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() */
34 #include "vlc_filter.h"
36 /*****************************************************************************
38 *****************************************************************************/
39 static int Create ( vlc_object_t * );
40 static void Destroy ( vlc_object_t * );
42 static picture_t *Filter( filter_t *, picture_t * );
44 /*****************************************************************************
46 *****************************************************************************/
48 set_description( _("Wave video filter") );
49 set_shortname( _( "Wave" ));
50 set_capability( "video filter2", 0 );
51 set_category( CAT_VIDEO );
52 set_subcategory( SUBCAT_VIDEO_VFILTER );
54 add_shortcut( "wave" );
55 set_callbacks( Create, Destroy );
58 /*****************************************************************************
59 * vout_sys_t: Distort video output method descriptor
60 *****************************************************************************
61 * This structure is part of the video output thread descriptor.
62 * It describes the Distort specific properties of an output thread.
63 *****************************************************************************/
70 /*****************************************************************************
71 * Create: allocates Distort video thread output method
72 *****************************************************************************
73 * This function allocates and initializes a Distort vout method.
74 *****************************************************************************/
75 static int Create( vlc_object_t *p_this )
77 filter_t *p_filter = (filter_t *)p_this;
79 /* Allocate structure */
80 p_filter->p_sys = malloc( sizeof( filter_sys_t ) );
81 if( p_filter->p_sys == NULL )
83 msg_Err( p_filter, "out of memory" );
87 p_filter->pf_video_filter = Filter;
89 p_filter->p_sys->f_angle = 0.0;
90 p_filter->p_sys->last_date = 0;
95 /*****************************************************************************
96 * Destroy: destroy Distort video thread output method
97 *****************************************************************************
98 * Terminate an output method created by DistortCreateOutputMethod
99 *****************************************************************************/
100 static void Destroy( vlc_object_t *p_this )
102 filter_t *p_filter = (filter_t *)p_this;
103 free( p_filter->p_sys );
106 /*****************************************************************************
107 * Render: displays previously rendered output
108 *****************************************************************************
109 * This function send the currently rendered image to Distort image, waits
110 * until it is displayed and switch the two rendering buffers, preparing next
112 *****************************************************************************/
113 static picture_t *Filter( filter_t *p_filter, picture_t *p_pic )
118 mtime_t new_date = mdate();
120 if( !p_pic ) return NULL;
122 p_outpic = p_filter->pf_vout_buffer_new( p_filter );
125 msg_Warn( p_filter, "can't get output picture" );
126 if( p_pic->pf_release )
127 p_pic->pf_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 i_visible_pixels = i_visible_pitch/i_pixel_pitch;
150 black_pixel = ( i_index == Y_PLANE ) ? 0x00 : 0x80;
152 /* Ok, we do 3 times the sin() calculation for each line. So what ? */
153 for( i_line = 0 ; i_line < i_num_lines ; i_line++ )
155 /* Calculate today's offset, don't go above 1/20th of the screen */
156 i_offset = (int)( (double)(i_visible_pixels)
157 * sin( f_angle + 10.0 * (double)i_line
158 / (double)i_num_lines )
159 / 20.0 )*i_pixel_pitch;
165 p_filter->p_libvlc->pf_memcpy( p_out, p_in - i_offset,
166 i_visible_pitch + i_offset );
167 p_in += p_pic->p[i_index].i_pitch;
168 p_out += p_outpic->p[i_index].i_pitch;
169 p_filter->p_libvlc->pf_memset( p_out + i_offset,
170 black_pixel, -i_offset );
174 p_filter->p_libvlc->pf_memcpy( p_out + i_offset, p_in,
175 i_visible_pitch - i_offset );
176 p_filter->p_libvlc->pf_memset( p_out, black_pixel,
178 p_in += p_pic->p[i_index].i_pitch;
179 p_out += p_outpic->p[i_index].i_pitch;
184 p_filter->p_libvlc->pf_memcpy( p_out, p_in,
186 p_in += p_pic->p[i_index].i_pitch;
187 p_out += p_outpic->p[i_index].i_pitch;
193 p_outpic->date = p_pic->date;
194 p_outpic->b_force = p_pic->b_force;
195 p_outpic->i_nb_fields = p_pic->i_nb_fields;
196 p_outpic->b_progressive = p_pic->b_progressive;
197 p_outpic->b_top_field_first = p_pic->b_top_field_first;
199 if( p_pic->pf_release )
200 p_pic->pf_release( p_pic );