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 VideoLAN
   5  * $Id: aa.c,v 1.1 2002/08/13 11:59:36 sam Exp $
   6  *
   7  * Authors: Sigmund Augdal <sigmunau@idi.ntnu.no>
   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., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
  22  *****************************************************************************/
  23
  24 /*****************************************************************************
  25  * Preamble
  26  *****************************************************************************/
  27 #include <errno.h>                                                 /* ENOMEM */
  28 #include <stdlib.h>                                                /* free() */
  29 #include <string.h>                                            /* strerror() */
  30
  31 #include <aalib.h>
  32
  33 #include <vlc/vlc.h>
  34 #include <vlc/vout.h>
  35 #include <vlc/intf.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 *, u16 *, u16 *, u16 * );
  50
  51 /*****************************************************************************
  52  * Module descriptor
  53  *****************************************************************************/
  54 vlc_module_begin();
  55     set_description( _("ASCII-art video output module") );
  56     set_capability( "video output", 10 );
  57     add_shortcut( "aalib" );
  58     set_callbacks( Create, Destroy );
  59 vlc_module_end();
  60
  61 /*****************************************************************************
  62  * vout_sys_t: aa video output method descriptor
  63  *****************************************************************************
  64  * This structure is part of the video output thread descriptor.
  65  * It describes the aa specific properties of an output thread.
  66  *****************************************************************************/
  67 struct vout_sys_t
  68 {
  69     struct aa_context*  aa_context;
  70     aa_palette          palette;
  71     int                 i_width;                     /* width of main window */
  72     int                 i_height;                   /* height of main window */
  73 };
  74
  75 /*****************************************************************************
  76  * Create: allocates aa video thread output method
  77  *****************************************************************************
  78  * This function allocates and initializes a aa vout method.
  79  *****************************************************************************/
  80 static int Create( vlc_object_t *p_this )
  81 {
  82     vout_thread_t *p_vout = (vout_thread_t *)p_this;
  83
  84     /* Allocate structure */
  85     p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
  86     if( p_vout->p_sys == NULL )
  87     {
  88         msg_Err( p_vout, "out of memory" );
  89         return( 1 );
  90     }
  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         return( 1 );
  99     }
 100
 101     p_vout->pf_init = Init;
 102     p_vout->pf_end = End;
 103     p_vout->pf_manage = Manage;
 104     p_vout->pf_render = Render;
 105     p_vout->pf_display = Display;
 106
 107     p_vout->p_sys->i_width = aa_imgwidth(p_vout->p_sys->aa_context);
 108     p_vout->p_sys->i_height = aa_imgheight(p_vout->p_sys->aa_context);
 109     aa_autoinitkbd( p_vout->p_sys->aa_context, 0 );
 110     aa_autoinitmouse( p_vout->p_sys->aa_context, AA_MOUSEPRESSMASK );
 111     aa_hidemouse( p_vout->p_sys->aa_context );
 112     return( 0 );
 113 }
 114
 115 /*****************************************************************************
 116  * Init: initialize aa video thread output method
 117  *****************************************************************************/
 118 static int Init( vout_thread_t *p_vout )
 119 {
 120     int i_index;
 121     picture_t *p_pic = NULL;
 122
 123     I_OUTPUTPICTURES = 0;
 124
 125     p_vout->output.i_chroma = VLC_FOURCC('R','G','B','2');
 126     p_vout->output.i_width = p_vout->p_sys->i_width;
 127     p_vout->output.i_height = p_vout->p_sys->i_height;
 128     p_vout->output.i_aspect = p_vout->p_sys->i_width
 129                                * VOUT_ASPECT_FACTOR / p_vout->p_sys->i_height;
 130     p_vout->output.pf_setpalette = SetPalette;
 131
 132     /* Find an empty picture slot */
 133     for( i_index = 0 ; i_index < VOUT_MAX_PICTURES ; i_index++ )
 134     {
 135         if( p_vout->p_picture[ i_index ].i_status == FREE_PICTURE )
 136         {
 137             p_pic = p_vout->p_picture + i_index;
 138             break;
 139         }
 140     }
 141
 142     if( p_pic == NULL )
 143     {
 144         return -1;
 145     }
 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_pitch = p_vout->p_sys->i_width;
 151     p_pic->p->i_pixel_pitch = 1;
 152     p_pic->p->i_visible_pitch = p_vout->p_sys->i_width;
 153     p_pic->i_planes = 1;
 154
 155     p_pic->i_status = DESTROYED_PICTURE;
 156     p_pic->i_type   = DIRECT_PICTURE;
 157
 158     PP_OUTPUTPICTURE[ I_OUTPUTPICTURES ] = p_pic;
 159     I_OUTPUTPICTURES++;
 160
 161     return 0;
 162 }
 163
 164 /*****************************************************************************
 165  * End: terminate aa video thread output method
 166  *****************************************************************************/
 167 static void End( vout_thread_t *p_vout )
 168 {
 169     ;
 170 }
 171
 172 /*****************************************************************************
 173  * Destroy: destroy aa video thread output method
 174  *****************************************************************************
 175  * Terminate an output method created by AaCreateOutputMethod
 176  *****************************************************************************/
 177 static void Destroy( vlc_object_t *p_this )
 178 {
 179     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 180
 181     aa_close( p_vout->p_sys->aa_context );
 182     free( p_vout->p_sys );
 183 }
 184
 185 /*****************************************************************************
 186  * Manage: handle aa events
 187  *****************************************************************************
 188  * This function should be called regularly by video output thread. It manages
 189  * console events. It returns a non null value on error.
 190  *****************************************************************************/
 191 static int Manage( vout_thread_t *p_vout )
 192 {
 193     int event, x, y, b;
 194     event = aa_getevent( p_vout->p_sys->aa_context, 0 );
 195     switch ( event )
 196     {
 197     case AA_MOUSE:
 198         aa_getmouse( p_vout->p_sys->aa_context, &x, &y, &b );
 199         if ( b & AA_BUTTON3 )
 200         {
 201             intf_thread_t *p_intf;
 202             p_intf = vlc_object_find( p_vout, VLC_OBJECT_INTF, FIND_ANYWHERE );
 203             if( p_intf )
 204             {
 205                 p_intf->b_menu_change = 1;
 206                 vlc_object_release( p_intf );
 207             }
 208         }
 209         break;
 210     case AA_RESIZE:
 211         p_vout->i_changes |= VOUT_SIZE_CHANGE;
 212         aa_resize( p_vout->p_sys->aa_context );
 213         p_vout->p_sys->i_width = aa_imgwidth( p_vout->p_sys->aa_context );
 214         p_vout->p_sys->i_height = aa_imgheight( p_vout->p_sys->aa_context );
 215         break;
 216     default:
 217         break;
 218     }
 219     return( 0 );
 220 }
 221
 222 /*****************************************************************************
 223  * Render: render previously calculated output
 224  *****************************************************************************/
 225 static void Render( vout_thread_t *p_vout, picture_t *p_pic )
 226 {
 227   aa_fastrender( p_vout->p_sys->aa_context, 0, 0,
 228                  aa_imgwidth( p_vout->p_sys->aa_context ),
 229                  aa_imgheight( p_vout->p_sys->aa_context ) );
 230 }
 231
 232 /*****************************************************************************
 233  * Display: displays previously rendered output
 234  *****************************************************************************/
 235 static void Display( vout_thread_t *p_vout, picture_t *p_pic )
 236 {
 237     /* No need to do anything, the fake direct buffers stay as they are */
 238     int i_width, i_height, i_x, i_y;
 239
 240     vout_PlacePicture( p_vout, p_vout->p_sys->i_width, p_vout->p_sys->i_height,
 241                        &i_x, &i_y, &i_width, &i_height );
 242
 243     aa_flush(p_vout->p_sys->aa_context);
 244 }
 245
 246 /*****************************************************************************
 247  * SetPalette: set the 8bpp palette
 248  *****************************************************************************/
 249 static void SetPalette( vout_thread_t *p_vout, u16 *red, u16 *green, u16 *blue )
 250 {
 251     int i;
 252
 253     /* Fill colors with color information */
 254     for( i = 0; i < 256; i++ )
 255     {
 256         aa_setpalette( p_vout->p_sys->palette, 256 -i,
 257                        red[ i ], green[ i ], blue[ i ] );
 258     }
 259 }
 260