git.sesse.net Git - vlc/blob - src/input/decoder.c

   1 /*****************************************************************************
   2  * decoder.c: Functions for the management of decoders
   3  *****************************************************************************
   4  * Copyright (C) 1999-2004 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Christophe Massiot <massiot@via.ecp.fr>
   8  *          Gildas Bazin <gbazin@videolan.org>
   9  *          Laurent Aimar <fenrir@via.ecp.fr>
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation; either version 2 of the License, or
  14  * (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program; if not, write to the Free Software
  23  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  24  *****************************************************************************/
  25
  26 /*****************************************************************************
  27  * Preamble
  28  *****************************************************************************/
  29 #ifdef HAVE_CONFIG_H
  30 # include "config.h"
  31 #endif
  32 #include <assert.h>
  33
  34 #include <vlc_common.h>
  35
  36 #include <vlc_block.h>
  37 #include <vlc_vout.h>
  38 #include <vlc_aout.h>
  39 #include <vlc_sout.h>
  40 #include <vlc_codec.h>
  41 #include <vlc_osd.h>
  42
  43 #include <vlc_interface.h>
  44 #include "audio_output/aout_internal.h"
  45 #include "stream_output/stream_output.h"
  46 #include "input_internal.h"
  47
  48 static decoder_t * CreateDecoder( input_thread_t *, es_format_t *, int );
  49 static void        DeleteDecoder( decoder_t * );
  50
  51 static int         DecoderThread( decoder_t * );
  52 static int         DecoderDecode( decoder_t * p_dec, block_t *p_block );
  53
  54 /* Buffers allocation callbacks for the decoders */
  55 static aout_buffer_t *aout_new_buffer( decoder_t *, int );
  56 static void aout_del_buffer( decoder_t *, aout_buffer_t * );
  57
  58 static picture_t *vout_new_buffer( decoder_t * );
  59 static void vout_del_buffer( decoder_t *, picture_t * );
  60 static void vout_link_picture( decoder_t *, picture_t * );
  61 static void vout_unlink_picture( decoder_t *, picture_t * );
  62
  63 static subpicture_t *spu_new_buffer( decoder_t * );
  64 static void spu_del_buffer( decoder_t *, subpicture_t * );
  65
  66 static es_format_t null_es_format;
  67
  68 struct decoder_owner_sys_t
  69 {
  70     bool      b_own_thread;
  71
  72     int64_t         i_preroll_end;
  73
  74     input_thread_t  *p_input;
  75
  76     aout_instance_t *p_aout;
  77     aout_input_t    *p_aout_input;
  78
  79     vout_thread_t   *p_vout;
  80
  81     vout_thread_t   *p_spu_vout;
  82     int              i_spu_channel;
  83
  84     sout_instance_t         *p_sout;
  85     sout_packetizer_input_t *p_sout_input;
  86
  87     /* Some decoders require already packetized data (ie. not truncated) */
  88     decoder_t *p_packetizer;
  89
  90     /* Current format in use by the output */
  91     video_format_t video;
  92     audio_format_t audio;
  93     es_format_t    sout;
  94
  95     /* fifo */
  96     block_fifo_t *p_fifo;
  97
  98     /* CC */
  99     bool b_cc_supported;
 100     vlc_mutex_t lock_cc;
 101     bool pb_cc_present[4];
 102     decoder_t *pp_cc[4];
 103 };
 104
 105 /* */
 106 static void DecoderUnsupportedCodec( decoder_t *p_dec, vlc_fourcc_t codec )
 107 {
 108     msg_Err( p_dec, "no suitable decoder module for fourcc `%4.4s'.\n"
 109              "VLC probably does not support this sound or video format.",
 110              (char*)&codec );
 111     intf_UserFatal( p_dec, false, _("No suitable decoder module"),
 112                     _("VLC does not support the audio or video format \"%4.4s\". "
 113                       "Unfortunately there is no way for you to fix this."), (char*)&codec );
 114 }
 115
 116 /* decoder_GetInputAttachment:
 117  */
 118 input_attachment_t *decoder_GetInputAttachment( decoder_t *p_dec,
 119                                                 const char *psz_name )
 120 {
 121     input_attachment_t *p_attachment;
 122     if( input_Control( p_dec->p_owner->p_input, INPUT_GET_ATTACHMENT, &p_attachment, psz_name ) )
 123         return NULL;
 124     return p_attachment;
 125 }
 126 /* decoder_GetInputAttachments:
 127  */
 128 int decoder_GetInputAttachments( decoder_t *p_dec,
 129                                  input_attachment_t ***ppp_attachment,
 130                                  int *pi_attachment )
 131 {
 132     return input_Control( p_dec->p_owner->p_input, INPUT_GET_ATTACHMENTS,
 133                           ppp_attachment, pi_attachment );
 134 }
 135 /* decoder_GetDisplayDate:
 136  */
 137 mtime_t decoder_GetDisplayDate( decoder_t *p_dec, mtime_t i_ts )
 138 {
 139     VLC_UNUSED(p_dec);
 140     return i_ts;
 141 }
 142
 143 /**
 144  * Spawns a new decoder thread
 145  *
 146  * \param p_input the input thread
 147  * \param p_es the es descriptor
 148  * \return the spawned decoder object
 149  */
 150 decoder_t *input_DecoderNew( input_thread_t *p_input,
 151                              es_format_t *fmt, bool b_force_decoder )
 152 {
 153     decoder_t   *p_dec = NULL;
 154     vlc_value_t val;
 155
 156 #ifndef ENABLE_SOUT
 157     (void)b_force_decoder;
 158 #else
 159     /* If we are in sout mode, search for packetizer module */
 160     if( p_input->p->p_sout && !b_force_decoder )
 161     {
 162         /* Create the decoder configuration structure */
 163         p_dec = CreateDecoder( p_input, fmt, VLC_OBJECT_PACKETIZER );
 164         if( p_dec == NULL )
 165         {
 166             msg_Err( p_input, "could not create packetizer" );
 167             intf_UserFatal( p_input, false, _("Streaming / Transcoding failed"),
 168                             _("VLC could not open the packetizer module.") );
 169             return NULL;
 170         }
 171     }
 172     else
 173 #endif
 174     {
 175         /* Create the decoder configuration structure */
 176         p_dec = CreateDecoder( p_input, fmt, VLC_OBJECT_DECODER );
 177         if( p_dec == NULL )
 178         {
 179             msg_Err( p_input, "could not create decoder" );
 180             intf_UserFatal( p_input, false, _("Streaming / Transcoding failed"),
 181                             _("VLC could not open the decoder module.") );
 182             return NULL;
 183         }
 184     }
 185
 186     if( !p_dec->p_module )
 187     {
 188         DecoderUnsupportedCodec( p_dec, fmt->i_codec );
 189
 190         DeleteDecoder( p_dec );
 191         vlc_object_release( p_dec );
 192         return NULL;
 193     }
 194
 195     if( p_input->p->p_sout && p_input->p->input.b_can_pace_control &&
 196         !b_force_decoder )
 197     {
 198         msg_Dbg( p_input, "stream out mode -> no decoder thread" );
 199         p_dec->p_owner->b_own_thread = false;
 200     }
 201     else
 202     {
 203         var_Get( p_input, "minimize-threads", &val );
 204         p_dec->p_owner->b_own_thread = !val.b_bool;
 205     }
 206
 207     if( p_dec->p_owner->b_own_thread )
 208     {
 209         int i_priority;
 210         if( fmt->i_cat == AUDIO_ES )
 211             i_priority = VLC_THREAD_PRIORITY_AUDIO;
 212         else
 213             i_priority = VLC_THREAD_PRIORITY_VIDEO;
 214
 215         /* Spawn the decoder thread */
 216         if( vlc_thread_create( p_dec, "decoder", DecoderThread,
 217                                i_priority, false ) )
 218         {
 219             msg_Err( p_dec, "cannot spawn decoder thread" );
 220             module_Unneed( p_dec, p_dec->p_module );
 221             DeleteDecoder( p_dec );
 222             vlc_object_release( p_dec );
 223             return NULL;
 224         }
 225     }
 226
 227     return p_dec;
 228 }
 229
 230 /**
 231  * Kills a decoder thread and waits until it's finished
 232  *
 233  * \param p_input the input thread
 234  * \param p_es the es descriptor
 235  * \return nothing
 236  */
 237 void input_DecoderDelete( decoder_t *p_dec )
 238 {
 239     vlc_object_kill( p_dec );
 240
 241     if( p_dec->p_owner->b_own_thread )
 242     {
 243         /* Make sure the thread leaves the function by
 244          * sending it an empty block. */
 245         block_t *p_block = block_New( p_dec, 0 );
 246         input_DecoderDecode( p_dec, p_block );
 247
 248         vlc_thread_join( p_dec );
 249
 250         /* Don't module_Unneed() here because of the dll loader that wants
 251          * close() in the same thread than open()/decode() */
 252     }
 253     else
 254     {
 255         /* Flush */
 256         input_DecoderDecode( p_dec, NULL );
 257
 258         module_Unneed( p_dec, p_dec->p_module );
 259     }
 260
 261     /* */
 262     if( p_dec->p_owner->b_cc_supported )
 263     {
 264         int i;
 265         for( i = 0; i < 4; i++ )
 266             input_DecoderSetCcState( p_dec, false, i );
 267     }
 268
 269     /* Delete decoder configuration */
 270     DeleteDecoder( p_dec );
 271
 272     /* Delete the decoder */
 273     vlc_object_release( p_dec );
 274 }
 275
 276 /**
 277  * Put a block_t in the decoder's fifo.
 278  *
 279  * \param p_dec the decoder object
 280  * \param p_block the data block
 281  */
 282 void input_DecoderDecode( decoder_t * p_dec, block_t *p_block )
 283 {
 284     if( p_dec->p_owner->b_own_thread )
 285     {
 286         if( p_dec->p_owner->p_input->p->b_out_pace_control )
 287         {
 288             /* FIXME !!!!! */
 289             while( !p_dec->b_die && !p_dec->b_error &&
 290                    block_FifoCount( p_dec->p_owner->p_fifo ) > 10 )
 291             {
 292                 msleep( 1000 );
 293             }
 294         }
 295         else if( block_FifoSize( p_dec->p_owner->p_fifo ) > 50000000 /* 50 MB */ )
 296         {
 297             /* FIXME: ideally we would check the time amount of data
 298              * in the fifo instead of its size. */
 299             msg_Warn( p_dec, "decoder/packetizer fifo full (data not "
 300                       "consumed quickly enough), resetting fifo!" );
 301             block_FifoEmpty( p_dec->p_owner->p_fifo );
 302         }
 303
 304         block_FifoPut( p_dec->p_owner->p_fifo, p_block );
 305     }
 306     else
 307     {
 308         if( p_dec->b_error || (p_block && p_block->i_buffer <= 0) )
 309         {
 310             if( p_block ) block_Release( p_block );
 311         }
 312         else
 313         {
 314             DecoderDecode( p_dec, p_block );
 315         }
 316     }
 317 }
 318
 319 void input_DecoderDiscontinuity( decoder_t * p_dec, bool b_flush )
 320 {
 321     block_t *p_null;
 322
 323     /* Empty the fifo */
 324     if( p_dec->p_owner->b_own_thread && b_flush )
 325         block_FifoEmpty( p_dec->p_owner->p_fifo );
 326
 327     /* Send a special block */
 328     p_null = block_New( p_dec, 128 );
 329     p_null->i_flags |= BLOCK_FLAG_DISCONTINUITY;
 330     /* FIXME check for p_packetizer or b_packitized from es_format_t of input ? */
 331     if( p_dec->p_owner->p_packetizer && b_flush )
 332         p_null->i_flags |= BLOCK_FLAG_CORRUPTED;
 333     memset( p_null->p_buffer, 0, p_null->i_buffer );
 334
 335     input_DecoderDecode( p_dec, p_null );
 336 }
 337
 338 bool input_DecoderEmpty( decoder_t * p_dec )
 339 {
 340     if( p_dec->p_owner->b_own_thread
 341      && block_FifoCount( p_dec->p_owner->p_fifo ) > 0 )
 342     {
 343         return false;
 344     }
 345     return true;
 346 }
 347
 348 void input_DecoderIsCcPresent( decoder_t *p_dec, bool pb_present[4] )
 349 {
 350     int i;
 351
 352     vlc_mutex_lock( &p_dec->p_owner->lock_cc );
 353     for( i = 0; i < 4; i++ )
 354         pb_present[i] =  p_dec->p_owner->pb_cc_present[i];
 355     vlc_mutex_unlock( &p_dec->p_owner->lock_cc );
 356 }
 357 int input_DecoderSetCcState( decoder_t *p_dec, bool b_decode, int i_channel )
 358 {
 359     decoder_owner_sys_t *p_owner = p_dec->p_owner;
 360
 361     //msg_Warn( p_dec, "input_DecoderSetCcState: %d @%d", b_decode, i_channel );
 362
 363     if( i_channel < 0 || i_channel >= 4 || !p_owner->pb_cc_present[i_channel] )
 364         return VLC_EGENERIC;
 365
 366     if( b_decode )
 367     {
 368         static const vlc_fourcc_t fcc[4] = {
 369             VLC_FOURCC('c', 'c', '1', ' '),
 370             VLC_FOURCC('c', 'c', '2', ' '),
 371             VLC_FOURCC('c', 'c', '3', ' '),
 372             VLC_FOURCC('c', 'c', '4', ' '),
 373         };
 374         decoder_t *p_cc;
 375         es_format_t fmt;
 376
 377         es_format_Init( &fmt, SPU_ES, fcc[i_channel] );
 378         p_cc = CreateDecoder( p_owner->p_input, &fmt, VLC_OBJECT_DECODER );
 379         if( !p_cc )
 380         {
 381             msg_Err( p_dec, "could not create decoder" );
 382             intf_UserFatal( p_dec, false, _("Streaming / Transcoding failed"),
 383                             _("VLC could not open the decoder module.") );
 384             return VLC_EGENERIC;
 385         }
 386         else if( !p_cc->p_module )
 387         {
 388             DecoderUnsupportedCodec( p_dec, fcc[i_channel] );
 389             DeleteDecoder( p_cc );
 390             vlc_object_release( p_cc );
 391             return VLC_EGENERIC;
 392         }
 393
 394         vlc_mutex_lock( &p_owner->lock_cc );
 395         p_dec->p_owner->pp_cc[i_channel] = p_cc;
 396         vlc_mutex_unlock( &p_owner->lock_cc );
 397     }
 398     else
 399     {
 400         decoder_t *p_cc;
 401
 402         vlc_mutex_lock( &p_owner->lock_cc );
 403         p_cc = p_dec->p_owner->pp_cc[i_channel];
 404         p_dec->p_owner->pp_cc[i_channel] = NULL;
 405         vlc_mutex_unlock( &p_dec->p_owner->lock_cc );
 406
 407         if( p_cc )
 408         {
 409             vlc_object_kill( p_cc );
 410             module_Unneed( p_cc, p_cc->p_module );
 411             DeleteDecoder( p_cc );
 412             vlc_object_release( p_cc );
 413         }
 414     }
 415     return VLC_SUCCESS;
 416 }
 417 int input_DecoderGetCcState( decoder_t *p_dec, bool *pb_decode, int i_channel )
 418 {
 419     decoder_owner_sys_t *p_owner = p_dec->p_owner;
 420
 421     *pb_decode = false;
 422     if( i_channel < 0 || i_channel >= 4 || !p_owner->pb_cc_present[i_channel] )
 423         return VLC_EGENERIC;
 424
 425     vlc_mutex_lock( &p_owner->lock_cc );
 426     *pb_decode = p_dec->p_owner->pp_cc[i_channel] != NULL;
 427     vlc_mutex_unlock( &p_dec->p_owner->lock_cc );
 428     return VLC_EGENERIC;
 429 }
 430
 431 /**
 432  * Create a decoder object
 433  *
 434  * \param p_input the input thread
 435  * \param p_es the es descriptor
 436  * \param i_object_type Object type as define in include/vlc_objects.h
 437  * \return the decoder object
 438  */
 439 static decoder_t * CreateDecoder( input_thread_t *p_input,
 440                                   es_format_t *fmt, int i_object_type )
 441 {
 442     decoder_t *p_dec;
 443     decoder_owner_sys_t *p_owner;
 444     int i;
 445
 446     p_dec = vlc_object_create( p_input, i_object_type );
 447     if( p_dec == NULL )
 448     {
 449         msg_Err( p_input, "out of memory" );
 450         return NULL;
 451     }
 452
 453     p_dec->pf_decode_audio = 0;
 454     p_dec->pf_decode_video = 0;
 455     p_dec->pf_decode_sub = 0;
 456     p_dec->pf_get_cc = 0;
 457     p_dec->pf_packetize = 0;
 458
 459     /* Initialize the decoder fifo */
 460     p_dec->p_module = NULL;
 461
 462     memset( &null_es_format, 0, sizeof(es_format_t) );
 463     es_format_Copy( &p_dec->fmt_in, fmt );
 464     es_format_Copy( &p_dec->fmt_out, &null_es_format );
 465
 466     /* Allocate our private structure for the decoder */
 467     p_dec->p_owner = p_owner = malloc( sizeof( decoder_owner_sys_t ) );
 468     if( p_dec->p_owner == NULL )
 469     {
 470         msg_Err( p_dec, "out of memory" );
 471         return NULL;
 472     }
 473     p_dec->p_owner->b_own_thread = true;
 474     p_dec->p_owner->i_preroll_end = -1;
 475     p_dec->p_owner->p_input = p_input;
 476     p_dec->p_owner->p_aout = NULL;
 477     p_dec->p_owner->p_aout_input = NULL;
 478     p_dec->p_owner->p_vout = NULL;
 479     p_dec->p_owner->p_spu_vout = NULL;
 480     p_dec->p_owner->i_spu_channel = 0;
 481     p_dec->p_owner->p_sout = p_input->p->p_sout;
 482     p_dec->p_owner->p_sout_input = NULL;
 483     p_dec->p_owner->p_packetizer = NULL;
 484
 485     /* decoder fifo */
 486     if( ( p_dec->p_owner->p_fifo = block_FifoNew() ) == NULL )
 487     {
 488         msg_Err( p_dec, "out of memory" );
 489         return NULL;
 490     }
 491
 492     /* Set buffers allocation callbacks for the decoders */
 493     p_dec->pf_aout_buffer_new = aout_new_buffer;
 494     p_dec->pf_aout_buffer_del = aout_del_buffer;
 495     p_dec->pf_vout_buffer_new = vout_new_buffer;
 496     p_dec->pf_vout_buffer_del = vout_del_buffer;
 497     p_dec->pf_picture_link    = vout_link_picture;
 498     p_dec->pf_picture_unlink  = vout_unlink_picture;
 499     p_dec->pf_spu_buffer_new  = spu_new_buffer;
 500     p_dec->pf_spu_buffer_del  = spu_del_buffer;
 501
 502     vlc_object_attach( p_dec, p_input );
 503
 504     /* Find a suitable decoder/packetizer module */
 505     if( i_object_type == VLC_OBJECT_DECODER )
 506         p_dec->p_module = module_Need( p_dec, "decoder", "$codec", 0 );
 507     else
 508         p_dec->p_module = module_Need( p_dec, "packetizer", "$packetizer", 0 );
 509
 510     /* Check if decoder requires already packetized data */
 511     if( i_object_type == VLC_OBJECT_DECODER &&
 512         p_dec->b_need_packetized && !p_dec->fmt_in.b_packetized )
 513     {
 514         p_dec->p_owner->p_packetizer =
 515             vlc_object_create( p_input, VLC_OBJECT_PACKETIZER );
 516         if( p_dec->p_owner->p_packetizer )
 517         {
 518             es_format_Copy( &p_dec->p_owner->p_packetizer->fmt_in,
 519                             &p_dec->fmt_in );
 520
 521             es_format_Copy( &p_dec->p_owner->p_packetizer->fmt_out,
 522                             &null_es_format );
 523
 524             vlc_object_attach( p_dec->p_owner->p_packetizer, p_input );
 525
 526             p_dec->p_owner->p_packetizer->p_module =
 527                 module_Need( p_dec->p_owner->p_packetizer,
 528                              "packetizer", "$packetizer", 0 );
 529
 530             if( !p_dec->p_owner->p_packetizer->p_module )
 531             {
 532                 es_format_Clean( &p_dec->p_owner->p_packetizer->fmt_in );
 533                 vlc_object_detach( p_dec->p_owner->p_packetizer );
 534                 vlc_object_release( p_dec->p_owner->p_packetizer );
 535             }
 536         }
 537     }
 538
 539     /* Copy ourself the input replay gain */
 540     if( fmt->i_cat == AUDIO_ES )
 541     {
 542         for( i = 0; i < AUDIO_REPLAY_GAIN_MAX; i++ )
 543         {
 544             if( !p_dec->fmt_out.audio_replay_gain.pb_peak[i] )
 545             {
 546                 p_dec->fmt_out.audio_replay_gain.pb_peak[i] = fmt->audio_replay_gain.pb_peak[i];
 547                 p_dec->fmt_out.audio_replay_gain.pf_peak[i] = fmt->audio_replay_gain.pf_peak[i];
 548             }
 549             if( !p_dec->fmt_out.audio_replay_gain.pb_gain[i] )
 550             {
 551                 p_dec->fmt_out.audio_replay_gain.pb_gain[i] = fmt->audio_replay_gain.pb_gain[i];
 552                 p_dec->fmt_out.audio_replay_gain.pf_gain[i] = fmt->audio_replay_gain.pf_gain[i];
 553             }
 554         }
 555     }
 556     /* */
 557     p_owner->b_cc_supported = false;
 558     if( i_object_type == VLC_OBJECT_DECODER )
 559     {
 560         if( p_owner->p_packetizer && p_owner->p_packetizer->pf_get_cc )
 561             p_owner->b_cc_supported = true;
 562         if( p_dec->pf_get_cc )
 563             p_owner->b_cc_supported = true;
 564     }
 565
 566     vlc_mutex_init( &p_owner->lock_cc );
 567     for( i = 0; i < 4; i++ )
 568     {
 569         p_owner->pb_cc_present[i] = false;
 570         p_owner->pp_cc[i] = NULL;
 571     }
 572     return p_dec;
 573 }
 574
 575 /**
 576  * The decoding main loop
 577  *
 578  * \param p_dec the decoder
 579  * \return 0
 580  */
 581 static int DecoderThread( decoder_t * p_dec )
 582 {
 583     block_t *p_block;
 584
 585     /* The decoder's main loop */
 586     while( !p_dec->b_die && !p_dec->b_error )
 587     {
 588         if( ( p_block = block_FifoGet( p_dec->p_owner->p_fifo ) ) == NULL )
 589         {
 590             p_dec->b_error = 1;
 591             break;
 592         }
 593         if( DecoderDecode( p_dec, p_block ) != VLC_SUCCESS )
 594         {
 595             break;
 596         }
 597     }
 598
 599     while( !p_dec->b_die )
 600     {
 601         /* Trash all received PES packets */
 602         p_block = block_FifoGet( p_dec->p_owner->p_fifo );
 603         if( p_block ) block_Release( p_block );
 604     }
 605
 606     /* We do it here because of the dll loader that wants close() in the
 607      * same thread than open()/decode() */
 608     module_Unneed( p_dec, p_dec->p_module );
 609
 610     return 0;
 611 }
 612
 613 static inline void DecoderUpdatePreroll( int64_t *pi_preroll, const block_t *p )
 614 {
 615     if( p->i_flags & (BLOCK_FLAG_PREROLL|BLOCK_FLAG_DISCONTINUITY) )
 616         *pi_preroll = INT64_MAX;
 617     else if( p->i_pts > 0 )
 618         *pi_preroll = __MIN( *pi_preroll, p->i_pts );
 619     else if( p->i_dts > 0 )
 620         *pi_preroll = __MIN( *pi_preroll, p->i_dts );
 621 }
 622 static void DecoderDecodeAudio( decoder_t *p_dec, block_t *p_block )
 623 {
 624     input_thread_t *p_input = p_dec->p_owner->p_input;
 625     const int i_rate = p_block->i_rate;
 626     aout_buffer_t *p_aout_buf;
 627
 628     while( (p_aout_buf = p_dec->pf_decode_audio( p_dec, &p_block )) )
 629     {
 630         vlc_mutex_lock( &p_input->p->counters.counters_lock );
 631         stats_UpdateInteger( p_dec, p_input->p->counters.p_decoded_audio, 1, NULL );
 632         vlc_mutex_unlock( &p_input->p->counters.counters_lock );
 633
 634         if( p_aout_buf->start_date < p_dec->p_owner->i_preroll_end )
 635         {
 636             aout_DecDeleteBuffer( p_dec->p_owner->p_aout,
 637                                   p_dec->p_owner->p_aout_input, p_aout_buf );
 638             continue;
 639         }
 640
 641         if( p_dec->p_owner->i_preroll_end > 0 )
 642         {
 643             /* FIXME TODO flush audio output (don't know how to do that) */
 644             msg_Dbg( p_dec, "End of audio preroll" );
 645             p_dec->p_owner->i_preroll_end = -1;
 646         }
 647         aout_DecPlay( p_dec->p_owner->p_aout,
 648                       p_dec->p_owner->p_aout_input,
 649                       p_aout_buf, i_rate );
 650     }
 651 }
 652 static void DecoderGetCc( decoder_t *p_dec, decoder_t *p_dec_cc )
 653 {
 654     block_t *p_cc;
 655     bool pb_present[4];
 656     int i;
 657     int i_cc_decoder;
 658
 659     assert( p_dec_cc->pf_get_cc != NULL );
 660
 661     /* Do not try retreiving CC if not wanted (sout) or cannot be retreived */
 662     if( !p_dec->p_owner->b_cc_supported )
 663         return;
 664
 665     p_cc = p_dec_cc->pf_get_cc( p_dec_cc, pb_present );
 666     if( !p_cc )
 667         return;
 668
 669     vlc_mutex_lock( &p_dec->p_owner->lock_cc );
 670     for( i = 0, i_cc_decoder = 0; i < 4; i++ )
 671     {
 672         p_dec->p_owner->pb_cc_present[i] |= pb_present[i];
 673         if( p_dec->p_owner->pp_cc[i] )
 674             i_cc_decoder++;
 675     }
 676
 677     for( i = 0; i < 4; i++ )
 678     {
 679         if( !p_dec->p_owner->pp_cc[i] )
 680             continue;
 681
 682         if( i_cc_decoder > 1 )
 683             DecoderDecode( p_dec->p_owner->pp_cc[i], block_Duplicate( p_cc ) );
 684         else
 685             DecoderDecode( p_dec->p_owner->pp_cc[i], p_cc );
 686         i_cc_decoder--;
 687     }
 688     vlc_mutex_unlock( &p_dec->p_owner->lock_cc );
 689 }
 690 static void VoutDisplayedPicture( vout_thread_t *p_vout, picture_t *p_pic )
 691 {
 692     vlc_mutex_lock( &p_vout->picture_lock );
 693
 694     if( p_pic->i_status == READY_PICTURE )
 695     {
 696         /* Grr cannot destroy ready picture by myself so be sure vout won't like it */
 697         p_pic->date = 1;
 698     }
 699     else if( p_pic->i_refcount > 0 )
 700     {
 701         p_pic->i_status = DISPLAYED_PICTURE;
 702     }
 703     else
 704     {
 705         p_pic->i_status = DESTROYED_PICTURE;
 706         p_vout->i_heap_size--;
 707     }
 708
 709     vlc_mutex_unlock( &p_vout->picture_lock );
 710 }
 711 static void VoutFlushPicture( vout_thread_t *p_vout )
 712 {
 713     int i;
 714     vlc_mutex_lock( &p_vout->picture_lock );
 715     for( i = 0; i < p_vout->render.i_pictures; i++ )
 716     {
 717         picture_t *p_pic = p_vout->render.pp_picture[i];
 718
 719         if( p_pic->i_status == READY_PICTURE ||
 720             p_pic->i_status == DISPLAYED_PICTURE )
 721         {
 722             /* We cannot change picture status if it is in READY_PICTURE state,
 723              * Just make sure they won't be displayed */
 724             p_pic->date = 1;
 725         }
 726     }
 727     vlc_mutex_unlock( &p_vout->picture_lock );
 728 }
 729
 730
 731 static void optimize_video_pts( decoder_t *p_dec )
 732 {
 733     picture_t * oldest_pict = NULL;
 734     picture_t * youngest_pict = NULL;
 735     int i;
 736
 737     input_thread_t * p_input = p_dec->p_owner->p_input;
 738     vout_thread_t * p_vout = p_dec->p_owner->p_vout;
 739     input_thread_private_t * p_priv = p_input->p;
 740
 741     if( !p_priv->pts_adjust.auto_adjust ) return;
 742
 743     for( i = 0; i < I_RENDERPICTURES; i++ )
 744     {
 745         picture_t * pic = PP_RENDERPICTURE[i];
 746         if( pic->i_status != READY_PICTURE )
 747             continue;
 748
 749         if( !oldest_pict || pic->date < oldest_pict->date )
 750             oldest_pict = pic;
 751         if( !youngest_pict || pic->date > youngest_pict->date )
 752             youngest_pict = pic;
 753     }
 754
 755     if( !youngest_pict || !oldest_pict )
 756         return;
 757
 758     /* Try to find if we can reduce the pts
 759      * This first draft is way to simple, and we can't say if the
 760      * algo will converge. It's also full of constants.
 761      * But this simple algo allows to reduce the latency
 762      * to the minimum.
 763      * The whole point of this, is to bypass the pts_delay set
 764      * by the access but also the delay arbitraly set by
 765      * the remote server.
 766      * Actually the remote server's muxer may set up a
 767      * pts<->dts delay in the muxed stream. That is
 768      * why we may end up in having a negative pts_delay,
 769      * to compensate that artificial delay. */
 770     mtime_t buffer_size = youngest_pict->date - oldest_pict->date;
 771     int64_t pts_slide = 0;
 772     if( buffer_size < 10000 )
 773     {
 774         if( p_priv->pts_adjust.i_num_faulty > 10 )
 775         {
 776             pts_slide = __MAX(p_input->i_pts_delay *3 / 2, 10000);
 777             p_priv->pts_adjust.i_num_faulty = 0;
 778         }
 779         if( p_priv->pts_adjust.to_high )
 780         {
 781             p_priv->pts_adjust.to_high = !p_priv->pts_adjust.to_high;
 782             p_priv->pts_adjust.i_num_faulty = 0;
 783         }
 784         p_priv->pts_adjust.i_num_faulty++;
 785     }
 786     else if( buffer_size > 100000 )
 787     {
 788         if( p_priv->pts_adjust.i_num_faulty > 25 )
 789         {
 790             pts_slide = -buffer_size/2;
 791             p_priv->pts_adjust.i_num_faulty = 0;
 792         }
 793         if( p_priv->pts_adjust.to_high )
 794         {
 795             p_priv->pts_adjust.to_high = !p_priv->pts_adjust.to_high;
 796             p_priv->pts_adjust.i_num_faulty = 0;
 797         }
 798         p_priv->pts_adjust.i_num_faulty++;
 799     }
 800     if( pts_slide )
 801     {
 802         mtime_t origi_delay = p_input->i_pts_delay;
 803
 804         p_input->i_pts_delay += pts_slide;
 805
 806         /* Don't play with the pts delay for more than -2<->3sec */
 807         if( p_input->i_pts_delay < -2000000 )
 808             p_input->i_pts_delay = -2000000;
 809         else if( p_input->i_pts_delay > 3000000 )
 810             p_input->i_pts_delay = 3000000;
 811         pts_slide = p_input->i_pts_delay - origi_delay;
 812
 813         msg_Dbg( p_input, "Sliding the pts by %dms pts delay at %dms picture buffer was %dms",
 814             (int)pts_slide/1000, (int)p_input->i_pts_delay/1000, (int)buffer_size/1000);
 815
 816         vlc_mutex_lock( &p_vout->picture_lock );
 817         /* Slide all the picture */
 818         for( i = 0; i < I_RENDERPICTURES; i++ )
 819             PP_RENDERPICTURE[i]->date += pts_slide;
 820         /* FIXME: slide aout/spu */
 821         vlc_mutex_unlock( &p_vout->picture_lock );
 822
 823     }
 824 }
 825
 826 static void DecoderDecodeVideo( decoder_t *p_dec, block_t *p_block )
 827 {
 828     input_thread_t *p_input = p_dec->p_owner->p_input;
 829     picture_t *p_pic;
 830
 831     while( (p_pic = p_dec->pf_decode_video( p_dec, &p_block )) )
 832     {
 833         vlc_mutex_lock( &p_input->p->counters.counters_lock );
 834         stats_UpdateInteger( p_dec, p_input->p->counters.p_decoded_video, 1, NULL );
 835         vlc_mutex_unlock( &p_input->p->counters.counters_lock );
 836
 837         if( p_pic->date < p_dec->p_owner->i_preroll_end )
 838         {
 839             VoutDisplayedPicture( p_dec->p_owner->p_vout, p_pic );
 840             continue;
 841         }
 842
 843         if( p_dec->p_owner->i_preroll_end > 0 )
 844         {
 845             msg_Dbg( p_dec, "End of video preroll" );
 846             if( p_dec->p_owner->p_vout )
 847                 VoutFlushPicture( p_dec->p_owner->p_vout );
 848             /* */
 849             p_dec->p_owner->i_preroll_end = -1;
 850         }
 851
 852         if( ( !p_dec->p_owner->p_packetizer || !p_dec->p_owner->p_packetizer->pf_get_cc ) && p_dec->pf_get_cc )
 853             DecoderGetCc( p_dec, p_dec );
 854
 855         vout_DatePicture( p_dec->p_owner->p_vout, p_pic,
 856                           p_pic->date );
 857
 858         optimize_video_pts( p_dec );
 859
 860         vout_DisplayPicture( p_dec->p_owner->p_vout, p_pic );
 861     }
 862 }
 863
 864 /**
 865  * Decode a block
 866  *
 867  * \param p_dec the decoder object
 868  * \param p_block the block to decode
 869  * \return VLC_SUCCESS or an error code
 870  */
 871 static int DecoderDecode( decoder_t *p_dec, block_t *p_block )
 872 {
 873     decoder_owner_sys_t *p_sys = (decoder_owner_sys_t *)p_dec->p_owner;
 874     const int i_rate = p_block ? p_block->i_rate : INPUT_RATE_DEFAULT;
 875
 876     if( p_block && p_block->i_buffer <= 0 )
 877     {
 878         block_Release( p_block );
 879         return VLC_SUCCESS;
 880     }
 881
 882 #ifdef ENABLE_SOUT
 883     if( p_dec->i_object_type == VLC_OBJECT_PACKETIZER )
 884     {
 885         block_t *p_sout_block;
 886
 887         while( ( p_sout_block =
 888                      p_dec->pf_packetize( p_dec, p_block ? &p_block : 0 ) ) )
 889         {
 890             if( !p_dec->p_owner->p_sout_input )
 891             {
 892                 es_format_Copy( &p_dec->p_owner->sout, &p_dec->fmt_out );
 893
 894                 p_dec->p_owner->sout.i_group = p_dec->fmt_in.i_group;
 895                 p_dec->p_owner->sout.i_id = p_dec->fmt_in.i_id;
 896                 if( p_dec->fmt_in.psz_language )
 897                 {
 898                     if( p_dec->p_owner->sout.psz_language )
 899                         free( p_dec->p_owner->sout.psz_language );
 900                     p_dec->p_owner->sout.psz_language =
 901                         strdup( p_dec->fmt_in.psz_language );
 902                 }
 903
 904                 p_dec->p_owner->p_sout_input =
 905                     sout_InputNew( p_dec->p_owner->p_sout,
 906                                    &p_dec->p_owner->sout );
 907
 908                 if( p_dec->p_owner->p_sout_input == NULL )
 909                 {
 910                     msg_Err( p_dec, "cannot create packetizer output (%4.4s)",
 911                              (char *)&p_dec->p_owner->sout.i_codec );
 912                     p_dec->b_error = true;
 913
 914                     while( p_sout_block )
 915                     {
 916                         block_t *p_next = p_sout_block->p_next;
 917                         block_Release( p_sout_block );
 918                         p_sout_block = p_next;
 919                     }
 920                     break;
 921                 }
 922             }
 923
 924             while( p_sout_block )
 925             {
 926                 block_t *p_next = p_sout_block->p_next;
 927
 928                 p_sout_block->p_next = NULL;
 929                 p_sout_block->i_rate = i_rate;
 930
 931                 sout_InputSendBuffer( p_dec->p_owner->p_sout_input,
 932                                       p_sout_block );
 933
 934                 p_sout_block = p_next;
 935             }
 936
 937             /* For now it's enough, as only sout impact on this flag */
 938             if( p_dec->p_owner->p_sout->i_out_pace_nocontrol > 0 &&
 939                 p_dec->p_owner->p_input->p->b_out_pace_control )
 940             {
 941                 msg_Dbg( p_dec, "switching to sync mode" );
 942                 p_dec->p_owner->p_input->p->b_out_pace_control = false;
 943             }
 944             else if( p_dec->p_owner->p_sout->i_out_pace_nocontrol <= 0 &&
 945                      !p_dec->p_owner->p_input->p->b_out_pace_control )
 946             {
 947                 msg_Dbg( p_dec, "switching to async mode" );
 948                 p_dec->p_owner->p_input->p->b_out_pace_control = true;
 949             }
 950         }
 951     }
 952     else
 953 #endif
 954     if( p_dec->fmt_in.i_cat == AUDIO_ES )
 955     {
 956         if( p_block )
 957             DecoderUpdatePreroll( &p_dec->p_owner->i_preroll_end, p_block );
 958
 959         if( p_dec->p_owner->p_packetizer )
 960         {
 961             block_t *p_packetized_block;
 962             decoder_t *p_packetizer = p_dec->p_owner->p_packetizer;
 963
 964             while( (p_packetized_block =
 965                     p_packetizer->pf_packetize( p_packetizer, p_block ? &p_block : NULL )) )
 966             {
 967                 if( p_packetizer->fmt_out.i_extra && !p_dec->fmt_in.i_extra )
 968                 {
 969                     es_format_Clean( &p_dec->fmt_in );
 970                     es_format_Copy( &p_dec->fmt_in, &p_packetizer->fmt_out );
 971                 }
 972
 973                 while( p_packetized_block )
 974                 {
 975                     block_t *p_next = p_packetized_block->p_next;
 976                     p_packetized_block->p_next = NULL;
 977                     p_packetized_block->i_rate = i_rate;
 978
 979                     DecoderDecodeAudio( p_dec, p_packetized_block );
 980
 981                     p_packetized_block = p_next;
 982                 }
 983             }
 984         }
 985         else if( p_block )
 986         {
 987             DecoderDecodeAudio( p_dec, p_block );
 988         }
 989     }
 990     else if( p_dec->fmt_in.i_cat == VIDEO_ES )
 991     {
 992         if( p_block )
 993             DecoderUpdatePreroll( &p_dec->p_owner->i_preroll_end, p_block );
 994
 995         if( p_dec->p_owner->p_packetizer )
 996         {
 997             block_t *p_packetized_block;
 998             decoder_t *p_packetizer = p_dec->p_owner->p_packetizer;
 999
1000             while( (p_packetized_block =
1001                     p_packetizer->pf_packetize( p_packetizer, p_block ? &p_block : NULL )) )
1002             {
1003                 if( p_packetizer->fmt_out.i_extra && !p_dec->fmt_in.i_extra )
1004                 {
1005                     es_format_Clean( &p_dec->fmt_in );
1006                     es_format_Copy( &p_dec->fmt_in, &p_packetizer->fmt_out );
1007                 }
1008                 if( p_packetizer->pf_get_cc )
1009                     DecoderGetCc( p_dec, p_packetizer );
1010
1011                 while( p_packetized_block )
1012                 {
1013                     block_t *p_next = p_packetized_block->p_next;
1014                     p_packetized_block->p_next = NULL;
1015                     p_packetized_block->i_rate = i_rate;
1016
1017                     DecoderDecodeVideo( p_dec, p_packetized_block );
1018
1019                     p_packetized_block = p_next;
1020                 }
1021             }
1022         }
1023         else if( p_block )
1024         {
1025             DecoderDecodeVideo( p_dec, p_block );
1026         }
1027     }
1028     else if( p_dec->fmt_in.i_cat == SPU_ES )
1029     {
1030         input_thread_t *p_input = p_dec->p_owner->p_input;
1031         vout_thread_t *p_vout;
1032         subpicture_t *p_spu;
1033
1034         if( p_block )
1035             DecoderUpdatePreroll( &p_dec->p_owner->i_preroll_end, p_block );
1036
1037         while( (p_spu = p_dec->pf_decode_sub( p_dec, p_block ? &p_block : NULL ) ) )
1038         {
1039             vlc_mutex_lock( &p_input->p->counters.counters_lock );
1040             stats_UpdateInteger( p_dec, p_input->p->counters.p_decoded_sub, 1, NULL );
1041             vlc_mutex_unlock( &p_input->p->counters.counters_lock );
1042
1043             p_vout = vlc_object_find( p_dec, VLC_OBJECT_VOUT, FIND_ANYWHERE );
1044             if( p_vout && p_sys->p_spu_vout == p_vout )
1045             {
1046                 /* Prerool does not work very well with subtitle */
1047                 if( p_spu->i_start < p_dec->p_owner->i_preroll_end &&
1048                     ( p_spu->i_stop <= 0 || p_spu->i_stop < p_dec->p_owner->i_preroll_end ) )
1049                     spu_DestroySubpicture( p_vout->p_spu, p_spu );
1050                 else
1051                     spu_DisplaySubpicture( p_vout->p_spu, p_spu );
1052             }
1053             else
1054             {
1055                 msg_Warn( p_dec, "no vout found, leaking subpicture" );
1056             }
1057             if( p_vout )
1058                 vlc_object_release( p_vout );
1059         }
1060     }
1061     else
1062     {
1063         msg_Err( p_dec, "unknown ES format" );
1064         p_dec->b_error = 1;
1065     }
1066
1067     return p_dec->b_error ? VLC_EGENERIC : VLC_SUCCESS;
1068 }
1069
1070 /**
1071  * Destroys a decoder object
1072  *
1073  * \param p_dec the decoder object
1074  * \return nothing
1075  */
1076 static void DeleteDecoder( decoder_t * p_dec )
1077 {
1078     msg_Dbg( p_dec, "killing decoder fourcc `%4.4s', %u PES in FIFO",
1079              (char*)&p_dec->fmt_in.i_codec,
1080              (unsigned)block_FifoCount( p_dec->p_owner->p_fifo ) );
1081
1082     /* Free all packets still in the decoder fifo. */
1083     block_FifoEmpty( p_dec->p_owner->p_fifo );
1084     block_FifoRelease( p_dec->p_owner->p_fifo );
1085
1086     /* Cleanup */
1087     if( p_dec->p_owner->p_aout_input )
1088         aout_DecDelete( p_dec->p_owner->p_aout, p_dec->p_owner->p_aout_input );
1089     if( p_dec->p_owner->p_aout )
1090     {
1091         vlc_object_release( p_dec->p_owner->p_aout );
1092         p_dec->p_owner->p_aout = NULL;
1093     }
1094     if( p_dec->p_owner->p_vout )
1095     {
1096         int i_pic;
1097
1098 #define p_pic p_dec->p_owner->p_vout->render.pp_picture[i_pic]
1099         /* Hack to make sure all the the pictures are freed by the decoder */
1100         for( i_pic = 0; i_pic < p_dec->p_owner->p_vout->render.i_pictures;
1101              i_pic++ )
1102         {
1103             if( p_pic->i_status == RESERVED_PICTURE )
1104                 vout_DestroyPicture( p_dec->p_owner->p_vout, p_pic );
1105             if( p_pic->i_refcount > 0 )
1106                 vout_UnlinkPicture( p_dec->p_owner->p_vout, p_pic );
1107         }
1108 #undef p_pic
1109
1110         /* We are about to die. Reattach video output to p_vlc. */
1111         vout_Request( p_dec, p_dec->p_owner->p_vout, 0 );
1112     }
1113
1114 #ifdef ENABLE_SOUT
1115     if( p_dec->p_owner->p_sout_input )
1116     {
1117         sout_InputDelete( p_dec->p_owner->p_sout_input );
1118         es_format_Clean( &p_dec->p_owner->sout );
1119     }
1120 #endif
1121
1122     if( p_dec->fmt_in.i_cat == SPU_ES )
1123     {
1124         vout_thread_t *p_vout;
1125
1126         p_vout = vlc_object_find( p_dec, VLC_OBJECT_VOUT, FIND_ANYWHERE );
1127         if( p_vout )
1128         {
1129             spu_Control( p_vout->p_spu, SPU_CHANNEL_CLEAR,
1130                          p_dec->p_owner->i_spu_channel );
1131             vlc_object_release( p_vout );
1132         }
1133     }
1134
1135     es_format_Clean( &p_dec->fmt_in );
1136     es_format_Clean( &p_dec->fmt_out );
1137
1138     if( p_dec->p_owner->p_packetizer )
1139     {
1140         module_Unneed( p_dec->p_owner->p_packetizer,
1141                        p_dec->p_owner->p_packetizer->p_module );
1142         es_format_Clean( &p_dec->p_owner->p_packetizer->fmt_in );
1143         es_format_Clean( &p_dec->p_owner->p_packetizer->fmt_out );
1144         vlc_object_detach( p_dec->p_owner->p_packetizer );
1145         vlc_object_release( p_dec->p_owner->p_packetizer );
1146     }
1147
1148     vlc_mutex_destroy( &p_dec->p_owner->lock_cc );
1149
1150     vlc_object_detach( p_dec );
1151
1152     free( p_dec->p_owner );
1153 }
1154
1155 /*****************************************************************************
1156  * Buffers allocation callbacks for the decoders
1157  *****************************************************************************/
1158 static aout_buffer_t *aout_new_buffer( decoder_t *p_dec, int i_samples )
1159 {
1160     decoder_owner_sys_t *p_sys = (decoder_owner_sys_t *)p_dec->p_owner;
1161     aout_buffer_t *p_buffer;
1162
1163     if( p_sys->p_aout_input != NULL &&
1164         ( p_dec->fmt_out.audio.i_rate != p_sys->audio.i_rate ||
1165           p_dec->fmt_out.audio.i_original_channels !=
1166               p_sys->audio.i_original_channels ||
1167           p_dec->fmt_out.audio.i_bytes_per_frame !=
1168               p_sys->audio.i_bytes_per_frame ) )
1169     {
1170         /* Parameters changed, restart the aout */
1171         aout_DecDelete( p_sys->p_aout, p_sys->p_aout_input );
1172         p_sys->p_aout_input = NULL;
1173     }
1174
1175     if( p_sys->p_aout_input == NULL )
1176     {
1177         audio_sample_format_t format;
1178         int i_force_dolby = config_GetInt( p_dec, "force-dolby-surround" );
1179
1180         p_dec->fmt_out.audio.i_format = p_dec->fmt_out.i_codec;
1181         p_sys->audio = p_dec->fmt_out.audio;
1182
1183         memcpy( &format, &p_sys->audio, sizeof( audio_sample_format_t ) );
1184         if ( i_force_dolby && (format.i_original_channels&AOUT_CHAN_PHYSMASK)
1185                                     == (AOUT_CHAN_LEFT|AOUT_CHAN_RIGHT) )
1186         {
1187             if ( i_force_dolby == 1 )
1188             {
1189                 format.i_original_channels = format.i_original_channels |
1190                                              AOUT_CHAN_DOLBYSTEREO;
1191             }
1192             else /* i_force_dolby == 2 */
1193             {
1194                 format.i_original_channels = format.i_original_channels &
1195                                              ~AOUT_CHAN_DOLBYSTEREO;
1196             }
1197         }
1198
1199         p_sys->p_aout_input =
1200             aout_DecNew( p_dec, &p_sys->p_aout, &format, &p_dec->fmt_out.audio_replay_gain );
1201         if( p_sys->p_aout_input == NULL )
1202         {
1203             msg_Err( p_dec, "failed to create audio output" );
1204             p_dec->b_error = true;
1205             return NULL;
1206         }
1207         p_dec->fmt_out.audio.i_bytes_per_frame =
1208             p_sys->audio.i_bytes_per_frame;
1209     }
1210
1211     p_buffer = aout_DecNewBuffer( p_sys->p_aout_input, i_samples );
1212
1213     return p_buffer;
1214 }
1215
1216 static void aout_del_buffer( decoder_t *p_dec, aout_buffer_t *p_buffer )
1217 {
1218     aout_DecDeleteBuffer( p_dec->p_owner->p_aout,
1219                           p_dec->p_owner->p_aout_input, p_buffer );
1220 }
1221
1222 static picture_t *vout_new_buffer( decoder_t *p_dec )
1223 {
1224     decoder_owner_sys_t *p_sys = (decoder_owner_sys_t *)p_dec->p_owner;
1225     picture_t *p_pic;
1226
1227     if( p_sys->p_vout == NULL ||
1228         p_dec->fmt_out.video.i_width != p_sys->video.i_width ||
1229         p_dec->fmt_out.video.i_height != p_sys->video.i_height ||
1230         p_dec->fmt_out.video.i_chroma != p_sys->video.i_chroma ||
1231         p_dec->fmt_out.video.i_aspect != p_sys->video.i_aspect )
1232     {
1233         if( !p_dec->fmt_out.video.i_width ||
1234             !p_dec->fmt_out.video.i_height )
1235         {
1236             /* Can't create a new vout without display size */
1237             return NULL;
1238         }
1239
1240         if( !p_dec->fmt_out.video.i_visible_width ||
1241             !p_dec->fmt_out.video.i_visible_height )
1242         {
1243             if( p_dec->fmt_in.video.i_visible_width &&
1244                 p_dec->fmt_in.video.i_visible_height )
1245             {
1246                 p_dec->fmt_out.video.i_visible_width =
1247                     p_dec->fmt_in.video.i_visible_width;
1248                 p_dec->fmt_out.video.i_visible_height =
1249                     p_dec->fmt_in.video.i_visible_height;
1250             }
1251             else
1252             {
1253                 p_dec->fmt_out.video.i_visible_width =
1254                     p_dec->fmt_out.video.i_width;
1255                 p_dec->fmt_out.video.i_visible_height =
1256                     p_dec->fmt_out.video.i_height;
1257             }
1258         }
1259
1260         if( p_dec->fmt_out.video.i_visible_height == 1088 &&
1261             var_CreateGetBool( p_dec, "hdtv-fix" ) )
1262         {
1263             p_dec->fmt_out.video.i_visible_height = 1080;
1264             p_dec->fmt_out.video.i_sar_num *= 135;
1265             p_dec->fmt_out.video.i_sar_den *= 136;
1266             msg_Warn( p_dec, "Fixing broken HDTV stream (display_height=1088)");
1267         }
1268
1269         if( !p_dec->fmt_out.video.i_sar_num ||
1270             !p_dec->fmt_out.video.i_sar_den )
1271         {
1272             p_dec->fmt_out.video.i_sar_num = p_dec->fmt_out.video.i_aspect *
1273               p_dec->fmt_out.video.i_visible_height;
1274
1275             p_dec->fmt_out.video.i_sar_den = VOUT_ASPECT_FACTOR *
1276               p_dec->fmt_out.video.i_visible_width;
1277         }
1278
1279         vlc_ureduce( &p_dec->fmt_out.video.i_sar_num,
1280                      &p_dec->fmt_out.video.i_sar_den,
1281                      p_dec->fmt_out.video.i_sar_num,
1282                      p_dec->fmt_out.video.i_sar_den, 50000 );
1283
1284         p_dec->fmt_out.video.i_chroma = p_dec->fmt_out.i_codec;
1285         p_sys->video = p_dec->fmt_out.video;
1286
1287         p_sys->p_vout = vout_Request( p_dec, p_sys->p_vout,
1288                                       &p_dec->fmt_out.video );
1289         if( p_sys->p_vout == NULL )
1290         {
1291             msg_Err( p_dec, "failed to create video output" );
1292             p_dec->b_error = true;
1293             return NULL;
1294         }
1295
1296         if( p_sys->video.i_rmask )
1297             p_sys->p_vout->render.i_rmask = p_sys->video.i_rmask;
1298         if( p_sys->video.i_gmask )
1299             p_sys->p_vout->render.i_gmask = p_sys->video.i_gmask;
1300         if( p_sys->video.i_bmask )
1301             p_sys->p_vout->render.i_bmask = p_sys->video.i_bmask;
1302     }
1303
1304     /* Get a new picture */
1305     while( !(p_pic = vout_CreatePicture( p_sys->p_vout, 0, 0, 0 ) ) )
1306     {
1307         int i_pic, i_ready_pic = 0;
1308
1309         if( p_dec->b_die || p_dec->b_error )
1310         {
1311             return NULL;
1312         }
1313
1314 #define p_pic p_dec->p_owner->p_vout->render.pp_picture[i_pic]
1315         /* Check the decoder doesn't leak pictures */
1316         for( i_pic = 0; i_pic < p_dec->p_owner->p_vout->render.i_pictures;
1317              i_pic++ )
1318         {
1319             if( p_pic->i_status == READY_PICTURE )
1320             {
1321                 if( i_ready_pic++ > 0 ) break;
1322                 else continue;
1323             }
1324
1325             if( p_pic->i_status != DISPLAYED_PICTURE &&
1326                 p_pic->i_status != RESERVED_PICTURE &&
1327                 p_pic->i_status != READY_PICTURE ) break;
1328
1329             if( !p_pic->i_refcount && p_pic->i_status != RESERVED_PICTURE )
1330                 break;
1331         }
1332         if( i_pic == p_dec->p_owner->p_vout->render.i_pictures )
1333         {
1334             msg_Err( p_dec, "decoder is leaking pictures, resetting the heap" );
1335
1336             /* Just free all the pictures */
1337             for( i_pic = 0; i_pic < p_dec->p_owner->p_vout->render.i_pictures;
1338                  i_pic++ )
1339             {
1340                 if( p_pic->i_status == RESERVED_PICTURE )
1341                     vout_DestroyPicture( p_dec->p_owner->p_vout, p_pic );
1342                 if( p_pic->i_refcount > 0 )
1343                 vout_UnlinkPicture( p_dec->p_owner->p_vout, p_pic );
1344             }
1345         }
1346 #undef p_pic
1347
1348         msleep( VOUT_OUTMEM_SLEEP );
1349     }
1350
1351     return p_pic;
1352 }
1353
1354 static void vout_del_buffer( decoder_t *p_dec, picture_t *p_pic )
1355 {
1356     VoutDisplayedPicture( p_dec->p_owner->p_vout, p_pic );
1357 }
1358
1359 static void vout_link_picture( decoder_t *p_dec, picture_t *p_pic )
1360 {
1361     vout_LinkPicture( p_dec->p_owner->p_vout, p_pic );
1362 }
1363
1364 static void vout_unlink_picture( decoder_t *p_dec, picture_t *p_pic )
1365 {
1366     vout_UnlinkPicture( p_dec->p_owner->p_vout, p_pic );
1367 }
1368
1369 static subpicture_t *spu_new_buffer( decoder_t *p_dec )
1370 {
1371     decoder_owner_sys_t *p_sys = (decoder_owner_sys_t *)p_dec->p_owner;
1372     vout_thread_t *p_vout = NULL;
1373     subpicture_t *p_subpic;
1374     int i_attempts = 30;
1375
1376     while( i_attempts-- )
1377     {
1378         if( p_dec->b_die || p_dec->b_error ) break;
1379
1380         p_vout = vlc_object_find( p_dec, VLC_OBJECT_VOUT, FIND_ANYWHERE );
1381         if( p_vout ) break;
1382
1383         msleep( VOUT_DISPLAY_DELAY );
1384     }
1385
1386     if( !p_vout )
1387     {
1388         msg_Warn( p_dec, "no vout found, dropping subpicture" );
1389         return NULL;
1390     }
1391
1392     if( p_sys->p_spu_vout != p_vout )
1393     {
1394         spu_Control( p_vout->p_spu, SPU_CHANNEL_REGISTER,
1395                      &p_sys->i_spu_channel );
1396         p_sys->p_spu_vout = p_vout;
1397     }
1398
1399     p_subpic = spu_CreateSubpicture( p_vout->p_spu );
1400     if( p_subpic )
1401     {
1402         p_subpic->i_channel = p_sys->i_spu_channel;
1403     }
1404
1405     vlc_object_release( p_vout );
1406
1407     return p_subpic;
1408 }
1409
1410 static void spu_del_buffer( decoder_t *p_dec, subpicture_t *p_subpic )
1411 {
1412     decoder_owner_sys_t *p_sys = (decoder_owner_sys_t *)p_dec->p_owner;
1413     vout_thread_t *p_vout = NULL;
1414
1415     p_vout = vlc_object_find( p_dec, VLC_OBJECT_VOUT, FIND_ANYWHERE );
1416     if( !p_vout || p_sys->p_spu_vout != p_vout )
1417     {
1418         if( p_vout )
1419             vlc_object_release( p_vout );
1420         msg_Warn( p_dec, "no vout found, leaking subpicture" );
1421         return;
1422     }
1423
1424     spu_DestroySubpicture( p_vout->p_spu, p_subpic );
1425
1426     vlc_object_release( p_vout );
1427 }
1428