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 #include <vlc/vlc.h>
  30 #include <vlc_vout.h>
  31 #include <vlc_osd.h>
  32 #include "vout_pictures.h"
  33
  34 /**
  35  * Display a picture
  36  *
  37  * Remove the reservation flag of a picture, which will cause it to be ready
  38  * for display. The picture won't be displayed until vout_DatePicture has been
  39  * called.
  40  */
  41 void vout_DisplayPicture( vout_thread_t *p_vout, picture_t *p_pic )
  42 {
  43     vlc_mutex_lock( &p_vout->picture_lock );
  44     switch( p_pic->i_status )
  45     {
  46     case RESERVED_PICTURE:
  47         p_pic->i_status = RESERVED_DISP_PICTURE;
  48         break;
  49     case RESERVED_DATED_PICTURE:
  50         p_pic->i_status = READY_PICTURE;
  51         break;
  52     default:
  53         msg_Err( p_vout, "picture to display %p has invalid status %d",
  54                          p_pic, p_pic->i_status );
  55         break;
  56     }
  57
  58     vlc_mutex_unlock( &p_vout->picture_lock );
  59 }
  60
  61 /**
  62  * Date a picture
  63  *
  64  * Remove the reservation flag of a picture, which will cause it to be ready
  65  * for display. The picture won't be displayed until vout_DisplayPicture has
  66  * been called.
  67  * \param p_vout The vout in question
  68  * \param p_pic The picture to date
  69  * \param date The date to display the picture
  70  */
  71 void vout_DatePicture( vout_thread_t *p_vout,
  72                        picture_t *p_pic, mtime_t date )
  73 {
  74     vlc_mutex_lock( &p_vout->picture_lock );
  75     p_pic->date = date;
  76     switch( p_pic->i_status )
  77     {
  78     case RESERVED_PICTURE:
  79         p_pic->i_status = RESERVED_DATED_PICTURE;
  80         break;
  81     case RESERVED_DISP_PICTURE:
  82         p_pic->i_status = READY_PICTURE;
  83         break;
  84     default:
  85         msg_Err( p_vout, "picture to date %p has invalid status %d",
  86                          p_pic, p_pic->i_status );
  87         break;
  88     }
  89
  90     vlc_mutex_unlock( &p_vout->picture_lock );
  91 }
  92
  93 /**
  94  * Allocate a picture in the video output heap.
  95  *
  96  * This function creates a reserved image in the video output heap.
  97  * A null pointer is returned if the function fails. This method provides an
  98  * already allocated zone of memory in the picture data fields.
  99  * It needs locking since several pictures can be created by several producers
 100  * threads.
 101  */
 102 picture_t *vout_CreatePicture( vout_thread_t *p_vout,
 103                                vlc_bool_t b_progressive,
 104                                vlc_bool_t b_top_field_first,
 105                                unsigned int i_nb_fields )
 106 {
 107     int         i_pic;                                      /* picture index */
 108     picture_t * p_pic;
 109     picture_t * p_freepic = NULL;                      /* first free picture */
 110
 111     /* Get lock */
 112     vlc_mutex_lock( &p_vout->picture_lock );
 113
 114     /*
 115      * Look for an empty place in the picture heap.
 116      */
 117     for( i_pic = 0; i_pic < I_RENDERPICTURES; i_pic++ )
 118     {
 119         p_pic = PP_RENDERPICTURE[(p_vout->render.i_last_used_pic + i_pic + 1)
 120                                  % I_RENDERPICTURES];
 121
 122         switch( p_pic->i_status )
 123         {
 124             case DESTROYED_PICTURE:
 125                 /* Memory will not be reallocated, and function can end
 126                  * immediately - this is the best possible case, since no
 127                  * memory allocation needs to be done */
 128                 p_pic->i_status   = RESERVED_PICTURE;
 129                 p_pic->i_refcount = 0;
 130                 p_pic->b_force    = 0;
 131
 132                 p_pic->b_progressive        = b_progressive;
 133                 p_pic->i_nb_fields          = i_nb_fields;
 134                 p_pic->b_top_field_first    = b_top_field_first;
 135
 136                 p_vout->i_heap_size++;
 137                 p_vout->render.i_last_used_pic =
 138                     ( p_vout->render.i_last_used_pic + i_pic + 1 )
 139                     % I_RENDERPICTURES;
 140                 vlc_mutex_unlock( &p_vout->picture_lock );
 141                 return( p_pic );
 142
 143             case FREE_PICTURE:
 144                 /* Picture is empty and ready for allocation */
 145                 p_vout->render.i_last_used_pic =
 146                     ( p_vout->render.i_last_used_pic + i_pic + 1 )
 147                     % I_RENDERPICTURES;
 148                 p_freepic = p_pic;
 149                 break;
 150
 151             default:
 152                 break;
 153         }
 154     }
 155
 156     /*
 157      * Prepare picture
 158      */
 159     if( p_freepic != NULL )
 160     {
 161         vout_AllocatePicture( VLC_OBJECT(p_vout),
 162                               p_freepic, p_vout->render.i_chroma,
 163                               p_vout->render.i_width, p_vout->render.i_height,
 164                               p_vout->render.i_aspect );
 165
 166         if( p_freepic->i_planes )
 167         {
 168             /* Copy picture information, set some default values */
 169             p_freepic->i_status   = RESERVED_PICTURE;
 170             p_freepic->i_type     = MEMORY_PICTURE;
 171             p_freepic->b_slow     = 0;
 172
 173             p_freepic->i_refcount = 0;
 174             p_freepic->b_force = 0;
 175
 176             p_freepic->b_progressive        = b_progressive;
 177             p_freepic->i_nb_fields          = i_nb_fields;
 178             p_freepic->b_top_field_first    = b_top_field_first;
 179
 180             p_freepic->i_matrix_coefficients = 1;
 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  * Remove a permanent or reserved picture from the heap
 207  *
 208  * This function frees a previously reserved picture or a permanent
 209  * picture. It is meant to be used when the construction of a picture aborted.
 210  * Note that the picture will be destroyed even if it is linked !
 211  */
 212 void vout_DestroyPicture( vout_thread_t *p_vout, picture_t *p_pic )
 213 {
 214     vlc_mutex_lock( &p_vout->picture_lock );
 215
 216 #ifdef DEBUG
 217     /* Check if picture status is valid */
 218     if( (p_pic->i_status != RESERVED_PICTURE) &&
 219         (p_pic->i_status != RESERVED_DATED_PICTURE) &&
 220         (p_pic->i_status != RESERVED_DISP_PICTURE) )
 221     {
 222         msg_Err( p_vout, "picture to destroy %p has invalid status %d",
 223                          p_pic, p_pic->i_status );
 224     }
 225 #endif
 226
 227     p_pic->i_status = DESTROYED_PICTURE;
 228     p_vout->i_heap_size--;
 229
 230     vlc_mutex_unlock( &p_vout->picture_lock );
 231 }
 232
 233 /**
 234  * Increment reference counter of a picture
 235  *
 236  * This function increments the reference counter of a picture in the video
 237  * heap. It needs a lock since several producer threads can access the picture.
 238  */
 239 void vout_LinkPicture( vout_thread_t *p_vout, picture_t *p_pic )
 240 {
 241     vlc_mutex_lock( &p_vout->picture_lock );
 242     p_pic->i_refcount++;
 243     vlc_mutex_unlock( &p_vout->picture_lock );
 244 }
 245
 246 /**
 247  * Decrement reference counter of a picture
 248  *
 249  * This function decrement the reference counter of a picture in the video heap
 250  */
 251 void vout_UnlinkPicture( vout_thread_t *p_vout, picture_t *p_pic )
 252 {
 253     vlc_mutex_lock( &p_vout->picture_lock );
 254     p_pic->i_refcount--;
 255
 256     if( ( p_pic->i_refcount == 0 ) &&
 257         ( p_pic->i_status == DISPLAYED_PICTURE ) )
 258     {
 259         p_pic->i_status = DESTROYED_PICTURE;
 260         p_vout->i_heap_size--;
 261     }
 262
 263     vlc_mutex_unlock( &p_vout->picture_lock );
 264 }
 265
 266 /**
 267  * Render a picture
 268  *
 269  * This function chooses whether the current picture needs to be copied
 270  * before rendering, does the subpicture magic, and tells the video output
 271  * thread which direct buffer needs to be displayed.
 272  */
 273 picture_t * vout_RenderPicture( vout_thread_t *p_vout, picture_t *p_pic,
 274                                                        subpicture_t *p_subpic )
 275 {
 276     int i_scale_width, i_scale_height;
 277
 278     if( p_pic == NULL )
 279     {
 280         /* XXX: subtitles */
 281         return NULL;
 282     }
 283
 284     i_scale_width = p_vout->fmt_out.i_visible_width * 1000 /
 285         p_vout->fmt_in.i_visible_width;
 286     i_scale_height = p_vout->fmt_out.i_visible_height * 1000 /
 287         p_vout->fmt_in.i_visible_height;
 288
 289     if( p_pic->i_type == DIRECT_PICTURE )
 290     {
 291         if( !p_vout->render.b_allow_modify_pics || p_pic->i_refcount ||
 292             p_pic->b_force )
 293         {
 294             /* Picture is in a direct buffer and is still in use,
 295              * we need to copy it to another direct buffer before
 296              * displaying it if there are subtitles. */
 297             if( p_subpic != NULL )
 298             {
 299                 /* We have subtitles. First copy the picture to
 300                  * the spare direct buffer, then render the
 301                  * subtitles. */
 302                 vout_CopyPicture( p_vout, PP_OUTPUTPICTURE[0], p_pic );
 303
 304                 spu_RenderSubpictures( p_vout->p_spu, &p_vout->fmt_out,
 305                                        PP_OUTPUTPICTURE[0], p_pic, p_subpic,
 306                                        i_scale_width, i_scale_height );
 307
 308                 return PP_OUTPUTPICTURE[0];
 309             }
 310
 311             /* No subtitles, picture is in a directbuffer so
 312              * we can display it directly even if it is still
 313              * in use. */
 314             return p_pic;
 315         }
 316
 317         /* Picture is in a direct buffer but isn't used by the
 318          * decoder. We can safely render subtitles on it and
 319          * display it. */
 320         spu_RenderSubpictures( p_vout->p_spu, &p_vout->fmt_out, p_pic, p_pic,
 321                                p_subpic, i_scale_width, i_scale_height );
 322
 323         return p_pic;
 324     }
 325
 326     /* Not a direct buffer. We either need to copy it to a direct buffer,
 327      * or render it if the chroma isn't the same. */
 328     if( p_vout->b_direct )
 329     {
 330         /* Picture is not in a direct buffer, but is exactly the
 331          * same size as the direct buffers. A memcpy() is enough,
 332          * then render the subtitles. */
 333
 334         if( PP_OUTPUTPICTURE[0]->pf_lock )
 335             if( PP_OUTPUTPICTURE[0]->pf_lock( p_vout, PP_OUTPUTPICTURE[0] ) )
 336                 return NULL;
 337
 338         vout_CopyPicture( p_vout, PP_OUTPUTPICTURE[0], p_pic );
 339         spu_RenderSubpictures( p_vout->p_spu, &p_vout->fmt_out,
 340                                PP_OUTPUTPICTURE[0], p_pic,
 341                                p_subpic, i_scale_width, i_scale_height );
 342
 343         if( PP_OUTPUTPICTURE[0]->pf_unlock )
 344             PP_OUTPUTPICTURE[0]->pf_unlock( p_vout, PP_OUTPUTPICTURE[0] );
 345
 346         return PP_OUTPUTPICTURE[0];
 347     }
 348
 349     /* Picture is not in a direct buffer, and needs to be converted to
 350      * another size/chroma. Then the subtitles need to be rendered as
 351      * well. This usually means software YUV, or hardware YUV with a
 352      * different chroma. */
 353
 354     if( p_subpic != NULL && p_vout->p_picture[0].b_slow )
 355     {
 356         /* The picture buffer is in slow memory. We'll use
 357          * the "2 * VOUT_MAX_PICTURES + 1" picture as a temporary
 358          * one for subpictures rendering. */
 359         picture_t *p_tmp_pic = &p_vout->p_picture[2 * VOUT_MAX_PICTURES];
 360         if( p_tmp_pic->i_status == FREE_PICTURE )
 361         {
 362             vout_AllocatePicture( VLC_OBJECT(p_vout),
 363                                   p_tmp_pic, p_vout->fmt_out.i_chroma,
 364                                   p_vout->fmt_out.i_width,
 365                                   p_vout->fmt_out.i_height,
 366                                   p_vout->fmt_out.i_aspect );
 367             p_tmp_pic->i_type = MEMORY_PICTURE;
 368             p_tmp_pic->i_status = RESERVED_PICTURE;
 369             /* some modules (such as blend)  needs to know the extra information in picture heap */
 370             p_tmp_pic->p_heap = &p_vout->output;
 371         }
 372
 373         /* Convert image to the first direct buffer */
 374         p_vout->chroma.pf_convert( p_vout, p_pic, p_tmp_pic );
 375
 376         /* Render subpictures on the first direct buffer */
 377         spu_RenderSubpictures( p_vout->p_spu, &p_vout->fmt_out, p_tmp_pic,
 378                                p_tmp_pic, p_subpic,
 379                                i_scale_width, i_scale_height );
 380
 381         if( p_vout->p_picture[0].pf_lock )
 382             if( p_vout->p_picture[0].pf_lock( p_vout, &p_vout->p_picture[0] ) )
 383                 return NULL;
 384
 385         vout_CopyPicture( p_vout, &p_vout->p_picture[0], p_tmp_pic );
 386     }
 387     else
 388     {
 389         if( p_vout->p_picture[0].pf_lock )
 390             if( p_vout->p_picture[0].pf_lock( p_vout, &p_vout->p_picture[0] ) )
 391                 return NULL;
 392
 393         /* Convert image to the first direct buffer */
 394         p_vout->chroma.pf_convert( p_vout, p_pic, &p_vout->p_picture[0] );
 395
 396         /* Render subpictures on the first direct buffer */
 397         spu_RenderSubpictures( p_vout->p_spu, &p_vout->fmt_out,
 398                                &p_vout->p_picture[0], &p_vout->p_picture[0],
 399                                p_subpic, i_scale_width, i_scale_height );
 400     }
 401
 402     if( p_vout->p_picture[0].pf_unlock )
 403         p_vout->p_picture[0].pf_unlock( p_vout, &p_vout->p_picture[0] );
 404
 405     return &p_vout->p_picture[0];
 406 }
 407
 408 /**
 409  * Calculate image window coordinates
 410  *
 411  * This function will be accessed by plugins. It calculates the relative
 412  * position of the output window and the image window.
 413  */
 414 void vout_PlacePicture( vout_thread_t *p_vout,
 415                         unsigned int i_width, unsigned int i_height,
 416                         unsigned int *pi_x, unsigned int *pi_y,
 417                         unsigned int *pi_width, unsigned int *pi_height )
 418 {
 419     if( (i_width <= 0) || (i_height <=0) )
 420     {
 421         *pi_width = *pi_height = *pi_x = *pi_y = 0;
 422         return;
 423     }
 424
 425     if( p_vout->b_scale )
 426     {
 427         *pi_width = i_width;
 428         *pi_height = i_height;
 429     }
 430     else
 431     {
 432         *pi_width = __MIN( i_width, p_vout->fmt_in.i_visible_width );
 433         *pi_height = __MIN( i_height, p_vout->fmt_in.i_visible_height );
 434     }
 435
 436     if( p_vout->fmt_in.i_visible_width * (int64_t)p_vout->fmt_in.i_sar_num *
 437         *pi_height / p_vout->fmt_in.i_visible_height /
 438         p_vout->fmt_in.i_sar_den > *pi_width )
 439     {
 440         *pi_height = p_vout->fmt_in.i_visible_height *
 441             (int64_t)p_vout->fmt_in.i_sar_den * *pi_width /
 442             p_vout->fmt_in.i_visible_width / p_vout->fmt_in.i_sar_num;
 443     }
 444     else
 445     {
 446         *pi_width = p_vout->fmt_in.i_visible_width *
 447             (int64_t)p_vout->fmt_in.i_sar_num * *pi_height /
 448             p_vout->fmt_in.i_visible_height / p_vout->fmt_in.i_sar_den;
 449     }
 450
 451     switch( p_vout->i_alignment & VOUT_ALIGN_HMASK )
 452     {
 453     case VOUT_ALIGN_LEFT:
 454         *pi_x = 0;
 455         break;
 456     case VOUT_ALIGN_RIGHT:
 457         *pi_x = i_width - *pi_width;
 458         break;
 459     default:
 460         *pi_x = ( i_width - *pi_width ) / 2;
 461     }
 462
 463     switch( p_vout->i_alignment & VOUT_ALIGN_VMASK )
 464     {
 465     case VOUT_ALIGN_TOP:
 466         *pi_y = 0;
 467         break;
 468     case VOUT_ALIGN_BOTTOM:
 469         *pi_y = i_height - *pi_height;
 470         break;
 471     default:
 472         *pi_y = ( i_height - *pi_height ) / 2;
 473     }
 474 }
 475
 476 /**
 477  * Allocate a new picture in the heap.
 478  *
 479  * This function allocates a fake direct buffer in memory, which can be
 480  * used exactly like a video buffer. The video output thread then manages
 481  * how it gets displayed.
 482  */
 483 int __vout_AllocatePicture( vlc_object_t *p_this, picture_t *p_pic,
 484                             vlc_fourcc_t i_chroma,
 485                             int i_width, int i_height, int i_aspect )
 486 {
 487     int i_bytes, i_index, i_width_aligned, i_height_aligned;
 488
 489     /* Make sure the real dimensions are a multiple of 16 */
 490     i_width_aligned = (i_width + 15) >> 4 << 4;
 491     i_height_aligned = (i_height + 15) >> 4 << 4;
 492
 493     if( vout_InitPicture( p_this, p_pic, i_chroma,
 494                           i_width, i_height, i_aspect ) != VLC_SUCCESS )
 495     {
 496         p_pic->i_planes = 0;
 497         return VLC_EGENERIC;
 498     }
 499
 500     /* Calculate how big the new image should be */
 501     i_bytes = p_pic->format.i_bits_per_pixel *
 502         i_width_aligned * i_height_aligned / 8;
 503
 504     p_pic->p_data = vlc_memalign( &p_pic->p_data_orig, 16, i_bytes );
 505
 506     if( p_pic->p_data == NULL )
 507     {
 508         p_pic->i_planes = 0;
 509         return VLC_EGENERIC;
 510     }
 511
 512     /* Fill the p_pixels field for each plane */
 513     p_pic->p[ 0 ].p_pixels = p_pic->p_data;
 514
 515     for( i_index = 1; i_index < p_pic->i_planes; i_index++ )
 516     {
 517         p_pic->p[i_index].p_pixels = p_pic->p[i_index-1].p_pixels +
 518             p_pic->p[i_index-1].i_lines * p_pic->p[i_index-1].i_pitch;
 519     }
 520
 521     return VLC_SUCCESS;
 522 }
 523
 524 /**
 525  * Initialise the video format fields given chroma/size.
 526  *
 527  * This function initializes all the video_frame_format_t fields given the
 528  * static properties of a picture (chroma and size).
 529  * \param p_format Pointer to the format structure to initialize
 530  * \param i_chroma Chroma to set
 531  * \param i_width Width to set
 532  * \param i_height Height to set
 533  * \param i_aspect Aspect ratio
 534  */
 535 void vout_InitFormat( video_frame_format_t *p_format, vlc_fourcc_t i_chroma,
 536                       int i_width, int i_height, int i_aspect )
 537 {
 538     p_format->i_chroma   = i_chroma;
 539     p_format->i_width    = p_format->i_visible_width  = i_width;
 540     p_format->i_height   = p_format->i_visible_height = i_height;
 541     p_format->i_x_offset = p_format->i_y_offset = 0;
 542     p_format->i_aspect   = i_aspect;
 543
 544 #if 0
 545     /* Assume we have square pixels */
 546     if( i_width && i_height )
 547         p_format->i_aspect = i_width * VOUT_ASPECT_FACTOR / i_height;
 548     else
 549         p_format->i_aspect = 0;
 550 #endif
 551
 552     switch( i_chroma )
 553     {
 554         case FOURCC_YUVA:
 555             p_format->i_bits_per_pixel = 32;
 556             break;
 557         case FOURCC_I444:
 558         case FOURCC_J444:
 559             p_format->i_bits_per_pixel = 24;
 560             break;
 561         case FOURCC_I422:
 562         case FOURCC_YUY2:
 563         case FOURCC_UYVY:
 564         case FOURCC_J422:
 565             p_format->i_bits_per_pixel = 16;
 566             break;
 567         case FOURCC_I411:
 568         case FOURCC_YV12:
 569         case FOURCC_I420:
 570         case FOURCC_J420:
 571         case FOURCC_IYUV:
 572             p_format->i_bits_per_pixel = 12;
 573             break;
 574         case FOURCC_I410:
 575         case FOURCC_YVU9:
 576             p_format->i_bits_per_pixel = 9;
 577             break;
 578         case FOURCC_Y211:
 579             p_format->i_bits_per_pixel = 8;
 580             break;
 581         case FOURCC_YUVP:
 582             p_format->i_bits_per_pixel = 8;
 583             break;
 584
 585         case FOURCC_RV32:
 586         case FOURCC_RGBA:
 587             p_format->i_bits_per_pixel = 32;
 588             break;
 589         case FOURCC_RV24:
 590             p_format->i_bits_per_pixel = 24;
 591             break;
 592         case FOURCC_RV15:
 593         case FOURCC_RV16:
 594             p_format->i_bits_per_pixel = 16;
 595             break;
 596         case FOURCC_RGB2:
 597             p_format->i_bits_per_pixel = 8;
 598             break;
 599
 600         case FOURCC_GREY:
 601             p_format->i_bits_per_pixel = 8;
 602             break;
 603
 604         default:
 605             p_format->i_bits_per_pixel = 0;
 606             break;
 607     }
 608 }
 609
 610 /**
 611  * Initialise the picture_t fields given chroma/size.
 612  *
 613  * This function initializes most of the picture_t fields given a chroma and
 614  * size. It makes the assumption that stride == width.
 615  * \param p_this The calling object
 616  * \param p_pic Pointer to the picture to initialize
 617  * \param i_chroma The chroma fourcc to set
 618  * \param i_width The width of the picture
 619  * \param i_height The height of the picture
 620  * \param i_aspect The aspect ratio of the picture
 621  */
 622 int __vout_InitPicture( vlc_object_t *p_this, picture_t *p_pic,
 623                         vlc_fourcc_t i_chroma,
 624                         int i_width, int i_height, int i_aspect )
 625 {
 626     int i_index, i_width_aligned, i_height_aligned;
 627
 628     /* Store default values */
 629     for( i_index = 0; i_index < VOUT_MAX_PLANES; i_index++ )
 630     {
 631         p_pic->p[i_index].p_pixels = NULL;
 632         p_pic->p[i_index].i_pixel_pitch = 1;
 633     }
 634
 635     p_pic->pf_release = 0;
 636     p_pic->pf_lock = 0;
 637     p_pic->pf_unlock = 0;
 638     p_pic->i_refcount = 0;
 639
 640     vout_InitFormat( &p_pic->format, i_chroma, i_width, i_height, i_aspect );
 641
 642     /* Make sure the real dimensions are a multiple of 16 */
 643     i_width_aligned = (i_width + 15) >> 4 << 4;
 644     i_height_aligned = (i_height + 15) >> 4 << 4;
 645
 646     /* Calculate coordinates */
 647     switch( i_chroma )
 648     {
 649         case FOURCC_I411:
 650             p_pic->p[ Y_PLANE ].i_lines = i_height_aligned;
 651             p_pic->p[ Y_PLANE ].i_visible_lines = i_height;
 652             p_pic->p[ Y_PLANE ].i_pitch = i_width_aligned;
 653             p_pic->p[ Y_PLANE ].i_visible_pitch = i_width;
 654             p_pic->p[ U_PLANE ].i_lines = i_height_aligned;
 655             p_pic->p[ U_PLANE ].i_visible_lines = i_height;
 656             p_pic->p[ U_PLANE ].i_pitch = i_width_aligned / 4;
 657             p_pic->p[ U_PLANE ].i_visible_pitch = i_width / 4;
 658             p_pic->p[ V_PLANE ].i_lines = i_height_aligned;
 659             p_pic->p[ V_PLANE ].i_visible_lines = i_height;
 660             p_pic->p[ V_PLANE ].i_pitch = i_width_aligned / 4;
 661             p_pic->p[ V_PLANE ].i_visible_pitch = i_width / 4;
 662             p_pic->i_planes = 3;
 663             break;
 664
 665         case FOURCC_I410:
 666         case FOURCC_YVU9:
 667             p_pic->p[ Y_PLANE ].i_lines = i_height_aligned;
 668             p_pic->p[ Y_PLANE ].i_visible_lines = i_height;
 669             p_pic->p[ Y_PLANE ].i_pitch = i_width_aligned;
 670             p_pic->p[ Y_PLANE ].i_visible_pitch = i_width;
 671             p_pic->p[ U_PLANE ].i_lines = i_height_aligned / 4;
 672             p_pic->p[ U_PLANE ].i_visible_lines = i_height / 4;
 673             p_pic->p[ U_PLANE ].i_pitch = i_width_aligned / 4;
 674             p_pic->p[ U_PLANE ].i_visible_pitch = i_width / 4;
 675             p_pic->p[ V_PLANE ].i_lines = i_height_aligned / 4;
 676             p_pic->p[ V_PLANE ].i_visible_lines = i_height / 4;
 677             p_pic->p[ V_PLANE ].i_pitch = i_width_aligned / 4;
 678             p_pic->p[ V_PLANE ].i_visible_pitch = i_width / 4;
 679             p_pic->i_planes = 3;
 680             break;
 681
 682         case FOURCC_YV12:
 683         case FOURCC_I420:
 684         case FOURCC_IYUV:
 685         case FOURCC_J420:
 686             p_pic->p[ Y_PLANE ].i_lines = i_height_aligned;
 687             p_pic->p[ Y_PLANE ].i_visible_lines = i_height;
 688             p_pic->p[ Y_PLANE ].i_pitch = i_width_aligned;
 689             p_pic->p[ Y_PLANE ].i_visible_pitch = i_width;
 690             p_pic->p[ U_PLANE ].i_lines = i_height_aligned / 2;
 691             p_pic->p[ U_PLANE ].i_visible_lines = i_height / 2;
 692             p_pic->p[ U_PLANE ].i_pitch = i_width_aligned / 2;
 693             p_pic->p[ U_PLANE ].i_visible_pitch = i_width / 2;
 694             p_pic->p[ V_PLANE ].i_lines = i_height_aligned / 2;
 695             p_pic->p[ V_PLANE ].i_visible_lines = i_height / 2;
 696             p_pic->p[ V_PLANE ].i_pitch = i_width_aligned / 2;
 697             p_pic->p[ V_PLANE ].i_visible_pitch = i_width / 2;
 698             p_pic->i_planes = 3;
 699             break;
 700
 701         case FOURCC_I422:
 702         case FOURCC_J422:
 703             p_pic->p[ Y_PLANE ].i_lines = i_height_aligned;
 704             p_pic->p[ Y_PLANE ].i_visible_lines = i_height;
 705             p_pic->p[ Y_PLANE ].i_pitch = i_width_aligned;
 706             p_pic->p[ Y_PLANE ].i_visible_pitch = i_width;
 707             p_pic->p[ U_PLANE ].i_lines = i_height_aligned;
 708             p_pic->p[ U_PLANE ].i_visible_lines = i_height;
 709             p_pic->p[ U_PLANE ].i_pitch = i_width_aligned / 2;
 710             p_pic->p[ U_PLANE ].i_visible_pitch = i_width / 2;
 711             p_pic->p[ V_PLANE ].i_lines = i_height_aligned;
 712             p_pic->p[ V_PLANE ].i_visible_lines = i_height;
 713             p_pic->p[ V_PLANE ].i_pitch = i_width_aligned / 2;
 714             p_pic->p[ V_PLANE ].i_visible_pitch = i_width / 2;
 715             p_pic->i_planes = 3;
 716             break;
 717
 718         case FOURCC_I444:
 719         case FOURCC_J444:
 720             p_pic->p[ Y_PLANE ].i_lines = i_height_aligned;
 721             p_pic->p[ Y_PLANE ].i_visible_lines = i_height;
 722             p_pic->p[ Y_PLANE ].i_pitch = i_width_aligned;
 723             p_pic->p[ Y_PLANE ].i_visible_pitch = i_width;
 724             p_pic->p[ U_PLANE ].i_lines = i_height_aligned;
 725             p_pic->p[ U_PLANE ].i_visible_lines = i_height;
 726             p_pic->p[ U_PLANE ].i_pitch = i_width_aligned;
 727             p_pic->p[ U_PLANE ].i_visible_pitch = i_width;
 728             p_pic->p[ V_PLANE ].i_lines = i_height_aligned;
 729             p_pic->p[ V_PLANE ].i_visible_lines = i_height;
 730             p_pic->p[ V_PLANE ].i_pitch = i_width_aligned;
 731             p_pic->p[ V_PLANE ].i_visible_pitch = i_width;
 732             p_pic->i_planes = 3;
 733             break;
 734
 735         case FOURCC_YUVA:
 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;
 741             p_pic->p[ U_PLANE ].i_visible_lines = i_height;
 742             p_pic->p[ U_PLANE ].i_pitch = i_width_aligned;
 743             p_pic->p[ U_PLANE ].i_visible_pitch = i_width;
 744             p_pic->p[ V_PLANE ].i_lines = i_height_aligned;
 745             p_pic->p[ V_PLANE ].i_visible_lines = i_height;
 746             p_pic->p[ V_PLANE ].i_pitch = i_width_aligned;
 747             p_pic->p[ V_PLANE ].i_visible_pitch = i_width;
 748             p_pic->p[ A_PLANE ].i_lines = i_height_aligned;
 749             p_pic->p[ A_PLANE ].i_visible_lines = i_height;
 750             p_pic->p[ A_PLANE ].i_pitch = i_width_aligned;
 751             p_pic->p[ A_PLANE ].i_visible_pitch = i_width;
 752             p_pic->i_planes = 4;
 753             break;
 754
 755         case FOURCC_YUVP:
 756             p_pic->p->i_lines = i_height_aligned;
 757             p_pic->p->i_visible_lines = i_height;
 758             p_pic->p->i_pitch = i_width_aligned;
 759             p_pic->p->i_visible_pitch = i_width;
 760             p_pic->p->i_pixel_pitch = 8;
 761             p_pic->i_planes = 1;
 762             break;
 763
 764         case FOURCC_Y211:
 765             p_pic->p->i_lines = i_height_aligned;
 766             p_pic->p->i_visible_lines = i_height;
 767             p_pic->p->i_pitch = i_width_aligned;
 768             p_pic->p->i_visible_pitch = i_width;
 769             p_pic->p->i_pixel_pitch = 4;
 770             p_pic->i_planes = 1;
 771             break;
 772
 773         case FOURCC_UYVY:
 774         case FOURCC_YUY2:
 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 * 2;
 778             p_pic->p->i_visible_pitch = i_width * 2;
 779             p_pic->p->i_pixel_pitch = 4;
 780             p_pic->i_planes = 1;
 781             break;
 782
 783         case FOURCC_RGB2:
 784             p_pic->p->i_lines = i_height_aligned;
 785             p_pic->p->i_visible_lines = i_height;
 786             p_pic->p->i_pitch = i_width_aligned;
 787             p_pic->p->i_visible_pitch = i_width;
 788             p_pic->p->i_pixel_pitch = 1;
 789             p_pic->i_planes = 1;
 790             break;
 791
 792         case FOURCC_RV15:
 793             p_pic->p->i_lines = i_height_aligned;
 794             p_pic->p->i_visible_lines = i_height;
 795             p_pic->p->i_pitch = i_width_aligned * 2;
 796             p_pic->p->i_visible_pitch = i_width * 2;
 797             p_pic->p->i_pixel_pitch = 2;
 798             p_pic->i_planes = 1;
 799             break;
 800
 801         case FOURCC_RV16:
 802             p_pic->p->i_lines = i_height_aligned;
 803             p_pic->p->i_visible_lines = i_height;
 804             p_pic->p->i_pitch = i_width_aligned * 2;
 805             p_pic->p->i_visible_pitch = i_width * 2;
 806             p_pic->p->i_pixel_pitch = 2;
 807             p_pic->i_planes = 1;
 808             break;
 809
 810         case FOURCC_RV24:
 811             p_pic->p->i_lines = i_height_aligned;
 812             p_pic->p->i_visible_lines = i_height;
 813             p_pic->p->i_pitch = i_width_aligned * 3;
 814             p_pic->p->i_visible_pitch = i_width * 3;
 815             p_pic->p->i_pixel_pitch = 3;
 816             p_pic->i_planes = 1;
 817             break;
 818
 819         case FOURCC_RV32:
 820         case FOURCC_RGBA:
 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 * 4;
 824             p_pic->p->i_visible_pitch = i_width * 4;
 825             p_pic->p->i_pixel_pitch = 4;
 826             p_pic->i_planes = 1;
 827             break;
 828
 829         case FOURCC_GREY:
 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;
 833             p_pic->p->i_visible_pitch = i_width;
 834             p_pic->p->i_pixel_pitch = 1;
 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_libvlc->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_libvlc->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 }