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