/*****************************************************************************
* vout_aa.c: Aa video output display method for testing purposes
*****************************************************************************
* Copyright (C) 2002 VideoLAN
* $Id: aa.c,v 1.1 2002/03/19 14:00:50 sam Exp $
*
* Authors: Sigmund Augdal <sigmunau@idi.ntnu.no>
*
* 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 <aalib.h>
#include <videolan/vlc.h>
#include "video.h"
#include "video_output.h"
#define AA_MAX_DIRECTBUFFERS 1
/*****************************************************************************
* Capabilities defined in the other files.
*****************************************************************************/
static void vout_getfunctions ( function_list_t * p_function_list );
/*****************************************************************************
* Build configuration tree.
*****************************************************************************/
MODULE_CONFIG_START
MODULE_CONFIG_STOP
MODULE_INIT_START
SET_DESCRIPTION( "ASCII-art video output module" )
ADD_CAPABILITY( VOUT, 10 )
ADD_SHORTCUT( "aa" )
ADD_SHORTCUT( "aalib" )
MODULE_INIT_STOP
MODULE_ACTIVATE_START
vout_getfunctions( &p_module->p_functions->vout );
MODULE_ACTIVATE_STOP
MODULE_DEACTIVATE_START
MODULE_DEACTIVATE_STOP
/*****************************************************************************
* vout_sys_t: aa video output method descriptor
*****************************************************************************
* This structure is part of the video output thread descriptor.
* It describes the aa specific properties of an output thread.
*****************************************************************************/
typedef struct vout_sys_s
{
struct aa_context* aa_context;
aa_palette palette;
int i_width; /* width of main window */
int i_height; /* height of main window */
} vout_sys_t;
/*****************************************************************************
* Local prototypes
*****************************************************************************/
static int vout_Create ( struct vout_thread_s * );
static int vout_Init ( struct vout_thread_s * );
static void vout_End ( struct vout_thread_s * );
static void vout_Destroy ( struct vout_thread_s * );
static int vout_Manage ( struct vout_thread_s * );
static void vout_Render ( struct vout_thread_s *, struct picture_s * );
static void vout_Display ( struct vout_thread_s *, struct picture_s * );
static int NewPicture ( struct vout_thread_s *, struct picture_s * );
static void SetPalette ( struct vout_thread_s *, u16 *, u16 *, u16 * );
/*****************************************************************************
* Functions exported as capabilities. They are declared as static so that
* we don't pollute the namespace too much.
*****************************************************************************/
static void vout_getfunctions( function_list_t * p_function_list )
{
p_function_list->functions.vout.pf_create = vout_Create;
p_function_list->functions.vout.pf_init = vout_Init;
p_function_list->functions.vout.pf_end = vout_End;
p_function_list->functions.vout.pf_destroy = vout_Destroy;
p_function_list->functions.vout.pf_manage = vout_Manage;
p_function_list->functions.vout.pf_render = vout_Render;
p_function_list->functions.vout.pf_display = vout_Display;
}
/*****************************************************************************
* vout_Create: allocates aa video thread output method
*****************************************************************************
* This function allocates and initializes a aa vout method.
*****************************************************************************/
static int vout_Create( vout_thread_t *p_vout )
{
/* Allocate structure */
p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
if( p_vout->p_sys == NULL )
{
intf_ErrMsg("error: %s", strerror(ENOMEM) );
return( 1 );
}
if (!(p_vout->p_sys->aa_context = aa_autoinit(&aa_defparams))) {
intf_ErrMsg("error: Cannot initialize AA-lib. Sorry");
return( 1 );
}
p_vout->p_sys->i_width = aa_imgwidth(p_vout->p_sys->aa_context);
p_vout->p_sys->i_height = aa_imgheight(p_vout->p_sys->aa_context);
return( 0 );
}
/*****************************************************************************
* vout_Init: initialize aa video thread output method
*****************************************************************************/
static int vout_Init( vout_thread_t *p_vout )
{
int i_index;
picture_t *p_pic;
I_OUTPUTPICTURES = 0;
p_vout->output.i_chroma = FOURCC_RGB2;
p_vout->output.i_width = p_vout->p_sys->i_width;
p_vout->output.i_height = p_vout->p_sys->i_height;
p_vout->output.i_aspect = p_vout->p_sys->i_width
* VOUT_ASPECT_FACTOR / p_vout->p_sys->i_height;
p_vout->output.pf_setpalette = SetPalette;
/* Try to initialize AA_MAX_DIRECTBUFFERS direct buffers */
while( I_OUTPUTPICTURES < AA_MAX_DIRECTBUFFERS )
{
p_pic = NULL;
/* 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;
}
}
/* Allocate the picture */
if( p_pic == NULL || NewPicture( p_vout, p_pic ) )
{
break;
}
p_pic->i_status = DESTROYED_PICTURE;
p_pic->i_type = DIRECT_PICTURE;
PP_OUTPUTPICTURE[ I_OUTPUTPICTURES ] = p_pic;
I_OUTPUTPICTURES++;
}
return( 0 );
}
/*****************************************************************************
* vout_End: terminate aa video thread output method
*****************************************************************************/
static void vout_End( vout_thread_t *p_vout )
{
;
}
/*****************************************************************************
* vout_Destroy: destroy aa video thread output method
*****************************************************************************
* Terminate an output method created by AaCreateOutputMethod
*****************************************************************************/
static void vout_Destroy( vout_thread_t *p_vout )
{
aa_close(p_vout->p_sys->aa_context);
free( p_vout->p_sys );
}
/*****************************************************************************
* vout_Manage: handle aa 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 vout_Manage( vout_thread_t *p_vout )
{
return( 0 );
}
/*****************************************************************************
* vout_Render: render previously calculated output
*****************************************************************************/
static void vout_Render( vout_thread_t *p_vout, picture_t *p_pic )
{
;
}
/*****************************************************************************
* vout_Display: displays previously rendered output
*****************************************************************************/
static void vout_Display( vout_thread_t *p_vout, picture_t *p_pic )
{
/* No need to do anything, the fake direct buffers stay as they are */
int i_width, i_height, i_x, i_y;
vout_PlacePicture( p_vout, p_vout->p_sys->i_width, p_vout->p_sys->i_height,
&i_x, &i_y, &i_width, &i_height );
// p_vout->p_sys->aa_context->imagebuffer = p_pic->p_data;
aa_fastrender(p_vout->p_sys->aa_context, 0, 0, aa_scrwidth(p_vout->p_sys->aa_context),
aa_scrheight(p_vout->p_sys->aa_context));
aa_flush(p_vout->p_sys->aa_context);
}
/*****************************************************************************
* NewPicture: allocate a picture
*****************************************************************************
* Returns 0 on success, -1 otherwise
*****************************************************************************/
static int NewPicture( vout_thread_t *p_vout, picture_t *p_pic )
{
p_pic->p->p_pixels = aa_image(p_vout->p_sys->aa_context);
p_pic->p->i_pixel_bytes = 1;
p_pic->p->i_lines = p_vout->p_sys->i_height;
p_pic->p->i_pitch = p_vout->p_sys->i_width;
p_pic->p->b_margin = 0;
p_pic->i_planes = 1;
return( 0 );
}
/*****************************************************************************
* SetPalette: set the 8bpp palette
*****************************************************************************/
static void SetPalette( vout_thread_t *p_vout, u16 *red, u16 *green, u16 *blue )
{
int i;
/* Fill colors with color information */
for( i = 0; i < 256; i++ )
{
aa_setpalette( p_vout->p_sys->palette, 256 -i,
red[ i ], green[ i ], blue[ i ] );
}
}