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

   1 /*****************************************************************************
   2  * ogg.c: ogg muxer module for vlc
   3  *****************************************************************************
   4  * Copyright (C) 2001, 2002, 2006 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Laurent Aimar <fenrir@via.ecp.fr>
   8  *          Gildas Bazin <gbazin@videolan.org>
   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
  29 #ifdef HAVE_CONFIG_H
  30 # include "config.h"
  31 #endif
  32
  33 #include <vlc_common.h>
  34 #include <vlc_plugin.h>
  35 #include <vlc_sout.h>
  36 #include <vlc_block.h>
  37 #include <vlc_codecs.h>
  38 #include <limits.h>
  39 #include <vlc_rand.h>
  40 #include "../demux/xiph.h"
  41
  42 #include <ogg/ogg.h>
  43
  44 /*****************************************************************************
  45  * Module descriptor
  46  *****************************************************************************/
  47 static int  Open   ( vlc_object_t * );
  48 static void Close  ( vlc_object_t * );
  49
  50 vlc_module_begin ()
  51     set_description( N_("Ogg/OGM muxer") )
  52     set_capability( "sout mux", 10 )
  53     set_category( CAT_SOUT )
  54     set_subcategory( SUBCAT_SOUT_MUX )
  55     add_shortcut( "ogg" )
  56     add_shortcut( "ogm" )
  57     set_callbacks( Open, Close )
  58 vlc_module_end ()
  59
  60
  61 /*****************************************************************************
  62  * Exported prototypes
  63  *****************************************************************************/
  64 static int Control  ( sout_mux_t *, int, va_list );
  65 static int AddStream( sout_mux_t *, sout_input_t * );
  66 static int DelStream( sout_mux_t *, sout_input_t * );
  67 static int Mux      ( sout_mux_t * );
  68 static int MuxBlock ( sout_mux_t *, sout_input_t * );
  69
  70 static block_t *OggCreateHeader( sout_mux_t * );
  71 static block_t *OggCreateFooter( sout_mux_t * );
  72
  73 /*****************************************************************************
  74  * Misc declarations
  75  *****************************************************************************/
  76
  77 /* Structures used for OggDS headers used in ogm files */
  78
  79 #define PACKET_TYPE_HEADER   0x01
  80 #define PACKET_TYPE_COMMENT  0x03
  81 #define PACKET_IS_SYNCPOINT  0x08
  82
  83 typedef struct
  84 #ifdef HAVE_ATTRIBUTE_PACKED
  85     __attribute__((__packed__))
  86 #endif
  87 {
  88     int32_t i_width;
  89     int32_t i_height;
  90 } oggds_header_video_t;
  91
  92 typedef struct
  93 #ifdef HAVE_ATTRIBUTE_PACKED
  94     __attribute__((__packed__))
  95 #endif
  96 {
  97     int16_t i_channels;
  98     int16_t i_block_align;
  99     int32_t i_avgbytespersec;
 100 } oggds_header_audio_t;
 101
 102 typedef struct
 103 #ifdef HAVE_ATTRIBUTE_PACKED
 104     __attribute__((__packed__))
 105 #endif
 106 {
 107     uint8_t i_packet_type;
 108
 109     char stream_type[8];
 110     char sub_type[4];
 111
 112     int32_t i_size;
 113
 114     int64_t i_time_unit;
 115     int64_t i_samples_per_unit;
 116     int32_t i_default_len;
 117
 118     int32_t i_buffer_size;
 119     int16_t i_bits_per_sample;
 120
 121     int16_t i_padding_0; /* Because the original is using MSVC packing style */
 122
 123     union
 124     {
 125         oggds_header_video_t video;
 126         oggds_header_audio_t audio;
 127     } header;
 128
 129     int32_t i_padding_1; /* Because the original is using MSVC packing style */
 130
 131 } oggds_header_t;
 132
 133 /*****************************************************************************
 134  * Definitions of structures and functions used by this plugins
 135  *****************************************************************************/
 136 typedef struct
 137 {
 138     int i_cat;
 139     int i_fourcc;
 140
 141     int b_new;
 142
 143     mtime_t i_dts;
 144     mtime_t i_length;
 145     int     i_packet_no;
 146     int     i_serial_no;
 147     int     i_keyframe_granule_shift; /* Theora only */
 148     int     i_last_keyframe; /* dirac and theora */
 149     int     i_num_frames; /* Theora only */
 150     uint64_t u_last_granulepos; /* Used for correct EOS page */
 151     int64_t i_num_keyframes;
 152     ogg_stream_state os;
 153
 154     oggds_header_t *p_oggds_header;
 155
 156 } ogg_stream_t;
 157
 158 struct sout_mux_sys_t
 159 {
 160     int     i_streams;
 161
 162     mtime_t i_start_dts;
 163     int     i_next_serial_no;
 164
 165     /* number of logical streams pending to be added */
 166     int i_add_streams;
 167
 168     /* logical streams pending to be deleted */
 169     int i_del_streams;
 170     ogg_stream_t **pp_del_streams;
 171 };
 172
 173 static void OggSetDate( block_t *, mtime_t , mtime_t  );
 174 static block_t *OggStreamFlush( sout_mux_t *, ogg_stream_state *, mtime_t );
 175
 176 /*****************************************************************************
 177  * Open: Open muxer
 178  *****************************************************************************/
 179 static int Open( vlc_object_t *p_this )
 180 {
 181     sout_mux_t      *p_mux = (sout_mux_t*)p_this;
 182     sout_mux_sys_t  *p_sys;
 183
 184     msg_Info( p_mux, "Open" );
 185
 186     p_sys                 = malloc( sizeof( sout_mux_sys_t ) );
 187     if( !p_sys )
 188         return VLC_ENOMEM;
 189     p_sys->i_streams      = 0;
 190     p_sys->i_add_streams  = 0;
 191     p_sys->i_del_streams  = 0;
 192     p_sys->pp_del_streams = 0;
 193
 194     p_mux->p_sys        = p_sys;
 195     p_mux->pf_control   = Control;
 196     p_mux->pf_addstream = AddStream;
 197     p_mux->pf_delstream = DelStream;
 198     p_mux->pf_mux       = Mux;
 199
 200     /* First serial number is random.
 201      * (Done like this because on win32 you need to seed the random number
 202      *  generator once per thread). */
 203     uint32_t r;
 204     vlc_rand_bytes(&r, sizeof(r));
 205     p_sys->i_next_serial_no = r & INT_MAX;
 206
 207     return VLC_SUCCESS;
 208 }
 209
 210 /*****************************************************************************
 211  * Close: Finalize ogg bitstream and close muxer
 212  *****************************************************************************/
 213 static void Close( vlc_object_t * p_this )
 214 {
 215     sout_mux_t     *p_mux = (sout_mux_t*)p_this;
 216     sout_mux_sys_t *p_sys = p_mux->p_sys;
 217
 218     msg_Info( p_mux, "Close" );
 219
 220     if( p_sys->i_del_streams )
 221     {
 222         block_t *p_og = NULL;
 223         mtime_t i_dts = p_sys->pp_del_streams[p_sys->i_del_streams - 1]->i_dts;
 224
 225         /* Close the current ogg stream */
 226         msg_Dbg( p_mux, "writing footer" );
 227         block_ChainAppend( &p_og, OggCreateFooter( p_mux ) );
 228
 229         /* Remove deleted logical streams */
 230         for(int i = 0; i < p_sys->i_del_streams; i++ )
 231         {
 232             ogg_stream_clear( &p_sys->pp_del_streams[i]->os );
 233             FREENULL( p_sys->pp_del_streams[i]->p_oggds_header );
 234             FREENULL( p_sys->pp_del_streams[i] );
 235         }
 236         FREENULL( p_sys->pp_del_streams );
 237         p_sys->i_streams -= p_sys->i_del_streams;
 238
 239         /* Write footer */
 240         OggSetDate( p_og, i_dts, 0 );
 241         sout_AccessOutWrite( p_mux->p_access, p_og );
 242     }
 243
 244     free( p_sys );
 245 }
 246
 247 /*****************************************************************************
 248  * Control:
 249  *****************************************************************************/
 250 static int Control( sout_mux_t *p_mux, int i_query, va_list args )
 251 {
 252     VLC_UNUSED(p_mux);
 253     bool *pb_bool;
 254     char **ppsz;
 255
 256    switch( i_query )
 257    {
 258        case MUX_CAN_ADD_STREAM_WHILE_MUXING:
 259            pb_bool = (bool*)va_arg( args, bool * );
 260            *pb_bool = true;
 261            return VLC_SUCCESS;
 262
 263        case MUX_GET_ADD_STREAM_WAIT:
 264            pb_bool = (bool*)va_arg( args, bool * );
 265            *pb_bool = true;
 266            return VLC_SUCCESS;
 267
 268        case MUX_GET_MIME:
 269            ppsz = (char**)va_arg( args, char ** );
 270            *ppsz = strdup( "application/ogg" );
 271            return VLC_SUCCESS;
 272
 273         default:
 274             return VLC_EGENERIC;
 275    }
 276 }
 277 /*****************************************************************************
 278  * AddStream: Add an elementary stream to the muxed stream
 279  *****************************************************************************/
 280 static int AddStream( sout_mux_t *p_mux, sout_input_t *p_input )
 281 {
 282     sout_mux_sys_t *p_sys = p_mux->p_sys;
 283     ogg_stream_t   *p_stream;
 284     uint16_t i_tag;
 285
 286     msg_Dbg( p_mux, "adding input" );
 287
 288     p_input->p_sys = p_stream = calloc( 1, sizeof( ogg_stream_t ) );
 289     if( !p_stream )
 290         return VLC_ENOMEM;
 291
 292     p_stream->i_cat       = p_input->p_fmt->i_cat;
 293     p_stream->i_fourcc    = p_input->p_fmt->i_codec;
 294     p_stream->i_serial_no = p_sys->i_next_serial_no++;
 295     p_stream->i_packet_no = 0;
 296     p_stream->i_last_keyframe = 0;
 297     p_stream->i_num_keyframes = 0;
 298     p_stream->i_num_frames = 0;
 299
 300     p_stream->p_oggds_header = 0;
 301
 302     switch( p_input->p_fmt->i_cat )
 303     {
 304     case VIDEO_ES:
 305         if( !p_input->p_fmt->video.i_frame_rate ||
 306             !p_input->p_fmt->video.i_frame_rate_base )
 307         {
 308             msg_Warn( p_mux, "Missing frame rate, assuming 25fps" );
 309             p_input->p_fmt->video.i_frame_rate = 25;
 310             p_input->p_fmt->video.i_frame_rate_base = 1;
 311         }
 312
 313         switch( p_stream->i_fourcc )
 314         {
 315         case VLC_CODEC_MP4V:
 316         case VLC_CODEC_MPGV:
 317         case VLC_CODEC_DIV3:
 318         case VLC_CODEC_MJPG:
 319         case VLC_CODEC_WMV1:
 320         case VLC_CODEC_WMV2:
 321         case VLC_CODEC_WMV3:
 322         case VLC_CODEC_SNOW:
 323             p_stream->p_oggds_header = calloc( 1, sizeof(oggds_header_t) );
 324             if( !p_stream->p_oggds_header )
 325             {
 326                 free( p_stream );
 327                 return VLC_ENOMEM;
 328             }
 329             p_stream->p_oggds_header->i_packet_type = PACKET_TYPE_HEADER;
 330
 331             memcpy( p_stream->p_oggds_header->stream_type, "video", 5 );
 332             if( p_stream->i_fourcc == VLC_CODEC_MP4V )
 333             {
 334                 memcpy( p_stream->p_oggds_header->sub_type, "XVID", 4 );
 335             }
 336             else if( p_stream->i_fourcc == VLC_CODEC_DIV3 )
 337             {
 338                 memcpy( p_stream->p_oggds_header->sub_type, "DIV3", 4 );
 339             }
 340             else
 341             {
 342                 memcpy( p_stream->p_oggds_header->sub_type,
 343                         &p_stream->i_fourcc, 4 );
 344             }
 345             SetDWLE( &p_stream->p_oggds_header->i_size,
 346                      sizeof( oggds_header_t ) - 1 );
 347             SetQWLE( &p_stream->p_oggds_header->i_time_unit,
 348                      INT64_C(10000000) * p_input->p_fmt->video.i_frame_rate_base /
 349                      (int64_t)p_input->p_fmt->video.i_frame_rate );
 350             SetQWLE( &p_stream->p_oggds_header->i_samples_per_unit, 1 );
 351             SetDWLE( &p_stream->p_oggds_header->i_default_len, 1 ); /* ??? */
 352             SetDWLE( &p_stream->p_oggds_header->i_buffer_size, 1024*1024 );
 353             SetWLE( &p_stream->p_oggds_header->i_bits_per_sample, 0 );
 354             SetDWLE( &p_stream->p_oggds_header->header.video.i_width,
 355                      p_input->p_fmt->video.i_width );
 356             SetDWLE( &p_stream->p_oggds_header->header.video.i_height,
 357                      p_input->p_fmt->video.i_height );
 358             msg_Dbg( p_mux, "%4.4s stream", (char *)&p_stream->i_fourcc );
 359             break;
 360
 361         case VLC_CODEC_DIRAC:
 362             msg_Dbg( p_mux, "dirac stream" );
 363             break;
 364
 365         case VLC_CODEC_THEORA:
 366             msg_Dbg( p_mux, "theora stream" );
 367             break;
 368
 369         default:
 370             FREENULL( p_input->p_sys );
 371             return VLC_EGENERIC;
 372         }
 373         break;
 374
 375     case AUDIO_ES:
 376         switch( p_stream->i_fourcc )
 377         {
 378         case VLC_CODEC_VORBIS:
 379             msg_Dbg( p_mux, "vorbis stream" );
 380             break;
 381
 382         case VLC_CODEC_SPEEX:
 383             msg_Dbg( p_mux, "speex stream" );
 384             break;
 385
 386         case VLC_CODEC_FLAC:
 387             msg_Dbg( p_mux, "flac stream" );
 388             break;
 389
 390         default:
 391             fourcc_to_wf_tag( p_stream->i_fourcc, &i_tag );
 392             if( i_tag == WAVE_FORMAT_UNKNOWN )
 393             {
 394                 FREENULL( p_input->p_sys );
 395                 return VLC_EGENERIC;
 396             }
 397
 398             p_stream->p_oggds_header =
 399                 malloc( sizeof(oggds_header_t) + p_input->p_fmt->i_extra );
 400             if( !p_stream->p_oggds_header )
 401             {
 402                 free( p_stream );
 403                 return VLC_ENOMEM;
 404             }
 405             memset( p_stream->p_oggds_header, 0, sizeof(oggds_header_t) );
 406             p_stream->p_oggds_header->i_packet_type = PACKET_TYPE_HEADER;
 407
 408             SetDWLE( &p_stream->p_oggds_header->i_size,
 409                      sizeof( oggds_header_t ) - 1 + p_input->p_fmt->i_extra );
 410
 411             if( p_input->p_fmt->i_extra )
 412             {
 413                 memcpy( &p_stream->p_oggds_header[1],
 414                         p_input->p_fmt->p_extra, p_input->p_fmt->i_extra );
 415             }
 416
 417             memcpy( p_stream->p_oggds_header->stream_type, "audio", 5 );
 418
 419             memset( p_stream->p_oggds_header->sub_type, 0, 4 );
 420             sprintf( p_stream->p_oggds_header->sub_type, "%-x", i_tag );
 421
 422             SetQWLE( &p_stream->p_oggds_header->i_time_unit, INT64_C(10000000) );
 423             SetDWLE( &p_stream->p_oggds_header->i_default_len, 1 );
 424             SetDWLE( &p_stream->p_oggds_header->i_buffer_size, 30*1024 );
 425             SetQWLE( &p_stream->p_oggds_header->i_samples_per_unit,
 426                      p_input->p_fmt->audio.i_rate );
 427             SetWLE( &p_stream->p_oggds_header->i_bits_per_sample,
 428                     p_input->p_fmt->audio.i_bitspersample );
 429             SetDWLE( &p_stream->p_oggds_header->header.audio.i_channels,
 430                      p_input->p_fmt->audio.i_channels );
 431             SetDWLE( &p_stream->p_oggds_header->header.audio.i_block_align,
 432                      p_input->p_fmt->audio.i_blockalign );
 433             SetDWLE( &p_stream->p_oggds_header->header.audio.i_avgbytespersec,
 434                      p_input->p_fmt->i_bitrate / 8);
 435             msg_Dbg( p_mux, "%4.4s stream", (char *)&p_stream->i_fourcc );
 436             break;
 437         }
 438         break;
 439
 440     case SPU_ES:
 441         switch( p_stream->i_fourcc )
 442         {
 443         case VLC_CODEC_SUBT:
 444             p_stream->p_oggds_header = calloc( 1, sizeof(oggds_header_t) );
 445             if( !p_stream->p_oggds_header )
 446             {
 447                 free( p_stream );
 448                 return VLC_ENOMEM;
 449             }
 450             p_stream->p_oggds_header->i_packet_type = PACKET_TYPE_HEADER;
 451
 452             memcpy( p_stream->p_oggds_header->stream_type, "text", 4 );
 453             msg_Dbg( p_mux, "subtitles stream" );
 454             break;
 455
 456         default:
 457             FREENULL( p_input->p_sys );
 458             return VLC_EGENERIC;
 459         }
 460         break;
 461     default:
 462         FREENULL( p_input->p_sys );
 463         return VLC_EGENERIC;
 464     }
 465
 466     p_stream->b_new = true;
 467
 468     p_sys->i_add_streams++;
 469
 470     return VLC_SUCCESS;
 471 }
 472
 473 /*****************************************************************************
 474  * DelStream: Delete an elementary stream from the muxed stream
 475  *****************************************************************************/
 476 static int DelStream( sout_mux_t *p_mux, sout_input_t *p_input )
 477 {
 478     sout_mux_sys_t *p_sys  = p_mux->p_sys;
 479     ogg_stream_t   *p_stream = (ogg_stream_t*)p_input->p_sys;
 480     block_t *p_og;
 481
 482     msg_Dbg( p_mux, "removing input" );
 483
 484     /* flush all remaining data */
 485     if( p_input->p_sys )
 486     {
 487         if( !p_stream->b_new )
 488         {
 489             while( block_FifoCount( p_input->p_fifo ) )
 490                 MuxBlock( p_mux, p_input );
 491         }
 492
 493         if( !p_stream->b_new &&
 494             ( p_og = OggStreamFlush( p_mux, &p_stream->os, 0 ) ) )
 495         {
 496             OggSetDate( p_og, p_stream->i_dts, p_stream->i_length );
 497             sout_AccessOutWrite( p_mux->p_access, p_og );
 498         }
 499
 500         /* move input in delete queue */
 501         if( !p_stream->b_new )
 502         {
 503             p_sys->pp_del_streams = xrealloc( p_sys->pp_del_streams,
 504                         (p_sys->i_del_streams + 1) * sizeof(ogg_stream_t *) );
 505             p_sys->pp_del_streams[p_sys->i_del_streams++] = p_stream;
 506         }
 507         else
 508         {
 509             /* wasn't already added so get rid of it */
 510             FREENULL( p_stream->p_oggds_header );
 511             FREENULL( p_stream );
 512             p_sys->i_add_streams--;
 513         }
 514     }
 515
 516     p_input->p_sys = NULL;
 517
 518     return 0;
 519 }
 520
 521 /*****************************************************************************
 522  * Ogg bitstream manipulation routines
 523  *****************************************************************************/
 524 static block_t *OggStreamGetPage( sout_mux_t *p_mux,
 525                                   ogg_stream_state *p_os, mtime_t i_pts,
 526                                   bool flush )
 527 {
 528     (void)p_mux;
 529     block_t *p_og, *p_og_first = NULL;
 530     ogg_page og;
 531     int (*pager)( ogg_stream_state*, ogg_page* ) = flush ? ogg_stream_flush : ogg_stream_pageout;
 532
 533     while( pager( p_os, &og ) )
 534     {
 535         /* Flush all data */
 536         p_og = block_New( p_mux, og.header_len + og.body_len );
 537
 538         memcpy( p_og->p_buffer, og.header, og.header_len );
 539         memcpy( p_og->p_buffer + og.header_len, og.body, og.body_len );
 540         p_og->i_dts     = 0;
 541         p_og->i_pts     = i_pts;
 542         p_og->i_length  = 0;
 543
 544         i_pts = 0; // write it only once
 545
 546         block_ChainAppend( &p_og_first, p_og );
 547     }
 548
 549     return p_og_first;
 550 }
 551
 552 static block_t *OggStreamFlush( sout_mux_t *p_mux,
 553                                 ogg_stream_state *p_os, mtime_t i_pts )
 554 {
 555     return OggStreamGetPage( p_mux, p_os, i_pts, true );
 556 }
 557
 558 static block_t *OggStreamPageOut( sout_mux_t *p_mux,
 559                                   ogg_stream_state *p_os, mtime_t i_pts )
 560 {
 561     return OggStreamGetPage( p_mux, p_os, i_pts, false );
 562 }
 563
 564 static block_t *OggCreateHeader( sout_mux_t *p_mux )
 565 {
 566     block_t *p_hdr = NULL;
 567     block_t *p_og = NULL;
 568     ogg_packet op;
 569     int i;
 570
 571     /* Write header for each stream. All b_o_s (beginning of stream) packets
 572      * must appear first in the ogg stream so we take care of them first. */
 573     for( int pass = 0; pass < 2; pass++ )
 574     {
 575         for( i = 0; i < p_mux->i_nb_inputs; i++ )
 576         {
 577             sout_input_t *p_input = p_mux->pp_inputs[i];
 578             ogg_stream_t *p_stream = (ogg_stream_t*)p_input->p_sys;
 579
 580             bool video = ( p_stream->i_fourcc == VLC_CODEC_THEORA || p_stream->i_fourcc == VLC_CODEC_DIRAC );
 581             if( ( ( pass == 0 && !video ) || ( pass == 1 && video ) ) )
 582                 continue;
 583
 584             msg_Dbg( p_mux, "creating header for %4.4s",
 585                      (char *)&p_stream->i_fourcc );
 586
 587             ogg_stream_init( &p_stream->os, p_stream->i_serial_no );
 588             p_stream->b_new = false;
 589             p_stream->i_packet_no = 0;
 590
 591             if( p_stream->i_fourcc == VLC_CODEC_VORBIS ||
 592                 p_stream->i_fourcc == VLC_CODEC_SPEEX ||
 593                 p_stream->i_fourcc == VLC_CODEC_THEORA )
 594             {
 595                 /* First packet in order: vorbis/speex/theora info */
 596                 unsigned pi_size[XIPH_MAX_HEADER_COUNT];
 597                 void     *pp_data[XIPH_MAX_HEADER_COUNT];
 598                 unsigned i_count;
 599                 if( xiph_SplitHeaders( pi_size, pp_data, &i_count,
 600                                        p_input->p_fmt->i_extra, p_input->p_fmt->p_extra ) )
 601                 {
 602                     i_count = 0;
 603                     pi_size[0] = 0;
 604                     pp_data[0] = NULL;
 605                 }
 606
 607                 op.bytes  = pi_size[0];
 608                 op.packet = pp_data[0];
 609                 if( pi_size[0] <= 0 )
 610                     msg_Err( p_mux, "header data corrupted");
 611
 612                 op.b_o_s  = 1;
 613                 op.e_o_s  = 0;
 614                 op.granulepos = 0;
 615                 op.packetno = p_stream->i_packet_no++;
 616                 ogg_stream_packetin( &p_stream->os, &op );
 617                 p_og = OggStreamFlush( p_mux, &p_stream->os, 0 );
 618
 619                 /* Get keyframe_granule_shift for theora granulepos calculation */
 620                 if( p_stream->i_fourcc == VLC_CODEC_THEORA )
 621                 {
 622                     p_stream->i_keyframe_granule_shift =
 623                         ( (op.packet[40] & 0x03) << 3 ) | ( (op.packet[41] & 0xe0) >> 5 );
 624                 }
 625
 626                 for( unsigned i = 0; i < i_count; i++ )
 627                     free( pp_data[i] );
 628             }
 629             else if( p_stream->i_fourcc == VLC_CODEC_DIRAC )
 630             {
 631                 op.packet = p_input->p_fmt->p_extra;
 632                 op.bytes  = p_input->p_fmt->i_extra;
 633                 op.b_o_s  = 1;
 634                 op.e_o_s  = 0;
 635                 op.granulepos = ~0;
 636                 op.packetno = p_stream->i_packet_no++;
 637                 ogg_stream_packetin( &p_stream->os, &op );
 638                 p_og = OggStreamFlush( p_mux, &p_stream->os, 0 );
 639             }
 640             else if( p_stream->i_fourcc == VLC_CODEC_FLAC )
 641             {
 642                 /* flac stream marker (yeah, only that in the 1st packet) */
 643                 op.packet = (unsigned char *)"fLaC";
 644                 op.bytes  = 4;
 645                 op.b_o_s  = 1;
 646                 op.e_o_s  = 0;
 647                 op.granulepos = 0;
 648                 op.packetno = p_stream->i_packet_no++;
 649                 ogg_stream_packetin( &p_stream->os, &op );
 650                 p_og = OggStreamFlush( p_mux, &p_stream->os, 0 );
 651             }
 652             else if( p_stream->p_oggds_header )
 653             {
 654                 /* ds header */
 655                 op.packet = (uint8_t*)p_stream->p_oggds_header;
 656                 op.bytes  = p_stream->p_oggds_header->i_size + 1;
 657                 op.b_o_s  = 1;
 658                 op.e_o_s  = 0;
 659                 op.granulepos = 0;
 660                 op.packetno = p_stream->i_packet_no++;
 661                 ogg_stream_packetin( &p_stream->os, &op );
 662                 p_og = OggStreamFlush( p_mux, &p_stream->os, 0 );
 663             }
 664
 665             block_ChainAppend( &p_hdr, p_og );
 666         }
 667     }
 668
 669     /* Take care of the non b_o_s headers */
 670     for( i = 0; i < p_mux->i_nb_inputs; i++ )
 671     {
 672         sout_input_t *p_input = p_mux->pp_inputs[i];
 673         ogg_stream_t *p_stream = (ogg_stream_t*)p_input->p_sys;
 674
 675         if( p_stream->i_fourcc == VLC_CODEC_VORBIS ||
 676             p_stream->i_fourcc == VLC_CODEC_SPEEX ||
 677             p_stream->i_fourcc == VLC_CODEC_THEORA )
 678         {
 679             unsigned pi_size[XIPH_MAX_HEADER_COUNT];
 680             void     *pp_data[XIPH_MAX_HEADER_COUNT];
 681             unsigned i_count;
 682             if( xiph_SplitHeaders( pi_size, pp_data, &i_count,
 683                                    p_input->p_fmt->i_extra, p_input->p_fmt->p_extra ) )
 684                 i_count = 0;
 685
 686             /* Special case, headers are already there in the incoming stream.
 687              * We need to gather them an mark them as headers. */
 688             for( unsigned i = 1; i < i_count; i++ )
 689             {
 690                 op.bytes  = pi_size[i];
 691                 op.packet = pp_data[i];
 692                 if( pi_size[i] <= 0 )
 693                     msg_Err( p_mux, "header data corrupted");
 694
 695                 op.b_o_s  = 0;
 696                 op.e_o_s  = 0;
 697                 op.granulepos = 0;
 698                 op.packetno = p_stream->i_packet_no++;
 699                 ogg_stream_packetin( &p_stream->os, &op );
 700
 701                 if( i == i_count - 1 )
 702                     p_og = OggStreamFlush( p_mux, &p_stream->os, 0 );
 703                 else
 704                     p_og = OggStreamPageOut( p_mux, &p_stream->os, 0 );
 705                 if( p_og )
 706                     block_ChainAppend( &p_hdr, p_og );
 707             }
 708             for( unsigned i = 0; i < i_count; i++ )
 709                 free( pp_data[i] );
 710         }
 711         else if( p_stream->i_fourcc != VLC_CODEC_FLAC &&
 712                  p_stream->i_fourcc != VLC_CODEC_DIRAC )
 713         {
 714             uint8_t com[128];
 715             int     i_com;
 716
 717             /* comment */
 718             com[0] = PACKET_TYPE_COMMENT;
 719             i_com = snprintf( (char *)(com+1), 127,
 720                               PACKAGE_VERSION" stream output" )
 721                      + 1;
 722             op.packet = com;
 723             op.bytes  = i_com;
 724             op.b_o_s  = 0;
 725             op.e_o_s  = 0;
 726             op.granulepos = 0;
 727             op.packetno = p_stream->i_packet_no++;
 728             ogg_stream_packetin( &p_stream->os, &op );
 729             p_og = OggStreamFlush( p_mux, &p_stream->os, 0 );
 730             block_ChainAppend( &p_hdr, p_og );
 731         }
 732
 733         /* Special case for mp4v and flac */
 734         if( ( p_stream->i_fourcc == VLC_CODEC_MP4V ||
 735               p_stream->i_fourcc == VLC_CODEC_FLAC ) &&
 736             p_input->p_fmt->i_extra )
 737         {
 738             /* Send a packet with the VOL data for mp4v
 739              * or STREAMINFO for flac */
 740             msg_Dbg( p_mux, "writing extra data" );
 741             op.bytes  = p_input->p_fmt->i_extra;
 742             op.packet = p_input->p_fmt->p_extra;
 743             if( p_stream->i_fourcc == VLC_CODEC_FLAC )
 744             {
 745                 /* Skip the flac stream marker */
 746                 op.bytes -= 4;
 747                 op.packet+= 4;
 748             }
 749             op.b_o_s  = 0;
 750             op.e_o_s  = 0;
 751             op.granulepos = 0;
 752             op.packetno = p_stream->i_packet_no++;
 753             ogg_stream_packetin( &p_stream->os, &op );
 754             p_og = OggStreamFlush( p_mux, &p_stream->os, 0 );
 755             block_ChainAppend( &p_hdr, p_og );
 756         }
 757     }
 758
 759     /* set HEADER flag */
 760     for( p_og = p_hdr; p_og != NULL; p_og = p_og->p_next )
 761     {
 762         p_og->i_flags |= BLOCK_FLAG_HEADER;
 763     }
 764     return p_hdr;
 765 }
 766
 767 static block_t *OggCreateFooter( sout_mux_t *p_mux )
 768 {
 769     sout_mux_sys_t *p_sys = p_mux->p_sys;
 770     block_t *p_hdr = NULL;
 771     block_t *p_og;
 772     ogg_packet    op;
 773     int     i;
 774
 775     /* flush all remaining data */
 776     for( i = 0; i < p_mux->i_nb_inputs; i++ )
 777     {
 778         ogg_stream_t *p_stream = p_mux->pp_inputs[i]->p_sys;
 779
 780         /* skip newly added streams */
 781         if( p_stream->b_new ) continue;
 782
 783         if( ( p_og = OggStreamFlush( p_mux, &p_stream->os, 0 ) ) )
 784         {
 785             OggSetDate( p_og, p_stream->i_dts, p_stream->i_length );
 786             sout_AccessOutWrite( p_mux->p_access, p_og );
 787         }
 788     }
 789
 790     /* Write eos packets for each stream. */
 791     for( i = 0; i < p_mux->i_nb_inputs; i++ )
 792     {
 793         ogg_stream_t *p_stream = p_mux->pp_inputs[i]->p_sys;
 794
 795         /* skip newly added streams */
 796         if( p_stream->b_new ) continue;
 797
 798         op.packet = NULL;
 799         op.bytes  = 0;
 800         op.b_o_s  = 0;
 801         op.e_o_s  = 1;
 802         op.granulepos = p_stream->u_last_granulepos;
 803         op.packetno = p_stream->i_packet_no++;
 804         ogg_stream_packetin( &p_stream->os, &op );
 805
 806         p_og = OggStreamFlush( p_mux, &p_stream->os, 0 );
 807         block_ChainAppend( &p_hdr, p_og );
 808         ogg_stream_clear( &p_stream->os );
 809     }
 810
 811     for( i = 0; i < p_sys->i_del_streams; i++ )
 812     {
 813         op.packet = NULL;
 814         op.bytes  = 0;
 815         op.b_o_s  = 0;
 816         op.e_o_s  = 1;
 817         op.granulepos = p_sys->pp_del_streams[i]->u_last_granulepos;
 818         op.packetno = p_sys->pp_del_streams[i]->i_packet_no++;
 819         ogg_stream_packetin( &p_sys->pp_del_streams[i]->os, &op );
 820
 821         p_og = OggStreamFlush( p_mux, &p_sys->pp_del_streams[i]->os, 0 );
 822         block_ChainAppend( &p_hdr, p_og );
 823         ogg_stream_clear( &p_sys->pp_del_streams[i]->os );
 824     }
 825
 826     return p_hdr;
 827 }
 828
 829 static void OggSetDate( block_t *p_og, mtime_t i_dts, mtime_t i_length )
 830 {
 831     int i_count;
 832     block_t *p_tmp;
 833     mtime_t i_delta;
 834
 835     for( p_tmp = p_og, i_count = 0; p_tmp != NULL; p_tmp = p_tmp->p_next )
 836     {
 837         i_count++;
 838     }
 839
 840     if( i_count == 0 ) return; /* ignore. */
 841
 842     i_delta = i_length / i_count;
 843
 844     for( p_tmp = p_og; p_tmp != NULL; p_tmp = p_tmp->p_next )
 845     {
 846         p_tmp->i_dts    = i_dts;
 847         p_tmp->i_length = i_delta;
 848
 849         i_dts += i_delta;
 850     }
 851 }
 852
 853 /*****************************************************************************
 854  * Mux: multiplex available data in input fifos into the Ogg bitstream
 855  *****************************************************************************/
 856 static int Mux( sout_mux_t *p_mux )
 857 {
 858     sout_mux_sys_t *p_sys = p_mux->p_sys;
 859     block_t        *p_og = NULL;
 860     mtime_t        i_dts;
 861
 862     if( p_sys->i_add_streams || p_sys->i_del_streams )
 863     {
 864         /* Open new ogg stream */
 865         if( sout_MuxGetStream( p_mux, 1, &i_dts) < 0 )
 866         {
 867             msg_Dbg( p_mux, "waiting for data..." );
 868             return VLC_SUCCESS;
 869         }
 870
 871         if( p_sys->i_streams )
 872         {
 873             /* Close current ogg stream */
 874             int i;
 875
 876             msg_Dbg( p_mux, "writing footer" );
 877             block_ChainAppend( &p_og, OggCreateFooter( p_mux ) );
 878
 879             /* Remove deleted logical streams */
 880             for( i = 0; i < p_sys->i_del_streams; i++ )
 881             {
 882                 FREENULL( p_sys->pp_del_streams[i]->p_oggds_header );
 883                 FREENULL( p_sys->pp_del_streams[i] );
 884             }
 885             FREENULL( p_sys->pp_del_streams );
 886             p_sys->i_streams = 0;
 887         }
 888
 889         msg_Dbg( p_mux, "writing header" );
 890         p_sys->i_start_dts = i_dts;
 891         p_sys->i_streams = p_mux->i_nb_inputs;
 892         p_sys->i_del_streams = 0;
 893         p_sys->i_add_streams = 0;
 894         block_ChainAppend( &p_og, OggCreateHeader( p_mux ) );
 895
 896         /* Write header and/or footer */
 897         OggSetDate( p_og, i_dts, 0 );
 898         sout_AccessOutWrite( p_mux->p_access, p_og );
 899         p_og = NULL;
 900     }
 901
 902     for( ;; )
 903     {
 904         int i_stream = sout_MuxGetStream( p_mux, 1, NULL );
 905         if( i_stream < 0 )
 906             return VLC_SUCCESS;
 907         MuxBlock( p_mux, p_mux->pp_inputs[i_stream] );
 908     }
 909
 910     return VLC_SUCCESS;
 911 }
 912
 913 static int MuxBlock( sout_mux_t *p_mux, sout_input_t *p_input )
 914 {
 915     sout_mux_sys_t *p_sys = p_mux->p_sys;
 916     ogg_stream_t *p_stream = (ogg_stream_t*)p_input->p_sys;
 917     block_t *p_data = block_FifoGet( p_input->p_fifo );
 918     block_t *p_og = NULL;
 919     ogg_packet op;
 920
 921     if( p_stream->i_fourcc != VLC_CODEC_VORBIS &&
 922         p_stream->i_fourcc != VLC_CODEC_FLAC &&
 923         p_stream->i_fourcc != VLC_CODEC_SPEEX &&
 924         p_stream->i_fourcc != VLC_CODEC_THEORA &&
 925         p_stream->i_fourcc != VLC_CODEC_DIRAC )
 926     {
 927         p_data = block_Realloc( p_data, 1, p_data->i_buffer );
 928         p_data->p_buffer[0] = PACKET_IS_SYNCPOINT;      // FIXME
 929     }
 930
 931     op.packet   = p_data->p_buffer;
 932     op.bytes    = p_data->i_buffer;
 933     op.b_o_s    = 0;
 934     op.e_o_s    = 0;
 935     op.packetno = p_stream->i_packet_no++;
 936
 937     if( p_stream->i_cat == AUDIO_ES )
 938     {
 939         if( p_stream->i_fourcc == VLC_CODEC_VORBIS ||
 940             p_stream->i_fourcc == VLC_CODEC_FLAC ||
 941             p_stream->i_fourcc == VLC_CODEC_SPEEX )
 942         {
 943             /* number of sample from begining + current packet */
 944             op.granulepos =
 945                 ( p_data->i_dts - p_sys->i_start_dts + p_data->i_length ) *
 946                 (mtime_t)p_input->p_fmt->audio.i_rate / INT64_C(1000000);
 947         }
 948         else if( p_stream->p_oggds_header )
 949         {
 950             /* number of sample from begining */
 951             op.granulepos = ( p_data->i_dts - p_sys->i_start_dts ) *
 952                 p_stream->p_oggds_header->i_samples_per_unit / INT64_C(1000000);
 953         }
 954     }
 955     else if( p_stream->i_cat == VIDEO_ES )
 956     {
 957         if( p_stream->i_fourcc == VLC_CODEC_THEORA )
 958         {
 959             p_stream->i_num_frames++;
 960             if( p_data->i_flags & BLOCK_FLAG_TYPE_I )
 961             {
 962                 p_stream->i_num_keyframes++;
 963                 p_stream->i_last_keyframe = p_stream->i_num_frames;
 964             }
 965
 966             op.granulepos = (p_stream->i_last_keyframe << p_stream->i_keyframe_granule_shift )
 967                           | (p_stream->i_num_frames-p_stream->i_last_keyframe);
 968         }
 969         else if( p_stream->i_fourcc == VLC_CODEC_DIRAC )
 970         {
 971             mtime_t dt = (p_data->i_dts - p_sys->i_start_dts + 1)
 972                        * p_input->p_fmt->video.i_frame_rate *2
 973                        / p_input->p_fmt->video.i_frame_rate_base
 974                        / INT64_C(1000000);
 975             mtime_t delay = (p_data->i_pts - p_data->i_dts + 1)
 976                           * p_input->p_fmt->video.i_frame_rate *2
 977                           / p_input->p_fmt->video.i_frame_rate_base
 978                           / INT64_C(1000000);
 979             if( p_data->i_flags & BLOCK_FLAG_TYPE_I )
 980                 p_stream->i_last_keyframe = dt;
 981             mtime_t dist = dt - p_stream->i_last_keyframe;
 982             op.granulepos = dt << 31 | (dist&0xff00) << 14
 983                           | (delay&0x1fff) << 9 | (dist&0xff);
 984         }
 985         else if( p_stream->p_oggds_header )
 986             op.granulepos = ( p_data->i_dts - p_sys->i_start_dts ) * INT64_C(10) /
 987                 p_stream->p_oggds_header->i_time_unit;
 988     }
 989     else if( p_stream->i_cat == SPU_ES )
 990     {
 991         /* granulepos is in millisec */
 992         op.granulepos = ( p_data->i_dts - p_sys->i_start_dts ) / 1000;
 993     }
 994
 995     p_stream->u_last_granulepos = op.granulepos;
 996     ogg_stream_packetin( &p_stream->os, &op );
 997
 998     if( p_stream->i_cat == SPU_ES ||
 999         p_stream->i_fourcc == VLC_CODEC_SPEEX ||
1000         p_stream->i_fourcc == VLC_CODEC_DIRAC )
1001     {
1002         /* Subtitles or Speex packets are quite small so they
1003          * need to be flushed to be sent on time */
1004         /* The OggDirac mapping suggests ever so strongly that a
1005          * page flush occurs after each OggDirac packet, so to make
1006          * the timestamps unambiguous */
1007         p_og = OggStreamFlush( p_mux, &p_stream->os, p_data->i_dts );
1008     }
1009     else
1010     {
1011         p_og = OggStreamPageOut( p_mux, &p_stream->os, p_data->i_dts );
1012     }
1013
1014     if( p_og )
1015     {
1016         OggSetDate( p_og, p_stream->i_dts, p_stream->i_length );
1017         p_stream->i_dts = -1;
1018         p_stream->i_length = 0;
1019
1020         sout_AccessOutWrite( p_mux->p_access, p_og );
1021     }
1022     else
1023     {
1024         if( p_stream->i_dts < 0 )
1025         {
1026             p_stream->i_dts = p_data->i_dts;
1027         }
1028         p_stream->i_length += p_data->i_length;
1029     }
1030
1031     block_Release( p_data );
1032     return VLC_SUCCESS;
1033 }