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

   1 /*****************************************************************************
   2  * input_dec.c: Functions for the management of decoders
   3  *****************************************************************************
   4  * Copyright (C) 1999-2004 VideoLAN
   5  * $Id$
   6  *
   7  * Authors: Christophe Massiot <massiot@via.ecp.fr>
   8  *          Gildas Bazin <gbazin@netcourrier.com>
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
  23  *****************************************************************************/
  24
  25 /*****************************************************************************
  26  * Preamble
  27  *****************************************************************************/
  28 #include <stdlib.h>
  29 #include <string.h>                                    /* memcpy(), memset() */
  30
  31 #include <vlc/vlc.h>
  32 #include <vlc/decoder.h>
  33 #include <vlc/vout.h>
  34
  35 #include "stream_output.h"
  36
  37 #include "input_ext-intf.h"
  38 #include "input_ext-plugins.h"
  39
  40 #include "codecs.h"
  41
  42 static void input_NullPacket( input_thread_t *, es_descriptor_t * );
  43
  44 static decoder_t * CreateDecoder( input_thread_t *, es_descriptor_t *, int );
  45 static int         DecoderThread( decoder_t * );
  46 static int         DecoderDecode( decoder_t * p_dec, block_t *p_block );
  47 static void        DeleteDecoder( decoder_t * );
  48
  49 /* Buffers allocation callbacks for the decoders */
  50 static aout_buffer_t *aout_new_buffer( decoder_t *, int );
  51 static void aout_del_buffer( decoder_t *, aout_buffer_t * );
  52
  53 static picture_t *vout_new_buffer( decoder_t * );
  54 static void vout_del_buffer( decoder_t *, picture_t * );
  55 static void vout_link_picture( decoder_t *, picture_t * );
  56 static void vout_unlink_picture( decoder_t *, picture_t * );
  57
  58 static es_format_t null_es_format = {0};
  59
  60 struct decoder_owner_sys_t
  61 {
  62     vlc_bool_t      b_own_thread;
  63
  64     input_thread_t  *p_input;
  65
  66     aout_instance_t *p_aout;
  67     aout_input_t    *p_aout_input;
  68
  69     vout_thread_t   *p_vout;
  70
  71     sout_instance_t         *p_sout;
  72     sout_packetizer_input_t *p_sout_input;
  73
  74     /* Some decoders require already packetized data (ie. not truncated) */
  75     decoder_t *p_packetizer;
  76
  77     /* Current format in use by the output */
  78     video_format_t video;
  79     audio_format_t audio;
  80     es_format_t    sout;
  81
  82     /* fifo */
  83     block_fifo_t *p_fifo;
  84
  85     /* */
  86     input_buffers_t *p_method_data;
  87     es_descriptor_t *p_es_descriptor;
  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_RunDecoder( input_thread_t * p_input, es_descriptor_t * p_es )
  99 {
 100     decoder_t   *p_dec = NULL;
 101     vlc_value_t val;
 102
 103     /* If we are in sout mode, search for packetizer module */
 104     if( !p_es->b_force_decoder && p_input->stream.p_sout )
 105     {
 106         /* Create the decoder configuration structure */
 107         p_dec = CreateDecoder( p_input, p_es, VLC_OBJECT_PACKETIZER );
 108         if( p_dec == NULL )
 109         {
 110             msg_Err( p_input, "could not create packetizer" );
 111             return NULL;
 112         }
 113     }
 114     else
 115     {
 116         /* Create the decoder configuration structure */
 117         p_dec = CreateDecoder( p_input, p_es, VLC_OBJECT_DECODER );
 118         if( p_dec == NULL )
 119         {
 120             msg_Err( p_input, "could not create decoder" );
 121             return NULL;
 122         }
 123     }
 124
 125     if( !p_dec->p_module )
 126     {
 127         msg_Err( p_dec, "no suitable decoder module for fourcc `%4.4s'.\n"
 128                  "VLC probably does not support this sound or video format.",
 129                  (char*)&p_dec->fmt_in.i_codec );
 130
 131         DeleteDecoder( p_dec );
 132         vlc_object_destroy( p_dec );
 133         return NULL;
 134     }
 135
 136     if( !p_es->b_force_decoder && p_input->stream.p_sout && p_input->stream.b_pace_control )
 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 ( p_es->i_cat == AUDIO_ES )
 151         {
 152             i_priority = VLC_THREAD_PRIORITY_AUDIO;
 153         }
 154         else
 155         {
 156             i_priority = VLC_THREAD_PRIORITY_VIDEO;
 157         }
 158
 159         /* Spawn the decoder thread */
 160         if( vlc_thread_create( p_dec, "decoder", DecoderThread,
 161                                i_priority, VLC_FALSE ) )
 162         {
 163             msg_Err( p_dec, "cannot spawn decoder thread \"%s\"",
 164                              p_dec->p_module->psz_object_name );
 165             module_Unneed( p_dec, p_dec->p_module );
 166             DeleteDecoder( p_dec );
 167             vlc_object_destroy( p_dec );
 168             return NULL;
 169         }
 170     }
 171
 172     /* Select a new ES */
 173     INSERT_ELEM( p_input->stream.pp_selected_es,
 174                  p_input->stream.i_selected_es_number,
 175                  p_input->stream.i_selected_es_number,
 176                  p_es );
 177
 178     p_input->stream.b_changed = 1;
 179
 180     return p_dec;
 181 }
 182
 183 /**
 184  * Kills a decoder thread and waits until it's finished
 185  *
 186  * \param p_input the input thread
 187  * \param p_es the es descriptor
 188  * \return nothing
 189  */
 190 void input_EndDecoder( input_thread_t * p_input, es_descriptor_t * p_es )
 191 {
 192     decoder_t *p_dec = p_es->p_dec;
 193
 194     p_dec->b_die = VLC_TRUE;
 195
 196     if( p_dec->p_owner->b_own_thread )
 197     {
 198         /* Make sure the thread leaves the function by
 199          * sending it an empty block. */
 200         block_t *p_block = block_New( p_dec, 0 );
 201         input_DecodeBlock( p_dec, p_block );
 202
 203         vlc_thread_join( p_dec );
 204
 205         /* Don't module_Unneed() here because of the dll loader that wants
 206          * close() in the same thread than open()/decode() */
 207     }
 208     else
 209     {
 210         module_Unneed( p_dec, p_dec->p_module );
 211     }
 212
 213     /* Delete decoder configuration */
 214     DeleteDecoder( p_dec );
 215
 216     /* Delete the decoder */
 217     vlc_object_destroy( p_dec );
 218
 219     /* Tell the input there is no more decoder */
 220     p_es->p_dec = NULL;
 221
 222     p_input->stream.b_changed = 1;
 223 }
 224
 225 /**
 226  * Put a PES in the decoder's fifo.
 227  *
 228  * \param p_dec the decoder object
 229  * \param p_pes the pes packet
 230  * \return nothing
 231  */
 232 void input_DecodePES( decoder_t * p_dec, pes_packet_t * p_pes )
 233 {
 234     data_packet_t *p_data;
 235     int     i_size = 0;
 236
 237     for( p_data = p_pes->p_first; p_data != NULL; p_data = p_data->p_next )
 238     {
 239         i_size += p_data->p_payload_end - p_data->p_payload_start;
 240     }
 241     if( i_size > 0 )
 242     {
 243         block_t *p_block = block_New( p_dec, i_size );
 244         if( p_block )
 245         {
 246             uint8_t *p_buffer = p_block->p_buffer;
 247
 248             for( p_data = p_pes->p_first; p_data; p_data = p_data->p_next )
 249             {
 250                 int i_copy = p_data->p_payload_end - p_data->p_payload_start;
 251
 252                 memcpy( p_buffer, p_data->p_payload_start, i_copy );
 253
 254                 p_buffer += i_copy;
 255             }
 256             p_block->i_pts = p_pes->i_pts;
 257             p_block->i_dts = p_pes->i_dts;
 258             if( p_pes->b_discontinuity )
 259                 p_block->i_flags |= BLOCK_FLAG_DISCONTINUITY;
 260             p_block->i_rate = p_pes->i_rate;
 261
 262             input_DecodeBlock( p_dec, p_block );
 263         }
 264     }
 265
 266     input_DeletePES( p_dec->p_owner->p_method_data, p_pes );
 267 }
 268
 269 /**
 270  * Put a block_t in the decoder's fifo.
 271  *
 272  * \param p_dec the decoder object
 273  * \param p_block the data block
 274  */
 275 void input_DecodeBlock( decoder_t * p_dec, block_t *p_block )
 276 {
 277     if( p_dec->p_owner->b_own_thread )
 278     {
 279         block_FifoPut( p_dec->p_owner->p_fifo, p_block );
 280
 281         if( p_dec->p_owner->p_input->b_out_pace_control )
 282         {
 283             /* FIXME !!!!! */
 284             while( !p_dec->b_die && !p_dec->b_error &&
 285                    p_dec->p_owner->p_fifo->i_depth > 10 )
 286             {
 287                 msleep( 1000 );
 288             }
 289         }
 290     }
 291     else
 292     {
 293         if( p_dec->b_error || p_block->i_buffer <= 0 )
 294         {
 295             block_Release( p_block );
 296         }
 297         else
 298         {
 299             DecoderDecode( p_dec, p_block );
 300         }
 301     }
 302 }
 303
 304 /**
 305  * Create a NULL packet for padding in case of a data loss
 306  *
 307  * \param p_input the input thread
 308  * \param p_es es descriptor
 309  * \return nothing
 310  */
 311 static void input_NullPacket( input_thread_t * p_input,
 312                               es_descriptor_t * p_es )
 313 {
 314     block_t *p_block = block_New( p_input, PADDING_PACKET_SIZE );
 315     if( p_block )
 316     {
 317         memset( p_block->p_buffer, 0, PADDING_PACKET_SIZE );
 318         p_block->i_flags |= BLOCK_FLAG_DISCONTINUITY;
 319
 320         block_FifoPut( p_es->p_dec->p_owner->p_fifo, p_block );
 321     }
 322 }
 323
 324 /**
 325  * Send a NULL packet to the decoders
 326  *
 327  * \param p_input the input thread
 328  * \return nothing
 329  */
 330 void input_EscapeDiscontinuity( input_thread_t * p_input )
 331 {
 332     unsigned int i_es, i;
 333
 334     for( i_es = 0; i_es < p_input->stream.i_selected_es_number; i_es++ )
 335     {
 336         es_descriptor_t * p_es = p_input->stream.pp_selected_es[i_es];
 337
 338         if( p_es->p_dec != NULL )
 339         {
 340             for( i = 0; i < PADDING_PACKET_NUMBER; i++ )
 341             {
 342                 input_NullPacket( p_input, p_es );
 343             }
 344         }
 345     }
 346 }
 347
 348 /**
 349  * Send a NULL packet to the audio decoders
 350  *
 351  * \param p_input the input thread
 352  * \return nothing
 353  */
 354 void input_EscapeAudioDiscontinuity( input_thread_t * p_input )
 355 {
 356     unsigned int i_es, i;
 357
 358     for( i_es = 0; i_es < p_input->stream.i_selected_es_number; i_es++ )
 359     {
 360         es_descriptor_t * p_es = p_input->stream.pp_selected_es[i_es];
 361
 362         if( p_es->p_dec != NULL && p_es->i_cat == AUDIO_ES )
 363         {
 364             for( i = 0; i < PADDING_PACKET_NUMBER; i++ )
 365             {
 366                 input_NullPacket( p_input, p_es );
 367             }
 368         }
 369     }
 370 }
 371
 372 /**
 373  * Create a decoder object
 374  *
 375  * \param p_input the input thread
 376  * \param p_es the es descriptor
 377  * \param i_object_type Object type as define in include/vlc_objects.h
 378  * \return the decoder object
 379  */
 380 static decoder_t * CreateDecoder( input_thread_t * p_input,
 381                                   es_descriptor_t * p_es, int i_object_type )
 382 {
 383     decoder_t *p_dec;
 384
 385     p_dec = vlc_object_create( p_input, i_object_type );
 386     if( p_dec == NULL )
 387     {
 388         msg_Err( p_input, "out of memory" );
 389         return NULL;
 390     }
 391
 392     p_dec->pf_decode_audio = 0;
 393     p_dec->pf_decode_video = 0;
 394     p_dec->pf_decode_sub = 0;
 395     p_dec->pf_packetize = 0;
 396
 397     /* Initialize the decoder fifo */
 398     p_dec->p_module = NULL;
 399
 400     es_format_Copy( &p_dec->fmt_in, &p_es->fmt );
 401
 402     if( p_es->p_waveformatex )
 403     {
 404 #define p_wf ((WAVEFORMATEX *)p_es->p_waveformatex)
 405         p_dec->fmt_in.audio.i_channels = p_wf->nChannels;
 406         p_dec->fmt_in.audio.i_rate = p_wf->nSamplesPerSec;
 407         p_dec->fmt_in.i_bitrate = p_wf->nAvgBytesPerSec * 8;
 408         p_dec->fmt_in.audio.i_blockalign = p_wf->nBlockAlign;
 409         p_dec->fmt_in.audio.i_bitspersample = p_wf->wBitsPerSample;
 410         p_dec->fmt_in.i_extra = p_wf->cbSize;
 411         p_dec->fmt_in.p_extra = NULL;
 412         if( p_wf->cbSize )
 413         {
 414             p_dec->fmt_in.p_extra = malloc( p_wf->cbSize );
 415             memcpy( p_dec->fmt_in.p_extra, &p_wf[1], p_wf->cbSize );
 416         }
 417     }
 418
 419     if( p_es->p_bitmapinfoheader )
 420     {
 421 #define p_bih ((BITMAPINFOHEADER *) p_es->p_bitmapinfoheader)
 422         p_dec->fmt_in.i_extra = p_bih->biSize - sizeof(BITMAPINFOHEADER);
 423         p_dec->fmt_in.p_extra = NULL;
 424         if( p_dec->fmt_in.i_extra )
 425         {
 426             p_dec->fmt_in.p_extra = malloc( p_dec->fmt_in.i_extra );
 427             memcpy( p_dec->fmt_in.p_extra, &p_bih[1], p_dec->fmt_in.i_extra );
 428         }
 429
 430         p_dec->fmt_in.video.i_width = p_bih->biWidth;
 431         p_dec->fmt_in.video.i_height = p_bih->biHeight;
 432     }
 433
 434     /* FIXME
 435      *  - 1: beurk
 436      *  - 2: I'm not sure there isn't any endian problem here (spu)... */
 437     if( p_es->i_cat == SPU_ES && p_es->p_demux_data )
 438     {
 439         if( ( p_es->i_fourcc == VLC_FOURCC( 's', 'p', 'u', ' ' ) ||
 440               p_es->i_fourcc == VLC_FOURCC( 's', 'p', 'u', 'b' ) ) &&
 441             *((uint32_t*)p_es->p_demux_data) == 0xBeef )
 442         {
 443             memcpy( p_dec->fmt_in.subs.spu.palette,
 444                     p_es->p_demux_data, 17 * 4 );
 445         }
 446         else if( p_es->i_fourcc == VLC_FOURCC( 'd', 'v', 'b', 's' ) )
 447         {
 448             dvb_spuinfo_t *p_dvbs = (dvb_spuinfo_t*)p_es->p_demux_data;
 449
 450             p_dec->fmt_in.subs.dvb.i_id = p_dvbs->i_id;
 451         }
 452     }
 453
 454     p_dec->fmt_in.i_cat = p_es->i_cat;
 455     p_dec->fmt_in.i_codec = p_es->i_fourcc;
 456
 457     p_dec->fmt_out = null_es_format;
 458
 459     /* Allocate our private structure for the decoder */
 460     p_dec->p_owner = (decoder_owner_sys_t*)malloc(sizeof(decoder_owner_sys_t));
 461     if( p_dec->p_owner == NULL )
 462     {
 463         msg_Err( p_dec, "out of memory" );
 464         return NULL;
 465     }
 466     p_dec->p_owner->b_own_thread = VLC_TRUE;
 467     p_dec->p_owner->p_input = p_input;
 468     p_dec->p_owner->p_aout = NULL;
 469     p_dec->p_owner->p_aout_input = NULL;
 470     p_dec->p_owner->p_vout = NULL;
 471     p_dec->p_owner->p_sout = p_input->stream.p_sout;
 472     p_dec->p_owner->p_sout_input = NULL;
 473     p_dec->p_owner->p_packetizer = NULL;
 474     p_dec->p_owner->p_es_descriptor = p_es;
 475
 476
 477     /* decoder fifo */
 478     if( ( p_dec->p_owner->p_fifo = block_FifoNew( p_dec ) ) == NULL )
 479     {
 480         msg_Err( p_dec, "out of memory" );
 481         return NULL;
 482     }
 483     p_dec->p_owner->p_method_data = p_input->p_method_data;
 484
 485     /* Set buffers allocation callbacks for the decoders */
 486     p_dec->pf_aout_buffer_new = aout_new_buffer;
 487     p_dec->pf_aout_buffer_del = aout_del_buffer;
 488     p_dec->pf_vout_buffer_new = vout_new_buffer;
 489     p_dec->pf_vout_buffer_del = vout_del_buffer;
 490     p_dec->pf_picture_link    = vout_link_picture;
 491     p_dec->pf_picture_unlink  = vout_unlink_picture;
 492
 493     vlc_object_attach( p_dec, p_input );
 494
 495     /* Find a suitable decoder/packetizer module */
 496     if( i_object_type == VLC_OBJECT_DECODER )
 497         p_dec->p_module = module_Need( p_dec, "decoder", "$codec", 0 );
 498     else
 499         p_dec->p_module = module_Need( p_dec, "packetizer", "$packetizer", 0 );
 500
 501     /* Check if decoder requires already packetized data */
 502     if( i_object_type == VLC_OBJECT_DECODER &&
 503         p_dec->b_need_packetized && !p_dec->fmt_in.b_packetized )
 504     {
 505         p_dec->p_owner->p_packetizer =
 506             vlc_object_create( p_input, VLC_OBJECT_PACKETIZER );
 507         if( p_dec->p_owner->p_packetizer )
 508         {
 509             p_dec->p_owner->p_packetizer->fmt_in = null_es_format;
 510             p_dec->p_owner->p_packetizer->fmt_out = null_es_format;
 511             es_format_Copy( &p_dec->p_owner->p_packetizer->fmt_in,
 512                             &p_dec->fmt_in );
 513
 514             vlc_object_attach( p_dec->p_owner->p_packetizer, p_input );
 515
 516             p_dec->p_owner->p_packetizer->p_module =
 517                 module_Need( p_dec->p_owner->p_packetizer,
 518                              "packetizer", "$packetizer", 0 );
 519
 520             if( !p_dec->p_owner->p_packetizer->p_module )
 521             {
 522                 es_format_Clean( &p_dec->p_owner->p_packetizer->fmt_in );
 523                 vlc_object_detach( p_dec->p_owner->p_packetizer );
 524                 vlc_object_destroy( p_dec->p_owner->p_packetizer );
 525             }
 526         }
 527     }
 528
 529     return p_dec;
 530 }
 531
 532 /**
 533  * The decoding main loop
 534  *
 535  * \param p_dec the decoder
 536  * \return 0
 537  */
 538 static int DecoderThread( decoder_t * p_dec )
 539 {
 540     block_t *p_block;
 541
 542     /* The decoder's main loop */
 543     while( !p_dec->b_die && !p_dec->b_error )
 544     {
 545         if( ( p_block = block_FifoGet( p_dec->p_owner->p_fifo ) ) == NULL )
 546         {
 547             p_dec->b_error = 1;
 548             break;
 549         }
 550         if( DecoderDecode( p_dec, p_block ) != VLC_SUCCESS )
 551         {
 552             break;
 553         }
 554     }
 555
 556     while( !p_dec->b_die )
 557     {
 558         /* Trash all received PES packets */
 559         p_block = block_FifoGet( p_dec->p_owner->p_fifo );
 560         if( p_block ) block_Release( p_block );
 561     }
 562
 563     /* We do it here because of the dll loader that wants close() in the
 564      * same thread than open()/decode() */
 565     module_Unneed( p_dec, p_dec->p_module );
 566
 567     return 0;
 568 }
 569
 570 /**
 571  * Decode a block
 572  *
 573  * \param p_dec the decoder object
 574  * \param p_block the block to decode
 575  * \return VLC_SUCCESS or an error code
 576  */
 577 static int DecoderDecode( decoder_t *p_dec, block_t *p_block )
 578 {
 579     if( p_block->i_buffer <= 0 )
 580     {
 581         block_Release( p_block );
 582         return VLC_SUCCESS;
 583     }
 584
 585     if( p_dec->i_object_type == VLC_OBJECT_PACKETIZER )
 586     {
 587         block_t *p_sout_block;
 588
 589         while( (p_sout_block = p_dec->pf_packetize( p_dec, &p_block )) )
 590         {
 591             if( !p_dec->p_owner->p_sout_input )
 592             {
 593                 es_format_Copy( &p_dec->p_owner->sout, &p_dec->fmt_out );
 594                 if( p_dec->p_owner->p_es_descriptor->p_pgrm )
 595                 {
 596                     p_dec->p_owner->sout.i_group =
 597                         p_dec->p_owner->p_es_descriptor->p_pgrm->i_number;
 598                 }
 599                 p_dec->p_owner->sout.i_id =
 600                     p_dec->p_owner->p_es_descriptor->i_id - 1;
 601                 if( p_dec->fmt_in.psz_language )
 602                 {
 603                     p_dec->p_owner->sout.psz_language =
 604                         strdup( p_dec->fmt_in.psz_language );
 605                 }
 606
 607                 p_dec->p_owner->p_sout_input =
 608                     sout_InputNew( p_dec->p_owner->p_sout,
 609                                    &p_dec->p_owner->sout );
 610
 611                 if( p_dec->p_owner->p_sout_input == NULL )
 612                 {
 613                     msg_Err( p_dec, "cannot create packetizer output" );
 614                     p_dec->b_error = VLC_TRUE;
 615
 616                     while( p_sout_block )
 617                     {
 618                         block_t *p_next = p_sout_block->p_next;
 619                         block_Release( p_sout_block );
 620                         p_sout_block = p_next;
 621                     }
 622                     break;
 623                 }
 624             }
 625
 626             while( p_sout_block )
 627             {
 628                 block_t       *p_next = p_sout_block->p_next;
 629
 630                 p_sout_block->p_next = NULL;
 631
 632                 sout_InputSendBuffer( p_dec->p_owner->p_sout_input,
 633                                       p_sout_block );
 634
 635                 p_sout_block = p_next;
 636             }
 637
 638             /* For now it's enough, as only sout inpact on this flag */
 639             if( p_dec->p_owner->p_sout->i_out_pace_nocontrol > 0 &&
 640                 p_dec->p_owner->p_input->b_out_pace_control )
 641             {
 642                 msg_Dbg( p_dec, "switching to synch mode" );
 643                 p_dec->p_owner->p_input->b_out_pace_control = VLC_FALSE;
 644             }
 645             else if( p_dec->p_owner->p_sout->i_out_pace_nocontrol <= 0 &&
 646                      !p_dec->p_owner->p_input->b_out_pace_control )
 647             {
 648                 msg_Dbg( p_dec, "switching to asynch mode" );
 649                 p_dec->p_owner->p_input->b_out_pace_control = VLC_TRUE;
 650             }
 651         }
 652     }
 653     else if( p_dec->fmt_in.i_cat == AUDIO_ES )
 654     {
 655         aout_buffer_t *p_aout_buf;
 656
 657         if( p_dec->p_owner->p_packetizer )
 658         {
 659             block_t *p_packetized_block;
 660             decoder_t *p_packetizer = p_dec->p_owner->p_packetizer;
 661
 662             while( (p_packetized_block =
 663                     p_packetizer->pf_packetize( p_packetizer, &p_block )) )
 664             {
 665                 while( (p_aout_buf =
 666                         p_dec->pf_decode_audio( p_dec, &p_packetized_block )) )
 667                 {
 668                     aout_DecPlay( p_dec->p_owner->p_aout,
 669                                   p_dec->p_owner->p_aout_input, p_aout_buf );
 670                 }
 671             }
 672         }
 673         else while( (p_aout_buf = p_dec->pf_decode_audio( p_dec, &p_block )) )
 674         {
 675             aout_DecPlay( p_dec->p_owner->p_aout,
 676                           p_dec->p_owner->p_aout_input, p_aout_buf );
 677         }
 678     }
 679     else if( p_dec->fmt_in.i_cat == VIDEO_ES )
 680     {
 681         picture_t *p_pic;
 682
 683         if( p_dec->p_owner->p_packetizer )
 684         {
 685             block_t *p_packetized_block;
 686             decoder_t *p_packetizer = p_dec->p_owner->p_packetizer;
 687
 688             while( (p_packetized_block =
 689                     p_packetizer->pf_packetize( p_packetizer, &p_block )) )
 690             {
 691                 while( (p_pic =
 692                         p_dec->pf_decode_video( p_dec, &p_packetized_block )) )
 693                 {
 694                     vout_DatePicture( p_dec->p_owner->p_vout, p_pic,
 695                                       p_pic->date );
 696                     vout_DisplayPicture( p_dec->p_owner->p_vout, p_pic );
 697                 }
 698             }
 699         }
 700         else while( (p_pic = p_dec->pf_decode_video( p_dec, &p_block )) )
 701         {
 702             vout_DatePicture( p_dec->p_owner->p_vout, p_pic, p_pic->date );
 703             vout_DisplayPicture( p_dec->p_owner->p_vout, p_pic );
 704         }
 705     }
 706     else if( p_dec->fmt_in.i_cat == SPU_ES )
 707     {
 708         p_dec->pf_decode_sub( p_dec, &p_block );
 709     }
 710     else
 711     {
 712         msg_Err( p_dec, "unknown ES format" );
 713         p_dec->b_error = 1;
 714     }
 715
 716     return p_dec->b_error ? VLC_EGENERIC : VLC_SUCCESS;
 717 }
 718
 719 /**
 720  * Destroys a decoder object
 721  *
 722  * \param p_dec the decoder object
 723  * \return nothing
 724  */
 725 static void DeleteDecoder( decoder_t * p_dec )
 726 {
 727     vlc_object_detach( p_dec );
 728
 729     msg_Dbg( p_dec, "killing decoder fourcc `%4.4s', %d PES in FIFO",
 730              (char*)&p_dec->fmt_in.i_codec,
 731              p_dec->p_owner->p_fifo->i_depth );
 732
 733     /* Free all packets still in the decoder fifo. */
 734     block_FifoEmpty( p_dec->p_owner->p_fifo );
 735     block_FifoRelease( p_dec->p_owner->p_fifo );
 736
 737    /* Cleanup */
 738     if( p_dec->p_owner->p_aout_input )
 739         aout_DecDelete( p_dec->p_owner->p_aout, p_dec->p_owner->p_aout_input );
 740
 741     if( p_dec->p_owner->p_vout )
 742     {
 743         int i_pic;
 744
 745 #define p_pic p_dec->p_owner->p_vout->render.pp_picture[i_pic]
 746         /* Hack to make sure all the the pictures are freed by the decoder */
 747         for( i_pic = 0; i_pic < p_dec->p_owner->p_vout->render.i_pictures;
 748              i_pic++ )
 749         {
 750             if( p_pic->i_status == RESERVED_PICTURE )
 751                 vout_DestroyPicture( p_dec->p_owner->p_vout, p_pic );
 752             if( p_pic->i_refcount > 0 )
 753                 vout_UnlinkPicture( p_dec->p_owner->p_vout, p_pic );
 754         }
 755 #undef p_pic
 756
 757         /* We are about to die. Reattach video output to p_vlc. */
 758         vout_Request( p_dec, p_dec->p_owner->p_vout, 0, 0, 0, 0 );
 759     }
 760
 761     if( p_dec->p_owner->p_sout_input )
 762     {
 763         sout_InputDelete( p_dec->p_owner->p_sout_input );
 764         es_format_Clean( &p_dec->p_owner->sout );
 765     }
 766
 767     es_format_Clean( &p_dec->fmt_in );
 768     es_format_Clean( &p_dec->fmt_out );
 769
 770     if( p_dec->p_owner->p_packetizer )
 771     {
 772         module_Unneed( p_dec->p_owner->p_packetizer,
 773                        p_dec->p_owner->p_packetizer->p_module );
 774         es_format_Clean( &p_dec->p_owner->p_packetizer->fmt_in );
 775         es_format_Clean( &p_dec->p_owner->p_packetizer->fmt_out );
 776         vlc_object_detach( p_dec->p_owner->p_packetizer );
 777         vlc_object_destroy( p_dec->p_owner->p_packetizer );
 778     }
 779
 780     free( p_dec->p_owner );
 781 }
 782
 783 /*****************************************************************************
 784  * Buffers allocation callbacks for the decoders
 785  *****************************************************************************/
 786 static aout_buffer_t *aout_new_buffer( decoder_t *p_dec, int i_samples )
 787 {
 788     decoder_owner_sys_t *p_sys = (decoder_owner_sys_t *)p_dec->p_owner;
 789     aout_buffer_t *p_buffer;
 790
 791     if( p_sys->p_aout_input != NULL &&
 792         ( p_dec->fmt_out.audio.i_rate != p_sys->audio.i_rate ||
 793           p_dec->fmt_out.audio.i_original_channels !=
 794               p_sys->audio.i_original_channels ||
 795           p_dec->fmt_out.audio.i_bytes_per_frame !=
 796               p_sys->audio.i_bytes_per_frame ) )
 797     {
 798         /* Parameters changed, restart the aout */
 799         aout_DecDelete( p_sys->p_aout, p_sys->p_aout_input );
 800         p_sys->p_aout_input = NULL;
 801     }
 802
 803     if( p_sys->p_aout_input == NULL )
 804     {
 805         p_dec->fmt_out.audio.i_format = p_dec->fmt_out.i_codec;
 806         p_sys->audio = p_dec->fmt_out.audio;
 807         p_sys->p_aout_input =
 808             aout_DecNew( p_dec, &p_sys->p_aout, &p_sys->audio );
 809         if( p_sys->p_aout_input == NULL )
 810         {
 811             msg_Err( p_dec, "failed to create audio output" );
 812             p_dec->b_error = VLC_TRUE;
 813             return NULL;
 814         }
 815         p_dec->fmt_out.audio.i_bytes_per_frame =
 816             p_sys->audio.i_bytes_per_frame;
 817     }
 818
 819     p_buffer = aout_DecNewBuffer( p_sys->p_aout, p_sys->p_aout_input,
 820                                   i_samples );
 821
 822     return p_buffer;
 823 }
 824
 825 static void aout_del_buffer( decoder_t *p_dec, aout_buffer_t *p_buffer )
 826 {
 827     aout_DecDeleteBuffer( p_dec->p_owner->p_aout,
 828                           p_dec->p_owner->p_aout_input, p_buffer );
 829 }
 830
 831 static picture_t *vout_new_buffer( decoder_t *p_dec )
 832 {
 833     decoder_owner_sys_t *p_sys = (decoder_owner_sys_t *)p_dec->p_owner;
 834     picture_t *p_pic;
 835
 836     if( p_sys->p_vout == NULL ||
 837         p_dec->fmt_out.video.i_width != p_sys->video.i_width ||
 838         p_dec->fmt_out.video.i_height != p_sys->video.i_height ||
 839         p_dec->fmt_out.video.i_chroma != p_sys->video.i_chroma ||
 840         p_dec->fmt_out.video.i_aspect != p_sys->video.i_aspect )
 841     {
 842         if( !p_dec->fmt_out.video.i_width ||
 843             !p_dec->fmt_out.video.i_height )
 844         {
 845             /* Can't create a new vout without display size */
 846             return NULL;
 847         }
 848
 849         p_dec->fmt_out.video.i_chroma = p_dec->fmt_out.i_codec;
 850         p_sys->video = p_dec->fmt_out.video;
 851
 852         p_sys->p_vout = vout_Request( p_dec, p_sys->p_vout,
 853                                       p_sys->video.i_width,
 854                                       p_sys->video.i_height,
 855                                       p_sys->video.i_chroma,
 856                                       p_sys->video.i_aspect );
 857
 858         if( p_sys->p_vout == NULL )
 859         {
 860             msg_Err( p_dec, "failed to create video output" );
 861             p_dec->b_error = VLC_TRUE;
 862             return NULL;
 863         }
 864     }
 865
 866     /* Get a new picture */
 867     while( !(p_pic = vout_CreatePicture( p_sys->p_vout, 0, 0, 0 ) ) )
 868     {
 869         int i_pic, i_ready_pic = 0;
 870
 871         if( p_dec->b_die || p_dec->b_error )
 872         {
 873             return NULL;
 874         }
 875
 876 #define p_pic p_dec->p_owner->p_vout->render.pp_picture[i_pic]
 877         /* Check the decoder doesn't leak pictures */
 878         for( i_pic = 0; i_pic < p_dec->p_owner->p_vout->render.i_pictures;
 879              i_pic++ )
 880         {
 881             if( p_pic->i_status == READY_PICTURE && i_ready_pic++ > 0 ) break;
 882
 883             if( p_pic->i_status != DISPLAYED_PICTURE &&
 884                 p_pic->i_status != RESERVED_PICTURE &&
 885                 p_pic->i_status != READY_PICTURE ) break;
 886
 887             if( !p_pic->i_refcount ) break;
 888         }
 889         if( i_pic == p_dec->p_owner->p_vout->render.i_pictures )
 890         {
 891             msg_Err( p_dec, "decoder is leaking pictures, resetting the heap" );
 892
 893             /* Just free all the pictures */
 894             for( i_pic = 0; i_pic < p_dec->p_owner->p_vout->render.i_pictures;
 895                  i_pic++ )
 896             {
 897                 if( p_pic->i_status == RESERVED_PICTURE )
 898                     vout_DestroyPicture( p_dec->p_owner->p_vout, p_pic );
 899                 if( p_pic->i_refcount > 0 )
 900                 vout_UnlinkPicture( p_dec->p_owner->p_vout, p_pic );
 901             }
 902         }
 903 #undef p_pic
 904
 905         msleep( VOUT_OUTMEM_SLEEP );
 906     }
 907
 908     return p_pic;
 909 }
 910
 911 static void vout_del_buffer( decoder_t *p_dec, picture_t *p_pic )
 912 {
 913     vout_DestroyPicture( p_dec->p_owner->p_vout, p_pic );
 914 }
 915
 916 static void vout_link_picture( decoder_t *p_dec, picture_t *p_pic )
 917 {
 918     vout_LinkPicture( p_dec->p_owner->p_vout, p_pic );
 919 }
 920
 921 static void vout_unlink_picture( decoder_t *p_dec, picture_t *p_pic )
 922 {
 923     vout_UnlinkPicture( p_dec->p_owner->p_vout, p_pic );
 924 }