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