git.sesse.net Git - vlc/blob - modules/video_output/aa.c

   1 /*****************************************************************************
   2  * vout_aa.c: Aa video output display method for testing purposes
   3  *****************************************************************************
   4  * Copyright (C) 2002 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Sigmund Augdal Helberg <dnumgis@videolan.org>
   8  *
   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.
  13  *
  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.
  18  *
  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  *****************************************************************************/
  23
  24 /*****************************************************************************
  25  * Preamble
  26  *****************************************************************************/
  27 #include <errno.h>                                                 /* ENOMEM */
  28
  29 #include <aalib.h>
  30
  31 #ifdef HAVE_CONFIG_H
  32 # include "config.h"
  33 #endif
  34
  35 #include <vlc/vlc.h>
  36 #include <vlc_plugin.h>
  37 #include <vlc_vout.h>
  38 #include <vlc_interface.h>
  39
  40 /*****************************************************************************
  41  * Local prototypes
  42  *****************************************************************************/
  43 static int  Create    ( vlc_object_t * );
  44 static void Destroy   ( vlc_object_t * );
  45
  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 * );
  51
  52 static void SetPalette     ( vout_thread_t *, uint16_t *, uint16_t *, uint16_t * );
  53
  54 /*****************************************************************************
  55  * Module descriptor
  56  *****************************************************************************/
  57 vlc_module_begin();
  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 );
  65 vlc_module_end();
  66
  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  *****************************************************************************/
  73 struct vout_sys_t
  74 {
  75     struct aa_context*  aa_context;
  76     aa_palette          palette;
  77     int                 i_width;                     /* width of main window */
  78     int                 i_height;                   /* height of main window */
  79 };
  80
  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 )
  87 {
  88     vout_thread_t *p_vout = (vout_thread_t *)p_this;
  89
  90     /* Allocate structure */
  91     p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
  92     if( p_vout->p_sys == NULL )
  93     {
  94         msg_Err( p_vout, "out of memory" );
  95         return( 1 );
  96     }
  97
  98     /* Don't parse any options, but take $AAOPTS into account */
  99     aa_parseoptions( NULL, NULL, NULL, NULL );
 100
 101     if (!(p_vout->p_sys->aa_context = aa_autoinit(&aa_defparams)))
 102     {
 103         msg_Err( p_vout, "cannot initialize aalib" );
 104         return( 1 );
 105     }
 106
 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;
 112
 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 );
 118     return( 0 );
 119 }
 120
 121 /*****************************************************************************
 122  * Init: initialize aa video thread output method
 123  *****************************************************************************/
 124 static int Init( vout_thread_t *p_vout )
 125 {
 126     int i_index;
 127     picture_t *p_pic = NULL;
 128
 129     I_OUTPUTPICTURES = 0;
 130
 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;
 137
 138     /* Find an empty picture slot */
 139     for( i_index = 0 ; i_index < VOUT_MAX_PICTURES ; i_index++ )
 140     {
 141         if( p_vout->p_picture[ i_index ].i_status == FREE_PICTURE )
 142         {
 143             p_pic = p_vout->p_picture + i_index;
 144             break;
 145         }
 146     }
 147
 148     if( p_pic == NULL )
 149     {
 150         return -1;
 151     }
 152
 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;
 160     p_pic->i_planes = 1;
 161
 162     p_pic->i_status = DESTROYED_PICTURE;
 163     p_pic->i_type   = DIRECT_PICTURE;
 164
 165     PP_OUTPUTPICTURE[ I_OUTPUTPICTURES ] = p_pic;
 166     I_OUTPUTPICTURES++;
 167
 168     return 0;
 169 }
 170
 171 /*****************************************************************************
 172  * End: terminate aa video thread output method
 173  *****************************************************************************/
 174 static void End( vout_thread_t *p_vout )
 175 {
 176     ;
 177 }
 178
 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 )
 185 {
 186     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 187
 188     aa_close( p_vout->p_sys->aa_context );
 189     free( p_vout->p_sys );
 190 }
 191
 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 )
 199 {
 200     int event, x, y, b;
 201     event = aa_getevent( p_vout->p_sys->aa_context, 0 );
 202     switch ( event )
 203     {
 204     case AA_MOUSE:
 205         aa_getmouse( p_vout->p_sys->aa_context, &x, &y, &b );
 206         if ( b & AA_BUTTON3 )
 207         {
 208             intf_thread_t *p_intf;
 209             p_intf = vlc_object_find( p_vout, VLC_OBJECT_INTF, FIND_ANYWHERE );
 210             if( p_intf )
 211             {
 212                 p_intf->b_menu_change = 1;
 213                 vlc_object_release( p_intf );
 214             }
 215         }
 216         break;
 217     case AA_RESIZE:
 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 );
 222         break;
 223     default:
 224         break;
 225     }
 226     return( 0 );
 227 }
 228
 229 /*****************************************************************************
 230  * Render: render previously calculated output
 231  *****************************************************************************/
 232 static void Render( vout_thread_t *p_vout, picture_t *p_pic )
 233 {
 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 ) );
 237 }
 238
 239 /*****************************************************************************
 240  * Display: displays previously rendered output
 241  *****************************************************************************/
 242 static void Display( vout_thread_t *p_vout, picture_t *p_pic )
 243 {
 244     /* No need to do anything, the fake direct buffers stay as they are */
 245     int i_width, i_height, i_x, i_y;
 246
 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 );
 249
 250     aa_flush(p_vout->p_sys->aa_context);
 251 }
 252
 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 )
 258 {
 259     int i;
 260
 261     /* Fill colors with color information */
 262     for( i = 0; i < 256; i++ )
 263     {
 264         aa_setpalette( p_vout->p_sys->palette, 256 -i,
 265                        red[ i ], green[ i ], blue[ i ] );
 266     }
 267 }
 268