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 1.3 2001/12/30 07:09:55 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_thread_s **pp_vout;
  76
  77 } vout_sys_t;
  78
  79 /*****************************************************************************
  80  * Local prototypes
  81  *****************************************************************************/
  82 static int  vout_Probe     ( probedata_t *p_data );
  83 static int  vout_Create    ( vout_thread_t * );
  84 static int  vout_Init      ( vout_thread_t * );
  85 static void vout_End       ( vout_thread_t * );
  86 static void vout_Destroy   ( vout_thread_t * );
  87 static int  vout_Manage    ( vout_thread_t * );
  88 static void vout_Display   ( vout_thread_t *, struct picture_s * );
  89
  90 static void RemoveAllVout  ( vout_thread_t *p_vout );
  91
  92 /*****************************************************************************
  93  * Functions exported as capabilities. They are declared as static so that
  94  * we don't pollute the namespace too much.
  95  *****************************************************************************/
  96 static void vout_getfunctions( function_list_t * p_function_list )
  97 {
  98     p_function_list->pf_probe = vout_Probe;
  99     p_function_list->functions.vout.pf_create     = vout_Create;
 100     p_function_list->functions.vout.pf_init       = vout_Init;
 101     p_function_list->functions.vout.pf_end        = vout_End;
 102     p_function_list->functions.vout.pf_destroy    = vout_Destroy;
 103     p_function_list->functions.vout.pf_manage     = vout_Manage;
 104     p_function_list->functions.vout.pf_display    = vout_Display;
 105     p_function_list->functions.vout.pf_setpalette = NULL;
 106 }
 107
 108 /*****************************************************************************
 109  * intf_Probe: return a score
 110  *****************************************************************************/
 111 static int vout_Probe( probedata_t *p_data )
 112 {
 113     return( 0 );
 114 }
 115
 116 /*****************************************************************************
 117  * vout_Create: allocates Wall video thread output method
 118  *****************************************************************************
 119  * This function allocates and initializes a Wall vout method.
 120  *****************************************************************************/
 121 static int vout_Create( vout_thread_t *p_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     p_vout->p_sys->i_col = 2;
 132     p_vout->p_sys->i_row = 3;
 133
 134     p_vout->p_sys->pp_vout = malloc( p_vout->p_sys->i_row *
 135                                      p_vout->p_sys->i_col *
 136                                      sizeof(vout_thread_t*) );
 137     if( p_vout->p_sys->pp_vout == NULL )
 138     {
 139         intf_ErrMsg("error: %s", strerror(ENOMEM) );
 140         free( p_vout->p_sys );
 141         return( 1 );
 142     }
 143
 144
 145     return( 0 );
 146 }
 147
 148 /*****************************************************************************
 149  * vout_Init: initialize Wall video thread output method
 150  *****************************************************************************/
 151 static int vout_Init( vout_thread_t *p_vout )
 152 {
 153     int i_index;
 154     char *psz_filter;
 155     picture_t *p_pic;
 156
 157     I_OUTPUTPICTURES = 0;
 158
 159     /* Initialize the output structure */
 160     switch( p_vout->render.i_chroma )
 161     {
 162         case YUV_420_PICTURE:
 163             p_vout->output.i_chroma = p_vout->render.i_chroma;
 164             p_vout->output.i_width  = p_vout->render.i_width;
 165             p_vout->output.i_height = p_vout->render.i_height;
 166             p_vout->output.i_aspect = p_vout->render.i_aspect;
 167             break;
 168
 169         default:
 170             return( 0 ); /* unknown chroma */
 171             break;
 172     }
 173
 174     /* Try to open the real video output */
 175     psz_filter = main_GetPszVariable( VOUT_FILTER_VAR, NULL );
 176     main_PutPszVariable( VOUT_FILTER_VAR, "" );
 177
 178     intf_WarnMsg( 1, "filter: spawning the real video outputs" );
 179
 180     for( p_vout->p_sys->i_vout = 0;
 181          p_vout->p_sys->i_vout < p_vout->p_sys->i_row * p_vout->p_sys->i_col;
 182          p_vout->p_sys->i_vout++ )
 183     {
 184         p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ] =
 185             vout_CreateThread( NULL,
 186                 p_vout->render.i_width / p_vout->p_sys->i_col,
 187                 p_vout->render.i_height / p_vout->p_sys->i_row,
 188                 p_vout->render.i_chroma,
 189                 p_vout->render.i_aspect * p_vout->p_sys->i_row
 190                                         / p_vout->p_sys->i_col );
 191         if( p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ] == NULL )
 192         {
 193              intf_ErrMsg( "vout error: failed to get %ix%i vout threads",
 194                           p_vout->p_sys->i_col, p_vout->p_sys->i_row );
 195              RemoveAllVout( p_vout );
 196              return 0;
 197         }
 198     }
 199
 200     main_PutPszVariable( VOUT_FILTER_VAR, psz_filter );
 201
 202     ALLOCATE_DIRECTBUFFERS( VOUT_MAX_PICTURES );
 203
 204     return( 0 );
 205 }
 206
 207 /*****************************************************************************
 208  * vout_End: terminate Wall video thread output method
 209  *****************************************************************************/
 210 static void vout_End( vout_thread_t *p_vout )
 211 {
 212     int i_index;
 213
 214     /* Free the fake output buffers we allocated */
 215     for( i_index = I_OUTPUTPICTURES ; i_index ; )
 216     {
 217         i_index--;
 218         free( PP_OUTPUTPICTURE[ i_index ]->planes[ 0 ].p_data );
 219     }
 220 }
 221
 222 /*****************************************************************************
 223  * vout_Destroy: destroy Wall video thread output method
 224  *****************************************************************************
 225  * Terminate an output method created by WallCreateOutputMethod
 226  *****************************************************************************/
 227 static void vout_Destroy( vout_thread_t *p_vout )
 228 {
 229     RemoveAllVout( p_vout );
 230
 231     free( p_vout->p_sys->pp_vout );
 232     free( p_vout->p_sys );
 233 }
 234
 235 /*****************************************************************************
 236  * vout_Manage: handle Wall events
 237  *****************************************************************************
 238  * This function should be called regularly by video output thread. It manages
 239  * console events. It returns a non null value on error.
 240  *****************************************************************************/
 241 static int vout_Manage( vout_thread_t *p_vout )
 242 {
 243     return( 0 );
 244 }
 245
 246 /*****************************************************************************
 247  * vout_Display: displays previously rendered output
 248  *****************************************************************************
 249  * This function send the currently rendered image to Wall image, waits
 250  * until it is displayed and switch the two rendering buffers, preparing next
 251  * frame.
 252  *****************************************************************************/
 253 static void vout_Display( vout_thread_t *p_vout, picture_t *p_pic )
 254 {
 255     picture_t *p_outpic;
 256     int i_col, i_row, i_vout, i_index;
 257     mtime_t i_date = mdate() + 50000;
 258
 259     i_vout = 0;
 260
 261     for( i_row = 0; i_row < p_vout->p_sys->i_row; i_row++ )
 262     {
 263         for( i_col = 0; i_col < p_vout->p_sys->i_col; i_col++ )
 264         {
 265             while( ( p_outpic =
 266                 vout_CreatePicture( p_vout->p_sys->pp_vout[ i_vout ], 0, 0, 0 )
 267                    ) == NULL )
 268             {
 269                 if( p_vout->b_die || p_vout->b_error )
 270                 {
 271                     vout_DestroyPicture( p_vout->p_sys->pp_vout[ i_vout ],
 272                                          p_outpic );
 273                     return;
 274                 }
 275
 276                 msleep( VOUT_OUTMEM_SLEEP );
 277             }
 278
 279             vout_DatePicture( p_vout->p_sys->pp_vout[ i_vout ],
 280                               p_outpic, i_date );
 281             vout_LinkPicture( p_vout->p_sys->pp_vout[ i_vout ],
 282                               p_outpic );
 283
 284             for( i_index = 0 ; i_index < p_pic->i_planes ; i_index++ )
 285             {
 286                 FAST_MEMCPY( p_outpic->planes[ i_index ].p_data,
 287                              p_pic->planes[ i_index ].p_data
 288                                  + p_pic->planes[ i_index ].i_bytes / 2,
 289                              p_outpic->planes[ i_index ].i_bytes );
 290             }
 291
 292             vout_UnlinkPicture( p_vout->p_sys->pp_vout[ i_vout ],
 293                                 p_outpic );
 294             vout_DisplayPicture( p_vout->p_sys->pp_vout[ i_vout ],
 295                                  p_outpic );
 296
 297             i_vout++;
 298         }
 299     }
 300 }
 301
 302 static void RemoveAllVout( vout_thread_t *p_vout )
 303 {
 304     while( p_vout->p_sys->i_vout )
 305     {
 306          --p_vout->p_sys->i_vout;
 307          vout_DestroyThread( p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ],
 308                              NULL );
 309     }
 310 }
 311