Don't include config.h from the headers - refs #297.
[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_vout.h>
34
35 #define SRC_FOURCC  "GREY"
36 #define DEST_FOURCC "I420,YUY2"
37
38 /*****************************************************************************
39  * Local and extern prototypes.
40  *****************************************************************************/
41 static int  Activate ( vlc_object_t * );
42
43 static void GREY_I420           ( vout_thread_t *, picture_t *, picture_t * );
44 static void GREY_YUY2           ( vout_thread_t *, picture_t *, picture_t * );
45
46 /*****************************************************************************
47  * Module descriptor.
48  *****************************************************************************/
49 vlc_module_begin();
50     set_description( _("Conversions from " SRC_FOURCC " to " DEST_FOURCC) );
51     set_capability( "chroma", 80 );
52     set_callbacks( Activate, NULL );
53 vlc_module_end();
54
55 /*****************************************************************************
56  * Activate: allocate a chroma function
57  *****************************************************************************
58  * This function allocates and initializes a chroma function
59  *****************************************************************************/
60 static int Activate( vlc_object_t *p_this )
61 {
62     vout_thread_t *p_vout = (vout_thread_t *)p_this;
63
64     if( p_vout->render.i_width & 1 || p_vout->render.i_height & 1 )
65     {
66         return -1;
67     }
68
69     switch( p_vout->render.i_chroma )
70     {
71         case VLC_FOURCC('Y','8','0','0'):
72             p_vout->render.i_chroma = VLC_FOURCC('G','R','E','Y');
73         case VLC_FOURCC('G','R','E','Y'):
74             switch( p_vout->output.i_chroma )
75             {
76                 case VLC_FOURCC('I','4','2','0'):
77                     p_vout->chroma.pf_convert = GREY_I420;
78                     break;
79                 case VLC_FOURCC('Y','U','Y','2'):
80                     p_vout->chroma.pf_convert = GREY_YUY2;
81                     break;
82                 default:
83                     return -1;
84             }
85             break;
86
87         default:
88             return -1;
89     }
90
91     return 0;
92 }
93
94 /* Following functions are local */
95
96 /*****************************************************************************
97  * GREY_I420: 8-bit grayscale to planar YUV 4:2:0
98  *****************************************************************************/
99 static void GREY_I420( vout_thread_t *p_vout, picture_t *p_source,
100                                               picture_t *p_dest )
101 {
102     uint8_t *p_line = p_source->p->p_pixels;
103     uint8_t *p_y = p_dest->Y_PIXELS;
104     uint8_t *p_u = p_dest->U_PIXELS;
105     uint8_t *p_v = p_dest->V_PIXELS;
106
107     int i_x, i_y;
108
109     const int i_source_margin = p_source->p->i_pitch
110                                  - p_source->p->i_visible_pitch;
111     const int i_dest_margin = p_dest->p[0].i_pitch
112                                - p_dest->p[0].i_visible_pitch;
113     const int i_dest_margin_c = p_dest->p[1].i_pitch
114                                  - p_dest->p[1].i_visible_pitch;
115
116     for( i_y = p_vout->render.i_height / 2; i_y-- ; )
117     {
118         memset(p_u, 0x80, p_dest->p[1].i_visible_pitch);
119         p_u += i_dest_margin_c;
120
121         memset(p_v, 0x80, p_dest->p[1].i_visible_pitch);
122         p_v += i_dest_margin_c;
123     }
124
125     for( i_y = p_vout->render.i_height; i_y-- ; )
126     {
127         for( i_x = p_vout->render.i_width / 8; i_x-- ; )
128         {
129             *p_y++ = *p_line++; *p_y++ = *p_line++;
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         }
134
135         for( i_x = p_vout->render.i_width % 8; i_x-- ; )
136         {
137             *p_y++ = *p_line++;
138         }
139
140         p_line += i_source_margin;
141         p_y += i_dest_margin;
142     }
143 }
144
145 /*****************************************************************************
146  * GREY_YUY2: 8-bit grayscale to packed YUY2
147  *****************************************************************************/
148 static void GREY_YUY2( vout_thread_t *p_vout, picture_t *p_source,
149                                               picture_t *p_dest )
150 {
151     uint8_t *p_in = p_source->p->p_pixels;
152     uint8_t *p_out = p_dest->p->p_pixels;
153
154     int i_x, i_y;
155
156     const int i_source_margin = p_source->p->i_pitch
157                                  - p_source->p->i_visible_pitch;
158     const int i_dest_margin = p_dest->p->i_pitch
159                                - p_dest->p->i_visible_pitch;
160
161     for( i_y = p_vout->render.i_height; i_y-- ; )
162     {
163         for( i_x = p_vout->render.i_width / 8; i_x-- ; )
164         {
165             *p_out++ = *p_in++; *p_out++ = 0x80;
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         }
174
175         for( i_x = (p_vout->render.i_width % 8) / 2; i_x-- ; )
176         {
177             *p_out++ = *p_in++; *p_out++ = 0x80;
178             *p_out++ = *p_in++; *p_out++ = 0x80;
179         }
180
181         p_in += i_source_margin;
182         p_out += i_dest_margin;
183     }
184 }
185