1
/*****************************************************************************
2
* wave.c : Wave video effect plugin for vlc
3
*****************************************************************************
4
* Copyright (C) 2000-2008 the VideoLAN team
7
* Authors: Samuel Hocevar <sam@zoy.org>
8
* Antoine Cellerier <dionoea -at- videolan -dot- org>
10
* This program is free software; you can redistribute it and/or modify
11
* it under the terms of the GNU General Public License as published by
12
* the Free Software Foundation; either version 2 of the License, or
13
* (at your option) any later version.
15
* This program is distributed in the hope that it will be useful,
16
* but WITHOUT ANY WARRANTY; without even the implied warranty of
17
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18
* GNU General Public License for more details.
20
* You should have received a copy of the GNU General Public License
21
* along with this program; if not, write to the Free Software
22
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
23
*****************************************************************************/
25
/*****************************************************************************
27
*****************************************************************************/
33
#include <math.h> /* sin(), cos() */
35
#include <vlc_common.h>
36
#include <vlc_plugin.h>
39
#include "vlc_filter.h"
40
#include "filter_picture.h"
42
/*****************************************************************************
44
*****************************************************************************/
45
static int Create ( vlc_object_t * );
46
static void Destroy ( vlc_object_t * );
48
static picture_t *Filter( filter_t *, picture_t * );
50
/*****************************************************************************
52
*****************************************************************************/
54
set_description( N_("Wave video filter") );
55
set_shortname( N_( "Wave" ));
56
set_capability( "video filter2", 0 );
57
set_category( CAT_VIDEO );
58
set_subcategory( SUBCAT_VIDEO_VFILTER );
60
add_shortcut( "wave" );
61
set_callbacks( Create, Destroy );
64
/*****************************************************************************
65
* vout_sys_t: Distort video output method descriptor
66
*****************************************************************************
67
* This structure is part of the video output thread descriptor.
68
* It describes the Distort specific properties of an output thread.
69
*****************************************************************************/
76
/*****************************************************************************
77
* Create: allocates Distort video thread output method
78
*****************************************************************************
79
* This function allocates and initializes a Distort vout method.
80
*****************************************************************************/
81
static int Create( vlc_object_t *p_this )
83
filter_t *p_filter = (filter_t *)p_this;
85
/* Allocate structure */
86
p_filter->p_sys = malloc( sizeof( filter_sys_t ) );
87
if( p_filter->p_sys == NULL )
90
p_filter->pf_video_filter = Filter;
92
p_filter->p_sys->f_angle = 0.0;
93
p_filter->p_sys->last_date = 0;
98
/*****************************************************************************
99
* Destroy: destroy Distort video thread output method
100
*****************************************************************************
101
* Terminate an output method created by DistortCreateOutputMethod
102
*****************************************************************************/
103
static void Destroy( vlc_object_t *p_this )
105
filter_t *p_filter = (filter_t *)p_this;
106
free( p_filter->p_sys );
109
/*****************************************************************************
110
* Render: displays previously rendered output
111
*****************************************************************************
112
* This function send the currently rendered image to Distort image, waits
113
* until it is displayed and switch the two rendering buffers, preparing next
115
*****************************************************************************/
116
static picture_t *Filter( filter_t *p_filter, picture_t *p_pic )
121
mtime_t new_date = mdate();
123
if( !p_pic ) return NULL;
125
p_outpic = filter_NewPicture( p_filter );
128
picture_Release( p_pic );
132
p_filter->p_sys->f_angle += (new_date - p_filter->p_sys->last_date) / 200000.0;
133
p_filter->p_sys->last_date = new_date;
134
f_angle = p_filter->p_sys->f_angle;
136
for( i_index = 0 ; i_index < p_pic->i_planes ; i_index++ )
138
int i_line, i_num_lines, i_visible_pitch, i_pixel_pitch, i_offset,
141
uint8_t *p_in, *p_out;
143
p_in = p_pic->p[i_index].p_pixels;
144
p_out = p_outpic->p[i_index].p_pixels;
146
i_num_lines = p_pic->p[i_index].i_visible_lines;
147
i_visible_pitch = p_pic->p[i_index].i_visible_pitch;
148
i_pixel_pitch = p_pic->p[i_index].i_pixel_pitch;
149
i_visible_pixels = i_visible_pitch/i_pixel_pitch;
151
black_pixel = ( p_pic->i_planes > 1 && i_index == Y_PLANE ) ? 0x00
154
/* Ok, we do 3 times the sin() calculation for each line. So what ? */
155
for( i_line = 0 ; i_line < i_num_lines ; i_line++ )
157
/* Calculate today's offset, don't go above 1/20th of the screen */
158
i_offset = (int)( (double)(i_visible_pixels)
159
* sin( f_angle + 10.0 * (double)i_line
160
/ (double)i_num_lines )
161
/ 20.0 )*i_pixel_pitch;
167
vlc_memcpy( p_out, p_in - i_offset,
168
i_visible_pitch + i_offset );
169
p_in += p_pic->p[i_index].i_pitch;
170
p_out += p_outpic->p[i_index].i_pitch;
171
vlc_memset( p_out + i_offset, black_pixel, -i_offset );
175
vlc_memcpy( p_out + i_offset, p_in,
176
i_visible_pitch - i_offset );
177
vlc_memset( p_out, black_pixel, i_offset );
178
p_in += p_pic->p[i_index].i_pitch;
179
p_out += p_outpic->p[i_index].i_pitch;
184
vlc_memcpy( p_out, p_in, i_visible_pitch );
185
p_in += p_pic->p[i_index].i_pitch;
186
p_out += p_outpic->p[i_index].i_pitch;
192
return CopyInfoAndRelease( p_outpic, p_pic );