1 /*****************************************************************************
2 * caca.c: Color ASCII Art video output plugin using libcaca
3 *****************************************************************************
4 * Copyright (C) 2003, 2004 VideoLAN
5 * $Id: caca.c,v 1.6 2004/01/08 19:22:10 sam 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 /* Allocate structure */
80 p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
81 if( p_vout->p_sys == NULL )
83 msg_Err( p_vout, "out of memory" );
89 msg_Err( p_vout, "cannot initialize libcaca" );
90 free( p_vout->p_sys );
94 p_vout->pf_init = Init;
96 p_vout->pf_manage = Manage;
97 p_vout->pf_render = Render;
98 p_vout->pf_display = Display;
103 /*****************************************************************************
104 * Init: initialize libcaca video output thread
105 *****************************************************************************/
106 static int Init( vout_thread_t *p_vout )
109 picture_t *p_pic = NULL;
111 I_OUTPUTPICTURES = 0;
113 p_vout->output.i_chroma = VLC_FOURCC('R','V','3','2');
114 p_vout->output.i_width = p_vout->render.i_width;
115 p_vout->output.i_height = p_vout->render.i_height;
116 p_vout->output.i_aspect = p_vout->render.i_aspect;
118 p_vout->output.i_rmask = 0x00ff0000;
119 p_vout->output.i_gmask = 0x0000ff00;
120 p_vout->output.i_bmask = 0x000000ff;
122 /* Create the libcaca bitmap */
123 p_vout->p_sys->p_bitmap =
124 caca_create_bitmap( 32,
125 p_vout->output.i_width,
126 p_vout->output.i_height,
127 4 * ((p_vout->output.i_width + 15) & ~15),
128 p_vout->output.i_rmask,
129 p_vout->output.i_gmask,
130 p_vout->output.i_bmask,
132 if( !p_vout->p_sys->p_bitmap )
134 msg_Err( p_vout, "could not create libcaca bitmap" );
138 /* Find an empty picture slot */
139 for( i_index = 0 ; i_index < VOUT_MAX_PICTURES ; i_index++ )
141 if( p_vout->p_picture[ i_index ].i_status == FREE_PICTURE )
143 p_pic = p_vout->p_picture + i_index;
153 /* Allocate the picture */
154 p_pic->p->i_lines = p_vout->output.i_height;
155 p_pic->p->i_pitch = 4 * ((p_vout->output.i_width + 15) & ~15);
156 p_pic->p->i_pixel_pitch = 4;
157 p_pic->p->i_visible_pitch = 4 * p_vout->output.i_width;
159 p_pic->p->p_pixels = malloc( p_pic->p->i_pitch * p_pic->p->i_lines );
161 p_pic->i_status = DESTROYED_PICTURE;
162 p_pic->i_type = DIRECT_PICTURE;
164 PP_OUTPUTPICTURE[ I_OUTPUTPICTURES ] = p_pic;
170 /*****************************************************************************
171 * End: terminate libcaca video output thread
172 *****************************************************************************/
173 static void End( vout_thread_t *p_vout )
175 caca_free_bitmap( p_vout->p_sys->p_bitmap );
178 /*****************************************************************************
179 * Destroy: destroy libcaca video output thread
180 *****************************************************************************
181 * Terminate an output method created by AaCreateOutputMethod
182 *****************************************************************************/
183 static void Destroy( vlc_object_t *p_this )
185 vout_thread_t *p_vout = (vout_thread_t *)p_this;
188 free( p_vout->p_sys );
191 /*****************************************************************************
192 * Manage: handle libcaca events
193 *****************************************************************************
194 * This function should be called regularly by video output thread. It manages
195 * console events. It returns a non null value on error.
196 *****************************************************************************/
197 static int Manage( vout_thread_t *p_vout )
202 while(( event = caca_get_event(CACA_EVENT_KEY_PRESS) ))
204 switch( event & 0x00ffffff )
207 val.i_int = KEY_MODIFIER_CTRL | 'q';
210 val.i_int = KEY_SPACE;
216 var_Set( p_vout->p_vlc, "key-pressed", val );
222 /*****************************************************************************
223 * Render: render previously calculated output
224 *****************************************************************************/
225 static void Render( vout_thread_t *p_vout, picture_t *p_pic )
228 caca_draw_bitmap( 0, 0, caca_get_width() - 1, caca_get_height() - 1,
229 p_vout->p_sys->p_bitmap, p_pic->p->p_pixels );
232 /*****************************************************************************
233 * Display: displays previously rendered output
234 *****************************************************************************/
235 static void Display( vout_thread_t *p_vout, picture_t *p_pic )