1 /*****************************************************************************
2 * ripple.c : Ripple video effect plugin for vlc
3 *****************************************************************************
4 * Copyright (C) 2000-2006 VLC authors and VideoLAN
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 it
11 * under the terms of the GNU Lesser General Public License as published by
12 * the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
20 * You should have received a copy of the GNU Lesser General Public License
21 * along with this program; if not, write to the Free Software Foundation,
22 * 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>
37 #include <vlc_filter.h>
38 #include <vlc_picture.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_("Ripple video filter") )
54 set_shortname( N_( "Ripple" ))
55 set_capability( "video filter", 0 )
56 set_category( CAT_VIDEO
)
57 set_subcategory( SUBCAT_VIDEO_VFILTER
)
59 add_shortcut( "ripple" )
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 const vlc_chroma_description_t
*p_chroma
=
85 vlc_fourcc_GetChromaDescription( p_filter
->fmt_in
.video
.i_chroma
);
86 if( p_chroma
== NULL
|| p_chroma
->plane_count
== 0 )
89 /* Allocate structure */
90 p_filter
->p_sys
= malloc( sizeof( filter_sys_t
) );
91 if( p_filter
->p_sys
== NULL
)
94 p_filter
->pf_video_filter
= Filter
;
96 p_filter
->p_sys
->f_angle
= 0.0;
97 p_filter
->p_sys
->last_date
= 0;
102 /*****************************************************************************
103 * Destroy: destroy Distort video thread output method
104 *****************************************************************************
105 * Terminate an output method created by DistortCreateOutputMethod
106 *****************************************************************************/
107 static void Destroy( vlc_object_t
*p_this
)
109 filter_t
*p_filter
= (filter_t
*)p_this
;
110 free( p_filter
->p_sys
);
113 /*****************************************************************************
114 * Render: displays previously rendered output
115 *****************************************************************************
116 * This function send the currently rendered image to Distort image, waits
117 * until it is displayed and switch the two rendering buffers, preparing next
119 *****************************************************************************/
120 static picture_t
*Filter( filter_t
*p_filter
, picture_t
*p_pic
)
124 mtime_t new_date
= mdate();
126 if( !p_pic
) return NULL
;
128 p_outpic
= filter_NewPicture( p_filter
);
131 picture_Release( p_pic
);
135 p_filter
->p_sys
->f_angle
-= (p_filter
->p_sys
->last_date
- new_date
) / 100000.0;
136 p_filter
->p_sys
->last_date
= new_date
;
137 f_angle
= p_filter
->p_sys
->f_angle
;
139 for( int i_index
= 0; i_index
< p_pic
->i_planes
; i_index
++ )
141 int i_first_line
, i_num_lines
, i_offset
, i_pixel_pitch
,
144 uint8_t *p_in
, *p_out
;
146 black_pixel
= ( p_pic
->i_planes
> 1 && i_index
== Y_PLANE
) ? 0x00
149 i_num_lines
= p_pic
->p
[i_index
].i_visible_lines
;
150 i_pixel_pitch
= p_pic
->p
[i_index
].i_pixel_pitch
;
151 switch( p_filter
->fmt_in
.video
.i_chroma
)
154 // Quick hack to fix u/v inversion occuring with 2 byte pixel pitch
159 i_visible_pixels
= p_pic
->p
[i_index
].i_visible_pitch
/i_pixel_pitch
;
161 i_first_line
= i_num_lines
* 4 / 5;
163 p_in
= p_pic
->p
[i_index
].p_pixels
;
164 p_out
= p_outpic
->p
[i_index
].p_pixels
;
166 for( int i_line
= 0; i_line
< i_first_line
; i_line
++ )
168 memcpy( p_out
, p_in
, p_pic
->p
[i_index
].i_visible_pitch
);
169 p_in
+= p_pic
->p
[i_index
].i_pitch
;
170 p_out
+= p_outpic
->p
[i_index
].i_pitch
;
173 /* Ok, we do 3 times the sin() calculation for each line. So what ? */
174 for( int i_line
= i_first_line
; i_line
< i_num_lines
; i_line
++ )
176 /* Calculate today's offset, don't go above 1/20th of the screen */
177 i_offset
= (int)( (double)(i_visible_pixels
)
178 * sin( f_angle
+ 2.0 * (double)i_line
179 / (double)( 1 + i_line
181 * (double)(i_line
- i_first_line
)
182 / (double)i_num_lines
183 / 8.0 )*i_pixel_pitch
;
189 memcpy( p_out
, p_in
- i_offset
,
190 p_pic
->p
[i_index
].i_visible_pitch
+ i_offset
);
191 p_in
-= p_pic
->p
[i_index
].i_pitch
;
192 p_out
+= p_outpic
->p
[i_index
].i_pitch
;
193 memset( p_out
+ i_offset
, black_pixel
, -i_offset
);
197 memcpy( p_out
+ i_offset
, p_in
,
198 p_pic
->p
[i_index
].i_visible_pitch
- i_offset
);
199 memset( p_out
, black_pixel
, i_offset
);
200 p_in
-= p_pic
->p
[i_index
].i_pitch
;
201 p_out
+= p_outpic
->p
[i_index
].i_pitch
;
206 memcpy( p_out
, p_in
, p_pic
->p
[i_index
].i_visible_pitch
);
207 p_in
-= p_pic
->p
[i_index
].i_pitch
;
208 p_out
+= p_outpic
->p
[i_index
].i_pitch
;
214 return CopyInfoAndRelease( p_outpic
, p_pic
);