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     set_category( CAT_VIDEO );
  69     set_subcategory( SUBCAT_VIDEO_VFILTER );
  70
  71     add_integer( "wall-cols", 3, NULL, COLS_TEXT, COLS_LONGTEXT, VLC_FALSE );
  72     add_integer( "wall-rows", 3, NULL, ROWS_TEXT, ROWS_LONGTEXT, VLC_FALSE );
  73     add_string( "wall-active", NULL, NULL, ACTIVE_TEXT, ACTIVE_LONGTEXT, VLC_FALSE );
  74
  75     add_shortcut( "wall" );
  76     set_callbacks( Create, Destroy );
  77 vlc_module_end();
  78
  79 /*****************************************************************************
  80  * vout_sys_t: Wall video output method descriptor
  81  *****************************************************************************
  82  * This structure is part of the video output thread descriptor.
  83  * It describes the Wall specific properties of an output thread.
  84  *****************************************************************************/
  85 struct vout_sys_t
  86 {
  87     int    i_col;
  88     int    i_row;
  89     int    i_vout;
  90     struct vout_list_t
  91     {
  92         vlc_bool_t b_active;
  93         int i_width;
  94         int i_height;
  95         vout_thread_t *p_vout;
  96     } *pp_vout;
  97 };
  98
  99 /*****************************************************************************
 100  * Control: control facility for the vout (forwards to child vout)
 101  *****************************************************************************/
 102 static int Control( vout_thread_t *p_vout, int i_query, va_list args )
 103 {
 104     int i_row, i_col, i_vout = 0;
 105
 106     for( i_row = 0; i_row < p_vout->p_sys->i_row; i_row++ )
 107     {
 108         for( i_col = 0; i_col < p_vout->p_sys->i_col; i_col++ )
 109         {
 110             vout_vaControl( p_vout->p_sys->pp_vout[ i_vout ].p_vout,
 111                             i_query, args );
 112             i_vout++;
 113         }
 114     }
 115     return VLC_SUCCESS;
 116 }
 117
 118 /*****************************************************************************
 119  * Create: allocates Wall video thread output method
 120  *****************************************************************************
 121  * This function allocates and initializes a Wall vout method.
 122  *****************************************************************************/
 123 static int Create( vlc_object_t *p_this )
 124 {
 125     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 126     char *psz_method, *psz_tmp, *psz_method_tmp;
 127     int i_vout;
 128
 129     /* Allocate structure */
 130     p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
 131     if( p_vout->p_sys == NULL )
 132     {
 133         msg_Err( p_vout, "out of memory" );
 134         return VLC_ENOMEM;
 135     }
 136
 137     p_vout->pf_init = Init;
 138     p_vout->pf_end = End;
 139     p_vout->pf_manage = NULL;
 140     p_vout->pf_render = Render;
 141     p_vout->pf_display = NULL;
 142     p_vout->pf_control = Control;
 143
 144     /* Look what method was requested */
 145     p_vout->p_sys->i_col = config_GetInt( p_vout, "wall-cols" );
 146     p_vout->p_sys->i_row = config_GetInt( p_vout, "wall-rows" );
 147
 148     p_vout->p_sys->i_col = __MAX( 1, __MIN( 15, p_vout->p_sys->i_col ) );
 149     p_vout->p_sys->i_row = __MAX( 1, __MIN( 15, p_vout->p_sys->i_row ) );
 150
 151     msg_Dbg( p_vout, "opening a %i x %i wall",
 152              p_vout->p_sys->i_col, p_vout->p_sys->i_row );
 153
 154     p_vout->p_sys->pp_vout = malloc( p_vout->p_sys->i_row *
 155                                      p_vout->p_sys->i_col *
 156                                      sizeof(struct vout_list_t) );
 157     if( p_vout->p_sys->pp_vout == NULL )
 158     {
 159         msg_Err( p_vout, "out of memory" );
 160         free( p_vout->p_sys );
 161         return VLC_ENOMEM;
 162     }
 163
 164     psz_method_tmp = psz_method = config_GetPsz( p_vout, "wall-active" );
 165
 166     /* If no trailing vout are specified, take them all */
 167     if( psz_method == NULL )
 168     {
 169         for( i_vout = p_vout->p_sys->i_row * p_vout->p_sys->i_col;
 170              i_vout--; )
 171         {
 172             p_vout->p_sys->pp_vout[i_vout].b_active = 1;
 173         }
 174     }
 175     /* If trailing vout are specified, activate only the requested ones */
 176     else
 177     {
 178         for( i_vout = p_vout->p_sys->i_row * p_vout->p_sys->i_col;
 179              i_vout--; )
 180         {
 181             p_vout->p_sys->pp_vout[i_vout].b_active = 0;
 182         }
 183
 184         while( *psz_method )
 185         {
 186             psz_tmp = psz_method;
 187             while( *psz_tmp && *psz_tmp != ',' )
 188             {
 189                 psz_tmp++;
 190             }
 191
 192             if( *psz_tmp )
 193             {
 194                 *psz_tmp = '\0';
 195                 i_vout = atoi( psz_method );
 196                 psz_method = psz_tmp + 1;
 197             }
 198             else
 199             {
 200                 i_vout = atoi( psz_method );
 201                 psz_method = psz_tmp;
 202             }
 203
 204             if( i_vout >= 0 &&
 205                 i_vout < p_vout->p_sys->i_row * p_vout->p_sys->i_col )
 206             {
 207                 p_vout->p_sys->pp_vout[i_vout].b_active = 1;
 208             }
 209         }
 210     }
 211
 212     free( psz_method_tmp );
 213
 214     return VLC_SUCCESS;
 215 }
 216
 217 /*****************************************************************************
 218  * Init: initialize Wall video thread output method
 219  *****************************************************************************/
 220 static int Init( vout_thread_t *p_vout )
 221 {
 222     int i_index, i_row, i_col, i_width, i_height;
 223     picture_t *p_pic;
 224
 225     I_OUTPUTPICTURES = 0;
 226
 227     /* Initialize the output structure */
 228     p_vout->output.i_chroma = p_vout->render.i_chroma;
 229     p_vout->output.i_width  = p_vout->render.i_width;
 230     p_vout->output.i_height = p_vout->render.i_height;
 231     p_vout->output.i_aspect = p_vout->render.i_aspect;
 232
 233     /* Try to open the real video output */
 234     msg_Dbg( p_vout, "spawning the real video outputs" );
 235
 236     p_vout->p_sys->i_vout = 0;
 237
 238     /* FIXME: use bresenham instead of those ugly divisions */
 239     for( i_row = 0; i_row < p_vout->p_sys->i_row; i_row++ )
 240     {
 241         for( i_col = 0; i_col < p_vout->p_sys->i_col; i_col++ )
 242         {
 243             if( i_col + 1 < p_vout->p_sys->i_col )
 244             {
 245                 i_width = ( p_vout->render.i_width
 246                              / p_vout->p_sys->i_col ) & ~0x1;
 247             }
 248             else
 249             {
 250                 i_width = p_vout->render.i_width
 251                            - ( ( p_vout->render.i_width
 252                                   / p_vout->p_sys->i_col ) & ~0x1 ) * i_col;
 253             }
 254
 255             if( i_row + 1 < p_vout->p_sys->i_row )
 256             {
 257                 i_height = ( p_vout->render.i_height
 258                               / p_vout->p_sys->i_row ) & ~0x3;
 259             }
 260             else
 261             {
 262                 i_height = p_vout->render.i_height
 263                             - ( ( p_vout->render.i_height
 264                                    / p_vout->p_sys->i_row ) & ~0x3 ) * i_row;
 265             }
 266
 267             p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].i_width = i_width;
 268             p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].i_height = i_height;
 269
 270             if( !p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].b_active )
 271             {
 272                 p_vout->p_sys->i_vout++;
 273                 continue;
 274             }
 275
 276             p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].p_vout =
 277                 vout_Create( p_vout, i_width, i_height,
 278                              p_vout->render.i_chroma,
 279                              p_vout->render.i_aspect
 280                               * p_vout->render.i_height / i_height
 281                               * i_width / p_vout->render.i_width );
 282             if( p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].p_vout == NULL )
 283             {
 284                 msg_Err( p_vout, "failed to get %ix%i vout threads",
 285                                  p_vout->p_sys->i_col, p_vout->p_sys->i_row );
 286                 RemoveAllVout( p_vout );
 287                 return VLC_EGENERIC;
 288             }
 289             ADD_CALLBACKS(
 290                 p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].p_vout,
 291                 SendEvents );
 292
 293             p_vout->p_sys->i_vout++;
 294         }
 295     }
 296
 297     ALLOCATE_DIRECTBUFFERS( VOUT_MAX_PICTURES );
 298
 299     ADD_PARENT_CALLBACKS( SendEventsToChild );
 300
 301     return VLC_SUCCESS;
 302 }
 303
 304 /*****************************************************************************
 305  * End: terminate Wall video thread output method
 306  *****************************************************************************/
 307 static void End( vout_thread_t *p_vout )
 308 {
 309     int i_index;
 310
 311     /* Free the fake output buffers we allocated */
 312     for( i_index = I_OUTPUTPICTURES ; i_index ; )
 313     {
 314         i_index--;
 315         free( PP_OUTPUTPICTURE[ i_index ]->p_data_orig );
 316     }
 317 }
 318
 319 /*****************************************************************************
 320  * Destroy: destroy Wall video thread output method
 321  *****************************************************************************
 322  * Terminate an output method created by WallCreateOutputMethod
 323  *****************************************************************************/
 324 static void Destroy( vlc_object_t *p_this )
 325 {
 326     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 327
 328     RemoveAllVout( p_vout );
 329
 330     DEL_PARENT_CALLBACKS( SendEventsToChild );
 331
 332     free( p_vout->p_sys->pp_vout );
 333     free( p_vout->p_sys );
 334 }
 335
 336 /*****************************************************************************
 337  * Render: displays previously rendered output
 338  *****************************************************************************
 339  * This function send the currently rendered image to Wall image, waits
 340  * until it is displayed and switch the two rendering buffers, preparing next
 341  * frame.
 342  *****************************************************************************/
 343 static void Render( vout_thread_t *p_vout, picture_t *p_pic )
 344 {
 345     picture_t *p_outpic = NULL;
 346     int i_col, i_row, i_vout, i_plane;
 347     int pi_left_skip[VOUT_MAX_PLANES], pi_top_skip[VOUT_MAX_PLANES];
 348
 349     i_vout = 0;
 350
 351     for( i_plane = 0 ; i_plane < p_pic->i_planes ; i_plane++ )
 352     {
 353         pi_top_skip[i_plane] = 0;
 354     }
 355
 356     for( i_row = 0; i_row < p_vout->p_sys->i_row; i_row++ )
 357     {
 358         for( i_plane = 0 ; i_plane < p_pic->i_planes ; i_plane++ )
 359         {
 360             pi_left_skip[i_plane] = 0;
 361         }
 362
 363         for( i_col = 0; i_col < p_vout->p_sys->i_col; i_col++ )
 364         {
 365             if( !p_vout->p_sys->pp_vout[ i_vout ].b_active )
 366             {
 367                 for( i_plane = 0 ; i_plane < p_pic->i_planes ; i_plane++ )
 368                 {
 369                     pi_left_skip[i_plane] +=
 370                         p_vout->p_sys->pp_vout[ i_vout ].i_width
 371                          * p_pic->p[i_plane].i_pitch / p_vout->output.i_width;
 372                 }
 373                 i_vout++;
 374                 continue;
 375             }
 376
 377             while( ( p_outpic =
 378                 vout_CreatePicture( p_vout->p_sys->pp_vout[ i_vout ].p_vout,
 379                                     0, 0, 0 )
 380                    ) == NULL )
 381             {
 382                 if( p_vout->b_die || p_vout->b_error )
 383                 {
 384                     vout_DestroyPicture(
 385                         p_vout->p_sys->pp_vout[ i_vout ].p_vout, p_outpic );
 386                     return;
 387                 }
 388
 389                 msleep( VOUT_OUTMEM_SLEEP );
 390             }
 391
 392             vout_DatePicture( p_vout->p_sys->pp_vout[ i_vout ].p_vout,
 393                               p_outpic, p_pic->date );
 394             vout_LinkPicture( p_vout->p_sys->pp_vout[ i_vout ].p_vout,
 395                               p_outpic );
 396
 397             for( i_plane = 0 ; i_plane < p_pic->i_planes ; i_plane++ )
 398             {
 399                 uint8_t *p_in, *p_in_end, *p_out;
 400                 int i_in_pitch = p_pic->p[i_plane].i_pitch;
 401                 int i_out_pitch = p_outpic->p[i_plane].i_pitch;
 402                 int i_copy_pitch = p_outpic->p[i_plane].i_visible_pitch;
 403
 404                 p_in = p_pic->p[i_plane].p_pixels
 405                         + pi_top_skip[i_plane] + pi_left_skip[i_plane];
 406
 407                 p_in_end = p_in + p_outpic->p[i_plane].i_visible_lines
 408                                    * p_pic->p[i_plane].i_pitch;
 409
 410                 p_out = p_outpic->p[i_plane].p_pixels;
 411
 412                 while( p_in < p_in_end )
 413                 {
 414                     p_vout->p_vlc->pf_memcpy( p_out, p_in, i_copy_pitch );
 415                     p_in += i_in_pitch;
 416                     p_out += i_out_pitch;
 417                 }
 418
 419                 pi_left_skip[i_plane] += i_out_pitch;
 420             }
 421
 422             vout_UnlinkPicture( p_vout->p_sys->pp_vout[ i_vout ].p_vout,
 423                                 p_outpic );
 424             vout_DisplayPicture( p_vout->p_sys->pp_vout[ i_vout ].p_vout,
 425                                  p_outpic );
 426
 427             i_vout++;
 428         }
 429
 430         for( i_plane = 0 ; i_plane < p_pic->i_planes ; i_plane++ )
 431         {
 432             pi_top_skip[i_plane] += p_vout->p_sys->pp_vout[ i_vout ].i_height
 433                                      * p_pic->p[i_plane].i_visible_lines
 434                                      / p_vout->output.i_height
 435                                      * p_pic->p[i_plane].i_pitch;
 436         }
 437     }
 438 }
 439
 440 /*****************************************************************************
 441  * RemoveAllVout: destroy all the child video output threads
 442  *****************************************************************************/
 443 static void RemoveAllVout( vout_thread_t *p_vout )
 444 {
 445     while( p_vout->p_sys->i_vout )
 446     {
 447          --p_vout->p_sys->i_vout;
 448          if( p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].b_active )
 449          {
 450              DEL_CALLBACKS(
 451                  p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].p_vout,
 452                  SendEvents );
 453              vlc_object_detach(
 454                  p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].p_vout );
 455              vout_Destroy(
 456                  p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].p_vout );
 457          }
 458     }
 459 }
 460
 461 /*****************************************************************************
 462  * SendEvents: forward mouse and keyboard events to the parent p_vout
 463  *****************************************************************************/
 464 static int SendEvents( vlc_object_t *p_this, char const *psz_var,
 465                        vlc_value_t oldval, vlc_value_t newval, void *_p_vout )
 466 {
 467     vout_thread_t *p_vout = (vout_thread_t *)_p_vout;
 468     int i_vout;
 469     vlc_value_t sentval = newval;
 470
 471     /* Find the video output index */
 472     for( i_vout = 0; i_vout < p_vout->p_sys->i_vout; i_vout++ )
 473     {
 474         if( p_this == (vlc_object_t *)p_vout->p_sys->pp_vout[ i_vout ].p_vout )
 475         {
 476             break;
 477         }
 478     }
 479
 480     if( i_vout == p_vout->p_sys->i_vout )
 481     {
 482         return VLC_EGENERIC;
 483     }
 484
 485     /* Translate the mouse coordinates */
 486     if( !strcmp( psz_var, "mouse-x" ) )
 487     {
 488         sentval.i_int += p_vout->output.i_width
 489                           * (i_vout % p_vout->p_sys->i_col)
 490                           / p_vout->p_sys->i_col;
 491     }
 492     else if( !strcmp( psz_var, "mouse-y" ) )
 493     {
 494         sentval.i_int += p_vout->output.i_height
 495                           * (i_vout / p_vout->p_sys->i_row)
 496                           / p_vout->p_sys->i_row;
 497     }
 498
 499     var_Set( p_vout, psz_var, sentval );
 500
 501     return VLC_SUCCESS;
 502 }
 503
 504 /*****************************************************************************
 505  * SendEventsToChild: forward events to the child/children vout
 506  *****************************************************************************/
 507 static int SendEventsToChild( vlc_object_t *p_this, char const *psz_var,
 508                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
 509 {
 510     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 511     int i_row, i_col, i_vout = 0;
 512
 513     for( i_row = 0; i_row < p_vout->p_sys->i_row; i_row++ )
 514     {
 515         for( i_col = 0; i_col < p_vout->p_sys->i_col; i_col++ )
 516         {
 517             var_Set( p_vout->p_sys->pp_vout[ i_vout ].p_vout, psz_var, newval);
 518             if( !strcmp( psz_var, "fullscreen" ) ) break;
 519             i_vout++;
 520         }
 521     }
 522
 523     return VLC_SUCCESS;
 524 }