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 "vout_pictures.h"
  40 #include "vout_internal.h"
  41
  42 /**
  43  * Display a picture
  44  *
  45  * Remove the reservation flag of a picture, which will cause it to be ready
  46  * for display.
  47  */
  48 void vout_DisplayPicture( vout_thread_t *p_vout, picture_t *p_pic )
  49 {
  50     vlc_mutex_lock( &p_vout->picture_lock );
  51
  52     if( p_pic->i_status == RESERVED_PICTURE )
  53     {
  54         p_pic->i_status = READY_PICTURE;
  55         vlc_cond_signal( &p_vout->p->picture_wait );
  56     }
  57     else
  58     {
  59         msg_Err( p_vout, "picture to display %p has invalid status %d",
  60                          p_pic, p_pic->i_status );
  61     }
  62
  63     vlc_mutex_unlock( &p_vout->picture_lock );
  64 }
  65
  66 /**
  67  * Allocate a picture in the video output heap.
  68  *
  69  * This function creates a reserved image in the video output heap.
  70  * A null pointer is returned if the function fails. This method provides an
  71  * already allocated zone of memory in the picture data fields.
  72  * It needs locking since several pictures can be created by several producers
  73  * threads.
  74  */
  75 int vout_CountPictureAvailable( vout_thread_t *p_vout )
  76 {
  77     int i_free = 0;
  78     int i_pic;
  79
  80     vlc_mutex_lock( &p_vout->picture_lock );
  81     for( i_pic = 0; i_pic < I_RENDERPICTURES; i_pic++ )
  82     {
  83         picture_t *p_pic = PP_RENDERPICTURE[(p_vout->render.i_last_used_pic + i_pic + 1) % I_RENDERPICTURES];
  84
  85         switch( p_pic->i_status )
  86         {
  87             case DESTROYED_PICTURE:
  88                 i_free++;
  89                 break;
  90
  91             case FREE_PICTURE:
  92                 i_free++;
  93                 break;
  94
  95             default:
  96                 break;
  97         }
  98     }
  99     vlc_mutex_unlock( &p_vout->picture_lock );
 100
 101     return i_free;
 102 }
 103
 104 picture_t *vout_CreatePicture( vout_thread_t *p_vout,
 105                                bool b_progressive,
 106                                bool b_top_field_first,
 107                                unsigned int i_nb_fields )
 108 {
 109     int         i_pic;                                      /* picture index */
 110     picture_t * p_pic;
 111     picture_t * p_freepic = NULL;                      /* first free picture */
 112
 113     /* Get lock */
 114     vlc_mutex_lock( &p_vout->picture_lock );
 115
 116     /*
 117      * Look for an empty place in the picture heap.
 118      */
 119     for( i_pic = 0; i_pic < I_RENDERPICTURES; i_pic++ )
 120     {
 121         p_pic = PP_RENDERPICTURE[(p_vout->render.i_last_used_pic + i_pic + 1)
 122                                  % I_RENDERPICTURES];
 123
 124         switch( p_pic->i_status )
 125         {
 126             case DESTROYED_PICTURE:
 127                 /* Memory will not be reallocated, and function can end
 128                  * immediately - this is the best possible case, since no
 129                  * memory allocation needs to be done */
 130                 p_pic->i_status   = RESERVED_PICTURE;
 131                 p_pic->i_refcount = 0;
 132                 p_pic->b_force    = 0;
 133
 134                 p_pic->b_progressive        = b_progressive;
 135                 p_pic->i_nb_fields          = i_nb_fields;
 136                 p_pic->b_top_field_first    = b_top_field_first;
 137
 138                 p_vout->i_heap_size++;
 139                 p_vout->render.i_last_used_pic =
 140                     ( p_vout->render.i_last_used_pic + i_pic + 1 )
 141                     % I_RENDERPICTURES;
 142                 vlc_mutex_unlock( &p_vout->picture_lock );
 143                 return( p_pic );
 144
 145             case FREE_PICTURE:
 146                 /* Picture is empty and ready for allocation */
 147                 p_vout->render.i_last_used_pic =
 148                     ( p_vout->render.i_last_used_pic + i_pic + 1 )
 149                     % I_RENDERPICTURES;
 150                 p_freepic = p_pic;
 151                 break;
 152
 153             default:
 154                 break;
 155         }
 156     }
 157
 158     /*
 159      * Prepare picture
 160      */
 161     if( p_freepic != NULL )
 162     {
 163         vout_AllocatePicture( VLC_OBJECT(p_vout),
 164                               p_freepic, p_vout->render.i_chroma,
 165                               p_vout->render.i_width, p_vout->render.i_height,
 166                               p_vout->render.i_aspect );
 167
 168         if( p_freepic->i_planes )
 169         {
 170             /* Copy picture information, set some default values */
 171             p_freepic->i_status   = RESERVED_PICTURE;
 172             p_freepic->i_type     = MEMORY_PICTURE;
 173             p_freepic->b_slow     = 0;
 174
 175             p_freepic->i_refcount = 0;
 176             p_freepic->b_force = 0;
 177
 178             p_freepic->b_progressive        = b_progressive;
 179             p_freepic->i_nb_fields          = i_nb_fields;
 180             p_freepic->b_top_field_first    = b_top_field_first;
 181
 182             p_vout->i_heap_size++;
 183         }
 184         else
 185         {
 186             /* Memory allocation failed : set picture as empty */
 187             p_freepic->i_status = FREE_PICTURE;
 188             p_freepic = NULL;
 189
 190             msg_Err( p_vout, "picture allocation failed" );
 191         }
 192
 193         vlc_mutex_unlock( &p_vout->picture_lock );
 194
 195         return( p_freepic );
 196     }
 197
 198     /* No free or destroyed picture could be found, but the decoder
 199      * will try again in a while. */
 200     vlc_mutex_unlock( &p_vout->picture_lock );
 201
 202     return( NULL );
 203 }
 204
 205 /* */
 206 static void DestroyPicture( vout_thread_t *p_vout, picture_t *p_picture )
 207 {
 208     vlc_assert_locked( &p_vout->picture_lock );
 209
 210     p_picture->i_status = DESTROYED_PICTURE;
 211     p_vout->i_heap_size--;
 212     picture_CleanupQuant( p_picture );
 213
 214     vlc_cond_signal( &p_vout->p->picture_wait );
 215 }
 216
 217 /**
 218  * Remove a permanent or reserved picture from the heap
 219  *
 220  * This function frees a previously reserved picture or a permanent
 221  * picture. It is meant to be used when the construction of a picture aborted.
 222  * Note that the picture will be destroyed even if it is linked !
 223  *
 224  * TODO remove it, vout_DropPicture should be used instead
 225  */
 226 void vout_DestroyPicture( vout_thread_t *p_vout, picture_t *p_pic )
 227 {
 228 #ifndef NDEBUG
 229     /* Check if picture status is valid */
 230     vlc_mutex_lock( &p_vout->picture_lock );
 231     if( p_pic->i_status != RESERVED_PICTURE )
 232     {
 233         msg_Err( p_vout, "picture to destroy %p has invalid status %d",
 234                          p_pic, p_pic->i_status );
 235     }
 236     vlc_mutex_unlock( &p_vout->picture_lock );
 237 #endif
 238
 239     vout_DropPicture( p_vout, p_pic );
 240 }
 241
 242 /* */
 243 void vout_UsePictureLocked( vout_thread_t *p_vout, picture_t *p_picture )
 244 {
 245     vlc_assert_locked( &p_vout->picture_lock );
 246     if( p_picture->i_refcount > 0 )
 247     {
 248         /* Pretend we displayed the picture, but don't destroy
 249          * it since the decoder might still need it. */
 250         p_picture->i_status = DISPLAYED_PICTURE;
 251     }
 252     else
 253     {
 254         /* Destroy the picture without displaying it */
 255         DestroyPicture( p_vout, p_picture );
 256     }
 257 }
 258
 259 /* */
 260 void vout_DropPicture( vout_thread_t *p_vout, picture_t *p_pic  )
 261 {
 262     vlc_mutex_lock( &p_vout->picture_lock );
 263
 264     if( p_pic->i_status == READY_PICTURE )
 265     {
 266         /* Grr cannot destroy ready picture by myself so be sure vout won't like it */
 267         p_pic->date = 1;
 268         vlc_cond_signal( &p_vout->p->picture_wait );
 269     }
 270     else
 271     {
 272         vout_UsePictureLocked( p_vout, p_pic );
 273     }
 274
 275     vlc_mutex_unlock( &p_vout->picture_lock );
 276 }
 277
 278 /**
 279  * Increment reference counter of a picture
 280  *
 281  * This function increments the reference counter of a picture in the video
 282  * heap. It needs a lock since several producer threads can access the picture.
 283  */
 284 void vout_LinkPicture( vout_thread_t *p_vout, picture_t *p_pic )
 285 {
 286     vlc_mutex_lock( &p_vout->picture_lock );
 287     p_pic->i_refcount++;
 288     vlc_mutex_unlock( &p_vout->picture_lock );
 289 }
 290
 291 /**
 292  * Decrement reference counter of a picture
 293  *
 294  * This function decrement the reference counter of a picture in the video heap
 295  */
 296 void vout_UnlinkPicture( vout_thread_t *p_vout, picture_t *p_pic )
 297 {
 298     vlc_mutex_lock( &p_vout->picture_lock );
 299
 300     if( p_pic->i_refcount > 0 )
 301         p_pic->i_refcount--;
 302     else
 303         msg_Err( p_vout, "Invalid picture reference count (%p, %d)",
 304                  p_pic, p_pic->i_refcount );
 305
 306     if( p_pic->i_refcount == 0 && p_pic->i_status == DISPLAYED_PICTURE )
 307         DestroyPicture( p_vout, p_pic );
 308
 309     vlc_mutex_unlock( &p_vout->picture_lock );
 310 }
 311
 312 static int vout_LockPicture( vout_thread_t *p_vout, picture_t *p_picture )
 313 {
 314     if( p_picture->pf_lock )
 315         return p_picture->pf_lock( p_vout, p_picture );
 316     return VLC_SUCCESS;
 317 }
 318 static void vout_UnlockPicture( vout_thread_t *p_vout, picture_t *p_picture )
 319 {
 320     if( p_picture->pf_unlock )
 321         p_picture->pf_unlock( p_vout, p_picture );
 322 }
 323
 324 /**
 325  * Render a picture
 326  *
 327  * This function chooses whether the current picture needs to be copied
 328  * before rendering, does the subpicture magic, and tells the video output
 329  * thread which direct buffer needs to be displayed.
 330  */
 331 picture_t *vout_RenderPicture( vout_thread_t *p_vout, picture_t *p_pic,
 332                                subpicture_t *p_subpic, bool b_paused )
 333 {
 334     if( p_pic == NULL )
 335         return NULL;
 336
 337     if( p_pic->i_type == DIRECT_PICTURE )
 338     {
 339         /* Picture is in a direct buffer. */
 340
 341         if( p_subpic != NULL )
 342         {
 343             /* We have subtitles. First copy the picture to
 344              * the spare direct buffer, then render the
 345              * subtitles. */
 346             if( vout_LockPicture( p_vout, PP_OUTPUTPICTURE[0] ) )
 347                 return NULL;
 348
 349             picture_Copy( PP_OUTPUTPICTURE[0], p_pic );
 350
 351             spu_RenderSubpictures( p_vout->p_spu,
 352                                    PP_OUTPUTPICTURE[0], &p_vout->fmt_out,
 353                                    p_subpic, &p_vout->fmt_in, b_paused );
 354
 355             vout_UnlockPicture( p_vout, PP_OUTPUTPICTURE[0] );
 356
 357             return PP_OUTPUTPICTURE[0];
 358         }
 359
 360         /* No subtitles, picture is in a directbuffer so
 361          * we can display it directly (even if it is still
 362          * in use or not). */
 363         return p_pic;
 364     }
 365
 366     /* Not a direct buffer. We either need to copy it to a direct buffer,
 367      * or render it if the chroma isn't the same. */
 368     if( p_vout->p->b_direct )
 369     {
 370         /* Picture is not in a direct buffer, but is exactly the
 371          * same size as the direct buffers. A memcpy() is enough,
 372          * then render the subtitles. */
 373
 374         if( vout_LockPicture( p_vout, PP_OUTPUTPICTURE[0] ) )
 375             return NULL;
 376
 377         picture_Copy( PP_OUTPUTPICTURE[0], p_pic );
 378         spu_RenderSubpictures( p_vout->p_spu,
 379                                PP_OUTPUTPICTURE[0], &p_vout->fmt_out,
 380                                p_subpic, &p_vout->fmt_in, b_paused );
 381
 382         vout_UnlockPicture( p_vout, PP_OUTPUTPICTURE[0] );
 383
 384         return PP_OUTPUTPICTURE[0];
 385     }
 386
 387     /* Picture is not in a direct buffer, and needs to be converted to
 388      * another size/chroma. Then the subtitles need to be rendered as
 389      * well. This usually means software YUV, or hardware YUV with a
 390      * different chroma. */
 391
 392     if( p_subpic != NULL && p_vout->p_picture[0].b_slow )
 393     {
 394         /* The picture buffer is in slow memory. We'll use
 395          * the "2 * VOUT_MAX_PICTURES + 1" picture as a temporary
 396          * one for subpictures rendering. */
 397         picture_t *p_tmp_pic = &p_vout->p_picture[2 * VOUT_MAX_PICTURES];
 398         if( p_tmp_pic->i_status == FREE_PICTURE )
 399         {
 400             vout_AllocatePicture( VLC_OBJECT(p_vout),
 401                                   p_tmp_pic, p_vout->fmt_out.i_chroma,
 402                                   p_vout->fmt_out.i_width,
 403                                   p_vout->fmt_out.i_height,
 404                                   p_vout->fmt_out.i_aspect );
 405             p_tmp_pic->i_type = MEMORY_PICTURE;
 406             p_tmp_pic->i_status = RESERVED_PICTURE;
 407             /* some modules (such as blend)  needs to know the extra information in picture heap */
 408             p_tmp_pic->p_heap = &p_vout->output;
 409         }
 410
 411         /* Convert image to the first direct buffer */
 412         p_vout->p->p_chroma->p_owner = (filter_owner_sys_t *)p_tmp_pic;
 413         p_vout->p->p_chroma->pf_video_filter( p_vout->p->p_chroma, p_pic );
 414
 415         /* Render subpictures on the first direct buffer */
 416         spu_RenderSubpictures( p_vout->p_spu,
 417                                p_tmp_pic, &p_vout->fmt_out,
 418                                p_subpic, &p_vout->fmt_in, b_paused );
 419
 420         if( vout_LockPicture( p_vout, &p_vout->p_picture[0] ) )
 421             return NULL;
 422
 423         picture_Copy( &p_vout->p_picture[0], p_tmp_pic );
 424     }
 425     else
 426     {
 427         if( vout_LockPicture( p_vout, &p_vout->p_picture[0] ) )
 428             return NULL;
 429
 430         /* Convert image to the first direct buffer */
 431         p_vout->p->p_chroma->p_owner = (filter_owner_sys_t *)&p_vout->p_picture[0];
 432         p_vout->p->p_chroma->pf_video_filter( p_vout->p->p_chroma, p_pic );
 433
 434         /* Render subpictures on the first direct buffer */
 435         spu_RenderSubpictures( p_vout->p_spu,
 436                                &p_vout->p_picture[0], &p_vout->fmt_out,
 437                                p_subpic, &p_vout->fmt_in, b_paused );
 438     }
 439
 440     vout_UnlockPicture( p_vout, &p_vout->p_picture[0] );
 441
 442     return &p_vout->p_picture[0];
 443 }
 444
 445 /**
 446  * Calculate image window coordinates
 447  *
 448  * This function will be accessed by plugins. It calculates the relative
 449  * position of the output window and the image window.
 450  */
 451 void vout_PlacePicture( vout_thread_t *p_vout,
 452                         unsigned int i_width, unsigned int i_height,
 453                         unsigned int *pi_x, unsigned int *pi_y,
 454                         unsigned int *pi_width, unsigned int *pi_height )
 455 {
 456     if( (i_width <= 0) || (i_height <=0) )
 457     {
 458         *pi_width = *pi_height = *pi_x = *pi_y = 0;
 459         return;
 460     }
 461
 462     if( p_vout->b_scale )
 463     {
 464         *pi_width = i_width;
 465         *pi_height = i_height;
 466     }
 467     else
 468     {
 469         *pi_width = __MIN( i_width, p_vout->fmt_in.i_visible_width );
 470         *pi_height = __MIN( i_height, p_vout->fmt_in.i_visible_height );
 471     }
 472
 473      int64_t i_scaled_width = p_vout->fmt_in.i_visible_width * (int64_t)p_vout->fmt_in.i_sar_num *
 474                               *pi_height / p_vout->fmt_in.i_visible_height / p_vout->fmt_in.i_sar_den;
 475      int64_t i_scaled_height = p_vout->fmt_in.i_visible_height * (int64_t)p_vout->fmt_in.i_sar_den *
 476                                *pi_width / p_vout->fmt_in.i_visible_width / p_vout->fmt_in.i_sar_num;
 477
 478     if( i_scaled_width <= 0 || i_scaled_height <= 0 )
 479     {
 480         msg_Warn( p_vout, "ignoring broken aspect ratio" );
 481         i_scaled_width = *pi_width;
 482         i_scaled_height = *pi_height;
 483     }
 484
 485     if( i_scaled_width > *pi_width )
 486         *pi_height = i_scaled_height;
 487     else
 488         *pi_width = i_scaled_width;
 489
 490     switch( p_vout->i_alignment & VOUT_ALIGN_HMASK )
 491     {
 492     case VOUT_ALIGN_LEFT:
 493         *pi_x = 0;
 494         break;
 495     case VOUT_ALIGN_RIGHT:
 496         *pi_x = i_width - *pi_width;
 497         break;
 498     default:
 499         *pi_x = ( i_width - *pi_width ) / 2;
 500     }
 501
 502     switch( p_vout->i_alignment & VOUT_ALIGN_VMASK )
 503     {
 504     case VOUT_ALIGN_TOP:
 505         *pi_y = 0;
 506         break;
 507     case VOUT_ALIGN_BOTTOM:
 508         *pi_y = i_height - *pi_height;
 509         break;
 510     default:
 511         *pi_y = ( i_height - *pi_height ) / 2;
 512     }
 513 }
 514
 515 /**
 516  * Allocate a new picture in the heap.
 517  *
 518  * This function allocates a fake direct buffer in memory, which can be
 519  * used exactly like a video buffer. The video output thread then manages
 520  * how it gets displayed.
 521  */
 522 int __vout_AllocatePicture( vlc_object_t *p_this, picture_t *p_pic,
 523                             vlc_fourcc_t i_chroma,
 524                             int i_width, int i_height, int i_aspect )
 525 {
 526     int i_bytes, i_index, i_width_aligned, i_height_aligned;
 527
 528     /* Make sure the real dimensions are a multiple of 16 */
 529     i_width_aligned = (i_width + 15) >> 4 << 4;
 530     i_height_aligned = (i_height + 15) >> 4 << 4;
 531
 532     if( vout_InitPicture( p_this, p_pic, i_chroma,
 533                           i_width, i_height, i_aspect ) != VLC_SUCCESS )
 534     {
 535         p_pic->i_planes = 0;
 536         return VLC_EGENERIC;
 537     }
 538
 539     /* Calculate how big the new image should be */
 540     i_bytes = p_pic->format.i_bits_per_pixel *
 541         i_width_aligned * i_height_aligned / 8;
 542
 543     p_pic->p_data = vlc_memalign( &p_pic->p_data_orig, 16, i_bytes );
 544
 545     if( p_pic->p_data == NULL )
 546     {
 547         p_pic->i_planes = 0;
 548         return VLC_EGENERIC;
 549     }
 550
 551     /* Fill the p_pixels field for each plane */
 552     p_pic->p[ 0 ].p_pixels = p_pic->p_data;
 553
 554     for( i_index = 1; i_index < p_pic->i_planes; i_index++ )
 555     {
 556         p_pic->p[i_index].p_pixels = p_pic->p[i_index-1].p_pixels +
 557             p_pic->p[i_index-1].i_lines * p_pic->p[i_index-1].i_pitch;
 558     }
 559
 560     return VLC_SUCCESS;
 561 }
 562
 563 /**
 564  * Initialise the video format fields given chroma/size.
 565  *
 566  * This function initializes all the video_frame_format_t fields given the
 567  * static properties of a picture (chroma and size).
 568  * \param p_format Pointer to the format structure to initialize
 569  * \param i_chroma Chroma to set
 570  * \param i_width Width to set
 571  * \param i_height Height to set
 572  * \param i_aspect Aspect ratio
 573  */
 574 void vout_InitFormat( video_frame_format_t *p_format, vlc_fourcc_t i_chroma,
 575                       int i_width, int i_height, int i_aspect )
 576 {
 577     p_format->i_chroma   = i_chroma;
 578     p_format->i_width    = p_format->i_visible_width  = i_width;
 579     p_format->i_height   = p_format->i_visible_height = i_height;
 580     p_format->i_x_offset = p_format->i_y_offset = 0;
 581     p_format->i_aspect   = i_aspect;
 582
 583 #if 0
 584     /* Assume we have square pixels */
 585     if( i_width && i_height )
 586         p_format->i_aspect = i_width * VOUT_ASPECT_FACTOR / i_height;
 587     else
 588         p_format->i_aspect = 0;
 589 #endif
 590
 591     switch( i_chroma )
 592     {
 593         case FOURCC_YUVA:
 594             p_format->i_bits_per_pixel = 32;
 595             break;
 596         case FOURCC_I444:
 597         case FOURCC_J444:
 598             p_format->i_bits_per_pixel = 24;
 599             break;
 600         case FOURCC_I422:
 601         case FOURCC_YUY2:
 602         case FOURCC_UYVY:
 603         case FOURCC_J422:
 604             p_format->i_bits_per_pixel = 16;
 605             break;
 606         case FOURCC_I440:
 607         case FOURCC_J440:
 608             p_format->i_bits_per_pixel = 16;
 609             break;
 610         case FOURCC_I411:
 611         case FOURCC_YV12:
 612         case FOURCC_I420:
 613         case FOURCC_J420:
 614         case FOURCC_IYUV:
 615             p_format->i_bits_per_pixel = 12;
 616             break;
 617         case FOURCC_I410:
 618         case FOURCC_YVU9:
 619             p_format->i_bits_per_pixel = 9;
 620             break;
 621         case FOURCC_Y211:
 622             p_format->i_bits_per_pixel = 8;
 623             break;
 624         case FOURCC_YUVP:
 625             p_format->i_bits_per_pixel = 8;
 626             break;
 627
 628         case FOURCC_RV32:
 629         case FOURCC_RGBA:
 630             p_format->i_bits_per_pixel = 32;
 631             break;
 632         case FOURCC_RV24:
 633             p_format->i_bits_per_pixel = 24;
 634             break;
 635         case FOURCC_RV15:
 636         case FOURCC_RV16:
 637             p_format->i_bits_per_pixel = 16;
 638             break;
 639         case FOURCC_RGB2:
 640             p_format->i_bits_per_pixel = 8;
 641             break;
 642
 643         case FOURCC_GREY:
 644         case FOURCC_Y800:
 645         case FOURCC_Y8:
 646         case FOURCC_RGBP:
 647             p_format->i_bits_per_pixel = 8;
 648             break;
 649
 650         default:
 651             p_format->i_bits_per_pixel = 0;
 652             break;
 653     }
 654 }
 655
 656 /**
 657  * Initialise the picture_t fields given chroma/size.
 658  *
 659  * This function initializes most of the picture_t fields given a chroma and
 660  * size. It makes the assumption that stride == width.
 661  * \param p_this The calling object
 662  * \param p_pic Pointer to the picture to initialize
 663  * \param i_chroma The chroma fourcc to set
 664  * \param i_width The width of the picture
 665  * \param i_height The height of the picture
 666  * \param i_aspect The aspect ratio of the picture
 667  */
 668 int __vout_InitPicture( vlc_object_t *p_this, picture_t *p_pic,
 669                         vlc_fourcc_t i_chroma,
 670                         int i_width, int i_height, int i_aspect )
 671 {
 672     int i_index, i_width_aligned, i_height_aligned;
 673
 674     /* Store default values */
 675     for( i_index = 0; i_index < VOUT_MAX_PLANES; i_index++ )
 676     {
 677         p_pic->p[i_index].p_pixels = NULL;
 678         p_pic->p[i_index].i_pixel_pitch = 1;
 679     }
 680
 681     p_pic->pf_release = NULL;
 682     p_pic->pf_lock = NULL;
 683     p_pic->pf_unlock = NULL;
 684     p_pic->i_refcount = 0;
 685
 686     p_pic->p_q = NULL;
 687     p_pic->i_qstride = 0;
 688     p_pic->i_qtype = 0;
 689
 690     vout_InitFormat( &p_pic->format, i_chroma, i_width, i_height, i_aspect );
 691
 692     /* Make sure the real dimensions are a multiple of 16 */
 693     i_width_aligned = (i_width + 15) >> 4 << 4;
 694     i_height_aligned = (i_height + 15) >> 4 << 4;
 695
 696     /* Calculate coordinates */
 697     switch( i_chroma )
 698     {
 699         case FOURCC_I411:
 700             p_pic->p[ Y_PLANE ].i_lines = i_height_aligned;
 701             p_pic->p[ Y_PLANE ].i_visible_lines = i_height;
 702             p_pic->p[ Y_PLANE ].i_pitch = i_width_aligned;
 703             p_pic->p[ Y_PLANE ].i_visible_pitch = i_width;
 704             p_pic->p[ U_PLANE ].i_lines = i_height_aligned;
 705             p_pic->p[ U_PLANE ].i_visible_lines = i_height;
 706             p_pic->p[ U_PLANE ].i_pitch = i_width_aligned / 4;
 707             p_pic->p[ U_PLANE ].i_visible_pitch = i_width / 4;
 708             p_pic->p[ V_PLANE ].i_lines = i_height_aligned;
 709             p_pic->p[ V_PLANE ].i_visible_lines = i_height;
 710             p_pic->p[ V_PLANE ].i_pitch = i_width_aligned / 4;
 711             p_pic->p[ V_PLANE ].i_visible_pitch = i_width / 4;
 712             p_pic->i_planes = 3;
 713             break;
 714
 715         case FOURCC_I410:
 716         case FOURCC_YVU9:
 717             p_pic->p[ Y_PLANE ].i_lines = i_height_aligned;
 718             p_pic->p[ Y_PLANE ].i_visible_lines = i_height;
 719             p_pic->p[ Y_PLANE ].i_pitch = i_width_aligned;
 720             p_pic->p[ Y_PLANE ].i_visible_pitch = i_width;
 721             p_pic->p[ U_PLANE ].i_lines = i_height_aligned / 4;
 722             p_pic->p[ U_PLANE ].i_visible_lines = i_height / 4;
 723             p_pic->p[ U_PLANE ].i_pitch = i_width_aligned / 4;
 724             p_pic->p[ U_PLANE ].i_visible_pitch = i_width / 4;
 725             p_pic->p[ V_PLANE ].i_lines = i_height_aligned / 4;
 726             p_pic->p[ V_PLANE ].i_visible_lines = i_height / 4;
 727             p_pic->p[ V_PLANE ].i_pitch = i_width_aligned / 4;
 728             p_pic->p[ V_PLANE ].i_visible_pitch = i_width / 4;
 729             p_pic->i_planes = 3;
 730             break;
 731
 732         case FOURCC_YV12:
 733         case FOURCC_I420:
 734         case FOURCC_IYUV:
 735         case FOURCC_J420:
 736             p_pic->p[ Y_PLANE ].i_lines = i_height_aligned;
 737             p_pic->p[ Y_PLANE ].i_visible_lines = i_height;
 738             p_pic->p[ Y_PLANE ].i_pitch = i_width_aligned;
 739             p_pic->p[ Y_PLANE ].i_visible_pitch = i_width;
 740             p_pic->p[ U_PLANE ].i_lines = i_height_aligned / 2;
 741             p_pic->p[ U_PLANE ].i_visible_lines = i_height / 2;
 742             p_pic->p[ U_PLANE ].i_pitch = i_width_aligned / 2;
 743             p_pic->p[ U_PLANE ].i_visible_pitch = i_width / 2;
 744             p_pic->p[ V_PLANE ].i_lines = i_height_aligned / 2;
 745             p_pic->p[ V_PLANE ].i_visible_lines = i_height / 2;
 746             p_pic->p[ V_PLANE ].i_pitch = i_width_aligned / 2;
 747             p_pic->p[ V_PLANE ].i_visible_pitch = i_width / 2;
 748             p_pic->i_planes = 3;
 749             break;
 750
 751         case FOURCC_I422:
 752         case FOURCC_J422:
 753             p_pic->p[ Y_PLANE ].i_lines = i_height_aligned;
 754             p_pic->p[ Y_PLANE ].i_visible_lines = i_height;
 755             p_pic->p[ Y_PLANE ].i_pitch = i_width_aligned;
 756             p_pic->p[ Y_PLANE ].i_visible_pitch = i_width;
 757             p_pic->p[ U_PLANE ].i_lines = i_height_aligned;
 758             p_pic->p[ U_PLANE ].i_visible_lines = i_height;
 759             p_pic->p[ U_PLANE ].i_pitch = i_width_aligned / 2;
 760             p_pic->p[ U_PLANE ].i_visible_pitch = i_width / 2;
 761             p_pic->p[ V_PLANE ].i_lines = i_height_aligned;
 762             p_pic->p[ V_PLANE ].i_visible_lines = i_height;
 763             p_pic->p[ V_PLANE ].i_pitch = i_width_aligned / 2;
 764             p_pic->p[ V_PLANE ].i_visible_pitch = i_width / 2;
 765             p_pic->i_planes = 3;
 766             break;
 767
 768         case FOURCC_I440:
 769         case FOURCC_J440:
 770             p_pic->p[ Y_PLANE ].i_lines = i_height_aligned;
 771             p_pic->p[ Y_PLANE ].i_visible_lines = i_height;
 772             p_pic->p[ Y_PLANE ].i_pitch = i_width_aligned;
 773             p_pic->p[ Y_PLANE ].i_visible_pitch = i_width;
 774             p_pic->p[ U_PLANE ].i_lines = i_height_aligned / 2;
 775             p_pic->p[ U_PLANE ].i_visible_lines = i_height / 2;
 776             p_pic->p[ U_PLANE ].i_pitch = i_width_aligned;
 777             p_pic->p[ U_PLANE ].i_visible_pitch = i_width;
 778             p_pic->p[ V_PLANE ].i_lines = i_height_aligned / 2;
 779             p_pic->p[ V_PLANE ].i_visible_lines = i_height / 2;
 780             p_pic->p[ V_PLANE ].i_pitch = i_width_aligned;
 781             p_pic->p[ V_PLANE ].i_visible_pitch = i_width;
 782             p_pic->i_planes = 3;
 783             break;
 784
 785         case FOURCC_I444:
 786         case FOURCC_J444:
 787             p_pic->p[ Y_PLANE ].i_lines = i_height_aligned;
 788             p_pic->p[ Y_PLANE ].i_visible_lines = i_height;
 789             p_pic->p[ Y_PLANE ].i_pitch = i_width_aligned;
 790             p_pic->p[ Y_PLANE ].i_visible_pitch = i_width;
 791             p_pic->p[ U_PLANE ].i_lines = i_height_aligned;
 792             p_pic->p[ U_PLANE ].i_visible_lines = i_height;
 793             p_pic->p[ U_PLANE ].i_pitch = i_width_aligned;
 794             p_pic->p[ U_PLANE ].i_visible_pitch = i_width;
 795             p_pic->p[ V_PLANE ].i_lines = i_height_aligned;
 796             p_pic->p[ V_PLANE ].i_visible_lines = i_height;
 797             p_pic->p[ V_PLANE ].i_pitch = i_width_aligned;
 798             p_pic->p[ V_PLANE ].i_visible_pitch = i_width;
 799             p_pic->i_planes = 3;
 800             break;
 801
 802         case FOURCC_YUVA:
 803             p_pic->p[ Y_PLANE ].i_lines = i_height_aligned;
 804             p_pic->p[ Y_PLANE ].i_visible_lines = i_height;
 805             p_pic->p[ Y_PLANE ].i_pitch = i_width_aligned;
 806             p_pic->p[ Y_PLANE ].i_visible_pitch = i_width;
 807             p_pic->p[ U_PLANE ].i_lines = i_height_aligned;
 808             p_pic->p[ U_PLANE ].i_visible_lines = i_height;
 809             p_pic->p[ U_PLANE ].i_pitch = i_width_aligned;
 810             p_pic->p[ U_PLANE ].i_visible_pitch = i_width;
 811             p_pic->p[ V_PLANE ].i_lines = i_height_aligned;
 812             p_pic->p[ V_PLANE ].i_visible_lines = i_height;
 813             p_pic->p[ V_PLANE ].i_pitch = i_width_aligned;
 814             p_pic->p[ V_PLANE ].i_visible_pitch = i_width;
 815             p_pic->p[ A_PLANE ].i_lines = i_height_aligned;
 816             p_pic->p[ A_PLANE ].i_visible_lines = i_height;
 817             p_pic->p[ A_PLANE ].i_pitch = i_width_aligned;
 818             p_pic->p[ A_PLANE ].i_visible_pitch = i_width;
 819             p_pic->i_planes = 4;
 820             break;
 821
 822         case FOURCC_YUVP:
 823             p_pic->p->i_lines = i_height_aligned;
 824             p_pic->p->i_visible_lines = i_height;
 825             p_pic->p->i_pitch = i_width_aligned;
 826             p_pic->p->i_visible_pitch = i_width;
 827             p_pic->p->i_pixel_pitch = 8;
 828             p_pic->i_planes = 1;
 829             break;
 830
 831         case FOURCC_Y211:
 832             p_pic->p->i_lines = i_height_aligned;
 833             p_pic->p->i_visible_lines = i_height;
 834             p_pic->p->i_pitch = i_width_aligned;
 835             p_pic->p->i_visible_pitch = i_width;
 836             p_pic->p->i_pixel_pitch = 4;
 837             p_pic->i_planes = 1;
 838             break;
 839
 840         case FOURCC_UYVY:
 841         case FOURCC_YUY2:
 842             p_pic->p->i_lines = i_height_aligned;
 843             p_pic->p->i_visible_lines = i_height;
 844             p_pic->p->i_pitch = i_width_aligned * 2;
 845             p_pic->p->i_visible_pitch = i_width * 2;
 846             p_pic->p->i_pixel_pitch = 4;
 847             p_pic->i_planes = 1;
 848             break;
 849
 850         case FOURCC_RGB2:
 851             p_pic->p->i_lines = i_height_aligned;
 852             p_pic->p->i_visible_lines = i_height;
 853             p_pic->p->i_pitch = i_width_aligned;
 854             p_pic->p->i_visible_pitch = i_width;
 855             p_pic->p->i_pixel_pitch = 1;
 856             p_pic->i_planes = 1;
 857             break;
 858
 859         case FOURCC_RV15:
 860             p_pic->p->i_lines = i_height_aligned;
 861             p_pic->p->i_visible_lines = i_height;
 862             p_pic->p->i_pitch = i_width_aligned * 2;
 863             p_pic->p->i_visible_pitch = i_width * 2;
 864             p_pic->p->i_pixel_pitch = 2;
 865             p_pic->i_planes = 1;
 866             break;
 867
 868         case FOURCC_RV16:
 869             p_pic->p->i_lines = i_height_aligned;
 870             p_pic->p->i_visible_lines = i_height;
 871             p_pic->p->i_pitch = i_width_aligned * 2;
 872             p_pic->p->i_visible_pitch = i_width * 2;
 873             p_pic->p->i_pixel_pitch = 2;
 874             p_pic->i_planes = 1;
 875             break;
 876
 877         case FOURCC_RV24:
 878             p_pic->p->i_lines = i_height_aligned;
 879             p_pic->p->i_visible_lines = i_height;
 880             p_pic->p->i_pitch = i_width_aligned * 3;
 881             p_pic->p->i_visible_pitch = i_width * 3;
 882             p_pic->p->i_pixel_pitch = 3;
 883             p_pic->i_planes = 1;
 884             break;
 885
 886         case FOURCC_RV32:
 887         case FOURCC_RGBA:
 888             p_pic->p->i_lines = i_height_aligned;
 889             p_pic->p->i_visible_lines = i_height;
 890             p_pic->p->i_pitch = i_width_aligned * 4;
 891             p_pic->p->i_visible_pitch = i_width * 4;
 892             p_pic->p->i_pixel_pitch = 4;
 893             p_pic->i_planes = 1;
 894             break;
 895
 896         case FOURCC_GREY:
 897         case FOURCC_Y800:
 898         case FOURCC_Y8:
 899         case FOURCC_RGBP:
 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;
 903             p_pic->p->i_visible_pitch = i_width;
 904             p_pic->p->i_pixel_pitch = 1;
 905             p_pic->i_planes = 1;
 906             break;
 907
 908         default:
 909             if( p_this )
 910                 msg_Err( p_this, "unknown chroma type 0x%.8x (%4.4s)",
 911                                  i_chroma, (char*)&i_chroma );
 912             p_pic->i_planes = 0;
 913             return VLC_EGENERIC;
 914     }
 915
 916     return VLC_SUCCESS;
 917 }
 918
 919 /**
 920  * Compare two chroma values
 921  *
 922  * This function returns 1 if the two fourcc values given as argument are
 923  * the same format (eg. UYVY/UYNV) or almost the same format (eg. I420/YV12)
 924  */
 925 int vout_ChromaCmp( vlc_fourcc_t i_chroma, vlc_fourcc_t i_amorhc )
 926 {
 927     /* If they are the same, they are the same ! */
 928     if( i_chroma == i_amorhc )
 929     {
 930         return 1;
 931     }
 932
 933     /* Check for equivalence classes */
 934     switch( i_chroma )
 935     {
 936         case FOURCC_I420:
 937         case FOURCC_IYUV:
 938         case FOURCC_YV12:
 939             switch( i_amorhc )
 940             {
 941                 case FOURCC_I420:
 942                 case FOURCC_IYUV:
 943                 case FOURCC_YV12:
 944                     return 1;
 945
 946                 default:
 947                     return 0;
 948             }
 949
 950         case FOURCC_UYVY:
 951         case FOURCC_UYNV:
 952         case FOURCC_Y422:
 953             switch( i_amorhc )
 954             {
 955                 case FOURCC_UYVY:
 956                 case FOURCC_UYNV:
 957                 case FOURCC_Y422:
 958                     return 1;
 959
 960                 default:
 961                     return 0;
 962             }
 963
 964         case FOURCC_YUY2:
 965         case FOURCC_YUNV:
 966             switch( i_amorhc )
 967             {
 968                 case FOURCC_YUY2:
 969                 case FOURCC_YUNV:
 970                     return 1;
 971
 972                 default:
 973                     return 0;
 974             }
 975
 976         case FOURCC_GREY:
 977         case FOURCC_Y800:
 978         case FOURCC_Y8:
 979             switch( i_amorhc )
 980             {
 981                 case FOURCC_GREY:
 982                 case FOURCC_Y800:
 983                 case FOURCC_Y8:
 984                     return 1;
 985
 986                 default:
 987                     return 0;
 988             }
 989
 990         default:
 991             return 0;
 992     }
 993 }
 994
 995 /*****************************************************************************
 996  *
 997  *****************************************************************************/
 998 static void PictureReleaseCallback( picture_t *p_picture )
 999 {
1000     if( --p_picture->i_refcount > 0 )
1001         return;
1002     picture_Delete( p_picture );
1003 }
1004 /*****************************************************************************
1005  *
1006  *****************************************************************************/
1007 picture_t *picture_New( vlc_fourcc_t i_chroma, int i_width, int i_height, int i_aspect )
1008 {
1009     picture_t *p_picture = malloc( sizeof(*p_picture) );
1010
1011     if( !p_picture )
1012         return NULL;
1013
1014     memset( p_picture, 0, sizeof(*p_picture) );
1015     if( __vout_AllocatePicture( NULL, p_picture,
1016                                 i_chroma, i_width, i_height, i_aspect ) )
1017     {
1018         free( p_picture );
1019         return NULL;
1020     }
1021
1022     p_picture->i_refcount = 1;
1023     p_picture->pf_release = PictureReleaseCallback;
1024     p_picture->i_status = RESERVED_PICTURE;
1025
1026     return p_picture;
1027 }
1028
1029 /*****************************************************************************
1030  *
1031  *****************************************************************************/
1032 void picture_Delete( picture_t *p_picture )
1033 {
1034     assert( p_picture && p_picture->i_refcount == 0 );
1035
1036     free( p_picture->p_q );
1037     free( p_picture->p_data_orig );
1038     free( p_picture->p_sys );
1039     free( p_picture );
1040 }
1041
1042 /*****************************************************************************
1043  *
1044  *****************************************************************************/
1045 void picture_CopyPixels( picture_t *p_dst, const picture_t *p_src )
1046 {
1047     int i;
1048
1049     for( i = 0; i < p_src->i_planes ; i++ )
1050         plane_CopyPixels( p_dst->p+i, p_src->p+i );
1051 }
1052
1053 void plane_CopyPixels( plane_t *p_dst, const plane_t *p_src )
1054 {
1055     const unsigned i_width  = __MIN( p_dst->i_visible_pitch,
1056                                      p_src->i_visible_pitch );
1057     const unsigned i_height = __MIN( p_dst->i_visible_lines,
1058                                      p_src->i_visible_lines );
1059
1060     if( p_src->i_pitch == p_dst->i_pitch )
1061     {
1062         /* There are margins, but with the same width : perfect ! */
1063         vlc_memcpy( p_dst->p_pixels, p_src->p_pixels,
1064                     p_src->i_pitch * i_height );
1065     }
1066     else
1067     {
1068         /* We need to proceed line by line */
1069         uint8_t *p_in = p_src->p_pixels;
1070         uint8_t *p_out = p_dst->p_pixels;
1071         int i_line;
1072
1073         assert( p_in );
1074         assert( p_out );
1075
1076         for( i_line = i_height; i_line--; )
1077         {
1078             vlc_memcpy( p_out, p_in, i_width );
1079             p_in += p_src->i_pitch;
1080             p_out += p_dst->i_pitch;
1081         }
1082     }
1083 }
1084
1085 /*****************************************************************************
1086  *
1087  *****************************************************************************/
1088