git.sesse.net Git - vlc/blob - src/video_output/vout_pictures.c

   1 /*****************************************************************************
   2  * vout_pictures.c : picture management functions
   3  *****************************************************************************
   4  * Copyright (C) 2000-2004 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Vincent Seguin <seguin@via.ecp.fr>
   8  *          Samuel Hocevar <sam@zoy.org>
   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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  23  *****************************************************************************/
  24
  25 /*****************************************************************************
  26  * Preamble
  27  *****************************************************************************/
  28
  29 #ifdef HAVE_CONFIG_H
  30 # include "config.h"
  31 #endif
  32
  33 #include <vlc_common.h>
  34 #include <vlc_vout.h>
  35 #include <vlc_osd.h>
  36 #include "vout_pictures.h"
  37
  38 #include <assert.h>
  39
  40 /**
  41  * Display a picture
  42  *
  43  * Remove the reservation flag of a picture, which will cause it to be ready
  44  * for display. The picture won't be displayed until vout_DatePicture has been
  45  * called.
  46  */
  47 void vout_DisplayPicture( vout_thread_t *p_vout, picture_t *p_pic )
  48 {
  49     vlc_mutex_lock( &p_vout->picture_lock );
  50     switch( p_pic->i_status )
  51     {
  52     case RESERVED_PICTURE:
  53         p_pic->i_status = RESERVED_DISP_PICTURE;
  54         break;
  55     case RESERVED_DATED_PICTURE:
  56         p_pic->i_status = READY_PICTURE;
  57         break;
  58     default:
  59         msg_Err( p_vout, "picture to display %p has invalid status %d",
  60                          p_pic, p_pic->i_status );
  61         break;
  62     }
  63
  64     vlc_mutex_unlock( &p_vout->picture_lock );
  65 }
  66
  67 /**
  68  * Date a picture
  69  *
  70  * Remove the reservation flag of a picture, which will cause it to be ready
  71  * for display. The picture won't be displayed until vout_DisplayPicture has
  72  * been called.
  73  * \param p_vout The vout in question
  74  * \param p_pic The picture to date
  75  * \param date The date to display the picture
  76  */
  77 void vout_DatePicture( vout_thread_t *p_vout,
  78                        picture_t *p_pic, mtime_t date )
  79 {
  80     vlc_mutex_lock( &p_vout->picture_lock );
  81     p_pic->date = date;
  82     switch( p_pic->i_status )
  83     {
  84     case RESERVED_PICTURE:
  85         p_pic->i_status = RESERVED_DATED_PICTURE;
  86         break;
  87     case RESERVED_DISP_PICTURE:
  88         p_pic->i_status = READY_PICTURE;
  89         break;
  90     default:
  91         msg_Err( p_vout, "picture to date %p has invalid status %d",
  92                          p_pic, p_pic->i_status );
  93         break;
  94     }
  95
  96     vlc_mutex_unlock( &p_vout->picture_lock );
  97 }
  98
  99 /**
 100  * Allocate a picture in the video output heap.
 101  *
 102  * This function creates a reserved image in the video output heap.
 103  * A null pointer is returned if the function fails. This method provides an
 104  * already allocated zone of memory in the picture data fields.
 105  * It needs locking since several pictures can be created by several producers
 106  * threads.
 107  */
 108 picture_t *vout_CreatePicture( vout_thread_t *p_vout,
 109                                bool b_progressive,
 110                                bool b_top_field_first,
 111                                unsigned int i_nb_fields )
 112 {
 113     int         i_pic;                                      /* picture index */
 114     picture_t * p_pic;
 115     picture_t * p_freepic = NULL;                      /* first free picture */
 116
 117     /* Get lock */
 118     vlc_mutex_lock( &p_vout->picture_lock );
 119
 120     /*
 121      * Look for an empty place in the picture heap.
 122      */
 123     for( i_pic = 0; i_pic < I_RENDERPICTURES; i_pic++ )
 124     {
 125         p_pic = PP_RENDERPICTURE[(p_vout->render.i_last_used_pic + i_pic + 1)
 126                                  % I_RENDERPICTURES];
 127
 128         switch( p_pic->i_status )
 129         {
 130             case DESTROYED_PICTURE:
 131                 /* Memory will not be reallocated, and function can end
 132                  * immediately - this is the best possible case, since no
 133                  * memory allocation needs to be done */
 134                 p_pic->i_status   = RESERVED_PICTURE;
 135                 p_pic->i_refcount = 0;
 136                 p_pic->b_force    = 0;
 137
 138                 p_pic->b_progressive        = b_progressive;
 139                 p_pic->i_nb_fields          = i_nb_fields;
 140                 p_pic->b_top_field_first    = b_top_field_first;
 141
 142                 p_vout->i_heap_size++;
 143                 p_vout->render.i_last_used_pic =
 144                     ( p_vout->render.i_last_used_pic + i_pic + 1 )
 145                     % I_RENDERPICTURES;
 146                 vlc_mutex_unlock( &p_vout->picture_lock );
 147                 return( p_pic );
 148
 149             case FREE_PICTURE:
 150                 /* Picture is empty and ready for allocation */
 151                 p_vout->render.i_last_used_pic =
 152                     ( p_vout->render.i_last_used_pic + i_pic + 1 )
 153                     % I_RENDERPICTURES;
 154                 p_freepic = p_pic;
 155                 break;
 156
 157             default:
 158                 break;
 159         }
 160     }
 161
 162     /*
 163      * Prepare picture
 164      */
 165     if( p_freepic != NULL )
 166     {
 167         vout_AllocatePicture( VLC_OBJECT(p_vout),
 168                               p_freepic, p_vout->render.i_chroma,
 169                               p_vout->render.i_width, p_vout->render.i_height,
 170                               p_vout->render.i_aspect );
 171
 172         if( p_freepic->i_planes )
 173         {
 174             /* Copy picture information, set some default values */
 175             p_freepic->i_status   = RESERVED_PICTURE;
 176             p_freepic->i_type     = MEMORY_PICTURE;
 177             p_freepic->b_slow     = 0;
 178
 179             p_freepic->i_refcount = 0;
 180             p_freepic->b_force = 0;
 181
 182             p_freepic->b_progressive        = b_progressive;
 183             p_freepic->i_nb_fields          = i_nb_fields;
 184             p_freepic->b_top_field_first    = b_top_field_first;
 185
 186             p_freepic->i_matrix_coefficients = 1;
 187
 188             p_vout->i_heap_size++;
 189         }
 190         else
 191         {
 192             /* Memory allocation failed : set picture as empty */
 193             p_freepic->i_status = FREE_PICTURE;
 194             p_freepic = NULL;
 195
 196             msg_Err( p_vout, "picture allocation failed" );
 197         }
 198
 199         vlc_mutex_unlock( &p_vout->picture_lock );
 200
 201         return( p_freepic );
 202     }
 203
 204     /* No free or destroyed picture could be found, but the decoder
 205      * will try again in a while. */
 206     vlc_mutex_unlock( &p_vout->picture_lock );
 207
 208     return( NULL );
 209 }
 210
 211 /**
 212  * Remove a permanent or reserved picture from the heap
 213  *
 214  * This function frees a previously reserved picture or a permanent
 215  * picture. It is meant to be used when the construction of a picture aborted.
 216  * Note that the picture will be destroyed even if it is linked !
 217  */
 218 void vout_DestroyPicture( vout_thread_t *p_vout, picture_t *p_pic )
 219 {
 220     vlc_mutex_lock( &p_vout->picture_lock );
 221
 222 #ifndef NDEBUG
 223     /* Check if picture status is valid */
 224     if( (p_pic->i_status != RESERVED_PICTURE) &&
 225         (p_pic->i_status != RESERVED_DATED_PICTURE) &&
 226         (p_pic->i_status != RESERVED_DISP_PICTURE) )
 227     {
 228         msg_Err( p_vout, "picture to destroy %p has invalid status %d",
 229                          p_pic, p_pic->i_status );
 230     }
 231 #endif
 232
 233     p_pic->i_status = DESTROYED_PICTURE;
 234     p_vout->i_heap_size--;
 235
 236     vlc_mutex_unlock( &p_vout->picture_lock );
 237 }
 238
 239 /**
 240  * Increment reference counter of a picture
 241  *
 242  * This function increments the reference counter of a picture in the video
 243  * heap. It needs a lock since several producer threads can access the picture.
 244  */
 245 void vout_LinkPicture( vout_thread_t *p_vout, picture_t *p_pic )
 246 {
 247     vlc_mutex_lock( &p_vout->picture_lock );
 248     p_pic->i_refcount++;
 249     vlc_mutex_unlock( &p_vout->picture_lock );
 250 }
 251
 252 /**
 253  * Decrement reference counter of a picture
 254  *
 255  * This function decrement the reference counter of a picture in the video heap
 256  */
 257 void vout_UnlinkPicture( vout_thread_t *p_vout, picture_t *p_pic )
 258 {
 259     vlc_mutex_lock( &p_vout->picture_lock );
 260     p_pic->i_refcount--;
 261
 262     if( ( p_pic->i_refcount == 0 ) &&
 263         ( p_pic->i_status == DISPLAYED_PICTURE ) )
 264     {
 265         p_pic->i_status = DESTROYED_PICTURE;
 266         p_vout->i_heap_size--;
 267     }
 268
 269     vlc_mutex_unlock( &p_vout->picture_lock );
 270 }
 271
 272 /**
 273  * Render a picture
 274  *
 275  * This function chooses whether the current picture needs to be copied
 276  * before rendering, does the subpicture magic, and tells the video output
 277  * thread which direct buffer needs to be displayed.
 278  */
 279 picture_t * vout_RenderPicture( vout_thread_t *p_vout, picture_t *p_pic,
 280                                                        subpicture_t *p_subpic )
 281 {
 282     int i_scale_width, i_scale_height;
 283
 284     if( p_pic == NULL )
 285     {
 286         /* XXX: subtitles */
 287         return NULL;
 288     }
 289
 290     i_scale_width = p_vout->fmt_out.i_visible_width * 1000 /
 291         p_vout->fmt_in.i_visible_width;
 292     i_scale_height = p_vout->fmt_out.i_visible_height * 1000 /
 293         p_vout->fmt_in.i_visible_height;
 294
 295     if( p_pic->i_type == DIRECT_PICTURE )
 296     {
 297         if( !p_vout->render.b_allow_modify_pics || p_pic->i_refcount ||
 298             p_pic->b_force )
 299         {
 300             /* Picture is in a direct buffer and is still in use,
 301              * we need to copy it to another direct buffer before
 302              * displaying it if there are subtitles. */
 303             if( p_subpic != NULL )
 304             {
 305                 /* We have subtitles. First copy the picture to
 306                  * the spare direct buffer, then render the
 307                  * subtitles. */
 308                 vout_CopyPicture( p_vout, PP_OUTPUTPICTURE[0], p_pic );
 309
 310                 spu_RenderSubpictures( p_vout->p_spu, &p_vout->fmt_out,
 311                                        PP_OUTPUTPICTURE[0], p_pic, p_subpic,
 312                                        i_scale_width, i_scale_height );
 313
 314                 return PP_OUTPUTPICTURE[0];
 315             }
 316
 317             /* No subtitles, picture is in a directbuffer so
 318              * we can display it directly even if it is still
 319              * in use. */
 320             return p_pic;
 321         }
 322
 323         /* Picture is in a direct buffer but isn't used by the
 324          * decoder. We can safely render subtitles on it and
 325          * display it. */
 326         spu_RenderSubpictures( p_vout->p_spu, &p_vout->fmt_out, p_pic, p_pic,
 327                                p_subpic, i_scale_width, i_scale_height );
 328
 329         return p_pic;
 330     }
 331
 332     /* Not a direct buffer. We either need to copy it to a direct buffer,
 333      * or render it if the chroma isn't the same. */
 334     if( p_vout->b_direct )
 335     {
 336         /* Picture is not in a direct buffer, but is exactly the
 337          * same size as the direct buffers. A memcpy() is enough,
 338          * then render the subtitles. */
 339
 340         if( PP_OUTPUTPICTURE[0]->pf_lock )
 341             if( PP_OUTPUTPICTURE[0]->pf_lock( p_vout, PP_OUTPUTPICTURE[0] ) )
 342                 return NULL;
 343
 344         vout_CopyPicture( p_vout, PP_OUTPUTPICTURE[0], p_pic );
 345         spu_RenderSubpictures( p_vout->p_spu, &p_vout->fmt_out,
 346                                PP_OUTPUTPICTURE[0], p_pic,
 347                                p_subpic, i_scale_width, i_scale_height );
 348
 349         if( PP_OUTPUTPICTURE[0]->pf_unlock )
 350             PP_OUTPUTPICTURE[0]->pf_unlock( p_vout, PP_OUTPUTPICTURE[0] );
 351
 352         return PP_OUTPUTPICTURE[0];
 353     }
 354
 355     /* Picture is not in a direct buffer, and needs to be converted to
 356      * another size/chroma. Then the subtitles need to be rendered as
 357      * well. This usually means software YUV, or hardware YUV with a
 358      * different chroma. */
 359
 360     if( p_subpic != NULL && p_vout->p_picture[0].b_slow )
 361     {
 362         /* The picture buffer is in slow memory. We'll use
 363          * the "2 * VOUT_MAX_PICTURES + 1" picture as a temporary
 364          * one for subpictures rendering. */
 365         picture_t *p_tmp_pic = &p_vout->p_picture[2 * VOUT_MAX_PICTURES];
 366         if( p_tmp_pic->i_status == FREE_PICTURE )
 367         {
 368             vout_AllocatePicture( VLC_OBJECT(p_vout),
 369                                   p_tmp_pic, p_vout->fmt_out.i_chroma,
 370                                   p_vout->fmt_out.i_width,
 371                                   p_vout->fmt_out.i_height,
 372                                   p_vout->fmt_out.i_aspect );
 373             p_tmp_pic->i_type = MEMORY_PICTURE;
 374             p_tmp_pic->i_status = RESERVED_PICTURE;
 375             /* some modules (such as blend)  needs to know the extra information in picture heap */
 376             p_tmp_pic->p_heap = &p_vout->output;
 377         }
 378
 379         /* Convert image to the first direct buffer */
 380         p_vout->chroma.pf_convert( p_vout, p_pic, p_tmp_pic );
 381
 382         /* Render subpictures on the first direct buffer */
 383         spu_RenderSubpictures( p_vout->p_spu, &p_vout->fmt_out, p_tmp_pic,
 384                                p_tmp_pic, p_subpic,
 385                                i_scale_width, i_scale_height );
 386
 387         if( p_vout->p_picture[0].pf_lock )
 388             if( p_vout->p_picture[0].pf_lock( p_vout, &p_vout->p_picture[0] ) )
 389                 return NULL;
 390
 391         vout_CopyPicture( p_vout, &p_vout->p_picture[0], p_tmp_pic );
 392     }
 393     else
 394     {
 395         if( p_vout->p_picture[0].pf_lock )
 396             if( p_vout->p_picture[0].pf_lock( p_vout, &p_vout->p_picture[0] ) )
 397                 return NULL;
 398
 399         /* Convert image to the first direct buffer */
 400         p_vout->chroma.pf_convert( p_vout, p_pic, &p_vout->p_picture[0] );
 401
 402         /* Render subpictures on the first direct buffer */
 403         spu_RenderSubpictures( p_vout->p_spu, &p_vout->fmt_out,
 404                                &p_vout->p_picture[0], &p_vout->p_picture[0],
 405                                p_subpic, i_scale_width, i_scale_height );
 406     }
 407
 408     if( p_vout->p_picture[0].pf_unlock )
 409         p_vout->p_picture[0].pf_unlock( p_vout, &p_vout->p_picture[0] );
 410
 411     return &p_vout->p_picture[0];
 412 }
 413
 414 /**
 415  * Calculate image window coordinates
 416  *
 417  * This function will be accessed by plugins. It calculates the relative
 418  * position of the output window and the image window.
 419  */
 420 void vout_PlacePicture( vout_thread_t *p_vout,
 421                         unsigned int i_width, unsigned int i_height,
 422                         unsigned int *pi_x, unsigned int *pi_y,
 423                         unsigned int *pi_width, unsigned int *pi_height )
 424 {
 425     if( (i_width <= 0) || (i_height <=0) )
 426     {
 427         *pi_width = *pi_height = *pi_x = *pi_y = 0;
 428         return;
 429     }
 430
 431     if( p_vout->b_scale )
 432     {
 433         *pi_width = i_width;
 434         *pi_height = i_height;
 435     }
 436     else
 437     {
 438         *pi_width = __MIN( i_width, p_vout->fmt_in.i_visible_width );
 439         *pi_height = __MIN( i_height, p_vout->fmt_in.i_visible_height );
 440     }
 441
 442     if( p_vout->fmt_in.i_visible_width * (int64_t)p_vout->fmt_in.i_sar_num *
 443         *pi_height / p_vout->fmt_in.i_visible_height /
 444         p_vout->fmt_in.i_sar_den > *pi_width )
 445     {
 446         *pi_height = p_vout->fmt_in.i_visible_height *
 447             (int64_t)p_vout->fmt_in.i_sar_den * *pi_width /
 448             p_vout->fmt_in.i_visible_width / p_vout->fmt_in.i_sar_num;
 449     }
 450     else
 451     {
 452         *pi_width = p_vout->fmt_in.i_visible_width *
 453             (int64_t)p_vout->fmt_in.i_sar_num * *pi_height /
 454             p_vout->fmt_in.i_visible_height / p_vout->fmt_in.i_sar_den;
 455     }
 456
 457     switch( p_vout->i_alignment & VOUT_ALIGN_HMASK )
 458     {
 459     case VOUT_ALIGN_LEFT:
 460         *pi_x = 0;
 461         break;
 462     case VOUT_ALIGN_RIGHT:
 463         *pi_x = i_width - *pi_width;
 464         break;
 465     default:
 466         *pi_x = ( i_width - *pi_width ) / 2;
 467     }
 468
 469     switch( p_vout->i_alignment & VOUT_ALIGN_VMASK )
 470     {
 471     case VOUT_ALIGN_TOP:
 472         *pi_y = 0;
 473         break;
 474     case VOUT_ALIGN_BOTTOM:
 475         *pi_y = i_height - *pi_height;
 476         break;
 477     default:
 478         *pi_y = ( i_height - *pi_height ) / 2;
 479     }
 480 }
 481
 482 /**
 483  * Allocate a new picture in the heap.
 484  *
 485  * This function allocates a fake direct buffer in memory, which can be
 486  * used exactly like a video buffer. The video output thread then manages
 487  * how it gets displayed.
 488  */
 489 int __vout_AllocatePicture( vlc_object_t *p_this, picture_t *p_pic,
 490                             vlc_fourcc_t i_chroma,
 491                             int i_width, int i_height, int i_aspect )
 492 {
 493     int i_bytes, i_index, i_width_aligned, i_height_aligned;
 494
 495     /* Make sure the real dimensions are a multiple of 16 */
 496     i_width_aligned = (i_width + 15) >> 4 << 4;
 497     i_height_aligned = (i_height + 15) >> 4 << 4;
 498
 499     if( vout_InitPicture( p_this, p_pic, i_chroma,
 500                           i_width, i_height, i_aspect ) != VLC_SUCCESS )
 501     {
 502         p_pic->i_planes = 0;
 503         return VLC_EGENERIC;
 504     }
 505
 506     /* Calculate how big the new image should be */
 507     i_bytes = p_pic->format.i_bits_per_pixel *
 508         i_width_aligned * i_height_aligned / 8;
 509
 510     p_pic->p_data = vlc_memalign( &p_pic->p_data_orig, 16, i_bytes );
 511
 512     if( p_pic->p_data == NULL )
 513     {
 514         p_pic->i_planes = 0;
 515         return VLC_EGENERIC;
 516     }
 517
 518     /* Fill the p_pixels field for each plane */
 519     p_pic->p[ 0 ].p_pixels = p_pic->p_data;
 520
 521     for( i_index = 1; i_index < p_pic->i_planes; i_index++ )
 522     {
 523         p_pic->p[i_index].p_pixels = p_pic->p[i_index-1].p_pixels +
 524             p_pic->p[i_index-1].i_lines * p_pic->p[i_index-1].i_pitch;
 525     }
 526
 527     return VLC_SUCCESS;
 528 }
 529
 530 /**
 531  * Initialise the video format fields given chroma/size.
 532  *
 533  * This function initializes all the video_frame_format_t fields given the
 534  * static properties of a picture (chroma and size).
 535  * \param p_format Pointer to the format structure to initialize
 536  * \param i_chroma Chroma to set
 537  * \param i_width Width to set
 538  * \param i_height Height to set
 539  * \param i_aspect Aspect ratio
 540  */
 541 void vout_InitFormat( video_frame_format_t *p_format, vlc_fourcc_t i_chroma,
 542                       int i_width, int i_height, int i_aspect )
 543 {
 544     p_format->i_chroma   = i_chroma;
 545     p_format->i_width    = p_format->i_visible_width  = i_width;
 546     p_format->i_height   = p_format->i_visible_height = i_height;
 547     p_format->i_x_offset = p_format->i_y_offset = 0;
 548     p_format->i_aspect   = i_aspect;
 549
 550 #if 0
 551     /* Assume we have square pixels */
 552     if( i_width && i_height )
 553         p_format->i_aspect = i_width * VOUT_ASPECT_FACTOR / i_height;
 554     else
 555         p_format->i_aspect = 0;
 556 #endif
 557
 558     switch( i_chroma )
 559     {
 560         case FOURCC_YUVA:
 561             p_format->i_bits_per_pixel = 32;
 562             break;
 563         case FOURCC_I444:
 564         case FOURCC_J444:
 565             p_format->i_bits_per_pixel = 24;
 566             break;
 567         case FOURCC_I422:
 568         case FOURCC_YUY2:
 569         case FOURCC_UYVY:
 570         case FOURCC_J422:
 571             p_format->i_bits_per_pixel = 16;
 572             break;
 573         case FOURCC_I411:
 574         case FOURCC_YV12:
 575         case FOURCC_I420:
 576         case FOURCC_J420:
 577         case FOURCC_IYUV:
 578             p_format->i_bits_per_pixel = 12;
 579             break;
 580         case FOURCC_I410:
 581         case FOURCC_YVU9:
 582             p_format->i_bits_per_pixel = 9;
 583             break;
 584         case FOURCC_Y211:
 585             p_format->i_bits_per_pixel = 8;
 586             break;
 587         case FOURCC_YUVP:
 588             p_format->i_bits_per_pixel = 8;
 589             break;
 590
 591         case FOURCC_RV32:
 592         case FOURCC_RGBA:
 593             p_format->i_bits_per_pixel = 32;
 594             break;
 595         case FOURCC_RV24:
 596             p_format->i_bits_per_pixel = 24;
 597             break;
 598         case FOURCC_RV15:
 599         case FOURCC_RV16:
 600             p_format->i_bits_per_pixel = 16;
 601             break;
 602         case FOURCC_RGB2:
 603             p_format->i_bits_per_pixel = 8;
 604             break;
 605
 606         case FOURCC_GREY:
 607             p_format->i_bits_per_pixel = 8;
 608             break;
 609
 610         default:
 611             p_format->i_bits_per_pixel = 0;
 612             break;
 613     }
 614 }
 615
 616 /**
 617  * Initialise the picture_t fields given chroma/size.
 618  *
 619  * This function initializes most of the picture_t fields given a chroma and
 620  * size. It makes the assumption that stride == width.
 621  * \param p_this The calling object
 622  * \param p_pic Pointer to the picture to initialize
 623  * \param i_chroma The chroma fourcc to set
 624  * \param i_width The width of the picture
 625  * \param i_height The height of the picture
 626  * \param i_aspect The aspect ratio of the picture
 627  */
 628 int __vout_InitPicture( vlc_object_t *p_this, picture_t *p_pic,
 629                         vlc_fourcc_t i_chroma,
 630                         int i_width, int i_height, int i_aspect )
 631 {
 632     int i_index, i_width_aligned, i_height_aligned;
 633
 634     /* Store default values */
 635     for( i_index = 0; i_index < VOUT_MAX_PLANES; i_index++ )
 636     {
 637         p_pic->p[i_index].p_pixels = NULL;
 638         p_pic->p[i_index].i_pixel_pitch = 1;
 639     }
 640
 641     p_pic->pf_release = 0;
 642     p_pic->pf_lock = 0;
 643     p_pic->pf_unlock = 0;
 644     p_pic->i_refcount = 0;
 645
 646     vout_InitFormat( &p_pic->format, i_chroma, i_width, i_height, i_aspect );
 647
 648     /* Make sure the real dimensions are a multiple of 16 */
 649     i_width_aligned = (i_width + 15) >> 4 << 4;
 650     i_height_aligned = (i_height + 15) >> 4 << 4;
 651
 652     /* Calculate coordinates */
 653     switch( i_chroma )
 654     {
 655         case FOURCC_I411:
 656             p_pic->p[ Y_PLANE ].i_lines = i_height_aligned;
 657             p_pic->p[ Y_PLANE ].i_visible_lines = i_height;
 658             p_pic->p[ Y_PLANE ].i_pitch = i_width_aligned;
 659             p_pic->p[ Y_PLANE ].i_visible_pitch = i_width;
 660             p_pic->p[ U_PLANE ].i_lines = i_height_aligned;
 661             p_pic->p[ U_PLANE ].i_visible_lines = i_height;
 662             p_pic->p[ U_PLANE ].i_pitch = i_width_aligned / 4;
 663             p_pic->p[ U_PLANE ].i_visible_pitch = i_width / 4;
 664             p_pic->p[ V_PLANE ].i_lines = i_height_aligned;
 665             p_pic->p[ V_PLANE ].i_visible_lines = i_height;
 666             p_pic->p[ V_PLANE ].i_pitch = i_width_aligned / 4;
 667             p_pic->p[ V_PLANE ].i_visible_pitch = i_width / 4;
 668             p_pic->i_planes = 3;
 669             break;
 670
 671         case FOURCC_I410:
 672         case FOURCC_YVU9:
 673             p_pic->p[ Y_PLANE ].i_lines = i_height_aligned;
 674             p_pic->p[ Y_PLANE ].i_visible_lines = i_height;
 675             p_pic->p[ Y_PLANE ].i_pitch = i_width_aligned;
 676             p_pic->p[ Y_PLANE ].i_visible_pitch = i_width;
 677             p_pic->p[ U_PLANE ].i_lines = i_height_aligned / 4;
 678             p_pic->p[ U_PLANE ].i_visible_lines = i_height / 4;
 679             p_pic->p[ U_PLANE ].i_pitch = i_width_aligned / 4;
 680             p_pic->p[ U_PLANE ].i_visible_pitch = i_width / 4;
 681             p_pic->p[ V_PLANE ].i_lines = i_height_aligned / 4;
 682             p_pic->p[ V_PLANE ].i_visible_lines = i_height / 4;
 683             p_pic->p[ V_PLANE ].i_pitch = i_width_aligned / 4;
 684             p_pic->p[ V_PLANE ].i_visible_pitch = i_width / 4;
 685             p_pic->i_planes = 3;
 686             break;
 687
 688         case FOURCC_YV12:
 689         case FOURCC_I420:
 690         case FOURCC_IYUV:
 691         case FOURCC_J420:
 692             p_pic->p[ Y_PLANE ].i_lines = i_height_aligned;
 693             p_pic->p[ Y_PLANE ].i_visible_lines = i_height;
 694             p_pic->p[ Y_PLANE ].i_pitch = i_width_aligned;
 695             p_pic->p[ Y_PLANE ].i_visible_pitch = i_width;
 696             p_pic->p[ U_PLANE ].i_lines = i_height_aligned / 2;
 697             p_pic->p[ U_PLANE ].i_visible_lines = i_height / 2;
 698             p_pic->p[ U_PLANE ].i_pitch = i_width_aligned / 2;
 699             p_pic->p[ U_PLANE ].i_visible_pitch = i_width / 2;
 700             p_pic->p[ V_PLANE ].i_lines = i_height_aligned / 2;
 701             p_pic->p[ V_PLANE ].i_visible_lines = i_height / 2;
 702             p_pic->p[ V_PLANE ].i_pitch = i_width_aligned / 2;
 703             p_pic->p[ V_PLANE ].i_visible_pitch = i_width / 2;
 704             p_pic->i_planes = 3;
 705             break;
 706
 707         case FOURCC_I422:
 708         case FOURCC_J422:
 709             p_pic->p[ Y_PLANE ].i_lines = i_height_aligned;
 710             p_pic->p[ Y_PLANE ].i_visible_lines = i_height;
 711             p_pic->p[ Y_PLANE ].i_pitch = i_width_aligned;
 712             p_pic->p[ Y_PLANE ].i_visible_pitch = i_width;
 713             p_pic->p[ U_PLANE ].i_lines = i_height_aligned;
 714             p_pic->p[ U_PLANE ].i_visible_lines = i_height;
 715             p_pic->p[ U_PLANE ].i_pitch = i_width_aligned / 2;
 716             p_pic->p[ U_PLANE ].i_visible_pitch = i_width / 2;
 717             p_pic->p[ V_PLANE ].i_lines = i_height_aligned;
 718             p_pic->p[ V_PLANE ].i_visible_lines = i_height;
 719             p_pic->p[ V_PLANE ].i_pitch = i_width_aligned / 2;
 720             p_pic->p[ V_PLANE ].i_visible_pitch = i_width / 2;
 721             p_pic->i_planes = 3;
 722             break;
 723
 724         case FOURCC_I444:
 725         case FOURCC_J444:
 726             p_pic->p[ Y_PLANE ].i_lines = i_height_aligned;
 727             p_pic->p[ Y_PLANE ].i_visible_lines = i_height;
 728             p_pic->p[ Y_PLANE ].i_pitch = i_width_aligned;
 729             p_pic->p[ Y_PLANE ].i_visible_pitch = i_width;
 730             p_pic->p[ U_PLANE ].i_lines = i_height_aligned;
 731             p_pic->p[ U_PLANE ].i_visible_lines = i_height;
 732             p_pic->p[ U_PLANE ].i_pitch = i_width_aligned;
 733             p_pic->p[ U_PLANE ].i_visible_pitch = i_width;
 734             p_pic->p[ V_PLANE ].i_lines = i_height_aligned;
 735             p_pic->p[ V_PLANE ].i_visible_lines = i_height;
 736             p_pic->p[ V_PLANE ].i_pitch = i_width_aligned;
 737             p_pic->p[ V_PLANE ].i_visible_pitch = i_width;
 738             p_pic->i_planes = 3;
 739             break;
 740
 741         case FOURCC_YUVA:
 742             p_pic->p[ Y_PLANE ].i_lines = i_height_aligned;
 743             p_pic->p[ Y_PLANE ].i_visible_lines = i_height;
 744             p_pic->p[ Y_PLANE ].i_pitch = i_width_aligned;
 745             p_pic->p[ Y_PLANE ].i_visible_pitch = i_width;
 746             p_pic->p[ U_PLANE ].i_lines = i_height_aligned;
 747             p_pic->p[ U_PLANE ].i_visible_lines = i_height;
 748             p_pic->p[ U_PLANE ].i_pitch = i_width_aligned;
 749             p_pic->p[ U_PLANE ].i_visible_pitch = i_width;
 750             p_pic->p[ V_PLANE ].i_lines = i_height_aligned;
 751             p_pic->p[ V_PLANE ].i_visible_lines = i_height;
 752             p_pic->p[ V_PLANE ].i_pitch = i_width_aligned;
 753             p_pic->p[ V_PLANE ].i_visible_pitch = i_width;
 754             p_pic->p[ A_PLANE ].i_lines = i_height_aligned;
 755             p_pic->p[ A_PLANE ].i_visible_lines = i_height;
 756             p_pic->p[ A_PLANE ].i_pitch = i_width_aligned;
 757             p_pic->p[ A_PLANE ].i_visible_pitch = i_width;
 758             p_pic->i_planes = 4;
 759             break;
 760
 761         case FOURCC_YUVP:
 762             p_pic->p->i_lines = i_height_aligned;
 763             p_pic->p->i_visible_lines = i_height;
 764             p_pic->p->i_pitch = i_width_aligned;
 765             p_pic->p->i_visible_pitch = i_width;
 766             p_pic->p->i_pixel_pitch = 8;
 767             p_pic->i_planes = 1;
 768             break;
 769
 770         case FOURCC_Y211:
 771             p_pic->p->i_lines = i_height_aligned;
 772             p_pic->p->i_visible_lines = i_height;
 773             p_pic->p->i_pitch = i_width_aligned;
 774             p_pic->p->i_visible_pitch = i_width;
 775             p_pic->p->i_pixel_pitch = 4;
 776             p_pic->i_planes = 1;
 777             break;
 778
 779         case FOURCC_UYVY:
 780         case FOURCC_YUY2:
 781             p_pic->p->i_lines = i_height_aligned;
 782             p_pic->p->i_visible_lines = i_height;
 783             p_pic->p->i_pitch = i_width_aligned * 2;
 784             p_pic->p->i_visible_pitch = i_width * 2;
 785             p_pic->p->i_pixel_pitch = 4;
 786             p_pic->i_planes = 1;
 787             break;
 788
 789         case FOURCC_RGB2:
 790             p_pic->p->i_lines = i_height_aligned;
 791             p_pic->p->i_visible_lines = i_height;
 792             p_pic->p->i_pitch = i_width_aligned;
 793             p_pic->p->i_visible_pitch = i_width;
 794             p_pic->p->i_pixel_pitch = 1;
 795             p_pic->i_planes = 1;
 796             break;
 797
 798         case FOURCC_RV15:
 799             p_pic->p->i_lines = i_height_aligned;
 800             p_pic->p->i_visible_lines = i_height;
 801             p_pic->p->i_pitch = i_width_aligned * 2;
 802             p_pic->p->i_visible_pitch = i_width * 2;
 803             p_pic->p->i_pixel_pitch = 2;
 804             p_pic->i_planes = 1;
 805             break;
 806
 807         case FOURCC_RV16:
 808             p_pic->p->i_lines = i_height_aligned;
 809             p_pic->p->i_visible_lines = i_height;
 810             p_pic->p->i_pitch = i_width_aligned * 2;
 811             p_pic->p->i_visible_pitch = i_width * 2;
 812             p_pic->p->i_pixel_pitch = 2;
 813             p_pic->i_planes = 1;
 814             break;
 815
 816         case FOURCC_RV24:
 817             p_pic->p->i_lines = i_height_aligned;
 818             p_pic->p->i_visible_lines = i_height;
 819             p_pic->p->i_pitch = i_width_aligned * 3;
 820             p_pic->p->i_visible_pitch = i_width * 3;
 821             p_pic->p->i_pixel_pitch = 3;
 822             p_pic->i_planes = 1;
 823             break;
 824
 825         case FOURCC_RV32:
 826         case FOURCC_RGBA:
 827             p_pic->p->i_lines = i_height_aligned;
 828             p_pic->p->i_visible_lines = i_height;
 829             p_pic->p->i_pitch = i_width_aligned * 4;
 830             p_pic->p->i_visible_pitch = i_width * 4;
 831             p_pic->p->i_pixel_pitch = 4;
 832             p_pic->i_planes = 1;
 833             break;
 834
 835         case FOURCC_GREY:
 836             p_pic->p->i_lines = i_height_aligned;
 837             p_pic->p->i_visible_lines = i_height;
 838             p_pic->p->i_pitch = i_width_aligned;
 839             p_pic->p->i_visible_pitch = i_width;
 840             p_pic->p->i_pixel_pitch = 1;
 841             p_pic->i_planes = 1;
 842             break;
 843
 844         default:
 845             msg_Err( p_this, "unknown chroma type 0x%.8x (%4.4s)",
 846                              i_chroma, (char*)&i_chroma );
 847             p_pic->i_planes = 0;
 848             return VLC_EGENERIC;
 849     }
 850
 851     return VLC_SUCCESS;
 852 }
 853
 854 /**
 855  * Compare two chroma values
 856  *
 857  * This function returns 1 if the two fourcc values given as argument are
 858  * the same format (eg. UYVY/UYNV) or almost the same format (eg. I420/YV12)
 859  */
 860 int vout_ChromaCmp( vlc_fourcc_t i_chroma, vlc_fourcc_t i_amorhc )
 861 {
 862     /* If they are the same, they are the same ! */
 863     if( i_chroma == i_amorhc )
 864     {
 865         return 1;
 866     }
 867
 868     /* Check for equivalence classes */
 869     switch( i_chroma )
 870     {
 871         case FOURCC_I420:
 872         case FOURCC_IYUV:
 873         case FOURCC_YV12:
 874             switch( i_amorhc )
 875             {
 876                 case FOURCC_I420:
 877                 case FOURCC_IYUV:
 878                 case FOURCC_YV12:
 879                     return 1;
 880
 881                 default:
 882                     return 0;
 883             }
 884
 885         case FOURCC_UYVY:
 886         case FOURCC_UYNV:
 887         case FOURCC_Y422:
 888             switch( i_amorhc )
 889             {
 890                 case FOURCC_UYVY:
 891                 case FOURCC_UYNV:
 892                 case FOURCC_Y422:
 893                     return 1;
 894
 895                 default:
 896                     return 0;
 897             }
 898
 899         case FOURCC_YUY2:
 900         case FOURCC_YUNV:
 901             switch( i_amorhc )
 902             {
 903                 case FOURCC_YUY2:
 904                 case FOURCC_YUNV:
 905                     return 1;
 906
 907                 default:
 908                     return 0;
 909             }
 910
 911         default:
 912             return 0;
 913     }
 914 }
 915
 916 /*****************************************************************************
 917  * vout_CopyPicture: copy a picture to another one
 918  *****************************************************************************
 919  * This function takes advantage of the image format, and reduces the
 920  * number of calls to memcpy() to the minimum. Source and destination
 921  * images must have same width (hence i_visible_pitch), height, and chroma.
 922  *****************************************************************************/
 923 void __vout_CopyPicture( vlc_object_t *p_this,
 924                          picture_t *p_dest, picture_t *p_src )
 925 {
 926     int i;
 927
 928     for( i = 0; i < p_src->i_planes ; i++ )
 929     {
 930         if( p_src->p[i].i_pitch == p_dest->p[i].i_pitch )
 931         {
 932             /* There are margins, but with the same width : perfect ! */
 933             vlc_memcpy( p_dest->p[i].p_pixels, p_src->p[i].p_pixels,
 934                         p_src->p[i].i_pitch * p_src->p[i].i_visible_lines );
 935         }
 936         else
 937         {
 938             /* We need to proceed line by line */
 939             uint8_t *p_in = p_src->p[i].p_pixels;
 940             assert( p_in );
 941             uint8_t *p_out = p_dest->p[i].p_pixels;
 942             assert( p_out );
 943             int i_line;
 944
 945             for( i_line = p_src->p[i].i_visible_lines; i_line--; )
 946             {
 947                 vlc_memcpy( p_out, p_in, p_src->p[i].i_visible_pitch );
 948                 p_in += p_src->p[i].i_pitch;
 949                 p_out += p_dest->p[i].i_pitch;
 950             }
 951         }
 952     }
 953
 954     p_dest->date = p_src->date;
 955     p_dest->b_force = p_src->b_force;
 956     p_dest->i_nb_fields = p_src->i_nb_fields;
 957     p_dest->b_progressive = p_src->b_progressive;
 958     p_dest->b_top_field_first = p_src->b_top_field_first;
 959 }