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 *****************************************************************************/
27 #include <stdlib.h> /* malloc(), free() */
33 #include "vlc_filter.h"
35 /*****************************************************************************
37 *****************************************************************************/
38 static int Create ( vlc_object_t * );
39 static void Destroy ( vlc_object_t * );
41 static picture_t *Filter( filter_t *, picture_t * );
43 #define FILTER_PREFIX "grain-"
45 /*****************************************************************************
47 *****************************************************************************/
49 set_description( _("Grain video filter") );
50 set_shortname( _( "Grain" ));
51 set_capability( "video filter2", 0 );
52 set_category( CAT_VIDEO );
53 set_subcategory( SUBCAT_VIDEO_VFILTER );
55 set_callbacks( Create, Destroy );
58 static const char *ppsz_filter_options[] = {
67 static int Create( vlc_object_t *p_this )
69 filter_t *p_filter = (filter_t *)p_this;
71 /* FIXME: check that chroma is YUV based */
73 /* Allocate structure */
74 p_filter->p_sys = malloc( sizeof( filter_sys_t ) );
75 if( p_filter->p_sys == NULL )
77 msg_Err( p_filter, "out of memory" );
81 config_ChainParse( p_filter, FILTER_PREFIX, ppsz_filter_options,
84 p_filter->pf_video_filter = Filter;
86 p_filter->p_sys->p_noise = NULL;
91 static void Destroy( vlc_object_t *p_this )
93 filter_t *p_filter = (filter_t *)p_this;
94 free( p_filter->p_sys->p_noise );
95 free( p_filter->p_sys );
98 static picture_t *Filter( filter_t *p_filter, picture_t *p_pic )
101 filter_sys_t *p_sys = p_filter->p_sys;
104 if( !p_pic ) return NULL;
106 p_outpic = p_filter->pf_vout_buffer_new( p_filter );
109 msg_Warn( p_filter, "can't get output picture" );
110 if( p_pic->pf_release )
111 p_pic->pf_release( p_pic );
116 uint8_t *p_in = p_pic->p[Y_PLANE].p_pixels;
117 uint8_t *p_out = p_outpic->p[Y_PLANE].p_pixels;
119 const int i_num_lines = p_pic->p[Y_PLANE].i_visible_lines;
120 const int i_num_cols = p_pic->p[Y_PLANE].i_visible_pitch;
121 const int i_pitch = p_pic->p[Y_PLANE].i_pitch;
125 int *p_noise = p_sys->p_noise;
128 p_noise = p_sys->p_noise =
129 (int*)malloc(i_pitch*i_num_lines*sizeof(int));
132 for( i_line = 0; i_line < i_num_lines; i_line++ )
134 for( i_col = 0; i_col < i_num_cols; i_col++ )
136 p_noise[i_line*i_pitch+i_col] = ((rand()&0x1f)-0x0f);
140 for( i_line = 2/*0*/ ; i_line < i_num_lines-2/**/; i_line++ )
142 for( i_col = 2/*0*/; i_col < i_num_cols/2; i_col++ )
144 p_out[i_line*i_pitch+i_col] = clip_uint8_vlc(
145 p_in[i_line*i_pitch+i_col]
147 + p_noise[i_line*i_pitch+i_col] );
150 + (( ( p_noise[(i_line-2)*i_pitch+i_col-2]<<1 )
151 + ( p_noise[(i_line-2)*i_pitch+i_col-1]<<2 )
152 + ( p_noise[(i_line-2)*i_pitch+i_col]<<2 )
153 + ( p_noise[(i_line-2)*i_pitch+i_col+1]<<2 )
154 + ( p_noise[(i_line-2)*i_pitch+i_col+2]<<1 )
156 + ( p_noise[(i_line-1)*i_pitch+i_col-2]<<2 )
157 + ( p_noise[(i_line-1)*i_pitch+i_col-1]<<3 )
158 + ( p_noise[(i_line-1)*i_pitch+i_col]*12 )
159 + ( p_noise[(i_line-1)*i_pitch+i_col+1]<<3 )
160 + ( p_noise[(i_line-1)*i_pitch+i_col+2]<<2 )
162 + ( p_noise[i_line*i_pitch+i_col-2]<<2 )
163 + ( p_noise[i_line*i_pitch+i_col-1]*12 )
164 + ( p_noise[i_line*i_pitch+i_col]<<4 )
165 + ( p_noise[i_line*i_pitch+i_col+1]*12 )
166 + ( p_noise[i_line*i_pitch+i_col+2]<<2 )
168 + ( p_noise[(i_line+1)*i_pitch+i_col-2]<<2 )
169 + ( p_noise[(i_line+1)*i_pitch+i_col-1]<<3 )
170 + ( p_noise[(i_line+1)*i_pitch+i_col]*12 )
171 + ( p_noise[(i_line+1)*i_pitch+i_col+1]<<3 )
172 + ( p_noise[(i_line+1)*i_pitch+i_col+2]<<2 )
174 + ( p_noise[(i_line+2)*i_pitch+i_col-2]<<1 )
175 + ( p_noise[(i_line+2)*i_pitch+i_col-1]<<2 )
176 + ( p_noise[(i_line+2)*i_pitch+i_col]<<2 )
177 + ( p_noise[(i_line+2)*i_pitch+i_col+1]<<2 )
178 + ( p_noise[(i_line+2)*i_pitch+i_col+2]<<1 )
183 for( ; i_col < i_num_cols; i_col++ )
184 p_out[i_line*i_pitch+i_col] = p_in[i_line*i_pitch+i_col];
188 for( i_index = 1; i_index < p_pic->i_planes; i_index++ )
190 uint8_t *p_in = p_pic->p[i_index].p_pixels;
191 uint8_t *p_out = p_outpic->p[i_index].p_pixels;
193 const int i_lines = p_pic->p[i_index].i_lines;
194 const int i_pitch = p_pic->p[i_index].i_pitch;
196 p_filter->p_libvlc->pf_memcpy( p_out, p_in, i_lines * i_pitch );
200 p_outpic->date = p_pic->date;
201 p_outpic->b_force = p_pic->b_force;
202 p_outpic->i_nb_fields = p_pic->i_nb_fields;
203 p_outpic->b_progressive = p_pic->b_progressive;
204 p_outpic->b_top_field_first = p_pic->b_top_field_first;
206 if( p_pic->pf_release )
207 p_pic->pf_release( p_pic );