Fixed csri decoder integration.
[vlc.git] / modules / video_chroma / i422_i420.c
1 /*****************************************************************************
2  * i422_i420.c : Planar YUV 4:2:2 to Planar YUV 4:2:0 conversion module for vlc
3  *****************************************************************************
4  * Copyright (C) 2000, 2001 - 2007 the VideoLAN team
5  * $Id$
6  *
7  * Authors: Samuel Hocevar <sam@zoy.org>
8  *          Damien Fouilleul <damienf@videolan.org>
9  *
10  * This program is free software; you can redistribute it and/or modify
11  * it under the terms of the GNU General Public License as published by
12  * the Free Software Foundation; either version 2 of the License, or
13  * (at your option) any later version.
14  *
15  * This program is distributed in the hope that it will be useful,
16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18  * GNU General Public License for more details.
19  *
20  * You should have received a copy of the GNU General Public License
21  * along with this program; if not, write to the Free Software
22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
23  *****************************************************************************/
24
25 /*****************************************************************************
26  * Preamble
27  *****************************************************************************/
28
29 #ifdef HAVE_CONFIG_H
30 # include "config.h"
31 #endif
32
33 #include <vlc_common.h>
34 #include <vlc_plugin.h>
35 #include <vlc_filter.h>
36
37 #define SRC_FOURCC  "I422,J422"
38 #define DEST_FOURCC "I420,IYUV,J420,YV12,YUVA"
39
40 /*****************************************************************************
41  * Local and extern prototypes.
42  *****************************************************************************/
43 static int  Activate ( vlc_object_t * );
44
45 static void I422_I420( filter_t *, picture_t *, picture_t * );
46 static void I422_YV12( filter_t *, picture_t *, picture_t * );
47 static void I422_YUVA( filter_t *, picture_t *, picture_t * );
48 static picture_t *I422_I420_Filter( filter_t *, picture_t * );
49 static picture_t *I422_YV12_Filter( filter_t *, picture_t * );
50 static picture_t *I422_YUVA_Filter( filter_t *, picture_t * );
51
52 /*****************************************************************************
53  * Module descriptor
54  *****************************************************************************/
55 vlc_module_begin ()
56     set_description( N_("Conversions from " SRC_FOURCC " to " DEST_FOURCC) )
57     set_capability( "video filter2", 60 )
58     set_callbacks( Activate, NULL )
59 vlc_module_end ()
60
61 /*****************************************************************************
62  * Activate: allocate a chroma function
63  *****************************************************************************
64  * This function allocates and initializes a chroma function
65  *****************************************************************************/
66 static int Activate( vlc_object_t *p_this )
67 {
68     filter_t *p_filter = (filter_t *)p_this;
69
70     if( p_filter->fmt_in.video.i_width & 1
71      || p_filter->fmt_in.video.i_height & 1 )
72     {
73         return -1;
74     }
75
76     if( p_filter->fmt_in.video.i_width != p_filter->fmt_out.video.i_width
77      || p_filter->fmt_in.video.i_height != p_filter->fmt_out.video.i_height )
78         return -1;
79
80     switch( p_filter->fmt_in.video.i_chroma )
81     {
82         case VLC_CODEC_I422:
83         case VLC_CODEC_J422:
84             switch( p_filter->fmt_out.video.i_chroma )
85             {
86                 case VLC_CODEC_I420:
87                 case VLC_CODEC_J420:
88                     p_filter->pf_video_filter = I422_I420_Filter;
89                     break;
90
91                 case VLC_CODEC_YV12:
92                     p_filter->pf_video_filter = I422_YV12_Filter;
93                     break;
94
95                 case VLC_CODEC_YUVA:
96                     p_filter->pf_video_filter = I422_YUVA_Filter;
97                     break;
98
99                 default:
100                     return -1;
101             }
102             break;
103
104         default:
105             return -1;
106     }
107     return 0;
108 }
109
110 /* Following functions are local */
111 VIDEO_FILTER_WRAPPER( I422_I420 )
112 VIDEO_FILTER_WRAPPER( I422_YV12 )
113 VIDEO_FILTER_WRAPPER( I422_YUVA )
114
115 /*****************************************************************************
116  * I422_I420: planar YUV 4:2:2 to planar I420 4:2:0 Y:U:V
117  *****************************************************************************/
118 static void I422_I420( filter_t *p_filter, picture_t *p_source,
119                                            picture_t *p_dest )
120 {
121     uint16_t i_dpy = p_dest->p[Y_PLANE].i_pitch;
122     uint16_t i_spy = p_source->p[Y_PLANE].i_pitch;
123     uint16_t i_dpuv = p_dest->p[U_PLANE].i_pitch;
124     uint16_t i_spuv = p_source->p[U_PLANE].i_pitch;
125     uint16_t i_width = p_filter->fmt_in.video.i_width;
126     uint16_t i_y = p_filter->fmt_in.video.i_height;
127     uint8_t *p_dy = p_dest->Y_PIXELS + (i_y-1)*i_dpy;
128     uint8_t *p_y = p_source->Y_PIXELS + (i_y-1)*i_spy;
129     uint8_t *p_du = p_dest->U_PIXELS + (i_y/2-1)*i_dpuv;
130     uint8_t *p_u = p_source->U_PIXELS + (i_y-1)*i_spuv;
131     uint8_t *p_dv = p_dest->V_PIXELS + (i_y/2-1)*i_dpuv;
132     uint8_t *p_v = p_source->V_PIXELS + (i_y-1)*i_spuv;
133     i_y /= 2;
134
135     for ( ; i_y--; )
136     {
137         vlc_memcpy(p_dy, p_y, i_width); p_dy -= i_dpy; p_y -= i_spy;
138         vlc_memcpy(p_dy, p_y, i_width); p_dy -= i_dpy; p_y -= i_spy;
139         vlc_memcpy(p_du, p_u, i_width/2); p_du -= i_dpuv; p_u -= 2*i_spuv;
140         vlc_memcpy(p_dv, p_v, i_width/2); p_dv -= i_dpuv; p_v -= 2*i_spuv;
141     }
142 }
143
144 /*****************************************************************************
145  * I422_YV12: planar YUV 4:2:2 to planar YV12 4:2:0 Y:V:U
146  *****************************************************************************/
147 static void I422_YV12( filter_t *p_filter, picture_t *p_source,
148                                            picture_t *p_dest )
149 {
150     uint16_t i_dpy = p_dest->p[Y_PLANE].i_pitch;
151     uint16_t i_spy = p_source->p[Y_PLANE].i_pitch;
152     uint16_t i_dpuv = p_dest->p[U_PLANE].i_pitch;
153     uint16_t i_spuv = p_source->p[U_PLANE].i_pitch;
154     uint16_t i_width = p_filter->fmt_in.video.i_width;
155     uint16_t i_y = p_filter->fmt_in.video.i_height;
156     uint8_t *p_dy = p_dest->Y_PIXELS + (i_y-1)*i_dpy;
157     uint8_t *p_y = p_source->Y_PIXELS + (i_y-1)*i_spy;
158     uint8_t *p_du = p_dest->V_PIXELS + (i_y/2-1)*i_dpuv; /* U and V are swapped */
159     uint8_t *p_u = p_source->U_PIXELS + (i_y-1)*i_spuv;
160     uint8_t *p_dv = p_dest->U_PIXELS + (i_y/2-1)*i_dpuv; /* U and V are swapped */
161     uint8_t *p_v = p_source->V_PIXELS + (i_y-1)*i_spuv;
162     i_y /= 2;
163
164     for ( ; i_y--; )
165     {
166         vlc_memcpy(p_dy, p_y, i_width); p_dy -= i_dpy; p_y -= i_spy;
167         vlc_memcpy(p_dy, p_y, i_width); p_dy -= i_dpy; p_y -= i_spy;
168         vlc_memcpy(p_du, p_u, i_width/2); p_du -= i_dpuv; p_u -= 2*i_spuv;
169         vlc_memcpy(p_dv, p_v, i_width/2); p_dv -= i_dpuv; p_v -= 2*i_spuv;
170     }
171 }
172
173 /*****************************************************************************
174  * I422_YUVA: planar YUV 4:2:2 to planar YUVA 4:2:0:4 Y:U:V:A
175  *****************************************************************************/
176 static void I422_YUVA( filter_t *p_filter, picture_t *p_source,
177                                            picture_t *p_dest )
178 {
179     I422_I420( p_filter, p_source, p_dest );
180     vlc_memset( p_dest->p[A_PLANE].p_pixels, 0xff,
181                 p_dest->p[A_PLANE].i_lines * p_dest->p[A_PLANE].i_pitch );
182 }