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

   1 /*****************************************************************************
   2  * ogg.c : ogg stream demux module for vlc
   3  *****************************************************************************
   4  * Copyright (C) 2001-2007 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Gildas Bazin <gbazin@netcourrier.com>
   8  *          Andre Pang <Andre.Pang@csiro.au> (Annodex support)
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  23  *****************************************************************************/
  24
  25 /*****************************************************************************
  26  * Preamble
  27  *****************************************************************************/
  28 #ifdef HAVE_CONFIG_H
  29 # include "config.h"
  30 #endif
  31
  32 #include <vlc_common.h>
  33 #include <vlc_plugin.h>
  34 #include <vlc_demux.h>
  35 #include <vlc_meta.h>
  36 #include <vlc_input.h>
  37
  38 #include <ogg/ogg.h>
  39
  40 #include <vlc_codecs.h>
  41 #include <vlc_bits.h>
  42
  43 /*****************************************************************************
  44  * Module descriptor
  45  *****************************************************************************/
  46 static int  Open ( vlc_object_t * );
  47 static void Close( vlc_object_t * );
  48
  49 vlc_module_begin();
  50     set_shortname ( "OGG" );
  51     set_description( N_("OGG demuxer" ) );
  52     set_category( CAT_INPUT );
  53     set_subcategory( SUBCAT_INPUT_DEMUX );
  54     set_capability( "demux", 50 );
  55     set_callbacks( Open, Close );
  56     add_shortcut( "ogg" );
  57 vlc_module_end();
  58
  59
  60 /*****************************************************************************
  61  * Definitions of structures and functions used by this plugins
  62  *****************************************************************************/
  63 typedef struct logical_stream_s
  64 {
  65     ogg_stream_state os;                        /* logical stream of packets */
  66
  67     es_format_t      fmt;
  68     es_format_t      fmt_old;                  /* format of old ES is reused */
  69     es_out_id_t      *p_es;
  70     double           f_rate;
  71
  72     int              i_serial_no;
  73
  74     /* the header of some logical streams (eg vorbis) contain essential
  75      * data for the decoder. We back them up here in case we need to re-feed
  76      * them to the decoder. */
  77     int              b_force_backup;
  78     int              i_packets_backup;
  79     uint8_t          *p_headers;
  80     int              i_headers;
  81
  82     /* program clock reference (in units of 90kHz) derived from the previous
  83      * granulepos */
  84     mtime_t          i_pcr;
  85     mtime_t          i_interpolated_pcr;
  86     mtime_t          i_previous_pcr;
  87
  88     /* Misc */
  89     int b_reinit;
  90     int i_granule_shift;
  91
  92     /* kate streams have the number of headers in the ID header */
  93     int i_kate_num_headers;
  94
  95     /* for Annodex logical bitstreams */
  96     int secondary_header_packets;
  97
  98 } logical_stream_t;
  99
 100 struct demux_sys_t
 101 {
 102     ogg_sync_state oy;        /* sync and verify incoming physical bitstream */
 103
 104     int i_streams;                           /* number of logical bitstreams */
 105     logical_stream_t **pp_stream;  /* pointer to an array of logical streams */
 106
 107     logical_stream_t *p_old_stream; /* pointer to a old logical stream to avoid recreating it */
 108
 109     /* program clock reference (in units of 90kHz) derived from the pcr of
 110      * the sub-streams */
 111     mtime_t i_pcr;
 112
 113     /* stream state */
 114     int     i_eos;
 115
 116     /* bitrate */
 117     int     i_bitrate;
 118 };
 119
 120 /* OggDS headers for the new header format (used in ogm files) */
 121 typedef struct stream_header_video
 122 {
 123     ogg_int32_t width;
 124     ogg_int32_t height;
 125 } stream_header_video;
 126
 127 typedef struct stream_header_audio
 128 {
 129     ogg_int16_t channels;
 130     ogg_int16_t blockalign;
 131     ogg_int32_t avgbytespersec;
 132 } stream_header_audio;
 133
 134 typedef struct stream_header
 135 {
 136     char        streamtype[8];
 137     char        subtype[4];
 138
 139     ogg_int32_t size;                               /* size of the structure */
 140
 141     ogg_int64_t time_unit;                              /* in reference time */
 142     ogg_int64_t samples_per_unit;
 143     ogg_int32_t default_len;                                /* in media time */
 144
 145     ogg_int32_t buffersize;
 146     ogg_int16_t bits_per_sample;
 147
 148     union
 149     {
 150         /* Video specific */
 151         stream_header_video video;
 152         /* Audio specific */
 153         stream_header_audio audio;
 154     } sh;
 155 } stream_header;
 156
 157 #define OGG_BLOCK_SIZE 4096
 158
 159 /* Some defines from OggDS */
 160 #define PACKET_TYPE_HEADER   0x01
 161 #define PACKET_TYPE_BITS     0x07
 162 #define PACKET_LEN_BITS01    0xc0
 163 #define PACKET_LEN_BITS2     0x02
 164 #define PACKET_IS_SYNCPOINT  0x08
 165
 166 /*****************************************************************************
 167  * Local prototypes
 168  *****************************************************************************/
 169 static int  Demux  ( demux_t * );
 170 static int  Control( demux_t *, int, va_list );
 171
 172 /* Bitstream manipulation */
 173 static int  Ogg_ReadPage     ( demux_t *, ogg_page * );
 174 static void Ogg_UpdatePCR    ( logical_stream_t *, ogg_packet * );
 175 static void Ogg_DecodePacket ( demux_t *, logical_stream_t *, ogg_packet * );
 176
 177 static int Ogg_BeginningOfStream( demux_t *p_demux );
 178 static int Ogg_FindLogicalStreams( demux_t *p_demux );
 179 static void Ogg_EndOfStream( demux_t *p_demux );
 180
 181 /* */
 182 static void Ogg_LogicalStreamDelete( demux_t *p_demux, logical_stream_t *p_stream );
 183 static bool Ogg_LogicalStreamResetEsFormat( demux_t *p_demux, logical_stream_t *p_stream );
 184
 185 /* Logical bitstream headers */
 186 static void Ogg_ReadTheoraHeader( logical_stream_t *, ogg_packet * );
 187 static void Ogg_ReadVorbisHeader( logical_stream_t *, ogg_packet * );
 188 static void Ogg_ReadSpeexHeader( logical_stream_t *, ogg_packet * );
 189 static void Ogg_ReadKateHeader( logical_stream_t *, ogg_packet * );
 190 static void Ogg_ReadFlacHeader( demux_t *, logical_stream_t *, ogg_packet * );
 191 static void Ogg_ReadAnnodexHeader( vlc_object_t *, logical_stream_t *, ogg_packet * );
 192 static void Ogg_ReadDiracHeader( logical_stream_t *, ogg_packet * );
 193
 194 /*****************************************************************************
 195  * Open: initializes ogg demux structures
 196  *****************************************************************************/
 197 static int Open( vlc_object_t * p_this )
 198 {
 199     demux_t *p_demux = (demux_t *)p_this;
 200     demux_sys_t    *p_sys;
 201     const uint8_t  *p_peek;
 202
 203
 204     /* Check if we are dealing with an ogg stream */
 205     if( stream_Peek( p_demux->s, &p_peek, 4 ) < 4 ) return VLC_EGENERIC;
 206     if( !p_demux->b_force && memcmp( p_peek, "OggS", 4 ) )
 207     {
 208         return VLC_EGENERIC;
 209     }
 210
 211     /* Set exported functions */
 212     p_demux->pf_demux = Demux;
 213     p_demux->pf_control = Control;
 214     p_demux->p_sys = p_sys = malloc( sizeof( demux_sys_t ) );
 215
 216     memset( p_sys, 0, sizeof( demux_sys_t ) );
 217     p_sys->i_bitrate = 0;
 218     p_sys->pp_stream = NULL;
 219     p_sys->p_old_stream = NULL;
 220
 221     /* Begnning of stream, tell the demux to look for elementary streams. */
 222     p_sys->i_eos = 0;
 223
 224     /* Initialize the Ogg physical bitstream parser */
 225     ogg_sync_init( &p_sys->oy );
 226
 227     return VLC_SUCCESS;
 228 }
 229
 230 /*****************************************************************************
 231  * Close: frees unused data
 232  *****************************************************************************/
 233 static void Close( vlc_object_t *p_this )
 234 {
 235     demux_t *p_demux = (demux_t *)p_this;
 236     demux_sys_t *p_sys = p_demux->p_sys  ;
 237
 238     /* Cleanup the bitstream parser */
 239     ogg_sync_clear( &p_sys->oy );
 240
 241     Ogg_EndOfStream( p_demux );
 242
 243     if( p_sys->p_old_stream )
 244         Ogg_LogicalStreamDelete( p_demux, p_sys->p_old_stream );
 245
 246     free( p_sys );
 247 }
 248
 249 /*****************************************************************************
 250  * Demux: reads and demuxes data packets
 251  *****************************************************************************
 252  * Returns -1 in case of error, 0 in case of EOF, 1 otherwise
 253  *****************************************************************************/
 254 static int Demux( demux_t * p_demux )
 255 {
 256     demux_sys_t *p_sys = p_demux->p_sys;
 257     ogg_page    oggpage;
 258     ogg_packet  oggpacket;
 259     int         i_stream;
 260
 261
 262     if( p_sys->i_eos == p_sys->i_streams )
 263     {
 264         if( p_sys->i_eos )
 265         {
 266             msg_Dbg( p_demux, "end of a group of logical streams" );
 267             /* We keep the ES to try reusing it in Ogg_BeginningOfStream
 268              * only 1 ES is supported (common case for ogg web radio) */
 269             if( p_sys->i_streams == 1 )
 270             {
 271                 p_sys->p_old_stream = p_sys->pp_stream[0];
 272                 TAB_CLEAN( p_sys->i_streams, p_sys->pp_stream );
 273             }
 274             Ogg_EndOfStream( p_demux );
 275         }
 276
 277         p_sys->i_eos = 0;
 278         if( Ogg_BeginningOfStream( p_demux ) != VLC_SUCCESS )
 279             return 0;
 280
 281         msg_Dbg( p_demux, "beginning of a group of logical streams" );
 282         es_out_Control( p_demux->out, ES_OUT_RESET_PCR );
 283     }
 284
 285     /*
 286      * Demux an ogg page from the stream
 287      */
 288     if( Ogg_ReadPage( p_demux, &oggpage ) != VLC_SUCCESS )
 289     {
 290         return 0; /* EOF */
 291     }
 292
 293     /* Test for End of Stream */
 294     if( ogg_page_eos( &oggpage ) ) p_sys->i_eos++;
 295
 296
 297     for( i_stream = 0; i_stream < p_sys->i_streams; i_stream++ )
 298     {
 299         logical_stream_t *p_stream = p_sys->pp_stream[i_stream];
 300
 301         if( ogg_stream_pagein( &p_stream->os, &oggpage ) != 0 )
 302             continue;
 303
 304         while( ogg_stream_packetout( &p_stream->os, &oggpacket ) > 0 )
 305         {
 306             /* Read info from any secondary header packets, if there are any */
 307             if( p_stream->secondary_header_packets > 0 )
 308             {
 309                 if( p_stream->fmt.i_codec == VLC_FOURCC('t','h','e','o') &&
 310                         oggpacket.bytes >= 7 &&
 311                         ! memcmp( oggpacket.packet, "\x80theora", 7 ) )
 312                 {
 313                     Ogg_ReadTheoraHeader( p_stream, &oggpacket );
 314                     p_stream->secondary_header_packets = 0;
 315                 }
 316                 else if( p_stream->fmt.i_codec == VLC_FOURCC('v','o','r','b') &&
 317                         oggpacket.bytes >= 7 &&
 318                         ! memcmp( oggpacket.packet, "\x01vorbis", 7 ) )
 319                 {
 320                     Ogg_ReadVorbisHeader( p_stream, &oggpacket );
 321                     p_stream->secondary_header_packets = 0;
 322                 }
 323                 else if ( p_stream->fmt.i_codec == VLC_FOURCC('c','m','m','l') )
 324                 {
 325                     p_stream->secondary_header_packets = 0;
 326                 }
 327             }
 328
 329             if( p_stream->b_reinit )
 330             {
 331                 /* If synchro is re-initialized we need to drop all the packets
 332                  * until we find a new dated one. */
 333                 Ogg_UpdatePCR( p_stream, &oggpacket );
 334
 335                 if( p_stream->i_pcr >= 0 )
 336                 {
 337                     p_stream->b_reinit = 0;
 338                 }
 339                 else
 340                 {
 341                     p_stream->i_interpolated_pcr = -1;
 342                     continue;
 343                 }
 344
 345                 /* An Ogg/vorbis packet contains an end date granulepos */
 346                 if( p_stream->fmt.i_codec == VLC_FOURCC( 'v','o','r','b' ) ||
 347                     p_stream->fmt.i_codec == VLC_FOURCC( 's','p','x',' ' ) ||
 348                     p_stream->fmt.i_codec == VLC_FOURCC( 'f','l','a','c' ) )
 349                 {
 350                     if( ogg_stream_packetout( &p_stream->os, &oggpacket ) > 0 )
 351                     {
 352                         Ogg_DecodePacket( p_demux, p_stream, &oggpacket );
 353                     }
 354                     else
 355                     {
 356                         es_out_Control( p_demux->out, ES_OUT_SET_PCR,
 357                                         p_stream->i_pcr );
 358                     }
 359                     continue;
 360                 }
 361             }
 362
 363             Ogg_DecodePacket( p_demux, p_stream, &oggpacket );
 364         }
 365         break;
 366     }
 367
 368     i_stream = 0; p_sys->i_pcr = -1;
 369     for( ; i_stream < p_sys->i_streams; i_stream++ )
 370     {
 371         logical_stream_t *p_stream = p_sys->pp_stream[i_stream];
 372
 373         if( p_stream->fmt.i_cat == SPU_ES )
 374             continue;
 375         if( p_stream->i_interpolated_pcr < 0 )
 376             continue;
 377
 378         if( p_sys->i_pcr < 0 || p_stream->i_interpolated_pcr < p_sys->i_pcr )
 379             p_sys->i_pcr = p_stream->i_interpolated_pcr;
 380     }
 381
 382     if( p_sys->i_pcr >= 0 )
 383     {
 384         es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_sys->i_pcr );
 385     }
 386
 387     return 1;
 388 }
 389
 390 /*****************************************************************************
 391  * Control:
 392  *****************************************************************************/
 393 static int Control( demux_t *p_demux, int i_query, va_list args )
 394 {
 395     demux_sys_t *p_sys  = p_demux->p_sys;
 396     int64_t *pi64;
 397     bool *pb_bool;
 398     int i;
 399
 400     switch( i_query )
 401     {
 402         case DEMUX_HAS_UNSUPPORTED_META:
 403             pb_bool = (bool*)va_arg( args, bool* );
 404             *pb_bool = true;
 405             return VLC_SUCCESS;
 406
 407         case DEMUX_GET_TIME:
 408             pi64 = (int64_t*)va_arg( args, int64_t * );
 409             *pi64 = p_sys->i_pcr;
 410             return VLC_SUCCESS;
 411
 412         case DEMUX_SET_TIME:
 413             return VLC_EGENERIC;
 414
 415         case DEMUX_SET_POSITION:
 416             for( i = 0; i < p_sys->i_streams; i++ )
 417             {
 418                 logical_stream_t *p_stream = p_sys->pp_stream[i];
 419
 420                 /* we'll trash all the data until we find the next pcr */
 421                 p_stream->b_reinit = 1;
 422                 p_stream->i_pcr = -1;
 423                 p_stream->i_interpolated_pcr = -1;
 424                 ogg_stream_reset( &p_stream->os );
 425             }
 426             ogg_sync_reset( &p_sys->oy );
 427
 428         default:
 429             return demux_vaControlHelper( p_demux->s, 0, -1, p_sys->i_bitrate,
 430                                            1, i_query, args );
 431     }
 432 }
 433
 434 /****************************************************************************
 435  * Ogg_ReadPage: Read a full Ogg page from the physical bitstream.
 436  ****************************************************************************
 437  * Returns VLC_SUCCESS if a page has been read. An error might happen if we
 438  * are at the end of stream.
 439  ****************************************************************************/
 440 static int Ogg_ReadPage( demux_t *p_demux, ogg_page *p_oggpage )
 441 {
 442     demux_sys_t *p_ogg = p_demux->p_sys  ;
 443     int i_read = 0;
 444     char *p_buffer;
 445
 446     while( ogg_sync_pageout( &p_ogg->oy, p_oggpage ) != 1 )
 447     {
 448         p_buffer = ogg_sync_buffer( &p_ogg->oy, OGG_BLOCK_SIZE );
 449
 450         i_read = stream_Read( p_demux->s, p_buffer, OGG_BLOCK_SIZE );
 451         if( i_read <= 0 )
 452             return VLC_EGENERIC;
 453
 454         ogg_sync_wrote( &p_ogg->oy, i_read );
 455     }
 456
 457     return VLC_SUCCESS;
 458 }
 459
 460 /****************************************************************************
 461  * Ogg_UpdatePCR: update the PCR (90kHz program clock reference) for the
 462  *                current stream.
 463  ****************************************************************************/
 464 static void Ogg_UpdatePCR( logical_stream_t *p_stream,
 465                            ogg_packet *p_oggpacket )
 466 {
 467     /* Convert the granulepos into a pcr */
 468     if( p_oggpacket->granulepos >= 0 )
 469     {
 470         if( p_stream->fmt.i_codec == VLC_FOURCC( 't','h','e','o' ) ||
 471             p_stream->fmt.i_codec == VLC_FOURCC( 'k','a','t','e' ) )
 472         {
 473             ogg_int64_t iframe = p_oggpacket->granulepos >>
 474               p_stream->i_granule_shift;
 475             ogg_int64_t pframe = p_oggpacket->granulepos -
 476               ( iframe << p_stream->i_granule_shift );
 477
 478             p_stream->i_pcr = ( iframe + pframe ) * INT64_C(1000000)
 479                               / p_stream->f_rate;
 480         }
 481         else if( p_stream->fmt.i_codec == VLC_FOURCC( 'd','r','a','c' ) )
 482         {
 483             ogg_int64_t i_dts = p_oggpacket->granulepos >> 31;
 484             /* NB, OggDirac granulepos values are in units of 2*picturerate */
 485             p_stream->i_pcr = (i_dts/2) * INT64_C(1000000) / p_stream->f_rate;
 486         }
 487         else
 488         {
 489             p_stream->i_pcr = p_oggpacket->granulepos * INT64_C(1000000)
 490                               / p_stream->f_rate;
 491         }
 492
 493         p_stream->i_interpolated_pcr = p_stream->i_pcr;
 494     }
 495     else
 496     {
 497         p_stream->i_pcr = -1;
 498
 499         /* no granulepos available, try to interpolate the pcr.
 500          * If we can't then don't touch the old value. */
 501         if( p_stream->fmt.i_cat == VIDEO_ES )
 502             /* 1 frame per packet */
 503             p_stream->i_interpolated_pcr += (INT64_C(1000000) / p_stream->f_rate);
 504         else if( p_stream->fmt.i_bitrate )
 505             p_stream->i_interpolated_pcr +=
 506                 ( p_oggpacket->bytes * INT64_C(1000000) /
 507                   p_stream->fmt.i_bitrate / 8 );
 508     }
 509 }
 510
 511 /****************************************************************************
 512  * Ogg_DecodePacket: Decode an Ogg packet.
 513  ****************************************************************************/
 514 static void Ogg_DecodePacket( demux_t *p_demux,
 515                               logical_stream_t *p_stream,
 516                               ogg_packet *p_oggpacket )
 517 {
 518     block_t *p_block;
 519     bool b_selected;
 520     int i_header_len = 0;
 521     mtime_t i_pts = -1, i_interpolated_pts;
 522
 523     /* Sanity check */
 524     if( !p_oggpacket->bytes )
 525     {
 526         msg_Dbg( p_demux, "discarding 0 sized packet" );
 527         return;
 528     }
 529
 530     if( p_oggpacket->bytes >= 7 &&
 531         ! memcmp ( p_oggpacket->packet, "Annodex", 7 ) )
 532     {
 533         /* it's an Annodex packet -- skip it (do nothing) */
 534         return;
 535     }
 536     else if( p_oggpacket->bytes >= 7 &&
 537         ! memcmp ( p_oggpacket->packet, "AnxData", 7 ) )
 538     {
 539         /* it's an AnxData packet -- skip it (do nothing) */
 540         return;
 541     }
 542
 543     if( p_stream->fmt.i_codec == VLC_FOURCC( 's','u','b','t' ) &&
 544         p_oggpacket->packet[0] & PACKET_TYPE_BITS ) return;
 545
 546     /* Check the ES is selected */
 547     es_out_Control( p_demux->out, ES_OUT_GET_ES_STATE,
 548                     p_stream->p_es, &b_selected );
 549
 550     if( p_stream->b_force_backup )
 551     {
 552         uint8_t *p_extra;
 553         bool b_store_size = true;
 554         bool b_store_num_headers = false;
 555
 556         p_stream->i_packets_backup++;
 557         switch( p_stream->fmt.i_codec )
 558         {
 559         case VLC_FOURCC( 'v','o','r','b' ):
 560         case VLC_FOURCC( 's','p','x',' ' ):
 561         case VLC_FOURCC( 't','h','e','o' ):
 562             if( p_stream->i_packets_backup == 3 ) p_stream->b_force_backup = 0;
 563             break;
 564
 565         case VLC_FOURCC( 'f','l','a','c' ):
 566             if( !p_stream->fmt.audio.i_rate && p_stream->i_packets_backup == 2 )
 567             {
 568                 Ogg_ReadFlacHeader( p_demux, p_stream, p_oggpacket );
 569                 p_stream->b_force_backup = 0;
 570             }
 571             else if( p_stream->fmt.audio.i_rate )
 572             {
 573                 p_stream->b_force_backup = 0;
 574                 if( p_oggpacket->bytes >= 9 )
 575                 {
 576                     p_oggpacket->packet += 9;
 577                     p_oggpacket->bytes -= 9;
 578                 }
 579             }
 580             b_store_size = false;
 581             break;
 582
 583         case VLC_FOURCC( 'k','a','t','e' ):
 584             if( p_stream->i_packets_backup == 1)
 585                 b_store_num_headers = true;
 586             if( p_stream->i_packets_backup == p_stream->i_kate_num_headers ) p_stream->b_force_backup = 0;
 587             break;
 588
 589         default:
 590             p_stream->b_force_backup = 0;
 591             break;
 592         }
 593
 594         /* Backup the ogg packet (likely an header packet) */
 595         p_stream->p_headers =
 596             realloc( p_stream->p_headers, p_stream->i_headers +
 597                      p_oggpacket->bytes + (b_store_size ? 2 : 0) + (b_store_num_headers ? 1 : 0) );
 598         p_extra = p_stream->p_headers + p_stream->i_headers;
 599         if( b_store_num_headers )
 600         {
 601             /* Kate streams store the number of headers in the first header,
 602                so we can't just test for 3 as Vorbis/Theora */
 603             *(p_extra++) = p_stream->i_kate_num_headers;
 604         }
 605         if( b_store_size )
 606         {
 607             *(p_extra++) = p_oggpacket->bytes >> 8;
 608             *(p_extra++) = p_oggpacket->bytes & 0xFF;
 609         }
 610         memcpy( p_extra, p_oggpacket->packet, p_oggpacket->bytes );
 611         p_stream->i_headers += p_oggpacket->bytes + (b_store_size ? 2 : 0) + (b_store_num_headers ? 1 : 0);
 612
 613         if( !p_stream->b_force_backup )
 614         {
 615             /* Last header received, commit changes */
 616             p_stream->fmt.i_extra = p_stream->i_headers;
 617             p_stream->fmt.p_extra =
 618                 realloc( p_stream->fmt.p_extra, p_stream->i_headers );
 619             memcpy( p_stream->fmt.p_extra, p_stream->p_headers,
 620                     p_stream->i_headers );
 621
 622             if( Ogg_LogicalStreamResetEsFormat( p_demux, p_stream ) )
 623                 es_out_Control( p_demux->out, ES_OUT_SET_FMT,
 624                                 p_stream->p_es, &p_stream->fmt );
 625         }
 626
 627         b_selected = false; /* Discard the header packet */
 628     }
 629
 630     /* Convert the pcr into a pts */
 631     if( p_stream->fmt.i_codec == VLC_FOURCC( 'v','o','r','b' ) ||
 632         p_stream->fmt.i_codec == VLC_FOURCC( 's','p','x',' ' ) ||
 633         p_stream->fmt.i_codec == VLC_FOURCC( 'f','l','a','c' ) )
 634     {
 635         if( p_stream->i_pcr >= 0 )
 636         {
 637             /* This is for streams where the granulepos of the header packets
 638              * doesn't match these of the data packets (eg. ogg web radios). */
 639             if( p_stream->i_previous_pcr == 0 &&
 640                 p_stream->i_pcr  > 3 * DEFAULT_PTS_DELAY )
 641             {
 642                 es_out_Control( p_demux->out, ES_OUT_RESET_PCR );
 643
 644                 /* Call the pace control */
 645                 es_out_Control( p_demux->out, ES_OUT_SET_PCR,
 646                                 p_stream->i_pcr );
 647             }
 648
 649             p_stream->i_previous_pcr = p_stream->i_pcr;
 650
 651             /* The granulepos is the end date of the sample */
 652             i_pts =  p_stream->i_pcr;
 653         }
 654     }
 655
 656     /* Convert the granulepos into the next pcr */
 657     i_interpolated_pts = p_stream->i_interpolated_pcr;
 658     Ogg_UpdatePCR( p_stream, p_oggpacket );
 659
 660     if( p_stream->i_pcr >= 0 )
 661     {
 662         /* This is for streams where the granulepos of the header packets
 663          * doesn't match these of the data packets (eg. ogg web radios). */
 664         if( p_stream->i_previous_pcr == 0 &&
 665             p_stream->i_pcr  > 3 * DEFAULT_PTS_DELAY )
 666         {
 667             es_out_Control( p_demux->out, ES_OUT_RESET_PCR );
 668
 669             /* Call the pace control */
 670             es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_stream->i_pcr );
 671         }
 672     }
 673
 674     if( p_stream->fmt.i_codec != VLC_FOURCC( 'v','o','r','b' ) &&
 675         p_stream->fmt.i_codec != VLC_FOURCC( 's','p','x',' ' ) &&
 676         p_stream->fmt.i_codec != VLC_FOURCC( 'f','l','a','c' ) &&
 677         p_stream->i_pcr >= 0 )
 678     {
 679         p_stream->i_previous_pcr = p_stream->i_pcr;
 680
 681         /* The granulepos is the start date of the sample */
 682         i_pts = p_stream->i_pcr;
 683     }
 684
 685     if( !b_selected )
 686     {
 687         /* This stream isn't currently selected so we don't need to decode it,
 688          * but we did need to store its pcr as it might be selected later on */
 689         return;
 690     }
 691
 692     if( p_oggpacket->bytes <= 0 )
 693         return;
 694
 695     if( !( p_block = block_New( p_demux, p_oggpacket->bytes ) ) ) return;
 696
 697     /* Normalize PTS */
 698     if( i_pts == 0 ) i_pts = 1;
 699     else if( i_pts == -1 && i_interpolated_pts == 0 ) i_pts = 1;
 700     else if( i_pts == -1 ) i_pts = 0;
 701
 702     if( p_stream->fmt.i_cat == AUDIO_ES )
 703         p_block->i_dts = p_block->i_pts = i_pts;
 704     else if( p_stream->fmt.i_cat == SPU_ES )
 705     {
 706         p_block->i_dts = p_block->i_pts = i_pts;
 707         p_block->i_length = 0;
 708     }
 709     else if( p_stream->fmt.i_codec == VLC_FOURCC( 't','h','e','o' ) )
 710         p_block->i_dts = p_block->i_pts = i_pts;
 711     else if( p_stream->fmt.i_codec == VLC_FOURCC( 'd','r','a','c' ) )
 712     {
 713         ogg_int64_t dts = p_oggpacket->granulepos >> 31;
 714         ogg_int64_t delay = (p_oggpacket->granulepos >> 9) & 0x1fff;
 715
 716         uint64_t u_pnum = dts + delay;
 717
 718         p_block->i_dts = p_stream->i_pcr;
 719         p_block->i_pts = 0;
 720         /* NB, OggDirac granulepos values are in units of 2*picturerate */
 721         if( -1 != p_oggpacket->granulepos )
 722             p_block->i_pts = u_pnum * INT64_C(1000000) / p_stream->f_rate / 2;
 723     }
 724     else
 725     {
 726         p_block->i_dts = i_pts;
 727         p_block->i_pts = 0;
 728     }
 729
 730     if( p_stream->fmt.i_codec != VLC_FOURCC( 'v','o','r','b' ) &&
 731         p_stream->fmt.i_codec != VLC_FOURCC( 's','p','x',' ' ) &&
 732         p_stream->fmt.i_codec != VLC_FOURCC( 'f','l','a','c' ) &&
 733         p_stream->fmt.i_codec != VLC_FOURCC( 't','a','r','k' ) &&
 734         p_stream->fmt.i_codec != VLC_FOURCC( 't','h','e','o' ) &&
 735         p_stream->fmt.i_codec != VLC_FOURCC( 'c','m','m','l' ) &&
 736         p_stream->fmt.i_codec != VLC_FOURCC( 'd','r','a','c' ) &&
 737         p_stream->fmt.i_codec != VLC_FOURCC( 'k','a','t','e' ) )
 738     {
 739         /* We remove the header from the packet */
 740         i_header_len = (*p_oggpacket->packet & PACKET_LEN_BITS01) >> 6;
 741         i_header_len |= (*p_oggpacket->packet & PACKET_LEN_BITS2) << 1;
 742
 743         if( p_stream->fmt.i_codec == VLC_FOURCC( 's','u','b','t' ))
 744         {
 745             /* But with subtitles we need to retrieve the duration first */
 746             int i, lenbytes = 0;
 747
 748             if( i_header_len > 0 && p_oggpacket->bytes >= i_header_len + 1 )
 749             {
 750                 for( i = 0, lenbytes = 0; i < i_header_len; i++ )
 751                 {
 752                     lenbytes = lenbytes << 8;
 753                     lenbytes += *(p_oggpacket->packet + i_header_len - i);
 754                 }
 755             }
 756             if( p_oggpacket->bytes - 1 - i_header_len > 2 ||
 757                 ( p_oggpacket->packet[i_header_len + 1] != ' ' &&
 758                   p_oggpacket->packet[i_header_len + 1] != 0 &&
 759                   p_oggpacket->packet[i_header_len + 1] != '\n' &&
 760                   p_oggpacket->packet[i_header_len + 1] != '\r' ) )
 761             {
 762                 p_block->i_length = (mtime_t)lenbytes * 1000;
 763             }
 764         }
 765
 766         i_header_len++;
 767         if( p_block->i_buffer >= (unsigned int)i_header_len )
 768             p_block->i_buffer -= i_header_len;
 769         else
 770             p_block->i_buffer = 0;
 771     }
 772
 773     if( p_stream->fmt.i_codec == VLC_FOURCC( 't','a','r','k' ) )
 774     {
 775         /* FIXME: the biggest hack I've ever done */
 776         msg_Warn( p_demux, "tarkin pts: %"PRId64", granule: %"PRId64,
 777                   p_block->i_pts, p_block->i_dts );
 778         msleep(10000);
 779     }
 780
 781     memcpy( p_block->p_buffer, p_oggpacket->packet + i_header_len,
 782             p_oggpacket->bytes - i_header_len );
 783
 784     es_out_Send( p_demux->out, p_stream->p_es, p_block );
 785 }
 786
 787 /****************************************************************************
 788  * Ogg_FindLogicalStreams: Find the logical streams embedded in the physical
 789  *                         stream and fill p_ogg.
 790  *****************************************************************************
 791  * The initial page of a logical stream is marked as a 'bos' page.
 792  * Furthermore, the Ogg specification mandates that grouped bitstreams begin
 793  * together and all of the initial pages must appear before any data pages.
 794  *
 795  * On success this function returns VLC_SUCCESS.
 796  ****************************************************************************/
 797 static int Ogg_FindLogicalStreams( demux_t *p_demux )
 798 {
 799     demux_sys_t *p_ogg = p_demux->p_sys  ;
 800     ogg_packet oggpacket;
 801     ogg_page oggpage;
 802     int i_stream;
 803
 804 #define p_stream p_ogg->pp_stream[p_ogg->i_streams - 1]
 805
 806     while( Ogg_ReadPage( p_demux, &oggpage ) == VLC_SUCCESS )
 807     {
 808         if( ogg_page_bos( &oggpage ) )
 809         {
 810
 811             /* All is wonderful in our fine fine little world.
 812              * We found the beginning of our first logical stream. */
 813             while( ogg_page_bos( &oggpage ) )
 814             {
 815                 p_ogg->i_streams++;
 816                 p_ogg->pp_stream =
 817                     realloc( p_ogg->pp_stream, p_ogg->i_streams *
 818                              sizeof(logical_stream_t *) );
 819
 820                 p_stream = malloc( sizeof(logical_stream_t) );
 821                 memset( p_stream, 0, sizeof(logical_stream_t) );
 822                 p_stream->p_headers = 0;
 823                 p_stream->secondary_header_packets = 0;
 824
 825                 es_format_Init( &p_stream->fmt, 0, 0 );
 826                 es_format_Init( &p_stream->fmt_old, 0, 0 );
 827
 828                 /* Setup the logical stream */
 829                 p_stream->i_serial_no = ogg_page_serialno( &oggpage );
 830                 ogg_stream_init( &p_stream->os, p_stream->i_serial_no );
 831
 832                 /* Extract the initial header from the first page and verify
 833                  * the codec type of tis Ogg bitstream */
 834                 if( ogg_stream_pagein( &p_stream->os, &oggpage ) < 0 )
 835                 {
 836                     /* error. stream version mismatch perhaps */
 837                     msg_Err( p_demux, "error reading first page of "
 838                              "Ogg bitstream data" );
 839                     return VLC_EGENERIC;
 840                 }
 841
 842                 /* FIXME: check return value */
 843                 ogg_stream_packetpeek( &p_stream->os, &oggpacket );
 844
 845                 /* Check for Vorbis header */
 846                 if( oggpacket.bytes >= 7 &&
 847                     ! memcmp( oggpacket.packet, "\x01vorbis", 7 ) )
 848                 {
 849                     Ogg_ReadVorbisHeader( p_stream, &oggpacket );
 850                     msg_Dbg( p_demux, "found vorbis header" );
 851                 }
 852                 /* Check for Speex header */
 853                 else if( oggpacket.bytes >= 5 &&
 854                     ! memcmp( oggpacket.packet, "Speex", 5 ) )
 855                 {
 856                     Ogg_ReadSpeexHeader( p_stream, &oggpacket );
 857                     msg_Dbg( p_demux, "found speex header, channels: %i, "
 858                              "rate: %i,  bitrate: %i",
 859                              p_stream->fmt.audio.i_channels,
 860                              (int)p_stream->f_rate, p_stream->fmt.i_bitrate );
 861                 }
 862                 /* Check for Flac header (< version 1.1.1) */
 863                 else if( oggpacket.bytes >= 4 &&
 864                     ! memcmp( oggpacket.packet, "fLaC", 4 ) )
 865                 {
 866                     msg_Dbg( p_demux, "found FLAC header" );
 867
 868                     /* Grrrr!!!! Did they really have to put all the
 869                      * important info in the second header packet!!!
 870                      * (STREAMINFO metadata is in the following packet) */
 871                     p_stream->b_force_backup = 1;
 872
 873                     p_stream->fmt.i_cat = AUDIO_ES;
 874                     p_stream->fmt.i_codec = VLC_FOURCC( 'f','l','a','c' );
 875                 }
 876                 /* Check for Flac header (>= version 1.1.1) */
 877                 else if( oggpacket.bytes >= 13 && oggpacket.packet[0] ==0x7F &&
 878                     ! memcmp( &oggpacket.packet[1], "FLAC", 4 ) &&
 879                     ! memcmp( &oggpacket.packet[9], "fLaC", 4 ) )
 880                 {
 881                     int i_packets = ((int)oggpacket.packet[7]) << 8 |
 882                         oggpacket.packet[8];
 883                     msg_Dbg( p_demux, "found FLAC header version %i.%i "
 884                              "(%i header packets)",
 885                              oggpacket.packet[5], oggpacket.packet[6],
 886                              i_packets );
 887
 888                     p_stream->b_force_backup = 1;
 889
 890                     p_stream->fmt.i_cat = AUDIO_ES;
 891                     p_stream->fmt.i_codec = VLC_FOURCC( 'f','l','a','c' );
 892                     oggpacket.packet += 13; oggpacket.bytes -= 13;
 893                     Ogg_ReadFlacHeader( p_demux, p_stream, &oggpacket );
 894                 }
 895                 /* Check for Theora header */
 896                 else if( oggpacket.bytes >= 7 &&
 897                          ! memcmp( oggpacket.packet, "\x80theora", 7 ) )
 898                 {
 899                     Ogg_ReadTheoraHeader( p_stream, &oggpacket );
 900
 901                     msg_Dbg( p_demux,
 902                              "found theora header, bitrate: %i, rate: %f",
 903                              p_stream->fmt.i_bitrate, p_stream->f_rate );
 904                 }
 905                 /* Check for Dirac header */
 906                 else if( oggpacket.bytes >= 5 &&
 907                          ! memcmp( oggpacket.packet, "BBCD\x00", 5 ) )
 908                 {
 909                     Ogg_ReadDiracHeader( p_stream, &oggpacket );
 910                     msg_Dbg( p_demux, "found dirac header" );
 911                 }
 912                 /* Check for Tarkin header */
 913                 else if( oggpacket.bytes >= 7 &&
 914                          ! memcmp( &oggpacket.packet[1], "tarkin", 6 ) )
 915                 {
 916                     oggpack_buffer opb;
 917
 918                     msg_Dbg( p_demux, "found tarkin header" );
 919                     p_stream->fmt.i_cat = VIDEO_ES;
 920                     p_stream->fmt.i_codec = VLC_FOURCC( 't','a','r','k' );
 921
 922                     /* Cheat and get additionnal info ;) */
 923                     oggpack_readinit( &opb, oggpacket.packet, oggpacket.bytes);
 924                     oggpack_adv( &opb, 88 );
 925                     oggpack_adv( &opb, 104 );
 926                     p_stream->fmt.i_bitrate = oggpack_read( &opb, 32 );
 927                     p_stream->f_rate = 2; /* FIXME */
 928                     msg_Dbg( p_demux,
 929                              "found tarkin header, bitrate: %i, rate: %f",
 930                              p_stream->fmt.i_bitrate, p_stream->f_rate );
 931                 }
 932                 /* Check for Annodex header */
 933                 else if( oggpacket.bytes >= 7 &&
 934                          ! memcmp( oggpacket.packet, "Annodex", 7 ) )
 935                 {
 936                     Ogg_ReadAnnodexHeader( VLC_OBJECT(p_demux), p_stream,
 937                                            &oggpacket );
 938                     /* kill annodex track */
 939                     free( p_stream );
 940                     p_ogg->i_streams--;
 941                 }
 942                 /* Check for Annodex header */
 943                 else if( oggpacket.bytes >= 7 &&
 944                          ! memcmp( oggpacket.packet, "AnxData", 7 ) )
 945                 {
 946                     Ogg_ReadAnnodexHeader( VLC_OBJECT(p_demux), p_stream,
 947                                            &oggpacket );
 948                 }
 949                 /* Check for Kate header */
 950                 else if( oggpacket.bytes >= 8 &&
 951                     ! memcmp( &oggpacket.packet[1], "kate\0\0\0", 7 ) )
 952                 {
 953                     Ogg_ReadKateHeader( p_stream, &oggpacket );
 954                     msg_Dbg( p_demux, "found kate header" );
 955                 }
 956                 else if( oggpacket.bytes >= 142 &&
 957                          !memcmp( &oggpacket.packet[1],
 958                                    "Direct Show Samples embedded in Ogg", 35 ))
 959                 {
 960                     /* Old header type */
 961
 962                     /* Check for video header (old format) */
 963                     if( GetDWLE((oggpacket.packet+96)) == 0x05589f80 &&
 964                         oggpacket.bytes >= 184 )
 965                     {
 966                         p_stream->fmt.i_cat = VIDEO_ES;
 967                         p_stream->fmt.i_codec =
 968                             VLC_FOURCC( oggpacket.packet[68],
 969                                         oggpacket.packet[69],
 970                                         oggpacket.packet[70],
 971                                         oggpacket.packet[71] );
 972                         msg_Dbg( p_demux, "found video header of type: %.4s",
 973                                  (char *)&p_stream->fmt.i_codec );
 974
 975                         p_stream->fmt.video.i_frame_rate = 10000000;
 976                         p_stream->fmt.video.i_frame_rate_base =
 977                             GetQWLE((oggpacket.packet+164));
 978                         p_stream->f_rate = 10000000.0 /
 979                             GetQWLE((oggpacket.packet+164));
 980                         p_stream->fmt.video.i_bits_per_pixel =
 981                             GetWLE((oggpacket.packet+182));
 982                         if( !p_stream->fmt.video.i_bits_per_pixel )
 983                             /* hack, FIXME */
 984                             p_stream->fmt.video.i_bits_per_pixel = 24;
 985                         p_stream->fmt.video.i_width =
 986                             GetDWLE((oggpacket.packet+176));
 987                         p_stream->fmt.video.i_height =
 988                             GetDWLE((oggpacket.packet+180));
 989
 990                         msg_Dbg( p_demux,
 991                                  "fps: %f, width:%i; height:%i, bitcount:%i",
 992                                  p_stream->f_rate,
 993                                  p_stream->fmt.video.i_width,
 994                                  p_stream->fmt.video.i_height,
 995                                  p_stream->fmt.video.i_bits_per_pixel);
 996
 997                     }
 998                     /* Check for audio header (old format) */
 999                     else if( GetDWLE((oggpacket.packet+96)) == 0x05589F81 )
1000                     {
1001                         unsigned int i_extra_size;
1002                         unsigned int i_format_tag;
1003
1004                         p_stream->fmt.i_cat = AUDIO_ES;
1005
1006                         i_extra_size = GetWLE((oggpacket.packet+140));
1007                         if( i_extra_size )
1008                         {
1009                             p_stream->fmt.i_extra = i_extra_size;
1010                             p_stream->fmt.p_extra = malloc( i_extra_size );
1011                             memcpy( p_stream->fmt.p_extra,
1012                                     oggpacket.packet + 142, i_extra_size );
1013                         }
1014
1015                         i_format_tag = GetWLE((oggpacket.packet+124));
1016                         p_stream->fmt.audio.i_channels =
1017                             GetWLE((oggpacket.packet+126));
1018                         p_stream->f_rate = p_stream->fmt.audio.i_rate =
1019                             GetDWLE((oggpacket.packet+128));
1020                         p_stream->fmt.i_bitrate =
1021                             GetDWLE((oggpacket.packet+132)) * 8;
1022                         p_stream->fmt.audio.i_blockalign =
1023                             GetWLE((oggpacket.packet+136));
1024                         p_stream->fmt.audio.i_bitspersample =
1025                             GetWLE((oggpacket.packet+138));
1026
1027                         wf_tag_to_fourcc( i_format_tag,
1028                                           &p_stream->fmt.i_codec, 0 );
1029
1030                         if( p_stream->fmt.i_codec ==
1031                             VLC_FOURCC('u','n','d','f') )
1032                         {
1033                             p_stream->fmt.i_codec = VLC_FOURCC( 'm', 's',
1034                                 ( i_format_tag >> 8 ) & 0xff,
1035                                 i_format_tag & 0xff );
1036                         }
1037
1038                         msg_Dbg( p_demux, "found audio header of type: %.4s",
1039                                  (char *)&p_stream->fmt.i_codec );
1040                         msg_Dbg( p_demux, "audio:0x%4.4x channels:%d %dHz "
1041                                  "%dbits/sample %dkb/s",
1042                                  i_format_tag,
1043                                  p_stream->fmt.audio.i_channels,
1044                                  p_stream->fmt.audio.i_rate,
1045                                  p_stream->fmt.audio.i_bitspersample,
1046                                  p_stream->fmt.i_bitrate / 1024 );
1047
1048                     }
1049                     else
1050                     {
1051                         msg_Dbg( p_demux, "stream %d has an old header "
1052                             "but is of an unknown type", p_ogg->i_streams-1 );
1053                         free( p_stream );
1054                         p_ogg->i_streams--;
1055                     }
1056                 }
1057                 else if( (*oggpacket.packet & PACKET_TYPE_BITS )
1058                          == PACKET_TYPE_HEADER &&
1059                          oggpacket.bytes >= (int)sizeof(stream_header)+1 )
1060                 {
1061                     stream_header *st = (stream_header *)(oggpacket.packet+1);
1062
1063                     /* Check for video header (new format) */
1064                     if( !strncmp( st->streamtype, "video", 5 ) )
1065                     {
1066                         p_stream->fmt.i_cat = VIDEO_ES;
1067
1068                         /* We need to get rid of the header packet */
1069                         ogg_stream_packetout( &p_stream->os, &oggpacket );
1070
1071                         p_stream->fmt.i_codec =
1072                             VLC_FOURCC( st->subtype[0], st->subtype[1],
1073                                         st->subtype[2], st->subtype[3] );
1074                         msg_Dbg( p_demux, "found video header of type: %.4s",
1075                                  (char *)&p_stream->fmt.i_codec );
1076
1077                         p_stream->fmt.video.i_frame_rate = 10000000;
1078                         p_stream->fmt.video.i_frame_rate_base =
1079                             GetQWLE(&st->time_unit);
1080                         p_stream->f_rate = 10000000.0 /
1081                             GetQWLE(&st->time_unit);
1082                         p_stream->fmt.video.i_bits_per_pixel =
1083                             GetWLE(&st->bits_per_sample);
1084                         p_stream->fmt.video.i_width =
1085                             GetDWLE(&st->sh.video.width);
1086                         p_stream->fmt.video.i_height =
1087                             GetDWLE(&st->sh.video.height);
1088
1089                         msg_Dbg( p_demux,
1090                                  "fps: %f, width:%i; height:%i, bitcount:%i",
1091                                  p_stream->f_rate,
1092                                  p_stream->fmt.video.i_width,
1093                                  p_stream->fmt.video.i_height,
1094                                  p_stream->fmt.video.i_bits_per_pixel );
1095                     }
1096                     /* Check for audio header (new format) */
1097                     else if( !strncmp( st->streamtype, "audio", 5 ) )
1098                     {
1099                         char p_buffer[5];
1100                         int i_format_tag;
1101
1102                         p_stream->fmt.i_cat = AUDIO_ES;
1103
1104                         /* We need to get rid of the header packet */
1105                         ogg_stream_packetout( &p_stream->os, &oggpacket );
1106
1107                         p_stream->fmt.i_extra = GetQWLE(&st->size) -
1108                             sizeof(stream_header);
1109                         if( p_stream->fmt.i_extra )
1110                         {
1111                             p_stream->fmt.p_extra =
1112                                 malloc( p_stream->fmt.i_extra );
1113                             memcpy( p_stream->fmt.p_extra, st + 1,
1114                                     p_stream->fmt.i_extra );
1115                         }
1116
1117                         memcpy( p_buffer, st->subtype, 4 );
1118                         p_buffer[4] = '\0';
1119                         i_format_tag = strtol(p_buffer,NULL,16);
1120                         p_stream->fmt.audio.i_channels =
1121                             GetWLE(&st->sh.audio.channels);
1122                         p_stream->f_rate = p_stream->fmt.audio.i_rate =
1123                             GetQWLE(&st->samples_per_unit);
1124                         p_stream->fmt.i_bitrate =
1125                             GetDWLE(&st->sh.audio.avgbytespersec) * 8;
1126                         p_stream->fmt.audio.i_blockalign =
1127                             GetWLE(&st->sh.audio.blockalign);
1128                         p_stream->fmt.audio.i_bitspersample =
1129                             GetWLE(&st->bits_per_sample);
1130
1131                         wf_tag_to_fourcc( i_format_tag,
1132                                           &p_stream->fmt.i_codec, 0 );
1133
1134                         if( p_stream->fmt.i_codec ==
1135                             VLC_FOURCC('u','n','d','f') )
1136                         {
1137                             p_stream->fmt.i_codec = VLC_FOURCC( 'm', 's',
1138                                 ( i_format_tag >> 8 ) & 0xff,
1139                                 i_format_tag & 0xff );
1140                         }
1141
1142                         msg_Dbg( p_demux, "found audio header of type: %.4s",
1143                                  (char *)&p_stream->fmt.i_codec );
1144                         msg_Dbg( p_demux, "audio:0x%4.4x channels:%d %dHz "
1145                                  "%dbits/sample %dkb/s",
1146                                  i_format_tag,
1147                                  p_stream->fmt.audio.i_channels,
1148                                  p_stream->fmt.audio.i_rate,
1149                                  p_stream->fmt.audio.i_bitspersample,
1150                                  p_stream->fmt.i_bitrate / 1024 );
1151                     }
1152                     /* Check for text (subtitles) header */
1153                     else if( !strncmp(st->streamtype, "text", 4) )
1154                     {
1155                         /* We need to get rid of the header packet */
1156                         ogg_stream_packetout( &p_stream->os, &oggpacket );
1157
1158                         msg_Dbg( p_demux, "found text subtitles header" );
1159                         p_stream->fmt.i_cat = SPU_ES;
1160                         p_stream->fmt.i_codec = VLC_FOURCC('s','u','b','t');
1161                         p_stream->f_rate = 1000; /* granulepos is in milisec */
1162                     }
1163                     else
1164                     {
1165                         msg_Dbg( p_demux, "stream %d has a header marker "
1166                             "but is of an unknown type", p_ogg->i_streams-1 );
1167                         free( p_stream );
1168                         p_ogg->i_streams--;
1169                     }
1170                 }
1171                 else if( oggpacket.bytes >= 7 &&
1172                              ! memcmp( oggpacket.packet, "fishead", 7 ) )
1173
1174                 {
1175                     /* Skeleton */
1176                     msg_Dbg( p_demux, "stream %d is a skeleton",
1177                                 p_ogg->i_streams-1 );
1178                     /* FIXME: https://trac.videolan.org/vlc/ticket/1412 */
1179                 }
1180                 else
1181                 {
1182                     msg_Dbg( p_demux, "stream %d is of unknown type",
1183                              p_ogg->i_streams-1 );
1184                     free( p_stream );
1185                     p_ogg->i_streams--;
1186                 }
1187
1188                 if( Ogg_ReadPage( p_demux, &oggpage ) != VLC_SUCCESS )
1189                     return VLC_EGENERIC;
1190             }
1191
1192             /* This is the first data page, which means we are now finished
1193              * with the initial pages. We just need to store it in the relevant
1194              * bitstream. */
1195             for( i_stream = 0; i_stream < p_ogg->i_streams; i_stream++ )
1196             {
1197                 if( ogg_stream_pagein( &p_ogg->pp_stream[i_stream]->os,
1198                                        &oggpage ) == 0 )
1199                 {
1200                     break;
1201                 }
1202             }
1203
1204             return VLC_SUCCESS;
1205         }
1206     }
1207 #undef p_stream
1208
1209     return VLC_EGENERIC;
1210 }
1211
1212 /****************************************************************************
1213  * Ogg_BeginningOfStream: Look for Beginning of Stream ogg pages and add
1214  *                        Elementary streams.
1215  ****************************************************************************/
1216 static int Ogg_BeginningOfStream( demux_t *p_demux )
1217 {
1218     demux_sys_t *p_ogg = p_demux->p_sys  ;
1219     logical_stream_t *p_old_stream = p_ogg->p_old_stream;
1220     int i_stream;
1221
1222     /* Find the logical streams embedded in the physical stream and
1223      * initialize our p_ogg structure. */
1224     if( Ogg_FindLogicalStreams( p_demux ) != VLC_SUCCESS )
1225     {
1226         msg_Warn( p_demux, "couldn't find any ogg logical stream" );
1227         return VLC_EGENERIC;
1228     }
1229
1230     p_ogg->i_bitrate = 0;
1231
1232     for( i_stream = 0 ; i_stream < p_ogg->i_streams; i_stream++ )
1233     {
1234         logical_stream_t *p_stream = p_ogg->pp_stream[i_stream];
1235
1236         p_stream->p_es = NULL;
1237
1238         /* Try first to reuse an old ES */
1239         if( p_old_stream &&
1240             p_old_stream->fmt.i_cat == p_stream->fmt.i_cat &&
1241             p_old_stream->fmt.i_codec == p_stream->fmt.i_codec )
1242         {
1243             msg_Dbg( p_demux, "will reuse old stream to avoid glitch" );
1244
1245             p_stream->p_es = p_old_stream->p_es;
1246             es_format_Copy( &p_stream->fmt_old, &p_old_stream->fmt );
1247
1248             p_old_stream->p_es = NULL;
1249             p_old_stream = NULL;
1250         }
1251
1252         if( !p_stream->p_es )
1253             p_stream->p_es = es_out_Add( p_demux->out, &p_stream->fmt );
1254
1255         // TODO: something to do here ?
1256         if( p_stream->fmt.i_codec == VLC_FOURCC('c','m','m','l') )
1257         {
1258             /* Set the CMML stream active */
1259             es_out_Control( p_demux->out, ES_OUT_SET_ES, p_stream->p_es );
1260         }
1261
1262         p_ogg->i_bitrate += p_stream->fmt.i_bitrate;
1263
1264         p_stream->i_pcr = p_stream->i_previous_pcr =
1265             p_stream->i_interpolated_pcr = -1;
1266         p_stream->b_reinit = 0;
1267     }
1268
1269     if( p_ogg->p_old_stream )
1270     {
1271         if( p_ogg->p_old_stream->p_es )
1272             msg_Dbg( p_demux, "old stream not reused" );
1273         Ogg_LogicalStreamDelete( p_demux, p_ogg->p_old_stream );
1274         p_ogg->p_old_stream = NULL;
1275     }
1276     return VLC_SUCCESS;
1277 }
1278
1279 /****************************************************************************
1280  * Ogg_EndOfStream: clean up the ES when an End of Stream is detected.
1281  ****************************************************************************/
1282 static void Ogg_EndOfStream( demux_t *p_demux )
1283 {
1284     demux_sys_t *p_ogg = p_demux->p_sys  ;
1285     int i_stream;
1286
1287     for( i_stream = 0 ; i_stream < p_ogg->i_streams; i_stream++ )
1288         Ogg_LogicalStreamDelete( p_demux, p_ogg->pp_stream[i_stream] );
1289     free( p_ogg->pp_stream );
1290
1291     /* Reinit p_ogg */
1292     p_ogg->i_bitrate = 0;
1293     p_ogg->i_streams = 0;
1294     p_ogg->pp_stream = NULL;
1295 }
1296
1297 /**
1298  * This function delete and release all data associated to a logical_stream_t
1299  */
1300 static void Ogg_LogicalStreamDelete( demux_t *p_demux, logical_stream_t *p_stream )
1301 {
1302     if( p_stream->p_es )
1303         es_out_Del( p_demux->out, p_stream->p_es );
1304
1305     ogg_stream_clear( &p_stream->os );
1306     free( p_stream->p_headers );
1307
1308     es_format_Clean( &p_stream->fmt_old );
1309     es_format_Clean( &p_stream->fmt );
1310
1311     free( p_stream );
1312 }
1313 /**
1314  * This function check if a we need to reset a decoder in case we are
1315  * reusing an old ES
1316  */
1317 static bool Ogg_IsVorbisFormatCompatible( const es_format_t *p_new, const es_format_t *p_old )
1318 {
1319     int i_new = 0;
1320     int i_old = 0;
1321     int i;
1322
1323     for( i = 0; i < 3; i++ )
1324     {
1325         const uint8_t *p_new_extra = ( const uint8_t*)p_new->p_extra + i_new;
1326         const uint8_t *p_old_extra = ( const uint8_t*)p_old->p_extra + i_old;
1327
1328         if( p_new->i_extra < i_new+2 || p_old->i_extra < i_old+2 )
1329             return false;
1330
1331         const int i_new_size = GetWBE( &p_new_extra[0] );
1332         const int i_old_size = GetWBE( &p_old_extra[0] );
1333
1334         if( i != 1 ) /* Ignore vorbis comment */
1335         {
1336             if( i_new_size != i_old_size )
1337                 return false;
1338             if( memcmp( &p_new_extra[2], &p_old_extra[2], i_new_size ) )
1339                 return false;
1340         }
1341
1342         i_new += 2 + i_new_size;
1343         i_old += 2 + i_old_size;
1344     }
1345     return true;
1346 }
1347 static bool Ogg_LogicalStreamResetEsFormat( demux_t *p_demux, logical_stream_t *p_stream )
1348 {
1349     bool b_compatible;
1350     if( !p_stream->fmt_old.i_cat || !p_stream->fmt_old.i_codec )
1351         return true;
1352
1353     /* Only vorbis is supported */
1354     if( p_stream->fmt.i_codec == VLC_FOURCC( 'v','o','r','b' ) )
1355         b_compatible = Ogg_IsVorbisFormatCompatible( &p_stream->fmt, &p_stream->fmt_old );
1356
1357     if( !b_compatible )
1358         msg_Warn( p_demux, "cannot reuse old stream, resetting the decoder" );
1359
1360     return !b_compatible;
1361 }
1362
1363 static void Ogg_ReadTheoraHeader( logical_stream_t *p_stream,
1364                                   ogg_packet *p_oggpacket )
1365 {
1366     bs_t bitstream;
1367     int i_fps_numerator;
1368     int i_fps_denominator;
1369     int i_keyframe_frequency_force;
1370
1371     p_stream->fmt.i_cat = VIDEO_ES;
1372     p_stream->fmt.i_codec = VLC_FOURCC( 't','h','e','o' );
1373
1374     /* Signal that we want to keep a backup of the theora
1375      * stream headers. They will be used when switching between
1376      * audio streams. */
1377     p_stream->b_force_backup = 1;
1378
1379     /* Cheat and get additionnal info ;) */
1380     bs_init( &bitstream, p_oggpacket->packet, p_oggpacket->bytes );
1381     bs_skip( &bitstream, 56 );
1382     bs_read( &bitstream, 8 ); /* major version num */
1383     bs_read( &bitstream, 8 ); /* minor version num */
1384     bs_read( &bitstream, 8 ); /* subminor version num */
1385     bs_read( &bitstream, 16 ) /*<< 4*/; /* width */
1386     bs_read( &bitstream, 16 ) /*<< 4*/; /* height */
1387     bs_read( &bitstream, 24 ); /* frame width */
1388     bs_read( &bitstream, 24 ); /* frame height */
1389     bs_read( &bitstream, 8 ); /* x offset */
1390     bs_read( &bitstream, 8 ); /* y offset */
1391
1392     i_fps_numerator = bs_read( &bitstream, 32 );
1393     i_fps_denominator = bs_read( &bitstream, 32 );
1394     bs_read( &bitstream, 24 ); /* aspect_numerator */
1395     bs_read( &bitstream, 24 ); /* aspect_denominator */
1396
1397     p_stream->fmt.video.i_frame_rate = i_fps_numerator;
1398     p_stream->fmt.video.i_frame_rate_base = i_fps_denominator;
1399
1400     bs_read( &bitstream, 8 ); /* colorspace */
1401     p_stream->fmt.i_bitrate = bs_read( &bitstream, 24 );
1402     bs_read( &bitstream, 6 ); /* quality */
1403
1404     i_keyframe_frequency_force = 1 << bs_read( &bitstream, 5 );
1405
1406     /* granule_shift = i_log( frequency_force -1 ) */
1407     p_stream->i_granule_shift = 0;
1408     i_keyframe_frequency_force--;
1409     while( i_keyframe_frequency_force )
1410     {
1411         p_stream->i_granule_shift++;
1412         i_keyframe_frequency_force >>= 1;
1413     }
1414
1415     p_stream->f_rate = ((float)i_fps_numerator) / i_fps_denominator;
1416 }
1417
1418 static void Ogg_ReadVorbisHeader( logical_stream_t *p_stream,
1419                                   ogg_packet *p_oggpacket )
1420 {
1421     oggpack_buffer opb;
1422
1423     p_stream->fmt.i_cat = AUDIO_ES;
1424     p_stream->fmt.i_codec = VLC_FOURCC( 'v','o','r','b' );
1425
1426     /* Signal that we want to keep a backup of the vorbis
1427      * stream headers. They will be used when switching between
1428      * audio streams. */
1429     p_stream->b_force_backup = 1;
1430
1431     /* Cheat and get additionnal info ;) */
1432     oggpack_readinit( &opb, p_oggpacket->packet, p_oggpacket->bytes);
1433     oggpack_adv( &opb, 88 );
1434     p_stream->fmt.audio.i_channels = oggpack_read( &opb, 8 );
1435     p_stream->f_rate = p_stream->fmt.audio.i_rate =
1436         oggpack_read( &opb, 32 );
1437     oggpack_adv( &opb, 32 );
1438     p_stream->fmt.i_bitrate = oggpack_read( &opb, 32 );
1439 }
1440
1441 static void Ogg_ReadSpeexHeader( logical_stream_t *p_stream,
1442                                  ogg_packet *p_oggpacket )
1443 {
1444     oggpack_buffer opb;
1445
1446     p_stream->fmt.i_cat = AUDIO_ES;
1447     p_stream->fmt.i_codec = VLC_FOURCC( 's','p','x',' ' );
1448
1449     /* Signal that we want to keep a backup of the speex
1450      * stream headers. They will be used when switching between
1451      * audio streams. */
1452     p_stream->b_force_backup = 1;
1453
1454     /* Cheat and get additionnal info ;) */
1455     oggpack_readinit( &opb, p_oggpacket->packet, p_oggpacket->bytes);
1456     oggpack_adv( &opb, 224 );
1457     oggpack_adv( &opb, 32 ); /* speex_version_id */
1458     oggpack_adv( &opb, 32 ); /* header_size */
1459     p_stream->f_rate = p_stream->fmt.audio.i_rate = oggpack_read( &opb, 32 );
1460     oggpack_adv( &opb, 32 ); /* mode */
1461     oggpack_adv( &opb, 32 ); /* mode_bitstream_version */
1462     p_stream->fmt.audio.i_channels = oggpack_read( &opb, 32 );
1463     p_stream->fmt.i_bitrate = oggpack_read( &opb, 32 );
1464 }
1465
1466 static void Ogg_ReadFlacHeader( demux_t *p_demux, logical_stream_t *p_stream,
1467                                 ogg_packet *p_oggpacket )
1468 {
1469     /* Parse the STREAMINFO metadata */
1470     bs_t s;
1471
1472     bs_init( &s, p_oggpacket->packet, p_oggpacket->bytes );
1473
1474     bs_read( &s, 1 );
1475     if( bs_read( &s, 7 ) == 0 )
1476     {
1477         if( bs_read( &s, 24 ) >= 34 /*size STREAMINFO*/ )
1478         {
1479             bs_skip( &s, 80 );
1480             p_stream->f_rate = p_stream->fmt.audio.i_rate = bs_read( &s, 20 );
1481             p_stream->fmt.audio.i_channels = bs_read( &s, 3 ) + 1;
1482
1483             msg_Dbg( p_demux, "FLAC header, channels: %i, rate: %i",
1484                      p_stream->fmt.audio.i_channels, (int)p_stream->f_rate );
1485         }
1486         else msg_Dbg( p_demux, "FLAC STREAMINFO metadata too short" );
1487
1488         /* Fake this as the last metadata block */
1489         *((uint8_t*)p_oggpacket->packet) |= 0x80;
1490     }
1491     else
1492     {
1493         /* This ain't a STREAMINFO metadata */
1494         msg_Dbg( p_demux, "Invalid FLAC STREAMINFO metadata" );
1495     }
1496 }
1497
1498 static void Ogg_ReadKateHeader( logical_stream_t *p_stream,
1499                                 ogg_packet *p_oggpacket )
1500 {
1501     oggpack_buffer opb;
1502     int32_t gnum;
1503     int32_t gden;
1504     int n;
1505
1506     p_stream->fmt.i_cat = SPU_ES;
1507     p_stream->fmt.i_codec = VLC_FOURCC( 'k','a','t','e' );
1508
1509     /* Signal that we want to keep a backup of the kate
1510      * stream headers. They will be used when switching between
1511      * kate streams. */
1512     p_stream->b_force_backup = 1;
1513
1514     /* Cheat and get additionnal info ;) */
1515     oggpack_readinit( &opb, p_oggpacket->packet, p_oggpacket->bytes);
1516     oggpack_adv( &opb, 11*8 ); /* packet type, kate magic, version */
1517     p_stream->i_kate_num_headers = oggpack_read( &opb, 8 );
1518     oggpack_adv( &opb, 3*8 );
1519     p_stream->i_granule_shift = oggpack_read( &opb, 8 );
1520     oggpack_adv( &opb, 8*8 ); /* reserved */
1521     gnum = oggpack_read( &opb, 32 );
1522     gden = oggpack_read( &opb, 32 );
1523     p_stream->f_rate = (double)gnum/gden;
1524
1525     p_stream->fmt.psz_language = malloc(16);
1526     if (p_stream->fmt.psz_language)
1527     {
1528         for (n=0;n<16;++n)
1529             p_stream->fmt.psz_language[n] = oggpack_read(&opb,8);
1530         p_stream->fmt.psz_language[15] = 0; /* just in case */
1531     }
1532     else
1533     {
1534         for (n=0;n<16;++n)
1535             oggpack_read(&opb,8);
1536     }
1537     p_stream->fmt.psz_description = malloc(16);
1538     if (p_stream->fmt.psz_description)
1539     {
1540         for (n=0;n<16;++n)
1541             p_stream->fmt.psz_description[n] = oggpack_read(&opb,8);
1542         p_stream->fmt.psz_description[15] = 0; /* just in case */
1543     }
1544     else
1545     {
1546         for (n=0;n<16;++n)
1547             oggpack_read(&opb,8);
1548     }
1549 }
1550
1551 static void Ogg_ReadAnnodexHeader( vlc_object_t *p_this,
1552                                    logical_stream_t *p_stream,
1553                                    ogg_packet *p_oggpacket )
1554 {
1555     if( p_oggpacket->bytes >= 28 &&
1556         !memcmp( p_oggpacket->packet, "Annodex", 7 ) )
1557     {
1558         oggpack_buffer opb;
1559
1560         uint16_t major_version;
1561         uint16_t minor_version;
1562         uint64_t timebase_numerator;
1563         uint64_t timebase_denominator;
1564
1565         Ogg_ReadTheoraHeader( p_stream, p_oggpacket );
1566
1567         oggpack_readinit( &opb, p_oggpacket->packet, p_oggpacket->bytes);
1568         oggpack_adv( &opb, 8*8 ); /* "Annodex\0" header */
1569         major_version = oggpack_read( &opb, 2*8 ); /* major version */
1570         minor_version = oggpack_read( &opb, 2*8 ); /* minor version */
1571         timebase_numerator = GetQWLE( &p_oggpacket->packet[16] );
1572         timebase_denominator = GetQWLE( &p_oggpacket->packet[24] );
1573     }
1574     else if( p_oggpacket->bytes >= 42 &&
1575              !memcmp( p_oggpacket->packet, "AnxData", 7 ) )
1576     {
1577         uint64_t granule_rate_numerator;
1578         uint64_t granule_rate_denominator;
1579         char content_type_string[1024];
1580
1581         /* Read in Annodex header fields */
1582
1583         granule_rate_numerator = GetQWLE( &p_oggpacket->packet[8] );
1584         granule_rate_denominator = GetQWLE( &p_oggpacket->packet[16] );
1585         p_stream->secondary_header_packets =
1586             GetDWLE( &p_oggpacket->packet[24] );
1587
1588         /* we are guaranteed that the first header field will be
1589          * the content-type (by the Annodex standard) */
1590         content_type_string[0] = '\0';
1591         if( !strncasecmp( (char*)(&p_oggpacket->packet[28]), "Content-Type: ", 14 ) )
1592         {
1593             uint8_t *p = memchr( &p_oggpacket->packet[42], '\r',
1594                                  p_oggpacket->bytes - 1 );
1595             if( p && p[0] == '\r' && p[1] == '\n' )
1596                 sscanf( (char*)(&p_oggpacket->packet[42]), "%1024s\r\n",
1597                         content_type_string );
1598         }
1599
1600         msg_Dbg( p_this, "AnxData packet info: %"PRId64" / %"PRId64", %d, ``%s''",
1601                  granule_rate_numerator, granule_rate_denominator,
1602                  p_stream->secondary_header_packets, content_type_string );
1603
1604         p_stream->f_rate = (float) granule_rate_numerator /
1605             (float) granule_rate_denominator;
1606
1607         /* What type of file do we have?
1608          * strcmp is safe to use here because we've extracted
1609          * content_type_string from the stream manually */
1610         if( !strncmp(content_type_string, "audio/x-wav", 11) )
1611         {
1612             /* n.b. WAVs are unsupported right now */
1613             p_stream->fmt.i_cat = UNKNOWN_ES;
1614         }
1615         else if( !strncmp(content_type_string, "audio/x-vorbis", 14) )
1616         {
1617             p_stream->fmt.i_cat = AUDIO_ES;
1618             p_stream->fmt.i_codec = VLC_FOURCC( 'v','o','r','b' );
1619
1620             p_stream->b_force_backup = 1;
1621         }
1622         else if( !strncmp(content_type_string, "audio/x-speex", 14) )
1623         {
1624             p_stream->fmt.i_cat = AUDIO_ES;
1625             p_stream->fmt.i_codec = VLC_FOURCC( 's','p','x',' ' );
1626
1627             p_stream->b_force_backup = 1;
1628         }
1629         else if( !strncmp(content_type_string, "video/x-theora", 14) )
1630         {
1631             p_stream->fmt.i_cat = VIDEO_ES;
1632             p_stream->fmt.i_codec = VLC_FOURCC( 't','h','e','o' );
1633
1634             p_stream->b_force_backup = 1;
1635         }
1636         else if( !strncmp(content_type_string, "video/x-xvid", 14) )
1637         {
1638             p_stream->fmt.i_cat = VIDEO_ES;
1639             p_stream->fmt.i_codec = VLC_FOURCC( 'x','v','i','d' );
1640
1641             p_stream->b_force_backup = 1;
1642         }
1643         else if( !strncmp(content_type_string, "video/mpeg", 14) )
1644         {
1645             /* n.b. MPEG streams are unsupported right now */
1646             p_stream->fmt.i_cat = VIDEO_ES;
1647             p_stream->fmt.i_codec = VLC_FOURCC( 'm','p','g','v' );
1648         }
1649         else if( !strncmp(content_type_string, "text/x-cmml", 11) )
1650         {
1651             ogg_stream_packetout( &p_stream->os, p_oggpacket );
1652             p_stream->fmt.i_cat = SPU_ES;
1653             p_stream->fmt.i_codec = VLC_FOURCC( 'c','m','m','l' );
1654         }
1655     }
1656 }
1657
1658 static uint32_t dirac_uint( bs_t *p_bs )
1659 {
1660   uint32_t count = 0, value = 0;
1661   while( !bs_read ( p_bs, 1 ) ) {
1662     count++;
1663     value <<= 1;
1664     value |= bs_read ( p_bs, 1 );
1665   }
1666
1667   return (1<<count) - 1 + value;
1668 }
1669
1670 static int dirac_bool( bs_t *p_bs )
1671 {
1672     return bs_read ( p_bs, 1 );
1673 }
1674
1675 static void Ogg_ReadDiracHeader( logical_stream_t *p_stream,
1676                                  ogg_packet *p_oggpacket )
1677 {
1678     bs_t bs;
1679
1680     p_stream->fmt.i_cat = VIDEO_ES;
1681     p_stream->fmt.i_codec = VLC_FOURCC( 'd','r','a','c' );
1682     p_stream->i_granule_shift = 32;
1683
1684     /* Backing up stream headers is not required -- seqhdrs are repeated
1685      * thoughout the stream at suitable decoding start points */
1686     p_stream->b_force_backup = 0;
1687
1688     /* read in useful bits from sequence header */
1689     bs_init( &bs, p_oggpacket->packet, p_oggpacket->bytes );
1690     bs_skip( &bs, 13*8); /* parse_info_header */
1691     dirac_uint( &bs ); /* major_version */
1692     dirac_uint( &bs ); /* minor_version */
1693     dirac_uint( &bs ); /* profile */
1694     dirac_uint( &bs ); /* level */
1695
1696     uint32_t u_video_format = dirac_uint( &bs ); /* index */
1697
1698     if (dirac_bool( &bs )) {
1699         dirac_uint( &bs ); /* frame_width */
1700         dirac_uint( &bs ); /* frame_height */
1701     }
1702
1703     if (dirac_bool( &bs )) {
1704         dirac_uint( &bs ); /* chroma_format */
1705     }
1706     if (dirac_bool( &bs )) {
1707         if (dirac_bool( &bs )) { /* interlaced */
1708             dirac_bool( &bs ); /* top_field_first */
1709         }
1710     }
1711
1712     static const struct {
1713         uint32_t u_n /* numerator */, u_d /* denominator */;
1714     } dirac_frate_tbl[] = { /* table 10.3 */
1715         {1,1}, /* this first value is never used */
1716         {24000,1001}, {24,1}, {25,1}, {30000,1001}, {30,1},
1717         {50,1}, {60000,1001}, {60,1}, {15000,1001}, {25,2},
1718     };
1719
1720     static const uint32_t dirac_vidfmt_frate[] = { /* table C.1 */
1721         1, 9, 10, 9, 10, 9, 10, 4, 3, 7, 6, 4, 3, 7, 6, 2, 2, 7, 6, 7, 6,
1722     };
1723
1724     uint32_t u_n = dirac_frate_tbl[dirac_vidfmt_frate[u_video_format]].u_n;
1725     uint32_t u_d = dirac_frate_tbl[dirac_vidfmt_frate[u_video_format]].u_d;
1726     if (dirac_bool( &bs )) {
1727         uint32_t frame_rate_index = dirac_uint( &bs );
1728         u_n = dirac_frate_tbl[frame_rate_index].u_n;
1729         u_d = dirac_frate_tbl[frame_rate_index].u_d;
1730         if (frame_rate_index == 0) {
1731             u_n = dirac_uint( &bs ); /* frame_rate_numerator */
1732             u_d = dirac_uint( &bs ); /* frame_rate_denominator */
1733         }
1734     }
1735     p_stream->f_rate = (float) u_n / u_d;
1736 }