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 GNU
  19  * General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public
  22  * License along with this program; if not, write to the
  23  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  24  * Boston, MA 02111-1307, USA.
  25  *****************************************************************************/
  26
  27 /*****************************************************************************
  28  * Preamble
  29  *****************************************************************************/
  30 #include "defs.h"
  31
  32 #include <errno.h>                                                 /* ENOMEM */
  33 #include <stdlib.h>                                                /* free() */
  34 #include <stdio.h>                                              /* sprintf() */
  35 #include <string.h>                                            /* strerror() */
  36
  37 #include "config.h"
  38 #include "common.h"
  39 #include "threads.h"
  40 #include "mtime.h"
  41 #include "plugins.h"
  42 #include "video.h"
  43 #include "video_output.h"
  44 #include "video_text.h"
  45 #include "video_spu.h"
  46 #include "video_yuv.h"
  47
  48 #include "intf_msg.h"
  49 #include "main.h"
  50
  51 /*****************************************************************************
  52  * Local prototypes
  53  *****************************************************************************/
  54 static int      BinaryLog         ( u32 i );
  55 static void     MaskToShift       ( int *pi_left, int *pi_right, u32 i_mask );
  56 static int      InitThread        ( vout_thread_t *p_vout );
  57 static void     RunThread         ( vout_thread_t *p_vout );
  58 static void     ErrorThread       ( vout_thread_t *p_vout );
  59 static void     EndThread         ( vout_thread_t *p_vout );
  60 static void     DestroyThread     ( vout_thread_t *p_vout, int i_status );
  61 static void     Print             ( vout_thread_t *p_vout, int i_x, int i_y,
  62                                     int i_h_align, int i_v_align,
  63                                     unsigned char *psz_text );
  64 static void     SetBufferArea     ( vout_thread_t *p_vout, int i_x, int i_y,
  65                                     int i_w, int i_h );
  66 static void     SetBufferPicture  ( vout_thread_t *p_vout, picture_t *p_pic );
  67 static void     RenderPicture     ( vout_thread_t *p_vout, picture_t *p_pic );
  68 static void     RenderPictureInfo ( vout_thread_t *p_vout, picture_t *p_pic );
  69 static void     RenderSubPicture  ( vout_thread_t *p_vout,
  70                                     subpicture_t *p_subpic );
  71 static void     RenderInterface   ( vout_thread_t *p_vout );
  72 static int      RenderIdle        ( vout_thread_t *p_vout );
  73 static void     RenderInfo        ( vout_thread_t *p_vout );
  74 static void     Synchronize       ( vout_thread_t *p_vout, s64 i_delay );
  75 static int      Manage            ( vout_thread_t *p_vout );
  76 static int      Align             ( vout_thread_t *p_vout, int *pi_x,
  77                                     int *pi_y, int i_width, int i_height,
  78                                     int i_h_align, int i_v_align );
  79 static void     SetPalette        ( p_vout_thread_t p_vout, u16 *red,
  80                                     u16 *green, u16 *blue, u16 *transp );
  81
  82 /*****************************************************************************
  83  * vout_CreateThread: creates a new video output thread
  84  *****************************************************************************
  85  * This function creates a new video output thread, and returns a pointer
  86  * to its description. On error, it returns NULL.
  87  * If pi_status is NULL, then the function will block until the thread is ready.
  88  * If not, it will be updated using one of the THREAD_* constants.
  89  *****************************************************************************/
  90 vout_thread_t * vout_CreateThread   ( char *psz_display, int i_root_window,
  91                           int i_width, int i_height, int *pi_status, int i_method )
  92 {
  93     vout_thread_t * p_vout;                             /* thread descriptor */
  94     int             i_status;                               /* thread status */
  95     int             i_index;               /* index for array initialization */
  96     char *          psz_method;
  97
  98     /* Allocate descriptor */
  99     intf_DbgMsg("\n");
 100     p_vout = (vout_thread_t *) malloc( sizeof(vout_thread_t) );
 101     if( p_vout == NULL )
 102     {
 103         intf_ErrMsg( "error: %s\n", strerror(ENOMEM) );
 104         return( NULL );
 105     }
 106
 107     /* Request an interface plugin */
 108     psz_method = main_GetPszVariable( VOUT_METHOD_VAR, VOUT_DEFAULT_METHOD );
 109
 110     if( RequestPlugin( &p_vout->vout_plugin, "vout", psz_method ) < 0 )
 111     {
 112         intf_ErrMsg( "error: could not open video plugin vout_%s.so\n", psz_method );
 113         free( p_vout );
 114         return( NULL );
 115     }
 116
 117     /* Get plugins */
 118     p_vout->p_sys_create =  GetPluginFunction( p_vout->vout_plugin, "vout_SysCreate" );
 119     p_vout->p_sys_init =    GetPluginFunction( p_vout->vout_plugin, "vout_SysInit" );
 120     p_vout->p_sys_end =     GetPluginFunction( p_vout->vout_plugin, "vout_SysEnd" );
 121     p_vout->p_sys_destroy = GetPluginFunction( p_vout->vout_plugin, "vout_SysDestroy" );
 122     p_vout->p_sys_manage =  GetPluginFunction( p_vout->vout_plugin, "vout_SysManage" );
 123     p_vout->p_sys_display = GetPluginFunction( p_vout->vout_plugin, "vout_SysDisplay" );
 124
 125     /* Initialize thread properties - thread id and locks will be initialized
 126      * later */
 127     p_vout->b_die               = 0;
 128     p_vout->b_error             = 0;
 129     p_vout->b_active            = 0;
 130     p_vout->pi_status           = (pi_status != NULL) ? pi_status : &i_status;
 131     *p_vout->pi_status          = THREAD_CREATE;
 132
 133     /* Initialize some fields used by the system-dependant method - these fields will
 134      * probably be modified by the method, and are only preferences */
 135     p_vout->i_changes           = 0;
 136     p_vout->i_width             = i_width;
 137     p_vout->i_height            = i_height;
 138     p_vout->i_bytes_per_line    = i_width * 2;
 139     p_vout->i_screen_depth      = 15;
 140     p_vout->i_bytes_per_pixel   = 2;
 141     p_vout->f_gamma             = VOUT_GAMMA;
 142
 143     p_vout->b_grayscale         = main_GetIntVariable( VOUT_GRAYSCALE_VAR, VOUT_GRAYSCALE_DEFAULT );
 144     p_vout->b_info              = 0;
 145     p_vout->b_interface         = 0;
 146     p_vout->b_scale             = 0;
 147
 148     p_vout->p_set_palette       = SetPalette;
 149
 150     intf_DbgMsg("wished configuration: %dx%d, %d/%d bpp (%d Bpl)\n",
 151                 p_vout->i_width, p_vout->i_height, p_vout->i_screen_depth,
 152                 p_vout->i_bytes_per_pixel * 8, p_vout->i_bytes_per_line );
 153
 154     /* Initialize idle screen */
 155     p_vout->last_display_date   = mdate();
 156     p_vout->last_display_date   = 0;
 157     p_vout->last_idle_date      = 0;
 158
 159 #ifdef STATS
 160     /* Initialize statistics fields */
 161     p_vout->render_time         = 0;
 162     p_vout->c_fps_samples       = 0;
 163 #endif
 164
 165     /* Initialize buffer index */
 166     p_vout->i_buffer_index      = 0;
 167
 168     /* Initialize pictures and subpictures - translation tables and functions
 169      * will be initialized later in InitThread */
 170     for( i_index = 0; i_index < VOUT_MAX_PICTURES; i_index++)
 171     {
 172         p_vout->p_picture[i_index].i_type   =   EMPTY_PICTURE;
 173         p_vout->p_picture[i_index].i_status =   FREE_PICTURE;
 174     }
 175     for( i_index = 0; i_index < VOUT_MAX_SUBPICTURES; i_index++)
 176     {
 177         p_vout->p_subpicture[i_index].i_type  = EMPTY_SUBPICTURE;
 178         p_vout->p_subpicture[i_index].i_status= FREE_SUBPICTURE;
 179     }
 180     p_vout->i_pictures = 0;
 181
 182     /* Initialize synchronization informations */
 183     p_vout->i_synchro_level     = VOUT_SYNCHRO_LEVEL_START;
 184
 185     /* Create and initialize system-dependant method - this function issues its
 186      * own error messages */
 187     if( p_vout->p_sys_create( p_vout, psz_display, i_root_window ) )
 188     {
 189         TrashPlugin( p_vout->vout_plugin );
 190         free( p_vout );
 191         return( NULL );
 192     }
 193     intf_DbgMsg("actual configuration: %dx%d, %d/%d bpp (%d Bpl), masks: 0x%x/0x%x/0x%x\n",
 194                 p_vout->i_width, p_vout->i_height, p_vout->i_screen_depth,
 195                 p_vout->i_bytes_per_pixel * 8, p_vout->i_bytes_per_line,
 196                 p_vout->i_red_mask, p_vout->i_green_mask, p_vout->i_blue_mask );
 197
 198     /* Calculate shifts from system-updated masks */
 199     MaskToShift( &p_vout->i_red_lshift,   &p_vout->i_red_rshift,   p_vout->i_red_mask );
 200     MaskToShift( &p_vout->i_green_lshift, &p_vout->i_green_rshift, p_vout->i_green_mask );
 201     MaskToShift( &p_vout->i_blue_lshift,  &p_vout->i_blue_rshift,  p_vout->i_blue_mask );
 202
 203     /* Set some useful colors */
 204     p_vout->i_white_pixel = RGB2PIXEL( p_vout, 255, 255, 255 );
 205     p_vout->i_black_pixel = RGB2PIXEL( p_vout, 0, 0, 0 );
 206     p_vout->i_gray_pixel  = RGB2PIXEL( p_vout, 128, 128, 128 );
 207     p_vout->i_blue_pixel  = RGB2PIXEL( p_vout, 0, 0, 50 );
 208
 209     /* Load fonts - fonts must be initialized after the system method since
 210      * they may be dependant on screen depth and other thread properties */
 211     p_vout->p_default_font      = vout_LoadFont( DATA_PATH "/" VOUT_DEFAULT_FONT );
 212     if( p_vout->p_default_font == NULL )
 213     {
 214         p_vout->p_default_font  = vout_LoadFont( "share/" VOUT_DEFAULT_FONT );
 215     }
 216     if( p_vout->p_default_font == NULL )
 217     {
 218         p_vout->p_sys_destroy( p_vout );
 219         TrashPlugin( p_vout->vout_plugin );
 220         free( p_vout );
 221         return( NULL );
 222     }
 223     p_vout->p_large_font        = vout_LoadFont( DATA_PATH "/" VOUT_LARGE_FONT );
 224     if( p_vout->p_large_font == NULL )
 225     {
 226         p_vout->p_large_font    = vout_LoadFont( "share/" VOUT_LARGE_FONT );
 227     }
 228     if( p_vout->p_large_font == NULL )
 229     {
 230         vout_UnloadFont( p_vout->p_default_font );
 231         p_vout->p_sys_destroy( p_vout );
 232         TrashPlugin( p_vout->vout_plugin );
 233         free( p_vout );
 234         return( NULL );
 235     }
 236
 237     /* Create thread and set locks */
 238     vlc_mutex_init( &p_vout->picture_lock );
 239     vlc_mutex_init( &p_vout->subpicture_lock );
 240     vlc_mutex_init( &p_vout->change_lock );
 241     vlc_mutex_lock( &p_vout->change_lock );
 242     if( vlc_thread_create( &p_vout->thread_id, "video output", (void *) RunThread, (void *) p_vout) )
 243     {
 244         intf_ErrMsg("error: %s\n", strerror(ENOMEM));
 245         vout_UnloadFont( p_vout->p_default_font );
 246         vout_UnloadFont( p_vout->p_large_font );
 247         p_vout->p_sys_destroy( p_vout );
 248         TrashPlugin( p_vout->vout_plugin );
 249         free( p_vout );
 250         return( NULL );
 251     }
 252
 253     intf_Msg("Video display initialized (%dx%d, %d/%d bpp)\n", p_vout->i_width,
 254              p_vout->i_height, p_vout->i_screen_depth, p_vout->i_bytes_per_pixel * 8 );
 255
 256     /* If status is NULL, wait until the thread is created */
 257     if( pi_status == NULL )
 258     {
 259         do
 260         {
 261             msleep( THREAD_SLEEP );
 262         }while( (i_status != THREAD_READY) && (i_status != THREAD_ERROR)
 263                 && (i_status != THREAD_FATAL) );
 264         if( i_status != THREAD_READY )
 265         {
 266             return( NULL );
 267         }
 268     }
 269     return( p_vout );
 270 }
 271
 272 /*****************************************************************************
 273  * vout_DestroyThread: destroys a previously created thread
 274  *****************************************************************************
 275  * Destroy a terminated thread.
 276  * The function will request a destruction of the specified thread. If pi_error
 277  * is NULL, it will return once the thread is destroyed. Else, it will be
 278  * update using one of the THREAD_* constants.
 279  *****************************************************************************/
 280 void vout_DestroyThread( vout_thread_t *p_vout, int *pi_status )
 281 {
 282     int     i_status;                                       /* thread status */
 283
 284     /* Set status */
 285     intf_DbgMsg("\n");
 286     p_vout->pi_status = (pi_status != NULL) ? pi_status : &i_status;
 287     *p_vout->pi_status = THREAD_DESTROY;
 288
 289     /* Request thread destruction */
 290     p_vout->b_die = 1;
 291
 292     /* If status is NULL, wait until thread has been destroyed */
 293     if( pi_status == NULL )
 294     {
 295         do
 296         {
 297             msleep( THREAD_SLEEP );
 298         }while( (i_status != THREAD_OVER) && (i_status != THREAD_ERROR)
 299                 && (i_status != THREAD_FATAL) );
 300     }
 301 }
 302
 303 /*****************************************************************************
 304  * vout_DisplaySubPicture: display a subpicture unit
 305  *****************************************************************************
 306  * Remove the reservation flag of an subpicture, which will cause it to be ready
 307  * for display. The picture does not need to be locked, since it is ignored by
 308  * the output thread if is reserved.
 309  *****************************************************************************/
 310 void  vout_DisplaySubPicture( vout_thread_t *p_vout, subpicture_t *p_subpic )
 311 {
 312 #ifdef DEBUG_VIDEO
 313     char        psz_begin_date[MSTRTIME_MAX_SIZE]; /* buffer for date string */
 314     char        psz_end_date[MSTRTIME_MAX_SIZE];   /* buffer for date string */
 315 #endif
 316
 317 #ifdef DEBUG
 318     /* Check if status is valid */
 319     if( p_subpic->i_status != RESERVED_SUBPICTURE )
 320     {
 321         intf_DbgMsg("error: subpicture %p has invalid status %d\n", p_subpic,
 322                     p_subpic->i_status );
 323     }
 324 #endif
 325
 326     /* Remove reservation flag */
 327     p_subpic->i_status = READY_SUBPICTURE;
 328
 329 #ifdef DEBUG_VIDEO
 330     /* Send subpicture informations */
 331     intf_DbgMsg("subpicture %p: type=%d, begin date=%s, end date=%s\n",
 332                 p_subpic, p_subpic->i_type,
 333                 mstrtime( psz_begin_date, p_subpic->begin_date ),
 334                 mstrtime( psz_end_date, p_subpic->end_date ) );
 335 #endif
 336 }
 337
 338 /*****************************************************************************
 339  * vout_CreateSubPicture: allocate an subpicture in the video output heap.
 340  *****************************************************************************
 341  * This function create a reserved subpicture in the video output heap.
 342  * A null pointer is returned if the function fails. This method provides an
 343  * already allocated zone of memory in the spu data fields. It needs locking
 344  * since several pictures can be created by several producers threads.
 345  *****************************************************************************/
 346 subpicture_t *vout_CreateSubPicture( vout_thread_t *p_vout, int i_type,
 347                                      int i_size )
 348 {
 349     int                 i_subpic;                        /* subpicture index */
 350     subpicture_t *      p_free_subpic = NULL;       /* first free subpicture */
 351     subpicture_t *      p_destroyed_subpic = NULL; /* first destroyed subpic */
 352
 353     /* Get lock */
 354     vlc_mutex_lock( &p_vout->subpicture_lock );
 355
 356     /*
 357      * Look for an empty place
 358      */
 359     for( i_subpic = 0; i_subpic < VOUT_MAX_SUBPICTURES; i_subpic++ )
 360     {
 361         if( p_vout->p_subpicture[i_subpic].i_status == DESTROYED_SUBPICTURE )
 362         {
 363             /* Subpicture is marked for destruction, but is still allocated */
 364             if( (p_vout->p_subpicture[i_subpic].i_type  == i_type)   &&
 365                 (p_vout->p_subpicture[i_subpic].i_size  >= i_size) )
 366             {
 367                 /* Memory size do match or is smaller : memory will not be
 368                  * reallocated, and function can end immediately - this is
 369                  * the best possible case, since no memory allocation needs
 370                  * to be done */
 371                 p_vout->p_subpicture[i_subpic].i_status = RESERVED_SUBPICTURE;
 372 #ifdef DEBUG_VIDEO
 373                 intf_DbgMsg("subpicture %p (in destroyed subpicture slot)\n",
 374                             &p_vout->p_subpicture[i_subpic] );
 375 #endif
 376                 vlc_mutex_unlock( &p_vout->subpicture_lock );
 377                 return( &p_vout->p_subpicture[i_subpic] );
 378             }
 379             else if( p_destroyed_subpic == NULL )
 380             {
 381                 /* Memory size do not match, but subpicture index will be kept in
 382                  * case no other place are left */
 383                 p_destroyed_subpic = &p_vout->p_subpicture[i_subpic];
 384             }
 385         }
 386         else if( (p_free_subpic == NULL) &&
 387                  (p_vout->p_subpicture[i_subpic].i_status == FREE_SUBPICTURE ))
 388         {
 389             /* Subpicture is empty and ready for allocation */
 390             p_free_subpic = &p_vout->p_subpicture[i_subpic];
 391         }
 392     }
 393
 394     /* If no free subpicture is available, use a destroyed subpicture */
 395     if( (p_free_subpic == NULL) && (p_destroyed_subpic != NULL ) )
 396     {
 397         /* No free subpicture or matching destroyed subpicture has been
 398          * found, but a destroyed subpicture is still avalaible */
 399         free( p_destroyed_subpic->p_data );
 400         p_free_subpic = p_destroyed_subpic;
 401     }
 402
 403     /*
 404      * Prepare subpicture
 405      */
 406     if( p_free_subpic != NULL )
 407     {
 408         /* Allocate memory */
 409         switch( i_type )
 410         {
 411         case TEXT_SUBPICTURE:                             /* text subpicture */
 412             p_free_subpic->p_data = malloc( i_size + 1 );
 413             break;
 414         case DVD_SUBPICTURE:                          /* DVD subpicture unit */
 415             p_free_subpic->p_data = malloc( i_size );
 416             break;
 417 #ifdef DEBUG
 418         default:
 419             intf_DbgMsg("error: unknown subpicture type %d\n", i_type );
 420             p_free_subpic->p_data   =  NULL;
 421             break;
 422 #endif
 423         }
 424
 425         if( p_free_subpic->p_data != NULL )
 426         {           /* Copy subpicture informations, set some default values */
 427             p_free_subpic->i_type                      = i_type;
 428             p_free_subpic->i_status                    = RESERVED_SUBPICTURE;
 429             p_free_subpic->i_size                      = i_size;
 430             p_free_subpic->i_x                         = 0;
 431             p_free_subpic->i_y                         = 0;
 432             p_free_subpic->i_width                     = 0;
 433             p_free_subpic->i_height                    = 0;
 434             p_free_subpic->i_horizontal_align          = CENTER_RALIGN;
 435             p_free_subpic->i_vertical_align            = CENTER_RALIGN;
 436         }
 437         else
 438         {
 439             /* Memory allocation failed : set subpicture as empty */
 440             p_free_subpic->i_type   =  EMPTY_SUBPICTURE;
 441             p_free_subpic->i_status =  FREE_SUBPICTURE;
 442             p_free_subpic =            NULL;
 443             intf_ErrMsg("warning: %s\n", strerror( ENOMEM ) );
 444         }
 445
 446 #ifdef DEBUG_VIDEO
 447         intf_DbgMsg("subpicture %p (in free subpicture slot)\n", p_free_subpic );
 448 #endif
 449         vlc_mutex_unlock( &p_vout->subpicture_lock );
 450         return( p_free_subpic );
 451     }
 452
 453     /* No free or destroyed subpicture could be found */
 454     intf_DbgMsg( "warning: heap is full\n" );
 455     vlc_mutex_unlock( &p_vout->subpicture_lock );
 456     return( NULL );
 457 }
 458
 459 /*****************************************************************************
 460  * vout_DestroySubPicture: remove a subpicture from the heap
 461  *****************************************************************************
 462  * This function frees a previously reserved subpicture.
 463  * It is meant to be used when the construction of a picture aborted.
 464  * This function does not need locking since reserved subpictures are ignored
 465  * by the output thread.
 466  *****************************************************************************/
 467 void vout_DestroySubPicture( vout_thread_t *p_vout, subpicture_t *p_subpic )
 468 {
 469 #ifdef DEBUG
 470    /* Check if status is valid */
 471    if( p_subpic->i_status != RESERVED_SUBPICTURE )
 472    {
 473        intf_DbgMsg("error: subpicture %p has invalid status %d\n",
 474                    p_subpic, p_subpic->i_status );
 475    }
 476 #endif
 477
 478     p_subpic->i_status = DESTROYED_SUBPICTURE;
 479
 480 #ifdef DEBUG_VIDEO
 481     intf_DbgMsg("subpicture %p\n", p_subpic);
 482 #endif
 483 }
 484
 485 /*****************************************************************************
 486  * vout_DisplayPicture: display a picture
 487  *****************************************************************************
 488  * Remove the reservation flag of a picture, which will cause it to be ready for
 489  * display. The picture won't be displayed until vout_DatePicture has been
 490  * called.
 491  *****************************************************************************/
 492 void  vout_DisplayPicture( vout_thread_t *p_vout, picture_t *p_pic )
 493 {
 494     vlc_mutex_lock( &p_vout->picture_lock );
 495     switch( p_pic->i_status )
 496     {
 497     case RESERVED_PICTURE:
 498         p_pic->i_status = RESERVED_DISP_PICTURE;
 499         break;
 500     case RESERVED_DATED_PICTURE:
 501         p_pic->i_status = READY_PICTURE;
 502         break;
 503 #ifdef DEBUG
 504     default:
 505         intf_DbgMsg("error: picture %p has invalid status %d\n", p_pic, p_pic->i_status );
 506         break;
 507 #endif
 508     }
 509
 510 #ifdef DEBUG_VIDEO
 511     intf_DbgMsg("picture %p\n", p_pic);
 512 #endif
 513     vlc_mutex_unlock( &p_vout->picture_lock );
 514 }
 515
 516 /*****************************************************************************
 517  * vout_DatePicture: date a picture
 518  *****************************************************************************
 519  * Remove the reservation flag of a picture, which will cause it to be ready for
 520  * display. The picture won't be displayed until vout_DisplayPicture has been
 521  * called.
 522  *****************************************************************************/
 523 void  vout_DatePicture( vout_thread_t *p_vout, picture_t *p_pic, mtime_t date )
 524 {
 525 #ifdef DEBUG_VIDEO
 526     char        psz_date[MSTRTIME_MAX_SIZE];                         /* date */
 527 #endif
 528
 529     vlc_mutex_lock( &p_vout->picture_lock );
 530     p_pic->date = date;
 531     switch( p_pic->i_status )
 532     {
 533     case RESERVED_PICTURE:
 534         p_pic->i_status = RESERVED_DATED_PICTURE;
 535         break;
 536     case RESERVED_DISP_PICTURE:
 537         p_pic->i_status = READY_PICTURE;
 538         break;
 539 #ifdef DEBUG
 540     default:
 541         intf_DbgMsg("error: picture %p has invalid status %d\n", p_pic, p_pic->i_status );
 542         break;
 543 #endif
 544     }
 545
 546 #ifdef DEBUG_VIDEO
 547     intf_DbgMsg("picture %p, display date: %s\n", p_pic, mstrtime( psz_date, p_pic->date) );
 548 #endif
 549     vlc_mutex_unlock( &p_vout->picture_lock );
 550 }
 551
 552 /*****************************************************************************
 553  * vout_CreatePicture: allocate a picture in the video output heap.
 554  *****************************************************************************
 555  * This function create a reserved image in the video output heap.
 556  * A null pointer is returned if the function fails. This method provides an
 557  * already allocated zone of memory in the picture data fields. It needs locking
 558  * since several pictures can be created by several producers threads.
 559  *****************************************************************************/
 560 picture_t *vout_CreatePicture( vout_thread_t *p_vout, int i_type,
 561                                int i_width, int i_height )
 562 {
 563     int         i_picture;                                  /* picture index */
 564     int         i_chroma_width = 0;                          /* chroma width */
 565     picture_t * p_free_picture = NULL;                 /* first free picture */
 566     picture_t * p_destroyed_picture = NULL;       /* first destroyed picture */
 567
 568     /* Get lock */
 569     vlc_mutex_lock( &p_vout->picture_lock );
 570
 571     /*
 572      * Look for an empty place
 573      */
 574     for( i_picture = 0; i_picture < VOUT_MAX_PICTURES; i_picture++ )
 575     {
 576         if( p_vout->p_picture[i_picture].i_status == DESTROYED_PICTURE )
 577         {
 578             /* Picture is marked for destruction, but is still allocated - note
 579              * that if width and type are the same for two pictures, chroma_width
 580              * should also be the same */
 581             if( (p_vout->p_picture[i_picture].i_type           == i_type)   &&
 582                 (p_vout->p_picture[i_picture].i_height         == i_height) &&
 583                 (p_vout->p_picture[i_picture].i_width          == i_width) )
 584             {
 585                 /* Memory size do match : memory will not be reallocated, and function
 586                  * can end immediately - this is the best possible case, since no
 587                  * memory allocation needs to be done */
 588                 p_vout->p_picture[i_picture].i_status = RESERVED_PICTURE;
 589                 p_vout->i_pictures++;
 590 #ifdef DEBUG_VIDEO
 591                 intf_DbgMsg("picture %p (in destroyed picture slot)\n",
 592                             &p_vout->p_picture[i_picture] );
 593 #endif
 594                 vlc_mutex_unlock( &p_vout->picture_lock );
 595                 return( &p_vout->p_picture[i_picture] );
 596             }
 597             else if( p_destroyed_picture == NULL )
 598             {
 599                 /* Memory size do not match, but picture index will be kept in
 600                  * case no other place are left */
 601                 p_destroyed_picture = &p_vout->p_picture[i_picture];
 602             }
 603         }
 604         else if( (p_free_picture == NULL) &&
 605                  (p_vout->p_picture[i_picture].i_status == FREE_PICTURE ))
 606         {
 607             /* Picture is empty and ready for allocation */
 608             p_free_picture = &p_vout->p_picture[i_picture];
 609         }
 610     }
 611
 612     /* If no free picture is available, use a destroyed picture */
 613     if( (p_free_picture == NULL) && (p_destroyed_picture != NULL ) )
 614     {
 615         /* No free picture or matching destroyed picture has been found, but
 616          * a destroyed picture is still avalaible */
 617         free( p_destroyed_picture->p_data );
 618         p_free_picture = p_destroyed_picture;
 619     }
 620
 621     /*
 622      * Prepare picture
 623      */
 624     if( p_free_picture != NULL )
 625     {
 626         /* Allocate memory */
 627         switch( i_type )
 628         {
 629         case YUV_420_PICTURE:        /* YUV 420: 1,1/4,1/4 samples per pixel */
 630             i_chroma_width = i_width / 2;
 631             p_free_picture->p_data = malloc( i_height * i_chroma_width * 3 * sizeof( yuv_data_t ) );
 632             p_free_picture->p_y = (yuv_data_t *)p_free_picture->p_data;
 633             p_free_picture->p_u = (yuv_data_t *)p_free_picture->p_data +i_height*i_chroma_width*4/2;
 634             p_free_picture->p_v = (yuv_data_t *)p_free_picture->p_data +i_height*i_chroma_width*5/2;
 635             break;
 636         case YUV_422_PICTURE:        /* YUV 422: 1,1/2,1/2 samples per pixel */
 637             i_chroma_width = i_width / 2;
 638             p_free_picture->p_data = malloc( i_height * i_chroma_width * 4 * sizeof( yuv_data_t ) );
 639             p_free_picture->p_y = (yuv_data_t *)p_free_picture->p_data;
 640             p_free_picture->p_u = (yuv_data_t *)p_free_picture->p_data +i_height*i_chroma_width*2;
 641             p_free_picture->p_v = (yuv_data_t *)p_free_picture->p_data +i_height*i_chroma_width*3;
 642             break;
 643         case YUV_444_PICTURE:            /* YUV 444: 1,1,1 samples per pixel */
 644             i_chroma_width = i_width;
 645             p_free_picture->p_data = malloc( i_height * i_chroma_width * 3 * sizeof( yuv_data_t ) );
 646             p_free_picture->p_y = (yuv_data_t *)p_free_picture->p_data;
 647             p_free_picture->p_u = (yuv_data_t *)p_free_picture->p_data +i_height*i_chroma_width;
 648             p_free_picture->p_v = (yuv_data_t *)p_free_picture->p_data +i_height*i_chroma_width*2;
 649             break;
 650 #ifdef DEBUG
 651         default:
 652             intf_DbgMsg("error: unknown picture type %d\n", i_type );
 653             p_free_picture->p_data   =  NULL;
 654             break;
 655 #endif
 656         }
 657
 658         if( p_free_picture->p_data != NULL )
 659         {
 660             /* Copy picture informations, set some default values */
 661             p_free_picture->i_type                      = i_type;
 662             p_free_picture->i_status                    = RESERVED_PICTURE;
 663             p_free_picture->i_matrix_coefficients       = 1;
 664             p_free_picture->i_width                     = i_width;
 665             p_free_picture->i_height                    = i_height;
 666             p_free_picture->i_chroma_width              = i_chroma_width;
 667             p_free_picture->i_display_horizontal_offset = 0;
 668             p_free_picture->i_display_vertical_offset   = 0;
 669             p_free_picture->i_display_width             = i_width;
 670             p_free_picture->i_display_height            = i_height;
 671             p_free_picture->i_aspect_ratio              = AR_SQUARE_PICTURE;
 672             p_free_picture->i_refcount                  = 0;
 673             p_vout->i_pictures++;
 674         }
 675         else
 676         {
 677             /* Memory allocation failed : set picture as empty */
 678             p_free_picture->i_type   =  EMPTY_PICTURE;
 679             p_free_picture->i_status =  FREE_PICTURE;
 680             p_free_picture =            NULL;
 681             intf_ErrMsg("warning: %s\n", strerror( ENOMEM ) );
 682         }
 683
 684 #ifdef DEBUG_VIDEO
 685         intf_DbgMsg("picture %p (in free picture slot)\n", p_free_picture );
 686 #endif
 687         vlc_mutex_unlock( &p_vout->picture_lock );
 688         return( p_free_picture );
 689     }
 690
 691     /* No free or destroyed picture could be found */
 692     intf_DbgMsg( "warning: heap is full\n" );
 693     vlc_mutex_unlock( &p_vout->picture_lock );
 694     return( NULL );
 695 }
 696
 697 /*****************************************************************************
 698  * vout_DestroyPicture: remove a permanent or reserved picture from the heap
 699  *****************************************************************************
 700  * This function frees a previously reserved picture or a permanent
 701  * picture. It is meant to be used when the construction of a picture aborted.
 702  * Note that the picture will be destroyed even if it is linked !
 703  *****************************************************************************/
 704 void vout_DestroyPicture( vout_thread_t *p_vout, picture_t *p_pic )
 705 {
 706    vlc_mutex_lock( &p_vout->picture_lock );
 707
 708 #ifdef DEBUG
 709    /* Check if picture status is valid */
 710    if( (p_pic->i_status != RESERVED_PICTURE) &&
 711        (p_pic->i_status != RESERVED_DATED_PICTURE) &&
 712        (p_pic->i_status != RESERVED_DISP_PICTURE) )
 713    {
 714        intf_DbgMsg("error: picture %p has invalid status %d\n", p_pic, p_pic->i_status );
 715    }
 716 #endif
 717
 718    p_pic->i_status = DESTROYED_PICTURE;
 719    p_vout->i_pictures--;
 720
 721 #ifdef DEBUG_VIDEO
 722    intf_DbgMsg("picture %p\n", p_pic);
 723 #endif
 724    vlc_mutex_unlock( &p_vout->picture_lock );
 725 }
 726
 727 /*****************************************************************************
 728  * vout_LinkPicture: increment reference counter of a picture
 729  *****************************************************************************
 730  * This function increment the reference counter of a picture in the video
 731  * heap. It needs a lock since several producer threads can access the picture.
 732  *****************************************************************************/
 733 void vout_LinkPicture( vout_thread_t *p_vout, picture_t *p_pic )
 734 {
 735     vlc_mutex_lock( &p_vout->picture_lock );
 736     p_pic->i_refcount++;
 737
 738 #ifdef DEBUG_VIDEO
 739     intf_DbgMsg("picture %p refcount=%d\n", p_pic, p_pic->i_refcount );
 740 #endif
 741
 742     vlc_mutex_unlock( &p_vout->picture_lock );
 743 }
 744
 745 /*****************************************************************************
 746  * vout_UnlinkPicture: decrement reference counter of a picture
 747  *****************************************************************************
 748  * This function decrement the reference counter of a picture in the video heap.
 749  *****************************************************************************/
 750 void vout_UnlinkPicture( vout_thread_t *p_vout, picture_t *p_pic )
 751 {
 752     vlc_mutex_lock( &p_vout->picture_lock );
 753     p_pic->i_refcount--;
 754
 755 #ifdef DEBUG_VIDEO
 756     if( p_pic->i_refcount < 0 )
 757     {
 758         intf_DbgMsg("error: refcount < 0\n");
 759         p_pic->i_refcount = 0;
 760     }
 761 #endif
 762
 763     if( (p_pic->i_refcount == 0) && (p_pic->i_status == DISPLAYED_PICTURE) )
 764     {
 765         p_pic->i_status = DESTROYED_PICTURE;
 766         p_vout->i_pictures--;
 767     }
 768
 769 #ifdef DEBUG_VIDEO
 770     intf_DbgMsg("picture %p refcount=%d\n", p_pic, p_pic->i_refcount );
 771 #endif
 772
 773     vlc_mutex_unlock( &p_vout->picture_lock );
 774 }
 775
 776 /*****************************************************************************
 777  * vout_SetBuffers: set buffers adresses
 778  *****************************************************************************
 779  * This function is called by system drivers to set buffers video memory
 780  * adresses.
 781  *****************************************************************************/
 782 void vout_SetBuffers( vout_thread_t *p_vout, void *p_buf1, void *p_buf2 )
 783 {
 784     /* No picture previously */
 785     p_vout->p_buffer[0].i_pic_x =         0;
 786     p_vout->p_buffer[0].i_pic_y =         0;
 787     p_vout->p_buffer[0].i_pic_width =     0;
 788     p_vout->p_buffer[0].i_pic_height =    0;
 789     p_vout->p_buffer[1].i_pic_x =         0;
 790     p_vout->p_buffer[1].i_pic_y =         0;
 791     p_vout->p_buffer[1].i_pic_width =     0;
 792     p_vout->p_buffer[1].i_pic_height =    0;
 793
 794     /* The first area covers all the screen */
 795     p_vout->p_buffer[0].i_areas =                 1;
 796     p_vout->p_buffer[0].pi_area_begin[0] =        0;
 797     p_vout->p_buffer[0].pi_area_end[0] =          p_vout->i_height - 1;
 798     p_vout->p_buffer[1].i_areas =                 1;
 799     p_vout->p_buffer[1].pi_area_begin[0] =        0;
 800     p_vout->p_buffer[1].pi_area_end[0] =          p_vout->i_height - 1;
 801
 802     /* Set adresses */
 803     p_vout->p_buffer[0].p_data = p_buf1;
 804     p_vout->p_buffer[1].p_data = p_buf2;
 805 }
 806
 807 /*****************************************************************************
 808  * vout_Pixel2RGB: return red, green and blue from pixel value
 809  *****************************************************************************
 810  * Return color values, in 0-255 range, of the decomposition of a pixel. This
 811  * is a slow routine and should only be used for initialization phase.
 812  *****************************************************************************/
 813 void vout_Pixel2RGB( vout_thread_t *p_vout, u32 i_pixel, int *pi_red, int *pi_green, int *pi_blue )
 814 {
 815     *pi_red =   i_pixel & p_vout->i_red_mask;
 816     *pi_green = i_pixel & p_vout->i_green_mask;
 817     *pi_blue =  i_pixel & p_vout->i_blue_mask;
 818 }
 819
 820 /* following functions are local */
 821
 822 /*****************************************************************************
 823  * BinaryLog: computes the base 2 log of a binary value
 824  *****************************************************************************
 825  * This functions is used by MaskToShift, to get a bit index from a binary
 826  * value.
 827  *****************************************************************************/
 828 static int BinaryLog(u32 i)
 829 {
 830     int i_log;
 831
 832     i_log = 0;
 833     if (i & 0xffff0000)
 834     {
 835         i_log = 16;
 836     }
 837     if (i & 0xff00ff00)
 838     {
 839         i_log += 8;
 840     }
 841     if (i & 0xf0f0f0f0)
 842     {
 843         i_log += 4;
 844     }
 845     if (i & 0xcccccccc)
 846     {
 847         i_log += 2;
 848     }
 849     if (i & 0xaaaaaaaa)
 850     {
 851         i_log++;
 852     }
 853     if (i != ((u32)1 << i_log))
 854     {
 855         intf_ErrMsg("internal error: binary log overflow\n");
 856     }
 857
 858     return( i_log );
 859 }
 860
 861 /*****************************************************************************
 862  * MaskToShift: transform a color mask into right and left shifts
 863  *****************************************************************************
 864  * This function is used for obtaining color shifts from masks.
 865  *****************************************************************************/
 866 static void MaskToShift( int *pi_left, int *pi_right, u32 i_mask )
 867 {
 868     u32 i_low, i_high;                 /* lower hand higher bits of the mask */
 869
 870     /* Get bits */
 871     i_low =  i_mask & (- i_mask);                   /* lower bit of the mask */
 872     i_high = i_mask + i_low;                       /* higher bit of the mask */
 873
 874     /* Transform bits into an index */
 875     i_low =  BinaryLog (i_low);
 876     i_high = BinaryLog (i_high);
 877
 878     /* Update pointers and return */
 879     *pi_left =   i_low;
 880     *pi_right = (8 - i_high + i_low);
 881 }
 882
 883 /*****************************************************************************
 884  * InitThread: initialize video output thread
 885  *****************************************************************************
 886  * This function is called from RunThread and performs the second step of the
 887  * initialization. It returns 0 on success. Note that the thread's flag are not
 888  * modified inside this function.
 889  *****************************************************************************/
 890 static int InitThread( vout_thread_t *p_vout )
 891 {
 892     /* Update status */
 893     intf_DbgMsg("\n");
 894     *p_vout->pi_status = THREAD_START;
 895
 896    /* Initialize output method - this function issues its own error messages */
 897     if( p_vout->p_sys_init( p_vout ) )
 898     {
 899         return( 1 );
 900     }
 901
 902     /* Initialize convertion tables and functions */
 903     if( vout_InitYUV( p_vout ) )
 904     {
 905         intf_ErrMsg("error: can't allocate YUV translation tables\n");
 906         return( 1 );
 907     }
 908
 909     /* Mark thread as running and return */
 910     p_vout->b_active =          1;
 911     *p_vout->pi_status =        THREAD_READY;
 912     intf_DbgMsg("thread ready\n");
 913     return( 0 );
 914 }
 915
 916 /*****************************************************************************
 917  * RunThread: video output thread
 918  *****************************************************************************
 919  * Video output thread. This function does only returns when the thread is
 920  * terminated. It handles the pictures arriving in the video heap and the
 921  * display device events.
 922  *****************************************************************************/
 923 static void RunThread( vout_thread_t *p_vout)
 924 {
 925     /* XXX?? welcome to gore land */
 926     static int i_trash_count = 0;
 927     static mtime_t last_display_date = 0;
 928
 929     int             i_index;                                /* index in heap */
 930     mtime_t         current_date;                            /* current date */
 931     mtime_t         display_date;                            /* display date */
 932     boolean_t       b_display;                               /* display flag */
 933     picture_t *     p_pic;                                /* picture pointer */
 934     subpicture_t *  p_subpic;                          /* subpicture pointer */
 935
 936     /*
 937      * Initialize thread
 938      */
 939     p_vout->b_error = InitThread( p_vout );
 940     if( p_vout->b_error )
 941     {
 942         DestroyThread( p_vout, THREAD_ERROR );
 943         return;
 944     }
 945     intf_DbgMsg("\n");
 946
 947     /*
 948      * Main loop - it is not executed if an error occured during
 949      * initialization
 950      */
 951     while( (!p_vout->b_die) && (!p_vout->b_error) )
 952     {
 953         /* Initialize loop variables */
 954         p_pic =         NULL;
 955         p_subpic =      NULL;
 956         display_date =  0;
 957         current_date =  mdate();
 958
 959         /*
 960          * Find the picture to display - this operation does not need lock,
 961          * since only READY_PICTUREs are handled
 962          */
 963         for( i_index = 0; i_index < VOUT_MAX_PICTURES; i_index++ )
 964         {
 965             if( (p_vout->p_picture[i_index].i_status == READY_PICTURE) &&
 966             ( (p_pic == NULL) ||
 967               (p_vout->p_picture[i_index].date < display_date) ) )
 968             {
 969                 p_pic = &p_vout->p_picture[i_index];
 970                 display_date = p_pic->date;
 971             }
 972         }
 973
 974         if( p_pic )
 975         {
 976 #ifdef STATS
 977             /* Computes FPS rate */
 978             p_vout->p_fps_sample[ p_vout->c_fps_samples++ % VOUT_FPS_SAMPLES ] = display_date;
 979 #endif
 980 /* XXX?? */
 981 i_trash_count++;
 982 //fprintf( stderr, "gap : %Ld\n", display_date-last_display_date );
 983 last_display_date = display_date;
 984 #if 1
 985             if( display_date < current_date && i_trash_count > 4 )
 986             {
 987                 /* Picture is late: it will be destroyed and the thread
 988                  * will sleep and go to next picture */
 989
 990                 vlc_mutex_lock( &p_vout->picture_lock );
 991                 if( p_pic->i_refcount )
 992                 {
 993                     p_pic->i_status = DISPLAYED_PICTURE;
 994                 }
 995                 else
 996                 {
 997                     p_pic->i_status = DESTROYED_PICTURE;
 998                     p_vout->i_pictures--;
 999                 }
1000                 intf_DbgMsg( "warning: late picture %p skipped refcount=%d\n", p_pic, p_pic->i_refcount );
1001                 vlc_mutex_unlock( &p_vout->picture_lock );
1002
1003                 /* Update synchronization information as if display delay
1004                  * was 0 */
1005                 Synchronize( p_vout, display_date - current_date );
1006
1007                 p_pic =         NULL;
1008                 display_date =  0;
1009                 i_trash_count = 0;
1010             }
1011             else
1012 #endif
1013                 if( display_date > current_date + VOUT_DISPLAY_DELAY )
1014             {
1015                 /* A picture is ready to be rendered, but its rendering date
1016                  * is far from the current one so the thread will perform an
1017                  * empty loop as if no picture were found. The picture state
1018                  * is unchanged */
1019                 p_pic =         NULL;
1020                 display_date =  0;
1021             }
1022             else
1023             {
1024                 /* Picture will be displayed, update synchronization
1025                  * information */
1026                 Synchronize( p_vout, display_date - current_date );
1027             }
1028         }
1029         /*
1030          * Find the subpictures to display - this operation does not need
1031          * lock, since only READY_SUBPICTURE are handled. If no picture
1032          * has been selected, display_date will depend on the subpicture.
1033          * We get an easily parsable chained list of subpictures which
1034          * ends with NULL since p_subpic was initialized to NULL.
1035          */
1036         for( i_index = 0; i_index < VOUT_MAX_SUBPICTURES; i_index++ )
1037         {
1038             if( p_vout->p_subpicture[i_index].i_status == READY_SUBPICTURE )
1039             {
1040                 p_vout->p_subpicture[i_index].p_next = p_subpic;
1041                 p_subpic = &p_vout->p_subpicture[i_index];
1042             }
1043         }
1044
1045         /*
1046          * Perform rendering, sleep and display rendered picture
1047          */
1048         if( p_pic )                        /* picture and perhaps subpicture */
1049         {
1050             b_display = p_vout->b_active;
1051             p_vout->last_display_date = display_date;
1052
1053             if( b_display )
1054             {
1055                 /* Set picture dimensions and clear buffer */
1056                 SetBufferPicture( p_vout, p_pic );
1057
1058                 /* Render picture and informations */
1059                 RenderPicture( p_vout, p_pic );
1060                 if( p_vout->b_info )
1061                 {
1062                     RenderPictureInfo( p_vout, p_pic );
1063                     RenderInfo( p_vout );
1064                 }
1065             }
1066
1067             /* Remove picture from heap */
1068             vlc_mutex_lock( &p_vout->picture_lock );
1069             if( p_pic->i_refcount )
1070             {
1071                 p_pic->i_status = DISPLAYED_PICTURE;
1072             }
1073             else
1074             {
1075                 p_pic->i_status = DESTROYED_PICTURE;
1076                 p_vout->i_pictures--;
1077             }
1078             vlc_mutex_unlock( &p_vout->picture_lock );
1079
1080             /* Render interface and subpicture */
1081             if( b_display && p_vout->b_interface )
1082             {
1083                 RenderInterface( p_vout );
1084             }
1085             if( p_subpic )
1086             {
1087                 if( b_display )
1088                 {
1089                     RenderSubPicture( p_vout, p_subpic );
1090                 }
1091
1092                 /* Remove subpicture from heap */
1093                 /*vlc_mutex_lock( &p_vout->subpicture_lock );
1094                 p_subpic->i_status = DESTROYED_SUBPICTURE;
1095                 vlc_mutex_unlock( &p_vout->subpicture_lock );*/
1096             }
1097
1098         }
1099 #if 0
1100         else if( p_subpic )                              /* subpicture alone */
1101         {
1102             b_display = p_vout->b_active;
1103             p_vout->last_display_date = display_date;
1104
1105             if( b_display )
1106             {
1107                 /* Clear buffer */
1108                 SetBufferPicture( p_vout, NULL );
1109
1110                 /* Render informations, interface and subpicture */
1111                 if( p_vout->b_info )
1112                 {
1113                     RenderInfo( p_vout );
1114                 }
1115                 if( p_vout->b_interface )
1116                 {
1117                     RenderInterface( p_vout );
1118                 }
1119                 RenderSubPicture( p_vout, p_subpic );
1120             }
1121
1122             /* Remove subpicture from heap */
1123             /*vlc_mutex_lock( &p_vout->subpicture_lock );
1124             p_subpic->i_status = DESTROYED_SUBPICTURE;
1125             vlc_mutex_unlock( &p_vout->subpicture_lock );*/
1126         }
1127 #endif
1128         else if( p_vout->b_active )        /* idle or interface screen alone */
1129         {
1130             if( p_vout->b_interface && 0 /* && XXX?? intf_change */ )
1131             {
1132                 /* Interface has changed, so a new rendering is required - force
1133                  * it by setting last idle date to 0 */
1134                 p_vout->last_idle_date = 0;
1135             }
1136
1137             /* Render idle screen and update idle date, then render interface if
1138              * required */
1139             b_display = RenderIdle( p_vout );
1140             if( b_display )
1141             {
1142                 p_vout->last_idle_date = current_date;
1143                 if( p_vout->b_interface )
1144                 {
1145                     RenderInterface( p_vout );
1146                 }
1147             }
1148
1149         }
1150         else
1151         {
1152             b_display = 0;
1153         }
1154
1155         /*
1156          * Sleep, wake up and display rendered picture
1157          */
1158
1159 #ifdef STATS
1160         /* Store render time */
1161         p_vout->render_time = mdate() - current_date;
1162 #endif
1163
1164         /* Give back change lock */
1165         vlc_mutex_unlock( &p_vout->change_lock );
1166
1167         /* Sleep a while or until a given date */
1168         if( display_date != 0 )
1169         {
1170             mwait( display_date );
1171         }
1172         else
1173         {
1174             msleep( VOUT_IDLE_SLEEP );
1175         }
1176
1177         /* On awakening, take back lock and send immediately picture to display,
1178          * then swap buffers */
1179         vlc_mutex_lock( &p_vout->change_lock );
1180 #ifdef DEBUG_VIDEO
1181         intf_DbgMsg( "picture %p, subpicture %p in buffer %d, display=%d\n", p_pic, p_subpic,
1182                      p_vout->i_buffer_index, b_display && !(p_vout->i_changes & VOUT_NODISPLAY_CHANGE) );
1183 #endif
1184         if( b_display && !(p_vout->i_changes & VOUT_NODISPLAY_CHANGE) )
1185         {
1186             p_vout->p_sys_display( p_vout );
1187             p_vout->i_buffer_index = ++p_vout->i_buffer_index & 1;
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     /* Close plugin */
1289     TrashPlugin( p_vout->vout_plugin );
1290
1291     /* Free structure */
1292     free( p_vout );
1293     *pi_status = i_status;
1294 }
1295
1296 /*****************************************************************************
1297  * Print: print simple text on a picture
1298  *****************************************************************************
1299  * This function will print a simple text on the picture. It is designed to
1300  * print debugging or general informations.
1301  *****************************************************************************/
1302 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 )
1303 {
1304     int                 i_text_height;                  /* total text height */
1305     int                 i_text_width;                    /* total text width */
1306
1307     /* Update upper left coordinates according to alignment */
1308     vout_TextSize( p_vout->p_default_font, 0, psz_text, &i_text_width, &i_text_height );
1309     if( !Align( p_vout, &i_x, &i_y, i_text_width, i_text_height, i_h_align, i_v_align ) )
1310     {
1311         /* Set area and print text */
1312         SetBufferArea( p_vout, i_x, i_y, i_text_width, i_text_height );
1313         vout_Print( p_vout->p_default_font, p_vout->p_buffer[ p_vout->i_buffer_index ].p_data +
1314                     i_y * p_vout->i_bytes_per_line + i_x * p_vout->i_bytes_per_pixel,
1315                     p_vout->i_bytes_per_pixel, p_vout->i_bytes_per_line,
1316                     p_vout->i_white_pixel, 0, 0,
1317                     0, psz_text );
1318     }
1319 }
1320
1321 /*****************************************************************************
1322  * SetBufferArea: activate an area in current buffer
1323  *****************************************************************************
1324  * This function is called when something is rendered on the current buffer.
1325  * It set the area as active and prepare it to be cleared on next rendering.
1326  * Pay attention to the fact that in this functions, i_h is in fact the end y
1327  * coordinate of the new area.
1328  *****************************************************************************/
1329 static void SetBufferArea( vout_thread_t *p_vout, int i_x, int i_y, int i_w, int i_h )
1330 {
1331     vout_buffer_t *     p_buffer;                          /* current buffer */
1332     int                 i_area_begin, i_area_end; /* area vertical extension */
1333     int                 i_area, i_area_copy;                   /* area index */
1334     int                 i_area_shift;            /* shift distance for areas */
1335
1336     /* Choose buffer and modify h to end of area position */
1337     p_buffer =  &p_vout->p_buffer[ p_vout->i_buffer_index ];
1338     i_h +=      i_y - 1;
1339
1340     /*
1341      * Remove part of the area which is inside the picture - this is done
1342      * by calling again SetBufferArea with the correct areas dimensions.
1343      */
1344     if( (i_x >= p_buffer->i_pic_x) && (i_x + i_w <= p_buffer->i_pic_x + p_buffer->i_pic_width) )
1345     {
1346         i_area_begin =  p_buffer->i_pic_y;
1347         i_area_end =    i_area_begin + p_buffer->i_pic_height - 1;
1348
1349         if( ((i_y >= i_area_begin) && (i_y <= i_area_end)) ||
1350             ((i_h >= i_area_begin) && (i_h <= i_area_end)) ||
1351             ((i_y <  i_area_begin) && (i_h > i_area_end)) )
1352         {
1353             /* Keep the stripe above the picture, if any */
1354             if( i_y < i_area_begin )
1355             {
1356                 SetBufferArea( p_vout, i_x, i_y, i_w, i_area_begin - i_y );
1357             }
1358             /* Keep the stripe below the picture, if any */
1359             if( i_h > i_area_end )
1360             {
1361                 SetBufferArea( p_vout, i_x, i_area_end, i_w, i_h - i_area_end );
1362             }
1363             return;
1364         }
1365     }
1366
1367     /* Skip some extensions until interesting areas */
1368     for( i_area = 0;
1369          (i_area < p_buffer->i_areas) &&
1370              (p_buffer->pi_area_end[i_area] + 1 <= i_y);
1371          i_area++ )
1372     {
1373         ;
1374     }
1375
1376     if( i_area == p_buffer->i_areas )
1377     {
1378         /* New area is below all existing ones: just add it at the end of the
1379          * array, if possible - else, append it to the last one */
1380         if( i_area < VOUT_MAX_AREAS )
1381         {
1382             p_buffer->pi_area_begin[i_area] = i_y;
1383             p_buffer->pi_area_end[i_area] = i_h;
1384             p_buffer->i_areas++;
1385         }
1386         else
1387         {
1388 #ifdef DEBUG_VIDEO
1389             intf_DbgMsg("areas overflow\n");
1390 #endif
1391             p_buffer->pi_area_end[VOUT_MAX_AREAS - 1] = i_h;
1392         }
1393     }
1394     else
1395     {
1396         i_area_begin =  p_buffer->pi_area_begin[i_area];
1397         i_area_end =    p_buffer->pi_area_end[i_area];
1398
1399         if( i_y < i_area_begin )
1400         {
1401             if( i_h >= i_area_begin - 1 )
1402             {
1403                 /* Extend area above */
1404                 p_buffer->pi_area_begin[i_area] = i_y;
1405             }
1406             else
1407             {
1408                 /* Create a new area above : merge last area if overflow, then
1409                  * move all old areas down */
1410                 if( p_buffer->i_areas == VOUT_MAX_AREAS )
1411                 {
1412 #ifdef DEBUG_VIDEO
1413                     intf_DbgMsg("areas overflow\n");
1414 #endif
1415                     p_buffer->pi_area_end[VOUT_MAX_AREAS - 2] = p_buffer->pi_area_end[VOUT_MAX_AREAS - 1];
1416                 }
1417                 else
1418                 {
1419                     p_buffer->i_areas++;
1420                 }
1421                 for( i_area_copy = p_buffer->i_areas - 1; i_area_copy > i_area; i_area_copy-- )
1422                 {
1423                     p_buffer->pi_area_begin[i_area_copy] = p_buffer->pi_area_begin[i_area_copy - 1];
1424                     p_buffer->pi_area_end[i_area_copy] =   p_buffer->pi_area_end[i_area_copy - 1];
1425                 }
1426                 p_buffer->pi_area_begin[i_area] = i_y;
1427                 p_buffer->pi_area_end[i_area] = i_h;
1428                 return;
1429             }
1430         }
1431         if( i_h > i_area_end )
1432         {
1433             /* Find further areas which can be merged with the new one */
1434             for( i_area_copy = i_area + 1;
1435                  (i_area_copy < p_buffer->i_areas) &&
1436                      (p_buffer->pi_area_begin[i_area] <= i_h);
1437                  i_area_copy++ )
1438             {
1439                 ;
1440             }
1441             i_area_copy--;
1442
1443             if( i_area_copy != i_area )
1444             {
1445                 /* Merge with last possible areas */
1446                 p_buffer->pi_area_end[i_area] = MAX( i_h, p_buffer->pi_area_end[i_area_copy] );
1447
1448                 /* Shift lower areas upward */
1449                 i_area_shift = i_area_copy - i_area;
1450                 p_buffer->i_areas -= i_area_shift;
1451                 for( i_area_copy = i_area + 1; i_area_copy < p_buffer->i_areas; i_area_copy++ )
1452                 {
1453                     p_buffer->pi_area_begin[i_area_copy] = p_buffer->pi_area_begin[i_area_copy + i_area_shift];
1454                     p_buffer->pi_area_end[i_area_copy] =   p_buffer->pi_area_end[i_area_copy + i_area_shift];
1455                 }
1456             }
1457             else
1458             {
1459                 /* Extend area below */
1460                 p_buffer->pi_area_end[i_area] = i_h;
1461             }
1462         }
1463     }
1464 }
1465
1466 /*****************************************************************************
1467  * SetBufferPicture: clear buffer and set picture area
1468  *****************************************************************************
1469  * This function is called before any rendering. It clears the current
1470  * rendering buffer and set the new picture area. If the picture pointer is
1471  * NULL, then no picture area is defined. Floating operations are avoided since
1472  * some MMX calculations may follow.
1473  *****************************************************************************/
1474 static void SetBufferPicture( vout_thread_t *p_vout, picture_t *p_pic )
1475 {
1476     vout_buffer_t *     p_buffer;                          /* current buffer */
1477     int                 i_pic_x, i_pic_y;                /* picture position */
1478     int                 i_pic_width, i_pic_height;     /* picture dimensions */
1479     int                 i_old_pic_y, i_old_pic_height;   /* old picture area */
1480     int                 i_vout_width, i_vout_height;   /* display dimensions */
1481     int                 i_area;                                /* area index */
1482     int                 i_data_index;                     /* area data index */
1483     int                 i_data_size;   /* area data size, in 256 bytes blocs */
1484     u64 *               p_data;                   /* area data, for clearing */
1485     byte_t *            p_data8;           /* area data, for clearing (slow) */
1486
1487     /* Choose buffer and set display dimensions */
1488     p_buffer =          &p_vout->p_buffer[ p_vout->i_buffer_index ];
1489     i_vout_width =      p_vout->i_width;
1490     i_vout_height =     p_vout->i_height;
1491
1492     /*
1493      * Computes new picture size
1494      */
1495     if( p_pic != NULL )
1496     {
1497         /* Try horizontal scaling first - width must be a mutiple of 16 */
1498         i_pic_width = (( p_vout->b_scale || (p_pic->i_width > i_vout_width)) ?
1499                        i_vout_width : p_pic->i_width) & ~0xf;
1500         switch( p_pic->i_aspect_ratio )
1501         {
1502         case AR_3_4_PICTURE:
1503             i_pic_height = i_pic_width * 3 / 4;
1504             break;
1505         case AR_16_9_PICTURE:
1506             i_pic_height = i_pic_width * 9 / 16;
1507             break;
1508         case AR_221_1_PICTURE:
1509             i_pic_height = i_pic_width * 100 / 221;
1510             break;
1511         case AR_SQUARE_PICTURE:
1512         default:
1513             i_pic_height = p_pic->i_height * i_pic_width / p_pic->i_width;
1514             break;
1515         }
1516
1517         /* If picture dimensions using horizontal scaling are too large, use
1518          * vertical scaling. Since width must be a multiple of 16, height is
1519          * adjusted again after. */
1520         if( i_pic_height > i_vout_height )
1521         {
1522             i_pic_height = ( p_vout->b_scale || (p_pic->i_height > i_vout_height)) ?
1523                 i_vout_height : p_pic->i_height;
1524             switch( p_pic->i_aspect_ratio )
1525             {
1526             case AR_3_4_PICTURE:
1527                 i_pic_width = (i_pic_height * 4 / 3) & ~0xf;
1528                 i_pic_height = i_pic_width * 3 / 4;
1529                 break;
1530             case AR_16_9_PICTURE:
1531                 i_pic_width = (i_pic_height * 16 / 9) & ~0xf;
1532                 i_pic_height = i_pic_width * 9 / 16;
1533                 break;
1534             case AR_221_1_PICTURE:
1535                 i_pic_width = (i_pic_height * 221 / 100) & ~0xf;
1536                 i_pic_height = i_pic_width * 100 / 221;
1537                 break;
1538             case AR_SQUARE_PICTURE:
1539             default:
1540                 i_pic_width = (p_pic->i_width * i_pic_height / p_pic->i_height) & ~0xf;
1541                 i_pic_height = p_pic->i_height * i_pic_width / p_pic->i_width;
1542                 break;
1543             }
1544         }
1545
1546         /* Set picture position */
1547         i_pic_x = (p_vout->i_width - i_pic_width) / 2;
1548         i_pic_y = (p_vout->i_height - i_pic_height) / 2;
1549     }
1550     else
1551     {
1552         /* No picture: size is 0 */
1553         i_pic_x =       0;
1554         i_pic_y =       0;
1555         i_pic_width =   0;
1556         i_pic_height =  0;
1557     }
1558
1559     /*
1560      * Set new picture size - if is is smaller than the previous one, clear
1561      * around it. Since picture are centered, only their size is tested.
1562      */
1563     if( (p_buffer->i_pic_width > i_pic_width) || (p_buffer->i_pic_height > i_pic_height) )
1564     {
1565         i_old_pic_y =            p_buffer->i_pic_y;
1566         i_old_pic_height =       p_buffer->i_pic_height;
1567         p_buffer->i_pic_x =      i_pic_x;
1568         p_buffer->i_pic_y =      i_pic_y;
1569         p_buffer->i_pic_width =  i_pic_width;
1570         p_buffer->i_pic_height = i_pic_height;
1571         SetBufferArea( p_vout, 0, i_old_pic_y, p_vout->i_width, i_old_pic_height );
1572     }
1573     else
1574     {
1575         p_buffer->i_pic_x =      i_pic_x;
1576         p_buffer->i_pic_y =      i_pic_y;
1577         p_buffer->i_pic_width =  i_pic_width;
1578         p_buffer->i_pic_height = i_pic_height;
1579     }
1580
1581     /*
1582      * Clear areas
1583      */
1584     for( i_area = 0; i_area < p_buffer->i_areas; i_area++ )
1585     {
1586 #ifdef DEBUG_VIDEO
1587         intf_DbgMsg("clearing picture %p area in buffer %d: %d-%d\n", p_pic,
1588                     p_vout->i_buffer_index, p_buffer->pi_area_begin[i_area], p_buffer->pi_area_end[i_area] );
1589 #endif
1590         i_data_size = (p_buffer->pi_area_end[i_area] - p_buffer->pi_area_begin[i_area] + 1) * p_vout->i_bytes_per_line;
1591         p_data = (u64*) (p_buffer->p_data + p_vout->i_bytes_per_line * p_buffer->pi_area_begin[i_area]);
1592         for( i_data_index = i_data_size / 256; i_data_index-- ; )
1593         {
1594             /* Clear 256 bytes block */
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             *p_data++ = 0;  *p_data++ = 0;  *p_data++ = 0;  *p_data++ = 0;
1601             *p_data++ = 0;  *p_data++ = 0;  *p_data++ = 0;  *p_data++ = 0;
1602             *p_data++ = 0;  *p_data++ = 0;  *p_data++ = 0;  *p_data++ = 0;
1603         }
1604         for( i_data_index = (i_data_size % 256) / 16; i_data_index--; )
1605         {
1606             /* Clear remaining 16 bytes blocks */
1607             *p_data++ = 0;  *p_data++ = 0;
1608         }
1609         p_data8 = (byte_t *)p_data;
1610         for( i_data_index = i_data_size % 16; i_data_index--; )
1611         {
1612             /* Clear remaining bytes */
1613             *p_data8++ = 0;
1614         }
1615     }
1616
1617     /*
1618      * Clear areas array
1619      */
1620     p_buffer->i_areas = 0;
1621 }
1622
1623 /*****************************************************************************
1624  * RenderPicture: render a picture
1625  *****************************************************************************
1626  * This function convert a picture from a video heap to a pixel-encoded image
1627  * and copy it to the current rendering buffer. No lock is required, since the
1628  * rendered picture has been determined as existant, and will only be destroyed
1629  * by the vout thread later.
1630  *****************************************************************************/
1631 static void RenderPicture( vout_thread_t *p_vout, picture_t *p_pic )
1632 {
1633 #ifdef DEBUG_VIDEO
1634     char                psz_date[MSTRTIME_MAX_SIZE];         /* picture date */
1635     mtime_t             render_time;               /* picture rendering time */
1636 #endif
1637     vout_buffer_t *     p_buffer;                        /* rendering buffer */
1638     byte_t *            p_pic_data;                /* convertion destination */
1639
1640     /* Get and set rendering informations */
1641     p_buffer =          &p_vout->p_buffer[ p_vout->i_buffer_index ];
1642     p_pic_data =        p_buffer->p_data +
1643         p_buffer->i_pic_x * p_vout->i_bytes_per_pixel +
1644         p_buffer->i_pic_y * p_vout->i_bytes_per_line;
1645 #ifdef DEBUG_VIDEO
1646     render_time = mdate();
1647 #endif
1648
1649     /*
1650      * Choose appropriate rendering function and render picture
1651      */
1652     switch( p_pic->i_type )
1653     {
1654     case YUV_420_PICTURE:
1655         p_vout->yuv.p_Convert420( p_vout, p_pic_data,
1656                                   p_pic->p_y, p_pic->p_u, p_pic->p_v,
1657                                   p_pic->i_width, p_pic->i_height,
1658                                   p_buffer->i_pic_width, p_buffer->i_pic_height,
1659                                   p_vout->i_bytes_per_line / p_vout->i_bytes_per_pixel,
1660                                   p_pic->i_matrix_coefficients );
1661         break;
1662     case YUV_422_PICTURE:
1663         p_vout->yuv.p_Convert422( p_vout, p_pic_data,
1664                                   p_pic->p_y, p_pic->p_u, p_pic->p_v,
1665                                   p_pic->i_width, p_pic->i_height,
1666                                   p_buffer->i_pic_width, p_buffer->i_pic_height,
1667                                   p_vout->i_bytes_per_line / p_vout->i_bytes_per_pixel,
1668                                   p_pic->i_matrix_coefficients );
1669         break;
1670     case YUV_444_PICTURE:
1671         p_vout->yuv.p_Convert444( p_vout, p_pic_data,
1672                                   p_pic->p_y, p_pic->p_u, p_pic->p_v,
1673                                   p_pic->i_width, p_pic->i_height,
1674                                   p_buffer->i_pic_width, p_buffer->i_pic_height,
1675                                   p_vout->i_bytes_per_line / p_vout->i_bytes_per_pixel,
1676                                   p_pic->i_matrix_coefficients );
1677         break;
1678 #ifdef DEBUG
1679     default:
1680         intf_DbgMsg("error: unknown picture type %d\n", p_pic->i_type );
1681         break;
1682 #endif
1683     }
1684
1685 #ifdef DEBUG_VIDEO
1686     /* Print picture date and rendering time */
1687     intf_DbgMsg("picture %p rendered in buffer %d (%ld us), display date: %s\n", p_pic,
1688                 p_vout->i_buffer_index, (long) (mdate() - render_time),
1689                 mstrtime( psz_date, p_pic->date ));
1690 #endif
1691 }
1692
1693 /*****************************************************************************
1694  * RenderPictureInfo: print additionnal informations on a picture
1695  *****************************************************************************
1696  * This function will print informations such as fps and other picture
1697  * dependant informations.
1698  *****************************************************************************/
1699 static void RenderPictureInfo( vout_thread_t *p_vout, picture_t *p_pic )
1700 {
1701 #if defined(STATS) || defined(DEBUG)
1702     char        psz_buffer[256];                            /* string buffer */
1703 #endif
1704
1705 #ifdef STATS
1706     /*
1707      * Print FPS rate in upper right corner
1708      */
1709     if( p_vout->c_fps_samples > VOUT_FPS_SAMPLES )
1710     {
1711         sprintf( psz_buffer, "%.2f fps", (double) VOUT_FPS_SAMPLES * 1000000 /
1712                  ( p_vout->p_fps_sample[ (p_vout->c_fps_samples - 1) % VOUT_FPS_SAMPLES ] -
1713                    p_vout->p_fps_sample[ p_vout->c_fps_samples % VOUT_FPS_SAMPLES ] ) );
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   rendering: %ld us",
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  * RenderIdle: render idle 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 static int RenderIdle( 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     mtime_t     current_date;                                /* current date */
1763     const char *psz_text = "waiting for stream ...";      /* text to display */
1764
1765
1766     current_date = mdate();
1767     if( (current_date - p_vout->last_display_date) > VOUT_IDLE_DELAY &&
1768         (current_date - p_vout->last_idle_date) > VOUT_IDLE_DELAY )
1769     {
1770         SetBufferPicture( p_vout, NULL );
1771         vout_TextSize( p_vout->p_large_font, WIDE_TEXT | OUTLINED_TEXT, psz_text,
1772                        &i_width, &i_height );
1773         if( !Align( p_vout, &i_x, &i_y, i_width, i_height, CENTER_RALIGN, CENTER_RALIGN ) )
1774         {
1775             vout_Print( p_vout->p_large_font,
1776                         p_vout->p_buffer[ p_vout->i_buffer_index ].p_data +
1777                         i_x * p_vout->i_bytes_per_pixel + i_y * p_vout->i_bytes_per_line,
1778                         p_vout->i_bytes_per_pixel, p_vout->i_bytes_per_line,
1779                         p_vout->i_white_pixel, p_vout->i_gray_pixel, 0,
1780                         WIDE_TEXT | OUTLINED_TEXT, psz_text );
1781             SetBufferArea( p_vout, i_x, i_y, i_width, i_height );
1782         }
1783         return( 1 );
1784     }
1785     return( 0 );
1786 }
1787
1788 /*****************************************************************************
1789  * RenderInfo: render additionnal informations
1790  *****************************************************************************
1791  * This function render informations which do not depend of the current picture
1792  * rendered.
1793  *****************************************************************************/
1794 static void RenderInfo( vout_thread_t *p_vout )
1795 {
1796 #ifdef DEBUG
1797     char        psz_buffer[256];                            /* string buffer */
1798     int         i_ready_pic = 0;                           /* ready pictures */
1799     int         i_reserved_pic = 0;                     /* reserved pictures */
1800     int         i_picture;                                  /* picture index */
1801 #endif
1802
1803 #ifdef DEBUG
1804     /*
1805      * Print thread state in lower left corner
1806      */
1807     for( i_picture = 0; i_picture < VOUT_MAX_PICTURES; i_picture++ )
1808     {
1809         switch( p_vout->p_picture[i_picture].i_status )
1810         {
1811         case RESERVED_PICTURE:
1812         case RESERVED_DATED_PICTURE:
1813         case RESERVED_DISP_PICTURE:
1814             i_reserved_pic++;
1815             break;
1816         case READY_PICTURE:
1817             i_ready_pic++;
1818             break;
1819         }
1820     }
1821     sprintf( psz_buffer, "pic: %d (%d/%d)/%d",
1822              p_vout->i_pictures, i_reserved_pic, i_ready_pic, VOUT_MAX_PICTURES );
1823     Print( p_vout, 0, 0, LEFT_RALIGN, BOTTOM_RALIGN, psz_buffer );
1824 #endif
1825 }
1826
1827 /*****************************************************************************
1828  * RenderSubPicture: render a subpicture
1829  *****************************************************************************
1830  * This function render a sub picture unit.
1831  *****************************************************************************/
1832 static void RenderSubPicture( vout_thread_t *p_vout, subpicture_t *p_subpic )
1833 {
1834     p_vout_font_t       p_font;                                 /* text font */
1835     int                 i_width, i_height;          /* subpicture dimensions */
1836
1837     while( p_subpic != NULL )
1838     {
1839         switch( p_subpic->i_type )
1840         {
1841         case DVD_SUBPICTURE:                          /* DVD subpicture unit */
1842             /* test if the picture really has to be displayed */
1843             if( mdate() < p_subpic->begin_date )
1844             {
1845                 break;
1846             }
1847             if( mdate() > p_subpic->end_date )
1848             {
1849                 /* too late, destroying the subpic */
1850                 vout_DestroySubPicture( p_vout, p_subpic );
1851                 printf( "destroying subpicture\n" );
1852                 break;
1853             }
1854             vout_RenderSPU( p_subpic->p_data, p_subpic->type.spu.i_offset,
1855                             p_subpic->type.spu.i_x1, p_subpic->type.spu.i_y1,
1856                             p_vout->p_buffer[ p_vout->i_buffer_index ].p_data,
1857                             p_vout->i_bytes_per_pixel,
1858                             p_vout->i_bytes_per_line );
1859             break;
1860         case TEXT_SUBPICTURE:                            /* single line text */
1861             /* Select default font if not specified */
1862             p_font = p_subpic->type.text.p_font;
1863             if( p_font == NULL )
1864             {
1865                 p_font = p_vout->p_default_font;
1866             }
1867
1868             /* Compute text size (width and height fields are ignored)
1869              * and print it */
1870             vout_TextSize( p_font, p_subpic->type.text.i_style,
1871                            p_subpic->p_data, &i_width, &i_height );
1872             if( !Align( p_vout, &p_subpic->i_x, &p_subpic->i_y,
1873                         i_width, i_height, p_subpic->i_horizontal_align,
1874                         p_subpic->i_vertical_align ) )
1875             {
1876                 vout_Print( p_font,
1877                             p_vout->p_buffer[ p_vout->i_buffer_index ].p_data +
1878                             p_subpic->i_x * p_vout->i_bytes_per_pixel +
1879                             p_subpic->i_y * p_vout->i_bytes_per_line,
1880                             p_vout->i_bytes_per_pixel, p_vout->i_bytes_per_line,
1881                             p_subpic->type.text.i_char_color,
1882                             p_subpic->type.text.i_border_color,
1883                             p_subpic->type.text.i_bg_color,
1884                             p_subpic->type.text.i_style, p_subpic->p_data );
1885                 SetBufferArea( p_vout, p_subpic->i_x, p_subpic->i_y,
1886                                i_width, i_height );
1887             }
1888             break;
1889
1890 #ifdef DEBUG
1891         default:
1892             intf_DbgMsg( "error: unknown subpicture %p type %d\n",
1893                          p_subpic, p_subpic->i_type );
1894 #endif
1895         }
1896
1897         p_subpic = p_subpic->p_next;
1898     }
1899 }
1900
1901 /*****************************************************************************
1902  * RenderInterface: render the interface
1903  *****************************************************************************
1904  * This function render the interface, if any.
1905  *****************************************************************************/
1906 static void RenderInterface( vout_thread_t *p_vout )
1907 {
1908     int         i_height, i_text_height;            /* total and text height */
1909     int         i_width_1, i_width_2;                          /* text width */
1910     int         i_byte;                                        /* byte index */
1911     const char *psz_text_1 = "[1-9] Channel   [i]nfo   [c]olor     [g/G]amma";
1912     const char *psz_text_2 = "[+/-] Volume    [m]ute   [s]caling   [Q]uit";
1913
1914     /* Get text size */
1915     vout_TextSize( p_vout->p_large_font, OUTLINED_TEXT, psz_text_1, &i_width_1, &i_height );
1916     vout_TextSize( p_vout->p_large_font, OUTLINED_TEXT, psz_text_2, &i_width_2, &i_text_height );
1917     i_height += i_text_height;
1918
1919     /* Render background */
1920     for( i_byte = (p_vout->i_height - i_height) * p_vout->i_bytes_per_line;
1921          i_byte < p_vout->i_height * p_vout->i_bytes_per_line;
1922          i_byte++ )
1923     {
1924         /* XXX?? noooo ! */
1925         p_vout->p_buffer[ p_vout->i_buffer_index ].p_data[ i_byte ] = p_vout->i_blue_pixel;
1926     }
1927
1928     /* Render text, if not larger than screen */
1929     if( i_width_1 < p_vout->i_width )
1930     {
1931         vout_Print( p_vout->p_large_font, p_vout->p_buffer[ p_vout->i_buffer_index ].p_data +
1932                     (p_vout->i_height - i_height) * p_vout->i_bytes_per_line,
1933                     p_vout->i_bytes_per_pixel, p_vout->i_bytes_per_line,
1934                     p_vout->i_white_pixel, p_vout->i_black_pixel, 0,
1935                     OUTLINED_TEXT, psz_text_1 );
1936     }
1937     if( i_width_2 < p_vout->i_width )
1938     {
1939         vout_Print( p_vout->p_large_font, p_vout->p_buffer[ p_vout->i_buffer_index ].p_data +
1940                     (p_vout->i_height - i_height + i_text_height) * p_vout->i_bytes_per_line,
1941                     p_vout->i_bytes_per_pixel, p_vout->i_bytes_per_line,
1942                     p_vout->i_white_pixel, p_vout->i_black_pixel, 0,
1943                     OUTLINED_TEXT, psz_text_2 );
1944     }
1945
1946     /* Activate modified area */
1947     SetBufferArea( p_vout, 0, p_vout->i_height - i_height, p_vout->i_width, i_height );
1948 }
1949
1950 /*****************************************************************************
1951  * Synchronize: update synchro level depending of heap state
1952  *****************************************************************************
1953  * This function is called during the main vout loop.
1954  *****************************************************************************/
1955 static void Synchronize( vout_thread_t *p_vout, s64 i_delay )
1956 {
1957     int i_synchro_inc = 0;
1958     /* XXX?? gore following */
1959     static int i_panic_count = 0;
1960     static int i_last_synchro_inc = 0;
1961     static float r_synchro_level = VOUT_SYNCHRO_LEVEL_START;
1962     static int i_truc = 10;
1963
1964     if( i_delay < 0 )
1965     {
1966         //fprintf( stderr, "PANIC %d\n", i_panic_count );
1967         i_panic_count++;
1968     }
1969
1970     i_truc *= 2;
1971
1972     if( p_vout->i_pictures > VOUT_SYNCHRO_HEAP_IDEAL_SIZE+1 )
1973     {
1974         i_truc = 40;
1975         i_synchro_inc += p_vout->i_pictures - VOUT_SYNCHRO_HEAP_IDEAL_SIZE - 1;
1976
1977     }
1978     else
1979     {
1980         if( p_vout->i_pictures < VOUT_SYNCHRO_HEAP_IDEAL_SIZE )
1981         {
1982             i_truc = 32;
1983             i_synchro_inc += p_vout->i_pictures - VOUT_SYNCHRO_HEAP_IDEAL_SIZE;
1984         }
1985     }
1986
1987     if( i_truc > VOUT_SYNCHRO_LEVEL_MAX*2*2*2*2*2 ||
1988         i_synchro_inc*i_last_synchro_inc < 0 )
1989     {
1990         i_truc = 32;
1991     }
1992
1993     if( i_delay < 6000 )
1994     {
1995         i_truc = 16;
1996         i_synchro_inc -= 2;
1997     }
1998     else if( i_delay < 70000 )
1999     {
2000         i_truc = 24+(24*i_delay)/70000;
2001         if( i_truc < 16 )
2002             i_truc = 16;
2003         i_synchro_inc -= 1+(5*(70000-i_delay))/70000;
2004     }
2005     else if( i_delay > 100000 )
2006     {
2007         r_synchro_level += 1;
2008         if( i_delay > 130000 )
2009             r_synchro_level += 1;
2010     }
2011
2012     r_synchro_level += (float)i_synchro_inc / i_truc;
2013     p_vout->i_synchro_level = (int)(r_synchro_level+0.5);
2014
2015     if( r_synchro_level > VOUT_SYNCHRO_LEVEL_MAX )
2016     {
2017         r_synchro_level = VOUT_SYNCHRO_LEVEL_MAX;
2018     }
2019
2020     //fprintf( stderr, "synchro level : %d, heap : %d (%d, %d) (%d, %f) - %Ld\n", p_vout->i_synchro_level,
2021     //        p_vout->i_pictures, i_last_synchro_inc, i_synchro_inc, i_truc, r_synchro_level, i_delay );
2022     i_last_synchro_inc = i_synchro_inc;
2023 }
2024
2025 /*****************************************************************************
2026  * Manage: manage thread
2027  *****************************************************************************
2028  * This function will handle changes in thread configuration.
2029  *****************************************************************************/
2030 static int Manage( vout_thread_t *p_vout )
2031 {
2032 #ifdef DEBUG_VIDEO
2033     if( p_vout->i_changes )
2034     {
2035         intf_DbgMsg("changes: 0x%x (no display: 0x%x)\n", p_vout->i_changes,
2036                     p_vout->i_changes & VOUT_NODISPLAY_CHANGE );
2037     }
2038 #endif
2039
2040     /* On gamma or grayscale change, rebuild tables */
2041     if( p_vout->i_changes & (VOUT_GAMMA_CHANGE | VOUT_GRAYSCALE_CHANGE |
2042                              VOUT_YUV_CHANGE) )
2043     {
2044         if( vout_ResetYUV( p_vout ) )
2045         {
2046             intf_ErrMsg("error: can't rebuild convertion tables\n");
2047             return( 1 );
2048         }
2049     }
2050
2051     /* Clear changes flags which does not need management or have been
2052      * handled */
2053     p_vout->i_changes &= ~(VOUT_GAMMA_CHANGE | VOUT_GRAYSCALE_CHANGE |
2054                            VOUT_YUV_CHANGE   | VOUT_INFO_CHANGE |
2055                            VOUT_INTF_CHANGE  | VOUT_SCALE_CHANGE );
2056
2057     /* Detect unauthorized changes */
2058     if( p_vout->i_changes )
2059     {
2060         /* Some changes were not acknowledged by p_vout->p_sys_manage or this
2061          * function, it means they should not be authorized */
2062         intf_ErrMsg( "error: unauthorized changes in the video output thread\n" );
2063         return( 1 );
2064     }
2065
2066     return( 0 );
2067 }
2068
2069 /*****************************************************************************
2070  * Align: align a subpicture in the screen
2071  *****************************************************************************
2072  * This function is used for rendering text or subpictures. It returns non 0
2073  * it the final aera is not fully included in display area. Return coordinates
2074  * are absolute.
2075  *****************************************************************************/
2076 static int Align( vout_thread_t *p_vout, int *pi_x, int *pi_y,
2077                    int i_width, int i_height, int i_h_align, int i_v_align )
2078 {
2079     /* Align horizontally */
2080     switch( i_h_align )
2081     {
2082     case CENTER_ALIGN:
2083         *pi_x -= i_width / 2;
2084         break;
2085     case CENTER_RALIGN:
2086         *pi_x += (p_vout->i_width - i_width) / 2;
2087         break;
2088     case RIGHT_ALIGN:
2089         *pi_x -= i_width;
2090         break;
2091     case RIGHT_RALIGN:
2092         *pi_x += p_vout->i_width - i_width;
2093         break;
2094     }
2095
2096     /* Align vertically */
2097     switch( i_v_align )
2098     {
2099     case CENTER_ALIGN:
2100         *pi_y -= i_height / 2;
2101         break;
2102     case CENTER_RALIGN:
2103         *pi_y += (p_vout->i_height - i_height) / 2;
2104         break;
2105     case BOTTOM_ALIGN:
2106         *pi_y -= i_height;
2107         break;
2108     case BOTTOM_RALIGN:
2109         *pi_y += p_vout->i_height - i_height;
2110         break;
2111     case SUBTITLE_RALIGN:
2112         *pi_y += (p_vout->i_height + p_vout->p_buffer[ p_vout->i_buffer_index ].i_pic_y +
2113                   p_vout->p_buffer[ p_vout->i_buffer_index ].i_pic_height - i_height) / 2;
2114         break;
2115     }
2116
2117     /* Return non 0 if clipping failed */
2118     return( (*pi_x < 0) || (*pi_y < 0) ||
2119             (*pi_x + i_width > p_vout->i_width) || (*pi_y + i_height > p_vout->i_height) );
2120 }
2121
2122 /*****************************************************************************
2123  * SetPalette: sets an 8 bpp palette
2124  *****************************************************************************
2125  * This function is just a prototype that does nothing. Architectures that
2126  * support palette allocation should override it.
2127  *****************************************************************************/
2128 static void     SetPalette        ( p_vout_thread_t p_vout, u16 *red,
2129                                     u16 *green, u16 *blue, u16 *transp )
2130 {
2131     intf_ErrMsg( "SetPalette: method does not support palette changing\n" );
2132 }
2133