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@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., 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 subpicture_t *spu_new_buffer( decoder_t * );
  55 static void spu_del_buffer( decoder_t *, subpicture_t * );
  56
  57 static es_format_t null_es_format = {0};
  58
  59 struct decoder_owner_sys_t
  60 {
  61     vlc_bool_t      b_own_thread;
  62
  63     input_thread_t  *p_input;
  64
  65     aout_instance_t *p_aout;
  66     aout_input_t    *p_aout_input;
  67
  68     vout_thread_t   *p_vout;
  69
  70     vout_thread_t   *p_spu_vout;
  71     int              i_spu_channel;
  72
  73     sout_instance_t         *p_sout;
  74     sout_packetizer_input_t *p_sout_input;
  75
  76     /* Some decoders require already packetized data (ie. not truncated) */
  77     decoder_t *p_packetizer;
  78
  79     /* Current format in use by the output */
  80     video_format_t video;
  81     audio_format_t audio;
  82     es_format_t    sout;
  83
  84     /* fifo */
  85     block_fifo_t *p_fifo;
  86 };
  87
  88
  89 /**
  90  * Spawns a new decoder thread
  91  *
  92  * \param p_input the input thread
  93  * \param p_es the es descriptor
  94  * \return the spawned decoder object
  95  */
  96 decoder_t *input_DecoderNew( input_thread_t *p_input,
  97                              es_format_t *fmt, vlc_bool_t b_force_decoder )
  98 {
  99     decoder_t   *p_dec = NULL;
 100     vlc_value_t val;
 101
 102     /* If we are in sout mode, search for packetizer module */
 103     if( p_input->p_sout && !b_force_decoder )
 104     {
 105         /* Create the decoder configuration structure */
 106         p_dec = CreateDecoder( p_input, fmt, VLC_OBJECT_PACKETIZER );
 107         if( p_dec == NULL )
 108         {
 109             msg_Err( p_input, "could not create packetizer" );
 110             return NULL;
 111         }
 112     }
 113     else
 114     {
 115         /* Create the decoder configuration structure */
 116         p_dec = CreateDecoder( p_input, fmt, VLC_OBJECT_DECODER );
 117         if( p_dec == NULL )
 118         {
 119             msg_Err( p_input, "could not create decoder" );
 120             return NULL;
 121         }
 122     }
 123
 124     if( !p_dec->p_module )
 125     {
 126         msg_Err( p_dec, "no suitable decoder module for fourcc `%4.4s'.\n"
 127                  "VLC probably does not support this sound or video format.",
 128                  (char*)&p_dec->fmt_in.i_codec );
 129
 130         DeleteDecoder( p_dec );
 131         vlc_object_destroy( p_dec );
 132         return NULL;
 133     }
 134
 135     if( p_input->p_sout && p_input->input.b_can_pace_control &&
 136         !b_force_decoder )
 137     {
 138         msg_Dbg( p_input, "stream out mode -> no decoder thread" );
 139         p_dec->p_owner->b_own_thread = VLC_FALSE;
 140     }
 141     else
 142     {
 143         var_Get( p_input, "minimize-threads", &val );
 144         p_dec->p_owner->b_own_thread = !val.b_bool;
 145     }
 146
 147     if( p_dec->p_owner->b_own_thread )
 148     {
 149         int i_priority;
 150         if( fmt->i_cat == AUDIO_ES )
 151             i_priority = VLC_THREAD_PRIORITY_AUDIO;
 152         else
 153             i_priority = VLC_THREAD_PRIORITY_VIDEO;
 154
 155         /* Spawn the decoder thread */
 156         if( vlc_thread_create( p_dec, "decoder", DecoderThread,
 157                                i_priority, VLC_FALSE ) )
 158         {
 159             msg_Err( p_dec, "cannot spawn decoder thread \"%s\"",
 160                              p_dec->p_module->psz_object_name );
 161             module_Unneed( p_dec, p_dec->p_module );
 162             DeleteDecoder( p_dec );
 163             vlc_object_destroy( p_dec );
 164             return NULL;
 165         }
 166     }
 167
 168     return p_dec;
 169 }
 170
 171 /**
 172  * Kills a decoder thread and waits until it's finished
 173  *
 174  * \param p_input the input thread
 175  * \param p_es the es descriptor
 176  * \return nothing
 177  */
 178 void input_DecoderDelete( decoder_t *p_dec )
 179 {
 180     p_dec->b_die = VLC_TRUE;
 181
 182     if( p_dec->p_owner->b_own_thread )
 183     {
 184         /* Make sure the thread leaves the function by
 185          * sending it an empty block. */
 186         block_t *p_block = block_New( p_dec, 0 );
 187         input_DecoderDecode( p_dec, p_block );
 188
 189         vlc_thread_join( p_dec );
 190
 191         /* Don't module_Unneed() here because of the dll loader that wants
 192          * close() in the same thread than open()/decode() */
 193     }
 194     else
 195     {
 196         /* Flush */
 197         input_DecoderDecode( p_dec, NULL );
 198
 199         module_Unneed( p_dec, p_dec->p_module );
 200     }
 201
 202     /* Delete decoder configuration */
 203     DeleteDecoder( p_dec );
 204
 205     /* Delete the decoder */
 206     vlc_object_destroy( p_dec );
 207 }
 208
 209 /**
 210  * Put a block_t in the decoder's fifo.
 211  *
 212  * \param p_dec the decoder object
 213  * \param p_block the data block
 214  */
 215 void input_DecoderDecode( decoder_t * p_dec, block_t *p_block )
 216 {
 217     if( p_dec->p_owner->b_own_thread )
 218     {
 219         if( p_dec->p_owner->p_input->b_out_pace_control )
 220         {
 221             /* FIXME !!!!! */
 222             while( !p_dec->b_die && !p_dec->b_error &&
 223                    p_dec->p_owner->p_fifo->i_depth > 10 )
 224             {
 225                 msleep( 1000 );
 226             }
 227         }
 228         else if( p_dec->p_owner->p_fifo->i_size > 50000000 /* 50 MB */ )
 229         {
 230             /* FIXME: ideally we would check the time amount of data
 231              * in the fifo instead of its size. */
 232             msg_Warn( p_dec, "decoder/packetizer fifo full (data not "
 233                       "consummed quickly enough), resetting fifo!" );
 234             block_FifoEmpty( p_dec->p_owner->p_fifo );
 235         }
 236
 237         block_FifoPut( p_dec->p_owner->p_fifo, p_block );
 238     }
 239     else
 240     {
 241         if( p_dec->b_error || (p_block && p_block->i_buffer <= 0) )
 242         {
 243             if( p_block ) block_Release( p_block );
 244         }
 245         else
 246         {
 247             DecoderDecode( p_dec, p_block );
 248         }
 249     }
 250 }
 251
 252 void input_DecoderDiscontinuity( decoder_t * p_dec )
 253 {
 254     block_t *p_null;
 255
 256     /* Empty the fifo */
 257     if( p_dec->p_owner->b_own_thread )
 258     {
 259         block_FifoEmpty( p_dec->p_owner->p_fifo );
 260     }
 261
 262     /* Send a special block */
 263     p_null = block_New( p_dec, 128 );
 264     p_null->i_flags |= BLOCK_FLAG_DISCONTINUITY;
 265     memset( p_null->p_buffer, 0, p_null->i_buffer );
 266
 267     input_DecoderDecode( p_dec, p_null );
 268 }
 269
 270 vlc_bool_t input_DecoderEmpty( decoder_t * p_dec )
 271 {
 272     if( p_dec->p_owner->b_own_thread && p_dec->p_owner->p_fifo->i_depth > 0 )
 273     {
 274         return VLC_FALSE;
 275     }
 276     return VLC_TRUE;
 277 }
 278
 279 #if 0
 280 /**
 281  * Create a NULL packet for padding in case of a data loss
 282  *
 283  * \param p_input the input thread
 284  * \param p_es es descriptor
 285  * \return nothing
 286  */
 287 static void input_NullPacket( input_thread_t * p_input,
 288                               es_descriptor_t * p_es )
 289 {
 290 #if 0
 291     block_t *p_block = block_New( p_input, PADDING_PACKET_SIZE );
 292     if( p_block )
 293     {
 294         memset( p_block->p_buffer, 0, PADDING_PACKET_SIZE );
 295         p_block->i_flags |= BLOCK_FLAG_DISCONTINUITY;
 296
 297         block_FifoPut( p_es->p_dec->p_owner->p_fifo, p_block );
 298     }
 299 #endif
 300 }
 301
 302 /**
 303  * Send a NULL packet to the decoders
 304  *
 305  * \param p_input the input thread
 306  * \return nothing
 307  */
 308 void input_EscapeDiscontinuity( input_thread_t * p_input )
 309 {
 310 #if 0
 311     unsigned int i_es, i;
 312
 313     for( i_es = 0; i_es < p_input->stream.i_selected_es_number; i_es++ )
 314     {
 315         es_descriptor_t * p_es = p_input->stream.pp_selected_es[i_es];
 316
 317         if( p_es->p_dec != NULL )
 318         {
 319             for( i = 0; i < PADDING_PACKET_NUMBER; i++ )
 320             {
 321                 input_NullPacket( p_input, p_es );
 322             }
 323         }
 324     }
 325 #endif
 326 }
 327
 328 /**
 329  * Send a NULL packet to the audio decoders
 330  *
 331  * \param p_input the input thread
 332  * \return nothing
 333  */
 334 void input_EscapeAudioDiscontinuity( input_thread_t * p_input )
 335 {
 336 #if 0
 337     unsigned int i_es, i;
 338
 339     for( i_es = 0; i_es < p_input->stream.i_selected_es_number; i_es++ )
 340     {
 341         es_descriptor_t * p_es = p_input->stream.pp_selected_es[i_es];
 342
 343         if( p_es->p_dec != NULL && p_es->i_cat == AUDIO_ES )
 344         {
 345             for( i = 0; i < PADDING_PACKET_NUMBER; i++ )
 346             {
 347                 input_NullPacket( p_input, p_es );
 348             }
 349         }
 350     }
 351 #endif
 352 }
 353 #endif
 354
 355 /**
 356  * Create a decoder object
 357  *
 358  * \param p_input the input thread
 359  * \param p_es the es descriptor
 360  * \param i_object_type Object type as define in include/vlc_objects.h
 361  * \return the decoder object
 362  */
 363 static decoder_t * CreateDecoder( input_thread_t *p_input,
 364                                   es_format_t *fmt, int i_object_type )
 365 {
 366     decoder_t *p_dec;
 367
 368     p_dec = vlc_object_create( p_input, i_object_type );
 369     if( p_dec == NULL )
 370     {
 371         msg_Err( p_input, "out of memory" );
 372         return NULL;
 373     }
 374
 375     p_dec->pf_decode_audio = 0;
 376     p_dec->pf_decode_video = 0;
 377     p_dec->pf_decode_sub = 0;
 378     p_dec->pf_packetize = 0;
 379
 380     /* Initialize the decoder fifo */
 381     p_dec->p_module = NULL;
 382
 383
 384     es_format_Copy( &p_dec->fmt_in, fmt );
 385     es_format_Copy( &p_dec->fmt_out, &null_es_format );
 386
 387     /* Allocate our private structure for the decoder */
 388     p_dec->p_owner = malloc( sizeof( decoder_owner_sys_t ) );
 389     if( p_dec->p_owner == NULL )
 390     {
 391         msg_Err( p_dec, "out of memory" );
 392         return NULL;
 393     }
 394     p_dec->p_owner->b_own_thread = VLC_TRUE;
 395     p_dec->p_owner->p_input = p_input;
 396     p_dec->p_owner->p_aout = NULL;
 397     p_dec->p_owner->p_aout_input = NULL;
 398     p_dec->p_owner->p_vout = NULL;
 399     p_dec->p_owner->p_spu_vout = NULL;
 400     p_dec->p_owner->i_spu_channel = 0;
 401     p_dec->p_owner->p_sout = p_input->p_sout;
 402     p_dec->p_owner->p_sout_input = NULL;
 403     p_dec->p_owner->p_packetizer = NULL;
 404
 405     /* decoder fifo */
 406     if( ( p_dec->p_owner->p_fifo = block_FifoNew( p_dec ) ) == NULL )
 407     {
 408         msg_Err( p_dec, "out of memory" );
 409         return NULL;
 410     }
 411
 412     /* Set buffers allocation callbacks for the decoders */
 413     p_dec->pf_aout_buffer_new = aout_new_buffer;
 414     p_dec->pf_aout_buffer_del = aout_del_buffer;
 415     p_dec->pf_vout_buffer_new = vout_new_buffer;
 416     p_dec->pf_vout_buffer_del = vout_del_buffer;
 417     p_dec->pf_picture_link    = vout_link_picture;
 418     p_dec->pf_picture_unlink  = vout_unlink_picture;
 419     p_dec->pf_spu_buffer_new  = spu_new_buffer;
 420     p_dec->pf_spu_buffer_del  = spu_del_buffer;
 421
 422     vlc_object_attach( p_dec, p_input );
 423
 424     /* Find a suitable decoder/packetizer module */
 425     if( i_object_type == VLC_OBJECT_DECODER )
 426         p_dec->p_module = module_Need( p_dec, "decoder", "$codec", 0 );
 427     else
 428         p_dec->p_module = module_Need( p_dec, "packetizer", "$packetizer", 0 );
 429
 430     /* Check if decoder requires already packetized data */
 431     if( i_object_type == VLC_OBJECT_DECODER &&
 432         p_dec->b_need_packetized && !p_dec->fmt_in.b_packetized )
 433     {
 434         p_dec->p_owner->p_packetizer =
 435             vlc_object_create( p_input, VLC_OBJECT_PACKETIZER );
 436         if( p_dec->p_owner->p_packetizer )
 437         {
 438             es_format_Copy( &p_dec->p_owner->p_packetizer->fmt_in,
 439                             &p_dec->fmt_in );
 440
 441             es_format_Copy( &p_dec->p_owner->p_packetizer->fmt_out,
 442                             &null_es_format );
 443
 444             vlc_object_attach( p_dec->p_owner->p_packetizer, p_input );
 445
 446             p_dec->p_owner->p_packetizer->p_module =
 447                 module_Need( p_dec->p_owner->p_packetizer,
 448                              "packetizer", "$packetizer", 0 );
 449
 450             if( !p_dec->p_owner->p_packetizer->p_module )
 451             {
 452                 es_format_Clean( &p_dec->p_owner->p_packetizer->fmt_in );
 453                 vlc_object_detach( p_dec->p_owner->p_packetizer );
 454                 vlc_object_destroy( p_dec->p_owner->p_packetizer );
 455             }
 456         }
 457     }
 458
 459     return p_dec;
 460 }
 461
 462 /**
 463  * The decoding main loop
 464  *
 465  * \param p_dec the decoder
 466  * \return 0
 467  */
 468 static int DecoderThread( decoder_t * p_dec )
 469 {
 470     block_t *p_block;
 471
 472     /* The decoder's main loop */
 473     while( !p_dec->b_die && !p_dec->b_error )
 474     {
 475         if( ( p_block = block_FifoGet( p_dec->p_owner->p_fifo ) ) == NULL )
 476         {
 477             p_dec->b_error = 1;
 478             break;
 479         }
 480         if( DecoderDecode( p_dec, p_block ) != VLC_SUCCESS )
 481         {
 482             break;
 483         }
 484     }
 485
 486     while( !p_dec->b_die )
 487     {
 488         /* Trash all received PES packets */
 489         p_block = block_FifoGet( p_dec->p_owner->p_fifo );
 490         if( p_block ) block_Release( p_block );
 491     }
 492
 493     /* We do it here because of the dll loader that wants close() in the
 494      * same thread than open()/decode() */
 495     module_Unneed( p_dec, p_dec->p_module );
 496
 497     return 0;
 498 }
 499
 500 /**
 501  * Decode a block
 502  *
 503  * \param p_dec the decoder object
 504  * \param p_block the block to decode
 505  * \return VLC_SUCCESS or an error code
 506  */
 507 static int DecoderDecode( decoder_t *p_dec, block_t *p_block )
 508 {
 509     int i_rate = p_block ? p_block->i_rate : 1000;
 510
 511     if( p_block && p_block->i_buffer <= 0 )
 512     {
 513         block_Release( p_block );
 514         return VLC_SUCCESS;
 515     }
 516
 517     if( p_dec->i_object_type == VLC_OBJECT_PACKETIZER )
 518     {
 519         block_t *p_sout_block;
 520
 521         while( ( p_sout_block =
 522                      p_dec->pf_packetize( p_dec, p_block ? &p_block : 0 ) ) )
 523         {
 524             if( !p_dec->p_owner->p_sout_input )
 525             {
 526                 es_format_Copy( &p_dec->p_owner->sout, &p_dec->fmt_out );
 527
 528                 p_dec->p_owner->sout.i_group = p_dec->fmt_in.i_group;
 529                 p_dec->p_owner->sout.i_id = p_dec->fmt_in.i_id;
 530                 if( p_dec->fmt_in.psz_language )
 531                 {
 532                     p_dec->p_owner->sout.psz_language =
 533                         strdup( p_dec->fmt_in.psz_language );
 534                 }
 535
 536                 p_dec->p_owner->p_sout_input =
 537                     sout_InputNew( p_dec->p_owner->p_sout,
 538                                    &p_dec->p_owner->sout );
 539
 540                 if( p_dec->p_owner->p_sout_input == NULL )
 541                 {
 542                     msg_Err( p_dec, "cannot create packetizer output" );
 543                     p_dec->b_error = VLC_TRUE;
 544
 545                     while( p_sout_block )
 546                     {
 547                         block_t *p_next = p_sout_block->p_next;
 548                         block_Release( p_sout_block );
 549                         p_sout_block = p_next;
 550                     }
 551                     break;
 552                 }
 553             }
 554
 555             while( p_sout_block )
 556             {
 557                 block_t *p_next = p_sout_block->p_next;
 558
 559                 p_sout_block->p_next = NULL;
 560                 p_sout_block->i_rate = i_rate;
 561
 562                 sout_InputSendBuffer( p_dec->p_owner->p_sout_input,
 563                                       p_sout_block );
 564
 565                 p_sout_block = p_next;
 566             }
 567
 568             /* For now it's enough, as only sout inpact on this flag */
 569             if( p_dec->p_owner->p_sout->i_out_pace_nocontrol > 0 &&
 570                 p_dec->p_owner->p_input->b_out_pace_control )
 571             {
 572                 msg_Dbg( p_dec, "switching to synch mode" );
 573                 p_dec->p_owner->p_input->b_out_pace_control = VLC_FALSE;
 574             }
 575             else if( p_dec->p_owner->p_sout->i_out_pace_nocontrol <= 0 &&
 576                      !p_dec->p_owner->p_input->b_out_pace_control )
 577             {
 578                 msg_Dbg( p_dec, "switching to asynch mode" );
 579                 p_dec->p_owner->p_input->b_out_pace_control = VLC_TRUE;
 580             }
 581         }
 582     }
 583     else if( p_dec->fmt_in.i_cat == AUDIO_ES )
 584     {
 585         aout_buffer_t *p_aout_buf;
 586
 587         if( p_dec->p_owner->p_packetizer )
 588         {
 589             block_t *p_packetized_block;
 590             decoder_t *p_packetizer = p_dec->p_owner->p_packetizer;
 591
 592             while( (p_packetized_block =
 593                     p_packetizer->pf_packetize( p_packetizer, &p_block )) )
 594             {
 595                 if( p_packetizer->fmt_out.i_extra && !p_dec->fmt_in.i_extra )
 596                 {
 597                     p_dec->fmt_in.i_extra = p_packetizer->fmt_out.i_extra;
 598                     p_dec->fmt_in.p_extra = malloc( p_dec->fmt_in.i_extra );
 599                     memcpy( p_dec->fmt_in.p_extra,
 600                             p_packetizer->fmt_out.p_extra,
 601                             p_dec->fmt_in.i_extra );
 602                 }
 603
 604                 while( p_packetized_block )
 605                 {
 606                     block_t *p_next = p_packetized_block->p_next;
 607                     p_packetized_block->p_next = NULL;
 608                     p_packetized_block->i_rate = i_rate;
 609
 610                     while( (p_aout_buf = p_dec->pf_decode_audio( p_dec,
 611                                                        &p_packetized_block )) )
 612                     {
 613                         aout_DecPlay( p_dec->p_owner->p_aout,
 614                                       p_dec->p_owner->p_aout_input,
 615                                       p_aout_buf );
 616                     }
 617
 618                     p_packetized_block = p_next;
 619                 }
 620             }
 621         }
 622         else while( (p_aout_buf = p_dec->pf_decode_audio( p_dec, &p_block )) )
 623         {
 624             aout_DecPlay( p_dec->p_owner->p_aout,
 625                           p_dec->p_owner->p_aout_input, p_aout_buf );
 626         }
 627     }
 628     else if( p_dec->fmt_in.i_cat == VIDEO_ES )
 629     {
 630         picture_t *p_pic;
 631
 632         if( p_dec->p_owner->p_packetizer )
 633         {
 634             block_t *p_packetized_block;
 635             decoder_t *p_packetizer = p_dec->p_owner->p_packetizer;
 636
 637             while( (p_packetized_block =
 638                     p_packetizer->pf_packetize( p_packetizer, &p_block )) )
 639             {
 640                 while( p_packetized_block )
 641                 {
 642                     block_t *p_next = p_packetized_block->p_next;
 643                     p_packetized_block->p_next = NULL;
 644                     p_packetized_block->i_rate = i_rate;
 645
 646                     while( (p_pic = p_dec->pf_decode_video( p_dec,
 647                                                        &p_packetized_block )) )
 648                     {
 649                         vout_DatePicture( p_dec->p_owner->p_vout, p_pic,
 650                                           p_pic->date );
 651                         vout_DisplayPicture( p_dec->p_owner->p_vout, p_pic );
 652                     }
 653
 654                     p_packetized_block = p_next;
 655                 }
 656             }
 657         }
 658         else while( (p_pic = p_dec->pf_decode_video( p_dec, &p_block )) )
 659         {
 660             vout_DatePicture( p_dec->p_owner->p_vout, p_pic, p_pic->date );
 661             vout_DisplayPicture( p_dec->p_owner->p_vout, p_pic );
 662         }
 663     }
 664     else if( p_dec->fmt_in.i_cat == SPU_ES )
 665     {
 666         vout_thread_t *p_vout;
 667         subpicture_t *p_spu;
 668         while( (p_spu = p_dec->pf_decode_sub( p_dec, &p_block ) ) )
 669         {
 670             p_vout = vlc_object_find( p_dec, VLC_OBJECT_VOUT, FIND_ANYWHERE );
 671             if( p_vout )
 672             {
 673                 spu_DisplaySubpicture( p_vout->p_spu, p_spu );
 674                 vlc_object_release( p_vout );
 675             }
 676         }
 677     }
 678     else
 679     {
 680         msg_Err( p_dec, "unknown ES format" );
 681         p_dec->b_error = 1;
 682     }
 683
 684     return p_dec->b_error ? VLC_EGENERIC : VLC_SUCCESS;
 685 }
 686
 687 /**
 688  * Destroys a decoder object
 689  *
 690  * \param p_dec the decoder object
 691  * \return nothing
 692  */
 693 static void DeleteDecoder( decoder_t * p_dec )
 694 {
 695     msg_Dbg( p_dec, "killing decoder fourcc `%4.4s', %d PES in FIFO",
 696              (char*)&p_dec->fmt_in.i_codec,
 697              p_dec->p_owner->p_fifo->i_depth );
 698
 699     /* Free all packets still in the decoder fifo. */
 700     block_FifoEmpty( p_dec->p_owner->p_fifo );
 701     block_FifoRelease( p_dec->p_owner->p_fifo );
 702
 703     /* Cleanup */
 704     if( p_dec->p_owner->p_aout_input )
 705         aout_DecDelete( p_dec->p_owner->p_aout, p_dec->p_owner->p_aout_input );
 706
 707     if( p_dec->p_owner->p_vout )
 708     {
 709         int i_pic;
 710
 711 #define p_pic p_dec->p_owner->p_vout->render.pp_picture[i_pic]
 712         /* Hack to make sure all the the pictures are freed by the decoder */
 713         for( i_pic = 0; i_pic < p_dec->p_owner->p_vout->render.i_pictures;
 714              i_pic++ )
 715         {
 716             if( p_pic->i_status == RESERVED_PICTURE )
 717                 vout_DestroyPicture( p_dec->p_owner->p_vout, p_pic );
 718             if( p_pic->i_refcount > 0 )
 719                 vout_UnlinkPicture( p_dec->p_owner->p_vout, p_pic );
 720         }
 721 #undef p_pic
 722
 723         /* We are about to die. Reattach video output to p_vlc. */
 724         vout_Request( p_dec, p_dec->p_owner->p_vout, 0, 0, 0, 0 );
 725     }
 726
 727     if( p_dec->p_owner->p_sout_input )
 728     {
 729         sout_InputDelete( p_dec->p_owner->p_sout_input );
 730         es_format_Clean( &p_dec->p_owner->sout );
 731     }
 732
 733     if( p_dec->fmt_in.i_cat == SPU_ES )
 734     {
 735         vout_thread_t *p_vout;
 736
 737         p_vout = vlc_object_find( p_dec, VLC_OBJECT_VOUT, FIND_ANYWHERE );
 738         if( p_vout )
 739         {
 740             spu_Control( p_vout->p_spu, SPU_CHANNEL_CLEAR,
 741                          p_dec->p_owner->i_spu_channel );
 742             vlc_object_release( p_vout );
 743         }
 744     }
 745
 746     es_format_Clean( &p_dec->fmt_in );
 747     es_format_Clean( &p_dec->fmt_out );
 748
 749     if( p_dec->p_owner->p_packetizer )
 750     {
 751         module_Unneed( p_dec->p_owner->p_packetizer,
 752                        p_dec->p_owner->p_packetizer->p_module );
 753         es_format_Clean( &p_dec->p_owner->p_packetizer->fmt_in );
 754         es_format_Clean( &p_dec->p_owner->p_packetizer->fmt_out );
 755         vlc_object_detach( p_dec->p_owner->p_packetizer );
 756         vlc_object_destroy( p_dec->p_owner->p_packetizer );
 757     }
 758
 759     vlc_object_detach( p_dec );
 760
 761     free( p_dec->p_owner );
 762 }
 763
 764 /*****************************************************************************
 765  * Buffers allocation callbacks for the decoders
 766  *****************************************************************************/
 767 static aout_buffer_t *aout_new_buffer( decoder_t *p_dec, int i_samples )
 768 {
 769     decoder_owner_sys_t *p_sys = (decoder_owner_sys_t *)p_dec->p_owner;
 770     aout_buffer_t *p_buffer;
 771
 772     if( p_sys->p_aout_input != NULL &&
 773         ( p_dec->fmt_out.audio.i_rate != p_sys->audio.i_rate ||
 774           p_dec->fmt_out.audio.i_original_channels !=
 775               p_sys->audio.i_original_channels ||
 776           p_dec->fmt_out.audio.i_bytes_per_frame !=
 777               p_sys->audio.i_bytes_per_frame ) )
 778     {
 779         /* Parameters changed, restart the aout */
 780         aout_DecDelete( p_sys->p_aout, p_sys->p_aout_input );
 781         p_sys->p_aout_input = NULL;
 782     }
 783
 784     if( p_sys->p_aout_input == NULL )
 785     {
 786         p_dec->fmt_out.audio.i_format = p_dec->fmt_out.i_codec;
 787         p_sys->audio = p_dec->fmt_out.audio;
 788         p_sys->p_aout_input =
 789             aout_DecNew( p_dec, &p_sys->p_aout, &p_sys->audio );
 790         if( p_sys->p_aout_input == NULL )
 791         {
 792             msg_Err( p_dec, "failed to create audio output" );
 793             p_dec->b_error = VLC_TRUE;
 794             return NULL;
 795         }
 796         p_dec->fmt_out.audio.i_bytes_per_frame =
 797             p_sys->audio.i_bytes_per_frame;
 798     }
 799
 800     p_buffer = aout_DecNewBuffer( p_sys->p_aout, p_sys->p_aout_input,
 801                                   i_samples );
 802
 803     return p_buffer;
 804 }
 805
 806 static void aout_del_buffer( decoder_t *p_dec, aout_buffer_t *p_buffer )
 807 {
 808     aout_DecDeleteBuffer( p_dec->p_owner->p_aout,
 809                           p_dec->p_owner->p_aout_input, p_buffer );
 810 }
 811
 812 static picture_t *vout_new_buffer( decoder_t *p_dec )
 813 {
 814     decoder_owner_sys_t *p_sys = (decoder_owner_sys_t *)p_dec->p_owner;
 815     picture_t *p_pic;
 816
 817     if( p_sys->p_vout == NULL ||
 818         p_dec->fmt_out.video.i_width != p_sys->video.i_width ||
 819         p_dec->fmt_out.video.i_height != p_sys->video.i_height ||
 820         p_dec->fmt_out.video.i_chroma != p_sys->video.i_chroma ||
 821         p_dec->fmt_out.video.i_aspect != p_sys->video.i_aspect )
 822     {
 823         if( !p_dec->fmt_out.video.i_width ||
 824             !p_dec->fmt_out.video.i_height )
 825         {
 826             /* Can't create a new vout without display size */
 827             return NULL;
 828         }
 829
 830         p_dec->fmt_out.video.i_chroma = p_dec->fmt_out.i_codec;
 831         p_sys->video = p_dec->fmt_out.video;
 832
 833         p_sys->p_vout = vout_Request( p_dec, p_sys->p_vout,
 834                                       p_sys->video.i_width,
 835                                       p_sys->video.i_height,
 836                                       p_sys->video.i_chroma,
 837                                       p_sys->video.i_aspect );
 838
 839         if( p_sys->p_vout == NULL )
 840         {
 841             msg_Err( p_dec, "failed to create video output" );
 842             p_dec->b_error = VLC_TRUE;
 843             return NULL;
 844         }
 845
 846         if( p_sys->video.i_rmask )
 847             p_sys->p_vout->render.i_rmask = p_sys->video.i_rmask;
 848         if( p_sys->video.i_gmask )
 849             p_sys->p_vout->render.i_gmask = p_sys->video.i_gmask;
 850         if( p_sys->video.i_bmask )
 851             p_sys->p_vout->render.i_bmask = p_sys->video.i_bmask;
 852     }
 853
 854     /* Get a new picture */
 855     while( !(p_pic = vout_CreatePicture( p_sys->p_vout, 0, 0, 0 ) ) )
 856     {
 857         int i_pic, i_ready_pic = 0;
 858
 859         if( p_dec->b_die || p_dec->b_error )
 860         {
 861             return NULL;
 862         }
 863
 864 #define p_pic p_dec->p_owner->p_vout->render.pp_picture[i_pic]
 865         /* Check the decoder doesn't leak pictures */
 866         for( i_pic = 0; i_pic < p_dec->p_owner->p_vout->render.i_pictures;
 867              i_pic++ )
 868         {
 869             if( p_pic->i_status == READY_PICTURE )
 870             {
 871                 if( i_ready_pic++ > 0 ) break;
 872                 else continue;
 873             }
 874
 875             if( p_pic->i_status != DISPLAYED_PICTURE &&
 876                 p_pic->i_status != RESERVED_PICTURE &&
 877                 p_pic->i_status != READY_PICTURE ) break;
 878
 879             if( !p_pic->i_refcount && p_pic->i_status != RESERVED_PICTURE )
 880                 break;
 881         }
 882         if( i_pic == p_dec->p_owner->p_vout->render.i_pictures )
 883         {
 884             msg_Err( p_dec, "decoder is leaking pictures, resetting the heap" );
 885
 886             /* Just free all the pictures */
 887             for( i_pic = 0; i_pic < p_dec->p_owner->p_vout->render.i_pictures;
 888                  i_pic++ )
 889             {
 890                 if( p_pic->i_status == RESERVED_PICTURE )
 891                     vout_DestroyPicture( p_dec->p_owner->p_vout, p_pic );
 892                 if( p_pic->i_refcount > 0 )
 893                 vout_UnlinkPicture( p_dec->p_owner->p_vout, p_pic );
 894             }
 895         }
 896 #undef p_pic
 897
 898         msleep( VOUT_OUTMEM_SLEEP );
 899     }
 900
 901     return p_pic;
 902 }
 903
 904 static void vout_del_buffer( decoder_t *p_dec, picture_t *p_pic )
 905 {
 906     vout_DestroyPicture( p_dec->p_owner->p_vout, p_pic );
 907 }
 908
 909 static void vout_link_picture( decoder_t *p_dec, picture_t *p_pic )
 910 {
 911     vout_LinkPicture( p_dec->p_owner->p_vout, p_pic );
 912 }
 913
 914 static void vout_unlink_picture( decoder_t *p_dec, picture_t *p_pic )
 915 {
 916     vout_UnlinkPicture( p_dec->p_owner->p_vout, p_pic );
 917 }
 918
 919 static subpicture_t *spu_new_buffer( decoder_t *p_dec )
 920 {
 921     decoder_owner_sys_t *p_sys = (decoder_owner_sys_t *)p_dec->p_owner;
 922     vout_thread_t *p_vout = NULL;
 923     subpicture_t *p_subpic;
 924     int i_attempts = 30;
 925
 926     while( i_attempts-- )
 927     {
 928         if( p_dec->b_die || p_dec->b_error ) break;
 929
 930         p_vout = vlc_object_find( p_dec, VLC_OBJECT_VOUT, FIND_ANYWHERE );
 931         if( p_vout ) break;
 932
 933         msleep( VOUT_DISPLAY_DELAY );
 934     }
 935
 936     if( !p_vout )
 937     {
 938         msg_Warn( p_dec, "no vout found, dropping subpicture" );
 939         return NULL;
 940     }
 941
 942     if( p_sys->p_spu_vout != p_vout )
 943     {
 944         spu_Control( p_vout->p_spu, SPU_CHANNEL_REGISTER,
 945                      &p_sys->i_spu_channel );
 946         p_sys->p_spu_vout = p_vout;
 947     }
 948
 949     p_subpic = spu_CreateSubpicture( p_vout->p_spu );
 950     p_subpic->i_channel = p_sys->i_spu_channel;
 951
 952     vlc_object_release( p_vout );
 953
 954     return p_subpic;
 955 }
 956
 957 static void spu_del_buffer( decoder_t *p_dec, subpicture_t *p_subpic )
 958 {
 959     spu_DestroySubpicture( p_dec->p_owner->p_vout->p_spu, p_subpic );
 960 }