1 /*****************************************************************************
2 * grey_yuv.c : grayscale to others conversion module for vlc
3 *****************************************************************************
4 * Copyright (C) 2007, 2008 the VideoLAN team
7 * Authors: Sam Hocevar <sam@zoy.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 *****************************************************************************/
32 #include <vlc_common.h>
33 #include <vlc_plugin.h>
34 #include <vlc_filter.h>
37 #define SRC_FOURCC "GREY"
38 #define DEST_FOURCC "I420,YUY2"
40 /*****************************************************************************
41 * Local and extern prototypes.
42 *****************************************************************************/
43 static int Activate ( vlc_object_t * );
45 static void GREY_I420( filter_t *, picture_t *, picture_t * );
46 static void GREY_YUY2( filter_t *, picture_t *, picture_t * );
48 static picture_t *GREY_I420_Filter( filter_t *, picture_t * );
49 static picture_t *GREY_YUY2_Filter( filter_t *, picture_t * );
51 /*****************************************************************************
53 *****************************************************************************/
55 set_description( N_("Conversions from " SRC_FOURCC " to " DEST_FOURCC) )
56 set_capability( "video filter2", 80 )
57 set_callbacks( Activate, NULL )
60 /*****************************************************************************
61 * Activate: allocate a chroma function
62 *****************************************************************************
63 * This function allocates and initializes a chroma function
64 *****************************************************************************/
65 static int Activate( vlc_object_t *p_this )
67 filter_t *p_filter = (filter_t *)p_this;
69 if( p_filter->fmt_out.video.i_width & 1
70 || p_filter->fmt_out.video.i_height & 1 )
75 if( p_filter->fmt_in.video.i_width != p_filter->fmt_out.video.i_width
76 || p_filter->fmt_in.video.i_height != p_filter->fmt_out.video.i_height )
79 switch( p_filter->fmt_in.video.i_chroma )
82 switch( p_filter->fmt_out.video.i_chroma )
85 p_filter->pf_video_filter = GREY_I420_Filter;
88 p_filter->pf_video_filter = GREY_YUY2_Filter;
102 VIDEO_FILTER_WRAPPER( GREY_I420 )
103 VIDEO_FILTER_WRAPPER( GREY_YUY2 )
105 /* Following functions are local */
107 /*****************************************************************************
108 * GREY_I420: 8-bit grayscale to planar YUV 4:2:0
109 *****************************************************************************/
110 static void GREY_I420( filter_t *p_filter, picture_t *p_source,
113 uint8_t *p_line = p_source->p->p_pixels;
114 uint8_t *p_y = p_dest->Y_PIXELS;
115 uint8_t *p_u = p_dest->U_PIXELS;
116 uint8_t *p_v = p_dest->V_PIXELS;
120 const int i_source_margin = p_source->p->i_pitch
121 - p_source->p->i_visible_pitch;
122 const int i_dest_margin = p_dest->p[0].i_pitch
123 - p_dest->p[0].i_visible_pitch;
124 const int i_dest_margin_c = p_dest->p[1].i_pitch
125 - p_dest->p[1].i_visible_pitch;
127 for( i_y = p_filter->fmt_in.video.i_height / 2; i_y-- ; )
129 memset(p_u, 0x80, p_dest->p[1].i_visible_pitch);
130 p_u += i_dest_margin_c;
132 memset(p_v, 0x80, p_dest->p[1].i_visible_pitch);
133 p_v += i_dest_margin_c;
136 for( i_y = p_filter->fmt_in.video.i_height; i_y-- ; )
138 for( i_x = p_filter->fmt_in.video.i_width / 8; i_x-- ; )
140 *p_y++ = *p_line++; *p_y++ = *p_line++;
141 *p_y++ = *p_line++; *p_y++ = *p_line++;
142 *p_y++ = *p_line++; *p_y++ = *p_line++;
143 *p_y++ = *p_line++; *p_y++ = *p_line++;
146 for( i_x = p_filter->fmt_in.video.i_width % 8; i_x-- ; )
151 p_line += i_source_margin;
152 p_y += i_dest_margin;
156 /*****************************************************************************
157 * GREY_YUY2: 8-bit grayscale to packed YUY2
158 *****************************************************************************/
159 static void GREY_YUY2( filter_t *p_filter, picture_t *p_source,
162 uint8_t *p_in = p_source->p->p_pixels;
163 uint8_t *p_out = p_dest->p->p_pixels;
167 const int i_source_margin = p_source->p->i_pitch
168 - p_source->p->i_visible_pitch;
169 const int i_dest_margin = p_dest->p->i_pitch
170 - p_dest->p->i_visible_pitch;
172 for( i_y = p_filter->fmt_out.video.i_height; i_y-- ; )
174 for( i_x = p_filter->fmt_out.video.i_width / 8; i_x-- ; )
176 *p_out++ = *p_in++; *p_out++ = 0x80;
177 *p_out++ = *p_in++; *p_out++ = 0x80;
178 *p_out++ = *p_in++; *p_out++ = 0x80;
179 *p_out++ = *p_in++; *p_out++ = 0x80;
180 *p_out++ = *p_in++; *p_out++ = 0x80;
181 *p_out++ = *p_in++; *p_out++ = 0x80;
182 *p_out++ = *p_in++; *p_out++ = 0x80;
183 *p_out++ = *p_in++; *p_out++ = 0x80;
186 for( i_x = (p_filter->fmt_out.video.i_width % 8) / 2; i_x-- ; )
188 *p_out++ = *p_in++; *p_out++ = 0x80;
189 *p_out++ = *p_in++; *p_out++ = 0x80;
192 p_in += i_source_margin;
193 p_out += i_dest_margin;