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 *****************************************************************************/
28 #include <stdlib.h> /* malloc(), free() */
31 #include <math.h> /* sin(), cos() */
34 #include <vlc/decoder.h>
36 #include "vlc_filter.h"
38 /*****************************************************************************
40 *****************************************************************************/
41 static int Create ( vlc_object_t * );
42 static void Destroy ( vlc_object_t * );
44 static picture_t *Filter( filter_t *, picture_t * );
46 /*****************************************************************************
48 *****************************************************************************/
50 set_description( _("Wave video filter") );
51 set_shortname( N_( "Wave" ));
52 set_capability( "video filter2", 0 );
53 set_category( CAT_VIDEO );
54 set_subcategory( SUBCAT_VIDEO_VFILTER2 );
56 add_shortcut( "wave" );
57 set_callbacks( Create, Destroy );
60 /*****************************************************************************
61 * vout_sys_t: Distort video output method descriptor
62 *****************************************************************************
63 * This structure is part of the video output thread descriptor.
64 * It describes the Distort specific properties of an output thread.
65 *****************************************************************************/
72 /*****************************************************************************
73 * Create: allocates Distort video thread output method
74 *****************************************************************************
75 * This function allocates and initializes a Distort vout method.
76 *****************************************************************************/
77 static int Create( vlc_object_t *p_this )
79 filter_t *p_filter = (filter_t *)p_this;
81 /* Allocate structure */
82 p_filter->p_sys = malloc( sizeof( filter_sys_t ) );
83 if( p_filter->p_sys == NULL )
85 msg_Err( p_filter, "out of memory" );
89 p_filter->pf_video_filter = Filter;
91 p_filter->p_sys->f_angle = 0.0;
92 p_filter->p_sys->last_date = 0;
97 /*****************************************************************************
98 * Destroy: destroy Distort video thread output method
99 *****************************************************************************
100 * Terminate an output method created by DistortCreateOutputMethod
101 *****************************************************************************/
102 static void Destroy( vlc_object_t *p_this )
104 filter_t *p_filter = (filter_t *)p_this;
105 free( p_filter->p_sys );
108 /*****************************************************************************
109 * Render: displays previously rendered output
110 *****************************************************************************
111 * This function send the currently rendered image to Distort image, waits
112 * until it is displayed and switch the two rendering buffers, preparing next
114 *****************************************************************************/
115 static picture_t *Filter( filter_t *p_filter, picture_t *p_pic )
120 mtime_t new_date = mdate();
122 if( !p_pic ) return NULL;
124 p_outpic = p_filter->pf_vout_buffer_new( p_filter );
127 msg_Warn( p_filter, "can't get output picture" );
128 if( p_pic->pf_release )
129 p_pic->pf_release( p_pic );
133 p_filter->p_sys->f_angle += (new_date - p_filter->p_sys->last_date) / 200000.0;
134 p_filter->p_sys->last_date = new_date;
135 f_angle = p_filter->p_sys->f_angle;
137 for( i_index = 0 ; i_index < p_pic->i_planes ; i_index++ )
139 int i_line, i_num_lines, i_offset;
141 uint8_t *p_in, *p_out;
143 p_in = p_pic->p[i_index].p_pixels;
144 p_out = p_outpic->p[i_index].p_pixels;
146 i_num_lines = p_pic->p[i_index].i_visible_lines;
148 black_pixel = ( i_index == Y_PLANE ) ? 0x00 : 0x80;
150 /* Ok, we do 3 times the sin() calculation for each line. So what ? */
151 for( i_line = 0 ; i_line < i_num_lines ; i_line++ )
153 /* Calculate today's offset, don't go above 1/20th of the screen */
154 i_offset = (int)( (double)(p_pic->p[i_index].i_visible_pitch)
155 * sin( f_angle + 10.0 * (double)i_line
156 / (double)i_num_lines )
163 p_filter->p_vlc->pf_memcpy( p_out, p_in - i_offset,
164 p_pic->p[i_index].i_visible_pitch + i_offset );
165 p_in += p_pic->p[i_index].i_pitch;
166 p_out += p_outpic->p[i_index].i_pitch;
167 memset( p_out + i_offset, black_pixel, -i_offset );
171 p_filter->p_vlc->pf_memcpy( p_out + i_offset, p_in,
172 p_pic->p[i_index].i_visible_pitch - i_offset );
173 memset( p_out, black_pixel, i_offset );
174 p_in += p_pic->p[i_index].i_pitch;
175 p_out += p_outpic->p[i_index].i_pitch;
180 p_filter->p_vlc->pf_memcpy( p_out, p_in,
181 p_pic->p[i_index].i_visible_pitch );
182 p_in += p_pic->p[i_index].i_pitch;
183 p_out += p_outpic->p[i_index].i_pitch;
189 p_outpic->date = p_pic->date;
190 p_outpic->b_force = p_pic->b_force;
191 p_outpic->i_nb_fields = p_pic->i_nb_fields;
192 p_outpic->b_progressive = p_pic->b_progressive;
193 p_outpic->b_top_field_first = p_pic->b_top_field_first;
195 if( p_pic->pf_release )
196 p_pic->pf_release( p_pic );