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_vout.h>
  37 #include <vlc_interface.h>
  38
  39 /*****************************************************************************
  40  * Local prototypes
  41  *****************************************************************************/
  42 static int  Create    ( vlc_object_t * );
  43 static void Destroy   ( vlc_object_t * );
  44
  45 static int  Init      ( vout_thread_t * );
  46 static void End       ( vout_thread_t * );
  47 static int  Manage    ( vout_thread_t * );
  48 static void Render    ( vout_thread_t *, picture_t * );
  49 static void Display   ( vout_thread_t *, picture_t * );
  50
  51 static void SetPalette     ( vout_thread_t *, uint16_t *, uint16_t *, uint16_t * );
  52
  53 /*****************************************************************************
  54  * Module descriptor
  55  *****************************************************************************/
  56 vlc_module_begin();
  57     set_shortname( _("ASCII Art"));
  58     set_category( CAT_VIDEO );
  59     set_subcategory( SUBCAT_VIDEO_VOUT );
  60     set_description( _("ASCII-art video output") );
  61     set_capability( "video output", 10 );
  62     add_shortcut( "aalib" );
  63     set_callbacks( Create, Destroy );
  64 vlc_module_end();
  65
  66 /*****************************************************************************
  67  * vout_sys_t: aa video output method descriptor
  68  *****************************************************************************
  69  * This structure is part of the video output thread descriptor.
  70  * It describes the aa specific properties of an output thread.
  71  *****************************************************************************/
  72 struct vout_sys_t
  73 {
  74     struct aa_context*  aa_context;
  75     aa_palette          palette;
  76     int                 i_width;                     /* width of main window */
  77     int                 i_height;                   /* height of main window */
  78 };
  79
  80 /*****************************************************************************
  81  * Create: allocates aa video thread output method
  82  *****************************************************************************
  83  * This function allocates and initializes a aa vout method.
  84  *****************************************************************************/
  85 static int Create( vlc_object_t *p_this )
  86 {
  87     vout_thread_t *p_vout = (vout_thread_t *)p_this;
  88
  89     /* Allocate structure */
  90     p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
  91     if( p_vout->p_sys == NULL )
  92     {
  93         msg_Err( p_vout, "out of memory" );
  94         return( 1 );
  95     }
  96
  97     /* Don't parse any options, but take $AAOPTS into account */
  98     aa_parseoptions( NULL, NULL, NULL, NULL );
  99
 100     if (!(p_vout->p_sys->aa_context = aa_autoinit(&aa_defparams)))
 101     {
 102         msg_Err( p_vout, "cannot initialize aalib" );
 103         return( 1 );
 104     }
 105
 106     p_vout->pf_init = Init;
 107     p_vout->pf_end = End;
 108     p_vout->pf_manage = Manage;
 109     p_vout->pf_render = Render;
 110     p_vout->pf_display = Display;
 111
 112     p_vout->p_sys->i_width = aa_imgwidth(p_vout->p_sys->aa_context);
 113     p_vout->p_sys->i_height = aa_imgheight(p_vout->p_sys->aa_context);
 114     aa_autoinitkbd( p_vout->p_sys->aa_context, 0 );
 115     aa_autoinitmouse( p_vout->p_sys->aa_context, AA_MOUSEPRESSMASK );
 116     aa_hidemouse( p_vout->p_sys->aa_context );
 117     return( 0 );
 118 }
 119
 120 /*****************************************************************************
 121  * Init: initialize aa video thread output method
 122  *****************************************************************************/
 123 static int Init( vout_thread_t *p_vout )
 124 {
 125     int i_index;
 126     picture_t *p_pic = NULL;
 127
 128     I_OUTPUTPICTURES = 0;
 129
 130     p_vout->output.i_chroma = VLC_FOURCC('R','G','B','2');
 131     p_vout->output.i_width = p_vout->p_sys->i_width;
 132     p_vout->output.i_height = p_vout->p_sys->i_height;
 133     p_vout->output.i_aspect = p_vout->p_sys->i_width
 134                                * VOUT_ASPECT_FACTOR / p_vout->p_sys->i_height;
 135     p_vout->output.pf_setpalette = SetPalette;
 136
 137     /* Find an empty picture slot */
 138     for( i_index = 0 ; i_index < VOUT_MAX_PICTURES ; i_index++ )
 139     {
 140         if( p_vout->p_picture[ i_index ].i_status == FREE_PICTURE )
 141         {
 142             p_pic = p_vout->p_picture + i_index;
 143             break;
 144         }
 145     }
 146
 147     if( p_pic == NULL )
 148     {
 149         return -1;
 150     }
 151
 152     /* Allocate the picture */
 153     p_pic->p->p_pixels = aa_image( p_vout->p_sys->aa_context );
 154     p_pic->p->i_lines = p_vout->p_sys->i_height;
 155     p_pic->p->i_visible_lines = p_vout->p_sys->i_height;
 156     p_pic->p->i_pitch = p_vout->p_sys->i_width;
 157     p_pic->p->i_pixel_pitch = 1;
 158     p_pic->p->i_visible_pitch = p_vout->p_sys->i_width;
 159     p_pic->i_planes = 1;
 160
 161     p_pic->i_status = DESTROYED_PICTURE;
 162     p_pic->i_type   = DIRECT_PICTURE;
 163
 164     PP_OUTPUTPICTURE[ I_OUTPUTPICTURES ] = p_pic;
 165     I_OUTPUTPICTURES++;
 166
 167     return 0;
 168 }
 169
 170 /*****************************************************************************
 171  * End: terminate aa video thread output method
 172  *****************************************************************************/
 173 static void End( vout_thread_t *p_vout )
 174 {
 175     ;
 176 }
 177
 178 /*****************************************************************************
 179  * Destroy: destroy aa video thread output method
 180  *****************************************************************************
 181  * Terminate an output method created by AaCreateOutputMethod
 182  *****************************************************************************/
 183 static void Destroy( vlc_object_t *p_this )
 184 {
 185     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 186
 187     aa_close( p_vout->p_sys->aa_context );
 188     free( p_vout->p_sys );
 189 }
 190
 191 /*****************************************************************************
 192  * Manage: handle aa 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 )
 198 {
 199     int event, x, y, b;
 200     event = aa_getevent( p_vout->p_sys->aa_context, 0 );
 201     switch ( event )
 202     {
 203     case AA_MOUSE:
 204         aa_getmouse( p_vout->p_sys->aa_context, &x, &y, &b );
 205         if ( b & AA_BUTTON3 )
 206         {
 207             intf_thread_t *p_intf;
 208             p_intf = vlc_object_find( p_vout, VLC_OBJECT_INTF, FIND_ANYWHERE );
 209             if( p_intf )
 210             {
 211                 p_intf->b_menu_change = 1;
 212                 vlc_object_release( p_intf );
 213             }
 214         }
 215         break;
 216     case AA_RESIZE:
 217         p_vout->i_changes |= VOUT_SIZE_CHANGE;
 218         aa_resize( p_vout->p_sys->aa_context );
 219         p_vout->p_sys->i_width = aa_imgwidth( p_vout->p_sys->aa_context );
 220         p_vout->p_sys->i_height = aa_imgheight( p_vout->p_sys->aa_context );
 221         break;
 222     default:
 223         break;
 224     }
 225     return( 0 );
 226 }
 227
 228 /*****************************************************************************
 229  * Render: render previously calculated output
 230  *****************************************************************************/
 231 static void Render( vout_thread_t *p_vout, picture_t *p_pic )
 232 {
 233   aa_fastrender( p_vout->p_sys->aa_context, 0, 0,
 234                  aa_imgwidth( p_vout->p_sys->aa_context ),
 235                  aa_imgheight( p_vout->p_sys->aa_context ) );
 236 }
 237
 238 /*****************************************************************************
 239  * Display: displays previously rendered output
 240  *****************************************************************************/
 241 static void Display( vout_thread_t *p_vout, picture_t *p_pic )
 242 {
 243     /* No need to do anything, the fake direct buffers stay as they are */
 244     int i_width, i_height, i_x, i_y;
 245
 246     vout_PlacePicture( p_vout, p_vout->p_sys->i_width, p_vout->p_sys->i_height,
 247                        &i_x, &i_y, &i_width, &i_height );
 248
 249     aa_flush(p_vout->p_sys->aa_context);
 250 }
 251
 252 /*****************************************************************************
 253  * SetPalette: set the 8bpp palette
 254  *****************************************************************************/
 255 static void SetPalette( vout_thread_t *p_vout,
 256                         uint16_t *red, uint16_t *green, uint16_t *blue )
 257 {
 258     int i;
 259
 260     /* Fill colors with color information */
 261     for( i = 0; i < 256; i++ )
 262     {
 263         aa_setpalette( p_vout->p_sys->palette, 256 -i,
 264                        red[ i ], green[ i ], blue[ i ] );
 265     }
 266 }
 267