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/vlc.h>
  34 #include <vlc_vout.h>
  35 #include <vlc_osd.h>
  36 #include "vout_pictures.h"
  37
  38 /**
  39  * Display a picture
  40  *
  41  * Remove the reservation flag of a picture, which will cause it to be ready
  42  * for display. The picture won't be displayed until vout_DatePicture has been
  43  * called.
  44  */
  45 void vout_DisplayPicture( vout_thread_t *p_vout, picture_t *p_pic )
  46 {
  47     vlc_mutex_lock( &p_vout->picture_lock );
  48     switch( p_pic->i_status )
  49     {
  50     case RESERVED_PICTURE:
  51         p_pic->i_status = RESERVED_DISP_PICTURE;
  52         break;
  53     case RESERVED_DATED_PICTURE:
  54         p_pic->i_status = READY_PICTURE;
  55         break;
  56     default:
  57         msg_Err( p_vout, "picture to display %p has invalid status %d",
  58                          p_pic, p_pic->i_status );
  59         break;
  60     }
  61
  62     vlc_mutex_unlock( &p_vout->picture_lock );
  63 }
  64
  65 /**
  66  * Date a picture
  67  *
  68  * Remove the reservation flag of a picture, which will cause it to be ready
  69  * for display. The picture won't be displayed until vout_DisplayPicture has
  70  * been called.
  71  * \param p_vout The vout in question
  72  * \param p_pic The picture to date
  73  * \param date The date to display the picture
  74  */
  75 void vout_DatePicture( vout_thread_t *p_vout,
  76                        picture_t *p_pic, mtime_t date )
  77 {
  78     vlc_mutex_lock( &p_vout->picture_lock );
  79     p_pic->date = date;
  80     switch( p_pic->i_status )
  81     {
  82     case RESERVED_PICTURE:
  83         p_pic->i_status = RESERVED_DATED_PICTURE;
  84         break;
  85     case RESERVED_DISP_PICTURE:
  86         p_pic->i_status = READY_PICTURE;
  87         break;
  88     default:
  89         msg_Err( p_vout, "picture to date %p has invalid status %d",
  90                          p_pic, p_pic->i_status );
  91         break;
  92     }
  93
  94     vlc_mutex_unlock( &p_vout->picture_lock );
  95 }
  96
  97 /**
  98  * Allocate a picture in the video output heap.
  99  *
 100  * This function creates a reserved image in the video output heap.
 101  * A null pointer is returned if the function fails. This method provides an
 102  * already allocated zone of memory in the picture data fields.
 103  * It needs locking since several pictures can be created by several producers
 104  * threads.
 105  */
 106 picture_t *vout_CreatePicture( vout_thread_t *p_vout,
 107                                vlc_bool_t b_progressive,
 108                                vlc_bool_t b_top_field_first,
 109                                unsigned int i_nb_fields )
 110 {
 111     int         i_pic;                                      /* picture index */
 112     picture_t * p_pic;
 113     picture_t * p_freepic = NULL;                      /* first free picture */
 114
 115     /* Get lock */
 116     vlc_mutex_lock( &p_vout->picture_lock );
 117
 118     /*
 119      * Look for an empty place in the picture heap.
 120      */
 121     for( i_pic = 0; i_pic < I_RENDERPICTURES; i_pic++ )
 122     {
 123         p_pic = PP_RENDERPICTURE[(p_vout->render.i_last_used_pic + i_pic + 1)
 124                                  % I_RENDERPICTURES];
 125
 126         switch( p_pic->i_status )
 127         {
 128             case DESTROYED_PICTURE:
 129                 /* Memory will not be reallocated, and function can end
 130                  * immediately - this is the best possible case, since no
 131                  * memory allocation needs to be done */
 132                 p_pic->i_status   = RESERVED_PICTURE;
 133                 p_pic->i_refcount = 0;
 134                 p_pic->b_force    = 0;
 135
 136                 p_pic->b_progressive        = b_progressive;
 137                 p_pic->i_nb_fields          = i_nb_fields;
 138                 p_pic->b_top_field_first    = b_top_field_first;
 139
 140                 p_vout->i_heap_size++;
 141                 p_vout->render.i_last_used_pic =
 142                     ( p_vout->render.i_last_used_pic + i_pic + 1 )
 143                     % I_RENDERPICTURES;
 144                 vlc_mutex_unlock( &p_vout->picture_lock );
 145                 return( p_pic );
 146
 147             case FREE_PICTURE:
 148                 /* Picture is empty and ready for allocation */
 149                 p_vout->render.i_last_used_pic =
 150                     ( p_vout->render.i_last_used_pic + i_pic + 1 )
 151                     % I_RENDERPICTURES;
 152                 p_freepic = p_pic;
 153                 break;
 154
 155             default:
 156                 break;
 157         }
 158     }
 159
 160     /*
 161      * Prepare picture
 162      */
 163     if( p_freepic != NULL )
 164     {
 165         vout_AllocatePicture( VLC_OBJECT(p_vout),
 166                               p_freepic, p_vout->render.i_chroma,
 167                               p_vout->render.i_width, p_vout->render.i_height,
 168                               p_vout->render.i_aspect );
 169
 170         if( p_freepic->i_planes )
 171         {
 172             /* Copy picture information, set some default values */
 173             p_freepic->i_status   = RESERVED_PICTURE;
 174             p_freepic->i_type     = MEMORY_PICTURE;
 175             p_freepic->b_slow     = 0;
 176
 177             p_freepic->i_refcount = 0;
 178             p_freepic->b_force = 0;
 179
 180             p_freepic->b_progressive        = b_progressive;
 181             p_freepic->i_nb_fields          = i_nb_fields;
 182             p_freepic->b_top_field_first    = b_top_field_first;
 183
 184             p_freepic->i_matrix_coefficients = 1;
 185
 186             p_vout->i_heap_size++;
 187         }
 188         else
 189         {
 190             /* Memory allocation failed : set picture as empty */
 191             p_freepic->i_status = FREE_PICTURE;
 192             p_freepic = NULL;
 193
 194             msg_Err( p_vout, "picture allocation failed" );
 195         }
 196
 197         vlc_mutex_unlock( &p_vout->picture_lock );
 198
 199         return( p_freepic );
 200     }
 201
 202     /* No free or destroyed picture could be found, but the decoder
 203      * will try again in a while. */
 204     vlc_mutex_unlock( &p_vout->picture_lock );
 205
 206     return( NULL );
 207 }
 208
 209 /**
 210  * Remove a permanent or reserved picture from the heap
 211  *
 212  * This function frees a previously reserved picture or a permanent
 213  * picture. It is meant to be used when the construction of a picture aborted.
 214  * Note that the picture will be destroyed even if it is linked !
 215  */
 216 void vout_DestroyPicture( vout_thread_t *p_vout, picture_t *p_pic )
 217 {
 218     vlc_mutex_lock( &p_vout->picture_lock );
 219
 220 #ifndef NDEBUG
 221     /* Check if picture status is valid */
 222     if( (p_pic->i_status != RESERVED_PICTURE) &&
 223         (p_pic->i_status != RESERVED_DATED_PICTURE) &&
 224         (p_pic->i_status != RESERVED_DISP_PICTURE) )
 225     {
 226         msg_Err( p_vout, "picture to destroy %p has invalid status %d",
 227                          p_pic, p_pic->i_status );
 228     }
 229 #endif
 230
 231     p_pic->i_status = DESTROYED_PICTURE;
 232     p_vout->i_heap_size--;
 233
 234     vlc_mutex_unlock( &p_vout->picture_lock );
 235 }
 236
 237 /**
 238  * Increment reference counter of a picture
 239  *
 240  * This function increments the reference counter of a picture in the video
 241  * heap. It needs a lock since several producer threads can access the picture.
 242  */
 243 void vout_LinkPicture( vout_thread_t *p_vout, picture_t *p_pic )
 244 {
 245     vlc_mutex_lock( &p_vout->picture_lock );
 246     p_pic->i_refcount++;
 247     vlc_mutex_unlock( &p_vout->picture_lock );
 248 }
 249
 250 /**
 251  * Decrement reference counter of a picture
 252  *
 253  * This function decrement the reference counter of a picture in the video heap
 254  */
 255 void vout_UnlinkPicture( vout_thread_t *p_vout, picture_t *p_pic )
 256 {
 257     vlc_mutex_lock( &p_vout->picture_lock );
 258     p_pic->i_refcount--;
 259
 260     if( ( p_pic->i_refcount == 0 ) &&
 261         ( p_pic->i_status == DISPLAYED_PICTURE ) )
 262     {
 263         p_pic->i_status = DESTROYED_PICTURE;
 264         p_vout->i_heap_size--;
 265     }
 266
 267     vlc_mutex_unlock( &p_vout->picture_lock );
 268 }
 269
 270 /**
 271  * Render a picture
 272  *
 273  * This function chooses whether the current picture needs to be copied
 274  * before rendering, does the subpicture magic, and tells the video output
 275  * thread which direct buffer needs to be displayed.
 276  */
 277 picture_t * vout_RenderPicture( vout_thread_t *p_vout, picture_t *p_pic,
 278                                                        subpicture_t *p_subpic )
 279 {
 280     int i_scale_width, i_scale_height;
 281
 282     if( p_pic == NULL )
 283     {
 284         /* XXX: subtitles */
 285         return NULL;
 286     }
 287
 288     i_scale_width = p_vout->fmt_out.i_visible_width * 1000 /
 289         p_vout->fmt_in.i_visible_width;
 290     i_scale_height = p_vout->fmt_out.i_visible_height * 1000 /
 291         p_vout->fmt_in.i_visible_height;
 292
 293     if( p_pic->i_type == DIRECT_PICTURE )
 294     {
 295         if( !p_vout->render.b_allow_modify_pics || p_pic->i_refcount ||
 296             p_pic->b_force )
 297         {
 298             /* Picture is in a direct buffer and is still in use,
 299              * we need to copy it to another direct buffer before
 300              * displaying it if there are subtitles. */
 301             if( p_subpic != NULL )
 302             {
 303                 /* We have subtitles. First copy the picture to
 304                  * the spare direct buffer, then render the
 305                  * subtitles. */
 306                 vout_CopyPicture( p_vout, PP_OUTPUTPICTURE[0], p_pic );
 307
 308                 spu_RenderSubpictures( p_vout->p_spu, &p_vout->fmt_out,
 309                                        PP_OUTPUTPICTURE[0], p_pic, p_subpic,
 310                                        i_scale_width, i_scale_height );
 311
 312                 return PP_OUTPUTPICTURE[0];
 313             }
 314
 315             /* No subtitles, picture is in a directbuffer so
 316              * we can display it directly even if it is still
 317              * in use. */
 318             return p_pic;
 319         }
 320
 321         /* Picture is in a direct buffer but isn't used by the
 322          * decoder. We can safely render subtitles on it and
 323          * display it. */
 324         spu_RenderSubpictures( p_vout->p_spu, &p_vout->fmt_out, p_pic, p_pic,
 325                                p_subpic, i_scale_width, i_scale_height );
 326
 327         return p_pic;
 328     }
 329
 330     /* Not a direct buffer. We either need to copy it to a direct buffer,
 331      * or render it if the chroma isn't the same. */
 332     if( p_vout->b_direct )
 333     {
 334         /* Picture is not in a direct buffer, but is exactly the
 335          * same size as the direct buffers. A memcpy() is enough,
 336          * then render the subtitles. */
 337
 338         if( PP_OUTPUTPICTURE[0]->pf_lock )
 339             if( PP_OUTPUTPICTURE[0]->pf_lock( p_vout, PP_OUTPUTPICTURE[0] ) )
 340                 return NULL;
 341
 342         vout_CopyPicture( p_vout, PP_OUTPUTPICTURE[0], p_pic );
 343         spu_RenderSubpictures( p_vout->p_spu, &p_vout->fmt_out,
 344                                PP_OUTPUTPICTURE[0], p_pic,
 345                                p_subpic, i_scale_width, i_scale_height );
 346
 347         if( PP_OUTPUTPICTURE[0]->pf_unlock )
 348             PP_OUTPUTPICTURE[0]->pf_unlock( p_vout, PP_OUTPUTPICTURE[0] );
 349
 350         return PP_OUTPUTPICTURE[0];
 351     }
 352
 353     /* Picture is not in a direct buffer, and needs to be converted to
 354      * another size/chroma. Then the subtitles need to be rendered as
 355      * well. This usually means software YUV, or hardware YUV with a
 356      * different chroma. */
 357
 358     if( p_subpic != NULL && p_vout->p_picture[0].b_slow )
 359     {
 360         /* The picture buffer is in slow memory. We'll use
 361          * the "2 * VOUT_MAX_PICTURES + 1" picture as a temporary
 362          * one for subpictures rendering. */
 363         picture_t *p_tmp_pic = &p_vout->p_picture[2 * VOUT_MAX_PICTURES];
 364         if( p_tmp_pic->i_status == FREE_PICTURE )
 365         {
 366             vout_AllocatePicture( VLC_OBJECT(p_vout),
 367                                   p_tmp_pic, p_vout->fmt_out.i_chroma,
 368                                   p_vout->fmt_out.i_width,
 369                                   p_vout->fmt_out.i_height,
 370                                   p_vout->fmt_out.i_aspect );
 371             p_tmp_pic->i_type = MEMORY_PICTURE;
 372             p_tmp_pic->i_status = RESERVED_PICTURE;
 373             /* some modules (such as blend)  needs to know the extra information in picture heap */
 374             p_tmp_pic->p_heap = &p_vout->output;
 375         }
 376
 377         /* Convert image to the first direct buffer */
 378         p_vout->chroma.pf_convert( p_vout, p_pic, p_tmp_pic );
 379
 380         /* Render subpictures on the first direct buffer */
 381         spu_RenderSubpictures( p_vout->p_spu, &p_vout->fmt_out, p_tmp_pic,
 382                                p_tmp_pic, p_subpic,
 383                                i_scale_width, i_scale_height );
 384
 385         if( p_vout->p_picture[0].pf_lock )
 386             if( p_vout->p_picture[0].pf_lock( p_vout, &p_vout->p_picture[0] ) )
 387                 return NULL;
 388
 389         vout_CopyPicture( p_vout, &p_vout->p_picture[0], p_tmp_pic );
 390     }
 391     else
 392     {
 393         if( p_vout->p_picture[0].pf_lock )
 394             if( p_vout->p_picture[0].pf_lock( p_vout, &p_vout->p_picture[0] ) )
 395                 return NULL;
 396
 397         /* Convert image to the first direct buffer */
 398         p_vout->chroma.pf_convert( p_vout, p_pic, &p_vout->p_picture[0] );
 399
 400         /* Render subpictures on the first direct buffer */
 401         spu_RenderSubpictures( p_vout->p_spu, &p_vout->fmt_out,
 402                                &p_vout->p_picture[0], &p_vout->p_picture[0],
 403                                p_subpic, i_scale_width, i_scale_height );
 404     }
 405
 406     if( p_vout->p_picture[0].pf_unlock )
 407         p_vout->p_picture[0].pf_unlock( p_vout, &p_vout->p_picture[0] );
 408
 409     return &p_vout->p_picture[0];
 410 }
 411
 412 /**
 413  * Calculate image window coordinates
 414  *
 415  * This function will be accessed by plugins. It calculates the relative
 416  * position of the output window and the image window.
 417  */
 418 void vout_PlacePicture( vout_thread_t *p_vout,
 419                         unsigned int i_width, unsigned int i_height,
 420                         unsigned int *pi_x, unsigned int *pi_y,
 421                         unsigned int *pi_width, unsigned int *pi_height )
 422 {
 423     if( (i_width <= 0) || (i_height <=0) )
 424     {
 425         *pi_width = *pi_height = *pi_x = *pi_y = 0;
 426         return;
 427     }
 428
 429     if( p_vout->b_scale )
 430     {
 431         *pi_width = i_width;
 432         *pi_height = i_height;
 433     }
 434     else
 435     {
 436         *pi_width = __MIN( i_width, p_vout->fmt_in.i_visible_width );
 437         *pi_height = __MIN( i_height, p_vout->fmt_in.i_visible_height );
 438     }
 439
 440     if( p_vout->fmt_in.i_visible_width * (int64_t)p_vout->fmt_in.i_sar_num *
 441         *pi_height / p_vout->fmt_in.i_visible_height /
 442         p_vout->fmt_in.i_sar_den > *pi_width )
 443     {
 444         *pi_height = p_vout->fmt_in.i_visible_height *
 445             (int64_t)p_vout->fmt_in.i_sar_den * *pi_width /
 446             p_vout->fmt_in.i_visible_width / p_vout->fmt_in.i_sar_num;
 447     }
 448     else
 449     {
 450         *pi_width = p_vout->fmt_in.i_visible_width *
 451             (int64_t)p_vout->fmt_in.i_sar_num * *pi_height /
 452             p_vout->fmt_in.i_visible_height / p_vout->fmt_in.i_sar_den;
 453     }
 454
 455     switch( p_vout->i_alignment & VOUT_ALIGN_HMASK )
 456     {
 457     case VOUT_ALIGN_LEFT:
 458         *pi_x = 0;
 459         break;
 460     case VOUT_ALIGN_RIGHT:
 461         *pi_x = i_width - *pi_width;
 462         break;
 463     default:
 464         *pi_x = ( i_width - *pi_width ) / 2;
 465     }
 466
 467     switch( p_vout->i_alignment & VOUT_ALIGN_VMASK )
 468     {
 469     case VOUT_ALIGN_TOP:
 470         *pi_y = 0;
 471         break;
 472     case VOUT_ALIGN_BOTTOM:
 473         *pi_y = i_height - *pi_height;
 474         break;
 475     default:
 476         *pi_y = ( i_height - *pi_height ) / 2;
 477     }
 478 }
 479
 480 /**
 481  * Allocate a new picture in the heap.
 482  *
 483  * This function allocates a fake direct buffer in memory, which can be
 484  * used exactly like a video buffer. The video output thread then manages
 485  * how it gets displayed.
 486  */
 487 int __vout_AllocatePicture( vlc_object_t *p_this, picture_t *p_pic,
 488                             vlc_fourcc_t i_chroma,
 489                             int i_width, int i_height, int i_aspect )
 490 {
 491     int i_bytes, i_index, i_width_aligned, i_height_aligned;
 492
 493     /* Make sure the real dimensions are a multiple of 16 */
 494     i_width_aligned = (i_width + 15) >> 4 << 4;
 495     i_height_aligned = (i_height + 15) >> 4 << 4;
 496
 497     if( vout_InitPicture( p_this, p_pic, i_chroma,
 498                           i_width, i_height, i_aspect ) != VLC_SUCCESS )
 499     {
 500         p_pic->i_planes = 0;
 501         return VLC_EGENERIC;
 502     }
 503
 504     /* Calculate how big the new image should be */
 505     i_bytes = p_pic->format.i_bits_per_pixel *
 506         i_width_aligned * i_height_aligned / 8;
 507
 508     p_pic->p_data = vlc_memalign( &p_pic->p_data_orig, 16, i_bytes );
 509
 510     if( p_pic->p_data == NULL )
 511     {
 512         p_pic->i_planes = 0;
 513         return VLC_EGENERIC;
 514     }
 515
 516     /* Fill the p_pixels field for each plane */
 517     p_pic->p[ 0 ].p_pixels = p_pic->p_data;
 518
 519     for( i_index = 1; i_index < p_pic->i_planes; i_index++ )
 520     {
 521         p_pic->p[i_index].p_pixels = p_pic->p[i_index-1].p_pixels +
 522             p_pic->p[i_index-1].i_lines * p_pic->p[i_index-1].i_pitch;
 523     }
 524
 525     return VLC_SUCCESS;
 526 }
 527
 528 /**
 529  * Initialise the video format fields given chroma/size.
 530  *
 531  * This function initializes all the video_frame_format_t fields given the
 532  * static properties of a picture (chroma and size).
 533  * \param p_format Pointer to the format structure to initialize
 534  * \param i_chroma Chroma to set
 535  * \param i_width Width to set
 536  * \param i_height Height to set
 537  * \param i_aspect Aspect ratio
 538  */
 539 void vout_InitFormat( video_frame_format_t *p_format, vlc_fourcc_t i_chroma,
 540                       int i_width, int i_height, int i_aspect )
 541 {
 542     p_format->i_chroma   = i_chroma;
 543     p_format->i_width    = p_format->i_visible_width  = i_width;
 544     p_format->i_height   = p_format->i_visible_height = i_height;
 545     p_format->i_x_offset = p_format->i_y_offset = 0;
 546     p_format->i_aspect   = i_aspect;
 547
 548 #if 0
 549     /* Assume we have square pixels */
 550     if( i_width && i_height )
 551         p_format->i_aspect = i_width * VOUT_ASPECT_FACTOR / i_height;
 552     else
 553         p_format->i_aspect = 0;
 554 #endif
 555
 556     switch( i_chroma )
 557     {
 558         case FOURCC_YUVA:
 559             p_format->i_bits_per_pixel = 32;
 560             break;
 561         case FOURCC_I444:
 562         case FOURCC_J444:
 563             p_format->i_bits_per_pixel = 24;
 564             break;
 565         case FOURCC_I422:
 566         case FOURCC_YUY2:
 567         case FOURCC_UYVY:
 568         case FOURCC_J422:
 569             p_format->i_bits_per_pixel = 16;
 570             break;
 571         case FOURCC_I411:
 572         case FOURCC_YV12:
 573         case FOURCC_I420:
 574         case FOURCC_J420:
 575         case FOURCC_IYUV:
 576             p_format->i_bits_per_pixel = 12;
 577             break;
 578         case FOURCC_I410:
 579         case FOURCC_YVU9:
 580             p_format->i_bits_per_pixel = 9;
 581             break;
 582         case FOURCC_Y211:
 583             p_format->i_bits_per_pixel = 8;
 584             break;
 585         case FOURCC_YUVP:
 586             p_format->i_bits_per_pixel = 8;
 587             break;
 588
 589         case FOURCC_RV32:
 590         case FOURCC_RGBA:
 591             p_format->i_bits_per_pixel = 32;
 592             break;
 593         case FOURCC_RV24:
 594             p_format->i_bits_per_pixel = 24;
 595             break;
 596         case FOURCC_RV15:
 597         case FOURCC_RV16:
 598             p_format->i_bits_per_pixel = 16;
 599             break;
 600         case FOURCC_RGB2:
 601             p_format->i_bits_per_pixel = 8;
 602             break;
 603
 604         case FOURCC_GREY:
 605             p_format->i_bits_per_pixel = 8;
 606             break;
 607
 608         default:
 609             p_format->i_bits_per_pixel = 0;
 610             break;
 611     }
 612 }
 613
 614 /**
 615  * Initialise the picture_t fields given chroma/size.
 616  *
 617  * This function initializes most of the picture_t fields given a chroma and
 618  * size. It makes the assumption that stride == width.
 619  * \param p_this The calling object
 620  * \param p_pic Pointer to the picture to initialize
 621  * \param i_chroma The chroma fourcc to set
 622  * \param i_width The width of the picture
 623  * \param i_height The height of the picture
 624  * \param i_aspect The aspect ratio of the picture
 625  */
 626 int __vout_InitPicture( vlc_object_t *p_this, picture_t *p_pic,
 627                         vlc_fourcc_t i_chroma,
 628                         int i_width, int i_height, int i_aspect )
 629 {
 630     int i_index, i_width_aligned, i_height_aligned;
 631
 632     /* Store default values */
 633     for( i_index = 0; i_index < VOUT_MAX_PLANES; i_index++ )
 634     {
 635         p_pic->p[i_index].p_pixels = NULL;
 636         p_pic->p[i_index].i_pixel_pitch = 1;
 637     }
 638
 639     p_pic->pf_release = 0;
 640     p_pic->pf_lock = 0;
 641     p_pic->pf_unlock = 0;
 642     p_pic->i_refcount = 0;
 643
 644     vout_InitFormat( &p_pic->format, i_chroma, i_width, i_height, i_aspect );
 645
 646     /* Make sure the real dimensions are a multiple of 16 */
 647     i_width_aligned = (i_width + 15) >> 4 << 4;
 648     i_height_aligned = (i_height + 15) >> 4 << 4;
 649
 650     /* Calculate coordinates */
 651     switch( i_chroma )
 652     {
 653         case FOURCC_I411:
 654             p_pic->p[ Y_PLANE ].i_lines = i_height_aligned;
 655             p_pic->p[ Y_PLANE ].i_visible_lines = i_height;
 656             p_pic->p[ Y_PLANE ].i_pitch = i_width_aligned;
 657             p_pic->p[ Y_PLANE ].i_visible_pitch = i_width;
 658             p_pic->p[ U_PLANE ].i_lines = i_height_aligned;
 659             p_pic->p[ U_PLANE ].i_visible_lines = i_height;
 660             p_pic->p[ U_PLANE ].i_pitch = i_width_aligned / 4;
 661             p_pic->p[ U_PLANE ].i_visible_pitch = i_width / 4;
 662             p_pic->p[ V_PLANE ].i_lines = i_height_aligned;
 663             p_pic->p[ V_PLANE ].i_visible_lines = i_height;
 664             p_pic->p[ V_PLANE ].i_pitch = i_width_aligned / 4;
 665             p_pic->p[ V_PLANE ].i_visible_pitch = i_width / 4;
 666             p_pic->i_planes = 3;
 667             break;
 668
 669         case FOURCC_I410:
 670         case FOURCC_YVU9:
 671             p_pic->p[ Y_PLANE ].i_lines = i_height_aligned;
 672             p_pic->p[ Y_PLANE ].i_visible_lines = i_height;
 673             p_pic->p[ Y_PLANE ].i_pitch = i_width_aligned;
 674             p_pic->p[ Y_PLANE ].i_visible_pitch = i_width;
 675             p_pic->p[ U_PLANE ].i_lines = i_height_aligned / 4;
 676             p_pic->p[ U_PLANE ].i_visible_lines = i_height / 4;
 677             p_pic->p[ U_PLANE ].i_pitch = i_width_aligned / 4;
 678             p_pic->p[ U_PLANE ].i_visible_pitch = i_width / 4;
 679             p_pic->p[ V_PLANE ].i_lines = i_height_aligned / 4;
 680             p_pic->p[ V_PLANE ].i_visible_lines = i_height / 4;
 681             p_pic->p[ V_PLANE ].i_pitch = i_width_aligned / 4;
 682             p_pic->p[ V_PLANE ].i_visible_pitch = i_width / 4;
 683             p_pic->i_planes = 3;
 684             break;
 685
 686         case FOURCC_YV12:
 687         case FOURCC_I420:
 688         case FOURCC_IYUV:
 689         case FOURCC_J420:
 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 / 2;
 695             p_pic->p[ U_PLANE ].i_visible_lines = i_height / 2;
 696             p_pic->p[ U_PLANE ].i_pitch = i_width_aligned / 2;
 697             p_pic->p[ U_PLANE ].i_visible_pitch = i_width / 2;
 698             p_pic->p[ V_PLANE ].i_lines = i_height_aligned / 2;
 699             p_pic->p[ V_PLANE ].i_visible_lines = i_height / 2;
 700             p_pic->p[ V_PLANE ].i_pitch = i_width_aligned / 2;
 701             p_pic->p[ V_PLANE ].i_visible_pitch = i_width / 2;
 702             p_pic->i_planes = 3;
 703             break;
 704
 705         case FOURCC_I422:
 706         case FOURCC_J422:
 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;
 712             p_pic->p[ U_PLANE ].i_visible_lines = i_height;
 713             p_pic->p[ U_PLANE ].i_pitch = i_width_aligned / 2;
 714             p_pic->p[ U_PLANE ].i_visible_pitch = i_width / 2;
 715             p_pic->p[ V_PLANE ].i_lines = i_height_aligned;
 716             p_pic->p[ V_PLANE ].i_visible_lines = i_height;
 717             p_pic->p[ V_PLANE ].i_pitch = i_width_aligned / 2;
 718             p_pic->p[ V_PLANE ].i_visible_pitch = i_width / 2;
 719             p_pic->i_planes = 3;
 720             break;
 721
 722         case FOURCC_I444:
 723         case FOURCC_J444:
 724             p_pic->p[ Y_PLANE ].i_lines = i_height_aligned;
 725             p_pic->p[ Y_PLANE ].i_visible_lines = i_height;
 726             p_pic->p[ Y_PLANE ].i_pitch = i_width_aligned;
 727             p_pic->p[ Y_PLANE ].i_visible_pitch = i_width;
 728             p_pic->p[ U_PLANE ].i_lines = i_height_aligned;
 729             p_pic->p[ U_PLANE ].i_visible_lines = i_height;
 730             p_pic->p[ U_PLANE ].i_pitch = i_width_aligned;
 731             p_pic->p[ U_PLANE ].i_visible_pitch = i_width;
 732             p_pic->p[ V_PLANE ].i_lines = i_height_aligned;
 733             p_pic->p[ V_PLANE ].i_visible_lines = i_height;
 734             p_pic->p[ V_PLANE ].i_pitch = i_width_aligned;
 735             p_pic->p[ V_PLANE ].i_visible_pitch = i_width;
 736             p_pic->i_planes = 3;
 737             break;
 738
 739         case FOURCC_YUVA:
 740             p_pic->p[ Y_PLANE ].i_lines = i_height_aligned;
 741             p_pic->p[ Y_PLANE ].i_visible_lines = i_height;
 742             p_pic->p[ Y_PLANE ].i_pitch = i_width_aligned;
 743             p_pic->p[ Y_PLANE ].i_visible_pitch = i_width;
 744             p_pic->p[ U_PLANE ].i_lines = i_height_aligned;
 745             p_pic->p[ U_PLANE ].i_visible_lines = i_height;
 746             p_pic->p[ U_PLANE ].i_pitch = i_width_aligned;
 747             p_pic->p[ U_PLANE ].i_visible_pitch = i_width;
 748             p_pic->p[ V_PLANE ].i_lines = i_height_aligned;
 749             p_pic->p[ V_PLANE ].i_visible_lines = i_height;
 750             p_pic->p[ V_PLANE ].i_pitch = i_width_aligned;
 751             p_pic->p[ V_PLANE ].i_visible_pitch = i_width;
 752             p_pic->p[ A_PLANE ].i_lines = i_height_aligned;
 753             p_pic->p[ A_PLANE ].i_visible_lines = i_height;
 754             p_pic->p[ A_PLANE ].i_pitch = i_width_aligned;
 755             p_pic->p[ A_PLANE ].i_visible_pitch = i_width;
 756             p_pic->i_planes = 4;
 757             break;
 758
 759         case FOURCC_YUVP:
 760             p_pic->p->i_lines = i_height_aligned;
 761             p_pic->p->i_visible_lines = i_height;
 762             p_pic->p->i_pitch = i_width_aligned;
 763             p_pic->p->i_visible_pitch = i_width;
 764             p_pic->p->i_pixel_pitch = 8;
 765             p_pic->i_planes = 1;
 766             break;
 767
 768         case FOURCC_Y211:
 769             p_pic->p->i_lines = i_height_aligned;
 770             p_pic->p->i_visible_lines = i_height;
 771             p_pic->p->i_pitch = i_width_aligned;
 772             p_pic->p->i_visible_pitch = i_width;
 773             p_pic->p->i_pixel_pitch = 4;
 774             p_pic->i_planes = 1;
 775             break;
 776
 777         case FOURCC_UYVY:
 778         case FOURCC_YUY2:
 779             p_pic->p->i_lines = i_height_aligned;
 780             p_pic->p->i_visible_lines = i_height;
 781             p_pic->p->i_pitch = i_width_aligned * 2;
 782             p_pic->p->i_visible_pitch = i_width * 2;
 783             p_pic->p->i_pixel_pitch = 4;
 784             p_pic->i_planes = 1;
 785             break;
 786
 787         case FOURCC_RGB2:
 788             p_pic->p->i_lines = i_height_aligned;
 789             p_pic->p->i_visible_lines = i_height;
 790             p_pic->p->i_pitch = i_width_aligned;
 791             p_pic->p->i_visible_pitch = i_width;
 792             p_pic->p->i_pixel_pitch = 1;
 793             p_pic->i_planes = 1;
 794             break;
 795
 796         case FOURCC_RV15:
 797             p_pic->p->i_lines = i_height_aligned;
 798             p_pic->p->i_visible_lines = i_height;
 799             p_pic->p->i_pitch = i_width_aligned * 2;
 800             p_pic->p->i_visible_pitch = i_width * 2;
 801             p_pic->p->i_pixel_pitch = 2;
 802             p_pic->i_planes = 1;
 803             break;
 804
 805         case FOURCC_RV16:
 806             p_pic->p->i_lines = i_height_aligned;
 807             p_pic->p->i_visible_lines = i_height;
 808             p_pic->p->i_pitch = i_width_aligned * 2;
 809             p_pic->p->i_visible_pitch = i_width * 2;
 810             p_pic->p->i_pixel_pitch = 2;
 811             p_pic->i_planes = 1;
 812             break;
 813
 814         case FOURCC_RV24:
 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 * 3;
 818             p_pic->p->i_visible_pitch = i_width * 3;
 819             p_pic->p->i_pixel_pitch = 3;
 820             p_pic->i_planes = 1;
 821             break;
 822
 823         case FOURCC_RV32:
 824         case FOURCC_RGBA:
 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 * 4;
 828             p_pic->p->i_visible_pitch = i_width * 4;
 829             p_pic->p->i_pixel_pitch = 4;
 830             p_pic->i_planes = 1;
 831             break;
 832
 833         case FOURCC_GREY:
 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 = 1;
 839             p_pic->i_planes = 1;
 840             break;
 841
 842         default:
 843             msg_Err( p_this, "unknown chroma type 0x%.8x (%4.4s)",
 844                              i_chroma, (char*)&i_chroma );
 845             p_pic->i_planes = 0;
 846             return VLC_EGENERIC;
 847     }
 848
 849     return VLC_SUCCESS;
 850 }
 851
 852 /**
 853  * Compare two chroma values
 854  *
 855  * This function returns 1 if the two fourcc values given as argument are
 856  * the same format (eg. UYVY/UYNV) or almost the same format (eg. I420/YV12)
 857  */
 858 int vout_ChromaCmp( vlc_fourcc_t i_chroma, vlc_fourcc_t i_amorhc )
 859 {
 860     /* If they are the same, they are the same ! */
 861     if( i_chroma == i_amorhc )
 862     {
 863         return 1;
 864     }
 865
 866     /* Check for equivalence classes */
 867     switch( i_chroma )
 868     {
 869         case FOURCC_I420:
 870         case FOURCC_IYUV:
 871         case FOURCC_YV12:
 872             switch( i_amorhc )
 873             {
 874                 case FOURCC_I420:
 875                 case FOURCC_IYUV:
 876                 case FOURCC_YV12:
 877                     return 1;
 878
 879                 default:
 880                     return 0;
 881             }
 882
 883         case FOURCC_UYVY:
 884         case FOURCC_UYNV:
 885         case FOURCC_Y422:
 886             switch( i_amorhc )
 887             {
 888                 case FOURCC_UYVY:
 889                 case FOURCC_UYNV:
 890                 case FOURCC_Y422:
 891                     return 1;
 892
 893                 default:
 894                     return 0;
 895             }
 896
 897         case FOURCC_YUY2:
 898         case FOURCC_YUNV:
 899             switch( i_amorhc )
 900             {
 901                 case FOURCC_YUY2:
 902                 case FOURCC_YUNV:
 903                     return 1;
 904
 905                 default:
 906                     return 0;
 907             }
 908
 909         default:
 910             return 0;
 911     }
 912 }
 913
 914 /*****************************************************************************
 915  * vout_CopyPicture: copy a picture to another one
 916  *****************************************************************************
 917  * This function takes advantage of the image format, and reduces the
 918  * number of calls to memcpy() to the minimum. Source and destination
 919  * images must have same width (hence i_visible_pitch), height, and chroma.
 920  *****************************************************************************/
 921 void __vout_CopyPicture( vlc_object_t *p_this,
 922                          picture_t *p_dest, picture_t *p_src )
 923 {
 924     int i;
 925
 926     for( i = 0; i < p_src->i_planes ; i++ )
 927     {
 928         if( p_src->p[i].i_pitch == p_dest->p[i].i_pitch )
 929         {
 930             /* There are margins, but with the same width : perfect ! */
 931             p_this->p_libvlc->pf_memcpy(
 932                          p_dest->p[i].p_pixels, p_src->p[i].p_pixels,
 933                          p_src->p[i].i_pitch * p_src->p[i].i_visible_lines );
 934         }
 935         else
 936         {
 937             /* We need to proceed line by line */
 938             uint8_t *p_in = p_src->p[i].p_pixels;
 939             assert( p_in );
 940             uint8_t *p_out = p_dest->p[i].p_pixels;
 941             assert( p_out );
 942             int i_line;
 943
 944             for( i_line = p_src->p[i].i_visible_lines; i_line--; )
 945             {
 946                 p_this->p_libvlc->pf_memcpy( p_out, p_in,
 947                                           p_src->p[i].i_visible_pitch );
 948                 p_in += p_src->p[i].i_pitch;
 949                 p_out += p_dest->p[i].i_pitch;
 950             }
 951         }
 952     }
 953
 954     p_dest->date = p_src->date;
 955     p_dest->b_force = p_src->b_force;
 956     p_dest->i_nb_fields = p_src->i_nb_fields;
 957     p_dest->b_progressive = p_src->b_progressive;
 958     p_dest->b_top_field_first = p_src->b_top_field_first;
 959 }