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

   1 /*****************************************************************************
   2  * decoder.c: Functions for the management of decoders
   3  *****************************************************************************
   4  * Copyright (C) 1999-2004 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Christophe Massiot <massiot@via.ecp.fr>
   8  *          Gildas Bazin <gbazin@videolan.org>
   9  *          Laurent Aimar <fenrir@via.ecp.fr>
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation; either version 2 of the License, or
  14  * (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program; if not, write to the Free Software
  23  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  24  *****************************************************************************/
  25
  26 /*****************************************************************************
  27  * Preamble
  28  *****************************************************************************/
  29 #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     stats_Create( p_dec, "decoded_audio", VLC_VAR_INTEGER, STATS_COUNTER );
 388     stats_Create( p_dec, "decoded_video", VLC_VAR_INTEGER, STATS_COUNTER );
 389     stats_Create( p_dec, "decoded_sub", VLC_VAR_INTEGER, STATS_COUNTER );
 390
 391     /* Initialize the decoder fifo */
 392     p_dec->p_module = NULL;
 393
 394
 395     es_format_Copy( &p_dec->fmt_in, fmt );
 396     es_format_Copy( &p_dec->fmt_out, &null_es_format );
 397
 398     /* Allocate our private structure for the decoder */
 399     p_dec->p_owner = malloc( sizeof( decoder_owner_sys_t ) );
 400     if( p_dec->p_owner == NULL )
 401     {
 402         msg_Err( p_dec, "out of memory" );
 403         return NULL;
 404     }
 405     p_dec->p_owner->b_own_thread = VLC_TRUE;
 406     p_dec->p_owner->i_preroll_end = -1;
 407     p_dec->p_owner->p_input = p_input;
 408     p_dec->p_owner->p_aout = NULL;
 409     p_dec->p_owner->p_aout_input = NULL;
 410     p_dec->p_owner->p_vout = NULL;
 411     p_dec->p_owner->p_spu_vout = NULL;
 412     p_dec->p_owner->i_spu_channel = 0;
 413     p_dec->p_owner->p_sout = p_input->p_sout;
 414     p_dec->p_owner->p_sout_input = NULL;
 415     p_dec->p_owner->p_packetizer = NULL;
 416
 417     /* decoder fifo */
 418     if( ( p_dec->p_owner->p_fifo = block_FifoNew( p_dec ) ) == NULL )
 419     {
 420         msg_Err( p_dec, "out of memory" );
 421         return NULL;
 422     }
 423
 424     /* Set buffers allocation callbacks for the decoders */
 425     p_dec->pf_aout_buffer_new = aout_new_buffer;
 426     p_dec->pf_aout_buffer_del = aout_del_buffer;
 427     p_dec->pf_vout_buffer_new = vout_new_buffer;
 428     p_dec->pf_vout_buffer_del = vout_del_buffer;
 429     p_dec->pf_picture_link    = vout_link_picture;
 430     p_dec->pf_picture_unlink  = vout_unlink_picture;
 431     p_dec->pf_spu_buffer_new  = spu_new_buffer;
 432     p_dec->pf_spu_buffer_del  = spu_del_buffer;
 433
 434     vlc_object_attach( p_dec, p_input );
 435
 436     /* Find a suitable decoder/packetizer module */
 437     if( i_object_type == VLC_OBJECT_DECODER )
 438         p_dec->p_module = module_Need( p_dec, "decoder", "$codec", 0 );
 439     else
 440         p_dec->p_module = module_Need( p_dec, "packetizer", "$packetizer", 0 );
 441
 442     /* Check if decoder requires already packetized data */
 443     if( i_object_type == VLC_OBJECT_DECODER &&
 444         p_dec->b_need_packetized && !p_dec->fmt_in.b_packetized )
 445     {
 446         p_dec->p_owner->p_packetizer =
 447             vlc_object_create( p_input, VLC_OBJECT_PACKETIZER );
 448         if( p_dec->p_owner->p_packetizer )
 449         {
 450             es_format_Copy( &p_dec->p_owner->p_packetizer->fmt_in,
 451                             &p_dec->fmt_in );
 452
 453             es_format_Copy( &p_dec->p_owner->p_packetizer->fmt_out,
 454                             &null_es_format );
 455
 456             vlc_object_attach( p_dec->p_owner->p_packetizer, p_input );
 457
 458             p_dec->p_owner->p_packetizer->p_module =
 459                 module_Need( p_dec->p_owner->p_packetizer,
 460                              "packetizer", "$packetizer", 0 );
 461
 462             if( !p_dec->p_owner->p_packetizer->p_module )
 463             {
 464                 es_format_Clean( &p_dec->p_owner->p_packetizer->fmt_in );
 465                 vlc_object_detach( p_dec->p_owner->p_packetizer );
 466                 vlc_object_destroy( p_dec->p_owner->p_packetizer );
 467             }
 468         }
 469     }
 470
 471     return p_dec;
 472 }
 473
 474 /**
 475  * The decoding main loop
 476  *
 477  * \param p_dec the decoder
 478  * \return 0
 479  */
 480 static int DecoderThread( decoder_t * p_dec )
 481 {
 482     block_t *p_block;
 483
 484     /* The decoder's main loop */
 485     while( !p_dec->b_die && !p_dec->b_error )
 486     {
 487         if( ( p_block = block_FifoGet( p_dec->p_owner->p_fifo ) ) == NULL )
 488         {
 489             p_dec->b_error = 1;
 490             break;
 491         }
 492         if( DecoderDecode( p_dec, p_block ) != VLC_SUCCESS )
 493         {
 494             break;
 495         }
 496     }
 497
 498     while( !p_dec->b_die )
 499     {
 500         /* Trash all received PES packets */
 501         p_block = block_FifoGet( p_dec->p_owner->p_fifo );
 502         if( p_block ) block_Release( p_block );
 503     }
 504
 505     /* We do it here because of the dll loader that wants close() in the
 506      * same thread than open()/decode() */
 507     module_Unneed( p_dec, p_dec->p_module );
 508
 509     return 0;
 510 }
 511
 512 /**
 513  * Decode a block
 514  *
 515  * \param p_dec the decoder object
 516  * \param p_block the block to decode
 517  * \return VLC_SUCCESS or an error code
 518  */
 519 static int DecoderDecode( decoder_t *p_dec, block_t *p_block )
 520 {
 521     int i_rate = p_block ? p_block->i_rate : 1000;
 522
 523     if( p_block && p_block->i_buffer <= 0 )
 524     {
 525         block_Release( p_block );
 526         return VLC_SUCCESS;
 527     }
 528
 529     if( p_dec->i_object_type == VLC_OBJECT_PACKETIZER )
 530     {
 531         block_t *p_sout_block;
 532
 533         while( ( p_sout_block =
 534                      p_dec->pf_packetize( p_dec, p_block ? &p_block : 0 ) ) )
 535         {
 536             if( !p_dec->p_owner->p_sout_input )
 537             {
 538                 es_format_Copy( &p_dec->p_owner->sout, &p_dec->fmt_out );
 539
 540                 p_dec->p_owner->sout.i_group = p_dec->fmt_in.i_group;
 541                 p_dec->p_owner->sout.i_id = p_dec->fmt_in.i_id;
 542                 if( p_dec->fmt_in.psz_language )
 543                 {
 544                     if( p_dec->p_owner->sout.psz_language )
 545                         free( p_dec->p_owner->sout.psz_language );
 546                     p_dec->p_owner->sout.psz_language =
 547                         strdup( p_dec->fmt_in.psz_language );
 548                 }
 549
 550                 p_dec->p_owner->p_sout_input =
 551                     sout_InputNew( p_dec->p_owner->p_sout,
 552                                    &p_dec->p_owner->sout );
 553
 554                 if( p_dec->p_owner->p_sout_input == NULL )
 555                 {
 556                     msg_Err( p_dec, "cannot create packetizer output (%4.4s)",
 557                              (char *)&p_dec->p_owner->sout.i_codec );
 558                     p_dec->b_error = VLC_TRUE;
 559
 560                     while( p_sout_block )
 561                     {
 562                         block_t *p_next = p_sout_block->p_next;
 563                         block_Release( p_sout_block );
 564                         p_sout_block = p_next;
 565                     }
 566                     break;
 567                 }
 568             }
 569
 570             while( p_sout_block )
 571             {
 572                 block_t *p_next = p_sout_block->p_next;
 573
 574                 p_sout_block->p_next = NULL;
 575                 p_sout_block->i_rate = i_rate;
 576
 577                 sout_InputSendBuffer( p_dec->p_owner->p_sout_input,
 578                                       p_sout_block );
 579
 580                 p_sout_block = p_next;
 581             }
 582
 583             /* For now it's enough, as only sout inpact on this flag */
 584             if( p_dec->p_owner->p_sout->i_out_pace_nocontrol > 0 &&
 585                 p_dec->p_owner->p_input->b_out_pace_control )
 586             {
 587                 msg_Dbg( p_dec, "switching to synch mode" );
 588                 p_dec->p_owner->p_input->b_out_pace_control = VLC_FALSE;
 589             }
 590             else if( p_dec->p_owner->p_sout->i_out_pace_nocontrol <= 0 &&
 591                      !p_dec->p_owner->p_input->b_out_pace_control )
 592             {
 593                 msg_Dbg( p_dec, "switching to asynch mode" );
 594                 p_dec->p_owner->p_input->b_out_pace_control = VLC_TRUE;
 595             }
 596         }
 597     }
 598     else if( p_dec->fmt_in.i_cat == AUDIO_ES )
 599     {
 600         aout_buffer_t *p_aout_buf;
 601
 602         if( p_dec->p_owner->p_packetizer )
 603         {
 604             block_t *p_packetized_block;
 605             decoder_t *p_packetizer = p_dec->p_owner->p_packetizer;
 606
 607             while( (p_packetized_block =
 608                     p_packetizer->pf_packetize( p_packetizer, &p_block )) )
 609             {
 610                 if( p_packetizer->fmt_out.i_extra && !p_dec->fmt_in.i_extra )
 611                 {
 612                     p_dec->fmt_in.i_extra = p_packetizer->fmt_out.i_extra;
 613                     p_dec->fmt_in.p_extra = malloc( p_dec->fmt_in.i_extra );
 614                     memcpy( p_dec->fmt_in.p_extra,
 615                             p_packetizer->fmt_out.p_extra,
 616                             p_dec->fmt_in.i_extra );
 617                 }
 618
 619                 while( p_packetized_block )
 620                 {
 621                     block_t *p_next = p_packetized_block->p_next;
 622                     p_packetized_block->p_next = NULL;
 623                     p_packetized_block->i_rate = i_rate;
 624
 625                     while( (p_aout_buf = p_dec->pf_decode_audio( p_dec,
 626                                                        &p_packetized_block )) )
 627                     {
 628                         stats_UpdateInteger( p_dec, "decoded_audio", 1 );
 629                         /* FIXME the best would be to handle the case start_date < preroll < end_date
 630                          * but that's not easy with non raw audio stream */
 631                         if( p_dec->p_owner->i_preroll_end > 0 &&
 632                             p_aout_buf->start_date < p_dec->p_owner->i_preroll_end )
 633                         {
 634                             aout_DecDeleteBuffer( p_dec->p_owner->p_aout,
 635                                                   p_dec->p_owner->p_aout_input, p_aout_buf );
 636                         }
 637                         else
 638                         {
 639                             p_dec->p_owner->i_preroll_end = -1;
 640                             aout_DecPlay( p_dec->p_owner->p_aout,
 641                                           p_dec->p_owner->p_aout_input,
 642                                           p_aout_buf );
 643                         }
 644                     }
 645
 646                     p_packetized_block = p_next;
 647                 }
 648             }
 649         }
 650         else while( (p_aout_buf = p_dec->pf_decode_audio( p_dec, &p_block )) )
 651         {
 652             stats_UpdateInteger( p_dec, "decoded_audio", 1 );
 653             if( p_dec->p_owner->i_preroll_end > 0 &&
 654                 p_aout_buf->start_date < p_dec->p_owner->i_preroll_end )
 655             {
 656                 aout_DecDeleteBuffer( p_dec->p_owner->p_aout,
 657                                       p_dec->p_owner->p_aout_input, p_aout_buf );
 658             }
 659             else
 660             {
 661                 p_dec->p_owner->i_preroll_end = -1;
 662                 aout_DecPlay( p_dec->p_owner->p_aout,
 663                               p_dec->p_owner->p_aout_input,
 664                               p_aout_buf );
 665             }
 666         }
 667     }
 668     else if( p_dec->fmt_in.i_cat == VIDEO_ES )
 669     {
 670         picture_t *p_pic;
 671
 672         if( p_dec->p_owner->p_packetizer )
 673         {
 674             block_t *p_packetized_block;
 675             decoder_t *p_packetizer = p_dec->p_owner->p_packetizer;
 676
 677             while( (p_packetized_block =
 678                     p_packetizer->pf_packetize( p_packetizer, &p_block )) )
 679             {
 680                 if( p_packetizer->fmt_out.i_extra && !p_dec->fmt_in.i_extra )
 681                 {
 682                     p_dec->fmt_in.i_extra = p_packetizer->fmt_out.i_extra;
 683                     p_dec->fmt_in.p_extra = malloc( p_dec->fmt_in.i_extra );
 684                     memcpy( p_dec->fmt_in.p_extra,
 685                             p_packetizer->fmt_out.p_extra,
 686                             p_dec->fmt_in.i_extra );
 687                 }
 688
 689                 while( p_packetized_block )
 690                 {
 691                     block_t *p_next = p_packetized_block->p_next;
 692                     p_packetized_block->p_next = NULL;
 693                     p_packetized_block->i_rate = i_rate;
 694
 695                     while( (p_pic = p_dec->pf_decode_video( p_dec,
 696                                                        &p_packetized_block )) )
 697                     {
 698                         stats_UpdateInteger( p_dec, "decoded_video", 1 );
 699                         if( p_dec->p_owner->i_preroll_end > 0 &&
 700                             p_pic->date < p_dec->p_owner->i_preroll_end )
 701                         {
 702                             vout_DestroyPicture( p_dec->p_owner->p_vout, p_pic );
 703                         }
 704                         else
 705                         {
 706                             p_dec->p_owner->i_preroll_end = -1;
 707                             vout_DatePicture( p_dec->p_owner->p_vout, p_pic,
 708                                               p_pic->date );
 709                             vout_DisplayPicture( p_dec->p_owner->p_vout, p_pic );
 710                         }
 711                     }
 712
 713                     p_packetized_block = p_next;
 714                 }
 715             }
 716         }
 717         else while( (p_pic = p_dec->pf_decode_video( p_dec, &p_block )) )
 718         {
 719             stats_UpdateInteger( p_dec, "decoded_video", 1 );
 720             if( p_dec->p_owner->i_preroll_end > 0 &&
 721                 p_pic->date < p_dec->p_owner->i_preroll_end )
 722             {
 723                 vout_DestroyPicture( p_dec->p_owner->p_vout, p_pic );
 724             }
 725             else
 726             {
 727                 p_dec->p_owner->i_preroll_end = -1;
 728                 vout_DatePicture( p_dec->p_owner->p_vout, p_pic, p_pic->date );
 729                 vout_DisplayPicture( p_dec->p_owner->p_vout, p_pic );
 730             }
 731         }
 732     }
 733     else if( p_dec->fmt_in.i_cat == SPU_ES )
 734     {
 735         vout_thread_t *p_vout;
 736         subpicture_t *p_spu;
 737         while( (p_spu = p_dec->pf_decode_sub( p_dec, &p_block ) ) )
 738         {
 739             stats_UpdateInteger( p_dec, "decoded_sub", 1 );
 740             if( p_dec->p_owner->i_preroll_end > 0 &&
 741                 p_spu->i_start < p_dec->p_owner->i_preroll_end &&
 742                 ( p_spu->i_stop <= 0 || p_spu->i_stop <= p_dec->p_owner->i_preroll_end ) )
 743             {
 744                 spu_DestroySubpicture( p_dec->p_owner->p_vout->p_spu, p_spu );
 745                 continue;
 746             }
 747
 748             p_dec->p_owner->i_preroll_end = -1;
 749             p_vout = vlc_object_find( p_dec, VLC_OBJECT_VOUT, FIND_ANYWHERE );
 750             if( p_vout )
 751             {
 752                 spu_DisplaySubpicture( p_vout->p_spu, p_spu );
 753                 vlc_object_release( p_vout );
 754             }
 755         }
 756     }
 757     else
 758     {
 759         msg_Err( p_dec, "unknown ES format" );
 760         p_dec->b_error = 1;
 761     }
 762
 763     return p_dec->b_error ? VLC_EGENERIC : VLC_SUCCESS;
 764 }
 765
 766 /**
 767  * Destroys a decoder object
 768  *
 769  * \param p_dec the decoder object
 770  * \return nothing
 771  */
 772 static void DeleteDecoder( decoder_t * p_dec )
 773 {
 774     msg_Dbg( p_dec, "killing decoder fourcc `%4.4s', %d PES in FIFO",
 775              (char*)&p_dec->fmt_in.i_codec,
 776              p_dec->p_owner->p_fifo->i_depth );
 777
 778     /* Free all packets still in the decoder fifo. */
 779     block_FifoEmpty( p_dec->p_owner->p_fifo );
 780     block_FifoRelease( p_dec->p_owner->p_fifo );
 781
 782     /* Cleanup */
 783     if( p_dec->p_owner->p_aout_input )
 784         aout_DecDelete( p_dec->p_owner->p_aout, p_dec->p_owner->p_aout_input );
 785
 786     if( p_dec->p_owner->p_vout )
 787     {
 788         int i_pic;
 789
 790 #define p_pic p_dec->p_owner->p_vout->render.pp_picture[i_pic]
 791         /* Hack to make sure all the the pictures are freed by the decoder */
 792         for( i_pic = 0; i_pic < p_dec->p_owner->p_vout->render.i_pictures;
 793              i_pic++ )
 794         {
 795             if( p_pic->i_status == RESERVED_PICTURE )
 796                 vout_DestroyPicture( p_dec->p_owner->p_vout, p_pic );
 797             if( p_pic->i_refcount > 0 )
 798                 vout_UnlinkPicture( p_dec->p_owner->p_vout, p_pic );
 799         }
 800 #undef p_pic
 801
 802         /* We are about to die. Reattach video output to p_vlc. */
 803         vout_Request( p_dec, p_dec->p_owner->p_vout, 0 );
 804     }
 805
 806     if( p_dec->p_owner->p_sout_input )
 807     {
 808         sout_InputDelete( p_dec->p_owner->p_sout_input );
 809         es_format_Clean( &p_dec->p_owner->sout );
 810     }
 811
 812     if( p_dec->fmt_in.i_cat == SPU_ES )
 813     {
 814         vout_thread_t *p_vout;
 815
 816         p_vout = vlc_object_find( p_dec, VLC_OBJECT_VOUT, FIND_ANYWHERE );
 817         if( p_vout )
 818         {
 819             spu_Control( p_vout->p_spu, SPU_CHANNEL_CLEAR,
 820                          p_dec->p_owner->i_spu_channel );
 821             vlc_object_release( p_vout );
 822         }
 823     }
 824
 825     es_format_Clean( &p_dec->fmt_in );
 826     es_format_Clean( &p_dec->fmt_out );
 827
 828     if( p_dec->p_owner->p_packetizer )
 829     {
 830         module_Unneed( p_dec->p_owner->p_packetizer,
 831                        p_dec->p_owner->p_packetizer->p_module );
 832         es_format_Clean( &p_dec->p_owner->p_packetizer->fmt_in );
 833         es_format_Clean( &p_dec->p_owner->p_packetizer->fmt_out );
 834         vlc_object_detach( p_dec->p_owner->p_packetizer );
 835         vlc_object_destroy( p_dec->p_owner->p_packetizer );
 836     }
 837
 838     vlc_object_detach( p_dec );
 839
 840     free( p_dec->p_owner );
 841 }
 842
 843 /*****************************************************************************
 844  * Buffers allocation callbacks for the decoders
 845  *****************************************************************************/
 846 static aout_buffer_t *aout_new_buffer( decoder_t *p_dec, int i_samples )
 847 {
 848     decoder_owner_sys_t *p_sys = (decoder_owner_sys_t *)p_dec->p_owner;
 849     aout_buffer_t *p_buffer;
 850
 851     if( p_sys->p_aout_input != NULL &&
 852         ( p_dec->fmt_out.audio.i_rate != p_sys->audio.i_rate ||
 853           p_dec->fmt_out.audio.i_original_channels !=
 854               p_sys->audio.i_original_channels ||
 855           p_dec->fmt_out.audio.i_bytes_per_frame !=
 856               p_sys->audio.i_bytes_per_frame ) )
 857     {
 858         /* Parameters changed, restart the aout */
 859         aout_DecDelete( p_sys->p_aout, p_sys->p_aout_input );
 860         p_sys->p_aout_input = NULL;
 861     }
 862
 863     if( p_sys->p_aout_input == NULL )
 864     {
 865         audio_sample_format_t format;
 866         int i_force_dolby = config_GetInt( p_dec, "force-dolby-surround" );
 867
 868         p_dec->fmt_out.audio.i_format = p_dec->fmt_out.i_codec;
 869         p_sys->audio = p_dec->fmt_out.audio;
 870
 871         memcpy( &format, &p_sys->audio, sizeof( audio_sample_format_t ) );
 872         if ( i_force_dolby && (format.i_original_channels&AOUT_CHAN_PHYSMASK)
 873                                     == (AOUT_CHAN_LEFT|AOUT_CHAN_RIGHT) )
 874         {
 875             if ( i_force_dolby == 1 )
 876             {
 877                 format.i_original_channels = format.i_original_channels |
 878                                              AOUT_CHAN_DOLBYSTEREO;
 879             }
 880             else /* i_force_dolby == 2 */
 881             {
 882                 format.i_original_channels = format.i_original_channels &
 883                                              ~AOUT_CHAN_DOLBYSTEREO;
 884             }
 885         }
 886
 887         p_sys->p_aout_input =
 888             aout_DecNew( p_dec, &p_sys->p_aout, &format );
 889         if( p_sys->p_aout_input == NULL )
 890         {
 891             msg_Err( p_dec, "failed to create audio output" );
 892             p_dec->b_error = VLC_TRUE;
 893             return NULL;
 894         }
 895         p_dec->fmt_out.audio.i_bytes_per_frame =
 896             p_sys->audio.i_bytes_per_frame;
 897     }
 898
 899     p_buffer = aout_DecNewBuffer( p_sys->p_aout, p_sys->p_aout_input,
 900                                   i_samples );
 901
 902     return p_buffer;
 903 }
 904
 905 static void aout_del_buffer( decoder_t *p_dec, aout_buffer_t *p_buffer )
 906 {
 907     aout_DecDeleteBuffer( p_dec->p_owner->p_aout,
 908                           p_dec->p_owner->p_aout_input, p_buffer );
 909 }
 910
 911 static picture_t *vout_new_buffer( decoder_t *p_dec )
 912 {
 913     decoder_owner_sys_t *p_sys = (decoder_owner_sys_t *)p_dec->p_owner;
 914     picture_t *p_pic;
 915
 916     if( p_sys->p_vout == NULL ||
 917         p_dec->fmt_out.video.i_width != p_sys->video.i_width ||
 918         p_dec->fmt_out.video.i_height != p_sys->video.i_height ||
 919         p_dec->fmt_out.video.i_chroma != p_sys->video.i_chroma ||
 920         p_dec->fmt_out.video.i_aspect != p_sys->video.i_aspect )
 921     {
 922         if( !p_dec->fmt_out.video.i_width ||
 923             !p_dec->fmt_out.video.i_height )
 924         {
 925             /* Can't create a new vout without display size */
 926             return NULL;
 927         }
 928
 929         if( !p_dec->fmt_out.video.i_visible_width ||
 930             !p_dec->fmt_out.video.i_visible_height )
 931         {
 932             p_dec->fmt_out.video.i_visible_width =
 933                 p_dec->fmt_out.video.i_width;
 934             p_dec->fmt_out.video.i_visible_height =
 935                 p_dec->fmt_out.video.i_height;
 936         }
 937
 938         if( p_dec->fmt_out.video.i_visible_height == 1088 &&
 939             var_CreateGetBool( p_dec, "hdtv-fix" ) )
 940         {
 941             p_dec->fmt_out.video.i_visible_height = 1080;
 942             p_dec->fmt_out.video.i_sar_num *= 135;
 943             p_dec->fmt_out.video.i_sar_den *= 136;
 944             msg_Warn( p_dec, "Fixing broken HDTV stream (display_height=1088)");
 945         }
 946
 947         if( !p_dec->fmt_out.video.i_sar_num ||
 948             !p_dec->fmt_out.video.i_sar_den )
 949         {
 950             p_dec->fmt_out.video.i_sar_num = p_dec->fmt_out.video.i_aspect *
 951               p_dec->fmt_out.video.i_visible_height;
 952
 953             p_dec->fmt_out.video.i_sar_den = VOUT_ASPECT_FACTOR *
 954               p_dec->fmt_out.video.i_visible_width;
 955         }
 956
 957         vlc_ureduce( &p_dec->fmt_out.video.i_sar_num,
 958                      &p_dec->fmt_out.video.i_sar_den,
 959                      p_dec->fmt_out.video.i_sar_num,
 960                      p_dec->fmt_out.video.i_sar_den, 50000 );
 961
 962         p_dec->fmt_out.video.i_chroma = p_dec->fmt_out.i_codec;
 963         p_sys->video = p_dec->fmt_out.video;
 964
 965         p_sys->p_vout = vout_Request( p_dec, p_sys->p_vout,
 966                                       &p_dec->fmt_out.video );
 967         if( p_sys->p_vout == NULL )
 968         {
 969             msg_Err( p_dec, "failed to create video output" );
 970             p_dec->b_error = VLC_TRUE;
 971             return NULL;
 972         }
 973
 974         if( p_sys->video.i_rmask )
 975             p_sys->p_vout->render.i_rmask = p_sys->video.i_rmask;
 976         if( p_sys->video.i_gmask )
 977             p_sys->p_vout->render.i_gmask = p_sys->video.i_gmask;
 978         if( p_sys->video.i_bmask )
 979             p_sys->p_vout->render.i_bmask = p_sys->video.i_bmask;
 980     }
 981
 982     /* Get a new picture */
 983     while( !(p_pic = vout_CreatePicture( p_sys->p_vout, 0, 0, 0 ) ) )
 984     {
 985         int i_pic, i_ready_pic = 0;
 986
 987         if( p_dec->b_die || p_dec->b_error )
 988         {
 989             return NULL;
 990         }
 991
 992 #define p_pic p_dec->p_owner->p_vout->render.pp_picture[i_pic]
 993         /* Check the decoder doesn't leak pictures */
 994         for( i_pic = 0; i_pic < p_dec->p_owner->p_vout->render.i_pictures;
 995              i_pic++ )
 996         {
 997             if( p_pic->i_status == READY_PICTURE )
 998             {
 999                 if( i_ready_pic++ > 0 ) break;
1000                 else continue;
1001             }
1002
1003             if( p_pic->i_status != DISPLAYED_PICTURE &&
1004                 p_pic->i_status != RESERVED_PICTURE &&
1005                 p_pic->i_status != READY_PICTURE ) break;
1006
1007             if( !p_pic->i_refcount && p_pic->i_status != RESERVED_PICTURE )
1008                 break;
1009         }
1010         if( i_pic == p_dec->p_owner->p_vout->render.i_pictures )
1011         {
1012             msg_Err( p_dec, "decoder is leaking pictures, resetting the heap" );
1013
1014             /* Just free all the pictures */
1015             for( i_pic = 0; i_pic < p_dec->p_owner->p_vout->render.i_pictures;
1016                  i_pic++ )
1017             {
1018                 if( p_pic->i_status == RESERVED_PICTURE )
1019                     vout_DestroyPicture( p_dec->p_owner->p_vout, p_pic );
1020                 if( p_pic->i_refcount > 0 )
1021                 vout_UnlinkPicture( p_dec->p_owner->p_vout, p_pic );
1022             }
1023         }
1024 #undef p_pic
1025
1026         msleep( VOUT_OUTMEM_SLEEP );
1027     }
1028
1029     return p_pic;
1030 }
1031
1032 static void vout_del_buffer( decoder_t *p_dec, picture_t *p_pic )
1033 {
1034     vout_DestroyPicture( p_dec->p_owner->p_vout, p_pic );
1035 }
1036
1037 static void vout_link_picture( decoder_t *p_dec, picture_t *p_pic )
1038 {
1039     vout_LinkPicture( p_dec->p_owner->p_vout, p_pic );
1040 }
1041
1042 static void vout_unlink_picture( decoder_t *p_dec, picture_t *p_pic )
1043 {
1044     vout_UnlinkPicture( p_dec->p_owner->p_vout, p_pic );
1045 }
1046
1047 static subpicture_t *spu_new_buffer( decoder_t *p_dec )
1048 {
1049     decoder_owner_sys_t *p_sys = (decoder_owner_sys_t *)p_dec->p_owner;
1050     vout_thread_t *p_vout = NULL;
1051     subpicture_t *p_subpic;
1052     int i_attempts = 30;
1053
1054     while( i_attempts-- )
1055     {
1056         if( p_dec->b_die || p_dec->b_error ) break;
1057
1058         p_vout = vlc_object_find( p_dec, VLC_OBJECT_VOUT, FIND_ANYWHERE );
1059         if( p_vout ) break;
1060
1061         msleep( VOUT_DISPLAY_DELAY );
1062     }
1063
1064     if( !p_vout )
1065     {
1066         msg_Warn( p_dec, "no vout found, dropping subpicture" );
1067         return NULL;
1068     }
1069
1070     if( p_sys->p_spu_vout != p_vout )
1071     {
1072         spu_Control( p_vout->p_spu, SPU_CHANNEL_REGISTER,
1073                      &p_sys->i_spu_channel );
1074         p_sys->p_spu_vout = p_vout;
1075     }
1076
1077     p_subpic = spu_CreateSubpicture( p_vout->p_spu );
1078     if( p_subpic )
1079     {
1080         p_subpic->i_channel = p_sys->i_spu_channel;
1081     }
1082
1083     vlc_object_release( p_vout );
1084
1085     return p_subpic;
1086 }
1087
1088 static void spu_del_buffer( decoder_t *p_dec, subpicture_t *p_subpic )
1089 {
1090     decoder_owner_sys_t *p_sys = (decoder_owner_sys_t *)p_dec->p_owner;
1091     vout_thread_t *p_vout = NULL;
1092
1093     p_vout = vlc_object_find( p_dec, VLC_OBJECT_VOUT, FIND_ANYWHERE );
1094     if( !p_vout || p_sys->p_spu_vout != p_vout )
1095     {
1096         if( p_vout )
1097             vlc_object_release( p_vout );
1098         msg_Warn( p_dec, "no vout found, leaking subpicture" );
1099         return;
1100     }
1101
1102     spu_DestroySubpicture( p_vout->p_spu, p_subpic );
1103
1104     vlc_object_release( p_vout );
1105 }
1106