git.sesse.net Git - vlc/blob - plugins/filter/wall.c

   1 /*****************************************************************************
   2  * wall.c : Wall video plugin for vlc
   3  *****************************************************************************
   4  * Copyright (C) 2000, 2001 VideoLAN
   5  * $Id: wall.c,v 1.20 2002/05/30 08:17:04 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 <errno.h>
  28 #include <stdlib.h>                                      /* malloc(), free() */
  29 #include <string.h>
  30
  31 #include <videolan/vlc.h>
  32
  33 #include "video.h"
  34 #include "video_output.h"
  35
  36 #include "filter_common.h"
  37
  38 /*****************************************************************************
  39  * Capabilities defined in the other files.
  40  *****************************************************************************/
  41 static void vout_getfunctions( function_list_t * p_function_list );
  42
  43 /*****************************************************************************
  44  * Build configuration tree.
  45  *****************************************************************************/
  46 MODULE_CONFIG_START
  47 ADD_CATEGORY_HINT( N_("Miscellaneous"), NULL )
  48 ADD_INTEGER ( "wall-cols", 3, NULL, N_("Number of columns"),
  49               N_("Select the number of horizontal videowindows in which "
  50                  "to split the video") )
  51 ADD_INTEGER ( "wall-rows", 3, NULL, N_("Number of rows"),
  52               N_("Select the number of vertical videowindows in which "
  53                  "to split the video") )
  54 ADD_STRING ( "wall-active", NULL, NULL, N_("Active windows"),
  55              N_("comma separated list of active windows, defaults to all") )
  56 MODULE_CONFIG_STOP
  57
  58 MODULE_INIT_START
  59     SET_DESCRIPTION( _("image wall video module") )
  60     /* Capability score set to 0 because we don't want to be spawned
  61      * as a video output unless explicitly requested to */
  62     ADD_CAPABILITY( VOUT, 0 )
  63     ADD_SHORTCUT( "wall" )
  64 MODULE_INIT_STOP
  65
  66 MODULE_ACTIVATE_START
  67     vout_getfunctions( &p_module->p_functions->vout );
  68 MODULE_ACTIVATE_STOP
  69
  70 MODULE_DEACTIVATE_START
  71 MODULE_DEACTIVATE_STOP
  72
  73 /*****************************************************************************
  74  * vout_sys_t: Wall video output method descriptor
  75  *****************************************************************************
  76  * This structure is part of the video output thread descriptor.
  77  * It describes the Wall specific properties of an output thread.
  78  *****************************************************************************/
  79 typedef struct vout_sys_s
  80 {
  81     int    i_col;
  82     int    i_row;
  83     int    i_vout;
  84     struct vout_list_s
  85     {
  86         boolean_t b_active;
  87         int i_width;
  88         int i_height;
  89         struct vout_thread_s *p_vout;
  90     } *pp_vout;
  91
  92 } vout_sys_t;
  93
  94 /*****************************************************************************
  95  * Local prototypes
  96  *****************************************************************************/
  97 static int  vout_Create    ( vout_thread_t * );
  98 static int  vout_Init      ( vout_thread_t * );
  99 static void vout_End       ( vout_thread_t * );
 100 static void vout_Destroy   ( vout_thread_t * );
 101 static int  vout_Manage    ( vout_thread_t * );
 102 static void vout_Render    ( vout_thread_t *, struct picture_s * );
 103 static void vout_Display   ( vout_thread_t *, struct picture_s * );
 104
 105 static void RemoveAllVout  ( vout_thread_t *p_vout );
 106
 107 /*****************************************************************************
 108  * Functions exported as capabilities. They are declared as static so that
 109  * we don't pollute the namespace too much.
 110  *****************************************************************************/
 111 static void vout_getfunctions( function_list_t * p_function_list )
 112 {
 113     p_function_list->functions.vout.pf_create     = vout_Create;
 114     p_function_list->functions.vout.pf_init       = vout_Init;
 115     p_function_list->functions.vout.pf_end        = vout_End;
 116     p_function_list->functions.vout.pf_destroy    = vout_Destroy;
 117     p_function_list->functions.vout.pf_manage     = vout_Manage;
 118     p_function_list->functions.vout.pf_render     = vout_Render;
 119     p_function_list->functions.vout.pf_display    = vout_Display;
 120 }
 121
 122 /*****************************************************************************
 123  * vout_Create: allocates Wall video thread output method
 124  *****************************************************************************
 125  * This function allocates and initializes a Wall vout method.
 126  *****************************************************************************/
 127 static int vout_Create( vout_thread_t *p_vout )
 128 {
 129     char *psz_method, *psz_tmp, *psz_method_tmp;
 130     int i_vout;
 131
 132     /* Allocate structure */
 133     p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
 134     if( p_vout->p_sys == NULL )
 135     {
 136         intf_ErrMsg("error: %s", strerror(ENOMEM) );
 137         return( 1 );
 138     }
 139
 140     /* Look what method was requested */
 141     p_vout->p_sys->i_col = config_GetIntVariable( "wall-cols" );
 142     p_vout->p_sys->i_row = config_GetIntVariable( "wall-rows" );
 143
 144     p_vout->p_sys->i_col = __MAX( 1, __MIN( 15, p_vout->p_sys->i_col ) );
 145     p_vout->p_sys->i_row = __MAX( 1, __MIN( 15, p_vout->p_sys->i_row ) );
 146
 147     intf_WarnMsg( 3, "filter info: opening a %i x %i wall",
 148                   p_vout->p_sys->i_col, p_vout->p_sys->i_row );
 149
 150     p_vout->p_sys->pp_vout = malloc( p_vout->p_sys->i_row *
 151                                      p_vout->p_sys->i_col *
 152                                      sizeof(struct vout_list_s) );
 153     if( p_vout->p_sys->pp_vout == NULL )
 154     {
 155         intf_ErrMsg("error: %s", strerror(ENOMEM) );
 156         free( p_vout->p_sys );
 157         return( 1 );
 158     }
 159
 160     psz_method_tmp = psz_method = config_GetPszVariable( "wall-active" );
 161
 162     /* If no trailing vout are specified, take them all */
 163     if( psz_method == NULL )
 164     {
 165         for( i_vout = p_vout->p_sys->i_row * p_vout->p_sys->i_col;
 166              i_vout--; )
 167         {
 168             p_vout->p_sys->pp_vout[i_vout].b_active = 1;
 169         }
 170     }
 171     /* If trailing vout are specified, activate only the requested ones */
 172     else
 173     {
 174         for( i_vout = p_vout->p_sys->i_row * p_vout->p_sys->i_col;
 175              i_vout--; )
 176         {
 177             p_vout->p_sys->pp_vout[i_vout].b_active = 0;
 178         }
 179
 180         while( *psz_method )
 181         {
 182             psz_tmp = psz_method;
 183             while( *psz_tmp && *psz_tmp != ',' )
 184             {
 185                 psz_tmp++;
 186             }
 187
 188             if( *psz_tmp )
 189             {
 190                 *psz_tmp = '\0';
 191                 i_vout = atoi( psz_method );
 192                 psz_method = psz_tmp + 1;
 193             }
 194             else
 195             {
 196                 i_vout = atoi( psz_method );
 197                 psz_method = psz_tmp;
 198             }
 199
 200             if( i_vout >= 0 &&
 201                 i_vout < p_vout->p_sys->i_row * p_vout->p_sys->i_col )
 202             {
 203                 p_vout->p_sys->pp_vout[i_vout].b_active = 1;
 204             }
 205         }
 206     }
 207
 208     free( psz_method_tmp );
 209
 210     return( 0 );
 211 }
 212
 213 /*****************************************************************************
 214  * vout_Init: initialize Wall video thread output method
 215  *****************************************************************************/
 216 static int vout_Init( vout_thread_t *p_vout )
 217 {
 218     int i_index, i_row, i_col, i_width, i_height;
 219     char *psz_filter;
 220     picture_t *p_pic;
 221
 222     I_OUTPUTPICTURES = 0;
 223
 224     /* Initialize the output structure */
 225     p_vout->output.i_chroma = p_vout->render.i_chroma;
 226     p_vout->output.i_width  = p_vout->render.i_width;
 227     p_vout->output.i_height = p_vout->render.i_height;
 228     p_vout->output.i_aspect = p_vout->render.i_aspect;
 229
 230     /* Try to open the real video output */
 231     psz_filter = config_GetPszVariable( "filter" );
 232     config_PutPszVariable( "filter", NULL );
 233
 234     intf_WarnMsg( 1, "filter: 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_CreateThread( NULL, 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                 intf_ErrMsg( "vout error: 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                 config_PutPszVariable( "filter", psz_filter );
 288                 if( psz_filter ) free( psz_filter );
 289                 return 0;
 290             }
 291
 292             p_vout->p_sys->i_vout++;
 293         }
 294     }
 295
 296     config_PutPszVariable( "filter", psz_filter );
 297     if( psz_filter ) free( psz_filter );
 298
 299     ALLOCATE_DIRECTBUFFERS( VOUT_MAX_PICTURES );
 300
 301     return( 0 );
 302 }
 303
 304 /*****************************************************************************
 305  * vout_End: terminate Wall video thread output method
 306  *****************************************************************************/
 307 static void vout_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  * vout_Destroy: destroy Wall video thread output method
 321  *****************************************************************************
 322  * Terminate an output method created by WallCreateOutputMethod
 323  *****************************************************************************/
 324 static void vout_Destroy( vout_thread_t *p_vout )
 325 {
 326     RemoveAllVout( p_vout );
 327
 328     free( p_vout->p_sys->pp_vout );
 329     free( p_vout->p_sys );
 330 }
 331
 332 /*****************************************************************************
 333  * vout_Manage: handle Wall events
 334  *****************************************************************************
 335  * This function should be called regularly by video output thread. It manages
 336  * console events. It returns a non null value on error.
 337  *****************************************************************************/
 338 static int vout_Manage( vout_thread_t *p_vout )
 339 {
 340     return( 0 );
 341 }
 342
 343 /*****************************************************************************
 344  * vout_Render: displays previously rendered output
 345  *****************************************************************************
 346  * This function send the currently rendered image to Wall image, waits
 347  * until it is displayed and switch the two rendering buffers, preparing next
 348  * frame.
 349  *****************************************************************************/
 350 static void vout_Render( vout_thread_t *p_vout, picture_t *p_pic )
 351 {
 352     picture_t *p_outpic = NULL;
 353     int i_col, i_row, i_vout, i_plane;
 354     int pi_left_skip[VOUT_MAX_PLANES], pi_top_skip[VOUT_MAX_PLANES];
 355
 356     i_vout = 0;
 357
 358     for( i_plane = 0 ; i_plane < p_pic->i_planes ; i_plane++ )
 359     {
 360         pi_top_skip[i_plane] = 0;
 361     }
 362
 363     for( i_row = 0; i_row < p_vout->p_sys->i_row; i_row++ )
 364     {
 365         for( i_plane = 0 ; i_plane < p_pic->i_planes ; i_plane++ )
 366         {
 367             pi_left_skip[i_plane] = 0;
 368         }
 369
 370         for( i_col = 0; i_col < p_vout->p_sys->i_col; i_col++ )
 371         {
 372             if( !p_vout->p_sys->pp_vout[ i_vout ].b_active )
 373             {
 374                 for( i_plane = 0 ; i_plane < p_pic->i_planes ; i_plane++ )
 375                 {
 376                     pi_left_skip[i_plane] +=
 377                         p_vout->p_sys->pp_vout[ i_vout ].i_width
 378                          * p_pic->p[i_plane].i_pitch / p_vout->output.i_width;
 379                 }
 380                 i_vout++;
 381                 continue;
 382             }
 383
 384             while( ( p_outpic =
 385                 vout_CreatePicture( p_vout->p_sys->pp_vout[ i_vout ].p_vout,
 386                                     0, 0, 0 )
 387                    ) == NULL )
 388             {
 389                 if( p_vout->b_die || p_vout->b_error )
 390                 {
 391                     vout_DestroyPicture(
 392                         p_vout->p_sys->pp_vout[ i_vout ].p_vout, p_outpic );
 393                     return;
 394                 }
 395
 396                 msleep( VOUT_OUTMEM_SLEEP );
 397             }
 398
 399             vout_DatePicture( p_vout->p_sys->pp_vout[ i_vout ].p_vout,
 400                               p_outpic, p_pic->date );
 401             vout_LinkPicture( p_vout->p_sys->pp_vout[ i_vout ].p_vout,
 402                               p_outpic );
 403
 404             for( i_plane = 0 ; i_plane < p_pic->i_planes ; i_plane++ )
 405             {
 406                 u8 *p_in, *p_in_end, *p_out;
 407                 int i_in_pitch = p_pic->p[i_plane].i_pitch;
 408                 int i_out_pitch = p_outpic->p[i_plane].i_pitch;
 409
 410                 p_in = p_pic->p[i_plane].p_pixels
 411                         + pi_top_skip[i_plane] + pi_left_skip[i_plane];
 412
 413                 p_in_end = p_in + p_outpic->p[i_plane].i_lines
 414                                    * p_pic->p[i_plane].i_pitch;
 415
 416                 p_out = p_outpic->p[i_plane].p_pixels;
 417
 418                 while( p_in < p_in_end )
 419                 {
 420                     FAST_MEMCPY( p_out, p_in, i_out_pitch );
 421                     p_in += i_in_pitch;
 422                     p_out += i_out_pitch;
 423                 }
 424
 425                 pi_left_skip[i_plane] += i_out_pitch;
 426             }
 427
 428             vout_UnlinkPicture( p_vout->p_sys->pp_vout[ i_vout ].p_vout,
 429                                 p_outpic );
 430             vout_DisplayPicture( p_vout->p_sys->pp_vout[ i_vout ].p_vout,
 431                                  p_outpic );
 432
 433             i_vout++;
 434         }
 435
 436         for( i_plane = 0 ; i_plane < p_pic->i_planes ; i_plane++ )
 437         {
 438             pi_top_skip[i_plane] += p_vout->p_sys->pp_vout[ i_vout ].i_height
 439                                      * p_pic->p[i_plane].i_lines
 440                                      / p_vout->output.i_height
 441                                      * p_pic->p[i_plane].i_pitch;
 442         }
 443     }
 444 }
 445
 446 /*****************************************************************************
 447  * vout_Display: displays previously rendered output
 448  *****************************************************************************
 449  * This function send the currently rendered image to Invert image, waits
 450  * until it is displayed and switch the two rendering buffers, preparing next
 451  * frame.
 452  *****************************************************************************/
 453 static void vout_Display( vout_thread_t *p_vout, picture_t *p_pic )
 454 {
 455     ;
 456 }
 457
 458 /*****************************************************************************
 459  * RemoveAllVout: destroy all the child video output threads
 460  *****************************************************************************/
 461 static void RemoveAllVout( vout_thread_t *p_vout )
 462 {
 463     while( p_vout->p_sys->i_vout )
 464     {
 465          --p_vout->p_sys->i_vout;
 466          if( p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].b_active )
 467          {
 468              vout_DestroyThread(
 469                p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].p_vout, NULL );
 470          }
 471     }
 472 }
 473