Fixed csri decoder integration.
[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, 2008 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_common.h>
33 #include <vlc_plugin.h>
34 #include <vlc_filter.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( filter_t *, picture_t *, picture_t * );
45 static void GREY_YUY2( filter_t *, picture_t *, picture_t * );
46
47 static picture_t *GREY_I420_Filter( filter_t *, picture_t * );
48 static picture_t *GREY_YUY2_Filter( filter_t *, picture_t * );
49
50 /*****************************************************************************
51  * Module descriptor.
52  *****************************************************************************/
53 vlc_module_begin ()
54     set_description( N_("Conversions from " SRC_FOURCC " to " DEST_FOURCC) )
55     set_capability( "video filter2", 80 )
56     set_callbacks( Activate, NULL )
57 vlc_module_end ()
58
59 /*****************************************************************************
60  * Activate: allocate a chroma function
61  *****************************************************************************
62  * This function allocates and initializes a chroma function
63  *****************************************************************************/
64 static int Activate( vlc_object_t *p_this )
65 {
66     filter_t *p_filter = (filter_t *)p_this;
67
68     if( p_filter->fmt_out.video.i_width & 1
69      || p_filter->fmt_out.video.i_height & 1 )
70     {
71         return -1;
72     }
73
74     if( p_filter->fmt_in.video.i_width != p_filter->fmt_out.video.i_width
75      || p_filter->fmt_in.video.i_height != p_filter->fmt_out.video.i_height )
76         return -1;
77
78     switch( p_filter->fmt_in.video.i_chroma )
79     {
80         case VLC_CODEC_GREY:
81             switch( p_filter->fmt_out.video.i_chroma )
82             {
83                 case VLC_CODEC_I420:
84                     p_filter->pf_video_filter = GREY_I420_Filter;
85                     break;
86                 case VLC_CODEC_YUYV:
87                     p_filter->pf_video_filter = GREY_YUY2_Filter;
88                     break;
89                 default:
90                     return -1;
91             }
92             break;
93
94         default:
95             return -1;
96     }
97
98     return 0;
99 }
100
101 VIDEO_FILTER_WRAPPER( GREY_I420 )
102 VIDEO_FILTER_WRAPPER( GREY_YUY2 )
103
104 /* Following functions are local */
105
106 /*****************************************************************************
107  * GREY_I420: 8-bit grayscale to planar YUV 4:2:0
108  *****************************************************************************/
109 static void GREY_I420( filter_t *p_filter, picture_t *p_source,
110                                            picture_t *p_dest )
111 {
112     uint8_t *p_line = p_source->p->p_pixels;
113     uint8_t *p_y = p_dest->Y_PIXELS;
114     uint8_t *p_u = p_dest->U_PIXELS;
115     uint8_t *p_v = p_dest->V_PIXELS;
116
117     int i_x, i_y;
118
119     const int i_source_margin = p_source->p->i_pitch
120                                  - p_source->p->i_visible_pitch;
121     const int i_dest_margin = p_dest->p[0].i_pitch
122                                - p_dest->p[0].i_visible_pitch;
123     const int i_dest_margin_c = p_dest->p[1].i_pitch
124                                  - p_dest->p[1].i_visible_pitch;
125
126     for( i_y = p_filter->fmt_in.video.i_height / 2; i_y-- ; )
127     {
128         memset(p_u, 0x80, p_dest->p[1].i_visible_pitch);
129         p_u += i_dest_margin_c;
130
131         memset(p_v, 0x80, p_dest->p[1].i_visible_pitch);
132         p_v += i_dest_margin_c;
133     }
134
135     for( i_y = p_filter->fmt_in.video.i_height; i_y-- ; )
136     {
137         for( i_x = p_filter->fmt_in.video.i_width / 8; i_x-- ; )
138         {
139             *p_y++ = *p_line++; *p_y++ = *p_line++;
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         }
144
145         for( i_x = p_filter->fmt_in.video.i_width % 8; i_x-- ; )
146         {
147             *p_y++ = *p_line++;
148         }
149
150         p_line += i_source_margin;
151         p_y += i_dest_margin;
152     }
153 }
154
155 /*****************************************************************************
156  * GREY_YUY2: 8-bit grayscale to packed YUY2
157  *****************************************************************************/
158 static void GREY_YUY2( filter_t *p_filter, picture_t *p_source,
159                                            picture_t *p_dest )
160 {
161     uint8_t *p_in = p_source->p->p_pixels;
162     uint8_t *p_out = p_dest->p->p_pixels;
163
164     int i_x, i_y;
165
166     const int i_source_margin = p_source->p->i_pitch
167                                  - p_source->p->i_visible_pitch;
168     const int i_dest_margin = p_dest->p->i_pitch
169                                - p_dest->p->i_visible_pitch;
170
171     for( i_y = p_filter->fmt_out.video.i_height; i_y-- ; )
172     {
173         for( i_x = p_filter->fmt_out.video.i_width / 8; i_x-- ; )
174         {
175             *p_out++ = *p_in++; *p_out++ = 0x80;
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         }
184
185         for( i_x = (p_filter->fmt_out.video.i_width % 8) / 2; i_x-- ; )
186         {
187             *p_out++ = *p_in++; *p_out++ = 0x80;
188             *p_out++ = *p_in++; *p_out++ = 0x80;
189         }
190
191         p_in += i_source_margin;
192         p_out += i_dest_margin;
193     }
194 }
195