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 1.6 2002/01/04 14:01:34 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     p_function_list->functions.vout.pf_setpalette = NULL;
 113 }
 114
 115 /*****************************************************************************
 116  * intf_Probe: return a score
 117  *****************************************************************************/
 118 static int vout_Probe( probedata_t *p_data )
 119 {
 120     return( 0 );
 121 }
 122
 123 /*****************************************************************************
 124  * vout_Create: allocates Wall video thread output method
 125  *****************************************************************************
 126  * This function allocates and initializes a Wall vout method.
 127  *****************************************************************************/
 128 static int vout_Create( vout_thread_t *p_vout )
 129 {
 130     /* Allocate structure */
 131     p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
 132     if( p_vout->p_sys == NULL )
 133     {
 134         intf_ErrMsg("error: %s", strerror(ENOMEM) );
 135         return( 1 );
 136     }
 137
 138     p_vout->p_sys->i_col = 3;
 139     p_vout->p_sys->i_row = 3;
 140
 141     p_vout->p_sys->pp_vout = malloc( p_vout->p_sys->i_row *
 142                                      p_vout->p_sys->i_col *
 143                                      sizeof(struct vout_list_s) );
 144     if( p_vout->p_sys->pp_vout == NULL )
 145     {
 146         intf_ErrMsg("error: %s", strerror(ENOMEM) );
 147         free( p_vout->p_sys );
 148         return( 1 );
 149     }
 150
 151
 152     return( 0 );
 153 }
 154
 155 /*****************************************************************************
 156  * vout_Init: initialize Wall video thread output method
 157  *****************************************************************************/
 158 static int vout_Init( vout_thread_t *p_vout )
 159 {
 160     int i_index, i_row, i_col, i_width, i_height;
 161     char *psz_filter;
 162     picture_t *p_pic;
 163
 164     I_OUTPUTPICTURES = 0;
 165
 166     /* Initialize the output structure */
 167     p_vout->output.i_chroma = p_vout->render.i_chroma;
 168     p_vout->output.i_width  = p_vout->render.i_width;
 169     p_vout->output.i_height = p_vout->render.i_height;
 170     p_vout->output.i_aspect = p_vout->render.i_aspect;
 171
 172     /* Try to open the real video output */
 173     psz_filter = main_GetPszVariable( VOUT_FILTER_VAR, NULL );
 174     main_PutPszVariable( VOUT_FILTER_VAR, "" );
 175
 176     intf_WarnMsg( 1, "filter: spawning the real video outputs" );
 177
 178     p_vout->p_sys->i_vout = 0;
 179
 180     /* FIXME: use bresenham instead of those ugly divisions */
 181     for( i_row = 0; i_row < p_vout->p_sys->i_row; i_row++ )
 182     {
 183         for( i_col = 0; i_col < p_vout->p_sys->i_col; i_col++ )
 184         {
 185             if( i_col + 1 < p_vout->p_sys->i_col )
 186             {
 187                 i_width = ( p_vout->render.i_width
 188                              / p_vout->p_sys->i_col ) & ~0x1;
 189             }
 190             else
 191             {
 192                 i_width = p_vout->render.i_width
 193                            - ( ( p_vout->render.i_width
 194                                   / p_vout->p_sys->i_col ) & ~0x1 ) * i_col;
 195             }
 196
 197             if( i_row + 1 < p_vout->p_sys->i_row )
 198             {
 199                 i_height = ( p_vout->render.i_height
 200                               / p_vout->p_sys->i_row ) & ~0x3;
 201             }
 202             else
 203             {
 204                 i_height = p_vout->render.i_height
 205                             - ( ( p_vout->render.i_height
 206                                    / p_vout->p_sys->i_row ) & ~0x3 ) * i_row;
 207             }
 208
 209             p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].p_vout =
 210                 vout_CreateThread( NULL, i_width, i_height,
 211                                    p_vout->render.i_chroma,
 212                                    p_vout->render.i_aspect
 213                                     * p_vout->render.i_height / i_height
 214                                     * i_width / p_vout->render.i_width );
 215             if( p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].p_vout == NULL )
 216             {
 217                 intf_ErrMsg( "vout error: failed to get %ix%i vout threads",
 218                              p_vout->p_sys->i_col, p_vout->p_sys->i_row );
 219                 RemoveAllVout( p_vout );
 220                 return 0;
 221             }
 222
 223             p_vout->p_sys->i_vout++;
 224         }
 225     }
 226
 227     main_PutPszVariable( VOUT_FILTER_VAR, psz_filter );
 228
 229     ALLOCATE_DIRECTBUFFERS( VOUT_MAX_PICTURES );
 230
 231     return( 0 );
 232 }
 233
 234 /*****************************************************************************
 235  * vout_End: terminate Wall video thread output method
 236  *****************************************************************************/
 237 static void vout_End( vout_thread_t *p_vout )
 238 {
 239     int i_index;
 240
 241     /* Free the fake output buffers we allocated */
 242     for( i_index = I_OUTPUTPICTURES ; i_index ; )
 243     {
 244         i_index--;
 245         free( PP_OUTPUTPICTURE[ i_index ]->p_data );
 246     }
 247 }
 248
 249 /*****************************************************************************
 250  * vout_Destroy: destroy Wall video thread output method
 251  *****************************************************************************
 252  * Terminate an output method created by WallCreateOutputMethod
 253  *****************************************************************************/
 254 static void vout_Destroy( vout_thread_t *p_vout )
 255 {
 256     RemoveAllVout( p_vout );
 257
 258     free( p_vout->p_sys->pp_vout );
 259     free( p_vout->p_sys );
 260 }
 261
 262 /*****************************************************************************
 263  * vout_Manage: handle Wall events
 264  *****************************************************************************
 265  * This function should be called regularly by video output thread. It manages
 266  * console events. It returns a non null value on error.
 267  *****************************************************************************/
 268 static int vout_Manage( vout_thread_t *p_vout )
 269 {
 270     return( 0 );
 271 }
 272
 273 /*****************************************************************************
 274  * vout_Render: displays previously rendered output
 275  *****************************************************************************
 276  * This function send the currently rendered image to Wall image, waits
 277  * until it is displayed and switch the two rendering buffers, preparing next
 278  * frame.
 279  *****************************************************************************/
 280 static void vout_Render( vout_thread_t *p_vout, picture_t *p_pic )
 281 {
 282     picture_t *p_outpic = NULL;
 283     int i_col, i_row, i_vout, i_plane;
 284     int pi_left_skip[VOUT_MAX_PLANES], pi_top_skip[VOUT_MAX_PLANES];
 285
 286     i_vout = 0;
 287
 288     for( i_plane = 0 ; i_plane < p_pic->i_planes ; i_plane++ )
 289     {
 290         pi_top_skip[i_plane] = 0;
 291     }
 292
 293     for( i_row = 0; i_row < p_vout->p_sys->i_row; i_row++ )
 294     {
 295         for( i_plane = 0 ; i_plane < p_pic->i_planes ; i_plane++ )
 296         {
 297             pi_left_skip[i_plane] = 0;
 298         }
 299
 300         for( i_col = 0; i_col < p_vout->p_sys->i_col; i_col++ )
 301         {
 302             while( ( p_outpic =
 303                 vout_CreatePicture( p_vout->p_sys->pp_vout[ i_vout ].p_vout,
 304                                     0, 0, 0 )
 305                    ) == NULL )
 306             {
 307                 if( p_vout->b_die || p_vout->b_error )
 308                 {
 309                     vout_DestroyPicture(
 310                         p_vout->p_sys->pp_vout[ i_vout ].p_vout, p_outpic );
 311                     return;
 312                 }
 313
 314                 msleep( VOUT_OUTMEM_SLEEP );
 315             }
 316
 317             vout_DatePicture( p_vout->p_sys->pp_vout[ i_vout ].p_vout,
 318                               p_outpic, p_pic->date );
 319             vout_LinkPicture( p_vout->p_sys->pp_vout[ i_vout ].p_vout,
 320                               p_outpic );
 321
 322             for( i_plane = 0 ; i_plane < p_pic->i_planes ; i_plane++ )
 323             {
 324                 u8 *p_in, *p_in_end, *p_out;
 325                 int i_in_pitch = p_pic->p[i_plane].i_pitch;
 326                 int i_out_pitch = p_outpic->p[i_plane].i_pitch;
 327
 328                 p_in = p_pic->p[i_plane].p_pixels
 329                         + pi_top_skip[i_plane] + pi_left_skip[i_plane];
 330
 331                 p_in_end = p_in + p_outpic->p[i_plane].i_lines
 332                                    * p_pic->p[i_plane].i_pitch;
 333
 334                 p_out = p_outpic->p[i_plane].p_pixels;
 335
 336                 while( p_in < p_in_end )
 337                 {
 338                     FAST_MEMCPY( p_out, p_in, i_out_pitch );
 339                     p_in += i_in_pitch;
 340                     p_out += i_out_pitch;
 341                 }
 342
 343                 pi_left_skip[i_plane] += p_outpic->p[i_plane].i_pitch;
 344             }
 345
 346             vout_UnlinkPicture( p_vout->p_sys->pp_vout[ i_vout ].p_vout,
 347                                 p_outpic );
 348             vout_DisplayPicture( p_vout->p_sys->pp_vout[ i_vout ].p_vout,
 349                                  p_outpic );
 350
 351             i_vout++;
 352         }
 353
 354         for( i_plane = 0 ; i_plane < p_pic->i_planes ; i_plane++ )
 355         {
 356             pi_top_skip[i_plane] += p_outpic->p[i_plane].i_lines
 357                                      * p_pic->p[i_plane].i_pitch;
 358         }
 359     }
 360 }
 361
 362 /*****************************************************************************
 363  * vout_Display: displays previously rendered output
 364  *****************************************************************************
 365  * This function send the currently rendered image to Invert image, waits
 366  * until it is displayed and switch the two rendering buffers, preparing next
 367  * frame.
 368  *****************************************************************************/
 369 static void vout_Display( vout_thread_t *p_vout, picture_t *p_pic )
 370 {
 371     ;
 372 }
 373
 374 static void RemoveAllVout( vout_thread_t *p_vout )
 375 {
 376     while( p_vout->p_sys->i_vout )
 377     {
 378          --p_vout->p_sys->i_vout;
 379          vout_DestroyThread(
 380              p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].p_vout, NULL );
 381     }
 382 }
 383