1 /*****************************************************************************
2 * Psychedelic.c : Psychedelic video effect plugin for vlc
3 *****************************************************************************
4 * Copyright (C) 2000-2006 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 *****************************************************************************/
28 #include <stdlib.h> /* malloc(), free() */
31 #include <math.h> /* sin(), cos() */
34 #include <vlc/decoder.h>
36 #include "vlc_filter.h"
37 #include "vlc_image.h"
39 /*****************************************************************************
41 *****************************************************************************/
42 static int Create ( vlc_object_t * );
43 static void Destroy ( vlc_object_t * );
45 static picture_t *Filter( filter_t *, picture_t * );
47 /*****************************************************************************
49 *****************************************************************************/
51 set_description( _("Psychedelic video filter") );
52 set_shortname( N_( "Psychedelic" ));
53 set_capability( "video filter2", 0 );
54 set_category( CAT_VIDEO );
55 set_subcategory( SUBCAT_VIDEO_VFILTER );
57 add_shortcut( "psychedelic" );
58 set_callbacks( Create, Destroy );
61 /*****************************************************************************
62 * vout_sys_t: Distort video output method descriptor
63 *****************************************************************************
64 * This structure is part of the video output thread descriptor.
65 * It describes the Distort specific properties of an output thread.
66 *****************************************************************************/
69 image_handler_t *p_image;
70 unsigned int x, y, scale;
71 int xinc, yinc, scaleinc;
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 )
88 msg_Err( p_filter, "out of memory" );
92 p_filter->pf_video_filter = Filter;
94 p_filter->p_sys->x = 10;
95 p_filter->p_sys->y = 10;
96 p_filter->p_sys->scale = 1;
97 p_filter->p_sys->xinc = 1;
98 p_filter->p_sys->yinc = 1;
99 p_filter->p_sys->scaleinc = 1;
100 p_filter->p_sys->u = 0;
101 p_filter->p_sys->v = 0;
102 p_filter->p_sys->p_image = NULL;
107 /*****************************************************************************
108 * Destroy: destroy Distort video thread output method
109 *****************************************************************************
110 * Terminate an output method created by DistortCreateOutputMethod
111 *****************************************************************************/
112 static void Destroy( vlc_object_t *p_this )
114 filter_t *p_filter = (filter_t *)p_this;
116 if( p_filter->p_sys->p_image )
117 image_HandlerDelete( p_filter->p_sys->p_image );
118 p_filter->p_sys->p_image = NULL;
120 free( p_filter->p_sys );
123 /*****************************************************************************
124 * Render: displays previously rendered output
125 *****************************************************************************
126 * This function send the currently rendered image to Distort image, waits
127 * until it is displayed and switch the two rendering buffers, preparing next
129 *****************************************************************************/
130 static picture_t *Filter( filter_t *p_filter, picture_t *p_pic )
138 picture_t *p_converted;
139 video_format_t fmt_out = {0};
140 fmt_out.p_palette = NULL;
142 if( !p_pic ) return NULL;
144 p_outpic = p_filter->pf_vout_buffer_new( p_filter );
147 msg_Warn( p_filter, "can't get output picture" );
148 if( p_pic->pf_release )
149 p_pic->pf_release( p_pic );
153 if( !p_filter->p_sys->p_image )
154 p_filter->p_sys->p_image = image_HandlerCreate( p_filter );
157 u = p_filter->p_sys->u;
158 v = p_filter->p_sys->v;
159 for( y = 0; y<p_outpic->p[U_PLANE].i_lines; y++)
161 memset( p_outpic->p[U_PLANE].p_pixels+y*p_outpic->p[U_PLANE].i_pitch,
162 u, p_outpic->p[U_PLANE].i_pitch );
163 memset( p_outpic->p[V_PLANE].p_pixels+y*p_outpic->p[V_PLANE].i_pitch,
164 v, p_outpic->p[V_PLANE].i_pitch );
165 if( v == 0 && u != 0 )
176 p_filter->p_vlc->pf_memcpy(
177 p_outpic->p[Y_PLANE].p_pixels, p_pic->p[Y_PLANE].p_pixels,
178 p_outpic->p[Y_PLANE].i_lines * p_outpic->p[Y_PLANE].i_pitch );
180 /* image visualization */
181 fmt_out = p_filter->fmt_out.video;
182 fmt_out.i_width = p_filter->fmt_out.video.i_width*p_filter->p_sys->scale/150;
183 fmt_out.i_height = p_filter->fmt_out.video.i_height*p_filter->p_sys->scale/150;
184 p_converted = image_Convert( p_filter->p_sys->p_image, p_pic,
185 &(p_pic->format), &fmt_out );
187 #define copyimage( plane, b ) \
188 for( y=0; y<p_converted->p[plane].i_visible_lines; y++) { \
189 for( x=0; x<p_converted->p[plane].i_visible_pitch; x++) { \
191 if( p_filter->p_sys->yinc == 1 ) \
194 ny = p_converted->p[plane].i_visible_lines-y; \
195 if( p_filter->p_sys->xinc == 1 ) \
198 nx = p_converted->p[plane].i_visible_pitch-x; \
199 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]; \
201 copyimage( Y_PLANE, 2 );
202 copyimage( U_PLANE, 1 );
203 copyimage( V_PLANE, 1 );
206 p_converted->pf_release( p_converted );
208 p_filter->p_sys->x += p_filter->p_sys->xinc;
209 p_filter->p_sys->y += p_filter->p_sys->yinc;
211 p_filter->p_sys->scale += p_filter->p_sys->scaleinc;
212 if( p_filter->p_sys->scale >= 50 ) p_filter->p_sys->scaleinc = -1;
213 if( p_filter->p_sys->scale <= 1 ) p_filter->p_sys->scaleinc = 1;
215 w = p_filter->fmt_out.video.i_width*p_filter->p_sys->scale/150;
216 h = p_filter->fmt_out.video.i_height*p_filter->p_sys->scale/150;
217 if( p_filter->p_sys->x*2 + w >= p_filter->fmt_out.video.i_width )
218 p_filter->p_sys->xinc = -1;
219 if( p_filter->p_sys->x <= 0 )
220 p_filter->p_sys->xinc = 1;
222 if( p_filter->p_sys->x*2 + w >= p_filter->fmt_out.video.i_width )
223 p_filter->p_sys->x = (p_filter->fmt_out.video.i_width-w)/2;
224 if( p_filter->p_sys->y*2 + h >= p_filter->fmt_out.video.i_height )
225 p_filter->p_sys->y = (p_filter->fmt_out.video.i_height-h)/2;
227 if( p_filter->p_sys->y*2 + h >= p_filter->fmt_out.video.i_height )
228 p_filter->p_sys->yinc = -1;
229 if( p_filter->p_sys->y <= 0 )
230 p_filter->p_sys->yinc = 1;
232 for( y = 0; y< 16; y++ )
234 if( p_filter->p_sys->v == 0 && p_filter->p_sys->u != 0 )
235 p_filter->p_sys->u -= 1;
236 else if( p_filter->p_sys->u == 0xff )
237 p_filter->p_sys->v -= 1;
238 else if( p_filter->p_sys->v == 0xff )
239 p_filter->p_sys->u += 1;
240 else if( p_filter->p_sys->u == 0 )
241 p_filter->p_sys->v += 1;
244 p_outpic->date = p_pic->date;
245 p_outpic->b_force = p_pic->b_force;
246 p_outpic->i_nb_fields = p_pic->i_nb_fields;
247 p_outpic->b_progressive = p_pic->b_progressive;
248 p_outpic->b_top_field_first = p_pic->b_top_field_first;
250 if( p_pic->pf_release )
251 p_pic->pf_release( p_pic );