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 1.13 2004/01/25 20:05:28 hartman 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     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  * Create: allocates Wall video thread output method
  99  *****************************************************************************
 100  * This function allocates and initializes a Wall vout method.
 101  *****************************************************************************/
 102 static int Create( vlc_object_t *p_this )
 103 {
 104     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 105     char *psz_method, *psz_tmp, *psz_method_tmp;
 106     int i_vout;
 107
 108     /* Allocate structure */
 109     p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
 110     if( p_vout->p_sys == NULL )
 111     {
 112         msg_Err( p_vout, "out of memory" );
 113         return VLC_ENOMEM;
 114     }
 115
 116     p_vout->pf_init = Init;
 117     p_vout->pf_end = End;
 118     p_vout->pf_manage = NULL;
 119     p_vout->pf_render = Render;
 120     p_vout->pf_display = NULL;
 121
 122     /* Look what method was requested */
 123     p_vout->p_sys->i_col = config_GetInt( p_vout, "wall-cols" );
 124     p_vout->p_sys->i_row = config_GetInt( p_vout, "wall-rows" );
 125
 126     p_vout->p_sys->i_col = __MAX( 1, __MIN( 15, p_vout->p_sys->i_col ) );
 127     p_vout->p_sys->i_row = __MAX( 1, __MIN( 15, p_vout->p_sys->i_row ) );
 128
 129     msg_Dbg( p_vout, "opening a %i x %i wall",
 130              p_vout->p_sys->i_col, p_vout->p_sys->i_row );
 131
 132     p_vout->p_sys->pp_vout = malloc( p_vout->p_sys->i_row *
 133                                      p_vout->p_sys->i_col *
 134                                      sizeof(struct vout_list_t) );
 135     if( p_vout->p_sys->pp_vout == NULL )
 136     {
 137         msg_Err( p_vout, "out of memory" );
 138         free( p_vout->p_sys );
 139         return VLC_ENOMEM;
 140     }
 141
 142     psz_method_tmp = psz_method = config_GetPsz( p_vout, "wall-active" );
 143
 144     /* If no trailing vout are specified, take them all */
 145     if( psz_method == NULL )
 146     {
 147         for( i_vout = p_vout->p_sys->i_row * p_vout->p_sys->i_col;
 148              i_vout--; )
 149         {
 150             p_vout->p_sys->pp_vout[i_vout].b_active = 1;
 151         }
 152     }
 153     /* If trailing vout are specified, activate only the requested ones */
 154     else
 155     {
 156         for( i_vout = p_vout->p_sys->i_row * p_vout->p_sys->i_col;
 157              i_vout--; )
 158         {
 159             p_vout->p_sys->pp_vout[i_vout].b_active = 0;
 160         }
 161
 162         while( *psz_method )
 163         {
 164             psz_tmp = psz_method;
 165             while( *psz_tmp && *psz_tmp != ',' )
 166             {
 167                 psz_tmp++;
 168             }
 169
 170             if( *psz_tmp )
 171             {
 172                 *psz_tmp = '\0';
 173                 i_vout = atoi( psz_method );
 174                 psz_method = psz_tmp + 1;
 175             }
 176             else
 177             {
 178                 i_vout = atoi( psz_method );
 179                 psz_method = psz_tmp;
 180             }
 181
 182             if( i_vout >= 0 &&
 183                 i_vout < p_vout->p_sys->i_row * p_vout->p_sys->i_col )
 184             {
 185                 p_vout->p_sys->pp_vout[i_vout].b_active = 1;
 186             }
 187         }
 188     }
 189
 190     free( psz_method_tmp );
 191
 192     return VLC_SUCCESS;
 193 }
 194
 195 /*****************************************************************************
 196  * Init: initialize Wall video thread output method
 197  *****************************************************************************/
 198 static int Init( vout_thread_t *p_vout )
 199 {
 200     int i_index, i_row, i_col, i_width, i_height;
 201     picture_t *p_pic;
 202
 203     I_OUTPUTPICTURES = 0;
 204
 205     /* Initialize the output structure */
 206     p_vout->output.i_chroma = p_vout->render.i_chroma;
 207     p_vout->output.i_width  = p_vout->render.i_width;
 208     p_vout->output.i_height = p_vout->render.i_height;
 209     p_vout->output.i_aspect = p_vout->render.i_aspect;
 210
 211     /* Try to open the real video output */
 212     msg_Dbg( p_vout, "spawning the real video outputs" );
 213
 214     p_vout->p_sys->i_vout = 0;
 215
 216     /* FIXME: use bresenham instead of those ugly divisions */
 217     for( i_row = 0; i_row < p_vout->p_sys->i_row; i_row++ )
 218     {
 219         for( i_col = 0; i_col < p_vout->p_sys->i_col; i_col++ )
 220         {
 221             if( i_col + 1 < p_vout->p_sys->i_col )
 222             {
 223                 i_width = ( p_vout->render.i_width
 224                              / p_vout->p_sys->i_col ) & ~0x1;
 225             }
 226             else
 227             {
 228                 i_width = p_vout->render.i_width
 229                            - ( ( p_vout->render.i_width
 230                                   / p_vout->p_sys->i_col ) & ~0x1 ) * i_col;
 231             }
 232
 233             if( i_row + 1 < p_vout->p_sys->i_row )
 234             {
 235                 i_height = ( p_vout->render.i_height
 236                               / p_vout->p_sys->i_row ) & ~0x3;
 237             }
 238             else
 239             {
 240                 i_height = p_vout->render.i_height
 241                             - ( ( p_vout->render.i_height
 242                                    / p_vout->p_sys->i_row ) & ~0x3 ) * i_row;
 243             }
 244
 245             p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].i_width = i_width;
 246             p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].i_height = i_height;
 247
 248             if( !p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].b_active )
 249             {
 250                 p_vout->p_sys->i_vout++;
 251                 continue;
 252             }
 253
 254             p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].p_vout =
 255                 vout_Create( p_vout, i_width, i_height,
 256                              p_vout->render.i_chroma,
 257                              p_vout->render.i_aspect
 258                               * p_vout->render.i_height / i_height
 259                               * i_width / p_vout->render.i_width );
 260             if( p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].p_vout == NULL )
 261             {
 262                 msg_Err( p_vout, "failed to get %ix%i vout threads",
 263                                  p_vout->p_sys->i_col, p_vout->p_sys->i_row );
 264                 RemoveAllVout( p_vout );
 265                 return VLC_EGENERIC;
 266             }
 267             ADD_CALLBACKS(
 268                 p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].p_vout,
 269                 SendEvents );
 270
 271             p_vout->p_sys->i_vout++;
 272         }
 273     }
 274
 275     ALLOCATE_DIRECTBUFFERS( VOUT_MAX_PICTURES );
 276
 277     ADD_PARENT_CALLBACKS( SendEventsToChild );
 278
 279     return VLC_SUCCESS;
 280 }
 281
 282 /*****************************************************************************
 283  * End: terminate Wall video thread output method
 284  *****************************************************************************/
 285 static void End( vout_thread_t *p_vout )
 286 {
 287     int i_index;
 288
 289     /* Free the fake output buffers we allocated */
 290     for( i_index = I_OUTPUTPICTURES ; i_index ; )
 291     {
 292         i_index--;
 293         free( PP_OUTPUTPICTURE[ i_index ]->p_data_orig );
 294     }
 295 }
 296
 297 /*****************************************************************************
 298  * Destroy: destroy Wall video thread output method
 299  *****************************************************************************
 300  * Terminate an output method created by WallCreateOutputMethod
 301  *****************************************************************************/
 302 static void Destroy( vlc_object_t *p_this )
 303 {
 304     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 305
 306     RemoveAllVout( p_vout );
 307
 308     DEL_PARENT_CALLBACKS( SendEventsToChild );
 309
 310     free( p_vout->p_sys->pp_vout );
 311     free( p_vout->p_sys );
 312 }
 313
 314 /*****************************************************************************
 315  * Render: displays previously rendered output
 316  *****************************************************************************
 317  * This function send the currently rendered image to Wall image, waits
 318  * until it is displayed and switch the two rendering buffers, preparing next
 319  * frame.
 320  *****************************************************************************/
 321 static void Render( vout_thread_t *p_vout, picture_t *p_pic )
 322 {
 323     picture_t *p_outpic = NULL;
 324     int i_col, i_row, i_vout, i_plane;
 325     int pi_left_skip[VOUT_MAX_PLANES], pi_top_skip[VOUT_MAX_PLANES];
 326
 327     i_vout = 0;
 328
 329     for( i_plane = 0 ; i_plane < p_pic->i_planes ; i_plane++ )
 330     {
 331         pi_top_skip[i_plane] = 0;
 332     }
 333
 334     for( i_row = 0; i_row < p_vout->p_sys->i_row; i_row++ )
 335     {
 336         for( i_plane = 0 ; i_plane < p_pic->i_planes ; i_plane++ )
 337         {
 338             pi_left_skip[i_plane] = 0;
 339         }
 340
 341         for( i_col = 0; i_col < p_vout->p_sys->i_col; i_col++ )
 342         {
 343             if( !p_vout->p_sys->pp_vout[ i_vout ].b_active )
 344             {
 345                 for( i_plane = 0 ; i_plane < p_pic->i_planes ; i_plane++ )
 346                 {
 347                     pi_left_skip[i_plane] +=
 348                         p_vout->p_sys->pp_vout[ i_vout ].i_width
 349                          * p_pic->p[i_plane].i_pitch / p_vout->output.i_width;
 350                 }
 351                 i_vout++;
 352                 continue;
 353             }
 354
 355             while( ( p_outpic =
 356                 vout_CreatePicture( p_vout->p_sys->pp_vout[ i_vout ].p_vout,
 357                                     0, 0, 0 )
 358                    ) == NULL )
 359             {
 360                 if( p_vout->b_die || p_vout->b_error )
 361                 {
 362                     vout_DestroyPicture(
 363                         p_vout->p_sys->pp_vout[ i_vout ].p_vout, p_outpic );
 364                     return;
 365                 }
 366
 367                 msleep( VOUT_OUTMEM_SLEEP );
 368             }
 369
 370             vout_DatePicture( p_vout->p_sys->pp_vout[ i_vout ].p_vout,
 371                               p_outpic, p_pic->date );
 372             vout_LinkPicture( p_vout->p_sys->pp_vout[ i_vout ].p_vout,
 373                               p_outpic );
 374
 375             for( i_plane = 0 ; i_plane < p_pic->i_planes ; i_plane++ )
 376             {
 377                 uint8_t *p_in, *p_in_end, *p_out;
 378                 int i_in_pitch = p_pic->p[i_plane].i_pitch;
 379                 int i_out_pitch = p_outpic->p[i_plane].i_pitch;
 380                 int i_copy_pitch = p_outpic->p[i_plane].i_visible_pitch;
 381
 382                 p_in = p_pic->p[i_plane].p_pixels
 383                         + pi_top_skip[i_plane] + pi_left_skip[i_plane];
 384
 385                 p_in_end = p_in + p_outpic->p[i_plane].i_lines
 386                                    * p_pic->p[i_plane].i_pitch;
 387
 388                 p_out = p_outpic->p[i_plane].p_pixels;
 389
 390                 while( p_in < p_in_end )
 391                 {
 392                     p_vout->p_vlc->pf_memcpy( p_out, p_in, i_copy_pitch );
 393                     p_in += i_in_pitch;
 394                     p_out += i_out_pitch;
 395                 }
 396
 397                 pi_left_skip[i_plane] += i_out_pitch;
 398             }
 399
 400             vout_UnlinkPicture( p_vout->p_sys->pp_vout[ i_vout ].p_vout,
 401                                 p_outpic );
 402             vout_DisplayPicture( p_vout->p_sys->pp_vout[ i_vout ].p_vout,
 403                                  p_outpic );
 404
 405             i_vout++;
 406         }
 407
 408         for( i_plane = 0 ; i_plane < p_pic->i_planes ; i_plane++ )
 409         {
 410             pi_top_skip[i_plane] += p_vout->p_sys->pp_vout[ i_vout ].i_height
 411                                      * p_pic->p[i_plane].i_lines
 412                                      / p_vout->output.i_height
 413                                      * p_pic->p[i_plane].i_pitch;
 414         }
 415     }
 416 }
 417
 418 /*****************************************************************************
 419  * RemoveAllVout: destroy all the child video output threads
 420  *****************************************************************************/
 421 static void RemoveAllVout( vout_thread_t *p_vout )
 422 {
 423     while( p_vout->p_sys->i_vout )
 424     {
 425          --p_vout->p_sys->i_vout;
 426          if( p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].b_active )
 427          {
 428              DEL_CALLBACKS(
 429                  p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].p_vout,
 430                  SendEvents );
 431              vlc_object_detach(
 432                  p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].p_vout );
 433              vout_Destroy(
 434                  p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].p_vout );
 435          }
 436     }
 437 }
 438
 439 /*****************************************************************************
 440  * SendEvents: forward mouse and keyboard events to the parent p_vout
 441  *****************************************************************************/
 442 static int SendEvents( vlc_object_t *p_this, char const *psz_var,
 443                        vlc_value_t oldval, vlc_value_t newval, void *_p_vout )
 444 {
 445     vout_thread_t *p_vout = (vout_thread_t *)_p_vout;
 446     int i_vout;
 447     vlc_value_t sentval = newval;
 448
 449     /* Find the video output index */
 450     for( i_vout = 0; i_vout < p_vout->p_sys->i_vout; i_vout++ )
 451     {
 452         if( p_this == (vlc_object_t *)p_vout->p_sys->pp_vout[ i_vout ].p_vout )
 453         {
 454             break;
 455         }
 456     }
 457
 458     if( i_vout == p_vout->p_sys->i_vout )
 459     {
 460         return VLC_EGENERIC;
 461     }
 462
 463     /* Translate the mouse coordinates */
 464     if( !strcmp( psz_var, "mouse-x" ) )
 465     {
 466         sentval.i_int += p_vout->output.i_width
 467                           * (i_vout % p_vout->p_sys->i_col)
 468                           / p_vout->p_sys->i_col;
 469     }
 470     else if( !strcmp( psz_var, "mouse-y" ) )
 471     {
 472         sentval.i_int += p_vout->output.i_height
 473                           * (i_vout / p_vout->p_sys->i_row)
 474                           / p_vout->p_sys->i_row;
 475     }
 476
 477     var_Set( p_vout, psz_var, sentval );
 478
 479     return VLC_SUCCESS;
 480 }
 481
 482 /*****************************************************************************
 483  * SendEventsToChild: forward events to the child/children vout
 484  *****************************************************************************/
 485 static int SendEventsToChild( vlc_object_t *p_this, char const *psz_var,
 486                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
 487 {
 488     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 489     int i_row, i_col, i_vout = 0;
 490
 491     for( i_row = 0; i_row < p_vout->p_sys->i_row; i_row++ )
 492     {
 493         for( i_col = 0; i_col < p_vout->p_sys->i_col; i_col++ )
 494         {
 495             var_Set( p_vout->p_sys->pp_vout[ i_vout ].p_vout, psz_var, newval);
 496             if( !strcmp( psz_var, "fullscreen" ) ) break;
 497             i_vout++;
 498         }
 499     }
 500
 501     return VLC_SUCCESS;
 502 }