mirror of https://code.videolan.org/videolan/vlc
208 lines
7.6 KiB
C
208 lines
7.6 KiB
C
/*****************************************************************************
|
|
* wave.c : Wave video effect plugin for vlc
|
|
*****************************************************************************
|
|
* Copyright (C) 2000-2008 VLC authors and VideoLAN
|
|
*
|
|
* Authors: Samuel Hocevar <sam@zoy.org>
|
|
* Antoine Cellerier <dionoea -at- videolan -dot- org>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU Lesser General Public License as published by
|
|
* the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser 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
|
|
*****************************************************************************/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
# include "config.h"
|
|
#endif
|
|
|
|
#include <math.h> /* sin(), cos() */
|
|
|
|
#include <vlc_common.h>
|
|
#include <vlc_plugin.h>
|
|
#include <vlc_filter.h>
|
|
#include <vlc_picture.h>
|
|
#include "filter_picture.h"
|
|
|
|
/*****************************************************************************
|
|
* Local prototypes
|
|
*****************************************************************************/
|
|
static int Create ( vlc_object_t * );
|
|
|
|
static picture_t *Filter( filter_t *, picture_t * );
|
|
|
|
/*****************************************************************************
|
|
* Module descriptor
|
|
*****************************************************************************/
|
|
vlc_module_begin ()
|
|
set_description( N_("Wave video filter") )
|
|
set_shortname( N_( "Wave" ))
|
|
set_capability( "video filter", 0 )
|
|
set_category( CAT_VIDEO )
|
|
set_subcategory( SUBCAT_VIDEO_VFILTER )
|
|
|
|
add_shortcut( "wave" )
|
|
set_callback( Create )
|
|
vlc_module_end ()
|
|
|
|
/*****************************************************************************
|
|
* filter_sys_t: Distort video output method descriptor
|
|
*****************************************************************************
|
|
* This structure is part of the video output thread descriptor.
|
|
* It describes the Distort specific properties of an output thread.
|
|
*****************************************************************************/
|
|
typedef struct
|
|
{
|
|
double f_angle;
|
|
vlc_tick_t last_date;
|
|
} filter_sys_t;
|
|
|
|
/*****************************************************************************
|
|
* Create: allocates Distort video thread output method
|
|
*****************************************************************************
|
|
* This function allocates and initializes a Distort vout method.
|
|
*****************************************************************************/
|
|
static int Create( vlc_object_t *p_this )
|
|
{
|
|
filter_t *p_filter = (filter_t *)p_this;
|
|
|
|
const vlc_chroma_description_t *p_chroma =
|
|
vlc_fourcc_GetChromaDescription( p_filter->fmt_in.video.i_chroma );
|
|
if( p_chroma == NULL || p_chroma->plane_count == 0 )
|
|
return VLC_EGENERIC;
|
|
|
|
/* Allocate structure */
|
|
filter_sys_t *p_sys = p_filter->p_sys =
|
|
vlc_obj_malloc( p_this, sizeof(*p_sys) );
|
|
if( !p_sys )
|
|
return VLC_ENOMEM;
|
|
|
|
p_filter->pf_video_filter = Filter;
|
|
|
|
p_sys->f_angle = 0.0;
|
|
p_sys->last_date = 0;
|
|
|
|
return VLC_SUCCESS;
|
|
}
|
|
|
|
/*****************************************************************************
|
|
* Render: displays previously rendered output
|
|
*****************************************************************************
|
|
* This function send the currently rendered image to Distort image, waits
|
|
* until it is displayed and switch the two rendering buffers, preparing next
|
|
* frame.
|
|
*****************************************************************************/
|
|
static picture_t *Filter( filter_t *p_filter, picture_t *p_pic )
|
|
{
|
|
picture_t *p_outpic;
|
|
double f_angle;
|
|
vlc_tick_t new_date = vlc_tick_now();
|
|
|
|
if( !p_pic ) return NULL;
|
|
|
|
p_outpic = filter_NewPicture( p_filter );
|
|
if( !p_outpic )
|
|
{
|
|
picture_Release( p_pic );
|
|
return NULL;
|
|
}
|
|
|
|
filter_sys_t *p_sys = p_filter->p_sys;
|
|
|
|
p_sys->f_angle += 5.0f * secf_from_vlc_tick(new_date - p_sys->last_date);
|
|
p_sys->last_date = new_date;
|
|
f_angle = p_sys->f_angle;
|
|
|
|
for( int i_index = 0 ; i_index < p_pic->i_planes ; i_index++ )
|
|
{
|
|
int i_num_lines, i_visible_pitch, i_pixel_pitch, i_offset,
|
|
i_visible_pixels;
|
|
uint16_t black_pixel;
|
|
uint8_t *p_in, *p_out;
|
|
|
|
p_in = p_pic->p[i_index].p_pixels;
|
|
p_out = p_outpic->p[i_index].p_pixels;
|
|
|
|
i_num_lines = p_pic->p[i_index].i_visible_lines;
|
|
i_visible_pitch = p_pic->p[i_index].i_visible_pitch;
|
|
i_pixel_pitch = p_pic->p[i_index].i_pixel_pitch;
|
|
|
|
switch( p_filter->fmt_in.video.i_chroma )
|
|
{
|
|
CASE_PLANAR_YUV10
|
|
black_pixel = ( p_pic->i_planes > 1 && i_index == Y_PLANE ) ? 0x00
|
|
: 0x200;
|
|
break;
|
|
CASE_PACKED_YUV_422
|
|
// Quick hack to fix u/v inversion occuring with 2 byte pixel pitch
|
|
i_pixel_pitch *= 2;
|
|
/* fallthrough */
|
|
CASE_PLANAR_YUV
|
|
black_pixel = ( p_pic->i_planes > 1 && i_index == Y_PLANE ) ? 0x00
|
|
: 0x80;
|
|
break;
|
|
default:
|
|
black_pixel = 0x00;
|
|
}
|
|
|
|
i_visible_pixels = i_visible_pitch/i_pixel_pitch;
|
|
|
|
/* Ok, we do 3 times the sin() calculation for each line. So what ? */
|
|
for( int i_line = 0 ; i_line < i_num_lines ; i_line++ )
|
|
{
|
|
/* Calculate today's offset, don't go above 1/20th of the screen */
|
|
i_offset = (int)( (double)(i_visible_pixels)
|
|
* sin( f_angle + 10.0 * (double)i_line
|
|
/ (double)i_num_lines )
|
|
/ 20.0 )*i_pixel_pitch;
|
|
|
|
if( i_offset )
|
|
{
|
|
void *p_black_out;
|
|
if( i_offset < 0 )
|
|
{
|
|
memcpy( p_out, p_in - i_offset,
|
|
i_visible_pitch + i_offset );
|
|
p_black_out = &p_out[i_visible_pitch + i_offset];
|
|
i_offset = -i_offset;
|
|
}
|
|
else
|
|
{
|
|
memcpy( p_out + i_offset, p_in,
|
|
i_visible_pitch - i_offset );
|
|
p_black_out = p_out;
|
|
}
|
|
if (black_pixel > 0xFF)
|
|
{
|
|
uint16_t *p_out16 = p_black_out;
|
|
for (int x = 0; x < i_offset; x += 2)
|
|
*p_out16++ = black_pixel;
|
|
}
|
|
else
|
|
memset( p_black_out, black_pixel, i_offset );
|
|
}
|
|
else
|
|
{
|
|
memcpy( p_out, p_in, i_visible_pitch );
|
|
}
|
|
p_in += p_pic->p[i_index].i_pitch;
|
|
p_out += p_outpic->p[i_index].i_pitch;
|
|
}
|
|
}
|
|
|
|
return CopyInfoAndRelease( p_outpic, p_pic );
|
|
}
|