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

   1 /*****************************************************************************
   2  * video_output.c : video output thread
   3  * This module describes the programming interface for video output threads.
   4  * It includes functions allowing to open a new thread, send pictures to a
   5  * thread, and destroy a previously oppened video output thread.
   6  *****************************************************************************
   7  * Copyright (C) 2000 VideoLAN
   8  *
   9  * Authors:
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation; either version 2 of the License, or
  14  * (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program; if not, write to the Free Software
  23  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
  24  *****************************************************************************/
  25
  26 /*****************************************************************************
  27  * Preamble
  28  *****************************************************************************/
  29 #include "defs.h"
  30
  31 #include <errno.h>                                                 /* ENOMEM */
  32 #include <stdlib.h>                                                /* free() */
  33 #include <stdio.h>                                              /* sprintf() */
  34 #include <string.h>                                            /* strerror() */
  35
  36 #include "config.h"
  37 #include "common.h"
  38 #include "threads.h"
  39 #include "mtime.h"
  40 #include "plugins.h"
  41 #include "video.h"
  42 #include "video_output.h"
  43 #include "video_text.h"
  44 #include "video_spu.h"
  45 #include "video_yuv.h"
  46
  47 #include "intf_msg.h"
  48 #include "main.h"
  49
  50 #include "vdec_idct.h"
  51 #include "video_decoder.h"
  52
  53 /*****************************************************************************
  54  * Local prototypes
  55  *****************************************************************************/
  56 static int      BinaryLog         ( u32 i );
  57 static void     MaskToShift       ( int *pi_left, int *pi_right, u32 i_mask );
  58 static int      InitThread        ( vout_thread_t *p_vout );
  59 static void     RunThread         ( vout_thread_t *p_vout );
  60 static void     ErrorThread       ( vout_thread_t *p_vout );
  61 static void     EndThread         ( vout_thread_t *p_vout );
  62 static void     DestroyThread     ( vout_thread_t *p_vout, int i_status );
  63 static void     Print             ( vout_thread_t *p_vout, int i_x, int i_y,
  64                                     int i_h_align, int i_v_align,
  65                                     unsigned char *psz_text );
  66 static void     SetBufferArea     ( vout_thread_t *p_vout, int i_x, int i_y,
  67                                     int i_w, int i_h );
  68 static void     SetBufferPicture  ( vout_thread_t *p_vout, picture_t *p_pic );
  69 static void     RenderPicture     ( vout_thread_t *p_vout, picture_t *p_pic );
  70 static void     RenderPictureInfo ( vout_thread_t *p_vout, picture_t *p_pic );
  71 static void     RenderSubPicture  ( vout_thread_t *p_vout,
  72                                     subpicture_t *p_subpic );
  73 static void     RenderInterface   ( vout_thread_t *p_vout );
  74 static int      RenderIdle        ( vout_thread_t *p_vout );
  75 static int      RenderSplash      ( vout_thread_t *p_vout );
  76 static void     RenderInfo        ( vout_thread_t *p_vout );
  77 static int      Manage            ( vout_thread_t *p_vout );
  78 static int      Align             ( vout_thread_t *p_vout, int *pi_x,
  79                                     int *pi_y, int i_width, int i_height,
  80                                     int i_h_align, int i_v_align );
  81 static void     SetPalette        ( p_vout_thread_t p_vout, u16 *red,
  82                                     u16 *green, u16 *blue, u16 *transp );
  83
  84 /*****************************************************************************
  85  * vout_CreateThread: creates a new video output thread
  86  *****************************************************************************
  87  * This function creates a new video output thread, and returns a pointer
  88  * to its description. On error, it returns NULL.
  89  * If pi_status is NULL, then the function will block until the thread is ready.
  90  * If not, it will be updated using one of the THREAD_* constants.
  91  *****************************************************************************/
  92 vout_thread_t * vout_CreateThread   ( char *psz_display, int i_root_window,
  93                           int i_width, int i_height, int *pi_status,
  94                           int i_method, void *p_data )
  95 {
  96     vout_thread_t * p_vout;                             /* thread descriptor */
  97     typedef void    ( vout_getplugin_t ) ( vout_thread_t * p_vout );
  98     int             i_status;                               /* thread status */
  99     int             i_index;               /* index for array initialization */
 100     int             i_best_index = 0, i_best_score = 0;
 101
 102     /* Allocate descriptor */
 103     intf_DbgMsg("\n");
 104     p_vout = (vout_thread_t *) malloc( sizeof(vout_thread_t) );
 105     if( p_vout == NULL )
 106     {
 107         intf_ErrMsg( "error: %s\n", strerror(ENOMEM) );
 108         return( NULL );
 109     }
 110
 111     p_vout->p_set_palette       = SetPalette;
 112
 113     /* Get a suitable video plugin */
 114     for( i_index = 0 ; i_index < p_main->p_bank->i_plugin_count ; i_index++ )
 115     {
 116         /* If there's a plugin in p_info ... */
 117         if( p_main->p_bank->p_info[ i_index ] != NULL )
 118         {
 119             /* ... and if this plugin provides the functions we want ... */
 120             if( p_main->p_bank->p_info[ i_index ]->vout_GetPlugin != NULL )
 121             {
 122                 /* ... and if this plugin has a good score ... */
 123                 if( p_main->p_bank->p_info[ i_index ]->i_score > i_best_score )
 124                 {
 125                     /* ... then take it */
 126                     i_best_score = p_main->p_bank->p_info[ i_index ]->i_score;
 127                     i_best_index = i_index;
 128                 }
 129             }
 130         }
 131     }
 132
 133     if( i_best_score == 0 )
 134     {
 135         free( p_vout );
 136         return( NULL );
 137     }
 138
 139     /* Get the plugin functions */
 140     ( (vout_getplugin_t *)
 141       p_main->p_bank->p_info[ i_best_index ]->vout_GetPlugin )( p_vout );
 142
 143     /* Initialize thread properties - thread id and locks will be initialized
 144      * later */
 145     p_vout->b_die               = 0;
 146     p_vout->b_error             = 0;
 147     p_vout->b_active            = 0;
 148     p_vout->pi_status           = (pi_status != NULL) ? pi_status : &i_status;
 149     *p_vout->pi_status          = THREAD_CREATE;
 150
 151     /* Initialize some fields used by the system-dependant method - these
 152      * fields will probably be modified by the method, and are only
 153      * preferences */
 154     p_vout->i_changes             = 0;
 155     p_vout->i_width               = i_width;
 156     p_vout->i_height              = i_height;
 157     p_vout->i_bytes_per_line      = i_width * 2;
 158     p_vout->i_screen_depth        = 15;
 159     p_vout->i_bytes_per_pixel     = 2;
 160     p_vout->f_gamma               = VOUT_GAMMA;
 161
 162     p_vout->b_grayscale           = main_GetIntVariable( VOUT_GRAYSCALE_VAR,
 163                                                        VOUT_GRAYSCALE_DEFAULT );
 164     p_vout->vdec_DecodeMacroblock = vdec_DecodeMacroblockC;
 165     p_vout->b_info                = 0;
 166     p_vout->b_interface           = 0;
 167     p_vout->b_scale               = 1;
 168
 169     intf_DbgMsg( "wished configuration: %dx%d, %d/%d bpp (%d Bpl)\n",
 170                  p_vout->i_width, p_vout->i_height, p_vout->i_screen_depth,
 171                  p_vout->i_bytes_per_pixel * 8, p_vout->i_bytes_per_line );
 172
 173     /* Initialize idle screen */
 174     p_vout->last_display_date   = 0;
 175     p_vout->last_idle_date      = 0;
 176     p_vout->init_display_date   = mdate();
 177     p_vout->render_time         = 10000;
 178
 179 #ifdef STATS
 180     /* Initialize statistics fields */
 181     p_vout->c_fps_samples       = 0;
 182 #endif
 183
 184     /* Initialize buffer index */
 185     p_vout->i_buffer_index      = 0;
 186
 187     /* Initialize pictures and subpictures - translation tables and functions
 188      * will be initialized later in InitThread */
 189     for( i_index = 0; i_index < VOUT_MAX_PICTURES; i_index++)
 190     {
 191         p_vout->p_picture[i_index].i_type   =   EMPTY_PICTURE;
 192         p_vout->p_picture[i_index].i_status =   FREE_PICTURE;
 193     }
 194     for( i_index = 0; i_index < VOUT_MAX_SUBPICTURES; i_index++)
 195     {
 196         p_vout->p_subpicture[i_index].i_type  = EMPTY_SUBPICTURE;
 197         p_vout->p_subpicture[i_index].i_status= FREE_SUBPICTURE;
 198     }
 199     p_vout->i_pictures = 0;
 200
 201     /* Create and initialize system-dependant method - this function issues its
 202      * own error messages */
 203     if( p_vout->p_sys_create( p_vout, psz_display, i_root_window, p_data ) )
 204     {
 205         free( p_vout );
 206         return( NULL );
 207     }
 208     intf_DbgMsg( "actual configuration: %dx%d, %d/%d bpp (%d Bpl), "
 209                  "masks: 0x%x/0x%x/0x%x\n",
 210                  p_vout->i_width, p_vout->i_height, p_vout->i_screen_depth,
 211                  p_vout->i_bytes_per_pixel * 8, p_vout->i_bytes_per_line,
 212                  p_vout->i_red_mask, p_vout->i_green_mask,
 213                  p_vout->i_blue_mask );
 214
 215     /* Calculate shifts from system-updated masks */
 216     MaskToShift( &p_vout->i_red_lshift, &p_vout->i_red_rshift,
 217                  p_vout->i_red_mask );
 218     MaskToShift( &p_vout->i_green_lshift, &p_vout->i_green_rshift,
 219                  p_vout->i_green_mask );
 220     MaskToShift( &p_vout->i_blue_lshift, &p_vout->i_blue_rshift,
 221                  p_vout->i_blue_mask );
 222
 223     /* Set some useful colors */
 224     p_vout->i_white_pixel = RGB2PIXEL( p_vout, 255, 255, 255 );
 225     p_vout->i_black_pixel = RGB2PIXEL( p_vout, 0, 0, 0 );
 226     p_vout->i_gray_pixel  = RGB2PIXEL( p_vout, 128, 128, 128 );
 227     p_vout->i_blue_pixel  = RGB2PIXEL( p_vout, 0, 0, 50 );
 228
 229     /* Load fonts - fonts must be initialized after the system method since
 230      * they may be dependant on screen depth and other thread properties */
 231     p_vout->p_default_font = vout_LoadFont( DATA_PATH "/" VOUT_DEFAULT_FONT );
 232     if( p_vout->p_default_font == NULL )
 233     {
 234         p_vout->p_default_font = vout_LoadFont( "share/" VOUT_DEFAULT_FONT );
 235     }
 236     if( p_vout->p_default_font == NULL )
 237     {
 238         intf_ErrMsg( "vout error: could not load default font\n" );
 239         p_vout->p_sys_destroy( p_vout );
 240         free( p_vout );
 241         return( NULL );
 242     }
 243     p_vout->p_large_font = vout_LoadFont( DATA_PATH "/" VOUT_LARGE_FONT );
 244     if( p_vout->p_large_font == NULL )
 245     {
 246         p_vout->p_large_font = vout_LoadFont( "share/" VOUT_LARGE_FONT );
 247     }
 248     if( p_vout->p_large_font == NULL )
 249     {
 250         intf_ErrMsg( "vout error: could not load large font\n" );
 251         vout_UnloadFont( p_vout->p_default_font );
 252         p_vout->p_sys_destroy( p_vout );
 253         free( p_vout );
 254         return( NULL );
 255     }
 256
 257     /* Create thread and set locks */
 258     vlc_mutex_init( &p_vout->picture_lock );
 259     vlc_mutex_init( &p_vout->subpicture_lock );
 260     vlc_mutex_init( &p_vout->change_lock );
 261     vlc_mutex_lock( &p_vout->change_lock );
 262     if( vlc_thread_create( &p_vout->thread_id, "video output",
 263                            (void *) RunThread, (void *) p_vout) )
 264     {
 265         intf_ErrMsg("error: %s\n", strerror(ENOMEM));
 266         vout_UnloadFont( p_vout->p_default_font );
 267         vout_UnloadFont( p_vout->p_large_font );
 268         p_vout->p_sys_destroy( p_vout );
 269         free( p_vout );
 270         return( NULL );
 271     }
 272
 273     intf_Msg( "Video display initialized (%dx%d, %d/%d bpp)\n", p_vout->i_width,
 274               p_vout->i_height, p_vout->i_screen_depth,
 275               p_vout->i_bytes_per_pixel * 8 );
 276
 277     /* If status is NULL, wait until the thread is created */
 278     if( pi_status == NULL )
 279     {
 280         do
 281         {
 282             msleep( THREAD_SLEEP );
 283         }while( (i_status != THREAD_READY) && (i_status != THREAD_ERROR)
 284                 && (i_status != THREAD_FATAL) );
 285         if( i_status != THREAD_READY )
 286         {
 287             return( NULL );
 288         }
 289     }
 290     return( p_vout );
 291 }
 292
 293 /*****************************************************************************
 294  * vout_DestroyThread: destroys a previously created thread
 295  *****************************************************************************
 296  * Destroy a terminated thread.
 297  * The function will request a destruction of the specified thread. If pi_error
 298  * is NULL, it will return once the thread is destroyed. Else, it will be
 299  * update using one of the THREAD_* constants.
 300  *****************************************************************************/
 301 void vout_DestroyThread( vout_thread_t *p_vout, int *pi_status )
 302 {
 303     int     i_status;                                       /* thread status */
 304
 305     /* Set status */
 306     intf_DbgMsg("\n");
 307     p_vout->pi_status = (pi_status != NULL) ? pi_status : &i_status;
 308     *p_vout->pi_status = THREAD_DESTROY;
 309
 310     /* Request thread destruction */
 311     p_vout->b_die = 1;
 312
 313     /* If status is NULL, wait until thread has been destroyed */
 314     if( pi_status == NULL )
 315     {
 316         do
 317         {
 318             msleep( THREAD_SLEEP );
 319         }while( (i_status != THREAD_OVER) && (i_status != THREAD_ERROR)
 320                 && (i_status != THREAD_FATAL) );
 321     }
 322 }
 323
 324 /*****************************************************************************
 325  * vout_DisplaySubPicture: display a subpicture unit
 326  *****************************************************************************
 327  * Remove the reservation flag of an subpicture, which will cause it to be ready
 328  * for display. The picture does not need to be locked, since it is ignored by
 329  * the output thread if is reserved.
 330  *****************************************************************************/
 331 void  vout_DisplaySubPicture( vout_thread_t *p_vout, subpicture_t *p_subpic )
 332 {
 333 #ifdef DEBUG_VIDEO
 334     char        psz_begin_date[MSTRTIME_MAX_SIZE]; /* buffer for date string */
 335     char        psz_end_date[MSTRTIME_MAX_SIZE];   /* buffer for date string */
 336 #endif
 337
 338 #ifdef DEBUG
 339     /* Check if status is valid */
 340     if( p_subpic->i_status != RESERVED_SUBPICTURE )
 341     {
 342         intf_DbgMsg("error: subpicture %p has invalid status %d\n", p_subpic,
 343                     p_subpic->i_status );
 344     }
 345 #endif
 346
 347     /* Remove reservation flag */
 348     p_subpic->i_status = READY_SUBPICTURE;
 349
 350 #ifdef DEBUG_VIDEO
 351     /* Send subpicture information */
 352     intf_DbgMsg("subpicture %p: type=%d, begin date=%s, end date=%s\n",
 353                 p_subpic, p_subpic->i_type,
 354                 mstrtime( psz_begin_date, p_subpic->begin_date ),
 355                 mstrtime( psz_end_date, p_subpic->end_date ) );
 356 #endif
 357 }
 358
 359 /*****************************************************************************
 360  * vout_CreateSubPicture: allocate a subpicture in the video output heap.
 361  *****************************************************************************
 362  * This function create a reserved subpicture in the video output heap.
 363  * A null pointer is returned if the function fails. This method provides an
 364  * already allocated zone of memory in the spu data fields. It needs locking
 365  * since several pictures can be created by several producers threads.
 366  *****************************************************************************/
 367 subpicture_t *vout_CreateSubPicture( vout_thread_t *p_vout, int i_type,
 368                                      int i_size )
 369 {
 370     int                 i_subpic;                        /* subpicture index */
 371     subpicture_t *      p_free_subpic = NULL;       /* first free subpicture */
 372     subpicture_t *      p_destroyed_subpic = NULL; /* first destroyed subpic */
 373
 374     /* Get lock */
 375     vlc_mutex_lock( &p_vout->subpicture_lock );
 376
 377     /*
 378      * Look for an empty place
 379      */
 380     for( i_subpic = 0; i_subpic < VOUT_MAX_SUBPICTURES; i_subpic++ )
 381     {
 382         if( p_vout->p_subpicture[i_subpic].i_status == DESTROYED_SUBPICTURE )
 383         {
 384             /* Subpicture is marked for destruction, but is still allocated */
 385             if( (p_vout->p_subpicture[i_subpic].i_type  == i_type)   &&
 386                 (p_vout->p_subpicture[i_subpic].i_size  >= i_size) )
 387             {
 388                 /* Memory size do match or is smaller : memory will not be
 389                  * reallocated, and function can end immediately - this is
 390                  * the best possible case, since no memory allocation needs
 391                  * to be done */
 392                 p_vout->p_subpicture[i_subpic].i_status = RESERVED_SUBPICTURE;
 393 #ifdef DEBUG_VIDEO
 394                 intf_DbgMsg("subpicture %p (in destroyed subpicture slot)\n",
 395                             &p_vout->p_subpicture[i_subpic] );
 396 #endif
 397                 vlc_mutex_unlock( &p_vout->subpicture_lock );
 398                 return( &p_vout->p_subpicture[i_subpic] );
 399             }
 400             else if( p_destroyed_subpic == NULL )
 401             {
 402                 /* Memory size do not match, but subpicture index will be kept in
 403                  * case no other place are left */
 404                 p_destroyed_subpic = &p_vout->p_subpicture[i_subpic];
 405             }
 406         }
 407         else if( (p_free_subpic == NULL) &&
 408                  (p_vout->p_subpicture[i_subpic].i_status == FREE_SUBPICTURE ))
 409         {
 410             /* Subpicture is empty and ready for allocation */
 411             p_free_subpic = &p_vout->p_subpicture[i_subpic];
 412         }
 413     }
 414
 415     /* If no free subpictures are available, use a destroyed subpicture */
 416     if( (p_free_subpic == NULL) && (p_destroyed_subpic != NULL ) )
 417     {
 418         /* No free subpicture or matching destroyed subpictures have been
 419          * found, but a destroyed subpicture is still avalaible */
 420         free( p_destroyed_subpic->p_data );
 421         p_free_subpic = p_destroyed_subpic;
 422     }
 423
 424     /*
 425      * Prepare subpicture
 426      */
 427     if( p_free_subpic != NULL )
 428     {
 429         /* Allocate memory */
 430         switch( i_type )
 431         {
 432         case TEXT_SUBPICTURE:                             /* text subpicture */
 433             p_free_subpic->p_data = malloc( i_size + 1 );
 434             break;
 435         case DVD_SUBPICTURE:                          /* DVD subpicture unit */
 436             p_free_subpic->p_data = malloc( i_size );
 437             break;
 438 #ifdef DEBUG
 439         default:
 440             intf_DbgMsg("error: unknown subpicture type %d\n", i_type );
 441             p_free_subpic->p_data   =  NULL;
 442             break;
 443 #endif
 444         }
 445
 446         if( p_free_subpic->p_data != NULL )
 447         {
 448             /* Copy subpicture information, set some default values */
 449             p_free_subpic->i_type                      = i_type;
 450             p_free_subpic->i_status                    = RESERVED_SUBPICTURE;
 451             p_free_subpic->i_size                      = i_size;
 452             p_free_subpic->i_x                         = 0;
 453             p_free_subpic->i_y                         = 0;
 454             p_free_subpic->i_width                     = 0;
 455             p_free_subpic->i_height                    = 0;
 456             p_free_subpic->i_horizontal_align          = CENTER_RALIGN;
 457             p_free_subpic->i_vertical_align            = CENTER_RALIGN;
 458         }
 459         else
 460         {
 461             /* Memory allocation failed : set subpicture as empty */
 462             p_free_subpic->i_type   =  EMPTY_SUBPICTURE;
 463             p_free_subpic->i_status =  FREE_SUBPICTURE;
 464             p_free_subpic =            NULL;
 465             intf_ErrMsg("spu warning: %s\n", strerror( ENOMEM ) );
 466         }
 467
 468 #ifdef DEBUG_VIDEO
 469         intf_DbgMsg("subpicture %p (in free subpicture slot)\n", p_free_subpic );
 470 #endif
 471         vlc_mutex_unlock( &p_vout->subpicture_lock );
 472         return( p_free_subpic );
 473     }
 474
 475     /* No free or destroyed subpicture could be found */
 476     intf_DbgMsg( "warning: subpicture heap is full\n" );
 477     vlc_mutex_unlock( &p_vout->subpicture_lock );
 478     return( NULL );
 479 }
 480
 481 /*****************************************************************************
 482  * vout_DestroySubPicture: remove a subpicture from the heap
 483  *****************************************************************************
 484  * This function frees a previously reserved subpicture.
 485  * It is meant to be used when the construction of a picture aborted.
 486  * This function does not need locking since reserved subpictures are ignored
 487  * by the output thread.
 488  *****************************************************************************/
 489 void vout_DestroySubPicture( vout_thread_t *p_vout, subpicture_t *p_subpic )
 490 {
 491 #ifdef DEBUG
 492    /* Check if status is valid */
 493    if( p_subpic->i_status != RESERVED_SUBPICTURE )
 494    {
 495        intf_DbgMsg("error: subpicture %p has invalid status %d\n",
 496                    p_subpic, p_subpic->i_status );
 497    }
 498 #endif
 499
 500     p_subpic->i_status = DESTROYED_SUBPICTURE;
 501
 502 #ifdef DEBUG_VIDEO
 503     intf_DbgMsg("subpicture %p\n", p_subpic);
 504 #endif
 505 }
 506
 507 /*****************************************************************************
 508  * vout_DisplayPicture: display a picture
 509  *****************************************************************************
 510  * Remove the reservation flag of a picture, which will cause it to be ready for
 511  * display. The picture won't be displayed until vout_DatePicture has been
 512  * called.
 513  *****************************************************************************/
 514 void  vout_DisplayPicture( vout_thread_t *p_vout, picture_t *p_pic )
 515 {
 516     vlc_mutex_lock( &p_vout->picture_lock );
 517     switch( p_pic->i_status )
 518     {
 519     case RESERVED_PICTURE:
 520         p_pic->i_status = RESERVED_DISP_PICTURE;
 521         break;
 522     case RESERVED_DATED_PICTURE:
 523         p_pic->i_status = READY_PICTURE;
 524         break;
 525 #ifdef DEBUG
 526     default:
 527         intf_DbgMsg("error: picture %p has invalid status %d\n", p_pic, p_pic->i_status );
 528         break;
 529 #endif
 530     }
 531
 532 #ifdef DEBUG_VIDEO
 533     intf_DbgMsg("picture %p\n", p_pic);
 534 #endif
 535     vlc_mutex_unlock( &p_vout->picture_lock );
 536 }
 537
 538 /*****************************************************************************
 539  * vout_DatePicture: date a picture
 540  *****************************************************************************
 541  * Remove the reservation flag of a picture, which will cause it to be ready for
 542  * display. The picture won't be displayed until vout_DisplayPicture has been
 543  * called.
 544  *****************************************************************************/
 545 void  vout_DatePicture( vout_thread_t *p_vout, picture_t *p_pic, mtime_t date )
 546 {
 547 #ifdef DEBUG_VIDEO
 548     char        psz_date[MSTRTIME_MAX_SIZE];                         /* date */
 549 #endif
 550
 551     vlc_mutex_lock( &p_vout->picture_lock );
 552     p_pic->date = date;
 553     switch( p_pic->i_status )
 554     {
 555     case RESERVED_PICTURE:
 556         p_pic->i_status = RESERVED_DATED_PICTURE;
 557         break;
 558     case RESERVED_DISP_PICTURE:
 559         p_pic->i_status = READY_PICTURE;
 560         break;
 561 #ifdef DEBUG
 562     default:
 563         intf_DbgMsg("error: picture %p has invalid status %d\n", p_pic, p_pic->i_status );
 564         break;
 565 #endif
 566     }
 567
 568 #ifdef DEBUG_VIDEO
 569     intf_DbgMsg("picture %p, display date: %s\n", p_pic, mstrtime( psz_date, p_pic->date) );
 570 #endif
 571     vlc_mutex_unlock( &p_vout->picture_lock );
 572 }
 573
 574 /*****************************************************************************
 575  * vout_CreatePicture: allocate a picture in the video output heap.
 576  *****************************************************************************
 577  * This function create a reserved image in the video output heap.
 578  * A null pointer is returned if the function fails. This method provides an
 579  * already allocated zone of memory in the picture data fields. It needs locking
 580  * since several pictures can be created by several producers threads.
 581  *****************************************************************************/
 582 picture_t *vout_CreatePicture( vout_thread_t *p_vout, int i_type,
 583                                int i_width, int i_height )
 584 {
 585     int         i_picture;                                  /* picture index */
 586     int         i_chroma_width = 0;                          /* chroma width */
 587     picture_t * p_free_picture = NULL;                 /* first free picture */
 588     picture_t * p_destroyed_picture = NULL;       /* first destroyed picture */
 589
 590     /* Get lock */
 591     vlc_mutex_lock( &p_vout->picture_lock );
 592
 593     /*
 594      * Look for an empty place
 595      */
 596     for( i_picture = 0; i_picture < VOUT_MAX_PICTURES; i_picture++ )
 597     {
 598         if( p_vout->p_picture[i_picture].i_status == DESTROYED_PICTURE )
 599         {
 600             /* Picture is marked for destruction, but is still allocated - note
 601              * that if width and type are the same for two pictures, chroma_width
 602              * should also be the same */
 603             if( (p_vout->p_picture[i_picture].i_type           == i_type)   &&
 604                 (p_vout->p_picture[i_picture].i_height         == i_height) &&
 605                 (p_vout->p_picture[i_picture].i_width          == i_width) )
 606             {
 607                 /* Memory size do match : memory will not be reallocated, and function
 608                  * can end immediately - this is the best possible case, since no
 609                  * memory allocation needs to be done */
 610                 p_vout->p_picture[i_picture].i_status = RESERVED_PICTURE;
 611                 p_vout->i_pictures++;
 612 #ifdef DEBUG_VIDEO
 613                 intf_DbgMsg("picture %p (in destroyed picture slot)\n",
 614                             &p_vout->p_picture[i_picture] );
 615 #endif
 616                 vlc_mutex_unlock( &p_vout->picture_lock );
 617                 return( &p_vout->p_picture[i_picture] );
 618             }
 619             else if( p_destroyed_picture == NULL )
 620             {
 621                 /* Memory size do not match, but picture index will be kept in
 622                  * case no other place are left */
 623                 p_destroyed_picture = &p_vout->p_picture[i_picture];
 624             }
 625         }
 626         else if( (p_free_picture == NULL) &&
 627                  (p_vout->p_picture[i_picture].i_status == FREE_PICTURE ))
 628         {
 629             /* Picture is empty and ready for allocation */
 630             p_free_picture = &p_vout->p_picture[i_picture];
 631         }
 632     }
 633
 634     /* If no free picture is available, use a destroyed picture */
 635     if( (p_free_picture == NULL) && (p_destroyed_picture != NULL ) )
 636     {
 637         /* No free picture or matching destroyed picture has been found, but
 638          * a destroyed picture is still avalaible */
 639         free( p_destroyed_picture->p_data );
 640         p_free_picture = p_destroyed_picture;
 641     }
 642
 643     /*
 644      * Prepare picture
 645      */
 646     if( p_free_picture != NULL )
 647     {
 648         /* Allocate memory */
 649         switch( i_type )
 650         {
 651         case YUV_420_PICTURE:        /* YUV 420: 1,1/4,1/4 samples per pixel */
 652             i_chroma_width = i_width / 2;
 653             p_free_picture->p_data = malloc( i_height * i_chroma_width * 3 * sizeof( yuv_data_t ) );
 654             p_free_picture->p_y = (yuv_data_t *)p_free_picture->p_data;
 655             p_free_picture->p_u = (yuv_data_t *)p_free_picture->p_data +i_height*i_chroma_width*4/2;
 656             p_free_picture->p_v = (yuv_data_t *)p_free_picture->p_data +i_height*i_chroma_width*5/2;
 657             break;
 658         case YUV_422_PICTURE:        /* YUV 422: 1,1/2,1/2 samples per pixel */
 659             i_chroma_width = i_width / 2;
 660             p_free_picture->p_data = malloc( i_height * i_chroma_width * 4 * sizeof( yuv_data_t ) );
 661             p_free_picture->p_y = (yuv_data_t *)p_free_picture->p_data;
 662             p_free_picture->p_u = (yuv_data_t *)p_free_picture->p_data +i_height*i_chroma_width*2;
 663             p_free_picture->p_v = (yuv_data_t *)p_free_picture->p_data +i_height*i_chroma_width*3;
 664             break;
 665         case YUV_444_PICTURE:            /* YUV 444: 1,1,1 samples per pixel */
 666             i_chroma_width = i_width;
 667             p_free_picture->p_data = malloc( i_height * i_chroma_width * 3 * sizeof( yuv_data_t ) );
 668             p_free_picture->p_y = (yuv_data_t *)p_free_picture->p_data;
 669             p_free_picture->p_u = (yuv_data_t *)p_free_picture->p_data +i_height*i_chroma_width;
 670             p_free_picture->p_v = (yuv_data_t *)p_free_picture->p_data +i_height*i_chroma_width*2;
 671             break;
 672 #ifdef DEBUG
 673         default:
 674             intf_DbgMsg("error: unknown picture type %d\n", i_type );
 675             p_free_picture->p_data   =  NULL;
 676             break;
 677 #endif
 678         }
 679
 680         if( p_free_picture->p_data != NULL )
 681         {
 682             /* Copy picture information, set some default values */
 683             p_free_picture->i_type                      = i_type;
 684             p_free_picture->i_status                    = RESERVED_PICTURE;
 685             p_free_picture->i_matrix_coefficients       = 1;
 686             p_free_picture->i_width                     = i_width;
 687             p_free_picture->i_height                    = i_height;
 688             p_free_picture->i_chroma_width              = i_chroma_width;
 689             p_free_picture->i_display_horizontal_offset = 0;
 690             p_free_picture->i_display_vertical_offset   = 0;
 691             p_free_picture->i_display_width             = i_width;
 692             p_free_picture->i_display_height            = i_height;
 693             p_free_picture->i_aspect_ratio              = AR_SQUARE_PICTURE;
 694             p_free_picture->i_refcount                  = 0;
 695             p_vout->i_pictures++;
 696         }
 697         else
 698         {
 699             /* Memory allocation failed : set picture as empty */
 700             p_free_picture->i_type   =  EMPTY_PICTURE;
 701             p_free_picture->i_status =  FREE_PICTURE;
 702             p_free_picture =            NULL;
 703             intf_ErrMsg("vout warning: %s\n", strerror( ENOMEM ) );
 704         }
 705
 706 #ifdef DEBUG_VIDEO
 707         intf_DbgMsg("picture %p (in free picture slot)\n", p_free_picture );
 708 #endif
 709         vlc_mutex_unlock( &p_vout->picture_lock );
 710         return( p_free_picture );
 711     }
 712
 713     /* No free or destroyed picture could be found */
 714     intf_DbgMsg( "warning: picture heap is full\n" );
 715     vlc_mutex_unlock( &p_vout->picture_lock );
 716     return( NULL );
 717 }
 718
 719 /*****************************************************************************
 720  * vout_DestroyPicture: remove a permanent or reserved picture from the heap
 721  *****************************************************************************
 722  * This function frees a previously reserved picture or a permanent
 723  * picture. It is meant to be used when the construction of a picture aborted.
 724  * Note that the picture will be destroyed even if it is linked !
 725  *****************************************************************************/
 726 void vout_DestroyPicture( vout_thread_t *p_vout, picture_t *p_pic )
 727 {
 728    vlc_mutex_lock( &p_vout->picture_lock );
 729
 730 #ifdef DEBUG
 731    /* Check if picture status is valid */
 732    if( (p_pic->i_status != RESERVED_PICTURE) &&
 733        (p_pic->i_status != RESERVED_DATED_PICTURE) &&
 734        (p_pic->i_status != RESERVED_DISP_PICTURE) )
 735    {
 736        intf_DbgMsg("error: picture %p has invalid status %d\n", p_pic, p_pic->i_status );
 737    }
 738 #endif
 739
 740    p_pic->i_status = DESTROYED_PICTURE;
 741    p_vout->i_pictures--;
 742
 743 #ifdef DEBUG_VIDEO
 744    intf_DbgMsg("picture %p\n", p_pic);
 745 #endif
 746    vlc_mutex_unlock( &p_vout->picture_lock );
 747 }
 748
 749 /*****************************************************************************
 750  * vout_LinkPicture: increment reference counter of a picture
 751  *****************************************************************************
 752  * This function increment the reference counter of a picture in the video
 753  * heap. It needs a lock since several producer threads can access the picture.
 754  *****************************************************************************/
 755 void vout_LinkPicture( vout_thread_t *p_vout, picture_t *p_pic )
 756 {
 757     vlc_mutex_lock( &p_vout->picture_lock );
 758     p_pic->i_refcount++;
 759
 760 #ifdef DEBUG_VIDEO
 761     intf_DbgMsg("picture %p refcount=%d\n", p_pic, p_pic->i_refcount );
 762 #endif
 763
 764     vlc_mutex_unlock( &p_vout->picture_lock );
 765 }
 766
 767 /*****************************************************************************
 768  * vout_UnlinkPicture: decrement reference counter of a picture
 769  *****************************************************************************
 770  * This function decrement the reference counter of a picture in the video heap.
 771  *****************************************************************************/
 772 void vout_UnlinkPicture( vout_thread_t *p_vout, picture_t *p_pic )
 773 {
 774     vlc_mutex_lock( &p_vout->picture_lock );
 775     p_pic->i_refcount--;
 776
 777 #ifdef DEBUG_VIDEO
 778     if( p_pic->i_refcount < 0 )
 779     {
 780         intf_DbgMsg("error: refcount < 0\n");
 781         p_pic->i_refcount = 0;
 782     }
 783 #endif
 784
 785     if( (p_pic->i_refcount == 0) && (p_pic->i_status == DISPLAYED_PICTURE) )
 786     {
 787         p_pic->i_status = DESTROYED_PICTURE;
 788         p_vout->i_pictures--;
 789     }
 790
 791 #ifdef DEBUG_VIDEO
 792     intf_DbgMsg("picture %p refcount=%d\n", p_pic, p_pic->i_refcount );
 793 #endif
 794
 795     vlc_mutex_unlock( &p_vout->picture_lock );
 796 }
 797
 798 /*****************************************************************************
 799  * vout_SetBuffers: set buffers adresses
 800  *****************************************************************************
 801  * This function is called by system drivers to set buffers video memory
 802  * adresses.
 803  *****************************************************************************/
 804 void vout_SetBuffers( vout_thread_t *p_vout, void *p_buf1, void *p_buf2 )
 805 {
 806     /* No picture previously */
 807     p_vout->p_buffer[0].i_pic_x =         0;
 808     p_vout->p_buffer[0].i_pic_y =         0;
 809     p_vout->p_buffer[0].i_pic_width =     0;
 810     p_vout->p_buffer[0].i_pic_height =    0;
 811     p_vout->p_buffer[1].i_pic_x =         0;
 812     p_vout->p_buffer[1].i_pic_y =         0;
 813     p_vout->p_buffer[1].i_pic_width =     0;
 814     p_vout->p_buffer[1].i_pic_height =    0;
 815
 816     /* The first area covers all the screen */
 817     p_vout->p_buffer[0].i_areas =                 1;
 818     p_vout->p_buffer[0].pi_area_begin[0] =        0;
 819     p_vout->p_buffer[0].pi_area_end[0] =          p_vout->i_height - 1;
 820     p_vout->p_buffer[1].i_areas =                 1;
 821     p_vout->p_buffer[1].pi_area_begin[0] =        0;
 822     p_vout->p_buffer[1].pi_area_end[0] =          p_vout->i_height - 1;
 823
 824     /* Set adresses */
 825     p_vout->p_buffer[0].p_data = p_buf1;
 826     p_vout->p_buffer[1].p_data = p_buf2;
 827 }
 828
 829 /*****************************************************************************
 830  * vout_Pixel2RGB: return red, green and blue from pixel value
 831  *****************************************************************************
 832  * Return color values, in 0-255 range, of the decomposition of a pixel. This
 833  * is a slow routine and should only be used for initialization phase.
 834  *****************************************************************************/
 835 void vout_Pixel2RGB( vout_thread_t *p_vout, u32 i_pixel, int *pi_red, int *pi_green, int *pi_blue )
 836 {
 837     *pi_red =   i_pixel & p_vout->i_red_mask;
 838     *pi_green = i_pixel & p_vout->i_green_mask;
 839     *pi_blue =  i_pixel & p_vout->i_blue_mask;
 840 }
 841
 842 /* following functions are local */
 843
 844 /*****************************************************************************
 845  * BinaryLog: computes the base 2 log of a binary value
 846  *****************************************************************************
 847  * This functions is used by MaskToShift, to get a bit index from a binary
 848  * value.
 849  *****************************************************************************/
 850 static int BinaryLog(u32 i)
 851 {
 852     int i_log;
 853
 854     i_log = 0;
 855     if (i & 0xffff0000)
 856     {
 857         i_log = 16;
 858     }
 859     if (i & 0xff00ff00)
 860     {
 861         i_log += 8;
 862     }
 863     if (i & 0xf0f0f0f0)
 864     {
 865         i_log += 4;
 866     }
 867     if (i & 0xcccccccc)
 868     {
 869         i_log += 2;
 870     }
 871     if (i & 0xaaaaaaaa)
 872     {
 873         i_log++;
 874     }
 875     if (i != ((u32)1 << i_log))
 876     {
 877         intf_DbgMsg("internal error: binary log overflow\n");
 878     }
 879
 880     return( i_log );
 881 }
 882
 883 /*****************************************************************************
 884  * MaskToShift: transform a color mask into right and left shifts
 885  *****************************************************************************
 886  * This function is used for obtaining color shifts from masks.
 887  *****************************************************************************/
 888 static void MaskToShift( int *pi_left, int *pi_right, u32 i_mask )
 889 {
 890     u32 i_low, i_high;                 /* lower hand higher bits of the mask */
 891
 892     /* Get bits */
 893     i_low =  i_mask & (- i_mask);                   /* lower bit of the mask */
 894     i_high = i_mask + i_low;                       /* higher bit of the mask */
 895
 896     /* Transform bits into an index */
 897     i_low =  BinaryLog (i_low);
 898     i_high = BinaryLog (i_high);
 899
 900     /* Update pointers and return */
 901     *pi_left =   i_low;
 902     *pi_right = (8 - i_high + i_low);
 903 }
 904
 905 /*****************************************************************************
 906  * InitThread: initialize video output thread
 907  *****************************************************************************
 908  * This function is called from RunThread and performs the second step of the
 909  * initialization. It returns 0 on success. Note that the thread's flag are not
 910  * modified inside this function.
 911  *****************************************************************************/
 912 static int InitThread( vout_thread_t *p_vout )
 913 {
 914     /* Update status */
 915     intf_DbgMsg("\n");
 916     *p_vout->pi_status = THREAD_START;
 917
 918    /* Initialize output method - this function issues its own error messages */
 919     if( p_vout->p_sys_init( p_vout ) )
 920     {
 921         return( 1 );
 922     }
 923
 924     /* Initialize convertion tables and functions */
 925     if( vout_InitYUV( p_vout ) )
 926     {
 927         intf_ErrMsg("error: can't allocate YUV translation tables\n");
 928         return( 1 );
 929     }
 930
 931     /* Mark thread as running and return */
 932     p_vout->b_active =          1;
 933     *p_vout->pi_status =        THREAD_READY;
 934
 935
 936     intf_DbgMsg("thread ready\n");
 937     return( 0 );
 938 }
 939
 940 /*****************************************************************************
 941  * RunThread: video output thread
 942  *****************************************************************************
 943  * Video output thread. This function does only returns when the thread is
 944  * terminated. It handles the pictures arriving in the video heap and the
 945  * display device events.
 946  *****************************************************************************/
 947 static void RunThread( vout_thread_t *p_vout)
 948 {
 949     int             i_index;                                /* index in heap */
 950     mtime_t         current_date;                            /* current date */
 951     mtime_t         display_date;                            /* display date */
 952     boolean_t       b_display;                               /* display flag */
 953     picture_t *     p_pic;                                /* picture pointer */
 954     subpicture_t *  p_subpic;                          /* subpicture pointer */
 955
 956     /*
 957      * Initialize thread
 958      */
 959     p_vout->b_error = InitThread( p_vout );
 960     if( p_vout->b_error )
 961     {
 962         DestroyThread( p_vout, THREAD_ERROR );
 963         return;
 964     }
 965     intf_DbgMsg("\n");
 966
 967     /*
 968      * Main loop - it is not executed if an error occured during
 969      * initialization
 970      */
 971     while( (!p_vout->b_die) && (!p_vout->b_error) )
 972     {
 973         /* Initialize loop variables */
 974         p_pic =         NULL;
 975         p_subpic =      NULL;
 976         display_date =  0;
 977         current_date =  mdate();
 978
 979         /*
 980          * Find the picture to display - this operation does not need lock,
 981          * since only READY_PICTUREs are handled
 982          */
 983         for( i_index = 0; i_index < VOUT_MAX_PICTURES; i_index++ )
 984         {
 985             if( (p_vout->p_picture[i_index].i_status == READY_PICTURE) &&
 986             ( (p_pic == NULL) ||
 987               (p_vout->p_picture[i_index].date < display_date) ) )
 988             {
 989                 p_pic = &p_vout->p_picture[i_index];
 990                 display_date = p_pic->date;
 991             }
 992         }
 993
 994         if( p_pic )
 995         {
 996 #ifdef STATS
 997             /* Computes FPS rate */
 998             p_vout->p_fps_sample[ p_vout->c_fps_samples++ % VOUT_FPS_SAMPLES ] = display_date;
 999 #endif
1000             if( display_date < current_date )
1001             {
1002                 /* Picture is late: it will be destroyed and the thread
1003                  * will sleep and go to next picture */
1004
1005                 vlc_mutex_lock( &p_vout->picture_lock );
1006                 if( p_pic->i_refcount )
1007                 {
1008                     p_pic->i_status = DISPLAYED_PICTURE;
1009                 }
1010                 else
1011                 {
1012                     p_pic->i_status = DESTROYED_PICTURE;
1013                     p_vout->i_pictures--;
1014                 }
1015                 intf_ErrMsg( "warning: late picture skipped (%p)\n", p_pic );
1016                 vlc_mutex_unlock( &p_vout->picture_lock );
1017
1018                 continue;
1019             }
1020             else if( display_date > current_date + VOUT_DISPLAY_DELAY )
1021             {
1022                 /* A picture is ready to be rendered, but its rendering date
1023                  * is far from the current one so the thread will perform an
1024                  * empty loop as if no picture were found. The picture state
1025                  * is unchanged */
1026                 p_pic =         NULL;
1027                 display_date =  0;
1028             }
1029         }
1030         /*
1031          * Find the subpictures to display - this operation does not need
1032          * lock, since only READY_SUBPICTURE are handled. If no picture
1033          * has been selected, display_date will depend on the subpicture.
1034          * We get an easily parsable chained list of subpictures which
1035          * ends with NULL since p_subpic was initialized to NULL.
1036          */
1037         for( i_index = 0; i_index < VOUT_MAX_SUBPICTURES; i_index++ )
1038         {
1039             if( p_vout->p_subpicture[i_index].i_status == READY_SUBPICTURE )
1040             {
1041                 p_vout->p_subpicture[i_index].p_next = p_subpic;
1042                 p_subpic = &p_vout->p_subpicture[i_index];
1043             }
1044         }
1045
1046         /*
1047          * Perform rendering, sleep and display rendered picture
1048          */
1049         if( p_pic )                        /* picture and perhaps subpicture */
1050         {
1051             b_display = p_vout->b_active;
1052             p_vout->last_display_date = display_date;
1053
1054             if( b_display )
1055             {
1056                 /* Set picture dimensions and clear buffer */
1057                 SetBufferPicture( p_vout, p_pic );
1058
1059                 /* Render picture and information */
1060                 RenderPicture( p_vout, p_pic );
1061                 if( p_vout->b_info )
1062                 {
1063                     RenderPictureInfo( p_vout, p_pic );
1064                     RenderInfo( p_vout );
1065                 }
1066                 if( p_subpic )
1067                 {
1068                     RenderSubPicture( p_vout, p_subpic );
1069                 }
1070             }
1071
1072             /* Remove picture from heap */
1073             vlc_mutex_lock( &p_vout->picture_lock );
1074             if( p_pic->i_refcount )
1075             {
1076                 p_pic->i_status = DISPLAYED_PICTURE;
1077             }
1078             else
1079             {
1080                 p_pic->i_status = DESTROYED_PICTURE;
1081                 p_vout->i_pictures--;
1082             }
1083             vlc_mutex_unlock( &p_vout->picture_lock );
1084
1085             /* Render interface and subpicture */
1086             if( b_display && p_vout->b_interface )
1087             {
1088                 RenderInterface( p_vout );
1089             }
1090
1091         }
1092         else if( p_vout->b_active && p_vout->init_display_date == 0)        /* idle or interface screen alone */
1093         {
1094             if( p_vout->b_interface && 0 /* && XXX?? intf_change */ )
1095             {
1096                 /* Interface has changed, so a new rendering is required - force
1097                  * it by setting last idle date to 0 */
1098                 p_vout->last_idle_date = 0;
1099             }
1100
1101             /* Render idle screen and update idle date, then render interface if
1102              * required */
1103             b_display = RenderIdle( p_vout );
1104             if( b_display )
1105             {
1106                 p_vout->last_idle_date = current_date;
1107                 if( p_vout->b_interface )
1108                 {
1109                     RenderInterface( p_vout );
1110                 }
1111             }
1112
1113         }
1114         else
1115         {
1116             b_display = 0;
1117         }
1118
1119
1120         /*
1121          * chech for the current time and
1122          * display splash screen if everything is on time
1123          */
1124         if( p_vout->init_display_date > 0)
1125         {
1126             if( p_vout->b_active &&
1127                     mdate()-p_vout->init_display_date < 5000000)
1128             {
1129                 /* there is something to display ! */
1130                     b_display = 1;
1131                     RenderSplash( p_vout );
1132
1133             } else {
1134                 /* no splash screen ! */
1135                 intf_ErrMsgImm("End of splash screen\n");
1136                 p_vout->init_display_date=0;
1137             }
1138         }
1139
1140
1141
1142
1143         /*
1144          * Sleep, wake up and display rendered picture
1145          */
1146
1147         if( display_date != 0 )
1148         {
1149             /* Store render time */
1150             p_vout->render_time += mdate() - current_date;
1151             p_vout->render_time >>= 1;
1152         }
1153
1154         /* Give back change lock */
1155         vlc_mutex_unlock( &p_vout->change_lock );
1156
1157 #ifdef DEBUG_VIDEO
1158         {
1159             char        psz_date[MSTRTIME_MAX_SIZE];
1160             intf_DbgMsg( "picture %p waiting until %s\n", p_pic,
1161                     mstrtime(psz_date, display_date),
1162         }
1163 #endif
1164
1165         /* Sleep a while or until a given date */
1166         if( display_date != 0 )
1167         {
1168             mwait( display_date - VOUT_MWAIT_TOLERANCE );
1169         }
1170         else
1171         {
1172             msleep( VOUT_IDLE_SLEEP );
1173         }
1174
1175         /* On awakening, take back lock and send immediately picture to display,
1176          * then swap buffers */
1177         vlc_mutex_lock( &p_vout->change_lock );
1178 #ifdef DEBUG_VIDEO
1179         intf_DbgMsg( "picture %p, subpicture %p in buffer %d, display=%d\n", p_pic, p_subpic,
1180                      p_vout->i_buffer_index, b_display /* && !(p_vout->i_changes & VOUT_NODISPLAY_CHANGE) */ );
1181 #endif
1182         if( b_display /* && !(p_vout->i_changes & VOUT_NODISPLAY_CHANGE) */ )
1183         {
1184             p_vout->p_sys_display( p_vout );
1185 #ifndef SYS_BEOS
1186             p_vout->i_buffer_index = ++p_vout->i_buffer_index & 1;
1187 #endif
1188         }
1189
1190         /*
1191          * Check events and manage thread
1192          */
1193         if( p_vout->p_sys_manage( p_vout ) | Manage( p_vout ) )
1194         {
1195             /* A fatal error occured, and the thread must terminate immediately,
1196              * without displaying anything - setting b_error to 1 cause the
1197              * immediate end of the main while() loop. */
1198             p_vout->b_error = 1;
1199         }
1200     }
1201
1202     /*
1203      * Error loop - wait until the thread destruction is requested
1204      */
1205     if( p_vout->b_error )
1206     {
1207         ErrorThread( p_vout );
1208     }
1209
1210     /* End of thread */
1211     EndThread( p_vout );
1212     DestroyThread( p_vout, THREAD_OVER );
1213     intf_DbgMsg( "thread end\n" );
1214 }
1215
1216 /*****************************************************************************
1217  * ErrorThread: RunThread() error loop
1218  *****************************************************************************
1219  * This function is called when an error occured during thread main's loop. The
1220  * thread can still receive feed, but must be ready to terminate as soon as
1221  * possible.
1222  *****************************************************************************/
1223 static void ErrorThread( vout_thread_t *p_vout )
1224 {
1225     /* Wait until a `die' order */
1226     intf_DbgMsg("\n");
1227     while( !p_vout->b_die )
1228     {
1229         /* Sleep a while */
1230         msleep( VOUT_IDLE_SLEEP );
1231     }
1232 }
1233
1234 /*****************************************************************************
1235  * EndThread: thread destruction
1236  *****************************************************************************
1237  * This function is called when the thread ends after a sucessful
1238  * initialization. It frees all ressources allocated by InitThread.
1239  *****************************************************************************/
1240 static void EndThread( vout_thread_t *p_vout )
1241 {
1242     int     i_index;                                        /* index in heap */
1243
1244     /* Store status */
1245     intf_DbgMsg("\n");
1246     *p_vout->pi_status = THREAD_END;
1247
1248     /* Destroy all remaining pictures and subpictures */
1249     for( i_index = 0; i_index < VOUT_MAX_PICTURES; i_index++ )
1250     {
1251         if( p_vout->p_picture[i_index].i_status != FREE_PICTURE )
1252         {
1253             free( p_vout->p_picture[i_index].p_data );
1254         }
1255     }
1256     for( i_index = 0; i_index < VOUT_MAX_SUBPICTURES; i_index++ )
1257     {
1258         if( p_vout->p_subpicture[i_index].i_status != FREE_SUBPICTURE )
1259         {
1260             free( p_vout->p_subpicture[i_index].p_data );
1261         }
1262     }
1263
1264     /* Destroy translation tables */
1265     vout_EndYUV( p_vout );
1266     p_vout->p_sys_end( p_vout );
1267 }
1268
1269 /*****************************************************************************
1270  * DestroyThread: thread destruction
1271  *****************************************************************************
1272  * This function is called when the thread ends. It frees all ressources
1273  * allocated by CreateThread. Status is available at this stage.
1274  *****************************************************************************/
1275 static void DestroyThread( vout_thread_t *p_vout, int i_status )
1276 {
1277     int *pi_status;                                         /* status adress */
1278
1279     /* Store status adress */
1280     intf_DbgMsg("\n");
1281     pi_status = p_vout->pi_status;
1282
1283     /* Destroy thread structures allocated by Create and InitThread */
1284     vout_UnloadFont( p_vout->p_default_font );
1285     vout_UnloadFont( p_vout->p_large_font );
1286     p_vout->p_sys_destroy( p_vout );
1287
1288     /* Free structure */
1289     free( p_vout );
1290     *pi_status = i_status;
1291 }
1292
1293 /*****************************************************************************
1294  * Print: print simple text on a picture
1295  *****************************************************************************
1296  * This function will print a simple text on the picture. It is designed to
1297  * print debugging or general information.
1298  *****************************************************************************/
1299 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 )
1300 {
1301     int                 i_text_height;                  /* total text height */
1302     int                 i_text_width;                    /* total text width */
1303
1304     /* Update upper left coordinates according to alignment */
1305     vout_TextSize( p_vout->p_default_font, 0, psz_text, &i_text_width, &i_text_height );
1306     if( !Align( p_vout, &i_x, &i_y, i_text_width, i_text_height, i_h_align, i_v_align ) )
1307     {
1308         /* Set area and print text */
1309         SetBufferArea( p_vout, i_x, i_y, i_text_width, i_text_height );
1310         vout_Print( p_vout->p_default_font, p_vout->p_buffer[ p_vout->i_buffer_index ].p_data +
1311                     i_y * p_vout->i_bytes_per_line + i_x * p_vout->i_bytes_per_pixel,
1312                     p_vout->i_bytes_per_pixel, p_vout->i_bytes_per_line,
1313                     p_vout->i_white_pixel, 0, 0,
1314                     0, psz_text, 100 );
1315     }
1316 }
1317
1318 /*****************************************************************************
1319  * SetBufferArea: activate an area in current buffer
1320  *****************************************************************************
1321  * This function is called when something is rendered on the current buffer.
1322  * It set the area as active and prepare it to be cleared on next rendering.
1323  * Pay attention to the fact that in this functions, i_h is in fact the end y
1324  * coordinate of the new area.
1325  *****************************************************************************/
1326 static void SetBufferArea( vout_thread_t *p_vout, int i_x, int i_y, int i_w, int i_h )
1327 {
1328     vout_buffer_t *     p_buffer;                          /* current buffer */
1329     int                 i_area_begin, i_area_end; /* area vertical extension */
1330     int                 i_area, i_area_copy;                   /* area index */
1331     int                 i_area_shift;            /* shift distance for areas */
1332
1333     /* Choose buffer and modify h to end of area position */
1334     p_buffer =  &p_vout->p_buffer[ p_vout->i_buffer_index ];
1335     i_h +=      i_y - 1;
1336
1337     /*
1338      * Remove part of the area which is inside the picture - this is done
1339      * by calling again SetBufferArea with the correct areas dimensions.
1340      */
1341     if( (i_x >= p_buffer->i_pic_x) && (i_x + i_w <= p_buffer->i_pic_x + p_buffer->i_pic_width) )
1342     {
1343         i_area_begin =  p_buffer->i_pic_y;
1344         i_area_end =    i_area_begin + p_buffer->i_pic_height - 1;
1345
1346         if( ((i_y >= i_area_begin) && (i_y <= i_area_end)) ||
1347             ((i_h >= i_area_begin) && (i_h <= i_area_end)) ||
1348             ((i_y <  i_area_begin) && (i_h > i_area_end)) )
1349         {
1350             /* Keep the stripe above the picture, if any */
1351             if( i_y < i_area_begin )
1352             {
1353                 SetBufferArea( p_vout, i_x, i_y, i_w, i_area_begin - i_y );
1354             }
1355             /* Keep the stripe below the picture, if any */
1356             if( i_h > i_area_end )
1357             {
1358                 SetBufferArea( p_vout, i_x, i_area_end, i_w, i_h - i_area_end );
1359             }
1360             return;
1361         }
1362     }
1363
1364     /* Skip some extensions until interesting areas */
1365     for( i_area = 0;
1366          (i_area < p_buffer->i_areas) &&
1367              (p_buffer->pi_area_end[i_area] + 1 <= i_y);
1368          i_area++ )
1369     {
1370         ;
1371     }
1372
1373     if( i_area == p_buffer->i_areas )
1374     {
1375         /* New area is below all existing ones: just add it at the end of the
1376          * array, if possible - otherwise, append it to the last one */
1377         if( i_area < VOUT_MAX_AREAS )
1378         {
1379             p_buffer->pi_area_begin[i_area] = i_y;
1380             p_buffer->pi_area_end[i_area] = i_h;
1381             p_buffer->i_areas++;
1382         }
1383         else
1384         {
1385 #ifdef DEBUG_VIDEO
1386             intf_DbgMsg("area overflow\n");
1387 #endif
1388             p_buffer->pi_area_end[VOUT_MAX_AREAS - 1] = i_h;
1389         }
1390     }
1391     else
1392     {
1393         i_area_begin =  p_buffer->pi_area_begin[i_area];
1394         i_area_end =    p_buffer->pi_area_end[i_area];
1395
1396         if( i_y < i_area_begin )
1397         {
1398             if( i_h >= i_area_begin - 1 )
1399             {
1400                 /* Extend area above */
1401                 p_buffer->pi_area_begin[i_area] = i_y;
1402             }
1403             else
1404             {
1405                 /* Create a new area above : merge last area if overflow, then
1406                  * move all old areas down */
1407                 if( p_buffer->i_areas == VOUT_MAX_AREAS )
1408                 {
1409 #ifdef DEBUG_VIDEO
1410                     intf_DbgMsg("areas overflow\n");
1411 #endif
1412                     p_buffer->pi_area_end[VOUT_MAX_AREAS - 2] = p_buffer->pi_area_end[VOUT_MAX_AREAS - 1];
1413                 }
1414                 else
1415                 {
1416                     p_buffer->i_areas++;
1417                 }
1418                 for( i_area_copy = p_buffer->i_areas - 1; i_area_copy > i_area; i_area_copy-- )
1419                 {
1420                     p_buffer->pi_area_begin[i_area_copy] = p_buffer->pi_area_begin[i_area_copy - 1];
1421                     p_buffer->pi_area_end[i_area_copy] =   p_buffer->pi_area_end[i_area_copy - 1];
1422                 }
1423                 p_buffer->pi_area_begin[i_area] = i_y;
1424                 p_buffer->pi_area_end[i_area] = i_h;
1425                 return;
1426             }
1427         }
1428         if( i_h > i_area_end )
1429         {
1430             /* Find further areas which can be merged with the new one */
1431             for( i_area_copy = i_area + 1;
1432                  (i_area_copy < p_buffer->i_areas) &&
1433                      (p_buffer->pi_area_begin[i_area] <= i_h);
1434                  i_area_copy++ )
1435             {
1436                 ;
1437             }
1438             i_area_copy--;
1439
1440             if( i_area_copy != i_area )
1441             {
1442                 /* Merge with last possible areas */
1443                 p_buffer->pi_area_end[i_area] = MAX( i_h, p_buffer->pi_area_end[i_area_copy] );
1444
1445                 /* Shift lower areas upward */
1446                 i_area_shift = i_area_copy - i_area;
1447                 p_buffer->i_areas -= i_area_shift;
1448                 for( i_area_copy = i_area + 1; i_area_copy < p_buffer->i_areas; i_area_copy++ )
1449                 {
1450                     p_buffer->pi_area_begin[i_area_copy] = p_buffer->pi_area_begin[i_area_copy + i_area_shift];
1451                     p_buffer->pi_area_end[i_area_copy] =   p_buffer->pi_area_end[i_area_copy + i_area_shift];
1452                 }
1453             }
1454             else
1455             {
1456                 /* Extend area below */
1457                 p_buffer->pi_area_end[i_area] = i_h;
1458             }
1459         }
1460     }
1461 }
1462
1463 /*****************************************************************************
1464  * SetBufferPicture: clear buffer and set picture area
1465  *****************************************************************************
1466  * This function is called before any rendering. It clears the current
1467  * rendering buffer and set the new picture area. If the picture pointer is
1468  * NULL, then no picture area is defined. Floating operations are avoided since
1469  * some MMX calculations may follow.
1470  *****************************************************************************/
1471 static void SetBufferPicture( vout_thread_t *p_vout, picture_t *p_pic )
1472 {
1473     vout_buffer_t *     p_buffer;                          /* current buffer */
1474     int                 i_pic_x, i_pic_y;                /* picture position */
1475     int                 i_pic_width, i_pic_height;     /* picture dimensions */
1476     int                 i_old_pic_y, i_old_pic_height;   /* old picture area */
1477     int                 i_vout_width, i_vout_height;   /* display dimensions */
1478     int                 i_area;                                /* area index */
1479     int                 i_data_index;                     /* area data index */
1480     int                 i_data_size;   /* area data size, in 256 bytes blocs */
1481     u64 *               p_data;                   /* area data, for clearing */
1482     byte_t *            p_data8;           /* area data, for clearing (slow) */
1483
1484     /* Choose buffer and set display dimensions */
1485     p_buffer =          &p_vout->p_buffer[ p_vout->i_buffer_index ];
1486     i_vout_width =      p_vout->i_width;
1487     i_vout_height =     p_vout->i_height;
1488
1489     /*
1490      * Computes new picture size
1491      */
1492     if( p_pic != NULL )
1493     {
1494         /* Try horizontal scaling first - width must be a mutiple of 16 */
1495         i_pic_width = (( p_vout->b_scale || (p_pic->i_width > i_vout_width)) ?
1496                        i_vout_width : p_pic->i_width) & ~0xf;
1497         switch( p_pic->i_aspect_ratio )
1498         {
1499         case AR_3_4_PICTURE:
1500             i_pic_height = i_pic_width * 3 / 4;
1501             break;
1502         case AR_16_9_PICTURE:
1503             i_pic_height = i_pic_width * 9 / 16;
1504             break;
1505         case AR_221_1_PICTURE:
1506             i_pic_height = i_pic_width * 100 / 221;
1507             break;
1508         case AR_SQUARE_PICTURE:
1509         default:
1510             i_pic_height = p_pic->i_height * i_pic_width / p_pic->i_width;
1511             break;
1512         }
1513
1514         /* If picture dimensions using horizontal scaling are too large, use
1515          * vertical scaling. Since width must be a multiple of 16, height is
1516          * adjusted again after. */
1517         if( i_pic_height > i_vout_height )
1518         {
1519             i_pic_height = ( p_vout->b_scale || (p_pic->i_height > i_vout_height)) ?
1520                 i_vout_height : p_pic->i_height;
1521             switch( p_pic->i_aspect_ratio )
1522             {
1523             case AR_3_4_PICTURE:
1524                 i_pic_width = (i_pic_height * 4 / 3) & ~0xf;
1525                 i_pic_height = i_pic_width * 3 / 4;
1526                 break;
1527             case AR_16_9_PICTURE:
1528                 i_pic_width = (i_pic_height * 16 / 9) & ~0xf;
1529                 i_pic_height = i_pic_width * 9 / 16;
1530                 break;
1531             case AR_221_1_PICTURE:
1532                 i_pic_width = (i_pic_height * 221 / 100) & ~0xf;
1533                 i_pic_height = i_pic_width * 100 / 221;
1534                 break;
1535             case AR_SQUARE_PICTURE:
1536             default:
1537                 i_pic_width = (p_pic->i_width * i_pic_height / p_pic->i_height) & ~0xf;
1538                 i_pic_height = p_pic->i_height * i_pic_width / p_pic->i_width;
1539                 break;
1540             }
1541         }
1542
1543         /* Set picture position */
1544         i_pic_x = (p_vout->i_width - i_pic_width) / 2;
1545         i_pic_y = (p_vout->i_height - i_pic_height) / 2;
1546     }
1547     else
1548     {
1549         /* No picture: size is 0 */
1550         i_pic_x =       0;
1551         i_pic_y =       0;
1552         i_pic_width =   0;
1553         i_pic_height =  0;
1554     }
1555
1556     /*
1557      * Set new picture size - if it is smaller than the previous one, clear
1558      * around it. Since picture are centered, only their size is tested.
1559      */
1560     if( (p_buffer->i_pic_width > i_pic_width) || (p_buffer->i_pic_height > i_pic_height) )
1561     {
1562         i_old_pic_y =            p_buffer->i_pic_y;
1563         i_old_pic_height =       p_buffer->i_pic_height;
1564         p_buffer->i_pic_x =      i_pic_x;
1565         p_buffer->i_pic_y =      i_pic_y;
1566         p_buffer->i_pic_width =  i_pic_width;
1567         p_buffer->i_pic_height = i_pic_height;
1568         SetBufferArea( p_vout, 0, i_old_pic_y, p_vout->i_width, i_old_pic_height );
1569     }
1570     else
1571     {
1572         p_buffer->i_pic_x =      i_pic_x;
1573         p_buffer->i_pic_y =      i_pic_y;
1574         p_buffer->i_pic_width =  i_pic_width;
1575         p_buffer->i_pic_height = i_pic_height;
1576     }
1577
1578     /*
1579      * Clear areas
1580      */
1581     for( i_area = 0; i_area < p_buffer->i_areas; i_area++ )
1582     {
1583 #ifdef DEBUG_VIDEO
1584         intf_DbgMsg("clearing picture %p area in buffer %d: %d-%d\n", p_pic,
1585                     p_vout->i_buffer_index, p_buffer->pi_area_begin[i_area], p_buffer->pi_area_end[i_area] );
1586 #endif
1587         i_data_size = (p_buffer->pi_area_end[i_area] - p_buffer->pi_area_begin[i_area] + 1) * p_vout->i_bytes_per_line;
1588         p_data = (u64*) (p_buffer->p_data + p_vout->i_bytes_per_line * p_buffer->pi_area_begin[i_area]);
1589         for( i_data_index = i_data_size / 256; i_data_index-- ; )
1590         {
1591             /* Clear 256 bytes block */
1592             *p_data++ = 0;  *p_data++ = 0;  *p_data++ = 0;  *p_data++ = 0;
1593             *p_data++ = 0;  *p_data++ = 0;  *p_data++ = 0;  *p_data++ = 0;
1594             *p_data++ = 0;  *p_data++ = 0;  *p_data++ = 0;  *p_data++ = 0;
1595             *p_data++ = 0;  *p_data++ = 0;  *p_data++ = 0;  *p_data++ = 0;
1596             *p_data++ = 0;  *p_data++ = 0;  *p_data++ = 0;  *p_data++ = 0;
1597             *p_data++ = 0;  *p_data++ = 0;  *p_data++ = 0;  *p_data++ = 0;
1598             *p_data++ = 0;  *p_data++ = 0;  *p_data++ = 0;  *p_data++ = 0;
1599             *p_data++ = 0;  *p_data++ = 0;  *p_data++ = 0;  *p_data++ = 0;
1600         }
1601         for( i_data_index = (i_data_size % 256) / 16; i_data_index--; )
1602         {
1603             /* Clear remaining 16 bytes blocks */
1604             *p_data++ = 0;  *p_data++ = 0;
1605         }
1606         p_data8 = (byte_t *)p_data;
1607         for( i_data_index = i_data_size % 16; i_data_index--; )
1608         {
1609             /* Clear remaining bytes */
1610             *p_data8++ = 0;
1611         }
1612     }
1613
1614     /*
1615      * Clear areas array
1616      */
1617     p_buffer->i_areas = 0;
1618 }
1619
1620 /*****************************************************************************
1621  * RenderPicture: render a picture
1622  *****************************************************************************
1623  * This function converts a picture from a video heap to a pixel-encoded image
1624  * and copies it to the current rendering buffer. No lock is required, since
1625  * the * rendered picture has been determined as existant, and will only be
1626  * destroyed by the vout thread later.
1627  *****************************************************************************/
1628 static void RenderPicture( vout_thread_t *p_vout, picture_t *p_pic )
1629 {
1630 #ifdef DEBUG_VIDEO
1631     char                psz_date[MSTRTIME_MAX_SIZE];         /* picture date */
1632     mtime_t             render_time;               /* picture rendering time */
1633 #endif
1634     vout_buffer_t *     p_buffer;                        /* rendering buffer */
1635     byte_t *            p_pic_data;                /* convertion destination */
1636
1637     /* Get and set rendering information */
1638     p_buffer =          &p_vout->p_buffer[ p_vout->i_buffer_index ];
1639     p_pic_data =        p_buffer->p_data +
1640                         p_buffer->i_pic_x * p_vout->i_bytes_per_pixel +
1641                         p_buffer->i_pic_y * p_vout->i_bytes_per_line;
1642 #ifdef DEBUG_VIDEO
1643     render_time = mdate();
1644 #endif
1645
1646     /*
1647      * Choose appropriate rendering function and render picture
1648      */
1649     switch( p_pic->i_type )
1650     {
1651     case YUV_420_PICTURE:
1652         p_vout->yuv.p_Convert420( p_vout, p_pic_data,
1653                                   p_pic->p_y, p_pic->p_u, p_pic->p_v,
1654                                   p_pic->i_width, p_pic->i_height,
1655                                   p_buffer->i_pic_width, p_buffer->i_pic_height,
1656                                   p_vout->i_bytes_per_line / p_vout->i_bytes_per_pixel,
1657                                   p_pic->i_matrix_coefficients );
1658         break;
1659     case YUV_422_PICTURE:
1660         p_vout->yuv.p_Convert422( p_vout, p_pic_data,
1661                                   p_pic->p_y, p_pic->p_u, p_pic->p_v,
1662                                   p_pic->i_width, p_pic->i_height,
1663                                   p_buffer->i_pic_width, p_buffer->i_pic_height,
1664                                   p_vout->i_bytes_per_line / p_vout->i_bytes_per_pixel,
1665                                   p_pic->i_matrix_coefficients );
1666         break;
1667     case YUV_444_PICTURE:
1668         p_vout->yuv.p_Convert444( p_vout, p_pic_data,
1669                                   p_pic->p_y, p_pic->p_u, p_pic->p_v,
1670                                   p_pic->i_width, p_pic->i_height,
1671                                   p_buffer->i_pic_width, p_buffer->i_pic_height,
1672                                   p_vout->i_bytes_per_line / p_vout->i_bytes_per_pixel,
1673                                   p_pic->i_matrix_coefficients );
1674         break;
1675 #ifdef DEBUG
1676     default:
1677         intf_DbgMsg("error: unknown picture type %d\n", p_pic->i_type );
1678         break;
1679 #endif
1680     }
1681
1682 #ifdef DEBUG_VIDEO
1683     /* Print picture date and rendering time */
1684     intf_DbgMsg("picture %p rendered in buffer %d (%ld us), display date: %s\n", p_pic,
1685                 p_vout->i_buffer_index, (long) (mdate() - render_time),
1686                 mstrtime( psz_date, p_pic->date ));
1687 #endif
1688 }
1689
1690 /*****************************************************************************
1691  * RenderPictureInfo: print additionnal information on a picture
1692  *****************************************************************************
1693  * This function will print information such as fps and other picture
1694  * dependant information.
1695  *****************************************************************************/
1696 static void RenderPictureInfo( vout_thread_t *p_vout, picture_t *p_pic )
1697 {
1698 #if defined(STATS) || defined(DEBUG)
1699     char        psz_buffer[256];                            /* string buffer */
1700 #endif
1701
1702 #ifdef STATS
1703     /*
1704      * Print FPS rate in upper right corner
1705      */
1706     if( p_vout->c_fps_samples > VOUT_FPS_SAMPLES )
1707     {
1708         long i_fps = VOUT_FPS_SAMPLES * 1000000 * 10 /
1709                            ( p_vout->p_fps_sample[ (p_vout->c_fps_samples - 1)
1710                                                    % VOUT_FPS_SAMPLES ] -
1711                              p_vout->p_fps_sample[ p_vout->c_fps_samples
1712                                                    % VOUT_FPS_SAMPLES ] );
1713         sprintf( psz_buffer, "%li.%i fps", i_fps / 10, (int)i_fps % 10 );
1714         Print( p_vout, 0, 0, RIGHT_RALIGN, TOP_RALIGN, psz_buffer );
1715     }
1716
1717     /*
1718      * Print frames count and loop time in upper left corner
1719      */
1720     sprintf( psz_buffer, "%ld frames, render: %ldus",
1721              (long) p_vout->c_fps_samples, (long) p_vout->render_time );
1722     Print( p_vout, 0, 0, LEFT_RALIGN, TOP_RALIGN, psz_buffer );
1723 #endif
1724
1725 #ifdef DEBUG
1726     /*
1727      * Print picture information in lower right corner
1728      */
1729     sprintf( psz_buffer, "%s picture %dx%d (%dx%d%+d%+d %s) -> %dx%d+%d+%d",
1730              (p_pic->i_type == YUV_420_PICTURE) ? "4:2:0" :
1731              ((p_pic->i_type == YUV_422_PICTURE) ? "4:2:2" :
1732               ((p_pic->i_type == YUV_444_PICTURE) ? "4:4:4" : "ukn-type")),
1733              p_pic->i_width, p_pic->i_height,
1734              p_pic->i_display_width, p_pic->i_display_height,
1735              p_pic->i_display_horizontal_offset, p_pic->i_display_vertical_offset,
1736              (p_pic->i_aspect_ratio == AR_SQUARE_PICTURE) ? "sq" :
1737              ((p_pic->i_aspect_ratio == AR_3_4_PICTURE) ? "4:3" :
1738               ((p_pic->i_aspect_ratio == AR_16_9_PICTURE) ? "16:9" :
1739                ((p_pic->i_aspect_ratio == AR_221_1_PICTURE) ? "2.21:1" : "ukn-ar" ))),
1740              p_vout->p_buffer[ p_vout->i_buffer_index ].i_pic_width,
1741              p_vout->p_buffer[ p_vout->i_buffer_index ].i_pic_height,
1742              p_vout->p_buffer[ p_vout->i_buffer_index ].i_pic_x,
1743              p_vout->p_buffer[ p_vout->i_buffer_index ].i_pic_y );
1744     Print( p_vout, 0, 0, RIGHT_RALIGN, BOTTOM_RALIGN, psz_buffer );
1745 #endif
1746 }
1747
1748 /*****************************************************************************
1749  * RenderSplash: render splash picture
1750  *****************************************************************************
1751  * This function will print something on the screen. It will return 0 if
1752  * nothing has been rendered, or 1 if something has been changed on the screen.
1753  * Note that if you absolutely want something to be printed, you will have
1754  * to force it by setting the last idle date to 0.
1755  * Unlike other rendering functions, this one calls the SetBufferPicture
1756  * function when needed.
1757  *****************************************************************************/
1758 int RenderSplash( vout_thread_t *p_vout )
1759 {
1760     int         i_x = 0, i_y = 0;                           /* text position */
1761     int         i_width, i_height;                              /* text size */
1762     char *psz_text =    "VideoLAN Client (" VERSION ")";  /* text to display */
1763
1764     memset( p_vout->p_buffer[ p_vout->i_buffer_index ].p_data,
1765                   p_vout->i_bytes_per_line * p_vout->i_height, 12);
1766
1767  //   SetBufferPicture( p_vout, NULL );
1768     vout_TextSize( p_vout->p_large_font, WIDE_TEXT | OUTLINED_TEXT, psz_text,
1769                    &i_width, &i_height );
1770     if( !Align( p_vout, &i_x, &i_y, i_width, i_height, CENTER_RALIGN, CENTER_RALIGN ) )
1771     {
1772         vout_Print( p_vout->p_large_font,
1773                     p_vout->p_buffer[ p_vout->i_buffer_index ].p_data +
1774                     i_x * p_vout->i_bytes_per_pixel + (i_y - 16 ) * p_vout->i_bytes_per_line,
1775                     p_vout->i_bytes_per_pixel, p_vout->i_bytes_per_line,
1776                     p_vout->i_white_pixel, p_vout->i_gray_pixel, 0,
1777                     WIDE_TEXT | OUTLINED_TEXT, psz_text, 100);
1778         SetBufferArea( p_vout, i_x, i_y, i_width, i_height);
1779     }
1780     return( 1 );
1781 }
1782
1783
1784 /*****************************************************************************
1785  * RenderIdle: render idle picture
1786  *****************************************************************************
1787  * This function will print something on the screen. It will return 0 if
1788  * nothing has been rendered, or 1 if something has been changed on the screen.
1789  * Note that if you absolutely want something to be printed, you will have
1790  * to force it by setting the last idle date to 0.
1791  * Unlike other rendering functions, this one calls the SetBufferPicture
1792  * function when needed.
1793  *****************************************************************************/
1794 int RenderIdle( vout_thread_t *p_vout )
1795 {
1796     int         i_x = 0, i_y = 0;                           /* text position */
1797     int         i_width, i_height;                              /* text size */
1798     mtime_t     current_date;                                /* current date */
1799     int         i_amount = 0;                             /*  amount to draw */
1800     char *psz_text =    "Waiting for stream";            /* text to display */
1801     char *psz_wtext =   "[................]";
1802
1803
1804     memset( p_vout->p_buffer[ p_vout->i_buffer_index ].p_data,
1805                     p_vout->i_bytes_per_line * p_vout->i_height, 12);
1806
1807
1808     current_date = mdate();
1809     if( (current_date - p_vout->last_display_date) > VOUT_IDLE_DELAY
1810 //            && (current_date - p_vout->last_idle_date) > VOUT_IDLE_DELAY
1811     )
1812     {
1813         SetBufferPicture( p_vout, NULL );
1814         vout_TextSize( p_vout->p_large_font, WIDE_TEXT | OUTLINED_TEXT, psz_text,
1815                        &i_width, &i_height );
1816         if( !Align( p_vout, &i_x, &i_y, i_width, i_height * 2, CENTER_RALIGN, CENTER_RALIGN ) )
1817         {
1818             i_amount = (int) ((current_date - p_vout->last_display_date ) / 5000LL);
1819             vout_Print( p_vout->p_large_font,
1820                         p_vout->p_buffer[ p_vout->i_buffer_index ].p_data +
1821                         i_x * p_vout->i_bytes_per_pixel + i_y * p_vout->i_bytes_per_line,
1822                         p_vout->i_bytes_per_pixel, p_vout->i_bytes_per_line,
1823                         p_vout->i_white_pixel, p_vout->i_gray_pixel, 0,
1824                         WIDE_TEXT | OUTLINED_TEXT, psz_text,  (i_amount / 3 ) %110);
1825
1826             vout_Print( p_vout->p_large_font,
1827                     p_vout->p_buffer[ p_vout->i_buffer_index ].p_data +
1828                     i_x * p_vout->i_bytes_per_pixel + (i_y + 16) * p_vout->i_bytes_per_line,
1829                     p_vout->i_bytes_per_pixel, p_vout->i_bytes_per_line,
1830                     p_vout->i_white_pixel, p_vout->i_gray_pixel, 0,
1831                     WIDE_TEXT | OUTLINED_TEXT, psz_wtext,  (i_amount/5)%110 );
1832
1833
1834             SetBufferArea( p_vout, i_x, i_y, i_width, i_height * 2 );
1835         }
1836         return( 1 );
1837     }
1838     return( 0 );
1839 }
1840
1841 /*****************************************************************************
1842  * RenderInfo: render additionnal information
1843  *****************************************************************************
1844  * This function renders information which do not depend on the current
1845  * picture rendered.
1846  *****************************************************************************/
1847 static void RenderInfo( vout_thread_t *p_vout )
1848 {
1849 #ifdef DEBUG
1850     char        psz_buffer[256];                            /* string buffer */
1851     int         i_ready_pic = 0;                           /* ready pictures */
1852     int         i_reserved_pic = 0;                     /* reserved pictures */
1853     int         i_picture;                                  /* picture index */
1854 #endif
1855
1856 #ifdef DEBUG
1857     /*
1858      * Print thread state in lower left corner
1859      */
1860     for( i_picture = 0; i_picture < VOUT_MAX_PICTURES; i_picture++ )
1861     {
1862         switch( p_vout->p_picture[i_picture].i_status )
1863         {
1864         case RESERVED_PICTURE:
1865         case RESERVED_DATED_PICTURE:
1866         case RESERVED_DISP_PICTURE:
1867             i_reserved_pic++;
1868             break;
1869         case READY_PICTURE:
1870             i_ready_pic++;
1871             break;
1872         }
1873     }
1874     sprintf( psz_buffer, "pic: %d (%d/%d)/%d",
1875              p_vout->i_pictures, i_reserved_pic, i_ready_pic, VOUT_MAX_PICTURES );
1876     Print( p_vout, 0, 0, LEFT_RALIGN, BOTTOM_RALIGN, psz_buffer );
1877 #endif
1878 }
1879
1880 /*****************************************************************************
1881  * RenderSubPicture: render a subpicture
1882  *****************************************************************************
1883  * This function renders a sub picture unit.
1884  *****************************************************************************/
1885 static void RenderSubPicture( vout_thread_t *p_vout, subpicture_t *p_subpic )
1886 {
1887     p_vout_font_t       p_font;                                 /* text font */
1888     int                 i_width, i_height;          /* subpicture dimensions */
1889
1890     while( p_subpic != NULL )
1891     {
1892         switch( p_subpic->i_type )
1893         {
1894         case DVD_SUBPICTURE:                          /* DVD subpicture unit */
1895             /* test if the picture really has to be displayed */
1896             if( mdate() < p_subpic->begin_date )
1897             {
1898                 /* not yet, see you later */
1899                 break;
1900             }
1901             if( mdate() > p_subpic->end_date )
1902             {
1903                 /* too late, destroying the subpic */
1904                 vout_DestroySubPicture( p_vout, p_subpic );
1905                 break;
1906             }
1907             vout_RenderSPU( &p_vout->p_buffer[ p_vout->i_buffer_index ],
1908                             p_subpic, p_vout->i_bytes_per_pixel,
1909                             p_vout->i_bytes_per_line );
1910             break;
1911         case TEXT_SUBPICTURE:                            /* single line text */
1912             /* Select default font if not specified */
1913             p_font = p_subpic->type.text.p_font;
1914             if( p_font == NULL )
1915             {
1916                 p_font = p_vout->p_default_font;
1917             }
1918
1919             /* Compute text size (width and height fields are ignored)
1920              * and print it */
1921             vout_TextSize( p_font, p_subpic->type.text.i_style,
1922                            p_subpic->p_data, &i_width, &i_height );
1923             if( !Align( p_vout, &p_subpic->i_x, &p_subpic->i_y,
1924                         i_width, i_height, p_subpic->i_horizontal_align,
1925                         p_subpic->i_vertical_align ) )
1926             {
1927                 vout_Print( p_font,
1928                             p_vout->p_buffer[ p_vout->i_buffer_index ].p_data +
1929                             p_subpic->i_x * p_vout->i_bytes_per_pixel +
1930                             p_subpic->i_y * p_vout->i_bytes_per_line,
1931                             p_vout->i_bytes_per_pixel, p_vout->i_bytes_per_line,
1932                             p_subpic->type.text.i_char_color,
1933                             p_subpic->type.text.i_border_color,
1934                             p_subpic->type.text.i_bg_color,
1935                             p_subpic->type.text.i_style, p_subpic->p_data, 100 );
1936                 SetBufferArea( p_vout, p_subpic->i_x, p_subpic->i_y,
1937                                i_width, i_height );
1938             }
1939             break;
1940
1941 #ifdef DEBUG
1942         default:
1943             intf_DbgMsg( "error: unknown subpicture %p type %d\n",
1944                          p_subpic, p_subpic->i_type );
1945 #endif
1946         }
1947
1948         p_subpic = p_subpic->p_next;
1949     }
1950 }
1951
1952 /*****************************************************************************
1953  * RenderInterface: render the interface
1954  *****************************************************************************
1955  * This function renders the interface, if any.
1956  *****************************************************************************/
1957 static void RenderInterface( vout_thread_t *p_vout )
1958 {
1959     int         i_height, i_text_height;            /* total and text height */
1960     int         i_width_1, i_width_2;                          /* text width */
1961     int         i_byte;                                        /* byte index */
1962     const char *psz_text_1 = "[1-9] Channel   [i]nfo   [c]olor     [g/G]amma";
1963     const char *psz_text_2 = "[+/-] Volume    [m]ute   [s]caling   [Q]uit";
1964
1965     /* Get text size */
1966     vout_TextSize( p_vout->p_large_font, OUTLINED_TEXT, psz_text_1, &i_width_1, &i_height );
1967     vout_TextSize( p_vout->p_large_font, OUTLINED_TEXT, psz_text_2, &i_width_2, &i_text_height );
1968     i_height += i_text_height;
1969
1970     /* Render background */
1971     for( i_byte = (p_vout->i_height - i_height) * p_vout->i_bytes_per_line;
1972          i_byte < p_vout->i_height * p_vout->i_bytes_per_line;
1973          i_byte++ )
1974     {
1975         /* XXX?? noooo ! */
1976         p_vout->p_buffer[ p_vout->i_buffer_index ].p_data[ i_byte ] = p_vout->i_blue_pixel;
1977     }
1978
1979     /* Render text, if not larger than screen */
1980     if( i_width_1 < p_vout->i_width )
1981     {
1982         vout_Print( p_vout->p_large_font, p_vout->p_buffer[ p_vout->i_buffer_index ].p_data +
1983                     (p_vout->i_height - i_height) * p_vout->i_bytes_per_line,
1984                     p_vout->i_bytes_per_pixel, p_vout->i_bytes_per_line,
1985                     p_vout->i_white_pixel, p_vout->i_black_pixel, 0,
1986                     OUTLINED_TEXT, psz_text_1, 100 );
1987     }
1988     if( i_width_2 < p_vout->i_width )
1989     {
1990         vout_Print( p_vout->p_large_font, p_vout->p_buffer[ p_vout->i_buffer_index ].p_data +
1991                     (p_vout->i_height - i_height + i_text_height) * p_vout->i_bytes_per_line,
1992                     p_vout->i_bytes_per_pixel, p_vout->i_bytes_per_line,
1993                     p_vout->i_white_pixel, p_vout->i_black_pixel, 0,
1994                     OUTLINED_TEXT, psz_text_2, 100 );
1995     }
1996
1997     /* Activate modified area */
1998     SetBufferArea( p_vout, 0, p_vout->i_height - i_height, p_vout->i_width, i_height );
1999 }
2000
2001 /*****************************************************************************
2002  * Manage: manage thread
2003  *****************************************************************************
2004  * This function will handle changes in thread configuration.
2005  *****************************************************************************/
2006 static int Manage( vout_thread_t *p_vout )
2007 {
2008 #ifdef DEBUG_VIDEO
2009     if( p_vout->i_changes )
2010     {
2011         intf_DbgMsg("changes: 0x%x (no display: 0x%x)\n", p_vout->i_changes,
2012                     0 /* p_vout->i_changes & VOUT_NODISPLAY_CHANGE */ );
2013     }
2014 #endif
2015
2016     /* On gamma or grayscale change, rebuild tables */
2017     if( p_vout->i_changes & (VOUT_GAMMA_CHANGE | VOUT_GRAYSCALE_CHANGE |
2018                              VOUT_YUV_CHANGE) )
2019     {
2020         /* Change vdec_DecodeMacroblock when switching between BW and C */
2021         if( !p_vout->b_grayscale )
2022         {
2023             p_vout->vdec_DecodeMacroblock = vdec_DecodeMacroblockC;
2024         }
2025         else if( p_vout->b_grayscale)
2026         {
2027             p_vout->vdec_DecodeMacroblock = vdec_DecodeMacroblockBW;
2028         }
2029         if( vout_ResetYUV( p_vout ) )
2030         {
2031             intf_ErrMsg("error: can't rebuild convertion tables\n");
2032             return( 1 );
2033         }
2034     }
2035
2036     /* Clear changes flags which does not need management or have been
2037      * handled */
2038     p_vout->i_changes &= ~(VOUT_GAMMA_CHANGE | VOUT_GRAYSCALE_CHANGE |
2039                            VOUT_YUV_CHANGE   | VOUT_INFO_CHANGE |
2040                            VOUT_INTF_CHANGE  | VOUT_SCALE_CHANGE );
2041
2042     /* Detect unauthorized changes */
2043     if( p_vout->i_changes )
2044     {
2045         /* Some changes were not acknowledged by p_vout->p_sys_manage or this
2046          * function, it means they should not be authorized */
2047         intf_ErrMsg( "error: unauthorized changes in the video output thread\n" );
2048         return( 1 );
2049     }
2050
2051     return( 0 );
2052 }
2053
2054 /*****************************************************************************
2055  * Align: align a subpicture in the screen
2056  *****************************************************************************
2057  * This function is used for rendering text or subpictures. It returns non 0
2058  * it the final aera is not fully included in display area. Return coordinates
2059  * are absolute.
2060  *****************************************************************************/
2061 static int Align( vout_thread_t *p_vout, int *pi_x, int *pi_y,
2062                    int i_width, int i_height, int i_h_align, int i_v_align )
2063 {
2064     /* Align horizontally */
2065     switch( i_h_align )
2066     {
2067     case CENTER_ALIGN:
2068         *pi_x -= i_width / 2;
2069         break;
2070     case CENTER_RALIGN:
2071         *pi_x += (p_vout->i_width - i_width) / 2;
2072         break;
2073     case RIGHT_ALIGN:
2074         *pi_x -= i_width;
2075         break;
2076     case RIGHT_RALIGN:
2077         *pi_x += p_vout->i_width - i_width;
2078         break;
2079     }
2080
2081     /* Align vertically */
2082     switch( i_v_align )
2083     {
2084     case CENTER_ALIGN:
2085         *pi_y -= i_height / 2;
2086         break;
2087     case CENTER_RALIGN:
2088         *pi_y += (p_vout->i_height - i_height) / 2;
2089         break;
2090     case BOTTOM_ALIGN:
2091         *pi_y -= i_height;
2092         break;
2093     case BOTTOM_RALIGN:
2094         *pi_y += p_vout->i_height - i_height;
2095         break;
2096     case SUBTITLE_RALIGN:
2097         *pi_y += (p_vout->i_height + p_vout->p_buffer[ p_vout->i_buffer_index ].i_pic_y +
2098                   p_vout->p_buffer[ p_vout->i_buffer_index ].i_pic_height - i_height) / 2;
2099         break;
2100     }
2101
2102     /* Return non 0 if clipping failed */
2103     return( (*pi_x < 0) || (*pi_y < 0) ||
2104             (*pi_x + i_width > p_vout->i_width) || (*pi_y + i_height > p_vout->i_height) );
2105 }
2106
2107 /*****************************************************************************
2108  * SetPalette: sets an 8 bpp palette
2109  *****************************************************************************
2110  * This function is just a prototype that does nothing. Architectures that
2111  * support palette allocation should override it.
2112  *****************************************************************************/
2113 static void     SetPalette        ( p_vout_thread_t p_vout, u16 *red,
2114                                     u16 *green, u16 *blue, u16 *transp )
2115 {
2116     intf_ErrMsg( "SetPalette: method does not support palette changing\n" );
2117 }
2118