mirror of https://code.videolan.org/videolan/vlc
266 lines
9.7 KiB
C
266 lines
9.7 KiB
C
/*****************************************************************************
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* vout_aa.c: Aa video output display method for testing purposes
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*****************************************************************************
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* Copyright (C) 2002 the VideoLAN team
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* $Id$
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*
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* Authors: Sigmund Augdal Helberg <dnumgis@videolan.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
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*****************************************************************************/
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/*****************************************************************************
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* Preamble
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*****************************************************************************/
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#include <errno.h> /* ENOMEM */
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#include <stdlib.h> /* free() */
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#include <string.h> /* strerror() */
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#include <aalib.h>
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#include <vlc/vlc.h>
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#include <vlc/vout.h>
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#include <vlc/intf.h>
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/*****************************************************************************
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* Local prototypes
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*****************************************************************************/
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static int Create ( vlc_object_t * );
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static void Destroy ( vlc_object_t * );
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static int Init ( vout_thread_t * );
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static void End ( vout_thread_t * );
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static int Manage ( vout_thread_t * );
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static void Render ( vout_thread_t *, picture_t * );
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static void Display ( vout_thread_t *, picture_t * );
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static void SetPalette ( vout_thread_t *, uint16_t *, uint16_t *, uint16_t * );
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/*****************************************************************************
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* Module descriptor
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*****************************************************************************/
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vlc_module_begin();
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set_shortname( _("ASCII Art"));
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set_category( CAT_VIDEO );
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set_subcategory( SUBCAT_VIDEO_VOUT );
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set_description( _("ASCII-art video output") );
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set_capability( "video output", 10 );
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add_shortcut( "aalib" );
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set_callbacks( Create, Destroy );
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vlc_module_end();
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/*****************************************************************************
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* vout_sys_t: aa video output method descriptor
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*****************************************************************************
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* This structure is part of the video output thread descriptor.
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* It describes the aa specific properties of an output thread.
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*****************************************************************************/
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struct vout_sys_t
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{
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struct aa_context* aa_context;
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aa_palette palette;
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int i_width; /* width of main window */
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int i_height; /* height of main window */
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};
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/*****************************************************************************
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* Create: allocates aa video thread output method
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*****************************************************************************
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* This function allocates and initializes a aa vout method.
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*****************************************************************************/
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static int Create( vlc_object_t *p_this )
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{
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vout_thread_t *p_vout = (vout_thread_t *)p_this;
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/* Allocate structure */
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p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
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if( p_vout->p_sys == NULL )
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{
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msg_Err( p_vout, "out of memory" );
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return( 1 );
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}
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/* Don't parse any options, but take $AAOPTS into account */
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aa_parseoptions( NULL, NULL, NULL, NULL );
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if (!(p_vout->p_sys->aa_context = aa_autoinit(&aa_defparams)))
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{
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msg_Err( p_vout, "cannot initialize aalib" );
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return( 1 );
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}
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p_vout->pf_init = Init;
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p_vout->pf_end = End;
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p_vout->pf_manage = Manage;
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p_vout->pf_render = Render;
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p_vout->pf_display = Display;
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p_vout->p_sys->i_width = aa_imgwidth(p_vout->p_sys->aa_context);
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p_vout->p_sys->i_height = aa_imgheight(p_vout->p_sys->aa_context);
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aa_autoinitkbd( p_vout->p_sys->aa_context, 0 );
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aa_autoinitmouse( p_vout->p_sys->aa_context, AA_MOUSEPRESSMASK );
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aa_hidemouse( p_vout->p_sys->aa_context );
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return( 0 );
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}
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/*****************************************************************************
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* Init: initialize aa video thread output method
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*****************************************************************************/
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static int Init( vout_thread_t *p_vout )
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{
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int i_index;
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picture_t *p_pic = NULL;
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I_OUTPUTPICTURES = 0;
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p_vout->output.i_chroma = VLC_FOURCC('R','G','B','2');
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p_vout->output.i_width = p_vout->p_sys->i_width;
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p_vout->output.i_height = p_vout->p_sys->i_height;
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p_vout->output.i_aspect = p_vout->p_sys->i_width
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* VOUT_ASPECT_FACTOR / p_vout->p_sys->i_height;
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p_vout->output.pf_setpalette = SetPalette;
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/* Find an empty picture slot */
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for( i_index = 0 ; i_index < VOUT_MAX_PICTURES ; i_index++ )
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{
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if( p_vout->p_picture[ i_index ].i_status == FREE_PICTURE )
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{
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p_pic = p_vout->p_picture + i_index;
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break;
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}
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}
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if( p_pic == NULL )
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{
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return -1;
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}
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/* Allocate the picture */
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p_pic->p->p_pixels = aa_image( p_vout->p_sys->aa_context );
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p_pic->p->i_lines = p_vout->p_sys->i_height;
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p_pic->p->i_visible_lines = p_vout->p_sys->i_height;
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p_pic->p->i_pitch = p_vout->p_sys->i_width;
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p_pic->p->i_pixel_pitch = 1;
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p_pic->p->i_visible_pitch = p_vout->p_sys->i_width;
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p_pic->i_planes = 1;
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p_pic->i_status = DESTROYED_PICTURE;
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p_pic->i_type = DIRECT_PICTURE;
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PP_OUTPUTPICTURE[ I_OUTPUTPICTURES ] = p_pic;
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I_OUTPUTPICTURES++;
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return 0;
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}
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/*****************************************************************************
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* End: terminate aa video thread output method
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*****************************************************************************/
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static void End( vout_thread_t *p_vout )
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{
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;
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}
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/*****************************************************************************
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* Destroy: destroy aa video thread output method
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*****************************************************************************
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* Terminate an output method created by AaCreateOutputMethod
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*****************************************************************************/
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static void Destroy( vlc_object_t *p_this )
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{
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vout_thread_t *p_vout = (vout_thread_t *)p_this;
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aa_close( p_vout->p_sys->aa_context );
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free( p_vout->p_sys );
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}
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/*****************************************************************************
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* Manage: handle aa events
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*****************************************************************************
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* This function should be called regularly by video output thread. It manages
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* console events. It returns a non null value on error.
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*****************************************************************************/
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static int Manage( vout_thread_t *p_vout )
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{
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int event, x, y, b;
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event = aa_getevent( p_vout->p_sys->aa_context, 0 );
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switch ( event )
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{
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case AA_MOUSE:
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aa_getmouse( p_vout->p_sys->aa_context, &x, &y, &b );
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if ( b & AA_BUTTON3 )
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{
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intf_thread_t *p_intf;
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p_intf = vlc_object_find( p_vout, VLC_OBJECT_INTF, FIND_ANYWHERE );
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if( p_intf )
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{
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p_intf->b_menu_change = 1;
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vlc_object_release( p_intf );
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}
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}
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break;
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case AA_RESIZE:
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p_vout->i_changes |= VOUT_SIZE_CHANGE;
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aa_resize( p_vout->p_sys->aa_context );
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p_vout->p_sys->i_width = aa_imgwidth( p_vout->p_sys->aa_context );
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p_vout->p_sys->i_height = aa_imgheight( p_vout->p_sys->aa_context );
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break;
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default:
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break;
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}
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return( 0 );
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}
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/*****************************************************************************
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* Render: render previously calculated output
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*****************************************************************************/
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static void Render( vout_thread_t *p_vout, picture_t *p_pic )
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{
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aa_fastrender( p_vout->p_sys->aa_context, 0, 0,
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aa_imgwidth( p_vout->p_sys->aa_context ),
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aa_imgheight( p_vout->p_sys->aa_context ) );
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}
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/*****************************************************************************
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* Display: displays previously rendered output
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*****************************************************************************/
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static void Display( vout_thread_t *p_vout, picture_t *p_pic )
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{
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/* No need to do anything, the fake direct buffers stay as they are */
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int i_width, i_height, i_x, i_y;
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vout_PlacePicture( p_vout, p_vout->p_sys->i_width, p_vout->p_sys->i_height,
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&i_x, &i_y, &i_width, &i_height );
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aa_flush(p_vout->p_sys->aa_context);
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}
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/*****************************************************************************
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* SetPalette: set the 8bpp palette
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*****************************************************************************/
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static void SetPalette( vout_thread_t *p_vout,
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uint16_t *red, uint16_t *green, uint16_t *blue )
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{
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int i;
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/* Fill colors with color information */
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for( i = 0; i < 256; i++ )
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{
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aa_setpalette( p_vout->p_sys->palette, 256 -i,
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red[ i ], green[ i ], blue[ i ] );
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}
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}
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