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 #include <vlc/vlc.h>
  32 #include <vlc_vout.h>
  33 #include <vlc_interface.h>
  34
  35 /*****************************************************************************
  36  * Local prototypes
  37  *****************************************************************************/
  38 static int  Create    ( vlc_object_t * );
  39 static void Destroy   ( vlc_object_t * );
  40
  41 static int  Init      ( vout_thread_t * );
  42 static void End       ( vout_thread_t * );
  43 static int  Manage    ( vout_thread_t * );
  44 static void Render    ( vout_thread_t *, picture_t * );
  45 static void Display   ( vout_thread_t *, picture_t * );
  46
  47 static void SetPalette     ( vout_thread_t *, uint16_t *, uint16_t *, uint16_t * );
  48
  49 /*****************************************************************************
  50  * Module descriptor
  51  *****************************************************************************/
  52 vlc_module_begin();
  53     set_shortname( _("ASCII Art"));
  54     set_category( CAT_VIDEO );
  55     set_subcategory( SUBCAT_VIDEO_VOUT );
  56     set_description( _("ASCII-art video output") );
  57     set_capability( "video output", 10 );
  58     add_shortcut( "aalib" );
  59     set_callbacks( Create, Destroy );
  60 vlc_module_end();
  61
  62 /*****************************************************************************
  63  * vout_sys_t: aa video output method descriptor
  64  *****************************************************************************
  65  * This structure is part of the video output thread descriptor.
  66  * It describes the aa specific properties of an output thread.
  67  *****************************************************************************/
  68 struct vout_sys_t
  69 {
  70     struct aa_context*  aa_context;
  71     aa_palette          palette;
  72     int                 i_width;                     /* width of main window */
  73     int                 i_height;                   /* height of main window */
  74 };
  75
  76 /*****************************************************************************
  77  * Create: allocates aa video thread output method
  78  *****************************************************************************
  79  * This function allocates and initializes a aa vout method.
  80  *****************************************************************************/
  81 static int Create( vlc_object_t *p_this )
  82 {
  83     vout_thread_t *p_vout = (vout_thread_t *)p_this;
  84
  85     /* Allocate structure */
  86     p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
  87     if( p_vout->p_sys == NULL )
  88     {
  89         msg_Err( p_vout, "out of memory" );
  90         return( 1 );
  91     }
  92
  93     /* Don't parse any options, but take $AAOPTS into account */
  94     aa_parseoptions( NULL, NULL, NULL, NULL );
  95
  96     if (!(p_vout->p_sys->aa_context = aa_autoinit(&aa_defparams)))
  97     {
  98         msg_Err( p_vout, "cannot initialize aalib" );
  99         return( 1 );
 100     }
 101
 102     p_vout->pf_init = Init;
 103     p_vout->pf_end = End;
 104     p_vout->pf_manage = Manage;
 105     p_vout->pf_render = Render;
 106     p_vout->pf_display = Display;
 107
 108     p_vout->p_sys->i_width = aa_imgwidth(p_vout->p_sys->aa_context);
 109     p_vout->p_sys->i_height = aa_imgheight(p_vout->p_sys->aa_context);
 110     aa_autoinitkbd( p_vout->p_sys->aa_context, 0 );
 111     aa_autoinitmouse( p_vout->p_sys->aa_context, AA_MOUSEPRESSMASK );
 112     aa_hidemouse( p_vout->p_sys->aa_context );
 113     return( 0 );
 114 }
 115
 116 /*****************************************************************************
 117  * Init: initialize aa video thread output method
 118  *****************************************************************************/
 119 static int Init( vout_thread_t *p_vout )
 120 {
 121     int i_index;
 122     picture_t *p_pic = NULL;
 123
 124     I_OUTPUTPICTURES = 0;
 125
 126     p_vout->output.i_chroma = VLC_FOURCC('R','G','B','2');
 127     p_vout->output.i_width = p_vout->p_sys->i_width;
 128     p_vout->output.i_height = p_vout->p_sys->i_height;
 129     p_vout->output.i_aspect = p_vout->p_sys->i_width
 130                                * VOUT_ASPECT_FACTOR / p_vout->p_sys->i_height;
 131     p_vout->output.pf_setpalette = SetPalette;
 132
 133     /* Find an empty picture slot */
 134     for( i_index = 0 ; i_index < VOUT_MAX_PICTURES ; i_index++ )
 135     {
 136         if( p_vout->p_picture[ i_index ].i_status == FREE_PICTURE )
 137         {
 138             p_pic = p_vout->p_picture + i_index;
 139             break;
 140         }
 141     }
 142
 143     if( p_pic == NULL )
 144     {
 145         return -1;
 146     }
 147
 148     /* Allocate the picture */
 149     p_pic->p->p_pixels = aa_image( p_vout->p_sys->aa_context );
 150     p_pic->p->i_lines = p_vout->p_sys->i_height;
 151     p_pic->p->i_visible_lines = p_vout->p_sys->i_height;
 152     p_pic->p->i_pitch = p_vout->p_sys->i_width;
 153     p_pic->p->i_pixel_pitch = 1;
 154     p_pic->p->i_visible_pitch = p_vout->p_sys->i_width;
 155     p_pic->i_planes = 1;
 156
 157     p_pic->i_status = DESTROYED_PICTURE;
 158     p_pic->i_type   = DIRECT_PICTURE;
 159
 160     PP_OUTPUTPICTURE[ I_OUTPUTPICTURES ] = p_pic;
 161     I_OUTPUTPICTURES++;
 162
 163     return 0;
 164 }
 165
 166 /*****************************************************************************
 167  * End: terminate aa video thread output method
 168  *****************************************************************************/
 169 static void End( vout_thread_t *p_vout )
 170 {
 171     ;
 172 }
 173
 174 /*****************************************************************************
 175  * Destroy: destroy aa video thread output method
 176  *****************************************************************************
 177  * Terminate an output method created by AaCreateOutputMethod
 178  *****************************************************************************/
 179 static void Destroy( vlc_object_t *p_this )
 180 {
 181     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 182
 183     aa_close( p_vout->p_sys->aa_context );
 184     free( p_vout->p_sys );
 185 }
 186
 187 /*****************************************************************************
 188  * Manage: handle aa events
 189  *****************************************************************************
 190  * This function should be called regularly by video output thread. It manages
 191  * console events. It returns a non null value on error.
 192  *****************************************************************************/
 193 static int Manage( vout_thread_t *p_vout )
 194 {
 195     int event, x, y, b;
 196     event = aa_getevent( p_vout->p_sys->aa_context, 0 );
 197     switch ( event )
 198     {
 199     case AA_MOUSE:
 200         aa_getmouse( p_vout->p_sys->aa_context, &x, &y, &b );
 201         if ( b & AA_BUTTON3 )
 202         {
 203             intf_thread_t *p_intf;
 204             p_intf = vlc_object_find( p_vout, VLC_OBJECT_INTF, FIND_ANYWHERE );
 205             if( p_intf )
 206             {
 207                 p_intf->b_menu_change = 1;
 208                 vlc_object_release( p_intf );
 209             }
 210         }
 211         break;
 212     case AA_RESIZE:
 213         p_vout->i_changes |= VOUT_SIZE_CHANGE;
 214         aa_resize( p_vout->p_sys->aa_context );
 215         p_vout->p_sys->i_width = aa_imgwidth( p_vout->p_sys->aa_context );
 216         p_vout->p_sys->i_height = aa_imgheight( p_vout->p_sys->aa_context );
 217         break;
 218     default:
 219         break;
 220     }
 221     return( 0 );
 222 }
 223
 224 /*****************************************************************************
 225  * Render: render previously calculated output
 226  *****************************************************************************/
 227 static void Render( vout_thread_t *p_vout, picture_t *p_pic )
 228 {
 229   aa_fastrender( p_vout->p_sys->aa_context, 0, 0,
 230                  aa_imgwidth( p_vout->p_sys->aa_context ),
 231                  aa_imgheight( p_vout->p_sys->aa_context ) );
 232 }
 233
 234 /*****************************************************************************
 235  * Display: displays previously rendered output
 236  *****************************************************************************/
 237 static void Display( vout_thread_t *p_vout, picture_t *p_pic )
 238 {
 239     /* No need to do anything, the fake direct buffers stay as they are */
 240     int i_width, i_height, i_x, i_y;
 241
 242     vout_PlacePicture( p_vout, p_vout->p_sys->i_width, p_vout->p_sys->i_height,
 243                        &i_x, &i_y, &i_width, &i_height );
 244
 245     aa_flush(p_vout->p_sys->aa_context);
 246 }
 247
 248 /*****************************************************************************
 249  * SetPalette: set the 8bpp palette
 250  *****************************************************************************/
 251 static void SetPalette( vout_thread_t *p_vout,
 252                         uint16_t *red, uint16_t *green, uint16_t *blue )
 253 {
 254     int i;
 255
 256     /* Fill colors with color information */
 257     for( i = 0; i < 256; i++ )
 258     {
 259         aa_setpalette( p_vout->p_sys->palette, 256 -i,
 260                        red[ i ], green[ i ], blue[ i ] );
 261     }
 262 }
 263