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         return NULL;
 449
 450     p_dec->pf_decode_audio = 0;
 451     p_dec->pf_decode_video = 0;
 452     p_dec->pf_decode_sub = 0;
 453     p_dec->pf_get_cc = 0;
 454     p_dec->pf_packetize = 0;
 455
 456     /* Initialize the decoder fifo */
 457     p_dec->p_module = NULL;
 458
 459     memset( &null_es_format, 0, sizeof(es_format_t) );
 460     es_format_Copy( &p_dec->fmt_in, fmt );
 461     es_format_Copy( &p_dec->fmt_out, &null_es_format );
 462
 463     /* Allocate our private structure for the decoder */
 464     p_dec->p_owner = p_owner = malloc( sizeof( decoder_owner_sys_t ) );
 465     if( p_dec->p_owner == NULL )
 466         return NULL;
 467     p_dec->p_owner->b_own_thread = true;
 468     p_dec->p_owner->i_preroll_end = -1;
 469     p_dec->p_owner->p_input = p_input;
 470     p_dec->p_owner->p_aout = NULL;
 471     p_dec->p_owner->p_aout_input = NULL;
 472     p_dec->p_owner->p_vout = NULL;
 473     p_dec->p_owner->p_spu_vout = NULL;
 474     p_dec->p_owner->i_spu_channel = 0;
 475     p_dec->p_owner->p_sout = p_input->p->p_sout;
 476     p_dec->p_owner->p_sout_input = NULL;
 477     p_dec->p_owner->p_packetizer = NULL;
 478
 479     /* decoder fifo */
 480     if( ( p_dec->p_owner->p_fifo = block_FifoNew() ) == NULL )
 481         return NULL;
 482
 483     /* Set buffers allocation callbacks for the decoders */
 484     p_dec->pf_aout_buffer_new = aout_new_buffer;
 485     p_dec->pf_aout_buffer_del = aout_del_buffer;
 486     p_dec->pf_vout_buffer_new = vout_new_buffer;
 487     p_dec->pf_vout_buffer_del = vout_del_buffer;
 488     p_dec->pf_picture_link    = vout_link_picture;
 489     p_dec->pf_picture_unlink  = vout_unlink_picture;
 490     p_dec->pf_spu_buffer_new  = spu_new_buffer;
 491     p_dec->pf_spu_buffer_del  = spu_del_buffer;
 492
 493     vlc_object_attach( p_dec, p_input );
 494
 495     /* Find a suitable decoder/packetizer module */
 496     if( i_object_type == VLC_OBJECT_DECODER )
 497         p_dec->p_module = module_Need( p_dec, "decoder", "$codec", 0 );
 498     else
 499         p_dec->p_module = module_Need( p_dec, "packetizer", "$packetizer", 0 );
 500
 501     /* Check if decoder requires already packetized data */
 502     if( i_object_type == VLC_OBJECT_DECODER &&
 503         p_dec->b_need_packetized && !p_dec->fmt_in.b_packetized )
 504     {
 505         p_dec->p_owner->p_packetizer =
 506             vlc_object_create( p_input, VLC_OBJECT_PACKETIZER );
 507         if( p_dec->p_owner->p_packetizer )
 508         {
 509             es_format_Copy( &p_dec->p_owner->p_packetizer->fmt_in,
 510                             &p_dec->fmt_in );
 511
 512             es_format_Copy( &p_dec->p_owner->p_packetizer->fmt_out,
 513                             &null_es_format );
 514
 515             vlc_object_attach( p_dec->p_owner->p_packetizer, p_input );
 516
 517             p_dec->p_owner->p_packetizer->p_module =
 518                 module_Need( p_dec->p_owner->p_packetizer,
 519                              "packetizer", "$packetizer", 0 );
 520
 521             if( !p_dec->p_owner->p_packetizer->p_module )
 522             {
 523                 es_format_Clean( &p_dec->p_owner->p_packetizer->fmt_in );
 524                 vlc_object_detach( p_dec->p_owner->p_packetizer );
 525                 vlc_object_release( p_dec->p_owner->p_packetizer );
 526             }
 527         }
 528     }
 529
 530     /* Copy ourself the input replay gain */
 531     if( fmt->i_cat == AUDIO_ES )
 532     {
 533         for( i = 0; i < AUDIO_REPLAY_GAIN_MAX; i++ )
 534         {
 535             if( !p_dec->fmt_out.audio_replay_gain.pb_peak[i] )
 536             {
 537                 p_dec->fmt_out.audio_replay_gain.pb_peak[i] = fmt->audio_replay_gain.pb_peak[i];
 538                 p_dec->fmt_out.audio_replay_gain.pf_peak[i] = fmt->audio_replay_gain.pf_peak[i];
 539             }
 540             if( !p_dec->fmt_out.audio_replay_gain.pb_gain[i] )
 541             {
 542                 p_dec->fmt_out.audio_replay_gain.pb_gain[i] = fmt->audio_replay_gain.pb_gain[i];
 543                 p_dec->fmt_out.audio_replay_gain.pf_gain[i] = fmt->audio_replay_gain.pf_gain[i];
 544             }
 545         }
 546     }
 547     /* */
 548     p_owner->b_cc_supported = false;
 549     if( i_object_type == VLC_OBJECT_DECODER )
 550     {
 551         if( p_owner->p_packetizer && p_owner->p_packetizer->pf_get_cc )
 552             p_owner->b_cc_supported = true;
 553         if( p_dec->pf_get_cc )
 554             p_owner->b_cc_supported = true;
 555     }
 556
 557     vlc_mutex_init( &p_owner->lock_cc );
 558     for( i = 0; i < 4; i++ )
 559     {
 560         p_owner->pb_cc_present[i] = false;
 561         p_owner->pp_cc[i] = NULL;
 562     }
 563     return p_dec;
 564 }
 565
 566 /**
 567  * The decoding main loop
 568  *
 569  * \param p_dec the decoder
 570  * \return 0
 571  */
 572 static int DecoderThread( decoder_t * p_dec )
 573 {
 574     block_t *p_block;
 575
 576     /* The decoder's main loop */
 577     while( !p_dec->b_die && !p_dec->b_error )
 578     {
 579         if( ( p_block = block_FifoGet( p_dec->p_owner->p_fifo ) ) == NULL )
 580         {
 581             p_dec->b_error = 1;
 582             break;
 583         }
 584         if( DecoderDecode( p_dec, p_block ) != VLC_SUCCESS )
 585         {
 586             break;
 587         }
 588     }
 589
 590     while( !p_dec->b_die )
 591     {
 592         /* Trash all received PES packets */
 593         p_block = block_FifoGet( p_dec->p_owner->p_fifo );
 594         if( p_block ) block_Release( p_block );
 595     }
 596
 597     /* We do it here because of the dll loader that wants close() in the
 598      * same thread than open()/decode() */
 599     module_Unneed( p_dec, p_dec->p_module );
 600
 601     return 0;
 602 }
 603
 604 static inline void DecoderUpdatePreroll( int64_t *pi_preroll, const block_t *p )
 605 {
 606     if( p->i_flags & (BLOCK_FLAG_PREROLL|BLOCK_FLAG_DISCONTINUITY) )
 607         *pi_preroll = INT64_MAX;
 608     else if( p->i_pts > 0 )
 609         *pi_preroll = __MIN( *pi_preroll, p->i_pts );
 610     else if( p->i_dts > 0 )
 611         *pi_preroll = __MIN( *pi_preroll, p->i_dts );
 612 }
 613 static void DecoderDecodeAudio( decoder_t *p_dec, block_t *p_block )
 614 {
 615     input_thread_t *p_input = p_dec->p_owner->p_input;
 616     const int i_rate = p_block->i_rate;
 617     aout_buffer_t *p_aout_buf;
 618
 619     while( (p_aout_buf = p_dec->pf_decode_audio( p_dec, &p_block )) )
 620     {
 621         vlc_mutex_lock( &p_input->p->counters.counters_lock );
 622         stats_UpdateInteger( p_dec, p_input->p->counters.p_decoded_audio, 1, NULL );
 623         vlc_mutex_unlock( &p_input->p->counters.counters_lock );
 624
 625         if( p_aout_buf->start_date < p_dec->p_owner->i_preroll_end )
 626         {
 627             aout_DecDeleteBuffer( p_dec->p_owner->p_aout,
 628                                   p_dec->p_owner->p_aout_input, p_aout_buf );
 629             continue;
 630         }
 631
 632         if( p_dec->p_owner->i_preroll_end > 0 )
 633         {
 634             /* FIXME TODO flush audio output (don't know how to do that) */
 635             msg_Dbg( p_dec, "End of audio preroll" );
 636             p_dec->p_owner->i_preroll_end = -1;
 637         }
 638         aout_DecPlay( p_dec->p_owner->p_aout,
 639                       p_dec->p_owner->p_aout_input,
 640                       p_aout_buf, i_rate );
 641     }
 642 }
 643 static void DecoderGetCc( decoder_t *p_dec, decoder_t *p_dec_cc )
 644 {
 645     block_t *p_cc;
 646     bool pb_present[4];
 647     int i;
 648     int i_cc_decoder;
 649
 650     assert( p_dec_cc->pf_get_cc != NULL );
 651
 652     /* Do not try retreiving CC if not wanted (sout) or cannot be retreived */
 653     if( !p_dec->p_owner->b_cc_supported )
 654         return;
 655
 656     p_cc = p_dec_cc->pf_get_cc( p_dec_cc, pb_present );
 657     if( !p_cc )
 658         return;
 659
 660     vlc_mutex_lock( &p_dec->p_owner->lock_cc );
 661     for( i = 0, i_cc_decoder = 0; i < 4; i++ )
 662     {
 663         p_dec->p_owner->pb_cc_present[i] |= pb_present[i];
 664         if( p_dec->p_owner->pp_cc[i] )
 665             i_cc_decoder++;
 666     }
 667
 668     for( i = 0; i < 4; i++ )
 669     {
 670         if( !p_dec->p_owner->pp_cc[i] )
 671             continue;
 672
 673         if( i_cc_decoder > 1 )
 674             DecoderDecode( p_dec->p_owner->pp_cc[i], block_Duplicate( p_cc ) );
 675         else
 676             DecoderDecode( p_dec->p_owner->pp_cc[i], p_cc );
 677         i_cc_decoder--;
 678     }
 679     vlc_mutex_unlock( &p_dec->p_owner->lock_cc );
 680 }
 681 static void VoutDisplayedPicture( vout_thread_t *p_vout, picture_t *p_pic )
 682 {
 683     vlc_mutex_lock( &p_vout->picture_lock );
 684
 685     if( p_pic->i_status == READY_PICTURE )
 686     {
 687         /* Grr cannot destroy ready picture by myself so be sure vout won't like it */
 688         p_pic->date = 1;
 689     }
 690     else if( p_pic->i_refcount > 0 )
 691     {
 692         p_pic->i_status = DISPLAYED_PICTURE;
 693     }
 694     else
 695     {
 696         p_pic->i_status = DESTROYED_PICTURE;
 697         p_vout->i_heap_size--;
 698     }
 699
 700     vlc_mutex_unlock( &p_vout->picture_lock );
 701 }
 702 static void VoutFlushPicture( vout_thread_t *p_vout )
 703 {
 704     int i;
 705     vlc_mutex_lock( &p_vout->picture_lock );
 706     for( i = 0; i < p_vout->render.i_pictures; i++ )
 707     {
 708         picture_t *p_pic = p_vout->render.pp_picture[i];
 709
 710         if( p_pic->i_status == READY_PICTURE ||
 711             p_pic->i_status == DISPLAYED_PICTURE )
 712         {
 713             /* We cannot change picture status if it is in READY_PICTURE state,
 714              * Just make sure they won't be displayed */
 715             p_pic->date = 1;
 716         }
 717     }
 718     vlc_mutex_unlock( &p_vout->picture_lock );
 719 }
 720
 721
 722 static void optimize_video_pts( decoder_t *p_dec )
 723 {
 724     picture_t * oldest_pict = NULL;
 725     picture_t * youngest_pict = NULL;
 726     int i;
 727
 728     input_thread_t * p_input = p_dec->p_owner->p_input;
 729     vout_thread_t * p_vout = p_dec->p_owner->p_vout;
 730     input_thread_private_t * p_priv = p_input->p;
 731
 732     /* Enable with --auto-adjust-pts-delay */
 733     if( !p_priv->pts_adjust.auto_adjust ) return;
 734
 735     for( i = 0; i < I_RENDERPICTURES; i++ )
 736     {
 737         picture_t * pic = PP_RENDERPICTURE[i];
 738         if( pic->i_status != READY_PICTURE )
 739             continue;
 740
 741         if( !oldest_pict || pic->date < oldest_pict->date )
 742             oldest_pict = pic;
 743         if( !youngest_pict || pic->date > youngest_pict->date )
 744             youngest_pict = pic;
 745     }
 746
 747     if( !youngest_pict || !oldest_pict )
 748         return;
 749
 750     /* Try to find if we can reduce the pts
 751      * This first draft is way to simple, and we can't say if the
 752      * algo will converge. It's also full of constants.
 753      * But this simple algo allows to reduce the latency
 754      * to the minimum.
 755      * The whole point of this, is to bypass the pts_delay set
 756      * by the access but also the delay arbitraly set by
 757      * the remote server.
 758      * Actually the remote server's muxer may set up a
 759      * pts<->dts delay in the muxed stream. That is
 760      * why we may end up in having a negative pts_delay,
 761      * to compensate that artificial delay. */
 762     mtime_t buffer_size = youngest_pict->date - oldest_pict->date;
 763     int64_t pts_slide = 0;
 764     if( buffer_size < 10000 )
 765     {
 766         if( p_priv->pts_adjust.i_num_faulty > 10 )
 767         {
 768             pts_slide = __MAX(p_input->i_pts_delay *3 / 2, 10000);
 769             p_priv->pts_adjust.i_num_faulty = 0;
 770         }
 771         if( p_priv->pts_adjust.to_high )
 772         {
 773             p_priv->pts_adjust.to_high = !p_priv->pts_adjust.to_high;
 774             p_priv->pts_adjust.i_num_faulty = 0;
 775         }
 776         p_priv->pts_adjust.i_num_faulty++;
 777     }
 778     else if( buffer_size > 100000 )
 779     {
 780         if( p_priv->pts_adjust.i_num_faulty > 25 )
 781         {
 782             pts_slide = -buffer_size/2;
 783             p_priv->pts_adjust.i_num_faulty = 0;
 784         }
 785         if( p_priv->pts_adjust.to_high )
 786         {
 787             p_priv->pts_adjust.to_high = !p_priv->pts_adjust.to_high;
 788             p_priv->pts_adjust.i_num_faulty = 0;
 789         }
 790         p_priv->pts_adjust.i_num_faulty++;
 791     }
 792     if( pts_slide )
 793     {
 794         mtime_t origi_delay = p_input->i_pts_delay;
 795
 796         p_input->i_pts_delay += pts_slide;
 797
 798         /* Don't play with the pts delay for more than -2<->3sec */
 799         if( p_input->i_pts_delay < -2000000 )
 800             p_input->i_pts_delay = -2000000;
 801         else if( p_input->i_pts_delay > 3000000 )
 802             p_input->i_pts_delay = 3000000;
 803         pts_slide = p_input->i_pts_delay - origi_delay;
 804
 805         msg_Dbg( p_input, "Sliding the pts by %dms pts delay at %dms picture buffer was %dms",
 806             (int)pts_slide/1000, (int)p_input->i_pts_delay/1000, (int)buffer_size/1000);
 807
 808         vlc_mutex_lock( &p_vout->picture_lock );
 809         /* Slide all the picture */
 810         for( i = 0; i < I_RENDERPICTURES; i++ )
 811             PP_RENDERPICTURE[i]->date += pts_slide;
 812         /* FIXME: slide aout/spu */
 813         vlc_mutex_unlock( &p_vout->picture_lock );
 814
 815     }
 816 }
 817
 818 static void DecoderDecodeVideo( decoder_t *p_dec, block_t *p_block )
 819 {
 820     input_thread_t *p_input = p_dec->p_owner->p_input;
 821     picture_t *p_pic;
 822
 823     while( (p_pic = p_dec->pf_decode_video( p_dec, &p_block )) )
 824     {
 825         vlc_mutex_lock( &p_input->p->counters.counters_lock );
 826         stats_UpdateInteger( p_dec, p_input->p->counters.p_decoded_video, 1, NULL );
 827         vlc_mutex_unlock( &p_input->p->counters.counters_lock );
 828
 829         if( p_pic->date < p_dec->p_owner->i_preroll_end )
 830         {
 831             VoutDisplayedPicture( p_dec->p_owner->p_vout, p_pic );
 832             continue;
 833         }
 834
 835         if( p_dec->p_owner->i_preroll_end > 0 )
 836         {
 837             msg_Dbg( p_dec, "End of video preroll" );
 838             if( p_dec->p_owner->p_vout )
 839                 VoutFlushPicture( p_dec->p_owner->p_vout );
 840             /* */
 841             p_dec->p_owner->i_preroll_end = -1;
 842         }
 843
 844         if( ( !p_dec->p_owner->p_packetizer || !p_dec->p_owner->p_packetizer->pf_get_cc ) && p_dec->pf_get_cc )
 845             DecoderGetCc( p_dec, p_dec );
 846
 847         vout_DatePicture( p_dec->p_owner->p_vout, p_pic,
 848                           p_pic->date );
 849
 850         optimize_video_pts( p_dec );
 851
 852         vout_DisplayPicture( p_dec->p_owner->p_vout, p_pic );
 853     }
 854 }
 855
 856 /**
 857  * Decode a block
 858  *
 859  * \param p_dec the decoder object
 860  * \param p_block the block to decode
 861  * \return VLC_SUCCESS or an error code
 862  */
 863 static int DecoderDecode( decoder_t *p_dec, block_t *p_block )
 864 {
 865     decoder_owner_sys_t *p_sys = (decoder_owner_sys_t *)p_dec->p_owner;
 866     const int i_rate = p_block ? p_block->i_rate : INPUT_RATE_DEFAULT;
 867
 868     if( p_block && p_block->i_buffer <= 0 )
 869     {
 870         block_Release( p_block );
 871         return VLC_SUCCESS;
 872     }
 873
 874 #ifdef ENABLE_SOUT
 875     if( p_dec->i_object_type == VLC_OBJECT_PACKETIZER )
 876     {
 877         block_t *p_sout_block;
 878
 879         while( ( p_sout_block =
 880                      p_dec->pf_packetize( p_dec, p_block ? &p_block : 0 ) ) )
 881         {
 882             if( !p_dec->p_owner->p_sout_input )
 883             {
 884                 es_format_Copy( &p_dec->p_owner->sout, &p_dec->fmt_out );
 885
 886                 p_dec->p_owner->sout.i_group = p_dec->fmt_in.i_group;
 887                 p_dec->p_owner->sout.i_id = p_dec->fmt_in.i_id;
 888                 if( p_dec->fmt_in.psz_language )
 889                 {
 890                     if( p_dec->p_owner->sout.psz_language )
 891                         free( p_dec->p_owner->sout.psz_language );
 892                     p_dec->p_owner->sout.psz_language =
 893                         strdup( p_dec->fmt_in.psz_language );
 894                 }
 895
 896                 p_dec->p_owner->p_sout_input =
 897                     sout_InputNew( p_dec->p_owner->p_sout,
 898                                    &p_dec->p_owner->sout );
 899
 900                 if( p_dec->p_owner->p_sout_input == NULL )
 901                 {
 902                     msg_Err( p_dec, "cannot create packetizer output (%4.4s)",
 903                              (char *)&p_dec->p_owner->sout.i_codec );
 904                     p_dec->b_error = true;
 905
 906                     while( p_sout_block )
 907                     {
 908                         block_t *p_next = p_sout_block->p_next;
 909                         block_Release( p_sout_block );
 910                         p_sout_block = p_next;
 911                     }
 912                     break;
 913                 }
 914             }
 915
 916             while( p_sout_block )
 917             {
 918                 block_t *p_next = p_sout_block->p_next;
 919
 920                 p_sout_block->p_next = NULL;
 921                 p_sout_block->i_rate = i_rate;
 922
 923                 sout_InputSendBuffer( p_dec->p_owner->p_sout_input,
 924                                       p_sout_block );
 925
 926                 p_sout_block = p_next;
 927             }
 928
 929             /* For now it's enough, as only sout impact on this flag */
 930             if( p_dec->p_owner->p_sout->i_out_pace_nocontrol > 0 &&
 931                 p_dec->p_owner->p_input->p->b_out_pace_control )
 932             {
 933                 msg_Dbg( p_dec, "switching to sync mode" );
 934                 p_dec->p_owner->p_input->p->b_out_pace_control = false;
 935             }
 936             else if( p_dec->p_owner->p_sout->i_out_pace_nocontrol <= 0 &&
 937                      !p_dec->p_owner->p_input->p->b_out_pace_control )
 938             {
 939                 msg_Dbg( p_dec, "switching to async mode" );
 940                 p_dec->p_owner->p_input->p->b_out_pace_control = true;
 941             }
 942         }
 943     }
 944     else
 945 #endif
 946     if( p_dec->fmt_in.i_cat == AUDIO_ES )
 947     {
 948         if( p_block )
 949             DecoderUpdatePreroll( &p_dec->p_owner->i_preroll_end, p_block );
 950
 951         if( p_dec->p_owner->p_packetizer )
 952         {
 953             block_t *p_packetized_block;
 954             decoder_t *p_packetizer = p_dec->p_owner->p_packetizer;
 955
 956             while( (p_packetized_block =
 957                     p_packetizer->pf_packetize( p_packetizer, p_block ? &p_block : NULL )) )
 958             {
 959                 if( p_packetizer->fmt_out.i_extra && !p_dec->fmt_in.i_extra )
 960                 {
 961                     es_format_Clean( &p_dec->fmt_in );
 962                     es_format_Copy( &p_dec->fmt_in, &p_packetizer->fmt_out );
 963                 }
 964
 965                 while( p_packetized_block )
 966                 {
 967                     block_t *p_next = p_packetized_block->p_next;
 968                     p_packetized_block->p_next = NULL;
 969                     p_packetized_block->i_rate = i_rate;
 970
 971                     DecoderDecodeAudio( p_dec, p_packetized_block );
 972
 973                     p_packetized_block = p_next;
 974                 }
 975             }
 976         }
 977         else if( p_block )
 978         {
 979             DecoderDecodeAudio( p_dec, p_block );
 980         }
 981     }
 982     else if( p_dec->fmt_in.i_cat == VIDEO_ES )
 983     {
 984         if( p_block )
 985             DecoderUpdatePreroll( &p_dec->p_owner->i_preroll_end, p_block );
 986
 987         if( p_dec->p_owner->p_packetizer )
 988         {
 989             block_t *p_packetized_block;
 990             decoder_t *p_packetizer = p_dec->p_owner->p_packetizer;
 991
 992             while( (p_packetized_block =
 993                     p_packetizer->pf_packetize( p_packetizer, p_block ? &p_block : NULL )) )
 994             {
 995                 if( p_packetizer->fmt_out.i_extra && !p_dec->fmt_in.i_extra )
 996                 {
 997                     es_format_Clean( &p_dec->fmt_in );
 998                     es_format_Copy( &p_dec->fmt_in, &p_packetizer->fmt_out );
 999                 }
1000                 if( p_packetizer->pf_get_cc )
1001                     DecoderGetCc( p_dec, p_packetizer );
1002
1003                 while( p_packetized_block )
1004                 {
1005                     block_t *p_next = p_packetized_block->p_next;
1006                     p_packetized_block->p_next = NULL;
1007                     p_packetized_block->i_rate = i_rate;
1008
1009                     DecoderDecodeVideo( p_dec, p_packetized_block );
1010
1011                     p_packetized_block = p_next;
1012                 }
1013             }
1014         }
1015         else if( p_block )
1016         {
1017             DecoderDecodeVideo( p_dec, p_block );
1018         }
1019     }
1020     else if( p_dec->fmt_in.i_cat == SPU_ES )
1021     {
1022         input_thread_t *p_input = p_dec->p_owner->p_input;
1023         vout_thread_t *p_vout;
1024         subpicture_t *p_spu;
1025
1026         if( p_block )
1027             DecoderUpdatePreroll( &p_dec->p_owner->i_preroll_end, p_block );
1028
1029         while( (p_spu = p_dec->pf_decode_sub( p_dec, p_block ? &p_block : NULL ) ) )
1030         {
1031             vlc_mutex_lock( &p_input->p->counters.counters_lock );
1032             stats_UpdateInteger( p_dec, p_input->p->counters.p_decoded_sub, 1, NULL );
1033             vlc_mutex_unlock( &p_input->p->counters.counters_lock );
1034
1035             p_vout = vlc_object_find( p_dec, VLC_OBJECT_VOUT, FIND_ANYWHERE );
1036             if( p_vout && p_sys->p_spu_vout == p_vout )
1037             {
1038                 /* Prerool does not work very well with subtitle */
1039                 if( p_spu->i_start < p_dec->p_owner->i_preroll_end &&
1040                     ( p_spu->i_stop <= 0 || p_spu->i_stop < p_dec->p_owner->i_preroll_end ) )
1041                     spu_DestroySubpicture( p_vout->p_spu, p_spu );
1042                 else
1043                     spu_DisplaySubpicture( p_vout->p_spu, p_spu );
1044             }
1045             else
1046             {
1047                 msg_Warn( p_dec, "no vout found, leaking subpicture" );
1048             }
1049             if( p_vout )
1050                 vlc_object_release( p_vout );
1051         }
1052     }
1053     else
1054     {
1055         msg_Err( p_dec, "unknown ES format" );
1056         p_dec->b_error = 1;
1057     }
1058
1059     return p_dec->b_error ? VLC_EGENERIC : VLC_SUCCESS;
1060 }
1061
1062 /**
1063  * Destroys a decoder object
1064  *
1065  * \param p_dec the decoder object
1066  * \return nothing
1067  */
1068 static void DeleteDecoder( decoder_t * p_dec )
1069 {
1070     msg_Dbg( p_dec, "killing decoder fourcc `%4.4s', %u PES in FIFO",
1071              (char*)&p_dec->fmt_in.i_codec,
1072              (unsigned)block_FifoCount( p_dec->p_owner->p_fifo ) );
1073
1074     /* Free all packets still in the decoder fifo. */
1075     block_FifoEmpty( p_dec->p_owner->p_fifo );
1076     block_FifoRelease( p_dec->p_owner->p_fifo );
1077
1078     /* Cleanup */
1079     if( p_dec->p_owner->p_aout_input )
1080         aout_DecDelete( p_dec->p_owner->p_aout, p_dec->p_owner->p_aout_input );
1081     if( p_dec->p_owner->p_aout )
1082     {
1083         vlc_object_release( p_dec->p_owner->p_aout );
1084         p_dec->p_owner->p_aout = NULL;
1085     }
1086     if( p_dec->p_owner->p_vout )
1087     {
1088         int i_pic;
1089
1090 #define p_pic p_dec->p_owner->p_vout->render.pp_picture[i_pic]
1091         /* Hack to make sure all the the pictures are freed by the decoder */
1092         for( i_pic = 0; i_pic < p_dec->p_owner->p_vout->render.i_pictures;
1093              i_pic++ )
1094         {
1095             if( p_pic->i_status == RESERVED_PICTURE )
1096                 vout_DestroyPicture( p_dec->p_owner->p_vout, p_pic );
1097             if( p_pic->i_refcount > 0 )
1098                 vout_UnlinkPicture( p_dec->p_owner->p_vout, p_pic );
1099         }
1100 #undef p_pic
1101
1102         /* We are about to die. Reattach video output to p_vlc. */
1103         vout_Request( p_dec, p_dec->p_owner->p_vout, 0 );
1104     }
1105
1106 #ifdef ENABLE_SOUT
1107     if( p_dec->p_owner->p_sout_input )
1108     {
1109         sout_InputDelete( p_dec->p_owner->p_sout_input );
1110         es_format_Clean( &p_dec->p_owner->sout );
1111     }
1112 #endif
1113
1114     if( p_dec->fmt_in.i_cat == SPU_ES )
1115     {
1116         vout_thread_t *p_vout;
1117
1118         p_vout = vlc_object_find( p_dec, VLC_OBJECT_VOUT, FIND_ANYWHERE );
1119         if( p_vout )
1120         {
1121             spu_Control( p_vout->p_spu, SPU_CHANNEL_CLEAR,
1122                          p_dec->p_owner->i_spu_channel );
1123             vlc_object_release( p_vout );
1124         }
1125     }
1126
1127     es_format_Clean( &p_dec->fmt_in );
1128     es_format_Clean( &p_dec->fmt_out );
1129
1130     if( p_dec->p_owner->p_packetizer )
1131     {
1132         module_Unneed( p_dec->p_owner->p_packetizer,
1133                        p_dec->p_owner->p_packetizer->p_module );
1134         es_format_Clean( &p_dec->p_owner->p_packetizer->fmt_in );
1135         es_format_Clean( &p_dec->p_owner->p_packetizer->fmt_out );
1136         vlc_object_detach( p_dec->p_owner->p_packetizer );
1137         vlc_object_release( p_dec->p_owner->p_packetizer );
1138     }
1139
1140     vlc_mutex_destroy( &p_dec->p_owner->lock_cc );
1141
1142     vlc_object_detach( p_dec );
1143
1144     free( p_dec->p_owner );
1145 }
1146
1147 /*****************************************************************************
1148  * Buffers allocation callbacks for the decoders
1149  *****************************************************************************/
1150 static aout_buffer_t *aout_new_buffer( decoder_t *p_dec, int i_samples )
1151 {
1152     decoder_owner_sys_t *p_sys = (decoder_owner_sys_t *)p_dec->p_owner;
1153     aout_buffer_t *p_buffer;
1154
1155     if( p_sys->p_aout_input != NULL &&
1156         ( p_dec->fmt_out.audio.i_rate != p_sys->audio.i_rate ||
1157           p_dec->fmt_out.audio.i_original_channels !=
1158               p_sys->audio.i_original_channels ||
1159           p_dec->fmt_out.audio.i_bytes_per_frame !=
1160               p_sys->audio.i_bytes_per_frame ) )
1161     {
1162         /* Parameters changed, restart the aout */
1163         aout_DecDelete( p_sys->p_aout, p_sys->p_aout_input );
1164         p_sys->p_aout_input = NULL;
1165     }
1166
1167     if( p_sys->p_aout_input == NULL )
1168     {
1169         audio_sample_format_t format;
1170         int i_force_dolby = config_GetInt( p_dec, "force-dolby-surround" );
1171
1172         p_dec->fmt_out.audio.i_format = p_dec->fmt_out.i_codec;
1173         p_sys->audio = p_dec->fmt_out.audio;
1174
1175         memcpy( &format, &p_sys->audio, sizeof( audio_sample_format_t ) );
1176         if ( i_force_dolby && (format.i_original_channels&AOUT_CHAN_PHYSMASK)
1177                                     == (AOUT_CHAN_LEFT|AOUT_CHAN_RIGHT) )
1178         {
1179             if ( i_force_dolby == 1 )
1180             {
1181                 format.i_original_channels = format.i_original_channels |
1182                                              AOUT_CHAN_DOLBYSTEREO;
1183             }
1184             else /* i_force_dolby == 2 */
1185             {
1186                 format.i_original_channels = format.i_original_channels &
1187                                              ~AOUT_CHAN_DOLBYSTEREO;
1188             }
1189         }
1190
1191         p_sys->p_aout_input =
1192             aout_DecNew( p_dec, &p_sys->p_aout, &format, &p_dec->fmt_out.audio_replay_gain );
1193         if( p_sys->p_aout_input == NULL )
1194         {
1195             msg_Err( p_dec, "failed to create audio output" );
1196             p_dec->b_error = true;
1197             return NULL;
1198         }
1199         p_dec->fmt_out.audio.i_bytes_per_frame =
1200             p_sys->audio.i_bytes_per_frame;
1201     }
1202
1203     p_buffer = aout_DecNewBuffer( p_sys->p_aout_input, i_samples );
1204
1205     return p_buffer;
1206 }
1207
1208 static void aout_del_buffer( decoder_t *p_dec, aout_buffer_t *p_buffer )
1209 {
1210     aout_DecDeleteBuffer( p_dec->p_owner->p_aout,
1211                           p_dec->p_owner->p_aout_input, p_buffer );
1212 }
1213
1214 static picture_t *vout_new_buffer( decoder_t *p_dec )
1215 {
1216     decoder_owner_sys_t *p_sys = (decoder_owner_sys_t *)p_dec->p_owner;
1217     picture_t *p_pic;
1218
1219     if( p_sys->p_vout == NULL ||
1220         p_dec->fmt_out.video.i_width != p_sys->video.i_width ||
1221         p_dec->fmt_out.video.i_height != p_sys->video.i_height ||
1222         p_dec->fmt_out.video.i_chroma != p_sys->video.i_chroma ||
1223         p_dec->fmt_out.video.i_aspect != p_sys->video.i_aspect )
1224     {
1225         if( !p_dec->fmt_out.video.i_width ||
1226             !p_dec->fmt_out.video.i_height )
1227         {
1228             /* Can't create a new vout without display size */
1229             return NULL;
1230         }
1231
1232         if( !p_dec->fmt_out.video.i_visible_width ||
1233             !p_dec->fmt_out.video.i_visible_height )
1234         {
1235             if( p_dec->fmt_in.video.i_visible_width &&
1236                 p_dec->fmt_in.video.i_visible_height )
1237             {
1238                 p_dec->fmt_out.video.i_visible_width =
1239                     p_dec->fmt_in.video.i_visible_width;
1240                 p_dec->fmt_out.video.i_visible_height =
1241                     p_dec->fmt_in.video.i_visible_height;
1242             }
1243             else
1244             {
1245                 p_dec->fmt_out.video.i_visible_width =
1246                     p_dec->fmt_out.video.i_width;
1247                 p_dec->fmt_out.video.i_visible_height =
1248                     p_dec->fmt_out.video.i_height;
1249             }
1250         }
1251
1252         if( p_dec->fmt_out.video.i_visible_height == 1088 &&
1253             var_CreateGetBool( p_dec, "hdtv-fix" ) )
1254         {
1255             p_dec->fmt_out.video.i_visible_height = 1080;
1256             p_dec->fmt_out.video.i_sar_num *= 135;
1257             p_dec->fmt_out.video.i_sar_den *= 136;
1258             msg_Warn( p_dec, "Fixing broken HDTV stream (display_height=1088)");
1259         }
1260
1261         if( !p_dec->fmt_out.video.i_sar_num ||
1262             !p_dec->fmt_out.video.i_sar_den )
1263         {
1264             p_dec->fmt_out.video.i_sar_num = p_dec->fmt_out.video.i_aspect *
1265               p_dec->fmt_out.video.i_visible_height;
1266
1267             p_dec->fmt_out.video.i_sar_den = VOUT_ASPECT_FACTOR *
1268               p_dec->fmt_out.video.i_visible_width;
1269         }
1270
1271         vlc_ureduce( &p_dec->fmt_out.video.i_sar_num,
1272                      &p_dec->fmt_out.video.i_sar_den,
1273                      p_dec->fmt_out.video.i_sar_num,
1274                      p_dec->fmt_out.video.i_sar_den, 50000 );
1275
1276         p_dec->fmt_out.video.i_chroma = p_dec->fmt_out.i_codec;
1277         p_sys->video = p_dec->fmt_out.video;
1278
1279         p_sys->p_vout = vout_Request( p_dec, p_sys->p_vout,
1280                                       &p_dec->fmt_out.video );
1281         if( p_sys->p_vout == NULL )
1282         {
1283             msg_Err( p_dec, "failed to create video output" );
1284             p_dec->b_error = true;
1285             return NULL;
1286         }
1287
1288         if( p_sys->video.i_rmask )
1289             p_sys->p_vout->render.i_rmask = p_sys->video.i_rmask;
1290         if( p_sys->video.i_gmask )
1291             p_sys->p_vout->render.i_gmask = p_sys->video.i_gmask;
1292         if( p_sys->video.i_bmask )
1293             p_sys->p_vout->render.i_bmask = p_sys->video.i_bmask;
1294     }
1295
1296     /* Get a new picture */
1297     while( !(p_pic = vout_CreatePicture( p_sys->p_vout, 0, 0, 0 ) ) )
1298     {
1299         int i_pic, i_ready_pic = 0;
1300
1301         if( p_dec->b_die || p_dec->b_error )
1302         {
1303             return NULL;
1304         }
1305
1306 #define p_pic p_dec->p_owner->p_vout->render.pp_picture[i_pic]
1307         /* Check the decoder doesn't leak pictures */
1308         for( i_pic = 0; i_pic < p_dec->p_owner->p_vout->render.i_pictures;
1309              i_pic++ )
1310         {
1311             if( p_pic->i_status == READY_PICTURE )
1312             {
1313                 if( i_ready_pic++ > 0 ) break;
1314                 else continue;
1315             }
1316
1317             if( p_pic->i_status != DISPLAYED_PICTURE &&
1318                 p_pic->i_status != RESERVED_PICTURE &&
1319                 p_pic->i_status != READY_PICTURE ) break;
1320
1321             if( !p_pic->i_refcount && p_pic->i_status != RESERVED_PICTURE )
1322                 break;
1323         }
1324         if( i_pic == p_dec->p_owner->p_vout->render.i_pictures )
1325         {
1326             msg_Err( p_dec, "decoder is leaking pictures, resetting the heap" );
1327
1328             /* Just free all the pictures */
1329             for( i_pic = 0; i_pic < p_dec->p_owner->p_vout->render.i_pictures;
1330                  i_pic++ )
1331             {
1332                 if( p_pic->i_status == RESERVED_PICTURE )
1333                     vout_DestroyPicture( p_dec->p_owner->p_vout, p_pic );
1334                 if( p_pic->i_refcount > 0 )
1335                 vout_UnlinkPicture( p_dec->p_owner->p_vout, p_pic );
1336             }
1337         }
1338 #undef p_pic
1339
1340         msleep( VOUT_OUTMEM_SLEEP );
1341     }
1342
1343     return p_pic;
1344 }
1345
1346 static void vout_del_buffer( decoder_t *p_dec, picture_t *p_pic )
1347 {
1348     VoutDisplayedPicture( p_dec->p_owner->p_vout, p_pic );
1349 }
1350
1351 static void vout_link_picture( decoder_t *p_dec, picture_t *p_pic )
1352 {
1353     vout_LinkPicture( p_dec->p_owner->p_vout, p_pic );
1354 }
1355
1356 static void vout_unlink_picture( decoder_t *p_dec, picture_t *p_pic )
1357 {
1358     vout_UnlinkPicture( p_dec->p_owner->p_vout, p_pic );
1359 }
1360
1361 static subpicture_t *spu_new_buffer( decoder_t *p_dec )
1362 {
1363     decoder_owner_sys_t *p_sys = (decoder_owner_sys_t *)p_dec->p_owner;
1364     vout_thread_t *p_vout = NULL;
1365     subpicture_t *p_subpic;
1366     int i_attempts = 30;
1367
1368     while( i_attempts-- )
1369     {
1370         if( p_dec->b_die || p_dec->b_error ) break;
1371
1372         p_vout = vlc_object_find( p_dec, VLC_OBJECT_VOUT, FIND_ANYWHERE );
1373         if( p_vout ) break;
1374
1375         msleep( VOUT_DISPLAY_DELAY );
1376     }
1377
1378     if( !p_vout )
1379     {
1380         msg_Warn( p_dec, "no vout found, dropping subpicture" );
1381         return NULL;
1382     }
1383
1384     if( p_sys->p_spu_vout != p_vout )
1385     {
1386         spu_Control( p_vout->p_spu, SPU_CHANNEL_REGISTER,
1387                      &p_sys->i_spu_channel );
1388         p_sys->p_spu_vout = p_vout;
1389     }
1390
1391     p_subpic = spu_CreateSubpicture( p_vout->p_spu );
1392     if( p_subpic )
1393     {
1394         p_subpic->i_channel = p_sys->i_spu_channel;
1395     }
1396
1397     vlc_object_release( p_vout );
1398
1399     return p_subpic;
1400 }
1401
1402 static void spu_del_buffer( decoder_t *p_dec, subpicture_t *p_subpic )
1403 {
1404     decoder_owner_sys_t *p_sys = (decoder_owner_sys_t *)p_dec->p_owner;
1405     vout_thread_t *p_vout = NULL;
1406
1407     p_vout = vlc_object_find( p_dec, VLC_OBJECT_VOUT, FIND_ANYWHERE );
1408     if( !p_vout || p_sys->p_spu_vout != p_vout )
1409     {
1410         if( p_vout )
1411             vlc_object_release( p_vout );
1412         msg_Warn( p_dec, "no vout found, leaking subpicture" );
1413         return;
1414     }
1415
1416     spu_DestroySubpicture( p_vout->p_spu, p_subpic );
1417
1418     vlc_object_release( p_vout );
1419 }
1420