1 /*****************************************************************************
2 * vout_aa.c: Aa video output display method for testing purposes
3 *****************************************************************************
4 * Copyright (C) 2002 VideoLAN
5 * $Id: aa.c,v 1.1 2002/08/04 17:23:43 sam Exp $
7 * Authors: Sigmund Augdal <sigmunau@idi.ntnu.no>
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() */
37 /*****************************************************************************
39 *****************************************************************************/
40 static int Create ( vlc_object_t * );
41 static void Destroy ( vlc_object_t * );
43 static int Init ( vout_thread_t * );
44 static void End ( vout_thread_t * );
45 static int Manage ( vout_thread_t * );
46 static void Render ( vout_thread_t *, picture_t * );
47 static void Display ( vout_thread_t *, picture_t * );
49 static void SetPalette ( vout_thread_t *, u16 *, u16 *, u16 * );
51 /*****************************************************************************
53 *****************************************************************************/
55 set_description( _("ASCII-art video output module") );
56 set_capability( "video output", 10 );
57 add_shortcut( "aalib" );
58 set_callbacks( Create, Destroy );
61 /*****************************************************************************
62 * vout_sys_t: aa video output method descriptor
63 *****************************************************************************
64 * This structure is part of the video output thread descriptor.
65 * It describes the aa specific properties of an output thread.
66 *****************************************************************************/
69 struct aa_context* aa_context;
71 int i_width; /* width of main window */
72 int i_height; /* height of main window */
75 /*****************************************************************************
76 * Create: allocates aa video thread output method
77 *****************************************************************************
78 * This function allocates and initializes a aa vout method.
79 *****************************************************************************/
80 static int Create( vlc_object_t *p_this )
82 vout_thread_t *p_vout = (vout_thread_t *)p_this;
84 /* Allocate structure */
85 p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
86 if( p_vout->p_sys == NULL )
88 msg_Err( p_vout, "out of memory" );
92 /* Don't parse any options, but take $AAOPTS into account */
93 aa_parseoptions( NULL, NULL, NULL, NULL );
95 if (!(p_vout->p_sys->aa_context = aa_autoinit(&aa_defparams)))
97 msg_Err( p_vout, "cannot initialize aalib" );
101 p_vout->pf_init = Init;
102 p_vout->pf_end = End;
103 p_vout->pf_manage = Manage;
104 p_vout->pf_render = Render;
105 p_vout->pf_display = Display;
107 p_vout->p_sys->i_width = aa_imgwidth(p_vout->p_sys->aa_context);
108 p_vout->p_sys->i_height = aa_imgheight(p_vout->p_sys->aa_context);
109 aa_autoinitkbd( p_vout->p_sys->aa_context, 0 );
110 aa_autoinitmouse( p_vout->p_sys->aa_context, AA_MOUSEPRESSMASK );
111 aa_hidemouse( p_vout->p_sys->aa_context );
115 /*****************************************************************************
116 * Init: initialize aa video thread output method
117 *****************************************************************************/
118 static int Init( vout_thread_t *p_vout )
121 picture_t *p_pic = NULL;
123 I_OUTPUTPICTURES = 0;
125 p_vout->output.i_chroma = VLC_FOURCC('R','G','B','2');
126 p_vout->output.i_width = p_vout->p_sys->i_width;
127 p_vout->output.i_height = p_vout->p_sys->i_height;
128 p_vout->output.i_aspect = p_vout->p_sys->i_width
129 * VOUT_ASPECT_FACTOR / p_vout->p_sys->i_height;
130 p_vout->output.pf_setpalette = SetPalette;
132 /* Find an empty picture slot */
133 for( i_index = 0 ; i_index < VOUT_MAX_PICTURES ; i_index++ )
135 if( p_vout->p_picture[ i_index ].i_status == FREE_PICTURE )
137 p_pic = p_vout->p_picture + i_index;
147 /* Allocate the picture */
148 p_pic->p->p_pixels = aa_image( p_vout->p_sys->aa_context );
149 p_pic->p->i_lines = p_vout->p_sys->i_height;
150 p_pic->p->i_pitch = p_vout->p_sys->i_width;
151 p_pic->p->i_pixel_pitch = 1;
152 p_pic->p->i_visible_pitch = p_vout->p_sys->i_width;
155 p_pic->i_status = DESTROYED_PICTURE;
156 p_pic->i_type = DIRECT_PICTURE;
158 PP_OUTPUTPICTURE[ I_OUTPUTPICTURES ] = p_pic;
164 /*****************************************************************************
165 * End: terminate aa video thread output method
166 *****************************************************************************/
167 static void End( vout_thread_t *p_vout )
172 /*****************************************************************************
173 * Destroy: destroy aa video thread output method
174 *****************************************************************************
175 * Terminate an output method created by AaCreateOutputMethod
176 *****************************************************************************/
177 static void Destroy( vlc_object_t *p_this )
179 vout_thread_t *p_vout = (vout_thread_t *)p_this;
181 aa_close( p_vout->p_sys->aa_context );
182 free( p_vout->p_sys );
185 /*****************************************************************************
186 * Manage: handle aa events
187 *****************************************************************************
188 * This function should be called regularly by video output thread. It manages
189 * console events. It returns a non null value on error.
190 *****************************************************************************/
191 static int Manage( vout_thread_t *p_vout )
194 event = aa_getevent( p_vout->p_sys->aa_context, 0 );
198 aa_getmouse( p_vout->p_sys->aa_context, &x, &y, &b );
199 if ( b & AA_BUTTON3 )
201 intf_thread_t *p_intf;
202 p_intf = vlc_object_find( p_vout, VLC_OBJECT_INTF, FIND_ANYWHERE );
205 p_intf->b_menu_change = 1;
206 vlc_object_release( p_intf );
211 p_vout->i_changes |= VOUT_SIZE_CHANGE;
212 aa_resize( p_vout->p_sys->aa_context );
213 p_vout->p_sys->i_width = aa_imgwidth( p_vout->p_sys->aa_context );
214 p_vout->p_sys->i_height = aa_imgheight( p_vout->p_sys->aa_context );
222 /*****************************************************************************
223 * Render: render previously calculated output
224 *****************************************************************************/
225 static void Render( vout_thread_t *p_vout, picture_t *p_pic )
227 aa_fastrender( p_vout->p_sys->aa_context, 0, 0,
228 aa_imgwidth( p_vout->p_sys->aa_context ),
229 aa_imgheight( p_vout->p_sys->aa_context ) );
232 /*****************************************************************************
233 * Display: displays previously rendered output
234 *****************************************************************************/
235 static void Display( vout_thread_t *p_vout, picture_t *p_pic )
237 /* No need to do anything, the fake direct buffers stay as they are */
238 int i_width, i_height, i_x, i_y;
240 vout_PlacePicture( p_vout, p_vout->p_sys->i_width, p_vout->p_sys->i_height,
241 &i_x, &i_y, &i_width, &i_height );
243 aa_flush(p_vout->p_sys->aa_context);
246 /*****************************************************************************
247 * SetPalette: set the 8bpp palette
248 *****************************************************************************/
249 static void SetPalette( vout_thread_t *p_vout, u16 *red, u16 *green, u16 *blue )
253 /* Fill colors with color information */
254 for( i = 0; i < 256; i++ )
256 aa_setpalette( p_vout->p_sys->palette, 256 -i,
257 red[ i ], green[ i ], blue[ i ] );