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_shortname( N_("Image wall" ));
  68     set_capability( "video filter", 0 );
  69     set_category( CAT_VIDEO );
  70     set_subcategory( SUBCAT_VIDEO_VFILTER );
  71
  72     add_integer( "wall-cols", 3, NULL, COLS_TEXT, COLS_LONGTEXT, VLC_FALSE );
  73     add_integer( "wall-rows", 3, NULL, ROWS_TEXT, ROWS_LONGTEXT, VLC_FALSE );
  74     add_string( "wall-active", NULL, NULL, ACTIVE_TEXT, ACTIVE_LONGTEXT, VLC_FALSE );
  75
  76     add_shortcut( "wall" );
  77     set_callbacks( Create, Destroy );
  78 vlc_module_end();
  79
  80 /*****************************************************************************
  81  * vout_sys_t: Wall video output method descriptor
  82  *****************************************************************************
  83  * This structure is part of the video output thread descriptor.
  84  * It describes the Wall specific properties of an output thread.
  85  *****************************************************************************/
  86 struct vout_sys_t
  87 {
  88     int    i_col;
  89     int    i_row;
  90     int    i_vout;
  91     struct vout_list_t
  92     {
  93         vlc_bool_t b_active;
  94         int i_width;
  95         int i_height;
  96         vout_thread_t *p_vout;
  97     } *pp_vout;
  98 };
  99
 100 /*****************************************************************************
 101  * Control: control facility for the vout (forwards to child vout)
 102  *****************************************************************************/
 103 static int Control( vout_thread_t *p_vout, int i_query, va_list args )
 104 {
 105     int i_row, i_col, i_vout = 0;
 106
 107     for( i_row = 0; i_row < p_vout->p_sys->i_row; i_row++ )
 108     {
 109         for( i_col = 0; i_col < p_vout->p_sys->i_col; i_col++ )
 110         {
 111             vout_vaControl( p_vout->p_sys->pp_vout[ i_vout ].p_vout,
 112                             i_query, args );
 113             i_vout++;
 114         }
 115     }
 116     return VLC_SUCCESS;
 117 }
 118
 119 /*****************************************************************************
 120  * Create: allocates Wall video thread output method
 121  *****************************************************************************
 122  * This function allocates and initializes a Wall vout method.
 123  *****************************************************************************/
 124 static int Create( vlc_object_t *p_this )
 125 {
 126     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 127     char *psz_method, *psz_tmp, *psz_method_tmp;
 128     int i_vout;
 129
 130     /* Allocate structure */
 131     p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
 132     if( p_vout->p_sys == NULL )
 133     {
 134         msg_Err( p_vout, "out of memory" );
 135         return VLC_ENOMEM;
 136     }
 137
 138     p_vout->pf_init = Init;
 139     p_vout->pf_end = End;
 140     p_vout->pf_manage = NULL;
 141     p_vout->pf_render = Render;
 142     p_vout->pf_display = NULL;
 143     p_vout->pf_control = Control;
 144
 145     /* Look what method was requested */
 146     p_vout->p_sys->i_col = config_GetInt( p_vout, "wall-cols" );
 147     p_vout->p_sys->i_row = config_GetInt( p_vout, "wall-rows" );
 148
 149     p_vout->p_sys->i_col = __MAX( 1, __MIN( 15, p_vout->p_sys->i_col ) );
 150     p_vout->p_sys->i_row = __MAX( 1, __MIN( 15, p_vout->p_sys->i_row ) );
 151
 152     msg_Dbg( p_vout, "opening a %i x %i wall",
 153              p_vout->p_sys->i_col, p_vout->p_sys->i_row );
 154
 155     p_vout->p_sys->pp_vout = malloc( p_vout->p_sys->i_row *
 156                                      p_vout->p_sys->i_col *
 157                                      sizeof(struct vout_list_t) );
 158     if( p_vout->p_sys->pp_vout == NULL )
 159     {
 160         msg_Err( p_vout, "out of memory" );
 161         free( p_vout->p_sys );
 162         return VLC_ENOMEM;
 163     }
 164
 165     psz_method_tmp = psz_method = config_GetPsz( p_vout, "wall-active" );
 166
 167     /* If no trailing vout are specified, take them all */
 168     if( psz_method == NULL )
 169     {
 170         for( i_vout = p_vout->p_sys->i_row * p_vout->p_sys->i_col;
 171              i_vout--; )
 172         {
 173             p_vout->p_sys->pp_vout[i_vout].b_active = 1;
 174         }
 175     }
 176     /* If trailing vout are specified, activate only the requested ones */
 177     else
 178     {
 179         for( i_vout = p_vout->p_sys->i_row * p_vout->p_sys->i_col;
 180              i_vout--; )
 181         {
 182             p_vout->p_sys->pp_vout[i_vout].b_active = 0;
 183         }
 184
 185         while( *psz_method )
 186         {
 187             psz_tmp = psz_method;
 188             while( *psz_tmp && *psz_tmp != ',' )
 189             {
 190                 psz_tmp++;
 191             }
 192
 193             if( *psz_tmp )
 194             {
 195                 *psz_tmp = '\0';
 196                 i_vout = atoi( psz_method );
 197                 psz_method = psz_tmp + 1;
 198             }
 199             else
 200             {
 201                 i_vout = atoi( psz_method );
 202                 psz_method = psz_tmp;
 203             }
 204
 205             if( i_vout >= 0 &&
 206                 i_vout < p_vout->p_sys->i_row * p_vout->p_sys->i_col )
 207             {
 208                 p_vout->p_sys->pp_vout[i_vout].b_active = 1;
 209             }
 210         }
 211     }
 212
 213     free( psz_method_tmp );
 214
 215     return VLC_SUCCESS;
 216 }
 217
 218 /*****************************************************************************
 219  * Init: initialize Wall video thread output method
 220  *****************************************************************************/
 221 static int Init( vout_thread_t *p_vout )
 222 {
 223     int i_index, i_row, i_col, i_width, i_height;
 224     picture_t *p_pic;
 225
 226     I_OUTPUTPICTURES = 0;
 227
 228     /* Initialize the output structure */
 229     p_vout->output.i_chroma = p_vout->render.i_chroma;
 230     p_vout->output.i_width  = p_vout->render.i_width;
 231     p_vout->output.i_height = p_vout->render.i_height;
 232     p_vout->output.i_aspect = p_vout->render.i_aspect;
 233
 234     /* Try to open the real video output */
 235     msg_Dbg( p_vout, "spawning the real video outputs" );
 236
 237     p_vout->p_sys->i_vout = 0;
 238
 239     /* FIXME: use bresenham instead of those ugly divisions */
 240     for( i_row = 0; i_row < p_vout->p_sys->i_row; i_row++ )
 241     {
 242         for( i_col = 0; i_col < p_vout->p_sys->i_col; i_col++ )
 243         {
 244             if( i_col + 1 < p_vout->p_sys->i_col )
 245             {
 246                 i_width = ( p_vout->render.i_width
 247                              / p_vout->p_sys->i_col ) & ~0x1;
 248             }
 249             else
 250             {
 251                 i_width = p_vout->render.i_width
 252                            - ( ( p_vout->render.i_width
 253                                   / p_vout->p_sys->i_col ) & ~0x1 ) * i_col;
 254             }
 255
 256             if( i_row + 1 < p_vout->p_sys->i_row )
 257             {
 258                 i_height = ( p_vout->render.i_height
 259                               / p_vout->p_sys->i_row ) & ~0x3;
 260             }
 261             else
 262             {
 263                 i_height = p_vout->render.i_height
 264                             - ( ( p_vout->render.i_height
 265                                    / p_vout->p_sys->i_row ) & ~0x3 ) * i_row;
 266             }
 267
 268             p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].i_width = i_width;
 269             p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].i_height = i_height;
 270
 271             if( !p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].b_active )
 272             {
 273                 p_vout->p_sys->i_vout++;
 274                 continue;
 275             }
 276
 277             p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].p_vout =
 278                 vout_Create( p_vout, i_width, i_height,
 279                              p_vout->render.i_chroma,
 280                              p_vout->render.i_aspect
 281                               * p_vout->render.i_height / i_height
 282                               * i_width / p_vout->render.i_width );
 283             if( p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].p_vout == NULL )
 284             {
 285                 msg_Err( p_vout, "failed to get %ix%i vout threads",
 286                                  p_vout->p_sys->i_col, p_vout->p_sys->i_row );
 287                 RemoveAllVout( p_vout );
 288                 return VLC_EGENERIC;
 289             }
 290             ADD_CALLBACKS(
 291                 p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].p_vout,
 292                 SendEvents );
 293
 294             p_vout->p_sys->i_vout++;
 295         }
 296     }
 297
 298     ALLOCATE_DIRECTBUFFERS( VOUT_MAX_PICTURES );
 299
 300     ADD_PARENT_CALLBACKS( SendEventsToChild );
 301
 302     return VLC_SUCCESS;
 303 }
 304
 305 /*****************************************************************************
 306  * End: terminate Wall video thread output method
 307  *****************************************************************************/
 308 static void End( vout_thread_t *p_vout )
 309 {
 310     int i_index;
 311
 312     /* Free the fake output buffers we allocated */
 313     for( i_index = I_OUTPUTPICTURES ; i_index ; )
 314     {
 315         i_index--;
 316         free( PP_OUTPUTPICTURE[ i_index ]->p_data_orig );
 317     }
 318 }
 319
 320 /*****************************************************************************
 321  * Destroy: destroy Wall video thread output method
 322  *****************************************************************************
 323  * Terminate an output method created by WallCreateOutputMethod
 324  *****************************************************************************/
 325 static void Destroy( vlc_object_t *p_this )
 326 {
 327     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 328
 329     RemoveAllVout( p_vout );
 330
 331     DEL_PARENT_CALLBACKS( SendEventsToChild );
 332
 333     free( p_vout->p_sys->pp_vout );
 334     free( p_vout->p_sys );
 335 }
 336
 337 /*****************************************************************************
 338  * Render: displays previously rendered output
 339  *****************************************************************************
 340  * This function send the currently rendered image to Wall image, waits
 341  * until it is displayed and switch the two rendering buffers, preparing next
 342  * frame.
 343  *****************************************************************************/
 344 static void Render( vout_thread_t *p_vout, picture_t *p_pic )
 345 {
 346     picture_t *p_outpic = NULL;
 347     int i_col, i_row, i_vout, i_plane;
 348     int pi_left_skip[VOUT_MAX_PLANES], pi_top_skip[VOUT_MAX_PLANES];
 349
 350     i_vout = 0;
 351
 352     for( i_plane = 0 ; i_plane < p_pic->i_planes ; i_plane++ )
 353     {
 354         pi_top_skip[i_plane] = 0;
 355     }
 356
 357     for( i_row = 0; i_row < p_vout->p_sys->i_row; i_row++ )
 358     {
 359         for( i_plane = 0 ; i_plane < p_pic->i_planes ; i_plane++ )
 360         {
 361             pi_left_skip[i_plane] = 0;
 362         }
 363
 364         for( i_col = 0; i_col < p_vout->p_sys->i_col; i_col++ )
 365         {
 366             if( !p_vout->p_sys->pp_vout[ i_vout ].b_active )
 367             {
 368                 for( i_plane = 0 ; i_plane < p_pic->i_planes ; i_plane++ )
 369                 {
 370                     pi_left_skip[i_plane] +=
 371                         p_vout->p_sys->pp_vout[ i_vout ].i_width
 372                          * p_pic->p[i_plane].i_pitch / p_vout->output.i_width;
 373                 }
 374                 i_vout++;
 375                 continue;
 376             }
 377
 378             while( ( p_outpic =
 379                 vout_CreatePicture( p_vout->p_sys->pp_vout[ i_vout ].p_vout,
 380                                     0, 0, 0 )
 381                    ) == NULL )
 382             {
 383                 if( p_vout->b_die || p_vout->b_error )
 384                 {
 385                     vout_DestroyPicture(
 386                         p_vout->p_sys->pp_vout[ i_vout ].p_vout, p_outpic );
 387                     return;
 388                 }
 389
 390                 msleep( VOUT_OUTMEM_SLEEP );
 391             }
 392
 393             vout_DatePicture( p_vout->p_sys->pp_vout[ i_vout ].p_vout,
 394                               p_outpic, p_pic->date );
 395             vout_LinkPicture( p_vout->p_sys->pp_vout[ i_vout ].p_vout,
 396                               p_outpic );
 397
 398             for( i_plane = 0 ; i_plane < p_pic->i_planes ; i_plane++ )
 399             {
 400                 uint8_t *p_in, *p_in_end, *p_out;
 401                 int i_in_pitch = p_pic->p[i_plane].i_pitch;
 402                 int i_out_pitch = p_outpic->p[i_plane].i_pitch;
 403                 int i_copy_pitch = p_outpic->p[i_plane].i_visible_pitch;
 404
 405                 p_in = p_pic->p[i_plane].p_pixels
 406                         + pi_top_skip[i_plane] + pi_left_skip[i_plane];
 407
 408                 p_in_end = p_in + p_outpic->p[i_plane].i_visible_lines
 409                                    * p_pic->p[i_plane].i_pitch;
 410
 411                 p_out = p_outpic->p[i_plane].p_pixels;
 412
 413                 while( p_in < p_in_end )
 414                 {
 415                     p_vout->p_vlc->pf_memcpy( p_out, p_in, i_copy_pitch );
 416                     p_in += i_in_pitch;
 417                     p_out += i_out_pitch;
 418                 }
 419
 420                 pi_left_skip[i_plane] += i_out_pitch;
 421             }
 422
 423             vout_UnlinkPicture( p_vout->p_sys->pp_vout[ i_vout ].p_vout,
 424                                 p_outpic );
 425             vout_DisplayPicture( p_vout->p_sys->pp_vout[ i_vout ].p_vout,
 426                                  p_outpic );
 427
 428             i_vout++;
 429         }
 430
 431         for( i_plane = 0 ; i_plane < p_pic->i_planes ; i_plane++ )
 432         {
 433             pi_top_skip[i_plane] += p_vout->p_sys->pp_vout[ i_vout ].i_height
 434                                      * p_pic->p[i_plane].i_visible_lines
 435                                      / p_vout->output.i_height
 436                                      * p_pic->p[i_plane].i_pitch;
 437         }
 438     }
 439 }
 440
 441 /*****************************************************************************
 442  * RemoveAllVout: destroy all the child video output threads
 443  *****************************************************************************/
 444 static void RemoveAllVout( vout_thread_t *p_vout )
 445 {
 446     while( p_vout->p_sys->i_vout )
 447     {
 448          --p_vout->p_sys->i_vout;
 449          if( p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].b_active )
 450          {
 451              DEL_CALLBACKS(
 452                  p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].p_vout,
 453                  SendEvents );
 454              vlc_object_detach(
 455                  p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].p_vout );
 456              vout_Destroy(
 457                  p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].p_vout );
 458          }
 459     }
 460 }
 461
 462 /*****************************************************************************
 463  * SendEvents: forward mouse and keyboard events to the parent p_vout
 464  *****************************************************************************/
 465 static int SendEvents( vlc_object_t *p_this, char const *psz_var,
 466                        vlc_value_t oldval, vlc_value_t newval, void *_p_vout )
 467 {
 468     vout_thread_t *p_vout = (vout_thread_t *)_p_vout;
 469     int i_vout;
 470     vlc_value_t sentval = newval;
 471
 472     /* Find the video output index */
 473     for( i_vout = 0; i_vout < p_vout->p_sys->i_vout; i_vout++ )
 474     {
 475         if( p_this == (vlc_object_t *)p_vout->p_sys->pp_vout[ i_vout ].p_vout )
 476         {
 477             break;
 478         }
 479     }
 480
 481     if( i_vout == p_vout->p_sys->i_vout )
 482     {
 483         return VLC_EGENERIC;
 484     }
 485
 486     /* Translate the mouse coordinates */
 487     if( !strcmp( psz_var, "mouse-x" ) )
 488     {
 489         sentval.i_int += p_vout->output.i_width
 490                           * (i_vout % p_vout->p_sys->i_col)
 491                           / p_vout->p_sys->i_col;
 492     }
 493     else if( !strcmp( psz_var, "mouse-y" ) )
 494     {
 495         sentval.i_int += p_vout->output.i_height
 496                           * (i_vout / p_vout->p_sys->i_row)
 497                           / p_vout->p_sys->i_row;
 498     }
 499
 500     var_Set( p_vout, psz_var, sentval );
 501
 502     return VLC_SUCCESS;
 503 }
 504
 505 /*****************************************************************************
 506  * SendEventsToChild: forward events to the child/children vout
 507  *****************************************************************************/
 508 static int SendEventsToChild( vlc_object_t *p_this, char const *psz_var,
 509                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
 510 {
 511     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 512     int i_row, i_col, i_vout = 0;
 513
 514     for( i_row = 0; i_row < p_vout->p_sys->i_row; i_row++ )
 515     {
 516         for( i_col = 0; i_col < p_vout->p_sys->i_col; i_col++ )
 517         {
 518             var_Set( p_vout->p_sys->pp_vout[ i_vout ].p_vout, psz_var, newval);
 519             if( !strcmp( psz_var, "fullscreen" ) ) break;
 520             i_vout++;
 521         }
 522     }
 523
 524     return VLC_SUCCESS;
 525 }