1 /*****************************************************************************
2 * noise.c : "add grain to image" video filter
3 *****************************************************************************
4 * Copyright (C) 2000-2007 the VideoLAN team
7 * Authors: Antoine Cellerier <dionoea -at- videolan -dot- org>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
22 *****************************************************************************/
24 /*****************************************************************************
26 *****************************************************************************/
31 #include "vlc_filter.h"
33 /*****************************************************************************
35 *****************************************************************************/
36 static int Create ( vlc_object_t * );
37 static void Destroy ( vlc_object_t * );
39 static picture_t *Filter( filter_t *, picture_t * );
41 #define FILTER_PREFIX "grain-"
43 /*****************************************************************************
45 *****************************************************************************/
47 set_description( _("Grain video filter") );
48 set_shortname( _( "Grain" ));
49 set_capability( "video filter2", 0 );
50 set_category( CAT_VIDEO );
51 set_subcategory( SUBCAT_VIDEO_VFILTER );
53 set_callbacks( Create, Destroy );
56 static const char *ppsz_filter_options[] = {
65 static int Create( vlc_object_t *p_this )
67 filter_t *p_filter = (filter_t *)p_this;
69 /* FIXME: check that chroma is YUV based */
71 /* Allocate structure */
72 p_filter->p_sys = malloc( sizeof( filter_sys_t ) );
73 if( p_filter->p_sys == NULL )
75 msg_Err( p_filter, "out of memory" );
79 config_ChainParse( p_filter, FILTER_PREFIX, ppsz_filter_options,
82 p_filter->pf_video_filter = Filter;
84 p_filter->p_sys->p_noise = NULL;
89 static void Destroy( vlc_object_t *p_this )
91 filter_t *p_filter = (filter_t *)p_this;
92 free( p_filter->p_sys->p_noise );
93 free( p_filter->p_sys );
96 static picture_t *Filter( filter_t *p_filter, picture_t *p_pic )
99 filter_sys_t *p_sys = p_filter->p_sys;
102 if( !p_pic ) return NULL;
104 p_outpic = p_filter->pf_vout_buffer_new( p_filter );
107 msg_Warn( p_filter, "can't get output picture" );
108 if( p_pic->pf_release )
109 p_pic->pf_release( p_pic );
114 uint8_t *p_in = p_pic->p[Y_PLANE].p_pixels;
115 uint8_t *p_out = p_outpic->p[Y_PLANE].p_pixels;
117 const int i_num_lines = p_pic->p[Y_PLANE].i_visible_lines;
118 const int i_num_cols = p_pic->p[Y_PLANE].i_visible_pitch;
119 const int i_pitch = p_pic->p[Y_PLANE].i_pitch;
123 int *p_noise = p_sys->p_noise;
126 p_noise = p_sys->p_noise =
127 (int*)malloc(i_pitch*i_num_lines*sizeof(int));
130 for( i_line = 0; i_line < i_num_lines; i_line++ )
132 for( i_col = 0; i_col < i_num_cols; i_col++ )
134 p_noise[i_line*i_pitch+i_col] = ((rand()&0x1f)-0x0f);
138 for( i_line = 2/*0*/ ; i_line < i_num_lines-2/**/; i_line++ )
140 for( i_col = 2/*0*/; i_col < i_num_cols/2; i_col++ )
142 p_out[i_line*i_pitch+i_col] = clip_uint8_vlc(
143 p_in[i_line*i_pitch+i_col]
145 + p_noise[i_line*i_pitch+i_col] );
148 + (( ( p_noise[(i_line-2)*i_pitch+i_col-2]<<1 )
149 + ( p_noise[(i_line-2)*i_pitch+i_col-1]<<2 )
150 + ( p_noise[(i_line-2)*i_pitch+i_col]<<2 )
151 + ( p_noise[(i_line-2)*i_pitch+i_col+1]<<2 )
152 + ( p_noise[(i_line-2)*i_pitch+i_col+2]<<1 )
154 + ( p_noise[(i_line-1)*i_pitch+i_col-2]<<2 )
155 + ( p_noise[(i_line-1)*i_pitch+i_col-1]<<3 )
156 + ( p_noise[(i_line-1)*i_pitch+i_col]*12 )
157 + ( p_noise[(i_line-1)*i_pitch+i_col+1]<<3 )
158 + ( p_noise[(i_line-1)*i_pitch+i_col+2]<<2 )
160 + ( p_noise[i_line*i_pitch+i_col-2]<<2 )
161 + ( p_noise[i_line*i_pitch+i_col-1]*12 )
162 + ( p_noise[i_line*i_pitch+i_col]<<4 )
163 + ( p_noise[i_line*i_pitch+i_col+1]*12 )
164 + ( p_noise[i_line*i_pitch+i_col+2]<<2 )
166 + ( p_noise[(i_line+1)*i_pitch+i_col-2]<<2 )
167 + ( p_noise[(i_line+1)*i_pitch+i_col-1]<<3 )
168 + ( p_noise[(i_line+1)*i_pitch+i_col]*12 )
169 + ( p_noise[(i_line+1)*i_pitch+i_col+1]<<3 )
170 + ( p_noise[(i_line+1)*i_pitch+i_col+2]<<2 )
172 + ( p_noise[(i_line+2)*i_pitch+i_col-2]<<1 )
173 + ( p_noise[(i_line+2)*i_pitch+i_col-1]<<2 )
174 + ( p_noise[(i_line+2)*i_pitch+i_col]<<2 )
175 + ( p_noise[(i_line+2)*i_pitch+i_col+1]<<2 )
176 + ( p_noise[(i_line+2)*i_pitch+i_col+2]<<1 )
181 for( ; i_col < i_num_cols; i_col++ )
182 p_out[i_line*i_pitch+i_col] = p_in[i_line*i_pitch+i_col];
186 for( i_index = 1; i_index < p_pic->i_planes; i_index++ )
188 uint8_t *p_in = p_pic->p[i_index].p_pixels;
189 uint8_t *p_out = p_outpic->p[i_index].p_pixels;
191 const int i_lines = p_pic->p[i_index].i_lines;
192 const int i_pitch = p_pic->p[i_index].i_pitch;
194 p_filter->p_libvlc->pf_memcpy( p_out, p_in, i_lines * i_pitch );
198 p_outpic->date = p_pic->date;
199 p_outpic->b_force = p_pic->b_force;
200 p_outpic->i_nb_fields = p_pic->i_nb_fields;
201 p_outpic->b_progressive = p_pic->b_progressive;
202 p_outpic->b_top_field_first = p_pic->b_top_field_first;
204 if( p_pic->pf_release )
205 p_pic->pf_release( p_pic );