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 *****************************************************************************/
33 #include <vlc_common.h>
34 #include <vlc_plugin.h>
36 #include "vlc_filter.h"
38 /*****************************************************************************
39 * filter_sys_t : filter descriptor
40 *****************************************************************************/
47 /****************************************************************************
49 ****************************************************************************/
50 static int OpenFilter ( vlc_object_t * );
51 static void CloseFilter( vlc_object_t * );
53 static picture_t *Filter( filter_t *, picture_t * );
55 /*****************************************************************************
57 *****************************************************************************/
59 set_description( N_("Video scaling filter") );
60 set_capability( "video filter2", 10 );
61 set_callbacks( OpenFilter, CloseFilter );
64 /*****************************************************************************
65 * OpenFilter: probe the filter and return score
66 *****************************************************************************/
67 static int OpenFilter( vlc_object_t *p_this )
69 filter_t *p_filter = (filter_t*)p_this;
72 if( ( p_filter->fmt_in.video.i_chroma != VLC_FOURCC('Y','U','V','P') &&
73 p_filter->fmt_in.video.i_chroma != VLC_FOURCC('Y','U','V','A') &&
74 p_filter->fmt_in.video.i_chroma != VLC_FOURCC('I','4','2','0') &&
75 p_filter->fmt_in.video.i_chroma != VLC_FOURCC('Y','V','1','2') &&
76 p_filter->fmt_in.video.i_chroma != VLC_FOURCC('R','V','3','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 )
88 p_filter->pf_video_filter = Filter;
90 msg_Dbg( p_filter, "%ix%i -> %ix%i", p_filter->fmt_in.video.i_width,
91 p_filter->fmt_in.video.i_height, p_filter->fmt_out.video.i_width,
92 p_filter->fmt_out.video.i_height );
97 /*****************************************************************************
98 * CloseFilter: clean up the filter
99 *****************************************************************************/
100 static void CloseFilter( vlc_object_t *p_this )
102 filter_t *p_filter = (filter_t*)p_this;
103 filter_sys_t *p_sys = p_filter->p_sys;
108 /****************************************************************************
109 * Filter: the whole thing
110 ****************************************************************************/
111 static picture_t *Filter( filter_t *p_filter, picture_t *p_pic )
113 picture_t *p_pic_dst;
116 if( !p_pic ) return NULL;
118 if( (p_filter->fmt_in.video.i_height == 0) ||
119 (p_filter->fmt_in.video.i_width == 0) )
122 if( (p_filter->fmt_out.video.i_height == 0) ||
123 (p_filter->fmt_out.video.i_width == 0) )
126 /* Request output picture */
127 p_pic_dst = p_filter->pf_vout_buffer_new( p_filter );
130 msg_Warn( p_filter, "can't get output picture" );
131 picture_Release( p_pic );
135 if( p_filter->fmt_in.video.i_chroma != VLC_FOURCC('R','G','B','A') &&
136 p_filter->fmt_in.video.i_chroma != VLC_FOURCC('R','V','3','2') )
138 for( i_plane = 0; i_plane < p_pic_dst->i_planes; i_plane++ )
140 const int i_src_pitch = p_pic->p[i_plane].i_pitch;
141 const int i_dst_pitch = p_pic_dst->p[i_plane].i_pitch;
142 const int i_src_height = p_filter->fmt_in.video.i_height;
143 const int i_src_width = p_filter->fmt_in.video.i_width;
144 const int i_dst_height = p_filter->fmt_out.video.i_height;
145 const int i_dst_width = p_filter->fmt_out.video.i_width;
146 const int i_dst_visible_lines =
147 p_pic_dst->p[i_plane].i_visible_lines;
148 const int i_dst_visible_pitch =
149 p_pic_dst->p[i_plane].i_visible_pitch;
150 const int i_dst_hidden_pitch = i_dst_pitch - i_dst_visible_pitch;
151 #define SHIFT_SIZE 16
152 const int i_height_coef = ( i_src_height << SHIFT_SIZE )
154 const int i_width_coef = ( i_src_width << SHIFT_SIZE )
156 const int i_src_height_1 = i_src_height - 1;
157 const int i_src_width_1 = i_src_width - 1;
159 uint8_t *p_src = p_pic->p[i_plane].p_pixels;
160 uint8_t *p_dst = p_pic_dst->p[i_plane].p_pixels;
161 uint8_t *p_dstendline = p_dst + i_dst_visible_pitch;
162 const uint8_t *p_dstend = p_dst + i_dst_visible_lines*i_dst_pitch;
164 const int i_shift_height = i_dst_height / i_src_height;
165 const int i_shift_width = i_dst_width / i_src_width;
167 int l = 1<<(SHIFT_SIZE-i_shift_height);
168 for( ; p_dst < p_dstend;
169 p_dst += i_dst_hidden_pitch,
170 p_dstendline += i_dst_pitch, l += i_height_coef )
172 int k = 1<<(SHIFT_SIZE-i_shift_width);
173 uint8_t *p_srcl = p_src
174 + (__MIN( i_src_height_1, l >> SHIFT_SIZE )*i_src_pitch);
176 for( ; p_dst < p_dstendline; p_dst++, k += i_width_coef )
178 *p_dst = p_srcl[__MIN( i_src_width_1, k >> SHIFT_SIZE )];
185 const int i_src_pitch = p_pic->p->i_pitch;
186 const int i_dst_pitch = p_pic_dst->p->i_pitch;
187 const int i_src_height = p_filter->fmt_in.video.i_height;
188 const int i_src_width = p_filter->fmt_in.video.i_width;
189 const int i_dst_height = p_filter->fmt_out.video.i_height;
190 const int i_dst_width = p_filter->fmt_out.video.i_width;
191 const int i_dst_visible_lines =
192 p_pic_dst->p->i_visible_lines;
193 const int i_dst_visible_pitch =
194 p_pic_dst->p->i_visible_pitch;
195 const int i_dst_hidden_pitch = i_dst_pitch - i_dst_visible_pitch;
196 const int i_height_coef = ( i_src_height << SHIFT_SIZE )
198 const int i_width_coef = ( i_src_width << SHIFT_SIZE )
200 const int i_src_height_1 = i_src_height - 1;
201 const int i_src_width_1 = i_src_width - 1;
203 uint32_t *p_src = (uint32_t*)p_pic->p->p_pixels;
204 uint32_t *p_dst = (uint32_t*)p_pic_dst->p->p_pixels;
205 uint32_t *p_dstendline = p_dst + (i_dst_visible_pitch>>2);
206 const uint32_t *p_dstend = p_dst + i_dst_visible_lines*(i_dst_pitch>>2);
208 const int i_shift_height = i_dst_height / i_src_height;
209 const int i_shift_width = i_dst_width / i_src_width;
211 int l = 1<<(SHIFT_SIZE-i_shift_height);
212 for( ; p_dst < p_dstend;
213 p_dst += (i_dst_hidden_pitch>>2),
214 p_dstendline += (i_dst_pitch>>2),
217 int k = 1<<(SHIFT_SIZE-i_shift_width);
218 uint32_t *p_srcl = p_src
219 + (__MIN( i_src_height_1, l >> SHIFT_SIZE )*(i_src_pitch>>2));
220 for( ; p_dst < p_dstendline; p_dst++, k += i_width_coef )
222 *p_dst = p_srcl[__MIN( i_src_width_1, k >> SHIFT_SIZE )];
227 picture_CopyProperties( p_pic_dst, p_pic );
228 picture_Release( p_pic );