git.sesse.net Git - vlc/blob - modules/video_filter/wall.c

   1 /*****************************************************************************
   2  * wall.c : Wall video plugin for vlc
   3  *****************************************************************************
   4  * Copyright (C) 2000, 2001, 2002, 2003 VideoLAN
   5  * $Id$
   6  *
   7  * Authors: Samuel Hocevar <sam@zoy.org>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
  22  *****************************************************************************/
  23
  24 /*****************************************************************************
  25  * Preamble
  26  *****************************************************************************/
  27 #include <stdlib.h>                                      /* malloc(), free() */
  28 #include <string.h>
  29
  30 #include <vlc/vlc.h>
  31 #include <vlc/vout.h>
  32
  33 #include "filter_common.h"
  34
  35 /*****************************************************************************
  36  * Local prototypes
  37  *****************************************************************************/
  38 static int  Create    ( vlc_object_t * );
  39 static void Destroy   ( vlc_object_t * );
  40
  41 static int  Init      ( vout_thread_t * );
  42 static void End       ( vout_thread_t * );
  43 static void Render    ( vout_thread_t *, picture_t * );
  44
  45 static void RemoveAllVout  ( vout_thread_t *p_vout );
  46
  47 static int  SendEvents( vlc_object_t *, char const *,
  48                         vlc_value_t, vlc_value_t, void * );
  49
  50 /*****************************************************************************
  51  * Module descriptor
  52  *****************************************************************************/
  53 #define COLS_TEXT N_("Number of columns")
  54 #define COLS_LONGTEXT N_("Select the number of horizontal video windows in " \
  55     "which to split the video.")
  56
  57 #define ROWS_TEXT N_("Number of rows")
  58 #define ROWS_LONGTEXT N_("Select the number of vertical video windows in " \
  59     "which to split the video.")
  60
  61 #define ACTIVE_TEXT N_("Active windows")
  62 #define ACTIVE_LONGTEXT N_("Comma separated list of active windows, " \
  63     "defaults to all")
  64
  65 vlc_module_begin();
  66     set_description( _("wall video filter") );
  67     set_capability( "video filter", 0 );
  68
  69     add_integer( "wall-cols", 3, NULL, COLS_TEXT, COLS_LONGTEXT, VLC_FALSE );
  70     add_integer( "wall-rows", 3, NULL, ROWS_TEXT, ROWS_LONGTEXT, VLC_FALSE );
  71     add_string( "wall-active", NULL, NULL, ACTIVE_TEXT, ACTIVE_LONGTEXT, VLC_FALSE );
  72
  73     add_shortcut( "wall" );
  74     set_callbacks( Create, Destroy );
  75 vlc_module_end();
  76
  77 /*****************************************************************************
  78  * vout_sys_t: Wall video output method descriptor
  79  *****************************************************************************
  80  * This structure is part of the video output thread descriptor.
  81  * It describes the Wall specific properties of an output thread.
  82  *****************************************************************************/
  83 struct vout_sys_t
  84 {
  85     int    i_col;
  86     int    i_row;
  87     int    i_vout;
  88     struct vout_list_t
  89     {
  90         vlc_bool_t b_active;
  91         int i_width;
  92         int i_height;
  93         vout_thread_t *p_vout;
  94     } *pp_vout;
  95 };
  96
  97 /*****************************************************************************
  98  * Control: control facility for the vout (forwards to child vout)
  99  *****************************************************************************/
 100 static int Control( vout_thread_t *p_vout, int i_query, va_list args )
 101 {
 102     int i_row, i_col, i_vout = 0;
 103
 104     for( i_row = 0; i_row < p_vout->p_sys->i_row; i_row++ )
 105     {
 106         for( i_col = 0; i_col < p_vout->p_sys->i_col; i_col++ )
 107         {
 108             vout_vaControl( p_vout->p_sys->pp_vout[ i_vout ].p_vout,
 109                             i_query, args );
 110             i_vout++;
 111         }
 112     }
 113     return VLC_SUCCESS;
 114 }
 115
 116 /*****************************************************************************
 117  * Create: allocates Wall video thread output method
 118  *****************************************************************************
 119  * This function allocates and initializes a Wall vout method.
 120  *****************************************************************************/
 121 static int Create( vlc_object_t *p_this )
 122 {
 123     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 124     char *psz_method, *psz_tmp, *psz_method_tmp;
 125     int i_vout;
 126
 127     /* Allocate structure */
 128     p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
 129     if( p_vout->p_sys == NULL )
 130     {
 131         msg_Err( p_vout, "out of memory" );
 132         return VLC_ENOMEM;
 133     }
 134
 135     p_vout->pf_init = Init;
 136     p_vout->pf_end = End;
 137     p_vout->pf_manage = NULL;
 138     p_vout->pf_render = Render;
 139     p_vout->pf_display = NULL;
 140     p_vout->pf_control = Control;
 141
 142     /* Look what method was requested */
 143     p_vout->p_sys->i_col = config_GetInt( p_vout, "wall-cols" );
 144     p_vout->p_sys->i_row = config_GetInt( p_vout, "wall-rows" );
 145
 146     p_vout->p_sys->i_col = __MAX( 1, __MIN( 15, p_vout->p_sys->i_col ) );
 147     p_vout->p_sys->i_row = __MAX( 1, __MIN( 15, p_vout->p_sys->i_row ) );
 148
 149     msg_Dbg( p_vout, "opening a %i x %i wall",
 150              p_vout->p_sys->i_col, p_vout->p_sys->i_row );
 151
 152     p_vout->p_sys->pp_vout = malloc( p_vout->p_sys->i_row *
 153                                      p_vout->p_sys->i_col *
 154                                      sizeof(struct vout_list_t) );
 155     if( p_vout->p_sys->pp_vout == NULL )
 156     {
 157         msg_Err( p_vout, "out of memory" );
 158         free( p_vout->p_sys );
 159         return VLC_ENOMEM;
 160     }
 161
 162     psz_method_tmp = psz_method = config_GetPsz( p_vout, "wall-active" );
 163
 164     /* If no trailing vout are specified, take them all */
 165     if( psz_method == NULL )
 166     {
 167         for( i_vout = p_vout->p_sys->i_row * p_vout->p_sys->i_col;
 168              i_vout--; )
 169         {
 170             p_vout->p_sys->pp_vout[i_vout].b_active = 1;
 171         }
 172     }
 173     /* If trailing vout are specified, activate only the requested ones */
 174     else
 175     {
 176         for( i_vout = p_vout->p_sys->i_row * p_vout->p_sys->i_col;
 177              i_vout--; )
 178         {
 179             p_vout->p_sys->pp_vout[i_vout].b_active = 0;
 180         }
 181
 182         while( *psz_method )
 183         {
 184             psz_tmp = psz_method;
 185             while( *psz_tmp && *psz_tmp != ',' )
 186             {
 187                 psz_tmp++;
 188             }
 189
 190             if( *psz_tmp )
 191             {
 192                 *psz_tmp = '\0';
 193                 i_vout = atoi( psz_method );
 194                 psz_method = psz_tmp + 1;
 195             }
 196             else
 197             {
 198                 i_vout = atoi( psz_method );
 199                 psz_method = psz_tmp;
 200             }
 201
 202             if( i_vout >= 0 &&
 203                 i_vout < p_vout->p_sys->i_row * p_vout->p_sys->i_col )
 204             {
 205                 p_vout->p_sys->pp_vout[i_vout].b_active = 1;
 206             }
 207         }
 208     }
 209
 210     free( psz_method_tmp );
 211
 212     return VLC_SUCCESS;
 213 }
 214
 215 /*****************************************************************************
 216  * Init: initialize Wall video thread output method
 217  *****************************************************************************/
 218 static int Init( vout_thread_t *p_vout )
 219 {
 220     int i_index, i_row, i_col, i_width, i_height;
 221     picture_t *p_pic;
 222
 223     I_OUTPUTPICTURES = 0;
 224
 225     /* Initialize the output structure */
 226     p_vout->output.i_chroma = p_vout->render.i_chroma;
 227     p_vout->output.i_width  = p_vout->render.i_width;
 228     p_vout->output.i_height = p_vout->render.i_height;
 229     p_vout->output.i_aspect = p_vout->render.i_aspect;
 230
 231     /* Try to open the real video output */
 232     msg_Dbg( p_vout, "spawning the real video outputs" );
 233
 234     p_vout->p_sys->i_vout = 0;
 235
 236     /* FIXME: use bresenham instead of those ugly divisions */
 237     for( i_row = 0; i_row < p_vout->p_sys->i_row; i_row++ )
 238     {
 239         for( i_col = 0; i_col < p_vout->p_sys->i_col; i_col++ )
 240         {
 241             if( i_col + 1 < p_vout->p_sys->i_col )
 242             {
 243                 i_width = ( p_vout->render.i_width
 244                              / p_vout->p_sys->i_col ) & ~0x1;
 245             }
 246             else
 247             {
 248                 i_width = p_vout->render.i_width
 249                            - ( ( p_vout->render.i_width
 250                                   / p_vout->p_sys->i_col ) & ~0x1 ) * i_col;
 251             }
 252
 253             if( i_row + 1 < p_vout->p_sys->i_row )
 254             {
 255                 i_height = ( p_vout->render.i_height
 256                               / p_vout->p_sys->i_row ) & ~0x3;
 257             }
 258             else
 259             {
 260                 i_height = p_vout->render.i_height
 261                             - ( ( p_vout->render.i_height
 262                                    / p_vout->p_sys->i_row ) & ~0x3 ) * i_row;
 263             }
 264
 265             p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].i_width = i_width;
 266             p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].i_height = i_height;
 267
 268             if( !p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].b_active )
 269             {
 270                 p_vout->p_sys->i_vout++;
 271                 continue;
 272             }
 273
 274             p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].p_vout =
 275                 vout_Create( p_vout, i_width, i_height,
 276                              p_vout->render.i_chroma,
 277                              p_vout->render.i_aspect
 278                               * p_vout->render.i_height / i_height
 279                               * i_width / p_vout->render.i_width );
 280             if( p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].p_vout == NULL )
 281             {
 282                 msg_Err( p_vout, "failed to get %ix%i vout threads",
 283                                  p_vout->p_sys->i_col, p_vout->p_sys->i_row );
 284                 RemoveAllVout( p_vout );
 285                 return VLC_EGENERIC;
 286             }
 287             ADD_CALLBACKS(
 288                 p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].p_vout,
 289                 SendEvents );
 290
 291             p_vout->p_sys->i_vout++;
 292         }
 293     }
 294
 295     ALLOCATE_DIRECTBUFFERS( VOUT_MAX_PICTURES );
 296
 297     ADD_PARENT_CALLBACKS( SendEventsToChild );
 298
 299     return VLC_SUCCESS;
 300 }
 301
 302 /*****************************************************************************
 303  * End: terminate Wall video thread output method
 304  *****************************************************************************/
 305 static void End( vout_thread_t *p_vout )
 306 {
 307     int i_index;
 308
 309     /* Free the fake output buffers we allocated */
 310     for( i_index = I_OUTPUTPICTURES ; i_index ; )
 311     {
 312         i_index--;
 313         free( PP_OUTPUTPICTURE[ i_index ]->p_data_orig );
 314     }
 315 }
 316
 317 /*****************************************************************************
 318  * Destroy: destroy Wall video thread output method
 319  *****************************************************************************
 320  * Terminate an output method created by WallCreateOutputMethod
 321  *****************************************************************************/
 322 static void Destroy( vlc_object_t *p_this )
 323 {
 324     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 325
 326     RemoveAllVout( p_vout );
 327
 328     DEL_PARENT_CALLBACKS( SendEventsToChild );
 329
 330     free( p_vout->p_sys->pp_vout );
 331     free( p_vout->p_sys );
 332 }
 333
 334 /*****************************************************************************
 335  * Render: displays previously rendered output
 336  *****************************************************************************
 337  * This function send the currently rendered image to Wall image, waits
 338  * until it is displayed and switch the two rendering buffers, preparing next
 339  * frame.
 340  *****************************************************************************/
 341 static void Render( vout_thread_t *p_vout, picture_t *p_pic )
 342 {
 343     picture_t *p_outpic = NULL;
 344     int i_col, i_row, i_vout, i_plane;
 345     int pi_left_skip[VOUT_MAX_PLANES], pi_top_skip[VOUT_MAX_PLANES];
 346
 347     i_vout = 0;
 348
 349     for( i_plane = 0 ; i_plane < p_pic->i_planes ; i_plane++ )
 350     {
 351         pi_top_skip[i_plane] = 0;
 352     }
 353
 354     for( i_row = 0; i_row < p_vout->p_sys->i_row; i_row++ )
 355     {
 356         for( i_plane = 0 ; i_plane < p_pic->i_planes ; i_plane++ )
 357         {
 358             pi_left_skip[i_plane] = 0;
 359         }
 360
 361         for( i_col = 0; i_col < p_vout->p_sys->i_col; i_col++ )
 362         {
 363             if( !p_vout->p_sys->pp_vout[ i_vout ].b_active )
 364             {
 365                 for( i_plane = 0 ; i_plane < p_pic->i_planes ; i_plane++ )
 366                 {
 367                     pi_left_skip[i_plane] +=
 368                         p_vout->p_sys->pp_vout[ i_vout ].i_width
 369                          * p_pic->p[i_plane].i_pitch / p_vout->output.i_width;
 370                 }
 371                 i_vout++;
 372                 continue;
 373             }
 374
 375             while( ( p_outpic =
 376                 vout_CreatePicture( p_vout->p_sys->pp_vout[ i_vout ].p_vout,
 377                                     0, 0, 0 )
 378                    ) == NULL )
 379             {
 380                 if( p_vout->b_die || p_vout->b_error )
 381                 {
 382                     vout_DestroyPicture(
 383                         p_vout->p_sys->pp_vout[ i_vout ].p_vout, p_outpic );
 384                     return;
 385                 }
 386
 387                 msleep( VOUT_OUTMEM_SLEEP );
 388             }
 389
 390             vout_DatePicture( p_vout->p_sys->pp_vout[ i_vout ].p_vout,
 391                               p_outpic, p_pic->date );
 392             vout_LinkPicture( p_vout->p_sys->pp_vout[ i_vout ].p_vout,
 393                               p_outpic );
 394
 395             for( i_plane = 0 ; i_plane < p_pic->i_planes ; i_plane++ )
 396             {
 397                 uint8_t *p_in, *p_in_end, *p_out;
 398                 int i_in_pitch = p_pic->p[i_plane].i_pitch;
 399                 int i_out_pitch = p_outpic->p[i_plane].i_pitch;
 400                 int i_copy_pitch = p_outpic->p[i_plane].i_visible_pitch;
 401
 402                 p_in = p_pic->p[i_plane].p_pixels
 403                         + pi_top_skip[i_plane] + pi_left_skip[i_plane];
 404
 405                 p_in_end = p_in + p_outpic->p[i_plane].i_visible_lines
 406                                    * p_pic->p[i_plane].i_pitch;
 407
 408                 p_out = p_outpic->p[i_plane].p_pixels;
 409
 410                 while( p_in < p_in_end )
 411                 {
 412                     p_vout->p_vlc->pf_memcpy( p_out, p_in, i_copy_pitch );
 413                     p_in += i_in_pitch;
 414                     p_out += i_out_pitch;
 415                 }
 416
 417                 pi_left_skip[i_plane] += i_out_pitch;
 418             }
 419
 420             vout_UnlinkPicture( p_vout->p_sys->pp_vout[ i_vout ].p_vout,
 421                                 p_outpic );
 422             vout_DisplayPicture( p_vout->p_sys->pp_vout[ i_vout ].p_vout,
 423                                  p_outpic );
 424
 425             i_vout++;
 426         }
 427
 428         for( i_plane = 0 ; i_plane < p_pic->i_planes ; i_plane++ )
 429         {
 430             pi_top_skip[i_plane] += p_vout->p_sys->pp_vout[ i_vout ].i_height
 431                                      * p_pic->p[i_plane].i_visible_lines
 432                                      / p_vout->output.i_height
 433                                      * p_pic->p[i_plane].i_pitch;
 434         }
 435     }
 436 }
 437
 438 /*****************************************************************************
 439  * RemoveAllVout: destroy all the child video output threads
 440  *****************************************************************************/
 441 static void RemoveAllVout( vout_thread_t *p_vout )
 442 {
 443     while( p_vout->p_sys->i_vout )
 444     {
 445          --p_vout->p_sys->i_vout;
 446          if( p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].b_active )
 447          {
 448              DEL_CALLBACKS(
 449                  p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].p_vout,
 450                  SendEvents );
 451              vlc_object_detach(
 452                  p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].p_vout );
 453              vout_Destroy(
 454                  p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].p_vout );
 455          }
 456     }
 457 }
 458
 459 /*****************************************************************************
 460  * SendEvents: forward mouse and keyboard events to the parent p_vout
 461  *****************************************************************************/
 462 static int SendEvents( vlc_object_t *p_this, char const *psz_var,
 463                        vlc_value_t oldval, vlc_value_t newval, void *_p_vout )
 464 {
 465     vout_thread_t *p_vout = (vout_thread_t *)_p_vout;
 466     int i_vout;
 467     vlc_value_t sentval = newval;
 468
 469     /* Find the video output index */
 470     for( i_vout = 0; i_vout < p_vout->p_sys->i_vout; i_vout++ )
 471     {
 472         if( p_this == (vlc_object_t *)p_vout->p_sys->pp_vout[ i_vout ].p_vout )
 473         {
 474             break;
 475         }
 476     }
 477
 478     if( i_vout == p_vout->p_sys->i_vout )
 479     {
 480         return VLC_EGENERIC;
 481     }
 482
 483     /* Translate the mouse coordinates */
 484     if( !strcmp( psz_var, "mouse-x" ) )
 485     {
 486         sentval.i_int += p_vout->output.i_width
 487                           * (i_vout % p_vout->p_sys->i_col)
 488                           / p_vout->p_sys->i_col;
 489     }
 490     else if( !strcmp( psz_var, "mouse-y" ) )
 491     {
 492         sentval.i_int += p_vout->output.i_height
 493                           * (i_vout / p_vout->p_sys->i_row)
 494                           / p_vout->p_sys->i_row;
 495     }
 496
 497     var_Set( p_vout, psz_var, sentval );
 498
 499     return VLC_SUCCESS;
 500 }
 501
 502 /*****************************************************************************
 503  * SendEventsToChild: forward events to the child/children vout
 504  *****************************************************************************/
 505 static int SendEventsToChild( vlc_object_t *p_this, char const *psz_var,
 506                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
 507 {
 508     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 509     int i_row, i_col, i_vout = 0;
 510
 511     for( i_row = 0; i_row < p_vout->p_sys->i_row; i_row++ )
 512     {
 513         for( i_col = 0; i_col < p_vout->p_sys->i_col; i_col++ )
 514         {
 515             var_Set( p_vout->p_sys->pp_vout[ i_vout ].p_vout, psz_var, newval);
 516             if( !strcmp( psz_var, "fullscreen" ) ) break;
 517             i_vout++;
 518         }
 519     }
 520
 521     return VLC_SUCCESS;
 522 }