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
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
79 #define SWS_CPU_CAPS_MMX 0x80000000
80 #define SWS_CPU_CAPS_MMX2 0x20000000
81 #define SWS_CPU_CAPS_3DNOW 0x40000000
82 #define SWS_CPU_CAPS_ALTIVEC 0x10000000
83 #define SWS_CPU_CAPS_BFIN 0x01000000
85 #define SWS_MAX_REDUCE_CUTOFF 0.002
87 #define SWS_CS_ITU709 1
89 #define SWS_CS_ITU601 5
90 #define SWS_CS_ITU624 5
91 #define SWS_CS_SMPTE170M 5
92 #define SWS_CS_SMPTE240M 7
93 #define SWS_CS_DEFAULT 5
97 // when used for filters they must have an odd number of elements
98 // coeffs cannot be shared between vectors
104 // vectors can be shared
114 void sws_freeContext(struct SwsContext *swsContext);
116 struct SwsContext *sws_getContext(int srcW, int srcH, int srcFormat, int dstW, int dstH, int dstFormat, int flags,
117 SwsFilter *srcFilter, SwsFilter *dstFilter, double *param);
118 int sws_scale(struct SwsContext *context, uint8_t* src[], int srcStride[], int srcSliceY,
119 int srcSliceH, uint8_t* dst[], int dstStride[]);
120 int sws_scale_ordered(struct SwsContext *context, uint8_t* src[], int srcStride[], int srcSliceY,
121 int srcSliceH, uint8_t* dst[], int dstStride[]) attribute_deprecated;
124 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);
125 int sws_getColorspaceDetails(struct SwsContext *c, int **inv_table, int *srcRange, int **table, int *dstRange, int *brightness, int *contrast, int *saturation);
126 SwsVector *sws_getGaussianVec(double variance, double quality);
127 SwsVector *sws_getConstVec(double c, int length);
128 SwsVector *sws_getIdentityVec(void);
129 void sws_scaleVec(SwsVector *a, double scalar);
130 void sws_normalizeVec(SwsVector *a, double height);
131 void sws_convVec(SwsVector *a, SwsVector *b);
132 void sws_addVec(SwsVector *a, SwsVector *b);
133 void sws_subVec(SwsVector *a, SwsVector *b);
134 void sws_shiftVec(SwsVector *a, int shift);
135 SwsVector *sws_cloneVec(SwsVector *a);
137 void sws_printVec(SwsVector *a);
138 void sws_freeVec(SwsVector *a);
140 SwsFilter *sws_getDefaultFilter(float lumaGBlur, float chromaGBlur,
141 float lumaSarpen, float chromaSharpen,
142 float chromaHShift, float chromaVShift,
144 void sws_freeFilter(SwsFilter *filter);
146 struct SwsContext *sws_getCachedContext(struct SwsContext *context,
147 int srcW, int srcH, int srcFormat,
148 int dstW, int dstH, int dstFormat, int flags,
149 SwsFilter *srcFilter, SwsFilter *dstFilter, double *param);
151 #endif /* SWSCALE_SWSCALE_H */