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 /*****************************************************************************
50 *****************************************************************************/
52 set_description( N_("Conversions from " SRC_FOURCC " to " DEST_FOURCC) );
53 set_capability( "chroma", 80 );
54 set_callbacks( Activate, NULL );
57 /*****************************************************************************
58 * Activate: allocate a chroma function
59 *****************************************************************************
60 * This function allocates and initializes a chroma function
61 *****************************************************************************/
62 static int Activate( vlc_object_t *p_this )
64 filter_t *p_filter = (filter_t *)p_this;
66 if( p_filter->fmt_out.video.i_width & 1
67 || p_filter->fmt_out.video.i_height & 1 )
72 switch( p_filter->fmt_in.video.i_chroma )
74 case VLC_FOURCC('Y','8','0','0'):
75 p_filter->fmt_in.video.i_chroma = VLC_FOURCC('G','R','E','Y');
76 case VLC_FOURCC('G','R','E','Y'):
77 switch( p_filter->fmt_out.video.i_chroma )
79 case VLC_FOURCC('I','4','2','0'):
80 p_filter->pf_video_filter_io = GREY_I420;
82 case VLC_FOURCC('Y','U','Y','2'):
83 p_filter->pf_video_filter_io = GREY_YUY2;
97 /* Following functions are local */
99 /*****************************************************************************
100 * GREY_I420: 8-bit grayscale to planar YUV 4:2:0
101 *****************************************************************************/
102 static void GREY_I420( filter_t *p_filter, picture_t *p_source,
105 uint8_t *p_line = p_source->p->p_pixels;
106 uint8_t *p_y = p_dest->Y_PIXELS;
107 uint8_t *p_u = p_dest->U_PIXELS;
108 uint8_t *p_v = p_dest->V_PIXELS;
112 const int i_source_margin = p_source->p->i_pitch
113 - p_source->p->i_visible_pitch;
114 const int i_dest_margin = p_dest->p[0].i_pitch
115 - p_dest->p[0].i_visible_pitch;
116 const int i_dest_margin_c = p_dest->p[1].i_pitch
117 - p_dest->p[1].i_visible_pitch;
119 for( i_y = p_filter->fmt_in.video.i_height / 2; i_y-- ; )
121 memset(p_u, 0x80, p_dest->p[1].i_visible_pitch);
122 p_u += i_dest_margin_c;
124 memset(p_v, 0x80, p_dest->p[1].i_visible_pitch);
125 p_v += i_dest_margin_c;
128 for( i_y = p_filter->fmt_in.video.i_height; i_y-- ; )
130 for( i_x = p_filter->fmt_in.video.i_width / 8; i_x-- ; )
132 *p_y++ = *p_line++; *p_y++ = *p_line++;
133 *p_y++ = *p_line++; *p_y++ = *p_line++;
134 *p_y++ = *p_line++; *p_y++ = *p_line++;
135 *p_y++ = *p_line++; *p_y++ = *p_line++;
138 for( i_x = p_filter->fmt_in.video.i_width % 8; i_x-- ; )
143 p_line += i_source_margin;
144 p_y += i_dest_margin;
148 /*****************************************************************************
149 * GREY_YUY2: 8-bit grayscale to packed YUY2
150 *****************************************************************************/
151 static void GREY_YUY2( filter_t *p_filter, picture_t *p_source,
154 uint8_t *p_in = p_source->p->p_pixels;
155 uint8_t *p_out = p_dest->p->p_pixels;
159 const int i_source_margin = p_source->p->i_pitch
160 - p_source->p->i_visible_pitch;
161 const int i_dest_margin = p_dest->p->i_pitch
162 - p_dest->p->i_visible_pitch;
164 for( i_y = p_filter->fmt_out.video.i_height; i_y-- ; )
166 for( i_x = p_filter->fmt_out.video.i_width / 8; i_x-- ; )
168 *p_out++ = *p_in++; *p_out++ = 0x80;
169 *p_out++ = *p_in++; *p_out++ = 0x80;
170 *p_out++ = *p_in++; *p_out++ = 0x80;
171 *p_out++ = *p_in++; *p_out++ = 0x80;
172 *p_out++ = *p_in++; *p_out++ = 0x80;
173 *p_out++ = *p_in++; *p_out++ = 0x80;
174 *p_out++ = *p_in++; *p_out++ = 0x80;
175 *p_out++ = *p_in++; *p_out++ = 0x80;
178 for( i_x = (p_filter->fmt_out.video.i_width % 8) / 2; i_x-- ; )
180 *p_out++ = *p_in++; *p_out++ = 0x80;
181 *p_out++ = *p_in++; *p_out++ = 0x80;
184 p_in += i_source_margin;
185 p_out += i_dest_margin;