git.sesse.net Git - vlc/blob - src/video_output/video_output.c

   1 /******************************************************************************
   2  * video_output.c : video output thread
   3  * (c)2000 VideoLAN
   4  ******************************************************************************
   5  * This module describes the programming interface for video output threads.
   6  * It includes functions allowing to open a new thread, send pictures to a
   7  * thread, and destroy a previously oppenned video output thread.
   8  ******************************************************************************/
   9
  10 /******************************************************************************
  11  * Preamble
  12  ******************************************************************************/
  13 #include <errno.h>
  14 #include <stdlib.h>
  15 #include <stdio.h>
  16 #include <string.h>
  17
  18 #include "common.h"
  19 #include "config.h"
  20 #include "mtime.h"
  21 #include "vlc_thread.h"
  22 #include "video.h"
  23 #include "video_output.h"
  24 #include "video_text.h"
  25 #include "video_sys.h"
  26 #include "video_yuv.h"
  27 #include "intf_msg.h"
  28 #include "main.h"
  29
  30 /******************************************************************************
  31  * Local prototypes
  32  ******************************************************************************/
  33 static int      BinaryLog         ( u32 i );
  34 static void     MaskToShift       ( int *pi_left, int *pi_right, u32 i_mask );
  35 static int      InitThread        ( vout_thread_t *p_vout );
  36 static void     RunThread         ( vout_thread_t *p_vout );
  37 static void     ErrorThread       ( vout_thread_t *p_vout );
  38 static void     EndThread         ( vout_thread_t *p_vout );
  39 static void     DestroyThread     ( vout_thread_t *p_vout, int i_status );
  40 static void     Print             ( vout_thread_t *p_vout, int i_x, int i_y,
  41                                     int i_h_align, int i_v_align,
  42                                     unsigned char *psz_text );
  43 static void     SetBufferArea     ( vout_thread_t *p_vout, int i_x, int i_y,
  44                                     int i_w, int i_h );
  45 static void     SetBufferPicture  ( vout_thread_t *p_vout, picture_t *p_pic );
  46 static void     RenderPicture     ( vout_thread_t *p_vout, picture_t *p_pic );
  47 static void     RenderPictureInfo ( vout_thread_t *p_vout, picture_t *p_pic );
  48 static void     RenderSubPicture  ( vout_thread_t *p_vout,
  49                                     subpicture_t *p_subpic );
  50 static void     RenderInterface   ( vout_thread_t *p_vout );
  51 static int      RenderIdle        ( vout_thread_t *p_vout );
  52 static void     RenderInfo        ( vout_thread_t *p_vout );
  53 static int      Manage            ( vout_thread_t *p_vout );
  54 static int      Align             ( vout_thread_t *p_vout, int *pi_x,
  55                                     int *pi_y, int i_width, int i_height,
  56                                     int i_h_align, int i_v_align );
  57
  58 /******************************************************************************
  59  * vout_CreateThread: creates a new video output thread
  60  ******************************************************************************
  61  * This function creates a new video output thread, and returns a pointer
  62  * to its description. On error, it returns NULL.
  63  * If pi_status is NULL, then the function will block until the thread is ready.
  64  * If not, it will be updated using one of the THREAD_* constants.
  65  ******************************************************************************/
  66 vout_thread_t * vout_CreateThread               ( char *psz_display, int i_root_window,
  67                                                   int i_width, int i_height, int *pi_status )
  68 {
  69     vout_thread_t * p_vout;                              /* thread descriptor */
  70     int             i_status;                                /* thread status */
  71     int             i_index;                /* index for array initialization */
  72
  73     /* Allocate descriptor */
  74     intf_DbgMsg("\n");
  75     p_vout = (vout_thread_t *) malloc( sizeof(vout_thread_t) );
  76     if( p_vout == NULL )
  77     {
  78         intf_ErrMsg("error: %s\n", strerror(ENOMEM));
  79         return( NULL );
  80     }
  81
  82     /* Initialize thread properties - thread id and locks will be initialized
  83      * later */
  84     p_vout->b_die               = 0;
  85     p_vout->b_error             = 0;
  86     p_vout->b_active            = 0;
  87     p_vout->pi_status           = (pi_status != NULL) ? pi_status : &i_status;
  88     *p_vout->pi_status          = THREAD_CREATE;
  89
  90     /* Initialize some fields used by the system-dependant method - these fields will
  91      * probably be modified by the method, and are only preferences */
  92     p_vout->i_changes           = 0;
  93     p_vout->i_width             = i_width;
  94     p_vout->i_height            = i_height;
  95     p_vout->i_bytes_per_line    = i_width * 2;
  96     p_vout->i_screen_depth      = 15;
  97     p_vout->i_bytes_per_pixel   = 2;
  98     p_vout->f_gamma             = VOUT_GAMMA;
  99
 100     p_vout->b_grayscale         = main_GetIntVariable( VOUT_GRAYSCALE_VAR, VOUT_GRAYSCALE_DEFAULT );
 101     p_vout->b_info              = 0;
 102     p_vout->b_interface         = 0;
 103     p_vout->b_scale             = 0;
 104
 105     intf_DbgMsg("wished configuration: %dx%d, %d/%d bpp (%d Bpl)\n",
 106                 p_vout->i_width, p_vout->i_height, p_vout->i_screen_depth,
 107                 p_vout->i_bytes_per_pixel * 8, p_vout->i_bytes_per_line );
 108
 109     /* Initialize idle screen */
 110     p_vout->last_display_date   = mdate();
 111     p_vout->last_idle_date      = 0;
 112
 113 #ifdef STATS
 114     /* Initialize statistics fields */
 115     p_vout->render_time         = 0;
 116     p_vout->c_fps_samples       = 0;
 117 #endif
 118
 119     /* Initialize buffer index */
 120     p_vout->i_buffer_index      = 0;
 121
 122     /* Initialize pictures and subpictures - translation tables and functions
 123      * will be initialized later in InitThread */
 124     for( i_index = 0; i_index < VOUT_MAX_PICTURES; i_index++)
 125     {
 126         p_vout->p_picture[i_index].i_type   =   EMPTY_PICTURE;
 127         p_vout->p_picture[i_index].i_status =   FREE_PICTURE;
 128         p_vout->p_subpicture[i_index].i_type  = EMPTY_SUBPICTURE;
 129         p_vout->p_subpicture[i_index].i_status= FREE_SUBPICTURE;
 130     }
 131
 132     /* Create and initialize system-dependant method - this function issues its
 133      * own error messages */
 134     if( vout_SysCreate( p_vout, psz_display, i_root_window ) )
 135     {
 136       free( p_vout );
 137       return( NULL );
 138     }
 139     intf_DbgMsg("actual configuration: %dx%d, %d/%d bpp (%d Bpl), masks: 0x%x/0x%x/0x%x\n",
 140                 p_vout->i_width, p_vout->i_height, p_vout->i_screen_depth,
 141                 p_vout->i_bytes_per_pixel * 8, p_vout->i_bytes_per_line,
 142                 p_vout->i_red_mask, p_vout->i_green_mask, p_vout->i_blue_mask );
 143
 144     /* Calculate shifts from system-updated masks */
 145     MaskToShift( &p_vout->i_red_lshift,   &p_vout->i_red_rshift,   p_vout->i_red_mask );
 146     MaskToShift( &p_vout->i_green_lshift, &p_vout->i_green_rshift, p_vout->i_green_mask );
 147     MaskToShift( &p_vout->i_blue_lshift,  &p_vout->i_blue_rshift,  p_vout->i_blue_mask );
 148
 149     /* Set some usefull colors */
 150     p_vout->i_white_pixel = RGB2PIXEL( p_vout, 255, 255, 255 );
 151     p_vout->i_black_pixel = RGB2PIXEL( p_vout, 0, 0, 0 );
 152     p_vout->i_gray_pixel  = RGB2PIXEL( p_vout, 128, 128, 128 );
 153     p_vout->i_blue_pixel  = RGB2PIXEL( p_vout, 0, 0, 50 );
 154
 155     /* Load fonts - fonts must be initialized after the systme method since
 156      * they may be dependant of screen depth and other thread properties */
 157     p_vout->p_default_font      = vout_LoadFont( VOUT_DEFAULT_FONT );
 158     if( p_vout->p_default_font == NULL )
 159     {
 160         vout_SysDestroy( p_vout );
 161         free( p_vout );
 162         return( NULL );
 163     }
 164     p_vout->p_large_font        = vout_LoadFont( VOUT_LARGE_FONT );
 165     if( p_vout->p_large_font == NULL )
 166     {
 167         vout_UnloadFont( p_vout->p_default_font );
 168         vout_SysDestroy( p_vout );
 169         free( p_vout );
 170         return( NULL );
 171     }
 172
 173     /* Create thread and set locks */
 174     vlc_mutex_init( &p_vout->picture_lock );
 175     vlc_mutex_init( &p_vout->subpicture_lock );
 176     vlc_mutex_init( &p_vout->change_lock );
 177     vlc_mutex_lock( &p_vout->change_lock );
 178     if( vlc_thread_create( &p_vout->thread_id, "video output", (void *) RunThread, (void *) p_vout) )
 179     {
 180         intf_ErrMsg("error: %s\n", strerror(ENOMEM));
 181         vout_UnloadFont( p_vout->p_default_font );
 182         vout_UnloadFont( p_vout->p_large_font );
 183         vout_SysDestroy( p_vout );
 184         free( p_vout );
 185         return( NULL );
 186     }
 187
 188     intf_Msg("Video display initialized (%dx%d, %d/%d bpp)\n", p_vout->i_width,
 189              p_vout->i_height, p_vout->i_screen_depth, p_vout->i_bytes_per_pixel * 8 );
 190
 191     /* If status is NULL, wait until the thread is created */
 192     if( pi_status == NULL )
 193     {
 194         do
 195         {
 196             msleep( THREAD_SLEEP );
 197         }while( (i_status != THREAD_READY) && (i_status != THREAD_ERROR)
 198                 && (i_status != THREAD_FATAL) );
 199         if( i_status != THREAD_READY )
 200         {
 201             return( NULL );
 202         }
 203     }
 204     return( p_vout );
 205 }
 206
 207 /******************************************************************************
 208  * vout_DestroyThread: destroys a previously created thread
 209  ******************************************************************************
 210  * Destroy a terminated thread.
 211  * The function will request a destruction of the specified thread. If pi_error
 212  * is NULL, it will return once the thread is destroyed. Else, it will be
 213  * update using one of the THREAD_* constants.
 214  ******************************************************************************/
 215 void vout_DestroyThread( vout_thread_t *p_vout, int *pi_status )
 216 {
 217     int     i_status;                                        /* thread status */
 218
 219     /* Set status */
 220     intf_DbgMsg("\n");
 221     p_vout->pi_status = (pi_status != NULL) ? pi_status : &i_status;
 222     *p_vout->pi_status = THREAD_DESTROY;
 223
 224     /* Request thread destruction */
 225     p_vout->b_die = 1;
 226
 227     /* If status is NULL, wait until thread has been destroyed */
 228     if( pi_status == NULL )
 229     {
 230         do
 231         {
 232             msleep( THREAD_SLEEP );
 233         }while( (i_status != THREAD_OVER) && (i_status != THREAD_ERROR)
 234                 && (i_status != THREAD_FATAL) );
 235     }
 236 }
 237
 238 /******************************************************************************
 239  * vout_DisplaySubPicture: display a subpicture unit
 240  ******************************************************************************
 241  * Remove the reservation flag of an subpicture, which will cause it to be ready
 242  * for display. The picture does not need to be locked, since it is ignored by
 243  * the output thread if is reserved.
 244  ******************************************************************************/
 245 void  vout_DisplaySubPicture( vout_thread_t *p_vout, subpicture_t *p_subpic )
 246 {
 247 #ifdef DEBUG_VIDEO
 248     char        psz_begin_date[MSTRTIME_MAX_SIZE];  /* buffer for date string */
 249     char        psz_end_date[MSTRTIME_MAX_SIZE];    /* buffer for date string */
 250 #endif
 251
 252 #ifdef DEBUG
 253     /* Check if status is valid */
 254     if( p_subpic->i_status != RESERVED_SUBPICTURE )
 255     {
 256         intf_DbgMsg("error: subpicture %p has invalid status %d\n", p_subpic,
 257                     p_subpic->i_status );
 258     }
 259 #endif
 260
 261     /* Remove reservation flag */
 262     p_subpic->i_status = READY_SUBPICTURE;
 263
 264 #ifdef DEBUG_VIDEO
 265     /* Send subpicture informations */
 266     intf_DbgMsg("subpicture %p: type=%d, begin date=%s, end date=%s\n",
 267                 p_subpic, p_subpic->i_type,
 268                 mstrtime( psz_begin_date, p_subpic->begin_date ),
 269                 mstrtime( psz_end_date, p_subpic->end_date ) );
 270 #endif
 271 }
 272
 273 /******************************************************************************
 274  * vout_CreateSubPicture: allocate an subpicture in the video output heap.
 275  ******************************************************************************
 276  * This function create a reserved subpicture in the video output heap.
 277  * A null pointer is returned if the function fails. This method provides an
 278  * already allocated zone of memory in the spu data fields. It needs locking
 279  * since several pictures can be created by several producers threads.
 280  ******************************************************************************/
 281 subpicture_t *vout_CreateSubPicture( vout_thread_t *p_vout, int i_type,
 282                                      int i_size )
 283 {
 284     int                 i_subpic;                          /* subpicture index */
 285     subpicture_t *      p_free_subpic = NULL;         /* first free subpicture */
 286     subpicture_t *      p_destroyed_subpic = NULL;   /* first destroyed subpic */
 287
 288     /* Get lock */
 289     vlc_mutex_lock( &p_vout->subpicture_lock );
 290
 291     /*
 292      * Look for an empty place
 293      */
 294     for( i_subpic = 0; i_subpic < VOUT_MAX_PICTURES; i_subpic++ )
 295     {
 296         if( p_vout->p_subpicture[i_subpic].i_status == DESTROYED_SUBPICTURE )
 297         {
 298             /* Subpicture is marked for destruction, but is still allocated */
 299             if( (p_vout->p_subpicture[i_subpic].i_type  == i_type)   &&
 300                 (p_vout->p_subpicture[i_subpic].i_size  >= i_size) )
 301             {
 302                 /* Memory size do match or is smaller : memory will not be reallocated,
 303                  * and function can end immediately - this is the best possible case,
 304                  * since no memory allocation needs to be done */
 305                 p_vout->p_subpicture[i_subpic].i_status = RESERVED_SUBPICTURE;
 306 #ifdef DEBUG_VIDEO
 307                 intf_DbgMsg("subpicture %p (in destroyed subpicture slot)\n",
 308                             &p_vout->p_subpicture[i_subpic] );
 309 #endif
 310                 vlc_mutex_unlock( &p_vout->subpicture_lock );
 311                 return( &p_vout->p_subpicture[i_subpic] );
 312             }
 313             else if( p_destroyed_subpic == NULL )
 314             {
 315                 /* Memory size do not match, but subpicture index will be kept in
 316                  * case no other place are left */
 317                 p_destroyed_subpic = &p_vout->p_subpicture[i_subpic];
 318             }
 319         }
 320         else if( (p_free_subpic == NULL) &&
 321                  (p_vout->p_subpicture[i_subpic].i_status == FREE_SUBPICTURE ))
 322         {
 323             /* Subpicture is empty and ready for allocation */
 324             p_free_subpic = &p_vout->p_subpicture[i_subpic];
 325         }
 326     }
 327
 328     /* If no free subpicture is available, use a destroyed subpicture */
 329     if( (p_free_subpic == NULL) && (p_destroyed_subpic != NULL ) )
 330     {
 331         /* No free subpicture or matching destroyed subpicture has been found, but
 332          * a destroyed subpicture is still avalaible */
 333         free( p_destroyed_subpic->p_data );
 334         p_free_subpic = p_destroyed_subpic;
 335     }
 336
 337     /*
 338      * Prepare subpicture
 339      */
 340     if( p_free_subpic != NULL )
 341     {
 342         /* Allocate memory */
 343         switch( i_type )
 344         {
 345         case TEXT_SUBPICTURE:                               /* text subpicture */
 346             p_free_subpic->p_data = malloc( i_size + 1 );
 347             break;
 348 #ifdef DEBUG
 349         default:
 350             intf_DbgMsg("error: unknown subpicture type %d\n", i_type );
 351             p_free_subpic->p_data   =  NULL;
 352             break;
 353 #endif
 354         }
 355
 356         if( p_free_subpic->p_data != NULL )
 357         {                    /* Copy subpicture informations, set some default values */
 358             p_free_subpic->i_type                      = i_type;
 359             p_free_subpic->i_status                    = RESERVED_SUBPICTURE;
 360             p_free_subpic->i_size                      = i_size;
 361             p_free_subpic->i_x                         = 0;
 362             p_free_subpic->i_y                         = 0;
 363             p_free_subpic->i_width                     = 0;
 364             p_free_subpic->i_height                    = 0;
 365             p_free_subpic->i_horizontal_align          = CENTER_RALIGN;
 366             p_free_subpic->i_vertical_align            = CENTER_RALIGN;
 367         }
 368         else
 369         {
 370             /* Memory allocation failed : set subpicture as empty */
 371             p_free_subpic->i_type   =  EMPTY_SUBPICTURE;
 372             p_free_subpic->i_status =  FREE_SUBPICTURE;
 373             p_free_subpic =            NULL;
 374             intf_ErrMsg("warning: %s\n", strerror( ENOMEM ) );
 375         }
 376
 377 #ifdef DEBUG_VIDEO
 378         intf_DbgMsg("subpicture %p (in free subpicture slot)\n", p_free_subpic );
 379 #endif
 380         vlc_mutex_unlock( &p_vout->subpicture_lock );
 381         return( p_free_subpic );
 382     }
 383
 384     /* No free or destroyed subpicture could be found */
 385     intf_DbgMsg( "warning: heap is full\n" );
 386     vlc_mutex_unlock( &p_vout->subpicture_lock );
 387     return( NULL );
 388 }
 389
 390 /******************************************************************************
 391  * vout_DestroySubPicture: remove a subpicture from the heap
 392  ******************************************************************************
 393  * This function frees a previously reserved subpicture.
 394  * It is meant to be used when the construction of a picture aborted.
 395  * This function does not need locking since reserved subpictures are ignored
 396  * by the output thread.
 397  ******************************************************************************/
 398 void vout_DestroySubPicture( vout_thread_t *p_vout, subpicture_t *p_subpic )
 399 {
 400 #ifdef DEBUG
 401    /* Check if status is valid */
 402    if( p_subpic->i_status != RESERVED_SUBPICTURE )
 403    {
 404        intf_DbgMsg("error: subpicture %p has invalid status %d\n",
 405                    p_subpic, p_subpic->i_status );
 406    }
 407 #endif
 408
 409     p_subpic->i_status = DESTROYED_SUBPICTURE;
 410
 411 #ifdef DEBUG_VIDEO
 412     intf_DbgMsg("subpicture %p\n", p_subpic);
 413 #endif
 414 }
 415
 416 /*******************************************************************************
 417  * vout_DisplayPicture: display a picture
 418  *******************************************************************************
 419  * Remove the reservation flag of a picture, which will cause it to be ready for
 420  * display. The picture won't be displayed until vout_DatePicture has been
 421  * called.
 422  *******************************************************************************/
 423 void  vout_DisplayPicture( vout_thread_t *p_vout, picture_t *p_pic )
 424 {
 425     vlc_mutex_lock( &p_vout->picture_lock );
 426     switch( p_pic->i_status )
 427     {
 428     case RESERVED_PICTURE:
 429         p_pic->i_status = RESERVED_DISP_PICTURE;
 430         break;
 431     case RESERVED_DATED_PICTURE:
 432         p_pic->i_status = READY_PICTURE;
 433         break;
 434 #ifdef DEBUG
 435     default:
 436         intf_DbgMsg("error: picture %p has invalid status %d\n", p_pic, p_pic->i_status );
 437         break;
 438 #endif
 439     }
 440
 441 #ifdef DEBUG_VIDEO
 442     intf_DbgMsg("picture %p\n", p_pic);
 443 #endif
 444     vlc_mutex_unlock( &p_vout->picture_lock );
 445 }
 446
 447 /*******************************************************************************
 448  * vout_DatePicture: date a picture
 449  *******************************************************************************
 450  * Remove the reservation flag of a picture, which will cause it to be ready for
 451  * display. The picture won't be displayed until vout_DisplayPicture has been
 452  * called.
 453  *******************************************************************************/
 454 void  vout_DatePicture( vout_thread_t *p_vout, picture_t *p_pic, mtime_t date )
 455 {
 456 #ifdef DEBUG_VIDEO
 457     char        psz_date[MSTRTIME_MAX_SIZE];                           /* date */
 458 #endif
 459
 460     vlc_mutex_lock( &p_vout->picture_lock );
 461     p_pic->date = date;
 462     switch( p_pic->i_status )
 463     {
 464     case RESERVED_PICTURE:
 465         p_pic->i_status = RESERVED_DATED_PICTURE;
 466         break;
 467     case RESERVED_DISP_PICTURE:
 468         p_pic->i_status = READY_PICTURE;
 469         break;
 470 #ifdef DEBUG
 471     default:
 472         intf_DbgMsg("error: picture %p has invalid status %d\n", p_pic, p_pic->i_status );
 473         break;
 474 #endif
 475     }
 476
 477 #ifdef DEBUG_VIDEO
 478     intf_DbgMsg("picture %p, display date: %s\n", p_pic, mstrtime( psz_date, p_pic->date) );
 479 #endif
 480     vlc_mutex_unlock( &p_vout->picture_lock );
 481 }
 482
 483 /******************************************************************************
 484  * vout_CreatePicture: allocate a picture in the video output heap.
 485  ******************************************************************************
 486  * This function create a reserved image in the video output heap.
 487  * A null pointer is returned if the function fails. This method provides an
 488  * already allocated zone of memory in the picture data fields. It needs locking
 489  * since several pictures can be created by several producers threads.
 490  ******************************************************************************/
 491 picture_t *vout_CreatePicture( vout_thread_t *p_vout, int i_type,
 492                                int i_width, int i_height )
 493 {
 494     int         i_picture;                                   /* picture index */
 495     int         i_chroma_width = 0;                           /* chroma width */
 496     picture_t * p_free_picture = NULL;                  /* first free picture */
 497     picture_t * p_destroyed_picture = NULL;        /* first destroyed picture */
 498
 499     /* Get lock */
 500     vlc_mutex_lock( &p_vout->picture_lock );
 501
 502     /*
 503      * Look for an empty place
 504      */
 505     for( i_picture = 0; i_picture < VOUT_MAX_PICTURES; i_picture++ )
 506     {
 507         if( p_vout->p_picture[i_picture].i_status == DESTROYED_PICTURE )
 508         {
 509             /* Picture is marked for destruction, but is still allocated - note
 510              * that if width and type are the same for two pictures, chroma_width
 511              * should also be the same */
 512             if( (p_vout->p_picture[i_picture].i_type           == i_type)   &&
 513                 (p_vout->p_picture[i_picture].i_height         == i_height) &&
 514                 (p_vout->p_picture[i_picture].i_width          == i_width) )
 515             {
 516                 /* Memory size do match : memory will not be reallocated, and function
 517                  * can end immediately - this is the best possible case, since no
 518                  * memory allocation needs to be done */
 519                 p_vout->p_picture[i_picture].i_status = RESERVED_PICTURE;
 520 #ifdef DEBUG_VIDEO
 521                 intf_DbgMsg("picture %p (in destroyed picture slot)\n",
 522                             &p_vout->p_picture[i_picture] );
 523 #endif
 524                 vlc_mutex_unlock( &p_vout->picture_lock );
 525                 return( &p_vout->p_picture[i_picture] );
 526             }
 527             else if( p_destroyed_picture == NULL )
 528             {
 529                 /* Memory size do not match, but picture index will be kept in
 530                  * case no other place are left */
 531                 p_destroyed_picture = &p_vout->p_picture[i_picture];
 532             }
 533         }
 534         else if( (p_free_picture == NULL) &&
 535                  (p_vout->p_picture[i_picture].i_status == FREE_PICTURE ))
 536         {
 537             /* Picture is empty and ready for allocation */
 538             p_free_picture = &p_vout->p_picture[i_picture];
 539         }
 540     }
 541
 542     /* If no free picture is available, use a destroyed picture */
 543     if( (p_free_picture == NULL) && (p_destroyed_picture != NULL ) )
 544     {
 545         /* No free picture or matching destroyed picture has been found, but
 546          * a destroyed picture is still avalaible */
 547         free( p_destroyed_picture->p_data );
 548         p_free_picture = p_destroyed_picture;
 549     }
 550
 551     /*
 552      * Prepare picture
 553      */
 554     if( p_free_picture != NULL )
 555     {
 556         /* Allocate memory */
 557         switch( i_type )
 558         {
 559         case YUV_420_PICTURE:          /* YUV 420: 1,1/4,1/4 samples per pixel */
 560             i_chroma_width = i_width / 2;
 561             p_free_picture->p_data = malloc( i_height * i_chroma_width * 3 * sizeof( yuv_data_t ) );
 562             p_free_picture->p_y = (yuv_data_t *)p_free_picture->p_data;
 563             p_free_picture->p_u = (yuv_data_t *)p_free_picture->p_data +i_height*i_chroma_width*4/2;
 564             p_free_picture->p_v = (yuv_data_t *)p_free_picture->p_data +i_height*i_chroma_width*5/2;
 565             break;
 566         case YUV_422_PICTURE:          /* YUV 422: 1,1/2,1/2 samples per pixel */
 567             i_chroma_width = i_width / 2;
 568             p_free_picture->p_data = malloc( i_height * i_chroma_width * 4 * sizeof( yuv_data_t ) );
 569             p_free_picture->p_y = (yuv_data_t *)p_free_picture->p_data;
 570             p_free_picture->p_u = (yuv_data_t *)p_free_picture->p_data +i_height*i_chroma_width*2;
 571             p_free_picture->p_v = (yuv_data_t *)p_free_picture->p_data +i_height*i_chroma_width*3;
 572             break;
 573         case YUV_444_PICTURE:              /* YUV 444: 1,1,1 samples per pixel */
 574             i_chroma_width = i_width;
 575             p_free_picture->p_data = malloc( i_height * i_chroma_width * 3 * sizeof( yuv_data_t ) );
 576             p_free_picture->p_y = (yuv_data_t *)p_free_picture->p_data;
 577             p_free_picture->p_u = (yuv_data_t *)p_free_picture->p_data +i_height*i_chroma_width;
 578             p_free_picture->p_v = (yuv_data_t *)p_free_picture->p_data +i_height*i_chroma_width*2;
 579             break;
 580 #ifdef DEBUG
 581         default:
 582             intf_DbgMsg("error: unknown picture type %d\n", i_type );
 583             p_free_picture->p_data   =  NULL;
 584             break;
 585 #endif
 586         }
 587
 588         if( p_free_picture->p_data != NULL )
 589         {
 590             /* Copy picture informations, set some default values */
 591             p_free_picture->i_type                      = i_type;
 592             p_free_picture->i_status                    = RESERVED_PICTURE;
 593             p_free_picture->i_matrix_coefficients       = 1;
 594             p_free_picture->i_width                     = i_width;
 595             p_free_picture->i_height                    = i_height;
 596             p_free_picture->i_chroma_width              = i_chroma_width;
 597             p_free_picture->i_display_horizontal_offset = 0;
 598             p_free_picture->i_display_vertical_offset   = 0;
 599             p_free_picture->i_display_width             = i_width;
 600             p_free_picture->i_display_height            = i_height;
 601             p_free_picture->i_aspect_ratio              = AR_SQUARE_PICTURE;
 602             p_free_picture->i_refcount                  = 0;
 603         }
 604         else
 605         {
 606             /* Memory allocation failed : set picture as empty */
 607             p_free_picture->i_type   =  EMPTY_PICTURE;
 608             p_free_picture->i_status =  FREE_PICTURE;
 609             p_free_picture =            NULL;
 610             intf_ErrMsg("warning: %s\n", strerror( ENOMEM ) );
 611         }
 612
 613 #ifdef DEBUG_VIDEO
 614         intf_DbgMsg("picture %p (in free picture slot)\n", p_free_picture );
 615 #endif
 616         vlc_mutex_unlock( &p_vout->picture_lock );
 617         return( p_free_picture );
 618     }
 619
 620     /* No free or destroyed picture could be found */
 621     intf_DbgMsg( "warning: heap is full\n" );
 622     vlc_mutex_unlock( &p_vout->picture_lock );
 623     return( NULL );
 624 }
 625
 626 /******************************************************************************
 627  * vout_DestroyPicture: remove a permanent or reserved picture from the heap
 628  ******************************************************************************
 629  * This function frees a previously reserved picture or a permanent
 630  * picture. It is meant to be used when the construction of a picture aborted.
 631  * Note that the picture will be destroyed even if it is linked !
 632  * This function does not need locking since reserved pictures are ignored by
 633  * the output thread.
 634  ******************************************************************************/
 635 void vout_DestroyPicture( vout_thread_t *p_vout, picture_t *p_pic )
 636 {
 637 #ifdef DEBUG
 638    /* Check if picture status is valid */
 639    if( (p_pic->i_status != RESERVED_PICTURE) &&
 640        (p_pic->i_status != RESERVED_DATED_PICTURE) &&
 641        (p_pic->i_status != RESERVED_DISP_PICTURE) )
 642    {
 643        intf_DbgMsg("error: picture %p has invalid status %d\n", p_pic, p_pic->i_status );
 644    }
 645 #endif
 646
 647     p_pic->i_status = DESTROYED_PICTURE;
 648
 649 #ifdef DEBUG_VIDEO
 650     intf_DbgMsg("picture %p\n", p_pic);
 651 #endif
 652 }
 653
 654 /******************************************************************************
 655  * vout_LinkPicture: increment reference counter of a picture
 656  ******************************************************************************
 657  * This function increment the reference counter of a picture in the video
 658  * heap. It needs a lock since several producer threads can access the picture.
 659  ******************************************************************************/
 660 void vout_LinkPicture( vout_thread_t *p_vout, picture_t *p_pic )
 661 {
 662     vlc_mutex_lock( &p_vout->picture_lock );
 663     p_pic->i_refcount++;
 664
 665 #ifdef DEBUG_VIDEO
 666     intf_DbgMsg("picture %p refcount=%d\n", p_pic, p_pic->i_refcount );
 667 #endif
 668
 669     vlc_mutex_unlock( &p_vout->picture_lock );
 670 }
 671
 672 /******************************************************************************
 673  * vout_UnlinkPicture: decrement reference counter of a picture
 674  ******************************************************************************
 675  * This function decrement the reference counter of a picture in the video heap.
 676  ******************************************************************************/
 677 void vout_UnlinkPicture( vout_thread_t *p_vout, picture_t *p_pic )
 678 {
 679     vlc_mutex_lock( &p_vout->picture_lock );
 680     p_pic->i_refcount--;
 681
 682 #ifdef DEBUG_VIDEO
 683     if( p_pic->i_refcount < 0 )
 684     {
 685         intf_DbgMsg("error: refcount < 0\n");
 686         p_pic->i_refcount = 0;
 687     }
 688 #endif
 689
 690     if( (p_pic->i_refcount == 0) && (p_pic->i_status == DISPLAYED_PICTURE) )
 691     {
 692         p_pic->i_status = DESTROYED_PICTURE;
 693     }
 694
 695 #ifdef DEBUG_VIDEO
 696     intf_DbgMsg("picture %p refcount=%d\n", p_pic, p_pic->i_refcount );
 697 #endif
 698
 699     vlc_mutex_unlock( &p_vout->picture_lock );
 700 }
 701
 702 /******************************************************************************
 703  * vout_SetBuffers: set buffers adresses
 704  ******************************************************************************
 705  * This function is called by system drivers to set buffers video memory
 706  * adresses.
 707  ******************************************************************************/
 708 void vout_SetBuffers( vout_thread_t *p_vout, void *p_buf1, void *p_buf2 )
 709 {
 710     /* No picture previously */
 711     p_vout->p_buffer[0].i_pic_x =         0;
 712     p_vout->p_buffer[0].i_pic_y =         0;
 713     p_vout->p_buffer[0].i_pic_width =     0;
 714     p_vout->p_buffer[0].i_pic_height =    0;
 715     p_vout->p_buffer[1].i_pic_x =         0;
 716     p_vout->p_buffer[1].i_pic_y =         0;
 717     p_vout->p_buffer[1].i_pic_width =     0;
 718     p_vout->p_buffer[1].i_pic_height =    0;
 719
 720     /* The first area covers all the screen */
 721     p_vout->p_buffer[0].i_areas =                 1;
 722     p_vout->p_buffer[0].pi_area_begin[0] =        0;
 723     p_vout->p_buffer[0].pi_area_end[0] =          p_vout->i_height - 1;
 724     p_vout->p_buffer[1].i_areas =                 1;
 725     p_vout->p_buffer[1].pi_area_begin[0] =        0;
 726     p_vout->p_buffer[1].pi_area_end[0] =          p_vout->i_height - 1;
 727
 728     /* Set adresses */
 729     p_vout->p_buffer[0].p_data = p_buf1;
 730     p_vout->p_buffer[1].p_data = p_buf2;
 731 }
 732
 733 /*****************************************************************************
 734  * vout_Pixel2RGB: return red, green and blue from pixel value
 735  *****************************************************************************
 736  * Return color values, in 0-255 range, of the decomposition of a pixel. This
 737  * is a slow routine and should only be used for initialization phase.
 738  *****************************************************************************/
 739 void vout_Pixel2RGB( vout_thread_t *p_vout, u32 i_pixel, int *pi_red, int *pi_green, int *pi_blue )
 740 {
 741     *pi_red =   i_pixel & p_vout->i_red_mask;
 742     *pi_green = i_pixel & p_vout->i_green_mask;
 743     *pi_blue =  i_pixel & p_vout->i_blue_mask;
 744 }
 745
 746 /* following functions are local */
 747
 748 /*****************************************************************************
 749  * BinaryLog: computes the base 2 log of a binary value
 750  *****************************************************************************
 751  * This functions is used by MaskToShift, to get a bit index from a binary
 752  * value.
 753  *****************************************************************************/
 754 static int BinaryLog(u32 i)
 755 {
 756     int i_log;
 757
 758     i_log = 0;
 759     if (i & 0xffff0000)
 760     {
 761         i_log = 16;
 762     }
 763     if (i & 0xff00ff00)
 764     {
 765         i_log += 8;
 766     }
 767     if (i & 0xf0f0f0f0)
 768     {
 769         i_log += 4;
 770     }
 771     if (i & 0xcccccccc)
 772     {
 773         i_log += 2;
 774     }
 775     if (i & 0xaaaaaaaa)
 776     {
 777         i_log++;
 778     }
 779     if (i != ((u32)1 << i_log))
 780     {
 781         intf_ErrMsg("internal error: binary log overflow\n");
 782     }
 783
 784     return( i_log );
 785 }
 786
 787 /*****************************************************************************
 788  * MaskToShift: transform a color mask into right and left shifts
 789  *****************************************************************************
 790  * This function is used for obtaining color shifts from masks.
 791  *****************************************************************************/
 792 static void MaskToShift( int *pi_left, int *pi_right, u32 i_mask )
 793 {
 794     u32 i_low, i_high;                 /* lower hand higher bits of the mask */
 795
 796     /* Get bits */
 797     i_low =  i_mask & (- i_mask);                   /* lower bit of the mask */
 798     i_high = i_mask + i_low;                       /* higher bit of the mask */
 799
 800     /* Transform bits into an index */
 801     i_low =  BinaryLog (i_low);
 802     i_high = BinaryLog (i_high);
 803
 804     /* Update pointers and return */
 805     *pi_left =   i_low;
 806     *pi_right = (8 - i_high + i_low);
 807 }
 808
 809 /******************************************************************************
 810  * InitThread: initialize video output thread
 811  ******************************************************************************
 812  * This function is called from RunThread and performs the second step of the
 813  * initialization. It returns 0 on success. Note that the thread's flag are not
 814  * modified inside this function.
 815  ******************************************************************************/
 816 static int InitThread( vout_thread_t *p_vout )
 817 {
 818     /* Update status */
 819     intf_DbgMsg("\n");
 820     *p_vout->pi_status = THREAD_START;
 821
 822     /* Initialize output method - this function issues its own error messages */
 823     if( vout_SysInit( p_vout ) )
 824     {
 825         return( 1 );
 826     }
 827
 828     /* Initialize convertion tables and functions */
 829     if( vout_InitYUV( p_vout ) )
 830     {
 831         intf_ErrMsg("error: can't allocate YUV translation tables\n");
 832         return( 1 );
 833     }
 834
 835     /* Mark thread as running and return */
 836     p_vout->b_active =          1;
 837     *p_vout->pi_status =        THREAD_READY;
 838     intf_DbgMsg("thread ready\n");
 839     return( 0 );
 840 }
 841
 842 /******************************************************************************
 843  * RunThread: video output thread
 844  ******************************************************************************
 845  * Video output thread. This function does only returns when the thread is
 846  * terminated. It handles the pictures arriving in the video heap and the
 847  * display device events.
 848  ******************************************************************************/
 849 static void RunThread( vout_thread_t *p_vout)
 850 {
 851     int             i_index;                                 /* index in heap */
 852     mtime_t         current_date;                             /* current date */
 853     mtime_t         display_date;                             /* display date */
 854     boolean_t       b_display;                                /* display flag */
 855     picture_t *     p_pic;                                 /* picture pointer */
 856     subpicture_t *  p_subpic;                           /* subpicture pointer */
 857
 858     /*
 859      * Initialize thread
 860      */
 861     p_vout->b_error = InitThread( p_vout );
 862     if( p_vout->b_error )
 863     {
 864         DestroyThread( p_vout, THREAD_ERROR );
 865         return;
 866     }
 867     intf_DbgMsg("\n");
 868
 869     /*
 870      * Main loop - it is not executed if an error occured during
 871      * initialization
 872      */
 873     while( (!p_vout->b_die) && (!p_vout->b_error) )
 874     {
 875         /* Initialize loop variables */
 876         p_pic =         NULL;
 877         p_subpic =      NULL;
 878         display_date =  0;
 879         current_date =  mdate();
 880
 881         /*
 882          * Find the picture to display - this operation does not need lock,
 883          * since only READY_PICTUREs are handled
 884          */
 885         for( i_index = 0; i_index < VOUT_MAX_PICTURES; i_index++ )
 886         {
 887             if( (p_vout->p_picture[i_index].i_status == READY_PICTURE) &&
 888                 ( (p_pic == NULL) ||
 889                   (p_vout->p_picture[i_index].date < display_date) ) )
 890             {
 891                 p_pic = &p_vout->p_picture[i_index];
 892                 display_date = p_pic->date;
 893             }
 894         }
 895
 896         if( p_pic )
 897         {
 898 #ifdef STATS
 899             /* Computes FPS rate */
 900             p_vout->p_fps_sample[ p_vout->c_fps_samples++ % VOUT_FPS_SAMPLES ] = display_date;
 901 #endif
 902             if( display_date < current_date )
 903             {
 904                 /* Picture is late: it will be destroyed and the thread will sleep and
 905                  * go to next picture */
 906                 vlc_mutex_lock( &p_vout->picture_lock );
 907                 p_pic->i_status = p_pic->i_refcount ? DISPLAYED_PICTURE : DESTROYED_PICTURE;
 908                 intf_DbgMsg( "warning: late picture %p skipped refcount=%d\n", p_pic, p_pic->i_refcount );
 909                 vlc_mutex_unlock( &p_vout->picture_lock );
 910                 p_pic =         NULL;
 911                 display_date =  0;
 912             }
 913             else if( display_date > current_date + VOUT_DISPLAY_DELAY )
 914             {
 915                 /* A picture is ready to be rendered, but its rendering date is
 916                  * far from the current one so the thread will perform an empty loop
 917                  * as if no picture were found. The picture state is unchanged */
 918                 p_pic =         NULL;
 919                 display_date =  0;
 920             }
 921         }
 922
 923         /*
 924          * Find the subpicture to display - this operation does not need lock, since
 925          * only READY_SUBPICTURES are handled. If no picture has been selected,
 926          * display_date will depend on the subpicture
 927          */
 928         //??
 929
 930         /*
 931          * Perform rendering, sleep and display rendered picture
 932          */
 933         if( p_pic )                          /* picture and perhaps subpicture */
 934         {
 935             b_display = p_vout->b_active;
 936             p_vout->last_display_date = display_date;
 937
 938             if( b_display )
 939             {
 940                 /* Set picture dimensions and clear buffer */
 941                 SetBufferPicture( p_vout, p_pic );
 942
 943                 /* Render picture and informations */
 944                 RenderPicture( p_vout, p_pic );
 945                 if( p_vout->b_info )
 946                 {
 947                     RenderPictureInfo( p_vout, p_pic );
 948                     RenderInfo( p_vout );
 949                 }
 950             }
 951
 952             /* Remove picture from heap */
 953             vlc_mutex_lock( &p_vout->picture_lock );
 954             p_pic->i_status = p_pic->i_refcount ? DISPLAYED_PICTURE : DESTROYED_PICTURE;
 955             vlc_mutex_unlock( &p_vout->picture_lock );
 956
 957             /* Render interface and subpicture */
 958             if( b_display && p_vout->b_interface )
 959             {
 960                 RenderInterface( p_vout );
 961             }
 962             if( p_subpic )
 963             {
 964                 if( b_display )
 965                 {
 966                     RenderSubPicture( p_vout, p_subpic );
 967                 }
 968
 969                 /* Remove subpicture from heap */
 970                 vlc_mutex_lock( &p_vout->subpicture_lock );
 971                 p_subpic->i_status = DESTROYED_SUBPICTURE;
 972                 vlc_mutex_unlock( &p_vout->subpicture_lock );
 973             }
 974
 975         }
 976         else if( p_subpic )                                /* subpicture alone */
 977         {
 978             b_display = p_vout->b_active;
 979             p_vout->last_display_date = display_date;
 980
 981             if( b_display )
 982             {
 983                 /* Clear buffer */
 984                 SetBufferPicture( p_vout, NULL );
 985
 986                 /* Render informations, interface and subpicture */
 987                 if( p_vout->b_info )
 988                 {
 989                     RenderInfo( p_vout );
 990                 }
 991                 if( p_vout->b_interface )
 992                 {
 993                     RenderInterface( p_vout );
 994                 }
 995                 RenderSubPicture( p_vout, p_subpic );
 996             }
 997
 998             /* Remove subpicture from heap */
 999             vlc_mutex_lock( &p_vout->subpicture_lock );
1000             p_subpic->i_status = DESTROYED_SUBPICTURE;
1001             vlc_mutex_unlock( &p_vout->subpicture_lock );
1002         }
1003         else if( p_vout->b_active )          /* idle or interface screen alone */
1004         {
1005             if( p_vout->b_interface && 0 /* && ?? intf_change */ )
1006             {
1007                 /* Interface has changed, so a new rendering is required - force
1008                  * it by setting last idle date to 0 */
1009                 p_vout->last_idle_date = 0;
1010             }
1011
1012             /* Render idle screen and update idle date, then render interface if
1013              * required */
1014             b_display = RenderIdle( p_vout );
1015             if( b_display )
1016             {
1017                 p_vout->last_idle_date = current_date;
1018                 if( p_vout->b_interface )
1019                 {
1020                     RenderInterface( p_vout );
1021                 }
1022             }
1023
1024         }
1025         else
1026         {
1027             b_display = 0;
1028         }
1029
1030         /*
1031          * Sleep, wake up and display rendered picture
1032          */
1033
1034 #ifdef STATS
1035         /* Store render time */
1036         p_vout->render_time = mdate() - current_date;
1037 #endif
1038
1039         /* Give back change lock */
1040         vlc_mutex_unlock( &p_vout->change_lock );
1041
1042         /* Sleep a while or until a given date */
1043         if( display_date != 0 )
1044         {
1045             mwait( display_date );
1046         }
1047         else
1048         {
1049             msleep( VOUT_IDLE_SLEEP );
1050         }
1051
1052         /* On awakening, take back lock and send immediately picture to display,
1053          * then swap buffers */
1054         vlc_mutex_lock( &p_vout->change_lock );
1055 #ifdef DEBUG_VIDEO
1056         intf_DbgMsg( "picture %p, subpicture %p in buffer %d, display=%d\n", p_pic, p_subpic,
1057                      p_vout->i_buffer_index, b_display && !(p_vout->i_changes & VOUT_NODISPLAY_CHANGE) );
1058 #endif
1059         if( b_display && !(p_vout->i_changes & VOUT_NODISPLAY_CHANGE) )
1060         {
1061             vout_SysDisplay( p_vout );
1062             p_vout->i_buffer_index = ++p_vout->i_buffer_index & 1;
1063         }
1064
1065         /*
1066          * Check events and manage thread
1067          */
1068         if( vout_SysManage( p_vout ) | Manage( p_vout ) )
1069         {
1070             /* A fatal error occured, and the thread must terminate immediately,
1071              * without displaying anything - setting b_error to 1 cause the
1072              * immediate end of the main while() loop. */
1073             p_vout->b_error = 1;
1074         }
1075     }
1076
1077     /*
1078      * Error loop - wait until the thread destruction is requested
1079      */
1080     if( p_vout->b_error )
1081     {
1082         ErrorThread( p_vout );
1083     }
1084
1085     /* End of thread */
1086     EndThread( p_vout );
1087     DestroyThread( p_vout, THREAD_OVER );
1088     intf_DbgMsg( "thread end\n" );
1089 }
1090
1091 /******************************************************************************
1092  * ErrorThread: RunThread() error loop
1093  ******************************************************************************
1094  * This function is called when an error occured during thread main's loop. The
1095  * thread can still receive feed, but must be ready to terminate as soon as
1096  * possible.
1097  ******************************************************************************/
1098 static void ErrorThread( vout_thread_t *p_vout )
1099 {
1100     /* Wait until a `die' order */
1101     intf_DbgMsg("\n");
1102     while( !p_vout->b_die )
1103     {
1104         /* Sleep a while */
1105         msleep( VOUT_IDLE_SLEEP );
1106     }
1107 }
1108
1109 /*******************************************************************************
1110  * EndThread: thread destruction
1111  *******************************************************************************
1112  * This function is called when the thread ends after a sucessfull
1113  * initialization. It frees all ressources allocated by InitThread.
1114  *******************************************************************************/
1115 static void EndThread( vout_thread_t *p_vout )
1116 {
1117     int     i_index;                                          /* index in heap */
1118
1119     /* Store status */
1120     intf_DbgMsg("\n");
1121     *p_vout->pi_status = THREAD_END;
1122
1123     /* Destroy all remaining pictures and subpictures */
1124     for( i_index = 0; i_index < VOUT_MAX_PICTURES; i_index++ )
1125     {
1126         if( p_vout->p_picture[i_index].i_status != FREE_PICTURE )
1127         {
1128             free( p_vout->p_picture[i_index].p_data );
1129         }
1130         if( p_vout->p_subpicture[i_index].i_status != FREE_SUBPICTURE )
1131         {
1132             free( p_vout->p_subpicture[i_index].p_data );
1133         }
1134     }
1135
1136     /* Destroy translation tables */
1137     vout_EndYUV( p_vout );
1138     vout_SysEnd( p_vout );
1139 }
1140
1141 /*******************************************************************************
1142  * DestroyThread: thread destruction
1143  *******************************************************************************
1144  * This function is called when the thread ends. It frees all ressources
1145  * allocated by CreateThread. Status is available at this stage.
1146  *******************************************************************************/
1147 static void DestroyThread( vout_thread_t *p_vout, int i_status )
1148 {
1149     int *pi_status;                                           /* status adress */
1150
1151     /* Store status adress */
1152     intf_DbgMsg("\n");
1153     pi_status = p_vout->pi_status;
1154
1155     /* Destroy thread structures allocated by Create and InitThread */
1156     vout_UnloadFont( p_vout->p_default_font );
1157     vout_UnloadFont( p_vout->p_large_font );
1158     vout_SysDestroy( p_vout );
1159     free( p_vout );
1160     *pi_status = i_status;
1161 }
1162
1163 /*******************************************************************************
1164  * Print: print simple text on a picture
1165  *******************************************************************************
1166  * This function will print a simple text on the picture. It is designed to
1167  * print debugging or general informations.
1168  *******************************************************************************/
1169 void Print( vout_thread_t *p_vout, int i_x, int i_y, int i_h_align, int i_v_align, unsigned char *psz_text )
1170 {
1171     int                 i_text_height;                    /* total text height */
1172     int                 i_text_width;                      /* total text width */
1173
1174     /* Update upper left coordinates according to alignment */
1175     vout_TextSize( p_vout->p_default_font, 0, psz_text, &i_text_width, &i_text_height );
1176     if( !Align( p_vout, &i_x, &i_y, i_text_width, i_text_height, i_h_align, i_v_align ) )
1177     {
1178         /* Set area and print text */
1179         SetBufferArea( p_vout, i_x, i_y, i_text_width, i_text_height );
1180         vout_Print( p_vout->p_default_font, p_vout->p_buffer[ p_vout->i_buffer_index ].p_data +
1181                     i_y * p_vout->i_bytes_per_line + i_x * p_vout->i_bytes_per_pixel,
1182                     p_vout->i_bytes_per_pixel, p_vout->i_bytes_per_line,
1183                     p_vout->i_white_pixel, 0, 0,
1184                     0, psz_text );
1185     }
1186 }
1187
1188 /*******************************************************************************
1189  * SetBufferArea: activate an area in current buffer
1190  *******************************************************************************
1191  * This function is called when something is rendered on the current buffer.
1192  * It set the area as active and prepare it to be cleared on next rendering.
1193  * Pay attention to the fact that in this functions, i_h is in fact the end y
1194  * coordinate of the new area.
1195  *******************************************************************************/
1196 static void SetBufferArea( vout_thread_t *p_vout, int i_x, int i_y, int i_w, int i_h )
1197 {
1198     vout_buffer_t *     p_buffer;                            /* current buffer */
1199     int                 i_area_begin, i_area_end;   /* area vertical extension */
1200     int                 i_area, i_area_copy;                     /* area index */
1201     int                 i_area_shift;              /* shift distance for areas */
1202
1203     /* Choose buffer and modify h to end of area position */
1204     p_buffer =  &p_vout->p_buffer[ p_vout->i_buffer_index ];
1205     i_h +=      i_y - 1;
1206
1207     /*
1208      * Remove part of the area which is inside the picture - this is done
1209      * by calling again SetBufferArea with the correct areas dimensions.
1210      */
1211     if( (i_x >= p_buffer->i_pic_x) && (i_x + i_w <= p_buffer->i_pic_x + p_buffer->i_pic_width) )
1212     {
1213         i_area_begin =  p_buffer->i_pic_y;
1214         i_area_end =    i_area_begin + p_buffer->i_pic_height - 1;
1215
1216         if( ((i_y >= i_area_begin) && (i_y <= i_area_end)) ||
1217             ((i_h >= i_area_begin) && (i_h <= i_area_end)) ||
1218             ((i_y <  i_area_begin) && (i_h > i_area_end)) )
1219         {
1220             /* Keep the stripe above the picture, if any */
1221             if( i_y < i_area_begin )
1222             {
1223                 SetBufferArea( p_vout, i_x, i_y, i_w, i_area_begin - i_y );
1224             }
1225             /* Keep the stripe below the picture, if any */
1226             if( i_h > i_area_end )
1227             {
1228                 SetBufferArea( p_vout, i_x, i_area_end, i_w, i_h - i_area_end );
1229             }
1230             return;
1231         }
1232     }
1233
1234     /* Skip some extensions until interesting areas */
1235     for( i_area = 0;
1236          (i_area < p_buffer->i_areas) &&
1237              (p_buffer->pi_area_end[i_area] + 1 <= i_y);
1238          i_area++ )
1239     {
1240         ;
1241     }
1242
1243     if( i_area == p_buffer->i_areas )
1244     {
1245         /* New area is below all existing ones: just add it at the end of the
1246          * array, if possible - else, append it to the last one */
1247         if( i_area < VOUT_MAX_AREAS )
1248         {
1249             p_buffer->pi_area_begin[i_area] = i_y;
1250             p_buffer->pi_area_end[i_area] = i_h;
1251             p_buffer->i_areas++;
1252         }
1253         else
1254         {
1255 #ifdef DEBUG_VIDEO
1256             intf_DbgMsg("areas overflow\n");
1257 #endif
1258             p_buffer->pi_area_end[VOUT_MAX_AREAS - 1] = i_h;
1259         }
1260     }
1261     else
1262     {
1263         i_area_begin =  p_buffer->pi_area_begin[i_area];
1264         i_area_end =    p_buffer->pi_area_end[i_area];
1265
1266         if( i_y < i_area_begin )
1267         {
1268             if( i_h >= i_area_begin - 1 )
1269             {
1270                 /* Extend area above */
1271                 p_buffer->pi_area_begin[i_area] = i_y;
1272             }
1273             else
1274             {
1275                 /* Create a new area above : merge last area if overflow, then
1276                  * move all old areas down */
1277                 if( p_buffer->i_areas == VOUT_MAX_AREAS )
1278                 {
1279 #ifdef DEBUG_VIDEO
1280                     intf_DbgMsg("areas overflow\n");
1281 #endif
1282                     p_buffer->pi_area_end[VOUT_MAX_AREAS - 2] = p_buffer->pi_area_end[VOUT_MAX_AREAS - 1];
1283                 }
1284                 else
1285                 {
1286                     p_buffer->i_areas++;
1287                 }
1288                 for( i_area_copy = p_buffer->i_areas - 1; i_area_copy > i_area; i_area_copy-- )
1289                 {
1290                     p_buffer->pi_area_begin[i_area_copy] = p_buffer->pi_area_begin[i_area_copy - 1];
1291                     p_buffer->pi_area_end[i_area_copy] =   p_buffer->pi_area_end[i_area_copy - 1];
1292                 }
1293                 p_buffer->pi_area_begin[i_area] = i_y;
1294                 p_buffer->pi_area_end[i_area] = i_h;
1295                 return;
1296             }
1297         }
1298         if( i_h > i_area_end )
1299         {
1300             /* Find further areas which can be merged with the new one */
1301             for( i_area_copy = i_area + 1;
1302                  (i_area_copy < p_buffer->i_areas) &&
1303                      (p_buffer->pi_area_begin[i_area] <= i_h);
1304                  i_area_copy++ )
1305             {
1306                 ;
1307             }
1308             i_area_copy--;
1309
1310             if( i_area_copy != i_area )
1311             {
1312                 /* Merge with last possible areas */
1313                 p_buffer->pi_area_end[i_area] = MAX( i_h, p_buffer->pi_area_end[i_area_copy] );
1314
1315                 /* Shift lower areas upward */
1316                 i_area_shift = i_area_copy - i_area;
1317                 p_buffer->i_areas -= i_area_shift;
1318                 for( i_area_copy = i_area + 1; i_area_copy < p_buffer->i_areas; i_area_copy++ )
1319                 {
1320                     p_buffer->pi_area_begin[i_area_copy] = p_buffer->pi_area_begin[i_area_copy + i_area_shift];
1321                     p_buffer->pi_area_end[i_area_copy] =   p_buffer->pi_area_end[i_area_copy + i_area_shift];
1322                 }
1323             }
1324             else
1325             {
1326                 /* Extend area below */
1327                 p_buffer->pi_area_end[i_area] = i_h;
1328             }
1329         }
1330     }
1331 }
1332
1333 /*******************************************************************************
1334  * SetBufferPicture: clear buffer and set picture area
1335  *******************************************************************************
1336  * This function is called before any rendering. It clears the current
1337  * rendering buffer and set the new picture area. If the picture pointer is
1338  * NULL, then no picture area is defined. Floating operations are avoided since
1339  * some MMX calculations may follow.
1340  *******************************************************************************/
1341 static void SetBufferPicture( vout_thread_t *p_vout, picture_t *p_pic )
1342 {
1343     vout_buffer_t *     p_buffer;                            /* current buffer */
1344     int                 i_pic_x, i_pic_y;                  /* picture position */
1345     int                 i_pic_width, i_pic_height;       /* picture dimensions */
1346     int                 i_old_pic_y, i_old_pic_height;     /* old picture area */
1347     int                 i_vout_width, i_vout_height;     /* display dimensions */
1348     int                 i_area;                                  /* area index */
1349     int                 i_data_index;                       /* area data index */
1350     int                 i_data_size;     /* area data size, in 256 bytes blocs */
1351     u64 *               p_data;                     /* area data, for clearing */
1352     byte_t *            p_data8;             /* area data, for clearing (slow) */
1353
1354     /* Choose buffer and set display dimensions */
1355     p_buffer =          &p_vout->p_buffer[ p_vout->i_buffer_index ];
1356     i_vout_width =      p_vout->i_width;
1357     i_vout_height =     p_vout->i_height;
1358
1359     /*
1360      * Computes new picture size
1361      */
1362     if( p_pic != NULL )
1363     {
1364         /* Try horizontal scaling first - width must be a mutiple of 16 */
1365         i_pic_width = (( p_vout->b_scale || (p_pic->i_width > i_vout_width)) ?
1366                        i_vout_width : p_pic->i_width) & ~0xf;
1367         switch( p_pic->i_aspect_ratio )
1368         {
1369         case AR_3_4_PICTURE:
1370             i_pic_height = i_pic_width * 3 / 4;
1371             break;
1372         case AR_16_9_PICTURE:
1373             i_pic_height = i_pic_width * 9 / 16;
1374             break;
1375         case AR_221_1_PICTURE:
1376             i_pic_height = i_pic_width * 100 / 221;
1377             break;
1378         case AR_SQUARE_PICTURE:
1379         default:
1380             i_pic_height = p_pic->i_height * i_pic_width / p_pic->i_width;
1381             break;
1382         }
1383
1384         /* If picture dimensions using horizontal scaling are too large, use
1385          * vertical scaling. Since width must be a multiple of 16, height is
1386          * adjusted again after. */
1387         if( i_pic_height > i_vout_height )
1388         {
1389             i_pic_height = ( p_vout->b_scale || (p_pic->i_height > i_vout_height)) ?
1390                 i_vout_height : p_pic->i_height;
1391             switch( p_pic->i_aspect_ratio )
1392             {
1393             case AR_3_4_PICTURE:
1394                 i_pic_width = (i_pic_height * 4 / 3) & ~0xf;
1395                 i_pic_height = i_pic_width * 3 / 4;
1396                 break;
1397             case AR_16_9_PICTURE:
1398                 i_pic_width = (i_pic_height * 16 / 9) & ~0xf;
1399                 i_pic_height = i_pic_width * 9 / 16;
1400                 break;
1401             case AR_221_1_PICTURE:
1402                 i_pic_width = (i_pic_height * 221 / 100) & ~0xf;
1403                 i_pic_height = i_pic_width * 100 / 221;
1404                 break;
1405             case AR_SQUARE_PICTURE:
1406             default:
1407                 i_pic_width = (p_pic->i_width * i_pic_height / p_pic->i_height) & ~0xf;
1408                 i_pic_height = p_pic->i_height * i_pic_width / p_pic->i_width;
1409                 break;
1410             }
1411         }
1412
1413         /* Set picture position */
1414         i_pic_x = (p_vout->i_width - i_pic_width) / 2;
1415         i_pic_y = (p_vout->i_height - i_pic_height) / 2;
1416     }
1417     else
1418     {
1419         /* No picture: size is 0 */
1420         i_pic_x =       0;
1421         i_pic_y =       0;
1422         i_pic_width =   0;
1423         i_pic_height =  0;
1424     }
1425
1426     /*
1427      * Set new picture size - if is is smaller than the previous one, clear
1428      * around it. Since picture are centered, only their size is tested.
1429      */
1430     if( (p_buffer->i_pic_width > i_pic_width) || (p_buffer->i_pic_height > i_pic_height) )
1431     {
1432         i_old_pic_y =            p_buffer->i_pic_y;
1433         i_old_pic_height =       p_buffer->i_pic_height;
1434         p_buffer->i_pic_x =      i_pic_x;
1435         p_buffer->i_pic_y =      i_pic_y;
1436         p_buffer->i_pic_width =  i_pic_width;
1437         p_buffer->i_pic_height = i_pic_height;
1438         SetBufferArea( p_vout, 0, i_old_pic_y, p_vout->i_width, i_old_pic_height );
1439     }
1440     else
1441     {
1442         p_buffer->i_pic_x =      i_pic_x;
1443         p_buffer->i_pic_y =      i_pic_y;
1444         p_buffer->i_pic_width =  i_pic_width;
1445         p_buffer->i_pic_height = i_pic_height;
1446     }
1447
1448     /*
1449      * Clear areas
1450      */
1451     for( i_area = 0; i_area < p_buffer->i_areas; i_area++ )
1452     {
1453 #ifdef DEBUG_VIDEO
1454         intf_DbgMsg("clearing picture %p area in buffer %d: %d-%d\n", p_pic,
1455                     p_vout->i_buffer_index, p_buffer->pi_area_begin[i_area], p_buffer->pi_area_end[i_area] );
1456 #endif
1457         i_data_size = (p_buffer->pi_area_end[i_area] - p_buffer->pi_area_begin[i_area] + 1) * p_vout->i_bytes_per_line;
1458         p_data = (u64*) (p_buffer->p_data + p_vout->i_bytes_per_line * p_buffer->pi_area_begin[i_area]);
1459         for( i_data_index = i_data_size / 256; i_data_index-- ; )
1460         {
1461             /* Clear 256 bytes block */
1462             *p_data++ = 0;  *p_data++ = 0;  *p_data++ = 0;  *p_data++ = 0;
1463             *p_data++ = 0;  *p_data++ = 0;  *p_data++ = 0;  *p_data++ = 0;
1464             *p_data++ = 0;  *p_data++ = 0;  *p_data++ = 0;  *p_data++ = 0;
1465             *p_data++ = 0;  *p_data++ = 0;  *p_data++ = 0;  *p_data++ = 0;
1466             *p_data++ = 0;  *p_data++ = 0;  *p_data++ = 0;  *p_data++ = 0;
1467             *p_data++ = 0;  *p_data++ = 0;  *p_data++ = 0;  *p_data++ = 0;
1468             *p_data++ = 0;  *p_data++ = 0;  *p_data++ = 0;  *p_data++ = 0;
1469             *p_data++ = 0;  *p_data++ = 0;  *p_data++ = 0;  *p_data++ = 0;
1470         }
1471         for( i_data_index = (i_data_size % 256) / 16; i_data_index--; )
1472         {
1473             /* Clear remaining 16 bytes blocks */
1474             *p_data++ = 0;  *p_data++ = 0;
1475         }
1476         p_data8 = (byte_t *)p_data;
1477         for( i_data_index = i_data_size % 16; i_data_index--; )
1478         {
1479             /* Clear remaining bytes */
1480             *p_data8++ = 0;
1481         }
1482     }
1483
1484     /*
1485      * Clear areas array
1486      */
1487     p_buffer->i_areas = 0;
1488 }
1489
1490 /******************************************************************************
1491  * RenderPicture: render a picture
1492  ******************************************************************************
1493  * This function convert a picture from a video heap to a pixel-encoded image
1494  * and copy it to the current rendering buffer. No lock is required, since the
1495  * rendered picture has been determined as existant, and will only be destroyed
1496  * by the vout thread later.
1497  ******************************************************************************/
1498 static void RenderPicture( vout_thread_t *p_vout, picture_t *p_pic )
1499 {
1500 #ifdef DEBUG_VIDEO
1501     char                psz_date[MSTRTIME_MAX_SIZE];          /* picture date */
1502     mtime_t             render_time;                /* picture rendering time */
1503 #endif
1504     vout_buffer_t *     p_buffer;                         /* rendering buffer */
1505     byte_t *            p_pic_data;                 /* convertion destination */
1506
1507     /* Get and set rendering informations */
1508     p_buffer =          &p_vout->p_buffer[ p_vout->i_buffer_index ];
1509     p_pic_data =        p_buffer->p_data +
1510         p_buffer->i_pic_x * p_vout->i_bytes_per_pixel +
1511         p_buffer->i_pic_y * p_vout->i_bytes_per_line;
1512 #ifdef DEBUG_VIDEO
1513     render_time = mdate();
1514 #endif
1515
1516     /*
1517      * Choose appropriate rendering function and render picture
1518      */
1519     switch( p_pic->i_type )
1520     {
1521     case YUV_420_PICTURE:
1522         p_vout->yuv.p_Convert420( p_vout, p_pic_data,
1523                                   p_pic->p_y, p_pic->p_u, p_pic->p_v,
1524                                   p_pic->i_width, p_pic->i_height,
1525                                   p_buffer->i_pic_width, p_buffer->i_pic_height,
1526                                   p_vout->i_bytes_per_line / p_vout->i_bytes_per_pixel,
1527                                   p_pic->i_matrix_coefficients );
1528         break;
1529     case YUV_422_PICTURE:
1530         p_vout->yuv.p_Convert422( p_vout, p_pic_data,
1531                                   p_pic->p_y, p_pic->p_u, p_pic->p_v,
1532                                   p_pic->i_width, p_pic->i_height,
1533                                   p_buffer->i_pic_width, p_buffer->i_pic_height,
1534                                   p_vout->i_bytes_per_line / p_vout->i_bytes_per_pixel,
1535                                   p_pic->i_matrix_coefficients );
1536         break;
1537     case YUV_444_PICTURE:
1538         p_vout->yuv.p_Convert444( p_vout, p_pic_data,
1539                                   p_pic->p_y, p_pic->p_u, p_pic->p_v,
1540                                   p_pic->i_width, p_pic->i_height,
1541                                   p_buffer->i_pic_width, p_buffer->i_pic_height,
1542                                   p_vout->i_bytes_per_line / p_vout->i_bytes_per_pixel,
1543                                   p_pic->i_matrix_coefficients );
1544         break;
1545 #ifdef DEBUG
1546     default:
1547         intf_DbgMsg("error: unknown picture type %d\n", p_pic->i_type );
1548         break;
1549 #endif
1550     }
1551
1552 #ifdef DEBUG_VIDEO
1553     /* Print picture date and rendering time */
1554     intf_DbgMsg("picture %p rendered in buffer %d (%ld us), display date: %s\n", p_pic,
1555                 p_vout->i_buffer_index, (long) (mdate() - render_time),
1556                 mstrtime( psz_date, p_pic->date ));
1557 #endif
1558 }
1559
1560 /******************************************************************************
1561  * RenderPictureInfo: print additionnal informations on a picture
1562  ******************************************************************************
1563  * This function will print informations such as fps and other picture
1564  * dependant informations.
1565  ******************************************************************************/
1566 static void RenderPictureInfo( vout_thread_t *p_vout, picture_t *p_pic )
1567 {
1568 #if defined(STATS) || defined(DEBUG)
1569     char        psz_buffer[256];                             /* string buffer */
1570 #endif
1571
1572 #ifdef STATS
1573     /*
1574      * Print FPS rate in upper right corner
1575      */
1576     if( p_vout->c_fps_samples > VOUT_FPS_SAMPLES )
1577     {
1578         sprintf( psz_buffer, "%.2f fps", (double) VOUT_FPS_SAMPLES * 1000000 /
1579                  ( p_vout->p_fps_sample[ (p_vout->c_fps_samples - 1) % VOUT_FPS_SAMPLES ] -
1580                    p_vout->p_fps_sample[ p_vout->c_fps_samples % VOUT_FPS_SAMPLES ] ) );
1581         Print( p_vout, 0, 0, RIGHT_RALIGN, TOP_RALIGN, psz_buffer );
1582     }
1583
1584     /*
1585      * Print frames count and loop time in upper left corner
1586      */
1587     sprintf( psz_buffer, "%ld frames   rendering: %ld us",
1588              (long) p_vout->c_fps_samples, (long) p_vout->render_time );
1589     Print( p_vout, 0, 0, LEFT_RALIGN, TOP_RALIGN, psz_buffer );
1590 #endif
1591
1592 #ifdef DEBUG
1593     /*
1594      * Print picture information in lower right corner
1595      */
1596     sprintf( psz_buffer, "%s picture %dx%d (%dx%d%+d%+d %s) -> %dx%d+%d+%d",
1597              (p_pic->i_type == YUV_420_PICTURE) ? "4:2:0" :
1598              ((p_pic->i_type == YUV_422_PICTURE) ? "4:2:2" :
1599               ((p_pic->i_type == YUV_444_PICTURE) ? "4:4:4" : "ukn-type")),
1600              p_pic->i_width, p_pic->i_height,
1601              p_pic->i_display_width, p_pic->i_display_height,
1602              p_pic->i_display_horizontal_offset, p_pic->i_display_vertical_offset,
1603              (p_pic->i_aspect_ratio == AR_SQUARE_PICTURE) ? "sq" :
1604              ((p_pic->i_aspect_ratio == AR_3_4_PICTURE) ? "4:3" :
1605               ((p_pic->i_aspect_ratio == AR_16_9_PICTURE) ? "16:9" :
1606                ((p_pic->i_aspect_ratio == AR_221_1_PICTURE) ? "2.21:1" : "ukn-ar" ))),
1607              p_vout->p_buffer[ p_vout->i_buffer_index ].i_pic_width,
1608              p_vout->p_buffer[ p_vout->i_buffer_index ].i_pic_height,
1609              p_vout->p_buffer[ p_vout->i_buffer_index ].i_pic_x,
1610              p_vout->p_buffer[ p_vout->i_buffer_index ].i_pic_y );
1611     Print( p_vout, 0, 0, RIGHT_RALIGN, BOTTOM_RALIGN, psz_buffer );
1612 #endif
1613 }
1614
1615 /******************************************************************************
1616  * RenderIdle: render idle picture
1617  ******************************************************************************
1618  * This function will print something on the screen. It will return 0 if
1619  * nothing has been rendered, or 1 if something has been changed on the screen.
1620  * Note that if you absolutely want something to be printed, you will have
1621  * to force it by setting the last idle date to 0.
1622  * Unlike other rendering functions, this one calls the SetBufferPicture
1623  * function when needed.
1624  ******************************************************************************/
1625 static int RenderIdle( vout_thread_t *p_vout )
1626 {
1627     int         i_x = 0, i_y = 0;                            /* text position */
1628     int         i_width, i_height;                               /* text size */
1629     mtime_t     current_date;                                 /* current date */
1630     const char *psz_text = "no stream";                    /* text to display */
1631
1632
1633     current_date = mdate();
1634     if( (current_date - p_vout->last_display_date) > VOUT_IDLE_DELAY &&
1635         (current_date - p_vout->last_idle_date) > VOUT_IDLE_DELAY )
1636     {
1637         SetBufferPicture( p_vout, NULL );
1638         vout_TextSize( p_vout->p_large_font, WIDE_TEXT | OUTLINED_TEXT, psz_text,
1639                        &i_width, &i_height );
1640         if( !Align( p_vout, &i_x, &i_y, i_width, i_height, CENTER_RALIGN, CENTER_RALIGN ) )
1641         {
1642             vout_Print( p_vout->p_large_font,
1643                         p_vout->p_buffer[ p_vout->i_buffer_index ].p_data +
1644                         i_x * p_vout->i_bytes_per_pixel + i_y * p_vout->i_bytes_per_line,
1645                         p_vout->i_bytes_per_pixel, p_vout->i_bytes_per_line,
1646                         p_vout->i_white_pixel, p_vout->i_gray_pixel, 0,
1647                         WIDE_TEXT | OUTLINED_TEXT, psz_text );
1648             SetBufferArea( p_vout, i_x, i_y, i_width, i_height );
1649         }
1650         return( 1 );
1651     }
1652     return( 0 );
1653 }
1654
1655 /******************************************************************************
1656  * RenderInfo: render additionnal informations
1657  ******************************************************************************
1658  * This function render informations which do not depend of the current picture
1659  * rendered.
1660  ******************************************************************************/
1661 static void RenderInfo( vout_thread_t *p_vout )
1662 {
1663 #ifdef DEBUG
1664     char        psz_buffer[256];                             /* string buffer */
1665     int         i_ready_pic = 0;                            /* ready pictures */
1666     int         i_reserved_pic = 0;                      /* reserved pictures */
1667     int         i_picture;                                   /* picture index */
1668 #endif
1669
1670 #ifdef DEBUG
1671     /*
1672      * Print thread state in lower left corner
1673      */
1674     for( i_picture = 0; i_picture < VOUT_MAX_PICTURES; i_picture++ )
1675     {
1676         switch( p_vout->p_picture[i_picture].i_status )
1677         {
1678         case RESERVED_PICTURE:
1679         case RESERVED_DATED_PICTURE:
1680         case RESERVED_DISP_PICTURE:
1681             i_reserved_pic++;
1682             break;
1683         case READY_PICTURE:
1684             i_ready_pic++;
1685             break;
1686         }
1687     }
1688     sprintf( psz_buffer, "pic: %d/%d/%d",
1689              i_reserved_pic, i_ready_pic, VOUT_MAX_PICTURES );
1690     Print( p_vout, 0, 0, LEFT_RALIGN, BOTTOM_RALIGN, psz_buffer );
1691 #endif
1692 }
1693
1694 /*******************************************************************************
1695  * RenderSubPicture: render a subpicture
1696  *******************************************************************************
1697  * This function render a sub picture unit.
1698  *******************************************************************************/
1699 static void RenderSubPicture( vout_thread_t *p_vout, subpicture_t *p_subpic )
1700 {
1701     p_vout_font_t       p_font;                                   /* text font */
1702     int                 i_width, i_height;            /* subpicture dimensions */
1703
1704     switch( p_subpic->i_type )
1705     {
1706     case TEXT_SUBPICTURE:                                  /* single line text */
1707         /* Select default font if not specified */
1708         p_font = p_subpic->type.text.p_font;
1709         if( p_font == NULL )
1710         {
1711             p_font = p_vout->p_default_font;
1712         }
1713
1714         /* Computes text size (width and height fields are ignored) and print it */
1715         vout_TextSize( p_font, p_subpic->type.text.i_style, p_subpic->p_data, &i_width, &i_height );
1716         if( !Align( p_vout, &p_subpic->i_x, &p_subpic->i_y, i_width, i_height,
1717                     p_subpic->i_horizontal_align, p_subpic->i_vertical_align ) )
1718         {
1719             vout_Print( p_font, p_vout->p_buffer[ p_vout->i_buffer_index ].p_data +
1720                         p_subpic->i_x * p_vout->i_bytes_per_pixel +
1721                         p_subpic->i_y * p_vout->i_bytes_per_line,
1722                         p_vout->i_bytes_per_pixel, p_vout->i_bytes_per_line,
1723                         p_subpic->type.text.i_char_color, p_subpic->type.text.i_border_color,
1724                         p_subpic->type.text.i_bg_color, p_subpic->type.text.i_style,
1725                         p_subpic->p_data );
1726             SetBufferArea( p_vout, p_subpic->i_x, p_subpic->i_y, i_width, i_height );
1727         }
1728         break;
1729
1730 #ifdef DEBUG
1731     default:
1732         intf_DbgMsg("error: unknown subpicture %p type %d\n", p_subpic, p_subpic->i_type );
1733 #endif
1734     }
1735 }
1736
1737 /*******************************************************************************
1738  * RenderInterface: render the interface
1739  *******************************************************************************
1740  * This function render the interface, if any.
1741  *******************************************************************************/
1742 static void RenderInterface( vout_thread_t *p_vout )
1743 {
1744     int         i_height, i_text_height;              /* total and text height */
1745     int         i_width_1, i_width_2;                            /* text width */
1746     int         i_byte;                                          /* byte index */
1747     const char *psz_text_1 = "[1-9] Channel   [i]nfo   [c]olor     [g/G]amma";
1748     const char *psz_text_2 = "[+/-] Volume    [m]ute   [s]caling   [Q]uit";
1749
1750     /* Get text size */
1751     vout_TextSize( p_vout->p_large_font, OUTLINED_TEXT, psz_text_1, &i_width_1, &i_height );
1752     vout_TextSize( p_vout->p_large_font, OUTLINED_TEXT, psz_text_2, &i_width_2, &i_text_height );
1753     i_height += i_text_height;
1754
1755     /* Render background */
1756     for( i_byte = (p_vout->i_height - i_height) * p_vout->i_bytes_per_line;
1757          i_byte < p_vout->i_height * p_vout->i_bytes_per_line;
1758          i_byte++ )
1759     {
1760         //?? noooo !
1761         p_vout->p_buffer[ p_vout->i_buffer_index ].p_data[ i_byte ] = p_vout->i_blue_pixel;
1762     }
1763
1764     /* Render text, if not larger than screen */
1765     if( i_width_1 < p_vout->i_width )
1766     {
1767         vout_Print( p_vout->p_large_font, p_vout->p_buffer[ p_vout->i_buffer_index ].p_data +
1768                     (p_vout->i_height - i_height) * p_vout->i_bytes_per_line,
1769                     p_vout->i_bytes_per_pixel, p_vout->i_bytes_per_line,
1770                     p_vout->i_white_pixel, p_vout->i_black_pixel, 0,
1771                     OUTLINED_TEXT, psz_text_1 );
1772     }
1773     if( i_width_2 < p_vout->i_width )
1774     {
1775         vout_Print( p_vout->p_large_font, p_vout->p_buffer[ p_vout->i_buffer_index ].p_data +
1776                     (p_vout->i_height - i_height + i_text_height) * p_vout->i_bytes_per_line,
1777                     p_vout->i_bytes_per_pixel, p_vout->i_bytes_per_line,
1778                     p_vout->i_white_pixel, p_vout->i_black_pixel, 0,
1779                     OUTLINED_TEXT, psz_text_2 );
1780     }
1781
1782     /* Activate modified area */
1783     SetBufferArea( p_vout, 0, p_vout->i_height - i_height, p_vout->i_width, i_height );
1784 }
1785
1786 /******************************************************************************
1787  * Manage: manage thread
1788  ******************************************************************************
1789  * This function will handle changes in thread configuration.
1790  ******************************************************************************/
1791 static int Manage( vout_thread_t *p_vout )
1792 {
1793 #ifdef DEBUG_VIDEO
1794     if( p_vout->i_changes )
1795     {
1796         intf_DbgMsg("changes: 0x%x (no display: 0x%x)\n", p_vout->i_changes,
1797                     p_vout->i_changes & VOUT_NODISPLAY_CHANGE );
1798     }
1799 #endif
1800
1801     /* On gamma or grayscale change, rebuild tables */
1802     if( p_vout->i_changes & (VOUT_GAMMA_CHANGE | VOUT_GRAYSCALE_CHANGE |
1803                              VOUT_YUV_CHANGE) )
1804     {
1805         if( vout_ResetYUV( p_vout ) )
1806         {
1807             intf_ErrMsg("error: can't rebuild convertion tables\n");
1808             return( 1 );
1809         }
1810     }
1811
1812     /* Clear changes flags which does not need management or have been
1813      * handled */
1814     p_vout->i_changes &= ~(VOUT_GAMMA_CHANGE | VOUT_GRAYSCALE_CHANGE |
1815                            VOUT_YUV_CHANGE   | VOUT_INFO_CHANGE |
1816                            VOUT_INTF_CHANGE  | VOUT_SCALE_CHANGE );
1817
1818     /* Detect unauthorized changes */
1819     if( p_vout->i_changes )
1820     {
1821         /* Some changes were not acknowledged by vout_SysManage or this function,
1822          * it means they should not be authorized */
1823         intf_ErrMsg( "error: unauthorized changes in the video output thread\n" );
1824         return( 1 );
1825     }
1826
1827     return( 0 );
1828 }
1829
1830 /******************************************************************************
1831  * Align: align a subpicture in the screen
1832  ******************************************************************************
1833  * This function is used for rendering text or subpictures. It returns non 0
1834  * it the final aera is not fully included in display area. Return coordinates
1835  * are absolute.
1836  ******************************************************************************/
1837 static int Align( vout_thread_t *p_vout, int *pi_x, int *pi_y,
1838                    int i_width, int i_height, int i_h_align, int i_v_align )
1839 {
1840     /* Align horizontally */
1841     switch( i_h_align )
1842     {
1843     case CENTER_ALIGN:
1844         *pi_x -= i_width / 2;
1845         break;
1846     case CENTER_RALIGN:
1847         *pi_x += (p_vout->i_width - i_width) / 2;
1848         break;
1849     case RIGHT_ALIGN:
1850         *pi_x -= i_width;
1851         break;
1852     case RIGHT_RALIGN:
1853         *pi_x += p_vout->i_width - i_width;
1854         break;
1855     }
1856
1857     /* Align vertically */
1858     switch( i_v_align )
1859     {
1860     case CENTER_ALIGN:
1861         *pi_y -= i_height / 2;
1862         break;
1863     case CENTER_RALIGN:
1864         *pi_y += (p_vout->i_height - i_height) / 2;
1865         break;
1866     case BOTTOM_ALIGN:
1867         *pi_y -= i_height;
1868         break;
1869     case BOTTOM_RALIGN:
1870         *pi_y += p_vout->i_height - i_height;
1871         break;
1872     case SUBTITLE_RALIGN:
1873         *pi_y += (p_vout->i_height + p_vout->p_buffer[ p_vout->i_buffer_index ].i_pic_y +
1874                   p_vout->p_buffer[ p_vout->i_buffer_index ].i_pic_height - i_height) / 2;
1875         break;
1876     }
1877
1878     /* Return non 0 if clipping failed */
1879     return( (*pi_x < 0) || (*pi_y < 0) ||
1880             (*pi_x + i_width > p_vout->i_width) || (*pi_y + i_height > p_vout->i_height) );
1881 }
1882