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