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
7 * Authors: Samuel Hocevar <sam@zoy.org>
8 * Damien Fouilleul <damienf@videolan.org>
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.
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.
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 *****************************************************************************/
25 /*****************************************************************************
27 *****************************************************************************/
33 #include <vlc_common.h>
34 #include <vlc_plugin.h>
35 #include <vlc_filter.h>
38 #define SRC_FOURCC "I422,J422"
39 #define DEST_FOURCC "I420,IYUV,J420,YV12,YUVA"
41 /*****************************************************************************
42 * Local and extern prototypes.
43 *****************************************************************************/
44 static int Activate ( vlc_object_t * );
46 static void I422_I420( filter_t *, picture_t *, picture_t * );
47 static void I422_YV12( filter_t *, picture_t *, picture_t * );
48 static void I422_YUVA( filter_t *, picture_t *, picture_t * );
49 static picture_t *I422_I420_Filter( filter_t *, picture_t * );
50 static picture_t *I422_YV12_Filter( filter_t *, picture_t * );
51 static picture_t *I422_YUVA_Filter( filter_t *, picture_t * );
53 /*****************************************************************************
55 *****************************************************************************/
57 set_description( N_("Conversions from " SRC_FOURCC " to " DEST_FOURCC) );
58 set_capability( "video filter2", 60 );
59 set_callbacks( Activate, NULL );
62 /*****************************************************************************
63 * Activate: allocate a chroma function
64 *****************************************************************************
65 * This function allocates and initializes a chroma function
66 *****************************************************************************/
67 static int Activate( vlc_object_t *p_this )
69 filter_t *p_filter = (filter_t *)p_this;
71 if( p_filter->fmt_in.video.i_width & 1
72 || p_filter->fmt_in.video.i_height & 1 )
77 switch( p_filter->fmt_in.video.i_chroma )
79 case VLC_FOURCC('I','4','2','2'):
80 case VLC_FOURCC('J','4','2','2'):
81 switch( p_filter->fmt_out.video.i_chroma )
83 case VLC_FOURCC('I','4','2','0'):
84 case VLC_FOURCC('I','Y','U','V'):
85 case VLC_FOURCC('J','4','2','0'):
86 p_filter->pf_video_filter = I422_I420_Filter;
89 case VLC_FOURCC('Y','V','1','2'):
90 p_filter->pf_video_filter = I422_YV12_Filter;
93 case VLC_FOURCC('Y','U','V','A'):
94 p_filter->pf_video_filter = I422_YUVA_Filter;
108 /* Following functions are local */
109 VIDEO_FILTER_WRAPPER( I422_I420 )
110 VIDEO_FILTER_WRAPPER( I422_YV12 )
111 VIDEO_FILTER_WRAPPER( I422_YUVA )
113 /*****************************************************************************
114 * I422_I420: planar YUV 4:2:2 to planar I420 4:2:0 Y:U:V
115 *****************************************************************************/
116 static void I422_I420( filter_t *p_filter, picture_t *p_source,
119 uint16_t i_dpy = p_dest->p[Y_PLANE].i_pitch;
120 uint16_t i_spy = p_source->p[Y_PLANE].i_pitch;
121 uint16_t i_dpuv = p_dest->p[U_PLANE].i_pitch;
122 uint16_t i_spuv = p_source->p[U_PLANE].i_pitch;
123 uint16_t i_width = p_filter->fmt_in.video.i_width;
124 uint16_t i_y = p_filter->fmt_in.video.i_height;
125 uint8_t *p_dy = p_dest->Y_PIXELS + (i_y-1)*i_dpy;
126 uint8_t *p_y = p_source->Y_PIXELS + (i_y-1)*i_spy;
127 uint8_t *p_du = p_dest->U_PIXELS + (i_y/2-1)*i_dpuv;
128 uint8_t *p_u = p_source->U_PIXELS + (i_y-1)*i_spuv;
129 uint8_t *p_dv = p_dest->V_PIXELS + (i_y/2-1)*i_dpuv;
130 uint8_t *p_v = p_source->V_PIXELS + (i_y-1)*i_spuv;
135 vlc_memcpy(p_dy, p_y, i_width); p_dy -= i_dpy; p_y -= i_spy;
136 vlc_memcpy(p_dy, p_y, i_width); p_dy -= i_dpy; p_y -= i_spy;
137 vlc_memcpy(p_du, p_u, i_width/2); p_du -= i_dpuv; p_u -= 2*i_spuv;
138 vlc_memcpy(p_dv, p_v, i_width/2); p_dv -= i_dpuv; p_v -= 2*i_spuv;
142 /*****************************************************************************
143 * I422_YV12: planar YUV 4:2:2 to planar YV12 4:2:0 Y:V:U
144 *****************************************************************************/
145 static void I422_YV12( filter_t *p_filter, picture_t *p_source,
148 uint16_t i_dpy = p_dest->p[Y_PLANE].i_pitch;
149 uint16_t i_spy = p_source->p[Y_PLANE].i_pitch;
150 uint16_t i_dpuv = p_dest->p[U_PLANE].i_pitch;
151 uint16_t i_spuv = p_source->p[U_PLANE].i_pitch;
152 uint16_t i_width = p_filter->fmt_in.video.i_width;
153 uint16_t i_y = p_filter->fmt_in.video.i_height;
154 uint8_t *p_dy = p_dest->Y_PIXELS + (i_y-1)*i_dpy;
155 uint8_t *p_y = p_source->Y_PIXELS + (i_y-1)*i_spy;
156 uint8_t *p_du = p_dest->V_PIXELS + (i_y/2-1)*i_dpuv; /* U and V are swapped */
157 uint8_t *p_u = p_source->U_PIXELS + (i_y-1)*i_spuv;
158 uint8_t *p_dv = p_dest->U_PIXELS + (i_y/2-1)*i_dpuv; /* U and V are swapped */
159 uint8_t *p_v = p_source->V_PIXELS + (i_y-1)*i_spuv;
164 vlc_memcpy(p_dy, p_y, i_width); p_dy -= i_dpy; p_y -= i_spy;
165 vlc_memcpy(p_dy, p_y, i_width); p_dy -= i_dpy; p_y -= i_spy;
166 vlc_memcpy(p_du, p_u, i_width/2); p_du -= i_dpuv; p_u -= 2*i_spuv;
167 vlc_memcpy(p_dv, p_v, i_width/2); p_dv -= i_dpuv; p_v -= 2*i_spuv;
171 /*****************************************************************************
172 * I422_YUVA: planar YUV 4:2:2 to planar YUVA 4:2:0:4 Y:U:V:A
173 *****************************************************************************/
174 static void I422_YUVA( filter_t *p_filter, picture_t *p_source,
177 I422_I420( p_filter, p_source, p_dest );
178 vlc_memset( p_dest->p[A_PLANE].p_pixels, 0xff,
179 p_dest->p[A_PLANE].i_lines * p_dest->p[A_PLANE].i_pitch );