1 /*****************************************************************************
2 * motion_blur.c : motion blur filter for vlc
3 *****************************************************************************
4 * Copyright (C) 2000, 2001, 2002, 2003 the VideoLAN team
7 * Authors: Sigmund Augdal Helberg <dnumgis@videolan.org>
8 * Antoine Cellerier <dionoea &t videolan d.t 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 *****************************************************************************/
36 #include <vlc_filter.h>
38 /*****************************************************************************
40 *****************************************************************************/
41 static int Create ( vlc_object_t * );
42 static void Destroy ( vlc_object_t * );
43 static picture_t *Filter ( filter_t *, picture_t * );
44 static void RenderBlur ( filter_sys_t *, picture_t *, picture_t * );
45 static void Copy ( filter_t *, picture_t * );
46 static int MotionBlurCallback( vlc_object_t *, char const *,
47 vlc_value_t, vlc_value_t, void * );
49 /*****************************************************************************
51 *****************************************************************************/
52 #define FACTOR_TEXT N_("Blur factor (1-127)")
53 #define FACTOR_LONGTEXT N_("The degree of blurring from 1 to 127.")
55 #define FILTER_PREFIX "blur-"
58 set_shortname( _("Motion blur") );
59 set_description( _("Motion blur filter") );
60 set_capability( "video filter2", 0 );
61 set_category( CAT_VIDEO );
62 set_subcategory( SUBCAT_VIDEO_VFILTER );
64 add_integer_with_range( FILTER_PREFIX "factor", 80, 1, 127, NULL,
65 FACTOR_TEXT, FACTOR_LONGTEXT, false );
67 add_shortcut( "blur" );
69 set_callbacks( Create, Destroy );
72 static const char *ppsz_filter_options[] = {
76 /*****************************************************************************
78 *****************************************************************************/
87 /*****************************************************************************
89 *****************************************************************************/
90 static int Create( vlc_object_t *p_this )
92 filter_t *p_filter = (filter_t *)p_this;
94 /* Allocate structure */
95 p_filter->p_sys = malloc( sizeof( filter_sys_t ) );
96 if( p_filter->p_sys == NULL )
98 msg_Err( p_filter, "out of memory" );
102 p_filter->pf_video_filter = Filter;
104 config_ChainParse( p_filter, FILTER_PREFIX, ppsz_filter_options,
107 p_filter->p_sys->i_factor =
108 var_CreateGetIntegerCommand( p_filter, FILTER_PREFIX "factor" );
109 var_AddCallback( p_filter, FILTER_PREFIX "factor",
110 MotionBlurCallback, p_filter->p_sys );
112 p_filter->p_sys->pp_planes = NULL;
113 p_filter->p_sys->i_planes = 0;
118 /*****************************************************************************
120 *****************************************************************************/
121 static void Destroy( vlc_object_t *p_this )
123 filter_t *p_filter = (filter_t *)p_this;
125 while( p_filter->p_sys->i_planes-- )
126 free( p_filter->p_sys->pp_planes[p_filter->p_sys->i_planes] );
127 free( p_filter->p_sys->pp_planes );
128 free( p_filter->p_sys );
131 #define RELEASE( pic ) \
132 if( pic ->pf_release ) \
133 pic ->pf_release( pic );
135 #define INITPIC( dst, src ) \
136 dst ->date = src ->date; \
137 dst ->b_force = src ->b_force; \
138 dst ->i_nb_fields = src ->i_nb_fields; \
139 dst ->b_progressive = src->b_progressive; \
140 dst ->b_top_field_first = src ->b_top_field_first;
142 /*****************************************************************************
144 *****************************************************************************/
145 static picture_t *Filter( filter_t *p_filter, picture_t *p_pic )
147 picture_t * p_outpic;
148 filter_sys_t *p_sys = p_filter->p_sys;
150 if( !p_pic ) return NULL;
152 p_outpic = p_filter->pf_vout_buffer_new( p_filter );
155 msg_Warn( p_filter, "can't get output picture" );
159 INITPIC( p_outpic, p_pic );
161 if( !p_sys->pp_planes )
163 /* initialise our picture buffer */
165 p_sys->i_planes = p_pic->i_planes;
167 (uint8_t**)malloc( p_sys->i_planes * sizeof( uint8_t * ) );
168 for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
170 p_sys->pp_planes[i_plane] = (uint8_t*)malloc(
171 p_pic->p[i_plane].i_pitch * p_pic->p[i_plane].i_visible_lines );
173 Copy( p_filter, p_pic );
176 /* Get a new picture */
177 RenderBlur( p_sys, p_pic, p_outpic );
178 Copy( p_filter, p_outpic );
184 /*****************************************************************************
185 * RenderBlur: renders a blurred picture
186 *****************************************************************************/
187 static void RenderBlur( filter_sys_t *p_sys, picture_t *p_newpic,
188 picture_t *p_outpic )
191 int i_oldfactor = p_sys->i_factor;
192 int i_newfactor = 128 - i_oldfactor;
193 for( i_plane = 0; i_plane < p_outpic->i_planes; i_plane++ )
195 uint8_t *p_old, *p_new, *p_out, *p_out_end, *p_out_line_end;
196 const int i_pitch = p_outpic->p[i_plane].i_pitch;
197 const int i_visible_pitch = p_outpic->p[i_plane].i_visible_pitch;
198 const int i_visible_lines = p_outpic->p[i_plane].i_visible_lines;
200 p_out = p_outpic->p[i_plane].p_pixels;
201 p_new = p_newpic->p[i_plane].p_pixels;
202 p_old = p_sys->pp_planes[i_plane];
203 p_out_end = p_out + i_pitch * i_visible_lines;
204 while ( p_out < p_out_end )
206 p_out_line_end = p_out + i_visible_pitch;
208 while ( p_out < p_out_line_end )
210 *p_out++ = (((*p_old++) * i_oldfactor) +
211 ((*p_new++) * i_newfactor)) >> 7;
214 p_old += i_pitch - i_visible_pitch;
215 p_new += i_pitch - i_visible_pitch;
216 p_out += i_pitch - i_visible_pitch;
221 static void Copy( filter_t *p_filter, picture_t *p_pic )
224 for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
227 p_filter->p_sys->pp_planes[i_plane], p_pic->p[i_plane].p_pixels,
228 p_pic->p[i_plane].i_pitch * p_pic->p[i_plane].i_visible_lines );
232 static int MotionBlurCallback( vlc_object_t *p_this, char const *psz_var,
233 vlc_value_t oldval, vlc_value_t newval,
236 VLC_UNUSED(p_this); VLC_UNUSED(oldval);
237 filter_sys_t *p_sys = (filter_sys_t *)p_data;
238 if( !strcmp( psz_var, FILTER_PREFIX "factor" ) )
239 p_sys->i_factor = __MIN( 127, __MAX( 1, newval.i_int ) );