caca.c
上传用户:riyaled888
上传日期:2009-03-27
资源大小:7338k
文件大小:10k
- /*****************************************************************************
- * caca.c: Color ASCII Art video output plugin using libcaca
- *****************************************************************************
- * Copyright (C) 2003, 2004 VideoLAN
- * $Id: caca.c 8551 2004-08-28 17:36:02Z gbazin $
- *
- * Authors: Sam Hocevar <sam@zoy.org>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
- *****************************************************************************/
- /*****************************************************************************
- * Preamble
- *****************************************************************************/
- #include <errno.h> /* ENOMEM */
- #include <stdlib.h> /* free() */
- #include <string.h> /* strerror() */
- #include <caca.h>
- #include <vlc/vlc.h>
- #include <vlc/vout.h>
- #include <vlc/intf.h>
- #include <vlc_keys.h>
- /*****************************************************************************
- * Local prototypes
- *****************************************************************************/
- static int Create ( vlc_object_t * );
- static void Destroy ( vlc_object_t * );
- static int Init ( vout_thread_t * );
- static void End ( vout_thread_t * );
- static int Manage ( vout_thread_t * );
- static void Render ( vout_thread_t *, picture_t * );
- static void Display ( vout_thread_t *, picture_t * );
- /*****************************************************************************
- * Module descriptor
- *****************************************************************************/
- vlc_module_begin();
- set_description( _("color ASCII art video output") );
- set_capability( "video output", 12 );
- set_callbacks( Create, Destroy );
- vlc_module_end();
- /*****************************************************************************
- * vout_sys_t: libcaca video output method descriptor
- *****************************************************************************
- * This structure is part of the video output thread descriptor.
- * It describes the libcaca specific properties of an output thread.
- *****************************************************************************/
- struct vout_sys_t
- {
- struct caca_bitmap *p_bitmap;
- };
- /*****************************************************************************
- * Create: allocates libcaca video output thread
- *****************************************************************************
- * This function initializes libcaca vout method.
- *****************************************************************************/
- static int Create( vlc_object_t *p_this )
- {
- vout_thread_t *p_vout = (vout_thread_t *)p_this;
- #if defined( WIN32 ) && !defined( UNDER_CE )
- if( AllocConsole() )
- {
- CONSOLE_SCREEN_BUFFER_INFO csbiInfo;
- SMALL_RECT rect;
- COORD coord;
- HANDLE hstdout =
- CreateConsoleScreenBuffer( GENERIC_READ | GENERIC_WRITE,
- FILE_SHARE_READ | FILE_SHARE_WRITE,
- NULL, CONSOLE_TEXTMODE_BUFFER, NULL );
- if( !hstdout || hstdout == INVALID_HANDLE_VALUE )
- {
- msg_Err( p_vout, "cannot create screen buffer" );
- FreeConsole();
- return VLC_EGENERIC;
- }
- if( !SetConsoleActiveScreenBuffer( hstdout) )
- {
- msg_Err( p_vout, "cannot set active screen buffer" );
- FreeConsole();
- return VLC_EGENERIC;
- }
- coord = GetLargestConsoleWindowSize( hstdout );
- msg_Dbg( p_vout, "SetConsoleWindowInfo: %ix%i", coord.X, coord.Y );
- /* Force size for now */
- coord.X = 100;
- coord.Y = 40;
- if( !SetConsoleScreenBufferSize( hstdout, coord ) )
- msg_Warn( p_vout, "SetConsoleScreenBufferSize %i %i",
- coord.X, coord.Y );
- /* Get the current screen buffer size and window position. */
- if( GetConsoleScreenBufferInfo( hstdout, &csbiInfo ) )
- {
- rect.Top = 0; rect.Left = 0;
- rect.Right = csbiInfo.dwMaximumWindowSize.X - 1;
- rect.Bottom = csbiInfo.dwMaximumWindowSize.Y - 1;
- if( !SetConsoleWindowInfo( hstdout, TRUE, &rect ) )
- msg_Dbg( p_vout, "SetConsoleWindowInfo failed: %ix%i",
- rect.Right, rect.Bottom );
- }
- }
- else
- {
- msg_Err( p_vout, "cannot create console" );
- return VLC_EGENERIC;
- }
- #endif
- /* Allocate structure */
- p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
- if( p_vout->p_sys == NULL )
- {
- msg_Err( p_vout, "out of memory" );
- return VLC_ENOMEM;
- }
- if( caca_init() )
- {
- msg_Err( p_vout, "cannot initialize libcaca" );
- free( p_vout->p_sys );
- return VLC_EGENERIC;
- }
- caca_set_window_title( VOUT_TITLE " - Colour AsCii Art (caca)" );
- p_vout->pf_init = Init;
- p_vout->pf_end = End;
- p_vout->pf_manage = Manage;
- p_vout->pf_render = Render;
- p_vout->pf_display = Display;
- return VLC_SUCCESS;
- }
- /*****************************************************************************
- * Init: initialize libcaca video output thread
- *****************************************************************************/
- static int Init( vout_thread_t *p_vout )
- {
- int i_index;
- picture_t *p_pic = NULL;
- I_OUTPUTPICTURES = 0;
- p_vout->output.i_chroma = VLC_FOURCC('R','V','3','2');
- p_vout->output.i_width = p_vout->render.i_width;
- p_vout->output.i_height = p_vout->render.i_height;
- p_vout->output.i_aspect = p_vout->render.i_aspect;
- p_vout->output.i_rmask = 0x00ff0000;
- p_vout->output.i_gmask = 0x0000ff00;
- p_vout->output.i_bmask = 0x000000ff;
- /* Create the libcaca bitmap */
- p_vout->p_sys->p_bitmap =
- caca_create_bitmap( 32,
- p_vout->output.i_width,
- p_vout->output.i_height,
- 4 * ((p_vout->output.i_width + 15) & ~15),
- p_vout->output.i_rmask,
- p_vout->output.i_gmask,
- p_vout->output.i_bmask,
- 0x00000000 );
- if( !p_vout->p_sys->p_bitmap )
- {
- msg_Err( p_vout, "could not create libcaca bitmap" );
- return VLC_EGENERIC;
- }
- /* Find an empty picture slot */
- for( i_index = 0 ; i_index < VOUT_MAX_PICTURES ; i_index++ )
- {
- if( p_vout->p_picture[ i_index ].i_status == FREE_PICTURE )
- {
- p_pic = p_vout->p_picture + i_index;
- break;
- }
- }
- if( p_pic == NULL )
- {
- return VLC_EGENERIC;
- }
- /* Allocate the picture */
- p_pic->p->i_lines = p_vout->output.i_height;
- p_pic->p->i_visible_lines = p_vout->output.i_height;
- p_pic->p->i_pitch = 4 * ((p_vout->output.i_width + 15) & ~15);
- p_pic->p->i_pixel_pitch = 4;
- p_pic->p->i_visible_pitch = 4 * p_vout->output.i_width;
- p_pic->i_planes = 1;
- p_pic->p->p_pixels = malloc( p_pic->p->i_pitch * p_pic->p->i_lines );
- p_pic->i_status = DESTROYED_PICTURE;
- p_pic->i_type = DIRECT_PICTURE;
- PP_OUTPUTPICTURE[ I_OUTPUTPICTURES ] = p_pic;
- I_OUTPUTPICTURES++;
- return VLC_SUCCESS;
- }
- /*****************************************************************************
- * End: terminate libcaca video output thread
- *****************************************************************************/
- static void End( vout_thread_t *p_vout )
- {
- caca_free_bitmap( p_vout->p_sys->p_bitmap );
- }
- /*****************************************************************************
- * Destroy: destroy libcaca video output thread
- *****************************************************************************
- * Terminate an output method created by AaCreateOutputMethod
- *****************************************************************************/
- static void Destroy( vlc_object_t *p_this )
- {
- vout_thread_t *p_vout = (vout_thread_t *)p_this;
- caca_end();
- #if defined( WIN32 ) && !defined( UNDER_CE )
- FreeConsole();
- #endif
- free( p_vout->p_sys );
- }
- /*****************************************************************************
- * Manage: handle libcaca events
- *****************************************************************************
- * This function should be called regularly by video output thread. It manages
- * console events. It returns a non null value on error.
- *****************************************************************************/
- static int Manage( vout_thread_t *p_vout )
- {
- int event;
- vlc_value_t val;
- while(( event = caca_get_event(CACA_EVENT_KEY_PRESS | CACA_EVENT_RESIZE) ))
- {
- if( event == CACA_EVENT_RESIZE )
- {
- /* Acknowledge the resize */
- caca_refresh();
- continue;
- }
- switch( event & 0x00ffffff )
- {
- case 'q':
- val.i_int = KEY_MODIFIER_CTRL | 'q';
- break;
- case ' ':
- val.i_int = KEY_SPACE;
- break;
- default:
- continue;
- }
- var_Set( p_vout->p_vlc, "key-pressed", val );
- }
- return VLC_SUCCESS;
- }
- /*****************************************************************************
- * Render: render previously calculated output
- *****************************************************************************/
- static void Render( vout_thread_t *p_vout, picture_t *p_pic )
- {
- caca_clear();
- caca_draw_bitmap( 0, 0, caca_get_width() - 1, caca_get_height() - 1,
- p_vout->p_sys->p_bitmap, p_pic->p->p_pixels );
- }
- /*****************************************************************************
- * Display: displays previously rendered output
- *****************************************************************************/
- static void Display( vout_thread_t *p_vout, picture_t *p_pic )
- {
- caca_refresh();
- }