Include vlc_plugin.h as needed
[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/vlc.h>
34 #include <vlc_plugin.h>
35 #include <vlc_vout.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( vout_thread_t *, picture_t *, picture_t * );
46 static void I422_YV12( vout_thread_t *, picture_t *, picture_t * );
47 static void I422_YUVA( vout_thread_t *, picture_t *, picture_t * );
48
49 /*****************************************************************************
50  * Module descriptor
51  *****************************************************************************/
52 vlc_module_begin();
53     set_description( _("Conversions from " SRC_FOURCC " to " DEST_FOURCC) );
54     set_capability( "chroma", 60 );
55     set_callbacks( Activate, NULL );
56 vlc_module_end();
57
58 /*****************************************************************************
59  * Activate: allocate a chroma function
60  *****************************************************************************
61  * This function allocates and initializes a chroma function
62  *****************************************************************************/
63 static int Activate( vlc_object_t *p_this )
64 {
65     vout_thread_t *p_vout = (vout_thread_t *)p_this;
66
67     if( p_vout->render.i_width & 1 || p_vout->render.i_height & 1 )
68     {
69         return -1;
70     }
71
72     switch( p_vout->render.i_chroma )
73     {
74         case VLC_FOURCC('I','4','2','2'):
75         case VLC_FOURCC('J','4','2','2'):
76             switch( p_vout->output.i_chroma )
77             {
78                 case VLC_FOURCC('I','4','2','0'):
79                 case VLC_FOURCC('I','Y','U','V'):
80                 case VLC_FOURCC('J','4','2','0'):
81                     p_vout->chroma.pf_convert = I422_I420;
82                     break;
83
84                 case VLC_FOURCC('Y','V','1','2'):
85                     p_vout->chroma.pf_convert = I422_YV12;
86                     break;
87
88                 case VLC_FOURCC('Y','U','V','A'):
89                     p_vout->chroma.pf_convert = I422_YUVA;
90                     break;
91
92                 default:
93                     return -1;
94             }
95             break;
96
97         default:
98             return -1;
99     }
100     return 0;
101 }
102
103 /* Following functions are local */
104
105 /*****************************************************************************
106  * I422_I420: planar YUV 4:2:2 to planar I420 4:2:0 Y:U:V
107  *****************************************************************************/
108 static void I422_I420( vout_thread_t *p_vout, picture_t *p_source,
109                                               picture_t *p_dest )
110 {
111     uint16_t i_dpy = p_dest->p[Y_PLANE].i_pitch;
112     uint16_t i_spy = p_source->p[Y_PLANE].i_pitch;
113     uint16_t i_dpuv = p_dest->p[U_PLANE].i_pitch;
114     uint16_t i_spuv = p_source->p[U_PLANE].i_pitch;
115     uint16_t i_width = p_vout->render.i_width;
116     uint16_t i_y = p_vout->render.i_height;
117     uint8_t *p_dy = p_dest->Y_PIXELS + (i_y-1)*i_dpy;
118     uint8_t *p_y = p_source->Y_PIXELS + (i_y-1)*i_spy;
119     uint8_t *p_du = p_dest->U_PIXELS + (i_y/2-1)*i_dpuv;
120     uint8_t *p_u = p_source->U_PIXELS + (i_y-1)*i_spuv;
121     uint8_t *p_dv = p_dest->V_PIXELS + (i_y/2-1)*i_dpuv;
122     uint8_t *p_v = p_source->V_PIXELS + (i_y-1)*i_spuv;
123     i_y /= 2;
124
125     for ( ; i_y--; )
126     {
127         vlc_memcpy(p_dy, p_y, i_width); p_dy -= i_dpy; p_y -= i_spy;
128         vlc_memcpy(p_dy, p_y, i_width); p_dy -= i_dpy; p_y -= i_spy;
129         vlc_memcpy(p_du, p_u, i_width/2); p_du -= i_dpuv; p_u -= 2*i_spuv;
130         vlc_memcpy(p_dv, p_v, i_width/2); p_dv -= i_dpuv; p_v -= 2*i_spuv;
131     }
132 }
133
134 /*****************************************************************************
135  * I422_YV12: planar YUV 4:2:2 to planar YV12 4:2:0 Y:V:U
136  *****************************************************************************/
137 static void I422_YV12( vout_thread_t *p_vout, picture_t *p_source,
138                                               picture_t *p_dest )
139 {
140     uint16_t i_dpy = p_dest->p[Y_PLANE].i_pitch;
141     uint16_t i_spy = p_source->p[Y_PLANE].i_pitch;
142     uint16_t i_dpuv = p_dest->p[U_PLANE].i_pitch;
143     uint16_t i_spuv = p_source->p[U_PLANE].i_pitch;
144     uint16_t i_width = p_vout->render.i_width;
145     uint16_t i_y = p_vout->render.i_height;
146     uint8_t *p_dy = p_dest->Y_PIXELS + (i_y-1)*i_dpy;
147     uint8_t *p_y = p_source->Y_PIXELS + (i_y-1)*i_spy;
148     uint8_t *p_du = p_dest->V_PIXELS + (i_y/2-1)*i_dpuv; /* U and V are swapped */
149     uint8_t *p_u = p_source->U_PIXELS + (i_y-1)*i_spuv;
150     uint8_t *p_dv = p_dest->U_PIXELS + (i_y/2-1)*i_dpuv; /* U and V are swapped */
151     uint8_t *p_v = p_source->V_PIXELS + (i_y-1)*i_spuv;
152     i_y /= 2;
153
154     for ( ; i_y--; )
155     {
156         vlc_memcpy(p_dy, p_y, i_width); p_dy -= i_dpy; p_y -= i_spy;
157         vlc_memcpy(p_dy, p_y, i_width); p_dy -= i_dpy; p_y -= i_spy;
158         vlc_memcpy(p_du, p_u, i_width/2); p_du -= i_dpuv; p_u -= 2*i_spuv;
159         vlc_memcpy(p_dv, p_v, i_width/2); p_dv -= i_dpuv; p_v -= 2*i_spuv;
160     }
161 }
162
163 /*****************************************************************************
164  * I422_YUVA: planar YUV 4:2:2 to planar YUVA 4:2:0:4 Y:U:V:A
165  *****************************************************************************/
166 static void I422_YUVA( vout_thread_t *p_vout, picture_t *p_source,
167                                               picture_t *p_dest )
168 {
169     I422_I420( p_vout, p_source, p_dest );
170     vlc_memset( p_dest->p[A_PLANE].p_pixels, 0xff,
171                 p_dest->p[A_PLANE].i_lines * p_dest->p[A_PLANE].i_pitch );
172 }