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 1.10 2002/01/09 02:01:14 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         int i_width;
  78         int i_height;
  79         struct vout_thread_s *p_vout;
  80     } *pp_vout;
  81
  82 } vout_sys_t;
  83
  84 /*****************************************************************************
  85  * Local prototypes
  86  *****************************************************************************/
  87 static int  vout_Probe     ( probedata_t *p_data );
  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->pf_probe = vout_Probe;
 105     p_function_list->functions.vout.pf_create     = vout_Create;
 106     p_function_list->functions.vout.pf_init       = vout_Init;
 107     p_function_list->functions.vout.pf_end        = vout_End;
 108     p_function_list->functions.vout.pf_destroy    = vout_Destroy;
 109     p_function_list->functions.vout.pf_manage     = vout_Manage;
 110     p_function_list->functions.vout.pf_render     = vout_Render;
 111     p_function_list->functions.vout.pf_display    = vout_Display;
 112 }
 113
 114 /*****************************************************************************
 115  * intf_Probe: return a score
 116  *****************************************************************************/
 117 static int vout_Probe( probedata_t *p_data )
 118 {
 119     return( 0 );
 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     /* Allocate structure */
 130     p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
 131     if( p_vout->p_sys == NULL )
 132     {
 133         intf_ErrMsg("error: %s", strerror(ENOMEM) );
 134         return( 1 );
 135     }
 136
 137     p_vout->p_sys->i_col = 6;
 138     p_vout->p_sys->i_row = 6;
 139
 140     p_vout->p_sys->pp_vout = malloc( p_vout->p_sys->i_row *
 141                                      p_vout->p_sys->i_col *
 142                                      sizeof(struct vout_list_s) );
 143     if( p_vout->p_sys->pp_vout == NULL )
 144     {
 145         intf_ErrMsg("error: %s", strerror(ENOMEM) );
 146         free( p_vout->p_sys );
 147         return( 1 );
 148     }
 149
 150
 151     return( 0 );
 152 }
 153
 154 /*****************************************************************************
 155  * vout_Init: initialize Wall video thread output method
 156  *****************************************************************************/
 157 static int vout_Init( vout_thread_t *p_vout )
 158 {
 159     int i_index, i_row, i_col, i_width, i_height;
 160     char *psz_filter;
 161     picture_t *p_pic;
 162
 163     I_OUTPUTPICTURES = 0;
 164
 165     /* Initialize the output structure */
 166     p_vout->output.i_chroma = p_vout->render.i_chroma;
 167     p_vout->output.i_width  = p_vout->render.i_width;
 168     p_vout->output.i_height = p_vout->render.i_height;
 169     p_vout->output.i_aspect = p_vout->render.i_aspect;
 170
 171     /* Try to open the real video output */
 172     psz_filter = main_GetPszVariable( VOUT_FILTER_VAR, NULL );
 173     main_PutPszVariable( VOUT_FILTER_VAR, "" );
 174
 175     intf_WarnMsg( 1, "filter: spawning the real video outputs" );
 176
 177     p_vout->p_sys->i_vout = 0;
 178
 179     /* FIXME: use bresenham instead of those ugly divisions */
 180     for( i_row = 0; i_row < p_vout->p_sys->i_row; i_row++ )
 181     {
 182         for( i_col = 0; i_col < p_vout->p_sys->i_col; i_col++ )
 183         {
 184             if( i_col + 1 < p_vout->p_sys->i_col )
 185             {
 186                 i_width = ( p_vout->render.i_width
 187                              / p_vout->p_sys->i_col ) & ~0x1;
 188             }
 189             else
 190             {
 191                 i_width = p_vout->render.i_width
 192                            - ( ( p_vout->render.i_width
 193                                   / p_vout->p_sys->i_col ) & ~0x1 ) * i_col;
 194             }
 195
 196             if( i_row + 1 < p_vout->p_sys->i_row )
 197             {
 198                 i_height = ( p_vout->render.i_height
 199                               / p_vout->p_sys->i_row ) & ~0x3;
 200             }
 201             else
 202             {
 203                 i_height = p_vout->render.i_height
 204                             - ( ( p_vout->render.i_height
 205                                    / p_vout->p_sys->i_row ) & ~0x3 ) * i_row;
 206             }
 207
 208             p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].p_vout =
 209                 vout_CreateThread( NULL, i_width, i_height,
 210                                    p_vout->render.i_chroma,
 211                                    p_vout->render.i_aspect
 212                                     * p_vout->render.i_height / i_height
 213                                     * i_width / p_vout->render.i_width );
 214             if( p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].p_vout == NULL )
 215             {
 216                 intf_ErrMsg( "vout error: failed to get %ix%i vout threads",
 217                              p_vout->p_sys->i_col, p_vout->p_sys->i_row );
 218                 RemoveAllVout( p_vout );
 219                 return 0;
 220             }
 221
 222             p_vout->p_sys->i_vout++;
 223         }
 224     }
 225
 226     main_PutPszVariable( VOUT_FILTER_VAR, psz_filter );
 227
 228     ALLOCATE_DIRECTBUFFERS( VOUT_MAX_PICTURES );
 229
 230     return( 0 );
 231 }
 232
 233 /*****************************************************************************
 234  * vout_End: terminate Wall video thread output method
 235  *****************************************************************************/
 236 static void vout_End( vout_thread_t *p_vout )
 237 {
 238     int i_index;
 239
 240     /* Free the fake output buffers we allocated */
 241     for( i_index = I_OUTPUTPICTURES ; i_index ; )
 242     {
 243         i_index--;
 244         free( PP_OUTPUTPICTURE[ i_index ]->p_data );
 245     }
 246 }
 247
 248 /*****************************************************************************
 249  * vout_Destroy: destroy Wall video thread output method
 250  *****************************************************************************
 251  * Terminate an output method created by WallCreateOutputMethod
 252  *****************************************************************************/
 253 static void vout_Destroy( vout_thread_t *p_vout )
 254 {
 255     RemoveAllVout( p_vout );
 256
 257     free( p_vout->p_sys->pp_vout );
 258     free( p_vout->p_sys );
 259 }
 260
 261 /*****************************************************************************
 262  * vout_Manage: handle Wall events
 263  *****************************************************************************
 264  * This function should be called regularly by video output thread. It manages
 265  * console events. It returns a non null value on error.
 266  *****************************************************************************/
 267 static int vout_Manage( vout_thread_t *p_vout )
 268 {
 269     return( 0 );
 270 }
 271
 272 /*****************************************************************************
 273  * vout_Render: displays previously rendered output
 274  *****************************************************************************
 275  * This function send the currently rendered image to Wall image, waits
 276  * until it is displayed and switch the two rendering buffers, preparing next
 277  * frame.
 278  *****************************************************************************/
 279 static void vout_Render( vout_thread_t *p_vout, picture_t *p_pic )
 280 {
 281     picture_t *p_outpic = NULL;
 282     int i_col, i_row, i_vout, i_plane;
 283     int pi_left_skip[VOUT_MAX_PLANES], pi_top_skip[VOUT_MAX_PLANES];
 284
 285     i_vout = 0;
 286
 287     for( i_plane = 0 ; i_plane < p_pic->i_planes ; i_plane++ )
 288     {
 289         pi_top_skip[i_plane] = 0;
 290     }
 291
 292     for( i_row = 0; i_row < p_vout->p_sys->i_row; i_row++ )
 293     {
 294         for( i_plane = 0 ; i_plane < p_pic->i_planes ; i_plane++ )
 295         {
 296             pi_left_skip[i_plane] = 0;
 297         }
 298
 299         for( i_col = 0; i_col < p_vout->p_sys->i_col; i_col++ )
 300         {
 301             while( ( p_outpic =
 302                 vout_CreatePicture( p_vout->p_sys->pp_vout[ i_vout ].p_vout,
 303                                     0, 0, 0 )
 304                    ) == NULL )
 305             {
 306                 if( p_vout->b_die || p_vout->b_error )
 307                 {
 308                     vout_DestroyPicture(
 309                         p_vout->p_sys->pp_vout[ i_vout ].p_vout, p_outpic );
 310                     return;
 311                 }
 312
 313                 msleep( VOUT_OUTMEM_SLEEP );
 314             }
 315
 316             vout_DatePicture( p_vout->p_sys->pp_vout[ i_vout ].p_vout,
 317                               p_outpic, p_pic->date );
 318             vout_LinkPicture( p_vout->p_sys->pp_vout[ i_vout ].p_vout,
 319                               p_outpic );
 320
 321             for( i_plane = 0 ; i_plane < p_pic->i_planes ; i_plane++ )
 322             {
 323                 u8 *p_in, *p_in_end, *p_out;
 324                 int i_in_pitch = p_pic->p[i_plane].i_pitch;
 325                 int i_out_pitch = p_outpic->p[i_plane].i_pitch;
 326
 327                 p_in = p_pic->p[i_plane].p_pixels
 328                         + pi_top_skip[i_plane] + pi_left_skip[i_plane];
 329
 330                 p_in_end = p_in + p_outpic->p[i_plane].i_lines
 331                                    * p_pic->p[i_plane].i_pitch;
 332
 333                 p_out = p_outpic->p[i_plane].p_pixels;
 334
 335                 while( p_in < p_in_end )
 336                 {
 337                     FAST_MEMCPY( p_out, p_in, i_out_pitch );
 338                     p_in += i_in_pitch;
 339                     p_out += i_out_pitch;
 340                 }
 341
 342                 pi_left_skip[i_plane] += p_outpic->p[i_plane].i_pitch;
 343             }
 344
 345             vout_UnlinkPicture( p_vout->p_sys->pp_vout[ i_vout ].p_vout,
 346                                 p_outpic );
 347             vout_DisplayPicture( p_vout->p_sys->pp_vout[ i_vout ].p_vout,
 348                                  p_outpic );
 349
 350             i_vout++;
 351         }
 352
 353         for( i_plane = 0 ; i_plane < p_pic->i_planes ; i_plane++ )
 354         {
 355             pi_top_skip[i_plane] += p_outpic->p[i_plane].i_lines
 356                                      * p_pic->p[i_plane].i_pitch;
 357         }
 358     }
 359 }
 360
 361 /*****************************************************************************
 362  * vout_Display: displays previously rendered output
 363  *****************************************************************************
 364  * This function send the currently rendered image to Invert image, waits
 365  * until it is displayed and switch the two rendering buffers, preparing next
 366  * frame.
 367  *****************************************************************************/
 368 static void vout_Display( vout_thread_t *p_vout, picture_t *p_pic )
 369 {
 370     ;
 371 }
 372
 373 static void RemoveAllVout( vout_thread_t *p_vout )
 374 {
 375     while( p_vout->p_sys->i_vout )
 376     {
 377          --p_vout->p_sys->i_vout;
 378          vout_DestroyThread(
 379              p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].p_vout, NULL );
 380     }
 381 }
 382