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 1.5 2002/01/02 14:37:42 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_Display   ( vout_thread_t *, struct picture_s * );
  94
  95 static void RemoveAllVout  ( vout_thread_t *p_vout );
  96
  97 /*****************************************************************************
  98  * Functions exported as capabilities. They are declared as static so that
  99  * we don't pollute the namespace too much.
 100  *****************************************************************************/
 101 static void vout_getfunctions( function_list_t * p_function_list )
 102 {
 103     p_function_list->pf_probe = vout_Probe;
 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_display    = vout_Display;
 110     p_function_list->functions.vout.pf_setpalette = NULL;
 111 }
 112
 113 /*****************************************************************************
 114  * intf_Probe: return a score
 115  *****************************************************************************/
 116 static int vout_Probe( probedata_t *p_data )
 117 {
 118     return( 0 );
 119 }
 120
 121 /*****************************************************************************
 122  * vout_Create: allocates Wall video thread output method
 123  *****************************************************************************
 124  * This function allocates and initializes a Wall vout method.
 125  *****************************************************************************/
 126 static int vout_Create( vout_thread_t *p_vout )
 127 {
 128     /* Allocate structure */
 129     p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
 130     if( p_vout->p_sys == NULL )
 131     {
 132         intf_ErrMsg("error: %s", strerror(ENOMEM) );
 133         return( 1 );
 134     }
 135
 136     p_vout->p_sys->i_col = 3;
 137     p_vout->p_sys->i_row = 2;
 138
 139     p_vout->p_sys->pp_vout = malloc( p_vout->p_sys->i_row *
 140                                      p_vout->p_sys->i_col *
 141                                      sizeof(struct vout_list_s) );
 142     if( p_vout->p_sys->pp_vout == NULL )
 143     {
 144         intf_ErrMsg("error: %s", strerror(ENOMEM) );
 145         free( p_vout->p_sys );
 146         return( 1 );
 147     }
 148
 149
 150     return( 0 );
 151 }
 152
 153 /*****************************************************************************
 154  * vout_Init: initialize Wall video thread output method
 155  *****************************************************************************/
 156 static int vout_Init( vout_thread_t *p_vout )
 157 {
 158     int i_index, i_row, i_col, i_width, i_height;
 159     char *psz_filter;
 160     picture_t *p_pic;
 161
 162     I_OUTPUTPICTURES = 0;
 163
 164     /* Initialize the output structure */
 165     switch( p_vout->render.i_chroma )
 166     {
 167         case FOURCC_I420:
 168         case FOURCC_IYUV:
 169         case FOURCC_YV12:
 170         case FOURCC_I422:
 171         case FOURCC_I444:
 172             p_vout->output.i_chroma = p_vout->render.i_chroma;
 173             p_vout->output.i_width  = p_vout->render.i_width;
 174             p_vout->output.i_height = p_vout->render.i_height;
 175             p_vout->output.i_aspect = p_vout->render.i_aspect;
 176             break;
 177
 178         default:
 179             return( 0 ); /* unknown chroma */
 180             break;
 181     }
 182
 183     /* Try to open the real video output */
 184     psz_filter = main_GetPszVariable( VOUT_FILTER_VAR, NULL );
 185     main_PutPszVariable( VOUT_FILTER_VAR, "" );
 186
 187     intf_WarnMsg( 1, "filter: spawning the real video outputs" );
 188
 189     p_vout->p_sys->i_vout = 0;
 190
 191     for( i_row = 0; i_row < p_vout->p_sys->i_row; i_row++ )
 192     {
 193         for( i_col = 0; i_col < p_vout->p_sys->i_col; i_col++ )
 194         {
 195             if( i_col + 1 < p_vout->p_sys->i_col )
 196             {
 197                 i_width = ( p_vout->render.i_width
 198                              / p_vout->p_sys->i_col ) & ~0xf;
 199             }
 200             else
 201             {
 202                 i_width = p_vout->render.i_width
 203                            - ( ( p_vout->render.i_width
 204                                   / p_vout->p_sys->i_col ) & ~0xf ) * i_col;
 205             }
 206
 207             if( i_row + 1 < p_vout->p_sys->i_row )
 208             {
 209                 i_height = p_vout->render.i_height / p_vout->p_sys->i_row;
 210             }
 211             else
 212             {
 213                 i_height = p_vout->render.i_height
 214                             - p_vout->render.i_height
 215                                / p_vout->p_sys->i_row * i_row;
 216             }
 217
 218             p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].p_vout =
 219                 vout_CreateThread( NULL, i_width, i_height,
 220                                    p_vout->render.i_chroma,
 221                                    p_vout->render.i_aspect
 222                                     * p_vout->render.i_height / i_height
 223                                     * i_width / p_vout->render.i_width );
 224             if( p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].p_vout == NULL )
 225             {
 226                 intf_ErrMsg( "vout error: failed to get %ix%i vout threads",
 227                              p_vout->p_sys->i_col, p_vout->p_sys->i_row );
 228                 RemoveAllVout( p_vout );
 229                 return 0;
 230             }
 231
 232             p_vout->p_sys->i_vout++;
 233         }
 234     }
 235
 236     main_PutPszVariable( VOUT_FILTER_VAR, psz_filter );
 237
 238     ALLOCATE_DIRECTBUFFERS( VOUT_MAX_PICTURES );
 239
 240     return( 0 );
 241 }
 242
 243 /*****************************************************************************
 244  * vout_End: terminate Wall video thread output method
 245  *****************************************************************************/
 246 static void vout_End( vout_thread_t *p_vout )
 247 {
 248     int i_index;
 249
 250     /* Free the fake output buffers we allocated */
 251     for( i_index = I_OUTPUTPICTURES ; i_index ; )
 252     {
 253         i_index--;
 254         free( PP_OUTPUTPICTURE[ i_index ]->planes[ 0 ].p_data );
 255     }
 256 }
 257
 258 /*****************************************************************************
 259  * vout_Destroy: destroy Wall video thread output method
 260  *****************************************************************************
 261  * Terminate an output method created by WallCreateOutputMethod
 262  *****************************************************************************/
 263 static void vout_Destroy( vout_thread_t *p_vout )
 264 {
 265     RemoveAllVout( p_vout );
 266
 267     free( p_vout->p_sys->pp_vout );
 268     free( p_vout->p_sys );
 269 }
 270
 271 /*****************************************************************************
 272  * vout_Manage: handle Wall events
 273  *****************************************************************************
 274  * This function should be called regularly by video output thread. It manages
 275  * console events. It returns a non null value on error.
 276  *****************************************************************************/
 277 static int vout_Manage( vout_thread_t *p_vout )
 278 {
 279     return( 0 );
 280 }
 281
 282 /*****************************************************************************
 283  * vout_Display: displays previously rendered output
 284  *****************************************************************************
 285  * This function send the currently rendered image to Wall image, waits
 286  * until it is displayed and switch the two rendering buffers, preparing next
 287  * frame.
 288  *****************************************************************************/
 289 static void vout_Display( vout_thread_t *p_vout, picture_t *p_pic )
 290 {
 291     picture_t *p_outpic;
 292     int i_col, i_row, i_vout, i_index;
 293     mtime_t i_date = mdate() + 50000;
 294
 295     i_vout = 0;
 296
 297     for( i_row = 0; i_row < p_vout->p_sys->i_row; i_row++ )
 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, i_date );
 318             vout_LinkPicture( p_vout->p_sys->pp_vout[ i_vout ].p_vout,
 319                               p_outpic );
 320
 321             for( i_index = 0 ; i_index < p_pic->i_planes ; i_index++ )
 322             {
 323                 yuv_data_t *p_in, *p_in_end, *p_out;
 324                 int i_out_bytes, i_offset;
 325
 326                 /* XXX: beware, it's p_outpic ! */
 327                 i_out_bytes = p_outpic->planes[ i_index ].i_line_bytes;
 328
 329                 if( i_col + 1 < p_vout->p_sys->i_col )
 330                 {
 331                     i_offset = i_out_bytes * i_col;
 332                 }
 333                 else
 334                 {
 335                     i_offset = p_pic->planes[ i_index ].i_line_bytes
 336                                 - i_out_bytes;
 337                 }
 338
 339                 p_in = p_pic->planes[ i_index ].p_data
 340                         + p_pic->planes[ i_index ].i_bytes
 341                            / p_vout->p_sys->i_row * i_row
 342                         + i_offset;
 343
 344                 if( i_row + 1 < p_vout->p_sys->i_row )
 345                 {
 346                     p_in_end = p_in
 347                                 + p_pic->planes[ i_index ].i_bytes
 348                                    / p_vout->p_sys->i_row;
 349                 }
 350                 else
 351                 {
 352                     p_in_end = p_pic->planes[ i_index ].p_data
 353                                 + p_pic->planes[ i_index ].i_bytes
 354                                 + i_offset;
 355                 }
 356
 357                 p_out = p_outpic->planes[ i_index ].p_data;
 358
 359                 while( p_in < p_in_end )
 360                 {
 361                     FAST_MEMCPY( p_out, p_in, i_out_bytes );
 362                     p_in += p_pic->planes[ i_index ].i_line_bytes;
 363                     p_out += i_out_bytes;
 364                 }
 365             }
 366
 367             vout_UnlinkPicture( p_vout->p_sys->pp_vout[ i_vout ].p_vout,
 368                                 p_outpic );
 369             vout_DisplayPicture( p_vout->p_sys->pp_vout[ i_vout ].p_vout,
 370                                  p_outpic );
 371
 372             i_vout++;
 373         }
 374     }
 375 }
 376
 377 static void RemoveAllVout( vout_thread_t *p_vout )
 378 {
 379     while( p_vout->p_sys->i_vout )
 380     {
 381          --p_vout->p_sys->i_vout;
 382          vout_DestroyThread(
 383              p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].p_vout, NULL );
 384     }
 385 }
 386