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 #include <assert.h>
  33
  34 #include <vlc_common.h>
  35 #include <libvlc.h>
  36 #include <vlc_vout.h>
  37 #include <vlc_osd.h>
  38 #include <vlc_filter.h>
  39 #include <vlc_image.h>
  40 #include <vlc_block.h>
  41
  42 #include "vout_pictures.h"
  43 #include "vout_internal.h"
  44
  45 /**
  46  * Display a picture
  47  *
  48  * Remove the reservation flag of a picture, which will cause it to be ready
  49  * for display.
  50  */
  51 void vout_DisplayPicture( vout_thread_t *p_vout, picture_t *p_pic )
  52 {
  53     vlc_mutex_lock( &p_vout->picture_lock );
  54
  55     if( p_pic->i_status == RESERVED_PICTURE )
  56     {
  57         p_pic->i_status = READY_PICTURE;
  58         vlc_cond_signal( &p_vout->p->picture_wait );
  59     }
  60     else
  61     {
  62         msg_Err( p_vout, "picture to display %p has invalid status %d",
  63                          p_pic, p_pic->i_status );
  64     }
  65     p_vout->p->i_picture_qtype = p_pic->i_qtype;
  66
  67     vlc_mutex_unlock( &p_vout->picture_lock );
  68 }
  69
  70 /**
  71  * Allocate a picture in the video output heap.
  72  *
  73  * This function creates a reserved image in the video output heap.
  74  * A null pointer is returned if the function fails. This method provides an
  75  * already allocated zone of memory in the picture data fields.
  76  * It needs locking since several pictures can be created by several producers
  77  * threads.
  78  */
  79 int vout_CountPictureAvailable( vout_thread_t *p_vout )
  80 {
  81     int i_free = 0;
  82     int i_pic;
  83
  84     vlc_mutex_lock( &p_vout->picture_lock );
  85     for( i_pic = 0; i_pic < I_RENDERPICTURES; i_pic++ )
  86     {
  87         picture_t *p_pic = PP_RENDERPICTURE[(p_vout->render.i_last_used_pic + i_pic + 1) % I_RENDERPICTURES];
  88
  89         switch( p_pic->i_status )
  90         {
  91             case DESTROYED_PICTURE:
  92                 i_free++;
  93                 break;
  94
  95             case FREE_PICTURE:
  96                 i_free++;
  97                 break;
  98
  99             default:
 100                 break;
 101         }
 102     }
 103     vlc_mutex_unlock( &p_vout->picture_lock );
 104
 105     return i_free;
 106 }
 107
 108 picture_t *vout_CreatePicture( vout_thread_t *p_vout,
 109                                bool b_progressive,
 110                                bool 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_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 static void DestroyPicture( vout_thread_t *p_vout, picture_t *p_picture )
 211 {
 212     vlc_assert_locked( &p_vout->picture_lock );
 213
 214     p_picture->i_status = DESTROYED_PICTURE;
 215     p_vout->i_heap_size--;
 216     picture_CleanupQuant( p_picture );
 217
 218     vlc_cond_signal( &p_vout->p->picture_wait );
 219 }
 220
 221 /**
 222  * Remove a permanent or reserved picture from the heap
 223  *
 224  * This function frees a previously reserved picture or a permanent
 225  * picture. It is meant to be used when the construction of a picture aborted.
 226  * Note that the picture will be destroyed even if it is linked !
 227  *
 228  * TODO remove it, vout_DropPicture should be used instead
 229  */
 230 void vout_DestroyPicture( vout_thread_t *p_vout, picture_t *p_pic )
 231 {
 232 #ifndef NDEBUG
 233     /* Check if picture status is valid */
 234     vlc_mutex_lock( &p_vout->picture_lock );
 235     if( p_pic->i_status != RESERVED_PICTURE )
 236     {
 237         msg_Err( p_vout, "picture to destroy %p has invalid status %d",
 238                          p_pic, p_pic->i_status );
 239     }
 240     vlc_mutex_unlock( &p_vout->picture_lock );
 241 #endif
 242
 243     vout_DropPicture( p_vout, p_pic );
 244 }
 245
 246 /* */
 247 void vout_UsePictureLocked( vout_thread_t *p_vout, picture_t *p_picture )
 248 {
 249     vlc_assert_locked( &p_vout->picture_lock );
 250     if( p_picture->i_refcount > 0 )
 251     {
 252         /* Pretend we displayed the picture, but don't destroy
 253          * it since the decoder might still need it. */
 254         p_picture->i_status = DISPLAYED_PICTURE;
 255     }
 256     else
 257     {
 258         /* Destroy the picture without displaying it */
 259         DestroyPicture( p_vout, p_picture );
 260     }
 261 }
 262
 263 /* */
 264 void vout_DropPicture( vout_thread_t *p_vout, picture_t *p_pic  )
 265 {
 266     vlc_mutex_lock( &p_vout->picture_lock );
 267
 268     if( p_pic->i_status == READY_PICTURE )
 269     {
 270         /* Grr cannot destroy ready picture by myself so be sure vout won't like it */
 271         p_pic->date = 1;
 272         vlc_cond_signal( &p_vout->p->picture_wait );
 273     }
 274     else
 275     {
 276         vout_UsePictureLocked( p_vout, p_pic );
 277     }
 278
 279     vlc_mutex_unlock( &p_vout->picture_lock );
 280 }
 281
 282 /**
 283  * Increment reference counter of a picture
 284  *
 285  * This function increments the reference counter of a picture in the video
 286  * heap. It needs a lock since several producer threads can access the picture.
 287  */
 288 void vout_LinkPicture( vout_thread_t *p_vout, picture_t *p_pic )
 289 {
 290     vlc_mutex_lock( &p_vout->picture_lock );
 291     p_pic->i_refcount++;
 292     vlc_mutex_unlock( &p_vout->picture_lock );
 293 }
 294
 295 /**
 296  * Decrement reference counter of a picture
 297  *
 298  * This function decrement the reference counter of a picture in the video heap
 299  */
 300 void vout_UnlinkPicture( vout_thread_t *p_vout, picture_t *p_pic )
 301 {
 302     vlc_mutex_lock( &p_vout->picture_lock );
 303
 304     if( p_pic->i_refcount > 0 )
 305         p_pic->i_refcount--;
 306     else
 307         msg_Err( p_vout, "Invalid picture reference count (%p, %d)",
 308                  p_pic, p_pic->i_refcount );
 309
 310     if( p_pic->i_refcount == 0 && p_pic->i_status == DISPLAYED_PICTURE )
 311         DestroyPicture( p_vout, p_pic );
 312
 313     vlc_mutex_unlock( &p_vout->picture_lock );
 314 }
 315
 316 static int vout_LockPicture( vout_thread_t *p_vout, picture_t *p_picture )
 317 {
 318     if( p_picture->pf_lock )
 319         return p_picture->pf_lock( p_vout, p_picture );
 320     return VLC_SUCCESS;
 321 }
 322 static void vout_UnlockPicture( vout_thread_t *p_vout, picture_t *p_picture )
 323 {
 324     if( p_picture->pf_unlock )
 325         p_picture->pf_unlock( p_vout, p_picture );
 326 }
 327
 328 /**
 329  * Render a picture
 330  *
 331  * This function chooses whether the current picture needs to be copied
 332  * before rendering, does the subpicture magic, and tells the video output
 333  * thread which direct buffer needs to be displayed.
 334  */
 335 picture_t *vout_RenderPicture( vout_thread_t *p_vout, picture_t *p_pic,
 336                                subpicture_t *p_subpic, bool b_paused )
 337 {
 338     if( p_pic == NULL )
 339         return NULL;
 340
 341     if( p_pic->i_type == DIRECT_PICTURE )
 342     {
 343         /* Picture is in a direct buffer. */
 344
 345         if( p_subpic != NULL )
 346         {
 347             /* We have subtitles. First copy the picture to
 348              * the spare direct buffer, then render the
 349              * subtitles. */
 350             if( vout_LockPicture( p_vout, PP_OUTPUTPICTURE[0] ) )
 351                 return NULL;
 352
 353             picture_Copy( PP_OUTPUTPICTURE[0], p_pic );
 354
 355             spu_RenderSubpictures( p_vout->p_spu,
 356                                    PP_OUTPUTPICTURE[0], &p_vout->fmt_out,
 357                                    p_subpic, &p_vout->fmt_in, b_paused );
 358
 359             vout_UnlockPicture( p_vout, PP_OUTPUTPICTURE[0] );
 360
 361             return PP_OUTPUTPICTURE[0];
 362         }
 363
 364         /* No subtitles, picture is in a directbuffer so
 365          * we can display it directly (even if it is still
 366          * in use or not). */
 367         return p_pic;
 368     }
 369
 370     /* Not a direct buffer. We either need to copy it to a direct buffer,
 371      * or render it if the chroma isn't the same. */
 372     if( p_vout->p->b_direct )
 373     {
 374         /* Picture is not in a direct buffer, but is exactly the
 375          * same size as the direct buffers. A memcpy() is enough,
 376          * then render the subtitles. */
 377
 378         if( vout_LockPicture( p_vout, PP_OUTPUTPICTURE[0] ) )
 379             return NULL;
 380
 381         picture_Copy( PP_OUTPUTPICTURE[0], p_pic );
 382         spu_RenderSubpictures( p_vout->p_spu,
 383                                PP_OUTPUTPICTURE[0], &p_vout->fmt_out,
 384                                p_subpic, &p_vout->fmt_in, b_paused );
 385
 386         vout_UnlockPicture( p_vout, PP_OUTPUTPICTURE[0] );
 387
 388         return PP_OUTPUTPICTURE[0];
 389     }
 390
 391     /* Picture is not in a direct buffer, and needs to be converted to
 392      * another size/chroma. Then the subtitles need to be rendered as
 393      * well. This usually means software YUV, or hardware YUV with a
 394      * different chroma. */
 395
 396     if( p_subpic != NULL && p_vout->p_picture[0].b_slow )
 397     {
 398         /* The picture buffer is in slow memory. We'll use
 399          * the "2 * VOUT_MAX_PICTURES + 1" picture as a temporary
 400          * one for subpictures rendering. */
 401         picture_t *p_tmp_pic = &p_vout->p_picture[2 * VOUT_MAX_PICTURES];
 402         if( p_tmp_pic->i_status == FREE_PICTURE )
 403         {
 404             vout_AllocatePicture( VLC_OBJECT(p_vout),
 405                                   p_tmp_pic, p_vout->fmt_out.i_chroma,
 406                                   p_vout->fmt_out.i_width,
 407                                   p_vout->fmt_out.i_height,
 408                                   p_vout->fmt_out.i_aspect );
 409             p_tmp_pic->i_type = MEMORY_PICTURE;
 410             p_tmp_pic->i_status = RESERVED_PICTURE;
 411             /* some modules (such as blend)  needs to know the extra information in picture heap */
 412             p_tmp_pic->p_heap = &p_vout->output;
 413         }
 414
 415         /* Convert image to the first direct buffer */
 416         p_vout->p->p_chroma->p_owner = (filter_owner_sys_t *)p_tmp_pic;
 417         p_vout->p->p_chroma->pf_video_filter( p_vout->p->p_chroma, p_pic );
 418
 419         /* Render subpictures on the first direct buffer */
 420         spu_RenderSubpictures( p_vout->p_spu,
 421                                p_tmp_pic, &p_vout->fmt_out,
 422                                p_subpic, &p_vout->fmt_in, b_paused );
 423
 424         if( vout_LockPicture( p_vout, &p_vout->p_picture[0] ) )
 425             return NULL;
 426
 427         picture_Copy( &p_vout->p_picture[0], p_tmp_pic );
 428     }
 429     else
 430     {
 431         if( vout_LockPicture( p_vout, &p_vout->p_picture[0] ) )
 432             return NULL;
 433
 434         /* Convert image to the first direct buffer */
 435         p_vout->p->p_chroma->p_owner = (filter_owner_sys_t *)&p_vout->p_picture[0];
 436         p_vout->p->p_chroma->pf_video_filter( p_vout->p->p_chroma, p_pic );
 437
 438         /* Render subpictures on the first direct buffer */
 439         spu_RenderSubpictures( p_vout->p_spu,
 440                                &p_vout->p_picture[0], &p_vout->fmt_out,
 441                                p_subpic, &p_vout->fmt_in, b_paused );
 442     }
 443
 444     vout_UnlockPicture( p_vout, &p_vout->p_picture[0] );
 445
 446     return &p_vout->p_picture[0];
 447 }
 448
 449 /**
 450  * Calculate image window coordinates
 451  *
 452  * This function will be accessed by plugins. It calculates the relative
 453  * position of the output window and the image window.
 454  */
 455 void vout_PlacePicture( const vout_thread_t *p_vout,
 456                         unsigned int i_width, unsigned int i_height,
 457                         unsigned int *restrict pi_x,
 458                         unsigned int *restrict pi_y,
 459                         unsigned int *restrict pi_width,
 460                         unsigned int *restrict pi_height )
 461 {
 462     if( i_width <= 0 || i_height <= 0 )
 463     {
 464         *pi_width = *pi_height = *pi_x = *pi_y = 0;
 465         return;
 466     }
 467
 468     if( p_vout->b_autoscale )
 469     {
 470         *pi_width = i_width;
 471         *pi_height = i_height;
 472     }
 473     else
 474     {
 475         int i_zoom = p_vout->i_zoom;
 476         /* be realistic, scaling factor confined between .2 and 10. */
 477         if( i_zoom > 10 * ZOOM_FP_FACTOR )      i_zoom = 10 * ZOOM_FP_FACTOR;
 478         else if( i_zoom <  ZOOM_FP_FACTOR / 5 ) i_zoom = ZOOM_FP_FACTOR / 5;
 479
 480         unsigned int i_original_width, i_original_height;
 481
 482         if( p_vout->fmt_in.i_sar_num >= p_vout->fmt_in.i_sar_den )
 483         {
 484             i_original_width = p_vout->fmt_in.i_visible_width *
 485                                p_vout->fmt_in.i_sar_num / p_vout->fmt_in.i_sar_den;
 486             i_original_height =  p_vout->fmt_in.i_visible_height;
 487         }
 488         else
 489         {
 490             i_original_width =  p_vout->fmt_in.i_visible_width;
 491             i_original_height = p_vout->fmt_in.i_visible_height *
 492                                 p_vout->fmt_in.i_sar_den / p_vout->fmt_in.i_sar_num;
 493         }
 494 #ifdef WIN32
 495         /* On windows, inner video window exceeding container leads to black screen */
 496         *pi_width = __MIN( i_width, i_original_width * i_zoom / ZOOM_FP_FACTOR );
 497         *pi_height = __MIN( i_height, i_original_height * i_zoom / ZOOM_FP_FACTOR );
 498 #else
 499         *pi_width = i_original_width * i_zoom / ZOOM_FP_FACTOR ;
 500         *pi_height = i_original_height * i_zoom / ZOOM_FP_FACTOR ;
 501 #endif
 502     }
 503
 504     int64_t i_scaled_width = p_vout->fmt_in.i_visible_width * (int64_t)p_vout->fmt_in.i_sar_num *
 505                               *pi_height / p_vout->fmt_in.i_visible_height / p_vout->fmt_in.i_sar_den;
 506     int64_t i_scaled_height = p_vout->fmt_in.i_visible_height * (int64_t)p_vout->fmt_in.i_sar_den *
 507                                *pi_width / p_vout->fmt_in.i_visible_width / p_vout->fmt_in.i_sar_num;
 508
 509     if( i_scaled_width <= 0 || i_scaled_height <= 0 )
 510     {
 511         msg_Warn( p_vout, "ignoring broken aspect ratio" );
 512         i_scaled_width = *pi_width;
 513         i_scaled_height = *pi_height;
 514     }
 515
 516     if( i_scaled_width > *pi_width )
 517         *pi_height = i_scaled_height;
 518     else
 519         *pi_width = i_scaled_width;
 520
 521     switch( p_vout->i_alignment & VOUT_ALIGN_HMASK )
 522     {
 523     case VOUT_ALIGN_LEFT:
 524         *pi_x = 0;
 525         break;
 526     case VOUT_ALIGN_RIGHT:
 527         *pi_x = i_width - *pi_width;
 528         break;
 529     default:
 530         *pi_x = ( i_width - *pi_width ) / 2;
 531     }
 532
 533     switch( p_vout->i_alignment & VOUT_ALIGN_VMASK )
 534     {
 535     case VOUT_ALIGN_TOP:
 536         *pi_y = 0;
 537         break;
 538     case VOUT_ALIGN_BOTTOM:
 539         *pi_y = i_height - *pi_height;
 540         break;
 541     default:
 542         *pi_y = ( i_height - *pi_height ) / 2;
 543     }
 544 }
 545
 546 /**
 547  * Allocate a new picture in the heap.
 548  *
 549  * This function allocates a fake direct buffer in memory, which can be
 550  * used exactly like a video buffer. The video output thread then manages
 551  * how it gets displayed.
 552  */
 553 int __vout_AllocatePicture( vlc_object_t *p_this, picture_t *p_pic,
 554                             vlc_fourcc_t i_chroma,
 555                             int i_width, int i_height, int i_aspect )
 556 {
 557     int i_bytes, i_index, i_width_aligned, i_height_aligned;
 558
 559     /* Make sure the real dimensions are a multiple of 16 */
 560     i_width_aligned = (i_width + 15) >> 4 << 4;
 561     i_height_aligned = (i_height + 15) >> 4 << 4;
 562
 563     if( vout_InitPicture( p_this, p_pic, i_chroma,
 564                           i_width, i_height, i_aspect ) != VLC_SUCCESS )
 565     {
 566         p_pic->i_planes = 0;
 567         return VLC_EGENERIC;
 568     }
 569
 570     /* Calculate how big the new image should be */
 571     i_bytes = p_pic->format.i_bits_per_pixel *
 572         i_width_aligned * i_height_aligned / 8;
 573
 574     p_pic->p_data = vlc_memalign( &p_pic->p_data_orig, 16, i_bytes );
 575
 576     if( p_pic->p_data == NULL )
 577     {
 578         p_pic->i_planes = 0;
 579         return VLC_EGENERIC;
 580     }
 581
 582     /* Fill the p_pixels field for each plane */
 583     p_pic->p[ 0 ].p_pixels = p_pic->p_data;
 584
 585     for( i_index = 1; i_index < p_pic->i_planes; i_index++ )
 586     {
 587         p_pic->p[i_index].p_pixels = p_pic->p[i_index-1].p_pixels +
 588             p_pic->p[i_index-1].i_lines * p_pic->p[i_index-1].i_pitch;
 589     }
 590
 591     return VLC_SUCCESS;
 592 }
 593
 594 /**
 595  * Initialise the video format fields given chroma/size.
 596  *
 597  * This function initializes all the video_frame_format_t fields given the
 598  * static properties of a picture (chroma and size).
 599  * \param p_format Pointer to the format structure to initialize
 600  * \param i_chroma Chroma to set
 601  * \param i_width Width to set
 602  * \param i_height Height to set
 603  * \param i_aspect Aspect ratio
 604  */
 605 void vout_InitFormat( video_frame_format_t *p_format, vlc_fourcc_t i_chroma,
 606                       int i_width, int i_height, int i_aspect )
 607 {
 608     p_format->i_chroma   = i_chroma;
 609     p_format->i_width    = p_format->i_visible_width  = i_width;
 610     p_format->i_height   = p_format->i_visible_height = i_height;
 611     p_format->i_x_offset = p_format->i_y_offset = 0;
 612     p_format->i_aspect   = i_aspect;
 613
 614 #if 0
 615     /* Assume we have square pixels */
 616     if( i_width && i_height )
 617         p_format->i_aspect = i_width * VOUT_ASPECT_FACTOR / i_height;
 618     else
 619         p_format->i_aspect = 0;
 620 #endif
 621
 622     switch( i_chroma )
 623     {
 624         case FOURCC_YUVA:
 625             p_format->i_bits_per_pixel = 32;
 626             break;
 627         case FOURCC_I444:
 628         case FOURCC_J444:
 629             p_format->i_bits_per_pixel = 24;
 630             break;
 631         case FOURCC_I422:
 632         case FOURCC_YUY2:
 633         case FOURCC_UYVY:
 634         case FOURCC_J422:
 635             p_format->i_bits_per_pixel = 16;
 636             break;
 637         case FOURCC_I440:
 638         case FOURCC_J440:
 639             p_format->i_bits_per_pixel = 16;
 640             break;
 641         case FOURCC_I411:
 642         case FOURCC_YV12:
 643         case FOURCC_I420:
 644         case FOURCC_J420:
 645         case FOURCC_IYUV:
 646             p_format->i_bits_per_pixel = 12;
 647             break;
 648         case FOURCC_I410:
 649         case FOURCC_YVU9:
 650             p_format->i_bits_per_pixel = 9;
 651             break;
 652         case FOURCC_Y211:
 653             p_format->i_bits_per_pixel = 8;
 654             break;
 655         case FOURCC_YUVP:
 656             p_format->i_bits_per_pixel = 8;
 657             break;
 658
 659         case FOURCC_RV32:
 660         case FOURCC_RGBA:
 661             p_format->i_bits_per_pixel = 32;
 662             break;
 663         case FOURCC_RV24:
 664             p_format->i_bits_per_pixel = 24;
 665             break;
 666         case FOURCC_RV15:
 667         case FOURCC_RV16:
 668             p_format->i_bits_per_pixel = 16;
 669             break;
 670         case FOURCC_RGB2:
 671             p_format->i_bits_per_pixel = 8;
 672             break;
 673
 674         case FOURCC_GREY:
 675         case FOURCC_Y800:
 676         case FOURCC_Y8:
 677         case FOURCC_RGBP:
 678             p_format->i_bits_per_pixel = 8;
 679             break;
 680
 681         default:
 682             p_format->i_bits_per_pixel = 0;
 683             break;
 684     }
 685 }
 686
 687 /**
 688  * Initialise the picture_t fields given chroma/size.
 689  *
 690  * This function initializes most of the picture_t fields given a chroma and
 691  * size. It makes the assumption that stride == width.
 692  * \param p_this The calling object
 693  * \param p_pic Pointer to the picture to initialize
 694  * \param i_chroma The chroma fourcc to set
 695  * \param i_width The width of the picture
 696  * \param i_height The height of the picture
 697  * \param i_aspect The aspect ratio of the picture
 698  */
 699 int __vout_InitPicture( vlc_object_t *p_this, picture_t *p_pic,
 700                         vlc_fourcc_t i_chroma,
 701                         int i_width, int i_height, int i_aspect )
 702 {
 703     int i_index, i_width_aligned, i_height_aligned;
 704
 705     /* Store default values */
 706     for( i_index = 0; i_index < VOUT_MAX_PLANES; i_index++ )
 707     {
 708         p_pic->p[i_index].p_pixels = NULL;
 709         p_pic->p[i_index].i_pixel_pitch = 1;
 710     }
 711
 712     p_pic->pf_release = NULL;
 713     p_pic->pf_lock = NULL;
 714     p_pic->pf_unlock = NULL;
 715     p_pic->i_refcount = 0;
 716
 717     p_pic->i_qtype = QTYPE_NONE;
 718     p_pic->i_qstride = 0;
 719     p_pic->p_q = NULL;
 720
 721     vout_InitFormat( &p_pic->format, i_chroma, i_width, i_height, i_aspect );
 722
 723     /* Make sure the real dimensions are a multiple of 16 */
 724     i_width_aligned = (i_width + 15) >> 4 << 4;
 725     i_height_aligned = (i_height + 15) >> 4 << 4;
 726
 727     /* Calculate coordinates */
 728     switch( i_chroma )
 729     {
 730         case FOURCC_I411:
 731             p_pic->p[ Y_PLANE ].i_lines = i_height_aligned;
 732             p_pic->p[ Y_PLANE ].i_visible_lines = i_height;
 733             p_pic->p[ Y_PLANE ].i_pitch = i_width_aligned;
 734             p_pic->p[ Y_PLANE ].i_visible_pitch = i_width;
 735             p_pic->p[ U_PLANE ].i_lines = i_height_aligned;
 736             p_pic->p[ U_PLANE ].i_visible_lines = i_height;
 737             p_pic->p[ U_PLANE ].i_pitch = i_width_aligned / 4;
 738             p_pic->p[ U_PLANE ].i_visible_pitch = i_width / 4;
 739             p_pic->p[ V_PLANE ].i_lines = i_height_aligned;
 740             p_pic->p[ V_PLANE ].i_visible_lines = i_height;
 741             p_pic->p[ V_PLANE ].i_pitch = i_width_aligned / 4;
 742             p_pic->p[ V_PLANE ].i_visible_pitch = i_width / 4;
 743             p_pic->i_planes = 3;
 744             break;
 745
 746         case FOURCC_I410:
 747         case FOURCC_YVU9:
 748             p_pic->p[ Y_PLANE ].i_lines = i_height_aligned;
 749             p_pic->p[ Y_PLANE ].i_visible_lines = i_height;
 750             p_pic->p[ Y_PLANE ].i_pitch = i_width_aligned;
 751             p_pic->p[ Y_PLANE ].i_visible_pitch = i_width;
 752             p_pic->p[ U_PLANE ].i_lines = i_height_aligned / 4;
 753             p_pic->p[ U_PLANE ].i_visible_lines = i_height / 4;
 754             p_pic->p[ U_PLANE ].i_pitch = i_width_aligned / 4;
 755             p_pic->p[ U_PLANE ].i_visible_pitch = i_width / 4;
 756             p_pic->p[ V_PLANE ].i_lines = i_height_aligned / 4;
 757             p_pic->p[ V_PLANE ].i_visible_lines = i_height / 4;
 758             p_pic->p[ V_PLANE ].i_pitch = i_width_aligned / 4;
 759             p_pic->p[ V_PLANE ].i_visible_pitch = i_width / 4;
 760             p_pic->i_planes = 3;
 761             break;
 762
 763         case FOURCC_YV12:
 764         case FOURCC_I420:
 765         case FOURCC_IYUV:
 766         case FOURCC_J420:
 767             p_pic->p[ Y_PLANE ].i_lines = i_height_aligned;
 768             p_pic->p[ Y_PLANE ].i_visible_lines = i_height;
 769             p_pic->p[ Y_PLANE ].i_pitch = i_width_aligned;
 770             p_pic->p[ Y_PLANE ].i_visible_pitch = i_width;
 771             p_pic->p[ U_PLANE ].i_lines = i_height_aligned / 2;
 772             p_pic->p[ U_PLANE ].i_visible_lines = i_height / 2;
 773             p_pic->p[ U_PLANE ].i_pitch = i_width_aligned / 2;
 774             p_pic->p[ U_PLANE ].i_visible_pitch = i_width / 2;
 775             p_pic->p[ V_PLANE ].i_lines = i_height_aligned / 2;
 776             p_pic->p[ V_PLANE ].i_visible_lines = i_height / 2;
 777             p_pic->p[ V_PLANE ].i_pitch = i_width_aligned / 2;
 778             p_pic->p[ V_PLANE ].i_visible_pitch = i_width / 2;
 779             p_pic->i_planes = 3;
 780             break;
 781
 782         case FOURCC_I422:
 783         case FOURCC_J422:
 784             p_pic->p[ Y_PLANE ].i_lines = i_height_aligned;
 785             p_pic->p[ Y_PLANE ].i_visible_lines = i_height;
 786             p_pic->p[ Y_PLANE ].i_pitch = i_width_aligned;
 787             p_pic->p[ Y_PLANE ].i_visible_pitch = i_width;
 788             p_pic->p[ U_PLANE ].i_lines = i_height_aligned;
 789             p_pic->p[ U_PLANE ].i_visible_lines = i_height;
 790             p_pic->p[ U_PLANE ].i_pitch = i_width_aligned / 2;
 791             p_pic->p[ U_PLANE ].i_visible_pitch = i_width / 2;
 792             p_pic->p[ V_PLANE ].i_lines = i_height_aligned;
 793             p_pic->p[ V_PLANE ].i_visible_lines = i_height;
 794             p_pic->p[ V_PLANE ].i_pitch = i_width_aligned / 2;
 795             p_pic->p[ V_PLANE ].i_visible_pitch = i_width / 2;
 796             p_pic->i_planes = 3;
 797             break;
 798
 799         case FOURCC_I440:
 800         case FOURCC_J440:
 801             p_pic->p[ Y_PLANE ].i_lines = i_height_aligned;
 802             p_pic->p[ Y_PLANE ].i_visible_lines = i_height;
 803             p_pic->p[ Y_PLANE ].i_pitch = i_width_aligned;
 804             p_pic->p[ Y_PLANE ].i_visible_pitch = i_width;
 805             p_pic->p[ U_PLANE ].i_lines = i_height_aligned / 2;
 806             p_pic->p[ U_PLANE ].i_visible_lines = i_height / 2;
 807             p_pic->p[ U_PLANE ].i_pitch = i_width_aligned;
 808             p_pic->p[ U_PLANE ].i_visible_pitch = i_width;
 809             p_pic->p[ V_PLANE ].i_lines = i_height_aligned / 2;
 810             p_pic->p[ V_PLANE ].i_visible_lines = i_height / 2;
 811             p_pic->p[ V_PLANE ].i_pitch = i_width_aligned;
 812             p_pic->p[ V_PLANE ].i_visible_pitch = i_width;
 813             p_pic->i_planes = 3;
 814             break;
 815
 816         case FOURCC_I444:
 817         case FOURCC_J444:
 818             p_pic->p[ Y_PLANE ].i_lines = i_height_aligned;
 819             p_pic->p[ Y_PLANE ].i_visible_lines = i_height;
 820             p_pic->p[ Y_PLANE ].i_pitch = i_width_aligned;
 821             p_pic->p[ Y_PLANE ].i_visible_pitch = i_width;
 822             p_pic->p[ U_PLANE ].i_lines = i_height_aligned;
 823             p_pic->p[ U_PLANE ].i_visible_lines = i_height;
 824             p_pic->p[ U_PLANE ].i_pitch = i_width_aligned;
 825             p_pic->p[ U_PLANE ].i_visible_pitch = i_width;
 826             p_pic->p[ V_PLANE ].i_lines = i_height_aligned;
 827             p_pic->p[ V_PLANE ].i_visible_lines = i_height;
 828             p_pic->p[ V_PLANE ].i_pitch = i_width_aligned;
 829             p_pic->p[ V_PLANE ].i_visible_pitch = i_width;
 830             p_pic->i_planes = 3;
 831             break;
 832
 833         case FOURCC_YUVA:
 834             p_pic->p[ Y_PLANE ].i_lines = i_height_aligned;
 835             p_pic->p[ Y_PLANE ].i_visible_lines = i_height;
 836             p_pic->p[ Y_PLANE ].i_pitch = i_width_aligned;
 837             p_pic->p[ Y_PLANE ].i_visible_pitch = i_width;
 838             p_pic->p[ U_PLANE ].i_lines = i_height_aligned;
 839             p_pic->p[ U_PLANE ].i_visible_lines = i_height;
 840             p_pic->p[ U_PLANE ].i_pitch = i_width_aligned;
 841             p_pic->p[ U_PLANE ].i_visible_pitch = i_width;
 842             p_pic->p[ V_PLANE ].i_lines = i_height_aligned;
 843             p_pic->p[ V_PLANE ].i_visible_lines = i_height;
 844             p_pic->p[ V_PLANE ].i_pitch = i_width_aligned;
 845             p_pic->p[ V_PLANE ].i_visible_pitch = i_width;
 846             p_pic->p[ A_PLANE ].i_lines = i_height_aligned;
 847             p_pic->p[ A_PLANE ].i_visible_lines = i_height;
 848             p_pic->p[ A_PLANE ].i_pitch = i_width_aligned;
 849             p_pic->p[ A_PLANE ].i_visible_pitch = i_width;
 850             p_pic->i_planes = 4;
 851             break;
 852
 853         case FOURCC_YUVP:
 854             p_pic->p->i_lines = i_height_aligned;
 855             p_pic->p->i_visible_lines = i_height;
 856             p_pic->p->i_pitch = i_width_aligned;
 857             p_pic->p->i_visible_pitch = i_width;
 858             p_pic->p->i_pixel_pitch = 8;
 859             p_pic->i_planes = 1;
 860             break;
 861
 862         case FOURCC_Y211:
 863             p_pic->p->i_lines = i_height_aligned;
 864             p_pic->p->i_visible_lines = i_height;
 865             p_pic->p->i_pitch = i_width_aligned;
 866             p_pic->p->i_visible_pitch = i_width;
 867             p_pic->p->i_pixel_pitch = 4;
 868             p_pic->i_planes = 1;
 869             break;
 870
 871         case FOURCC_UYVY:
 872         case FOURCC_YUY2:
 873             p_pic->p->i_lines = i_height_aligned;
 874             p_pic->p->i_visible_lines = i_height;
 875             p_pic->p->i_pitch = i_width_aligned * 2;
 876             p_pic->p->i_visible_pitch = i_width * 2;
 877             p_pic->p->i_pixel_pitch = 4;
 878             p_pic->i_planes = 1;
 879             break;
 880
 881         case FOURCC_RGB2:
 882             p_pic->p->i_lines = i_height_aligned;
 883             p_pic->p->i_visible_lines = i_height;
 884             p_pic->p->i_pitch = i_width_aligned;
 885             p_pic->p->i_visible_pitch = i_width;
 886             p_pic->p->i_pixel_pitch = 1;
 887             p_pic->i_planes = 1;
 888             break;
 889
 890         case FOURCC_RV15:
 891             p_pic->p->i_lines = i_height_aligned;
 892             p_pic->p->i_visible_lines = i_height;
 893             p_pic->p->i_pitch = i_width_aligned * 2;
 894             p_pic->p->i_visible_pitch = i_width * 2;
 895             p_pic->p->i_pixel_pitch = 2;
 896             p_pic->i_planes = 1;
 897             break;
 898
 899         case FOURCC_RV16:
 900             p_pic->p->i_lines = i_height_aligned;
 901             p_pic->p->i_visible_lines = i_height;
 902             p_pic->p->i_pitch = i_width_aligned * 2;
 903             p_pic->p->i_visible_pitch = i_width * 2;
 904             p_pic->p->i_pixel_pitch = 2;
 905             p_pic->i_planes = 1;
 906             break;
 907
 908         case FOURCC_RV24:
 909             p_pic->p->i_lines = i_height_aligned;
 910             p_pic->p->i_visible_lines = i_height;
 911             p_pic->p->i_pitch = i_width_aligned * 3;
 912             p_pic->p->i_visible_pitch = i_width * 3;
 913             p_pic->p->i_pixel_pitch = 3;
 914             p_pic->i_planes = 1;
 915             break;
 916
 917         case FOURCC_RV32:
 918         case FOURCC_RGBA:
 919             p_pic->p->i_lines = i_height_aligned;
 920             p_pic->p->i_visible_lines = i_height;
 921             p_pic->p->i_pitch = i_width_aligned * 4;
 922             p_pic->p->i_visible_pitch = i_width * 4;
 923             p_pic->p->i_pixel_pitch = 4;
 924             p_pic->i_planes = 1;
 925             break;
 926
 927         case FOURCC_GREY:
 928         case FOURCC_Y800:
 929         case FOURCC_Y8:
 930         case FOURCC_RGBP:
 931             p_pic->p->i_lines = i_height_aligned;
 932             p_pic->p->i_visible_lines = i_height;
 933             p_pic->p->i_pitch = i_width_aligned;
 934             p_pic->p->i_visible_pitch = i_width;
 935             p_pic->p->i_pixel_pitch = 1;
 936             p_pic->i_planes = 1;
 937             break;
 938
 939         default:
 940             if( p_this )
 941                 msg_Err( p_this, "unknown chroma type 0x%.8x (%4.4s)",
 942                                  i_chroma, (char*)&i_chroma );
 943             p_pic->i_planes = 0;
 944             return VLC_EGENERIC;
 945     }
 946
 947     return VLC_SUCCESS;
 948 }
 949
 950 /**
 951  * Compare two chroma values
 952  *
 953  * This function returns 1 if the two fourcc values given as argument are
 954  * the same format (eg. UYVY/UYNV) or almost the same format (eg. I420/YV12)
 955  */
 956 int vout_ChromaCmp( vlc_fourcc_t i_chroma, vlc_fourcc_t i_amorhc )
 957 {
 958     static const vlc_fourcc_t p_I420[] = {
 959         FOURCC_I420, FOURCC_IYUV, FOURCC_YV12, FOURCC_J420, 0
 960     };
 961     static const vlc_fourcc_t p_I422[] = {
 962         FOURCC_I422, FOURCC_J422, 0
 963     };
 964     static const vlc_fourcc_t p_I440[] = {
 965         FOURCC_I440, FOURCC_J440, 0
 966     };
 967     static const vlc_fourcc_t p_I444[] = {
 968         FOURCC_I444, FOURCC_J444, 0
 969     };
 970     static const vlc_fourcc_t p_UYVY[] = {
 971         FOURCC_UYVY, FOURCC_UYNV, FOURCC_Y422, 0
 972     };
 973     static const vlc_fourcc_t p_YUYV[] = {
 974         FOURCC_YUY2, FOURCC_YUNV, 0
 975     };
 976     static const vlc_fourcc_t p_GREY[] = {
 977         FOURCC_GREY, FOURCC_Y800, FOURCC_Y8, 0
 978     };
 979     static const vlc_fourcc_t *pp_fcc[] = {
 980         p_I420, p_I422, p_I440, p_I444, p_UYVY, p_YUYV, p_GREY, NULL
 981     };
 982
 983     /* If they are the same, they are the same ! */
 984     if( i_chroma == i_amorhc )
 985         return 1;
 986
 987     /* Check for equivalence classes */
 988     for( int i = 0; pp_fcc[i] != NULL; i++ )
 989     {
 990         bool b_fcc1 = false;
 991         bool b_fcc2 = false;
 992         for( int j = 0; pp_fcc[i][j] != 0; j++ )
 993         {
 994             if( i_chroma == pp_fcc[i][j] )
 995                 b_fcc1 = true;
 996             if( i_amorhc == pp_fcc[i][j] )
 997                 b_fcc2 = true;
 998         }
 999         if( b_fcc1 && b_fcc2 )
1000             return 1;
1001     }
1002     return 0;
1003 }
1004
1005 /*****************************************************************************
1006  *
1007  *****************************************************************************/
1008 static void PictureReleaseCallback( picture_t *p_picture )
1009 {
1010     if( --p_picture->i_refcount > 0 )
1011         return;
1012     picture_Delete( p_picture );
1013 }
1014 /*****************************************************************************
1015  *
1016  *****************************************************************************/
1017 picture_t *picture_New( vlc_fourcc_t i_chroma, int i_width, int i_height, int i_aspect )
1018 {
1019     picture_t *p_picture = calloc( 1, sizeof(*p_picture) );
1020     if( !p_picture )
1021         return NULL;
1022
1023     if( __vout_AllocatePicture( NULL, p_picture,
1024                                 i_chroma, i_width, i_height, i_aspect ) )
1025     {
1026         free( p_picture );
1027         return NULL;
1028     }
1029
1030     p_picture->i_refcount = 1;
1031     p_picture->pf_release = PictureReleaseCallback;
1032     p_picture->i_status = RESERVED_PICTURE;
1033
1034     return p_picture;
1035 }
1036
1037 /*****************************************************************************
1038  *
1039  *****************************************************************************/
1040 void picture_Delete( picture_t *p_picture )
1041 {
1042     assert( p_picture && p_picture->i_refcount == 0 );
1043
1044     free( p_picture->p_q );
1045     free( p_picture->p_data_orig );
1046     free( p_picture->p_sys );
1047     free( p_picture );
1048 }
1049
1050 /*****************************************************************************
1051  *
1052  *****************************************************************************/
1053 void picture_CopyPixels( picture_t *p_dst, const picture_t *p_src )
1054 {
1055     int i;
1056
1057     for( i = 0; i < p_src->i_planes ; i++ )
1058         plane_CopyPixels( p_dst->p+i, p_src->p+i );
1059 }
1060
1061 void plane_CopyPixels( plane_t *p_dst, const plane_t *p_src )
1062 {
1063     const unsigned i_width  = __MIN( p_dst->i_visible_pitch,
1064                                      p_src->i_visible_pitch );
1065     const unsigned i_height = __MIN( p_dst->i_visible_lines,
1066                                      p_src->i_visible_lines );
1067
1068     if( p_src->i_pitch == p_dst->i_pitch )
1069     {
1070         /* There are margins, but with the same width : perfect ! */
1071         vlc_memcpy( p_dst->p_pixels, p_src->p_pixels,
1072                     p_src->i_pitch * i_height );
1073     }
1074     else
1075     {
1076         /* We need to proceed line by line */
1077         uint8_t *p_in = p_src->p_pixels;
1078         uint8_t *p_out = p_dst->p_pixels;
1079         int i_line;
1080
1081         assert( p_in );
1082         assert( p_out );
1083
1084         for( i_line = i_height; i_line--; )
1085         {
1086             vlc_memcpy( p_out, p_in, i_width );
1087             p_in += p_src->i_pitch;
1088             p_out += p_dst->i_pitch;
1089         }
1090     }
1091 }
1092
1093 /*****************************************************************************
1094  *
1095  *****************************************************************************/
1096 int picture_Export( vlc_object_t *p_obj,
1097                     block_t **pp_image,
1098                     video_format_t *p_fmt,
1099                     picture_t *p_picture,
1100                     vlc_fourcc_t i_format,
1101                     int i_override_width, int i_override_height )
1102 {
1103     /* */
1104     video_format_t fmt_in = p_picture->format;
1105     if( fmt_in.i_sar_num <= 0 || fmt_in.i_sar_den <= 0 )
1106     {
1107         fmt_in.i_sar_num =
1108         fmt_in.i_sar_den = 1;
1109     }
1110
1111     /* */
1112     video_format_t fmt_out;
1113     memset( &fmt_out, 0, sizeof(fmt_out) );
1114     fmt_out.i_sar_num =
1115     fmt_out.i_sar_den = 1;
1116     fmt_out.i_chroma  = i_format;
1117     fmt_out.i_width   = i_override_width;
1118     fmt_out.i_height  = i_override_height;
1119
1120     if( fmt_out.i_height == 0 && fmt_out.i_width > 0 )
1121     {
1122         fmt_out.i_height = fmt_in.i_height * fmt_out.i_width / fmt_in.i_width;
1123         const int i_height = fmt_out.i_height * fmt_in.i_sar_den / fmt_in.i_sar_num;
1124         if( i_height > 0 )
1125             fmt_out.i_height = i_height;
1126     }
1127     else
1128     {
1129         if( fmt_out.i_width == 0 && fmt_out.i_height > 0 )
1130         {
1131             fmt_out.i_width = fmt_in.i_width * fmt_out.i_height / fmt_in.i_height;
1132         }
1133         else
1134         {
1135             fmt_out.i_width = fmt_in.i_width;
1136             fmt_out.i_height = fmt_in.i_height;
1137         }
1138         const int i_width = fmt_out.i_width * fmt_in.i_sar_num / fmt_in.i_sar_den;
1139         if( i_width > 0 )
1140             fmt_out.i_width = i_width;
1141     }
1142
1143     image_handler_t *p_image = image_HandlerCreate( p_obj );
1144
1145     block_t *p_block = image_Write( p_image, p_picture, &fmt_in, &fmt_out );
1146
1147     image_HandlerDelete( p_image );
1148
1149     if( !p_block )
1150         return VLC_EGENERIC;
1151
1152     p_block->i_pts =
1153     p_block->i_dts = p_picture->date;
1154
1155     if( p_fmt )
1156         *p_fmt = fmt_out;
1157     *pp_image = p_block;
1158
1159     return VLC_SUCCESS;
1160 }
1161
1162 /*****************************************************************************
1163  *
1164  *****************************************************************************/
1165