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) 2002-2009 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 #ifdef HAVE_CONFIG_H
  28 # include "config.h"
  29 #endif
  30
  31 #include <aalib.h>
  32
  33 #include <vlc_common.h>
  34 #include <vlc_plugin.h>
  35 #include <vlc_vout.h>
  36
  37 /*****************************************************************************
  38  * Local prototypes
  39  *****************************************************************************/
  40 static int  Create    ( vlc_object_t * );
  41 static void Destroy   ( vlc_object_t * );
  42
  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 * );
  48
  49 static void SetPalette     ( vout_thread_t *, uint16_t *, uint16_t *, uint16_t * );
  50
  51 /*****************************************************************************
  52  * Module descriptor
  53  *****************************************************************************/
  54 vlc_module_begin ()
  55     set_shortname( N_("ASCII Art"))
  56     set_category( CAT_VIDEO )
  57     set_subcategory( SUBCAT_VIDEO_VOUT )
  58     set_description( N_("ASCII-art video output") )
  59     set_capability( "video output", 10 )
  60     add_shortcut( "aalib" )
  61     set_callbacks( Create, Destroy )
  62 vlc_module_end ()
  63
  64 /*****************************************************************************
  65  * vout_sys_t: aa video output method descriptor
  66  *****************************************************************************
  67  * This structure is part of the video output thread descriptor.
  68  * It describes the aa specific properties of an output thread.
  69  *****************************************************************************/
  70 struct vout_sys_t
  71 {
  72     struct aa_context*  aa_context;
  73     aa_palette          palette;
  74     int                 i_width;                     /* width of main window */
  75     int                 i_height;                   /* height of main window */
  76 };
  77
  78 /*****************************************************************************
  79  * Create: allocates aa video thread output method
  80  *****************************************************************************
  81  * This function allocates and initializes a aa vout method.
  82  *****************************************************************************/
  83 static int Create( vlc_object_t *p_this )
  84 {
  85     vout_thread_t *p_vout = (vout_thread_t *)p_this;
  86
  87     /* Allocate structure */
  88     p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
  89     if( p_vout->p_sys == NULL )
  90         return VLC_ENOMEM;
  91
  92     /* Don't parse any options, but take $AAOPTS into account */
  93     aa_parseoptions( NULL, NULL, NULL, NULL );
  94
  95     if (!(p_vout->p_sys->aa_context = aa_autoinit(&aa_defparams)))
  96     {
  97         msg_Err( p_vout, "cannot initialize aalib" );
  98         free( p_vout->p_sys );
  99         return VLC_EGENERIC;
 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
 114     return VLC_SUCCESS;
 115 }
 116
 117 /*****************************************************************************
 118  * Init: initialize aa video thread output method
 119  *****************************************************************************/
 120 static int Init( vout_thread_t *p_vout )
 121 {
 122     int i_index;
 123     picture_t *p_pic = NULL;
 124
 125     I_OUTPUTPICTURES = 0;
 126
 127     p_vout->output.i_chroma = VLC_CODEC_RGB8;
 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;
 133
 134     /* Find an empty picture slot */
 135     for( i_index = 0 ; i_index < VOUT_MAX_PICTURES ; i_index++ )
 136     {
 137         if( p_vout->p_picture[ i_index ].i_status == FREE_PICTURE )
 138         {
 139             p_pic = p_vout->p_picture + i_index;
 140             break;
 141         }
 142     }
 143
 144     if( p_pic == NULL )
 145         return VLC_EGENERIC;
 146
 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_visible_lines = p_vout->p_sys->i_height;
 151     p_pic->p->i_pitch = p_vout->p_sys->i_width;
 152     p_pic->p->i_pixel_pitch = 1;
 153     p_pic->p->i_visible_pitch = p_vout->p_sys->i_width;
 154     p_pic->i_planes = 1;
 155
 156     p_pic->i_status = DESTROYED_PICTURE;
 157     p_pic->i_type   = DIRECT_PICTURE;
 158
 159     PP_OUTPUTPICTURE[ I_OUTPUTPICTURES ] = p_pic;
 160     I_OUTPUTPICTURES++;
 161
 162     return VLC_SUCCESS;
 163 }
 164
 165 /*****************************************************************************
 166  * End: terminate aa video thread output method
 167  *****************************************************************************/
 168 static void End( vout_thread_t *p_vout )
 169 {
 170     ;
 171 }
 172
 173 /*****************************************************************************
 174  * Destroy: destroy aa video thread output method
 175  *****************************************************************************
 176  * Terminate an output method created by AaCreateOutputMethod
 177  *****************************************************************************/
 178 static void Destroy( vlc_object_t *p_this )
 179 {
 180     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 181
 182     aa_close( p_vout->p_sys->aa_context );
 183     free( p_vout->p_sys );
 184 }
 185
 186 /*****************************************************************************
 187  * Manage: handle aa events
 188  *****************************************************************************
 189  * This function should be called regularly by video output thread. It manages
 190  * console events. It returns a non null value on error.
 191  *****************************************************************************/
 192 static int Manage( vout_thread_t *p_vout )
 193 {
 194     int event, x, y, b;
 195     event = aa_getevent( p_vout->p_sys->aa_context, 0 );
 196     switch ( event )
 197     {
 198     case AA_MOUSE:
 199         aa_getmouse( p_vout->p_sys->aa_context, &x, &y, &b );
 200         if ( b & AA_BUTTON3 )
 201             var_SetBool( p_vout->p_libvlc, "intf-popupmenu", true );
 202         break;
 203     case AA_RESIZE:
 204         p_vout->i_changes |= VOUT_SIZE_CHANGE;
 205         aa_resize( p_vout->p_sys->aa_context );
 206         p_vout->p_sys->i_width = aa_imgwidth( p_vout->p_sys->aa_context );
 207         p_vout->p_sys->i_height = aa_imgheight( p_vout->p_sys->aa_context );
 208         break;
 209     default:
 210         break;
 211     }
 212     return VLC_SUCCESS;
 213 }
 214
 215 /*****************************************************************************
 216  * Render: render previously calculated output
 217  *****************************************************************************/
 218 static void Render( vout_thread_t *p_vout, picture_t *p_pic )
 219 {
 220   aa_fastrender( p_vout->p_sys->aa_context, 0, 0,
 221                  aa_imgwidth( p_vout->p_sys->aa_context ),
 222                  aa_imgheight( p_vout->p_sys->aa_context ) );
 223 }
 224
 225 /*****************************************************************************
 226  * Display: displays previously rendered output
 227  *****************************************************************************/
 228 static void Display( vout_thread_t *p_vout, picture_t *p_pic )
 229 {
 230     /* No need to do anything, the fake direct buffers stay as they are */
 231     unsigned int i_width, i_height, i_x, i_y;
 232
 233     vout_PlacePicture( p_vout, p_vout->p_sys->i_width, p_vout->p_sys->i_height,
 234                        &i_x, &i_y, &i_width, &i_height );
 235
 236     aa_flush(p_vout->p_sys->aa_context);
 237 }
 238
 239 /*****************************************************************************
 240  * SetPalette: set the 8bpp palette
 241  *****************************************************************************/
 242 static void SetPalette( vout_thread_t *p_vout,
 243                         uint16_t *red, uint16_t *green, uint16_t *blue )
 244 {
 245     int i;
 246
 247     /* Fill colors with color information */
 248     for( i = 0; i < 256; i++ )
 249     {
 250         aa_setpalette( p_vout->p_sys->palette, 256 -i,
 251                        red[ i ], green[ i ], blue[ i ] );
 252     }
 253 }
 254