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 1.37 2003/09/28 16:50:04 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_fourcc != VLC_FOURCC( 'v','o','r','b' ) &&
 485         p_stream->i_fourcc != VLC_FOURCC( 't','a','r','k' ) &&
 486         p_stream->i_fourcc != VLC_FOURCC( 't','h','e','o' ) )
 487     {
 488         /* Remove the header from the packet */
 489         i_header_len = (*p_oggpacket->packet & PACKET_LEN_BITS01) >> 6;
 490         i_header_len |= (*p_oggpacket->packet & PACKET_LEN_BITS2) << 1;
 491         i_header_len++;
 492
 493         p_pes->i_pes_size -= i_header_len;
 494     }
 495
 496     if( p_stream->i_fourcc == VLC_FOURCC( 't','a','r','k' ) )
 497     {
 498         /* FIXME: the biggest hack I've ever done */
 499         msg_Warn( p_input, "tark pts: "I64Fd", granule: "I64Fd,
 500                   p_pes->i_pts, p_pes->i_dts );
 501         msleep(10000);
 502     }
 503
 504     memcpy( p_data->p_payload_start,
 505             p_oggpacket->packet + i_header_len,
 506             p_oggpacket->bytes - i_header_len );
 507
 508     p_data->p_payload_end = p_data->p_payload_start + p_pes->i_pes_size;
 509     p_data->b_discard_payload = 0;
 510
 511     input_DecodePES( p_stream->p_es->p_decoder_fifo, p_pes );
 512 }
 513
 514 /****************************************************************************
 515  * Ogg_FindLogicalStreams: Find the logical streams embedded in the physical
 516  *                         stream and fill p_ogg.
 517  *****************************************************************************
 518  * The initial page of a logical stream is marked as a 'bos' page.
 519  * Furthermore, the Ogg specification mandates that grouped bitstreams begin
 520  * together and all of the initial pages must appear before any data pages.
 521  *
 522  * On success this function returns VLC_SUCCESS.
 523  ****************************************************************************/
 524 static int Ogg_FindLogicalStreams( input_thread_t *p_input, demux_sys_t *p_ogg)
 525 {
 526     ogg_packet oggpacket;
 527     ogg_page oggpage;
 528     int i_stream;
 529
 530     while( Ogg_ReadPage( p_input, p_ogg, &oggpage ) == VLC_SUCCESS )
 531     {
 532         if( ogg_page_bos( &oggpage ) )
 533         {
 534
 535             /* All is wonderful in our fine fine little world.
 536              * We found the beginning of our first logical stream. */
 537             while( ogg_page_bos( &oggpage ) )
 538             {
 539                 p_ogg->i_streams++;
 540                 p_ogg->pp_stream =
 541                     realloc( p_ogg->pp_stream, p_ogg->i_streams *
 542                              sizeof(logical_stream_t *) );
 543
 544 #define p_stream p_ogg->pp_stream[p_ogg->i_streams - 1]
 545
 546                 p_stream = malloc( sizeof(logical_stream_t) );
 547                 memset( p_stream, 0, sizeof(logical_stream_t) );
 548
 549                 /* Setup the logical stream */
 550                 p_stream->i_serial_no = ogg_page_serialno( &oggpage );
 551                 ogg_stream_init( &p_stream->os, p_stream->i_serial_no );
 552
 553                 /* Extract the initial header from the first page and verify
 554                  * the codec type of tis Ogg bitstream */
 555                 if( ogg_stream_pagein( &p_stream->os, &oggpage ) < 0 )
 556                 {
 557                     /* error. stream version mismatch perhaps */
 558                     msg_Err( p_input, "Error reading first page of "
 559                              "Ogg bitstream data" );
 560                     return VLC_EGENERIC;
 561                 }
 562
 563                 /* FIXME: check return value */
 564                 ogg_stream_packetpeek( &p_stream->os, &oggpacket );
 565
 566                 /* Check for Vorbis header */
 567                 if( oggpacket.bytes >= 7 &&
 568                     ! strncmp( &oggpacket.packet[1], "vorbis", 6 ) )
 569                 {
 570                     oggpack_buffer opb;
 571
 572                     msg_Dbg( p_input, "found vorbis header" );
 573                     p_stream->i_cat = AUDIO_ES;
 574                     p_stream->i_fourcc = VLC_FOURCC( 'v','o','r','b' );
 575
 576                     /* Signal that we want to keep a backup of the vorbis
 577                      * stream headers. They will be used when switching between
 578                      * audio streams. */
 579                     p_stream->b_force_backup = 1;
 580
 581                     /* Cheat and get additionnal info ;) */
 582                     oggpack_readinit( &opb, oggpacket.packet, oggpacket.bytes);
 583                     oggpack_adv( &opb, 88 );
 584                     p_stream->i_channels = oggpack_read( &opb, 8 );
 585                     p_stream->f_rate = oggpack_read( &opb, 32 );
 586                     oggpack_adv( &opb, 32 );
 587                     p_stream->i_bitrate = oggpack_read( &opb, 32 );
 588                     {
 589                         char title[sizeof("Stream") + 10];
 590                         input_info_category_t *p_cat;
 591                         sprintf( title, "Stream %d", p_ogg->i_streams );
 592                         p_cat = input_InfoCategory( p_input, title );
 593                         input_AddInfo( p_cat, _("Type"), _("Audio") );
 594                         input_AddInfo( p_cat, _("Codec"), _("Vorbis") );
 595                         input_AddInfo( p_cat, _("Sample Rate"), "%f",
 596                                        p_stream->f_rate );
 597                         input_AddInfo( p_cat, _("Channels"), "%d",
 598                                        p_stream->i_channels );
 599                         input_AddInfo( p_cat, _("Bit Rate"), "%d",
 600                                        p_stream->i_bitrate );
 601                     }
 602                 }
 603                 /* Check for Theora header */
 604                 else if( oggpacket.bytes >= 7 &&
 605                          ! strncmp( &oggpacket.packet[1], "theora", 6 ) )
 606                 {
 607 #ifdef HAVE_OGGPACKB
 608                     oggpack_buffer opb;
 609                     int i_fps_numerator;
 610                     int i_fps_denominator;
 611                     int i_keyframe_frequency_force;
 612 #endif
 613
 614                     msg_Dbg( p_input, "found theora header" );
 615 #ifdef HAVE_OGGPACKB
 616                     p_stream->i_cat = VIDEO_ES;
 617                     p_stream->i_fourcc = VLC_FOURCC( 't','h','e','o' );
 618
 619                     /* Signal that we want to keep a backup of the vorbis
 620                      * stream headers. They will be used when switching between
 621                      * audio streams. */
 622                     p_stream->b_force_backup = 1;
 623
 624                     /* Cheat and get additionnal info ;) */
 625                     oggpackB_readinit(&opb, oggpacket.packet, oggpacket.bytes);
 626                     oggpackB_adv( &opb, 56 );
 627                     oggpackB_read( &opb, 8 ); /* major version num */
 628                     oggpackB_read( &opb, 8 ); /* minor version num */
 629                     oggpackB_read( &opb, 8 ); /* subminor version num */
 630                     oggpackB_read( &opb, 16 ) /*<< 4*/; /* width */
 631                     oggpackB_read( &opb, 16 ) /*<< 4*/; /* height */
 632                     oggpackB_read( &opb, 24 ); /* frame width */
 633                     oggpackB_read( &opb, 24 ); /* frame height */
 634                     oggpackB_read( &opb, 8 ); /* x offset */
 635                     oggpackB_read( &opb, 8 ); /* y offset */
 636
 637                     i_fps_numerator = oggpackB_read( &opb, 32 );
 638                     i_fps_denominator = oggpackB_read( &opb, 32 );
 639                     oggpackB_read( &opb, 24 ); /* aspect_numerator */
 640                     oggpackB_read( &opb, 24 ); /* aspect_denominator */
 641                     i_keyframe_frequency_force = 1 << oggpackB_read( &opb, 5 );
 642                     oggpackB_read( &opb, 8 ); /* colorspace */
 643                     p_stream->i_bitrate = oggpackB_read( &opb, 24 );
 644                     oggpackB_read( &opb, 6 ); /* quality */
 645
 646                     /* granule_shift = i_log( frequency_force -1 ) */
 647                     p_stream->i_theora_keyframe_granule_shift = 0;
 648                     i_keyframe_frequency_force--;
 649                     while( i_keyframe_frequency_force )
 650                     {
 651                         p_stream->i_theora_keyframe_granule_shift++;
 652                         i_keyframe_frequency_force >>= 1;
 653                     }
 654
 655                     p_stream->f_rate = ((float)i_fps_numerator) /
 656                                                 i_fps_denominator;
 657                     msg_Dbg( p_input,
 658                              "found theora header, bitrate: %i, rate: %f",
 659                              p_stream->i_bitrate, p_stream->f_rate );
 660                     {
 661                         char title[sizeof("Stream") + 10];
 662                         input_info_category_t *p_cat;
 663                         sprintf( title, "Stream %d", p_ogg->i_streams );
 664                         p_cat = input_InfoCategory( p_input, title );
 665                         input_AddInfo( p_cat, _("Type"), _("Video") );
 666                         input_AddInfo( p_cat, _("Codec"), _("Theora") );
 667                         input_AddInfo( p_cat, _("Frame Rate"), "%f",
 668                                        p_stream->f_rate );
 669                         input_AddInfo( p_cat, _("Bit Rate"), "%d",
 670                                        p_stream->i_bitrate );
 671                     }
 672 #else /* HAVE_OGGPACKB */
 673                     msg_Dbg( p_input, "the ogg demuxer has been compiled "
 674                              "without support for the oggpackB extension."
 675                              "The theora stream won't be decoded." );
 676                     free( p_stream );
 677                     p_ogg->i_streams--;
 678                     continue;
 679 #endif /* HAVE_OGGPACKB */
 680                 }
 681                 /* Check for Tarkin header */
 682                 else if( oggpacket.bytes >= 7 &&
 683                          ! strncmp( &oggpacket.packet[1], "tarkin", 6 ) )
 684                 {
 685                     oggpack_buffer opb;
 686
 687                     msg_Dbg( p_input, "found tarkin header" );
 688                     p_stream->i_cat = VIDEO_ES;
 689                     p_stream->i_fourcc = VLC_FOURCC( 't','a','r','k' );
 690
 691                     /* Cheat and get additionnal info ;) */
 692                     oggpack_readinit( &opb, oggpacket.packet, oggpacket.bytes);
 693                     oggpack_adv( &opb, 88 );
 694                     oggpack_adv( &opb, 104 );
 695                     p_stream->i_bitrate = oggpack_read( &opb, 32 );
 696                     p_stream->f_rate = 2; /* FIXME */
 697                     msg_Dbg( p_input,
 698                              "found tarkin header, bitrate: %i, rate: %f",
 699                              p_stream->i_bitrate, p_stream->f_rate );
 700                                         {
 701                         char title[sizeof("Stream") + 10];
 702                         input_info_category_t *p_cat;
 703                         sprintf( title, "Stream %d", p_ogg->i_streams );
 704                         p_cat = input_InfoCategory( p_input, title );
 705                         input_AddInfo( p_cat, _("Type"), _("Video") );
 706                         input_AddInfo( p_cat, _("Codec"), _("tarkin") );
 707                         input_AddInfo( p_cat, _("Sample Rate"), "%f",
 708                                        p_stream->f_rate );
 709                         input_AddInfo( p_cat, _("Bit Rate"), "%d",
 710                                        p_stream->i_bitrate );
 711                     }
 712
 713                 }
 714                 else if( oggpacket.bytes >= 142 &&
 715                          !strncmp( &oggpacket.packet[1],
 716                                    "Direct Show Samples embedded in Ogg", 35 ))
 717                 {
 718                     /* Old header type */
 719
 720                     /* Check for video header (old format) */
 721                     if( GetDWLE((oggpacket.packet+96)) == 0x05589f80 &&
 722                         oggpacket.bytes >= 184 )
 723                     {
 724                         p_stream->i_cat = VIDEO_ES;
 725
 726                         p_stream->p_bih = (BITMAPINFOHEADER *)
 727                             malloc( sizeof(BITMAPINFOHEADER) );
 728                         if( !p_stream->p_bih )
 729                         {
 730                             /* Mem allocation error, just ignore the stream */
 731                             free( p_stream );
 732                             p_ogg->i_streams--;
 733                             continue;
 734                         }
 735                         p_stream->p_bih->biSize = sizeof(BITMAPINFOHEADER);
 736                         p_stream->p_bih->biCompression= p_stream->i_fourcc =
 737                             VLC_FOURCC( oggpacket.packet[68],
 738                                         oggpacket.packet[69],
 739                                         oggpacket.packet[70],
 740                                         oggpacket.packet[71] );
 741                         msg_Dbg( p_input, "found video header of type: %.4s",
 742                                  (char *)&p_stream->i_fourcc );
 743
 744                         p_stream->f_rate = 10000000.0 /
 745                             GetQWLE((oggpacket.packet+164));
 746                         p_stream->p_bih->biBitCount =
 747                             GetWLE((oggpacket.packet+182));
 748                         if( !p_stream->p_bih->biBitCount )
 749                             p_stream->p_bih->biBitCount=24; // hack, FIXME
 750                         p_stream->p_bih->biWidth =
 751                             GetDWLE((oggpacket.packet+176));
 752                         p_stream->p_bih->biHeight =
 753                             GetDWLE((oggpacket.packet+180));
 754                         p_stream->p_bih->biPlanes= 1 ;
 755                         p_stream->p_bih->biSizeImage =
 756                             (p_stream->p_bih->biBitCount >> 3) *
 757                             p_stream->p_bih->biWidth *
 758                             p_stream->p_bih->biHeight;
 759
 760                         msg_Dbg( p_input,
 761                              "fps: %f, width:%i; height:%i, bitcount:%i",
 762                             p_stream->f_rate, p_stream->p_bih->biWidth,
 763                             p_stream->p_bih->biHeight,
 764                             p_stream->p_bih->biBitCount);
 765                         {
 766                             char title[sizeof("Stream") + 10];
 767                             input_info_category_t *p_cat;
 768                             sprintf( title, "Stream %d", p_ogg->i_streams );
 769                             p_cat = input_InfoCategory( p_input, title );
 770                             input_AddInfo( p_cat, _("Type"), _("Video") );
 771                             input_AddInfo( p_cat, _("Codec"), "%.4s",
 772                                            (char *)&p_stream->i_fourcc );
 773                             input_AddInfo( p_cat, _("Frame Rate"), "%f",
 774                                            p_stream->f_rate );
 775                             input_AddInfo( p_cat, _("Bit Count"), "%d",
 776                                            p_stream->p_bih->biBitCount );
 777                             input_AddInfo( p_cat, _("Width"), "%d",
 778                                            p_stream->p_bih->biWidth );
 779                             input_AddInfo( p_cat, _("Height"), "%d",
 780                                            p_stream->p_bih->biHeight );
 781                         }
 782                         p_stream->i_bitrate = 0;
 783                     }
 784                     /* Check for audio header (old format) */
 785                     else if( GetDWLE((oggpacket.packet+96)) == 0x05589F81 )
 786                     {
 787                         unsigned int i_extra_size;
 788
 789                         p_stream->i_cat = AUDIO_ES;
 790
 791                         i_extra_size = GetWLE((oggpacket.packet+140));
 792
 793                         p_stream->p_wf = (WAVEFORMATEX *)
 794                             malloc( sizeof(WAVEFORMATEX) + i_extra_size );
 795                         if( !p_stream->p_wf )
 796                         {
 797                             /* Mem allocation error, just ignore the stream */
 798                             free( p_stream );
 799                             p_ogg->i_streams--;
 800                             continue;
 801                         }
 802
 803                         p_stream->p_wf->wFormatTag =
 804                             GetWLE((oggpacket.packet+124));
 805                         p_stream->p_wf->nChannels =
 806                             GetWLE((oggpacket.packet+126));
 807                         p_stream->f_rate = p_stream->p_wf->nSamplesPerSec =
 808                             GetDWLE((oggpacket.packet+128));
 809                         p_stream->i_bitrate = p_stream->p_wf->nAvgBytesPerSec =
 810                             GetDWLE((oggpacket.packet+132));
 811                         p_stream->i_bitrate *= 8;
 812                         p_stream->p_wf->nBlockAlign =
 813                             GetWLE((oggpacket.packet+136));
 814                         p_stream->p_wf->wBitsPerSample =
 815                             GetWLE((oggpacket.packet+138));
 816                         p_stream->p_wf->cbSize = i_extra_size;
 817
 818                         if( i_extra_size > 0 )
 819                             memcpy( p_stream->p_wf+sizeof(WAVEFORMATEX),
 820                                     oggpacket.packet+142, i_extra_size );
 821
 822                         switch( p_stream->p_wf->wFormatTag )
 823                         {
 824                         case WAVE_FORMAT_PCM:
 825                             p_stream->i_fourcc =
 826                                 VLC_FOURCC( 'a', 'r', 'a', 'w' );
 827                             break;
 828                         case WAVE_FORMAT_MPEG:
 829                         case WAVE_FORMAT_MPEGLAYER3:
 830                             p_stream->i_fourcc =
 831                                 VLC_FOURCC( 'm', 'p', 'g', 'a' );
 832                             break;
 833                         case WAVE_FORMAT_A52:
 834                             p_stream->i_fourcc =
 835                                 VLC_FOURCC( 'a', '5', '2', ' ' );
 836                             break;
 837                         case WAVE_FORMAT_WMA1:
 838                             p_stream->i_fourcc =
 839                                 VLC_FOURCC( 'w', 'm', 'a', '1' );
 840                             break;
 841                         case WAVE_FORMAT_WMA2:
 842                             p_stream->i_fourcc =
 843                                 VLC_FOURCC( 'w', 'm', 'a', '2' );
 844                             break;
 845                         default:
 846                             p_stream->i_fourcc = VLC_FOURCC( 'm', 's',
 847                                 ( p_stream->p_wf->wFormatTag >> 8 ) & 0xff,
 848                                 p_stream->p_wf->wFormatTag & 0xff );
 849                         }
 850
 851                         msg_Dbg( p_input, "found audio header of type: %.4s",
 852                                  (char *)&p_stream->i_fourcc );
 853                         msg_Dbg( p_input, "audio:0x%4.4x channels:%d %dHz "
 854                                  "%dbits/sample %dkb/s",
 855                                  p_stream->p_wf->wFormatTag,
 856                                  p_stream->p_wf->nChannels,
 857                                  p_stream->p_wf->nSamplesPerSec,
 858                                  p_stream->p_wf->wBitsPerSample,
 859                                  p_stream->p_wf->nAvgBytesPerSec * 8 / 1024 );
 860                         {
 861                             char title[sizeof("Stream") + 10];
 862                             input_info_category_t *p_cat;
 863                             sprintf( title, "Stream %d", p_ogg->i_streams );
 864                             p_cat = input_InfoCategory( p_input, title );
 865                             input_AddInfo( p_cat, _("Type"), _("Audio") );
 866                             input_AddInfo( p_cat, _("Codec"), "%.4s",
 867                                            (char *)&p_stream->i_fourcc );
 868                             input_AddInfo( p_cat, _("Sample Rate"), "%d",
 869                                            p_stream->p_wf->nSamplesPerSec );
 870                             input_AddInfo( p_cat, _("Bit Rate"), "%d",
 871                                            p_stream->p_wf->nAvgBytesPerSec * 8
 872                                               / 1024 );
 873                             input_AddInfo( p_cat, _("Channels"), "%d",
 874                                            p_stream->p_wf->nChannels );
 875                             input_AddInfo( p_cat, _("Bits per Sample"), "%d",
 876                                            p_stream->p_wf->wBitsPerSample );
 877                         }
 878
 879                     }
 880                     else
 881                     {
 882                         msg_Dbg( p_input, "stream %d has an old header "
 883                             "but is of an unknown type", p_ogg->i_streams-1 );
 884                         free( p_stream );
 885                         p_ogg->i_streams--;
 886                     }
 887                 }
 888                 else if( (*oggpacket.packet & PACKET_TYPE_BITS )
 889                          == PACKET_TYPE_HEADER &&
 890                          oggpacket.bytes >= (int)sizeof(stream_header)+1 )
 891                 {
 892                     stream_header *st = (stream_header *)(oggpacket.packet+1);
 893
 894                     /* Check for video header (new format) */
 895                     if( !strncmp( st->streamtype, "video", 5 ) )
 896                     {
 897                         p_stream->i_cat = VIDEO_ES;
 898
 899                         /* We need to get rid of the header packet */
 900                         ogg_stream_packetout( &p_stream->os, &oggpacket );
 901
 902                         p_stream->p_bih = (BITMAPINFOHEADER *)
 903                             malloc( sizeof(BITMAPINFOHEADER) );
 904                         if( !p_stream->p_bih )
 905                         {
 906                             /* Mem allocation error, just ignore the stream */
 907                             free( p_stream );
 908                             p_ogg->i_streams--;
 909                             continue;
 910                         }
 911                         p_stream->p_bih->biSize = sizeof(BITMAPINFOHEADER);
 912                         p_stream->p_bih->biCompression=
 913                             p_stream->i_fourcc = VLC_FOURCC( st->subtype[0],
 914                                                              st->subtype[1],
 915                                                              st->subtype[2],
 916                                                              st->subtype[3] );
 917                         msg_Dbg( p_input, "found video header of type: %.4s",
 918                                  (char *)&p_stream->i_fourcc );
 919
 920                         p_stream->f_rate = 10000000.0 /
 921                             GetQWLE(&st->time_unit);
 922                         p_stream->p_bih->biBitCount =
 923                             GetWLE(&st->bits_per_sample);
 924                         p_stream->p_bih->biWidth =
 925                             GetDWLE(&st->sh.video.width);
 926                         p_stream->p_bih->biHeight =
 927                             GetDWLE(&st->sh.video.height);
 928                         p_stream->p_bih->biPlanes= 1 ;
 929                         p_stream->p_bih->biSizeImage =
 930                             (p_stream->p_bih->biBitCount >> 3) *
 931                             p_stream->p_bih->biWidth *
 932                             p_stream->p_bih->biHeight;
 933
 934                         msg_Dbg( p_input,
 935                              "fps: %f, width:%i; height:%i, bitcount:%i",
 936                             p_stream->f_rate, p_stream->p_bih->biWidth,
 937                             p_stream->p_bih->biHeight,
 938                             p_stream->p_bih->biBitCount);
 939
 940                         {
 941                             char title[sizeof("Stream") + 10];
 942                             input_info_category_t *p_cat;
 943                             sprintf( title, "Stream %d", p_ogg->i_streams );
 944                             p_cat = input_InfoCategory( p_input, title );
 945                             input_AddInfo( p_cat, _("Type"), _("Video") );
 946                             input_AddInfo( p_cat, _("Codec"), "%.4s",
 947                                            (char *)&p_stream->i_fourcc );
 948                             input_AddInfo( p_cat, _("Frame Rate"), "%f",
 949                                            p_stream->f_rate );
 950                             input_AddInfo( p_cat, _("Bit Count"), "%d",
 951                                            p_stream->p_bih->biBitCount );
 952                             input_AddInfo( p_cat, _("Width"), "%d",
 953                                            p_stream->p_bih->biWidth );
 954                             input_AddInfo( p_cat, _("Height"), "%d",
 955                                            p_stream->p_bih->biHeight );
 956                         }
 957                         p_stream->i_bitrate = 0;
 958                     }
 959                     /* Check for audio header (new format) */
 960                     else if( !strncmp( st->streamtype, "audio", 5 ) )
 961                     {
 962                         char p_buffer[5];
 963
 964                         p_stream->i_cat = AUDIO_ES;
 965
 966                         /* We need to get rid of the header packet */
 967                         ogg_stream_packetout( &p_stream->os, &oggpacket );
 968
 969                         p_stream->p_wf = (WAVEFORMATEX *)
 970                             malloc( sizeof(WAVEFORMATEX) );
 971                         if( !p_stream->p_wf )
 972                         {
 973                             /* Mem allocation error, just ignore the stream */
 974                             free( p_stream );
 975                             p_ogg->i_streams--;
 976                             continue;
 977                         }
 978
 979                         memcpy( p_buffer, st->subtype, 4 );
 980                         p_buffer[4] = '\0';
 981                         p_stream->p_wf->wFormatTag = strtol(p_buffer,NULL,16);
 982                         p_stream->p_wf->nChannels =
 983                             GetWLE(&st->sh.audio.channels);
 984                         p_stream->f_rate = p_stream->p_wf->nSamplesPerSec =
 985                             GetQWLE(&st->samples_per_unit);
 986                         p_stream->i_bitrate = p_stream->p_wf->nAvgBytesPerSec =
 987                             GetDWLE(&st->sh.audio.avgbytespersec);
 988                         p_stream->i_bitrate *= 8;
 989                         p_stream->p_wf->nBlockAlign =
 990                             GetWLE(&st->sh.audio.blockalign);
 991                         p_stream->p_wf->wBitsPerSample =
 992                             GetWLE(&st->bits_per_sample);
 993                         p_stream->p_wf->cbSize = 0;
 994
 995                         switch( p_stream->p_wf->wFormatTag )
 996                         {
 997                         case WAVE_FORMAT_PCM:
 998                             p_stream->i_fourcc =
 999                                 VLC_FOURCC( 'a', 'r', 'a', 'w' );
1000                             break;
1001                         case WAVE_FORMAT_MPEG:
1002                         case WAVE_FORMAT_MPEGLAYER3:
1003                             p_stream->i_fourcc =
1004                                 VLC_FOURCC( 'm', 'p', 'g', 'a' );
1005                             break;
1006                         case WAVE_FORMAT_A52:
1007                             p_stream->i_fourcc =
1008                                 VLC_FOURCC( 'a', '5', '2', ' ' );
1009                             break;
1010                         case WAVE_FORMAT_WMA1:
1011                             p_stream->i_fourcc =
1012                                 VLC_FOURCC( 'w', 'm', 'a', '1' );
1013                             break;
1014                         case WAVE_FORMAT_WMA2:
1015                             p_stream->i_fourcc =
1016                                 VLC_FOURCC( 'w', 'm', 'a', '2' );
1017                             break;
1018                         default:
1019                             p_stream->i_fourcc = VLC_FOURCC( 'm', 's',
1020                                 ( p_stream->p_wf->wFormatTag >> 8 ) & 0xff,
1021                                 p_stream->p_wf->wFormatTag & 0xff );
1022                         }
1023
1024                         msg_Dbg( p_input, "found audio header of type: %.4s",
1025                                  (char *)&p_stream->i_fourcc );
1026                         msg_Dbg( p_input, "audio:0x%4.4x channels:%d %dHz "
1027                                  "%dbits/sample %dkb/s",
1028                                  p_stream->p_wf->wFormatTag,
1029                                  p_stream->p_wf->nChannels,
1030                                  p_stream->p_wf->nSamplesPerSec,
1031                                  p_stream->p_wf->wBitsPerSample,
1032                                  p_stream->p_wf->nAvgBytesPerSec * 8 / 1024 );
1033                         {
1034                             char title[sizeof("Stream") + 10];
1035                             input_info_category_t *p_cat;
1036                             sprintf( title, "Stream %d", p_ogg->i_streams );
1037                             p_cat = input_InfoCategory( p_input, title );
1038                             input_AddInfo( p_cat, _("Type"), _("Audio") );
1039                             input_AddInfo( p_cat, _("Codec"), "%.4s",
1040                                            (char *)&p_stream->i_fourcc );
1041                             input_AddInfo( p_cat, _("Sample Rate"), "%d",
1042                                            p_stream->p_wf->nSamplesPerSec );
1043                             input_AddInfo( p_cat, _("Bit Rate"), "%d",
1044                                            p_stream->p_wf->nAvgBytesPerSec * 8
1045                                               / 1024 );
1046                             input_AddInfo( p_cat, _("Channels"), "%d",
1047                                            p_stream->p_wf->nChannels );
1048                             input_AddInfo( p_cat, _("Bits per Sample"), "%d",
1049                                            p_stream->p_wf->wBitsPerSample );
1050                         }
1051                     }
1052                     /* Check for text (subtitles) header */
1053                     else if( !strncmp(st->streamtype, "text", 4) )
1054                     {
1055                         /* We need to get rid of the header packet */
1056                         ogg_stream_packetout( &p_stream->os, &oggpacket );
1057
1058                         msg_Dbg( p_input, "found text subtitles header" );
1059                         p_stream->i_cat = SPU_ES;
1060                         p_stream->i_fourcc =
1061                             VLC_FOURCC( 's', 'u', 'b', 't' );
1062                         p_stream->f_rate = 1000; /* granulepos is in milisec */
1063                     }
1064                     else
1065                     {
1066                         msg_Dbg( p_input, "stream %d has a header marker "
1067                             "but is of an unknown type", p_ogg->i_streams-1 );
1068                         free( p_stream );
1069                         p_ogg->i_streams--;
1070                     }
1071                 }
1072                 else
1073                 {
1074                     msg_Dbg( p_input, "stream %d is of unknown type",
1075                              p_ogg->i_streams-1 );
1076                     free( p_stream );
1077                     p_ogg->i_streams--;
1078                 }
1079
1080 #undef p_stream
1081
1082                 if( Ogg_ReadPage( p_input, p_ogg, &oggpage ) != VLC_SUCCESS )
1083                     return VLC_EGENERIC;
1084             }
1085
1086             /* This is the first data page, which means we are now finished
1087              * with the initial pages. We just need to store it in the relevant
1088              * bitstream. */
1089             for( i_stream = 0; i_stream < p_ogg->i_streams; i_stream++ )
1090             {
1091                 if( ogg_stream_pagein( &p_ogg->pp_stream[i_stream]->os,
1092                                        &oggpage ) == 0 )
1093                 {
1094                     break;
1095                 }
1096             }
1097             return VLC_SUCCESS;
1098         }
1099     }
1100     return VLC_EGENERIC;
1101 }
1102
1103 /*****************************************************************************
1104  * Activate: initializes ogg demux structures
1105  *****************************************************************************/
1106 static int Activate( vlc_object_t * p_this )
1107 {
1108     input_thread_t *p_input = (input_thread_t *)p_this;
1109     demux_sys_t    *p_ogg;
1110     int            b_forced;
1111
1112     p_input->p_demux_data = NULL;
1113     b_forced = ( ( *p_input->psz_demux )&&
1114                  ( !strncmp( p_input->psz_demux, "ogg", 10 ) ) ) ? 1 : 0;
1115
1116     /* Check if we are dealing with an ogg stream */
1117     if( !b_forced && ( Ogg_Check( p_input ) != VLC_SUCCESS ) )
1118         return -1;
1119
1120     /* Allocate p_ogg */
1121     if( !( p_ogg = malloc( sizeof( demux_sys_t ) ) ) )
1122     {
1123         msg_Err( p_input, "out of memory" );
1124         goto error;
1125     }
1126     memset( p_ogg, 0, sizeof( demux_sys_t ) );
1127     p_input->p_demux_data = p_ogg;
1128     p_ogg->pp_stream = NULL;
1129     p_ogg->p_stream_video = NULL;
1130     p_ogg->p_stream_audio = NULL;
1131     p_ogg->p_stream_spu = NULL;
1132
1133     /* Initialize the Ogg physical bitstream parser */
1134     ogg_sync_init( &p_ogg->oy );
1135
1136     /*Set exported functions */
1137     p_input->pf_demux = Demux;
1138     p_input->pf_demux_control = Control;
1139
1140     /* Initialize access plug-in structures. */
1141     if( p_input->i_mtu == 0 )
1142     {
1143         /* Improve speed. */
1144         p_input->i_bufsize = INPUT_DEFAULT_BUFSIZE;
1145     }
1146
1147     /* Create one program */
1148     vlc_mutex_lock( &p_input->stream.stream_lock );
1149     if( input_InitStream( p_input, 0 ) == -1)
1150     {
1151         vlc_mutex_unlock( &p_input->stream.stream_lock );
1152         msg_Err( p_input, "cannot init stream" );
1153         goto error;
1154     }
1155     if( input_AddProgram( p_input, 0, 0) == NULL )
1156     {
1157         vlc_mutex_unlock( &p_input->stream.stream_lock );
1158         msg_Err( p_input, "cannot add program" );
1159         goto error;
1160     }
1161     p_input->stream.p_selected_program = p_input->stream.pp_programs[0];
1162     vlc_mutex_unlock( &p_input->stream.stream_lock );
1163
1164     /* Begnning of stream, tell the demux to look for elementary streams. */
1165     p_ogg->b_eos = VLC_TRUE;
1166
1167     return 0;
1168
1169  error:
1170     Deactivate( (vlc_object_t *)p_input );
1171     return -1;
1172
1173 }
1174
1175 /****************************************************************************
1176  * Ogg_EndOfStream: Look for Beginning of Stream ogg pages and add Elementary
1177  *                  streams.
1178  ****************************************************************************/
1179 static int Ogg_BeginningOfStream( input_thread_t *p_input, demux_sys_t *p_ogg)
1180 {
1181     int i_stream;
1182
1183     /* Find the logical streams embedded in the physical stream and
1184      * initialize our p_ogg structure. */
1185     if( Ogg_FindLogicalStreams( p_input, p_ogg ) != VLC_SUCCESS )
1186     {
1187         msg_Warn( p_input, "couldn't find any ogg logical stream" );
1188         return VLC_EGENERIC;
1189     }
1190
1191     vlc_mutex_lock( &p_input->stream.stream_lock );
1192     p_input->stream.i_mux_rate = 0;
1193     vlc_mutex_unlock( &p_input->stream.stream_lock );
1194
1195     for( i_stream = 0 ; i_stream < p_ogg->i_streams; i_stream++ )
1196     {
1197 #define p_stream p_ogg->pp_stream[i_stream]
1198         vlc_mutex_lock( &p_input->stream.stream_lock );
1199         p_stream->p_es = input_AddES( p_input,
1200                                       p_input->stream.p_selected_program,
1201                                       i_stream,
1202                                       p_stream->i_cat, NULL, 0 );
1203         p_input->stream.i_mux_rate += (p_stream->i_bitrate / ( 8 * 50 ));
1204         vlc_mutex_unlock( &p_input->stream.stream_lock );
1205         p_stream->p_es->i_stream_id = i_stream;
1206         p_stream->p_es->i_fourcc = p_stream->i_fourcc;
1207         p_stream->p_es->p_waveformatex      = (void*)p_stream->p_wf;
1208         p_stream->p_es->p_bitmapinfoheader  = (void*)p_stream->p_bih;
1209
1210         p_stream->i_pcr  = p_stream->i_previous_pcr = -1;
1211 #undef p_stream
1212     }
1213
1214     for( i_stream = 0; i_stream < p_ogg->i_streams; i_stream++ )
1215     {
1216 #define p_stream  p_ogg->pp_stream[i_stream]
1217         switch( p_stream->p_es->i_cat )
1218         {
1219             case( VIDEO_ES ):
1220                 if( (p_ogg->p_stream_video == NULL) )
1221                 {
1222                     p_ogg->p_stream_video = p_stream;
1223                     /* TODO add test to see if a decoder has been found */
1224                     Ogg_ElemStreamStart( p_input, p_ogg, i_stream );
1225                 }
1226                 break;
1227
1228             case( AUDIO_ES ):
1229                 if( (p_ogg->p_stream_audio == NULL) )
1230                 {
1231                     int i_audio = config_GetInt( p_input, "audio-channel" );
1232                     if( i_audio == i_stream || i_audio <= 0 ||
1233                         i_audio >= p_ogg->i_streams ||
1234                         p_ogg->pp_stream[i_audio]->p_es->i_cat != AUDIO_ES )
1235                     {
1236                         p_ogg->p_stream_audio = p_stream;
1237                         Ogg_ElemStreamStart( p_input, p_ogg, i_stream );
1238                     }
1239                 }
1240                 break;
1241
1242             case( SPU_ES ):
1243                 if( (p_ogg->p_stream_spu == NULL) )
1244                 {
1245                     /* for spu, default is none */
1246                     int i_spu = config_GetInt( p_input, "spu-channel" );
1247                     if( i_spu < 0 || i_spu >= p_ogg->i_streams ||
1248                         p_ogg->pp_stream[i_spu]->p_es->i_cat != SPU_ES )
1249                     {
1250                         break;
1251                     }
1252                     else if( i_spu == i_stream )
1253                     {
1254                         p_ogg->p_stream_spu = p_stream;
1255                         Ogg_ElemStreamStart( p_input, p_ogg, i_stream );
1256                     }
1257                 }
1258                 break;
1259
1260             default:
1261                 break;
1262         }
1263 #undef p_stream
1264     }
1265
1266     /* we select the first audio and video ES */
1267     vlc_mutex_lock( &p_input->stream.stream_lock );
1268     if( !p_ogg->p_stream_video )
1269     {
1270         msg_Warn( p_input, "no video stream found" );
1271     }
1272     if( !p_ogg->p_stream_audio )
1273     {
1274         msg_Warn( p_input, "no audio stream found!" );
1275     }
1276     p_input->stream.p_selected_program->b_is_ok = 1;
1277     vlc_mutex_unlock( &p_input->stream.stream_lock );
1278
1279     return VLC_SUCCESS;
1280 }
1281
1282 /****************************************************************************
1283  * Ogg_EndOfStream: clean up the ES when an End of Stream is detected.
1284  ****************************************************************************/
1285 static void Ogg_EndOfStream( input_thread_t *p_input, demux_sys_t *p_ogg )
1286 {
1287     int i_stream, j;
1288
1289 #define p_stream p_ogg->pp_stream[i_stream]
1290         vlc_mutex_lock( &p_input->stream.stream_lock );
1291         if( p_input->stream.i_pgrm_number )
1292         while( p_input->stream.p_selected_program->i_es_number )
1293         {
1294             input_DelES( p_input,
1295                          p_input->stream.p_selected_program->pp_es[0] );
1296         }
1297         vlc_mutex_unlock( &p_input->stream.stream_lock );
1298 #undef p_stream
1299
1300     for( i_stream = 0 ; i_stream < p_ogg->i_streams; i_stream++ )
1301     {
1302 #define p_stream p_ogg->pp_stream[i_stream]
1303         vlc_mutex_lock( &p_input->stream.stream_lock );
1304         p_input->stream.i_mux_rate -= (p_stream->i_bitrate / ( 8 * 50 ));
1305         vlc_mutex_unlock( &p_input->stream.stream_lock );
1306 #undef p_stream
1307
1308         ogg_stream_clear( &p_ogg->pp_stream[i_stream]->os );
1309         for( j = 0; j < p_ogg->pp_stream[i_stream]->i_packets_backup; j++ )
1310         {
1311             free( p_ogg->pp_stream[i_stream]->p_packets_backup[j].packet );
1312         }
1313         if( p_ogg->pp_stream[i_stream]->p_packets_backup)
1314             free( p_ogg->pp_stream[i_stream]->p_packets_backup );
1315
1316 #if 0 /* hmmm, it's already freed in input_DelES() */
1317             if( p_ogg->pp_stream[i]->p_bih )
1318                 free( p_ogg->pp_stream[i]->p_bih );
1319             if( p_ogg->pp_stream[i]->p_wf )
1320                 free( p_ogg->pp_stream[i]->p_wf );
1321 #endif
1322
1323         free( p_ogg->pp_stream[i_stream] );
1324     }
1325
1326     /* Reinit p_ogg */
1327     if( p_ogg->pp_stream ) free( p_ogg->pp_stream );
1328     p_ogg->pp_stream = NULL;
1329     p_ogg->i_streams = 0;
1330     p_ogg->p_stream_video = NULL;
1331     p_ogg->p_stream_audio = NULL;
1332     p_ogg->p_stream_spu = NULL;
1333 }
1334
1335 /*****************************************************************************
1336  * Deactivate: frees unused data
1337  *****************************************************************************/
1338 static void Deactivate( vlc_object_t *p_this )
1339 {
1340     input_thread_t *p_input = (input_thread_t *)p_this;
1341     demux_sys_t *p_ogg = (demux_sys_t *)p_input->p_demux_data  ;
1342
1343     if( p_ogg )
1344     {
1345         /* Cleanup the bitstream parser */
1346         ogg_sync_clear( &p_ogg->oy );
1347
1348         Ogg_EndOfStream( p_input, p_ogg );
1349
1350         free( p_ogg );
1351     }
1352 }
1353
1354 /*****************************************************************************
1355  * Demux: reads and demuxes data packets
1356  *****************************************************************************
1357  * Returns -1 in case of error, 0 in case of EOF, 1 otherwise
1358  *****************************************************************************/
1359 static int Demux( input_thread_t * p_input )
1360 {
1361     demux_sys_t *p_ogg = (demux_sys_t *)p_input->p_demux_data;
1362     ogg_page    oggpage;
1363     ogg_packet  oggpacket;
1364     int         i_stream;
1365
1366     if( p_ogg->b_eos )
1367     {
1368         if( Ogg_BeginningOfStream( p_input, p_ogg ) != VLC_SUCCESS ) return 0;
1369         p_ogg->b_eos = VLC_FALSE;
1370
1371         msg_Dbg( p_input, "beginning of a group of logical streams" );
1372
1373         p_input->stream.p_selected_program->i_synchro_state = SYNCHRO_REINIT;
1374         input_ClockManageRef( p_input, p_input->stream.p_selected_program, 0 );
1375     }
1376
1377 #define p_stream p_ogg->pp_stream[i_stream]
1378
1379     /* detect new selected/unselected streams */
1380     for( i_stream = 0; i_stream < p_ogg->i_streams; i_stream++ )
1381     {
1382         if( p_stream->p_es )
1383         {
1384             if( p_stream->p_es->p_decoder_fifo &&
1385                 !p_stream->i_activated )
1386             {
1387                 Ogg_ElemStreamStart( p_input, p_ogg, i_stream );
1388             }
1389             else
1390             if( !p_stream->p_es->p_decoder_fifo &&
1391                 p_stream->i_activated )
1392             {
1393                 Ogg_ElemStreamStop( p_input, p_ogg, i_stream );
1394             }
1395         }
1396     }
1397
1398     /* search for new video and audio stream to select
1399      * if current have been unselected */
1400     if( ( !p_ogg->p_stream_video )
1401             || ( !p_ogg->p_stream_video->p_es->p_decoder_fifo ) )
1402     {
1403         p_ogg->p_stream_video = NULL;
1404         for( i_stream = 0; i_stream < p_ogg->i_streams; i_stream++ )
1405         {
1406             if( ( p_stream->i_cat == VIDEO_ES )
1407                   &&( p_stream->p_es->p_decoder_fifo ) )
1408             {
1409                 p_ogg->p_stream_video = p_stream;
1410                 break;
1411             }
1412         }
1413     }
1414     if( ( !p_ogg->p_stream_audio )
1415             ||( !p_ogg->p_stream_audio->p_es->p_decoder_fifo ) )
1416     {
1417         p_ogg->p_stream_audio = NULL;
1418         for( i_stream = 0; i_stream < p_ogg->i_streams; i_stream++ )
1419         {
1420             if( ( p_stream->i_cat == AUDIO_ES )
1421                   &&( p_stream->p_es->p_decoder_fifo ) )
1422             {
1423                 p_ogg->p_stream_audio = p_stream;
1424                 break;
1425             }
1426         }
1427     }
1428
1429     if( p_input->stream.p_selected_program->i_synchro_state == SYNCHRO_REINIT )
1430     {
1431         msg_Warn( p_input, "synchro reinit" );
1432
1433         for( i_stream = 0; i_stream < p_ogg->i_streams; i_stream++ )
1434         {
1435             /* we'll trash all the data until we find the next pcr */
1436             p_stream->b_reinit = 1;
1437             p_stream->i_pcr = -1;
1438             p_stream->i_interpolated_pcr = -1;
1439         }
1440     }
1441
1442
1443     /*
1444      * Demux an ogg page from the stream
1445      */
1446     if( Ogg_ReadPage( p_input, p_ogg, &oggpage ) != VLC_SUCCESS )
1447     {
1448         return 0; /* EOF */
1449     }
1450
1451     /* Test for End of Stream */
1452     if( ogg_page_eos( &oggpage ) )
1453     {
1454         msg_Dbg( p_input, "end of a group of logical streams" );
1455
1456         Ogg_EndOfStream( p_input, p_ogg );
1457         p_ogg->b_eos = VLC_TRUE;
1458         return 1;
1459     }
1460
1461     for( i_stream = 0; i_stream < p_ogg->i_streams; i_stream++ )
1462     {
1463         if( ogg_stream_pagein( &p_stream->os, &oggpage ) != 0 )
1464             continue;
1465
1466         while( ogg_stream_packetout( &p_stream->os, &oggpacket ) > 0 )
1467         {
1468             if( !p_stream->p_es )
1469             {
1470                 break;
1471             }
1472
1473             if( p_stream->b_reinit )
1474             {
1475                 /* If synchro is re-initialized we need to drop all the packets
1476                  * until we find a new dated one. */
1477                 Ogg_UpdatePCR( p_stream, &oggpacket );
1478
1479                 if( p_stream->i_pcr >= 0 )
1480                 {
1481                     p_stream->b_reinit = 0;
1482                 }
1483                 else
1484                 {
1485                     p_stream->i_interpolated_pcr = -1;
1486                     continue;
1487                 }
1488
1489                 /* An Ogg/vorbis packet contains an end date granulepos */
1490                 if( p_stream->i_fourcc == VLC_FOURCC( 'v','o','r','b' ) )
1491                 {
1492                     if( ogg_stream_packetout( &p_stream->os, &oggpacket ) > 0 )
1493                     {
1494                         Ogg_DecodePacket( p_input, p_stream, &oggpacket );
1495                     }
1496                     continue;
1497                 }
1498             }
1499
1500             Ogg_DecodePacket( p_input, p_stream, &oggpacket );
1501         }
1502         break;
1503     }
1504
1505     i_stream = 0; p_ogg->i_pcr = -1;
1506     for( ; i_stream < p_ogg->i_streams; i_stream++ )
1507     {
1508         if( p_stream->i_cat == SPU_ES )
1509             continue;
1510         if( p_stream->i_interpolated_pcr < 0 )
1511             continue;
1512
1513         if( p_ogg->i_pcr < 0 || p_stream->i_interpolated_pcr < p_ogg->i_pcr )
1514             p_ogg->i_pcr = p_stream->i_interpolated_pcr;
1515     }
1516
1517     if( p_input->stream.p_selected_program->i_synchro_state != SYNCHRO_REINIT )
1518     {
1519         input_ClockManageRef( p_input, p_input->stream.p_selected_program,
1520                               p_ogg->i_pcr );
1521     }
1522
1523 #undef p_stream
1524
1525     return 1;
1526 }
1527
1528 /*****************************************************************************
1529  * Control:
1530  *****************************************************************************/
1531 static int Control( input_thread_t *p_input, int i_query, va_list args )
1532 {
1533     demux_sys_t *p_ogg  = (demux_sys_t *)p_input->p_demux_data;
1534     int64_t *pi64;
1535
1536     switch( i_query )
1537     {
1538         case DEMUX_GET_TIME:
1539             pi64 = (int64_t*)va_arg( args, int64_t * );
1540             *pi64 = p_ogg->i_pcr * 100 / 9;
1541             return VLC_SUCCESS;
1542
1543         default:
1544             return demux_vaControlDefault( p_input, i_query, args );
1545     }
1546 }