2 * Copyright (C) 2001-2003 Michael Niedermayer <michaelni@gmx.at>
4 * This file is part of FFmpeg.
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 #ifndef SWSCALE_SWSCALE_H
22 #define SWSCALE_SWSCALE_H
25 * @file libswscale/swscale.h
27 * external api for the swscale stuff
30 #include "libavutil/avutil.h"
32 #define LIBSWSCALE_VERSION_MAJOR 0
33 #define LIBSWSCALE_VERSION_MINOR 6
34 #define LIBSWSCALE_VERSION_MICRO 1
36 #define LIBSWSCALE_VERSION_INT AV_VERSION_INT(LIBSWSCALE_VERSION_MAJOR, \
37 LIBSWSCALE_VERSION_MINOR, \
38 LIBSWSCALE_VERSION_MICRO)
39 #define LIBSWSCALE_VERSION AV_VERSION(LIBSWSCALE_VERSION_MAJOR, \
40 LIBSWSCALE_VERSION_MINOR, \
41 LIBSWSCALE_VERSION_MICRO)
42 #define LIBSWSCALE_BUILD LIBSWSCALE_VERSION_INT
44 #define LIBSWSCALE_IDENT "SwS" AV_STRINGIFY(LIBSWSCALE_VERSION)
47 * Returns the LIBSWSCALE_VERSION_INT constant.
49 unsigned swscale_version(void);
51 /* values for the flags, the stuff on the command line is different */
52 #define SWS_FAST_BILINEAR 1
53 #define SWS_BILINEAR 2
56 #define SWS_POINT 0x10
58 #define SWS_BICUBLIN 0x40
59 #define SWS_GAUSS 0x80
60 #define SWS_SINC 0x100
61 #define SWS_LANCZOS 0x200
62 #define SWS_SPLINE 0x400
64 #define SWS_SRC_V_CHR_DROP_MASK 0x30000
65 #define SWS_SRC_V_CHR_DROP_SHIFT 16
67 #define SWS_PARAM_DEFAULT 123456
69 #define SWS_PRINT_INFO 0x1000
71 //the following 3 flags are not completely implemented
72 //internal chrominace subsampling info
73 #define SWS_FULL_CHR_H_INT 0x2000
74 //input subsampling info
75 #define SWS_FULL_CHR_H_INP 0x4000
76 #define SWS_DIRECT_BGR 0x8000
77 #define SWS_ACCURATE_RND 0x40000
78 #define SWS_BITEXACT 0x80000
80 #define SWS_CPU_CAPS_MMX 0x80000000
81 #define SWS_CPU_CAPS_MMX2 0x20000000
82 #define SWS_CPU_CAPS_3DNOW 0x40000000
83 #define SWS_CPU_CAPS_ALTIVEC 0x10000000
84 #define SWS_CPU_CAPS_BFIN 0x01000000
86 #define SWS_MAX_REDUCE_CUTOFF 0.002
88 #define SWS_CS_ITU709 1
90 #define SWS_CS_ITU601 5
91 #define SWS_CS_ITU624 5
92 #define SWS_CS_SMPTE170M 5
93 #define SWS_CS_SMPTE240M 7
94 #define SWS_CS_DEFAULT 5
98 // when used for filters they must have an odd number of elements
99 // coeffs cannot be shared between vectors
105 // vectors can be shared
115 void sws_freeContext(struct SwsContext
*swsContext
);
117 struct SwsContext
*sws_getContext(int srcW
, int srcH
, int srcFormat
, int dstW
, int dstH
, int dstFormat
, int flags
,
118 SwsFilter
*srcFilter
, SwsFilter
*dstFilter
, double *param
);
119 int sws_scale(struct SwsContext
*context
, uint8_t* src
[], int srcStride
[], int srcSliceY
,
120 int srcSliceH
, uint8_t* dst
[], int dstStride
[]);
121 int sws_scale_ordered(struct SwsContext
*context
, uint8_t* src
[], int srcStride
[], int srcSliceY
,
122 int srcSliceH
, uint8_t* dst
[], int dstStride
[]) attribute_deprecated
;
125 int sws_setColorspaceDetails(struct SwsContext
*c
, const int inv_table
[4], int srcRange
, const int table
[4], int dstRange
, int brightness
, int contrast
, int saturation
);
126 int sws_getColorspaceDetails(struct SwsContext
*c
, int **inv_table
, int *srcRange
, int **table
, int *dstRange
, int *brightness
, int *contrast
, int *saturation
);
127 SwsVector
*sws_getGaussianVec(double variance
, double quality
);
128 SwsVector
*sws_getConstVec(double c
, int length
);
129 SwsVector
*sws_getIdentityVec(void);
130 void sws_scaleVec(SwsVector
*a
, double scalar
);
131 void sws_normalizeVec(SwsVector
*a
, double height
);
132 void sws_convVec(SwsVector
*a
, SwsVector
*b
);
133 void sws_addVec(SwsVector
*a
, SwsVector
*b
);
134 void sws_subVec(SwsVector
*a
, SwsVector
*b
);
135 void sws_shiftVec(SwsVector
*a
, int shift
);
136 SwsVector
*sws_cloneVec(SwsVector
*a
);
138 void sws_printVec(SwsVector
*a
);
139 void sws_freeVec(SwsVector
*a
);
141 SwsFilter
*sws_getDefaultFilter(float lumaGBlur
, float chromaGBlur
,
142 float lumaSarpen
, float chromaSharpen
,
143 float chromaHShift
, float chromaVShift
,
145 void sws_freeFilter(SwsFilter
*filter
);
147 struct SwsContext
*sws_getCachedContext(struct SwsContext
*context
,
148 int srcW
, int srcH
, int srcFormat
,
149 int dstW
, int dstH
, int dstFormat
, int flags
,
150 SwsFilter
*srcFilter
, SwsFilter
*dstFilter
, double *param
);
152 #endif /* SWSCALE_SWSCALE_H */