Use gettext_noop() consistently
[vlc.git] / modules / video_chroma / grey_yuv.c
1 /*****************************************************************************
2  * grey_yuv.c : grayscale to others conversion module for vlc
3  *****************************************************************************
4  * Copyright (C) 2007 the VideoLAN team
5  * $Id$
6  *
7  * Authors: Sam Hocevar <sam@zoy.org>
8  *
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.
13  *
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.
18  *
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  *****************************************************************************/
23
24 /*****************************************************************************
25  * Preamble
26  *****************************************************************************/
27
28 #ifdef HAVE_CONFIG_H
29 # include "config.h"
30 #endif
31
32 #include <vlc/vlc.h>
33 #include <vlc_plugin.h>
34 #include <vlc_vout.h>
35
36 #define SRC_FOURCC  "GREY"
37 #define DEST_FOURCC "I420,YUY2"
38
39 /*****************************************************************************
40  * Local and extern prototypes.
41  *****************************************************************************/
42 static int  Activate ( vlc_object_t * );
43
44 static void GREY_I420           ( vout_thread_t *, picture_t *, picture_t * );
45 static void GREY_YUY2           ( vout_thread_t *, picture_t *, picture_t * );
46
47 /*****************************************************************************
48  * Module descriptor.
49  *****************************************************************************/
50 vlc_module_begin();
51     set_description( N_("Conversions from " SRC_FOURCC " to " DEST_FOURCC) );
52     set_capability( "chroma", 80 );
53     set_callbacks( Activate, NULL );
54 vlc_module_end();
55
56 /*****************************************************************************
57  * Activate: allocate a chroma function
58  *****************************************************************************
59  * This function allocates and initializes a chroma function
60  *****************************************************************************/
61 static int Activate( vlc_object_t *p_this )
62 {
63     vout_thread_t *p_vout = (vout_thread_t *)p_this;
64
65     if( p_vout->render.i_width & 1 || p_vout->render.i_height & 1 )
66     {
67         return -1;
68     }
69
70     switch( p_vout->render.i_chroma )
71     {
72         case VLC_FOURCC('Y','8','0','0'):
73             p_vout->render.i_chroma = VLC_FOURCC('G','R','E','Y');
74         case VLC_FOURCC('G','R','E','Y'):
75             switch( p_vout->output.i_chroma )
76             {
77                 case VLC_FOURCC('I','4','2','0'):
78                     p_vout->chroma.pf_convert = GREY_I420;
79                     break;
80                 case VLC_FOURCC('Y','U','Y','2'):
81                     p_vout->chroma.pf_convert = GREY_YUY2;
82                     break;
83                 default:
84                     return -1;
85             }
86             break;
87
88         default:
89             return -1;
90     }
91
92     return 0;
93 }
94
95 /* Following functions are local */
96
97 /*****************************************************************************
98  * GREY_I420: 8-bit grayscale to planar YUV 4:2:0
99  *****************************************************************************/
100 static void GREY_I420( vout_thread_t *p_vout, picture_t *p_source,
101                                               picture_t *p_dest )
102 {
103     uint8_t *p_line = p_source->p->p_pixels;
104     uint8_t *p_y = p_dest->Y_PIXELS;
105     uint8_t *p_u = p_dest->U_PIXELS;
106     uint8_t *p_v = p_dest->V_PIXELS;
107
108     int i_x, i_y;
109
110     const int i_source_margin = p_source->p->i_pitch
111                                  - p_source->p->i_visible_pitch;
112     const int i_dest_margin = p_dest->p[0].i_pitch
113                                - p_dest->p[0].i_visible_pitch;
114     const int i_dest_margin_c = p_dest->p[1].i_pitch
115                                  - p_dest->p[1].i_visible_pitch;
116
117     for( i_y = p_vout->render.i_height / 2; i_y-- ; )
118     {
119         memset(p_u, 0x80, p_dest->p[1].i_visible_pitch);
120         p_u += i_dest_margin_c;
121
122         memset(p_v, 0x80, p_dest->p[1].i_visible_pitch);
123         p_v += i_dest_margin_c;
124     }
125
126     for( i_y = p_vout->render.i_height; i_y-- ; )
127     {
128         for( i_x = p_vout->render.i_width / 8; i_x-- ; )
129         {
130             *p_y++ = *p_line++; *p_y++ = *p_line++;
131             *p_y++ = *p_line++; *p_y++ = *p_line++;
132             *p_y++ = *p_line++; *p_y++ = *p_line++;
133             *p_y++ = *p_line++; *p_y++ = *p_line++;
134         }
135
136         for( i_x = p_vout->render.i_width % 8; i_x-- ; )
137         {
138             *p_y++ = *p_line++;
139         }
140
141         p_line += i_source_margin;
142         p_y += i_dest_margin;
143     }
144 }
145
146 /*****************************************************************************
147  * GREY_YUY2: 8-bit grayscale to packed YUY2
148  *****************************************************************************/
149 static void GREY_YUY2( vout_thread_t *p_vout, picture_t *p_source,
150                                               picture_t *p_dest )
151 {
152     uint8_t *p_in = p_source->p->p_pixels;
153     uint8_t *p_out = p_dest->p->p_pixels;
154
155     int i_x, i_y;
156
157     const int i_source_margin = p_source->p->i_pitch
158                                  - p_source->p->i_visible_pitch;
159     const int i_dest_margin = p_dest->p->i_pitch
160                                - p_dest->p->i_visible_pitch;
161
162     for( i_y = p_vout->render.i_height; i_y-- ; )
163     {
164         for( i_x = p_vout->render.i_width / 8; i_x-- ; )
165         {
166             *p_out++ = *p_in++; *p_out++ = 0x80;
167             *p_out++ = *p_in++; *p_out++ = 0x80;
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         }
175
176         for( i_x = (p_vout->render.i_width % 8) / 2; i_x-- ; )
177         {
178             *p_out++ = *p_in++; *p_out++ = 0x80;
179             *p_out++ = *p_in++; *p_out++ = 0x80;
180         }
181
182         p_in += i_source_margin;
183         p_out += i_dest_margin;
184     }
185 }
186