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 VideoLAN
   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., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
  23  *****************************************************************************/
  24
  25 /*****************************************************************************
  26  * Preamble
  27  *****************************************************************************/
  28 #include <stdlib.h>                                                /* free() */
  29 #include <stdio.h>                                              /* sprintf() */
  30 #include <string.h>                                            /* strerror() */
  31
  32 #include <vlc/vlc.h>
  33
  34 #include "vlc_video.h"
  35 #include "video_output.h"
  36 #include "vlc_spu.h"
  37
  38 #include "vout_pictures.h"
  39
  40 /**
  41  * Display a picture
  42  *
  43  * Remove the reservation flag of a picture, which will cause it to be ready
  44  * for display. The picture won't be displayed until vout_DatePicture has been
  45  * called.
  46  */
  47 void vout_DisplayPicture( vout_thread_t *p_vout, picture_t *p_pic )
  48 {
  49     vlc_mutex_lock( &p_vout->picture_lock );
  50     switch( p_pic->i_status )
  51     {
  52     case RESERVED_PICTURE:
  53         p_pic->i_status = RESERVED_DISP_PICTURE;
  54         break;
  55     case RESERVED_DATED_PICTURE:
  56         p_pic->i_status = READY_PICTURE;
  57         break;
  58     default:
  59         msg_Err( p_vout, "picture to display %p has invalid status %d",
  60                          p_pic, p_pic->i_status );
  61         break;
  62     }
  63
  64     vlc_mutex_unlock( &p_vout->picture_lock );
  65 }
  66
  67 /**
  68  * Date a picture
  69  *
  70  * Remove the reservation flag of a picture, which will cause it to be ready
  71  * for display. The picture won't be displayed until vout_DisplayPicture has
  72  * been called.
  73  * \param p_vout The vout in question
  74  * \param p_pic The picture to date
  75  * \param date The date to display the picture
  76  */
  77 void vout_DatePicture( vout_thread_t *p_vout,
  78                        picture_t *p_pic, mtime_t date )
  79 {
  80     vlc_mutex_lock( &p_vout->picture_lock );
  81     p_pic->date = date;
  82     switch( p_pic->i_status )
  83     {
  84     case RESERVED_PICTURE:
  85         p_pic->i_status = RESERVED_DATED_PICTURE;
  86         break;
  87     case RESERVED_DISP_PICTURE:
  88         p_pic->i_status = READY_PICTURE;
  89         break;
  90     default:
  91         msg_Err( p_vout, "picture to date %p has invalid status %d",
  92                          p_pic, p_pic->i_status );
  93         break;
  94     }
  95
  96     vlc_mutex_unlock( &p_vout->picture_lock );
  97 }
  98
  99 /**
 100  * Allocate a picture in the video output heap.
 101  *
 102  * This function creates a reserved image in the video output heap.
 103  * A null pointer is returned if the function fails. This method provides an
 104  * already allocated zone of memory in the picture data fields.
 105  * It needs locking since several pictures can be created by several producers
 106  * threads.
 107  */
 108 picture_t *vout_CreatePicture( vout_thread_t *p_vout,
 109                                vlc_bool_t b_progressive,
 110                                vlc_bool_t b_top_field_first,
 111                                unsigned int i_nb_fields )
 112 {
 113     int         i_pic;                                      /* picture index */
 114     picture_t * p_pic;
 115     picture_t * p_freepic = NULL;                      /* first free picture */
 116
 117     /* Get lock */
 118     vlc_mutex_lock( &p_vout->picture_lock );
 119
 120     /*
 121      * Look for an empty place in the picture heap.
 122      */
 123     for( i_pic = 0; i_pic < I_RENDERPICTURES; i_pic++ )
 124     {
 125         p_pic = PP_RENDERPICTURE[(p_vout->render.i_last_used_pic + i_pic + 1)
 126                                  % I_RENDERPICTURES];
 127
 128         switch( p_pic->i_status )
 129         {
 130             case DESTROYED_PICTURE:
 131                 /* Memory will not be reallocated, and function can end
 132                  * immediately - this is the best possible case, since no
 133                  * memory allocation needs to be done */
 134                 p_pic->i_status   = RESERVED_PICTURE;
 135                 p_pic->i_refcount = 0;
 136                 p_pic->b_force    = 0;
 137
 138                 p_pic->b_progressive        = b_progressive;
 139                 p_pic->i_nb_fields          = i_nb_fields;
 140                 p_pic->b_top_field_first    = b_top_field_first;
 141
 142                 p_vout->i_heap_size++;
 143                 p_vout->render.i_last_used_pic =
 144                     ( p_vout->render.i_last_used_pic + i_pic + 1 )
 145                     % I_RENDERPICTURES;
 146                 vlc_mutex_unlock( &p_vout->picture_lock );
 147                 return( p_pic );
 148
 149             case FREE_PICTURE:
 150                 /* Picture is empty and ready for allocation */
 151                 p_vout->render.i_last_used_pic =
 152                     ( p_vout->render.i_last_used_pic + i_pic + 1 )
 153                     % I_RENDERPICTURES;
 154                 p_freepic = p_pic;
 155                 break;
 156
 157             default:
 158                 break;
 159         }
 160     }
 161
 162     /*
 163      * Prepare picture
 164      */
 165     if( p_freepic != NULL )
 166     {
 167         vout_AllocatePicture( VLC_OBJECT(p_vout),
 168                               p_freepic, p_vout->render.i_chroma,
 169                               p_vout->render.i_width, p_vout->render.i_height,
 170                               p_vout->render.i_aspect );
 171
 172         if( p_freepic->i_planes )
 173         {
 174             /* Copy picture information, set some default values */
 175             p_freepic->i_status   = RESERVED_PICTURE;
 176             p_freepic->i_type     = MEMORY_PICTURE;
 177             p_freepic->b_slow     = 0;
 178
 179             p_freepic->i_refcount = 0;
 180             p_freepic->b_force = 0;
 181
 182             p_freepic->b_progressive        = b_progressive;
 183             p_freepic->i_nb_fields          = i_nb_fields;
 184             p_freepic->b_top_field_first    = b_top_field_first;
 185
 186             p_freepic->i_matrix_coefficients = 1;
 187
 188             p_vout->i_heap_size++;
 189         }
 190         else
 191         {
 192             /* Memory allocation failed : set picture as empty */
 193             p_freepic->i_status = FREE_PICTURE;
 194             p_freepic = NULL;
 195
 196             msg_Err( p_vout, "picture allocation failed" );
 197         }
 198
 199         vlc_mutex_unlock( &p_vout->picture_lock );
 200
 201         return( p_freepic );
 202     }
 203
 204     /* No free or destroyed picture could be found, but the decoder
 205      * will try again in a while. */
 206     vlc_mutex_unlock( &p_vout->picture_lock );
 207
 208     return( NULL );
 209 }
 210
 211 /**
 212  * Remove a permanent or reserved picture from the heap
 213  *
 214  * This function frees a previously reserved picture or a permanent
 215  * picture. It is meant to be used when the construction of a picture aborted.
 216  * Note that the picture will be destroyed even if it is linked !
 217  */
 218 void vout_DestroyPicture( vout_thread_t *p_vout, picture_t *p_pic )
 219 {
 220     vlc_mutex_lock( &p_vout->picture_lock );
 221
 222 #ifdef DEBUG
 223     /* Check if picture status is valid */
 224     if( (p_pic->i_status != RESERVED_PICTURE) &&
 225         (p_pic->i_status != RESERVED_DATED_PICTURE) &&
 226         (p_pic->i_status != RESERVED_DISP_PICTURE) )
 227     {
 228         msg_Err( p_vout, "picture to destroy %p has invalid status %d",
 229                          p_pic, p_pic->i_status );
 230     }
 231 #endif
 232
 233     p_pic->i_status = DESTROYED_PICTURE;
 234     p_vout->i_heap_size--;
 235
 236     vlc_mutex_unlock( &p_vout->picture_lock );
 237 }
 238
 239 /**
 240  * Increment reference counter of a picture
 241  *
 242  * This function increments the reference counter of a picture in the video
 243  * heap. It needs a lock since several producer threads can access the picture.
 244  */
 245 void vout_LinkPicture( vout_thread_t *p_vout, picture_t *p_pic )
 246 {
 247     vlc_mutex_lock( &p_vout->picture_lock );
 248     p_pic->i_refcount++;
 249     vlc_mutex_unlock( &p_vout->picture_lock );
 250 }
 251
 252 /**
 253  * Decrement reference counter of a picture
 254  *
 255  * This function decrement the reference counter of a picture in the video heap
 256  */
 257 void vout_UnlinkPicture( vout_thread_t *p_vout, picture_t *p_pic )
 258 {
 259     vlc_mutex_lock( &p_vout->picture_lock );
 260     p_pic->i_refcount--;
 261
 262     if( p_pic->i_refcount < 0 )
 263     {
 264         msg_Err( p_vout, "picture %p refcount is %i",
 265                  p_pic, p_pic->i_refcount );
 266         p_pic->i_refcount = 0;
 267     }
 268
 269     if( ( p_pic->i_refcount == 0 ) &&
 270         ( p_pic->i_status == DISPLAYED_PICTURE ) )
 271     {
 272         p_pic->i_status = DESTROYED_PICTURE;
 273         p_vout->i_heap_size--;
 274     }
 275
 276     vlc_mutex_unlock( &p_vout->picture_lock );
 277 }
 278
 279 /**
 280  * Render a picture
 281  *
 282  * This function chooses whether the current picture needs to be copied
 283  * before rendering, does the subpicture magic, and tells the video output
 284  * thread which direct buffer needs to be displayed.
 285  */
 286 picture_t * vout_RenderPicture( vout_thread_t *p_vout, picture_t *p_pic,
 287                                                        subpicture_t *p_subpic )
 288 {
 289     video_format_t fmt;
 290     int i_scale_width, i_scale_height;
 291
 292     if( p_pic == NULL )
 293     {
 294         /* XXX: subtitles */
 295
 296         return NULL;
 297     }
 298
 299     fmt.i_aspect = p_vout->output.i_aspect;
 300     fmt.i_chroma = p_vout->output.i_chroma;
 301     fmt.i_width = p_vout->output.i_width;
 302     fmt.i_height = p_vout->output.i_height;
 303     i_scale_width = p_vout->output.i_width * 1000 / p_vout->render.i_width;
 304     i_scale_height = p_vout->output.i_height * 1000 / p_vout->render.i_height;
 305
 306     if( p_pic->i_type == DIRECT_PICTURE )
 307     {
 308         if( !p_vout->render.b_allow_modify_pics || p_pic->i_refcount ||
 309             p_pic->b_force )
 310         {
 311             /* Picture is in a direct buffer and is still in use,
 312              * we need to copy it to another direct buffer before
 313              * displaying it if there are subtitles. */
 314             if( p_subpic != NULL )
 315             {
 316                 /* We have subtitles. First copy the picture to
 317                  * the spare direct buffer, then render the
 318                  * subtitles. */
 319                 vout_CopyPicture( p_vout, PP_OUTPUTPICTURE[0], p_pic );
 320
 321                 spu_RenderSubpictures( p_vout->p_spu, &fmt,
 322                                        PP_OUTPUTPICTURE[0], p_pic, p_subpic,
 323                                        i_scale_width, i_scale_height );
 324
 325                 return PP_OUTPUTPICTURE[0];
 326             }
 327
 328             /* No subtitles, picture is in a directbuffer so
 329              * we can display it directly even if it is still
 330              * in use. */
 331             return p_pic;
 332         }
 333
 334         /* Picture is in a direct buffer but isn't used by the
 335          * decoder. We can safely render subtitles on it and
 336          * display it. */
 337         spu_RenderSubpictures( p_vout->p_spu, &fmt, p_pic, p_pic, p_subpic,
 338                                i_scale_width, i_scale_height );
 339
 340         return p_pic;
 341     }
 342
 343     /* Not a direct buffer. We either need to copy it to a direct buffer,
 344      * or render it if the chroma isn't the same. */
 345     if( p_vout->b_direct )
 346     {
 347         /* Picture is not in a direct buffer, but is exactly the
 348          * same size as the direct buffers. A memcpy() is enough,
 349          * then render the subtitles. */
 350
 351         if( PP_OUTPUTPICTURE[0]->pf_lock )
 352             if( PP_OUTPUTPICTURE[0]->pf_lock( p_vout, PP_OUTPUTPICTURE[0] ) )
 353                 return NULL;
 354
 355         vout_CopyPicture( p_vout, PP_OUTPUTPICTURE[0], p_pic );
 356         spu_RenderSubpictures( p_vout->p_spu, &fmt, PP_OUTPUTPICTURE[0],
 357                                p_pic, p_subpic, i_scale_width, i_scale_height);
 358
 359         if( PP_OUTPUTPICTURE[0]->pf_unlock )
 360             PP_OUTPUTPICTURE[0]->pf_unlock( p_vout, PP_OUTPUTPICTURE[0] );
 361
 362         return PP_OUTPUTPICTURE[0];
 363     }
 364
 365     /* Picture is not in a direct buffer, and needs to be converted to
 366      * another size/chroma. Then the subtitles need to be rendered as
 367      * well. This usually means software YUV, or hardware YUV with a
 368      * different chroma. */
 369
 370     if( p_subpic != NULL && p_vout->p_picture[0].b_slow )
 371     {
 372         /* The picture buffer is in slow memory. We'll use
 373          * the "2 * VOUT_MAX_PICTURES + 1" picture as a temporary
 374          * one for subpictures rendering. */
 375         picture_t *p_tmp_pic = &p_vout->p_picture[2 * VOUT_MAX_PICTURES];
 376         if( p_tmp_pic->i_status == FREE_PICTURE )
 377         {
 378             vout_AllocatePicture( VLC_OBJECT(p_vout),
 379                                   p_tmp_pic, p_vout->output.i_chroma,
 380                                   p_vout->output.i_width,
 381                                   p_vout->output.i_height,
 382                                   p_vout->output.i_aspect );
 383             p_tmp_pic->i_type = MEMORY_PICTURE;
 384             p_tmp_pic->i_status = RESERVED_PICTURE;
 385         }
 386
 387         /* Convert image to the first direct buffer */
 388         p_vout->chroma.pf_convert( p_vout, p_pic, p_tmp_pic );
 389
 390         /* Render subpictures on the first direct buffer */
 391         spu_RenderSubpictures( p_vout->p_spu, &fmt, p_tmp_pic,
 392                                p_tmp_pic, p_subpic,
 393                                i_scale_width, i_scale_height );
 394
 395         if( p_vout->p_picture[0].pf_lock )
 396             if( p_vout->p_picture[0].pf_lock( p_vout, &p_vout->p_picture[0] ) )
 397                 return NULL;
 398
 399         vout_CopyPicture( p_vout, &p_vout->p_picture[0], p_tmp_pic );
 400     }
 401     else
 402     {
 403         if( p_vout->p_picture[0].pf_lock )
 404             if( p_vout->p_picture[0].pf_lock( p_vout, &p_vout->p_picture[0] ) )
 405                 return NULL;
 406
 407         /* Convert image to the first direct buffer */
 408         p_vout->chroma.pf_convert( p_vout, p_pic, &p_vout->p_picture[0] );
 409
 410         /* Render subpictures on the first direct buffer */
 411         spu_RenderSubpictures( p_vout->p_spu, &fmt, &p_vout->p_picture[0],
 412                                &p_vout->p_picture[0], p_subpic,
 413                                i_scale_width, i_scale_height );
 414     }
 415
 416     if( p_vout->p_picture[0].pf_unlock )
 417         p_vout->p_picture[0].pf_unlock( p_vout, &p_vout->p_picture[0] );
 418
 419     return &p_vout->p_picture[0];
 420 }
 421
 422 /**
 423  * Calculate image window coordinates
 424  *
 425  * This function will be accessed by plugins. It calculates the relative
 426  * position of the output window and the image window.
 427  */
 428 void vout_PlacePicture( vout_thread_t *p_vout,
 429                         unsigned int i_width, unsigned int i_height,
 430                         unsigned int *pi_x, unsigned int *pi_y,
 431                         unsigned int *pi_width, unsigned int *pi_height )
 432 {
 433     if( (i_width <= 0) || (i_height <=0) )
 434     {
 435         *pi_width = *pi_height = *pi_x = *pi_y = 0;
 436
 437         return;
 438     }
 439
 440     if( p_vout->b_scale )
 441     {
 442         *pi_width = i_width;
 443         *pi_height = i_height;
 444     }
 445     else
 446     {
 447         *pi_width = __MIN( i_width, p_vout->render.i_width );
 448         *pi_height = __MIN( i_height, p_vout->render.i_height );
 449     }
 450
 451     if( VOUT_ASPECT_FACTOR * *pi_width / *pi_height < p_vout->render.i_aspect )
 452     {
 453         *pi_width = *pi_height * p_vout->render.i_aspect / VOUT_ASPECT_FACTOR;
 454     }
 455     else
 456     {
 457         *pi_height = *pi_width * VOUT_ASPECT_FACTOR / p_vout->render.i_aspect;
 458     }
 459
 460     if( *pi_width > i_width )
 461     {
 462         *pi_width = i_width;
 463         *pi_height = VOUT_ASPECT_FACTOR * *pi_width / p_vout->render.i_aspect;
 464     }
 465
 466     if( *pi_height > i_height )
 467     {
 468         *pi_height = i_height;
 469         *pi_width = *pi_height * p_vout->render.i_aspect / VOUT_ASPECT_FACTOR;
 470     }
 471
 472     switch( p_vout->i_alignment & VOUT_ALIGN_HMASK )
 473     {
 474     case VOUT_ALIGN_LEFT:
 475         *pi_x = 0;
 476         break;
 477     case VOUT_ALIGN_RIGHT:
 478         *pi_x = i_width - *pi_width;
 479         break;
 480     default:
 481         *pi_x = ( i_width - *pi_width ) / 2;
 482     }
 483
 484     switch( p_vout->i_alignment & VOUT_ALIGN_VMASK )
 485     {
 486     case VOUT_ALIGN_TOP:
 487         *pi_y = 0;
 488         break;
 489     case VOUT_ALIGN_BOTTOM:
 490         *pi_y = i_height - *pi_height;
 491         break;
 492     default:
 493         *pi_y = ( i_height - *pi_height ) / 2;
 494     }
 495 }
 496
 497 /**
 498  * Allocate a new picture in the heap.
 499  *
 500  * This function allocates a fake direct buffer in memory, which can be
 501  * used exactly like a video buffer. The video output thread then manages
 502  * how it gets displayed.
 503  */
 504 int __vout_AllocatePicture( vlc_object_t *p_this, picture_t *p_pic,
 505                             vlc_fourcc_t i_chroma,
 506                             int i_width, int i_height, int i_aspect )
 507 {
 508     int i_bytes, i_index, i_width_aligned, i_height_aligned;
 509
 510     /* Make sure the real dimensions are a multiple of 16 */
 511     i_width_aligned = (i_width + 15) >> 4 << 4;
 512     i_height_aligned = (i_height + 15) >> 4 << 4;
 513
 514     if( vout_InitPicture( p_this, p_pic, i_chroma,
 515                           i_width, i_height, i_aspect ) != VLC_SUCCESS )
 516     {
 517         p_pic->i_planes = 0;
 518         return VLC_EGENERIC;
 519     }
 520
 521     /* Calculate how big the new image should be */
 522     i_bytes = p_pic->format.i_bits_per_pixel *
 523         i_width_aligned * i_height_aligned / 8;
 524
 525     p_pic->p_data = vlc_memalign( &p_pic->p_data_orig, 16, i_bytes );
 526
 527     if( p_pic->p_data == NULL )
 528     {
 529         p_pic->i_planes = 0;
 530         return VLC_EGENERIC;
 531     }
 532
 533     /* Fill the p_pixels field for each plane */
 534     p_pic->p[ 0 ].p_pixels = p_pic->p_data;
 535
 536     for( i_index = 1; i_index < p_pic->i_planes; i_index++ )
 537     {
 538         p_pic->p[i_index].p_pixels = p_pic->p[i_index-1].p_pixels +
 539             p_pic->p[i_index-1].i_lines * p_pic->p[i_index-1].i_pitch;
 540     }
 541
 542     return VLC_SUCCESS;
 543 }
 544
 545 /**
 546  * Initialise the video format fields given chroma/size.
 547  *
 548  * This function initializes all the video_frame_format_t fields given the
 549  * static properties of a picture (chroma and size).
 550  * \param p_format Pointer to the format structure to initialize
 551  * \param i_chroma Chroma to set
 552  * \param i_width Width to set
 553  * \param i_height Height to set
 554  * \param i_aspect Aspect ratio
 555  */
 556 void vout_InitFormat( video_frame_format_t *p_format, vlc_fourcc_t i_chroma,
 557                       int i_width, int i_height, int i_aspect )
 558 {
 559     p_format->i_chroma   = i_chroma;
 560     p_format->i_width    = p_format->i_visible_width  = i_width;
 561     p_format->i_height   = p_format->i_visible_height = i_height;
 562     p_format->i_x_offset = p_format->i_y_offset = 0;
 563     p_format->i_aspect   = i_aspect;
 564
 565 #if 0
 566     /* Assume we have square pixels */
 567     if( i_width && i_height )
 568         p_format->i_aspect = i_width * VOUT_ASPECT_FACTOR / i_height;
 569     else
 570         p_format->i_aspect = 0;
 571 #endif
 572
 573     switch( i_chroma )
 574     {
 575         case FOURCC_YUVA:
 576             p_format->i_bits_per_pixel = 32;
 577             break;
 578         case FOURCC_I444:
 579             p_format->i_bits_per_pixel = 24;
 580             break;
 581         case FOURCC_I422:
 582         case FOURCC_YUY2:
 583         case FOURCC_UYVY:
 584             p_format->i_bits_per_pixel = 16;
 585             p_format->i_bits_per_pixel = 16;
 586             break;
 587         case FOURCC_I411:
 588         case FOURCC_YV12:
 589         case FOURCC_I420:
 590         case FOURCC_IYUV:
 591             p_format->i_bits_per_pixel = 12;
 592             break;
 593         case FOURCC_I410:
 594         case FOURCC_YVU9:
 595             p_format->i_bits_per_pixel = 9;
 596             break;
 597         case FOURCC_Y211:
 598             p_format->i_bits_per_pixel = 8;
 599             break;
 600         case FOURCC_YUVP:
 601             p_format->i_bits_per_pixel = 8;
 602             break;
 603
 604         case FOURCC_RV32:
 605             p_format->i_bits_per_pixel = 32;
 606             break;
 607         case FOURCC_RV24:
 608             p_format->i_bits_per_pixel = 24;
 609             break;
 610         case FOURCC_RV15:
 611         case FOURCC_RV16:
 612             p_format->i_bits_per_pixel = 16;
 613             break;
 614         case FOURCC_RGB2:
 615             p_format->i_bits_per_pixel = 8;
 616             break;
 617         default:
 618             p_format->i_bits_per_pixel = 0;
 619             break;
 620     }
 621 }
 622
 623 /**
 624  * Initialise the picture_t fields given chroma/size.
 625  *
 626  * This function initializes most of the picture_t fields given a chroma and
 627  * size. It makes the assumption that stride == width.
 628  * \param p_this The calling object
 629  * \param p_pic Pointer to the picture to initialize
 630  * \param i_chroma The chroma fourcc to set
 631  * \param i_width The width of the picture
 632  * \param i_height The height of the picture
 633  * \param i_aspect The aspect ratio of the picture
 634  */
 635 int __vout_InitPicture( vlc_object_t *p_this, picture_t *p_pic,
 636                         vlc_fourcc_t i_chroma,
 637                         int i_width, int i_height, int i_aspect )
 638 {
 639     int i_index, i_width_aligned, i_height_aligned;
 640
 641     /* Store default values */
 642     for( i_index = 0; i_index < VOUT_MAX_PLANES; i_index++ )
 643     {
 644         p_pic->p[i_index].p_pixels = NULL;
 645         p_pic->p[i_index].i_pixel_pitch = 1;
 646     }
 647
 648     p_pic->pf_release = 0;
 649     p_pic->pf_lock = 0;
 650     p_pic->pf_unlock = 0;
 651     p_pic->i_refcount = 0;
 652
 653     vout_InitFormat( &p_pic->format, i_chroma, i_width, i_height, i_aspect );
 654
 655     /* Make sure the real dimensions are a multiple of 16 */
 656     i_width_aligned = (i_width + 15) >> 4 << 4;
 657     i_height_aligned = (i_height + 15) >> 4 << 4;
 658
 659     /* Calculate coordinates */
 660     switch( i_chroma )
 661     {
 662         case FOURCC_I411:
 663             p_pic->p[ Y_PLANE ].i_lines = i_height_aligned;
 664             p_pic->p[ Y_PLANE ].i_visible_lines = i_height;
 665             p_pic->p[ Y_PLANE ].i_pitch = i_width_aligned;
 666             p_pic->p[ Y_PLANE ].i_visible_pitch = i_width;
 667             p_pic->p[ U_PLANE ].i_lines = i_height_aligned;
 668             p_pic->p[ U_PLANE ].i_visible_lines = i_height;
 669             p_pic->p[ U_PLANE ].i_pitch = i_width_aligned / 4;
 670             p_pic->p[ U_PLANE ].i_visible_pitch = i_width / 4;
 671             p_pic->p[ V_PLANE ].i_lines = i_height_aligned;
 672             p_pic->p[ V_PLANE ].i_visible_lines = i_height;
 673             p_pic->p[ V_PLANE ].i_pitch = i_width_aligned / 4;
 674             p_pic->p[ V_PLANE ].i_visible_pitch = i_width / 4;
 675             p_pic->i_planes = 3;
 676             break;
 677
 678         case FOURCC_I410:
 679         case FOURCC_YVU9:
 680             p_pic->p[ Y_PLANE ].i_lines = i_height_aligned;
 681             p_pic->p[ Y_PLANE ].i_visible_lines = i_height;
 682             p_pic->p[ Y_PLANE ].i_pitch = i_width_aligned;
 683             p_pic->p[ Y_PLANE ].i_visible_pitch = i_width;
 684             p_pic->p[ U_PLANE ].i_lines = i_height_aligned / 4;
 685             p_pic->p[ U_PLANE ].i_visible_lines = i_height / 4;
 686             p_pic->p[ U_PLANE ].i_pitch = i_width_aligned / 4;
 687             p_pic->p[ U_PLANE ].i_visible_pitch = i_width / 4;
 688             p_pic->p[ V_PLANE ].i_lines = i_height_aligned / 4;
 689             p_pic->p[ V_PLANE ].i_visible_lines = i_height / 4;
 690             p_pic->p[ V_PLANE ].i_pitch = i_width_aligned / 4;
 691             p_pic->p[ V_PLANE ].i_visible_pitch = i_width / 4;
 692             p_pic->i_planes = 3;
 693             break;
 694
 695         case FOURCC_YV12:
 696         case FOURCC_I420:
 697         case FOURCC_IYUV:
 698             p_pic->p[ Y_PLANE ].i_lines = i_height_aligned;
 699             p_pic->p[ Y_PLANE ].i_visible_lines = i_height;
 700             p_pic->p[ Y_PLANE ].i_pitch = i_width_aligned;
 701             p_pic->p[ Y_PLANE ].i_visible_pitch = i_width;
 702             p_pic->p[ U_PLANE ].i_lines = i_height_aligned / 2;
 703             p_pic->p[ U_PLANE ].i_visible_lines = i_height / 2;
 704             p_pic->p[ U_PLANE ].i_pitch = i_width_aligned / 2;
 705             p_pic->p[ U_PLANE ].i_visible_pitch = i_width / 2;
 706             p_pic->p[ V_PLANE ].i_lines = i_height_aligned / 2;
 707             p_pic->p[ V_PLANE ].i_visible_lines = i_height / 2;
 708             p_pic->p[ V_PLANE ].i_pitch = i_width_aligned / 2;
 709             p_pic->p[ V_PLANE ].i_visible_pitch = i_width / 2;
 710             p_pic->i_planes = 3;
 711             break;
 712
 713         case FOURCC_I422:
 714             p_pic->p[ Y_PLANE ].i_lines = i_height_aligned;
 715             p_pic->p[ Y_PLANE ].i_visible_lines = i_height;
 716             p_pic->p[ Y_PLANE ].i_pitch = i_width_aligned;
 717             p_pic->p[ Y_PLANE ].i_visible_pitch = i_width;
 718             p_pic->p[ U_PLANE ].i_lines = i_height_aligned;
 719             p_pic->p[ U_PLANE ].i_visible_lines = i_height;
 720             p_pic->p[ U_PLANE ].i_pitch = i_width_aligned / 2;
 721             p_pic->p[ U_PLANE ].i_visible_pitch = i_width / 2;
 722             p_pic->p[ V_PLANE ].i_lines = i_height_aligned;
 723             p_pic->p[ V_PLANE ].i_visible_lines = i_height;
 724             p_pic->p[ V_PLANE ].i_pitch = i_width_aligned / 2;
 725             p_pic->p[ V_PLANE ].i_visible_pitch = i_width / 2;
 726             p_pic->i_planes = 3;
 727             break;
 728
 729         case FOURCC_I444:
 730             p_pic->p[ Y_PLANE ].i_lines = i_height_aligned;
 731             p_pic->p[ Y_PLANE ].i_visible_lines = i_height;
 732             p_pic->p[ Y_PLANE ].i_pitch = i_width_aligned;
 733             p_pic->p[ Y_PLANE ].i_visible_pitch = i_width;
 734             p_pic->p[ U_PLANE ].i_lines = i_height_aligned;
 735             p_pic->p[ U_PLANE ].i_visible_lines = i_height;
 736             p_pic->p[ U_PLANE ].i_pitch = i_width_aligned;
 737             p_pic->p[ U_PLANE ].i_visible_pitch = i_width;
 738             p_pic->p[ V_PLANE ].i_lines = i_height_aligned;
 739             p_pic->p[ V_PLANE ].i_visible_lines = i_height;
 740             p_pic->p[ V_PLANE ].i_pitch = i_width_aligned;
 741             p_pic->p[ V_PLANE ].i_visible_pitch = i_width;
 742             p_pic->i_planes = 3;
 743             break;
 744
 745         case FOURCC_YUVA:
 746             p_pic->p[ Y_PLANE ].i_lines = i_height_aligned;
 747             p_pic->p[ Y_PLANE ].i_visible_lines = i_height;
 748             p_pic->p[ Y_PLANE ].i_pitch = i_width_aligned;
 749             p_pic->p[ Y_PLANE ].i_visible_pitch = i_width;
 750             p_pic->p[ U_PLANE ].i_lines = i_height_aligned;
 751             p_pic->p[ U_PLANE ].i_visible_lines = i_height;
 752             p_pic->p[ U_PLANE ].i_pitch = i_width_aligned;
 753             p_pic->p[ U_PLANE ].i_visible_pitch = i_width;
 754             p_pic->p[ V_PLANE ].i_lines = i_height_aligned;
 755             p_pic->p[ V_PLANE ].i_visible_lines = i_height;
 756             p_pic->p[ V_PLANE ].i_pitch = i_width_aligned;
 757             p_pic->p[ V_PLANE ].i_visible_pitch = i_width;
 758             p_pic->p[ A_PLANE ].i_lines = i_height_aligned;
 759             p_pic->p[ A_PLANE ].i_visible_lines = i_height;
 760             p_pic->p[ A_PLANE ].i_pitch = i_width_aligned;
 761             p_pic->p[ A_PLANE ].i_visible_pitch = i_width;
 762             p_pic->i_planes = 4;
 763             break;
 764
 765         case FOURCC_YUVP:
 766             p_pic->p->i_lines = i_height_aligned;
 767             p_pic->p->i_visible_lines = i_height;
 768             p_pic->p->i_pitch = i_width_aligned;
 769             p_pic->p->i_visible_pitch = i_width;
 770             p_pic->p->i_pixel_pitch = 8;
 771             p_pic->i_planes = 1;
 772             break;
 773
 774         case FOURCC_Y211:
 775             p_pic->p->i_lines = i_height_aligned;
 776             p_pic->p->i_visible_lines = i_height;
 777             p_pic->p->i_pitch = i_width_aligned;
 778             p_pic->p->i_visible_pitch = i_width;
 779             p_pic->p->i_pixel_pitch = 4;
 780             p_pic->i_planes = 1;
 781             break;
 782
 783         case FOURCC_UYVY:
 784         case FOURCC_YUY2:
 785             p_pic->p->i_lines = i_height_aligned;
 786             p_pic->p->i_visible_lines = i_height;
 787             p_pic->p->i_pitch = i_width_aligned * 2;
 788             p_pic->p->i_visible_pitch = i_width * 2;
 789             p_pic->p->i_pixel_pitch = 4;
 790             p_pic->i_planes = 1;
 791             break;
 792
 793         case FOURCC_RGB2:
 794             p_pic->p->i_lines = i_height_aligned;
 795             p_pic->p->i_visible_lines = i_height;
 796             p_pic->p->i_pitch = i_width_aligned;
 797             p_pic->p->i_visible_pitch = i_width;
 798             p_pic->p->i_pixel_pitch = 1;
 799             p_pic->i_planes = 1;
 800             break;
 801
 802         case FOURCC_RV15:
 803             p_pic->p->i_lines = i_height_aligned;
 804             p_pic->p->i_visible_lines = i_height;
 805             p_pic->p->i_pitch = i_width_aligned * 2;
 806             p_pic->p->i_visible_pitch = i_width * 2;
 807             p_pic->p->i_pixel_pitch = 2;
 808             p_pic->i_planes = 1;
 809             break;
 810
 811         case FOURCC_RV16:
 812             p_pic->p->i_lines = i_height_aligned;
 813             p_pic->p->i_visible_lines = i_height;
 814             p_pic->p->i_pitch = i_width_aligned * 2;
 815             p_pic->p->i_visible_pitch = i_width * 2;
 816             p_pic->p->i_pixel_pitch = 2;
 817             p_pic->i_planes = 1;
 818             break;
 819
 820         case FOURCC_RV24:
 821             p_pic->p->i_lines = i_height_aligned;
 822             p_pic->p->i_visible_lines = i_height;
 823             p_pic->p->i_pitch = i_width_aligned * 3;
 824             p_pic->p->i_visible_pitch = i_width * 3;
 825             p_pic->p->i_pixel_pitch = 3;
 826             p_pic->i_planes = 1;
 827             break;
 828
 829         case FOURCC_RV32:
 830             p_pic->p->i_lines = i_height_aligned;
 831             p_pic->p->i_visible_lines = i_height;
 832             p_pic->p->i_pitch = i_width_aligned * 4;
 833             p_pic->p->i_visible_pitch = i_width * 4;
 834             p_pic->p->i_pixel_pitch = 4;
 835             p_pic->i_planes = 1;
 836             break;
 837
 838         default:
 839             msg_Err( p_this, "unknown chroma type 0x%.8x (%4.4s)",
 840                              i_chroma, (char*)&i_chroma );
 841             p_pic->i_planes = 0;
 842             return VLC_EGENERIC;
 843     }
 844
 845     return VLC_SUCCESS;
 846 }
 847
 848 /**
 849  * Compare two chroma values
 850  *
 851  * This function returns 1 if the two fourcc values given as argument are
 852  * the same format (eg. UYVY/UYNV) or almost the same format (eg. I420/YV12)
 853  */
 854 int vout_ChromaCmp( vlc_fourcc_t i_chroma, vlc_fourcc_t i_amorhc )
 855 {
 856     /* If they are the same, they are the same ! */
 857     if( i_chroma == i_amorhc )
 858     {
 859         return 1;
 860     }
 861
 862     /* Check for equivalence classes */
 863     switch( i_chroma )
 864     {
 865         case FOURCC_I420:
 866         case FOURCC_IYUV:
 867         case FOURCC_YV12:
 868             switch( i_amorhc )
 869             {
 870                 case FOURCC_I420:
 871                 case FOURCC_IYUV:
 872                 case FOURCC_YV12:
 873                     return 1;
 874
 875                 default:
 876                     return 0;
 877             }
 878
 879         case FOURCC_UYVY:
 880         case FOURCC_UYNV:
 881         case FOURCC_Y422:
 882             switch( i_amorhc )
 883             {
 884                 case FOURCC_UYVY:
 885                 case FOURCC_UYNV:
 886                 case FOURCC_Y422:
 887                     return 1;
 888
 889                 default:
 890                     return 0;
 891             }
 892
 893         case FOURCC_YUY2:
 894         case FOURCC_YUNV:
 895             switch( i_amorhc )
 896             {
 897                 case FOURCC_YUY2:
 898                 case FOURCC_YUNV:
 899                     return 1;
 900
 901                 default:
 902                     return 0;
 903             }
 904
 905         default:
 906             return 0;
 907     }
 908 }
 909
 910 /*****************************************************************************
 911  * vout_CopyPicture: copy a picture to another one
 912  *****************************************************************************
 913  * This function takes advantage of the image format, and reduces the
 914  * number of calls to memcpy() to the minimum. Source and destination
 915  * images must have same width (hence i_visible_pitch), height, and chroma.
 916  *****************************************************************************/
 917 void __vout_CopyPicture( vlc_object_t *p_this,
 918                          picture_t *p_dest, picture_t *p_src )
 919 {
 920     int i;
 921
 922     for( i = 0; i < p_src->i_planes ; i++ )
 923     {
 924         if( p_src->p[i].i_pitch == p_dest->p[i].i_pitch )
 925         {
 926             /* There are margins, but with the same width : perfect ! */
 927             p_this->p_vlc->pf_memcpy(
 928                          p_dest->p[i].p_pixels, p_src->p[i].p_pixels,
 929                          p_src->p[i].i_pitch * p_src->p[i].i_visible_lines );
 930         }
 931         else
 932         {
 933             /* We need to proceed line by line */
 934             uint8_t *p_in = p_src->p[i].p_pixels;
 935             uint8_t *p_out = p_dest->p[i].p_pixels;
 936             int i_line;
 937
 938             for( i_line = p_src->p[i].i_visible_lines; i_line--; )
 939             {
 940                 p_this->p_vlc->pf_memcpy( p_out, p_in,
 941                                           p_src->p[i].i_visible_pitch );
 942                 p_in += p_src->p[i].i_pitch;
 943                 p_out += p_dest->p[i].i_pitch;
 944             }
 945         }
 946     }
 947
 948     p_dest->date = p_src->date;
 949     p_dest->b_force = p_src->b_force;
 950     p_dest->i_nb_fields = p_src->i_nb_fields;
 951     p_dest->b_progressive = p_src->b_progressive;
 952     p_dest->b_top_field_first = p_src->b_top_field_first;
 953 }