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vlc/modules/video_output/caca.c

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/*****************************************************************************
* caca.c: Color ASCII Art video output plugin using libcaca
*****************************************************************************
* Copyright (C) 2003, 2004 the VideoLAN team
* $Id$
*
* 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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
/*****************************************************************************
* Preamble
*****************************************************************************/
#include <errno.h> /* ENOMEM */
#include <stdlib.h> /* free() */
#include <string.h> /* strerror() */
#include <caca.h>
#ifndef CACA_API_VERSION_1
/* Upward compatibility macros */
typedef char cucul_canvas_t;
typedef struct caca_bitmap cucul_dither_t;
typedef char caca_display_t;
# define CUCUL_COLOR_DEFAULT CACA_COLOR_LIGHTGRAY
# define CUCUL_COLOR_BLACK CACA_COLOR_BLACK
# define cucul_clear_canvas(x) caca_clear()
# define cucul_create_canvas(x,y) "" /* kinda hacky */
# define cucul_create_dither caca_create_bitmap
# define cucul_dither_bitmap(x,y,z,t,u,v,w) caca_draw_bitmap(y,z,t,u,v,w)
# define cucul_free_dither caca_free_bitmap
# define cucul_free_canvas(x)
# define cucul_get_canvas_width(x) caca_get_width()
# define cucul_get_canvas_height(x) caca_get_height()
# define cucul_set_color(x,y,z) caca_set_color(y,z)
# define caca_create_display(x) (caca_init() ? NULL : "") /* hacky, too */
# define caca_free_display(x) caca_end()
# define caca_get_event(x,y,z,t) *(z) = caca_get_event(y)
# define caca_refresh_display(x) caca_refresh()
# define caca_set_display_title(x,y) caca_set_window_title(y)
#endif
#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_shortname( "Caca" );
set_category( CAT_VIDEO );
set_subcategory( SUBCAT_VIDEO_VOUT );
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
{
cucul_canvas_t *p_cv;
caca_display_t *p_dp;
cucul_dither_t *p_dither;
};
/*****************************************************************************
* 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 )
CONSOLE_SCREEN_BUFFER_INFO csbiInfo;
SMALL_RECT rect;
COORD coord;
HANDLE hstdout;
if( !AllocConsole() )
{
msg_Err( p_vout, "cannot create console" );
return VLC_EGENERIC;
}
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 );
}
#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;
}
p_vout->p_sys->p_cv = cucul_create_canvas(0, 0);
if( !p_vout->p_sys->p_cv )
{
msg_Err( p_vout, "cannot initialize libcucul" );
free( p_vout->p_sys );
return VLC_EGENERIC;
}
p_vout->p_sys->p_dp = caca_create_display( p_vout->p_sys->p_cv );
if( !p_vout->p_sys->p_dp )
{
msg_Err( p_vout, "cannot initialize libcaca" );
cucul_free_canvas( p_vout->p_sys->p_cv );
free( p_vout->p_sys );
return VLC_EGENERIC;
}
caca_set_display_title( p_vout->p_sys->p_dp,
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 dither object */
p_vout->p_sys->p_dither = cucul_create_dither
( 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_dither )
{
msg_Err( p_vout, "could not create libcaca dither object" );
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 )
{
cucul_free_dither( p_vout->p_sys->p_dither );
}
/*****************************************************************************
* 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_free_display( p_vout->p_sys->p_dp );
cucul_free_canvas( p_vout->p_sys->p_cv );
#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 )
{
#ifdef CACA_API_VERSION_1
struct caca_event ev;
#else
int ev;
#endif
while( caca_get_event(p_vout->p_sys->p_dp, CACA_EVENT_ANY, &ev, 0) )
{
playlist_t *p_playlist;
vlc_value_t val;
#ifdef CACA_API_VERSION_1
switch( ev.type )
#else
switch( ev )
#endif
{
case CACA_EVENT_KEY_RELEASE:
#ifdef CACA_API_VERSION_1
switch( ev.data.key.ch )
#else
switch( ev & 0x00ffffff )
#endif
{
case 'q':
val.i_int = KEY_MODIFIER_CTRL | 'q';
break;
case ' ':
val.i_int = KEY_SPACE;
break;
default:
continue;
}
var_Set( p_vout->p_libvlc, "key-pressed", val );
break;
case CACA_EVENT_RESIZE:
/* Acknowledge the resize */
caca_refresh_display( p_vout->p_sys->p_dp );
break;
#ifdef CACA_API_VERSION_1
case CACA_EVENT_MOUSE_MOTION:
val.i_int = ev.data.mouse.x * p_vout->render.i_width
/ cucul_get_canvas_width( p_vout->p_sys->p_cv );
var_Set( p_vout, "mouse-x", val );
val.i_int = ev.data.mouse.y * p_vout->render.i_height
/ cucul_get_canvas_height( p_vout->p_sys->p_cv );
var_Set( p_vout, "mouse-y", val );
val.b_bool = VLC_TRUE;
var_Set( p_vout, "mouse-moved", val );
break;
case CACA_EVENT_MOUSE_RELEASE:
val.b_bool = VLC_TRUE;
var_Set( p_vout, "mouse-clicked", val );
break;
case CACA_EVENT_QUIT:
{
p_playlist = vlc_object_find( p_vout,
VLC_OBJECT_PLAYLIST, FIND_ANYWHERE );
if( p_playlist )
{
playlist_Stop( p_playlist );
vlc_object_release( p_playlist );
}
p_vout->p_libvlc->b_die = VLC_TRUE;
break;
}
#endif
default:
break;
}
}
return VLC_SUCCESS;
}
/*****************************************************************************
* Render: render previously calculated output
*****************************************************************************/
static void Render( vout_thread_t *p_vout, picture_t *p_pic )
{
cucul_set_color( p_vout->p_sys->p_cv,
CUCUL_COLOR_DEFAULT, CUCUL_COLOR_BLACK );
cucul_clear_canvas( p_vout->p_sys->p_cv );
cucul_dither_bitmap( p_vout->p_sys->p_cv, 0, 0,
cucul_get_canvas_width( p_vout->p_sys->p_cv ) - 1,
cucul_get_canvas_height( p_vout->p_sys->p_cv ) - 1,
p_vout->p_sys->p_dither, p_pic->p->p_pixels );
}
/*****************************************************************************
* Display: displays previously rendered output
*****************************************************************************/
static void Display( vout_thread_t *p_vout, picture_t *p_pic )
{
caca_refresh_display( p_vout->p_sys->p_dp );
}
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