1 /*****************************************************************************
2 * psychedelic.c : Psychedelic 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 <vlc_image.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_("Psychedelic video filter") )
55 set_shortname( N_( "Psychedelic" ))
56 set_capability( "video filter", 0 )
57 set_category( CAT_VIDEO
)
58 set_subcategory( SUBCAT_VIDEO_VFILTER
)
60 add_shortcut( "psychedelic" )
61 set_callbacks( Create
, Destroy
)
64 /*****************************************************************************
65 * filter_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 *****************************************************************************/
72 image_handler_t
*p_image
;
73 unsigned int x
, y
, scale
;
74 int xinc
, yinc
, scaleinc
;
78 /*****************************************************************************
79 * Create: allocates Distort video thread output method
80 *****************************************************************************
81 * This function allocates and initializes a Distort vout method.
82 *****************************************************************************/
83 static int Create( vlc_object_t
*p_this
)
85 filter_t
*p_filter
= (filter_t
*)p_this
;
87 const vlc_fourcc_t fourcc
= p_filter
->fmt_in
.video
.i_chroma
;
88 const vlc_chroma_description_t
*p_chroma
= vlc_fourcc_GetChromaDescription( fourcc
);
89 if( !p_chroma
|| p_chroma
->plane_count
!= 3 || p_chroma
->pixel_size
!= 1 ) {
90 msg_Err( p_filter
, "Unsupported chroma (%4.4s)", (char*)&fourcc
);
94 /* Allocate structure */
95 p_filter
->p_sys
= malloc( sizeof( filter_sys_t
) );
96 if( p_filter
->p_sys
== NULL
)
99 p_filter
->pf_video_filter
= Filter
;
101 p_filter
->p_sys
->x
= 10;
102 p_filter
->p_sys
->y
= 10;
103 p_filter
->p_sys
->scale
= 1;
104 p_filter
->p_sys
->xinc
= 1;
105 p_filter
->p_sys
->yinc
= 1;
106 p_filter
->p_sys
->scaleinc
= 1;
107 p_filter
->p_sys
->u
= 0;
108 p_filter
->p_sys
->v
= 0;
109 p_filter
->p_sys
->p_image
= NULL
;
114 /*****************************************************************************
115 * Destroy: destroy Distort video thread output method
116 *****************************************************************************
117 * Terminate an output method created by DistortCreateOutputMethod
118 *****************************************************************************/
119 static void Destroy( vlc_object_t
*p_this
)
121 filter_t
*p_filter
= (filter_t
*)p_this
;
123 if( p_filter
->p_sys
->p_image
)
124 image_HandlerDelete( p_filter
->p_sys
->p_image
);
125 p_filter
->p_sys
->p_image
= NULL
;
127 free( p_filter
->p_sys
);
130 /*****************************************************************************
131 * Render: displays previously rendered output
132 *****************************************************************************
133 * This function send the currently rendered image to Distort image, waits
134 * until it is displayed and switch the two rendering buffers, preparing next
136 *****************************************************************************/
137 static picture_t
*Filter( filter_t
*p_filter
, picture_t
*p_pic
)
144 picture_t
*p_converted
;
145 video_format_t fmt_out
;
147 if( !p_pic
) return NULL
;
149 p_outpic
= filter_NewPicture( p_filter
);
152 picture_Release( p_pic
);
156 if( !p_filter
->p_sys
->p_image
)
157 p_filter
->p_sys
->p_image
= image_HandlerCreate( p_filter
);
160 u
= p_filter
->p_sys
->u
;
161 v
= p_filter
->p_sys
->v
;
162 for( int y
= 0; y
< p_outpic
->p
[U_PLANE
].i_lines
; y
++ )
165 p_outpic
->p
[U_PLANE
].p_pixels
+y
*p_outpic
->p
[U_PLANE
].i_pitch
,
166 u
, p_outpic
->p
[U_PLANE
].i_pitch
);
168 p_outpic
->p
[V_PLANE
].p_pixels
+y
*p_outpic
->p
[V_PLANE
].i_pitch
,
169 v
, p_outpic
->p
[V_PLANE
].i_pitch
);
170 if( v
== 0 && u
!= 0 )
181 plane_CopyPixels( &p_outpic
->p
[Y_PLANE
], &p_pic
->p
[Y_PLANE
] );
183 /* image visualization */
184 fmt_out
= p_filter
->fmt_out
.video
;
185 fmt_out
.i_width
= p_filter
->fmt_out
.video
.i_width
*p_filter
->p_sys
->scale
/150;
186 fmt_out
.i_height
= p_filter
->fmt_out
.video
.i_height
*p_filter
->p_sys
->scale
/150;
187 fmt_out
.i_visible_width
= fmt_out
.i_width
;
188 fmt_out
.i_visible_height
= fmt_out
.i_height
;
189 p_converted
= image_Convert( p_filter
->p_sys
->p_image
, p_pic
,
190 &(p_pic
->format
), &fmt_out
);
194 #define copyimage( plane, b ) \
195 for( int y = 0; y<p_converted->p[plane].i_visible_lines; y++ ) { \
196 for( int x = 0; x<p_converted->p[plane].i_visible_pitch; x++ ) { \
198 if( p_filter->p_sys->yinc == 1 ) \
201 ny = p_converted->p[plane].i_visible_lines-y; \
202 if( p_filter->p_sys->xinc == 1 ) \
205 nx = p_converted->p[plane].i_visible_pitch-x; \
206 p_outpic->p[plane].p_pixels[(p_filter->p_sys->x*b+nx)+(ny+p_filter->p_sys->y*b)*p_outpic->p[plane].i_pitch ] = p_converted->p[plane].p_pixels[y*p_converted->p[plane].i_pitch+x]; \
208 copyimage( Y_PLANE
, 2 );
209 copyimage( U_PLANE
, 1 );
210 copyimage( V_PLANE
, 1 );
213 picture_Release( p_converted
);
217 msg_Err( p_filter
, "Image scaling failed miserably." );
220 p_filter
->p_sys
->x
+= p_filter
->p_sys
->xinc
;
221 p_filter
->p_sys
->y
+= p_filter
->p_sys
->yinc
;
223 p_filter
->p_sys
->scale
+= p_filter
->p_sys
->scaleinc
;
224 if( p_filter
->p_sys
->scale
>= 50 ) p_filter
->p_sys
->scaleinc
= -1;
225 if( p_filter
->p_sys
->scale
<= 1 ) p_filter
->p_sys
->scaleinc
= 1;
227 w
= p_filter
->fmt_out
.video
.i_width
*p_filter
->p_sys
->scale
/150;
228 h
= p_filter
->fmt_out
.video
.i_height
*p_filter
->p_sys
->scale
/150;
229 if( p_filter
->p_sys
->x
*2 + w
>= p_filter
->fmt_out
.video
.i_width
)
230 p_filter
->p_sys
->xinc
= -1;
231 if( p_filter
->p_sys
->x
<= 0 )
232 p_filter
->p_sys
->xinc
= 1;
234 if( p_filter
->p_sys
->x
*2 + w
>= p_filter
->fmt_out
.video
.i_width
)
235 p_filter
->p_sys
->x
= (p_filter
->fmt_out
.video
.i_width
-w
)/2;
236 if( p_filter
->p_sys
->y
*2 + h
>= p_filter
->fmt_out
.video
.i_height
)
237 p_filter
->p_sys
->y
= (p_filter
->fmt_out
.video
.i_height
-h
)/2;
239 if( p_filter
->p_sys
->y
*2 + h
>= p_filter
->fmt_out
.video
.i_height
)
240 p_filter
->p_sys
->yinc
= -1;
241 if( p_filter
->p_sys
->y
<= 0 )
242 p_filter
->p_sys
->yinc
= 1;
244 for( int y
= 0; y
< 16; y
++ )
246 if( p_filter
->p_sys
->v
== 0 && p_filter
->p_sys
->u
!= 0 )
247 p_filter
->p_sys
->u
-= 1;
248 else if( p_filter
->p_sys
->u
== 0xff )
249 p_filter
->p_sys
->v
-= 1;
250 else if( p_filter
->p_sys
->v
== 0xff )
251 p_filter
->p_sys
->u
+= 1;
252 else if( p_filter
->p_sys
->u
== 0 )
253 p_filter
->p_sys
->v
+= 1;
256 return CopyInfoAndRelease( p_outpic
, p_pic
);