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 1.34 2003/09/25 23:09:41 gbazin Exp $
   6  *
   7  * Authors: Gildas Bazin <gbazin@netcourrier.com>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
  22  *****************************************************************************/
  23
  24 /*****************************************************************************
  25  * Preamble
  26  *****************************************************************************/
  27 #include <stdlib.h>                                      /* malloc(), free() */
  28 #include <string.h>
  29
  30 #include <vlc/vlc.h>
  31 #include <vlc/input.h>
  32
  33 #include <sys/types.h>
  34
  35 #include <ogg/ogg.h>
  36
  37 #include <codecs.h>                        /* BITMAPINFOHEADER, WAVEFORMATEX */
  38
  39 #define OGG_BLOCK_SIZE 4096
  40 #define PAGES_READ_ONCE 1
  41
  42 /*****************************************************************************
  43  * Definitions of structures and functions used by this plugins
  44  *****************************************************************************/
  45 typedef struct logical_stream_s
  46 {
  47     ogg_stream_state os;                        /* logical stream of packets */
  48
  49     int              i_serial_no;
  50     int              i_cat;                            /* AUDIO_ES, VIDEO_ES */
  51     int              i_activated;
  52     vlc_fourcc_t     i_fourcc;
  53     vlc_fourcc_t     i_codec;
  54
  55     es_descriptor_t  *p_es;
  56     int              b_selected;                           /* newly selected */
  57
  58     /* the header of some logical streams (eg vorbis) contain essential
  59      * data for the decoder. We back them up here in case we need to re-feed
  60      * them to the decoder. */
  61     int              b_force_backup;
  62     int              i_packets_backup;
  63     ogg_packet       *p_packets_backup;
  64
  65     /* program clock reference (in units of 90kHz) derived from the previous
  66      * granulepos */
  67     mtime_t          i_pcr;
  68     mtime_t          i_interpolated_pcr;
  69     mtime_t          i_previous_pcr;
  70
  71     /* info from logical streams */
  72     double f_rate;
  73     int i_bitrate;
  74     int i_channels;
  75     int b_reinit;
  76
  77     /* codec specific stuff */
  78     BITMAPINFOHEADER *p_bih;
  79     WAVEFORMATEX *p_wf;
  80     int i_theora_keyframe_granule_shift;
  81
  82 } logical_stream_t;
  83
  84 struct demux_sys_t
  85 {
  86     ogg_sync_state oy;        /* sync and verify incoming physical bitstream */
  87
  88     int i_streams;                           /* number of logical bitstreams */
  89     logical_stream_t **pp_stream;  /* pointer to an array of logical streams */
  90
  91     /* current audio and video es */
  92     logical_stream_t *p_stream_video;
  93     logical_stream_t *p_stream_audio;
  94     logical_stream_t *p_stream_spu;
  95
  96     /* program clock reference (in units of 90kHz) derived from the pcr of
  97      * the sub-streams */
  98     mtime_t i_pcr;
  99
 100     int     b_seekable;
 101     int     b_reinit;
 102 };
 103
 104 /* OggDS headers for the new header format (used in ogm files) */
 105 typedef struct stream_header_video
 106 {
 107     ogg_int32_t width;
 108     ogg_int32_t height;
 109 } stream_header_video;
 110
 111 typedef struct stream_header_audio
 112 {
 113     ogg_int16_t channels;
 114     ogg_int16_t blockalign;
 115     ogg_int32_t avgbytespersec;
 116 } stream_header_audio;
 117
 118 typedef struct stream_header
 119 {
 120     char        streamtype[8];
 121     char        subtype[4];
 122
 123     ogg_int32_t size;                               /* size of the structure */
 124
 125     ogg_int64_t time_unit;                              /* in reference time */
 126     ogg_int64_t samples_per_unit;
 127     ogg_int32_t default_len;                                /* in media time */
 128
 129     ogg_int32_t buffersize;
 130     ogg_int16_t bits_per_sample;
 131
 132     union
 133     {
 134         /* Video specific */
 135         stream_header_video video;
 136         /* Audio specific */
 137         stream_header_audio audio;
 138     } sh;
 139 } stream_header;
 140
 141 /* Some defines from OggDS */
 142 #define PACKET_TYPE_HEADER   0x01
 143 #define PACKET_TYPE_BITS     0x07
 144 #define PACKET_LEN_BITS01    0xc0
 145 #define PACKET_LEN_BITS2     0x02
 146 #define PACKET_IS_SYNCPOINT  0x08
 147
 148 /*****************************************************************************
 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_StreamStart  ( input_thread_t *, demux_sys_t *, int );
 157 static void Ogg_StreamStop   ( 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 static int  Ogg_FindLogicalStreams( input_thread_t *p_input,
 166                                     demux_sys_t *p_ogg );
 167
 168 /*****************************************************************************
 169  * Module descriptor
 170  *****************************************************************************/
 171 vlc_module_begin();
 172     set_description( _("ogg stream demuxer" ) );
 173     set_capability( "demux", 50 );
 174     set_callbacks( Activate, Deactivate );
 175     add_shortcut( "ogg" );
 176 vlc_module_end();
 177
 178 /*****************************************************************************
 179  * Stream managment
 180  *****************************************************************************/
 181 static int Ogg_StreamStart( input_thread_t *p_input,
 182                             demux_sys_t *p_ogg, int i_stream )
 183 {
 184 #define p_stream p_ogg->pp_stream[i_stream]
 185     if( !p_stream->p_es )
 186     {
 187         msg_Warn( p_input, "stream[%d] unselectable", i_stream );
 188         return( 0 );
 189     }
 190     if( p_stream->i_activated )
 191     {
 192         msg_Warn( p_input, "stream[%d] already selected", i_stream );
 193         return( 1 );
 194     }
 195
 196     if( !p_stream->p_es->p_decoder_fifo )
 197     {
 198         vlc_mutex_lock( &p_input->stream.stream_lock );
 199         input_SelectES( p_input, p_stream->p_es );
 200         vlc_mutex_unlock( &p_input->stream.stream_lock );
 201     }
 202     p_stream->i_activated = p_stream->p_es->p_decoder_fifo ? 1 : 0;
 203
 204     /* Feed the backup header to the decoder */
 205     if( !p_stream->b_force_backup )
 206     {
 207         int i;
 208         for( i = 0; i < p_stream->i_packets_backup; i++ )
 209         {
 210             /* Set correct starting date in the last header packet */
 211             if( i == p_stream->i_packets_backup -1 )
 212                 p_stream->p_packets_backup[i].granulepos =
 213                     p_stream->i_interpolated_pcr * p_stream->f_rate / 90000;
 214
 215             Ogg_DecodePacket( p_input, p_stream,
 216                               &p_stream->p_packets_backup[i] );
 217         }
 218     }
 219
 220     return( p_stream->i_activated );
 221 #undef  p_stream
 222 }
 223
 224 static void Ogg_StreamStop( input_thread_t *p_input,
 225                             demux_sys_t *p_ogg, int i_stream )
 226 {
 227 #define p_stream    p_ogg->pp_stream[i_stream]
 228
 229     if( !p_stream->i_activated )
 230     {
 231         msg_Warn( p_input, "stream[%d] already unselected", i_stream );
 232         return;
 233     }
 234
 235     if( p_stream->p_es->p_decoder_fifo )
 236     {
 237         vlc_mutex_lock( &p_input->stream.stream_lock );
 238         input_UnselectES( p_input, p_stream->p_es );
 239         vlc_mutex_unlock( &p_input->stream.stream_lock );
 240     }
 241
 242     p_stream->i_activated = 0;
 243
 244 #undef  p_stream
 245 }
 246
 247 /****************************************************************************
 248  * Ogg_Check: Check we are dealing with an ogg stream.
 249  ****************************************************************************/
 250 static int Ogg_Check( input_thread_t *p_input )
 251 {
 252     u8 *p_peek;
 253     int i_size = input_Peek( p_input, &p_peek, 4 );
 254
 255     /* Check for the Ogg capture pattern */
 256     if( !(i_size>3) || !(p_peek[0] == 'O') || !(p_peek[1] == 'g') ||
 257         !(p_peek[2] == 'g') || !(p_peek[3] == 'S') )
 258         return VLC_EGENERIC;
 259
 260     /* FIXME: Capture pattern might not be enough so we can also check for the
 261      * the first complete page */
 262
 263     return VLC_SUCCESS;
 264 }
 265
 266 /****************************************************************************
 267  * Ogg_ReadPage: Read a full Ogg page from the physical bitstream.
 268  ****************************************************************************
 269  * Returns VLC_SUCCESS if a page has been read. An error might happen if we
 270  * are at the end of stream.
 271  ****************************************************************************/
 272 static int Ogg_ReadPage( input_thread_t *p_input, demux_sys_t *p_ogg,
 273                          ogg_page *p_oggpage )
 274 {
 275     int i_read = 0;
 276     data_packet_t *p_data;
 277     byte_t *p_buffer;
 278
 279     while( ogg_sync_pageout( &p_ogg->oy, p_oggpage ) != 1 )
 280     {
 281         i_read = input_SplitBuffer( p_input, &p_data, OGG_BLOCK_SIZE );
 282         if( i_read <= 0 )
 283             return VLC_EGENERIC;
 284
 285         p_buffer = ogg_sync_buffer( &p_ogg->oy, i_read );
 286         p_input->p_vlc->pf_memcpy( p_buffer, p_data->p_payload_start, i_read );
 287         ogg_sync_wrote( &p_ogg->oy, i_read );
 288         input_DeletePacket( p_input->p_method_data, p_data );
 289     }
 290
 291     return VLC_SUCCESS;
 292 }
 293
 294 /****************************************************************************
 295  * Ogg_UpdatePCR: update the PCR (90kHz program clock reference) for the
 296  *                current stream.
 297  ****************************************************************************/
 298 static void Ogg_UpdatePCR( logical_stream_t *p_stream,
 299                            ogg_packet *p_oggpacket )
 300 {
 301     /* Convert the granulepos into a pcr */
 302     if( p_oggpacket->granulepos >= 0 )
 303     {
 304         if( p_stream->i_fourcc != VLC_FOURCC( 't','h','e','o' ) )
 305         {
 306             p_stream->i_pcr = p_oggpacket->granulepos * 90000
 307                               / p_stream->f_rate;
 308         }
 309         else
 310         {
 311             ogg_int64_t iframe = p_oggpacket->granulepos >>
 312               p_stream->i_theora_keyframe_granule_shift;
 313             ogg_int64_t pframe = p_oggpacket->granulepos -
 314               ( iframe << p_stream->i_theora_keyframe_granule_shift );
 315
 316             p_stream->i_pcr = ( iframe + pframe ) * 90000
 317                               / p_stream->f_rate;
 318         }
 319
 320         p_stream->i_interpolated_pcr = p_stream->i_pcr;
 321     }
 322     else
 323     {
 324         p_stream->i_pcr = -1;
 325
 326         /* no granulepos available, try to interpolate the pcr.
 327          * If we can't then don't touch the old value. */
 328         if( p_stream->i_cat == VIDEO_ES )
 329             /* 1 frame per packet */
 330             p_stream->i_interpolated_pcr += (90000 / p_stream->f_rate);
 331         else if( p_stream->i_bitrate )
 332             p_stream->i_interpolated_pcr += ( p_oggpacket->bytes * 90000
 333                                               / p_stream->i_bitrate / 8 );
 334     }
 335 }
 336
 337 /****************************************************************************
 338  * Ogg_DecodePacket: Decode an Ogg packet.
 339  ****************************************************************************/
 340 static void Ogg_DecodePacket( input_thread_t *p_input,
 341                               logical_stream_t *p_stream,
 342                               ogg_packet *p_oggpacket )
 343 {
 344     pes_packet_t  *p_pes;
 345     data_packet_t *p_data;
 346     vlc_bool_t b_trash = VLC_FALSE;
 347     int i_header_len = 0;
 348
 349     if( p_stream->b_force_backup )
 350     {
 351         ogg_packet *p_packet_backup;
 352         p_stream->i_packets_backup++;
 353         switch( p_stream->i_fourcc )
 354         {
 355         case VLC_FOURCC( 'v','o','r','b' ):
 356         case VLC_FOURCC( 't','h','e','o' ):
 357           if( p_stream->i_packets_backup == 3 ) p_stream->b_force_backup = 0;
 358           break;
 359
 360         default:
 361           p_stream->b_force_backup = 0;
 362           break;
 363         }
 364
 365         /* Backup the ogg packet (likely an header packet) */
 366         p_stream->p_packets_backup =
 367             realloc( p_stream->p_packets_backup, p_stream->i_packets_backup *
 368                      sizeof(ogg_packet) );
 369
 370         p_packet_backup =
 371             &p_stream->p_packets_backup[p_stream->i_packets_backup - 1];
 372
 373         p_packet_backup->bytes = p_oggpacket->bytes;
 374         if( p_stream->b_force_backup ) p_oggpacket->granulepos = -1;
 375         p_packet_backup->granulepos = p_oggpacket->granulepos;
 376         p_packet_backup->packet = malloc( p_oggpacket->bytes );
 377         if( !p_packet_backup->packet ) return;
 378         memcpy( p_packet_backup->packet, p_oggpacket->packet,
 379                 p_oggpacket->bytes );
 380     }
 381
 382     vlc_mutex_lock( &p_input->stream.control.control_lock );
 383     if( p_stream->i_cat == AUDIO_ES && p_input->stream.control.b_mute )
 384     {
 385         b_trash = VLC_TRUE;
 386     }
 387     vlc_mutex_unlock( &p_input->stream.control.control_lock );
 388
 389     if( !p_stream->p_es->p_decoder_fifo || b_trash )
 390     {
 391         /* This stream isn't currently selected so we don't need to decode it,
 392          * but we do need to store its pcr as it might be selected later on. */
 393
 394         if( p_stream->i_pcr >= 0 )
 395         {
 396             /* This is for streams where the granulepos of the header packets
 397              * doesn't match these of the data packets (eg. ogg web radios). */
 398             if( p_stream->i_previous_pcr == 0 &&
 399                 p_stream->i_pcr  > 3 * DEFAULT_PTS_DELAY * 9/100 )
 400                 p_input->stream.p_selected_program->i_synchro_state =
 401                     SYNCHRO_REINIT;
 402
 403             p_stream->i_previous_pcr = p_stream->i_pcr;
 404
 405             /* Call the pace control */
 406             if( p_input->stream.p_selected_program->i_synchro_state ==
 407                 SYNCHRO_REINIT )
 408             input_ClockManageRef( p_input,
 409                                   p_input->stream.p_selected_program,
 410                                   p_stream->i_pcr );
 411         }
 412
 413         Ogg_UpdatePCR( p_stream, p_oggpacket );
 414
 415         return;
 416     }
 417
 418     if( !( p_pes = input_NewPES( p_input->p_method_data ) ) )
 419     {
 420         return;
 421     }
 422     if( !( p_data = input_NewPacket( p_input->p_method_data,
 423                                      p_oggpacket->bytes ) ) )
 424     {
 425         input_DeletePES( p_input->p_method_data, p_pes );
 426         return;
 427     }
 428     p_data->p_payload_end = p_data->p_payload_start + p_oggpacket->bytes;
 429
 430     /* Convert the pcr into a pts */
 431     if( p_stream->i_fourcc == VLC_FOURCC( 'v','o','r','b' ) )
 432     {
 433         if( p_stream->i_pcr >= 0 )
 434         {
 435             /* This is for streams where the granulepos of the header packets
 436              * doesn't match these of the data packets (eg. ogg web radios). */
 437             if( p_stream->i_previous_pcr == 0 &&
 438                 p_stream->i_pcr  > 3 * DEFAULT_PTS_DELAY * 9/100 )
 439                 p_input->stream.p_selected_program->i_synchro_state =
 440                     SYNCHRO_REINIT;
 441
 442             p_stream->i_previous_pcr = p_stream->i_pcr;
 443
 444             /* Call the pace control */
 445             if( p_input->stream.p_selected_program->i_synchro_state ==
 446                 SYNCHRO_REINIT )
 447             input_ClockManageRef( p_input,
 448                                   p_input->stream.p_selected_program,
 449                                   p_stream->i_pcr );
 450         }
 451
 452         /* The granulepos is the end date of the sample */
 453         p_pes->i_pts = ( p_stream->i_pcr < 0 ) ? 0 :
 454             input_ClockGetTS( p_input, p_input->stream.p_selected_program,
 455                               p_stream->i_pcr );
 456
 457         /* Convert the granulepos into the next pcr */
 458         Ogg_UpdatePCR( p_stream, p_oggpacket );
 459     }
 460     else
 461     {
 462         /* Convert the granulepos into the current pcr */
 463         Ogg_UpdatePCR( p_stream, p_oggpacket );
 464
 465         if( p_stream->i_pcr >= 0 )
 466         {
 467             /* This is for streams where the granulepos of the header packets
 468              * doesn't match these of the data packets (eg. ogg web radios). */
 469             if( p_stream->i_previous_pcr == 0 &&
 470                 p_stream->i_pcr  > 3 * DEFAULT_PTS_DELAY * 9/100 )
 471                 p_input->stream.p_selected_program->i_synchro_state =
 472                     SYNCHRO_REINIT;
 473
 474             p_stream->i_previous_pcr = p_stream->i_pcr;
 475
 476             /* Call the pace control */
 477             if( p_input->stream.p_selected_program->i_synchro_state ==
 478                 SYNCHRO_REINIT )
 479             input_ClockManageRef( p_input,
 480                                   p_input->stream.p_selected_program,
 481                                   p_stream->i_pcr );
 482         }
 483
 484         /* The granulepos is the start date of the sample */
 485         p_pes->i_pts = ( p_stream->i_pcr < 0 ) ? 0 :
 486             input_ClockGetTS( p_input, p_input->stream.p_selected_program,
 487                               p_stream->i_pcr );
 488     }
 489
 490     p_pes->i_nb_data = 1;
 491     p_pes->i_dts = p_pes->i_pts;
 492     p_pes->p_first = p_pes->p_last = p_data;
 493     p_pes->i_pes_size = p_oggpacket->bytes;
 494
 495     if( p_stream->i_fourcc != VLC_FOURCC( 'v','o','r','b' ) &&
 496         p_stream->i_fourcc != VLC_FOURCC( 't','a','r','k' ) &&
 497         p_stream->i_fourcc != VLC_FOURCC( 't','h','e','o' ) )
 498     {
 499         /* Remove the header from the packet */
 500         i_header_len = (*p_oggpacket->packet & PACKET_LEN_BITS01) >> 6;
 501         i_header_len |= (*p_oggpacket->packet & PACKET_LEN_BITS2) << 1;
 502         i_header_len++;
 503
 504         p_pes->i_pes_size -= i_header_len;
 505     }
 506
 507     if( p_stream->i_fourcc == VLC_FOURCC( 't','a','r','k' ) )
 508     {
 509         /* FIXME: the biggest hack I've ever done */
 510         msg_Warn( p_input, "tark pts: "I64Fd", granule: "I64Fd,
 511                   p_pes->i_pts, p_pes->i_dts );
 512         msleep(10000);
 513     }
 514
 515     memcpy( p_data->p_payload_start,
 516             p_oggpacket->packet + i_header_len,
 517             p_oggpacket->bytes - i_header_len );
 518
 519     p_data->p_payload_end = p_data->p_payload_start + p_pes->i_pes_size;
 520     p_data->b_discard_payload = 0;
 521
 522     input_DecodePES( p_stream->p_es->p_decoder_fifo, p_pes );
 523 }
 524
 525 /****************************************************************************
 526  * Ogg_FindLogicalStreams: Find the logical streams embedded in the physical
 527  *                         stream and fill p_ogg.
 528  *****************************************************************************
 529  * The initial page of a logical stream is marked as a 'bos' page.
 530  * Furthermore, the Ogg specification mandates that grouped bitstreams begin
 531  * together and all of the initial pages must appear before any data pages.
 532  *
 533  * On success this function returns VLC_SUCCESS.
 534  ****************************************************************************/
 535 static int Ogg_FindLogicalStreams( input_thread_t *p_input, demux_sys_t *p_ogg)
 536 {
 537     ogg_packet oggpacket;
 538     ogg_page oggpage;
 539     int i_stream;
 540
 541     while( Ogg_ReadPage( p_input, p_ogg, &oggpage ) == VLC_SUCCESS )
 542     {
 543         if( ogg_page_bos( &oggpage ) )
 544         {
 545
 546             /* All is wonderful in our fine fine little world.
 547              * We found the beginning of our first logical stream. */
 548             while( ogg_page_bos( &oggpage ) )
 549             {
 550                 p_ogg->i_streams++;
 551                 p_ogg->pp_stream =
 552                     realloc( p_ogg->pp_stream, p_ogg->i_streams *
 553                              sizeof(logical_stream_t *) );
 554
 555 #define p_stream p_ogg->pp_stream[p_ogg->i_streams - 1]
 556
 557                 p_stream = malloc( sizeof(logical_stream_t) );
 558                 memset( p_stream, 0, sizeof(logical_stream_t) );
 559
 560                 /* Setup the logical stream */
 561                 p_stream->i_serial_no = ogg_page_serialno( &oggpage );
 562                 ogg_stream_init( &p_stream->os, p_stream->i_serial_no );
 563
 564                 /* Extract the initial header from the first page and verify
 565                  * the codec type of tis Ogg bitstream */
 566                 if( ogg_stream_pagein( &p_stream->os, &oggpage ) < 0 )
 567                 {
 568                     /* error. stream version mismatch perhaps */
 569                     msg_Err( p_input, "Error reading first page of "
 570                              "Ogg bitstream data" );
 571                     return VLC_EGENERIC;
 572                 }
 573
 574                 /* FIXME: check return value */
 575                 ogg_stream_packetpeek( &p_stream->os, &oggpacket );
 576
 577                 /* Check for Vorbis header */
 578                 if( oggpacket.bytes >= 7 &&
 579                     ! strncmp( &oggpacket.packet[1], "vorbis", 6 ) )
 580                 {
 581                     oggpack_buffer opb;
 582
 583                     msg_Dbg( p_input, "found vorbis header" );
 584                     p_stream->i_cat = AUDIO_ES;
 585                     p_stream->i_fourcc = VLC_FOURCC( 'v','o','r','b' );
 586
 587                     /* Signal that we want to keep a backup of the vorbis
 588                      * stream headers. They will be used when switching between
 589                      * audio streams. */
 590                     p_stream->b_force_backup = 1;
 591
 592                     /* Cheat and get additionnal info ;) */
 593                     oggpack_readinit( &opb, oggpacket.packet, oggpacket.bytes);
 594                     oggpack_adv( &opb, 88 );
 595                     p_stream->i_channels = oggpack_read( &opb, 8 );
 596                     p_stream->f_rate = oggpack_read( &opb, 32 );
 597                     oggpack_adv( &opb, 32 );
 598                     p_stream->i_bitrate = oggpack_read( &opb, 32 );
 599                     {
 600                         char title[sizeof("Stream") + 10];
 601                         input_info_category_t *p_cat;
 602                         sprintf( title, "Stream %d", p_ogg->i_streams );
 603                         p_cat = input_InfoCategory( p_input, title );
 604                         input_AddInfo( p_cat, _("Type"), _("Audio") );
 605                         input_AddInfo( p_cat, _("Codec"), _("Vorbis") );
 606                         input_AddInfo( p_cat, _("Sample Rate"), "%f",
 607                                        p_stream->f_rate );
 608                         input_AddInfo( p_cat, _("Channels"), "%d",
 609                                        p_stream->i_channels );
 610                         input_AddInfo( p_cat, _("Bit Rate"), "%d",
 611                                        p_stream->i_bitrate );
 612                     }
 613                 }
 614                 /* Check for Theora header */
 615                 else if( oggpacket.bytes >= 7 &&
 616                          ! strncmp( &oggpacket.packet[1], "theora", 6 ) )
 617                 {
 618 #ifdef HAVE_OGGPACKB
 619                     oggpack_buffer opb;
 620                     int i_fps_numerator;
 621                     int i_fps_denominator;
 622                     int i_keyframe_frequency_force;
 623 #endif
 624
 625                     msg_Dbg( p_input, "found theora header" );
 626 #ifdef HAVE_OGGPACKB
 627                     p_stream->i_cat = VIDEO_ES;
 628                     p_stream->i_fourcc = VLC_FOURCC( 't','h','e','o' );
 629
 630                     /* Signal that we want to keep a backup of the vorbis
 631                      * stream headers. They will be used when switching between
 632                      * audio streams. */
 633                     p_stream->b_force_backup = 1;
 634
 635                     /* Cheat and get additionnal info ;) */
 636                     oggpackB_readinit(&opb, oggpacket.packet, oggpacket.bytes);
 637                     oggpackB_adv( &opb, 56 );
 638                     oggpackB_read( &opb, 8 ); /* major version num */
 639                     oggpackB_read( &opb, 8 ); /* minor version num */
 640                     oggpackB_read( &opb, 8 ); /* subminor version num */
 641                     oggpackB_read( &opb, 16 ) /*<< 4*/; /* width */
 642                     oggpackB_read( &opb, 16 ) /*<< 4*/; /* height */
 643                     oggpackB_read( &opb, 24 ); /* frame width */
 644                     oggpackB_read( &opb, 24 ); /* frame height */
 645                     oggpackB_read( &opb, 8 ); /* x offset */
 646                     oggpackB_read( &opb, 8 ); /* y offset */
 647
 648                     i_fps_numerator = oggpackB_read( &opb, 32 );
 649                     i_fps_denominator = oggpackB_read( &opb, 32 );
 650                     oggpackB_read( &opb, 24 ); /* aspect_numerator */
 651                     oggpackB_read( &opb, 24 ); /* aspect_denominator */
 652                     i_keyframe_frequency_force = 1 << oggpackB_read( &opb, 5 );
 653                     oggpackB_read( &opb, 8 ); /* colorspace */
 654                     p_stream->i_bitrate = oggpackB_read( &opb, 24 );
 655                     oggpackB_read( &opb, 6 ); /* quality */
 656
 657                     /* granule_shift = i_log( frequency_force -1 ) */
 658                     p_stream->i_theora_keyframe_granule_shift = 0;
 659                     i_keyframe_frequency_force--;
 660                     while( i_keyframe_frequency_force )
 661                     {
 662                         p_stream->i_theora_keyframe_granule_shift++;
 663                         i_keyframe_frequency_force >>= 1;
 664                     }
 665
 666                     p_stream->f_rate = ((float)i_fps_numerator) /
 667                                                 i_fps_denominator;
 668                     msg_Dbg( p_input,
 669                              "found theora header, bitrate: %i, rate: %f",
 670                              p_stream->i_bitrate, p_stream->f_rate );
 671                     {
 672                         char title[sizeof("Stream") + 10];
 673                         input_info_category_t *p_cat;
 674                         sprintf( title, "Stream %d", p_ogg->i_streams );
 675                         p_cat = input_InfoCategory( p_input, title );
 676                         input_AddInfo( p_cat, _("Type"), _("Video") );
 677                         input_AddInfo( p_cat, _("Codec"), _("Theora") );
 678                         input_AddInfo( p_cat, _("Frame Rate"), "%f",
 679                                        p_stream->f_rate );
 680                         input_AddInfo( p_cat, _("Bit Rate"), "%d",
 681                                        p_stream->i_bitrate );
 682                     }
 683 #else /* HAVE_OGGPACKB */
 684                     msg_Dbg( p_input, "the ogg demuxer has been compiled "
 685                              "without support for the oggpackB extension."
 686                              "The theora stream won't be decoded." );
 687                     free( p_stream );
 688                     p_ogg->i_streams--;
 689                     continue;
 690 #endif /* HAVE_OGGPACKB */
 691                 }
 692                 /* Check for Tarkin header */
 693                 else if( oggpacket.bytes >= 7 &&
 694                          ! strncmp( &oggpacket.packet[1], "tarkin", 6 ) )
 695                 {
 696                     oggpack_buffer opb;
 697
 698                     msg_Dbg( p_input, "found tarkin header" );
 699                     p_stream->i_cat = VIDEO_ES;
 700                     p_stream->i_fourcc = VLC_FOURCC( 't','a','r','k' );
 701
 702                     /* Cheat and get additionnal info ;) */
 703                     oggpack_readinit( &opb, oggpacket.packet, oggpacket.bytes);
 704                     oggpack_adv( &opb, 88 );
 705                     oggpack_adv( &opb, 104 );
 706                     p_stream->i_bitrate = oggpack_read( &opb, 32 );
 707                     p_stream->f_rate = 2; /* FIXME */
 708                     msg_Dbg( p_input,
 709                              "found tarkin header, bitrate: %i, rate: %f",
 710                              p_stream->i_bitrate, p_stream->f_rate );
 711                                         {
 712                         char title[sizeof("Stream") + 10];
 713                         input_info_category_t *p_cat;
 714                         sprintf( title, "Stream %d", p_ogg->i_streams );
 715                         p_cat = input_InfoCategory( p_input, title );
 716                         input_AddInfo( p_cat, _("Type"), _("Video") );
 717                         input_AddInfo( p_cat, _("Codec"), _("tarkin") );
 718                         input_AddInfo( p_cat, _("Sample Rate"), "%f",
 719                                        p_stream->f_rate );
 720                         input_AddInfo( p_cat, _("Bit Rate"), "%d",
 721                                        p_stream->i_bitrate );
 722                     }
 723
 724                 }
 725                 else if( oggpacket.bytes >= 142 &&
 726                          !strncmp( &oggpacket.packet[1],
 727                                    "Direct Show Samples embedded in Ogg", 35 ))
 728                 {
 729                     /* Old header type */
 730
 731                     /* Check for video header (old format) */
 732                     if( GetDWLE((oggpacket.packet+96)) == 0x05589f80 &&
 733                         oggpacket.bytes >= 184 )
 734                     {
 735                         p_stream->i_cat = VIDEO_ES;
 736
 737                         p_stream->p_bih = (BITMAPINFOHEADER *)
 738                             malloc( sizeof(BITMAPINFOHEADER) );
 739                         if( !p_stream->p_bih )
 740                         {
 741                             /* Mem allocation error, just ignore the stream */
 742                             free( p_stream );
 743                             p_ogg->i_streams--;
 744                             continue;
 745                         }
 746                         p_stream->p_bih->biSize = sizeof(BITMAPINFOHEADER);
 747                         p_stream->p_bih->biCompression= p_stream->i_fourcc =
 748                             VLC_FOURCC( oggpacket.packet[68],
 749                                         oggpacket.packet[69],
 750                                         oggpacket.packet[70],
 751                                         oggpacket.packet[71] );
 752                         msg_Dbg( p_input, "found video header of type: %.4s",
 753                                  (char *)&p_stream->i_fourcc );
 754
 755                         p_stream->f_rate = 10000000.0 /
 756                             GetQWLE((oggpacket.packet+164));
 757                         p_stream->p_bih->biBitCount =
 758                             GetWLE((oggpacket.packet+182));
 759                         if( !p_stream->p_bih->biBitCount )
 760                             p_stream->p_bih->biBitCount=24; // hack, FIXME
 761                         p_stream->p_bih->biWidth =
 762                             GetDWLE((oggpacket.packet+176));
 763                         p_stream->p_bih->biHeight =
 764                             GetDWLE((oggpacket.packet+180));
 765                         p_stream->p_bih->biPlanes= 1 ;
 766                         p_stream->p_bih->biSizeImage =
 767                             (p_stream->p_bih->biBitCount >> 3) *
 768                             p_stream->p_bih->biWidth *
 769                             p_stream->p_bih->biHeight;
 770
 771                         msg_Dbg( p_input,
 772                              "fps: %f, width:%i; height:%i, bitcount:%i",
 773                             p_stream->f_rate, p_stream->p_bih->biWidth,
 774                             p_stream->p_bih->biHeight,
 775                             p_stream->p_bih->biBitCount);
 776                         {
 777                             char title[sizeof("Stream") + 10];
 778                             input_info_category_t *p_cat;
 779                             sprintf( title, "Stream %d", p_ogg->i_streams );
 780                             p_cat = input_InfoCategory( p_input, title );
 781                             input_AddInfo( p_cat, _("Type"), _("Video") );
 782                             input_AddInfo( p_cat, _("Codec"), "%.4s",
 783                                            (char *)&p_stream->i_fourcc );
 784                             input_AddInfo( p_cat, _("Frame Rate"), "%f",
 785                                            p_stream->f_rate );
 786                             input_AddInfo( p_cat, _("Bit Count"), "%d",
 787                                            p_stream->p_bih->biBitCount );
 788                             input_AddInfo( p_cat, _("Width"), "%d",
 789                                            p_stream->p_bih->biWidth );
 790                             input_AddInfo( p_cat, _("Height"), "%d",
 791                                            p_stream->p_bih->biHeight );
 792                         }
 793                         p_stream->i_bitrate = 0;
 794                     }
 795                     /* Check for audio header (old format) */
 796                     else if( GetDWLE((oggpacket.packet+96)) == 0x05589F81 )
 797                     {
 798                         unsigned int i_extra_size;
 799
 800                         p_stream->i_cat = AUDIO_ES;
 801
 802                         i_extra_size = GetWLE((oggpacket.packet+140));
 803
 804                         p_stream->p_wf = (WAVEFORMATEX *)
 805                             malloc( sizeof(WAVEFORMATEX) + i_extra_size );
 806                         if( !p_stream->p_wf )
 807                         {
 808                             /* Mem allocation error, just ignore the stream */
 809                             free( p_stream );
 810                             p_ogg->i_streams--;
 811                             continue;
 812                         }
 813
 814                         p_stream->p_wf->wFormatTag =
 815                             GetWLE((oggpacket.packet+124));
 816                         p_stream->p_wf->nChannels =
 817                             GetWLE((oggpacket.packet+126));
 818                         p_stream->f_rate = p_stream->p_wf->nSamplesPerSec =
 819                             GetDWLE((oggpacket.packet+128));
 820                         p_stream->i_bitrate = p_stream->p_wf->nAvgBytesPerSec =
 821                             GetDWLE((oggpacket.packet+132));
 822                         p_stream->i_bitrate *= 8;
 823                         p_stream->p_wf->nBlockAlign =
 824                             GetWLE((oggpacket.packet+136));
 825                         p_stream->p_wf->wBitsPerSample =
 826                             GetWLE((oggpacket.packet+138));
 827                         p_stream->p_wf->cbSize = i_extra_size;
 828
 829                         if( i_extra_size > 0 )
 830                             memcpy( p_stream->p_wf+sizeof(WAVEFORMATEX),
 831                                     oggpacket.packet+142, i_extra_size );
 832
 833                         switch( p_stream->p_wf->wFormatTag )
 834                         {
 835                         case WAVE_FORMAT_PCM:
 836                             p_stream->i_fourcc =
 837                                 VLC_FOURCC( 'a', 'r', 'a', 'w' );
 838                             break;
 839                         case WAVE_FORMAT_MPEG:
 840                         case WAVE_FORMAT_MPEGLAYER3:
 841                             p_stream->i_fourcc =
 842                                 VLC_FOURCC( 'm', 'p', 'g', 'a' );
 843                             break;
 844                         case WAVE_FORMAT_A52:
 845                             p_stream->i_fourcc =
 846                                 VLC_FOURCC( 'a', '5', '2', ' ' );
 847                             break;
 848                         case WAVE_FORMAT_WMA1:
 849                             p_stream->i_fourcc =
 850                                 VLC_FOURCC( 'w', 'm', 'a', '1' );
 851                             break;
 852                         case WAVE_FORMAT_WMA2:
 853                             p_stream->i_fourcc =
 854                                 VLC_FOURCC( 'w', 'm', 'a', '2' );
 855                             break;
 856                         default:
 857                             p_stream->i_fourcc = VLC_FOURCC( 'm', 's',
 858                                 ( p_stream->p_wf->wFormatTag >> 8 ) & 0xff,
 859                                 p_stream->p_wf->wFormatTag & 0xff );
 860                         }
 861
 862                         msg_Dbg( p_input, "found audio header of type: %.4s",
 863                                  (char *)&p_stream->i_fourcc );
 864                         msg_Dbg( p_input, "audio:0x%4.4x channels:%d %dHz "
 865                                  "%dbits/sample %dkb/s",
 866                                  p_stream->p_wf->wFormatTag,
 867                                  p_stream->p_wf->nChannels,
 868                                  p_stream->p_wf->nSamplesPerSec,
 869                                  p_stream->p_wf->wBitsPerSample,
 870                                  p_stream->p_wf->nAvgBytesPerSec * 8 / 1024 );
 871                         {
 872                             char title[sizeof("Stream") + 10];
 873                             input_info_category_t *p_cat;
 874                             sprintf( title, "Stream %d", p_ogg->i_streams );
 875                             p_cat = input_InfoCategory( p_input, title );
 876                             input_AddInfo( p_cat, _("Type"), _("Audio") );
 877                             input_AddInfo( p_cat, _("Codec"), "%.4s",
 878                                            (char *)&p_stream->i_fourcc );
 879                             input_AddInfo( p_cat, _("Sample Rate"), "%d",
 880                                            p_stream->p_wf->nSamplesPerSec );
 881                             input_AddInfo( p_cat, _("Bit Rate"), "%d",
 882                                            p_stream->p_wf->nAvgBytesPerSec * 8
 883                                               / 1024 );
 884                             input_AddInfo( p_cat, _("Channels"), "%d",
 885                                            p_stream->p_wf->nChannels );
 886                             input_AddInfo( p_cat, _("Bits per Sample"), "%d",
 887                                            p_stream->p_wf->wBitsPerSample );
 888                         }
 889
 890                     }
 891                     else
 892                     {
 893                         msg_Dbg( p_input, "stream %d has an old header "
 894                             "but is of an unknown type", p_ogg->i_streams-1 );
 895                         free( p_stream );
 896                         p_ogg->i_streams--;
 897                     }
 898                 }
 899                 else if( (*oggpacket.packet & PACKET_TYPE_BITS )
 900                          == PACKET_TYPE_HEADER &&
 901                          oggpacket.bytes >= (int)sizeof(stream_header)+1 )
 902                 {
 903                     stream_header *st = (stream_header *)(oggpacket.packet+1);
 904
 905                     /* Check for video header (new format) */
 906                     if( !strncmp( st->streamtype, "video", 5 ) )
 907                     {
 908                         p_stream->i_cat = VIDEO_ES;
 909
 910                         /* We need to get rid of the header packet */
 911                         ogg_stream_packetout( &p_stream->os, &oggpacket );
 912
 913                         p_stream->p_bih = (BITMAPINFOHEADER *)
 914                             malloc( sizeof(BITMAPINFOHEADER) );
 915                         if( !p_stream->p_bih )
 916                         {
 917                             /* Mem allocation error, just ignore the stream */
 918                             free( p_stream );
 919                             p_ogg->i_streams--;
 920                             continue;
 921                         }
 922                         p_stream->p_bih->biSize = sizeof(BITMAPINFOHEADER);
 923                         p_stream->p_bih->biCompression=
 924                             p_stream->i_fourcc = VLC_FOURCC( st->subtype[0],
 925                                                              st->subtype[1],
 926                                                              st->subtype[2],
 927                                                              st->subtype[3] );
 928                         msg_Dbg( p_input, "found video header of type: %.4s",
 929                                  (char *)&p_stream->i_fourcc );
 930
 931                         p_stream->f_rate = 10000000.0 /
 932                             GetQWLE(&st->time_unit);
 933                         p_stream->p_bih->biBitCount =
 934                             GetWLE(&st->bits_per_sample);
 935                         p_stream->p_bih->biWidth =
 936                             GetDWLE(&st->sh.video.width);
 937                         p_stream->p_bih->biHeight =
 938                             GetDWLE(&st->sh.video.height);
 939                         p_stream->p_bih->biPlanes= 1 ;
 940                         p_stream->p_bih->biSizeImage =
 941                             (p_stream->p_bih->biBitCount >> 3) *
 942                             p_stream->p_bih->biWidth *
 943                             p_stream->p_bih->biHeight;
 944
 945                         msg_Dbg( p_input,
 946                              "fps: %f, width:%i; height:%i, bitcount:%i",
 947                             p_stream->f_rate, p_stream->p_bih->biWidth,
 948                             p_stream->p_bih->biHeight,
 949                             p_stream->p_bih->biBitCount);
 950
 951                         {
 952                             char title[sizeof("Stream") + 10];
 953                             input_info_category_t *p_cat;
 954                             sprintf( title, "Stream %d", p_ogg->i_streams );
 955                             p_cat = input_InfoCategory( p_input, title );
 956                             input_AddInfo( p_cat, _("Type"), _("Video") );
 957                             input_AddInfo( p_cat, _("Codec"), "%.4s",
 958                                            (char *)&p_stream->i_fourcc );
 959                             input_AddInfo( p_cat, _("Frame Rate"), "%f",
 960                                            p_stream->f_rate );
 961                             input_AddInfo( p_cat, _("Bit Count"), "%d",
 962                                            p_stream->p_bih->biBitCount );
 963                             input_AddInfo( p_cat, _("Width"), "%d",
 964                                            p_stream->p_bih->biWidth );
 965                             input_AddInfo( p_cat, _("Height"), "%d",
 966                                            p_stream->p_bih->biHeight );
 967                         }
 968                         p_stream->i_bitrate = 0;
 969                     }
 970                     /* Check for audio header (new format) */
 971                     else if( !strncmp( st->streamtype, "audio", 5 ) )
 972                     {
 973                         char p_buffer[5];
 974
 975                         p_stream->i_cat = AUDIO_ES;
 976
 977                         /* We need to get rid of the header packet */
 978                         ogg_stream_packetout( &p_stream->os, &oggpacket );
 979
 980                         p_stream->p_wf = (WAVEFORMATEX *)
 981                             malloc( sizeof(WAVEFORMATEX) );
 982                         if( !p_stream->p_wf )
 983                         {
 984                             /* Mem allocation error, just ignore the stream */
 985                             free( p_stream );
 986                             p_ogg->i_streams--;
 987                             continue;
 988                         }
 989
 990                         memcpy( p_buffer, st->subtype, 4 );
 991                         p_buffer[4] = '\0';
 992                         p_stream->p_wf->wFormatTag = strtol(p_buffer,NULL,16);
 993                         p_stream->p_wf->nChannels =
 994                             GetWLE(&st->sh.audio.channels);
 995                         p_stream->f_rate = p_stream->p_wf->nSamplesPerSec =
 996                             GetQWLE(&st->samples_per_unit);
 997                         p_stream->i_bitrate = p_stream->p_wf->nAvgBytesPerSec =
 998                             GetDWLE(&st->sh.audio.avgbytespersec);
 999                         p_stream->i_bitrate *= 8;
1000                         p_stream->p_wf->nBlockAlign =
1001                             GetWLE(&st->sh.audio.blockalign);
1002                         p_stream->p_wf->wBitsPerSample =
1003                             GetWLE(&st->bits_per_sample);
1004                         p_stream->p_wf->cbSize = 0;
1005
1006                         switch( p_stream->p_wf->wFormatTag )
1007                         {
1008                         case WAVE_FORMAT_PCM:
1009                             p_stream->i_fourcc =
1010                                 VLC_FOURCC( 'a', 'r', 'a', 'w' );
1011                             break;
1012                         case WAVE_FORMAT_MPEG:
1013                         case WAVE_FORMAT_MPEGLAYER3:
1014                             p_stream->i_fourcc =
1015                                 VLC_FOURCC( 'm', 'p', 'g', 'a' );
1016                             break;
1017                         case WAVE_FORMAT_A52:
1018                             p_stream->i_fourcc =
1019                                 VLC_FOURCC( 'a', '5', '2', ' ' );
1020                             break;
1021                         case WAVE_FORMAT_WMA1:
1022                             p_stream->i_fourcc =
1023                                 VLC_FOURCC( 'w', 'm', 'a', '1' );
1024                             break;
1025                         case WAVE_FORMAT_WMA2:
1026                             p_stream->i_fourcc =
1027                                 VLC_FOURCC( 'w', 'm', 'a', '2' );
1028                             break;
1029                         default:
1030                             p_stream->i_fourcc = VLC_FOURCC( 'm', 's',
1031                                 ( p_stream->p_wf->wFormatTag >> 8 ) & 0xff,
1032                                 p_stream->p_wf->wFormatTag & 0xff );
1033                         }
1034
1035                         msg_Dbg( p_input, "found audio header of type: %.4s",
1036                                  (char *)&p_stream->i_fourcc );
1037                         msg_Dbg( p_input, "audio:0x%4.4x channels:%d %dHz "
1038                                  "%dbits/sample %dkb/s",
1039                                  p_stream->p_wf->wFormatTag,
1040                                  p_stream->p_wf->nChannels,
1041                                  p_stream->p_wf->nSamplesPerSec,
1042                                  p_stream->p_wf->wBitsPerSample,
1043                                  p_stream->p_wf->nAvgBytesPerSec * 8 / 1024 );
1044                         {
1045                             char title[sizeof("Stream") + 10];
1046                             input_info_category_t *p_cat;
1047                             sprintf( title, "Stream %d", p_ogg->i_streams );
1048                             p_cat = input_InfoCategory( p_input, title );
1049                             input_AddInfo( p_cat, _("Type"), _("Audio") );
1050                             input_AddInfo( p_cat, _("Codec"), "%.4s",
1051                                            (char *)&p_stream->i_fourcc );
1052                             input_AddInfo( p_cat, _("Sample Rate"), "%d",
1053                                            p_stream->p_wf->nSamplesPerSec );
1054                             input_AddInfo( p_cat, _("Bit Rate"), "%d",
1055                                            p_stream->p_wf->nAvgBytesPerSec * 8
1056                                               / 1024 );
1057                             input_AddInfo( p_cat, _("Channels"), "%d",
1058                                            p_stream->p_wf->nChannels );
1059                             input_AddInfo( p_cat, _("Bits per Sample"), "%d",
1060                                            p_stream->p_wf->wBitsPerSample );
1061                         }
1062                     }
1063                     /* Check for text (subtitles) header */
1064                     else if( !strncmp(st->streamtype, "text", 4) )
1065                     {
1066                         /* We need to get rid of the header packet */
1067                         ogg_stream_packetout( &p_stream->os, &oggpacket );
1068
1069                         msg_Dbg( p_input, "found text subtitles header" );
1070                         p_stream->i_cat = SPU_ES;
1071                         p_stream->i_fourcc =
1072                             VLC_FOURCC( 's', 'u', 'b', 't' );
1073                         p_stream->f_rate = 1000; /* granulepos is in milisec */
1074                     }
1075                     else
1076                     {
1077                         msg_Dbg( p_input, "stream %d has a header marker "
1078                             "but is of an unknown type", p_ogg->i_streams-1 );
1079                         free( p_stream );
1080                         p_ogg->i_streams--;
1081                     }
1082                 }
1083                 else
1084                 {
1085                     msg_Dbg( p_input, "stream %d is of unknown type",
1086                              p_ogg->i_streams-1 );
1087                     free( p_stream );
1088                     p_ogg->i_streams--;
1089                 }
1090
1091 #undef p_stream
1092
1093                 if( Ogg_ReadPage( p_input, p_ogg, &oggpage ) != VLC_SUCCESS )
1094                     return VLC_EGENERIC;
1095             }
1096
1097             /* This is the first data page, which means we are now finished
1098              * with the initial pages. We just need to store it in the relevant
1099              * bitstream. */
1100             for( i_stream = 0; i_stream < p_ogg->i_streams; i_stream++ )
1101             {
1102                 if( ogg_stream_pagein( &p_ogg->pp_stream[i_stream]->os,
1103                                        &oggpage ) == 0 )
1104                 {
1105                     break;
1106                 }
1107             }
1108             return VLC_SUCCESS;
1109         }
1110     }
1111     return VLC_EGENERIC;
1112 }
1113
1114 /*****************************************************************************
1115  * Activate: initializes ogg demux structures
1116  *****************************************************************************/
1117 static int Activate( vlc_object_t * p_this )
1118 {
1119     int i_stream, b_forced;
1120     demux_sys_t    *p_ogg;
1121     input_thread_t *p_input = (input_thread_t *)p_this;
1122
1123     p_input->p_demux_data = NULL;
1124     b_forced = ( ( *p_input->psz_demux )&&
1125                  ( !strncmp( p_input->psz_demux, "ogg", 10 ) ) ) ? 1 : 0;
1126
1127     /* Check if we are dealing with an ogg stream */
1128     if( !b_forced && ( Ogg_Check( p_input ) != VLC_SUCCESS ) )
1129         return -1;
1130
1131     /* Allocate p_ogg */
1132     if( !( p_ogg = malloc( sizeof( demux_sys_t ) ) ) )
1133     {
1134         msg_Err( p_input, "out of memory" );
1135         goto error;
1136     }
1137     memset( p_ogg, 0, sizeof( demux_sys_t ) );
1138     p_input->p_demux_data = p_ogg;
1139
1140     p_ogg->b_seekable = ( ( p_input->stream.b_seekable )
1141                         &&( p_input->stream.i_method == INPUT_METHOD_FILE ) );
1142
1143     /* Initialize the Ogg physical bitstream parser */
1144     ogg_sync_init( &p_ogg->oy );
1145
1146     /* Find the logical streams embedded in the physical stream and
1147      * initialize our p_ogg structure. */
1148     if( Ogg_FindLogicalStreams( p_input, p_ogg ) != VLC_SUCCESS )
1149     {
1150         msg_Err( p_input, "couldn't find an ogg logical stream" );
1151         goto error;
1152     }
1153
1154     /* Set exported function */
1155     p_input->pf_demux = Demux;
1156
1157     /* Initialize access plug-in structures. */
1158     if( p_input->i_mtu == 0 )
1159     {
1160         /* Improve speed. */
1161         p_input->i_bufsize = INPUT_DEFAULT_BUFSIZE;
1162     }
1163
1164     /* Create one program */
1165     vlc_mutex_lock( &p_input->stream.stream_lock );
1166     if( input_InitStream( p_input, 0 ) == -1)
1167     {
1168         vlc_mutex_unlock( &p_input->stream.stream_lock );
1169         msg_Err( p_input, "cannot init stream" );
1170         goto error;
1171     }
1172     if( input_AddProgram( p_input, 0, 0) == NULL )
1173     {
1174         vlc_mutex_unlock( &p_input->stream.stream_lock );
1175         msg_Err( p_input, "cannot add program" );
1176         goto error;
1177     }
1178     p_input->stream.p_selected_program = p_input->stream.pp_programs[0];
1179     p_input->stream.i_mux_rate = 0;
1180     vlc_mutex_unlock( &p_input->stream.stream_lock );
1181
1182     for( i_stream = 0 ; i_stream < p_ogg->i_streams; i_stream++ )
1183     {
1184 #define p_stream p_ogg->pp_stream[i_stream]
1185         vlc_mutex_lock( &p_input->stream.stream_lock );
1186         p_stream->p_es = input_AddES( p_input,
1187                                       p_input->stream.p_selected_program,
1188                                       i_stream,
1189                                       p_stream->i_cat, NULL, 0 );
1190         p_input->stream.i_mux_rate += (p_stream->i_bitrate / ( 8 * 50 ));
1191         vlc_mutex_unlock( &p_input->stream.stream_lock );
1192         p_stream->p_es->i_stream_id = i_stream;
1193         p_stream->p_es->i_fourcc = p_stream->i_fourcc;
1194         p_stream->p_es->p_waveformatex      = (void*)p_stream->p_wf;
1195         p_stream->p_es->p_bitmapinfoheader  = (void*)p_stream->p_bih;
1196
1197         p_stream->i_pcr  = p_stream->i_previous_pcr = -1;
1198 #undef p_stream
1199     }
1200
1201     for( i_stream = 0; i_stream < p_ogg->i_streams; i_stream++ )
1202     {
1203 #define p_stream  p_ogg->pp_stream[i_stream]
1204         switch( p_stream->p_es->i_cat )
1205         {
1206             case( VIDEO_ES ):
1207                 if( (p_ogg->p_stream_video == NULL) )
1208                 {
1209                     p_ogg->p_stream_video = p_stream;
1210                     /* TODO add test to see if a decoder has been found */
1211                     Ogg_StreamStart( p_input, p_ogg, i_stream );
1212                 }
1213                 break;
1214
1215             case( AUDIO_ES ):
1216                 if( (p_ogg->p_stream_audio == NULL) )
1217                 {
1218                     int i_audio = config_GetInt( p_input, "audio-channel" );
1219                     if( i_audio == i_stream || i_audio <= 0 ||
1220                         i_audio >= p_ogg->i_streams ||
1221                         p_ogg->pp_stream[i_audio]->p_es->i_cat != AUDIO_ES )
1222                     {
1223                         p_ogg->p_stream_audio = p_stream;
1224                         Ogg_StreamStart( p_input, p_ogg, i_stream );
1225                     }
1226                 }
1227                 break;
1228
1229             case( SPU_ES ):
1230                 if( (p_ogg->p_stream_spu == NULL) )
1231                 {
1232                     /* for spu, default is none */
1233                     int i_spu = config_GetInt( p_input, "spu-channel" );
1234                     if( i_spu < 0 || i_spu >= p_ogg->i_streams ||
1235                         p_ogg->pp_stream[i_spu]->p_es->i_cat != SPU_ES )
1236                     {
1237                         break;
1238                     }
1239                     else if( i_spu == i_stream )
1240                     {
1241                         p_ogg->p_stream_spu = p_stream;
1242                         Ogg_StreamStart( p_input, p_ogg, i_stream );
1243                     }
1244                 }
1245                 break;
1246
1247             default:
1248                 break;
1249         }
1250 #undef p_stream
1251     }
1252
1253     /* we select the first audio and video ES */
1254     vlc_mutex_lock( &p_input->stream.stream_lock );
1255     if( !p_ogg->p_stream_video )
1256     {
1257         msg_Warn( p_input, "no video stream found" );
1258     }
1259     if( !p_ogg->p_stream_audio )
1260     {
1261         msg_Warn( p_input, "no audio stream found!" );
1262     }
1263     p_input->stream.p_selected_program->b_is_ok = 1;
1264     vlc_mutex_unlock( &p_input->stream.stream_lock );
1265
1266     return 0;
1267
1268  error:
1269     Deactivate( (vlc_object_t *)p_input );
1270     return -1;
1271
1272 }
1273
1274 /*****************************************************************************
1275  * Deactivate: frees unused data
1276  *****************************************************************************/
1277 static void Deactivate( vlc_object_t *p_this )
1278 {
1279     input_thread_t *p_input = (input_thread_t *)p_this;
1280     demux_sys_t *p_ogg = (demux_sys_t *)p_input->p_demux_data  ;
1281     int i, j;
1282
1283     if( p_ogg )
1284     {
1285         /* Cleanup the bitstream parser */
1286         ogg_sync_clear( &p_ogg->oy );
1287
1288         for( i = 0; i < p_ogg->i_streams; i++ )
1289         {
1290             ogg_stream_clear( &p_ogg->pp_stream[i]->os );
1291             for( j = 0; j < p_ogg->pp_stream[i]->i_packets_backup; j++ )
1292             {
1293                 free( p_ogg->pp_stream[i]->p_packets_backup[j].packet );
1294             }
1295             if( p_ogg->pp_stream[i]->p_packets_backup)
1296                 free( p_ogg->pp_stream[i]->p_packets_backup );
1297 #if 0 /* hmmm, it's already freed in input_DelES() */
1298             if( p_ogg->pp_stream[i]->p_bih )
1299                 free( p_ogg->pp_stream[i]->p_bih );
1300             if( p_ogg->pp_stream[i]->p_wf )
1301                 free( p_ogg->pp_stream[i]->p_wf );
1302 #endif
1303             free( p_ogg->pp_stream[i] );
1304         }
1305         if( p_ogg->pp_stream ) free( p_ogg->pp_stream );
1306
1307         free( p_ogg );
1308     }
1309 }
1310
1311 /*****************************************************************************
1312  * Demux: reads and demuxes data packets
1313  *****************************************************************************
1314  * Returns -1 in case of error, 0 in case of EOF, 1 otherwise
1315  *****************************************************************************/
1316 static int Demux( input_thread_t * p_input )
1317 {
1318     int i, i_stream, b_pcr = 0, b_eos = 0;
1319     ogg_page    oggpage;
1320     ogg_packet  oggpacket;
1321     demux_sys_t *p_ogg  = (demux_sys_t *)p_input->p_demux_data;
1322
1323 #define p_stream p_ogg->pp_stream[i_stream]
1324     /* detect new selected/unselected streams */
1325     for( i_stream = 0; i_stream < p_ogg->i_streams; i_stream++ )
1326     {
1327         if( p_stream->p_es )
1328         {
1329             if( p_stream->p_es->p_decoder_fifo &&
1330                 !p_stream->i_activated )
1331             {
1332                 Ogg_StreamStart( p_input, p_ogg, i_stream );
1333             }
1334             else
1335             if( !p_stream->p_es->p_decoder_fifo &&
1336                 p_stream->i_activated )
1337             {
1338                 Ogg_StreamStop( p_input, p_ogg, i_stream );
1339             }
1340         }
1341     }
1342
1343     /* search for new video and audio stream to select
1344      * if current have been unselected */
1345     if( ( !p_ogg->p_stream_video )
1346             || ( !p_ogg->p_stream_video->p_es->p_decoder_fifo ) )
1347     {
1348         p_ogg->p_stream_video = NULL;
1349         for( i_stream = 0; i_stream < p_ogg->i_streams; i_stream++ )
1350         {
1351             if( ( p_stream->i_cat == VIDEO_ES )
1352                   &&( p_stream->p_es->p_decoder_fifo ) )
1353             {
1354                 p_ogg->p_stream_video = p_stream;
1355                 break;
1356             }
1357         }
1358     }
1359     if( ( !p_ogg->p_stream_audio )
1360             ||( !p_ogg->p_stream_audio->p_es->p_decoder_fifo ) )
1361     {
1362         p_ogg->p_stream_audio = NULL;
1363         for( i_stream = 0; i_stream < p_ogg->i_streams; i_stream++ )
1364         {
1365             if( ( p_stream->i_cat == AUDIO_ES )
1366                   &&( p_stream->p_es->p_decoder_fifo ) )
1367             {
1368                 p_ogg->p_stream_audio = p_stream;
1369                 break;
1370             }
1371         }
1372     }
1373
1374     if( p_input->stream.p_selected_program->i_synchro_state == SYNCHRO_REINIT )
1375     {
1376         msg_Warn( p_input, "synchro reinit" );
1377
1378         for( i_stream = 0; i_stream < p_ogg->i_streams; i_stream++ )
1379         {
1380             /* we'll trash all the data until we find the next pcr */
1381             p_stream->b_reinit = 1;
1382             p_stream->i_pcr = -1;
1383             p_stream->i_interpolated_pcr = -1;
1384         }
1385         p_ogg->b_reinit = 1;
1386     }
1387
1388
1389     /*
1390      * Demux ogg pages from the stream
1391      */
1392     for( i = 0; i < PAGES_READ_ONCE || p_ogg->b_reinit;  i++ )
1393     {
1394         if( Ogg_ReadPage( p_input, p_ogg, &oggpage ) != VLC_SUCCESS )
1395         {
1396             b_eos = 1;
1397             break;
1398         }
1399
1400         for( i_stream = 0; i_stream < p_ogg->i_streams; i_stream++ )
1401         {
1402             if( ogg_stream_pagein( &p_stream->os, &oggpage ) != 0 )
1403                 continue;
1404
1405             while( ogg_stream_packetout( &p_stream->os, &oggpacket ) > 0 )
1406             {
1407                 if( !p_stream->p_es )
1408                 {
1409                     break;
1410                 }
1411
1412                 if( p_stream->b_reinit )
1413                 {
1414                     /* Convert the granulepos into a pcr */
1415                     Ogg_UpdatePCR( p_stream, &oggpacket );
1416
1417                     if( p_stream->i_pcr >= 0 )
1418                     {
1419                         p_stream->b_reinit = 0;
1420                     }
1421                     else continue;
1422
1423                     /* An Ogg/vorbis packet contains an end date granulepos */
1424                     if( p_stream->i_fourcc == VLC_FOURCC( 'v','o','r','b' ) )
1425                         continue;
1426                 }
1427
1428                 p_ogg->b_reinit = 0;
1429                 Ogg_DecodePacket( p_input, p_stream, &oggpacket );
1430
1431             }
1432         }
1433     }
1434
1435     i_stream = 0;
1436     p_ogg->i_pcr = p_stream->i_interpolated_pcr;
1437     for( ; i_stream < p_ogg->i_streams; i_stream++ )
1438     {
1439         if( p_stream->i_cat == SPU_ES )
1440             continue;
1441
1442         if( p_stream->i_interpolated_pcr > 0
1443             && p_stream->i_interpolated_pcr < p_ogg->i_pcr )
1444             p_ogg->i_pcr = p_stream->i_interpolated_pcr;
1445
1446         if( p_stream->i_pcr >= 0 ) b_pcr = VLC_TRUE;
1447     }
1448
1449     if( b_pcr )
1450     {
1451         input_ClockManageRef( p_input, p_input->stream.p_selected_program,
1452                               p_ogg->i_pcr );
1453     }
1454
1455 #undef p_stream
1456
1457     /* Did we reach the end of stream ? */
1458     return( b_eos ? 0 : 1 );
1459 }