mirror of
https://code.videolan.org/videolan/vlc
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266 lines
9.1 KiB
C
266 lines
9.1 KiB
C
/*****************************************************************************
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* svgalib.c : SVGAlib plugin for vlc
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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: Samuel 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., 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 <vlc/vlc.h>
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#include <vlc_vout.h>
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#include <vga.h>
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#include <vgagl.h>
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#include <vgakeyboard.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 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( "SVGAlib" );
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set_category( CAT_VIDEO );
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set_subcategory( SUBCAT_VIDEO_VOUT );
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set_description( _("SVGAlib video output") );
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set_capability( "video output", 0 );
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set_callbacks( Create, Destroy );
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linked_with_a_crap_library_which_uses_atexit();
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vlc_module_end();
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/*****************************************************************************
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* vout_sys_t: video output 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 SVGAlib 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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int i_vgamode;
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};
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/*****************************************************************************
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* Create: allocates video thread
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*****************************************************************************
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* This function allocates and initializes a 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 instance and initialize some members */
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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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return VLC_ENOMEM;
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}
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/* FIXME: find a way to test for SVGAlib availability. We cannot call
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* vga_init from here because it needs to be closed from the same thread
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* and we might give away the video output to another thread. Bah, it
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* doesn't matter anyway ... SVGAlib is being an UGLY DIRTY PIG and calls
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* atexit() and exit() so what can we do? */
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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 = NULL;
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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 video 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;
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I_OUTPUTPICTURES = 0;
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/* SVGAlib shut up! */
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vga_disabledriverreport();
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/* We cannot call vga_init() in Create() because it has to be run
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* from the same thread as the other vga calls. */
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vga_init();
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/* Check that we have a 8bpp mode available */
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p_vout->p_sys->i_vgamode = vga_getdefaultmode();
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if( p_vout->p_sys->i_vgamode == -1
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|| vga_getmodeinfo(p_vout->p_sys->i_vgamode)->bytesperpixel != 1 )
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{
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p_vout->p_sys->i_vgamode = G320x200x256;
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}
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if( !vga_hasmode( p_vout->p_sys->i_vgamode ) )
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{
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msg_Err( p_vout, "mode %i not available", p_vout->p_sys->i_vgamode );
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return VLC_EGENERIC;
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}
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vga_setmode( p_vout->p_sys->i_vgamode );
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gl_setcontextvga( p_vout->p_sys->i_vgamode );
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gl_enableclipping();
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if( keyboard_init() )
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{
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msg_Err( p_vout, "could not initialize keyboard" );
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vga_setmode( TEXT );
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return VLC_EGENERIC;
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}
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/* Just in case */
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keyboard_translatekeys( TRANSLATE_CURSORKEYS |
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TRANSLATE_KEYPADENTER |
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TRANSLATE_DIAGONAL );
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/* Initialize the output structure: RGB with square pixels, whatever
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* the input format is, since it's the only format we know */
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p_vout->output.i_chroma = VLC_FOURCC('R','G','B','2');
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p_vout->output.pf_setpalette = SetPalette;
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p_vout->output.i_width = vga_getxdim();
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p_vout->output.i_height = vga_getydim();
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p_vout->output.i_aspect = p_vout->output.i_width
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* VOUT_ASPECT_FACTOR / p_vout->output.i_height;
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/* Try to initialize 1 direct buffer */
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p_pic = NULL;
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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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/* Allocate the picture */
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if( p_pic == NULL )
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{
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return VLC_SUCCESS;
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}
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vout_AllocatePicture( p_vout, p_pic, p_vout->output.i_chroma,
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p_vout->output.i_width, p_vout->output.i_height,
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p_vout->output.i_aspect );
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if( p_pic->i_planes == 0 )
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{
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return VLC_SUCCESS;
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}
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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 video 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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keyboard_close();
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vga_clear();
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vga_setmode( TEXT );
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}
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/*****************************************************************************
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* Destroy: destroy video thread
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*****************************************************************************
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* Terminate an output method created by Create
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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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/* Destroy structure */
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free( p_vout->p_sys );
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}
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/*****************************************************************************
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* Manage: handle SVGAlib 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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keyboard_update();
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if( keyboard_keypressed(SCANCODE_ESCAPE)
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|| keyboard_keypressed(SCANCODE_Q ) )
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{
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vlc_object_kill( p_vout->p_libvlc );
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}
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return VLC_SUCCESS;
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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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* This function sends the currently rendered image to the VGA card.
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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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gl_putbox( 0, 0, p_vout->output.i_width,
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p_vout->output.i_height, p_pic->p->p_pixels );
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}
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/*****************************************************************************
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* SetPalette: set a 8bpp palette
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*****************************************************************************
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* TODO: support 8 bits clut (for Mach32 cards and others).
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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 = 256;
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while( i-- )
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{
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vga_setpalette( i, red[i]>>10, green[i]>>10, blue[i]>>10 );
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}
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}
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