1 /*****************************************************************************
2 * filter_picture.h: Common picture functions for filters
3 *****************************************************************************
4 * Copyright (C) 2007 the VideoLAN team
7 * Authors: Antoine Cellerier <dionoea at videolan dot org>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
22 *****************************************************************************/
24 /* FIXME: do all of these really have square pixels? */
25 #define CASE_PLANAR_YUV_SQUARE \
26 case VLC_CODEC_I420: \
27 case VLC_CODEC_J420: \
28 case VLC_CODEC_YV12: \
29 case VLC_CODEC_I411: \
30 case VLC_CODEC_I410: \
31 case VLC_CODEC_I444: \
32 case VLC_CODEC_J444: \
35 #define CASE_PLANAR_YUV_NONSQUARE \
36 case VLC_CODEC_I422: \
39 #define CASE_PLANAR_YUV \
40 CASE_PLANAR_YUV_SQUARE \
41 CASE_PLANAR_YUV_NONSQUARE \
43 #define CASE_PACKED_YUV_422 \
44 case VLC_CODEC_UYVY: \
45 case VLC_CODEC_CYUV: \
46 case VLC_CODEC_YUYV: \
49 static inline int GetPackedYuvOffsets( vlc_fourcc_t i_chroma,
50 int *i_y_offset, int *i_u_offset, int *i_v_offset )
55 case VLC_CODEC_CYUV: /* <-- FIXME: reverted, whatever that means */
84 static inline int GetPackedRgbIndexes( const video_format_t *p_fmt, int *i_r_index,
85 int *i_g_index, int *i_b_index )
87 if( p_fmt->i_chroma != VLC_CODEC_RGB24 && p_fmt->i_chroma != VLC_CODEC_RGB32 )
90 #ifdef WORDS_BIGENDIAN
91 const int i_mask_bits = p_fmt->i_chroma == VLC_CODEC_RGB24 ? 24 : 32;
92 *i_r_index = ( i_mask_bits - p_fmt->i_lrshift ) / 8;
93 *i_g_index = ( i_mask_bits - p_fmt->i_lgshift ) / 8;
94 *i_b_index = ( i_mask_bits - p_fmt->i_lbshift ) / 8;
96 *i_r_index = p_fmt->i_lrshift / 8;
97 *i_g_index = p_fmt->i_lgshift / 8;
98 *i_b_index = p_fmt->i_lbshift / 8;
103 static inline uint8_t vlc_uint8( int v )
112 static inline void yuv_to_rgb( int *r, int *g, int *b,
113 uint8_t y1, uint8_t u1, uint8_t v1 )
115 /* macros used for YUV pixel conversions */
116 # define SCALEBITS 10
117 # define ONE_HALF (1 << (SCALEBITS - 1))
118 # define FIX(x) ((int) ((x) * (1<<SCALEBITS) + 0.5))
120 int y, cb, cr, r_add, g_add, b_add;
124 r_add = FIX(1.40200*255.0/224.0) * cr + ONE_HALF;
125 g_add = - FIX(0.34414*255.0/224.0) * cb
126 - FIX(0.71414*255.0/224.0) * cr + ONE_HALF;
127 b_add = FIX(1.77200*255.0/224.0) * cb + ONE_HALF;
128 y = (y1 - 16) * FIX(255.0/219.0);
129 *r = vlc_uint8( (y + r_add) >> SCALEBITS );
130 *g = vlc_uint8( (y + g_add) >> SCALEBITS );
131 *b = vlc_uint8( (y + b_add) >> SCALEBITS );
137 static inline void rgb_to_yuv( uint8_t *y, uint8_t *u, uint8_t *v,
138 int r, int g, int b )
140 *y = ( ( ( 66 * r + 129 * g + 25 * b + 128 ) >> 8 ) + 16 );
141 *u = ( ( -38 * r - 74 * g + 112 * b + 128 ) >> 8 ) + 128 ;
142 *v = ( ( 112 * r - 94 * g - 18 * b + 128 ) >> 8 ) + 128 ;
145 /*****************************************************************************
147 *****************************************************************************/
148 static inline picture_t *CopyInfoAndRelease( picture_t *p_outpic, picture_t *p_inpic )
150 picture_CopyProperties( p_outpic, p_inpic );
152 picture_Release( p_inpic );