1 /*****************************************************************************
2 * vout_aa.c: Aa video output display method for testing purposes
3 *****************************************************************************
4 * Copyright (C) 2002 VideoLAN
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 *, uint16_t *, uint16_t *, uint16_t * );
51 /*****************************************************************************
53 *****************************************************************************/
55 set_category( CAT_VIDEO );
56 set_subcategory( SUBCAT_VIDEO_VOUT );
57 set_description( _("ASCII-art video output") );
58 set_capability( "video output", 10 );
59 add_shortcut( "aalib" );
60 set_callbacks( Create, Destroy );
63 /*****************************************************************************
64 * vout_sys_t: aa video output method descriptor
65 *****************************************************************************
66 * This structure is part of the video output thread descriptor.
67 * It describes the aa specific properties of an output thread.
68 *****************************************************************************/
71 struct aa_context* aa_context;
73 int i_width; /* width of main window */
74 int i_height; /* height of main window */
77 /*****************************************************************************
78 * Create: allocates aa video thread output method
79 *****************************************************************************
80 * This function allocates and initializes a aa vout method.
81 *****************************************************************************/
82 static int Create( vlc_object_t *p_this )
84 vout_thread_t *p_vout = (vout_thread_t *)p_this;
86 /* Allocate structure */
87 p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
88 if( p_vout->p_sys == NULL )
90 msg_Err( p_vout, "out of memory" );
94 /* Don't parse any options, but take $AAOPTS into account */
95 aa_parseoptions( NULL, NULL, NULL, NULL );
97 if (!(p_vout->p_sys->aa_context = aa_autoinit(&aa_defparams)))
99 msg_Err( p_vout, "cannot initialize aalib" );
103 p_vout->pf_init = Init;
104 p_vout->pf_end = End;
105 p_vout->pf_manage = Manage;
106 p_vout->pf_render = Render;
107 p_vout->pf_display = Display;
109 p_vout->p_sys->i_width = aa_imgwidth(p_vout->p_sys->aa_context);
110 p_vout->p_sys->i_height = aa_imgheight(p_vout->p_sys->aa_context);
111 aa_autoinitkbd( p_vout->p_sys->aa_context, 0 );
112 aa_autoinitmouse( p_vout->p_sys->aa_context, AA_MOUSEPRESSMASK );
113 aa_hidemouse( p_vout->p_sys->aa_context );
117 /*****************************************************************************
118 * Init: initialize aa video thread output method
119 *****************************************************************************/
120 static int Init( vout_thread_t *p_vout )
123 picture_t *p_pic = NULL;
125 I_OUTPUTPICTURES = 0;
127 p_vout->output.i_chroma = VLC_FOURCC('R','G','B','2');
128 p_vout->output.i_width = p_vout->p_sys->i_width;
129 p_vout->output.i_height = p_vout->p_sys->i_height;
130 p_vout->output.i_aspect = p_vout->p_sys->i_width
131 * VOUT_ASPECT_FACTOR / p_vout->p_sys->i_height;
132 p_vout->output.pf_setpalette = SetPalette;
134 /* Find an empty picture slot */
135 for( i_index = 0 ; i_index < VOUT_MAX_PICTURES ; i_index++ )
137 if( p_vout->p_picture[ i_index ].i_status == FREE_PICTURE )
139 p_pic = p_vout->p_picture + i_index;
149 /* Allocate the picture */
150 p_pic->p->p_pixels = aa_image( p_vout->p_sys->aa_context );
151 p_pic->p->i_lines = p_vout->p_sys->i_height;
152 p_pic->p->i_visible_lines = p_vout->p_sys->i_height;
153 p_pic->p->i_pitch = p_vout->p_sys->i_width;
154 p_pic->p->i_pixel_pitch = 1;
155 p_pic->p->i_visible_pitch = p_vout->p_sys->i_width;
158 p_pic->i_status = DESTROYED_PICTURE;
159 p_pic->i_type = DIRECT_PICTURE;
161 PP_OUTPUTPICTURE[ I_OUTPUTPICTURES ] = p_pic;
167 /*****************************************************************************
168 * End: terminate aa video thread output method
169 *****************************************************************************/
170 static void End( vout_thread_t *p_vout )
175 /*****************************************************************************
176 * Destroy: destroy aa video thread output method
177 *****************************************************************************
178 * Terminate an output method created by AaCreateOutputMethod
179 *****************************************************************************/
180 static void Destroy( vlc_object_t *p_this )
182 vout_thread_t *p_vout = (vout_thread_t *)p_this;
184 aa_close( p_vout->p_sys->aa_context );
185 free( p_vout->p_sys );
188 /*****************************************************************************
189 * Manage: handle aa events
190 *****************************************************************************
191 * This function should be called regularly by video output thread. It manages
192 * console events. It returns a non null value on error.
193 *****************************************************************************/
194 static int Manage( vout_thread_t *p_vout )
197 event = aa_getevent( p_vout->p_sys->aa_context, 0 );
201 aa_getmouse( p_vout->p_sys->aa_context, &x, &y, &b );
202 if ( b & AA_BUTTON3 )
204 intf_thread_t *p_intf;
205 p_intf = vlc_object_find( p_vout, VLC_OBJECT_INTF, FIND_ANYWHERE );
208 p_intf->b_menu_change = 1;
209 vlc_object_release( p_intf );
214 p_vout->i_changes |= VOUT_SIZE_CHANGE;
215 aa_resize( p_vout->p_sys->aa_context );
216 p_vout->p_sys->i_width = aa_imgwidth( p_vout->p_sys->aa_context );
217 p_vout->p_sys->i_height = aa_imgheight( p_vout->p_sys->aa_context );
225 /*****************************************************************************
226 * Render: render previously calculated output
227 *****************************************************************************/
228 static void Render( vout_thread_t *p_vout, picture_t *p_pic )
230 aa_fastrender( p_vout->p_sys->aa_context, 0, 0,
231 aa_imgwidth( p_vout->p_sys->aa_context ),
232 aa_imgheight( p_vout->p_sys->aa_context ) );
235 /*****************************************************************************
236 * Display: displays previously rendered output
237 *****************************************************************************/
238 static void Display( vout_thread_t *p_vout, picture_t *p_pic )
240 /* No need to do anything, the fake direct buffers stay as they are */
241 int i_width, i_height, i_x, i_y;
243 vout_PlacePicture( p_vout, p_vout->p_sys->i_width, p_vout->p_sys->i_height,
244 &i_x, &i_y, &i_width, &i_height );
246 aa_flush(p_vout->p_sys->aa_context);
249 /*****************************************************************************
250 * SetPalette: set the 8bpp palette
251 *****************************************************************************/
252 static void SetPalette( vout_thread_t *p_vout,
253 uint16_t *red, uint16_t *green, uint16_t *blue )
257 /* Fill colors with color information */
258 for( i = 0; i < 256; i++ )
260 aa_setpalette( p_vout->p_sys->palette, 256 -i,
261 red[ i ], green[ i ], blue[ i ] );