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 VideoLAN
   5  * $Id$
   6  *
   7  * Authors: Christophe Massiot <massiot@via.ecp.fr>
   8  *          Gildas Bazin <gbazin@netcourrier.com>
   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., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
  24  *****************************************************************************/
  25
  26 /*****************************************************************************
  27  * Preamble
  28  *****************************************************************************/
  29 #include <stdlib.h>
  30 #include <vlc/vlc.h>
  31
  32 #include <vlc/decoder.h>
  33 #include <vlc/vout.h>
  34 #include <vlc/input.h>
  35
  36 #include "stream_output.h"
  37 #include "input_internal.h"
  38
  39 static decoder_t * CreateDecoder( input_thread_t *, es_format_t *, int );
  40 static void        DeleteDecoder( decoder_t * );
  41
  42 static int         DecoderThread( decoder_t * );
  43 static int         DecoderDecode( decoder_t * p_dec, block_t *p_block );
  44
  45 /* Buffers allocation callbacks for the decoders */
  46 static aout_buffer_t *aout_new_buffer( decoder_t *, int );
  47 static void aout_del_buffer( decoder_t *, aout_buffer_t * );
  48
  49 static picture_t *vout_new_buffer( decoder_t * );
  50 static void vout_del_buffer( decoder_t *, picture_t * );
  51 static void vout_link_picture( decoder_t *, picture_t * );
  52 static void vout_unlink_picture( decoder_t *, picture_t * );
  53
  54 static es_format_t null_es_format = {0};
  55
  56 struct decoder_owner_sys_t
  57 {
  58     vlc_bool_t      b_own_thread;
  59
  60     input_thread_t  *p_input;
  61
  62     aout_instance_t *p_aout;
  63     aout_input_t    *p_aout_input;
  64
  65     vout_thread_t   *p_vout;
  66
  67     sout_instance_t         *p_sout;
  68     sout_packetizer_input_t *p_sout_input;
  69
  70     /* Some decoders require already packetized data (ie. not truncated) */
  71     decoder_t *p_packetizer;
  72
  73     /* Current format in use by the output */
  74     video_format_t video;
  75     audio_format_t audio;
  76     es_format_t    sout;
  77
  78     /* fifo */
  79     block_fifo_t *p_fifo;
  80 };
  81
  82
  83 /**
  84  * Spawns a new decoder thread
  85  *
  86  * \param p_input the input thread
  87  * \param p_es the es descriptor
  88  * \return the spawned decoder object
  89  */
  90 decoder_t *input_DecoderNew( input_thread_t *p_input,
  91                              es_format_t *fmt, vlc_bool_t b_force_decoder )
  92 {
  93     decoder_t   *p_dec = NULL;
  94     vlc_value_t val;
  95
  96     /* If we are in sout mode, search for packetizer module */
  97     if( p_input->p_sout && !b_force_decoder )
  98     {
  99         /* Create the decoder configuration structure */
 100         p_dec = CreateDecoder( p_input, fmt, VLC_OBJECT_PACKETIZER );
 101         if( p_dec == NULL )
 102         {
 103             msg_Err( p_input, "could not create packetizer" );
 104             return NULL;
 105         }
 106     }
 107     else
 108     {
 109         /* Create the decoder configuration structure */
 110         p_dec = CreateDecoder( p_input, fmt, VLC_OBJECT_DECODER );
 111         if( p_dec == NULL )
 112         {
 113             msg_Err( p_input, "could not create decoder" );
 114             return NULL;
 115         }
 116     }
 117
 118     if( !p_dec->p_module )
 119     {
 120         msg_Err( p_dec, "no suitable decoder module for fourcc `%4.4s'.\n"
 121                  "VLC probably does not support this sound or video format.",
 122                  (char*)&p_dec->fmt_in.i_codec );
 123
 124         DeleteDecoder( p_dec );
 125         vlc_object_destroy( p_dec );
 126         return NULL;
 127     }
 128
 129     if( p_input->p_sout && p_input->input.b_can_pace_control &&
 130         !b_force_decoder )
 131     {
 132         msg_Dbg( p_input, "stream out mode -> no decoder thread" );
 133         p_dec->p_owner->b_own_thread = VLC_FALSE;
 134     }
 135     else
 136     {
 137         var_Get( p_input, "minimize-threads", &val );
 138         p_dec->p_owner->b_own_thread = !val.b_bool;
 139     }
 140
 141     if( p_dec->p_owner->b_own_thread )
 142     {
 143         int i_priority;
 144         if( fmt->i_cat == AUDIO_ES )
 145             i_priority = VLC_THREAD_PRIORITY_AUDIO;
 146         else
 147             i_priority = VLC_THREAD_PRIORITY_VIDEO;
 148
 149         /* Spawn the decoder thread */
 150         if( vlc_thread_create( p_dec, "decoder", DecoderThread,
 151                                i_priority, VLC_FALSE ) )
 152         {
 153             msg_Err( p_dec, "cannot spawn decoder thread \"%s\"",
 154                              p_dec->p_module->psz_object_name );
 155             module_Unneed( p_dec, p_dec->p_module );
 156             DeleteDecoder( p_dec );
 157             vlc_object_destroy( p_dec );
 158             return NULL;
 159         }
 160     }
 161
 162     return p_dec;
 163 }
 164
 165 /**
 166  * Kills a decoder thread and waits until it's finished
 167  *
 168  * \param p_input the input thread
 169  * \param p_es the es descriptor
 170  * \return nothing
 171  */
 172 void input_DecoderDelete( decoder_t *p_dec )
 173 {
 174     p_dec->b_die = VLC_TRUE;
 175
 176     if( p_dec->p_owner->b_own_thread )
 177     {
 178         /* Make sure the thread leaves the function by
 179          * sending it an empty block. */
 180         block_t *p_block = block_New( p_dec, 0 );
 181         input_DecoderDecode( p_dec, p_block );
 182
 183         vlc_thread_join( p_dec );
 184
 185         /* Don't module_Unneed() here because of the dll loader that wants
 186          * close() in the same thread than open()/decode() */
 187     }
 188     else
 189     {
 190         module_Unneed( p_dec, p_dec->p_module );
 191     }
 192
 193     /* Delete decoder configuration */
 194     DeleteDecoder( p_dec );
 195
 196     /* Delete the decoder */
 197     vlc_object_destroy( p_dec );
 198 }
 199
 200 /**
 201  * Put a block_t in the decoder's fifo.
 202  *
 203  * \param p_dec the decoder object
 204  * \param p_block the data block
 205  */
 206 void input_DecoderDecode( decoder_t * p_dec, block_t *p_block )
 207 {
 208     if( p_dec->p_owner->b_own_thread )
 209     {
 210         block_FifoPut( p_dec->p_owner->p_fifo, p_block );
 211
 212         if( p_dec->p_owner->p_input->b_out_pace_control )
 213         {
 214             /* FIXME !!!!! */
 215             while( !p_dec->b_die && !p_dec->b_error &&
 216                    p_dec->p_owner->p_fifo->i_depth > 10 )
 217             {
 218                 msleep( 1000 );
 219             }
 220         }
 221     }
 222     else
 223     {
 224         if( p_dec->b_error || p_block->i_buffer <= 0 )
 225         {
 226             block_Release( p_block );
 227         }
 228         else
 229         {
 230             DecoderDecode( p_dec, p_block );
 231         }
 232     }
 233 }
 234
 235 void input_DecoderDiscontinuity( decoder_t * p_dec )
 236 {
 237     block_t *p_null;
 238
 239     /* Empty the fifo */
 240     if( p_dec->p_owner->b_own_thread )
 241     {
 242         block_FifoEmpty( p_dec->p_owner->p_fifo );
 243     }
 244
 245     /* Send a special block */
 246     p_null = block_New( p_dec, 128 );
 247     p_null->i_flags |= BLOCK_FLAG_DISCONTINUITY;
 248     memset( p_null->p_buffer, 0, p_null->i_buffer );
 249
 250     input_DecoderDecode( p_dec, p_null );
 251 }
 252
 253 vlc_bool_t input_DecoderEmpty( decoder_t * p_dec )
 254 {
 255     if( p_dec->p_owner->b_own_thread && p_dec->p_owner->p_fifo->i_depth > 0 )
 256     {
 257         return VLC_FALSE;
 258     }
 259     return VLC_TRUE;
 260 }
 261
 262 #if 0
 263 /**
 264  * Create a NULL packet for padding in case of a data loss
 265  *
 266  * \param p_input the input thread
 267  * \param p_es es descriptor
 268  * \return nothing
 269  */
 270 static void input_NullPacket( input_thread_t * p_input,
 271                               es_descriptor_t * p_es )
 272 {
 273 #if 0
 274     block_t *p_block = block_New( p_input, PADDING_PACKET_SIZE );
 275     if( p_block )
 276     {
 277         memset( p_block->p_buffer, 0, PADDING_PACKET_SIZE );
 278         p_block->i_flags |= BLOCK_FLAG_DISCONTINUITY;
 279
 280         block_FifoPut( p_es->p_dec->p_owner->p_fifo, p_block );
 281     }
 282 #endif
 283 }
 284
 285 /**
 286  * Send a NULL packet to the decoders
 287  *
 288  * \param p_input the input thread
 289  * \return nothing
 290  */
 291 void input_EscapeDiscontinuity( input_thread_t * p_input )
 292 {
 293 #if 0
 294     unsigned int i_es, i;
 295
 296     for( i_es = 0; i_es < p_input->stream.i_selected_es_number; i_es++ )
 297     {
 298         es_descriptor_t * p_es = p_input->stream.pp_selected_es[i_es];
 299
 300         if( p_es->p_dec != NULL )
 301         {
 302             for( i = 0; i < PADDING_PACKET_NUMBER; i++ )
 303             {
 304                 input_NullPacket( p_input, p_es );
 305             }
 306         }
 307     }
 308 #endif
 309 }
 310
 311 /**
 312  * Send a NULL packet to the audio decoders
 313  *
 314  * \param p_input the input thread
 315  * \return nothing
 316  */
 317 void input_EscapeAudioDiscontinuity( input_thread_t * p_input )
 318 {
 319 #if 0
 320     unsigned int i_es, i;
 321
 322     for( i_es = 0; i_es < p_input->stream.i_selected_es_number; i_es++ )
 323     {
 324         es_descriptor_t * p_es = p_input->stream.pp_selected_es[i_es];
 325
 326         if( p_es->p_dec != NULL && p_es->i_cat == AUDIO_ES )
 327         {
 328             for( i = 0; i < PADDING_PACKET_NUMBER; i++ )
 329             {
 330                 input_NullPacket( p_input, p_es );
 331             }
 332         }
 333     }
 334 #endif
 335 }
 336 #endif
 337
 338 /**
 339  * Create a decoder object
 340  *
 341  * \param p_input the input thread
 342  * \param p_es the es descriptor
 343  * \param i_object_type Object type as define in include/vlc_objects.h
 344  * \return the decoder object
 345  */
 346 static decoder_t * CreateDecoder( input_thread_t *p_input,
 347                                   es_format_t *fmt, int i_object_type )
 348 {
 349     decoder_t *p_dec;
 350
 351     p_dec = vlc_object_create( p_input, i_object_type );
 352     if( p_dec == NULL )
 353     {
 354         msg_Err( p_input, "out of memory" );
 355         return NULL;
 356     }
 357
 358     p_dec->pf_decode_audio = 0;
 359     p_dec->pf_decode_video = 0;
 360     p_dec->pf_decode_sub = 0;
 361     p_dec->pf_packetize = 0;
 362
 363     /* Initialize the decoder fifo */
 364     p_dec->p_module = NULL;
 365
 366
 367     es_format_Copy( &p_dec->fmt_in, fmt );
 368     es_format_Copy( &p_dec->fmt_out, &null_es_format );
 369
 370     /* Allocate our private structure for the decoder */
 371     p_dec->p_owner = malloc( sizeof( decoder_owner_sys_t ) );
 372     if( p_dec->p_owner == NULL )
 373     {
 374         msg_Err( p_dec, "out of memory" );
 375         return NULL;
 376     }
 377     p_dec->p_owner->b_own_thread = VLC_TRUE;
 378     p_dec->p_owner->p_input = p_input;
 379     p_dec->p_owner->p_aout = NULL;
 380     p_dec->p_owner->p_aout_input = NULL;
 381     p_dec->p_owner->p_vout = NULL;
 382     p_dec->p_owner->p_sout = p_input->p_sout;
 383     p_dec->p_owner->p_sout_input = NULL;
 384     p_dec->p_owner->p_packetizer = NULL;
 385
 386
 387     /* decoder fifo */
 388     if( ( p_dec->p_owner->p_fifo = block_FifoNew( p_dec ) ) == NULL )
 389     {
 390         msg_Err( p_dec, "out of memory" );
 391         return NULL;
 392     }
 393     /* Set buffers allocation callbacks for the decoders */
 394     p_dec->pf_aout_buffer_new = aout_new_buffer;
 395     p_dec->pf_aout_buffer_del = aout_del_buffer;
 396     p_dec->pf_vout_buffer_new = vout_new_buffer;
 397     p_dec->pf_vout_buffer_del = vout_del_buffer;
 398     p_dec->pf_picture_link    = vout_link_picture;
 399     p_dec->pf_picture_unlink  = vout_unlink_picture;
 400
 401     vlc_object_attach( p_dec, p_input );
 402
 403     /* Find a suitable decoder/packetizer module */
 404     if( i_object_type == VLC_OBJECT_DECODER )
 405         p_dec->p_module = module_Need( p_dec, "decoder", "$codec", 0 );
 406     else
 407         p_dec->p_module = module_Need( p_dec, "packetizer", "$packetizer", 0 );
 408
 409     /* Check if decoder requires already packetized data */
 410     if( i_object_type == VLC_OBJECT_DECODER &&
 411         p_dec->b_need_packetized && !p_dec->fmt_in.b_packetized )
 412     {
 413         p_dec->p_owner->p_packetizer =
 414             vlc_object_create( p_input, VLC_OBJECT_PACKETIZER );
 415         if( p_dec->p_owner->p_packetizer )
 416         {
 417             es_format_Copy( &p_dec->p_owner->p_packetizer->fmt_in,
 418                             &p_dec->fmt_in );
 419
 420             es_format_Copy( &p_dec->p_owner->p_packetizer->fmt_out,
 421                             &null_es_format );
 422
 423             vlc_object_attach( p_dec->p_owner->p_packetizer, p_input );
 424
 425             p_dec->p_owner->p_packetizer->p_module =
 426                 module_Need( p_dec->p_owner->p_packetizer,
 427                              "packetizer", "$packetizer", 0 );
 428
 429             if( !p_dec->p_owner->p_packetizer->p_module )
 430             {
 431                 es_format_Clean( &p_dec->p_owner->p_packetizer->fmt_in );
 432                 vlc_object_detach( p_dec->p_owner->p_packetizer );
 433                 vlc_object_destroy( p_dec->p_owner->p_packetizer );
 434             }
 435         }
 436     }
 437
 438     return p_dec;
 439 }
 440
 441 /**
 442  * The decoding main loop
 443  *
 444  * \param p_dec the decoder
 445  * \return 0
 446  */
 447 static int DecoderThread( decoder_t * p_dec )
 448 {
 449     block_t *p_block;
 450
 451     /* The decoder's main loop */
 452     while( !p_dec->b_die && !p_dec->b_error )
 453     {
 454         if( ( p_block = block_FifoGet( p_dec->p_owner->p_fifo ) ) == NULL )
 455         {
 456             p_dec->b_error = 1;
 457             break;
 458         }
 459         if( DecoderDecode( p_dec, p_block ) != VLC_SUCCESS )
 460         {
 461             break;
 462         }
 463     }
 464
 465     while( !p_dec->b_die )
 466     {
 467         /* Trash all received PES packets */
 468         p_block = block_FifoGet( p_dec->p_owner->p_fifo );
 469         if( p_block ) block_Release( p_block );
 470     }
 471
 472     /* We do it here because of the dll loader that wants close() in the
 473      * same thread than open()/decode() */
 474     module_Unneed( p_dec, p_dec->p_module );
 475
 476     return 0;
 477 }
 478
 479 /**
 480  * Decode a block
 481  *
 482  * \param p_dec the decoder object
 483  * \param p_block the block to decode
 484  * \return VLC_SUCCESS or an error code
 485  */
 486 static int DecoderDecode( decoder_t *p_dec, block_t *p_block )
 487 {
 488     if( p_block->i_buffer <= 0 )
 489     {
 490         block_Release( p_block );
 491         return VLC_SUCCESS;
 492     }
 493
 494     if( p_dec->i_object_type == VLC_OBJECT_PACKETIZER )
 495     {
 496         block_t *p_sout_block;
 497
 498         while( (p_sout_block = p_dec->pf_packetize( p_dec, &p_block )) )
 499         {
 500             if( !p_dec->p_owner->p_sout_input )
 501             {
 502                 es_format_Copy( &p_dec->p_owner->sout, &p_dec->fmt_out );
 503
 504                 p_dec->p_owner->sout.i_group =p_dec->fmt_in.i_group;
 505                 p_dec->p_owner->sout.i_id = p_dec->fmt_in.i_id;
 506                 if( p_dec->fmt_in.psz_language )
 507                 {
 508                     p_dec->p_owner->sout.psz_language =
 509                         strdup( p_dec->fmt_in.psz_language );
 510                 }
 511
 512                 p_dec->p_owner->p_sout_input =
 513                     sout_InputNew( p_dec->p_owner->p_sout,
 514                                    &p_dec->p_owner->sout );
 515
 516                 if( p_dec->p_owner->p_sout_input == NULL )
 517                 {
 518                     msg_Err( p_dec, "cannot create packetizer output" );
 519                     p_dec->b_error = VLC_TRUE;
 520
 521                     while( p_sout_block )
 522                     {
 523                         block_t *p_next = p_sout_block->p_next;
 524                         block_Release( p_sout_block );
 525                         p_sout_block = p_next;
 526                     }
 527                     break;
 528                 }
 529             }
 530
 531             while( p_sout_block )
 532             {
 533                 block_t       *p_next = p_sout_block->p_next;
 534
 535                 p_sout_block->p_next = NULL;
 536
 537                 sout_InputSendBuffer( p_dec->p_owner->p_sout_input,
 538                                       p_sout_block );
 539
 540                 p_sout_block = p_next;
 541             }
 542
 543             /* For now it's enough, as only sout inpact on this flag */
 544             if( p_dec->p_owner->p_sout->i_out_pace_nocontrol > 0 &&
 545                 p_dec->p_owner->p_input->b_out_pace_control )
 546             {
 547                 msg_Dbg( p_dec, "switching to synch mode" );
 548                 p_dec->p_owner->p_input->b_out_pace_control = VLC_FALSE;
 549             }
 550             else if( p_dec->p_owner->p_sout->i_out_pace_nocontrol <= 0 &&
 551                      !p_dec->p_owner->p_input->b_out_pace_control )
 552             {
 553                 msg_Dbg( p_dec, "switching to asynch mode" );
 554                 p_dec->p_owner->p_input->b_out_pace_control = VLC_TRUE;
 555             }
 556         }
 557     }
 558     else if( p_dec->fmt_in.i_cat == AUDIO_ES )
 559     {
 560         aout_buffer_t *p_aout_buf;
 561
 562         if( p_dec->p_owner->p_packetizer )
 563         {
 564             block_t *p_packetized_block;
 565             decoder_t *p_packetizer = p_dec->p_owner->p_packetizer;
 566
 567             while( (p_packetized_block =
 568                     p_packetizer->pf_packetize( p_packetizer, &p_block )) )
 569             {
 570                 while( (p_aout_buf =
 571                         p_dec->pf_decode_audio( p_dec, &p_packetized_block )) )
 572                 {
 573                     aout_DecPlay( p_dec->p_owner->p_aout,
 574                                   p_dec->p_owner->p_aout_input, p_aout_buf );
 575                 }
 576             }
 577         }
 578         else while( (p_aout_buf = p_dec->pf_decode_audio( p_dec, &p_block )) )
 579         {
 580             aout_DecPlay( p_dec->p_owner->p_aout,
 581                           p_dec->p_owner->p_aout_input, p_aout_buf );
 582         }
 583     }
 584     else if( p_dec->fmt_in.i_cat == VIDEO_ES )
 585     {
 586         picture_t *p_pic;
 587
 588         if( p_dec->p_owner->p_packetizer )
 589         {
 590             block_t *p_packetized_block;
 591             decoder_t *p_packetizer = p_dec->p_owner->p_packetizer;
 592
 593             while( (p_packetized_block =
 594                     p_packetizer->pf_packetize( p_packetizer, &p_block )) )
 595             {
 596                 while( (p_pic =
 597                         p_dec->pf_decode_video( p_dec, &p_packetized_block )) )
 598                 {
 599                     vout_DatePicture( p_dec->p_owner->p_vout, p_pic,
 600                                       p_pic->date );
 601                     vout_DisplayPicture( p_dec->p_owner->p_vout, p_pic );
 602                 }
 603             }
 604         }
 605         else while( (p_pic = p_dec->pf_decode_video( p_dec, &p_block )) )
 606         {
 607             vout_DatePicture( p_dec->p_owner->p_vout, p_pic, p_pic->date );
 608             vout_DisplayPicture( p_dec->p_owner->p_vout, p_pic );
 609         }
 610     }
 611     else if( p_dec->fmt_in.i_cat == SPU_ES )
 612     {
 613         p_dec->pf_decode_sub( p_dec, &p_block );
 614     }
 615     else
 616     {
 617         msg_Err( p_dec, "unknown ES format" );
 618         p_dec->b_error = 1;
 619     }
 620
 621     return p_dec->b_error ? VLC_EGENERIC : VLC_SUCCESS;
 622 }
 623
 624 /**
 625  * Destroys a decoder object
 626  *
 627  * \param p_dec the decoder object
 628  * \return nothing
 629  */
 630 static void DeleteDecoder( decoder_t * p_dec )
 631 {
 632     vlc_object_detach( p_dec );
 633
 634     msg_Dbg( p_dec, "killing decoder fourcc `%4.4s', %d PES in FIFO",
 635              (char*)&p_dec->fmt_in.i_codec,
 636              p_dec->p_owner->p_fifo->i_depth );
 637
 638     /* Free all packets still in the decoder fifo. */
 639     block_FifoEmpty( p_dec->p_owner->p_fifo );
 640     block_FifoRelease( p_dec->p_owner->p_fifo );
 641
 642    /* Cleanup */
 643     if( p_dec->p_owner->p_aout_input )
 644         aout_DecDelete( p_dec->p_owner->p_aout, p_dec->p_owner->p_aout_input );
 645
 646     if( p_dec->p_owner->p_vout )
 647     {
 648         int i_pic;
 649
 650 #define p_pic p_dec->p_owner->p_vout->render.pp_picture[i_pic]
 651         /* Hack to make sure all the the pictures are freed by the decoder */
 652         for( i_pic = 0; i_pic < p_dec->p_owner->p_vout->render.i_pictures;
 653              i_pic++ )
 654         {
 655             if( p_pic->i_status == RESERVED_PICTURE )
 656                 vout_DestroyPicture( p_dec->p_owner->p_vout, p_pic );
 657             if( p_pic->i_refcount > 0 )
 658                 vout_UnlinkPicture( p_dec->p_owner->p_vout, p_pic );
 659         }
 660 #undef p_pic
 661
 662         /* We are about to die. Reattach video output to p_vlc. */
 663         vout_Request( p_dec, p_dec->p_owner->p_vout, 0, 0, 0, 0 );
 664     }
 665
 666     if( p_dec->p_owner->p_sout_input )
 667     {
 668         sout_InputDelete( p_dec->p_owner->p_sout_input );
 669         es_format_Clean( &p_dec->p_owner->sout );
 670     }
 671
 672     es_format_Clean( &p_dec->fmt_in );
 673     es_format_Clean( &p_dec->fmt_out );
 674
 675     if( p_dec->p_owner->p_packetizer )
 676     {
 677         module_Unneed( p_dec->p_owner->p_packetizer,
 678                        p_dec->p_owner->p_packetizer->p_module );
 679         es_format_Clean( &p_dec->p_owner->p_packetizer->fmt_in );
 680         es_format_Clean( &p_dec->p_owner->p_packetizer->fmt_out );
 681         vlc_object_detach( p_dec->p_owner->p_packetizer );
 682         vlc_object_destroy( p_dec->p_owner->p_packetizer );
 683     }
 684
 685     free( p_dec->p_owner );
 686 }
 687
 688 /*****************************************************************************
 689  * Buffers allocation callbacks for the decoders
 690  *****************************************************************************/
 691 static aout_buffer_t *aout_new_buffer( decoder_t *p_dec, int i_samples )
 692 {
 693     decoder_owner_sys_t *p_sys = (decoder_owner_sys_t *)p_dec->p_owner;
 694     aout_buffer_t *p_buffer;
 695
 696     if( p_sys->p_aout_input != NULL &&
 697         ( p_dec->fmt_out.audio.i_rate != p_sys->audio.i_rate ||
 698           p_dec->fmt_out.audio.i_original_channels !=
 699               p_sys->audio.i_original_channels ||
 700           p_dec->fmt_out.audio.i_bytes_per_frame !=
 701               p_sys->audio.i_bytes_per_frame ) )
 702     {
 703         /* Parameters changed, restart the aout */
 704         aout_DecDelete( p_sys->p_aout, p_sys->p_aout_input );
 705         p_sys->p_aout_input = NULL;
 706     }
 707
 708     if( p_sys->p_aout_input == NULL )
 709     {
 710         p_dec->fmt_out.audio.i_format = p_dec->fmt_out.i_codec;
 711         p_sys->audio = p_dec->fmt_out.audio;
 712         p_sys->p_aout_input =
 713             aout_DecNew( p_dec, &p_sys->p_aout, &p_sys->audio );
 714         if( p_sys->p_aout_input == NULL )
 715         {
 716             msg_Err( p_dec, "failed to create audio output" );
 717             p_dec->b_error = VLC_TRUE;
 718             return NULL;
 719         }
 720         p_dec->fmt_out.audio.i_bytes_per_frame =
 721             p_sys->audio.i_bytes_per_frame;
 722     }
 723
 724     p_buffer = aout_DecNewBuffer( p_sys->p_aout, p_sys->p_aout_input,
 725                                   i_samples );
 726
 727     return p_buffer;
 728 }
 729
 730 static void aout_del_buffer( decoder_t *p_dec, aout_buffer_t *p_buffer )
 731 {
 732     aout_DecDeleteBuffer( p_dec->p_owner->p_aout,
 733                           p_dec->p_owner->p_aout_input, p_buffer );
 734 }
 735
 736 static picture_t *vout_new_buffer( decoder_t *p_dec )
 737 {
 738     decoder_owner_sys_t *p_sys = (decoder_owner_sys_t *)p_dec->p_owner;
 739     picture_t *p_pic;
 740
 741     if( p_sys->p_vout == NULL ||
 742         p_dec->fmt_out.video.i_width != p_sys->video.i_width ||
 743         p_dec->fmt_out.video.i_height != p_sys->video.i_height ||
 744         p_dec->fmt_out.video.i_chroma != p_sys->video.i_chroma ||
 745         p_dec->fmt_out.video.i_aspect != p_sys->video.i_aspect )
 746     {
 747         if( !p_dec->fmt_out.video.i_width ||
 748             !p_dec->fmt_out.video.i_height )
 749         {
 750             /* Can't create a new vout without display size */
 751             return NULL;
 752         }
 753
 754         p_dec->fmt_out.video.i_chroma = p_dec->fmt_out.i_codec;
 755         p_sys->video = p_dec->fmt_out.video;
 756
 757         p_sys->p_vout = vout_Request( p_dec, p_sys->p_vout,
 758                                       p_sys->video.i_width,
 759                                       p_sys->video.i_height,
 760                                       p_sys->video.i_chroma,
 761                                       p_sys->video.i_aspect );
 762
 763         if( p_sys->p_vout == NULL )
 764         {
 765             msg_Err( p_dec, "failed to create video output" );
 766             p_dec->b_error = VLC_TRUE;
 767             return NULL;
 768         }
 769     }
 770
 771     /* Get a new picture */
 772     while( !(p_pic = vout_CreatePicture( p_sys->p_vout, 0, 0, 0 ) ) )
 773     {
 774         int i_pic, i_ready_pic = 0;
 775
 776         if( p_dec->b_die || p_dec->b_error )
 777         {
 778             return NULL;
 779         }
 780
 781 #define p_pic p_dec->p_owner->p_vout->render.pp_picture[i_pic]
 782         /* Check the decoder doesn't leak pictures */
 783         for( i_pic = 0; i_pic < p_dec->p_owner->p_vout->render.i_pictures;
 784              i_pic++ )
 785         {
 786             if( p_pic->i_status == READY_PICTURE && i_ready_pic++ > 0 ) break;
 787
 788             if( p_pic->i_status != DISPLAYED_PICTURE &&
 789                 p_pic->i_status != RESERVED_PICTURE &&
 790                 p_pic->i_status != READY_PICTURE ) break;
 791
 792             if( !p_pic->i_refcount ) break;
 793         }
 794         if( i_pic == p_dec->p_owner->p_vout->render.i_pictures )
 795         {
 796             msg_Err( p_dec, "decoder is leaking pictures, resetting the heap" );
 797
 798             /* Just free all the pictures */
 799             for( i_pic = 0; i_pic < p_dec->p_owner->p_vout->render.i_pictures;
 800                  i_pic++ )
 801             {
 802                 if( p_pic->i_status == RESERVED_PICTURE )
 803                     vout_DestroyPicture( p_dec->p_owner->p_vout, p_pic );
 804                 if( p_pic->i_refcount > 0 )
 805                 vout_UnlinkPicture( p_dec->p_owner->p_vout, p_pic );
 806             }
 807         }
 808 #undef p_pic
 809
 810         msleep( VOUT_OUTMEM_SLEEP );
 811     }
 812
 813     return p_pic;
 814 }
 815
 816 static void vout_del_buffer( decoder_t *p_dec, picture_t *p_pic )
 817 {
 818     vout_DestroyPicture( p_dec->p_owner->p_vout, p_pic );
 819 }
 820
 821 static void vout_link_picture( decoder_t *p_dec, picture_t *p_pic )
 822 {
 823     vout_LinkPicture( p_dec->p_owner->p_vout, p_pic );
 824 }
 825
 826 static void vout_unlink_picture( decoder_t *p_dec, picture_t *p_pic )
 827 {
 828     vout_UnlinkPicture( p_dec->p_owner->p_vout, p_pic );
 829 }