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: input_dec.c,v 1.94 2004/03/03 20:39:53 gbazin Exp $
   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     aout_instance_t *p_aout;
  65     aout_input_t    *p_aout_input;
  66
  67     vout_thread_t   *p_vout;
  68
  69     sout_instance_t         *p_sout;
  70     sout_packetizer_input_t *p_sout_input;
  71
  72     /* Current format in use by the output */
  73     video_format_t video;
  74     audio_format_t audio;
  75     es_format_t    sout;
  76
  77     /* fifo */
  78     block_fifo_t *p_fifo;
  79
  80     /* */
  81     input_buffers_t *p_method_data;
  82     es_descriptor_t *p_es_descriptor;
  83 };
  84
  85
  86 /**
  87  * Spawns a new decoder thread
  88  *
  89  * \param p_input the input thread
  90  * \param p_es the es descriptor
  91  * \return the spawned decoder object
  92  */
  93 decoder_t * input_RunDecoder( input_thread_t * p_input, es_descriptor_t * p_es )
  94 {
  95     decoder_t      *p_dec = NULL;
  96     vlc_value_t    val;
  97
  98     /* If we are in sout mode, search for packetizer module */
  99     if( !p_es->b_force_decoder && p_input->stream.p_sout )
 100     {
 101         /* Create the decoder configuration structure */
 102         p_dec = CreateDecoder( p_input, p_es, VLC_OBJECT_PACKETIZER );
 103         if( p_dec == NULL )
 104         {
 105             msg_Err( p_input, "could not create packetizer" );
 106             return NULL;
 107         }
 108
 109         p_dec->p_module = module_Need( p_dec, "packetizer", "$packetizer", 0 );
 110     }
 111     else
 112     {
 113         /* Create the decoder configuration structure */
 114         p_dec = CreateDecoder( p_input, p_es, VLC_OBJECT_DECODER );
 115         if( p_dec == NULL )
 116         {
 117             msg_Err( p_input, "could not create decoder" );
 118             return NULL;
 119         }
 120
 121         /* default Get a suitable decoder module */
 122         p_dec->p_module = module_Need( p_dec, "decoder", "$codec", 0 );
 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     var_Get( p_input, "minimize-threads", &val );
 137     p_dec->p_owner->b_own_thread = val.b_bool ? VLC_FALSE : VLC_TRUE;
 138
 139     if( p_dec->p_owner->b_own_thread )
 140     {
 141         int i_priority;
 142         if ( p_es->i_cat == AUDIO_ES )
 143         {
 144             i_priority = VLC_THREAD_PRIORITY_AUDIO;
 145         }
 146         else
 147         {
 148             i_priority = VLC_THREAD_PRIORITY_VIDEO;
 149         }
 150
 151         /* Spawn the decoder thread */
 152         if( vlc_thread_create( p_dec, "decoder", DecoderThread,
 153                                i_priority, VLC_FALSE ) )
 154         {
 155             msg_Err( p_dec, "cannot spawn decoder thread \"%s\"",
 156                              p_dec->p_module->psz_object_name );
 157             module_Unneed( p_dec, p_dec->p_module );
 158             DeleteDecoder( p_dec );
 159             vlc_object_destroy( p_dec );
 160             return NULL;
 161         }
 162     }
 163
 164     p_input->stream.b_changed = 1;
 165
 166     return p_dec;
 167 }
 168
 169 /**
 170  * Kills a decoder thread and waits until it's finished
 171  *
 172  * \param p_input the input thread
 173  * \param p_es the es descriptor
 174  * \return nothing
 175  */
 176 void input_EndDecoder( input_thread_t * p_input, es_descriptor_t * p_es )
 177 {
 178     decoder_t *p_dec = p_es->p_dec;
 179     int i_dummy;
 180
 181     p_dec->b_die = VLC_TRUE;
 182
 183     if( p_dec->p_owner->b_own_thread )
 184     {
 185         /* Make sure the thread leaves the NextDataPacket() function by
 186          * sending it a few null packets. */
 187         for( i_dummy = 0; i_dummy < PADDING_PACKET_NUMBER; i_dummy++ )
 188         {
 189             input_NullPacket( p_input, p_es );
 190         }
 191
 192         if( p_es->p_pes != NULL )
 193         {
 194             input_DecodePES( p_es->p_dec, p_es->p_pes );
 195         }
 196
 197         /* Waiting for the thread to exit */
 198         /* I thought that unlocking was better since thread join can be long
 199          * but it actually creates late pictures and freezes --stef */
 200         /* vlc_mutex_unlock( &p_input->stream.stream_lock ); */
 201         vlc_thread_join( p_dec );
 202         /* vlc_mutex_lock( &p_input->stream.stream_lock ); */
 203 #if 0
 204         /* XXX We don't do it here because of dll loader that want close in the
 205          * same thread than open/decode */
 206         /* Unneed module */
 207         module_Unneed( p_dec, p_dec->p_module );
 208 #endif
 209     }
 210     else
 211     {
 212         module_Unneed( p_dec, p_dec->p_module );
 213     }
 214
 215     /* Delete decoder configuration */
 216     DeleteDecoder( p_dec );
 217
 218     /* Delete the decoder */
 219     vlc_object_destroy( p_dec );
 220
 221     /* Tell the input there is no more decoder */
 222     p_es->p_dec = NULL;
 223
 224     p_input->stream.b_changed = 1;
 225 }
 226
 227 /**
 228  * Put a PES in the decoder's fifo.
 229  *
 230  * \param p_dec the decoder object
 231  * \param p_pes the pes packet
 232  * \return nothing
 233  */
 234 void input_DecodePES( decoder_t * p_dec, pes_packet_t * p_pes )
 235 {
 236     data_packet_t *p_data;
 237     int     i_size = 0;
 238
 239     for( p_data = p_pes->p_first; p_data != NULL; p_data = p_data->p_next )
 240     {
 241         i_size += p_data->p_payload_end - p_data->p_payload_start;
 242     }
 243     if( i_size > 0 )
 244     {
 245         block_t *p_block = block_New( p_dec, i_size );
 246         if( p_block )
 247         {
 248             uint8_t *p_buffer = p_block->p_buffer;
 249
 250             for( p_data = p_pes->p_first; p_data != NULL; p_data = p_data->p_next )
 251             {
 252                 int i_copy = p_data->p_payload_end - p_data->p_payload_start;
 253
 254                 memcpy( p_buffer, p_data->p_payload_start, i_copy );
 255
 256                 p_buffer += i_copy;
 257             }
 258             p_block->i_pts = p_pes->i_pts;
 259             p_block->i_dts = p_pes->i_dts;
 260             if( p_pes->b_discontinuity )
 261                 p_block->i_flags |= BLOCK_FLAG_DISCONTINUITY;
 262             p_block->i_rate = p_pes->i_rate;
 263
 264             input_DecodeBlock( p_dec, p_block );
 265         }
 266     }
 267
 268     input_DeletePES( p_dec->p_owner->p_method_data, p_pes );
 269 }
 270
 271 /**
 272  * Put a block_t in the decoder's fifo.
 273  *
 274  * \param p_dec the decoder object
 275  * \param p_block the data block
 276  */
 277 void input_DecodeBlock( decoder_t * p_dec, block_t *p_block )
 278 {
 279     if( p_dec->p_owner->b_own_thread )
 280     {
 281         block_FifoPut( p_dec->p_owner->p_fifo, p_block );
 282     }
 283     else
 284     {
 285         if( p_dec->b_error || p_block->i_buffer <= 0 )
 286         {
 287             block_Release( p_block );
 288         }
 289         else
 290         {
 291             DecoderDecode( p_dec, p_block );
 292         }
 293     }
 294 }
 295
 296 /**
 297  * Create a NULL packet for padding in case of a data loss
 298  *
 299  * \param p_input the input thread
 300  * \param p_es es descriptor
 301  * \return nothing
 302  */
 303 static void input_NullPacket( input_thread_t * p_input,
 304                               es_descriptor_t * p_es )
 305 {
 306     block_t *p_block = block_New( p_input, PADDING_PACKET_SIZE );
 307     if( p_block )
 308     {
 309         memset( p_block->p_buffer, 0, PADDING_PACKET_SIZE );
 310         p_block->i_flags |= BLOCK_FLAG_DISCONTINUITY;
 311
 312         block_FifoPut( p_es->p_dec->p_owner->p_fifo, p_block );
 313     }
 314 }
 315
 316 /**
 317  * Send a NULL packet to the decoders
 318  *
 319  * \param p_input the input thread
 320  * \return nothing
 321  */
 322 void input_EscapeDiscontinuity( input_thread_t * p_input )
 323 {
 324     unsigned int i_es, i;
 325
 326     for( i_es = 0; i_es < p_input->stream.i_selected_es_number; i_es++ )
 327     {
 328         es_descriptor_t * p_es = p_input->stream.pp_selected_es[i_es];
 329
 330         if( p_es->p_dec != NULL )
 331         {
 332             for( i = 0; i < PADDING_PACKET_NUMBER; i++ )
 333             {
 334                 input_NullPacket( p_input, p_es );
 335             }
 336         }
 337     }
 338 }
 339
 340 /**
 341  * Send a NULL packet to the audio decoders
 342  *
 343  * \param p_input the input thread
 344  * \return nothing
 345  */
 346 void input_EscapeAudioDiscontinuity( input_thread_t * p_input )
 347 {
 348     unsigned int i_es, i;
 349
 350     for( i_es = 0; i_es < p_input->stream.i_selected_es_number; i_es++ )
 351     {
 352         es_descriptor_t * p_es = p_input->stream.pp_selected_es[i_es];
 353
 354         if( p_es->p_dec != NULL && p_es->i_cat == AUDIO_ES )
 355         {
 356             for( i = 0; i < PADDING_PACKET_NUMBER; i++ )
 357             {
 358                 input_NullPacket( p_input, p_es );
 359             }
 360         }
 361     }
 362 }
 363
 364 /**
 365  * Create a decoder object
 366  *
 367  * \param p_input the input thread
 368  * \param p_es the es descriptor
 369  * \param i_object_type Object type as define in include/vlc_objects.h
 370  * \return the decoder object
 371  */
 372 static decoder_t * CreateDecoder( input_thread_t * p_input,
 373                                   es_descriptor_t * p_es, int i_object_type )
 374 {
 375     decoder_t *p_dec;
 376
 377     p_dec = vlc_object_create( p_input, i_object_type );
 378     if( p_dec == NULL )
 379     {
 380         msg_Err( p_input, "out of memory" );
 381         return NULL;
 382     }
 383
 384     p_dec->pf_decode_audio = 0;
 385     p_dec->pf_decode_video = 0;
 386     p_dec->pf_decode_sub = 0;
 387     p_dec->pf_packetize = 0;
 388
 389     /* Select a new ES */
 390     INSERT_ELEM( p_input->stream.pp_selected_es,
 391                  p_input->stream.i_selected_es_number,
 392                  p_input->stream.i_selected_es_number,
 393                  p_es );
 394
 395     /* Initialize the decoder fifo */
 396     p_dec->p_module = NULL;
 397
 398     p_dec->fmt_in = p_es->fmt;
 399
 400     if( p_es->p_waveformatex )
 401     {
 402 #define p_wf ((WAVEFORMATEX *)p_es->p_waveformatex)
 403         p_dec->fmt_in.audio.i_channels = p_wf->nChannels;
 404         p_dec->fmt_in.audio.i_rate = p_wf->nSamplesPerSec;
 405         p_dec->fmt_in.i_bitrate = p_wf->nAvgBytesPerSec * 8;
 406         p_dec->fmt_in.audio.i_blockalign = p_wf->nBlockAlign;
 407         p_dec->fmt_in.audio.i_bitspersample = p_wf->wBitsPerSample;
 408         p_dec->fmt_in.i_extra = p_wf->cbSize;
 409         p_dec->fmt_in.p_extra = NULL;
 410         if( p_wf->cbSize )
 411         {
 412             p_dec->fmt_in.p_extra = malloc( p_wf->cbSize );
 413             memcpy( p_dec->fmt_in.p_extra, &p_wf[1], p_wf->cbSize );
 414         }
 415     }
 416
 417     if( p_es->p_bitmapinfoheader )
 418     {
 419 #define p_bih ((BITMAPINFOHEADER *) p_es->p_bitmapinfoheader)
 420         p_dec->fmt_in.i_extra = p_bih->biSize - sizeof(BITMAPINFOHEADER);
 421         p_dec->fmt_in.p_extra = NULL;
 422         if( p_dec->fmt_in.i_extra )
 423         {
 424             p_dec->fmt_in.p_extra = malloc( p_dec->fmt_in.i_extra );
 425             memcpy( p_dec->fmt_in.p_extra, &p_bih[1], p_dec->fmt_in.i_extra );
 426         }
 427
 428         p_dec->fmt_in.video.i_width = p_bih->biWidth;
 429         p_dec->fmt_in.video.i_height = p_bih->biHeight;
 430     }
 431
 432     /* FIXME
 433      *  - 1: beurk
 434      *  - 2: I'm not sure there isn't any endian problem here (spu)... */
 435     if( p_es->i_cat == SPU_ES && p_es->p_demux_data )
 436     {
 437         if( ( p_es->i_fourcc == VLC_FOURCC( 's', 'p', 'u', ' ' ) ||
 438               p_es->i_fourcc == VLC_FOURCC( 's', 'p', 'u', 'b' ) ) &&
 439             *((uint32_t*)p_es->p_demux_data) == 0xBeef )
 440         {
 441             memcpy( p_dec->fmt_in.subs.spu.palette,
 442                     p_es->p_demux_data, 17 * 4 );
 443         }
 444         else if( p_es->i_fourcc == VLC_FOURCC( 'd', 'v', 'b', 's' ) )
 445         {
 446             dvb_spuinfo_t *p_dvbs = (dvb_spuinfo_t*)p_es->p_demux_data;
 447
 448             p_dec->fmt_in.subs.dvb.i_id = p_dvbs->i_id;
 449         }
 450     }
 451
 452     p_dec->fmt_in.i_cat = p_es->i_cat;
 453     p_dec->fmt_in.i_codec = p_es->i_fourcc;
 454
 455     p_dec->fmt_out = null_es_format;
 456
 457     /* Allocate our private structure for the decoder */
 458     p_dec->p_owner = (decoder_owner_sys_t*)malloc(sizeof(decoder_owner_sys_t));
 459     if( p_dec->p_owner == NULL )
 460     {
 461         msg_Err( p_dec, "out of memory" );
 462         return NULL;
 463     }
 464     p_dec->p_owner->b_own_thread = VLC_TRUE;
 465     p_dec->p_owner->p_aout = NULL;
 466     p_dec->p_owner->p_aout_input = NULL;
 467     p_dec->p_owner->p_vout = NULL;
 468     p_dec->p_owner->p_sout = p_input->stream.p_sout;
 469     p_dec->p_owner->p_sout_input = NULL;
 470     p_dec->p_owner->p_es_descriptor = p_es;
 471     /* decoder fifo */
 472     if( ( p_dec->p_owner->p_fifo = block_FifoNew( p_dec ) ) == NULL )
 473     {
 474         msg_Err( p_dec, "out of memory" );
 475         return NULL;
 476     }
 477     p_dec->p_owner->p_method_data = p_input->p_method_data;
 478
 479     /* Set buffers allocation callbacks for the decoders */
 480     p_dec->pf_aout_buffer_new = aout_new_buffer;
 481     p_dec->pf_aout_buffer_del = aout_del_buffer;
 482     p_dec->pf_vout_buffer_new = vout_new_buffer;
 483     p_dec->pf_vout_buffer_del = vout_del_buffer;
 484     p_dec->pf_picture_link    = vout_link_picture;
 485     p_dec->pf_picture_unlink  = vout_unlink_picture;
 486
 487     vlc_object_attach( p_dec, p_input );
 488
 489     return p_dec;
 490 }
 491
 492 /**
 493  * The decoding main loop
 494  *
 495  * \param p_dec the decoder
 496  * \return 0
 497  */
 498 static int DecoderThread( decoder_t * p_dec )
 499 {
 500     block_t       *p_block;
 501
 502     /* The decoder's main loop */
 503     while( !p_dec->b_die && !p_dec->b_error )
 504     {
 505         if( ( p_block = block_FifoGet( p_dec->p_owner->p_fifo ) ) == NULL )
 506         {
 507             p_dec->b_error = 1;
 508             break;
 509         }
 510         if( p_block->i_buffer <= 0 )
 511         {
 512             block_Release( p_block );
 513             continue;
 514         }
 515         if( DecoderDecode( p_dec, p_block ) )
 516         {
 517             break;
 518         }
 519     }
 520
 521     while( !p_dec->b_die )
 522     {
 523         /* Trash all received PES packets */
 524         p_block = block_FifoGet( p_dec->p_owner->p_fifo );
 525         if( p_block )
 526         {
 527             block_Release( p_block );
 528         }
 529     }
 530
 531     /* XXX We do it here because of dll loader that want close in the
 532      * same thread than open/decode */
 533     /* Unneed module */
 534     module_Unneed( p_dec, p_dec->p_module );
 535
 536     return 0;
 537 }
 538
 539 /**
 540  * Decode a block
 541  *
 542  * \param p_dec the decoder object
 543  * \param p_block the block to decode
 544  * \return VLC_SUCCESS or an error code
 545  */
 546 static int DecoderDecode( decoder_t *p_dec, block_t *p_block )
 547 {
 548     if( p_block->i_buffer <= 0 )
 549     {
 550         block_Release( p_block );
 551         return VLC_SUCCESS;
 552     }
 553
 554     if( p_dec->i_object_type == VLC_OBJECT_PACKETIZER )
 555     {
 556         block_t *p_sout_block;
 557
 558         while( (p_sout_block = p_dec->pf_packetize( p_dec, &p_block )) )
 559         {
 560             if( !p_dec->p_owner->p_sout_input )
 561             {
 562                 es_format_Copy( &p_dec->p_owner->sout, &p_dec->fmt_out );
 563                 if( p_dec->p_owner->p_es_descriptor->p_pgrm )
 564                 {
 565                     p_dec->p_owner->sout.i_group =
 566                         p_dec->p_owner->p_es_descriptor->p_pgrm->i_number;
 567                 }
 568                 p_dec->p_owner->sout.i_id = p_dec->p_owner->p_es_descriptor->i_id - 1;
 569                 if( p_dec->fmt_in.psz_language )
 570                 {
 571                     p_dec->p_owner->sout.psz_language = strdup( p_dec->fmt_in.psz_language );
 572                 }
 573
 574                 p_dec->p_owner->p_sout_input =
 575                     sout_InputNew( p_dec->p_owner->p_sout, &p_dec->p_owner->sout );
 576
 577                 if( p_dec->p_owner->p_sout_input == NULL )
 578                 {
 579                     msg_Err( p_dec, "cannot create packetizer output" );
 580                     p_dec->b_error = VLC_TRUE;
 581
 582                     while( p_sout_block )
 583                     {
 584                         block_t       *p_next = p_sout_block->p_next;
 585                         block_Release( p_sout_block );
 586                         p_sout_block = p_next;
 587                     }
 588                     break;
 589                 }
 590             }
 591
 592             while( p_sout_block )
 593             {
 594                 block_t       *p_next = p_sout_block->p_next;
 595                 sout_buffer_t *p_sout_buffer;
 596
 597                 p_sout_buffer =
 598                     sout_BufferNew( p_dec->p_owner->p_sout_input->p_sout,
 599                                     p_sout_block->i_buffer );
 600                 if( p_sout_buffer == NULL )
 601                 {
 602                     msg_Err( p_dec, "cannot get sout buffer" );
 603                     break;
 604                 }
 605
 606                 memcpy( p_sout_buffer->p_buffer, p_sout_block->p_buffer,
 607                         p_sout_block->i_buffer );
 608
 609                 p_sout_buffer->i_pts = p_sout_block->i_pts;
 610                 p_sout_buffer->i_dts = p_sout_block->i_dts;
 611                 p_sout_buffer->i_length = p_sout_block->i_length;
 612                 p_sout_buffer->i_flags =
 613                         (p_sout_block->i_flags << SOUT_BUFFER_FLAGS_BLOCK_SHIFT)
 614                           & SOUT_BUFFER_FLAGS_BLOCK_MASK;
 615
 616                 block_Release( p_sout_block );
 617
 618                 sout_InputSendBuffer( p_dec->p_owner->p_sout_input, p_sout_buffer );
 619
 620                 p_sout_block = p_next;
 621             }
 622         }
 623     }
 624     else if( p_dec->fmt_in.i_cat == AUDIO_ES )
 625     {
 626         aout_buffer_t *p_aout_buf;
 627
 628         while( (p_aout_buf = p_dec->pf_decode_audio( p_dec, &p_block )) )
 629         {
 630             aout_DecPlay( p_dec->p_owner->p_aout,
 631                           p_dec->p_owner->p_aout_input, p_aout_buf );
 632         }
 633     }
 634     else if( p_dec->fmt_in.i_cat == VIDEO_ES )
 635     {
 636         picture_t *p_pic;
 637
 638         while( (p_pic = p_dec->pf_decode_video( p_dec, &p_block )) )
 639         {
 640             vout_DatePicture( p_dec->p_owner->p_vout, p_pic, p_pic->date );
 641             vout_DisplayPicture( p_dec->p_owner->p_vout, p_pic );
 642         }
 643     }
 644     else if( p_dec->fmt_in.i_cat == SPU_ES )
 645     {
 646         p_dec->pf_decode_sub( p_dec, &p_block );
 647     }
 648     else
 649     {
 650         msg_Err( p_dec, "unknown ES format" );
 651         p_dec->b_error = 1;
 652     }
 653
 654     return p_dec->b_error ? VLC_EGENERIC : VLC_SUCCESS;
 655 }
 656
 657 /**
 658  * Destroys a decoder object
 659  *
 660  * \param p_dec the decoder object
 661  * \return nothing
 662  */
 663 static void DeleteDecoder( decoder_t * p_dec )
 664 {
 665     vlc_object_detach( p_dec );
 666
 667     msg_Dbg( p_dec,
 668              "killing decoder fourcc `%4.4s', %d PES in FIFO",
 669              (char*)&p_dec->fmt_in.i_codec,
 670              p_dec->p_owner->p_fifo->i_depth );
 671
 672     /* Free all packets still in the decoder fifo. */
 673     block_FifoEmpty( p_dec->p_owner->p_fifo );
 674     block_FifoRelease( p_dec->p_owner->p_fifo );
 675
 676    /* Cleanup */
 677     if( p_dec->p_owner->p_aout_input )
 678         aout_DecDelete( p_dec->p_owner->p_aout, p_dec->p_owner->p_aout_input );
 679
 680     if( p_dec->p_owner->p_vout )
 681     {
 682         int i_pic;
 683
 684 #define p_pic p_dec->p_owner->p_vout->render.pp_picture[i_pic]
 685         /* Hack to make sure all the the pictures are freed by the decoder */
 686         for( i_pic = 0; i_pic < p_dec->p_owner->p_vout->render.i_pictures;
 687              i_pic++ )
 688         {
 689             if( p_pic->i_status == RESERVED_PICTURE )
 690                 vout_DestroyPicture( p_dec->p_owner->p_vout, p_pic );
 691             if( p_pic->i_refcount > 0 )
 692                 vout_UnlinkPicture( p_dec->p_owner->p_vout, p_pic );
 693         }
 694 #undef p_pic
 695
 696         /* We are about to die. Reattach video output to p_vlc. */
 697         vout_Request( p_dec, p_dec->p_owner->p_vout, 0, 0, 0, 0 );
 698     }
 699
 700     if( p_dec->p_owner->p_sout_input )
 701     {
 702         sout_InputDelete( p_dec->p_owner->p_sout_input );
 703         if( p_dec->p_owner->sout.i_extra ) free(p_dec->p_owner->sout.p_extra);
 704     }
 705
 706     if( p_dec->fmt_in.i_extra ) free( p_dec->fmt_in.p_extra );
 707     if( p_dec->fmt_out.i_extra ) free( p_dec->fmt_out.p_extra );
 708
 709     free( p_dec->p_owner );
 710 }
 711
 712 /*****************************************************************************
 713  * Buffers allocation callbacks for the decoders
 714  *****************************************************************************/
 715 static aout_buffer_t *aout_new_buffer( decoder_t *p_dec, int i_samples )
 716 {
 717     decoder_owner_sys_t *p_sys = (decoder_owner_sys_t *)p_dec->p_owner;
 718     aout_buffer_t *p_buffer;
 719
 720     if( p_sys->p_aout_input != NULL &&
 721         ( p_dec->fmt_out.audio.i_rate != p_sys->audio.i_rate ||
 722           p_dec->fmt_out.audio.i_original_channels !=
 723               p_sys->audio.i_original_channels ||
 724           p_dec->fmt_out.audio.i_bytes_per_frame !=
 725               p_sys->audio.i_bytes_per_frame ) )
 726     {
 727         /* Parameters changed, restart the aout */
 728         aout_DecDelete( p_sys->p_aout, p_sys->p_aout_input );
 729         p_sys->p_aout_input = NULL;
 730     }
 731
 732     if( p_sys->p_aout_input == NULL )
 733     {
 734         p_dec->fmt_out.audio.i_format = p_dec->fmt_out.i_codec;
 735         p_sys->audio = p_dec->fmt_out.audio;
 736         p_sys->p_aout_input =
 737             aout_DecNew( p_dec, &p_sys->p_aout, &p_sys->audio );
 738         if( p_sys->p_aout_input == NULL )
 739         {
 740             msg_Err( p_dec, "failed to create audio output" );
 741             p_dec->b_error = VLC_TRUE;
 742             return NULL;
 743         }
 744         p_dec->fmt_out.audio.i_bytes_per_frame =
 745             p_sys->audio.i_bytes_per_frame;
 746     }
 747
 748     p_buffer = aout_DecNewBuffer( p_sys->p_aout, p_sys->p_aout_input,
 749                                   i_samples );
 750
 751     return p_buffer;
 752 }
 753
 754 static void aout_del_buffer( decoder_t *p_dec, aout_buffer_t *p_buffer )
 755 {
 756     aout_DecDeleteBuffer( p_dec->p_owner->p_aout,
 757                           p_dec->p_owner->p_aout_input, p_buffer );
 758 }
 759
 760 static picture_t *vout_new_buffer( decoder_t *p_dec )
 761 {
 762     decoder_owner_sys_t *p_sys = (decoder_owner_sys_t *)p_dec->p_owner;
 763     picture_t *p_pic;
 764
 765     if( p_sys->p_vout == NULL ||
 766         p_dec->fmt_out.video.i_width != p_sys->video.i_width ||
 767         p_dec->fmt_out.video.i_height != p_sys->video.i_height ||
 768         p_dec->fmt_out.video.i_chroma != p_sys->video.i_chroma ||
 769         p_dec->fmt_out.video.i_aspect != p_sys->video.i_aspect )
 770     {
 771         if( !p_dec->fmt_out.video.i_width ||
 772             !p_dec->fmt_out.video.i_height )
 773         {
 774             /* Can't create a new vout without display size */
 775             return NULL;
 776         }
 777
 778         p_dec->fmt_out.video.i_chroma = p_dec->fmt_out.i_codec;
 779         p_sys->video = p_dec->fmt_out.video;
 780
 781         p_sys->p_vout = vout_Request( p_dec, p_sys->p_vout,
 782                                       p_sys->video.i_width,
 783                                       p_sys->video.i_height,
 784                                       p_sys->video.i_chroma,
 785                                       p_sys->video.i_aspect );
 786
 787         if( p_sys->p_vout == NULL )
 788         {
 789             msg_Err( p_dec, "failed to create video output" );
 790             p_dec->b_error = VLC_TRUE;
 791             return NULL;
 792         }
 793     }
 794
 795     /* Get a new picture */
 796     while( !(p_pic = vout_CreatePicture( p_sys->p_vout, 0, 0, 0 ) ) )
 797     {
 798         int i_pic, i_ready_pic = 0;
 799
 800         if( p_dec->b_die || p_dec->b_error )
 801         {
 802             return NULL;
 803         }
 804
 805 #define p_pic p_dec->p_owner->p_vout->render.pp_picture[i_pic]
 806         /* Check the decoder doesn't leak pictures */
 807         for( i_pic = 0; i_pic < p_dec->p_owner->p_vout->render.i_pictures;
 808              i_pic++ )
 809         {
 810             if( p_pic->i_status == READY_PICTURE && i_ready_pic++ > 0 ) break;
 811
 812             if( p_pic->i_status != DISPLAYED_PICTURE &&
 813                 p_pic->i_status != RESERVED_PICTURE &&
 814                 p_pic->i_status != READY_PICTURE ) break;
 815
 816             if( !p_pic->i_refcount ) break;
 817         }
 818         if( i_pic == p_dec->p_owner->p_vout->render.i_pictures )
 819         {
 820             msg_Err( p_dec, "decoder is leaking pictures, resetting the heap" );
 821
 822             /* Just free all the pictures */
 823             for( i_pic = 0; i_pic < p_dec->p_owner->p_vout->render.i_pictures;
 824                  i_pic++ )
 825             {
 826                 if( p_pic->i_status == RESERVED_PICTURE )
 827                     vout_DestroyPicture( p_dec->p_owner->p_vout, p_pic );
 828                 if( p_pic->i_refcount > 0 )
 829                 vout_UnlinkPicture( p_dec->p_owner->p_vout, p_pic );
 830             }
 831         }
 832 #undef p_pic
 833
 834         msleep( VOUT_OUTMEM_SLEEP );
 835     }
 836
 837     return p_pic;
 838 }
 839
 840 static void vout_del_buffer( decoder_t *p_dec, picture_t *p_pic )
 841 {
 842     vout_DestroyPicture( p_dec->p_owner->p_vout, p_pic );
 843 }
 844
 845 static void vout_link_picture( decoder_t *p_dec, picture_t *p_pic )
 846 {
 847     vout_LinkPicture( p_dec->p_owner->p_vout, p_pic );
 848 }
 849
 850 static void vout_unlink_picture( decoder_t *p_dec, picture_t *p_pic )
 851 {
 852     vout_UnlinkPicture( p_dec->p_owner->p_vout, p_pic );
 853 }