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: wall.c,v 1.11 2003/10/15 22:49:48 gbazin Exp $
   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 videowindows 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 videowindows 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     add_category_hint( N_("Miscellaneous"), NULL, VLC_FALSE );
  67     add_integer( "wall-cols", 3, NULL, COLS_TEXT, COLS_LONGTEXT, VLC_FALSE );
  68     add_integer( "wall-rows", 3, NULL, ROWS_TEXT, ROWS_LONGTEXT, VLC_FALSE );
  69     add_string( "wall-active", NULL, NULL, ACTIVE_TEXT, ACTIVE_LONGTEXT, VLC_FALSE );
  70     set_description( _("wall video filter") );
  71     set_capability( "video filter", 0 );
  72     add_shortcut( "wall" );
  73     set_callbacks( Create, Destroy );
  74 vlc_module_end();
  75
  76 /*****************************************************************************
  77  * vout_sys_t: Wall video output method descriptor
  78  *****************************************************************************
  79  * This structure is part of the video output thread descriptor.
  80  * It describes the Wall specific properties of an output thread.
  81  *****************************************************************************/
  82 struct vout_sys_t
  83 {
  84     int    i_col;
  85     int    i_row;
  86     int    i_vout;
  87     struct vout_list_t
  88     {
  89         vlc_bool_t b_active;
  90         int i_width;
  91         int i_height;
  92         vout_thread_t *p_vout;
  93     } *pp_vout;
  94 };
  95
  96 /*****************************************************************************
  97  * Create: allocates Wall video thread output method
  98  *****************************************************************************
  99  * This function allocates and initializes a Wall vout method.
 100  *****************************************************************************/
 101 static int Create( vlc_object_t *p_this )
 102 {
 103     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 104     char *psz_method, *psz_tmp, *psz_method_tmp;
 105     int i_vout;
 106
 107     /* Allocate structure */
 108     p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
 109     if( p_vout->p_sys == NULL )
 110     {
 111         msg_Err( p_vout, "out of memory" );
 112         return VLC_ENOMEM;
 113     }
 114
 115     p_vout->pf_init = Init;
 116     p_vout->pf_end = End;
 117     p_vout->pf_manage = NULL;
 118     p_vout->pf_render = Render;
 119     p_vout->pf_display = NULL;
 120
 121     /* Look what method was requested */
 122     p_vout->p_sys->i_col = config_GetInt( p_vout, "wall-cols" );
 123     p_vout->p_sys->i_row = config_GetInt( p_vout, "wall-rows" );
 124
 125     p_vout->p_sys->i_col = __MAX( 1, __MIN( 15, p_vout->p_sys->i_col ) );
 126     p_vout->p_sys->i_row = __MAX( 1, __MIN( 15, p_vout->p_sys->i_row ) );
 127
 128     msg_Dbg( p_vout, "opening a %i x %i wall",
 129              p_vout->p_sys->i_col, p_vout->p_sys->i_row );
 130
 131     p_vout->p_sys->pp_vout = malloc( p_vout->p_sys->i_row *
 132                                      p_vout->p_sys->i_col *
 133                                      sizeof(struct vout_list_t) );
 134     if( p_vout->p_sys->pp_vout == NULL )
 135     {
 136         msg_Err( p_vout, "out of memory" );
 137         free( p_vout->p_sys );
 138         return VLC_ENOMEM;
 139     }
 140
 141     psz_method_tmp = psz_method = config_GetPsz( p_vout, "wall-active" );
 142
 143     /* If no trailing vout are specified, take them all */
 144     if( psz_method == NULL )
 145     {
 146         for( i_vout = p_vout->p_sys->i_row * p_vout->p_sys->i_col;
 147              i_vout--; )
 148         {
 149             p_vout->p_sys->pp_vout[i_vout].b_active = 1;
 150         }
 151     }
 152     /* If trailing vout are specified, activate only the requested ones */
 153     else
 154     {
 155         for( i_vout = p_vout->p_sys->i_row * p_vout->p_sys->i_col;
 156              i_vout--; )
 157         {
 158             p_vout->p_sys->pp_vout[i_vout].b_active = 0;
 159         }
 160
 161         while( *psz_method )
 162         {
 163             psz_tmp = psz_method;
 164             while( *psz_tmp && *psz_tmp != ',' )
 165             {
 166                 psz_tmp++;
 167             }
 168
 169             if( *psz_tmp )
 170             {
 171                 *psz_tmp = '\0';
 172                 i_vout = atoi( psz_method );
 173                 psz_method = psz_tmp + 1;
 174             }
 175             else
 176             {
 177                 i_vout = atoi( psz_method );
 178                 psz_method = psz_tmp;
 179             }
 180
 181             if( i_vout >= 0 &&
 182                 i_vout < p_vout->p_sys->i_row * p_vout->p_sys->i_col )
 183             {
 184                 p_vout->p_sys->pp_vout[i_vout].b_active = 1;
 185             }
 186         }
 187     }
 188
 189     free( psz_method_tmp );
 190
 191     return VLC_SUCCESS;
 192 }
 193
 194 /*****************************************************************************
 195  * Init: initialize Wall video thread output method
 196  *****************************************************************************/
 197 static int Init( vout_thread_t *p_vout )
 198 {
 199     int i_index, i_row, i_col, i_width, i_height;
 200     picture_t *p_pic;
 201
 202     I_OUTPUTPICTURES = 0;
 203
 204     /* Initialize the output structure */
 205     p_vout->output.i_chroma = p_vout->render.i_chroma;
 206     p_vout->output.i_width  = p_vout->render.i_width;
 207     p_vout->output.i_height = p_vout->render.i_height;
 208     p_vout->output.i_aspect = p_vout->render.i_aspect;
 209
 210     /* Try to open the real video output */
 211     msg_Dbg( p_vout, "spawning the real video outputs" );
 212
 213     p_vout->p_sys->i_vout = 0;
 214
 215     /* FIXME: use bresenham instead of those ugly divisions */
 216     for( i_row = 0; i_row < p_vout->p_sys->i_row; i_row++ )
 217     {
 218         for( i_col = 0; i_col < p_vout->p_sys->i_col; i_col++ )
 219         {
 220             if( i_col + 1 < p_vout->p_sys->i_col )
 221             {
 222                 i_width = ( p_vout->render.i_width
 223                              / p_vout->p_sys->i_col ) & ~0x1;
 224             }
 225             else
 226             {
 227                 i_width = p_vout->render.i_width
 228                            - ( ( p_vout->render.i_width
 229                                   / p_vout->p_sys->i_col ) & ~0x1 ) * i_col;
 230             }
 231
 232             if( i_row + 1 < p_vout->p_sys->i_row )
 233             {
 234                 i_height = ( p_vout->render.i_height
 235                               / p_vout->p_sys->i_row ) & ~0x3;
 236             }
 237             else
 238             {
 239                 i_height = p_vout->render.i_height
 240                             - ( ( p_vout->render.i_height
 241                                    / p_vout->p_sys->i_row ) & ~0x3 ) * i_row;
 242             }
 243
 244             p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].i_width = i_width;
 245             p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].i_height = i_height;
 246
 247             if( !p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].b_active )
 248             {
 249                 p_vout->p_sys->i_vout++;
 250                 continue;
 251             }
 252
 253             p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].p_vout =
 254                 vout_Create( p_vout, i_width, i_height,
 255                              p_vout->render.i_chroma,
 256                              p_vout->render.i_aspect
 257                               * p_vout->render.i_height / i_height
 258                               * i_width / p_vout->render.i_width );
 259             if( p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].p_vout == NULL )
 260             {
 261                 msg_Err( p_vout, "failed to get %ix%i vout threads",
 262                                  p_vout->p_sys->i_col, p_vout->p_sys->i_row );
 263                 RemoveAllVout( p_vout );
 264                 return VLC_EGENERIC;
 265             }
 266             ADD_CALLBACKS(
 267                 p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].p_vout,
 268                 SendEvents );
 269
 270             p_vout->p_sys->i_vout++;
 271         }
 272     }
 273
 274     ALLOCATE_DIRECTBUFFERS( VOUT_MAX_PICTURES );
 275
 276     ADD_PARENT_CALLBACKS( SendEventsToChild );
 277
 278     return VLC_SUCCESS;
 279 }
 280
 281 /*****************************************************************************
 282  * End: terminate Wall video thread output method
 283  *****************************************************************************/
 284 static void End( vout_thread_t *p_vout )
 285 {
 286     int i_index;
 287
 288     /* Free the fake output buffers we allocated */
 289     for( i_index = I_OUTPUTPICTURES ; i_index ; )
 290     {
 291         i_index--;
 292         free( PP_OUTPUTPICTURE[ i_index ]->p_data_orig );
 293     }
 294 }
 295
 296 /*****************************************************************************
 297  * Destroy: destroy Wall video thread output method
 298  *****************************************************************************
 299  * Terminate an output method created by WallCreateOutputMethod
 300  *****************************************************************************/
 301 static void Destroy( vlc_object_t *p_this )
 302 {
 303     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 304
 305     RemoveAllVout( p_vout );
 306
 307     DEL_PARENT_CALLBACKS( SendEventsToChild );
 308
 309     free( p_vout->p_sys->pp_vout );
 310     free( p_vout->p_sys );
 311 }
 312
 313 /*****************************************************************************
 314  * Render: displays previously rendered output
 315  *****************************************************************************
 316  * This function send the currently rendered image to Wall image, waits
 317  * until it is displayed and switch the two rendering buffers, preparing next
 318  * frame.
 319  *****************************************************************************/
 320 static void Render( vout_thread_t *p_vout, picture_t *p_pic )
 321 {
 322     picture_t *p_outpic = NULL;
 323     int i_col, i_row, i_vout, i_plane;
 324     int pi_left_skip[VOUT_MAX_PLANES], pi_top_skip[VOUT_MAX_PLANES];
 325
 326     i_vout = 0;
 327
 328     for( i_plane = 0 ; i_plane < p_pic->i_planes ; i_plane++ )
 329     {
 330         pi_top_skip[i_plane] = 0;
 331     }
 332
 333     for( i_row = 0; i_row < p_vout->p_sys->i_row; i_row++ )
 334     {
 335         for( i_plane = 0 ; i_plane < p_pic->i_planes ; i_plane++ )
 336         {
 337             pi_left_skip[i_plane] = 0;
 338         }
 339
 340         for( i_col = 0; i_col < p_vout->p_sys->i_col; i_col++ )
 341         {
 342             if( !p_vout->p_sys->pp_vout[ i_vout ].b_active )
 343             {
 344                 for( i_plane = 0 ; i_plane < p_pic->i_planes ; i_plane++ )
 345                 {
 346                     pi_left_skip[i_plane] +=
 347                         p_vout->p_sys->pp_vout[ i_vout ].i_width
 348                          * p_pic->p[i_plane].i_pitch / p_vout->output.i_width;
 349                 }
 350                 i_vout++;
 351                 continue;
 352             }
 353
 354             while( ( p_outpic =
 355                 vout_CreatePicture( p_vout->p_sys->pp_vout[ i_vout ].p_vout,
 356                                     0, 0, 0 )
 357                    ) == NULL )
 358             {
 359                 if( p_vout->b_die || p_vout->b_error )
 360                 {
 361                     vout_DestroyPicture(
 362                         p_vout->p_sys->pp_vout[ i_vout ].p_vout, p_outpic );
 363                     return;
 364                 }
 365
 366                 msleep( VOUT_OUTMEM_SLEEP );
 367             }
 368
 369             vout_DatePicture( p_vout->p_sys->pp_vout[ i_vout ].p_vout,
 370                               p_outpic, p_pic->date );
 371             vout_LinkPicture( p_vout->p_sys->pp_vout[ i_vout ].p_vout,
 372                               p_outpic );
 373
 374             for( i_plane = 0 ; i_plane < p_pic->i_planes ; i_plane++ )
 375             {
 376                 uint8_t *p_in, *p_in_end, *p_out;
 377                 int i_in_pitch = p_pic->p[i_plane].i_pitch;
 378                 int i_out_pitch = p_outpic->p[i_plane].i_pitch;
 379                 int i_copy_pitch = p_outpic->p[i_plane].i_visible_pitch;
 380
 381                 p_in = p_pic->p[i_plane].p_pixels
 382                         + pi_top_skip[i_plane] + pi_left_skip[i_plane];
 383
 384                 p_in_end = p_in + p_outpic->p[i_plane].i_lines
 385                                    * p_pic->p[i_plane].i_pitch;
 386
 387                 p_out = p_outpic->p[i_plane].p_pixels;
 388
 389                 while( p_in < p_in_end )
 390                 {
 391                     p_vout->p_vlc->pf_memcpy( p_out, p_in, i_copy_pitch );
 392                     p_in += i_in_pitch;
 393                     p_out += i_out_pitch;
 394                 }
 395
 396                 pi_left_skip[i_plane] += i_out_pitch;
 397             }
 398
 399             vout_UnlinkPicture( p_vout->p_sys->pp_vout[ i_vout ].p_vout,
 400                                 p_outpic );
 401             vout_DisplayPicture( p_vout->p_sys->pp_vout[ i_vout ].p_vout,
 402                                  p_outpic );
 403
 404             i_vout++;
 405         }
 406
 407         for( i_plane = 0 ; i_plane < p_pic->i_planes ; i_plane++ )
 408         {
 409             pi_top_skip[i_plane] += p_vout->p_sys->pp_vout[ i_vout ].i_height
 410                                      * p_pic->p[i_plane].i_lines
 411                                      / p_vout->output.i_height
 412                                      * p_pic->p[i_plane].i_pitch;
 413         }
 414     }
 415 }
 416
 417 /*****************************************************************************
 418  * RemoveAllVout: destroy all the child video output threads
 419  *****************************************************************************/
 420 static void RemoveAllVout( vout_thread_t *p_vout )
 421 {
 422     while( p_vout->p_sys->i_vout )
 423     {
 424          --p_vout->p_sys->i_vout;
 425          if( p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].b_active )
 426          {
 427              DEL_CALLBACKS(
 428                  p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].p_vout,
 429                  SendEvents );
 430              vlc_object_detach(
 431                  p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].p_vout );
 432              vout_Destroy(
 433                  p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].p_vout );
 434          }
 435     }
 436 }
 437
 438 /*****************************************************************************
 439  * SendEvents: forward mouse and keyboard events to the parent p_vout
 440  *****************************************************************************/
 441 static int SendEvents( vlc_object_t *p_this, char const *psz_var,
 442                        vlc_value_t oldval, vlc_value_t newval, void *_p_vout )
 443 {
 444     vout_thread_t *p_vout = (vout_thread_t *)_p_vout;
 445     int i_vout;
 446     vlc_value_t sentval = newval;
 447
 448     /* Find the video output index */
 449     for( i_vout = 0; i_vout < p_vout->p_sys->i_vout; i_vout++ )
 450     {
 451         if( p_this == (vlc_object_t *)p_vout->p_sys->pp_vout[ i_vout ].p_vout )
 452         {
 453             break;
 454         }
 455     }
 456
 457     if( i_vout == p_vout->p_sys->i_vout )
 458     {
 459         return VLC_EGENERIC;
 460     }
 461
 462     /* Translate the mouse coordinates */
 463     if( !strcmp( psz_var, "mouse-x" ) )
 464     {
 465         sentval.i_int += p_vout->output.i_width
 466                           * (i_vout % p_vout->p_sys->i_col)
 467                           / p_vout->p_sys->i_col;
 468     }
 469     else if( !strcmp( psz_var, "mouse-y" ) )
 470     {
 471         sentval.i_int += p_vout->output.i_height
 472                           * (i_vout / p_vout->p_sys->i_row)
 473                           / p_vout->p_sys->i_row;
 474     }
 475
 476     var_Set( p_vout, psz_var, sentval );
 477
 478     return VLC_SUCCESS;
 479 }
 480
 481 /*****************************************************************************
 482  * SendEventsToChild: forward events to the child/children vout
 483  *****************************************************************************/
 484 static int SendEventsToChild( vlc_object_t *p_this, char const *psz_var,
 485                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
 486 {
 487     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 488     int i_row, i_col, i_vout = 0;
 489
 490     for( i_row = 0; i_row < p_vout->p_sys->i_row; i_row++ )
 491     {
 492         for( i_col = 0; i_col < p_vout->p_sys->i_col; i_col++ )
 493         {
 494             var_Set( p_vout->p_sys->pp_vout[ i_vout ].p_vout, psz_var, newval);
 495             if( !strcmp( psz_var, "fullscreen" ) ) break;
 496             i_vout++;
 497         }
 498     }
 499
 500     return VLC_SUCCESS;
 501 }