git.sesse.net Git - vlc/blob - modules/codec/libmpeg2.c

   1 /*****************************************************************************
   2  * libmpeg2.c: mpeg2 video decoder module making use of libmpeg2.
   3  *****************************************************************************
   4  * Copyright (C) 1999-2001 VideoLAN
   5  * $Id: libmpeg2.c,v 1.22 2003/06/10 23:01:40 massiot Exp $
   6  *
   7  * Authors: Gildas Bazin <gbazin@netcourrier.com>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
  22  *****************************************************************************/
  23
  24 /*****************************************************************************
  25  * Preamble
  26  *****************************************************************************/
  27 #include <vlc/vlc.h>
  28 #include <vlc/vout.h>
  29 #include <vlc/input.h>
  30 #include <vlc/decoder.h>
  31
  32 #include <stdlib.h>                                      /* malloc(), free() */
  33 #include <string.h>                                    /* memcpy(), memset() */
  34
  35 #include <mpeg2dec/mpeg2.h>
  36
  37 #include "vout_synchro.h"
  38
  39 /* Aspect ratio (ISO/IEC 13818-2 section 6.3.3, table 6-3) */
  40 #define AR_SQUARE_PICTURE       1                           /* square pixels */
  41 #define AR_3_4_PICTURE          2                        /* 3:4 picture (TV) */
  42 #define AR_16_9_PICTURE         3              /* 16:9 picture (wide screen) */
  43 #define AR_221_1_PICTURE        4                  /* 2.21:1 picture (movie) */
  44
  45 /*****************************************************************************
  46  * dec_thread_t : libmpeg2 decoder thread descriptor
  47  *****************************************************************************/
  48 typedef struct dec_thread_t
  49 {
  50     /*
  51      * libmpeg2 properties
  52      */
  53     mpeg2dec_t          *p_mpeg2dec;
  54     const mpeg2_info_t  *p_info;
  55     vlc_bool_t          b_skip;
  56
  57     /*
  58      * Input properties
  59      */
  60     decoder_fifo_t   *p_fifo;                  /* stores the PES stream data */
  61     pes_packet_t     *p_pes;                  /* current PES we are decoding */
  62     mtime_t          i_pts;
  63     mtime_t          i_previous_pts;
  64     mtime_t          i_current_pts;
  65     mtime_t          i_period_remainder;
  66     int              i_current_rate;
  67     picture_t *      p_picture_to_destroy;
  68     vlc_bool_t       b_garbage_pic;
  69     vlc_bool_t       b_after_sequence_header; /* is it the next frame after
  70                                                * the sequence header ?    */
  71     vlc_bool_t       b_slice_i;             /* intra-slice refresh stream */
  72
  73     /*
  74      * Output properties
  75      */
  76     vout_thread_t *p_vout;
  77     vout_synchro_t *p_synchro;
  78
  79 } dec_thread_t;
  80
  81 /*****************************************************************************
  82  * Local prototypes
  83  *****************************************************************************/
  84 static int  OpenDecoder  ( vlc_object_t * );
  85 static int  RunDecoder   ( decoder_fifo_t * );
  86 static void CloseDecoder ( dec_thread_t * );
  87
  88 static picture_t *GetNewPicture( dec_thread_t *, uint8_t ** );
  89
  90 /*****************************************************************************
  91  * Module descriptor
  92  *****************************************************************************/
  93 vlc_module_begin();
  94     set_description( _("MPEG I/II video decoder (using libmpeg2)") );
  95     set_capability( "decoder", 40 );
  96     set_callbacks( OpenDecoder, NULL );
  97     add_shortcut( "libmpeg2" );
  98 vlc_module_end();
  99
 100 /*****************************************************************************
 101  * OpenDecoder: probe the decoder and return score
 102  *****************************************************************************/
 103 static int OpenDecoder( vlc_object_t *p_this )
 104 {
 105     decoder_fifo_t *p_fifo = (decoder_fifo_t*) p_this;
 106
 107     if( p_fifo->i_fourcc != VLC_FOURCC('m','p','g','v') )
 108     {
 109         return VLC_EGENERIC;
 110     }
 111
 112     p_fifo->pf_run = RunDecoder;
 113     return VLC_SUCCESS;
 114 }
 115
 116 /*****************************************************************************
 117  * RunDecoder: the libmpeg2 decoder
 118  *****************************************************************************/
 119 static int RunDecoder( decoder_fifo_t *p_fifo )
 120 {
 121     dec_thread_t    *p_dec;
 122     data_packet_t   *p_data = NULL;
 123     mpeg2_state_t   state;
 124     picture_t       *p_pic;
 125     int             i_aspect, i_chroma;
 126
 127     /* Allocate the memory needed to store the thread's structure */
 128     if( (p_dec = (dec_thread_t *)malloc (sizeof(dec_thread_t)) )
 129         == NULL)
 130     {
 131         msg_Err( p_fifo, "out of memory" );
 132         goto error;
 133     }
 134
 135     /* Initialize the thread properties */
 136     memset( p_dec, 0, sizeof(dec_thread_t) );
 137     p_dec->p_fifo     = p_fifo;
 138     p_dec->p_pes      = NULL;
 139     p_dec->p_vout     = NULL;
 140     p_dec->p_mpeg2dec = NULL;
 141     p_dec->p_synchro  = NULL;
 142     p_dec->p_info     = NULL;
 143     p_dec->i_pts      = mdate() + DEFAULT_PTS_DELAY;
 144     p_dec->i_current_pts  = 0;
 145     p_dec->i_previous_pts = 0;
 146     p_dec->i_period_remainder = 0;
 147     p_dec->p_picture_to_destroy = NULL;
 148     p_dec->b_garbage_pic = 0;
 149     p_dec->b_slice_i  = 0;
 150     p_dec->b_skip     = 0;
 151
 152     /* Initialize decoder */
 153     p_dec->p_mpeg2dec = mpeg2_init();
 154     if( p_dec->p_mpeg2dec == NULL)
 155         goto error;
 156
 157     p_dec->p_info = mpeg2_info( p_dec->p_mpeg2dec );
 158
 159     /* libmpeg2 decoder thread's main loop */
 160     while( (!p_dec->p_fifo->b_die) && (!p_dec->p_fifo->b_error) )
 161     {
 162         state = mpeg2_parse( p_dec->p_mpeg2dec );
 163
 164         switch( state )
 165         {
 166         case STATE_BUFFER:
 167             /* Feed libmpeg2 a data packet at a time */
 168             if( p_data == NULL )
 169             {
 170                 /* Get the next PES */
 171                 if( p_dec->p_pes )
 172                     input_DeletePES( p_dec->p_fifo->p_packets_mgt,
 173                                      p_dec->p_pes );
 174
 175                 input_ExtractPES( p_dec->p_fifo, &p_dec->p_pes );
 176                 if( !p_dec->p_pes )
 177                 {
 178                     p_dec->p_fifo->b_error = 1;
 179                     break;
 180                 }
 181
 182                 if( p_dec->p_pes->b_discontinuity && p_dec->p_synchro
 183                      && p_dec->p_info->sequence->width != (unsigned)-1 )
 184                 {
 185                     vout_SynchroReset( p_dec->p_synchro );
 186                     if ( p_dec->p_info->current_fbuf != NULL
 187                           && p_dec->p_info->current_fbuf->id != NULL )
 188                     {
 189                         p_dec->b_garbage_pic = 1;
 190                         p_pic = p_dec->p_info->current_fbuf->id;
 191                     }
 192                     else
 193                     {
 194                         uint8_t *buf[3];
 195                         buf[0] = buf[1] = buf[2] = NULL;
 196                         if( (p_pic = GetNewPicture( p_dec, buf )) == NULL )
 197                             break;
 198                         mpeg2_set_buf( p_dec->p_mpeg2dec, buf, p_pic );
 199                     }
 200                     p_dec->p_picture_to_destroy = p_pic;
 201
 202                     memset( p_pic->p[0].p_pixels, 0,
 203                             p_dec->p_info->sequence->width
 204                              * p_dec->p_info->sequence->height );
 205                     memset( p_pic->p[1].p_pixels, 0x80,
 206                             p_dec->p_info->sequence->width
 207                              * p_dec->p_info->sequence->height / 4 );
 208                     memset( p_pic->p[2].p_pixels, 0x80,
 209                             p_dec->p_info->sequence->width
 210                              * p_dec->p_info->sequence->height / 4 );
 211
 212                     if ( p_dec->b_slice_i )
 213                     {
 214                         vout_SynchroNewPicture( p_dec->p_synchro,
 215                             I_CODING_TYPE, 2, 0, 0, p_dec->i_current_rate );
 216                         vout_SynchroDecode( p_dec->p_synchro );
 217                         vout_SynchroEnd( p_dec->p_synchro, I_CODING_TYPE, 0 );
 218                     }
 219                 }
 220
 221                 if( p_dec->p_pes->i_pts )
 222                 {
 223                     mpeg2_pts( p_dec->p_mpeg2dec,
 224                                (uint32_t)p_dec->p_pes->i_pts );
 225                     p_dec->i_previous_pts = p_dec->i_current_pts;
 226                     p_dec->i_current_pts = p_dec->p_pes->i_pts;
 227                 }
 228
 229                 p_dec->i_current_rate = p_dec->p_pes->i_rate;
 230                 p_data = p_dec->p_pes->p_first;
 231             }
 232
 233             if( p_data != NULL )
 234             {
 235                 mpeg2_buffer( p_dec->p_mpeg2dec,
 236                               p_data->p_payload_start,
 237                               p_data->p_payload_end );
 238
 239                 p_data = p_data->p_next;
 240             }
 241             break;
 242
 243         case STATE_SEQUENCE:
 244         {
 245             /* Initialize video output */
 246             uint8_t *buf[3];
 247             buf[0] = buf[1] = buf[2] = NULL;
 248
 249             /* Check whether the input gives a particular aspect ratio */
 250             if( p_dec->p_fifo->p_demux_data
 251                 && ( *(int*)(p_dec->p_fifo->p_demux_data) & 0x7 ) )
 252             {
 253                 i_aspect = *(int*)(p_dec->p_fifo->p_demux_data);
 254                 switch( i_aspect )
 255                 {
 256                 case AR_3_4_PICTURE:
 257                     i_aspect = VOUT_ASPECT_FACTOR * 4 / 3;
 258                     break;
 259                 case AR_16_9_PICTURE:
 260                     i_aspect = VOUT_ASPECT_FACTOR * 16 / 9;
 261                     break;
 262                 case AR_221_1_PICTURE:
 263                     i_aspect = VOUT_ASPECT_FACTOR * 221 / 100;
 264                     break;
 265                 case AR_SQUARE_PICTURE:
 266                 default:
 267                     i_aspect = VOUT_ASPECT_FACTOR *
 268                                    p_dec->p_info->sequence->width /
 269                                    p_dec->p_info->sequence->height;
 270                     break;
 271                 }
 272             }
 273             else
 274             {
 275                 /* Use the value provided in the MPEG sequence header */
 276                 i_aspect = ((uint64_t)p_dec->p_info->sequence->display_width) *
 277                     p_dec->p_info->sequence->pixel_width * VOUT_ASPECT_FACTOR /
 278                     p_dec->p_info->sequence->display_height /
 279                     p_dec->p_info->sequence->pixel_height;
 280             }
 281
 282             i_chroma = VLC_FOURCC('Y','V','1','2');
 283
 284             p_dec->p_vout = vout_Request( p_dec->p_fifo, p_dec->p_vout,
 285                                           p_dec->p_info->sequence->width,
 286                                           p_dec->p_info->sequence->height,
 287                                           i_chroma, i_aspect );
 288
 289             msg_Dbg( p_dec->p_fifo, "%dx%d, aspect %d, %u.%03u fps",
 290                      p_dec->p_info->sequence->width,
 291                      p_dec->p_info->sequence->height, i_aspect,
 292                      (u32)((u64)1001000000 * 27 / p_dec->p_info->sequence->frame_period / 1001),
 293                      (u32)((u64)1001000000 * 27 / p_dec->p_info->sequence->frame_period % 1001) );
 294
 295             mpeg2_custom_fbuf( p_dec->p_mpeg2dec, 1 );
 296
 297             /* Set the first 2 reference frames */
 298             mpeg2_set_buf( p_dec->p_mpeg2dec, buf, NULL );
 299
 300             if( (p_pic = GetNewPicture( p_dec, buf )) == NULL ) break;
 301             memset( p_pic->p[0].p_pixels, 0,
 302                     p_dec->p_info->sequence->width
 303                      * p_dec->p_info->sequence->height );
 304             memset( p_pic->p[1].p_pixels, 0x80,
 305                     p_dec->p_info->sequence->width
 306                      * p_dec->p_info->sequence->height / 4 );
 307             memset( p_pic->p[2].p_pixels, 0x80,
 308                     p_dec->p_info->sequence->width
 309                      * p_dec->p_info->sequence->height / 4 );
 310             mpeg2_set_buf( p_dec->p_mpeg2dec, buf, p_pic );
 311             /* This picture will never go through display_picture. */
 312             vout_DatePicture( p_dec->p_vout, p_pic, 0 );
 313             vout_DisplayPicture( p_dec->p_vout, p_pic );
 314             /* For some reason, libmpeg2 will put this pic twice in
 315              * discard_picture. This can be considered a bug in libmpeg2. */
 316             vout_LinkPicture( p_dec->p_vout, p_pic );
 317
 318             if ( p_dec->p_synchro )
 319             {
 320                 vout_SynchroRelease( p_dec->p_synchro );
 321             }
 322             p_dec->p_synchro = vout_SynchroInit( p_dec->p_fifo, p_dec->p_vout,
 323                 (u32)((u64)1001000000 * 27 / p_dec->p_info->sequence->frame_period) );
 324             p_dec->b_after_sequence_header = 1;
 325         }
 326         break;
 327
 328         case STATE_PICTURE_2ND:
 329             vout_SynchroNewPicture( p_dec->p_synchro,
 330                 p_dec->p_info->current_picture->flags & PIC_MASK_CODING_TYPE,
 331                 p_dec->p_info->current_picture->nb_fields,
 332                 0, 0,
 333                 p_dec->i_current_rate );
 334
 335             if ( p_dec->b_skip )
 336             {
 337                 vout_SynchroTrash( p_dec->p_synchro );
 338             }
 339             else
 340             {
 341                 vout_SynchroDecode( p_dec->p_synchro );
 342             }
 343             break;
 344
 345         case STATE_PICTURE:
 346         {
 347             uint8_t *buf[3];
 348             buf[0] = buf[1] = buf[2] = NULL;
 349
 350             if ( p_dec->b_after_sequence_header
 351                   && ((p_dec->p_info->current_picture->flags
 352                         & PIC_MASK_CODING_TYPE)
 353                        == PIC_FLAG_CODING_TYPE_P) )
 354             {
 355                 /* Intra-slice refresh. Simulate a blank I picture. */
 356                 msg_Dbg( p_dec->p_fifo, "intra-slice refresh stream" );
 357                 vout_SynchroNewPicture( p_dec->p_synchro,
 358                     I_CODING_TYPE, 2, 0, 0, p_dec->i_current_rate );
 359                 vout_SynchroDecode( p_dec->p_synchro );
 360                 vout_SynchroEnd( p_dec->p_synchro, I_CODING_TYPE, 0 );
 361                 p_dec->b_slice_i = 1;
 362             }
 363             p_dec->b_after_sequence_header = 0;
 364
 365             vout_SynchroNewPicture( p_dec->p_synchro,
 366                 p_dec->p_info->current_picture->flags & PIC_MASK_CODING_TYPE,
 367                 p_dec->p_info->current_picture->nb_fields,
 368                 (p_dec->p_info->current_picture->flags & PIC_FLAG_PTS) ?
 369                     ( (p_dec->p_info->current_picture->pts ==
 370                                 (uint32_t)p_dec->i_current_pts) ?
 371                               p_dec->i_current_pts : p_dec->i_previous_pts ) : 0,
 372                 0,
 373                 p_dec->i_current_rate );
 374
 375             if ( !(p_dec->b_slice_i
 376                    && ((p_dec->p_info->current_picture->flags
 377                          & PIC_MASK_CODING_TYPE) == P_CODING_TYPE))
 378                    && !vout_SynchroChoose( p_dec->p_synchro,
 379                               p_dec->p_info->current_picture->flags
 380                                 & PIC_MASK_CODING_TYPE ) )
 381             {
 382                 mpeg2_skip( p_dec->p_mpeg2dec, 1 );
 383                 p_dec->b_skip = 1;
 384                 vout_SynchroTrash( p_dec->p_synchro );
 385                 mpeg2_set_buf( p_dec->p_mpeg2dec, buf, NULL );
 386             }
 387             else
 388             {
 389                 mpeg2_skip( p_dec->p_mpeg2dec, 0 );
 390                 p_dec->b_skip = 0;
 391                 vout_SynchroDecode( p_dec->p_synchro );
 392                 if( (p_pic = GetNewPicture( p_dec, buf )) == NULL ) break;
 393                 mpeg2_set_buf( p_dec->p_mpeg2dec, buf, p_pic );
 394             }
 395         }
 396         break;
 397
 398         case STATE_END:
 399         case STATE_SLICE:
 400             if( p_dec->p_info->display_fbuf
 401                 && p_dec->p_info->display_fbuf->id )
 402             {
 403                 p_pic = (picture_t *)p_dec->p_info->display_fbuf->id;
 404
 405                 vout_SynchroEnd( p_dec->p_synchro,
 406                             p_dec->p_info->display_picture->flags
 407                              & PIC_MASK_CODING_TYPE,
 408                             p_dec->b_garbage_pic );
 409                 p_dec->b_garbage_pic = 0;
 410                 vout_DisplayPicture( p_dec->p_vout, p_pic );
 411
 412                 if ( p_dec->p_picture_to_destroy != p_pic )
 413                 {
 414                     vout_DatePicture( p_dec->p_vout, p_pic,
 415                         vout_SynchroDate( p_dec->p_synchro ) );
 416                 }
 417                 else
 418                 {
 419                     p_dec->p_picture_to_destroy = NULL;
 420                     vout_DatePicture( p_dec->p_vout, p_pic, 0 );
 421                 }
 422             }
 423
 424             if( p_dec->p_info->discard_fbuf &&
 425                 p_dec->p_info->discard_fbuf->id )
 426             {
 427                 p_pic = (picture_t *)p_dec->p_info->discard_fbuf->id;
 428                 vout_UnlinkPicture( p_dec->p_vout, p_pic );
 429             }
 430             break;
 431
 432         case STATE_INVALID:
 433         {
 434             uint8_t *buf[3];
 435             buf[0] = buf[1] = buf[2] = NULL;
 436
 437             msg_Warn( p_dec->p_fifo, "invalid picture encountered" );
 438             if ( ( p_dec->p_info->current_picture == NULL ) ||
 439                ( ( p_dec->p_info->current_picture->flags & PIC_MASK_CODING_TYPE)
 440                   != B_CODING_TYPE ) )
 441             {
 442                 vout_SynchroReset( p_dec->p_synchro );
 443             }
 444             mpeg2_skip( p_dec->p_mpeg2dec, 1 );
 445             p_dec->b_skip = 1;
 446
 447             if( p_dec->p_info->current_fbuf &&
 448                 p_dec->p_info->current_fbuf->id )
 449             {
 450                 p_dec->b_garbage_pic = 1;
 451                 p_pic = p_dec->p_info->current_fbuf->id;
 452             }
 453             else
 454             {
 455                 if( (p_pic = GetNewPicture( p_dec, buf )) == NULL )
 456                     break;
 457                 mpeg2_set_buf( p_dec->p_mpeg2dec, buf, p_pic );
 458             }
 459             p_dec->p_picture_to_destroy = p_pic;
 460
 461             memset( p_pic->p[0].p_pixels, 0,
 462                     p_dec->p_info->sequence->width
 463                      * p_dec->p_info->sequence->height );
 464             memset( p_pic->p[1].p_pixels, 0x80,
 465                     p_dec->p_info->sequence->width
 466                      * p_dec->p_info->sequence->height / 4 );
 467             memset( p_pic->p[2].p_pixels, 0x80,
 468                     p_dec->p_info->sequence->width
 469                      * p_dec->p_info->sequence->height / 4 );
 470
 471             if ( p_dec->b_slice_i )
 472             {
 473                 vout_SynchroNewPicture( p_dec->p_synchro,
 474                             I_CODING_TYPE, 2, 0, 0, p_dec->i_current_rate );
 475                 vout_SynchroDecode( p_dec->p_synchro );
 476                 vout_SynchroEnd( p_dec->p_synchro, I_CODING_TYPE, 0 );
 477             }
 478             break;
 479         }
 480
 481         default:
 482             break;
 483         }
 484     }
 485
 486     /* If b_error is set, the libmpeg2 decoder thread enters the error loop */
 487     if( p_dec->p_fifo->b_error )
 488     {
 489         DecoderError( p_dec->p_fifo );
 490     }
 491
 492     /* End of the libmpeg2 decoder thread */
 493     CloseDecoder( p_dec );
 494
 495     return 0;
 496
 497  error:
 498     DecoderError( p_fifo );
 499     if( p_dec )
 500     {
 501         if( p_dec->p_fifo )
 502             p_dec->p_fifo->b_error = 1;
 503
 504         /* End of the libmpeg2 decoder thread */
 505         CloseDecoder( p_dec );
 506     }
 507
 508     return -1;
 509 }
 510
 511 /*****************************************************************************
 512  * CloseDecoder: libmpeg2 decoder destruction
 513  *****************************************************************************/
 514 static void CloseDecoder( dec_thread_t * p_dec )
 515 {
 516     if( p_dec )
 517     {
 518         int i_pic;
 519
 520         if( p_dec->p_pes )
 521             input_DeletePES( p_dec->p_fifo->p_packets_mgt, p_dec->p_pes );
 522
 523         if( p_dec->p_synchro )
 524             vout_SynchroRelease( p_dec->p_synchro );
 525
 526         if( p_dec->p_vout )
 527         {
 528             /* Temporary hack to free the pictures in use by libmpeg2 */
 529             for( i_pic = 0; i_pic < p_dec->p_vout->render.i_pictures; i_pic++ )
 530             {
 531                 if( p_dec->p_vout->render.pp_picture[i_pic]->i_status ==
 532                       RESERVED_PICTURE )
 533                     vout_DestroyPicture( p_dec->p_vout,
 534                                      p_dec->p_vout->render.pp_picture[i_pic] );
 535                 if( p_dec->p_vout->render.pp_picture[i_pic]->i_refcount > 0 )
 536                     vout_UnlinkPicture( p_dec->p_vout,
 537                                      p_dec->p_vout->render.pp_picture[i_pic] );
 538             }
 539
 540             vout_Request( p_dec->p_fifo, p_dec->p_vout, 0, 0, 0, 0 );
 541         }
 542
 543         if( p_dec->p_mpeg2dec ) mpeg2_close( p_dec->p_mpeg2dec );
 544
 545         free( p_dec );
 546     }
 547 }
 548
 549 /*****************************************************************************
 550  * GetNewPicture: Get a new picture from the vout and set the buf struct
 551  *****************************************************************************/
 552 static picture_t *GetNewPicture( dec_thread_t *p_dec, uint8_t **pp_buf )
 553 {
 554     picture_t *p_pic;
 555     vlc_bool_t b_progressive = p_dec->p_info->current_picture != NULL ?
 556         p_dec->p_info->current_picture->flags & PIC_FLAG_PROGRESSIVE_FRAME :
 557         1;
 558     vlc_bool_t b_top_field_first = p_dec->p_info->current_picture != NULL ?
 559         p_dec->p_info->current_picture->flags & PIC_FLAG_TOP_FIELD_FIRST :
 560         1;
 561     unsigned int i_nb_fields = p_dec->p_info->current_picture != NULL ?
 562         p_dec->p_info->current_picture->nb_fields : 2;
 563
 564     /* Get a new picture */
 565     while( !(p_pic = vout_CreatePicture( p_dec->p_vout,
 566         b_progressive, b_top_field_first, i_nb_fields )) )
 567     {
 568         if( p_dec->p_fifo->b_die || p_dec->p_fifo->b_error )
 569             break;
 570
 571         msleep( VOUT_OUTMEM_SLEEP );
 572     }
 573     if( p_pic == NULL )
 574         return NULL;
 575     vout_LinkPicture( p_dec->p_vout, p_pic );
 576
 577     pp_buf[0] = p_pic->p[0].p_pixels;
 578     pp_buf[1] = p_pic->p[1].p_pixels;
 579     pp_buf[2] = p_pic->p[2].p_pixels;
 580
 581     return p_pic;
 582 }