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 #include <stdlib.h>                                                /* free() */
  29 #include <stdio.h>                                              /* sprintf() */
  30 #include <string.h>                                            /* strerror() */
  31
  32 #include <vlc/vlc.h>
  33
  34 #include "vlc_video.h"
  35 #include "video_output.h"
  36 #include "vlc_spu.h"
  37
  38 #include "vout_pictures.h"
  39
  40 /**
  41  * Display a picture
  42  *
  43  * Remove the reservation flag of a picture, which will cause it to be ready
  44  * for display. The picture won't be displayed until vout_DatePicture has been
  45  * called.
  46  */
  47 void vout_DisplayPicture( vout_thread_t *p_vout, picture_t *p_pic )
  48 {
  49     vlc_mutex_lock( &p_vout->picture_lock );
  50     switch( p_pic->i_status )
  51     {
  52     case RESERVED_PICTURE:
  53         p_pic->i_status = RESERVED_DISP_PICTURE;
  54         break;
  55     case RESERVED_DATED_PICTURE:
  56         p_pic->i_status = READY_PICTURE;
  57         break;
  58     default:
  59         msg_Err( p_vout, "picture to display %p has invalid status %d",
  60                          p_pic, p_pic->i_status );
  61         break;
  62     }
  63
  64     vlc_mutex_unlock( &p_vout->picture_lock );
  65 }
  66
  67 /**
  68  * Date a picture
  69  *
  70  * Remove the reservation flag of a picture, which will cause it to be ready
  71  * for display. The picture won't be displayed until vout_DisplayPicture has
  72  * been called.
  73  * \param p_vout The vout in question
  74  * \param p_pic The picture to date
  75  * \param date The date to display the picture
  76  */
  77 void vout_DatePicture( vout_thread_t *p_vout,
  78                        picture_t *p_pic, mtime_t date )
  79 {
  80     vlc_mutex_lock( &p_vout->picture_lock );
  81     p_pic->date = date;
  82     switch( p_pic->i_status )
  83     {
  84     case RESERVED_PICTURE:
  85         p_pic->i_status = RESERVED_DATED_PICTURE;
  86         break;
  87     case RESERVED_DISP_PICTURE:
  88         p_pic->i_status = READY_PICTURE;
  89         break;
  90     default:
  91         msg_Err( p_vout, "picture to date %p has invalid status %d",
  92                          p_pic, p_pic->i_status );
  93         break;
  94     }
  95
  96     vlc_mutex_unlock( &p_vout->picture_lock );
  97 }
  98
  99 /**
 100  * Allocate a picture in the video output heap.
 101  *
 102  * This function creates a reserved image in the video output heap.
 103  * A null pointer is returned if the function fails. This method provides an
 104  * already allocated zone of memory in the picture data fields.
 105  * It needs locking since several pictures can be created by several producers
 106  * threads.
 107  */
 108 picture_t *vout_CreatePicture( vout_thread_t *p_vout,
 109                                vlc_bool_t b_progressive,
 110                                vlc_bool_t b_top_field_first,
 111                                unsigned int i_nb_fields )
 112 {
 113     int         i_pic;                                      /* picture index */
 114     picture_t * p_pic;
 115     picture_t * p_freepic = NULL;                      /* first free picture */
 116
 117     /* Get lock */
 118     vlc_mutex_lock( &p_vout->picture_lock );
 119
 120     /*
 121      * Look for an empty place in the picture heap.
 122      */
 123     for( i_pic = 0; i_pic < I_RENDERPICTURES; i_pic++ )
 124     {
 125         p_pic = PP_RENDERPICTURE[(p_vout->render.i_last_used_pic + i_pic + 1)
 126                                  % I_RENDERPICTURES];
 127
 128         switch( p_pic->i_status )
 129         {
 130             case DESTROYED_PICTURE:
 131                 /* Memory will not be reallocated, and function can end
 132                  * immediately - this is the best possible case, since no
 133                  * memory allocation needs to be done */
 134                 p_pic->i_status   = RESERVED_PICTURE;
 135                 p_pic->i_refcount = 0;
 136                 p_pic->b_force    = 0;
 137
 138                 p_pic->b_progressive        = b_progressive;
 139                 p_pic->i_nb_fields          = i_nb_fields;
 140                 p_pic->b_top_field_first    = b_top_field_first;
 141
 142                 p_vout->i_heap_size++;
 143                 p_vout->render.i_last_used_pic =
 144                     ( p_vout->render.i_last_used_pic + i_pic + 1 )
 145                     % I_RENDERPICTURES;
 146                 vlc_mutex_unlock( &p_vout->picture_lock );
 147                 return( p_pic );
 148
 149             case FREE_PICTURE:
 150                 /* Picture is empty and ready for allocation */
 151                 p_vout->render.i_last_used_pic =
 152                     ( p_vout->render.i_last_used_pic + i_pic + 1 )
 153                     % I_RENDERPICTURES;
 154                 p_freepic = p_pic;
 155                 break;
 156
 157             default:
 158                 break;
 159         }
 160     }
 161
 162     /*
 163      * Prepare picture
 164      */
 165     if( p_freepic != NULL )
 166     {
 167         vout_AllocatePicture( VLC_OBJECT(p_vout),
 168                               p_freepic, p_vout->render.i_chroma,
 169                               p_vout->render.i_width, p_vout->render.i_height,
 170                               p_vout->render.i_aspect );
 171
 172         if( p_freepic->i_planes )
 173         {
 174             /* Copy picture information, set some default values */
 175             p_freepic->i_status   = RESERVED_PICTURE;
 176             p_freepic->i_type     = MEMORY_PICTURE;
 177             p_freepic->b_slow     = 0;
 178
 179             p_freepic->i_refcount = 0;
 180             p_freepic->b_force = 0;
 181
 182             p_freepic->b_progressive        = b_progressive;
 183             p_freepic->i_nb_fields          = i_nb_fields;
 184             p_freepic->b_top_field_first    = b_top_field_first;
 185
 186             p_freepic->i_matrix_coefficients = 1;
 187
 188             p_vout->i_heap_size++;
 189         }
 190         else
 191         {
 192             /* Memory allocation failed : set picture as empty */
 193             p_freepic->i_status = FREE_PICTURE;
 194             p_freepic = NULL;
 195
 196             msg_Err( p_vout, "picture allocation failed" );
 197         }
 198
 199         vlc_mutex_unlock( &p_vout->picture_lock );
 200
 201         return( p_freepic );
 202     }
 203
 204     /* No free or destroyed picture could be found, but the decoder
 205      * will try again in a while. */
 206     vlc_mutex_unlock( &p_vout->picture_lock );
 207
 208     return( NULL );
 209 }
 210
 211 /**
 212  * Remove a permanent or reserved picture from the heap
 213  *
 214  * This function frees a previously reserved picture or a permanent
 215  * picture. It is meant to be used when the construction of a picture aborted.
 216  * Note that the picture will be destroyed even if it is linked !
 217  */
 218 void vout_DestroyPicture( vout_thread_t *p_vout, picture_t *p_pic )
 219 {
 220     vlc_mutex_lock( &p_vout->picture_lock );
 221
 222 #ifdef DEBUG
 223     /* Check if picture status is valid */
 224     if( (p_pic->i_status != RESERVED_PICTURE) &&
 225         (p_pic->i_status != RESERVED_DATED_PICTURE) &&
 226         (p_pic->i_status != RESERVED_DISP_PICTURE) )
 227     {
 228         msg_Err( p_vout, "picture to destroy %p has invalid status %d",
 229                          p_pic, p_pic->i_status );
 230     }
 231 #endif
 232
 233     p_pic->i_status = DESTROYED_PICTURE;
 234     p_vout->i_heap_size--;
 235
 236     vlc_mutex_unlock( &p_vout->picture_lock );
 237 }
 238
 239 /**
 240  * Increment reference counter of a picture
 241  *
 242  * This function increments the reference counter of a picture in the video
 243  * heap. It needs a lock since several producer threads can access the picture.
 244  */
 245 void vout_LinkPicture( vout_thread_t *p_vout, picture_t *p_pic )
 246 {
 247     vlc_mutex_lock( &p_vout->picture_lock );
 248     p_pic->i_refcount++;
 249     vlc_mutex_unlock( &p_vout->picture_lock );
 250 }
 251
 252 /**
 253  * Decrement reference counter of a picture
 254  *
 255  * This function decrement the reference counter of a picture in the video heap
 256  */
 257 void vout_UnlinkPicture( vout_thread_t *p_vout, picture_t *p_pic )
 258 {
 259     vlc_mutex_lock( &p_vout->picture_lock );
 260     p_pic->i_refcount--;
 261
 262     if( p_pic->i_refcount < 0 )
 263     {
 264         msg_Err( p_vout, "picture %p refcount is %i",
 265                  p_pic, p_pic->i_refcount );
 266         p_pic->i_refcount = 0;
 267     }
 268
 269     if( ( p_pic->i_refcount == 0 ) &&
 270         ( p_pic->i_status == DISPLAYED_PICTURE ) )
 271     {
 272         p_pic->i_status = DESTROYED_PICTURE;
 273         p_vout->i_heap_size--;
 274     }
 275
 276     vlc_mutex_unlock( &p_vout->picture_lock );
 277 }
 278
 279 /**
 280  * Render a picture
 281  *
 282  * This function chooses whether the current picture needs to be copied
 283  * before rendering, does the subpicture magic, and tells the video output
 284  * thread which direct buffer needs to be displayed.
 285  */
 286 picture_t * vout_RenderPicture( vout_thread_t *p_vout, picture_t *p_pic,
 287                                                        subpicture_t *p_subpic )
 288 {
 289     int i_scale_width, i_scale_height;
 290
 291     if( p_pic == NULL )
 292     {
 293         /* XXX: subtitles */
 294         return NULL;
 295     }
 296
 297     i_scale_width = p_vout->fmt_out.i_visible_width * 1000 /
 298         p_vout->fmt_in.i_visible_width;
 299     i_scale_height = p_vout->fmt_out.i_visible_height * 1000 /
 300         p_vout->fmt_in.i_visible_height;
 301
 302     if( p_pic->i_type == DIRECT_PICTURE )
 303     {
 304         if( !p_vout->render.b_allow_modify_pics || p_pic->i_refcount ||
 305             p_pic->b_force )
 306         {
 307             /* Picture is in a direct buffer and is still in use,
 308              * we need to copy it to another direct buffer before
 309              * displaying it if there are subtitles. */
 310             if( p_subpic != NULL )
 311             {
 312                 /* We have subtitles. First copy the picture to
 313                  * the spare direct buffer, then render the
 314                  * subtitles. */
 315                 vout_CopyPicture( p_vout, PP_OUTPUTPICTURE[0], p_pic );
 316
 317                 spu_RenderSubpictures( p_vout->p_spu, &p_vout->fmt_out,
 318                                        PP_OUTPUTPICTURE[0], p_pic, p_subpic,
 319                                        i_scale_width, i_scale_height );
 320
 321                 return PP_OUTPUTPICTURE[0];
 322             }
 323
 324             /* No subtitles, picture is in a directbuffer so
 325              * we can display it directly even if it is still
 326              * in use. */
 327             return p_pic;
 328         }
 329
 330         /* Picture is in a direct buffer but isn't used by the
 331          * decoder. We can safely render subtitles on it and
 332          * display it. */
 333         spu_RenderSubpictures( p_vout->p_spu, &p_vout->fmt_out, p_pic, p_pic,
 334                                p_subpic, i_scale_width, i_scale_height );
 335
 336         return p_pic;
 337     }
 338
 339     /* Not a direct buffer. We either need to copy it to a direct buffer,
 340      * or render it if the chroma isn't the same. */
 341     if( p_vout->b_direct )
 342     {
 343         /* Picture is not in a direct buffer, but is exactly the
 344          * same size as the direct buffers. A memcpy() is enough,
 345          * then render the subtitles. */
 346
 347         if( PP_OUTPUTPICTURE[0]->pf_lock )
 348             if( PP_OUTPUTPICTURE[0]->pf_lock( p_vout, PP_OUTPUTPICTURE[0] ) )
 349                 return NULL;
 350
 351         vout_CopyPicture( p_vout, PP_OUTPUTPICTURE[0], p_pic );
 352         spu_RenderSubpictures( p_vout->p_spu, &p_vout->fmt_out,
 353                                PP_OUTPUTPICTURE[0], p_pic,
 354                                p_subpic, i_scale_width, i_scale_height );
 355
 356         if( PP_OUTPUTPICTURE[0]->pf_unlock )
 357             PP_OUTPUTPICTURE[0]->pf_unlock( p_vout, PP_OUTPUTPICTURE[0] );
 358
 359         return PP_OUTPUTPICTURE[0];
 360     }
 361
 362     /* Picture is not in a direct buffer, and needs to be converted to
 363      * another size/chroma. Then the subtitles need to be rendered as
 364      * well. This usually means software YUV, or hardware YUV with a
 365      * different chroma. */
 366
 367     if( p_subpic != NULL && p_vout->p_picture[0].b_slow )
 368     {
 369         /* The picture buffer is in slow memory. We'll use
 370          * the "2 * VOUT_MAX_PICTURES + 1" picture as a temporary
 371          * one for subpictures rendering. */
 372         picture_t *p_tmp_pic = &p_vout->p_picture[2 * VOUT_MAX_PICTURES];
 373         if( p_tmp_pic->i_status == FREE_PICTURE )
 374         {
 375             vout_AllocatePicture( VLC_OBJECT(p_vout),
 376                                   p_tmp_pic, p_vout->fmt_out.i_chroma,
 377                                   p_vout->fmt_out.i_width,
 378                                   p_vout->fmt_out.i_height,
 379                                   p_vout->fmt_out.i_aspect );
 380             p_tmp_pic->i_type = MEMORY_PICTURE;
 381             p_tmp_pic->i_status = RESERVED_PICTURE;
 382         }
 383
 384         /* Convert image to the first direct buffer */
 385         p_vout->chroma.pf_convert( p_vout, p_pic, p_tmp_pic );
 386
 387         /* Render subpictures on the first direct buffer */
 388         spu_RenderSubpictures( p_vout->p_spu, &p_vout->fmt_out, p_tmp_pic,
 389                                p_tmp_pic, p_subpic,
 390                                i_scale_width, i_scale_height );
 391
 392         if( p_vout->p_picture[0].pf_lock )
 393             if( p_vout->p_picture[0].pf_lock( p_vout, &p_vout->p_picture[0] ) )
 394                 return NULL;
 395
 396         vout_CopyPicture( p_vout, &p_vout->p_picture[0], p_tmp_pic );
 397     }
 398     else
 399     {
 400         if( p_vout->p_picture[0].pf_lock )
 401             if( p_vout->p_picture[0].pf_lock( p_vout, &p_vout->p_picture[0] ) )
 402                 return NULL;
 403
 404         /* Convert image to the first direct buffer */
 405         p_vout->chroma.pf_convert( p_vout, p_pic, &p_vout->p_picture[0] );
 406
 407         /* Render subpictures on the first direct buffer */
 408         spu_RenderSubpictures( p_vout->p_spu, &p_vout->fmt_out,
 409                                &p_vout->p_picture[0], &p_vout->p_picture[0],
 410                                p_subpic, i_scale_width, i_scale_height );
 411     }
 412
 413     if( p_vout->p_picture[0].pf_unlock )
 414         p_vout->p_picture[0].pf_unlock( p_vout, &p_vout->p_picture[0] );
 415
 416     return &p_vout->p_picture[0];
 417 }
 418
 419 /**
 420  * Calculate image window coordinates
 421  *
 422  * This function will be accessed by plugins. It calculates the relative
 423  * position of the output window and the image window.
 424  */
 425 void vout_PlacePicture( vout_thread_t *p_vout,
 426                         unsigned int i_width, unsigned int i_height,
 427                         unsigned int *pi_x, unsigned int *pi_y,
 428                         unsigned int *pi_width, unsigned int *pi_height )
 429 {
 430     if( (i_width <= 0) || (i_height <=0) )
 431     {
 432         *pi_width = *pi_height = *pi_x = *pi_y = 0;
 433         return;
 434     }
 435
 436     if( p_vout->b_scale )
 437     {
 438         *pi_width = i_width;
 439         *pi_height = i_height;
 440     }
 441     else
 442     {
 443         *pi_width = __MIN( i_width, p_vout->fmt_in.i_visible_width );
 444         *pi_height = __MIN( i_height, p_vout->fmt_in.i_visible_height );
 445     }
 446
 447     if( p_vout->fmt_in.i_visible_width * (int64_t)p_vout->fmt_in.i_sar_num *
 448         *pi_height / p_vout->fmt_in.i_visible_height /
 449         p_vout->fmt_in.i_sar_den > *pi_width )
 450     {
 451         *pi_height = p_vout->fmt_in.i_visible_height *
 452             (int64_t)p_vout->fmt_in.i_sar_den * *pi_width /
 453             p_vout->fmt_in.i_visible_width / p_vout->fmt_in.i_sar_num;
 454     }
 455     else
 456     {
 457         *pi_width = p_vout->fmt_in.i_visible_width *
 458             (int64_t)p_vout->fmt_in.i_sar_num * *pi_height /
 459             p_vout->fmt_in.i_visible_height / p_vout->fmt_in.i_sar_den;
 460     }
 461
 462     switch( p_vout->i_alignment & VOUT_ALIGN_HMASK )
 463     {
 464     case VOUT_ALIGN_LEFT:
 465         *pi_x = 0;
 466         break;
 467     case VOUT_ALIGN_RIGHT:
 468         *pi_x = i_width - *pi_width;
 469         break;
 470     default:
 471         *pi_x = ( i_width - *pi_width ) / 2;
 472     }
 473
 474     switch( p_vout->i_alignment & VOUT_ALIGN_VMASK )
 475     {
 476     case VOUT_ALIGN_TOP:
 477         *pi_y = 0;
 478         break;
 479     case VOUT_ALIGN_BOTTOM:
 480         *pi_y = i_height - *pi_height;
 481         break;
 482     default:
 483         *pi_y = ( i_height - *pi_height ) / 2;
 484     }
 485 }
 486
 487 /**
 488  * Allocate a new picture in the heap.
 489  *
 490  * This function allocates a fake direct buffer in memory, which can be
 491  * used exactly like a video buffer. The video output thread then manages
 492  * how it gets displayed.
 493  */
 494 int __vout_AllocatePicture( vlc_object_t *p_this, picture_t *p_pic,
 495                             vlc_fourcc_t i_chroma,
 496                             int i_width, int i_height, int i_aspect )
 497 {
 498     int i_bytes, i_index, i_width_aligned, i_height_aligned;
 499
 500     /* Make sure the real dimensions are a multiple of 16 */
 501     i_width_aligned = (i_width + 15) >> 4 << 4;
 502     i_height_aligned = (i_height + 15) >> 4 << 4;
 503
 504     if( vout_InitPicture( p_this, p_pic, i_chroma,
 505                           i_width, i_height, i_aspect ) != VLC_SUCCESS )
 506     {
 507         p_pic->i_planes = 0;
 508         return VLC_EGENERIC;
 509     }
 510
 511     /* Calculate how big the new image should be */
 512     i_bytes = p_pic->format.i_bits_per_pixel *
 513         i_width_aligned * i_height_aligned / 8;
 514
 515     p_pic->p_data = vlc_memalign( &p_pic->p_data_orig, 16, i_bytes );
 516
 517     if( p_pic->p_data == NULL )
 518     {
 519         p_pic->i_planes = 0;
 520         return VLC_EGENERIC;
 521     }
 522
 523     /* Fill the p_pixels field for each plane */
 524     p_pic->p[ 0 ].p_pixels = p_pic->p_data;
 525
 526     for( i_index = 1; i_index < p_pic->i_planes; i_index++ )
 527     {
 528         p_pic->p[i_index].p_pixels = p_pic->p[i_index-1].p_pixels +
 529             p_pic->p[i_index-1].i_lines * p_pic->p[i_index-1].i_pitch;
 530     }
 531
 532     return VLC_SUCCESS;
 533 }
 534
 535 /**
 536  * Initialise the video format fields given chroma/size.
 537  *
 538  * This function initializes all the video_frame_format_t fields given the
 539  * static properties of a picture (chroma and size).
 540  * \param p_format Pointer to the format structure to initialize
 541  * \param i_chroma Chroma to set
 542  * \param i_width Width to set
 543  * \param i_height Height to set
 544  * \param i_aspect Aspect ratio
 545  */
 546 void vout_InitFormat( video_frame_format_t *p_format, vlc_fourcc_t i_chroma,
 547                       int i_width, int i_height, int i_aspect )
 548 {
 549     p_format->i_chroma   = i_chroma;
 550     p_format->i_width    = p_format->i_visible_width  = i_width;
 551     p_format->i_height   = p_format->i_visible_height = i_height;
 552     p_format->i_x_offset = p_format->i_y_offset = 0;
 553     p_format->i_aspect   = i_aspect;
 554
 555 #if 0
 556     /* Assume we have square pixels */
 557     if( i_width && i_height )
 558         p_format->i_aspect = i_width * VOUT_ASPECT_FACTOR / i_height;
 559     else
 560         p_format->i_aspect = 0;
 561 #endif
 562
 563     switch( i_chroma )
 564     {
 565         case FOURCC_YUVA:
 566             p_format->i_bits_per_pixel = 32;
 567             break;
 568         case FOURCC_I444:
 569         case FOURCC_J444:
 570             p_format->i_bits_per_pixel = 24;
 571             break;
 572         case FOURCC_I422:
 573         case FOURCC_YUY2:
 574         case FOURCC_UYVY:
 575         case FOURCC_J422:
 576             p_format->i_bits_per_pixel = 16;
 577             p_format->i_bits_per_pixel = 16;
 578             break;
 579         case FOURCC_I411:
 580         case FOURCC_YV12:
 581         case FOURCC_I420:
 582         case FOURCC_J420:
 583         case FOURCC_IYUV:
 584             p_format->i_bits_per_pixel = 12;
 585             break;
 586         case FOURCC_I410:
 587         case FOURCC_YVU9:
 588             p_format->i_bits_per_pixel = 9;
 589             break;
 590         case FOURCC_Y211:
 591             p_format->i_bits_per_pixel = 8;
 592             break;
 593         case FOURCC_YUVP:
 594             p_format->i_bits_per_pixel = 8;
 595             break;
 596
 597         case FOURCC_RV32:
 598             p_format->i_bits_per_pixel = 32;
 599             break;
 600         case FOURCC_RV24:
 601             p_format->i_bits_per_pixel = 24;
 602             break;
 603         case FOURCC_RV15:
 604         case FOURCC_RV16:
 605             p_format->i_bits_per_pixel = 16;
 606             break;
 607         case FOURCC_RGB2:
 608             p_format->i_bits_per_pixel = 8;
 609             break;
 610         default:
 611             p_format->i_bits_per_pixel = 0;
 612             break;
 613     }
 614 }
 615
 616 /**
 617  * Initialise the picture_t fields given chroma/size.
 618  *
 619  * This function initializes most of the picture_t fields given a chroma and
 620  * size. It makes the assumption that stride == width.
 621  * \param p_this The calling object
 622  * \param p_pic Pointer to the picture to initialize
 623  * \param i_chroma The chroma fourcc to set
 624  * \param i_width The width of the picture
 625  * \param i_height The height of the picture
 626  * \param i_aspect The aspect ratio of the picture
 627  */
 628 int __vout_InitPicture( vlc_object_t *p_this, picture_t *p_pic,
 629                         vlc_fourcc_t i_chroma,
 630                         int i_width, int i_height, int i_aspect )
 631 {
 632     int i_index, i_width_aligned, i_height_aligned;
 633
 634     /* Store default values */
 635     for( i_index = 0; i_index < VOUT_MAX_PLANES; i_index++ )
 636     {
 637         p_pic->p[i_index].p_pixels = NULL;
 638         p_pic->p[i_index].i_pixel_pitch = 1;
 639     }
 640
 641     p_pic->pf_release = 0;
 642     p_pic->pf_lock = 0;
 643     p_pic->pf_unlock = 0;
 644     p_pic->i_refcount = 0;
 645
 646     vout_InitFormat( &p_pic->format, i_chroma, i_width, i_height, i_aspect );
 647
 648     /* Make sure the real dimensions are a multiple of 16 */
 649     i_width_aligned = (i_width + 15) >> 4 << 4;
 650     i_height_aligned = (i_height + 15) >> 4 << 4;
 651
 652     /* Calculate coordinates */
 653     switch( i_chroma )
 654     {
 655         case FOURCC_I411:
 656             p_pic->p[ Y_PLANE ].i_lines = i_height_aligned;
 657             p_pic->p[ Y_PLANE ].i_visible_lines = i_height;
 658             p_pic->p[ Y_PLANE ].i_pitch = i_width_aligned;
 659             p_pic->p[ Y_PLANE ].i_visible_pitch = i_width;
 660             p_pic->p[ U_PLANE ].i_lines = i_height_aligned;
 661             p_pic->p[ U_PLANE ].i_visible_lines = i_height;
 662             p_pic->p[ U_PLANE ].i_pitch = i_width_aligned / 4;
 663             p_pic->p[ U_PLANE ].i_visible_pitch = i_width / 4;
 664             p_pic->p[ V_PLANE ].i_lines = i_height_aligned;
 665             p_pic->p[ V_PLANE ].i_visible_lines = i_height;
 666             p_pic->p[ V_PLANE ].i_pitch = i_width_aligned / 4;
 667             p_pic->p[ V_PLANE ].i_visible_pitch = i_width / 4;
 668             p_pic->i_planes = 3;
 669             break;
 670
 671         case FOURCC_I410:
 672         case FOURCC_YVU9:
 673             p_pic->p[ Y_PLANE ].i_lines = i_height_aligned;
 674             p_pic->p[ Y_PLANE ].i_visible_lines = i_height;
 675             p_pic->p[ Y_PLANE ].i_pitch = i_width_aligned;
 676             p_pic->p[ Y_PLANE ].i_visible_pitch = i_width;
 677             p_pic->p[ U_PLANE ].i_lines = i_height_aligned / 4;
 678             p_pic->p[ U_PLANE ].i_visible_lines = i_height / 4;
 679             p_pic->p[ U_PLANE ].i_pitch = i_width_aligned / 4;
 680             p_pic->p[ U_PLANE ].i_visible_pitch = i_width / 4;
 681             p_pic->p[ V_PLANE ].i_lines = i_height_aligned / 4;
 682             p_pic->p[ V_PLANE ].i_visible_lines = i_height / 4;
 683             p_pic->p[ V_PLANE ].i_pitch = i_width_aligned / 4;
 684             p_pic->p[ V_PLANE ].i_visible_pitch = i_width / 4;
 685             p_pic->i_planes = 3;
 686             break;
 687
 688         case FOURCC_YV12:
 689         case FOURCC_I420:
 690         case FOURCC_IYUV:
 691         case FOURCC_J420:
 692             p_pic->p[ Y_PLANE ].i_lines = i_height_aligned;
 693             p_pic->p[ Y_PLANE ].i_visible_lines = i_height;
 694             p_pic->p[ Y_PLANE ].i_pitch = i_width_aligned;
 695             p_pic->p[ Y_PLANE ].i_visible_pitch = i_width;
 696             p_pic->p[ U_PLANE ].i_lines = i_height_aligned / 2;
 697             p_pic->p[ U_PLANE ].i_visible_lines = i_height / 2;
 698             p_pic->p[ U_PLANE ].i_pitch = i_width_aligned / 2;
 699             p_pic->p[ U_PLANE ].i_visible_pitch = i_width / 2;
 700             p_pic->p[ V_PLANE ].i_lines = i_height_aligned / 2;
 701             p_pic->p[ V_PLANE ].i_visible_lines = i_height / 2;
 702             p_pic->p[ V_PLANE ].i_pitch = i_width_aligned / 2;
 703             p_pic->p[ V_PLANE ].i_visible_pitch = i_width / 2;
 704             p_pic->i_planes = 3;
 705             break;
 706
 707         case FOURCC_I422:
 708         case FOURCC_J422:
 709             p_pic->p[ Y_PLANE ].i_lines = i_height_aligned;
 710             p_pic->p[ Y_PLANE ].i_visible_lines = i_height;
 711             p_pic->p[ Y_PLANE ].i_pitch = i_width_aligned;
 712             p_pic->p[ Y_PLANE ].i_visible_pitch = i_width;
 713             p_pic->p[ U_PLANE ].i_lines = i_height_aligned;
 714             p_pic->p[ U_PLANE ].i_visible_lines = i_height;
 715             p_pic->p[ U_PLANE ].i_pitch = i_width_aligned / 2;
 716             p_pic->p[ U_PLANE ].i_visible_pitch = i_width / 2;
 717             p_pic->p[ V_PLANE ].i_lines = i_height_aligned;
 718             p_pic->p[ V_PLANE ].i_visible_lines = i_height;
 719             p_pic->p[ V_PLANE ].i_pitch = i_width_aligned / 2;
 720             p_pic->p[ V_PLANE ].i_visible_pitch = i_width / 2;
 721             p_pic->i_planes = 3;
 722             break;
 723
 724         case FOURCC_I444:
 725         case FOURCC_J444:
 726             p_pic->p[ Y_PLANE ].i_lines = i_height_aligned;
 727             p_pic->p[ Y_PLANE ].i_visible_lines = i_height;
 728             p_pic->p[ Y_PLANE ].i_pitch = i_width_aligned;
 729             p_pic->p[ Y_PLANE ].i_visible_pitch = i_width;
 730             p_pic->p[ U_PLANE ].i_lines = i_height_aligned;
 731             p_pic->p[ U_PLANE ].i_visible_lines = i_height;
 732             p_pic->p[ U_PLANE ].i_pitch = i_width_aligned;
 733             p_pic->p[ U_PLANE ].i_visible_pitch = i_width;
 734             p_pic->p[ V_PLANE ].i_lines = i_height_aligned;
 735             p_pic->p[ V_PLANE ].i_visible_lines = i_height;
 736             p_pic->p[ V_PLANE ].i_pitch = i_width_aligned;
 737             p_pic->p[ V_PLANE ].i_visible_pitch = i_width;
 738             p_pic->i_planes = 3;
 739             break;
 740
 741         case FOURCC_YUVA:
 742             p_pic->p[ Y_PLANE ].i_lines = i_height_aligned;
 743             p_pic->p[ Y_PLANE ].i_visible_lines = i_height;
 744             p_pic->p[ Y_PLANE ].i_pitch = i_width_aligned;
 745             p_pic->p[ Y_PLANE ].i_visible_pitch = i_width;
 746             p_pic->p[ U_PLANE ].i_lines = i_height_aligned;
 747             p_pic->p[ U_PLANE ].i_visible_lines = i_height;
 748             p_pic->p[ U_PLANE ].i_pitch = i_width_aligned;
 749             p_pic->p[ U_PLANE ].i_visible_pitch = i_width;
 750             p_pic->p[ V_PLANE ].i_lines = i_height_aligned;
 751             p_pic->p[ V_PLANE ].i_visible_lines = i_height;
 752             p_pic->p[ V_PLANE ].i_pitch = i_width_aligned;
 753             p_pic->p[ V_PLANE ].i_visible_pitch = i_width;
 754             p_pic->p[ A_PLANE ].i_lines = i_height_aligned;
 755             p_pic->p[ A_PLANE ].i_visible_lines = i_height;
 756             p_pic->p[ A_PLANE ].i_pitch = i_width_aligned;
 757             p_pic->p[ A_PLANE ].i_visible_pitch = i_width;
 758             p_pic->i_planes = 4;
 759             break;
 760
 761         case FOURCC_YUVP:
 762             p_pic->p->i_lines = i_height_aligned;
 763             p_pic->p->i_visible_lines = i_height;
 764             p_pic->p->i_pitch = i_width_aligned;
 765             p_pic->p->i_visible_pitch = i_width;
 766             p_pic->p->i_pixel_pitch = 8;
 767             p_pic->i_planes = 1;
 768             break;
 769
 770         case FOURCC_Y211:
 771             p_pic->p->i_lines = i_height_aligned;
 772             p_pic->p->i_visible_lines = i_height;
 773             p_pic->p->i_pitch = i_width_aligned;
 774             p_pic->p->i_visible_pitch = i_width;
 775             p_pic->p->i_pixel_pitch = 4;
 776             p_pic->i_planes = 1;
 777             break;
 778
 779         case FOURCC_UYVY:
 780         case FOURCC_YUY2:
 781             p_pic->p->i_lines = i_height_aligned;
 782             p_pic->p->i_visible_lines = i_height;
 783             p_pic->p->i_pitch = i_width_aligned * 2;
 784             p_pic->p->i_visible_pitch = i_width * 2;
 785             p_pic->p->i_pixel_pitch = 4;
 786             p_pic->i_planes = 1;
 787             break;
 788
 789         case FOURCC_RGB2:
 790             p_pic->p->i_lines = i_height_aligned;
 791             p_pic->p->i_visible_lines = i_height;
 792             p_pic->p->i_pitch = i_width_aligned;
 793             p_pic->p->i_visible_pitch = i_width;
 794             p_pic->p->i_pixel_pitch = 1;
 795             p_pic->i_planes = 1;
 796             break;
 797
 798         case FOURCC_RV15:
 799             p_pic->p->i_lines = i_height_aligned;
 800             p_pic->p->i_visible_lines = i_height;
 801             p_pic->p->i_pitch = i_width_aligned * 2;
 802             p_pic->p->i_visible_pitch = i_width * 2;
 803             p_pic->p->i_pixel_pitch = 2;
 804             p_pic->i_planes = 1;
 805             break;
 806
 807         case FOURCC_RV16:
 808             p_pic->p->i_lines = i_height_aligned;
 809             p_pic->p->i_visible_lines = i_height;
 810             p_pic->p->i_pitch = i_width_aligned * 2;
 811             p_pic->p->i_visible_pitch = i_width * 2;
 812             p_pic->p->i_pixel_pitch = 2;
 813             p_pic->i_planes = 1;
 814             break;
 815
 816         case FOURCC_RV24:
 817             p_pic->p->i_lines = i_height_aligned;
 818             p_pic->p->i_visible_lines = i_height;
 819             p_pic->p->i_pitch = i_width_aligned * 3;
 820             p_pic->p->i_visible_pitch = i_width * 3;
 821             p_pic->p->i_pixel_pitch = 3;
 822             p_pic->i_planes = 1;
 823             break;
 824
 825         case FOURCC_RV32:
 826             p_pic->p->i_lines = i_height_aligned;
 827             p_pic->p->i_visible_lines = i_height;
 828             p_pic->p->i_pitch = i_width_aligned * 4;
 829             p_pic->p->i_visible_pitch = i_width * 4;
 830             p_pic->p->i_pixel_pitch = 4;
 831             p_pic->i_planes = 1;
 832             break;
 833
 834         default:
 835             msg_Err( p_this, "unknown chroma type 0x%.8x (%4.4s)",
 836                              i_chroma, (char*)&i_chroma );
 837             p_pic->i_planes = 0;
 838             return VLC_EGENERIC;
 839     }
 840
 841     return VLC_SUCCESS;
 842 }
 843
 844 /**
 845  * Compare two chroma values
 846  *
 847  * This function returns 1 if the two fourcc values given as argument are
 848  * the same format (eg. UYVY/UYNV) or almost the same format (eg. I420/YV12)
 849  */
 850 int vout_ChromaCmp( vlc_fourcc_t i_chroma, vlc_fourcc_t i_amorhc )
 851 {
 852     /* If they are the same, they are the same ! */
 853     if( i_chroma == i_amorhc )
 854     {
 855         return 1;
 856     }
 857
 858     /* Check for equivalence classes */
 859     switch( i_chroma )
 860     {
 861         case FOURCC_I420:
 862         case FOURCC_IYUV:
 863         case FOURCC_YV12:
 864             switch( i_amorhc )
 865             {
 866                 case FOURCC_I420:
 867                 case FOURCC_IYUV:
 868                 case FOURCC_YV12:
 869                     return 1;
 870
 871                 default:
 872                     return 0;
 873             }
 874
 875         case FOURCC_UYVY:
 876         case FOURCC_UYNV:
 877         case FOURCC_Y422:
 878             switch( i_amorhc )
 879             {
 880                 case FOURCC_UYVY:
 881                 case FOURCC_UYNV:
 882                 case FOURCC_Y422:
 883                     return 1;
 884
 885                 default:
 886                     return 0;
 887             }
 888
 889         case FOURCC_YUY2:
 890         case FOURCC_YUNV:
 891             switch( i_amorhc )
 892             {
 893                 case FOURCC_YUY2:
 894                 case FOURCC_YUNV:
 895                     return 1;
 896
 897                 default:
 898                     return 0;
 899             }
 900
 901         default:
 902             return 0;
 903     }
 904 }
 905
 906 /*****************************************************************************
 907  * vout_CopyPicture: copy a picture to another one
 908  *****************************************************************************
 909  * This function takes advantage of the image format, and reduces the
 910  * number of calls to memcpy() to the minimum. Source and destination
 911  * images must have same width (hence i_visible_pitch), height, and chroma.
 912  *****************************************************************************/
 913 void __vout_CopyPicture( vlc_object_t *p_this,
 914                          picture_t *p_dest, picture_t *p_src )
 915 {
 916     int i;
 917
 918     for( i = 0; i < p_src->i_planes ; i++ )
 919     {
 920         if( p_src->p[i].i_pitch == p_dest->p[i].i_pitch )
 921         {
 922             /* There are margins, but with the same width : perfect ! */
 923             p_this->p_libvlc->pf_memcpy(
 924                          p_dest->p[i].p_pixels, p_src->p[i].p_pixels,
 925                          p_src->p[i].i_pitch * p_src->p[i].i_visible_lines );
 926         }
 927         else
 928         {
 929             /* We need to proceed line by line */
 930             uint8_t *p_in = p_src->p[i].p_pixels;
 931             uint8_t *p_out = p_dest->p[i].p_pixels;
 932             int i_line;
 933
 934             for( i_line = p_src->p[i].i_visible_lines; i_line--; )
 935             {
 936                 p_this->p_libvlc->pf_memcpy( p_out, p_in,
 937                                           p_src->p[i].i_visible_pitch );
 938                 p_in += p_src->p[i].i_pitch;
 939                 p_out += p_dest->p[i].i_pitch;
 940             }
 941         }
 942     }
 943
 944     p_dest->date = p_src->date;
 945     p_dest->b_force = p_src->b_force;
 946     p_dest->i_nb_fields = p_src->i_nb_fields;
 947     p_dest->b_progressive = p_src->b_progressive;
 948     p_dest->b_top_field_first = p_src->b_top_field_first;
 949 }