1 /*****************************************************************************
2 * caca.c: Color ASCII Art video output plugin using libcaca
3 *****************************************************************************
4 * Copyright (C) 2003, 2004 VideoLAN
5 * $Id: caca.c,v 1.9 2004/01/26 16:45:02 zorglub Exp $
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., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
22 *****************************************************************************/
24 /*****************************************************************************
26 *****************************************************************************/
27 #include <errno.h> /* ENOMEM */
28 #include <stdlib.h> /* free() */
29 #include <string.h> /* strerror() */
38 /*****************************************************************************
40 *****************************************************************************/
41 static int Create ( vlc_object_t * );
42 static void Destroy ( vlc_object_t * );
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 * );
50 /*****************************************************************************
52 *****************************************************************************/
54 set_description( _("colour ASCII art video output") );
55 set_capability( "video output", 12 );
56 set_callbacks( Create, Destroy );
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 *****************************************************************************/
67 struct caca_bitmap *p_bitmap;
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 )
77 vout_thread_t *p_vout = (vout_thread_t *)p_this;
79 #if defined( WIN32 ) && !defined( UNDER_CE )
82 CONSOLE_SCREEN_BUFFER_INFO csbiInfo;
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 )
92 msg_Err( p_vout, "cannot create screen buffer" );
97 if( !SetConsoleActiveScreenBuffer( hstdout) )
99 msg_Err( p_vout, "cannot set active screen buffer" );
104 coord = GetLargestConsoleWindowSize( hstdout );
105 msg_Dbg( p_vout, "SetConsoleWindowInfo: %ix%i", coord.X, coord.Y );
107 /* Force size for now */
111 if( !SetConsoleScreenBufferSize( hstdout, coord ) )
112 msg_Warn( p_vout, "SetConsoleScreenBufferSize %i %i",
115 /* Get the current screen buffer size and window position. */
116 if( GetConsoleScreenBufferInfo( hstdout, &csbiInfo ) )
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 );
128 msg_Err( p_vout, "cannot create console" );
134 /* Allocate structure */
135 p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
136 if( p_vout->p_sys == NULL )
138 msg_Err( p_vout, "out of memory" );
144 msg_Err( p_vout, "cannot initialize libcaca" );
145 free( p_vout->p_sys );
149 caca_set_window_title( VOUT_TITLE " - Colour AsCii Art (caca)" );
151 p_vout->pf_init = Init;
152 p_vout->pf_end = End;
153 p_vout->pf_manage = Manage;
154 p_vout->pf_render = Render;
155 p_vout->pf_display = Display;
160 /*****************************************************************************
161 * Init: initialize libcaca video output thread
162 *****************************************************************************/
163 static int Init( vout_thread_t *p_vout )
166 picture_t *p_pic = NULL;
168 I_OUTPUTPICTURES = 0;
170 p_vout->output.i_chroma = VLC_FOURCC('R','V','3','2');
171 p_vout->output.i_width = p_vout->render.i_width;
172 p_vout->output.i_height = p_vout->render.i_height;
173 p_vout->output.i_aspect = p_vout->render.i_aspect;
175 p_vout->output.i_rmask = 0x00ff0000;
176 p_vout->output.i_gmask = 0x0000ff00;
177 p_vout->output.i_bmask = 0x000000ff;
179 /* Create the libcaca bitmap */
180 p_vout->p_sys->p_bitmap =
181 caca_create_bitmap( 32,
182 p_vout->output.i_width,
183 p_vout->output.i_height,
184 4 * ((p_vout->output.i_width + 15) & ~15),
185 p_vout->output.i_rmask,
186 p_vout->output.i_gmask,
187 p_vout->output.i_bmask,
189 if( !p_vout->p_sys->p_bitmap )
191 msg_Err( p_vout, "could not create libcaca bitmap" );
195 /* Find an empty picture slot */
196 for( i_index = 0 ; i_index < VOUT_MAX_PICTURES ; i_index++ )
198 if( p_vout->p_picture[ i_index ].i_status == FREE_PICTURE )
200 p_pic = p_vout->p_picture + i_index;
210 /* Allocate the picture */
211 p_pic->p->i_lines = p_vout->output.i_height;
212 p_pic->p->i_pitch = 4 * ((p_vout->output.i_width + 15) & ~15);
213 p_pic->p->i_pixel_pitch = 4;
214 p_pic->p->i_visible_pitch = 4 * p_vout->output.i_width;
216 p_pic->p->p_pixels = malloc( p_pic->p->i_pitch * p_pic->p->i_lines );
218 p_pic->i_status = DESTROYED_PICTURE;
219 p_pic->i_type = DIRECT_PICTURE;
221 PP_OUTPUTPICTURE[ I_OUTPUTPICTURES ] = p_pic;
227 /*****************************************************************************
228 * End: terminate libcaca video output thread
229 *****************************************************************************/
230 static void End( vout_thread_t *p_vout )
232 caca_free_bitmap( p_vout->p_sys->p_bitmap );
235 /*****************************************************************************
236 * Destroy: destroy libcaca video output thread
237 *****************************************************************************
238 * Terminate an output method created by AaCreateOutputMethod
239 *****************************************************************************/
240 static void Destroy( vlc_object_t *p_this )
242 vout_thread_t *p_vout = (vout_thread_t *)p_this;
246 #if defined( WIN32 ) && !defined( UNDER_CE )
250 free( p_vout->p_sys );
253 /*****************************************************************************
254 * Manage: handle libcaca events
255 *****************************************************************************
256 * This function should be called regularly by video output thread. It manages
257 * console events. It returns a non null value on error.
258 *****************************************************************************/
259 static int Manage( vout_thread_t *p_vout )
264 while(( event = caca_get_event(CACA_EVENT_KEY_PRESS | CACA_EVENT_RESIZE) ))
266 if( event == CACA_EVENT_RESIZE )
268 /* Acknowledge the resize */
273 switch( event & 0x00ffffff )
276 val.i_int = KEY_MODIFIER_CTRL | 'q';
279 val.i_int = KEY_SPACE;
285 var_Set( p_vout->p_vlc, "key-pressed", val );
291 /*****************************************************************************
292 * Render: render previously calculated output
293 *****************************************************************************/
294 static void Render( vout_thread_t *p_vout, picture_t *p_pic )
297 caca_draw_bitmap( 0, 0, caca_get_width() - 1, caca_get_height() - 1,
298 p_vout->p_sys->p_bitmap, p_pic->p->p_pixels );
301 /*****************************************************************************
302 * Display: displays previously rendered output
303 *****************************************************************************/
304 static void Display( vout_thread_t *p_vout, picture_t *p_pic )