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 *****************************************************************************/
33 #include <vlc_filter.h>
35 /*****************************************************************************
37 *****************************************************************************/
38 static int Create ( vlc_object_t * );
39 static void Destroy ( vlc_object_t * );
40 static picture_t *Filter ( filter_t *, picture_t * );
41 static void RenderBlur ( filter_sys_t *, picture_t *, picture_t * );
42 static void Copy ( filter_t *, uint8_t **, picture_t * );
43 static int MotionBlurCallback( vlc_object_t *, char const *,
44 vlc_value_t, vlc_value_t, void * );
46 /*****************************************************************************
48 *****************************************************************************/
49 #define FACTOR_TEXT N_("Blur factor (1-127)")
50 #define FACTOR_LONGTEXT N_("The degree of blurring from 1 to 127.")
52 #define FILTER_PREFIX "blur-"
55 set_shortname( _("Motion blur") );
56 set_description( _("Motion blur filter") );
57 set_capability( "video filter2", 0 );
58 set_category( CAT_VIDEO );
59 set_subcategory( SUBCAT_VIDEO_VFILTER );
61 add_integer_with_range( FILTER_PREFIX "factor", 80, 1, 127, NULL,
62 FACTOR_TEXT, FACTOR_LONGTEXT, VLC_FALSE );
64 add_shortcut( "blur" );
66 set_callbacks( Create, Destroy );
69 static const char *ppsz_filter_options[] = {
73 /*****************************************************************************
75 *****************************************************************************/
84 /*****************************************************************************
86 *****************************************************************************/
87 static int Create( vlc_object_t *p_this )
89 filter_t *p_filter = (filter_t *)p_this;
91 /* Allocate structure */
92 p_filter->p_sys = malloc( sizeof( filter_sys_t ) );
93 if( p_filter->p_sys == NULL )
95 msg_Err( p_filter, "out of memory" );
99 p_filter->pf_video_filter = Filter;
101 config_ChainParse( p_filter, FILTER_PREFIX, ppsz_filter_options,
104 p_filter->p_sys->i_factor =
105 var_CreateGetIntegerCommand( p_filter, FILTER_PREFIX "factor" );
106 var_AddCallback( p_filter, FILTER_PREFIX "factor",
107 MotionBlurCallback, p_filter->p_sys );
109 p_filter->p_sys->pp_planes = NULL;
110 p_filter->p_sys->i_planes = 0;
115 /*****************************************************************************
117 *****************************************************************************/
118 static void Destroy( vlc_object_t *p_this )
120 filter_t *p_filter = (filter_t *)p_this;
122 while( p_filter->p_sys->i_planes-- )
123 free( p_filter->p_sys->pp_planes[p_filter->p_sys->i_planes] );
124 free( p_filter->p_sys->pp_planes );
125 free( p_filter->p_sys );
128 #define RELEASE( pic ) \
129 if( pic ->pf_release ) \
130 pic ->pf_release( pic );
132 #define INITPIC( dst, src ) \
133 dst ->date = src ->date; \
134 dst ->b_force = src ->b_force; \
135 dst ->i_nb_fields = src ->i_nb_fields; \
136 dst ->b_progressive = src->b_progressive; \
137 dst ->b_top_field_first = src ->b_top_field_first;
139 /*****************************************************************************
141 *****************************************************************************/
142 static picture_t *Filter( filter_t *p_filter, picture_t *p_pic )
144 picture_t * p_outpic;
145 filter_sys_t *p_sys = p_filter->p_sys;
147 if( !p_pic ) return NULL;
149 p_outpic = p_filter->pf_vout_buffer_new( p_filter );
152 msg_Warn( p_filter, "can't get output picture" );
156 INITPIC( p_outpic, p_pic );
158 if( !p_sys->pp_planes )
160 /* initialise our picture buffer */
162 p_sys->i_planes = p_pic->i_planes;
164 (uint8_t**)malloc( p_sys->i_planes * sizeof( uint8_t * ) );
165 for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
167 p_sys->pp_planes[i_plane] = (uint8_t*)malloc(
168 p_pic->p[i_plane].i_pitch * p_pic->p[i_plane].i_visible_lines );
170 Copy( p_filter, p_sys->pp_planes, p_pic );
173 /* Get a new picture */
174 RenderBlur( p_sys, p_pic, p_outpic );
175 Copy( p_filter, p_sys->pp_planes, p_outpic );
181 /*****************************************************************************
182 * RenderBlur: renders a blurred picture
183 *****************************************************************************/
184 static void RenderBlur( filter_sys_t *p_sys, picture_t *p_newpic,
185 picture_t *p_outpic )
188 int i_oldfactor = p_sys->i_factor;
189 int i_newfactor = 128 - i_oldfactor;
190 for( i_plane = 0; i_plane < p_outpic->i_planes; i_plane++ )
192 uint8_t *p_old, *p_new, *p_out, *p_out_end, *p_out_line_end;
193 const int i_pitch = p_outpic->p[i_plane].i_pitch;
194 const int i_visible_pitch = p_outpic->p[i_plane].i_visible_pitch;
195 const int i_visible_lines = p_outpic->p[i_plane].i_visible_lines;
197 p_out = p_outpic->p[i_plane].p_pixels;
198 p_new = p_newpic->p[i_plane].p_pixels;
199 p_old = p_sys->pp_planes[i_plane];
200 p_out_end = p_out + i_pitch * i_visible_lines;
201 while ( p_out < p_out_end )
203 p_out_line_end = p_out + i_visible_pitch;
205 while ( p_out < p_out_line_end )
207 *p_out++ = (((*p_old++) * i_oldfactor) +
208 ((*p_new++) * i_newfactor)) >> 7;
211 p_old += i_pitch - i_visible_pitch;
212 p_new += i_pitch - i_visible_pitch;
213 p_out += i_pitch - i_visible_pitch;
218 static void Copy( filter_t *p_filter, uint8_t **pp_planes, picture_t *p_pic )
221 for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
223 p_filter->p_libvlc->pf_memcpy(
224 p_filter->p_sys->pp_planes[i_plane], p_pic->p[i_plane].p_pixels,
225 p_pic->p[i_plane].i_pitch * p_pic->p[i_plane].i_visible_lines );
229 static int MotionBlurCallback( vlc_object_t *p_this, char const *psz_var,
230 vlc_value_t oldval, vlc_value_t newval,
233 filter_sys_t *p_sys = (filter_sys_t *)p_data;
234 if( !strcmp( psz_var, FILTER_PREFIX "factor" ) )
235 p_sys->i_factor = __MIN( 127, __MAX( 1, newval.i_int ) );