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 1.16 2002/04/19 13:56:11 sam 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 MODULE_CONFIG_STOP
  48
  49 MODULE_INIT_START
  50     SET_DESCRIPTION( _("image wall video module") )
  51     /* Capability score set to 0 because we don't want to be spawned
  52      * as a video output unless explicitly requested to */
  53     ADD_CAPABILITY( VOUT, 0 )
  54     ADD_SHORTCUT( "wall" )
  55 MODULE_INIT_STOP
  56
  57 MODULE_ACTIVATE_START
  58     vout_getfunctions( &p_module->p_functions->vout );
  59 MODULE_ACTIVATE_STOP
  60
  61 MODULE_DEACTIVATE_START
  62 MODULE_DEACTIVATE_STOP
  63
  64 /*****************************************************************************
  65  * vout_sys_t: Wall video output method descriptor
  66  *****************************************************************************
  67  * This structure is part of the video output thread descriptor.
  68  * It describes the Wall specific properties of an output thread.
  69  *****************************************************************************/
  70 typedef struct vout_sys_s
  71 {
  72     int    i_col;
  73     int    i_row;
  74     int    i_vout;
  75     struct vout_list_s
  76     {
  77         boolean_t b_active;
  78         int i_width;
  79         int i_height;
  80         struct vout_thread_s *p_vout;
  81     } *pp_vout;
  82
  83 } vout_sys_t;
  84
  85 /*****************************************************************************
  86  * Local prototypes
  87  *****************************************************************************/
  88 static int  vout_Create    ( vout_thread_t * );
  89 static int  vout_Init      ( vout_thread_t * );
  90 static void vout_End       ( vout_thread_t * );
  91 static void vout_Destroy   ( vout_thread_t * );
  92 static int  vout_Manage    ( vout_thread_t * );
  93 static void vout_Render    ( vout_thread_t *, struct picture_s * );
  94 static void vout_Display   ( vout_thread_t *, struct picture_s * );
  95
  96 static void RemoveAllVout  ( vout_thread_t *p_vout );
  97
  98 /*****************************************************************************
  99  * Functions exported as capabilities. They are declared as static so that
 100  * we don't pollute the namespace too much.
 101  *****************************************************************************/
 102 static void vout_getfunctions( function_list_t * p_function_list )
 103 {
 104     p_function_list->functions.vout.pf_create     = vout_Create;
 105     p_function_list->functions.vout.pf_init       = vout_Init;
 106     p_function_list->functions.vout.pf_end        = vout_End;
 107     p_function_list->functions.vout.pf_destroy    = vout_Destroy;
 108     p_function_list->functions.vout.pf_manage     = vout_Manage;
 109     p_function_list->functions.vout.pf_render     = vout_Render;
 110     p_function_list->functions.vout.pf_display    = vout_Display;
 111 }
 112
 113 /*****************************************************************************
 114  * vout_Create: allocates Wall video thread output method
 115  *****************************************************************************
 116  * This function allocates and initializes a Wall vout method.
 117  *****************************************************************************/
 118 static int vout_Create( vout_thread_t *p_vout )
 119 {
 120     char *psz_method, *psz_tmp, *psz_method_tmp;
 121     int i_vout;
 122
 123     /* Allocate structure */
 124     p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
 125     if( p_vout->p_sys == NULL )
 126     {
 127         intf_ErrMsg("error: %s", strerror(ENOMEM) );
 128         return( 1 );
 129     }
 130
 131     /* Look what method was requested */
 132     if( !(psz_method = psz_method_tmp
 133           = config_GetPszVariable( "filter" )) )
 134     {
 135         intf_ErrMsg( "vout error: configuration variable %s empty",
 136                      "filter" );
 137         return( 1 );
 138     }
 139
 140     while( *psz_method && *psz_method != ':' )
 141     {
 142         psz_method++;
 143     }
 144
 145     if( *psz_method )
 146     {
 147         psz_method++;
 148         psz_tmp = psz_method;
 149
 150         while( *psz_tmp && *psz_tmp != 'x' && *psz_tmp != ':' )
 151         {
 152             psz_tmp++;
 153         }
 154
 155         if( *psz_tmp == 'x' )
 156         {
 157            *psz_tmp = '\0';
 158            p_vout->p_sys->i_col = atoi( psz_method );
 159
 160            psz_tmp++;
 161            psz_method = psz_tmp;
 162
 163            while(  *psz_tmp && *psz_tmp != ':' )
 164            {
 165               psz_tmp++;
 166            }
 167
 168            if( *psz_tmp )
 169            {
 170                *psz_tmp = '\0';
 171                p_vout->p_sys->i_row = atoi( psz_method );
 172                psz_method = psz_tmp + 1;
 173            }
 174            else
 175            {
 176                p_vout->p_sys->i_row = atoi( psz_method );
 177                psz_method = NULL;
 178            }
 179         }
 180         else if( *psz_tmp == ':' )
 181         {
 182             p_vout->p_sys->i_col = p_vout->p_sys->i_row = atoi( psz_method );
 183             psz_method = psz_tmp + 1;
 184         }
 185         else
 186         {
 187             p_vout->p_sys->i_col = p_vout->p_sys->i_row = atoi( psz_method );
 188             psz_method = NULL;
 189         }
 190     }
 191     else
 192     {
 193         intf_ErrMsg( "filter error: no valid wall size provided, "
 194                      "using wall:3x3" );
 195         p_vout->p_sys->i_col = 3;
 196         p_vout->p_sys->i_row = 3;
 197         psz_method = NULL;
 198     }
 199
 200     p_vout->p_sys->i_col = __MAX( 1, __MIN( 15, p_vout->p_sys->i_col ) );
 201     p_vout->p_sys->i_row = __MAX( 1, __MIN( 15, p_vout->p_sys->i_row ) );
 202
 203     intf_WarnMsg( 3, "filter info: opening a %i x %i wall",
 204                   p_vout->p_sys->i_col, p_vout->p_sys->i_row );
 205
 206     p_vout->p_sys->pp_vout = malloc( p_vout->p_sys->i_row *
 207                                      p_vout->p_sys->i_col *
 208                                      sizeof(struct vout_list_s) );
 209     if( p_vout->p_sys->pp_vout == NULL )
 210     {
 211         intf_ErrMsg("error: %s", strerror(ENOMEM) );
 212         free( psz_method_tmp );
 213         free( p_vout->p_sys );
 214         return( 1 );
 215     }
 216
 217     /* If no trailing vout are specified, take them all */
 218     if( psz_method == NULL )
 219     {
 220         for( i_vout = p_vout->p_sys->i_row * p_vout->p_sys->i_col;
 221              i_vout--; )
 222         {
 223             p_vout->p_sys->pp_vout[i_vout].b_active = 1;
 224         }
 225     }
 226     /* If trailing vout are specified, activate only the requested ones */
 227     else
 228     {
 229         for( i_vout = p_vout->p_sys->i_row * p_vout->p_sys->i_col;
 230              i_vout--; )
 231         {
 232             p_vout->p_sys->pp_vout[i_vout].b_active = 0;
 233         }
 234
 235         while( *psz_method )
 236         {
 237             psz_tmp = psz_method;
 238             while( *psz_tmp && *psz_tmp != ',' )
 239             {
 240                 psz_tmp++;
 241             }
 242
 243             if( *psz_tmp )
 244             {
 245                 *psz_tmp = '\0';
 246                 i_vout = atoi( psz_method );
 247                 psz_method = psz_tmp + 1;
 248             }
 249             else
 250             {
 251                 i_vout = atoi( psz_method );
 252                 psz_method = psz_tmp;
 253             }
 254
 255             if( i_vout >= 0 &&
 256                 i_vout < p_vout->p_sys->i_row * p_vout->p_sys->i_col )
 257             {
 258                 p_vout->p_sys->pp_vout[i_vout].b_active = 1;
 259             }
 260         }
 261     }
 262
 263     free( psz_method_tmp );
 264
 265     return( 0 );
 266 }
 267
 268 /*****************************************************************************
 269  * vout_Init: initialize Wall video thread output method
 270  *****************************************************************************/
 271 static int vout_Init( vout_thread_t *p_vout )
 272 {
 273     int i_index, i_row, i_col, i_width, i_height;
 274     char *psz_filter;
 275     picture_t *p_pic;
 276
 277     I_OUTPUTPICTURES = 0;
 278
 279     /* Initialize the output structure */
 280     p_vout->output.i_chroma = p_vout->render.i_chroma;
 281     p_vout->output.i_width  = p_vout->render.i_width;
 282     p_vout->output.i_height = p_vout->render.i_height;
 283     p_vout->output.i_aspect = p_vout->render.i_aspect;
 284
 285     /* Try to open the real video output */
 286     psz_filter = config_GetPszVariable( "filter" );
 287     config_PutPszVariable( "filter", NULL );
 288
 289     intf_WarnMsg( 1, "filter: spawning the real video outputs" );
 290
 291     p_vout->p_sys->i_vout = 0;
 292
 293     /* FIXME: use bresenham instead of those ugly divisions */
 294     for( i_row = 0; i_row < p_vout->p_sys->i_row; i_row++ )
 295     {
 296         for( i_col = 0; i_col < p_vout->p_sys->i_col; i_col++ )
 297         {
 298             if( i_col + 1 < p_vout->p_sys->i_col )
 299             {
 300                 i_width = ( p_vout->render.i_width
 301                              / p_vout->p_sys->i_col ) & ~0x1;
 302             }
 303             else
 304             {
 305                 i_width = p_vout->render.i_width
 306                            - ( ( p_vout->render.i_width
 307                                   / p_vout->p_sys->i_col ) & ~0x1 ) * i_col;
 308             }
 309
 310             if( i_row + 1 < p_vout->p_sys->i_row )
 311             {
 312                 i_height = ( p_vout->render.i_height
 313                               / p_vout->p_sys->i_row ) & ~0x3;
 314             }
 315             else
 316             {
 317                 i_height = p_vout->render.i_height
 318                             - ( ( p_vout->render.i_height
 319                                    / p_vout->p_sys->i_row ) & ~0x3 ) * i_row;
 320             }
 321
 322             p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].i_width = i_width;
 323             p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].i_height = i_height;
 324
 325             if( !p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].b_active )
 326             {
 327                 p_vout->p_sys->i_vout++;
 328                 continue;
 329             }
 330
 331             p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].p_vout =
 332                 vout_CreateThread( NULL, i_width, i_height,
 333                                    p_vout->render.i_chroma,
 334                                    p_vout->render.i_aspect
 335                                     * p_vout->render.i_height / i_height
 336                                     * i_width / p_vout->render.i_width );
 337             if( p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].p_vout == NULL )
 338             {
 339                 intf_ErrMsg( "vout error: failed to get %ix%i vout threads",
 340                              p_vout->p_sys->i_col, p_vout->p_sys->i_row );
 341                 RemoveAllVout( p_vout );
 342                 config_PutPszVariable( "filter", psz_filter );
 343                 if( psz_filter ) free( psz_filter );
 344                 return 0;
 345             }
 346
 347             p_vout->p_sys->i_vout++;
 348         }
 349     }
 350
 351     config_PutPszVariable( "filter", psz_filter );
 352     if( psz_filter ) free( psz_filter );
 353
 354     ALLOCATE_DIRECTBUFFERS( VOUT_MAX_PICTURES );
 355
 356     return( 0 );
 357 }
 358
 359 /*****************************************************************************
 360  * vout_End: terminate Wall video thread output method
 361  *****************************************************************************/
 362 static void vout_End( vout_thread_t *p_vout )
 363 {
 364     int i_index;
 365
 366     /* Free the fake output buffers we allocated */
 367     for( i_index = I_OUTPUTPICTURES ; i_index ; )
 368     {
 369         i_index--;
 370         free( PP_OUTPUTPICTURE[ i_index ]->p_data );
 371     }
 372 }
 373
 374 /*****************************************************************************
 375  * vout_Destroy: destroy Wall video thread output method
 376  *****************************************************************************
 377  * Terminate an output method created by WallCreateOutputMethod
 378  *****************************************************************************/
 379 static void vout_Destroy( vout_thread_t *p_vout )
 380 {
 381     RemoveAllVout( p_vout );
 382
 383     free( p_vout->p_sys->pp_vout );
 384     free( p_vout->p_sys );
 385 }
 386
 387 /*****************************************************************************
 388  * vout_Manage: handle Wall events
 389  *****************************************************************************
 390  * This function should be called regularly by video output thread. It manages
 391  * console events. It returns a non null value on error.
 392  *****************************************************************************/
 393 static int vout_Manage( vout_thread_t *p_vout )
 394 {
 395     return( 0 );
 396 }
 397
 398 /*****************************************************************************
 399  * vout_Render: displays previously rendered output
 400  *****************************************************************************
 401  * This function send the currently rendered image to Wall image, waits
 402  * until it is displayed and switch the two rendering buffers, preparing next
 403  * frame.
 404  *****************************************************************************/
 405 static void vout_Render( vout_thread_t *p_vout, picture_t *p_pic )
 406 {
 407     picture_t *p_outpic = NULL;
 408     int i_col, i_row, i_vout, i_plane;
 409     int pi_left_skip[VOUT_MAX_PLANES], pi_top_skip[VOUT_MAX_PLANES];
 410
 411     i_vout = 0;
 412
 413     for( i_plane = 0 ; i_plane < p_pic->i_planes ; i_plane++ )
 414     {
 415         pi_top_skip[i_plane] = 0;
 416     }
 417
 418     for( i_row = 0; i_row < p_vout->p_sys->i_row; i_row++ )
 419     {
 420         for( i_plane = 0 ; i_plane < p_pic->i_planes ; i_plane++ )
 421         {
 422             pi_left_skip[i_plane] = 0;
 423         }
 424
 425         for( i_col = 0; i_col < p_vout->p_sys->i_col; i_col++ )
 426         {
 427             if( !p_vout->p_sys->pp_vout[ i_vout ].b_active )
 428             {
 429                 for( i_plane = 0 ; i_plane < p_pic->i_planes ; i_plane++ )
 430                 {
 431                     pi_left_skip[i_plane] +=
 432                         p_vout->p_sys->pp_vout[ i_vout ].i_width
 433                          * p_pic->p[i_plane].i_pitch / p_vout->output.i_width;
 434                 }
 435                 i_vout++;
 436                 continue;
 437             }
 438
 439             while( ( p_outpic =
 440                 vout_CreatePicture( p_vout->p_sys->pp_vout[ i_vout ].p_vout,
 441                                     0, 0, 0 )
 442                    ) == NULL )
 443             {
 444                 if( p_vout->b_die || p_vout->b_error )
 445                 {
 446                     vout_DestroyPicture(
 447                         p_vout->p_sys->pp_vout[ i_vout ].p_vout, p_outpic );
 448                     return;
 449                 }
 450
 451                 msleep( VOUT_OUTMEM_SLEEP );
 452             }
 453
 454             vout_DatePicture( p_vout->p_sys->pp_vout[ i_vout ].p_vout,
 455                               p_outpic, p_pic->date );
 456             vout_LinkPicture( p_vout->p_sys->pp_vout[ i_vout ].p_vout,
 457                               p_outpic );
 458
 459             for( i_plane = 0 ; i_plane < p_pic->i_planes ; i_plane++ )
 460             {
 461                 u8 *p_in, *p_in_end, *p_out;
 462                 int i_in_pitch = p_pic->p[i_plane].i_pitch;
 463                 int i_out_pitch = p_outpic->p[i_plane].i_pitch;
 464
 465                 p_in = p_pic->p[i_plane].p_pixels
 466                         + pi_top_skip[i_plane] + pi_left_skip[i_plane];
 467
 468                 p_in_end = p_in + p_outpic->p[i_plane].i_lines
 469                                    * p_pic->p[i_plane].i_pitch;
 470
 471                 p_out = p_outpic->p[i_plane].p_pixels;
 472
 473                 while( p_in < p_in_end )
 474                 {
 475                     FAST_MEMCPY( p_out, p_in, i_out_pitch );
 476                     p_in += i_in_pitch;
 477                     p_out += i_out_pitch;
 478                 }
 479
 480                 pi_left_skip[i_plane] += i_out_pitch;
 481             }
 482
 483             vout_UnlinkPicture( p_vout->p_sys->pp_vout[ i_vout ].p_vout,
 484                                 p_outpic );
 485             vout_DisplayPicture( p_vout->p_sys->pp_vout[ i_vout ].p_vout,
 486                                  p_outpic );
 487
 488             i_vout++;
 489         }
 490
 491         for( i_plane = 0 ; i_plane < p_pic->i_planes ; i_plane++ )
 492         {
 493             pi_top_skip[i_plane] += p_vout->p_sys->pp_vout[ i_vout ].i_height
 494                                      * p_pic->p[i_plane].i_lines
 495                                      / p_vout->output.i_height
 496                                      * p_pic->p[i_plane].i_pitch;
 497         }
 498     }
 499 }
 500
 501 /*****************************************************************************
 502  * vout_Display: displays previously rendered output
 503  *****************************************************************************
 504  * This function send the currently rendered image to Invert image, waits
 505  * until it is displayed and switch the two rendering buffers, preparing next
 506  * frame.
 507  *****************************************************************************/
 508 static void vout_Display( vout_thread_t *p_vout, picture_t *p_pic )
 509 {
 510     ;
 511 }
 512
 513 /*****************************************************************************
 514  * RemoveAllVout: destroy all the child video output threads
 515  *****************************************************************************/
 516 static void RemoveAllVout( vout_thread_t *p_vout )
 517 {
 518     while( p_vout->p_sys->i_vout )
 519     {
 520          --p_vout->p_sys->i_vout;
 521          if( p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].b_active )
 522          {
 523              vout_DestroyThread(
 524                p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].p_vout, NULL );
 525          }
 526     }
 527 }
 528