1 /*****************************************************************************
2 * caca.c: Color ASCII Art video output plugin using libcaca
3 *****************************************************************************
4 * Copyright (C) 2003, 2004 the VideoLAN team
7 * Authors: Sam Hocevar <sam@zoy.org>
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.
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.
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 *****************************************************************************/
24 /*****************************************************************************
26 *****************************************************************************/
27 #include <errno.h> /* ENOMEM */
28 #include <stdlib.h> /* free() */
29 #include <string.h> /* strerror() */
33 #ifndef CACA_API_VERSION_1
34 /* Upward compatibility macros */
35 typedef char cucul_canvas_t;
36 typedef struct caca_bitmap cucul_dither_t;
37 typedef char caca_display_t;
38 # define CUCUL_COLOR_DEFAULT CACA_COLOR_LIGHTGRAY
39 # define CUCUL_COLOR_BLACK CACA_COLOR_BLACK
40 # define cucul_clear_canvas(x) caca_clear()
41 # define cucul_create_canvas(x,y) "" /* kinda hacky */
42 # define cucul_create_dither caca_create_bitmap
43 # define cucul_dither_bitmap(x,y,z,t,u,v,w) caca_draw_bitmap(y,z,t,u,v,w)
44 # define cucul_free_dither caca_free_bitmap
45 # define cucul_free_canvas(x)
46 # define cucul_get_canvas_width(x) caca_get_width()
47 # define cucul_get_canvas_height(x) caca_get_height()
48 # define cucul_set_color(x,y,z) caca_set_color(y,z)
49 # define caca_create_display(x) (caca_init() ? NULL : "") /* hacky, too */
50 # define caca_free_display(x) caca_end()
51 # define caca_get_event(x,y,z,t) *(z) = caca_get_event(y)
52 # define caca_refresh_display(x) caca_refresh()
53 # define caca_set_display_title(x,y) caca_set_window_title(y)
61 /*****************************************************************************
63 *****************************************************************************/
64 static int Create ( vlc_object_t * );
65 static void Destroy ( vlc_object_t * );
67 static int Init ( vout_thread_t * );
68 static void End ( vout_thread_t * );
69 static int Manage ( vout_thread_t * );
70 static void Render ( vout_thread_t *, picture_t * );
71 static void Display ( vout_thread_t *, picture_t * );
73 /*****************************************************************************
75 *****************************************************************************/
77 set_shortname( "Caca" );
78 set_category( CAT_VIDEO );
79 set_subcategory( SUBCAT_VIDEO_VOUT );
80 set_description( _("Color ASCII art video output") );
81 set_capability( "video output", 12 );
82 set_callbacks( Create, Destroy );
85 /*****************************************************************************
86 * vout_sys_t: libcaca video output method descriptor
87 *****************************************************************************
88 * This structure is part of the video output thread descriptor.
89 * It describes the libcaca specific properties of an output thread.
90 *****************************************************************************/
95 cucul_dither_t *p_dither;
98 /*****************************************************************************
99 * Create: allocates libcaca video output thread
100 *****************************************************************************
101 * This function initializes libcaca vout method.
102 *****************************************************************************/
103 static int Create( vlc_object_t *p_this )
105 vout_thread_t *p_vout = (vout_thread_t *)p_this;
107 #if defined( WIN32 ) && !defined( UNDER_CE )
108 CONSOLE_SCREEN_BUFFER_INFO csbiInfo;
113 if( !AllocConsole() )
115 msg_Err( p_vout, "cannot create console" );
120 CreateConsoleScreenBuffer( GENERIC_READ | GENERIC_WRITE,
121 FILE_SHARE_READ | FILE_SHARE_WRITE,
122 NULL, CONSOLE_TEXTMODE_BUFFER, NULL );
123 if( !hstdout || hstdout == INVALID_HANDLE_VALUE )
125 msg_Err( p_vout, "cannot create screen buffer" );
130 if( !SetConsoleActiveScreenBuffer( hstdout) )
132 msg_Err( p_vout, "cannot set active screen buffer" );
137 coord = GetLargestConsoleWindowSize( hstdout );
138 msg_Dbg( p_vout, "SetConsoleWindowInfo: %ix%i", coord.X, coord.Y );
140 /* Force size for now */
144 if( !SetConsoleScreenBufferSize( hstdout, coord ) )
145 msg_Warn( p_vout, "SetConsoleScreenBufferSize %i %i",
148 /* Get the current screen buffer size and window position. */
149 if( GetConsoleScreenBufferInfo( hstdout, &csbiInfo ) )
151 rect.Top = 0; rect.Left = 0;
152 rect.Right = csbiInfo.dwMaximumWindowSize.X - 1;
153 rect.Bottom = csbiInfo.dwMaximumWindowSize.Y - 1;
154 if( !SetConsoleWindowInfo( hstdout, TRUE, &rect ) )
155 msg_Dbg( p_vout, "SetConsoleWindowInfo failed: %ix%i",
156 rect.Right, rect.Bottom );
160 /* Allocate structure */
161 p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
162 if( p_vout->p_sys == NULL )
164 msg_Err( p_vout, "out of memory" );
168 p_vout->p_sys->p_cv = cucul_create_canvas(0, 0);
169 if( !p_vout->p_sys->p_cv )
171 msg_Err( p_vout, "cannot initialize libcucul" );
172 free( p_vout->p_sys );
176 p_vout->p_sys->p_dp = caca_create_display( p_vout->p_sys->p_cv );
177 if( !p_vout->p_sys->p_dp )
179 msg_Err( p_vout, "cannot initialize libcaca" );
180 cucul_free_canvas( p_vout->p_sys->p_cv );
181 free( p_vout->p_sys );
185 caca_set_display_title( p_vout->p_sys->p_dp,
186 VOUT_TITLE " - Colour AsCii Art (caca)" );
188 p_vout->pf_init = Init;
189 p_vout->pf_end = End;
190 p_vout->pf_manage = Manage;
191 p_vout->pf_render = Render;
192 p_vout->pf_display = Display;
197 /*****************************************************************************
198 * Init: initialize libcaca video output thread
199 *****************************************************************************/
200 static int Init( vout_thread_t *p_vout )
203 picture_t *p_pic = NULL;
205 I_OUTPUTPICTURES = 0;
207 p_vout->output.i_chroma = VLC_FOURCC('R','V','3','2');
208 p_vout->output.i_width = p_vout->render.i_width;
209 p_vout->output.i_height = p_vout->render.i_height;
210 p_vout->output.i_aspect = p_vout->render.i_aspect;
212 p_vout->output.i_rmask = 0x00ff0000;
213 p_vout->output.i_gmask = 0x0000ff00;
214 p_vout->output.i_bmask = 0x000000ff;
216 /* Create the libcaca dither object */
217 p_vout->p_sys->p_dither = cucul_create_dither
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 );
223 if( !p_vout->p_sys->p_dither )
225 msg_Err( p_vout, "could not create libcaca dither object" );
229 /* Find an empty picture slot */
230 for( i_index = 0 ; i_index < VOUT_MAX_PICTURES ; i_index++ )
232 if( p_vout->p_picture[ i_index ].i_status == FREE_PICTURE )
234 p_pic = p_vout->p_picture + i_index;
244 /* Allocate the picture */
245 p_pic->p->i_lines = p_vout->output.i_height;
246 p_pic->p->i_visible_lines = p_vout->output.i_height;
247 p_pic->p->i_pitch = 4 * ((p_vout->output.i_width + 15) & ~15);
248 p_pic->p->i_pixel_pitch = 4;
249 p_pic->p->i_visible_pitch = 4 * p_vout->output.i_width;
251 p_pic->p->p_pixels = malloc( p_pic->p->i_pitch * p_pic->p->i_lines );
253 p_pic->i_status = DESTROYED_PICTURE;
254 p_pic->i_type = DIRECT_PICTURE;
256 PP_OUTPUTPICTURE[ I_OUTPUTPICTURES ] = p_pic;
262 /*****************************************************************************
263 * End: terminate libcaca video output thread
264 *****************************************************************************/
265 static void End( vout_thread_t *p_vout )
267 cucul_free_dither( p_vout->p_sys->p_dither );
270 /*****************************************************************************
271 * Destroy: destroy libcaca video output thread
272 *****************************************************************************
273 * Terminate an output method created by AaCreateOutputMethod
274 *****************************************************************************/
275 static void Destroy( vlc_object_t *p_this )
277 vout_thread_t *p_vout = (vout_thread_t *)p_this;
279 caca_free_display( p_vout->p_sys->p_dp );
280 cucul_free_canvas( p_vout->p_sys->p_cv );
282 #if defined( WIN32 ) && !defined( UNDER_CE )
286 free( p_vout->p_sys );
289 /*****************************************************************************
290 * Manage: handle libcaca events
291 *****************************************************************************
292 * This function should be called regularly by video output thread. It manages
293 * console events. It returns a non null value on error.
294 *****************************************************************************/
295 static int Manage( vout_thread_t *p_vout )
297 #ifdef CACA_API_VERSION_1
298 struct caca_event ev;
304 while( caca_get_event(p_vout->p_sys->p_dp,
305 CACA_EVENT_KEY_PRESS | CACA_EVENT_RESIZE, &ev, 0) )
307 /* Acknowledge the resize */
308 #ifdef CACA_API_VERSION_1
309 if( ev.type == CACA_EVENT_RESIZE )
311 if( ev == CACA_EVENT_RESIZE )
314 caca_refresh_display( p_vout->p_sys->p_dp );
318 #ifdef CACA_API_VERSION_1
319 switch( ev.data.key.ch )
321 switch( ev & 0x00ffffff )
325 val.i_int = KEY_MODIFIER_CTRL | 'q';
328 val.i_int = KEY_SPACE;
334 var_Set( p_vout->p_libvlc, "key-pressed", val );
340 /*****************************************************************************
341 * Render: render previously calculated output
342 *****************************************************************************/
343 static void Render( vout_thread_t *p_vout, picture_t *p_pic )
345 cucul_set_color( p_vout->p_sys->p_cv,
346 CUCUL_COLOR_DEFAULT, CUCUL_COLOR_BLACK );
347 cucul_clear_canvas( p_vout->p_sys->p_cv );
348 cucul_dither_bitmap( p_vout->p_sys->p_cv, 0, 0,
349 cucul_get_canvas_width( p_vout->p_sys->p_cv ) - 1,
350 cucul_get_canvas_height( p_vout->p_sys->p_cv ) - 1,
351 p_vout->p_sys->p_dither, p_pic->p->p_pixels );
354 /*****************************************************************************
355 * Display: displays previously rendered output
356 *****************************************************************************/
357 static void Display( vout_thread_t *p_vout, picture_t *p_pic )
359 caca_refresh_display( p_vout->p_sys->p_dp );