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

   1 /*****************************************************************************
   2  * vout_pictures.c : picture management functions
   3  *****************************************************************************
   4  * Copyright (C) 2000-2004 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Vincent Seguin <seguin@via.ecp.fr>
   8  *          Samuel Hocevar <sam@zoy.org>
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  23  *****************************************************************************/
  24
  25 /*****************************************************************************
  26  * Preamble
  27  *****************************************************************************/
  28
  29 #ifdef HAVE_CONFIG_H
  30 # include "config.h"
  31 #endif
  32
  33 #include <vlc_common.h>
  34 #include <vlc_vout.h>
  35 #include <vlc_osd.h>
  36 #include <vlc_filter.h>
  37 #include "vout_pictures.h"
  38
  39 #include <assert.h>
  40
  41 /**
  42  * Display a picture
  43  *
  44  * Remove the reservation flag of a picture, which will cause it to be ready
  45  * for display. The picture won't be displayed until vout_DatePicture has been
  46  * called.
  47  */
  48 void vout_DisplayPicture( vout_thread_t *p_vout, picture_t *p_pic )
  49 {
  50     vlc_mutex_lock( &p_vout->picture_lock );
  51     switch( p_pic->i_status )
  52     {
  53     case RESERVED_PICTURE:
  54         p_pic->i_status = RESERVED_DISP_PICTURE;
  55         break;
  56     case RESERVED_DATED_PICTURE:
  57         p_pic->i_status = READY_PICTURE;
  58         break;
  59     default:
  60         msg_Err( p_vout, "picture to display %p has invalid status %d",
  61                          p_pic, p_pic->i_status );
  62         break;
  63     }
  64
  65     vlc_mutex_unlock( &p_vout->picture_lock );
  66 }
  67
  68 /**
  69  * Date a picture
  70  *
  71  * Remove the reservation flag of a picture, which will cause it to be ready
  72  * for display. The picture won't be displayed until vout_DisplayPicture has
  73  * been called.
  74  * \param p_vout The vout in question
  75  * \param p_pic The picture to date
  76  * \param date The date to display the picture
  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  * 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 int vout_CountPictureAvailable( vout_thread_t *p_vout )
 110 {
 111     int i_free = 0;
 112     int i_pic;
 113
 114     vlc_mutex_lock( &p_vout->picture_lock );
 115     for( i_pic = 0; i_pic < I_RENDERPICTURES; i_pic++ )
 116     {
 117         picture_t *p_pic = PP_RENDERPICTURE[(p_vout->render.i_last_used_pic + i_pic + 1) % I_RENDERPICTURES];
 118
 119         switch( p_pic->i_status )
 120         {
 121             case DESTROYED_PICTURE:
 122                 i_free++;
 123                 break;
 124
 125             case FREE_PICTURE:
 126                 i_free++;
 127                 break;
 128
 129             default:
 130                 break;
 131         }
 132     }
 133     vlc_mutex_unlock( &p_vout->picture_lock );
 134
 135     return i_free;
 136 }
 137
 138 picture_t *vout_CreatePicture( vout_thread_t *p_vout,
 139                                bool b_progressive,
 140                                bool b_top_field_first,
 141                                unsigned int i_nb_fields )
 142 {
 143     int         i_pic;                                      /* picture index */
 144     picture_t * p_pic;
 145     picture_t * p_freepic = NULL;                      /* first free picture */
 146
 147     /* Get lock */
 148     vlc_mutex_lock( &p_vout->picture_lock );
 149
 150     /*
 151      * Look for an empty place in the picture heap.
 152      */
 153     for( i_pic = 0; i_pic < I_RENDERPICTURES; i_pic++ )
 154     {
 155         p_pic = PP_RENDERPICTURE[(p_vout->render.i_last_used_pic + i_pic + 1)
 156                                  % I_RENDERPICTURES];
 157
 158         switch( p_pic->i_status )
 159         {
 160             case DESTROYED_PICTURE:
 161                 /* Memory will not be reallocated, and function can end
 162                  * immediately - this is the best possible case, since no
 163                  * memory allocation needs to be done */
 164                 p_pic->i_status   = RESERVED_PICTURE;
 165                 p_pic->i_refcount = 0;
 166                 p_pic->b_force    = 0;
 167
 168                 p_pic->b_progressive        = b_progressive;
 169                 p_pic->i_nb_fields          = i_nb_fields;
 170                 p_pic->b_top_field_first    = b_top_field_first;
 171
 172                 p_vout->i_heap_size++;
 173                 p_vout->render.i_last_used_pic =
 174                     ( p_vout->render.i_last_used_pic + i_pic + 1 )
 175                     % I_RENDERPICTURES;
 176                 vlc_mutex_unlock( &p_vout->picture_lock );
 177                 return( p_pic );
 178
 179             case FREE_PICTURE:
 180                 /* Picture is empty and ready for allocation */
 181                 p_vout->render.i_last_used_pic =
 182                     ( p_vout->render.i_last_used_pic + i_pic + 1 )
 183                     % I_RENDERPICTURES;
 184                 p_freepic = p_pic;
 185                 break;
 186
 187             default:
 188                 break;
 189         }
 190     }
 191
 192     /*
 193      * Prepare picture
 194      */
 195     if( p_freepic != NULL )
 196     {
 197         vout_AllocatePicture( VLC_OBJECT(p_vout),
 198                               p_freepic, p_vout->render.i_chroma,
 199                               p_vout->render.i_width, p_vout->render.i_height,
 200                               p_vout->render.i_aspect );
 201
 202         if( p_freepic->i_planes )
 203         {
 204             /* Copy picture information, set some default values */
 205             p_freepic->i_status   = RESERVED_PICTURE;
 206             p_freepic->i_type     = MEMORY_PICTURE;
 207             p_freepic->b_slow     = 0;
 208
 209             p_freepic->i_refcount = 0;
 210             p_freepic->b_force = 0;
 211
 212             p_freepic->b_progressive        = b_progressive;
 213             p_freepic->i_nb_fields          = i_nb_fields;
 214             p_freepic->b_top_field_first    = b_top_field_first;
 215
 216             p_freepic->i_matrix_coefficients = 1;
 217
 218             p_vout->i_heap_size++;
 219         }
 220         else
 221         {
 222             /* Memory allocation failed : set picture as empty */
 223             p_freepic->i_status = FREE_PICTURE;
 224             p_freepic = NULL;
 225
 226             msg_Err( p_vout, "picture allocation failed" );
 227         }
 228
 229         vlc_mutex_unlock( &p_vout->picture_lock );
 230
 231         return( p_freepic );
 232     }
 233
 234     /* No free or destroyed picture could be found, but the decoder
 235      * will try again in a while. */
 236     vlc_mutex_unlock( &p_vout->picture_lock );
 237
 238     return( NULL );
 239 }
 240
 241 /**
 242  * Remove a permanent or reserved picture from the heap
 243  *
 244  * This function frees a previously reserved picture or a permanent
 245  * picture. It is meant to be used when the construction of a picture aborted.
 246  * Note that the picture will be destroyed even if it is linked !
 247  */
 248 void vout_DestroyPicture( vout_thread_t *p_vout, picture_t *p_pic )
 249 {
 250     vlc_mutex_lock( &p_vout->picture_lock );
 251
 252 #ifndef NDEBUG
 253     /* Check if picture status is valid */
 254     if( (p_pic->i_status != RESERVED_PICTURE) &&
 255         (p_pic->i_status != RESERVED_DATED_PICTURE) &&
 256         (p_pic->i_status != RESERVED_DISP_PICTURE) )
 257     {
 258         msg_Err( p_vout, "picture to destroy %p has invalid status %d",
 259                          p_pic, p_pic->i_status );
 260     }
 261 #endif
 262
 263     p_pic->i_status = DESTROYED_PICTURE;
 264     p_vout->i_heap_size--;
 265
 266     vlc_mutex_unlock( &p_vout->picture_lock );
 267 }
 268
 269 /**
 270  * Increment reference counter of a picture
 271  *
 272  * This function increments the reference counter of a picture in the video
 273  * heap. It needs a lock since several producer threads can access the picture.
 274  */
 275 void vout_LinkPicture( vout_thread_t *p_vout, picture_t *p_pic )
 276 {
 277     vlc_mutex_lock( &p_vout->picture_lock );
 278     p_pic->i_refcount++;
 279     vlc_mutex_unlock( &p_vout->picture_lock );
 280 }
 281
 282 /**
 283  * Decrement reference counter of a picture
 284  *
 285  * This function decrement the reference counter of a picture in the video heap
 286  */
 287 void vout_UnlinkPicture( vout_thread_t *p_vout, picture_t *p_pic )
 288 {
 289     vlc_mutex_lock( &p_vout->picture_lock );
 290     p_pic->i_refcount--;
 291
 292     if( ( p_pic->i_refcount == 0 ) &&
 293         ( p_pic->i_status == DISPLAYED_PICTURE ) )
 294     {
 295         p_pic->i_status = DESTROYED_PICTURE;
 296         p_vout->i_heap_size--;
 297     }
 298
 299     vlc_mutex_unlock( &p_vout->picture_lock );
 300 }
 301
 302 /**
 303  * Render a picture
 304  *
 305  * This function chooses whether the current picture needs to be copied
 306  * before rendering, does the subpicture magic, and tells the video output
 307  * thread which direct buffer needs to be displayed.
 308  */
 309 picture_t * vout_RenderPicture( vout_thread_t *p_vout, picture_t *p_pic,
 310                                                        subpicture_t *p_subpic )
 311 {
 312     int i_scale_width, i_scale_height;
 313
 314     if( p_pic == NULL )
 315     {
 316         /* XXX: subtitles */
 317         return NULL;
 318     }
 319
 320     i_scale_width = p_vout->fmt_out.i_visible_width * 1000 /
 321         p_vout->fmt_in.i_visible_width;
 322     i_scale_height = p_vout->fmt_out.i_visible_height * 1000 /
 323         p_vout->fmt_in.i_visible_height;
 324
 325     if( p_pic->i_type == DIRECT_PICTURE )
 326     {
 327         if( !p_vout->render.b_allow_modify_pics || p_pic->i_refcount ||
 328             p_pic->b_force )
 329         {
 330             /* Picture is in a direct buffer and is still in use,
 331              * we need to copy it to another direct buffer before
 332              * displaying it if there are subtitles. */
 333             if( p_subpic != NULL )
 334             {
 335                 /* We have subtitles. First copy the picture to
 336                  * the spare direct buffer, then render the
 337                  * subtitles. */
 338                 vout_CopyPicture( p_vout, PP_OUTPUTPICTURE[0], p_pic );
 339
 340                 spu_RenderSubpictures( p_vout->p_spu, &p_vout->fmt_out,
 341                                        PP_OUTPUTPICTURE[0], p_pic, p_subpic,
 342                                        i_scale_width, i_scale_height );
 343
 344                 return PP_OUTPUTPICTURE[0];
 345             }
 346
 347             /* No subtitles, picture is in a directbuffer so
 348              * we can display it directly even if it is still
 349              * in use. */
 350             return p_pic;
 351         }
 352
 353         /* Picture is in a direct buffer but isn't used by the
 354          * decoder. We can safely render subtitles on it and
 355          * display it. */
 356         spu_RenderSubpictures( p_vout->p_spu, &p_vout->fmt_out, p_pic, p_pic,
 357                                p_subpic, i_scale_width, i_scale_height );
 358
 359         return p_pic;
 360     }
 361
 362     /* Not a direct buffer. We either need to copy it to a direct buffer,
 363      * or render it if the chroma isn't the same. */
 364     if( p_vout->b_direct )
 365     {
 366         /* Picture is not in a direct buffer, but is exactly the
 367          * same size as the direct buffers. A memcpy() is enough,
 368          * then render the subtitles. */
 369
 370         if( PP_OUTPUTPICTURE[0]->pf_lock )
 371             if( PP_OUTPUTPICTURE[0]->pf_lock( p_vout, PP_OUTPUTPICTURE[0] ) )
 372                 return NULL;
 373
 374         vout_CopyPicture( p_vout, PP_OUTPUTPICTURE[0], p_pic );
 375         spu_RenderSubpictures( p_vout->p_spu, &p_vout->fmt_out,
 376                                PP_OUTPUTPICTURE[0], p_pic,
 377                                p_subpic, i_scale_width, i_scale_height );
 378
 379         if( PP_OUTPUTPICTURE[0]->pf_unlock )
 380             PP_OUTPUTPICTURE[0]->pf_unlock( p_vout, PP_OUTPUTPICTURE[0] );
 381
 382         return PP_OUTPUTPICTURE[0];
 383     }
 384
 385     /* Picture is not in a direct buffer, and needs to be converted to
 386      * another size/chroma. Then the subtitles need to be rendered as
 387      * well. This usually means software YUV, or hardware YUV with a
 388      * different chroma. */
 389
 390     if( p_subpic != NULL && p_vout->p_picture[0].b_slow )
 391     {
 392         /* The picture buffer is in slow memory. We'll use
 393          * the "2 * VOUT_MAX_PICTURES + 1" picture as a temporary
 394          * one for subpictures rendering. */
 395         picture_t *p_tmp_pic = &p_vout->p_picture[2 * VOUT_MAX_PICTURES];
 396         if( p_tmp_pic->i_status == FREE_PICTURE )
 397         {
 398             vout_AllocatePicture( VLC_OBJECT(p_vout),
 399                                   p_tmp_pic, p_vout->fmt_out.i_chroma,
 400                                   p_vout->fmt_out.i_width,
 401                                   p_vout->fmt_out.i_height,
 402                                   p_vout->fmt_out.i_aspect );
 403             p_tmp_pic->i_type = MEMORY_PICTURE;
 404             p_tmp_pic->i_status = RESERVED_PICTURE;
 405             /* some modules (such as blend)  needs to know the extra information in picture heap */
 406             p_tmp_pic->p_heap = &p_vout->output;
 407         }
 408
 409         /* Convert image to the first direct buffer */
 410         p_vout->p_chroma->p_owner = (filter_owner_sys_t *)p_tmp_pic;
 411         p_vout->p_chroma->pf_video_filter( p_vout->p_chroma, p_pic );
 412
 413         /* Render subpictures on the first direct buffer */
 414         spu_RenderSubpictures( p_vout->p_spu, &p_vout->fmt_out, p_tmp_pic,
 415                                p_tmp_pic, p_subpic,
 416                                i_scale_width, i_scale_height );
 417
 418         if( p_vout->p_picture[0].pf_lock )
 419             if( p_vout->p_picture[0].pf_lock( p_vout, &p_vout->p_picture[0] ) )
 420                 return NULL;
 421
 422         vout_CopyPicture( p_vout, &p_vout->p_picture[0], p_tmp_pic );
 423     }
 424     else
 425     {
 426         if( p_vout->p_picture[0].pf_lock )
 427             if( p_vout->p_picture[0].pf_lock( p_vout, &p_vout->p_picture[0] ) )
 428                 return NULL;
 429
 430         /* Convert image to the first direct buffer */
 431         p_vout->p_chroma->p_owner = (filter_owner_sys_t *)&p_vout->p_picture[0];
 432         p_vout->p_chroma->pf_video_filter( p_vout->p_chroma, p_pic );
 433
 434         /* Render subpictures on the first direct buffer */
 435         spu_RenderSubpictures( p_vout->p_spu, &p_vout->fmt_out,
 436                                &p_vout->p_picture[0], &p_vout->p_picture[0],
 437                                p_subpic, i_scale_width, i_scale_height );
 438     }
 439
 440     if( p_vout->p_picture[0].pf_unlock )
 441         p_vout->p_picture[0].pf_unlock( p_vout, &p_vout->p_picture[0] );
 442
 443     return &p_vout->p_picture[0];
 444 }
 445
 446 /**
 447  * Calculate image window coordinates
 448  *
 449  * This function will be accessed by plugins. It calculates the relative
 450  * position of the output window and the image window.
 451  */
 452 void vout_PlacePicture( vout_thread_t *p_vout,
 453                         unsigned int i_width, unsigned int i_height,
 454                         unsigned int *pi_x, unsigned int *pi_y,
 455                         unsigned int *pi_width, unsigned int *pi_height )
 456 {
 457     if( (i_width <= 0) || (i_height <=0) )
 458     {
 459         *pi_width = *pi_height = *pi_x = *pi_y = 0;
 460         return;
 461     }
 462
 463     if( p_vout->b_scale )
 464     {
 465         *pi_width = i_width;
 466         *pi_height = i_height;
 467     }
 468     else
 469     {
 470         *pi_width = __MIN( i_width, p_vout->fmt_in.i_visible_width );
 471         *pi_height = __MIN( i_height, p_vout->fmt_in.i_visible_height );
 472     }
 473
 474     if( p_vout->fmt_in.i_visible_width * (int64_t)p_vout->fmt_in.i_sar_num *
 475         *pi_height / p_vout->fmt_in.i_visible_height /
 476         p_vout->fmt_in.i_sar_den > *pi_width )
 477     {
 478         *pi_height = p_vout->fmt_in.i_visible_height *
 479             (int64_t)p_vout->fmt_in.i_sar_den * *pi_width /
 480             p_vout->fmt_in.i_visible_width / p_vout->fmt_in.i_sar_num;
 481     }
 482     else
 483     {
 484         *pi_width = p_vout->fmt_in.i_visible_width *
 485             (int64_t)p_vout->fmt_in.i_sar_num * *pi_height /
 486             p_vout->fmt_in.i_visible_height / p_vout->fmt_in.i_sar_den;
 487     }
 488
 489     switch( p_vout->i_alignment & VOUT_ALIGN_HMASK )
 490     {
 491     case VOUT_ALIGN_LEFT:
 492         *pi_x = 0;
 493         break;
 494     case VOUT_ALIGN_RIGHT:
 495         *pi_x = i_width - *pi_width;
 496         break;
 497     default:
 498         *pi_x = ( i_width - *pi_width ) / 2;
 499     }
 500
 501     switch( p_vout->i_alignment & VOUT_ALIGN_VMASK )
 502     {
 503     case VOUT_ALIGN_TOP:
 504         *pi_y = 0;
 505         break;
 506     case VOUT_ALIGN_BOTTOM:
 507         *pi_y = i_height - *pi_height;
 508         break;
 509     default:
 510         *pi_y = ( i_height - *pi_height ) / 2;
 511     }
 512 }
 513
 514 /**
 515  * Allocate a new picture in the heap.
 516  *
 517  * This function allocates a fake direct buffer in memory, which can be
 518  * used exactly like a video buffer. The video output thread then manages
 519  * how it gets displayed.
 520  */
 521 int __vout_AllocatePicture( vlc_object_t *p_this, picture_t *p_pic,
 522                             vlc_fourcc_t i_chroma,
 523                             int i_width, int i_height, int i_aspect )
 524 {
 525     int i_bytes, i_index, i_width_aligned, i_height_aligned;
 526
 527     /* Make sure the real dimensions are a multiple of 16 */
 528     i_width_aligned = (i_width + 15) >> 4 << 4;
 529     i_height_aligned = (i_height + 15) >> 4 << 4;
 530
 531     if( vout_InitPicture( p_this, p_pic, i_chroma,
 532                           i_width, i_height, i_aspect ) != VLC_SUCCESS )
 533     {
 534         p_pic->i_planes = 0;
 535         return VLC_EGENERIC;
 536     }
 537
 538     /* Calculate how big the new image should be */
 539     i_bytes = p_pic->format.i_bits_per_pixel *
 540         i_width_aligned * i_height_aligned / 8;
 541
 542     p_pic->p_data = vlc_memalign( &p_pic->p_data_orig, 16, i_bytes );
 543
 544     if( p_pic->p_data == NULL )
 545     {
 546         p_pic->i_planes = 0;
 547         return VLC_EGENERIC;
 548     }
 549
 550     /* Fill the p_pixels field for each plane */
 551     p_pic->p[ 0 ].p_pixels = p_pic->p_data;
 552
 553     for( i_index = 1; i_index < p_pic->i_planes; i_index++ )
 554     {
 555         p_pic->p[i_index].p_pixels = p_pic->p[i_index-1].p_pixels +
 556             p_pic->p[i_index-1].i_lines * p_pic->p[i_index-1].i_pitch;
 557     }
 558
 559     return VLC_SUCCESS;
 560 }
 561
 562 /**
 563  * Initialise the video format fields given chroma/size.
 564  *
 565  * This function initializes all the video_frame_format_t fields given the
 566  * static properties of a picture (chroma and size).
 567  * \param p_format Pointer to the format structure to initialize
 568  * \param i_chroma Chroma to set
 569  * \param i_width Width to set
 570  * \param i_height Height to set
 571  * \param i_aspect Aspect ratio
 572  */
 573 void vout_InitFormat( video_frame_format_t *p_format, vlc_fourcc_t i_chroma,
 574                       int i_width, int i_height, int i_aspect )
 575 {
 576     p_format->i_chroma   = i_chroma;
 577     p_format->i_width    = p_format->i_visible_width  = i_width;
 578     p_format->i_height   = p_format->i_visible_height = i_height;
 579     p_format->i_x_offset = p_format->i_y_offset = 0;
 580     p_format->i_aspect   = i_aspect;
 581
 582 #if 0
 583     /* Assume we have square pixels */
 584     if( i_width && i_height )
 585         p_format->i_aspect = i_width * VOUT_ASPECT_FACTOR / i_height;
 586     else
 587         p_format->i_aspect = 0;
 588 #endif
 589
 590     switch( i_chroma )
 591     {
 592         case FOURCC_YUVA:
 593             p_format->i_bits_per_pixel = 32;
 594             break;
 595         case FOURCC_I444:
 596         case FOURCC_J444:
 597             p_format->i_bits_per_pixel = 24;
 598             break;
 599         case FOURCC_I422:
 600         case FOURCC_YUY2:
 601         case FOURCC_UYVY:
 602         case FOURCC_J422:
 603             p_format->i_bits_per_pixel = 16;
 604             break;
 605         case FOURCC_I411:
 606         case FOURCC_YV12:
 607         case FOURCC_I420:
 608         case FOURCC_J420:
 609         case FOURCC_IYUV:
 610             p_format->i_bits_per_pixel = 12;
 611             break;
 612         case FOURCC_I410:
 613         case FOURCC_YVU9:
 614             p_format->i_bits_per_pixel = 9;
 615             break;
 616         case FOURCC_Y211:
 617             p_format->i_bits_per_pixel = 8;
 618             break;
 619         case FOURCC_YUVP:
 620             p_format->i_bits_per_pixel = 8;
 621             break;
 622
 623         case FOURCC_RV32:
 624         case FOURCC_RGBA:
 625             p_format->i_bits_per_pixel = 32;
 626             break;
 627         case FOURCC_RV24:
 628             p_format->i_bits_per_pixel = 24;
 629             break;
 630         case FOURCC_RV15:
 631         case FOURCC_RV16:
 632             p_format->i_bits_per_pixel = 16;
 633             break;
 634         case FOURCC_RGB2:
 635             p_format->i_bits_per_pixel = 8;
 636             break;
 637
 638         case FOURCC_GREY:
 639         case FOURCC_Y800:
 640         case FOURCC_Y8:
 641             p_format->i_bits_per_pixel = 8;
 642             break;
 643
 644         default:
 645             p_format->i_bits_per_pixel = 0;
 646             break;
 647     }
 648 }
 649
 650 /**
 651  * Initialise the picture_t fields given chroma/size.
 652  *
 653  * This function initializes most of the picture_t fields given a chroma and
 654  * size. It makes the assumption that stride == width.
 655  * \param p_this The calling object
 656  * \param p_pic Pointer to the picture to initialize
 657  * \param i_chroma The chroma fourcc to set
 658  * \param i_width The width of the picture
 659  * \param i_height The height of the picture
 660  * \param i_aspect The aspect ratio of the picture
 661  */
 662 int __vout_InitPicture( vlc_object_t *p_this, picture_t *p_pic,
 663                         vlc_fourcc_t i_chroma,
 664                         int i_width, int i_height, int i_aspect )
 665 {
 666     int i_index, i_width_aligned, i_height_aligned;
 667
 668     /* Store default values */
 669     for( i_index = 0; i_index < VOUT_MAX_PLANES; i_index++ )
 670     {
 671         p_pic->p[i_index].p_pixels = NULL;
 672         p_pic->p[i_index].i_pixel_pitch = 1;
 673     }
 674
 675     p_pic->pf_release = 0;
 676     p_pic->pf_lock = 0;
 677     p_pic->pf_unlock = 0;
 678     p_pic->i_refcount = 0;
 679
 680     vout_InitFormat( &p_pic->format, i_chroma, i_width, i_height, i_aspect );
 681
 682     /* Make sure the real dimensions are a multiple of 16 */
 683     i_width_aligned = (i_width + 15) >> 4 << 4;
 684     i_height_aligned = (i_height + 15) >> 4 << 4;
 685
 686     /* Calculate coordinates */
 687     switch( i_chroma )
 688     {
 689         case FOURCC_I411:
 690             p_pic->p[ Y_PLANE ].i_lines = i_height_aligned;
 691             p_pic->p[ Y_PLANE ].i_visible_lines = i_height;
 692             p_pic->p[ Y_PLANE ].i_pitch = i_width_aligned;
 693             p_pic->p[ Y_PLANE ].i_visible_pitch = i_width;
 694             p_pic->p[ U_PLANE ].i_lines = i_height_aligned;
 695             p_pic->p[ U_PLANE ].i_visible_lines = i_height;
 696             p_pic->p[ U_PLANE ].i_pitch = i_width_aligned / 4;
 697             p_pic->p[ U_PLANE ].i_visible_pitch = i_width / 4;
 698             p_pic->p[ V_PLANE ].i_lines = i_height_aligned;
 699             p_pic->p[ V_PLANE ].i_visible_lines = i_height;
 700             p_pic->p[ V_PLANE ].i_pitch = i_width_aligned / 4;
 701             p_pic->p[ V_PLANE ].i_visible_pitch = i_width / 4;
 702             p_pic->i_planes = 3;
 703             break;
 704
 705         case FOURCC_I410:
 706         case FOURCC_YVU9:
 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 / 4;
 712             p_pic->p[ U_PLANE ].i_visible_lines = i_height / 4;
 713             p_pic->p[ U_PLANE ].i_pitch = i_width_aligned / 4;
 714             p_pic->p[ U_PLANE ].i_visible_pitch = i_width / 4;
 715             p_pic->p[ V_PLANE ].i_lines = i_height_aligned / 4;
 716             p_pic->p[ V_PLANE ].i_visible_lines = i_height / 4;
 717             p_pic->p[ V_PLANE ].i_pitch = i_width_aligned / 4;
 718             p_pic->p[ V_PLANE ].i_visible_pitch = i_width / 4;
 719             p_pic->i_planes = 3;
 720             break;
 721
 722         case FOURCC_YV12:
 723         case FOURCC_I420:
 724         case FOURCC_IYUV:
 725         case FOURCC_J420:
 726             p_pic->p[ Y_PLANE ].i_lines = i_height_aligned;
 727             p_pic->p[ Y_PLANE ].i_visible_lines = i_height;
 728             p_pic->p[ Y_PLANE ].i_pitch = i_width_aligned;
 729             p_pic->p[ Y_PLANE ].i_visible_pitch = i_width;
 730             p_pic->p[ U_PLANE ].i_lines = i_height_aligned / 2;
 731             p_pic->p[ U_PLANE ].i_visible_lines = i_height / 2;
 732             p_pic->p[ U_PLANE ].i_pitch = i_width_aligned / 2;
 733             p_pic->p[ U_PLANE ].i_visible_pitch = i_width / 2;
 734             p_pic->p[ V_PLANE ].i_lines = i_height_aligned / 2;
 735             p_pic->p[ V_PLANE ].i_visible_lines = i_height / 2;
 736             p_pic->p[ V_PLANE ].i_pitch = i_width_aligned / 2;
 737             p_pic->p[ V_PLANE ].i_visible_pitch = i_width / 2;
 738             p_pic->i_planes = 3;
 739             break;
 740
 741         case FOURCC_I422:
 742         case FOURCC_J422:
 743             p_pic->p[ Y_PLANE ].i_lines = i_height_aligned;
 744             p_pic->p[ Y_PLANE ].i_visible_lines = i_height;
 745             p_pic->p[ Y_PLANE ].i_pitch = i_width_aligned;
 746             p_pic->p[ Y_PLANE ].i_visible_pitch = i_width;
 747             p_pic->p[ U_PLANE ].i_lines = i_height_aligned;
 748             p_pic->p[ U_PLANE ].i_visible_lines = i_height;
 749             p_pic->p[ U_PLANE ].i_pitch = i_width_aligned / 2;
 750             p_pic->p[ U_PLANE ].i_visible_pitch = i_width / 2;
 751             p_pic->p[ V_PLANE ].i_lines = i_height_aligned;
 752             p_pic->p[ V_PLANE ].i_visible_lines = i_height;
 753             p_pic->p[ V_PLANE ].i_pitch = i_width_aligned / 2;
 754             p_pic->p[ V_PLANE ].i_visible_pitch = i_width / 2;
 755             p_pic->i_planes = 3;
 756             break;
 757
 758         case FOURCC_I444:
 759         case FOURCC_J444:
 760             p_pic->p[ Y_PLANE ].i_lines = i_height_aligned;
 761             p_pic->p[ Y_PLANE ].i_visible_lines = i_height;
 762             p_pic->p[ Y_PLANE ].i_pitch = i_width_aligned;
 763             p_pic->p[ Y_PLANE ].i_visible_pitch = i_width;
 764             p_pic->p[ U_PLANE ].i_lines = i_height_aligned;
 765             p_pic->p[ U_PLANE ].i_visible_lines = i_height;
 766             p_pic->p[ U_PLANE ].i_pitch = i_width_aligned;
 767             p_pic->p[ U_PLANE ].i_visible_pitch = i_width;
 768             p_pic->p[ V_PLANE ].i_lines = i_height_aligned;
 769             p_pic->p[ V_PLANE ].i_visible_lines = i_height;
 770             p_pic->p[ V_PLANE ].i_pitch = i_width_aligned;
 771             p_pic->p[ V_PLANE ].i_visible_pitch = i_width;
 772             p_pic->i_planes = 3;
 773             break;
 774
 775         case FOURCC_YUVA:
 776             p_pic->p[ Y_PLANE ].i_lines = i_height_aligned;
 777             p_pic->p[ Y_PLANE ].i_visible_lines = i_height;
 778             p_pic->p[ Y_PLANE ].i_pitch = i_width_aligned;
 779             p_pic->p[ Y_PLANE ].i_visible_pitch = i_width;
 780             p_pic->p[ U_PLANE ].i_lines = i_height_aligned;
 781             p_pic->p[ U_PLANE ].i_visible_lines = i_height;
 782             p_pic->p[ U_PLANE ].i_pitch = i_width_aligned;
 783             p_pic->p[ U_PLANE ].i_visible_pitch = i_width;
 784             p_pic->p[ V_PLANE ].i_lines = i_height_aligned;
 785             p_pic->p[ V_PLANE ].i_visible_lines = i_height;
 786             p_pic->p[ V_PLANE ].i_pitch = i_width_aligned;
 787             p_pic->p[ V_PLANE ].i_visible_pitch = i_width;
 788             p_pic->p[ A_PLANE ].i_lines = i_height_aligned;
 789             p_pic->p[ A_PLANE ].i_visible_lines = i_height;
 790             p_pic->p[ A_PLANE ].i_pitch = i_width_aligned;
 791             p_pic->p[ A_PLANE ].i_visible_pitch = i_width;
 792             p_pic->i_planes = 4;
 793             break;
 794
 795         case FOURCC_YUVP:
 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;
 799             p_pic->p->i_visible_pitch = i_width;
 800             p_pic->p->i_pixel_pitch = 8;
 801             p_pic->i_planes = 1;
 802             break;
 803
 804         case FOURCC_Y211:
 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;
 808             p_pic->p->i_visible_pitch = i_width;
 809             p_pic->p->i_pixel_pitch = 4;
 810             p_pic->i_planes = 1;
 811             break;
 812
 813         case FOURCC_UYVY:
 814         case FOURCC_YUY2:
 815             p_pic->p->i_lines = i_height_aligned;
 816             p_pic->p->i_visible_lines = i_height;
 817             p_pic->p->i_pitch = i_width_aligned * 2;
 818             p_pic->p->i_visible_pitch = i_width * 2;
 819             p_pic->p->i_pixel_pitch = 4;
 820             p_pic->i_planes = 1;
 821             break;
 822
 823         case FOURCC_RGB2:
 824             p_pic->p->i_lines = i_height_aligned;
 825             p_pic->p->i_visible_lines = i_height;
 826             p_pic->p->i_pitch = i_width_aligned;
 827             p_pic->p->i_visible_pitch = i_width;
 828             p_pic->p->i_pixel_pitch = 1;
 829             p_pic->i_planes = 1;
 830             break;
 831
 832         case FOURCC_RV15:
 833             p_pic->p->i_lines = i_height_aligned;
 834             p_pic->p->i_visible_lines = i_height;
 835             p_pic->p->i_pitch = i_width_aligned * 2;
 836             p_pic->p->i_visible_pitch = i_width * 2;
 837             p_pic->p->i_pixel_pitch = 2;
 838             p_pic->i_planes = 1;
 839             break;
 840
 841         case FOURCC_RV16:
 842             p_pic->p->i_lines = i_height_aligned;
 843             p_pic->p->i_visible_lines = i_height;
 844             p_pic->p->i_pitch = i_width_aligned * 2;
 845             p_pic->p->i_visible_pitch = i_width * 2;
 846             p_pic->p->i_pixel_pitch = 2;
 847             p_pic->i_planes = 1;
 848             break;
 849
 850         case FOURCC_RV24:
 851             p_pic->p->i_lines = i_height_aligned;
 852             p_pic->p->i_visible_lines = i_height;
 853             p_pic->p->i_pitch = i_width_aligned * 3;
 854             p_pic->p->i_visible_pitch = i_width * 3;
 855             p_pic->p->i_pixel_pitch = 3;
 856             p_pic->i_planes = 1;
 857             break;
 858
 859         case FOURCC_RV32:
 860         case FOURCC_RGBA:
 861             p_pic->p->i_lines = i_height_aligned;
 862             p_pic->p->i_visible_lines = i_height;
 863             p_pic->p->i_pitch = i_width_aligned * 4;
 864             p_pic->p->i_visible_pitch = i_width * 4;
 865             p_pic->p->i_pixel_pitch = 4;
 866             p_pic->i_planes = 1;
 867             break;
 868
 869         case FOURCC_GREY:
 870         case FOURCC_Y800:
 871         case FOURCC_Y8:
 872             p_pic->p->i_lines = i_height_aligned;
 873             p_pic->p->i_visible_lines = i_height;
 874             p_pic->p->i_pitch = i_width_aligned;
 875             p_pic->p->i_visible_pitch = i_width;
 876             p_pic->p->i_pixel_pitch = 1;
 877             p_pic->i_planes = 1;
 878             break;
 879
 880         default:
 881             if( p_this )
 882                 msg_Err( p_this, "unknown chroma type 0x%.8x (%4.4s)",
 883                                  i_chroma, (char*)&i_chroma );
 884             p_pic->i_planes = 0;
 885             return VLC_EGENERIC;
 886     }
 887
 888     return VLC_SUCCESS;
 889 }
 890
 891 /**
 892  * Compare two chroma values
 893  *
 894  * This function returns 1 if the two fourcc values given as argument are
 895  * the same format (eg. UYVY/UYNV) or almost the same format (eg. I420/YV12)
 896  */
 897 int vout_ChromaCmp( vlc_fourcc_t i_chroma, vlc_fourcc_t i_amorhc )
 898 {
 899     /* If they are the same, they are the same ! */
 900     if( i_chroma == i_amorhc )
 901     {
 902         return 1;
 903     }
 904
 905     /* Check for equivalence classes */
 906     switch( i_chroma )
 907     {
 908         case FOURCC_I420:
 909         case FOURCC_IYUV:
 910         case FOURCC_YV12:
 911             switch( i_amorhc )
 912             {
 913                 case FOURCC_I420:
 914                 case FOURCC_IYUV:
 915                 case FOURCC_YV12:
 916                     return 1;
 917
 918                 default:
 919                     return 0;
 920             }
 921
 922         case FOURCC_UYVY:
 923         case FOURCC_UYNV:
 924         case FOURCC_Y422:
 925             switch( i_amorhc )
 926             {
 927                 case FOURCC_UYVY:
 928                 case FOURCC_UYNV:
 929                 case FOURCC_Y422:
 930                     return 1;
 931
 932                 default:
 933                     return 0;
 934             }
 935
 936         case FOURCC_YUY2:
 937         case FOURCC_YUNV:
 938             switch( i_amorhc )
 939             {
 940                 case FOURCC_YUY2:
 941                 case FOURCC_YUNV:
 942                     return 1;
 943
 944                 default:
 945                     return 0;
 946             }
 947
 948         case FOURCC_GREY:
 949         case FOURCC_Y800:
 950         case FOURCC_Y8:
 951             switch( i_amorhc )
 952             {
 953                 case FOURCC_GREY:
 954                 case FOURCC_Y800:
 955                 case FOURCC_Y8:
 956                     return 1;
 957
 958                 default:
 959                     return 0;
 960             }
 961
 962         default:
 963             return 0;
 964     }
 965 }
 966
 967 /*****************************************************************************
 968  * vout_CopyPicture: copy a picture to another one
 969  *****************************************************************************
 970  * This function takes advantage of the image format, and reduces the
 971  * number of calls to memcpy() to the minimum. Source and destination
 972  * images must have same width (hence i_visible_pitch), height, and chroma.
 973  *****************************************************************************/
 974 void __vout_CopyPicture( vlc_object_t *p_this,
 975                          picture_t *p_dest, picture_t *p_src )
 976 {
 977     VLC_UNUSED(p_this);
 978     picture_Copy( p_dest, p_src );
 979 }
 980
 981 /*****************************************************************************
 982  *
 983  *****************************************************************************/
 984 static void PictureReleaseCallback( picture_t *p_picture )
 985 {
 986     if( --p_picture->i_refcount > 0 )
 987         return;
 988     picture_Delete( p_picture );
 989 }
 990 /*****************************************************************************
 991  *
 992  *****************************************************************************/
 993 picture_t *picture_New( vlc_fourcc_t i_chroma, int i_width, int i_height, int i_aspect )
 994 {
 995     picture_t *p_picture = malloc( sizeof(*p_picture) );
 996
 997     if( !p_picture )
 998         return NULL;
 999
1000     memset( p_picture, 0, sizeof(*p_picture) );
1001     if( __vout_AllocatePicture( NULL, p_picture,
1002                                 i_chroma, i_width, i_height, i_aspect ) )
1003     {
1004         free( p_picture );
1005         return NULL;
1006     }
1007
1008     p_picture->i_refcount = 1;
1009     p_picture->pf_release = PictureReleaseCallback;
1010     p_picture->i_status = RESERVED_PICTURE;
1011
1012     return p_picture;
1013 }
1014
1015 /*****************************************************************************
1016  *
1017  *****************************************************************************/
1018 void picture_Delete( picture_t *p_picture )
1019 {
1020     assert( p_picture && p_picture->i_refcount == 0 );
1021
1022     free( p_picture->p_data_orig );
1023     free( p_picture->p_sys );
1024     free( p_picture );
1025 }
1026
1027 /*****************************************************************************
1028  *
1029  *****************************************************************************/
1030 void picture_CopyPixels( picture_t *p_dst, const picture_t *p_src )
1031 {
1032     int i;
1033
1034     for( i = 0; i < p_src->i_planes ; i++ )
1035     {
1036         const unsigned i_width  = __MIN( p_dst->p[i].i_visible_pitch,
1037                                          p_src->p[i].i_visible_pitch );
1038         const unsigned i_height = __MIN( p_dst->p[i].i_visible_lines,
1039                                          p_src->p[i].i_visible_lines );
1040
1041         if( p_src->p[i].i_pitch == p_dst->p[i].i_pitch )
1042         {
1043             /* There are margins, but with the same width : perfect ! */
1044             vlc_memcpy( p_dst->p[i].p_pixels, p_src->p[i].p_pixels,
1045                         p_src->p[i].i_pitch * i_height );
1046         }
1047         else
1048         {
1049             /* We need to proceed line by line */
1050             uint8_t *p_in = p_src->p[i].p_pixels;
1051             uint8_t *p_out = p_dst->p[i].p_pixels;
1052             int i_line;
1053
1054             assert( p_in );
1055             assert( p_out );
1056
1057             for( i_line = i_height; i_line--; )
1058             {
1059                 vlc_memcpy( p_out, p_in, i_width );
1060                 p_in += p_src->p[i].i_pitch;
1061                 p_out += p_dst->p[i].i_pitch;
1062             }
1063         }
1064     }
1065 }
1066
1067 /*****************************************************************************
1068  *
1069  *****************************************************************************/
1070
1071