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>
37 #define SRC_FOURCC "I422,J422"
38 #define DEST_FOURCC "I420,IYUV,J420,YV12,YUVA"
40 /*****************************************************************************
41 * Local and extern prototypes.
42 *****************************************************************************/
43 static int Activate ( vlc_object_t * );
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 * );
52 /*****************************************************************************
54 *****************************************************************************/
56 set_description( N_("Conversions from " SRC_FOURCC " to " DEST_FOURCC) )
57 set_capability( "video filter2", 60 )
58 set_callbacks( Activate, NULL )
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 )
68 filter_t *p_filter = (filter_t *)p_this;
70 if( p_filter->fmt_in.video.i_width & 1
71 || p_filter->fmt_in.video.i_height & 1 )
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 )
80 switch( p_filter->fmt_in.video.i_chroma )
84 switch( p_filter->fmt_out.video.i_chroma )
88 p_filter->pf_video_filter = I422_I420_Filter;
92 p_filter->pf_video_filter = I422_YV12_Filter;
96 p_filter->pf_video_filter = I422_YUVA_Filter;
110 /* Following functions are local */
111 VIDEO_FILTER_WRAPPER( I422_I420 )
112 VIDEO_FILTER_WRAPPER( I422_YV12 )
113 VIDEO_FILTER_WRAPPER( I422_YUVA )
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,
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;
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;
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,
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;
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;
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,
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 );