Remove stdlib.h
[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 #include <string.h>                                            /* strerror() */
28
29 #include <vlc/vlc.h>
30 #include <vlc_vout.h>
31
32 #define SRC_FOURCC  "GREY"
33 #define DEST_FOURCC "I420,YUY2"
34
35 /*****************************************************************************
36  * Local and extern prototypes.
37  *****************************************************************************/
38 static int  Activate ( vlc_object_t * );
39
40 static void GREY_I420           ( vout_thread_t *, picture_t *, picture_t * );
41 static void GREY_YUY2           ( vout_thread_t *, picture_t *, picture_t * );
42
43 /*****************************************************************************
44  * Module descriptor.
45  *****************************************************************************/
46 vlc_module_begin();
47     set_description( _("Conversions from " SRC_FOURCC " to " DEST_FOURCC) );
48     set_capability( "chroma", 80 );
49     set_callbacks( Activate, NULL );
50 vlc_module_end();
51
52 /*****************************************************************************
53  * Activate: allocate a chroma function
54  *****************************************************************************
55  * This function allocates and initializes a chroma function
56  *****************************************************************************/
57 static int Activate( vlc_object_t *p_this )
58 {
59     vout_thread_t *p_vout = (vout_thread_t *)p_this;
60
61     if( p_vout->render.i_width & 1 || p_vout->render.i_height & 1 )
62     {
63         return -1;
64     }
65
66     switch( p_vout->render.i_chroma )
67     {
68         case VLC_FOURCC('G','R','E','Y'):
69             switch( p_vout->output.i_chroma )
70             {
71                 case VLC_FOURCC('I','4','2','0'):
72                     p_vout->chroma.pf_convert = GREY_I420;
73                     break;
74                 case VLC_FOURCC('Y','U','Y','2'):
75                     p_vout->chroma.pf_convert = GREY_YUY2;
76                     break;
77                 default:
78                     return -1;
79             }
80             break;
81
82         default:
83             return -1;
84     }
85
86     return 0;
87 }
88
89 /* Following functions are local */
90
91 /*****************************************************************************
92  * GREY_I420: 8-bit grayscale to planar YUV 4:2:0
93  *****************************************************************************/
94 static void GREY_I420( vout_thread_t *p_vout, picture_t *p_source,
95                                               picture_t *p_dest )
96 {
97     uint8_t *p_line = p_source->p->p_pixels;
98     uint8_t *p_y = p_dest->Y_PIXELS;
99     uint8_t *p_u = p_dest->U_PIXELS;
100     uint8_t *p_v = p_dest->V_PIXELS;
101
102     int i_x, i_y;
103
104     const int i_source_margin = p_source->p->i_pitch
105                                  - p_source->p->i_visible_pitch;
106     const int i_dest_margin = p_dest->p[0].i_pitch
107                                - p_dest->p[0].i_visible_pitch;
108     const int i_dest_margin_c = p_dest->p[1].i_pitch
109                                  - p_dest->p[1].i_visible_pitch;
110
111     for( i_y = p_vout->render.i_height / 2; i_y-- ; )
112     {
113         memset(p_u, 0x80, p_dest->p[1].i_visible_pitch);
114         p_u += i_dest_margin_c;
115
116         memset(p_v, 0x80, p_dest->p[1].i_visible_pitch);
117         p_v += i_dest_margin_c;
118     }
119
120     for( i_y = p_vout->render.i_height; i_y-- ; )
121     {
122         for( i_x = p_vout->render.i_width / 8; i_x-- ; )
123         {
124             *p_y++ = *p_line++; *p_y++ = *p_line++;
125             *p_y++ = *p_line++; *p_y++ = *p_line++;
126             *p_y++ = *p_line++; *p_y++ = *p_line++;
127             *p_y++ = *p_line++; *p_y++ = *p_line++;
128         }
129
130         for( i_x = p_vout->render.i_width % 8; i_x-- ; )
131         {
132             *p_y++ = *p_line++;
133         }
134
135         p_line += i_source_margin;
136         p_y += i_dest_margin;
137     }
138 }
139
140 /*****************************************************************************
141  * GREY_YUY2: 8-bit grayscale to packed YUY2
142  *****************************************************************************/
143 static void GREY_YUY2( vout_thread_t *p_vout, picture_t *p_source,
144                                               picture_t *p_dest )
145 {
146     uint8_t *p_in = p_source->p->p_pixels;
147     uint8_t *p_out = p_dest->p->p_pixels;
148
149     int i_x, i_y;
150
151     const int i_source_margin = p_source->p->i_pitch
152                                  - p_source->p->i_visible_pitch;
153     const int i_dest_margin = p_dest->p->i_pitch
154                                - p_dest->p->i_visible_pitch;
155
156     for( i_y = p_vout->render.i_height; i_y-- ; )
157     {
158         for( i_x = p_vout->render.i_width / 8; i_x-- ; )
159         {
160             *p_out++ = *p_in++; *p_out++ = 0x80;
161             *p_out++ = *p_in++; *p_out++ = 0x80;
162             *p_out++ = *p_in++; *p_out++ = 0x80;
163             *p_out++ = *p_in++; *p_out++ = 0x80;
164             *p_out++ = *p_in++; *p_out++ = 0x80;
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         }
169
170         for( i_x = (p_vout->render.i_width % 8) / 2; i_x-- ; )
171         {
172             *p_out++ = *p_in++; *p_out++ = 0x80;
173             *p_out++ = *p_in++; *p_out++ = 0x80;
174         }
175
176         p_in += i_source_margin;
177         p_out += i_dest_margin;
178     }
179 }
180