mirror of
https://code.videolan.org/videolan/vlc
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204 lines
6.9 KiB
C
204 lines
6.9 KiB
C
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/*****************************************************************************
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* caca.c: Color ASCII Art video output plugin using libcaca
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*****************************************************************************
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* Copyright (C) 2003 VideoLAN
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* $Id: caca.c,v 1.1 2003/11/16 22:29:33 sam Exp $
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*
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* Authors: Sam Hocevar <sam@zoy.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., 59 Temple Place - Suite 330, Boston, MA 02111, 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 <caca.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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#include <vlc_keys.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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/*****************************************************************************
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* Module descriptor
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*****************************************************************************/
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vlc_module_begin();
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set_description( _("color ASCII art video output") );
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set_capability( "video output", 12 );
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set_callbacks( Create, Destroy );
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vlc_module_end();
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/*****************************************************************************
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* Create: allocates libcaca video output thread
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*****************************************************************************
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* This function initializes libcaca 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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if( caca_init() )
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{
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msg_Err( p_vout, "cannot initialize libcaca" );
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return VLC_EGENERIC;
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}
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caca_set_dithering( CACA_DITHER_RANDOM );
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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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return VLC_SUCCESS;
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}
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/*****************************************************************************
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* Init: initialize libcaca video output thread
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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','V','2','4');
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p_vout->output.i_width = p_vout->render.i_width;
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p_vout->output.i_height = p_vout->render.i_height;
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p_vout->output.i_aspect = p_vout->render.i_aspect;
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p_vout->output.i_rmask = 0x00ff0000;
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p_vout->output.i_gmask = 0x0000ff00;
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p_vout->output.i_bmask = 0x000000ff;
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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 VLC_EGENERIC;
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}
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/* Allocate the picture */
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p_pic->p->i_lines = p_vout->output.i_height;
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p_pic->p->i_pitch = 4 * ((p_vout->output.i_width + 15) & ~15);
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p_pic->p->i_pixel_pitch = 4;
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p_pic->p->i_visible_pitch = 4 * p_vout->output.i_width;
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p_pic->i_planes = 1;
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p_pic->p->p_pixels = malloc( p_pic->p->i_pitch * p_pic->p->i_lines );
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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 VLC_SUCCESS;
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}
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/*****************************************************************************
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* End: terminate libcaca video output thread
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*****************************************************************************/
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static void End( vout_thread_t *p_vout )
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{
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return;
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}
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/*****************************************************************************
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* Destroy: destroy libcaca video output thread
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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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caca_end();
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}
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/*****************************************************************************
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* Manage: handle libcaca 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 key;
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vlc_value_t val;
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while(( key = caca_get_key() ))
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{
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switch( key )
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{
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case 'q':
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val.i_int = KEY_MODIFIER_CTRL | 'q';
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break;
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case ' ':
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val.i_int = KEY_SPACE;
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break;
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default:
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continue;
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}
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var_Set( p_vout->p_vlc, "key-pressed", val );
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}
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return VLC_SUCCESS;
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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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caca_clear();
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caca_blit( 0, 0, caca_get_width() - 1, caca_get_height() - 1,
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p_pic->p->p_pixels,
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p_vout->output.i_width, p_vout->output.i_height );
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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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caca_refresh();
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}
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