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 VideoLAN
   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., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
  23  *****************************************************************************/
  24
  25 /*****************************************************************************
  26  * Preamble
  27  *****************************************************************************/
  28 #include <stdlib.h>                                                /* free() */
  29 #include <stdio.h>                                              /* sprintf() */
  30 #include <string.h>                                            /* strerror() */
  31
  32 #include <vlc/vlc.h>
  33
  34 #include "vlc_video.h"
  35 #include "video_output.h"
  36
  37 #include "vout_pictures.h"
  38
  39 /*****************************************************************************
  40  * Local prototypes
  41  *****************************************************************************/
  42 static void CopyPicture( vout_thread_t *, picture_t *, picture_t * );
  43
  44 /**
  45  * Display a picture
  46  *
  47  * Remove the reservation flag of a picture, which will cause it to be ready
  48  * for display. The picture won't be displayed until vout_DatePicture has been
  49  * called.
  50  */
  51 void vout_DisplayPicture( vout_thread_t *p_vout, picture_t *p_pic )
  52 {
  53     vlc_mutex_lock( &p_vout->picture_lock );
  54     switch( p_pic->i_status )
  55     {
  56     case RESERVED_PICTURE:
  57         p_pic->i_status = RESERVED_DISP_PICTURE;
  58         break;
  59     case RESERVED_DATED_PICTURE:
  60         p_pic->i_status = READY_PICTURE;
  61         break;
  62     default:
  63         msg_Err( p_vout, "picture to display %p has invalid status %d",
  64                          p_pic, p_pic->i_status );
  65         break;
  66     }
  67
  68     vlc_mutex_unlock( &p_vout->picture_lock );
  69 }
  70
  71 /**
  72  * Date a picture
  73  *
  74  * Remove the reservation flag of a picture, which will cause it to be ready
  75  * for display. The picture won't be displayed until vout_DisplayPicture has
  76  * been called.
  77  * \param p_vout The vout in question
  78  * \param p_pic The picture to date
  79  * \param date The date to display the picture
  80  */
  81 void vout_DatePicture( vout_thread_t *p_vout,
  82                        picture_t *p_pic, mtime_t date )
  83 {
  84     vlc_mutex_lock( &p_vout->picture_lock );
  85     p_pic->date = date;
  86     switch( p_pic->i_status )
  87     {
  88     case RESERVED_PICTURE:
  89         p_pic->i_status = RESERVED_DATED_PICTURE;
  90         break;
  91     case RESERVED_DISP_PICTURE:
  92         p_pic->i_status = READY_PICTURE;
  93         break;
  94     default:
  95         msg_Err( p_vout, "picture to date %p has invalid status %d",
  96                          p_pic, p_pic->i_status );
  97         break;
  98     }
  99
 100     vlc_mutex_unlock( &p_vout->picture_lock );
 101 }
 102
 103 /**
 104  * Allocate a picture in the video output heap.
 105  *
 106  * This function creates a reserved image in the video output heap.
 107  * A null pointer is returned if the function fails. This method provides an
 108  * already allocated zone of memory in the picture data fields.
 109  * It needs locking since several pictures can be created by several producers
 110  * threads.
 111  */
 112 picture_t *vout_CreatePicture( vout_thread_t *p_vout,
 113                                vlc_bool_t b_progressive,
 114                                vlc_bool_t b_top_field_first,
 115                                unsigned int i_nb_fields )
 116 {
 117     int         i_pic;                                      /* picture index */
 118     picture_t * p_pic;
 119     picture_t * p_freepic = NULL;                      /* first free picture */
 120
 121     /* Get lock */
 122     vlc_mutex_lock( &p_vout->picture_lock );
 123
 124     /*
 125      * Look for an empty place in the picture heap.
 126      */
 127     for( i_pic = 0; i_pic < I_RENDERPICTURES; i_pic++ )
 128     {
 129         p_pic = PP_RENDERPICTURE[(p_vout->render.i_last_used_pic + i_pic + 1)
 130                                  % I_RENDERPICTURES];
 131
 132         switch( p_pic->i_status )
 133         {
 134             case DESTROYED_PICTURE:
 135                 /* Memory will not be reallocated, and function can end
 136                  * immediately - this is the best possible case, since no
 137                  * memory allocation needs to be done */
 138                 p_pic->i_status   = RESERVED_PICTURE;
 139                 p_pic->i_refcount = 0;
 140                 p_pic->b_force    = 0;
 141
 142                 p_pic->b_progressive        = b_progressive;
 143                 p_pic->i_nb_fields          = i_nb_fields;
 144                 p_pic->b_top_field_first    = b_top_field_first;
 145
 146                 p_vout->i_heap_size++;
 147                 p_vout->render.i_last_used_pic =
 148                     ( p_vout->render.i_last_used_pic + i_pic + 1 )
 149                     % I_RENDERPICTURES;
 150                 vlc_mutex_unlock( &p_vout->picture_lock );
 151                 return( p_pic );
 152
 153             case FREE_PICTURE:
 154                 /* Picture is empty and ready for allocation */
 155                 p_vout->render.i_last_used_pic =
 156                     ( p_vout->render.i_last_used_pic + i_pic + 1 )
 157                     % I_RENDERPICTURES;
 158                 p_freepic = p_pic;
 159                 break;
 160
 161             default:
 162                 break;
 163         }
 164     }
 165
 166     /*
 167      * Prepare picture
 168      */
 169     if( p_freepic != NULL )
 170     {
 171         vout_AllocatePicture( VLC_OBJECT(p_vout),
 172                               p_freepic, p_vout->render.i_chroma,
 173                               p_vout->render.i_width, p_vout->render.i_height,
 174                               p_vout->render.i_aspect );
 175
 176         if( p_freepic->i_planes )
 177         {
 178             /* Copy picture information, set some default values */
 179             p_freepic->i_status   = RESERVED_PICTURE;
 180             p_freepic->i_type     = MEMORY_PICTURE;
 181             p_freepic->b_slow     = 0;
 182
 183             p_freepic->i_refcount = 0;
 184             p_freepic->b_force = 0;
 185
 186             p_freepic->b_progressive        = b_progressive;
 187             p_freepic->i_nb_fields          = i_nb_fields;
 188             p_freepic->b_top_field_first    = b_top_field_first;
 189
 190             p_freepic->i_matrix_coefficients = 1;
 191
 192             p_vout->i_heap_size++;
 193         }
 194         else
 195         {
 196             /* Memory allocation failed : set picture as empty */
 197             p_freepic->i_status = FREE_PICTURE;
 198             p_freepic = NULL;
 199
 200             msg_Err( p_vout, "picture allocation failed" );
 201         }
 202
 203         vlc_mutex_unlock( &p_vout->picture_lock );
 204
 205         return( p_freepic );
 206     }
 207
 208     /* No free or destroyed picture could be found, but the decoder
 209      * will try again in a while. */
 210     vlc_mutex_unlock( &p_vout->picture_lock );
 211
 212     return( NULL );
 213 }
 214
 215 /**
 216  * Remove a permanent or reserved picture from the heap
 217  *
 218  * This function frees a previously reserved picture or a permanent
 219  * picture. It is meant to be used when the construction of a picture aborted.
 220  * Note that the picture will be destroyed even if it is linked !
 221  */
 222 void vout_DestroyPicture( vout_thread_t *p_vout, picture_t *p_pic )
 223 {
 224     vlc_mutex_lock( &p_vout->picture_lock );
 225
 226 #ifdef DEBUG
 227     /* Check if picture status is valid */
 228     if( (p_pic->i_status != RESERVED_PICTURE) &&
 229         (p_pic->i_status != RESERVED_DATED_PICTURE) &&
 230         (p_pic->i_status != RESERVED_DISP_PICTURE) )
 231     {
 232         msg_Err( p_vout, "picture to destroy %p has invalid status %d",
 233                          p_pic, p_pic->i_status );
 234     }
 235 #endif
 236
 237     p_pic->i_status = DESTROYED_PICTURE;
 238     p_vout->i_heap_size--;
 239
 240     vlc_mutex_unlock( &p_vout->picture_lock );
 241 }
 242
 243 /**
 244  * Increment reference counter of a picture
 245  *
 246  * This function increments the reference counter of a picture in the video
 247  * heap. It needs a lock since several producer threads can access the picture.
 248  */
 249 void vout_LinkPicture( vout_thread_t *p_vout, picture_t *p_pic )
 250 {
 251     vlc_mutex_lock( &p_vout->picture_lock );
 252     p_pic->i_refcount++;
 253     vlc_mutex_unlock( &p_vout->picture_lock );
 254 }
 255
 256 /**
 257  * Decrement reference counter of a picture
 258  *
 259  * This function decrement the reference counter of a picture in the video heap
 260  */
 261 void vout_UnlinkPicture( vout_thread_t *p_vout, picture_t *p_pic )
 262 {
 263     vlc_mutex_lock( &p_vout->picture_lock );
 264     p_pic->i_refcount--;
 265
 266     if( p_pic->i_refcount < 0 )
 267     {
 268         msg_Err( p_vout, "picture %p refcount is %i",
 269                  p_pic, p_pic->i_refcount );
 270         p_pic->i_refcount = 0;
 271     }
 272
 273     if( ( p_pic->i_refcount == 0 ) &&
 274         ( p_pic->i_status == DISPLAYED_PICTURE ) )
 275     {
 276         p_pic->i_status = DESTROYED_PICTURE;
 277         p_vout->i_heap_size--;
 278     }
 279
 280     vlc_mutex_unlock( &p_vout->picture_lock );
 281 }
 282
 283 /**
 284  * Render a picture
 285  *
 286  * This function chooses whether the current picture needs to be copied
 287  * before rendering, does the subpicture magic, and tells the video output
 288  * thread which direct buffer needs to be displayed.
 289  */
 290 picture_t * vout_RenderPicture( vout_thread_t *p_vout, picture_t *p_pic,
 291                                                        subpicture_t *p_subpic )
 292 {
 293     if( p_pic == NULL )
 294     {
 295         /* XXX: subtitles */
 296
 297         return NULL;
 298     }
 299
 300     if( p_pic->i_type == DIRECT_PICTURE )
 301     {
 302         if( !p_vout->render.b_allow_modify_pics || p_pic->i_refcount ||
 303             p_pic->b_force )
 304         {
 305             /* Picture is in a direct buffer and is still in use,
 306              * we need to copy it to another direct buffer before
 307              * displaying it if there are subtitles. */
 308             if( p_subpic != NULL )
 309             {
 310                 /* We have subtitles. First copy the picture to
 311                  * the spare direct buffer, then render the
 312                  * subtitles. */
 313                 CopyPicture( p_vout, p_pic, PP_OUTPUTPICTURE[0] );
 314
 315                 vout_RenderSubPictures( p_vout, PP_OUTPUTPICTURE[0],
 316                                         p_pic , p_subpic );
 317
 318                 return PP_OUTPUTPICTURE[0];
 319             }
 320
 321             /* No subtitles, picture is in a directbuffer so
 322              * we can display it directly even if it is still
 323              * in use. */
 324             return p_pic;
 325         }
 326
 327         /* Picture is in a direct buffer but isn't used by the
 328          * decoder. We can safely render subtitles on it and
 329          * display it. */
 330         vout_RenderSubPictures( p_vout, p_pic, p_pic, p_subpic );
 331
 332         return p_pic;
 333     }
 334
 335     /* Not a direct buffer. We either need to copy it to a direct buffer,
 336      * or render it if the chroma isn't the same. */
 337     if( p_vout->b_direct )
 338     {
 339         /* Picture is not in a direct buffer, but is exactly the
 340          * same size as the direct buffers. A memcpy() is enough,
 341          * then render the subtitles. */
 342
 343         if( PP_OUTPUTPICTURE[0]->pf_lock )
 344             if( PP_OUTPUTPICTURE[0]->pf_lock( p_vout, PP_OUTPUTPICTURE[0] ) )
 345             {
 346                 if( PP_OUTPUTPICTURE[0]->pf_unlock )
 347                 PP_OUTPUTPICTURE[0]->pf_unlock( p_vout, PP_OUTPUTPICTURE[0] );
 348
 349                 return NULL;
 350             }
 351
 352         CopyPicture( p_vout, p_pic, PP_OUTPUTPICTURE[0] );
 353         vout_RenderSubPictures( p_vout, PP_OUTPUTPICTURE[0], p_pic, p_subpic );
 354
 355         if( PP_OUTPUTPICTURE[0]->pf_unlock )
 356             PP_OUTPUTPICTURE[0]->pf_unlock( p_vout, PP_OUTPUTPICTURE[0] );
 357
 358         return PP_OUTPUTPICTURE[0];
 359     }
 360
 361     /* Picture is not in a direct buffer, and needs to be converted to
 362      * another size/chroma. Then the subtitles need to be rendered as
 363      * well. This usually means software YUV, or hardware YUV with a
 364      * different chroma. */
 365
 366     if( p_subpic != NULL && p_vout->p_picture[0].b_slow )
 367     {
 368         /* The picture buffer is in slow memory. We'll use
 369          * the "2 * VOUT_MAX_PICTURES + 1" picture as a temporary
 370          * one for subpictures rendering. */
 371         picture_t *p_tmp_pic = &p_vout->p_picture[2 * VOUT_MAX_PICTURES];
 372         if( p_tmp_pic->i_status == FREE_PICTURE )
 373         {
 374             vout_AllocatePicture( VLC_OBJECT(p_vout),
 375                                   p_tmp_pic, p_vout->output.i_chroma,
 376                                   p_vout->output.i_width,
 377                                   p_vout->output.i_height,
 378                                   p_vout->output.i_aspect );
 379             p_tmp_pic->i_type = MEMORY_PICTURE;
 380             p_tmp_pic->i_status = RESERVED_PICTURE;
 381         }
 382
 383         /* Convert image to the first direct buffer */
 384         p_vout->chroma.pf_convert( p_vout, p_pic, p_tmp_pic );
 385
 386         /* Render subpictures on the first direct buffer */
 387         vout_RenderSubPictures( p_vout, p_tmp_pic, p_tmp_pic, p_subpic );
 388
 389         if( p_vout->p_picture[0].pf_lock )
 390             if( p_vout->p_picture[0].pf_lock( p_vout, &p_vout->p_picture[0] ) )
 391                 return NULL;
 392
 393         CopyPicture( p_vout, p_tmp_pic, &p_vout->p_picture[0] );
 394     }
 395     else
 396     {
 397         if( p_vout->p_picture[0].pf_lock )
 398             if( p_vout->p_picture[0].pf_lock( p_vout, &p_vout->p_picture[0] ) )
 399                 return NULL;
 400
 401         /* Convert image to the first direct buffer */
 402         p_vout->chroma.pf_convert( p_vout, p_pic, &p_vout->p_picture[0] );
 403
 404         /* Render subpictures on the first direct buffer */
 405         vout_RenderSubPictures( p_vout, &p_vout->p_picture[0],
 406                                 &p_vout->p_picture[0], p_subpic );
 407     }
 408
 409     if( p_vout->p_picture[0].pf_unlock )
 410         p_vout->p_picture[0].pf_unlock( p_vout, &p_vout->p_picture[0] );
 411
 412     return &p_vout->p_picture[0];
 413 }
 414
 415 /**
 416  * Calculate image window coordinates
 417  *
 418  * This function will be accessed by plugins. It calculates the relative
 419  * position of the output window and the image window.
 420  */
 421 void vout_PlacePicture( vout_thread_t *p_vout,
 422                         unsigned int i_width, unsigned int i_height,
 423                         unsigned int *pi_x, unsigned int *pi_y,
 424                         unsigned int *pi_width, unsigned int *pi_height )
 425 {
 426     if( (i_width <= 0) || (i_height <=0) )
 427     {
 428         *pi_width = *pi_height = *pi_x = *pi_y = 0;
 429
 430         return;
 431     }
 432
 433     if( p_vout->b_scale )
 434     {
 435         *pi_width = i_width;
 436         *pi_height = i_height;
 437     }
 438     else
 439     {
 440         *pi_width = __MIN( i_width, p_vout->render.i_width );
 441         *pi_height = __MIN( i_height, p_vout->render.i_height );
 442     }
 443
 444     if( VOUT_ASPECT_FACTOR * *pi_width / *pi_height < p_vout->render.i_aspect )
 445     {
 446         *pi_width = *pi_height * p_vout->render.i_aspect / VOUT_ASPECT_FACTOR;
 447     }
 448     else
 449     {
 450         *pi_height = *pi_width * VOUT_ASPECT_FACTOR / p_vout->render.i_aspect;
 451     }
 452
 453     if( *pi_width > i_width )
 454     {
 455         *pi_width = i_width;
 456         *pi_height = VOUT_ASPECT_FACTOR * *pi_width / p_vout->render.i_aspect;
 457     }
 458
 459     if( *pi_height > i_height )
 460     {
 461         *pi_height = i_height;
 462         *pi_width = *pi_height * p_vout->render.i_aspect / VOUT_ASPECT_FACTOR;
 463     }
 464
 465     switch( p_vout->i_alignment & VOUT_ALIGN_HMASK )
 466     {
 467     case VOUT_ALIGN_LEFT:
 468         *pi_x = 0;
 469         break;
 470     case VOUT_ALIGN_RIGHT:
 471         *pi_x = i_width - *pi_width;
 472         break;
 473     default:
 474         *pi_x = ( i_width - *pi_width ) / 2;
 475     }
 476
 477     switch( p_vout->i_alignment & VOUT_ALIGN_VMASK )
 478     {
 479     case VOUT_ALIGN_TOP:
 480         *pi_y = 0;
 481         break;
 482     case VOUT_ALIGN_BOTTOM:
 483         *pi_y = i_height - *pi_height;
 484         break;
 485     default:
 486         *pi_y = ( i_height - *pi_height ) / 2;
 487     }
 488 }
 489
 490 /**
 491  * Allocate a new picture in the heap.
 492  *
 493  * This function allocates a fake direct buffer in memory, which can be
 494  * used exactly like a video buffer. The video output thread then manages
 495  * how it gets displayed.
 496  */
 497 void vout_AllocatePicture( vlc_object_t *p_this, picture_t *p_pic,
 498                            vlc_fourcc_t i_chroma,
 499                            int i_width, int i_height, int i_aspect )
 500 {
 501     int i_bytes, i_index, i_width_aligned, i_height_aligned;
 502
 503     /* Make sure the real dimensions are a multiple of 16 */
 504     i_width_aligned = (i_width + 15) >> 4 << 4;
 505     i_height_aligned = (i_height + 15) >> 4 << 4;
 506
 507     vout_InitPicture( p_this, p_pic, i_chroma,
 508                       i_width, i_height, i_aspect );
 509
 510     /* Calculate how big the new image should be */
 511     i_bytes = p_pic->format.i_bits_per_pixel *
 512         i_width_aligned * i_height_aligned / 8;
 513
 514     p_pic->p_data = vlc_memalign( &p_pic->p_data_orig, 16, i_bytes );
 515
 516     if( p_pic->p_data == NULL )
 517     {
 518         p_pic->i_planes = 0;
 519         return;
 520     }
 521
 522     /* Fill the p_pixels field for each plane */
 523     p_pic->p[ 0 ].p_pixels = p_pic->p_data;
 524
 525     for( i_index = 1; i_index < p_pic->i_planes; i_index++ )
 526     {
 527         p_pic->p[i_index].p_pixels = p_pic->p[i_index-1].p_pixels +
 528             p_pic->p[i_index-1].i_lines * p_pic->p[i_index-1].i_pitch;
 529     }
 530 }
 531
 532 /**
 533  * Initialise the video format fields given chroma/size.
 534  *
 535  * This function initializes all the video_frame_format_t fields given the
 536  * static properties of a picture (chroma and size).
 537  * \param p_format Pointer to the format structure to initialize
 538  * \param i_chroma Chroma to set
 539  * \param i_width Width to set
 540  * \param i_height Height to set
 541  * \param i_aspect Aspect ratio
 542  */
 543 void vout_InitFormat( video_frame_format_t *p_format, vlc_fourcc_t i_chroma,
 544                       int i_width, int i_height, int i_aspect )
 545 {
 546     p_format->i_chroma   = i_chroma;
 547     p_format->i_width    = p_format->i_visible_width  = i_width;
 548     p_format->i_height   = p_format->i_visible_height = i_height;
 549     p_format->i_x_offset = p_format->i_y_offset = 0;
 550     p_format->i_aspect   = i_aspect;
 551
 552 #if 0
 553     /* Assume we have square pixels */
 554     if( i_width && i_height )
 555         p_format->i_aspect = i_width * VOUT_ASPECT_FACTOR / i_height;
 556     else
 557         p_format->i_aspect = 0;
 558 #endif
 559
 560     switch( i_chroma )
 561     {
 562         case FOURCC_YUVA:
 563             p_format->i_bits_per_pixel = 32;
 564             break;
 565         case FOURCC_I444:
 566             p_format->i_bits_per_pixel = 24;
 567             break;
 568         case FOURCC_I422:
 569         case FOURCC_YUY2:
 570         case FOURCC_UYVY:
 571             p_format->i_bits_per_pixel = 16;
 572             p_format->i_bits_per_pixel = 16;
 573             break;
 574         case FOURCC_I411:
 575         case FOURCC_YV12:
 576         case FOURCC_I420:
 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             p_format->i_bits_per_pixel = 32;
 593             break;
 594         case FOURCC_RV24:
 595             /* FIXME: Should be 24 here but x11 and our chroma conversion
 596              * routines assume 32. */
 597 #ifdef WIN32
 598             p_format->i_bits_per_pixel = 24;
 599 #else
 600             p_format->i_bits_per_pixel = 32;
 601 #endif
 602             break;
 603         case FOURCC_RV15:
 604         case FOURCC_RV16:
 605             p_format->i_bits_per_pixel = 16;
 606             break;
 607         case FOURCC_RGB2:
 608             p_format->i_bits_per_pixel = 8;
 609             break;
 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 void 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             p_pic->p[ Y_PLANE ].i_lines = i_height_aligned;
 692             p_pic->p[ Y_PLANE ].i_visible_lines = i_height;
 693             p_pic->p[ Y_PLANE ].i_pitch = i_width_aligned;
 694             p_pic->p[ Y_PLANE ].i_visible_pitch = i_width;
 695             p_pic->p[ U_PLANE ].i_lines = i_height_aligned / 2;
 696             p_pic->p[ U_PLANE ].i_visible_lines = i_height / 2;
 697             p_pic->p[ U_PLANE ].i_pitch = i_width_aligned / 2;
 698             p_pic->p[ U_PLANE ].i_visible_pitch = i_width / 2;
 699             p_pic->p[ V_PLANE ].i_lines = i_height_aligned / 2;
 700             p_pic->p[ V_PLANE ].i_visible_lines = i_height / 2;
 701             p_pic->p[ V_PLANE ].i_pitch = i_width_aligned / 2;
 702             p_pic->p[ V_PLANE ].i_visible_pitch = i_width / 2;
 703             p_pic->i_planes = 3;
 704             break;
 705
 706         case FOURCC_I422:
 707             p_pic->p[ Y_PLANE ].i_lines = i_height_aligned;
 708             p_pic->p[ Y_PLANE ].i_visible_lines = i_height;
 709             p_pic->p[ Y_PLANE ].i_pitch = i_width_aligned;
 710             p_pic->p[ Y_PLANE ].i_visible_pitch = i_width;
 711             p_pic->p[ U_PLANE ].i_lines = i_height_aligned;
 712             p_pic->p[ U_PLANE ].i_visible_lines = i_height;
 713             p_pic->p[ U_PLANE ].i_pitch = i_width_aligned / 2;
 714             p_pic->p[ U_PLANE ].i_visible_pitch = i_width / 2;
 715             p_pic->p[ V_PLANE ].i_lines = i_height_aligned;
 716             p_pic->p[ V_PLANE ].i_visible_lines = i_height;
 717             p_pic->p[ V_PLANE ].i_pitch = i_width_aligned / 2;
 718             p_pic->p[ V_PLANE ].i_visible_pitch = i_width / 2;
 719             p_pic->i_planes = 3;
 720             break;
 721
 722         case FOURCC_I444:
 723             p_pic->p[ Y_PLANE ].i_lines = i_height_aligned;
 724             p_pic->p[ Y_PLANE ].i_visible_lines = i_height;
 725             p_pic->p[ Y_PLANE ].i_pitch = i_width_aligned;
 726             p_pic->p[ Y_PLANE ].i_visible_pitch = i_width;
 727             p_pic->p[ U_PLANE ].i_lines = i_height_aligned;
 728             p_pic->p[ U_PLANE ].i_visible_lines = i_height;
 729             p_pic->p[ U_PLANE ].i_pitch = i_width_aligned;
 730             p_pic->p[ U_PLANE ].i_visible_pitch = i_width;
 731             p_pic->p[ V_PLANE ].i_lines = i_height_aligned;
 732             p_pic->p[ V_PLANE ].i_visible_lines = i_height;
 733             p_pic->p[ V_PLANE ].i_pitch = i_width_aligned;
 734             p_pic->p[ V_PLANE ].i_visible_pitch = i_width;
 735             p_pic->i_planes = 3;
 736             break;
 737
 738         case FOURCC_YUVA:
 739             p_pic->p[ Y_PLANE ].i_lines = i_height_aligned;
 740             p_pic->p[ Y_PLANE ].i_visible_lines = i_height;
 741             p_pic->p[ Y_PLANE ].i_pitch = i_width_aligned;
 742             p_pic->p[ Y_PLANE ].i_visible_pitch = i_width;
 743             p_pic->p[ U_PLANE ].i_lines = i_height_aligned;
 744             p_pic->p[ U_PLANE ].i_visible_lines = i_height;
 745             p_pic->p[ U_PLANE ].i_pitch = i_width_aligned;
 746             p_pic->p[ U_PLANE ].i_visible_pitch = i_width;
 747             p_pic->p[ V_PLANE ].i_lines = i_height_aligned;
 748             p_pic->p[ V_PLANE ].i_visible_lines = i_height;
 749             p_pic->p[ V_PLANE ].i_pitch = i_width_aligned;
 750             p_pic->p[ V_PLANE ].i_visible_pitch = i_width;
 751             p_pic->p[ A_PLANE ].i_lines = i_height_aligned;
 752             p_pic->p[ A_PLANE ].i_visible_lines = i_height;
 753             p_pic->p[ A_PLANE ].i_pitch = i_width_aligned;
 754             p_pic->p[ A_PLANE ].i_visible_pitch = i_width;
 755             p_pic->i_planes = 4;
 756             break;
 757
 758         case FOURCC_YUVP:
 759             p_pic->p->i_lines = i_height_aligned;
 760             p_pic->p->i_visible_lines = i_height;
 761             p_pic->p->i_pitch = i_width_aligned;
 762             p_pic->p->i_visible_pitch = i_width;
 763             p_pic->p->i_pixel_pitch = 8;
 764             p_pic->i_planes = 1;
 765             break;
 766
 767         case FOURCC_Y211:
 768             p_pic->p->i_lines = i_height_aligned;
 769             p_pic->p->i_visible_lines = i_height;
 770             p_pic->p->i_pitch = i_width_aligned;
 771             p_pic->p->i_visible_pitch = i_width;
 772             p_pic->p->i_pixel_pitch = 4;
 773             p_pic->i_planes = 1;
 774             break;
 775
 776         case FOURCC_UYVY:
 777         case FOURCC_YUY2:
 778             p_pic->p->i_lines = i_height_aligned;
 779             p_pic->p->i_visible_lines = i_height;
 780             p_pic->p->i_pitch = i_width_aligned * 2;
 781             p_pic->p->i_visible_pitch = i_width * 2;
 782             p_pic->p->i_pixel_pitch = 4;
 783             p_pic->i_planes = 1;
 784             break;
 785
 786         case FOURCC_RGB2:
 787             p_pic->p->i_lines = i_height_aligned;
 788             p_pic->p->i_visible_lines = i_height;
 789             p_pic->p->i_pitch = i_width_aligned;
 790             p_pic->p->i_visible_pitch = i_width;
 791             p_pic->p->i_pixel_pitch = 1;
 792             p_pic->i_planes = 1;
 793             break;
 794
 795         case FOURCC_RV15:
 796             p_pic->p->i_lines = i_height_aligned;
 797             p_pic->p->i_visible_lines = i_height;
 798             p_pic->p->i_pitch = i_width_aligned * 2;
 799             p_pic->p->i_visible_pitch = i_width * 2;
 800             p_pic->p->i_pixel_pitch = 2;
 801             p_pic->i_planes = 1;
 802             break;
 803
 804         case FOURCC_RV16:
 805             p_pic->p->i_lines = i_height_aligned;
 806             p_pic->p->i_visible_lines = i_height;
 807             p_pic->p->i_pitch = i_width_aligned * 2;
 808             p_pic->p->i_visible_pitch = i_width * 2;
 809             p_pic->p->i_pixel_pitch = 2;
 810             p_pic->i_planes = 1;
 811             break;
 812
 813         case FOURCC_RV24:
 814             p_pic->p->i_lines = i_height_aligned;
 815             p_pic->p->i_visible_lines = i_height;
 816             p_pic->p->i_pitch = i_width_aligned * 3;
 817             p_pic->p->i_visible_pitch = i_width * 3;
 818             p_pic->p->i_pixel_pitch = 3;
 819             p_pic->i_planes = 1;
 820             break;
 821
 822         case FOURCC_RV32:
 823             p_pic->p->i_lines = i_height_aligned;
 824             p_pic->p->i_visible_lines = i_height;
 825             p_pic->p->i_pitch = i_width_aligned * 4;
 826             p_pic->p->i_visible_pitch = i_width * 4;
 827             p_pic->p->i_pixel_pitch = 4;
 828             p_pic->i_planes = 1;
 829             break;
 830
 831         default:
 832             msg_Err( p_this, "unknown chroma type 0x%.8x (%4.4s)",
 833                              i_chroma, (char*)&i_chroma );
 834             p_pic->i_planes = 0;
 835             return;
 836     }
 837 }
 838
 839 /**
 840  * Compare two chroma values
 841  *
 842  * This function returns 1 if the two fourcc values given as argument are
 843  * the same format (eg. UYVY/UYNV) or almost the same format (eg. I420/YV12)
 844  */
 845 int vout_ChromaCmp( vlc_fourcc_t i_chroma, vlc_fourcc_t i_amorhc )
 846 {
 847     /* If they are the same, they are the same ! */
 848     if( i_chroma == i_amorhc )
 849     {
 850         return 1;
 851     }
 852
 853     /* Check for equivalence classes */
 854     switch( i_chroma )
 855     {
 856         case FOURCC_I420:
 857         case FOURCC_IYUV:
 858         case FOURCC_YV12:
 859             switch( i_amorhc )
 860             {
 861                 case FOURCC_I420:
 862                 case FOURCC_IYUV:
 863                 case FOURCC_YV12:
 864                     return 1;
 865
 866                 default:
 867                     return 0;
 868             }
 869
 870         case FOURCC_UYVY:
 871         case FOURCC_UYNV:
 872         case FOURCC_Y422:
 873             switch( i_amorhc )
 874             {
 875                 case FOURCC_UYVY:
 876                 case FOURCC_UYNV:
 877                 case FOURCC_Y422:
 878                     return 1;
 879
 880                 default:
 881                     return 0;
 882             }
 883
 884         case FOURCC_YUY2:
 885         case FOURCC_YUNV:
 886             switch( i_amorhc )
 887             {
 888                 case FOURCC_YUY2:
 889                 case FOURCC_YUNV:
 890                     return 1;
 891
 892                 default:
 893                     return 0;
 894             }
 895
 896         default:
 897             return 0;
 898     }
 899 }
 900
 901 /* Following functions are local */
 902
 903 /*****************************************************************************
 904  * CopyPicture: copy a picture to another one
 905  *****************************************************************************
 906  * This function takes advantage of the image format, and reduces the
 907  * number of calls to memcpy() to the minimum. Source and destination
 908  * images must have same width (hence i_visible_pitch), height, and chroma.
 909  *****************************************************************************/
 910 static void CopyPicture( vout_thread_t * p_vout,
 911                          picture_t *p_src, picture_t *p_dest )
 912 {
 913     int i;
 914
 915     for( i = 0; i < p_src->i_planes ; i++ )
 916     {
 917         if( p_src->p[i].i_pitch == p_dest->p[i].i_pitch )
 918         {
 919             /* There are margins, but with the same width : perfect ! */
 920             p_vout->p_vlc->pf_memcpy(
 921                          p_dest->p[i].p_pixels, p_src->p[i].p_pixels,
 922                          p_src->p[i].i_pitch * p_src->p[i].i_visible_lines );
 923         }
 924         else
 925         {
 926             /* We need to proceed line by line */
 927             uint8_t *p_in = p_src->p[i].p_pixels;
 928             uint8_t *p_out = p_dest->p[i].p_pixels;
 929             int i_line;
 930
 931             for( i_line = p_src->p[i].i_visible_lines; i_line--; )
 932             {
 933                 p_vout->p_vlc->pf_memcpy( p_out, p_in,
 934                                           p_src->p[i].i_visible_pitch );
 935                 p_in += p_src->p[i].i_pitch;
 936                 p_out += p_dest->p[i].i_pitch;
 937             }
 938         }
 939     }
 940     p_dest->date = p_src->date;
 941 }