1 /*****************************************************************************
2 * wave.c : Wave 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 *****************************************************************************/
29 #include <math.h> /* sin(), cos() */
38 #include "vlc_filter.h"
40 /*****************************************************************************
42 *****************************************************************************/
43 static int Create ( vlc_object_t * );
44 static void Destroy ( vlc_object_t * );
46 static picture_t *Filter( filter_t *, picture_t * );
48 /*****************************************************************************
50 *****************************************************************************/
52 set_description( _("Wave video filter") );
53 set_shortname( _( "Wave" ));
54 set_capability( "video filter2", 0 );
55 set_category( CAT_VIDEO );
56 set_subcategory( SUBCAT_VIDEO_VFILTER );
58 add_shortcut( "wave" );
59 set_callbacks( Create, Destroy );
62 /*****************************************************************************
63 * vout_sys_t: Distort video output method descriptor
64 *****************************************************************************
65 * This structure is part of the video output thread descriptor.
66 * It describes the Distort specific properties of an output thread.
67 *****************************************************************************/
74 /*****************************************************************************
75 * Create: allocates Distort video thread output method
76 *****************************************************************************
77 * This function allocates and initializes a Distort vout method.
78 *****************************************************************************/
79 static int Create( vlc_object_t *p_this )
81 filter_t *p_filter = (filter_t *)p_this;
83 /* Allocate structure */
84 p_filter->p_sys = malloc( sizeof( filter_sys_t ) );
85 if( p_filter->p_sys == NULL )
87 msg_Err( p_filter, "out of memory" );
91 p_filter->pf_video_filter = Filter;
93 p_filter->p_sys->f_angle = 0.0;
94 p_filter->p_sys->last_date = 0;
99 /*****************************************************************************
100 * Destroy: destroy Distort video thread output method
101 *****************************************************************************
102 * Terminate an output method created by DistortCreateOutputMethod
103 *****************************************************************************/
104 static void Destroy( vlc_object_t *p_this )
106 filter_t *p_filter = (filter_t *)p_this;
107 free( p_filter->p_sys );
110 /*****************************************************************************
111 * Render: displays previously rendered output
112 *****************************************************************************
113 * This function send the currently rendered image to Distort image, waits
114 * until it is displayed and switch the two rendering buffers, preparing next
116 *****************************************************************************/
117 static picture_t *Filter( filter_t *p_filter, picture_t *p_pic )
122 mtime_t new_date = mdate();
124 if( !p_pic ) return NULL;
126 p_outpic = p_filter->pf_vout_buffer_new( p_filter );
129 msg_Warn( p_filter, "can't get output picture" );
130 if( p_pic->pf_release )
131 p_pic->pf_release( p_pic );
135 p_filter->p_sys->f_angle += (new_date - p_filter->p_sys->last_date) / 200000.0;
136 p_filter->p_sys->last_date = new_date;
137 f_angle = p_filter->p_sys->f_angle;
139 for( i_index = 0 ; i_index < p_pic->i_planes ; i_index++ )
141 int i_line, i_num_lines, i_visible_pitch, i_pixel_pitch, i_offset,
144 uint8_t *p_in, *p_out;
146 p_in = p_pic->p[i_index].p_pixels;
147 p_out = p_outpic->p[i_index].p_pixels;
149 i_num_lines = p_pic->p[i_index].i_visible_lines;
150 i_visible_pitch = p_pic->p[i_index].i_visible_pitch;
151 i_pixel_pitch = p_pic->p[i_index].i_pixel_pitch;
152 i_visible_pixels = i_visible_pitch/i_pixel_pitch;
154 black_pixel = ( i_index == Y_PLANE ) ? 0x00 : 0x80;
156 /* Ok, we do 3 times the sin() calculation for each line. So what ? */
157 for( i_line = 0 ; i_line < i_num_lines ; i_line++ )
159 /* Calculate today's offset, don't go above 1/20th of the screen */
160 i_offset = (int)( (double)(i_visible_pixels)
161 * sin( f_angle + 10.0 * (double)i_line
162 / (double)i_num_lines )
163 / 20.0 )*i_pixel_pitch;
169 p_filter->p_libvlc->pf_memcpy( p_out, p_in - i_offset,
170 i_visible_pitch + i_offset );
171 p_in += p_pic->p[i_index].i_pitch;
172 p_out += p_outpic->p[i_index].i_pitch;
173 p_filter->p_libvlc->pf_memset( p_out + i_offset,
174 black_pixel, -i_offset );
178 p_filter->p_libvlc->pf_memcpy( p_out + i_offset, p_in,
179 i_visible_pitch - i_offset );
180 p_filter->p_libvlc->pf_memset( p_out, black_pixel,
182 p_in += p_pic->p[i_index].i_pitch;
183 p_out += p_outpic->p[i_index].i_pitch;
188 p_filter->p_libvlc->pf_memcpy( p_out, p_in,
190 p_in += p_pic->p[i_index].i_pitch;
191 p_out += p_outpic->p[i_index].i_pitch;
197 p_outpic->date = p_pic->date;
198 p_outpic->b_force = p_pic->b_force;
199 p_outpic->i_nb_fields = p_pic->i_nb_fields;
200 p_outpic->b_progressive = p_pic->b_progressive;
201 p_outpic->b_top_field_first = p_pic->b_top_field_first;
203 if( p_pic->pf_release )
204 p_pic->pf_release( p_pic );