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     int64_t         i_preroll_end;
  64
  65     input_thread_t  *p_input;
  66
  67     aout_instance_t *p_aout;
  68     aout_input_t    *p_aout_input;
  69
  70     vout_thread_t   *p_vout;
  71
  72     vout_thread_t   *p_spu_vout;
  73     int              i_spu_channel;
  74
  75     sout_instance_t         *p_sout;
  76     sout_packetizer_input_t *p_sout_input;
  77
  78     /* Some decoders require already packetized data (ie. not truncated) */
  79     decoder_t *p_packetizer;
  80
  81     /* Current format in use by the output */
  82     video_format_t video;
  83     audio_format_t audio;
  84     es_format_t    sout;
  85
  86     /* fifo */
  87     block_fifo_t *p_fifo;
  88 };
  89
  90
  91 /**
  92  * Spawns a new decoder thread
  93  *
  94  * \param p_input the input thread
  95  * \param p_es the es descriptor
  96  * \return the spawned decoder object
  97  */
  98 decoder_t *input_DecoderNew( input_thread_t *p_input,
  99                              es_format_t *fmt, vlc_bool_t b_force_decoder )
 100 {
 101     decoder_t   *p_dec = NULL;
 102     vlc_value_t val;
 103
 104     /* If we are in sout mode, search for packetizer module */
 105     if( p_input->p_sout && !b_force_decoder )
 106     {
 107         /* Create the decoder configuration structure */
 108         p_dec = CreateDecoder( p_input, fmt, VLC_OBJECT_PACKETIZER );
 109         if( p_dec == NULL )
 110         {
 111             msg_Err( p_input, "could not create packetizer" );
 112             return NULL;
 113         }
 114     }
 115     else
 116     {
 117         /* Create the decoder configuration structure */
 118         p_dec = CreateDecoder( p_input, fmt, VLC_OBJECT_DECODER );
 119         if( p_dec == NULL )
 120         {
 121             msg_Err( p_input, "could not create decoder" );
 122             return NULL;
 123         }
 124     }
 125
 126     if( !p_dec->p_module )
 127     {
 128         msg_Err( p_dec, "no suitable decoder module for fourcc `%4.4s'.\n"
 129                  "VLC probably does not support this sound or video format.",
 130                  (char*)&p_dec->fmt_in.i_codec );
 131
 132         DeleteDecoder( p_dec );
 133         vlc_object_destroy( p_dec );
 134         return NULL;
 135     }
 136
 137     if( p_input->p_sout && p_input->input.b_can_pace_control &&
 138         !b_force_decoder )
 139     {
 140         msg_Dbg( p_input, "stream out mode -> no decoder thread" );
 141         p_dec->p_owner->b_own_thread = VLC_FALSE;
 142     }
 143     else
 144     {
 145         var_Get( p_input, "minimize-threads", &val );
 146         p_dec->p_owner->b_own_thread = !val.b_bool;
 147     }
 148
 149     if( p_dec->p_owner->b_own_thread )
 150     {
 151         int i_priority;
 152         if( fmt->i_cat == AUDIO_ES )
 153             i_priority = VLC_THREAD_PRIORITY_AUDIO;
 154         else
 155             i_priority = VLC_THREAD_PRIORITY_VIDEO;
 156
 157         /* Spawn the decoder thread */
 158         if( vlc_thread_create( p_dec, "decoder", DecoderThread,
 159                                i_priority, VLC_FALSE ) )
 160         {
 161             msg_Err( p_dec, "cannot spawn decoder thread \"%s\"",
 162                              p_dec->p_module->psz_object_name );
 163             module_Unneed( p_dec, p_dec->p_module );
 164             DeleteDecoder( p_dec );
 165             vlc_object_destroy( p_dec );
 166             return NULL;
 167         }
 168     }
 169
 170     return p_dec;
 171 }
 172
 173 /**
 174  * Kills a decoder thread and waits until it's finished
 175  *
 176  * \param p_input the input thread
 177  * \param p_es the es descriptor
 178  * \return nothing
 179  */
 180 void input_DecoderDelete( decoder_t *p_dec )
 181 {
 182     p_dec->b_die = VLC_TRUE;
 183
 184     if( p_dec->p_owner->b_own_thread )
 185     {
 186         /* Make sure the thread leaves the function by
 187          * sending it an empty block. */
 188         block_t *p_block = block_New( p_dec, 0 );
 189         input_DecoderDecode( p_dec, p_block );
 190
 191         vlc_thread_join( p_dec );
 192
 193         /* Don't module_Unneed() here because of the dll loader that wants
 194          * close() in the same thread than open()/decode() */
 195     }
 196     else
 197     {
 198         /* Flush */
 199         input_DecoderDecode( p_dec, NULL );
 200
 201         module_Unneed( p_dec, p_dec->p_module );
 202     }
 203
 204     /* Delete decoder configuration */
 205     DeleteDecoder( p_dec );
 206
 207     /* Delete the decoder */
 208     vlc_object_destroy( p_dec );
 209 }
 210
 211 /**
 212  * Put a block_t in the decoder's fifo.
 213  *
 214  * \param p_dec the decoder object
 215  * \param p_block the data block
 216  */
 217 void input_DecoderDecode( decoder_t * p_dec, block_t *p_block )
 218 {
 219     if( p_dec->p_owner->b_own_thread )
 220     {
 221         if( p_dec->p_owner->p_input->b_out_pace_control )
 222         {
 223             /* FIXME !!!!! */
 224             while( !p_dec->b_die && !p_dec->b_error &&
 225                    p_dec->p_owner->p_fifo->i_depth > 10 )
 226             {
 227                 msleep( 1000 );
 228             }
 229         }
 230         else if( p_dec->p_owner->p_fifo->i_size > 50000000 /* 50 MB */ )
 231         {
 232             /* FIXME: ideally we would check the time amount of data
 233              * in the fifo instead of its size. */
 234             msg_Warn( p_dec, "decoder/packetizer fifo full (data not "
 235                       "consummed quickly enough), resetting fifo!" );
 236             block_FifoEmpty( p_dec->p_owner->p_fifo );
 237         }
 238
 239         block_FifoPut( p_dec->p_owner->p_fifo, p_block );
 240     }
 241     else
 242     {
 243         if( p_dec->b_error || (p_block && p_block->i_buffer <= 0) )
 244         {
 245             if( p_block ) block_Release( p_block );
 246         }
 247         else
 248         {
 249             DecoderDecode( p_dec, p_block );
 250         }
 251     }
 252 }
 253
 254 void input_DecoderDiscontinuity( decoder_t * p_dec )
 255 {
 256     block_t *p_null;
 257
 258     /* Empty the fifo */
 259     if( p_dec->p_owner->b_own_thread )
 260     {
 261         block_FifoEmpty( p_dec->p_owner->p_fifo );
 262     }
 263
 264     /* Send a special block */
 265     p_null = block_New( p_dec, 128 );
 266     p_null->i_flags |= BLOCK_FLAG_DISCONTINUITY;
 267     memset( p_null->p_buffer, 0, p_null->i_buffer );
 268
 269     input_DecoderDecode( p_dec, p_null );
 270 }
 271
 272 vlc_bool_t input_DecoderEmpty( decoder_t * p_dec )
 273 {
 274     if( p_dec->p_owner->b_own_thread && p_dec->p_owner->p_fifo->i_depth > 0 )
 275     {
 276         return VLC_FALSE;
 277     }
 278     return VLC_TRUE;
 279 }
 280
 281 void input_DecoderPreroll( decoder_t *p_dec, int64_t i_preroll_end )
 282 {
 283     p_dec->p_owner->i_preroll_end = i_preroll_end;
 284 }
 285
 286 #if 0
 287 /**
 288  * Create a NULL packet for padding in case of a data loss
 289  *
 290  * \param p_input the input thread
 291  * \param p_es es descriptor
 292  * \return nothing
 293  */
 294 static void input_NullPacket( input_thread_t * p_input,
 295                               es_descriptor_t * p_es )
 296 {
 297 #if 0
 298     block_t *p_block = block_New( p_input, PADDING_PACKET_SIZE );
 299     if( p_block )
 300     {
 301         memset( p_block->p_buffer, 0, PADDING_PACKET_SIZE );
 302         p_block->i_flags |= BLOCK_FLAG_DISCONTINUITY;
 303
 304         block_FifoPut( p_es->p_dec->p_owner->p_fifo, p_block );
 305     }
 306 #endif
 307 }
 308
 309 /**
 310  * Send a NULL packet to the decoders
 311  *
 312  * \param p_input the input thread
 313  * \return nothing
 314  */
 315 void input_EscapeDiscontinuity( input_thread_t * p_input )
 316 {
 317 #if 0
 318     unsigned int i_es, i;
 319
 320     for( i_es = 0; i_es < p_input->stream.i_selected_es_number; i_es++ )
 321     {
 322         es_descriptor_t * p_es = p_input->stream.pp_selected_es[i_es];
 323
 324         if( p_es->p_dec != NULL )
 325         {
 326             for( i = 0; i < PADDING_PACKET_NUMBER; i++ )
 327             {
 328                 input_NullPacket( p_input, p_es );
 329             }
 330         }
 331     }
 332 #endif
 333 }
 334
 335 /**
 336  * Send a NULL packet to the audio decoders
 337  *
 338  * \param p_input the input thread
 339  * \return nothing
 340  */
 341 void input_EscapeAudioDiscontinuity( input_thread_t * p_input )
 342 {
 343 #if 0
 344     unsigned int i_es, i;
 345
 346     for( i_es = 0; i_es < p_input->stream.i_selected_es_number; i_es++ )
 347     {
 348         es_descriptor_t * p_es = p_input->stream.pp_selected_es[i_es];
 349
 350         if( p_es->p_dec != NULL && p_es->i_cat == AUDIO_ES )
 351         {
 352             for( i = 0; i < PADDING_PACKET_NUMBER; i++ )
 353             {
 354                 input_NullPacket( p_input, p_es );
 355             }
 356         }
 357     }
 358 #endif
 359 }
 360 #endif
 361
 362 /**
 363  * Create a decoder object
 364  *
 365  * \param p_input the input thread
 366  * \param p_es the es descriptor
 367  * \param i_object_type Object type as define in include/vlc_objects.h
 368  * \return the decoder object
 369  */
 370 static decoder_t * CreateDecoder( input_thread_t *p_input,
 371                                   es_format_t *fmt, int i_object_type )
 372 {
 373     decoder_t *p_dec;
 374
 375     p_dec = vlc_object_create( p_input, i_object_type );
 376     if( p_dec == NULL )
 377     {
 378         msg_Err( p_input, "out of memory" );
 379         return NULL;
 380     }
 381
 382     p_dec->pf_decode_audio = 0;
 383     p_dec->pf_decode_video = 0;
 384     p_dec->pf_decode_sub = 0;
 385     p_dec->pf_packetize = 0;
 386
 387     /* Initialize the decoder fifo */
 388     p_dec->p_module = NULL;
 389
 390
 391     es_format_Copy( &p_dec->fmt_in, fmt );
 392     es_format_Copy( &p_dec->fmt_out, &null_es_format );
 393
 394     /* Allocate our private structure for the decoder */
 395     p_dec->p_owner = malloc( sizeof( decoder_owner_sys_t ) );
 396     if( p_dec->p_owner == NULL )
 397     {
 398         msg_Err( p_dec, "out of memory" );
 399         return NULL;
 400     }
 401     p_dec->p_owner->b_own_thread = VLC_TRUE;
 402     p_dec->p_owner->i_preroll_end = -1;
 403     p_dec->p_owner->p_input = p_input;
 404     p_dec->p_owner->p_aout = NULL;
 405     p_dec->p_owner->p_aout_input = NULL;
 406     p_dec->p_owner->p_vout = NULL;
 407     p_dec->p_owner->p_spu_vout = NULL;
 408     p_dec->p_owner->i_spu_channel = 0;
 409     p_dec->p_owner->p_sout = p_input->p_sout;
 410     p_dec->p_owner->p_sout_input = NULL;
 411     p_dec->p_owner->p_packetizer = NULL;
 412
 413     /* decoder fifo */
 414     if( ( p_dec->p_owner->p_fifo = block_FifoNew( p_dec ) ) == NULL )
 415     {
 416         msg_Err( p_dec, "out of memory" );
 417         return NULL;
 418     }
 419
 420     /* Set buffers allocation callbacks for the decoders */
 421     p_dec->pf_aout_buffer_new = aout_new_buffer;
 422     p_dec->pf_aout_buffer_del = aout_del_buffer;
 423     p_dec->pf_vout_buffer_new = vout_new_buffer;
 424     p_dec->pf_vout_buffer_del = vout_del_buffer;
 425     p_dec->pf_picture_link    = vout_link_picture;
 426     p_dec->pf_picture_unlink  = vout_unlink_picture;
 427     p_dec->pf_spu_buffer_new  = spu_new_buffer;
 428     p_dec->pf_spu_buffer_del  = spu_del_buffer;
 429
 430     vlc_object_attach( p_dec, p_input );
 431
 432     /* Find a suitable decoder/packetizer module */
 433     if( i_object_type == VLC_OBJECT_DECODER )
 434         p_dec->p_module = module_Need( p_dec, "decoder", "$codec", 0 );
 435     else
 436         p_dec->p_module = module_Need( p_dec, "packetizer", "$packetizer", 0 );
 437
 438     /* Check if decoder requires already packetized data */
 439     if( i_object_type == VLC_OBJECT_DECODER &&
 440         p_dec->b_need_packetized && !p_dec->fmt_in.b_packetized )
 441     {
 442         p_dec->p_owner->p_packetizer =
 443             vlc_object_create( p_input, VLC_OBJECT_PACKETIZER );
 444         if( p_dec->p_owner->p_packetizer )
 445         {
 446             es_format_Copy( &p_dec->p_owner->p_packetizer->fmt_in,
 447                             &p_dec->fmt_in );
 448
 449             es_format_Copy( &p_dec->p_owner->p_packetizer->fmt_out,
 450                             &null_es_format );
 451
 452             vlc_object_attach( p_dec->p_owner->p_packetizer, p_input );
 453
 454             p_dec->p_owner->p_packetizer->p_module =
 455                 module_Need( p_dec->p_owner->p_packetizer,
 456                              "packetizer", "$packetizer", 0 );
 457
 458             if( !p_dec->p_owner->p_packetizer->p_module )
 459             {
 460                 es_format_Clean( &p_dec->p_owner->p_packetizer->fmt_in );
 461                 vlc_object_detach( p_dec->p_owner->p_packetizer );
 462                 vlc_object_destroy( p_dec->p_owner->p_packetizer );
 463             }
 464         }
 465     }
 466
 467     return p_dec;
 468 }
 469
 470 /**
 471  * The decoding main loop
 472  *
 473  * \param p_dec the decoder
 474  * \return 0
 475  */
 476 static int DecoderThread( decoder_t * p_dec )
 477 {
 478     block_t *p_block;
 479
 480     /* The decoder's main loop */
 481     while( !p_dec->b_die && !p_dec->b_error )
 482     {
 483         if( ( p_block = block_FifoGet( p_dec->p_owner->p_fifo ) ) == NULL )
 484         {
 485             p_dec->b_error = 1;
 486             break;
 487         }
 488         if( DecoderDecode( p_dec, p_block ) != VLC_SUCCESS )
 489         {
 490             break;
 491         }
 492     }
 493
 494     while( !p_dec->b_die )
 495     {
 496         /* Trash all received PES packets */
 497         p_block = block_FifoGet( p_dec->p_owner->p_fifo );
 498         if( p_block ) block_Release( p_block );
 499     }
 500
 501     /* We do it here because of the dll loader that wants close() in the
 502      * same thread than open()/decode() */
 503     module_Unneed( p_dec, p_dec->p_module );
 504
 505     return 0;
 506 }
 507
 508 /**
 509  * Decode a block
 510  *
 511  * \param p_dec the decoder object
 512  * \param p_block the block to decode
 513  * \return VLC_SUCCESS or an error code
 514  */
 515 static int DecoderDecode( decoder_t *p_dec, block_t *p_block )
 516 {
 517     int i_rate = p_block ? p_block->i_rate : 1000;
 518
 519     if( p_block && p_block->i_buffer <= 0 )
 520     {
 521         block_Release( p_block );
 522         return VLC_SUCCESS;
 523     }
 524
 525     if( p_dec->i_object_type == VLC_OBJECT_PACKETIZER )
 526     {
 527         block_t *p_sout_block;
 528
 529         while( ( p_sout_block =
 530                      p_dec->pf_packetize( p_dec, p_block ? &p_block : 0 ) ) )
 531         {
 532             if( !p_dec->p_owner->p_sout_input )
 533             {
 534                 es_format_Copy( &p_dec->p_owner->sout, &p_dec->fmt_out );
 535
 536                 p_dec->p_owner->sout.i_group = p_dec->fmt_in.i_group;
 537                 p_dec->p_owner->sout.i_id = p_dec->fmt_in.i_id;
 538                 if( p_dec->fmt_in.psz_language )
 539                 {
 540                     p_dec->p_owner->sout.psz_language =
 541                         strdup( p_dec->fmt_in.psz_language );
 542                 }
 543
 544                 p_dec->p_owner->p_sout_input =
 545                     sout_InputNew( p_dec->p_owner->p_sout,
 546                                    &p_dec->p_owner->sout );
 547
 548                 if( p_dec->p_owner->p_sout_input == NULL )
 549                 {
 550                     msg_Err( p_dec, "cannot create packetizer output" );
 551                     p_dec->b_error = VLC_TRUE;
 552
 553                     while( p_sout_block )
 554                     {
 555                         block_t *p_next = p_sout_block->p_next;
 556                         block_Release( p_sout_block );
 557                         p_sout_block = p_next;
 558                     }
 559                     break;
 560                 }
 561             }
 562
 563             while( p_sout_block )
 564             {
 565                 block_t *p_next = p_sout_block->p_next;
 566
 567                 p_sout_block->p_next = NULL;
 568                 p_sout_block->i_rate = i_rate;
 569
 570                 sout_InputSendBuffer( p_dec->p_owner->p_sout_input,
 571                                       p_sout_block );
 572
 573                 p_sout_block = p_next;
 574             }
 575
 576             /* For now it's enough, as only sout inpact on this flag */
 577             if( p_dec->p_owner->p_sout->i_out_pace_nocontrol > 0 &&
 578                 p_dec->p_owner->p_input->b_out_pace_control )
 579             {
 580                 msg_Dbg( p_dec, "switching to synch mode" );
 581                 p_dec->p_owner->p_input->b_out_pace_control = VLC_FALSE;
 582             }
 583             else if( p_dec->p_owner->p_sout->i_out_pace_nocontrol <= 0 &&
 584                      !p_dec->p_owner->p_input->b_out_pace_control )
 585             {
 586                 msg_Dbg( p_dec, "switching to asynch mode" );
 587                 p_dec->p_owner->p_input->b_out_pace_control = VLC_TRUE;
 588             }
 589         }
 590     }
 591     else if( p_dec->fmt_in.i_cat == AUDIO_ES )
 592     {
 593         aout_buffer_t *p_aout_buf;
 594
 595         if( p_dec->p_owner->p_packetizer )
 596         {
 597             block_t *p_packetized_block;
 598             decoder_t *p_packetizer = p_dec->p_owner->p_packetizer;
 599
 600             while( (p_packetized_block =
 601                     p_packetizer->pf_packetize( p_packetizer, &p_block )) )
 602             {
 603                 if( p_packetizer->fmt_out.i_extra && !p_dec->fmt_in.i_extra )
 604                 {
 605                     p_dec->fmt_in.i_extra = p_packetizer->fmt_out.i_extra;
 606                     p_dec->fmt_in.p_extra = malloc( p_dec->fmt_in.i_extra );
 607                     memcpy( p_dec->fmt_in.p_extra,
 608                             p_packetizer->fmt_out.p_extra,
 609                             p_dec->fmt_in.i_extra );
 610                 }
 611
 612                 while( p_packetized_block )
 613                 {
 614                     block_t *p_next = p_packetized_block->p_next;
 615                     p_packetized_block->p_next = NULL;
 616                     p_packetized_block->i_rate = i_rate;
 617
 618                     while( (p_aout_buf = p_dec->pf_decode_audio( p_dec,
 619                                                        &p_packetized_block )) )
 620                     {
 621                         /* FIXME the best would be to handle the case start_date < preroll < end_date
 622                          * but that's not easy with non raw audio stream */
 623                         if( p_dec->p_owner->i_preroll_end > 0 &&
 624                             p_aout_buf->start_date < p_dec->p_owner->i_preroll_end )
 625                         {
 626                             aout_DecDeleteBuffer( p_dec->p_owner->p_aout,
 627                                                   p_dec->p_owner->p_aout_input, p_aout_buf );
 628                         }
 629                         else
 630                         {
 631                             p_dec->p_owner->i_preroll_end = -1;
 632                             aout_DecPlay( p_dec->p_owner->p_aout,
 633                                           p_dec->p_owner->p_aout_input,
 634                                           p_aout_buf );
 635                         }
 636                     }
 637
 638                     p_packetized_block = p_next;
 639                 }
 640             }
 641         }
 642         else while( (p_aout_buf = p_dec->pf_decode_audio( p_dec, &p_block )) )
 643         {
 644             if( p_dec->p_owner->i_preroll_end > 0 &&
 645                 p_aout_buf->start_date < p_dec->p_owner->i_preroll_end )
 646             {
 647                 aout_DecDeleteBuffer( p_dec->p_owner->p_aout,
 648                                       p_dec->p_owner->p_aout_input, p_aout_buf );
 649             }
 650             else
 651             {
 652                 p_dec->p_owner->i_preroll_end = -1;
 653                 aout_DecPlay( p_dec->p_owner->p_aout,
 654                               p_dec->p_owner->p_aout_input,
 655                               p_aout_buf );
 656             }
 657         }
 658     }
 659     else if( p_dec->fmt_in.i_cat == VIDEO_ES )
 660     {
 661         picture_t *p_pic;
 662
 663         if( p_dec->p_owner->p_packetizer )
 664         {
 665             block_t *p_packetized_block;
 666             decoder_t *p_packetizer = p_dec->p_owner->p_packetizer;
 667
 668             while( (p_packetized_block =
 669                     p_packetizer->pf_packetize( p_packetizer, &p_block )) )
 670             {
 671                 while( p_packetized_block )
 672                 {
 673                     block_t *p_next = p_packetized_block->p_next;
 674                     p_packetized_block->p_next = NULL;
 675                     p_packetized_block->i_rate = i_rate;
 676
 677                     while( (p_pic = p_dec->pf_decode_video( p_dec,
 678                                                        &p_packetized_block )) )
 679                     {
 680                         if( p_dec->p_owner->i_preroll_end > 0 &&
 681                             p_pic->date < p_dec->p_owner->i_preroll_end )
 682                         {
 683                             vout_DestroyPicture( p_dec->p_owner->p_vout, p_pic );
 684                         }
 685                         else
 686                         {
 687                             p_dec->p_owner->i_preroll_end = -1;
 688                             vout_DatePicture( p_dec->p_owner->p_vout, p_pic,
 689                                               p_pic->date );
 690                             vout_DisplayPicture( p_dec->p_owner->p_vout, p_pic );
 691                         }
 692                     }
 693
 694                     p_packetized_block = p_next;
 695                 }
 696             }
 697         }
 698         else while( (p_pic = p_dec->pf_decode_video( p_dec, &p_block )) )
 699         {
 700             if( p_dec->p_owner->i_preroll_end > 0 &&
 701                 p_pic->date < p_dec->p_owner->i_preroll_end )
 702             {
 703                 vout_DestroyPicture( p_dec->p_owner->p_vout, p_pic );
 704             }
 705             else
 706             {
 707                 p_dec->p_owner->i_preroll_end = -1;
 708                 vout_DatePicture( p_dec->p_owner->p_vout, p_pic, p_pic->date );
 709                 vout_DisplayPicture( p_dec->p_owner->p_vout, p_pic );
 710             }
 711         }
 712     }
 713     else if( p_dec->fmt_in.i_cat == SPU_ES )
 714     {
 715         vout_thread_t *p_vout;
 716         subpicture_t *p_spu;
 717         while( (p_spu = p_dec->pf_decode_sub( p_dec, &p_block ) ) )
 718         {
 719             if( p_dec->p_owner->i_preroll_end > 0 &&
 720                 p_spu->i_start < p_dec->p_owner->i_preroll_end &&
 721                 ( p_spu->i_stop <= 0 || p_spu->i_stop <= p_dec->p_owner->i_preroll_end ) )
 722             {
 723                 spu_DestroySubpicture( p_dec->p_owner->p_vout->p_spu, p_spu );
 724                 continue;
 725             }
 726
 727             p_dec->p_owner->i_preroll_end = -1;
 728             p_vout = vlc_object_find( p_dec, VLC_OBJECT_VOUT, FIND_ANYWHERE );
 729             if( p_vout )
 730             {
 731                 spu_DisplaySubpicture( p_vout->p_spu, p_spu );
 732                 vlc_object_release( p_vout );
 733             }
 734         }
 735     }
 736     else
 737     {
 738         msg_Err( p_dec, "unknown ES format" );
 739         p_dec->b_error = 1;
 740     }
 741
 742     return p_dec->b_error ? VLC_EGENERIC : VLC_SUCCESS;
 743 }
 744
 745 /**
 746  * Destroys a decoder object
 747  *
 748  * \param p_dec the decoder object
 749  * \return nothing
 750  */
 751 static void DeleteDecoder( decoder_t * p_dec )
 752 {
 753     msg_Dbg( p_dec, "killing decoder fourcc `%4.4s', %d PES in FIFO",
 754              (char*)&p_dec->fmt_in.i_codec,
 755              p_dec->p_owner->p_fifo->i_depth );
 756
 757     /* Free all packets still in the decoder fifo. */
 758     block_FifoEmpty( p_dec->p_owner->p_fifo );
 759     block_FifoRelease( p_dec->p_owner->p_fifo );
 760
 761     /* Cleanup */
 762     if( p_dec->p_owner->p_aout_input )
 763         aout_DecDelete( p_dec->p_owner->p_aout, p_dec->p_owner->p_aout_input );
 764
 765     if( p_dec->p_owner->p_vout )
 766     {
 767         int i_pic;
 768
 769 #define p_pic p_dec->p_owner->p_vout->render.pp_picture[i_pic]
 770         /* Hack to make sure all the the pictures are freed by the decoder */
 771         for( i_pic = 0; i_pic < p_dec->p_owner->p_vout->render.i_pictures;
 772              i_pic++ )
 773         {
 774             if( p_pic->i_status == RESERVED_PICTURE )
 775                 vout_DestroyPicture( p_dec->p_owner->p_vout, p_pic );
 776             if( p_pic->i_refcount > 0 )
 777                 vout_UnlinkPicture( p_dec->p_owner->p_vout, p_pic );
 778         }
 779 #undef p_pic
 780
 781         /* We are about to die. Reattach video output to p_vlc. */
 782         vout_Request( p_dec, p_dec->p_owner->p_vout, 0 );
 783     }
 784
 785     if( p_dec->p_owner->p_sout_input )
 786     {
 787         sout_InputDelete( p_dec->p_owner->p_sout_input );
 788         es_format_Clean( &p_dec->p_owner->sout );
 789     }
 790
 791     if( p_dec->fmt_in.i_cat == SPU_ES )
 792     {
 793         vout_thread_t *p_vout;
 794
 795         p_vout = vlc_object_find( p_dec, VLC_OBJECT_VOUT, FIND_ANYWHERE );
 796         if( p_vout )
 797         {
 798             spu_Control( p_vout->p_spu, SPU_CHANNEL_CLEAR,
 799                          p_dec->p_owner->i_spu_channel );
 800             vlc_object_release( p_vout );
 801         }
 802     }
 803
 804     es_format_Clean( &p_dec->fmt_in );
 805     es_format_Clean( &p_dec->fmt_out );
 806
 807     if( p_dec->p_owner->p_packetizer )
 808     {
 809         module_Unneed( p_dec->p_owner->p_packetizer,
 810                        p_dec->p_owner->p_packetizer->p_module );
 811         es_format_Clean( &p_dec->p_owner->p_packetizer->fmt_in );
 812         es_format_Clean( &p_dec->p_owner->p_packetizer->fmt_out );
 813         vlc_object_detach( p_dec->p_owner->p_packetizer );
 814         vlc_object_destroy( p_dec->p_owner->p_packetizer );
 815     }
 816
 817     vlc_object_detach( p_dec );
 818
 819     free( p_dec->p_owner );
 820 }
 821
 822 /*****************************************************************************
 823  * Buffers allocation callbacks for the decoders
 824  *****************************************************************************/
 825 static aout_buffer_t *aout_new_buffer( decoder_t *p_dec, int i_samples )
 826 {
 827     decoder_owner_sys_t *p_sys = (decoder_owner_sys_t *)p_dec->p_owner;
 828     aout_buffer_t *p_buffer;
 829
 830     if( p_sys->p_aout_input != NULL &&
 831         ( p_dec->fmt_out.audio.i_rate != p_sys->audio.i_rate ||
 832           p_dec->fmt_out.audio.i_original_channels !=
 833               p_sys->audio.i_original_channels ||
 834           p_dec->fmt_out.audio.i_bytes_per_frame !=
 835               p_sys->audio.i_bytes_per_frame ) )
 836     {
 837         /* Parameters changed, restart the aout */
 838         aout_DecDelete( p_sys->p_aout, p_sys->p_aout_input );
 839         p_sys->p_aout_input = NULL;
 840     }
 841
 842     if( p_sys->p_aout_input == NULL )
 843     {
 844         p_dec->fmt_out.audio.i_format = p_dec->fmt_out.i_codec;
 845         p_sys->audio = p_dec->fmt_out.audio;
 846         p_sys->p_aout_input =
 847             aout_DecNew( p_dec, &p_sys->p_aout, &p_sys->audio );
 848         if( p_sys->p_aout_input == NULL )
 849         {
 850             msg_Err( p_dec, "failed to create audio output" );
 851             p_dec->b_error = VLC_TRUE;
 852             return NULL;
 853         }
 854         p_dec->fmt_out.audio.i_bytes_per_frame =
 855             p_sys->audio.i_bytes_per_frame;
 856     }
 857
 858     p_buffer = aout_DecNewBuffer( p_sys->p_aout, p_sys->p_aout_input,
 859                                   i_samples );
 860
 861     return p_buffer;
 862 }
 863
 864 static void aout_del_buffer( decoder_t *p_dec, aout_buffer_t *p_buffer )
 865 {
 866     aout_DecDeleteBuffer( p_dec->p_owner->p_aout,
 867                           p_dec->p_owner->p_aout_input, p_buffer );
 868 }
 869
 870 static picture_t *vout_new_buffer( decoder_t *p_dec )
 871 {
 872     decoder_owner_sys_t *p_sys = (decoder_owner_sys_t *)p_dec->p_owner;
 873     picture_t *p_pic;
 874
 875     if( p_sys->p_vout == NULL ||
 876         p_dec->fmt_out.video.i_width != p_sys->video.i_width ||
 877         p_dec->fmt_out.video.i_height != p_sys->video.i_height ||
 878         p_dec->fmt_out.video.i_chroma != p_sys->video.i_chroma ||
 879         p_dec->fmt_out.video.i_aspect != p_sys->video.i_aspect )
 880     {
 881         if( !p_dec->fmt_out.video.i_width ||
 882             !p_dec->fmt_out.video.i_height )
 883         {
 884             /* Can't create a new vout without display size */
 885             return NULL;
 886         }
 887
 888         if( !p_dec->fmt_out.video.i_sar_num ||
 889             !p_dec->fmt_out.video.i_sar_den )
 890         {
 891             p_dec->fmt_out.video.i_sar_num =
 892               p_dec->fmt_out.video.i_aspect * p_dec->fmt_out.video.i_height;
 893
 894             p_dec->fmt_out.video.i_sar_den = VOUT_ASPECT_FACTOR *
 895               p_dec->fmt_out.video.i_width;
 896         }
 897
 898         vlc_reduce( &p_dec->fmt_out.video.i_sar_num,
 899                     &p_dec->fmt_out.video.i_sar_den,
 900                     p_dec->fmt_out.video.i_sar_num,
 901                     p_dec->fmt_out.video.i_sar_den, 0 );
 902
 903         if( !p_dec->fmt_out.video.i_visible_width ||
 904             !p_dec->fmt_out.video.i_visible_height )
 905         {
 906             p_dec->fmt_out.video.i_visible_width =
 907                 p_dec->fmt_out.video.i_width;
 908             p_dec->fmt_out.video.i_visible_height =
 909                 p_dec->fmt_out.video.i_height;
 910         }
 911
 912         p_dec->fmt_out.video.i_chroma = p_dec->fmt_out.i_codec;
 913         p_sys->video = p_dec->fmt_out.video;
 914
 915         p_sys->p_vout = vout_Request( p_dec, p_sys->p_vout,
 916                                       &p_dec->fmt_out.video );
 917         if( p_sys->p_vout == NULL )
 918         {
 919             msg_Err( p_dec, "failed to create video output" );
 920             p_dec->b_error = VLC_TRUE;
 921             return NULL;
 922         }
 923
 924         if( p_sys->video.i_rmask )
 925             p_sys->p_vout->render.i_rmask = p_sys->video.i_rmask;
 926         if( p_sys->video.i_gmask )
 927             p_sys->p_vout->render.i_gmask = p_sys->video.i_gmask;
 928         if( p_sys->video.i_bmask )
 929             p_sys->p_vout->render.i_bmask = p_sys->video.i_bmask;
 930     }
 931
 932     /* Get a new picture */
 933     while( !(p_pic = vout_CreatePicture( p_sys->p_vout, 0, 0, 0 ) ) )
 934     {
 935         int i_pic, i_ready_pic = 0;
 936
 937         if( p_dec->b_die || p_dec->b_error )
 938         {
 939             return NULL;
 940         }
 941
 942 #define p_pic p_dec->p_owner->p_vout->render.pp_picture[i_pic]
 943         /* Check the decoder doesn't leak pictures */
 944         for( i_pic = 0; i_pic < p_dec->p_owner->p_vout->render.i_pictures;
 945              i_pic++ )
 946         {
 947             if( p_pic->i_status == READY_PICTURE )
 948             {
 949                 if( i_ready_pic++ > 0 ) break;
 950                 else continue;
 951             }
 952
 953             if( p_pic->i_status != DISPLAYED_PICTURE &&
 954                 p_pic->i_status != RESERVED_PICTURE &&
 955                 p_pic->i_status != READY_PICTURE ) break;
 956
 957             if( !p_pic->i_refcount && p_pic->i_status != RESERVED_PICTURE )
 958                 break;
 959         }
 960         if( i_pic == p_dec->p_owner->p_vout->render.i_pictures )
 961         {
 962             msg_Err( p_dec, "decoder is leaking pictures, resetting the heap" );
 963
 964             /* Just free all the pictures */
 965             for( i_pic = 0; i_pic < p_dec->p_owner->p_vout->render.i_pictures;
 966                  i_pic++ )
 967             {
 968                 if( p_pic->i_status == RESERVED_PICTURE )
 969                     vout_DestroyPicture( p_dec->p_owner->p_vout, p_pic );
 970                 if( p_pic->i_refcount > 0 )
 971                 vout_UnlinkPicture( p_dec->p_owner->p_vout, p_pic );
 972             }
 973         }
 974 #undef p_pic
 975
 976         msleep( VOUT_OUTMEM_SLEEP );
 977     }
 978
 979     return p_pic;
 980 }
 981
 982 static void vout_del_buffer( decoder_t *p_dec, picture_t *p_pic )
 983 {
 984     vout_DestroyPicture( p_dec->p_owner->p_vout, p_pic );
 985 }
 986
 987 static void vout_link_picture( decoder_t *p_dec, picture_t *p_pic )
 988 {
 989     vout_LinkPicture( p_dec->p_owner->p_vout, p_pic );
 990 }
 991
 992 static void vout_unlink_picture( decoder_t *p_dec, picture_t *p_pic )
 993 {
 994     vout_UnlinkPicture( p_dec->p_owner->p_vout, p_pic );
 995 }
 996
 997 static subpicture_t *spu_new_buffer( decoder_t *p_dec )
 998 {
 999     decoder_owner_sys_t *p_sys = (decoder_owner_sys_t *)p_dec->p_owner;
1000     vout_thread_t *p_vout = NULL;
1001     subpicture_t *p_subpic;
1002     int i_attempts = 30;
1003
1004     while( i_attempts-- )
1005     {
1006         if( p_dec->b_die || p_dec->b_error ) break;
1007
1008         p_vout = vlc_object_find( p_dec, VLC_OBJECT_VOUT, FIND_ANYWHERE );
1009         if( p_vout ) break;
1010
1011         msleep( VOUT_DISPLAY_DELAY );
1012     }
1013
1014     if( !p_vout )
1015     {
1016         msg_Warn( p_dec, "no vout found, dropping subpicture" );
1017         return NULL;
1018     }
1019
1020     if( p_sys->p_spu_vout != p_vout )
1021     {
1022         spu_Control( p_vout->p_spu, SPU_CHANNEL_REGISTER,
1023                      &p_sys->i_spu_channel );
1024         p_sys->p_spu_vout = p_vout;
1025     }
1026
1027     p_subpic = spu_CreateSubpicture( p_vout->p_spu );
1028     if( p_subpic )
1029     {
1030         p_subpic->i_channel = p_sys->i_spu_channel;
1031     }
1032
1033     vlc_object_release( p_vout );
1034
1035     return p_subpic;
1036 }
1037
1038 static void spu_del_buffer( decoder_t *p_dec, subpicture_t *p_subpic )
1039 {
1040     decoder_owner_sys_t *p_sys = (decoder_owner_sys_t *)p_dec->p_owner;
1041     vout_thread_t *p_vout = NULL;
1042
1043     p_vout = vlc_object_find( p_dec, VLC_OBJECT_VOUT, FIND_ANYWHERE );
1044     if( !p_vout || p_sys->p_spu_vout != p_vout )
1045     {
1046         if( p_vout )
1047             vlc_object_release( p_vout );
1048         msg_Warn( p_dec, "no vout found, leaking subpicture" );
1049         return;
1050     }
1051
1052     spu_DestroySubpicture( p_vout->p_spu, p_subpic );
1053
1054     vlc_object_release( p_vout );
1055 }
1056