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