upnp: remove m_server_list_lock, p_server_list is already protected by s_lock
[vlc.git] / modules / video_filter / wave.c
1 /*****************************************************************************
2  * wave.c : Wave video effect plugin for vlc
3  *****************************************************************************
4  * Copyright (C) 2000-2008 VLC authors and VideoLAN
5  * $Id$
6  *
7  * Authors: Samuel Hocevar <sam@zoy.org>
8  *          Antoine Cellerier <dionoea -at- videolan -dot- org>
9  *
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.
14  *
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.
19  *
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  *****************************************************************************/
24
25 /*****************************************************************************
26  * Preamble
27  *****************************************************************************/
28
29 #ifdef HAVE_CONFIG_H
30 # include "config.h"
31 #endif
32
33 #include <math.h>                                            /* sin(), cos() */
34
35 #include <vlc_common.h>
36 #include <vlc_plugin.h>
37
38 #include <vlc_filter.h>
39 #include "filter_picture.h"
40
41 /*****************************************************************************
42  * Local prototypes
43  *****************************************************************************/
44 static int  Create    ( vlc_object_t * );
45 static void Destroy   ( vlc_object_t * );
46
47 static picture_t *Filter( filter_t *, picture_t * );
48
49 /*****************************************************************************
50  * Module descriptor
51  *****************************************************************************/
52 vlc_module_begin ()
53     set_description( N_("Wave video filter") )
54     set_shortname( N_( "Wave" ))
55     set_capability( "video filter2", 0 )
56     set_category( CAT_VIDEO )
57     set_subcategory( SUBCAT_VIDEO_VFILTER )
58
59     add_shortcut( "wave" )
60     set_callbacks( Create, Destroy )
61 vlc_module_end ()
62
63 /*****************************************************************************
64  * filter_sys_t: Distort video output method descriptor
65  *****************************************************************************
66  * This structure is part of the video output thread descriptor.
67  * It describes the Distort specific properties of an output thread.
68  *****************************************************************************/
69 struct filter_sys_t
70 {
71     double  f_angle;
72     mtime_t last_date;
73 };
74
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 )
81 {
82     filter_t *p_filter = (filter_t *)p_this;
83
84     const vlc_chroma_description_t *p_chroma =
85         vlc_fourcc_GetChromaDescription( p_filter->fmt_in.video.i_chroma );
86     if( p_chroma == NULL || p_chroma->plane_count == 0 )
87         return VLC_EGENERIC;
88
89     /* Allocate structure */
90     p_filter->p_sys = malloc( sizeof( filter_sys_t ) );
91     if( p_filter->p_sys == NULL )
92         return VLC_ENOMEM;
93
94     p_filter->pf_video_filter = Filter;
95
96     p_filter->p_sys->f_angle = 0.0;
97     p_filter->p_sys->last_date = 0;
98
99     return VLC_SUCCESS;
100 }
101
102 /*****************************************************************************
103  * Destroy: destroy Distort video thread output method
104  *****************************************************************************
105  * Terminate an output method created by DistortCreateOutputMethod
106  *****************************************************************************/
107 static void Destroy( vlc_object_t *p_this )
108 {
109     filter_t *p_filter = (filter_t *)p_this;
110     free( p_filter->p_sys );
111 }
112
113 /*****************************************************************************
114  * Render: displays previously rendered output
115  *****************************************************************************
116  * This function send the currently rendered image to Distort image, waits
117  * until it is displayed and switch the two rendering buffers, preparing next
118  * frame.
119  *****************************************************************************/
120 static picture_t *Filter( filter_t *p_filter, picture_t *p_pic )
121 {
122     picture_t *p_outpic;
123     double f_angle;
124     mtime_t new_date = mdate();
125
126     if( !p_pic ) return NULL;
127
128     p_outpic = filter_NewPicture( p_filter );
129     if( !p_outpic )
130     {
131         picture_Release( p_pic );
132         return NULL;
133     }
134
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;
138
139     for( int i_index = 0 ; i_index < p_pic->i_planes ; i_index++ )
140     {
141         int i_num_lines, i_visible_pitch, i_pixel_pitch, i_offset,
142             i_visible_pixels;
143         uint8_t black_pixel;
144         uint8_t *p_in, *p_out;
145
146         p_in = p_pic->p[i_index].p_pixels;
147         p_out = p_outpic->p[i_index].p_pixels;
148
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         switch( p_filter->fmt_in.video.i_chroma )
153         {
154             CASE_PACKED_YUV_422
155                 // Quick hack to fix u/v inversion occuring with 2 byte pixel pitch
156                 i_pixel_pitch *= 2;
157                 break;
158         }
159         i_visible_pixels = i_visible_pitch/i_pixel_pitch;
160
161         black_pixel = ( p_pic->i_planes > 1 && i_index == Y_PLANE ) ? 0x00
162                                                                     : 0x80;
163
164         /* Ok, we do 3 times the sin() calculation for each line. So what ? */
165         for( int i_line = 0 ; i_line < i_num_lines ; i_line++ )
166         {
167             /* Calculate today's offset, don't go above 1/20th of the screen */
168             i_offset = (int)( (double)(i_visible_pixels)
169                          * sin( f_angle + 10.0 * (double)i_line
170                                                / (double)i_num_lines )
171                          / 20.0 )*i_pixel_pitch;
172
173             if( i_offset )
174             {
175                 if( i_offset < 0 )
176                 {
177                     memcpy( p_out, p_in - i_offset,
178                                 i_visible_pitch + i_offset );
179                     p_in += p_pic->p[i_index].i_pitch;
180                     p_out += p_outpic->p[i_index].i_pitch;
181                     memset( p_out + i_offset, black_pixel, -i_offset );
182                 }
183                 else
184                 {
185                     memcpy( p_out + i_offset, p_in,
186                                 i_visible_pitch - i_offset );
187                     memset( p_out, black_pixel, i_offset );
188                     p_in += p_pic->p[i_index].i_pitch;
189                     p_out += p_outpic->p[i_index].i_pitch;
190                 }
191             }
192             else
193             {
194                 memcpy( p_out, p_in, i_visible_pitch );
195                 p_in += p_pic->p[i_index].i_pitch;
196                 p_out += p_outpic->p[i_index].i_pitch;
197             }
198
199         }
200     }
201
202     return CopyInfoAndRelease( p_outpic, p_pic );
203 }