1 /*****************************************************************************
2 * vout_aa.c: Aa video output display method for testing purposes
3 *****************************************************************************
4 * Copyright (C) 2002 the VideoLAN team
7 * Authors: Sigmund Augdal Helberg <dnumgis@videolan.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 */
36 #include <vlc_plugin.h>
38 #include <vlc_interface.h>
40 /*****************************************************************************
42 *****************************************************************************/
43 static int Create ( vlc_object_t * );
44 static void Destroy ( vlc_object_t * );
46 static int Init ( vout_thread_t * );
47 static void End ( vout_thread_t * );
48 static int Manage ( vout_thread_t * );
49 static void Render ( vout_thread_t *, picture_t * );
50 static void Display ( vout_thread_t *, picture_t * );
52 static void SetPalette ( vout_thread_t *, uint16_t *, uint16_t *, uint16_t * );
54 /*****************************************************************************
56 *****************************************************************************/
58 set_shortname( _("ASCII Art"));
59 set_category( CAT_VIDEO );
60 set_subcategory( SUBCAT_VIDEO_VOUT );
61 set_description( _("ASCII-art video output") );
62 set_capability( "video output", 10 );
63 add_shortcut( "aalib" );
64 set_callbacks( Create, Destroy );
67 /*****************************************************************************
68 * vout_sys_t: aa video output method descriptor
69 *****************************************************************************
70 * This structure is part of the video output thread descriptor.
71 * It describes the aa specific properties of an output thread.
72 *****************************************************************************/
75 struct aa_context* aa_context;
77 int i_width; /* width of main window */
78 int i_height; /* height of main window */
81 /*****************************************************************************
82 * Create: allocates aa video thread output method
83 *****************************************************************************
84 * This function allocates and initializes a aa vout method.
85 *****************************************************************************/
86 static int Create( vlc_object_t *p_this )
88 vout_thread_t *p_vout = (vout_thread_t *)p_this;
90 /* Allocate structure */
91 p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
92 if( p_vout->p_sys == NULL )
94 msg_Err( p_vout, "out of memory" );
98 /* Don't parse any options, but take $AAOPTS into account */
99 aa_parseoptions( NULL, NULL, NULL, NULL );
101 if (!(p_vout->p_sys->aa_context = aa_autoinit(&aa_defparams)))
103 msg_Err( p_vout, "cannot initialize aalib" );
107 p_vout->pf_init = Init;
108 p_vout->pf_end = End;
109 p_vout->pf_manage = Manage;
110 p_vout->pf_render = Render;
111 p_vout->pf_display = Display;
113 p_vout->p_sys->i_width = aa_imgwidth(p_vout->p_sys->aa_context);
114 p_vout->p_sys->i_height = aa_imgheight(p_vout->p_sys->aa_context);
115 aa_autoinitkbd( p_vout->p_sys->aa_context, 0 );
116 aa_autoinitmouse( p_vout->p_sys->aa_context, AA_MOUSEPRESSMASK );
117 aa_hidemouse( p_vout->p_sys->aa_context );
121 /*****************************************************************************
122 * Init: initialize aa video thread output method
123 *****************************************************************************/
124 static int Init( vout_thread_t *p_vout )
127 picture_t *p_pic = NULL;
129 I_OUTPUTPICTURES = 0;
131 p_vout->output.i_chroma = VLC_FOURCC('R','G','B','2');
132 p_vout->output.i_width = p_vout->p_sys->i_width;
133 p_vout->output.i_height = p_vout->p_sys->i_height;
134 p_vout->output.i_aspect = p_vout->p_sys->i_width
135 * VOUT_ASPECT_FACTOR / p_vout->p_sys->i_height;
136 p_vout->output.pf_setpalette = SetPalette;
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->p_pixels = aa_image( p_vout->p_sys->aa_context );
155 p_pic->p->i_lines = p_vout->p_sys->i_height;
156 p_pic->p->i_visible_lines = p_vout->p_sys->i_height;
157 p_pic->p->i_pitch = p_vout->p_sys->i_width;
158 p_pic->p->i_pixel_pitch = 1;
159 p_pic->p->i_visible_pitch = p_vout->p_sys->i_width;
162 p_pic->i_status = DESTROYED_PICTURE;
163 p_pic->i_type = DIRECT_PICTURE;
165 PP_OUTPUTPICTURE[ I_OUTPUTPICTURES ] = p_pic;
171 /*****************************************************************************
172 * End: terminate aa video thread output method
173 *****************************************************************************/
174 static void End( vout_thread_t *p_vout )
179 /*****************************************************************************
180 * Destroy: destroy aa video thread output method
181 *****************************************************************************
182 * Terminate an output method created by AaCreateOutputMethod
183 *****************************************************************************/
184 static void Destroy( vlc_object_t *p_this )
186 vout_thread_t *p_vout = (vout_thread_t *)p_this;
188 aa_close( p_vout->p_sys->aa_context );
189 free( p_vout->p_sys );
192 /*****************************************************************************
193 * Manage: handle aa events
194 *****************************************************************************
195 * This function should be called regularly by video output thread. It manages
196 * console events. It returns a non null value on error.
197 *****************************************************************************/
198 static int Manage( vout_thread_t *p_vout )
201 event = aa_getevent( p_vout->p_sys->aa_context, 0 );
205 aa_getmouse( p_vout->p_sys->aa_context, &x, &y, &b );
206 if ( b & AA_BUTTON3 )
208 intf_thread_t *p_intf;
209 p_intf = vlc_object_find( p_vout, VLC_OBJECT_INTF, FIND_ANYWHERE );
212 p_intf->b_menu_change = 1;
213 vlc_object_release( p_intf );
218 p_vout->i_changes |= VOUT_SIZE_CHANGE;
219 aa_resize( p_vout->p_sys->aa_context );
220 p_vout->p_sys->i_width = aa_imgwidth( p_vout->p_sys->aa_context );
221 p_vout->p_sys->i_height = aa_imgheight( p_vout->p_sys->aa_context );
229 /*****************************************************************************
230 * Render: render previously calculated output
231 *****************************************************************************/
232 static void Render( vout_thread_t *p_vout, picture_t *p_pic )
234 aa_fastrender( p_vout->p_sys->aa_context, 0, 0,
235 aa_imgwidth( p_vout->p_sys->aa_context ),
236 aa_imgheight( p_vout->p_sys->aa_context ) );
239 /*****************************************************************************
240 * Display: displays previously rendered output
241 *****************************************************************************/
242 static void Display( vout_thread_t *p_vout, picture_t *p_pic )
244 /* No need to do anything, the fake direct buffers stay as they are */
245 int i_width, i_height, i_x, i_y;
247 vout_PlacePicture( p_vout, p_vout->p_sys->i_width, p_vout->p_sys->i_height,
248 &i_x, &i_y, &i_width, &i_height );
250 aa_flush(p_vout->p_sys->aa_context);
253 /*****************************************************************************
254 * SetPalette: set the 8bpp palette
255 *****************************************************************************/
256 static void SetPalette( vout_thread_t *p_vout,
257 uint16_t *red, uint16_t *green, uint16_t *blue )
261 /* Fill colors with color information */
262 for( i = 0; i < 256; i++ )
264 aa_setpalette( p_vout->p_sys->palette, 256 -i,
265 red[ i ], green[ i ], blue[ i ] );