git.sesse.net Git - vlc/blob - modules/video_output/caca.c

   1 /*****************************************************************************
   2  * caca.c: Color ASCII Art video output plugin using libcaca
   3  *****************************************************************************
   4  * Copyright (C) 2003, 2004 VideoLAN
   5  * $Id: caca.c,v 1.7 2004/01/12 16:16:41 gbazin Exp $
   6  *
   7  * Authors: Sam 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>                                                 /* ENOMEM */
  28 #include <stdlib.h>                                                /* free() */
  29 #include <string.h>                                            /* strerror() */
  30
  31 #include <caca.h>
  32
  33 #include <vlc/vlc.h>
  34 #include <vlc/vout.h>
  35 #include <vlc/intf.h>
  36 #include <vlc_keys.h>
  37
  38 /*****************************************************************************
  39  * Local prototypes
  40  *****************************************************************************/
  41 static int  Create    ( vlc_object_t * );
  42 static void Destroy   ( vlc_object_t * );
  43
  44 static int  Init      ( vout_thread_t * );
  45 static void End       ( vout_thread_t * );
  46 static int  Manage    ( vout_thread_t * );
  47 static void Render    ( vout_thread_t *, picture_t * );
  48 static void Display   ( vout_thread_t *, picture_t * );
  49
  50 /*****************************************************************************
  51  * Module descriptor
  52  *****************************************************************************/
  53 vlc_module_begin();
  54     set_description( _("colour ASCII art video output") );
  55     set_capability( "video output", 12 );
  56     set_callbacks( Create, Destroy );
  57 vlc_module_end();
  58
  59 /*****************************************************************************
  60  * vout_sys_t: libcaca video output method descriptor
  61  *****************************************************************************
  62  * This structure is part of the video output thread descriptor.
  63  * It describes the libcaca specific properties of an output thread.
  64  *****************************************************************************/
  65 struct vout_sys_t
  66 {
  67     struct caca_bitmap *p_bitmap;
  68 };
  69
  70 /*****************************************************************************
  71  * Create: allocates libcaca video output thread
  72  *****************************************************************************
  73  * This function initializes libcaca vout method.
  74  *****************************************************************************/
  75 static int Create( vlc_object_t *p_this )
  76 {
  77     vout_thread_t *p_vout = (vout_thread_t *)p_this;
  78
  79 #if defined( WIN32 ) && !defined( UNDER_CE )
  80     if( AllocConsole() )
  81     {
  82         CONSOLE_SCREEN_BUFFER_INFO csbiInfo;
  83         SMALL_RECT rect;
  84         COORD coord;
  85
  86         HANDLE hstdout =
  87             CreateConsoleScreenBuffer( GENERIC_READ | GENERIC_WRITE,
  88                                        FILE_SHARE_READ | FILE_SHARE_WRITE,
  89                                        NULL, CONSOLE_TEXTMODE_BUFFER, NULL );
  90         if( !hstdout || hstdout == INVALID_HANDLE_VALUE )
  91         {
  92             msg_Err( p_vout, "cannot create screen buffer" );
  93             FreeConsole();
  94             return VLC_EGENERIC;
  95         }
  96
  97         if( !SetConsoleActiveScreenBuffer( hstdout) )
  98         {
  99             msg_Err( p_vout, "cannot set active screen buffer" );
 100             FreeConsole();
 101             return VLC_EGENERIC;
 102         }
 103
 104         coord = GetLargestConsoleWindowSize( hstdout );
 105         msg_Dbg( p_vout, "SetConsoleWindowInfo: %ix%i", coord.X, coord.Y );
 106
 107         /* Force size for now */
 108         coord.X = 100;
 109         coord.Y = 40;
 110
 111         if( !SetConsoleScreenBufferSize( hstdout, coord ) )
 112             msg_Warn( p_vout, "SetConsoleScreenBufferSize %i %i",
 113                       coord.X, coord.Y );
 114
 115         /* Get the current screen buffer size and window position. */
 116         if( GetConsoleScreenBufferInfo( hstdout, &csbiInfo ) )
 117         {
 118             rect.Top = 0; rect.Left = 0;
 119             rect.Right = csbiInfo.dwMaximumWindowSize.X - 1;
 120             rect.Bottom = csbiInfo.dwMaximumWindowSize.Y - 1;
 121             if( !SetConsoleWindowInfo( hstdout, TRUE, &rect ) )
 122                 msg_Dbg( p_vout, "SetConsoleWindowInfo failed: %ix%i",
 123                          rect.Right, rect.Bottom );
 124         }
 125     }
 126     else
 127     {
 128         msg_Err( p_vout, "cannot create console" );
 129         return VLC_EGENERIC;
 130     }
 131
 132     SetConsoleTitle( VOUT_TITLE " - Colour AsCii Art (caca)" );
 133 #endif
 134
 135     /* Allocate structure */
 136     p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
 137     if( p_vout->p_sys == NULL )
 138     {
 139         msg_Err( p_vout, "out of memory" );
 140         return VLC_ENOMEM;
 141     }
 142
 143     if( caca_init() )
 144     {
 145         msg_Err( p_vout, "cannot initialize libcaca" );
 146         free( p_vout->p_sys );
 147         return VLC_EGENERIC;
 148     }
 149
 150     p_vout->pf_init = Init;
 151     p_vout->pf_end = End;
 152     p_vout->pf_manage = Manage;
 153     p_vout->pf_render = Render;
 154     p_vout->pf_display = Display;
 155
 156     return VLC_SUCCESS;
 157 }
 158
 159 /*****************************************************************************
 160  * Init: initialize libcaca video output thread
 161  *****************************************************************************/
 162 static int Init( vout_thread_t *p_vout )
 163 {
 164     int i_index;
 165     picture_t *p_pic = NULL;
 166
 167     I_OUTPUTPICTURES = 0;
 168
 169     p_vout->output.i_chroma = VLC_FOURCC('R','V','3','2');
 170     p_vout->output.i_width = p_vout->render.i_width;
 171     p_vout->output.i_height = p_vout->render.i_height;
 172     p_vout->output.i_aspect = p_vout->render.i_aspect;
 173
 174     p_vout->output.i_rmask = 0x00ff0000;
 175     p_vout->output.i_gmask = 0x0000ff00;
 176     p_vout->output.i_bmask = 0x000000ff;
 177
 178     /* Create the libcaca bitmap */
 179     p_vout->p_sys->p_bitmap =
 180         caca_create_bitmap( 32,
 181                             p_vout->output.i_width,
 182                             p_vout->output.i_height,
 183                             4 * ((p_vout->output.i_width + 15) & ~15),
 184                             p_vout->output.i_rmask,
 185                             p_vout->output.i_gmask,
 186                             p_vout->output.i_bmask,
 187                             0x00000000 );
 188     if( !p_vout->p_sys->p_bitmap )
 189     {
 190         msg_Err( p_vout, "could not create libcaca bitmap" );
 191         return VLC_EGENERIC;
 192     }
 193
 194     /* Find an empty picture slot */
 195     for( i_index = 0 ; i_index < VOUT_MAX_PICTURES ; i_index++ )
 196     {
 197         if( p_vout->p_picture[ i_index ].i_status == FREE_PICTURE )
 198         {
 199             p_pic = p_vout->p_picture + i_index;
 200             break;
 201         }
 202     }
 203
 204     if( p_pic == NULL )
 205     {
 206         return VLC_EGENERIC;
 207     }
 208
 209     /* Allocate the picture */
 210     p_pic->p->i_lines = p_vout->output.i_height;
 211     p_pic->p->i_pitch = 4 * ((p_vout->output.i_width + 15) & ~15);
 212     p_pic->p->i_pixel_pitch = 4;
 213     p_pic->p->i_visible_pitch = 4 * p_vout->output.i_width;
 214     p_pic->i_planes = 1;
 215     p_pic->p->p_pixels = malloc( p_pic->p->i_pitch * p_pic->p->i_lines );
 216
 217     p_pic->i_status = DESTROYED_PICTURE;
 218     p_pic->i_type   = DIRECT_PICTURE;
 219
 220     PP_OUTPUTPICTURE[ I_OUTPUTPICTURES ] = p_pic;
 221     I_OUTPUTPICTURES++;
 222
 223     return VLC_SUCCESS;
 224 }
 225
 226 /*****************************************************************************
 227  * End: terminate libcaca video output thread
 228  *****************************************************************************/
 229 static void End( vout_thread_t *p_vout )
 230 {
 231     caca_free_bitmap( p_vout->p_sys->p_bitmap );
 232 }
 233
 234 /*****************************************************************************
 235  * Destroy: destroy libcaca video output thread
 236  *****************************************************************************
 237  * Terminate an output method created by AaCreateOutputMethod
 238  *****************************************************************************/
 239 static void Destroy( vlc_object_t *p_this )
 240 {
 241     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 242
 243     caca_end();
 244
 245 #if defined( WIN32 ) && !defined( UNDER_CE )
 246     FreeConsole();
 247 #endif
 248
 249     free( p_vout->p_sys );
 250 }
 251
 252 /*****************************************************************************
 253  * Manage: handle libcaca events
 254  *****************************************************************************
 255  * This function should be called regularly by video output thread. It manages
 256  * console events. It returns a non null value on error.
 257  *****************************************************************************/
 258 static int Manage( vout_thread_t *p_vout )
 259 {
 260     int event;
 261     vlc_value_t val;
 262
 263     while(( event = caca_get_event(CACA_EVENT_KEY_PRESS) ))
 264     {
 265         switch( event & 0x00ffffff )
 266         {
 267         case 'q':
 268             val.i_int = KEY_MODIFIER_CTRL | 'q';
 269             break;
 270         case ' ':
 271             val.i_int = KEY_SPACE;
 272             break;
 273         default:
 274             continue;
 275         }
 276
 277         var_Set( p_vout->p_vlc, "key-pressed", val );
 278     }
 279
 280     return VLC_SUCCESS;
 281 }
 282
 283 /*****************************************************************************
 284  * Render: render previously calculated output
 285  *****************************************************************************/
 286 static void Render( vout_thread_t *p_vout, picture_t *p_pic )
 287 {
 288     caca_clear();
 289     caca_draw_bitmap( 0, 0, caca_get_width() - 1, caca_get_height() - 1,
 290                       p_vout->p_sys->p_bitmap, p_pic->p->p_pixels );
 291 }
 292
 293 /*****************************************************************************
 294  * Display: displays previously rendered output
 295  *****************************************************************************/
 296 static void Display( vout_thread_t *p_vout, picture_t *p_pic )
 297 {
 298     caca_refresh();
 299 }
 300