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     picture_CleanupQuant( p_pic );
 266
 267     vlc_mutex_unlock( &p_vout->picture_lock );
 268 }
 269
 270 /**
 271  * Increment reference counter of a picture
 272  *
 273  * This function increments the reference counter of a picture in the video
 274  * heap. It needs a lock since several producer threads can access the picture.
 275  */
 276 void vout_LinkPicture( vout_thread_t *p_vout, picture_t *p_pic )
 277 {
 278     vlc_mutex_lock( &p_vout->picture_lock );
 279     p_pic->i_refcount++;
 280     vlc_mutex_unlock( &p_vout->picture_lock );
 281 }
 282
 283 /**
 284  * Decrement reference counter of a picture
 285  *
 286  * This function decrement the reference counter of a picture in the video heap
 287  */
 288 void vout_UnlinkPicture( vout_thread_t *p_vout, picture_t *p_pic )
 289 {
 290     vlc_mutex_lock( &p_vout->picture_lock );
 291     p_pic->i_refcount--;
 292
 293     if( ( p_pic->i_refcount == 0 ) &&
 294         ( p_pic->i_status == DISPLAYED_PICTURE ) )
 295     {
 296         p_pic->i_status = DESTROYED_PICTURE;
 297         p_vout->i_heap_size--;
 298         picture_CleanupQuant( p_pic );
 299     }
 300
 301     vlc_mutex_unlock( &p_vout->picture_lock );
 302 }
 303
 304 static int vout_LockPicture( vout_thread_t *p_vout, picture_t *p_picture )
 305 {
 306     if( p_picture->pf_lock )
 307         return p_picture->pf_lock( p_vout, p_picture );
 308     return VLC_SUCCESS;
 309 }
 310 static void vout_UnlockPicture( vout_thread_t *p_vout, picture_t *p_picture )
 311 {
 312     if( p_picture->pf_unlock )
 313         p_picture->pf_unlock( p_vout, p_picture );
 314 }
 315
 316 /**
 317  * Render a picture
 318  *
 319  * This function chooses whether the current picture needs to be copied
 320  * before rendering, does the subpicture magic, and tells the video output
 321  * thread which direct buffer needs to be displayed.
 322  */
 323 picture_t * vout_RenderPicture( vout_thread_t *p_vout, picture_t *p_pic,
 324                                                        subpicture_t *p_subpic )
 325 {
 326     int i_scale_width, i_scale_height;
 327
 328     if( p_pic == NULL )
 329     {
 330         /* XXX: subtitles */
 331         return NULL;
 332     }
 333
 334     i_scale_width = p_vout->fmt_out.i_visible_width * 1000 /
 335         p_vout->fmt_in.i_visible_width;
 336     i_scale_height = p_vout->fmt_out.i_visible_height * 1000 /
 337         p_vout->fmt_in.i_visible_height;
 338
 339     if( p_pic->i_type == DIRECT_PICTURE )
 340     {
 341         /* Picture is in a direct buffer. */
 342
 343         if( p_subpic != NULL )
 344         {
 345             /* We have subtitles. First copy the picture to
 346              * the spare direct buffer, then render the
 347              * subtitles. */
 348             if( vout_LockPicture( p_vout, PP_OUTPUTPICTURE[0] ) )
 349                 return NULL;
 350
 351             vout_CopyPicture( p_vout, PP_OUTPUTPICTURE[0], p_pic );
 352
 353             spu_RenderSubpictures( p_vout->p_spu, &p_vout->fmt_out,
 354                                    PP_OUTPUTPICTURE[0], p_subpic,
 355                                    i_scale_width, i_scale_height );
 356
 357             vout_UnlockPicture( p_vout, PP_OUTPUTPICTURE[0] );
 358
 359             return PP_OUTPUTPICTURE[0];
 360         }
 361
 362         /* No subtitles, picture is in a directbuffer so
 363          * we can display it directly (even if it is still
 364          * in use or not). */
 365         return p_pic;
 366     }
 367
 368     /* Not a direct buffer. We either need to copy it to a direct buffer,
 369      * or render it if the chroma isn't the same. */
 370     if( p_vout->b_direct )
 371     {
 372         /* Picture is not in a direct buffer, but is exactly the
 373          * same size as the direct buffers. A memcpy() is enough,
 374          * then render the subtitles. */
 375
 376         if( vout_LockPicture( p_vout, PP_OUTPUTPICTURE[0] ) )
 377             return NULL;
 378
 379         vout_CopyPicture( p_vout, PP_OUTPUTPICTURE[0], p_pic );
 380         spu_RenderSubpictures( p_vout->p_spu, &p_vout->fmt_out,
 381                                PP_OUTPUTPICTURE[0],
 382                                p_subpic, i_scale_width, i_scale_height );
 383
 384         vout_UnlockPicture( p_vout, PP_OUTPUTPICTURE[0] );
 385
 386         return PP_OUTPUTPICTURE[0];
 387     }
 388
 389     /* Picture is not in a direct buffer, and needs to be converted to
 390      * another size/chroma. Then the subtitles need to be rendered as
 391      * well. This usually means software YUV, or hardware YUV with a
 392      * different chroma. */
 393
 394     if( p_subpic != NULL && p_vout->p_picture[0].b_slow )
 395     {
 396         /* The picture buffer is in slow memory. We'll use
 397          * the "2 * VOUT_MAX_PICTURES + 1" picture as a temporary
 398          * one for subpictures rendering. */
 399         picture_t *p_tmp_pic = &p_vout->p_picture[2 * VOUT_MAX_PICTURES];
 400         if( p_tmp_pic->i_status == FREE_PICTURE )
 401         {
 402             vout_AllocatePicture( VLC_OBJECT(p_vout),
 403                                   p_tmp_pic, p_vout->fmt_out.i_chroma,
 404                                   p_vout->fmt_out.i_width,
 405                                   p_vout->fmt_out.i_height,
 406                                   p_vout->fmt_out.i_aspect );
 407             p_tmp_pic->i_type = MEMORY_PICTURE;
 408             p_tmp_pic->i_status = RESERVED_PICTURE;
 409             /* some modules (such as blend)  needs to know the extra information in picture heap */
 410             p_tmp_pic->p_heap = &p_vout->output;
 411         }
 412
 413         /* Convert image to the first direct buffer */
 414         p_vout->p_chroma->p_owner = (filter_owner_sys_t *)p_tmp_pic;
 415         p_vout->p_chroma->pf_video_filter( p_vout->p_chroma, p_pic );
 416
 417         /* Render subpictures on the first direct buffer */
 418         spu_RenderSubpictures( p_vout->p_spu, &p_vout->fmt_out,
 419                                p_tmp_pic, p_subpic,
 420                                i_scale_width, i_scale_height );
 421
 422         if( vout_LockPicture( p_vout, &p_vout->p_picture[0] ) )
 423             return NULL;
 424
 425         vout_CopyPicture( p_vout, &p_vout->p_picture[0], p_tmp_pic );
 426     }
 427     else
 428     {
 429         if( vout_LockPicture( p_vout, &p_vout->p_picture[0] ) )
 430             return NULL;
 431
 432         /* Convert image to the first direct buffer */
 433         p_vout->p_chroma->p_owner = (filter_owner_sys_t *)&p_vout->p_picture[0];
 434         p_vout->p_chroma->pf_video_filter( p_vout->p_chroma, p_pic );
 435
 436         /* Render subpictures on the first direct buffer */
 437         spu_RenderSubpictures( p_vout->p_spu, &p_vout->fmt_out,
 438                                &p_vout->p_picture[0],
 439                                p_subpic, i_scale_width, i_scale_height );
 440     }
 441
 442     vout_UnlockPicture( p_vout, &p_vout->p_picture[0] );
 443
 444     return &p_vout->p_picture[0];
 445 }
 446
 447 /**
 448  * Calculate image window coordinates
 449  *
 450  * This function will be accessed by plugins. It calculates the relative
 451  * position of the output window and the image window.
 452  */
 453 void vout_PlacePicture( vout_thread_t *p_vout,
 454                         unsigned int i_width, unsigned int i_height,
 455                         unsigned int *pi_x, unsigned int *pi_y,
 456                         unsigned int *pi_width, unsigned int *pi_height )
 457 {
 458     if( (i_width <= 0) || (i_height <=0) )
 459     {
 460         *pi_width = *pi_height = *pi_x = *pi_y = 0;
 461         return;
 462     }
 463
 464     if( p_vout->b_scale )
 465     {
 466         *pi_width = i_width;
 467         *pi_height = i_height;
 468     }
 469     else
 470     {
 471         *pi_width = __MIN( i_width, p_vout->fmt_in.i_visible_width );
 472         *pi_height = __MIN( i_height, p_vout->fmt_in.i_visible_height );
 473     }
 474
 475      int64_t i_scaled_width = p_vout->fmt_in.i_visible_width * (int64_t)p_vout->fmt_in.i_sar_num *
 476                               *pi_height / p_vout->fmt_in.i_visible_height / p_vout->fmt_in.i_sar_den;
 477      int64_t i_scaled_height = p_vout->fmt_in.i_visible_height * (int64_t)p_vout->fmt_in.i_sar_den *
 478                                *pi_width / p_vout->fmt_in.i_visible_width / p_vout->fmt_in.i_sar_num;
 479
 480     if( i_scaled_width <= 0 || i_scaled_height <= 0 )
 481     {
 482         msg_Warn( p_vout, "ignoring broken aspect ratio" );
 483         i_scaled_width = *pi_width;
 484         i_scaled_height = *pi_height;
 485     }
 486
 487     if( i_scaled_width > *pi_width )
 488         *pi_height = i_scaled_height;
 489     else
 490         *pi_width = i_scaled_width;
 491
 492     switch( p_vout->i_alignment & VOUT_ALIGN_HMASK )
 493     {
 494     case VOUT_ALIGN_LEFT:
 495         *pi_x = 0;
 496         break;
 497     case VOUT_ALIGN_RIGHT:
 498         *pi_x = i_width - *pi_width;
 499         break;
 500     default:
 501         *pi_x = ( i_width - *pi_width ) / 2;
 502     }
 503
 504     switch( p_vout->i_alignment & VOUT_ALIGN_VMASK )
 505     {
 506     case VOUT_ALIGN_TOP:
 507         *pi_y = 0;
 508         break;
 509     case VOUT_ALIGN_BOTTOM:
 510         *pi_y = i_height - *pi_height;
 511         break;
 512     default:
 513         *pi_y = ( i_height - *pi_height ) / 2;
 514     }
 515 }
 516
 517 /**
 518  * Allocate a new picture in the heap.
 519  *
 520  * This function allocates a fake direct buffer in memory, which can be
 521  * used exactly like a video buffer. The video output thread then manages
 522  * how it gets displayed.
 523  */
 524 int __vout_AllocatePicture( vlc_object_t *p_this, picture_t *p_pic,
 525                             vlc_fourcc_t i_chroma,
 526                             int i_width, int i_height, int i_aspect )
 527 {
 528     int i_bytes, i_index, i_width_aligned, i_height_aligned;
 529
 530     /* Make sure the real dimensions are a multiple of 16 */
 531     i_width_aligned = (i_width + 15) >> 4 << 4;
 532     i_height_aligned = (i_height + 15) >> 4 << 4;
 533
 534     if( vout_InitPicture( p_this, p_pic, i_chroma,
 535                           i_width, i_height, i_aspect ) != VLC_SUCCESS )
 536     {
 537         p_pic->i_planes = 0;
 538         return VLC_EGENERIC;
 539     }
 540
 541     /* Calculate how big the new image should be */
 542     i_bytes = p_pic->format.i_bits_per_pixel *
 543         i_width_aligned * i_height_aligned / 8;
 544
 545     p_pic->p_data = vlc_memalign( &p_pic->p_data_orig, 16, i_bytes );
 546
 547     if( p_pic->p_data == NULL )
 548     {
 549         p_pic->i_planes = 0;
 550         return VLC_EGENERIC;
 551     }
 552
 553     /* Fill the p_pixels field for each plane */
 554     p_pic->p[ 0 ].p_pixels = p_pic->p_data;
 555
 556     for( i_index = 1; i_index < p_pic->i_planes; i_index++ )
 557     {
 558         p_pic->p[i_index].p_pixels = p_pic->p[i_index-1].p_pixels +
 559             p_pic->p[i_index-1].i_lines * p_pic->p[i_index-1].i_pitch;
 560     }
 561
 562     return VLC_SUCCESS;
 563 }
 564
 565 /**
 566  * Initialise the video format fields given chroma/size.
 567  *
 568  * This function initializes all the video_frame_format_t fields given the
 569  * static properties of a picture (chroma and size).
 570  * \param p_format Pointer to the format structure to initialize
 571  * \param i_chroma Chroma to set
 572  * \param i_width Width to set
 573  * \param i_height Height to set
 574  * \param i_aspect Aspect ratio
 575  */
 576 void vout_InitFormat( video_frame_format_t *p_format, vlc_fourcc_t i_chroma,
 577                       int i_width, int i_height, int i_aspect )
 578 {
 579     p_format->i_chroma   = i_chroma;
 580     p_format->i_width    = p_format->i_visible_width  = i_width;
 581     p_format->i_height   = p_format->i_visible_height = i_height;
 582     p_format->i_x_offset = p_format->i_y_offset = 0;
 583     p_format->i_aspect   = i_aspect;
 584
 585 #if 0
 586     /* Assume we have square pixels */
 587     if( i_width && i_height )
 588         p_format->i_aspect = i_width * VOUT_ASPECT_FACTOR / i_height;
 589     else
 590         p_format->i_aspect = 0;
 591 #endif
 592
 593     switch( i_chroma )
 594     {
 595         case FOURCC_YUVA:
 596             p_format->i_bits_per_pixel = 32;
 597             break;
 598         case FOURCC_I444:
 599         case FOURCC_J444:
 600             p_format->i_bits_per_pixel = 24;
 601             break;
 602         case FOURCC_I422:
 603         case FOURCC_YUY2:
 604         case FOURCC_UYVY:
 605         case FOURCC_J422:
 606             p_format->i_bits_per_pixel = 16;
 607             break;
 608         case FOURCC_I440:
 609         case FOURCC_J440:
 610             p_format->i_bits_per_pixel = 16;
 611             break;
 612         case FOURCC_I411:
 613         case FOURCC_YV12:
 614         case FOURCC_I420:
 615         case FOURCC_J420:
 616         case FOURCC_IYUV:
 617             p_format->i_bits_per_pixel = 12;
 618             break;
 619         case FOURCC_I410:
 620         case FOURCC_YVU9:
 621             p_format->i_bits_per_pixel = 9;
 622             break;
 623         case FOURCC_Y211:
 624             p_format->i_bits_per_pixel = 8;
 625             break;
 626         case FOURCC_YUVP:
 627             p_format->i_bits_per_pixel = 8;
 628             break;
 629
 630         case FOURCC_RV32:
 631         case FOURCC_RGBA:
 632             p_format->i_bits_per_pixel = 32;
 633             break;
 634         case FOURCC_RV24:
 635             p_format->i_bits_per_pixel = 24;
 636             break;
 637         case FOURCC_RV15:
 638         case FOURCC_RV16:
 639             p_format->i_bits_per_pixel = 16;
 640             break;
 641         case FOURCC_RGB2:
 642             p_format->i_bits_per_pixel = 8;
 643             break;
 644
 645         case FOURCC_GREY:
 646         case FOURCC_Y800:
 647         case FOURCC_Y8:
 648         case FOURCC_RGBP:
 649             p_format->i_bits_per_pixel = 8;
 650             break;
 651
 652         default:
 653             p_format->i_bits_per_pixel = 0;
 654             break;
 655     }
 656 }
 657
 658 /**
 659  * Initialise the picture_t fields given chroma/size.
 660  *
 661  * This function initializes most of the picture_t fields given a chroma and
 662  * size. It makes the assumption that stride == width.
 663  * \param p_this The calling object
 664  * \param p_pic Pointer to the picture to initialize
 665  * \param i_chroma The chroma fourcc to set
 666  * \param i_width The width of the picture
 667  * \param i_height The height of the picture
 668  * \param i_aspect The aspect ratio of the picture
 669  */
 670 int __vout_InitPicture( vlc_object_t *p_this, picture_t *p_pic,
 671                         vlc_fourcc_t i_chroma,
 672                         int i_width, int i_height, int i_aspect )
 673 {
 674     int i_index, i_width_aligned, i_height_aligned;
 675
 676     /* Store default values */
 677     for( i_index = 0; i_index < VOUT_MAX_PLANES; i_index++ )
 678     {
 679         p_pic->p[i_index].p_pixels = NULL;
 680         p_pic->p[i_index].i_pixel_pitch = 1;
 681     }
 682
 683     p_pic->pf_release = NULL;
 684     p_pic->pf_lock = NULL;
 685     p_pic->pf_unlock = NULL;
 686     p_pic->i_refcount = 0;
 687
 688     p_pic->p_q = NULL;
 689     p_pic->i_qstride = 0;
 690     p_pic->i_qtype = 0;
 691
 692     vout_InitFormat( &p_pic->format, i_chroma, i_width, i_height, i_aspect );
 693
 694     /* Make sure the real dimensions are a multiple of 16 */
 695     i_width_aligned = (i_width + 15) >> 4 << 4;
 696     i_height_aligned = (i_height + 15) >> 4 << 4;
 697
 698     /* Calculate coordinates */
 699     switch( i_chroma )
 700     {
 701         case FOURCC_I411:
 702             p_pic->p[ Y_PLANE ].i_lines = i_height_aligned;
 703             p_pic->p[ Y_PLANE ].i_visible_lines = i_height;
 704             p_pic->p[ Y_PLANE ].i_pitch = i_width_aligned;
 705             p_pic->p[ Y_PLANE ].i_visible_pitch = i_width;
 706             p_pic->p[ U_PLANE ].i_lines = i_height_aligned;
 707             p_pic->p[ U_PLANE ].i_visible_lines = i_height;
 708             p_pic->p[ U_PLANE ].i_pitch = i_width_aligned / 4;
 709             p_pic->p[ U_PLANE ].i_visible_pitch = i_width / 4;
 710             p_pic->p[ V_PLANE ].i_lines = i_height_aligned;
 711             p_pic->p[ V_PLANE ].i_visible_lines = i_height;
 712             p_pic->p[ V_PLANE ].i_pitch = i_width_aligned / 4;
 713             p_pic->p[ V_PLANE ].i_visible_pitch = i_width / 4;
 714             p_pic->i_planes = 3;
 715             break;
 716
 717         case FOURCC_I410:
 718         case FOURCC_YVU9:
 719             p_pic->p[ Y_PLANE ].i_lines = i_height_aligned;
 720             p_pic->p[ Y_PLANE ].i_visible_lines = i_height;
 721             p_pic->p[ Y_PLANE ].i_pitch = i_width_aligned;
 722             p_pic->p[ Y_PLANE ].i_visible_pitch = i_width;
 723             p_pic->p[ U_PLANE ].i_lines = i_height_aligned / 4;
 724             p_pic->p[ U_PLANE ].i_visible_lines = i_height / 4;
 725             p_pic->p[ U_PLANE ].i_pitch = i_width_aligned / 4;
 726             p_pic->p[ U_PLANE ].i_visible_pitch = i_width / 4;
 727             p_pic->p[ V_PLANE ].i_lines = i_height_aligned / 4;
 728             p_pic->p[ V_PLANE ].i_visible_lines = i_height / 4;
 729             p_pic->p[ V_PLANE ].i_pitch = i_width_aligned / 4;
 730             p_pic->p[ V_PLANE ].i_visible_pitch = i_width / 4;
 731             p_pic->i_planes = 3;
 732             break;
 733
 734         case FOURCC_YV12:
 735         case FOURCC_I420:
 736         case FOURCC_IYUV:
 737         case FOURCC_J420:
 738             p_pic->p[ Y_PLANE ].i_lines = i_height_aligned;
 739             p_pic->p[ Y_PLANE ].i_visible_lines = i_height;
 740             p_pic->p[ Y_PLANE ].i_pitch = i_width_aligned;
 741             p_pic->p[ Y_PLANE ].i_visible_pitch = i_width;
 742             p_pic->p[ U_PLANE ].i_lines = i_height_aligned / 2;
 743             p_pic->p[ U_PLANE ].i_visible_lines = i_height / 2;
 744             p_pic->p[ U_PLANE ].i_pitch = i_width_aligned / 2;
 745             p_pic->p[ U_PLANE ].i_visible_pitch = i_width / 2;
 746             p_pic->p[ V_PLANE ].i_lines = i_height_aligned / 2;
 747             p_pic->p[ V_PLANE ].i_visible_lines = i_height / 2;
 748             p_pic->p[ V_PLANE ].i_pitch = i_width_aligned / 2;
 749             p_pic->p[ V_PLANE ].i_visible_pitch = i_width / 2;
 750             p_pic->i_planes = 3;
 751             break;
 752
 753         case FOURCC_I422:
 754         case FOURCC_J422:
 755             p_pic->p[ Y_PLANE ].i_lines = i_height_aligned;
 756             p_pic->p[ Y_PLANE ].i_visible_lines = i_height;
 757             p_pic->p[ Y_PLANE ].i_pitch = i_width_aligned;
 758             p_pic->p[ Y_PLANE ].i_visible_pitch = i_width;
 759             p_pic->p[ U_PLANE ].i_lines = i_height_aligned;
 760             p_pic->p[ U_PLANE ].i_visible_lines = i_height;
 761             p_pic->p[ U_PLANE ].i_pitch = i_width_aligned / 2;
 762             p_pic->p[ U_PLANE ].i_visible_pitch = i_width / 2;
 763             p_pic->p[ V_PLANE ].i_lines = i_height_aligned;
 764             p_pic->p[ V_PLANE ].i_visible_lines = i_height;
 765             p_pic->p[ V_PLANE ].i_pitch = i_width_aligned / 2;
 766             p_pic->p[ V_PLANE ].i_visible_pitch = i_width / 2;
 767             p_pic->i_planes = 3;
 768             break;
 769
 770         case FOURCC_I440:
 771         case FOURCC_J440:
 772             p_pic->p[ Y_PLANE ].i_lines = i_height_aligned;
 773             p_pic->p[ Y_PLANE ].i_visible_lines = i_height;
 774             p_pic->p[ Y_PLANE ].i_pitch = i_width_aligned;
 775             p_pic->p[ Y_PLANE ].i_visible_pitch = i_width;
 776             p_pic->p[ U_PLANE ].i_lines = i_height_aligned / 2;
 777             p_pic->p[ U_PLANE ].i_visible_lines = i_height / 2;
 778             p_pic->p[ U_PLANE ].i_pitch = i_width_aligned;
 779             p_pic->p[ U_PLANE ].i_visible_pitch = i_width;
 780             p_pic->p[ V_PLANE ].i_lines = i_height_aligned / 2;
 781             p_pic->p[ V_PLANE ].i_visible_lines = i_height / 2;
 782             p_pic->p[ V_PLANE ].i_pitch = i_width_aligned;
 783             p_pic->p[ V_PLANE ].i_visible_pitch = i_width;
 784             p_pic->i_planes = 3;
 785             break;
 786
 787         case FOURCC_I444:
 788         case FOURCC_J444:
 789             p_pic->p[ Y_PLANE ].i_lines = i_height_aligned;
 790             p_pic->p[ Y_PLANE ].i_visible_lines = i_height;
 791             p_pic->p[ Y_PLANE ].i_pitch = i_width_aligned;
 792             p_pic->p[ Y_PLANE ].i_visible_pitch = i_width;
 793             p_pic->p[ U_PLANE ].i_lines = i_height_aligned;
 794             p_pic->p[ U_PLANE ].i_visible_lines = i_height;
 795             p_pic->p[ U_PLANE ].i_pitch = i_width_aligned;
 796             p_pic->p[ U_PLANE ].i_visible_pitch = i_width;
 797             p_pic->p[ V_PLANE ].i_lines = i_height_aligned;
 798             p_pic->p[ V_PLANE ].i_visible_lines = i_height;
 799             p_pic->p[ V_PLANE ].i_pitch = i_width_aligned;
 800             p_pic->p[ V_PLANE ].i_visible_pitch = i_width;
 801             p_pic->i_planes = 3;
 802             break;
 803
 804         case FOURCC_YUVA:
 805             p_pic->p[ Y_PLANE ].i_lines = i_height_aligned;
 806             p_pic->p[ Y_PLANE ].i_visible_lines = i_height;
 807             p_pic->p[ Y_PLANE ].i_pitch = i_width_aligned;
 808             p_pic->p[ Y_PLANE ].i_visible_pitch = i_width;
 809             p_pic->p[ U_PLANE ].i_lines = i_height_aligned;
 810             p_pic->p[ U_PLANE ].i_visible_lines = i_height;
 811             p_pic->p[ U_PLANE ].i_pitch = i_width_aligned;
 812             p_pic->p[ U_PLANE ].i_visible_pitch = i_width;
 813             p_pic->p[ V_PLANE ].i_lines = i_height_aligned;
 814             p_pic->p[ V_PLANE ].i_visible_lines = i_height;
 815             p_pic->p[ V_PLANE ].i_pitch = i_width_aligned;
 816             p_pic->p[ V_PLANE ].i_visible_pitch = i_width;
 817             p_pic->p[ A_PLANE ].i_lines = i_height_aligned;
 818             p_pic->p[ A_PLANE ].i_visible_lines = i_height;
 819             p_pic->p[ A_PLANE ].i_pitch = i_width_aligned;
 820             p_pic->p[ A_PLANE ].i_visible_pitch = i_width;
 821             p_pic->i_planes = 4;
 822             break;
 823
 824         case FOURCC_YUVP:
 825             p_pic->p->i_lines = i_height_aligned;
 826             p_pic->p->i_visible_lines = i_height;
 827             p_pic->p->i_pitch = i_width_aligned;
 828             p_pic->p->i_visible_pitch = i_width;
 829             p_pic->p->i_pixel_pitch = 8;
 830             p_pic->i_planes = 1;
 831             break;
 832
 833         case FOURCC_Y211:
 834             p_pic->p->i_lines = i_height_aligned;
 835             p_pic->p->i_visible_lines = i_height;
 836             p_pic->p->i_pitch = i_width_aligned;
 837             p_pic->p->i_visible_pitch = i_width;
 838             p_pic->p->i_pixel_pitch = 4;
 839             p_pic->i_planes = 1;
 840             break;
 841
 842         case FOURCC_UYVY:
 843         case FOURCC_YUY2:
 844             p_pic->p->i_lines = i_height_aligned;
 845             p_pic->p->i_visible_lines = i_height;
 846             p_pic->p->i_pitch = i_width_aligned * 2;
 847             p_pic->p->i_visible_pitch = i_width * 2;
 848             p_pic->p->i_pixel_pitch = 4;
 849             p_pic->i_planes = 1;
 850             break;
 851
 852         case FOURCC_RGB2:
 853             p_pic->p->i_lines = i_height_aligned;
 854             p_pic->p->i_visible_lines = i_height;
 855             p_pic->p->i_pitch = i_width_aligned;
 856             p_pic->p->i_visible_pitch = i_width;
 857             p_pic->p->i_pixel_pitch = 1;
 858             p_pic->i_planes = 1;
 859             break;
 860
 861         case FOURCC_RV15:
 862             p_pic->p->i_lines = i_height_aligned;
 863             p_pic->p->i_visible_lines = i_height;
 864             p_pic->p->i_pitch = i_width_aligned * 2;
 865             p_pic->p->i_visible_pitch = i_width * 2;
 866             p_pic->p->i_pixel_pitch = 2;
 867             p_pic->i_planes = 1;
 868             break;
 869
 870         case FOURCC_RV16:
 871             p_pic->p->i_lines = i_height_aligned;
 872             p_pic->p->i_visible_lines = i_height;
 873             p_pic->p->i_pitch = i_width_aligned * 2;
 874             p_pic->p->i_visible_pitch = i_width * 2;
 875             p_pic->p->i_pixel_pitch = 2;
 876             p_pic->i_planes = 1;
 877             break;
 878
 879         case FOURCC_RV24:
 880             p_pic->p->i_lines = i_height_aligned;
 881             p_pic->p->i_visible_lines = i_height;
 882             p_pic->p->i_pitch = i_width_aligned * 3;
 883             p_pic->p->i_visible_pitch = i_width * 3;
 884             p_pic->p->i_pixel_pitch = 3;
 885             p_pic->i_planes = 1;
 886             break;
 887
 888         case FOURCC_RV32:
 889         case FOURCC_RGBA:
 890             p_pic->p->i_lines = i_height_aligned;
 891             p_pic->p->i_visible_lines = i_height;
 892             p_pic->p->i_pitch = i_width_aligned * 4;
 893             p_pic->p->i_visible_pitch = i_width * 4;
 894             p_pic->p->i_pixel_pitch = 4;
 895             p_pic->i_planes = 1;
 896             break;
 897
 898         case FOURCC_GREY:
 899         case FOURCC_Y800:
 900         case FOURCC_Y8:
 901         case FOURCC_RGBP:
 902             p_pic->p->i_lines = i_height_aligned;
 903             p_pic->p->i_visible_lines = i_height;
 904             p_pic->p->i_pitch = i_width_aligned;
 905             p_pic->p->i_visible_pitch = i_width;
 906             p_pic->p->i_pixel_pitch = 1;
 907             p_pic->i_planes = 1;
 908             break;
 909
 910         default:
 911             if( p_this )
 912                 msg_Err( p_this, "unknown chroma type 0x%.8x (%4.4s)",
 913                                  i_chroma, (char*)&i_chroma );
 914             p_pic->i_planes = 0;
 915             return VLC_EGENERIC;
 916     }
 917
 918     return VLC_SUCCESS;
 919 }
 920
 921 /**
 922  * Compare two chroma values
 923  *
 924  * This function returns 1 if the two fourcc values given as argument are
 925  * the same format (eg. UYVY/UYNV) or almost the same format (eg. I420/YV12)
 926  */
 927 int vout_ChromaCmp( vlc_fourcc_t i_chroma, vlc_fourcc_t i_amorhc )
 928 {
 929     /* If they are the same, they are the same ! */
 930     if( i_chroma == i_amorhc )
 931     {
 932         return 1;
 933     }
 934
 935     /* Check for equivalence classes */
 936     switch( i_chroma )
 937     {
 938         case FOURCC_I420:
 939         case FOURCC_IYUV:
 940         case FOURCC_YV12:
 941             switch( i_amorhc )
 942             {
 943                 case FOURCC_I420:
 944                 case FOURCC_IYUV:
 945                 case FOURCC_YV12:
 946                     return 1;
 947
 948                 default:
 949                     return 0;
 950             }
 951
 952         case FOURCC_UYVY:
 953         case FOURCC_UYNV:
 954         case FOURCC_Y422:
 955             switch( i_amorhc )
 956             {
 957                 case FOURCC_UYVY:
 958                 case FOURCC_UYNV:
 959                 case FOURCC_Y422:
 960                     return 1;
 961
 962                 default:
 963                     return 0;
 964             }
 965
 966         case FOURCC_YUY2:
 967         case FOURCC_YUNV:
 968             switch( i_amorhc )
 969             {
 970                 case FOURCC_YUY2:
 971                 case FOURCC_YUNV:
 972                     return 1;
 973
 974                 default:
 975                     return 0;
 976             }
 977
 978         case FOURCC_GREY:
 979         case FOURCC_Y800:
 980         case FOURCC_Y8:
 981             switch( i_amorhc )
 982             {
 983                 case FOURCC_GREY:
 984                 case FOURCC_Y800:
 985                 case FOURCC_Y8:
 986                     return 1;
 987
 988                 default:
 989                     return 0;
 990             }
 991
 992         case FOURCC_RGBP:
 993             switch( i_amorhc )
 994             {
 995                 case FOURCC_RGBP:
 996                     return 1;
 997
 998                 default:
 999                     return 0;
1000             }
1001
1002         default:
1003             return 0;
1004     }
1005 }
1006
1007 /*****************************************************************************
1008  * vout_CopyPicture: copy a picture to another one
1009  *****************************************************************************
1010  * This function takes advantage of the image format, and reduces the
1011  * number of calls to memcpy() to the minimum. Source and destination
1012  * images must have same width (hence i_visible_pitch), height, and chroma.
1013  *****************************************************************************/
1014 void __vout_CopyPicture( vlc_object_t *p_this,
1015                          picture_t *p_dest, picture_t *p_src )
1016 {
1017     VLC_UNUSED(p_this);
1018     picture_Copy( p_dest, p_src );
1019 }
1020
1021 /*****************************************************************************
1022  *
1023  *****************************************************************************/
1024 static void PictureReleaseCallback( picture_t *p_picture )
1025 {
1026     if( --p_picture->i_refcount > 0 )
1027         return;
1028     picture_Delete( p_picture );
1029 }
1030 /*****************************************************************************
1031  *
1032  *****************************************************************************/
1033 picture_t *picture_New( vlc_fourcc_t i_chroma, int i_width, int i_height, int i_aspect )
1034 {
1035     picture_t *p_picture = malloc( sizeof(*p_picture) );
1036
1037     if( !p_picture )
1038         return NULL;
1039
1040     memset( p_picture, 0, sizeof(*p_picture) );
1041     if( __vout_AllocatePicture( NULL, p_picture,
1042                                 i_chroma, i_width, i_height, i_aspect ) )
1043     {
1044         free( p_picture );
1045         return NULL;
1046     }
1047
1048     p_picture->i_refcount = 1;
1049     p_picture->pf_release = PictureReleaseCallback;
1050     p_picture->i_status = RESERVED_PICTURE;
1051
1052     return p_picture;
1053 }
1054
1055 /*****************************************************************************
1056  *
1057  *****************************************************************************/
1058 void picture_Delete( picture_t *p_picture )
1059 {
1060     assert( p_picture && p_picture->i_refcount == 0 );
1061
1062     free( p_picture->p_q );
1063     free( p_picture->p_data_orig );
1064     free( p_picture->p_sys );
1065     free( p_picture );
1066 }
1067
1068 /*****************************************************************************
1069  *
1070  *****************************************************************************/
1071 void picture_CopyPixels( picture_t *p_dst, const picture_t *p_src )
1072 {
1073     int i;
1074
1075     for( i = 0; i < p_src->i_planes ; i++ )
1076         plane_CopyPixels( p_dst->p+i, p_src->p+i );
1077 }
1078
1079 void plane_CopyPixels( plane_t *p_dst, const plane_t *p_src )
1080 {
1081     const unsigned i_width  = __MIN( p_dst->i_visible_pitch,
1082                                      p_src->i_visible_pitch );
1083     const unsigned i_height = __MIN( p_dst->i_visible_lines,
1084                                      p_src->i_visible_lines );
1085
1086     if( p_src->i_pitch == p_dst->i_pitch )
1087     {
1088         /* There are margins, but with the same width : perfect ! */
1089         vlc_memcpy( p_dst->p_pixels, p_src->p_pixels,
1090                     p_src->i_pitch * i_height );
1091     }
1092     else
1093     {
1094         /* We need to proceed line by line */
1095         uint8_t *p_in = p_src->p_pixels;
1096         uint8_t *p_out = p_dst->p_pixels;
1097         int i_line;
1098
1099         assert( p_in );
1100         assert( p_out );
1101
1102         for( i_line = i_height; i_line--; )
1103         {
1104             vlc_memcpy( p_out, p_in, i_width );
1105             p_in += p_src->i_pitch;
1106             p_out += p_dst->i_pitch;
1107         }
1108     }
1109 }
1110
1111 /*****************************************************************************
1112  *
1113  *****************************************************************************/
1114