Don't include config.h from the headers - refs #297.
[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_vout.h>
35
36 #define SRC_FOURCC  "I422,J422"
37 #define DEST_FOURCC "I420,IYUV,J420,YV12,YUVA"
38
39 /*****************************************************************************
40  * Local and extern prototypes.
41  *****************************************************************************/
42 static int  Activate ( vlc_object_t * );
43
44 static void I422_I420( vout_thread_t *, picture_t *, picture_t * );
45 static void I422_YV12( vout_thread_t *, picture_t *, picture_t * );
46 static void I422_YUVA( vout_thread_t *, picture_t *, picture_t * );
47
48 /*****************************************************************************
49  * Module descriptor
50  *****************************************************************************/
51 vlc_module_begin();
52     set_description( _("Conversions from " SRC_FOURCC " to " DEST_FOURCC) );
53     set_capability( "chroma", 60 );
54     set_callbacks( Activate, NULL );
55 vlc_module_end();
56
57 /*****************************************************************************
58  * Activate: allocate a chroma function
59  *****************************************************************************
60  * This function allocates and initializes a chroma function
61  *****************************************************************************/
62 static int Activate( vlc_object_t *p_this )
63 {
64     vout_thread_t *p_vout = (vout_thread_t *)p_this;
65
66     if( p_vout->render.i_width & 1 || p_vout->render.i_height & 1 )
67     {
68         return -1;
69     }
70
71     switch( p_vout->render.i_chroma )
72     {
73         case VLC_FOURCC('I','4','2','2'):
74         case VLC_FOURCC('J','4','2','2'):
75             switch( p_vout->output.i_chroma )
76             {
77                 case VLC_FOURCC('I','4','2','0'):
78                 case VLC_FOURCC('I','Y','U','V'):
79                 case VLC_FOURCC('J','4','2','0'):
80                     p_vout->chroma.pf_convert = I422_I420;
81                     break;
82
83                 case VLC_FOURCC('Y','V','1','2'):
84                     p_vout->chroma.pf_convert = I422_YV12;
85                     break;
86
87                 case VLC_FOURCC('Y','U','V','A'):
88                     p_vout->chroma.pf_convert = I422_YUVA;
89                     break;
90
91                 default:
92                     return -1;
93             }
94             break;
95
96         default:
97             return -1;
98     }
99     return 0;
100 }
101
102 /* Following functions are local */
103
104 /*****************************************************************************
105  * I422_I420: planar YUV 4:2:2 to planar I420 4:2:0 Y:U:V
106  *****************************************************************************/
107 static void I422_I420( vout_thread_t *p_vout, picture_t *p_source,
108                                               picture_t *p_dest )
109 {
110     uint16_t i_dpy = p_dest->p[Y_PLANE].i_pitch;
111     uint16_t i_spy = p_source->p[Y_PLANE].i_pitch;
112     uint16_t i_dpuv = p_dest->p[U_PLANE].i_pitch;
113     uint16_t i_spuv = p_source->p[U_PLANE].i_pitch;
114     uint16_t i_width = p_vout->render.i_width;
115     uint16_t i_y = p_vout->render.i_height;
116     uint8_t *p_dy = p_dest->Y_PIXELS + (i_y-1)*i_dpy;
117     uint8_t *p_y = p_source->Y_PIXELS + (i_y-1)*i_spy;
118     uint8_t *p_du = p_dest->U_PIXELS + (i_y/2-1)*i_dpuv;
119     uint8_t *p_u = p_source->U_PIXELS + (i_y-1)*i_spuv;
120     uint8_t *p_dv = p_dest->V_PIXELS + (i_y/2-1)*i_dpuv;
121     uint8_t *p_v = p_source->V_PIXELS + (i_y-1)*i_spuv;
122     void *(*pf_memcpy)(void *, const void *, size_t) = p_vout->p_libvlc->pf_memcpy;
123     i_y /= 2;
124
125     for ( ; i_y--; )
126     {
127         pf_memcpy(p_dy, p_y, i_width); p_dy -= i_dpy; p_y -= i_spy;
128         pf_memcpy(p_dy, p_y, i_width); p_dy -= i_dpy; p_y -= i_spy;
129         pf_memcpy(p_du, p_u, i_width/2); p_du -= i_dpuv; p_u -= 2*i_spuv;
130         pf_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     void *(*pf_memcpy)(void *, const void *, size_t) = p_vout->p_libvlc->pf_memcpy;
153     i_y /= 2;
154
155     for ( ; i_y--; )
156     {
157         pf_memcpy(p_dy, p_y, i_width); p_dy -= i_dpy; p_y -= i_spy;
158         pf_memcpy(p_dy, p_y, i_width); p_dy -= i_dpy; p_y -= i_spy;
159         pf_memcpy(p_du, p_u, i_width/2); p_du -= i_dpuv; p_u -= 2*i_spuv;
160         pf_memcpy(p_dv, p_v, i_width/2); p_dv -= i_dpuv; p_v -= 2*i_spuv;
161     }
162 }
163
164 /*****************************************************************************
165  * I422_YUVA: planar YUV 4:2:2 to planar YUVA 4:2:0:4 Y:U:V:A
166  *****************************************************************************/
167 static void I422_YUVA( vout_thread_t *p_vout, picture_t *p_source,
168                                               picture_t *p_dest )
169 {
170     I422_I420( p_vout, p_source, p_dest );
171     p_vout->p_libvlc->pf_memset( p_dest->p[A_PLANE].p_pixels, 0xff,
172                                  p_dest->p[A_PLANE].i_lines
173                                  * p_dest->p[A_PLANE].i_pitch );
174 }