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 the VideoLAN team
   5  * $Id$
   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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, 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_shortname( "Caca" );
  55     set_category( CAT_VIDEO );
  56     set_subcategory( SUBCAT_VIDEO_VOUT );
  57     set_description( _("Color ASCII art video output") );
  58     set_capability( "video output", 12 );
  59     set_callbacks( Create, Destroy );
  60 vlc_module_end();
  61
  62 /*****************************************************************************
  63  * vout_sys_t: libcaca video output method descriptor
  64  *****************************************************************************
  65  * This structure is part of the video output thread descriptor.
  66  * It describes the libcaca specific properties of an output thread.
  67  *****************************************************************************/
  68 struct vout_sys_t
  69 {
  70 #ifdef CACA_API_VERSION_1
  71     cucul_canvas_t *p_cv;
  72     caca_display_t *p_dp;
  73     cucul_dither_t *p_dither;
  74 #else
  75     struct caca_bitmap *p_bitmap;
  76 #endif
  77 };
  78
  79 /*****************************************************************************
  80  * Create: allocates libcaca video output thread
  81  *****************************************************************************
  82  * This function initializes libcaca vout method.
  83  *****************************************************************************/
  84 static int Create( vlc_object_t *p_this )
  85 {
  86     vout_thread_t *p_vout = (vout_thread_t *)p_this;
  87
  88 #if defined( WIN32 ) && !defined( UNDER_CE )
  89     if( AllocConsole() )
  90     {
  91         CONSOLE_SCREEN_BUFFER_INFO csbiInfo;
  92         SMALL_RECT rect;
  93         COORD coord;
  94
  95         HANDLE hstdout =
  96             CreateConsoleScreenBuffer( GENERIC_READ | GENERIC_WRITE,
  97                                        FILE_SHARE_READ | FILE_SHARE_WRITE,
  98                                        NULL, CONSOLE_TEXTMODE_BUFFER, NULL );
  99         if( !hstdout || hstdout == INVALID_HANDLE_VALUE )
 100         {
 101             msg_Err( p_vout, "cannot create screen buffer" );
 102             FreeConsole();
 103             return VLC_EGENERIC;
 104         }
 105
 106         if( !SetConsoleActiveScreenBuffer( hstdout) )
 107         {
 108             msg_Err( p_vout, "cannot set active screen buffer" );
 109             FreeConsole();
 110             return VLC_EGENERIC;
 111         }
 112
 113         coord = GetLargestConsoleWindowSize( hstdout );
 114         msg_Dbg( p_vout, "SetConsoleWindowInfo: %ix%i", coord.X, coord.Y );
 115
 116         /* Force size for now */
 117         coord.X = 100;
 118         coord.Y = 40;
 119
 120         if( !SetConsoleScreenBufferSize( hstdout, coord ) )
 121             msg_Warn( p_vout, "SetConsoleScreenBufferSize %i %i",
 122                       coord.X, coord.Y );
 123
 124         /* Get the current screen buffer size and window position. */
 125         if( GetConsoleScreenBufferInfo( hstdout, &csbiInfo ) )
 126         {
 127             rect.Top = 0; rect.Left = 0;
 128             rect.Right = csbiInfo.dwMaximumWindowSize.X - 1;
 129             rect.Bottom = csbiInfo.dwMaximumWindowSize.Y - 1;
 130             if( !SetConsoleWindowInfo( hstdout, TRUE, &rect ) )
 131                 msg_Dbg( p_vout, "SetConsoleWindowInfo failed: %ix%i",
 132                          rect.Right, rect.Bottom );
 133         }
 134     }
 135     else
 136     {
 137         msg_Err( p_vout, "cannot create console" );
 138         return VLC_EGENERIC;
 139     }
 140
 141 #endif
 142
 143     /* Allocate structure */
 144     p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
 145     if( p_vout->p_sys == NULL )
 146     {
 147         msg_Err( p_vout, "out of memory" );
 148         return VLC_ENOMEM;
 149     }
 150
 151 #ifdef CACA_API_VERSION_1
 152     p_vout->p_sys->p_cv = cucul_create_canvas(0, 0);
 153     if( !p_vout->p_sys->p_cv )
 154     {
 155         msg_Err( p_vout, "cannot initialize libcucul" );
 156         free( p_vout->p_sys );
 157         return VLC_EGENERIC;
 158     }
 159
 160     p_vout->p_sys->p_dp = caca_create_display( p_vout->p_sys->p_cv );
 161     if( !p_vout->p_sys->p_dp )
 162     {
 163         msg_Err( p_vout, "cannot initialize libcaca" );
 164         cucul_free_canvas( p_vout->p_sys->p_cv );
 165         free( p_vout->p_sys );
 166         return VLC_EGENERIC;
 167     }
 168
 169     caca_set_display_title( p_vout->p_sys->p_dp,
 170                             VOUT_TITLE " - Colour AsCii Art (caca)" );
 171 #else
 172     if( caca_init() )
 173     {
 174         msg_Err( p_vout, "cannot initialize libcaca" );
 175         free( p_vout->p_sys );
 176         return VLC_EGENERIC;
 177     }
 178
 179     caca_set_window_title( VOUT_TITLE " - Colour AsCii Art (caca)" );
 180 #endif
 181
 182     p_vout->pf_init = Init;
 183     p_vout->pf_end = End;
 184     p_vout->pf_manage = Manage;
 185     p_vout->pf_render = Render;
 186     p_vout->pf_display = Display;
 187
 188     return VLC_SUCCESS;
 189 }
 190
 191 /*****************************************************************************
 192  * Init: initialize libcaca video output thread
 193  *****************************************************************************/
 194 static int Init( vout_thread_t *p_vout )
 195 {
 196     int i_index;
 197     picture_t *p_pic = NULL;
 198
 199     I_OUTPUTPICTURES = 0;
 200
 201     p_vout->output.i_chroma = VLC_FOURCC('R','V','3','2');
 202     p_vout->output.i_width = p_vout->render.i_width;
 203     p_vout->output.i_height = p_vout->render.i_height;
 204     p_vout->output.i_aspect = p_vout->render.i_aspect;
 205
 206     p_vout->output.i_rmask = 0x00ff0000;
 207     p_vout->output.i_gmask = 0x0000ff00;
 208     p_vout->output.i_bmask = 0x000000ff;
 209
 210     /* Create the libcaca bitmap */
 211 #ifdef CACA_API_VERSION_1
 212     p_vout->p_sys->p_dither =
 213         cucul_create_dither
 214 #else
 215     p_vout->p_sys->p_bitmap =
 216         caca_create_bitmap
 217 #endif
 218                        ( 32, p_vout->output.i_width, p_vout->output.i_height,
 219                          4 * ((p_vout->output.i_width + 15) & ~15),
 220                          p_vout->output.i_rmask, p_vout->output.i_gmask,
 221                          p_vout->output.i_bmask, 0x00000000 );
 222
 223 #ifdef CACA_API_VERSION_1
 224     if( !p_vout->p_sys->p_dither )
 225 #else
 226     if( !p_vout->p_sys->p_bitmap )
 227 #endif
 228     {
 229         msg_Err( p_vout, "could not create libcaca bitmap" );
 230         return VLC_EGENERIC;
 231     }
 232
 233     /* Find an empty picture slot */
 234     for( i_index = 0 ; i_index < VOUT_MAX_PICTURES ; i_index++ )
 235     {
 236         if( p_vout->p_picture[ i_index ].i_status == FREE_PICTURE )
 237         {
 238             p_pic = p_vout->p_picture + i_index;
 239             break;
 240         }
 241     }
 242
 243     if( p_pic == NULL )
 244     {
 245         return VLC_EGENERIC;
 246     }
 247
 248     /* Allocate the picture */
 249     p_pic->p->i_lines = p_vout->output.i_height;
 250     p_pic->p->i_visible_lines = p_vout->output.i_height;
 251     p_pic->p->i_pitch = 4 * ((p_vout->output.i_width + 15) & ~15);
 252     p_pic->p->i_pixel_pitch = 4;
 253     p_pic->p->i_visible_pitch = 4 * p_vout->output.i_width;
 254     p_pic->i_planes = 1;
 255     p_pic->p->p_pixels = malloc( p_pic->p->i_pitch * p_pic->p->i_lines );
 256
 257     p_pic->i_status = DESTROYED_PICTURE;
 258     p_pic->i_type   = DIRECT_PICTURE;
 259
 260     PP_OUTPUTPICTURE[ I_OUTPUTPICTURES ] = p_pic;
 261     I_OUTPUTPICTURES++;
 262
 263     return VLC_SUCCESS;
 264 }
 265
 266 /*****************************************************************************
 267  * End: terminate libcaca video output thread
 268  *****************************************************************************/
 269 static void End( vout_thread_t *p_vout )
 270 {
 271 #ifdef CACA_API_VERSION_1
 272     cucul_free_dither( p_vout->p_sys->p_dither );
 273 #else
 274     caca_free_bitmap( p_vout->p_sys->p_bitmap );
 275 #endif
 276 }
 277
 278 /*****************************************************************************
 279  * Destroy: destroy libcaca video output thread
 280  *****************************************************************************
 281  * Terminate an output method created by AaCreateOutputMethod
 282  *****************************************************************************/
 283 static void Destroy( vlc_object_t *p_this )
 284 {
 285     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 286
 287 #ifdef CACA_API_VERSION_1
 288     caca_free_display( p_vout->p_sys->p_dp );
 289     cucul_free_canvas( p_vout->p_sys->p_cv );
 290 #else
 291     caca_end();
 292 #endif
 293
 294 #if defined( WIN32 ) && !defined( UNDER_CE )
 295     FreeConsole();
 296 #endif
 297
 298     free( p_vout->p_sys );
 299 }
 300
 301 /*****************************************************************************
 302  * Manage: handle libcaca events
 303  *****************************************************************************
 304  * This function should be called regularly by video output thread. It manages
 305  * console events. It returns a non null value on error.
 306  *****************************************************************************/
 307 static int Manage( vout_thread_t *p_vout )
 308 {
 309 #ifdef CACA_API_VERSION_1
 310     struct caca_event ev;
 311 #else
 312     int event;
 313 #endif
 314     vlc_value_t val;
 315
 316 #ifdef CACA_API_VERSION_1
 317     while(( caca_get_event(p_vout->p_sys->p_dp,
 318                            CACA_EVENT_KEY_PRESS | CACA_EVENT_RESIZE, &ev, 0) ))
 319 #else
 320     while(( event = caca_get_event(CACA_EVENT_KEY_PRESS | CACA_EVENT_RESIZE) ))
 321 #endif
 322     {
 323         /* Acknowledge the resize */
 324 #ifdef CACA_API_VERSION_1
 325         if( ev.type == CACA_EVENT_RESIZE )
 326         {
 327             caca_refresh_display( p_vout->p_sys->p_dp );
 328             continue;
 329         }
 330 #else
 331         if( event == CACA_EVENT_RESIZE )
 332         {
 333             caca_refresh();
 334             continue;
 335         }
 336 #endif
 337
 338 #ifdef CACA_API_VERSION_1
 339         switch( ev.data.key.ch )
 340 #else
 341         switch( event & 0x00ffffff )
 342 #endif
 343         {
 344         case 'q':
 345             val.i_int = KEY_MODIFIER_CTRL | 'q';
 346             break;
 347         case ' ':
 348             val.i_int = KEY_SPACE;
 349             break;
 350         default:
 351             continue;
 352         }
 353
 354         var_Set( p_vout->p_vlc, "key-pressed", val );
 355     }
 356
 357     return VLC_SUCCESS;
 358 }
 359
 360 /*****************************************************************************
 361  * Render: render previously calculated output
 362  *****************************************************************************/
 363 static void Render( vout_thread_t *p_vout, picture_t *p_pic )
 364 {
 365 #ifdef CACA_API_VERSION_1
 366     cucul_set_color( p_vout->p_sys->p_cv,
 367                      CUCUL_COLOR_DEFAULT, CUCUL_COLOR_BLACK );
 368     cucul_clear_canvas( p_vout->p_sys->p_cv );
 369     cucul_dither_bitmap( p_vout->p_sys->p_cv, 0, 0,
 370                          cucul_get_canvas_width( p_vout->p_sys->p_cv ) - 1,
 371                          cucul_get_canvas_height( p_vout->p_sys->p_cv ) - 1,
 372                          p_vout->p_sys->p_dither, p_pic->p->p_pixels );
 373 #else
 374     caca_clear();
 375     caca_draw_bitmap( 0, 0, caca_get_width() - 1, caca_get_height() - 1,
 376                       p_vout->p_sys->p_bitmap, p_pic->p->p_pixels );
 377 #endif
 378 }
 379
 380 /*****************************************************************************
 381  * Display: displays previously rendered output
 382  *****************************************************************************/
 383 static void Display( vout_thread_t *p_vout, picture_t *p_pic )
 384 {
 385 #ifdef CACA_API_VERSION_1
 386     caca_refresh_display( p_vout->p_sys->p_dp );
 387 #else
 388     caca_refresh();
 389 #endif
 390 }
 391