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>
38 #include <vlc_filter.h>
39 #include "filter_picture.h"
41 /*****************************************************************************
43 *****************************************************************************/
44 static int Create ( vlc_object_t
* );
45 static void Destroy ( vlc_object_t
* );
47 static picture_t
*Filter( filter_t
*, picture_t
* );
49 /*****************************************************************************
51 *****************************************************************************/
53 set_description( N_("Wave video filter") )
54 set_shortname( N_( "Wave" ))
55 set_capability( "video filter2", 0 )
56 set_category( CAT_VIDEO
)
57 set_subcategory( SUBCAT_VIDEO_VFILTER
)
59 add_shortcut( "wave" )
60 set_callbacks( Create
, Destroy
)
63 /*****************************************************************************
64 * filter_sys_t: Distort video output method descriptor
65 *****************************************************************************
66 * This structure is part of the video output thread descriptor.
67 * It describes the Distort specific properties of an output thread.
68 *****************************************************************************/
75 /*****************************************************************************
76 * Create: allocates Distort video thread output method
77 *****************************************************************************
78 * This function allocates and initializes a Distort vout method.
79 *****************************************************************************/
80 static int Create( vlc_object_t
*p_this
)
82 filter_t
*p_filter
= (filter_t
*)p_this
;
84 /* Allocate structure */
85 p_filter
->p_sys
= malloc( sizeof( filter_sys_t
) );
86 if( p_filter
->p_sys
== NULL
)
89 p_filter
->pf_video_filter
= Filter
;
91 p_filter
->p_sys
->f_angle
= 0.0;
92 p_filter
->p_sys
->last_date
= 0;
97 /*****************************************************************************
98 * Destroy: destroy Distort video thread output method
99 *****************************************************************************
100 * Terminate an output method created by DistortCreateOutputMethod
101 *****************************************************************************/
102 static void Destroy( vlc_object_t
*p_this
)
104 filter_t
*p_filter
= (filter_t
*)p_this
;
105 free( p_filter
->p_sys
);
108 /*****************************************************************************
109 * Render: displays previously rendered output
110 *****************************************************************************
111 * This function send the currently rendered image to Distort image, waits
112 * until it is displayed and switch the two rendering buffers, preparing next
114 *****************************************************************************/
115 static picture_t
*Filter( filter_t
*p_filter
, picture_t
*p_pic
)
120 mtime_t new_date
= mdate();
122 if( !p_pic
) return NULL
;
124 p_outpic
= filter_NewPicture( p_filter
);
127 picture_Release( p_pic
);
131 p_filter
->p_sys
->f_angle
+= (new_date
- p_filter
->p_sys
->last_date
) / 200000.0;
132 p_filter
->p_sys
->last_date
= new_date
;
133 f_angle
= p_filter
->p_sys
->f_angle
;
135 for( i_index
= 0 ; i_index
< p_pic
->i_planes
; i_index
++ )
137 int i_line
, i_num_lines
, i_visible_pitch
, i_pixel_pitch
, i_offset
,
140 uint8_t *p_in
, *p_out
;
142 p_in
= p_pic
->p
[i_index
].p_pixels
;
143 p_out
= p_outpic
->p
[i_index
].p_pixels
;
145 i_num_lines
= p_pic
->p
[i_index
].i_visible_lines
;
146 i_visible_pitch
= p_pic
->p
[i_index
].i_visible_pitch
;
147 i_pixel_pitch
= p_pic
->p
[i_index
].i_pixel_pitch
;
148 switch( p_filter
->fmt_in
.video
.i_chroma
)
151 // Quick hack to fix u/v inversion occuring with 2 byte pixel pitch
155 i_visible_pixels
= i_visible_pitch
/i_pixel_pitch
;
157 black_pixel
= ( p_pic
->i_planes
> 1 && i_index
== Y_PLANE
) ? 0x00
160 /* Ok, we do 3 times the sin() calculation for each line. So what ? */
161 for( i_line
= 0 ; i_line
< i_num_lines
; i_line
++ )
163 /* Calculate today's offset, don't go above 1/20th of the screen */
164 i_offset
= (int)( (double)(i_visible_pixels
)
165 * sin( f_angle
+ 10.0 * (double)i_line
166 / (double)i_num_lines
)
167 / 20.0 )*i_pixel_pitch
;
173 vlc_memcpy( p_out
, p_in
- i_offset
,
174 i_visible_pitch
+ i_offset
);
175 p_in
+= p_pic
->p
[i_index
].i_pitch
;
176 p_out
+= p_outpic
->p
[i_index
].i_pitch
;
177 vlc_memset( p_out
+ i_offset
, black_pixel
, -i_offset
);
181 vlc_memcpy( p_out
+ i_offset
, p_in
,
182 i_visible_pitch
- i_offset
);
183 vlc_memset( p_out
, black_pixel
, i_offset
);
184 p_in
+= p_pic
->p
[i_index
].i_pitch
;
185 p_out
+= p_outpic
->p
[i_index
].i_pitch
;
190 vlc_memcpy( p_out
, p_in
, i_visible_pitch
);
191 p_in
+= p_pic
->p
[i_index
].i_pitch
;
192 p_out
+= p_outpic
->p
[i_index
].i_pitch
;
198 return CopyInfoAndRelease( p_outpic
, p_pic
);