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 VideoLAN
   5  * $Id: vout_pictures.c,v 1.43 2003/10/24 21:27:07 gbazin 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( p_vout, 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
 178             p_freepic->i_refcount = 0;
 179             p_freepic->b_force = 0;
 180
 181             p_freepic->b_progressive        = b_progressive;
 182             p_freepic->i_nb_fields          = i_nb_fields;
 183             p_freepic->b_top_field_first    = b_top_field_first;
 184
 185             p_freepic->i_matrix_coefficients = 1;
 186
 187             p_vout->i_heap_size++;
 188         }
 189         else
 190         {
 191             /* Memory allocation failed : set picture as empty */
 192             p_freepic->i_status = FREE_PICTURE;
 193             p_freepic = NULL;
 194
 195             msg_Err( p_vout, "picture allocation failed" );
 196         }
 197
 198         vlc_mutex_unlock( &p_vout->picture_lock );
 199
 200         return( p_freepic );
 201     }
 202
 203     /* No free or destroyed picture could be found, but the decoder
 204      * will try again in a while. */
 205     vlc_mutex_unlock( &p_vout->picture_lock );
 206
 207     return( NULL );
 208 }
 209
 210 /*****************************************************************************
 211  * vout_DestroyPicture: remove a permanent or reserved picture from the heap
 212  *****************************************************************************
 213  * This function frees a previously reserved picture or a permanent
 214  * picture. It is meant to be used when the construction of a picture aborted.
 215  * Note that the picture will be destroyed even if it is linked !
 216  *****************************************************************************/
 217 void vout_DestroyPicture( vout_thread_t *p_vout, picture_t *p_pic )
 218 {
 219     vlc_mutex_lock( &p_vout->picture_lock );
 220
 221 #ifdef DEBUG
 222     /* Check if picture status is valid */
 223     if( (p_pic->i_status != RESERVED_PICTURE) &&
 224         (p_pic->i_status != RESERVED_DATED_PICTURE) &&
 225         (p_pic->i_status != RESERVED_DISP_PICTURE) )
 226     {
 227         msg_Err( p_vout, "picture to destroy %p has invalid status %d",
 228                          p_pic, p_pic->i_status );
 229     }
 230 #endif
 231
 232     p_pic->i_status = DESTROYED_PICTURE;
 233     p_vout->i_heap_size--;
 234
 235     vlc_mutex_unlock( &p_vout->picture_lock );
 236 }
 237
 238 /*****************************************************************************
 239  * vout_LinkPicture: increment reference counter of a picture
 240  *****************************************************************************
 241  * This function increments the reference counter of a picture in the video
 242  * heap. It needs a lock since several producer threads can access the picture.
 243  *****************************************************************************/
 244 void vout_LinkPicture( vout_thread_t *p_vout, picture_t *p_pic )
 245 {
 246     vlc_mutex_lock( &p_vout->picture_lock );
 247     p_pic->i_refcount++;
 248     vlc_mutex_unlock( &p_vout->picture_lock );
 249 }
 250
 251 /*****************************************************************************
 252  * vout_UnlinkPicture: decrement reference counter of a picture
 253  *****************************************************************************
 254  * This function decrement the reference counter of a picture in the video heap
 255  *****************************************************************************/
 256 void vout_UnlinkPicture( vout_thread_t *p_vout, picture_t *p_pic )
 257 {
 258     vlc_mutex_lock( &p_vout->picture_lock );
 259     p_pic->i_refcount--;
 260
 261     if( p_pic->i_refcount < 0 )
 262     {
 263         msg_Err( p_vout, "picture %p refcount is %i",
 264                  p_pic, p_pic->i_refcount );
 265         p_pic->i_refcount = 0;
 266     }
 267
 268     if( ( p_pic->i_refcount == 0 ) &&
 269         ( p_pic->i_status == DISPLAYED_PICTURE ) )
 270     {
 271         p_pic->i_status = DESTROYED_PICTURE;
 272         p_vout->i_heap_size--;
 273     }
 274
 275     vlc_mutex_unlock( &p_vout->picture_lock );
 276 }
 277
 278 /*****************************************************************************
 279  * vout_RenderPicture: render a picture
 280  *****************************************************************************
 281  * This function chooses whether the current picture needs to be copied
 282  * before rendering, does the subpicture magic, and tells the video output
 283  * thread which direct buffer needs to be displayed.
 284  *****************************************************************************/
 285 picture_t * vout_RenderPicture( vout_thread_t *p_vout, picture_t *p_pic,
 286                                                        subpicture_t *p_subpic )
 287 {
 288     if( p_pic == NULL )
 289     {
 290         /* XXX: subtitles */
 291
 292         return NULL;
 293     }
 294
 295     if( p_pic->i_type == DIRECT_PICTURE )
 296     {
 297         if( !p_vout->render.b_allow_modify_pics || p_pic->i_refcount )
 298         {
 299             /* Picture is in a direct buffer and is still in use,
 300              * we need to copy it to another direct buffer before
 301              * displaying it if there are subtitles. */
 302             if( p_subpic != NULL )
 303             {
 304                 /* We have subtitles. First copy the picture to
 305                  * the spare direct buffer, then render the
 306                  * subtitles. */
 307                 CopyPicture( p_vout, p_pic, PP_OUTPUTPICTURE[0] );
 308
 309                 vout_RenderSubPictures( p_vout, PP_OUTPUTPICTURE[0], p_subpic );
 310
 311                 return PP_OUTPUTPICTURE[0];
 312             }
 313
 314             /* No subtitles, picture is in a directbuffer so
 315              * we can display it directly even if it is still
 316              * in use. */
 317             return p_pic;
 318         }
 319
 320         /* Picture is in a direct buffer but isn't used by the
 321          * decoder. We can safely render subtitles on it and
 322          * display it. */
 323         vout_RenderSubPictures( p_vout, p_pic, p_subpic );
 324
 325         return p_pic;
 326     }
 327
 328     /* Not a direct buffer. We either need to copy it to a direct buffer,
 329      * or render it if the chroma isn't the same. */
 330     if( p_vout->b_direct )
 331     {
 332         /* Picture is not in a direct buffer, but is exactly the
 333          * same size as the direct buffers. A memcpy() is enough,
 334          * then render the subtitles. */
 335
 336         if( PP_OUTPUTPICTURE[0]->pf_lock )
 337             if( PP_OUTPUTPICTURE[0]->pf_lock( p_vout, PP_OUTPUTPICTURE[0] ) )
 338             {
 339                 if( PP_OUTPUTPICTURE[0]->pf_unlock )
 340                 PP_OUTPUTPICTURE[0]->pf_unlock( p_vout, PP_OUTPUTPICTURE[0] );
 341
 342                 return NULL;
 343             }
 344
 345         CopyPicture( p_vout, p_pic, PP_OUTPUTPICTURE[0] );
 346
 347         vout_RenderSubPictures( p_vout, PP_OUTPUTPICTURE[0], p_subpic );
 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_vout->p_picture[0].pf_lock )
 361         if( p_vout->p_picture[0].pf_lock( p_vout, &p_vout->p_picture[0] ) )
 362             return NULL;
 363
 364     /* Convert image to the first direct buffer */
 365     p_vout->chroma.pf_convert( p_vout, p_pic, &p_vout->p_picture[0] );
 366
 367     /* Render subpictures on the first direct buffer */
 368     vout_RenderSubPictures( p_vout, &p_vout->p_picture[0], p_subpic );
 369
 370     if( p_vout->p_picture[0].pf_unlock )
 371         p_vout->p_picture[0].pf_unlock( p_vout, &p_vout->p_picture[0] );
 372
 373     return &p_vout->p_picture[0];
 374 }
 375
 376 /*****************************************************************************
 377  * vout_PlacePicture: calculate image window coordinates
 378  *****************************************************************************
 379  * This function will be accessed by plugins. It calculates the relative
 380  * position of the output window and the image window.
 381  *****************************************************************************/
 382 void vout_PlacePicture( vout_thread_t *p_vout,
 383                         unsigned int i_width, unsigned int i_height,
 384                         unsigned int *pi_x, unsigned int *pi_y,
 385                         unsigned int *pi_width, unsigned int *pi_height )
 386 {
 387     if( (i_width <= 0) || (i_height <=0) )
 388     {
 389         *pi_width = *pi_height = *pi_x = *pi_y = 0;
 390
 391         return;
 392     }
 393
 394     if( p_vout->b_scale )
 395     {
 396         *pi_width = i_width;
 397         *pi_height = i_height;
 398     }
 399     else
 400     {
 401         *pi_width = __MIN( i_width, p_vout->render.i_width );
 402         *pi_height = __MIN( i_height, p_vout->render.i_height );
 403     }
 404
 405     if( VOUT_ASPECT_FACTOR * *pi_width / *pi_height < p_vout->render.i_aspect )
 406     {
 407         *pi_width = *pi_height * p_vout->render.i_aspect / VOUT_ASPECT_FACTOR;
 408     }
 409     else
 410     {
 411         *pi_height = *pi_width * VOUT_ASPECT_FACTOR / p_vout->render.i_aspect;
 412     }
 413
 414     if( *pi_width > i_width )
 415     {
 416         *pi_width = i_width;
 417         *pi_height = VOUT_ASPECT_FACTOR * *pi_width / p_vout->render.i_aspect;
 418     }
 419
 420     if( *pi_height > i_height )
 421     {
 422         *pi_height = i_height;
 423         *pi_width = *pi_height * p_vout->render.i_aspect / VOUT_ASPECT_FACTOR;
 424     }
 425
 426     switch( p_vout->i_alignment & VOUT_ALIGN_HMASK )
 427     {
 428     case VOUT_ALIGN_LEFT:
 429         *pi_x = 0;
 430         break;
 431     case VOUT_ALIGN_RIGHT:
 432         *pi_x = i_width - *pi_width;
 433         break;
 434     default:
 435         *pi_x = ( i_width - *pi_width ) / 2;
 436     }
 437
 438     switch( p_vout->i_alignment & VOUT_ALIGN_VMASK )
 439     {
 440     case VOUT_ALIGN_TOP:
 441         *pi_y = 0;
 442         break;
 443     case VOUT_ALIGN_BOTTOM:
 444         *pi_y = i_height - *pi_height;
 445         break;
 446     default:
 447         *pi_y = ( i_height - *pi_height ) / 2;
 448     }
 449 }
 450
 451 /*****************************************************************************
 452  * vout_AllocatePicture: allocate a new picture in the heap.
 453  *****************************************************************************
 454  * This function allocates a fake direct buffer in memory, which can be
 455  * used exactly like a video buffer. The video output thread then manages
 456  * how it gets displayed.
 457  *****************************************************************************/
 458 void vout_AllocatePicture( vout_thread_t *p_vout, picture_t *p_pic,
 459                            vlc_fourcc_t i_chroma,
 460                            int i_width, int i_height, int i_aspect )
 461 {
 462     int i_bytes, i_index;
 463
 464     vout_InitPicture( VLC_OBJECT(p_vout), p_pic, i_chroma,
 465                       i_width, i_height, i_aspect );
 466
 467     /* Calculate how big the new image should be */
 468     i_bytes = p_pic->format.i_bits_per_pixel *
 469         p_pic->format.i_width * p_pic->format.i_height / 8;
 470
 471     p_pic->p_data = vlc_memalign( &p_pic->p_data_orig, 16, i_bytes );
 472
 473     if( p_pic->p_data == NULL )
 474     {
 475         p_pic->i_planes = 0;
 476         return;
 477     }
 478
 479     /* Fill the p_pixels field for each plane */
 480     p_pic->p[ 0 ].p_pixels = p_pic->p_data;
 481
 482     for( i_index = 1; i_index < p_pic->i_planes; i_index++ )
 483     {
 484         p_pic->p[i_index].p_pixels = p_pic->p[i_index-1].p_pixels
 485                                           + p_pic->p[i_index-1].i_lines
 486                                              * p_pic->p[i_index-1].i_pitch;
 487     }
 488 }
 489
 490 /*****************************************************************************
 491  * vout_InitFormat: initialise the video format fields given chroma/size.
 492  *****************************************************************************
 493  * This function initializes all the video_frame_format_t fields given the
 494  * static properties of a picture (chroma and size).
 495  *****************************************************************************/
 496 void vout_InitFormat( video_frame_format_t *p_format, vlc_fourcc_t i_chroma,
 497                       int i_width, int i_height, int i_aspect )
 498 {
 499     p_format->i_chroma   = i_chroma;
 500     p_format->i_width    = p_format->i_visible_width  = i_width;
 501     p_format->i_height   = p_format->i_visible_height = i_height;
 502     p_format->i_x_offset = p_format->i_y_offset = 0;
 503     p_format->i_aspect   = i_aspect;
 504
 505 #if 0
 506     /* Assume we have square pixels */
 507     if( i_width && i_height )
 508         p_format->i_aspect = i_width * VOUT_ASPECT_FACTOR / i_height;
 509     else
 510         p_format->i_aspect = 0;
 511 #endif
 512
 513     switch( i_chroma )
 514     {
 515         case FOURCC_I444:
 516             p_format->i_bits_per_pixel = 24;
 517             break;
 518         case FOURCC_I422:
 519         case FOURCC_YUY2:
 520             p_format->i_bits_per_pixel = 16;
 521             p_format->i_bits_per_pixel = 16;
 522             break;
 523         case FOURCC_I411:
 524         case FOURCC_YV12:
 525         case FOURCC_I420:
 526         case FOURCC_IYUV:
 527             p_format->i_bits_per_pixel = 12;
 528             break;
 529         case FOURCC_I410:
 530             p_format->i_bits_per_pixel = 9;
 531             break;
 532         case FOURCC_Y211:
 533             p_format->i_bits_per_pixel = 8;
 534             break;
 535         case FOURCC_RV32:
 536             p_format->i_bits_per_pixel = 32;
 537             break;
 538         case FOURCC_RV24:
 539             /* FIXME: Should be 24 here but x11 and our chroma conversion
 540              * routines assume 32. */
 541 #ifdef WIN32
 542             p_format->i_bits_per_pixel = 24;
 543 #else
 544             p_format->i_bits_per_pixel = 32;
 545 #endif
 546             break;
 547         case FOURCC_RV15:
 548         case FOURCC_RV16:
 549             p_format->i_bits_per_pixel = 16;
 550             break;
 551         case FOURCC_RGB2:
 552             p_format->i_bits_per_pixel = 8;
 553             break;
 554         default:
 555             p_format->i_bits_per_pixel = 0;
 556             break;
 557     }
 558 }
 559
 560 /*****************************************************************************
 561  * vout_InitPicture: initialise the picture_t fields given chroma/size.
 562  *****************************************************************************
 563  * This function initializes most of the picture_t fields given a chroma and
 564  * size. It makes the assumption that stride == width.
 565  *****************************************************************************/
 566 void vout_InitPicture( vlc_object_t *p_this, picture_t *p_pic,
 567                        vlc_fourcc_t i_chroma,
 568                        int i_width, int i_height, int i_aspect )
 569 {
 570     int i_index;
 571
 572     /* Store default values */
 573     for( i_index = 0; i_index < VOUT_MAX_PLANES; i_index++ )
 574     {
 575         p_pic->p[i_index].p_pixels = NULL;
 576         p_pic->p[i_index].i_pixel_pitch = 1;
 577     }
 578
 579     vout_InitFormat( &p_pic->format, i_chroma, i_width, i_height, i_aspect );
 580
 581     /* Calculate coordinates */
 582     switch( i_chroma )
 583     {
 584         case FOURCC_I411:
 585             p_pic->p[ Y_PLANE ].i_lines = i_height;
 586             p_pic->p[ Y_PLANE ].i_pitch = i_width;
 587             p_pic->p[ Y_PLANE ].i_visible_pitch = p_pic->p[ Y_PLANE ].i_pitch;
 588             p_pic->p[ U_PLANE ].i_lines = i_height;
 589             p_pic->p[ U_PLANE ].i_pitch = i_width / 4;
 590             p_pic->p[ U_PLANE ].i_visible_pitch = p_pic->p[ U_PLANE ].i_pitch;
 591             p_pic->p[ V_PLANE ].i_lines = i_height;
 592             p_pic->p[ V_PLANE ].i_pitch = i_width / 4;
 593             p_pic->p[ V_PLANE ].i_visible_pitch = p_pic->p[ V_PLANE ].i_pitch;
 594             p_pic->i_planes = 3;
 595             break;
 596
 597         case FOURCC_I410:
 598             p_pic->p[ Y_PLANE ].i_lines = i_height;
 599             p_pic->p[ Y_PLANE ].i_pitch = i_width;
 600             p_pic->p[ Y_PLANE ].i_visible_pitch = p_pic->p[ Y_PLANE ].i_pitch;
 601             p_pic->p[ U_PLANE ].i_lines = i_height / 4;
 602             p_pic->p[ U_PLANE ].i_pitch = i_width / 4;
 603             p_pic->p[ U_PLANE ].i_visible_pitch = p_pic->p[ U_PLANE ].i_pitch;
 604             p_pic->p[ V_PLANE ].i_lines = i_height / 4;
 605             p_pic->p[ V_PLANE ].i_pitch = i_width / 4;
 606             p_pic->p[ V_PLANE ].i_visible_pitch = p_pic->p[ V_PLANE ].i_pitch;
 607             p_pic->i_planes = 3;
 608             break;
 609
 610         case FOURCC_YV12:
 611         case FOURCC_I420:
 612         case FOURCC_IYUV:
 613             p_pic->p[ Y_PLANE ].i_lines = i_height;
 614             p_pic->p[ Y_PLANE ].i_pitch = i_width;
 615             p_pic->p[ Y_PLANE ].i_visible_pitch = p_pic->p[ Y_PLANE ].i_pitch;
 616             p_pic->p[ U_PLANE ].i_lines = i_height / 2;
 617             p_pic->p[ U_PLANE ].i_pitch = i_width / 2;
 618             p_pic->p[ U_PLANE ].i_visible_pitch = p_pic->p[ U_PLANE ].i_pitch;
 619             p_pic->p[ V_PLANE ].i_lines = i_height / 2;
 620             p_pic->p[ V_PLANE ].i_pitch = i_width / 2;
 621             p_pic->p[ V_PLANE ].i_visible_pitch = p_pic->p[ V_PLANE ].i_pitch;
 622             p_pic->i_planes = 3;
 623             break;
 624
 625         case FOURCC_I422:
 626             p_pic->p[ Y_PLANE ].i_lines = i_height;
 627             p_pic->p[ Y_PLANE ].i_pitch = i_width;
 628             p_pic->p[ Y_PLANE ].i_visible_pitch = p_pic->p[ Y_PLANE ].i_pitch;
 629             p_pic->p[ U_PLANE ].i_lines = i_height;
 630             p_pic->p[ U_PLANE ].i_pitch = i_width / 2;
 631             p_pic->p[ U_PLANE ].i_visible_pitch = p_pic->p[ U_PLANE ].i_pitch;
 632             p_pic->p[ V_PLANE ].i_lines = i_height;
 633             p_pic->p[ V_PLANE ].i_pitch = i_width / 2;
 634             p_pic->p[ V_PLANE ].i_visible_pitch = p_pic->p[ V_PLANE ].i_pitch;
 635             p_pic->i_planes = 3;
 636             break;
 637
 638         case FOURCC_I444:
 639             p_pic->p[ Y_PLANE ].i_lines = i_height;
 640             p_pic->p[ Y_PLANE ].i_pitch = i_width;
 641             p_pic->p[ Y_PLANE ].i_visible_pitch = p_pic->p[ Y_PLANE ].i_pitch;
 642             p_pic->p[ U_PLANE ].i_lines = i_height;
 643             p_pic->p[ U_PLANE ].i_pitch = i_width;
 644             p_pic->p[ U_PLANE ].i_visible_pitch = p_pic->p[ U_PLANE ].i_pitch;
 645             p_pic->p[ V_PLANE ].i_lines = i_height;
 646             p_pic->p[ V_PLANE ].i_pitch = i_width;
 647             p_pic->p[ V_PLANE ].i_visible_pitch = p_pic->p[ V_PLANE ].i_pitch;
 648             p_pic->i_planes = 3;
 649             break;
 650
 651         case FOURCC_Y211:
 652             p_pic->p->i_lines = i_height;
 653             p_pic->p->i_pitch = i_width;
 654             p_pic->p->i_visible_pitch = p_pic->p->i_pitch;
 655             p_pic->p->i_pixel_pitch = 4;
 656             p_pic->i_planes = 1;
 657             break;
 658
 659         case FOURCC_YUY2:
 660             p_pic->p->i_lines = i_height;
 661             p_pic->p->i_pitch = i_width * 2;
 662             p_pic->p->i_visible_pitch = p_pic->p->i_pitch;
 663             p_pic->p->i_pixel_pitch = 4;
 664             p_pic->i_planes = 1;
 665             break;
 666
 667         case FOURCC_RGB2:
 668             p_pic->p->i_lines = i_height;
 669             p_pic->p->i_pitch = i_width;
 670             p_pic->p->i_visible_pitch = p_pic->p->i_pitch;
 671             p_pic->p->i_pixel_pitch = 1;
 672             p_pic->i_planes = 1;
 673             break;
 674
 675         case FOURCC_RV15:
 676             p_pic->p->i_lines = i_height;
 677             p_pic->p->i_pitch = i_width * 2;
 678             p_pic->p->i_visible_pitch = p_pic->p->i_pitch;
 679             p_pic->p->i_pixel_pitch = 2;
 680 /* FIXME: p_heap isn't always reachable
 681             p_pic->p_heap->i_rmask = 0x001f;
 682             p_pic->p_heap->i_gmask = 0x03e0;
 683             p_pic->p_heap->i_bmask = 0x7c00; */
 684             p_pic->i_planes = 1;
 685             break;
 686
 687         case FOURCC_RV16:
 688             p_pic->p->i_lines = i_height;
 689             p_pic->p->i_pitch = i_width * 2;
 690             p_pic->p->i_visible_pitch = p_pic->p->i_pitch;
 691             p_pic->p->i_pixel_pitch = 2;
 692 /* FIXME: p_heap isn't always reachable
 693             p_pic->p_heap->i_rmask = 0x001f;
 694             p_pic->p_heap->i_gmask = 0x07e0;
 695             p_pic->p_heap->i_bmask = 0xf800; */
 696             p_pic->i_planes = 1;
 697             break;
 698
 699         case FOURCC_RV24:
 700             p_pic->p->i_lines = i_height;
 701
 702             /* FIXME: Should be 3 here but x11 and our chroma conversion
 703              * routines assume 4. */
 704 #ifdef WIN32
 705             p_pic->p->i_pitch = i_width * 3;
 706             p_pic->p->i_pixel_pitch = 3;
 707 #else
 708             p_pic->p->i_pitch = i_width * 4;
 709             p_pic->p->i_pixel_pitch = 4;
 710 #endif
 711             p_pic->p->i_visible_pitch = p_pic->p->i_pitch;
 712 /* FIXME: p_heap isn't always reachable
 713             p_pic->p_heap->i_rmask = 0xff0000;
 714             p_pic->p_heap->i_gmask = 0x00ff00;
 715             p_pic->p_heap->i_bmask = 0x0000ff; */
 716             p_pic->i_planes = 1;
 717             break;
 718
 719         case FOURCC_RV32:
 720             p_pic->p->i_lines = i_height;
 721             p_pic->p->i_pitch = i_width * 4;
 722             p_pic->p->i_visible_pitch = p_pic->p->i_pitch;
 723             p_pic->p->i_pixel_pitch = 4;
 724 /* FIXME: p_heap isn't always reachable
 725             p_pic->p_heap->i_rmask = 0xff0000;
 726             p_pic->p_heap->i_gmask = 0x00ff00;
 727             p_pic->p_heap->i_bmask = 0x0000ff; */
 728             p_pic->i_planes = 1;
 729             break;
 730
 731         default:
 732             msg_Err( p_this, "unknown chroma type 0x%.8x (%4.4s)",
 733                              i_chroma, (char*)&i_chroma );
 734             p_pic->i_planes = 0;
 735             return;
 736     }
 737 }
 738
 739 /*****************************************************************************
 740  * vout_ChromaCmp: compare two chroma values
 741  *****************************************************************************
 742  * This function returns 1 if the two fourcc values given as argument are
 743  * the same format (eg. UYVY/UYNV) or almost the same format (eg. I420/YV12)
 744  *****************************************************************************/
 745 int vout_ChromaCmp( vlc_fourcc_t i_chroma, vlc_fourcc_t i_amorhc )
 746 {
 747     /* If they are the same, they are the same ! */
 748     if( i_chroma == i_amorhc )
 749     {
 750         return 1;
 751     }
 752
 753     /* Check for equivalence classes */
 754     switch( i_chroma )
 755     {
 756         case FOURCC_I420:
 757         case FOURCC_IYUV:
 758         case FOURCC_YV12:
 759             switch( i_amorhc )
 760             {
 761                 case FOURCC_I420:
 762                 case FOURCC_IYUV:
 763                 case FOURCC_YV12:
 764                     return 1;
 765
 766                 default:
 767                     return 0;
 768             }
 769
 770         case FOURCC_UYVY:
 771         case FOURCC_UYNV:
 772         case FOURCC_Y422:
 773             switch( i_amorhc )
 774             {
 775                 case FOURCC_UYVY:
 776                 case FOURCC_UYNV:
 777                 case FOURCC_Y422:
 778                     return 1;
 779
 780                 default:
 781                     return 0;
 782             }
 783
 784         case FOURCC_YUY2:
 785         case FOURCC_YUNV:
 786             switch( i_amorhc )
 787             {
 788                 case FOURCC_YUY2:
 789                 case FOURCC_YUNV:
 790                     return 1;
 791
 792                 default:
 793                     return 0;
 794             }
 795
 796         default:
 797             return 0;
 798     }
 799 }
 800
 801 /* Following functions are local */
 802
 803 /*****************************************************************************
 804  * CopyPicture: copy a picture to another one
 805  *****************************************************************************
 806  * This function takes advantage of the image format, and reduces the
 807  * number of calls to memcpy() to the minimum. Source and destination
 808  * images must have same width (hence i_visible_pitch), height, and chroma.
 809  *****************************************************************************/
 810 static void CopyPicture( vout_thread_t * p_vout,
 811                          picture_t *p_src, picture_t *p_dest )
 812 {
 813     int i;
 814
 815     for( i = 0; i < p_src->i_planes ; i++ )
 816     {
 817         if( p_src->p[i].i_pitch == p_dest->p[i].i_pitch )
 818         {
 819             /* There are margins, but with the same width : perfect ! */
 820             p_vout->p_vlc->pf_memcpy(
 821                          p_dest->p[i].p_pixels, p_src->p[i].p_pixels,
 822                          p_src->p[i].i_pitch * p_src->p[i].i_lines );
 823         }
 824         else
 825         {
 826             /* We need to proceed line by line */
 827             uint8_t *p_in = p_src->p[i].p_pixels;
 828             uint8_t *p_out = p_dest->p[i].p_pixels;
 829             int i_line;
 830
 831             for( i_line = p_src->p[i].i_lines; i_line--; )
 832             {
 833                 p_vout->p_vlc->pf_memcpy( p_out, p_in,
 834                                           p_src->p[i].i_visible_pitch );
 835                 p_in += p_src->p[i].i_pitch;
 836                 p_out += p_dest->p[i].i_pitch;
 837             }
 838         }
 839     }
 840     p_dest->date = p_src->date;
 841 }