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: vout_pictures.c,v 1.47 2004/02/27 14:01:35 fenrir Exp $
   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  * vout_DisplayPicture: 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  * vout_DatePicture: 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  *****************************************************************************/
  78 void vout_DatePicture( vout_thread_t *p_vout,
  79                        picture_t *p_pic, mtime_t date )
  80 {
  81     vlc_mutex_lock( &p_vout->picture_lock );
  82     p_pic->date = date;
  83     switch( p_pic->i_status )
  84     {
  85     case RESERVED_PICTURE:
  86         p_pic->i_status = RESERVED_DATED_PICTURE;
  87         break;
  88     case RESERVED_DISP_PICTURE:
  89         p_pic->i_status = READY_PICTURE;
  90         break;
  91     default:
  92         msg_Err( p_vout, "picture to date %p has invalid status %d",
  93                          p_pic, p_pic->i_status );
  94         break;
  95     }
  96
  97     vlc_mutex_unlock( &p_vout->picture_lock );
  98 }
  99
 100 /*****************************************************************************
 101  * vout_CreatePicture: allocate a picture in the video output heap.
 102  *****************************************************************************
 103  * This function creates a reserved image in the video output heap.
 104  * A null pointer is returned if the function fails. This method provides an
 105  * already allocated zone of memory in the picture data fields.
 106  * It needs locking since several pictures can be created by several producers
 107  * threads.
 108  *****************************************************************************/
 109 picture_t *vout_CreatePicture( vout_thread_t *p_vout,
 110                                vlc_bool_t b_progressive,
 111                                vlc_bool_t b_top_field_first,
 112                                unsigned int i_nb_fields )
 113 {
 114     int         i_pic;                                      /* picture index */
 115     picture_t * p_pic;
 116     picture_t * p_freepic = NULL;                      /* first free picture */
 117
 118     /* Get lock */
 119     vlc_mutex_lock( &p_vout->picture_lock );
 120
 121     /*
 122      * Look for an empty place in the picture heap.
 123      */
 124     for( i_pic = 0; i_pic < I_RENDERPICTURES; i_pic++ )
 125     {
 126         p_pic = PP_RENDERPICTURE[(p_vout->render.i_last_used_pic + i_pic + 1)
 127                                  % I_RENDERPICTURES];
 128
 129         switch( p_pic->i_status )
 130         {
 131             case DESTROYED_PICTURE:
 132                 /* Memory will not be reallocated, and function can end
 133                  * immediately - this is the best possible case, since no
 134                  * memory allocation needs to be done */
 135                 p_pic->i_status   = RESERVED_PICTURE;
 136                 p_pic->i_refcount = 0;
 137                 p_pic->b_force    = 0;
 138
 139                 p_pic->b_progressive        = b_progressive;
 140                 p_pic->i_nb_fields          = i_nb_fields;
 141                 p_pic->b_top_field_first    = b_top_field_first;
 142
 143                 p_vout->i_heap_size++;
 144                 p_vout->render.i_last_used_pic =
 145                     ( p_vout->render.i_last_used_pic + i_pic + 1 )
 146                     % I_RENDERPICTURES;
 147                 vlc_mutex_unlock( &p_vout->picture_lock );
 148                 return( p_pic );
 149
 150             case FREE_PICTURE:
 151                 /* Picture is empty and ready for allocation */
 152                 p_vout->render.i_last_used_pic =
 153                     ( p_vout->render.i_last_used_pic + i_pic + 1 )
 154                     % I_RENDERPICTURES;
 155                 p_freepic = p_pic;
 156                 break;
 157
 158             default:
 159                 break;
 160         }
 161     }
 162
 163     /*
 164      * Prepare picture
 165      */
 166     if( p_freepic != NULL )
 167     {
 168         vout_AllocatePicture( VLC_OBJECT(p_vout),
 169                               p_freepic, p_vout->render.i_chroma,
 170                               p_vout->render.i_width, p_vout->render.i_height,
 171                               p_vout->render.i_aspect );
 172
 173         if( p_freepic->i_planes )
 174         {
 175             /* Copy picture information, set some default values */
 176             p_freepic->i_status   = RESERVED_PICTURE;
 177             p_freepic->i_type     = MEMORY_PICTURE;
 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  * vout_DestroyPicture: 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 #ifdef DEBUG
 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  * vout_LinkPicture: 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  * vout_UnlinkPicture: 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     {
 264         msg_Err( p_vout, "picture %p refcount is %i",
 265                  p_pic, p_pic->i_refcount );
 266         p_pic->i_refcount = 0;
 267     }
 268
 269     if( ( p_pic->i_refcount == 0 ) &&
 270         ( p_pic->i_status == DISPLAYED_PICTURE ) )
 271     {
 272         p_pic->i_status = DESTROYED_PICTURE;
 273         p_vout->i_heap_size--;
 274     }
 275
 276     vlc_mutex_unlock( &p_vout->picture_lock );
 277 }
 278
 279 /*****************************************************************************
 280  * vout_RenderPicture: render a picture
 281  *****************************************************************************
 282  * This function chooses whether the current picture needs to be copied
 283  * before rendering, does the subpicture magic, and tells the video output
 284  * thread which direct buffer needs to be displayed.
 285  *****************************************************************************/
 286 picture_t * vout_RenderPicture( vout_thread_t *p_vout, picture_t *p_pic,
 287                                                        subpicture_t *p_subpic )
 288 {
 289     if( p_pic == NULL )
 290     {
 291         /* XXX: subtitles */
 292
 293         return NULL;
 294     }
 295
 296     if( p_pic->i_type == DIRECT_PICTURE )
 297     {
 298         if( !p_vout->render.b_allow_modify_pics || p_pic->i_refcount )
 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                 CopyPicture( p_vout, p_pic, PP_OUTPUTPICTURE[0] );
 309
 310                 vout_RenderSubPictures( p_vout, PP_OUTPUTPICTURE[0], p_subpic );
 311
 312                 return PP_OUTPUTPICTURE[0];
 313             }
 314
 315             /* No subtitles, picture is in a directbuffer so
 316              * we can display it directly even if it is still
 317              * in use. */
 318             return p_pic;
 319         }
 320
 321         /* Picture is in a direct buffer but isn't used by the
 322          * decoder. We can safely render subtitles on it and
 323          * display it. */
 324         vout_RenderSubPictures( p_vout, p_pic, p_subpic );
 325
 326         return p_pic;
 327     }
 328
 329     /* Not a direct buffer. We either need to copy it to a direct buffer,
 330      * or render it if the chroma isn't the same. */
 331     if( p_vout->b_direct )
 332     {
 333         /* Picture is not in a direct buffer, but is exactly the
 334          * same size as the direct buffers. A memcpy() is enough,
 335          * then render the subtitles. */
 336
 337         if( PP_OUTPUTPICTURE[0]->pf_lock )
 338             if( PP_OUTPUTPICTURE[0]->pf_lock( p_vout, PP_OUTPUTPICTURE[0] ) )
 339             {
 340                 if( PP_OUTPUTPICTURE[0]->pf_unlock )
 341                 PP_OUTPUTPICTURE[0]->pf_unlock( p_vout, PP_OUTPUTPICTURE[0] );
 342
 343                 return NULL;
 344             }
 345
 346         CopyPicture( p_vout, p_pic, PP_OUTPUTPICTURE[0] );
 347
 348         vout_RenderSubPictures( p_vout, PP_OUTPUTPICTURE[0], p_subpic );
 349
 350         if( PP_OUTPUTPICTURE[0]->pf_unlock )
 351             PP_OUTPUTPICTURE[0]->pf_unlock( p_vout, PP_OUTPUTPICTURE[0] );
 352
 353         return PP_OUTPUTPICTURE[0];
 354     }
 355
 356     /* Picture is not in a direct buffer, and needs to be converted to
 357      * another size/chroma. Then the subtitles need to be rendered as
 358      * well. This usually means software YUV, or hardware YUV with a
 359      * different chroma. */
 360
 361     if( p_vout->p_picture[0].pf_lock )
 362         if( p_vout->p_picture[0].pf_lock( p_vout, &p_vout->p_picture[0] ) )
 363             return NULL;
 364
 365     /* Convert image to the first direct buffer */
 366     p_vout->chroma.pf_convert( p_vout, p_pic, &p_vout->p_picture[0] );
 367
 368     /* Render subpictures on the first direct buffer */
 369     vout_RenderSubPictures( p_vout, &p_vout->p_picture[0], p_subpic );
 370
 371     if( p_vout->p_picture[0].pf_unlock )
 372         p_vout->p_picture[0].pf_unlock( p_vout, &p_vout->p_picture[0] );
 373
 374     return &p_vout->p_picture[0];
 375 }
 376
 377 /*****************************************************************************
 378  * vout_PlacePicture: calculate image window coordinates
 379  *****************************************************************************
 380  * This function will be accessed by plugins. It calculates the relative
 381  * position of the output window and the image window.
 382  *****************************************************************************/
 383 void vout_PlacePicture( vout_thread_t *p_vout,
 384                         unsigned int i_width, unsigned int i_height,
 385                         unsigned int *pi_x, unsigned int *pi_y,
 386                         unsigned int *pi_width, unsigned int *pi_height )
 387 {
 388     if( (i_width <= 0) || (i_height <=0) )
 389     {
 390         *pi_width = *pi_height = *pi_x = *pi_y = 0;
 391
 392         return;
 393     }
 394
 395     if( p_vout->b_scale )
 396     {
 397         *pi_width = i_width;
 398         *pi_height = i_height;
 399     }
 400     else
 401     {
 402         *pi_width = __MIN( i_width, p_vout->render.i_width );
 403         *pi_height = __MIN( i_height, p_vout->render.i_height );
 404     }
 405
 406     if( VOUT_ASPECT_FACTOR * *pi_width / *pi_height < p_vout->render.i_aspect )
 407     {
 408         *pi_width = *pi_height * p_vout->render.i_aspect / VOUT_ASPECT_FACTOR;
 409     }
 410     else
 411     {
 412         *pi_height = *pi_width * VOUT_ASPECT_FACTOR / p_vout->render.i_aspect;
 413     }
 414
 415     if( *pi_width > i_width )
 416     {
 417         *pi_width = i_width;
 418         *pi_height = VOUT_ASPECT_FACTOR * *pi_width / p_vout->render.i_aspect;
 419     }
 420
 421     if( *pi_height > i_height )
 422     {
 423         *pi_height = i_height;
 424         *pi_width = *pi_height * p_vout->render.i_aspect / VOUT_ASPECT_FACTOR;
 425     }
 426
 427     switch( p_vout->i_alignment & VOUT_ALIGN_HMASK )
 428     {
 429     case VOUT_ALIGN_LEFT:
 430         *pi_x = 0;
 431         break;
 432     case VOUT_ALIGN_RIGHT:
 433         *pi_x = i_width - *pi_width;
 434         break;
 435     default:
 436         *pi_x = ( i_width - *pi_width ) / 2;
 437     }
 438
 439     switch( p_vout->i_alignment & VOUT_ALIGN_VMASK )
 440     {
 441     case VOUT_ALIGN_TOP:
 442         *pi_y = 0;
 443         break;
 444     case VOUT_ALIGN_BOTTOM:
 445         *pi_y = i_height - *pi_height;
 446         break;
 447     default:
 448         *pi_y = ( i_height - *pi_height ) / 2;
 449     }
 450 }
 451
 452 /*****************************************************************************
 453  * vout_AllocatePicture: allocate a new picture in the heap.
 454  *****************************************************************************
 455  * This function allocates a fake direct buffer in memory, which can be
 456  * used exactly like a video buffer. The video output thread then manages
 457  * how it gets displayed.
 458  *****************************************************************************/
 459 void vout_AllocatePicture( vlc_object_t *p_this, picture_t *p_pic,
 460                            vlc_fourcc_t i_chroma,
 461                            int i_width, int i_height, int i_aspect )
 462 {
 463     int i_bytes, i_index;
 464
 465     vout_InitPicture( p_this, p_pic, i_chroma,
 466                       i_width, i_height, i_aspect );
 467
 468     /* Calculate how big the new image should be */
 469     i_bytes = p_pic->format.i_bits_per_pixel *
 470         p_pic->format.i_width * p_pic->format.i_height / 8;
 471
 472     p_pic->p_data = vlc_memalign( &p_pic->p_data_orig, 16, i_bytes );
 473
 474     if( p_pic->p_data == NULL )
 475     {
 476         p_pic->i_planes = 0;
 477         return;
 478     }
 479
 480     /* Fill the p_pixels field for each plane */
 481     p_pic->p[ 0 ].p_pixels = p_pic->p_data;
 482
 483     for( i_index = 1; i_index < p_pic->i_planes; i_index++ )
 484     {
 485         p_pic->p[i_index].p_pixels = p_pic->p[i_index-1].p_pixels
 486                                           + p_pic->p[i_index-1].i_lines
 487                                              * p_pic->p[i_index-1].i_pitch;
 488     }
 489 }
 490
 491 /*****************************************************************************
 492  * vout_InitFormat: initialise the video format fields given chroma/size.
 493  *****************************************************************************
 494  * This function initializes all the video_frame_format_t fields given the
 495  * static properties of a picture (chroma and size).
 496  *****************************************************************************/
 497 void vout_InitFormat( video_frame_format_t *p_format, vlc_fourcc_t i_chroma,
 498                       int i_width, int i_height, int i_aspect )
 499 {
 500     p_format->i_chroma   = i_chroma;
 501     p_format->i_width    = p_format->i_visible_width  = i_width;
 502     p_format->i_height   = p_format->i_visible_height = i_height;
 503     p_format->i_x_offset = p_format->i_y_offset = 0;
 504     p_format->i_aspect   = i_aspect;
 505
 506 #if 0
 507     /* Assume we have square pixels */
 508     if( i_width && i_height )
 509         p_format->i_aspect = i_width * VOUT_ASPECT_FACTOR / i_height;
 510     else
 511         p_format->i_aspect = 0;
 512 #endif
 513
 514     switch( i_chroma )
 515     {
 516         case FOURCC_I444:
 517             p_format->i_bits_per_pixel = 24;
 518             break;
 519         case FOURCC_I422:
 520         case FOURCC_YUY2:
 521             p_format->i_bits_per_pixel = 16;
 522             p_format->i_bits_per_pixel = 16;
 523             break;
 524         case FOURCC_I411:
 525         case FOURCC_YV12:
 526         case FOURCC_I420:
 527         case FOURCC_IYUV:
 528             p_format->i_bits_per_pixel = 12;
 529             break;
 530         case FOURCC_I410:
 531         case FOURCC_YVU9:
 532             p_format->i_bits_per_pixel = 9;
 533             break;
 534         case FOURCC_Y211:
 535             p_format->i_bits_per_pixel = 8;
 536             break;
 537         case FOURCC_RV32:
 538             p_format->i_bits_per_pixel = 32;
 539             break;
 540         case FOURCC_RV24:
 541             /* FIXME: Should be 24 here but x11 and our chroma conversion
 542              * routines assume 32. */
 543 #ifdef WIN32
 544             p_format->i_bits_per_pixel = 24;
 545 #else
 546             p_format->i_bits_per_pixel = 32;
 547 #endif
 548             break;
 549         case FOURCC_RV15:
 550         case FOURCC_RV16:
 551             p_format->i_bits_per_pixel = 16;
 552             break;
 553         case FOURCC_RGB2:
 554             p_format->i_bits_per_pixel = 8;
 555             break;
 556         default:
 557             p_format->i_bits_per_pixel = 0;
 558             break;
 559     }
 560 }
 561
 562 /*****************************************************************************
 563  * vout_InitPicture: initialise the picture_t fields given chroma/size.
 564  *****************************************************************************
 565  * This function initializes most of the picture_t fields given a chroma and
 566  * size. It makes the assumption that stride == width.
 567  *****************************************************************************/
 568 void vout_InitPicture( vlc_object_t *p_this, picture_t *p_pic,
 569                        vlc_fourcc_t i_chroma,
 570                        int i_width, int i_height, int i_aspect )
 571 {
 572     int i_index;
 573
 574     /* Store default values */
 575     for( i_index = 0; i_index < VOUT_MAX_PLANES; i_index++ )
 576     {
 577         p_pic->p[i_index].p_pixels = NULL;
 578         p_pic->p[i_index].i_pixel_pitch = 1;
 579     }
 580
 581     vout_InitFormat( &p_pic->format, i_chroma, i_width, i_height, i_aspect );
 582
 583     /* Calculate coordinates */
 584     switch( i_chroma )
 585     {
 586         case FOURCC_I411:
 587             p_pic->p[ Y_PLANE ].i_lines = i_height;
 588             p_pic->p[ Y_PLANE ].i_pitch = i_width;
 589             p_pic->p[ Y_PLANE ].i_visible_pitch = p_pic->p[ Y_PLANE ].i_pitch;
 590             p_pic->p[ U_PLANE ].i_lines = i_height;
 591             p_pic->p[ U_PLANE ].i_pitch = i_width / 4;
 592             p_pic->p[ U_PLANE ].i_visible_pitch = p_pic->p[ U_PLANE ].i_pitch;
 593             p_pic->p[ V_PLANE ].i_lines = i_height;
 594             p_pic->p[ V_PLANE ].i_pitch = i_width / 4;
 595             p_pic->p[ V_PLANE ].i_visible_pitch = p_pic->p[ V_PLANE ].i_pitch;
 596             p_pic->i_planes = 3;
 597             break;
 598
 599         case FOURCC_I410:
 600         case FOURCC_YVU9:
 601             p_pic->p[ Y_PLANE ].i_lines = i_height;
 602             p_pic->p[ Y_PLANE ].i_pitch = i_width;
 603             p_pic->p[ Y_PLANE ].i_visible_pitch = p_pic->p[ Y_PLANE ].i_pitch;
 604             p_pic->p[ U_PLANE ].i_lines = i_height / 4;
 605             p_pic->p[ U_PLANE ].i_pitch = i_width / 4;
 606             p_pic->p[ U_PLANE ].i_visible_pitch = p_pic->p[ U_PLANE ].i_pitch;
 607             p_pic->p[ V_PLANE ].i_lines = i_height / 4;
 608             p_pic->p[ V_PLANE ].i_pitch = i_width / 4;
 609             p_pic->p[ V_PLANE ].i_visible_pitch = p_pic->p[ V_PLANE ].i_pitch;
 610             p_pic->i_planes = 3;
 611             break;
 612
 613         case FOURCC_YV12:
 614         case FOURCC_I420:
 615         case FOURCC_IYUV:
 616             p_pic->p[ Y_PLANE ].i_lines = i_height;
 617             p_pic->p[ Y_PLANE ].i_pitch = i_width;
 618             p_pic->p[ Y_PLANE ].i_visible_pitch = p_pic->p[ Y_PLANE ].i_pitch;
 619             p_pic->p[ U_PLANE ].i_lines = i_height / 2;
 620             p_pic->p[ U_PLANE ].i_pitch = i_width / 2;
 621             p_pic->p[ U_PLANE ].i_visible_pitch = p_pic->p[ U_PLANE ].i_pitch;
 622             p_pic->p[ V_PLANE ].i_lines = i_height / 2;
 623             p_pic->p[ V_PLANE ].i_pitch = i_width / 2;
 624             p_pic->p[ V_PLANE ].i_visible_pitch = p_pic->p[ V_PLANE ].i_pitch;
 625             p_pic->i_planes = 3;
 626             break;
 627
 628         case FOURCC_I422:
 629             p_pic->p[ Y_PLANE ].i_lines = i_height;
 630             p_pic->p[ Y_PLANE ].i_pitch = i_width;
 631             p_pic->p[ Y_PLANE ].i_visible_pitch = p_pic->p[ Y_PLANE ].i_pitch;
 632             p_pic->p[ U_PLANE ].i_lines = i_height;
 633             p_pic->p[ U_PLANE ].i_pitch = i_width / 2;
 634             p_pic->p[ U_PLANE ].i_visible_pitch = p_pic->p[ U_PLANE ].i_pitch;
 635             p_pic->p[ V_PLANE ].i_lines = i_height;
 636             p_pic->p[ V_PLANE ].i_pitch = i_width / 2;
 637             p_pic->p[ V_PLANE ].i_visible_pitch = p_pic->p[ V_PLANE ].i_pitch;
 638             p_pic->i_planes = 3;
 639             break;
 640
 641         case FOURCC_I444:
 642             p_pic->p[ Y_PLANE ].i_lines = i_height;
 643             p_pic->p[ Y_PLANE ].i_pitch = i_width;
 644             p_pic->p[ Y_PLANE ].i_visible_pitch = p_pic->p[ Y_PLANE ].i_pitch;
 645             p_pic->p[ U_PLANE ].i_lines = i_height;
 646             p_pic->p[ U_PLANE ].i_pitch = i_width;
 647             p_pic->p[ U_PLANE ].i_visible_pitch = p_pic->p[ U_PLANE ].i_pitch;
 648             p_pic->p[ V_PLANE ].i_lines = i_height;
 649             p_pic->p[ V_PLANE ].i_pitch = i_width;
 650             p_pic->p[ V_PLANE ].i_visible_pitch = p_pic->p[ V_PLANE ].i_pitch;
 651             p_pic->i_planes = 3;
 652             break;
 653
 654         case FOURCC_Y211:
 655             p_pic->p->i_lines = i_height;
 656             p_pic->p->i_pitch = i_width;
 657             p_pic->p->i_visible_pitch = p_pic->p->i_pitch;
 658             p_pic->p->i_pixel_pitch = 4;
 659             p_pic->i_planes = 1;
 660             break;
 661
 662         case FOURCC_YUY2:
 663             p_pic->p->i_lines = i_height;
 664             p_pic->p->i_pitch = i_width * 2;
 665             p_pic->p->i_visible_pitch = p_pic->p->i_pitch;
 666             p_pic->p->i_pixel_pitch = 4;
 667             p_pic->i_planes = 1;
 668             break;
 669
 670         case FOURCC_RGB2:
 671             p_pic->p->i_lines = i_height;
 672             p_pic->p->i_pitch = i_width;
 673             p_pic->p->i_visible_pitch = p_pic->p->i_pitch;
 674             p_pic->p->i_pixel_pitch = 1;
 675             p_pic->i_planes = 1;
 676             break;
 677
 678         case FOURCC_RV15:
 679             p_pic->p->i_lines = i_height;
 680             p_pic->p->i_pitch = i_width * 2;
 681             p_pic->p->i_visible_pitch = p_pic->p->i_pitch;
 682             p_pic->p->i_pixel_pitch = 2;
 683 /* FIXME: p_heap isn't always reachable
 684             p_pic->p_heap->i_rmask = 0x001f;
 685             p_pic->p_heap->i_gmask = 0x03e0;
 686             p_pic->p_heap->i_bmask = 0x7c00; */
 687             p_pic->i_planes = 1;
 688             break;
 689
 690         case FOURCC_RV16:
 691             p_pic->p->i_lines = i_height;
 692             p_pic->p->i_pitch = i_width * 2;
 693             p_pic->p->i_visible_pitch = p_pic->p->i_pitch;
 694             p_pic->p->i_pixel_pitch = 2;
 695 /* FIXME: p_heap isn't always reachable
 696             p_pic->p_heap->i_rmask = 0x001f;
 697             p_pic->p_heap->i_gmask = 0x07e0;
 698             p_pic->p_heap->i_bmask = 0xf800; */
 699             p_pic->i_planes = 1;
 700             break;
 701
 702         case FOURCC_RV24:
 703             p_pic->p->i_lines = i_height;
 704
 705             /* FIXME: Should be 3 here but x11 and our chroma conversion
 706              * routines assume 4. */
 707 #ifdef WIN32
 708             p_pic->p->i_pitch = i_width * 3;
 709             p_pic->p->i_pixel_pitch = 3;
 710 #else
 711             p_pic->p->i_pitch = i_width * 4;
 712             p_pic->p->i_pixel_pitch = 4;
 713 #endif
 714             p_pic->p->i_visible_pitch = p_pic->p->i_pitch;
 715 /* FIXME: p_heap isn't always reachable
 716             p_pic->p_heap->i_rmask = 0xff0000;
 717             p_pic->p_heap->i_gmask = 0x00ff00;
 718             p_pic->p_heap->i_bmask = 0x0000ff; */
 719             p_pic->i_planes = 1;
 720             break;
 721
 722         case FOURCC_RV32:
 723             p_pic->p->i_lines = i_height;
 724             p_pic->p->i_pitch = i_width * 4;
 725             p_pic->p->i_visible_pitch = p_pic->p->i_pitch;
 726             p_pic->p->i_pixel_pitch = 4;
 727 /* FIXME: p_heap isn't always reachable
 728             p_pic->p_heap->i_rmask = 0xff0000;
 729             p_pic->p_heap->i_gmask = 0x00ff00;
 730             p_pic->p_heap->i_bmask = 0x0000ff; */
 731             p_pic->i_planes = 1;
 732             break;
 733
 734         default:
 735             msg_Err( p_this, "unknown chroma type 0x%.8x (%4.4s)",
 736                              i_chroma, (char*)&i_chroma );
 737             p_pic->i_planes = 0;
 738             return;
 739     }
 740 }
 741
 742 /*****************************************************************************
 743  * vout_ChromaCmp: compare two chroma values
 744  *****************************************************************************
 745  * This function returns 1 if the two fourcc values given as argument are
 746  * the same format (eg. UYVY/UYNV) or almost the same format (eg. I420/YV12)
 747  *****************************************************************************/
 748 int vout_ChromaCmp( vlc_fourcc_t i_chroma, vlc_fourcc_t i_amorhc )
 749 {
 750     /* If they are the same, they are the same ! */
 751     if( i_chroma == i_amorhc )
 752     {
 753         return 1;
 754     }
 755
 756     /* Check for equivalence classes */
 757     switch( i_chroma )
 758     {
 759         case FOURCC_I420:
 760         case FOURCC_IYUV:
 761         case FOURCC_YV12:
 762             switch( i_amorhc )
 763             {
 764                 case FOURCC_I420:
 765                 case FOURCC_IYUV:
 766                 case FOURCC_YV12:
 767                     return 1;
 768
 769                 default:
 770                     return 0;
 771             }
 772
 773         case FOURCC_UYVY:
 774         case FOURCC_UYNV:
 775         case FOURCC_Y422:
 776             switch( i_amorhc )
 777             {
 778                 case FOURCC_UYVY:
 779                 case FOURCC_UYNV:
 780                 case FOURCC_Y422:
 781                     return 1;
 782
 783                 default:
 784                     return 0;
 785             }
 786
 787         case FOURCC_YUY2:
 788         case FOURCC_YUNV:
 789             switch( i_amorhc )
 790             {
 791                 case FOURCC_YUY2:
 792                 case FOURCC_YUNV:
 793                     return 1;
 794
 795                 default:
 796                     return 0;
 797             }
 798
 799         default:
 800             return 0;
 801     }
 802 }
 803
 804 /* Following functions are local */
 805
 806 /*****************************************************************************
 807  * CopyPicture: copy a picture to another one
 808  *****************************************************************************
 809  * This function takes advantage of the image format, and reduces the
 810  * number of calls to memcpy() to the minimum. Source and destination
 811  * images must have same width (hence i_visible_pitch), height, and chroma.
 812  *****************************************************************************/
 813 static void CopyPicture( vout_thread_t * p_vout,
 814                          picture_t *p_src, picture_t *p_dest )
 815 {
 816     int i;
 817
 818     for( i = 0; i < p_src->i_planes ; i++ )
 819     {
 820         if( p_src->p[i].i_pitch == p_dest->p[i].i_pitch )
 821         {
 822             /* There are margins, but with the same width : perfect ! */
 823             p_vout->p_vlc->pf_memcpy(
 824                          p_dest->p[i].p_pixels, p_src->p[i].p_pixels,
 825                          p_src->p[i].i_pitch * p_src->p[i].i_lines );
 826         }
 827         else
 828         {
 829             /* We need to proceed line by line */
 830             uint8_t *p_in = p_src->p[i].p_pixels;
 831             uint8_t *p_out = p_dest->p[i].p_pixels;
 832             int i_line;
 833
 834             for( i_line = p_src->p[i].i_lines; i_line--; )
 835             {
 836                 p_vout->p_vlc->pf_memcpy( p_out, p_in,
 837                                           p_src->p[i].i_visible_pitch );
 838                 p_in += p_src->p[i].i_pitch;
 839                 p_out += p_dest->p[i].i_pitch;
 840             }
 841         }
 842     }
 843     p_dest->date = p_src->date;
 844 }