1 /*****************************************************************************
2 * resize.c: video scaling module for YUVP/A, I420 and RGBA pictures
3 * Uses the low quality "nearest neighbour" algorithm.
4 *****************************************************************************
5 * Copyright (C) 2003-2007 the VideoLAN team
8 * Authors: Gildas Bazin <gbazin@videolan.org>
9 * Antoine Cellerier <dionoea @t videolan dot org>
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
24 *****************************************************************************/
26 /*****************************************************************************
28 *****************************************************************************/
35 #include "vlc_filter.h"
37 /*****************************************************************************
38 * filter_sys_t : filter descriptor
39 *****************************************************************************/
46 /****************************************************************************
48 ****************************************************************************/
49 static int OpenFilter ( vlc_object_t * );
50 static void CloseFilter( vlc_object_t * );
52 static picture_t *Filter( filter_t *, picture_t * );
54 /*****************************************************************************
56 *****************************************************************************/
58 set_description( _("Video scaling filter") );
59 set_capability( "video filter2", 10000 );
60 // set_category( CAT_VIDEO );
61 // set_subcategory( SUBCAT_VIDEO_VFILTER2 );
62 set_callbacks( OpenFilter, CloseFilter );
65 /*****************************************************************************
66 * OpenFilter: probe the filter and return score
67 *****************************************************************************/
68 static int OpenFilter( vlc_object_t *p_this )
70 filter_t *p_filter = (filter_t*)p_this;
73 if( ( p_filter->fmt_in.video.i_chroma != VLC_FOURCC('Y','U','V','P') &&
74 p_filter->fmt_in.video.i_chroma != VLC_FOURCC('Y','U','V','A') &&
75 p_filter->fmt_in.video.i_chroma != VLC_FOURCC('I','4','2','0') &&
76 p_filter->fmt_in.video.i_chroma != VLC_FOURCC('Y','V','1','2') &&
77 p_filter->fmt_in.video.i_chroma != VLC_FOURCC('R','G','B','A') ) ||
78 p_filter->fmt_in.video.i_chroma != p_filter->fmt_out.video.i_chroma )
83 /* Allocate the memory needed to store the decoder's structure */
84 if( ( p_filter->p_sys = p_sys =
85 (filter_sys_t *)malloc(sizeof(filter_sys_t)) ) == NULL )
87 msg_Err( p_filter, "out of memory" );
91 p_filter->pf_video_filter = Filter;
93 msg_Dbg( p_filter, "%ix%i -> %ix%i", p_filter->fmt_in.video.i_width,
94 p_filter->fmt_in.video.i_height, p_filter->fmt_out.video.i_width,
95 p_filter->fmt_out.video.i_height );
100 /*****************************************************************************
101 * CloseFilter: clean up the filter
102 *****************************************************************************/
103 static void CloseFilter( vlc_object_t *p_this )
105 filter_t *p_filter = (filter_t*)p_this;
106 filter_sys_t *p_sys = p_filter->p_sys;
111 /****************************************************************************
112 * Filter: the whole thing
113 ****************************************************************************/
114 static picture_t *Filter( filter_t *p_filter, picture_t *p_pic )
116 picture_t *p_pic_dst;
119 if( !p_pic ) return NULL;
121 if( (p_filter->fmt_in.video.i_height == 0) ||
122 (p_filter->fmt_in.video.i_width == 0) )
125 if( (p_filter->fmt_out.video.i_height == 0) ||
126 (p_filter->fmt_out.video.i_width == 0) )
129 /* Request output picture */
130 p_pic_dst = p_filter->pf_vout_buffer_new( p_filter );
133 msg_Warn( p_filter, "can't get output picture" );
134 if( p_pic->pf_release )
135 p_pic->pf_release( p_pic );
139 if( p_filter->fmt_in.video.i_chroma != VLC_FOURCC('R','G','B','A') )
141 for( i_plane = 0; i_plane < p_pic_dst->i_planes; i_plane++ )
143 const int i_src_pitch = p_pic->p[i_plane].i_pitch;
144 const int i_dst_pitch = p_pic_dst->p[i_plane].i_pitch;
145 const int i_src_height = p_filter->fmt_in.video.i_height;
146 const int i_src_width = p_filter->fmt_in.video.i_width;
147 const int i_dst_height = p_filter->fmt_out.video.i_height;
148 const int i_dst_width = p_filter->fmt_out.video.i_width;
149 const int i_dst_visible_lines =
150 p_pic_dst->p[i_plane].i_visible_lines;
151 const int i_dst_visible_pitch =
152 p_pic_dst->p[i_plane].i_visible_pitch;
153 const int i_dst_hidden_pitch = i_dst_pitch - i_dst_visible_pitch;
154 #define SHIFT_SIZE 16
155 const int i_height_coef = ( i_src_height << SHIFT_SIZE )
157 const int i_width_coef = ( i_src_width << SHIFT_SIZE )
159 const int i_src_height_1 = i_src_height - 1;
160 const int i_src_width_1 = i_src_width - 1;
162 uint8_t *p_src = p_pic->p[i_plane].p_pixels;
163 uint8_t *p_dst = p_pic_dst->p[i_plane].p_pixels;
164 uint8_t *p_dstendline = p_dst + i_dst_visible_pitch;
165 const uint8_t *p_dstend = p_dst + i_dst_visible_lines*i_dst_pitch;
167 const int i_shift_height = i_dst_height / i_src_height;
168 const int i_shift_width = i_dst_width / i_src_width;
170 int l = 1<<(SHIFT_SIZE-i_shift_height);
171 for( ; p_dst < p_dstend;
172 p_dst += i_dst_hidden_pitch,
173 p_dstendline += i_dst_pitch, l += i_height_coef )
175 int k = 1<<(SHIFT_SIZE-i_shift_width);
176 uint8_t *p_srcl = p_src
177 + (__MIN( i_src_height_1, l >> SHIFT_SIZE )*i_src_pitch);
179 for( ; p_dst < p_dstendline; p_dst++, k += i_width_coef )
181 *p_dst = p_srcl[__MIN( i_src_width_1, k >> SHIFT_SIZE )];
188 const int i_src_pitch = p_pic->p->i_pitch;
189 const int i_dst_pitch = p_pic_dst->p->i_pitch;
190 const int i_src_height = p_filter->fmt_in.video.i_height;
191 const int i_src_width = p_filter->fmt_in.video.i_width;
192 const int i_dst_height = p_filter->fmt_out.video.i_height;
193 const int i_dst_width = p_filter->fmt_out.video.i_width;
194 const int i_dst_visible_lines =
195 p_pic_dst->p->i_visible_lines;
196 const int i_dst_visible_pitch =
197 p_pic_dst->p->i_visible_pitch;
198 const int i_dst_hidden_pitch = i_dst_pitch - i_dst_visible_pitch;
199 const int i_height_coef = ( i_src_height << SHIFT_SIZE )
201 const int i_width_coef = ( i_src_width << SHIFT_SIZE )
203 const int i_src_height_1 = i_src_height - 1;
204 const int i_src_width_1 = i_src_width - 1;
206 uint32_t *p_src = (uint32_t*)p_pic->p->p_pixels;
207 uint32_t *p_dst = (uint32_t*)p_pic_dst->p->p_pixels;
208 uint32_t *p_dstendline = p_dst + (i_dst_visible_pitch>>2);
209 const uint32_t *p_dstend = p_dst + i_dst_visible_lines*(i_dst_pitch>>2);
211 const int i_shift_height = i_dst_height / i_src_height;
212 const int i_shift_width = i_dst_width / i_src_width;
214 int l = 1<<(SHIFT_SIZE-i_shift_height);
215 for( ; p_dst < p_dstend;
216 p_dst += (i_dst_hidden_pitch>>2),
217 p_dstendline += (i_dst_pitch>>2),
220 int k = 1<<(SHIFT_SIZE-i_shift_width);
221 uint32_t *p_srcl = p_src
222 + (__MIN( i_src_height_1, l >> SHIFT_SIZE )*(i_src_pitch>>2));
223 for( ; p_dst < p_dstendline; p_dst++, k += i_width_coef )
225 *p_dst = p_srcl[__MIN( i_src_width_1, k >> SHIFT_SIZE )];
230 p_pic_dst->date = p_pic->date;
231 p_pic_dst->b_force = p_pic->b_force;
232 p_pic_dst->i_nb_fields = p_pic->i_nb_fields;
233 p_pic_dst->b_progressive = p_pic->b_progressive;
234 p_pic_dst->b_top_field_first = p_pic->b_top_field_first;
236 p_pic->pf_release( p_pic );