ogg.c 42.2 KB
Newer Older
Gildas Bazin's avatar
 
Gildas Bazin committed
1 2 3 4
/*****************************************************************************
 * ogg.c : ogg stream input module for vlc
 *****************************************************************************
 * Copyright (C) 2001 VideoLAN
Gildas Bazin's avatar
 
Gildas Bazin committed
5
 * $Id: ogg.c,v 1.12 2002/11/21 10:12:34 gbazin Exp $
Gildas Bazin's avatar
 
Gildas Bazin committed
6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36
 *
 * Authors: Gildas Bazin <gbazin@netcourrier.com>
 * 
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
 *****************************************************************************/

/*****************************************************************************
 * Preamble
 *****************************************************************************/
#include <stdlib.h>                                      /* malloc(), free() */
#include <string.h>

#include <vlc/vlc.h>
#include <vlc/input.h>

#include <sys/types.h>

#include <ogg/ogg.h>

Gildas Bazin's avatar
 
Gildas Bazin committed
37 38
#include <codecs.h>                        /* BITMAPINFOHEADER, WAVEFORMATEX */

Gildas Bazin's avatar
 
Gildas Bazin committed
39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54
#define OGG_BLOCK_SIZE 4096
#define PAGES_READ_ONCE 1

/*****************************************************************************
 * Definitions of structures and functions used by this plugins 
 *****************************************************************************/
typedef struct logical_stream_s
{
    ogg_stream_state os;                        /* logical stream of packets */

    int              i_serial_no;
    int              i_cat;                            /* AUDIO_ES, VIDEO_ES */
    int              i_activated;
    vlc_fourcc_t     i_fourcc;
    vlc_fourcc_t     i_codec;

Gildas Bazin's avatar
 
Gildas Bazin committed
55
    es_descriptor_t  *p_es;
Gildas Bazin's avatar
 
Gildas Bazin committed
56 57
    int              b_selected;                           /* newly selected */

Gildas Bazin's avatar
 
Gildas Bazin committed
58 59 60 61 62 63 64
    /* the header of some logical streams (eg vorbis) contain essential
     * data for the decoder. We back them up here in case we need to re-feed
     * them to the decoder. */
    int              b_force_backup;
    int              i_packets_backup;
    ogg_packet       *p_packets_backup;

Gildas Bazin's avatar
 
Gildas Bazin committed
65 66
    /* program clock reference (in units of 90kHz) derived from the previous
     * granulepos */
Gildas Bazin's avatar
 
Gildas Bazin committed
67
    mtime_t          i_pcr;
Gildas Bazin's avatar
 
Gildas Bazin committed
68
    mtime_t          i_interpolated_pcr;
Gildas Bazin's avatar
 
Gildas Bazin committed
69 70

    /* info from logical streams */
Gildas Bazin's avatar
 
Gildas Bazin committed
71
    double f_rate;
Gildas Bazin's avatar
 
Gildas Bazin committed
72
    int i_bitrate;
Gildas Bazin's avatar
 
Gildas Bazin committed
73
    int b_reinit;
Gildas Bazin's avatar
 
Gildas Bazin committed
74

Gildas Bazin's avatar
 
Gildas Bazin committed
75
    /* codec specific stuff */
Gildas Bazin's avatar
 
Gildas Bazin committed
76 77
    BITMAPINFOHEADER *p_bih;
    WAVEFORMATEX *p_wf;
Gildas Bazin's avatar
 
Gildas Bazin committed
78
    int i_theora_keyframe_granule_shift;
Gildas Bazin's avatar
 
Gildas Bazin committed
79

Gildas Bazin's avatar
 
Gildas Bazin committed
80 81 82 83 84 85 86 87 88 89 90 91
} logical_stream_t;

struct demux_sys_t
{
    ogg_sync_state oy;        /* sync and verify incoming physical bitstream */

    int i_streams;                           /* number of logical bitstreams */
    logical_stream_t **pp_stream;  /* pointer to an array of logical streams */

    /* current audio and video es */
    logical_stream_t *p_stream_video;
    logical_stream_t *p_stream_audio;
Gildas Bazin's avatar
 
Gildas Bazin committed
92
    logical_stream_t *p_stream_spu;
Gildas Bazin's avatar
 
Gildas Bazin committed
93

Gildas Bazin's avatar
 
Gildas Bazin committed
94
    /* program clock reference (in units of 90kHz) derived from the pcr of
Gildas Bazin's avatar
 
Gildas Bazin committed
95
     * the sub-streams */
Gildas Bazin's avatar
 
Gildas Bazin committed
96 97
    mtime_t i_pcr;

Gildas Bazin's avatar
 
Gildas Bazin committed
98 99
    mtime_t i_length;
    int     b_seekable;
Gildas Bazin's avatar
 
Gildas Bazin committed
100
    int     b_reinit;
Gildas Bazin's avatar
 
Gildas Bazin committed
101 102
};

Gildas Bazin's avatar
 
Gildas Bazin committed
103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146
/* OggDS headers for the new header format (used in ogm files) */
typedef struct stream_header_video
{
    ogg_int32_t width;
    ogg_int32_t height;
} stream_header_video;
        
typedef struct stream_header_audio
{
    ogg_int16_t channels;
    ogg_int16_t blockalign;
    ogg_int32_t avgbytespersec;
} stream_header_audio;

typedef struct stream_header
{
    char        streamtype[8];
    char        subtype[4];

    ogg_int32_t size;                               /* size of the structure */

    ogg_int64_t time_unit;                              /* in reference time */
    ogg_int64_t samples_per_unit;
    ogg_int32_t default_len;                                /* in media time */

    ogg_int32_t buffersize;
    ogg_int16_t bits_per_sample;

    union
    {
        /* Video specific */
        stream_header_video video;
        /* Audio specific */
        stream_header_audio audio;
    } sh;
} stream_header;

/* Some defines from OggDS */
#define PACKET_TYPE_HEADER   0x01
#define PACKET_TYPE_BITS     0x07
#define PACKET_LEN_BITS01    0xc0
#define PACKET_LEN_BITS2     0x02
#define PACKET_IS_SYNCPOINT  0x08

Gildas Bazin's avatar
 
Gildas Bazin committed
147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162
/* Some functions to manipulate memory */
static uint16_t GetWLE( uint8_t *p_buff )
{
    return( (p_buff[0]) + ( p_buff[1] <<8 ) );
}

static uint32_t GetDWLE( uint8_t *p_buff )
{
    return( p_buff[0] + ( p_buff[1] <<8 ) +
            ( p_buff[2] <<16 ) + ( p_buff[3] <<24 ) );
}

static uint64_t GetQWLE( uint8_t *p_buff )
{
    return( GetDWLE( p_buff ) + ( ((uint64_t)GetDWLE( p_buff + 4 )) << 32 ) );
}
Gildas Bazin's avatar
 
Gildas Bazin committed
163 164 165 166 167 168 169 170 171 172 173 174 175 176
/*****************************************************************************
 * Local prototypes
 *****************************************************************************/
static int  Activate  ( vlc_object_t * );
static void Deactivate( vlc_object_t * );
static int  Demux     ( input_thread_t * );

/* Stream managment */
static int  Ogg_StreamStart  ( input_thread_t *, demux_sys_t *, int );
static void Ogg_StreamStop   ( input_thread_t *, demux_sys_t *, int );

/* Bitstream manipulation */
static int  Ogg_Check        ( input_thread_t *p_input );
static int  Ogg_ReadPage     ( input_thread_t *, demux_sys_t *, ogg_page * );
Gildas Bazin's avatar
 
Gildas Bazin committed
177
static void Ogg_UpdatePCR    ( logical_stream_t *, ogg_packet * );
Gildas Bazin's avatar
 
Gildas Bazin committed
178
static void Ogg_DecodePacket ( input_thread_t *p_input,
Gildas Bazin's avatar
 
Gildas Bazin committed
179
                               logical_stream_t *p_stream, ogg_packet * );
Gildas Bazin's avatar
 
Gildas Bazin committed
180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218
static int  Ogg_FindLogicalStreams( input_thread_t *p_input,
                                    demux_sys_t *p_ogg );

/*****************************************************************************
 * Module descriptor
 *****************************************************************************/
vlc_module_begin();
    set_description( _("ogg stream demux" ) );
    set_capability( "demux", 50 );
    set_callbacks( Activate, Deactivate );
    add_shortcut( "ogg" );
vlc_module_end();

/*****************************************************************************
 * Stream managment
 *****************************************************************************/
static int Ogg_StreamStart( input_thread_t *p_input,
                            demux_sys_t *p_ogg, int i_stream )
{
#define p_stream p_ogg->pp_stream[i_stream]
    if( !p_stream->p_es )
    {
        msg_Warn( p_input, "stream[%d] unselectable", i_stream );
        return( 0 );
    }
    if( p_stream->i_activated )
    {
        msg_Warn( p_input, "stream[%d] already selected", i_stream );
        return( 1 );
    }

    if( !p_stream->p_es->p_decoder_fifo )
    {
        vlc_mutex_lock( &p_input->stream.stream_lock );
        input_SelectES( p_input, p_stream->p_es );
        vlc_mutex_unlock( &p_input->stream.stream_lock );
    }
    p_stream->i_activated = p_stream->p_es->p_decoder_fifo ? 1 : 0;

Gildas Bazin's avatar
 
Gildas Bazin committed
219 220 221 222 223 224 225 226 227 228 229
    /* Feed the backup header to the decoder */
    if( !p_stream->b_force_backup )
    {
        int i;
        for( i = 0; i < p_stream->i_packets_backup; i++ )
        {
            Ogg_DecodePacket( p_input, p_stream,
                              &p_stream->p_packets_backup[i] );
        }
    }

Gildas Bazin's avatar
 
Gildas Bazin committed
230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303
    return( p_stream->i_activated );
#undef  p_stream
}

static void Ogg_StreamStop( input_thread_t *p_input,
                            demux_sys_t *p_ogg, int i_stream )
{
#define p_stream    p_ogg->pp_stream[i_stream]

    if( !p_stream->i_activated )
    {
        msg_Warn( p_input, "stream[%d] already unselected", i_stream );
        return;
    }

    if( p_stream->p_es->p_decoder_fifo )
    {
        vlc_mutex_lock( &p_input->stream.stream_lock );
        input_UnselectES( p_input, p_stream->p_es );
        vlc_mutex_unlock( &p_input->stream.stream_lock );
    }

    p_stream->i_activated = 0;

#undef  p_stream
}

/****************************************************************************
 * Ogg_Check: Check we are dealing with an ogg stream.
 ****************************************************************************/
static int Ogg_Check( input_thread_t *p_input )
{
    u8 *p_peek;
    int i_size = input_Peek( p_input, &p_peek, 4 );

    /* Check for the Ogg capture pattern */
    if( !(i_size>3) || !(p_peek[0] == 'O') || !(p_peek[1] == 'g') ||
        !(p_peek[2] == 'g') || !(p_peek[3] == 'S') )
        return VLC_EGENERIC;

    /* FIXME: Capture pattern might not be enough so we can also check for the
     * the first complete page */

    return VLC_SUCCESS;
}

/****************************************************************************
 * Ogg_ReadPage: Read a full Ogg page from the physical bitstream.
 ****************************************************************************
 * Returns VLC_SUCCESS if a page has been read. An error might happen if we
 * are at the end of stream.
 ****************************************************************************/
static int Ogg_ReadPage( input_thread_t *p_input, demux_sys_t *p_ogg,
                         ogg_page *p_oggpage )
{
    int i_read = 0;
    data_packet_t *p_data;
    byte_t *p_buffer;

    while( ogg_sync_pageout( &p_ogg->oy, p_oggpage ) != 1 )
    {
        i_read = input_SplitBuffer( p_input, &p_data, OGG_BLOCK_SIZE );
        if( i_read <= 0 )
            return VLC_EGENERIC;

        p_buffer = ogg_sync_buffer( &p_ogg->oy, i_read );
        p_input->p_vlc->pf_memcpy( p_buffer, p_data->p_payload_start, i_read );
        ogg_sync_wrote( &p_ogg->oy, i_read );
        input_DeletePacket( p_input->p_method_data, p_data );
    }

    return VLC_SUCCESS;
}

Gildas Bazin's avatar
 
Gildas Bazin committed
304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341
/****************************************************************************
 * Ogg_UpdatePCR: update the PCR (90kHz program clock reference) for the
 *                current stream.
 ****************************************************************************/
static void Ogg_UpdatePCR( logical_stream_t *p_stream,
                           ogg_packet *p_oggpacket )
{

    /* Convert the next granulepos into a pcr */
    if( p_oggpacket->granulepos >= 0 )
    {
        if( p_stream->i_fourcc != VLC_FOURCC( 't','h','e','o' ) )
        {
            p_stream->i_pcr = p_oggpacket->granulepos * 90000
                              / p_stream->f_rate;
        }
        else
        {
            ogg_int64_t iframe = p_oggpacket->granulepos >>
              p_stream->i_theora_keyframe_granule_shift;
            ogg_int64_t pframe = p_oggpacket->granulepos -
              ( iframe << p_stream->i_theora_keyframe_granule_shift );

            p_stream->i_pcr = ( iframe + pframe ) * 90000
                              / p_stream->f_rate;
        }

        p_stream->i_interpolated_pcr = p_stream->i_pcr;
    }
    else
    {
        /* FIXME: ffmpeg doesn't like null pts */
        if( p_stream->i_cat == VIDEO_ES )
            /* 1 frame per packet */
            p_stream->i_pcr += (90000 / p_stream->f_rate);
        else
            p_stream->i_pcr = -1;

Gildas Bazin's avatar
 
Gildas Bazin committed
342 343
        /* no granulepos available, try to interpolate the pcr.
         * If we can't then don't touch the old value. */
Gildas Bazin's avatar
 
Gildas Bazin committed
344 345 346 347 348 349
        if( p_stream->i_bitrate )
            p_stream->i_interpolated_pcr += ( p_oggpacket->bytes * 90000
                                              / p_stream->i_bitrate / 8 );
    }
}

Gildas Bazin's avatar
 
Gildas Bazin committed
350 351 352 353 354 355 356 357 358
/****************************************************************************
 * Ogg_DecodePacket: Decode an Ogg packet.
 ****************************************************************************/
static void Ogg_DecodePacket( input_thread_t *p_input,
                              logical_stream_t *p_stream,
                              ogg_packet *p_oggpacket )
{
    pes_packet_t  *p_pes;
    data_packet_t *p_data;
Gildas Bazin's avatar
 
Gildas Bazin committed
359
    //demux_sys_t *p_ogg = p_input->p_demux_data;
Gildas Bazin's avatar
 
Gildas Bazin committed
360
    int i_header_len = 0;
Gildas Bazin's avatar
 
Gildas Bazin committed
361

Gildas Bazin's avatar
 
Gildas Bazin committed
362 363
    if( p_stream->b_force_backup )
    {
Gildas Bazin's avatar
 
Gildas Bazin committed
364
        /* Backup the ogg packet (likely an header packet) */
Gildas Bazin's avatar
 
Gildas Bazin committed
365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396
        ogg_packet *p_packet_backup;
        p_stream->i_packets_backup++;
        p_stream->p_packets_backup =
            realloc( p_stream->p_packets_backup, p_stream->i_packets_backup *
                     sizeof(ogg_packet) );

        p_packet_backup =
            &p_stream->p_packets_backup[p_stream->i_packets_backup - 1];

        p_packet_backup->bytes = p_oggpacket->bytes;
        p_packet_backup->granulepos = p_oggpacket->granulepos;
        p_packet_backup->packet = malloc( p_oggpacket->bytes );
        if( !p_packet_backup->packet ) return;
        memcpy( p_packet_backup->packet, p_oggpacket->packet,
                p_oggpacket->bytes );

        switch( p_stream->i_fourcc )
        {
        case VLC_FOURCC( 'v','o','r','b' ):
          if( p_stream->i_packets_backup == 3 ) p_stream->b_force_backup = 0;
          break;

        default:
          p_stream->b_force_backup = 0;
          break;
        }
    }

    if( !p_stream->p_es->p_decoder_fifo )
    {
        /* This stream isn't currently selected so we don't need to decode it,
         * but we do need to store its pcr as it might be selected later on. */
Gildas Bazin's avatar
 
Gildas Bazin committed
397
        Ogg_UpdatePCR( p_stream, p_oggpacket );
Gildas Bazin's avatar
 
Gildas Bazin committed
398 399 400 401

        return;
    }

Gildas Bazin's avatar
 
Gildas Bazin committed
402 403 404 405 406 407 408 409 410 411
    if( !( p_pes = input_NewPES( p_input->p_method_data ) ) )
    {
        return;
    }
    if( !( p_data = input_NewPacket( p_input->p_method_data,
                                     p_oggpacket->bytes ) ) )
    {
        input_DeletePES( p_input->p_method_data, p_pes );
        return;
    }
Gildas Bazin's avatar
 
Gildas Bazin committed
412

Gildas Bazin's avatar
 
Gildas Bazin committed
413
    /* Convert the pcr into a pts */
Gildas Bazin's avatar
 
Gildas Bazin committed
414 415 416 417 418 419 420 421 422 423 424 425
    if( p_stream->i_cat != SPU_ES )
    {
        p_pes->i_pts = ( p_stream->i_pcr < 0 ) ? 0 :
            input_ClockGetTS( p_input, p_input->stream.p_selected_program,
                              p_stream->i_pcr );
    }
    else
    {
        /* Of course subtitles had to be different! */
        p_pes->i_pts = ( p_oggpacket->granulepos < 0 ) ? 0 :
            input_ClockGetTS( p_input, p_input->stream.p_selected_program,
                              p_oggpacket->granulepos * 90000 /
Gildas Bazin's avatar
 
Gildas Bazin committed
426
                              p_stream->f_rate );
Gildas Bazin's avatar
 
Gildas Bazin committed
427
    }
Gildas Bazin's avatar
 
Gildas Bazin committed
428

Gildas Bazin's avatar
 
Gildas Bazin committed
429
    /* Convert the next granulepos into a pcr */
Gildas Bazin's avatar
 
Gildas Bazin committed
430
    Ogg_UpdatePCR( p_stream, p_oggpacket );
Gildas Bazin's avatar
 
Gildas Bazin committed
431

Gildas Bazin's avatar
 
Gildas Bazin committed
432
    p_pes->i_nb_data = 1;
Gildas Bazin's avatar
 
Gildas Bazin committed
433
    p_pes->i_dts = p_oggpacket->granulepos;
Gildas Bazin's avatar
 
Gildas Bazin committed
434 435 436
    p_pes->p_first = p_pes->p_last = p_data;
    p_pes->i_pes_size = p_oggpacket->bytes;

Gildas Bazin's avatar
 
Gildas Bazin committed
437 438 439
    if( p_stream->i_fourcc != VLC_FOURCC( 'v','o','r','b' ) &&
        p_stream->i_fourcc != VLC_FOURCC( 't','a','r','k' ) &&
        p_stream->i_fourcc != VLC_FOURCC( 't','h','e','o' ) )
Gildas Bazin's avatar
 
Gildas Bazin committed
440 441 442 443 444 445 446
    {
        /* Remove the header from the packet */
        i_header_len = (*p_oggpacket->packet & PACKET_LEN_BITS01) >> 6;
        i_header_len |= (*p_oggpacket->packet & PACKET_LEN_BITS2) << 1;
        i_header_len++;

        p_pes->i_pes_size -= i_header_len;
Gildas Bazin's avatar
 
Gildas Bazin committed
447 448 449 450 451 452 453 454 455
        p_pes->i_dts = 0;
    }

    if( p_stream->i_fourcc == VLC_FOURCC( 't','a','r','k' ) )
    {
        /* FIXME: the biggest hack I've ever done */
        msg_Warn( p_input, "tark pts: %lli, granule: %i",
                  p_pes->i_pts, p_pes->i_dts );
        msleep(10000);
Gildas Bazin's avatar
 
Gildas Bazin committed
456 457 458 459 460 461 462
    }

    memcpy( p_data->p_payload_start,
            p_oggpacket->packet + i_header_len,
            p_oggpacket->bytes - i_header_len );

    p_data->p_payload_end = p_data->p_payload_start + p_pes->i_pes_size;
Gildas Bazin's avatar
 
Gildas Bazin committed
463
    p_data->b_discard_payload = 0;
Gildas Bazin's avatar
 
Gildas Bazin committed
464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529

    input_DecodePES( p_stream->p_es->p_decoder_fifo, p_pes );
}

/****************************************************************************
 * Ogg_FindLogicalStreams: Find the logical streams embedded in the physical
 *                         stream and fill p_ogg.
 *****************************************************************************
 * The initial page of a logical stream is marked as a 'bos' page.
 * Furthermore, the Ogg specification mandates that grouped bitstreams begin
 * together and all of the initial pages must appear before any data pages.
 *
 * On success this function returns VLC_SUCCESS.
 ****************************************************************************/
static int Ogg_FindLogicalStreams( input_thread_t *p_input, demux_sys_t *p_ogg)
{
    ogg_packet oggpacket;
    ogg_page oggpage;
    int i_stream;

    while( Ogg_ReadPage( p_input, p_ogg, &oggpage ) == VLC_SUCCESS )
    {
        if( ogg_page_bos( &oggpage ) )
        {

            /* All is wonderful in our fine fine little world.
             * We found the beginning of our first logical stream. */
            while( ogg_page_bos( &oggpage ) )
            {
                p_ogg->i_streams++;
                p_ogg->pp_stream =
                    realloc( p_ogg->pp_stream, p_ogg->i_streams *
                             sizeof(logical_stream_t *) );

#define p_stream p_ogg->pp_stream[p_ogg->i_streams - 1]

                p_stream = malloc( sizeof(logical_stream_t) );
                memset( p_stream, 0, sizeof(logical_stream_t) );

                /* Setup the logical stream */
                p_stream->i_serial_no = ogg_page_serialno( &oggpage );
                ogg_stream_init( &p_stream->os, p_stream->i_serial_no );

                /* Extract the initial header from the first page and verify
                 * the codec type of tis Ogg bitstream */
                if( ogg_stream_pagein( &p_stream->os, &oggpage ) < 0 )
                {
                    /* error. stream version mismatch perhaps */
                    msg_Err( p_input, "Error reading first page of "
                             "Ogg bitstream data" );
                    return VLC_EGENERIC;
                }

                /* FIXME: check return value */
                ogg_stream_packetpeek( &p_stream->os, &oggpacket );

                /* Check for Vorbis header */
                if( oggpacket.bytes >= 7 &&
                    ! strncmp( &oggpacket.packet[1], "vorbis", 6 ) )
                {
                    oggpack_buffer opb;

                    msg_Dbg( p_input, "found vorbis header" );
                    p_stream->i_cat = AUDIO_ES;
                    p_stream->i_fourcc = VLC_FOURCC( 'v','o','r','b' );

Gildas Bazin's avatar
 
Gildas Bazin committed
530 531 532 533 534
                    /* Signal that we want to keep a backup of the vorbis
                     * stream headers. They will be used when switching between
                     * audio streams. */
                    p_stream->b_force_backup = 1;

Gildas Bazin's avatar
 
Gildas Bazin committed
535 536
                    /* Cheat and get additionnal info ;) */
                    oggpack_readinit( &opb, oggpacket.packet, oggpacket.bytes);
Gildas Bazin's avatar
 
Gildas Bazin committed
537
                    oggpack_adv( &opb, 96 );
Gildas Bazin's avatar
 
Gildas Bazin committed
538
                    p_stream->f_rate = oggpack_read( &opb, 32 );
Gildas Bazin's avatar
 
Gildas Bazin committed
539 540 541
                    oggpack_adv( &opb, 32 );
                    p_stream->i_bitrate = oggpack_read( &opb, 32 );
                }
Gildas Bazin's avatar
 
Gildas Bazin committed
542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616
                /* Check for Theora header */
                else if( oggpacket.bytes >= 7 &&
                         ! strncmp( &oggpacket.packet[1], "theora", 6 ) )
                {
#ifdef HAVE_OGGPACKB
                    oggpack_buffer opb;
                    int i_fps_numerator;
                    int i_fps_denominator;
                    int i_keyframe_frequency_force;
#endif

                    msg_Dbg( p_input, "found theora header" );
#ifdef HAVE_OGGPACKB
                    p_stream->i_cat = VIDEO_ES;
                    p_stream->i_fourcc = VLC_FOURCC( 't','h','e','o' );

                    /* Cheat and get additionnal info ;) */
                    oggpackB_readinit(&opb, oggpacket.packet, oggpacket.bytes);
                    oggpackB_adv( &opb, 56 );
                    oggpackB_read( &opb, 8 ); /* major version num */
                    oggpackB_read( &opb, 8 ); /* minor version num */
                    oggpackB_read( &opb, 8 ); /* subminor version num */
                    oggpackB_read( &opb, 16 ) /*<< 4*/; /* width */
                    oggpackB_read( &opb, 16 ) /*<< 4*/; /* height */
                    i_fps_numerator = oggpackB_read( &opb, 32 );
                    i_fps_denominator = oggpackB_read( &opb, 32 );
                    oggpackB_read( &opb, 24 ); /* aspect_numerator */
                    oggpackB_read( &opb, 24 ); /* aspect_denominator */
                    i_keyframe_frequency_force = 1 << oggpackB_read( &opb, 5 );
                    p_stream->i_bitrate = oggpackB_read( &opb, 24 );
                    oggpackB_read(&opb,6); /* quality */

                    /* granule_shift = i_log( frequency_force -1 ) */
                    p_stream->i_theora_keyframe_granule_shift = 0;
                    i_keyframe_frequency_force--;
                    while( i_keyframe_frequency_force )
                    {
                        p_stream->i_theora_keyframe_granule_shift++;
                        i_keyframe_frequency_force >>= 1;
                    }

                    p_stream->f_rate = (float)i_fps_numerator /
                                                i_fps_denominator;
                    msg_Dbg( p_input,
                             "found theora header, bitrate: %i, rate: %f",
                             p_stream->i_bitrate, p_stream->f_rate );
#else /* HAVE_OGGPACKB */
                    msg_Dbg( p_input, "the ogg demuxer has been compiled "
                             "without support for the oggpackB extension."
                             "The theora stream won't be decoded." );
                    free( p_stream );
                    p_ogg->i_streams--;
                    continue;
#endif /* HAVE_OGGPACKB */
                }
                /* Check for Tarkin header */
                else if( oggpacket.bytes >= 7 &&
                         ! strncmp( &oggpacket.packet[1], "tarkin", 6 ) )
                {
                    oggpack_buffer opb;

                    msg_Dbg( p_input, "found tarkin header" );
                    p_stream->i_cat = VIDEO_ES;
                    p_stream->i_fourcc = VLC_FOURCC( 't','a','r','k' );

                    /* Cheat and get additionnal info ;) */
                    oggpack_readinit( &opb, oggpacket.packet, oggpacket.bytes);
                    oggpack_adv( &opb, 88 );
                    oggpack_adv( &opb, 104 );
                    p_stream->i_bitrate = oggpack_read( &opb, 32 );
                    p_stream->f_rate = 2; /* FIXME */
                    msg_Dbg( p_input,
                             "found tarkin header, bitrate: %i, rate: %f",
                             p_stream->i_bitrate, p_stream->f_rate );
                }
Gildas Bazin's avatar
 
Gildas Bazin committed
617 618 619 620 621 622 623 624 625 626 627 628 629 630
                else if( (*oggpacket.packet & PACKET_TYPE_BITS )
                         == PACKET_TYPE_HEADER && 
                         oggpacket.bytes >= (int)sizeof(stream_header)+1 )
                {
                    stream_header *st = (stream_header *)(oggpacket.packet+1);

                    /* Check for video header (new format) */
                    if( !strncmp( st->streamtype, "video", 5 ) )
                    {
                        p_stream->i_cat = VIDEO_ES;

                        /* We need to get rid of the header packet */
                        ogg_stream_packetout( &p_stream->os, &oggpacket );

Gildas Bazin's avatar
 
Gildas Bazin committed
631 632 633 634 635 636 637 638 639
                        p_stream->p_bih = (BITMAPINFOHEADER *)
                            malloc( sizeof(BITMAPINFOHEADER) );
                        if( !p_stream->p_bih )
                        {
                            /* Mem allocation error, just ignore the stream */
                            free( p_stream );
                            p_ogg->i_streams--;
                            continue;
                        }
Gildas Bazin's avatar
 
Gildas Bazin committed
640 641 642 643 644 645 646 647 648
                        p_stream->p_bih->biSize = sizeof(BITMAPINFOHEADER);
                        p_stream->p_bih->biCompression=
                            p_stream->i_fourcc = VLC_FOURCC( st->subtype[0],
                                                             st->subtype[1],
                                                             st->subtype[2],
                                                             st->subtype[3] );
                        msg_Dbg( p_input, "found video header of type: %.4s",
                                 (char *)&p_stream->i_fourcc );

Gildas Bazin's avatar
 
Gildas Bazin committed
649
                        p_stream->f_rate = 10000000.0 /
Gildas Bazin's avatar
 
Gildas Bazin committed
650 651 652 653 654 655 656
                            GetQWLE((uint8_t *)&st->time_unit);
                        p_stream->p_bih->biBitCount =
                            GetWLE((uint8_t *)&st->bits_per_sample);
                        p_stream->p_bih->biWidth =
                            GetDWLE((uint8_t *)&st->sh.video.width);
                        p_stream->p_bih->biHeight =
                            GetDWLE((uint8_t *)&st->sh.video.height);
Gildas Bazin's avatar
 
Gildas Bazin committed
657 658 659 660 661 662 663 664
                        p_stream->p_bih->biPlanes= 1 ;
                        p_stream->p_bih->biSizeImage =
                            (p_stream->p_bih->biBitCount >> 3) *
                            p_stream->p_bih->biWidth *
                            p_stream->p_bih->biHeight;

                        msg_Dbg( p_input,
                             "fps: %f, width:%i; height:%i, bitcount:%i",
Gildas Bazin's avatar
 
Gildas Bazin committed
665
                            p_stream->f_rate, p_stream->p_bih->biWidth,
Gildas Bazin's avatar
 
Gildas Bazin committed
666 667
                            p_stream->p_bih->biHeight,
                            p_stream->p_bih->biBitCount);
Gildas Bazin's avatar
 
Gildas Bazin committed
668

Gildas Bazin's avatar
 
Gildas Bazin committed
669
                        p_stream->i_bitrate = 0;
Gildas Bazin's avatar
 
Gildas Bazin committed
670 671 672 673 674 675 676 677 678 679 680 681
                    }
                    /* Check for audio header (new format) */
                    else if( !strncmp( st->streamtype, "audio", 5 ) )
                    {
                        char p_buffer[5];

                        p_stream->i_cat = AUDIO_ES;

                        /* We need to get rid of the header packet */
                        ogg_stream_packetout( &p_stream->os, &oggpacket );

                        p_stream->p_wf = (WAVEFORMATEX *)
Gildas Bazin's avatar
 
Gildas Bazin committed
682 683 684 685 686 687 688 689
                            malloc( sizeof(WAVEFORMATEX) );
                        if( !p_stream->p_wf )
                        {
                            /* Mem allocation error, just ignore the stream */
                            free( p_stream );
                            p_ogg->i_streams--;
                            continue;
                        }
Gildas Bazin's avatar
 
Gildas Bazin committed
690

Gildas Bazin's avatar
 
Gildas Bazin committed
691 692
                        memcpy( p_buffer, st->subtype, 4 );
                        p_buffer[4] = '\0';
Gildas Bazin's avatar
 
Gildas Bazin committed
693
                        p_stream->p_wf->wFormatTag = strtol(p_buffer,NULL,16);
Gildas Bazin's avatar
 
Gildas Bazin committed
694 695
                        p_stream->p_wf->nChannels =
                            GetWLE((uint8_t *)&st->sh.audio.channels);
Gildas Bazin's avatar
 
Gildas Bazin committed
696
                        p_stream->f_rate = p_stream->p_wf->nSamplesPerSec =
Gildas Bazin's avatar
 
Gildas Bazin committed
697
                            GetQWLE((uint8_t *)&st->samples_per_unit);
Gildas Bazin's avatar
 
Gildas Bazin committed
698
                        p_stream->i_bitrate = p_stream->p_wf->nAvgBytesPerSec =
Gildas Bazin's avatar
 
Gildas Bazin committed
699
                            GetDWLE((uint8_t *)&st->sh.audio.avgbytespersec);
Gildas Bazin's avatar
 
Gildas Bazin committed
700
                        p_stream->i_bitrate *= 8;
Gildas Bazin's avatar
 
Gildas Bazin committed
701 702 703 704 705
                        p_stream->p_wf->nBlockAlign =
                            GetWLE((uint8_t *)&st->sh.audio.blockalign);
                        p_stream->p_wf->wBitsPerSample =
                            GetWLE((uint8_t *)&st->bits_per_sample);
                        p_stream->p_wf->cbSize = 0;
Gildas Bazin's avatar
 
Gildas Bazin committed
706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745

                        switch( p_stream->p_wf->wFormatTag )
                        {
                        case WAVE_FORMAT_PCM:
                            p_stream->i_fourcc =
                                VLC_FOURCC( 'a', 'r', 'a', 'w' );
                            break;
                        case WAVE_FORMAT_MPEG:
                        case WAVE_FORMAT_MPEGLAYER3:
                            p_stream->i_fourcc =
                                VLC_FOURCC( 'm', 'p', 'g', 'a' );
                            break;
                        case WAVE_FORMAT_A52:
                            p_stream->i_fourcc =
                                VLC_FOURCC( 'a', '5', '2', ' ' );
                            break;
                        case WAVE_FORMAT_WMA1:
                            p_stream->i_fourcc =
                                VLC_FOURCC( 'w', 'm', 'a', '1' );
                            break;
                        case WAVE_FORMAT_WMA2:
                            p_stream->i_fourcc =
                                VLC_FOURCC( 'w', 'm', 'a', '2' );
                            break;
                        default:
                            p_stream->i_fourcc = VLC_FOURCC( 'm', 's',
                                ( p_stream->p_wf->wFormatTag >> 8 ) & 0xff,
                                p_stream->p_wf->wFormatTag & 0xff );
                        }

                        msg_Dbg( p_input, "found audio header of type: %.4s",
                                 (char *)&p_stream->i_fourcc );
                        msg_Dbg( p_input, "audio:0x%4.4x channels:%d %dHz "
                                 "%dbits/sample %dkb/s",
                                 p_stream->p_wf->wFormatTag,
                                 p_stream->p_wf->nChannels,
                                 p_stream->p_wf->nSamplesPerSec,
                                 p_stream->p_wf->wBitsPerSample,
                                 p_stream->p_wf->nAvgBytesPerSec * 8 / 1024 );
                    }
Gildas Bazin's avatar
 
Gildas Bazin committed
746 747 748
                    /* Check for text (subtitles) header */
                    else if( !strncmp(st->streamtype, "text", 4) )
                    {
Gildas Bazin's avatar
 
Gildas Bazin committed
749 750 751
                        /* We need to get rid of the header packet */
                        ogg_stream_packetout( &p_stream->os, &oggpacket );

Gildas Bazin's avatar
 
Gildas Bazin committed
752 753 754 755
                        msg_Dbg( p_input, "found text subtitles header" );
                        p_stream->i_cat = SPU_ES;
                        p_stream->i_fourcc =
                            VLC_FOURCC( 's', 'u', 'b', 't' );
Gildas Bazin's avatar
 
Gildas Bazin committed
756
                        p_stream->f_rate = 1000; /* granulepos is in milisec */
Gildas Bazin's avatar
 
Gildas Bazin committed
757
                    }
Gildas Bazin's avatar
 
Gildas Bazin committed
758 759 760 761 762 763 764 765
                    else
                    {
                        msg_Dbg( p_input, "stream %d has a header marker "
                            "but is of an unknown type", p_ogg->i_streams-1 );
                        free( p_stream );
                        p_ogg->i_streams--;
                    }
                }
Gildas Bazin's avatar
 
Gildas Bazin committed
766 767
                else
                {
Gildas Bazin's avatar
 
Gildas Bazin committed
768 769
                    msg_Dbg( p_input, "stream %d is of unknown type",
                             p_ogg->i_streams-1 );
Gildas Bazin's avatar
 
Gildas Bazin committed
770 771
                    free( p_stream );
                    p_ogg->i_streams--;
Gildas Bazin's avatar
 
Gildas Bazin committed
772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854
                }

#undef p_stream

                if( Ogg_ReadPage( p_input, p_ogg, &oggpage ) != VLC_SUCCESS )
                    return VLC_EGENERIC;
            }

            /* This is the first data page, which means we are now finished
             * with the initial pages. We just need to store it in the relevant
             * bitstream. */
            for( i_stream = 0; i_stream < p_ogg->i_streams; i_stream++ )
            {
                if( ogg_stream_pagein( &p_ogg->pp_stream[i_stream]->os,
                                       &oggpage ) == 0 )
                {
                    break;
                }
            }
            return VLC_SUCCESS;
        }
    }
    return VLC_EGENERIC;
}

/*****************************************************************************
 * Activate: initializes ogg demux structures
 *****************************************************************************/
static int Activate( vlc_object_t * p_this )
{
    int i_stream, b_forced;
    demux_sys_t    *p_ogg;
    input_thread_t *p_input = (input_thread_t *)p_this;

    p_input->p_demux_data = NULL;
    b_forced = ( ( *p_input->psz_demux )&&
                 ( !strncmp( p_input->psz_demux, "ogg", 10 ) ) ) ? 1 : 0;

    /* Check if we are dealing with an ogg stream */
    if( !b_forced && ( Ogg_Check( p_input ) != VLC_SUCCESS ) )
        return -1;

    /* Allocate p_ogg */
    if( !( p_ogg = malloc( sizeof( demux_sys_t ) ) ) )
    {
        msg_Err( p_input, "out of memory" );
        goto error;
    }
    memset( p_ogg, 0, sizeof( demux_sys_t ) );
    p_input->p_demux_data = p_ogg;

    p_ogg->i_pcr  = 0;
    p_ogg->b_seekable = ( ( p_input->stream.b_seekable )
                        &&( p_input->stream.i_method == INPUT_METHOD_FILE ) );

    /* Initialize the Ogg physical bitstream parser */
    ogg_sync_init( &p_ogg->oy );

    /* Find the logical streams embedded in the physical stream and
     * initialize our p_ogg structure. */
    if( Ogg_FindLogicalStreams( p_input, p_ogg ) != VLC_SUCCESS )
    {
        msg_Err( p_input, "couldn't find an ogg logical stream" );
        goto error;
    }

    /* Set the demux function */
    p_input->pf_demux = Demux;

    /* Initialize access plug-in structures. */
    if( p_input->i_mtu == 0 )
    {
        /* Improve speed. */
        p_input->i_bufsize = INPUT_DEFAULT_BUFSIZE;
    }

    /* Create one program */
    vlc_mutex_lock( &p_input->stream.stream_lock );
    if( input_InitStream( p_input, 0 ) == -1)
    {
        vlc_mutex_unlock( &p_input->stream.stream_lock );
        msg_Err( p_input, "cannot init stream" );
        goto error;
Gildas Bazin's avatar
 
Gildas Bazin committed
855
    }
Gildas Bazin's avatar
 
Gildas Bazin committed
856 857 858 859 860 861 862
    if( input_AddProgram( p_input, 0, 0) == NULL )
    {
        vlc_mutex_unlock( &p_input->stream.stream_lock );
        msg_Err( p_input, "cannot add program" );
        goto error;
    }
    p_input->stream.p_selected_program = p_input->stream.pp_programs[0];
Gildas Bazin's avatar
 
Gildas Bazin committed
863 864
    p_input->stream.i_mux_rate = 0;
    vlc_mutex_unlock( &p_input->stream.stream_lock );
Gildas Bazin's avatar
 
Gildas Bazin committed
865 866 867 868 869 870 871 872

    for( i_stream = 0 ; i_stream < p_ogg->i_streams; i_stream++ )
    {
#define p_stream p_ogg->pp_stream[i_stream]
        vlc_mutex_lock( &p_input->stream.stream_lock );
        p_stream->p_es = input_AddES( p_input,
                                      p_input->stream.p_selected_program,
                                      p_ogg->i_streams + 1, 0 );
Gildas Bazin's avatar
 
Gildas Bazin committed
873
        p_input->stream.i_mux_rate += (p_stream->i_bitrate / ( 8 * 50 ));
Gildas Bazin's avatar
 
Gildas Bazin committed
874
        vlc_mutex_unlock( &p_input->stream.stream_lock );
Gildas Bazin's avatar
 
Gildas Bazin committed
875
        p_stream->p_es->i_stream_id = p_stream->p_es->i_id = i_stream;
Gildas Bazin's avatar
 
Gildas Bazin committed
876 877
        p_stream->p_es->i_fourcc = p_stream->i_fourcc;
        p_stream->p_es->i_cat = p_stream->i_cat;
Gildas Bazin's avatar
 
Gildas Bazin committed
878 879
        p_stream->p_es->p_demux_data = p_stream->p_bih ?
            (void *)p_stream->p_bih : (void *)p_stream->p_wf;
Gildas Bazin's avatar
 
Gildas Bazin committed
880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897
#undef p_stream
    }

    for( i_stream = 0; i_stream < p_ogg->i_streams; i_stream++ )
    {
#define p_stream  p_ogg->pp_stream[i_stream]
        switch( p_stream->p_es->i_cat )
        {
            case( VIDEO_ES ):
                if( (p_ogg->p_stream_video == NULL) )
                {
                    p_ogg->p_stream_video = p_stream;
                    /* TODO add test to see if a decoder has been found */
                    Ogg_StreamStart( p_input, p_ogg, i_stream );
                }
                break;

            case( AUDIO_ES ):
Gildas Bazin's avatar
 
Gildas Bazin committed
898
                if( (p_ogg->p_stream_audio == NULL) )
Gildas Bazin's avatar
 
Gildas Bazin committed
899
                {
Gildas Bazin's avatar
 
Gildas Bazin committed
900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925
                    int i_audio = config_GetInt( p_input, "audio-channel" );
                    if( i_audio == i_stream || i_audio <= 0 ||
                        i_audio >= p_ogg->i_streams ||
                        p_ogg->pp_stream[i_audio]->p_es->i_cat != AUDIO_ES )
                    {
                        p_ogg->p_stream_audio = p_stream;
                        Ogg_StreamStart( p_input, p_ogg, i_stream );
                    }
                }
                break;

            case( SPU_ES ):
                if( (p_ogg->p_stream_spu == NULL) )
                {
                    /* for spu, default is none */
                    int i_spu = config_GetInt( p_input, "spu-channel" );
                    if( i_spu < 0 || i_spu >= p_ogg->i_streams ||
                        p_ogg->pp_stream[i_spu]->p_es->i_cat != SPU_ES )
                    {
                        break;
                    }
                    else if( i_spu == i_stream )
                    {
                        p_ogg->p_stream_spu = p_stream;
                        Ogg_StreamStart( p_input, p_ogg, i_stream );
                    }
Gildas Bazin's avatar
 
Gildas Bazin committed
926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947
                }
                break;

            default:
                break;
        }
#undef p_stream
    }

    /* we select the first audio and video ES */
    vlc_mutex_lock( &p_input->stream.stream_lock );
    if( !p_ogg->p_stream_video )
    {
        msg_Warn( p_input, "no video stream found" );
    }
    if( !p_ogg->p_stream_audio )
    {
        msg_Warn( p_input, "no audio stream found!" );
    }
    p_input->stream.p_selected_program->b_is_ok = 1;
    vlc_mutex_unlock( &p_input->stream.stream_lock );

Gildas Bazin's avatar
 
Gildas Bazin committed
948 949 950 951 952
    /* Call the pace control */
    input_ClockManageRef( p_input,
                          p_input->stream.p_selected_program,
                          p_ogg->i_pcr );

Gildas Bazin's avatar
 
Gildas Bazin committed
953 954 955 956 957 958 959 960 961 962 963 964 965 966 967
    return 0;

 error:
    Deactivate( (vlc_object_t *)p_input );
    return -1;

}

/*****************************************************************************
 * Deactivate: frees unused data
 *****************************************************************************/
static void Deactivate( vlc_object_t *p_this )
{
    input_thread_t *p_input = (input_thread_t *)p_this;
    demux_sys_t *p_ogg = (demux_sys_t *)p_input->p_demux_data  ; 
Gildas Bazin's avatar
 
Gildas Bazin committed
968
    int i, j;
Gildas Bazin's avatar
 
Gildas Bazin committed
969 970 971 972 973 974 975 976 977

    if( p_ogg )
    {
        /* Cleanup the bitstream parser */
        ogg_sync_clear( &p_ogg->oy );

        for( i = 0; i < p_ogg->i_streams; i++ )
        {
            ogg_stream_clear( &p_ogg->pp_stream[i]->os );
Gildas Bazin's avatar
 
Gildas Bazin committed
978 979 980 981
            for( j = 0; j < p_ogg->pp_stream[i]->i_packets_backup; j++ )
            {
                free( p_ogg->pp_stream[i]->p_packets_backup[j].packet );
            }
Gildas Bazin's avatar
 
Gildas Bazin committed
982 983 984 985 986 987 988 989
            if( p_ogg->pp_stream[i]->p_packets_backup)
                free( p_ogg->pp_stream[i]->p_packets_backup );
#if 0 /* hmmm, it's already freed in input_DelES() */
            if( p_ogg->pp_stream[i]->p_bih )
                free( p_ogg->pp_stream[i]->p_bih );
            if( p_ogg->pp_stream[i]->p_wf )
                free( p_ogg->pp_stream[i]->p_wf );
#endif
Gildas Bazin's avatar
 
Gildas Bazin committed
990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004
            free( p_ogg->pp_stream[i] );
        }
        if( p_ogg->pp_stream ) free( p_ogg->pp_stream );

        free( p_ogg );
    }
}

/*****************************************************************************
 * Demux: reads and demuxes data packets
 *****************************************************************************
 * Returns -1 in case of error, 0 in case of EOF, 1 otherwise
 *****************************************************************************/
static int Demux( input_thread_t * p_input )
{
Gildas Bazin's avatar
 
Gildas Bazin committed
1005
    int i, i_stream, b_eos = 0;
Gildas Bazin's avatar
 
Gildas Bazin committed
1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029
    ogg_page    oggpage;
    ogg_packet  oggpacket;
    demux_sys_t *p_ogg  = (demux_sys_t *)p_input->p_demux_data;

#define p_stream p_ogg->pp_stream[i_stream]
    /* detect new selected/unselected streams */
    for( i_stream = 0; i_stream < p_ogg->i_streams; i_stream++ )
    {
        if( p_stream->p_es )
        {
            if( p_stream->p_es->p_decoder_fifo &&
                !p_stream->i_activated )
            {
                Ogg_StreamStart( p_input, p_ogg, i_stream );
            }
            else
            if( !p_stream->p_es->p_decoder_fifo &&
                p_stream->i_activated )
            {
                Ogg_StreamStop( p_input, p_ogg, i_stream );
            }
        }
    }

Gildas Bazin's avatar
 
Gildas Bazin committed
1030
    /* search for new video and audio stream to select
Gildas Bazin's avatar
 
Gildas Bazin committed
1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060
     * if current have been unselected */
    if( ( !p_ogg->p_stream_video )
            || ( !p_ogg->p_stream_video->p_es->p_decoder_fifo ) )
    {
        p_ogg->p_stream_video = NULL;
        for( i_stream = 0; i_stream < p_ogg->i_streams; i_stream++ )
        {
            if( ( p_stream->i_cat == VIDEO_ES )
                  &&( p_stream->p_es->p_decoder_fifo ) )
            {
                p_ogg->p_stream_video = p_stream;
                break;
            }
        }
    }
    if( ( !p_ogg->p_stream_audio )
            ||( !p_ogg->p_stream_audio->p_es->p_decoder_fifo ) )
    {
        p_ogg->p_stream_audio = NULL;
        for( i_stream = 0; i_stream < p_ogg->i_streams; i_stream++ )
        {
            if( ( p_stream->i_cat == AUDIO_ES )
                  &&( p_stream->p_es->p_decoder_fifo ) )
            {
                p_ogg->p_stream_audio = p_stream;
                break;
            }
        }
    }

Gildas Bazin's avatar
 
Gildas Bazin committed
1061
    if( p_input->stream.p_selected_program->i_synchro_state == SYNCHRO_REINIT )
Gildas Bazin's avatar
 
Gildas Bazin committed
1062 1063
    {
        msg_Warn( p_input, "synchro reinit" );
Gildas Bazin's avatar
 
Gildas Bazin committed
1064 1065 1066 1067 1068 1069 1070 1071 1072

        /* An ogg packet does only contain the starting date of the next
         * packet, not its own starting date.
         * As a quick work around, we just skip an oggpage */

        for( i_stream = 0; i_stream < p_ogg->i_streams; i_stream++ )
        {
            /* we'll trash all the data until we find the next pcr */
            p_stream->b_reinit = 1;
Gildas Bazin's avatar
 
Gildas Bazin committed
1073 1074
            p_stream->i_pcr = -1;
            p_stream->i_interpolated_pcr = -1;
Gildas Bazin's avatar
 
Gildas Bazin committed
1075
        }
Gildas Bazin's avatar
 
Gildas Bazin committed
1076
        p_ogg->b_reinit = 1;
Gildas Bazin's avatar
 
Gildas Bazin committed
1077 1078 1079
    }


Gildas Bazin's avatar
 
Gildas Bazin committed
1080 1081 1082
    /*
     * Demux ogg pages from the stream
     */
Gildas Bazin's avatar
 
Gildas Bazin committed
1083
    for( i = 0; i < PAGES_READ_ONCE || p_ogg->b_reinit;  i++ )
Gildas Bazin's avatar
 
Gildas Bazin committed
1084
    {
Gildas Bazin's avatar
 
Gildas Bazin committed
1085
        if( Ogg_ReadPage( p_input, p_ogg, &oggpage ) != VLC_SUCCESS )
Gildas Bazin's avatar
 
Gildas Bazin committed
1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097
        {
            b_eos = 1;
            break;
        }

        for( i_stream = 0; i_stream < p_ogg->i_streams; i_stream++ )
        {
            if( ogg_stream_pagein( &p_stream->os, &oggpage ) != 0 )
                continue;

            while( ogg_stream_packetout( &p_stream->os, &oggpacket ) > 0 )
            {
Gildas Bazin's avatar
 
Gildas Bazin committed
1098
                if( !p_stream->p_es )
Gildas Bazin's avatar
 
Gildas Bazin committed
1099 1100 1101 1102
                {
                    break;
                }

Gildas Bazin's avatar
 
Gildas Bazin committed
1103 1104 1105 1106 1107 1108
                if( p_stream->b_reinit )
                {
                    if( oggpacket.granulepos >= 0 )
                    {
                        p_stream->b_reinit = 0;

Gildas Bazin's avatar
 
Gildas Bazin committed
1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124
                        /* Convert the next granulepos into a pcr */
                        Ogg_UpdatePCR( p_stream, &oggpacket );

                        /* Call the pace control to reinitialize
                         * the system clock */
                         input_ClockManageRef( p_input,
                             p_input->stream.p_selected_program,
                             p_stream->i_pcr );

                         if( (!p_ogg->p_stream_video ||
                              !p_ogg->p_stream_video->b_reinit) &&
                             (!p_ogg->p_stream_audio ||
                              !p_ogg->p_stream_audio->b_reinit) )
                         {
                             p_ogg->b_reinit = 0;
                         }
Gildas Bazin's avatar
 
Gildas Bazin committed
1125 1126 1127
                    }
                    continue;
                }
Gildas Bazin's avatar
 
Gildas Bazin committed
1128 1129

                Ogg_DecodePacket( p_input, p_stream, &oggpacket );
Gildas Bazin's avatar
 
Gildas Bazin committed
1130

Gildas Bazin's avatar
 
Gildas Bazin committed
1131 1132 1133 1134
            }
        }
    }

Gildas Bazin's avatar
 
Gildas Bazin committed
1135 1136 1137
    i_stream = 0;
    p_ogg->i_pcr = p_stream->i_interpolated_pcr;
    for( ; i_stream < p_ogg->i_streams; i_stream++ )
Gildas Bazin's avatar
 
Gildas Bazin committed
1138 1139 1140 1141
    {
        if( p_stream->i_cat == SPU_ES )
            continue;

Gildas Bazin's avatar
 
Gildas Bazin committed
1142
        if( p_stream->i_interpolated_pcr < p_ogg->i_pcr )
Gildas Bazin's avatar
 
Gildas Bazin committed
1143 1144 1145 1146 1147
            p_ogg->i_pcr = p_stream->i_interpolated_pcr;
    }
#undef p_stream


Gildas Bazin's avatar
 
Gildas Bazin committed
1148
    /* Call the pace control */
Gildas Bazin's avatar
 
Gildas Bazin committed
1149 1150
    input_ClockManageRef( p_input, p_input->stream.p_selected_program,
                          p_ogg->i_pcr );
Gildas Bazin's avatar
 
Gildas Bazin committed
1151

Gildas Bazin's avatar
 
Gildas Bazin committed
1152 1153 1154
    /* Did we reach the end of stream ? */
    return( b_eos ? 0 : 1 );
}