1034                         {
1035                             char title[sizeof("Stream") + 10];
1036                             input_info_category_t *p_cat;
1037                             sprintf( title, "Stream %d", p_ogg->i_streams );
1038                             p_cat = input_InfoCategory( p_input, title );
1039                             input_AddInfo( p_cat, _("Type"), _("Audio") );
1040                             input_AddInfo( p_cat, _("Codec"), "%.4s",
1041                                            (char *)&p_stream->i_fourcc );
1042                             input_AddInfo( p_cat, _("Sample Rate"), "%d",
1043                                            p_stream->p_wf->nSamplesPerSec );
1044                             input_AddInfo( p_cat, _("Bit Rate"), "%d",
1045                                            p_stream->p_wf->nAvgBytesPerSec * 8
1046                                               / 1024 );
1047                             input_AddInfo( p_cat, _("Channels"), "%d",
1048                                            p_stream->p_wf->nChannels );
1049                             input_AddInfo( p_cat, _("Bits per Sample"), "%d",
1050                                            p_stream->p_wf->wBitsPerSample );
1051                         }
1052                     }
1053                     /* Check for text (subtitles) header */
1054                     else if( !strncmp(st->streamtype, "text", 4) )
1055                     {
1056                         /* We need to get rid of the header packet */
1057                         ogg_stream_packetout( &p_stream->os, &oggpacket );
1058
1059                         msg_Dbg( p_input, "found text subtitles header" );
1060                         p_stream->i_cat = SPU_ES;
1061                         p_stream->i_fourcc =
1062                             VLC_FOURCC( 's', 'u', 'b', 't' );
1063                         p_stream->f_rate = 1000; /* granulepos is in milisec */
1064                     }
1065                     else
1066                     {
1067                         msg_Dbg( p_input, "stream %d has a header marker "
1068                             "but is of an unknown type", p_ogg->i_streams-1 );
1069                         free( p_stream );
1070                         p_ogg->i_streams--;
1071                     }
1072                 }
1073                 else
1074                 {
1075                     msg_Dbg( p_input, "stream %d is of unknown type",
1076                              p_ogg->i_streams-1 );
1077                     free( p_stream );
1078                     p_ogg->i_streams--;
1079                 }
1080
1081 #undef p_stream
1082
1083                 if( Ogg_ReadPage( p_input, p_ogg, &oggpage ) != VLC_SUCCESS )
1084                     return VLC_EGENERIC;
1085             }
1086
1087             /* This is the first data page, which means we are now finished
1088              * with the initial pages. We just need to store it in the relevant
1089              * bitstream. */
1090             for( i_stream = 0; i_stream < p_ogg->i_streams; i_stream++ )
1091             {
1092                 if( ogg_stream_pagein( &p_ogg->pp_stream[i_stream]->os,
1093                                        &oggpage ) == 0 )
1094                 {
1095                     break;
1096                 }
1097             }
1098             return VLC_SUCCESS;
1099         }
1100     }
1101     return VLC_EGENERIC;
1102 }
1103
1104 /*****************************************************************************
1105  * Activate: initializes ogg demux structures
1106  *****************************************************************************/
1107 static int Activate( vlc_object_t * p_this )
1108 {
1109     input_thread_t *p_input = (input_thread_t *)p_this;
1110     demux_sys_t    *p_ogg;
1111     int            b_forced;
1112
1113     p_input->p_demux_data = NULL;
1114     b_forced = ( ( *p_input->psz_demux )&&
1115                  ( !strncmp( p_input->psz_demux, "ogg", 10 ) ) ) ? 1 : 0;
1116
1117     /* Check if we are dealing with an ogg stream */
1118     if( !b_forced && ( Ogg_Check( p_input ) != VLC_SUCCESS ) )
1119         return -1;
1120
1121     /* Allocate p_ogg */
1122     if( !( p_ogg = malloc( sizeof( demux_sys_t ) ) ) )
1123     {
1124         msg_Err( p_input, "out of memory" );
1125         goto error;
1126     }
1127     memset( p_ogg, 0, sizeof( demux_sys_t ) );
1128     p_input->p_demux_data = p_ogg;
1129     p_ogg->pp_stream = NULL;
1130     p_ogg->p_stream_video = NULL;
1131     p_ogg->p_stream_audio = NULL;
1132     p_ogg->p_stream_spu = NULL;
1133
1134     /* Initialize the Ogg physical bitstream parser */
1135     ogg_sync_init( &p_ogg->oy );
1136
1137     /*Set exported functions */
1138     p_input->pf_demux = Demux;
1139     p_input->pf_demux_control = Control;
1140
1141     /* Initialize access plug-in structures. */
1142     if( p_input->i_mtu == 0 )
1143     {
1144         /* Improve speed. */
1145         p_input->i_bufsize = INPUT_DEFAULT_BUFSIZE;
1146     }
1147
1148     /* Create one program */
1149     vlc_mutex_lock( &p_input->stream.stream_lock );
1150     if( input_InitStream( p_input, 0 ) == -1)
1151     {
1152         vlc_mutex_unlock( &p_input->stream.stream_lock );
1153         msg_Err( p_input, "cannot init stream" );
1154         goto error;
1155     }
1156     if( input_AddProgram( p_input, 0, 0) == NULL )
1157     {
1158         vlc_mutex_unlock( &p_input->stream.stream_lock );
1159         msg_Err( p_input, "cannot add program" );
1160         goto error;
1161     }
1162     p_input->stream.p_selected_program = p_input->stream.pp_programs[0];
1163     vlc_mutex_unlock( &p_input->stream.stream_lock );
1164
1165     /* Begnning of stream, tell the demux to look for elementary streams. */
1166     p_ogg->b_eos = VLC_TRUE;
1167
1168     return 0;
1169
1170  error:
1171     Deactivate( (vlc_object_t *)p_input );
1172     return -1;
1173
1174 }
1175
1176 /****************************************************************************
1177  * Ogg_BeginningOfStream: Look for Beginning of Stream ogg pages and add
1178  *                        Elementary streams.
1179  ****************************************************************************/
1180 static int Ogg_BeginningOfStream( input_thread_t *p_input, demux_sys_t *p_ogg)
1181 {
1182     int i_stream;
1183
1184     /* Find the logical streams embedded in the physical stream and
1185      * initialize our p_ogg structure. */
1186     if( Ogg_FindLogicalStreams( p_input, p_ogg ) != VLC_SUCCESS )
1187     {
1188         msg_Warn( p_input, "couldn't find any ogg logical stream" );
1189         return VLC_EGENERIC;
1190     }
1191
1192     vlc_mutex_lock( &p_input->stream.stream_lock );
1193     p_input->stream.i_mux_rate = 0;
1194     vlc_mutex_unlock( &p_input->stream.stream_lock );
1195
1196     for( i_stream = 0 ; i_stream < p_ogg->i_streams; i_stream++ )
1197     {
1198 #define p_stream p_ogg->pp_stream[i_stream]
1199         vlc_mutex_lock( &p_input->stream.stream_lock );
1200         p_stream->p_es = input_AddES( p_input,
1201                                       p_input->stream.p_selected_program,
1202                                       i_stream,
1203                                       p_stream->i_cat, NULL, 0 );
1204         p_input->stream.i_mux_rate += (p_stream->i_bitrate / ( 8 * 50 ));
1205         vlc_mutex_unlock( &p_input->stream.stream_lock );
1206         p_stream->p_es->i_stream_id = i_stream;
1207         p_stream->p_es->i_fourcc = p_stream->i_fourcc;
1208         p_stream->p_es->p_waveformatex      = (void*)p_stream->p_wf;
1209         p_stream->p_es->p_bitmapinfoheader  = (void*)p_stream->p_bih;
1210
1211         p_stream->i_pcr  = p_stream->i_previous_pcr = -1;
1212         p_stream->b_reinit = 0;
1213 #undef p_stream
1214     }
1215
1216     for( i_stream = 0; i_stream < p_ogg->i_streams; i_stream++ )
1217     {
1218 #define p_stream  p_ogg->pp_stream[i_stream]
1219         switch( p_stream->p_es->i_cat )
1220         {
1221             case( VIDEO_ES ):
1222                 if( (p_ogg->p_stream_video == NULL) )
1223                 {
1224                     p_ogg->p_stream_video = p_stream;
1225                     /* TODO add test to see if a decoder has been found */
1226                     Ogg_ElemStreamStart( p_input, p_ogg, i_stream );
1227                 }
1228                 break;
1229
1230             case( AUDIO_ES ):
1231                 if( (p_ogg->p_stream_audio == NULL) )
1232                 {
1233                     int i_audio = config_GetInt( p_input, "audio-channel" );
1234                     if( i_audio == i_stream || i_audio <= 0 ||
1235                         i_audio >= p_ogg->i_streams ||
1236                         p_ogg->pp_stream[i_audio]->p_es->i_cat != AUDIO_ES )
1237                     {
1238                         p_ogg->p_stream_audio = p_stream;
1239                         Ogg_ElemStreamStart( p_input, p_ogg, i_stream );
1240                     }
1241                 }
1242                 break;
1243
1244             case( SPU_ES ):
1245                 if( (p_ogg->p_stream_spu == NULL) )
1246                 {
1247                     /* for spu, default is none */
1248                     int i_spu = config_GetInt( p_input, "spu-channel" );
1249                     if( i_spu < 0 || i_spu >= p_ogg->i_streams ||
1250                         p_ogg->pp_stream[i_spu]->p_es->i_cat != SPU_ES )
1251                     {
1252                         break;
1253                     }
1254                     else if( i_spu == i_stream )
1255                     {
1256                         p_ogg->p_stream_spu = p_stream;
1257                         Ogg_ElemStreamStart( p_input, p_ogg, i_stream );
1258                     }
1259                 }
1260                 break;
1261
1262             default:
1263                 break;
1264         }
1265 #undef p_stream
1266     }
1267
1268     /* we select the first audio and video ES */
1269     vlc_mutex_lock( &p_input->stream.stream_lock );
1270     if( !p_ogg->p_stream_video )
1271     {
1272         msg_Warn( p_input, "no video stream found" );
1273     }
1274     if( !p_ogg->p_stream_audio )
1275     {
1276         msg_Warn( p_input, "no audio stream found!" );
1277     }
1278     p_input->stream.p_selected_program->b_is_ok = 1;
1279     vlc_mutex_unlock( &p_input->stream.stream_lock );
1280
1281     return VLC_SUCCESS;
1282 }
1283
1284 /****************************************************************************
1285  * Ogg_EndOfStream: clean up the ES when an End of Stream is detected.
1286  ****************************************************************************/
1287 static void Ogg_EndOfStream( input_thread_t *p_input, demux_sys_t *p_ogg )
1288 {
1289     int i_stream, j;
1290
1291 #define p_stream p_ogg->pp_stream[i_stream]
1292         vlc_mutex_lock( &p_input->stream.stream_lock );
1293         if( p_input->stream.i_pgrm_number )
1294         while( p_input->stream.p_selected_program->i_es_number )
1295         {
1296             input_DelES( p_input,
1297                          p_input->stream.p_selected_program->pp_es[0] );
1298         }
1299         vlc_mutex_unlock( &p_input->stream.stream_lock );
1300 #undef p_stream
1301
1302     for( i_stream = 0 ; i_stream < p_ogg->i_streams; i_stream++ )
1303     {
1304 #define p_stream p_ogg->pp_stream[i_stream]
1305         vlc_mutex_lock( &p_input->stream.stream_lock );
1306         p_input->stream.i_mux_rate -= (p_stream->i_bitrate / ( 8 * 50 ));
1307         vlc_mutex_unlock( &p_input->stream.stream_lock );
1308 #undef p_stream
1309
1310         ogg_stream_clear( &p_ogg->pp_stream[i_stream]->os );
1311         for( j = 0; j < p_ogg->pp_stream[i_stream]->i_packets_backup; j++ )
1312         {
1313             free( p_ogg->pp_stream[i_stream]->p_packets_backup[j].packet );
1314         }
1315         if( p_ogg->pp_stream[i_stream]->p_packets_backup)
1316             free( p_ogg->pp_stream[i_stream]->p_packets_backup );
1317
1318 #if 0 /* hmmm, it's already freed in input_DelES() */
1319             if( p_ogg->pp_stream[i]->p_bih )
1320                 free( p_ogg->pp_stream[i]->p_bih );
1321             if( p_ogg->pp_stream[i]->p_wf )
1322                 free( p_ogg->pp_stream[i]->p_wf );
1323 #endif
1324
1325         free( p_ogg->pp_stream[i_stream] );
1326     }
1327
1328     /* Reinit p_ogg */
1329     if( p_ogg->pp_stream ) free( p_ogg->pp_stream );
1330     p_ogg->pp_stream = NULL;
1331     p_ogg->i_streams = 0;
1332     p_ogg->p_stream_video = NULL;
1333     p_ogg->p_stream_audio = NULL;
1334     p_ogg->p_stream_spu = NULL;
1335 }
1336
1337 /*****************************************************************************
1338  * Deactivate: frees unused data
1339  *****************************************************************************/
1340 static void Deactivate( vlc_object_t *p_this )
1341 {
1342     input_thread_t *p_input = (input_thread_t *)p_this;
1343     demux_sys_t *p_ogg = (demux_sys_t *)p_input->p_demux_data  ;
1344
1345     if( p_ogg )
1346     {
1347         /* Cleanup the bitstream parser */
1348         ogg_sync_clear( &p_ogg->oy );
1349
1350         Ogg_EndOfStream( p_input, p_ogg );
1351
1352         free( p_ogg );
1353     }
1354 }
1355
1356 /*****************************************************************************
1357  * Demux: reads and demuxes data packets
1358  *****************************************************************************
1359  * Returns -1 in case of error, 0 in case of EOF, 1 otherwise
1360  *****************************************************************************/
1361 static int Demux( input_thread_t * p_input )
1362 {
1363     demux_sys_t *p_ogg = (demux_sys_t *)p_input->p_demux_data;
1364     ogg_page    oggpage;
1365     ogg_packet  oggpacket;
1366     int         i_stream;
1367
1368     if( p_ogg->b_eos )
1369     {
1370         if( Ogg_BeginningOfStream( p_input, p_ogg ) != VLC_SUCCESS ) return 0;
1371         p_ogg->b_eos = VLC_FALSE;
1372
1373         msg_Dbg( p_input, "beginning of a group of logical streams" );
1374
1375         p_input->stream.p_selected_program->i_synchro_state = SYNCHRO_REINIT;
1376         input_ClockManageRef( p_input, p_input->stream.p_selected_program, 0 );
1377     }
1378
1379 #define p_stream p_ogg->pp_stream[i_stream]
1380
1381     /* detect new selected/unselected streams */
1382     for( i_stream = 0; i_stream < p_ogg->i_streams; i_stream++ )
1383     {
1384         if( p_stream->p_es )
1385         {
1386             if( p_stream->p_es->p_decoder_fifo &&
1387                 !p_stream->i_activated )
1388             {
1389                 Ogg_ElemStreamStart( p_input, p_ogg, i_stream );
1390             }
1391             else
1392             if( !p_stream->p_es->p_decoder_fifo &&
1393                 p_stream->i_activated )
1394             {
1395                 Ogg_ElemStreamStop( p_input, p_ogg, i_stream );
1396             }
1397         }
1398     }
1399
1400     /* search for new video and audio stream to select
1401      * if current have been unselected */
1402     if( ( !p_ogg->p_stream_video )
1403             || ( !p_ogg->p_stream_video->p_es->p_decoder_fifo ) )
1404     {
1405         p_ogg->p_stream_video = NULL;
1406         for( i_stream = 0; i_stream < p_ogg->i_streams; i_stream++ )
1407         {
1408             if( ( p_stream->i_cat == VIDEO_ES )
1409                   &&( p_stream->p_es->p_decoder_fifo ) )
1410             {
1411                 p_ogg->p_stream_video = p_stream;
1412                 break;
1413             }
1414         }
1415     }
1416     if( ( !p_ogg->p_stream_audio )
1417             ||( !p_ogg->p_stream_audio->p_es->p_decoder_fifo ) )
1418     {
1419         p_ogg->p_stream_audio = NULL;
1420         for( i_stream = 0; i_stream < p_ogg->i_streams; i_stream++ )
1421         {
1422             if( ( p_stream->i_cat == AUDIO_ES )
1423                   &&( p_stream->p_es->p_decoder_fifo ) )
1424             {
1425                 p_ogg->p_stream_audio = p_stream;
1426                 break;
1427             }
1428         }
1429     }
1430
1431     if( p_input->stream.p_selected_program->i_synchro_state == SYNCHRO_REINIT )
1432     {
1433         msg_Warn( p_input, "synchro reinit" );
1434
1435         for( i_stream = 0; i_stream < p_ogg->i_streams; i_stream++ )
1436         {
1437             /* we'll trash all the data until we find the next pcr */
1438             p_stream->b_reinit = 1;
1439             p_stream->i_pcr = -1;
1440             p_stream->i_interpolated_pcr = -1;
1441         }
1442     }
1443
1444
1445     /*
1446      * Demux an ogg page from the stream
1447      */
1448     if( Ogg_ReadPage( p_input, p_ogg, &oggpage ) != VLC_SUCCESS )
1449     {
1450         return 0; /* EOF */
1451     }
1452
1453     /* Test for End of Stream */
1454     if( ogg_page_eos( &oggpage ) )
1455     {
1456         msg_Dbg( p_input, "end of a group of logical streams" );
1457
1458         Ogg_EndOfStream( p_input, p_ogg );
1459         p_ogg->b_eos = VLC_TRUE;
1460         return 1;
1461     }
1462
1463     for( i_stream = 0; i_stream < p_ogg->i_streams; i_stream++ )
1464     {
1465         if( ogg_stream_pagein( &p_stream->os, &oggpage ) != 0 )
1466             continue;
1467
1468         while( ogg_stream_packetout( &p_stream->os, &oggpacket ) > 0 )
1469         {
1470             if( !p_stream->p_es )
1471             {
1472                 break;
1473             }
1474
1475             if( p_stream->b_reinit )
1476             {
1477                 /* If synchro is re-initialized we need to drop all the packets
1478                  * until we find a new dated one. */
1479                 Ogg_UpdatePCR( p_stream, &oggpacket );
1480
1481                 if( p_stream->i_pcr >= 0 )
1482                 {
1483                     p_stream->b_reinit = 0;
1484                 }
1485                 else
1486                 {
1487                     p_stream->i_interpolated_pcr = -1;
1488                     continue;
1489                 }
1490
1491                 /* An Ogg/vorbis packet contains an end date granulepos */
1492                 if( p_stream->i_fourcc == VLC_FOURCC( 'v','o','r','b' ) )
1493                 {
1494                     if( ogg_stream_packetout( &p_stream->os, &oggpacket ) > 0 )
1495                     {
1496                         Ogg_DecodePacket( p_input, p_stream, &oggpacket );
1497                     }
1498                     continue;
1499                 }
1500             }
1501
1502             Ogg_DecodePacket( p_input, p_stream, &oggpacket );
1503         }
1504         break;
1505     }
1506
1507     i_stream = 0; p_ogg->i_pcr = -1;
1508     for( ; i_stream < p_ogg->i_streams; i_stream++ )
1509     {
1510         if( p_stream->i_cat == SPU_ES )
1511             continue;
1512         if( p_stream->i_interpolated_pcr < 0 )
1513             continue;
1514
1515         if( p_ogg->i_pcr < 0 || p_stream->i_interpolated_pcr < p_ogg->i_pcr )
1516             p_ogg->i_pcr = p_stream->i_interpolated_pcr;
1517     }
1518
1519     if( p_input->stream.p_selected_program->i_synchro_state != SYNCHRO_REINIT )
1520     {
1521         input_ClockManageRef( p_input, p_input->stream.p_selected_program,
1522                               p_ogg->i_pcr );
1523     }
1524
1525 #undef p_stream
1526
1527     return 1;
1528 }
1529
1530 /*****************************************************************************
1531  * Control:
1532  *****************************************************************************/
1533 static int Control( input_thread_t *p_input, int i_query, va_list args )
1534 {
1535     demux_sys_t *p_ogg  = (demux_sys_t *)p_input->p_demux_data;
1536     int64_t *pi64;
1537
1538     switch( i_query )
1539     {
1540         case DEMUX_GET_TIME:
1541             pi64 = (int64_t*)va_arg( args, int64_t * );
1542             *pi64 = p_ogg->i_pcr * 100 / 9;
1543             return VLC_SUCCESS;
1544
1545         default:
1546             return demux_vaControlDefault( p_input, i_query, args );
1547     }
1548 }