Change license headers to say 'FFmpeg' instead of 'this program/this library'
[libav.git] / libswscale / swscale.h
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fe8054c0 1/*
5427e242 2 Copyright (C) 2001-2003 Michael Niedermayer <michaelni@gmx.at>
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3
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
8
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
13
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
660204c6 16 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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17
18 the C code (not assembly, mmx, ...) of the swscaler which has been written
19 by Michael Niedermayer can be used under the LGPL license too
fe8054c0 20*/
3db822b0 21
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22#ifndef SWSCALE_H
23#define SWSCALE_H
24
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25/**
26 * @file swscale.h
27 * @brief
28 * external api for the swscale stuff
29 */
30
31#ifdef __cplusplus
32extern "C" {
33#endif
5427e242 34
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35#define AV_STRINGIFY(s) AV_TOSTRING(s)
36#define AV_TOSTRING(s) #s
37
38#define LIBSWSCALE_VERSION_INT ((0<<16)+(5<<8)+0)
39#define LIBSWSCALE_VERSION 0.5.0
40#define LIBSWSCALE_BUILD LIBSWSCALE_VERSION_INT
41
42#define LIBSWSCALE_IDENT "SwS" AV_STRINGIFY(LIBSWSCALE_VERSION)
43
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44/* values for the flags, the stuff on the command line is different */
45#define SWS_FAST_BILINEAR 1
46#define SWS_BILINEAR 2
47#define SWS_BICUBIC 4
48#define SWS_X 8
ff7ba856 49#define SWS_POINT 0x10
d8863d37 50#define SWS_AREA 0x20
81a571a8 51#define SWS_BICUBLIN 0x40
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52#define SWS_GAUSS 0x80
53#define SWS_SINC 0x100
54#define SWS_LANCZOS 0x200
55#define SWS_SPLINE 0x400
1e621b18 56
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57#define SWS_SRC_V_CHR_DROP_MASK 0x30000
58#define SWS_SRC_V_CHR_DROP_SHIFT 16
5859233b 59
66d1cdb6 60#define SWS_PARAM_DEFAULT 123456
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61
62#define SWS_PRINT_INFO 0x1000
63
64//the following 3 flags are not completly implemented
1e621b18 65//internal chrominace subsamling info
985c5133 66#define SWS_FULL_CHR_H_INT 0x2000
1e621b18 67//input subsampling info
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68#define SWS_FULL_CHR_H_INP 0x4000
69#define SWS_DIRECT_BGR 0x8000
bca11e75 70#define SWS_ACCURATE_RND 0x40000
1e621b18 71
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72#define SWS_CPU_CAPS_MMX 0x80000000
73#define SWS_CPU_CAPS_MMX2 0x20000000
74#define SWS_CPU_CAPS_3DNOW 0x40000000
a2faa401 75#define SWS_CPU_CAPS_ALTIVEC 0x10000000
516b1f82 76
c7f822d9 77#define SWS_MAX_REDUCE_CUTOFF 0.002
28bf81c9 78
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79#define SWS_CS_ITU709 1
80#define SWS_CS_FCC 4
81#define SWS_CS_ITU601 5
82#define SWS_CS_ITU624 5
83#define SWS_CS_SMPTE170M 5
84#define SWS_CS_SMPTE240M 7
85#define SWS_CS_DEFAULT 5
86
77a49659 87
28bf81c9 88
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89// when used for filters they must have an odd number of elements
90// coeffs cannot be shared between vectors
28bf81c9 91typedef struct {
c7f822d9 92 double *coeff;
28bf81c9 93 int length;
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94} SwsVector;
95
96// vectors can be shared
97typedef struct {
98 SwsVector *lumH;
99 SwsVector *lumV;
100 SwsVector *chrH;
101 SwsVector *chrV;
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102} SwsFilter;
103
d4e24275 104struct SwsContext;
077ea8a7 105
d4e24275 106void sws_freeContext(struct SwsContext *swsContext);
28bf81c9 107
d4e24275 108struct SwsContext *sws_getContext(int srcW, int srcH, int srcFormat, int dstW, int dstH, int dstFormat, int flags,
66d1cdb6 109 SwsFilter *srcFilter, SwsFilter *dstFilter, double *param);
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110int sws_scale(struct SwsContext *context, uint8_t* src[], int srcStride[], int srcSliceY,
111 int srcSliceH, uint8_t* dst[], int dstStride[]);
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112int sws_scale_ordered(struct SwsContext *context, uint8_t* src[], int srcStride[], int srcSliceY,
113 int srcSliceH, uint8_t* dst[], int dstStride[]);
d4e24275 114
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115
116int sws_setColorspaceDetails(struct SwsContext *c, const int inv_table[4], int srcRange, const int table[4], int dstRange, int brightness, int contrast, int saturation);
117int sws_getColorspaceDetails(struct SwsContext *c, int **inv_table, int *srcRange, int **table, int *dstRange, int *brightness, int *contrast, int *saturation);
118SwsVector *sws_getGaussianVec(double variance, double quality);
119SwsVector *sws_getConstVec(double c, int length);
120SwsVector *sws_getIdentityVec(void);
121void sws_scaleVec(SwsVector *a, double scalar);
122void sws_normalizeVec(SwsVector *a, double height);
123void sws_convVec(SwsVector *a, SwsVector *b);
124void sws_addVec(SwsVector *a, SwsVector *b);
125void sws_subVec(SwsVector *a, SwsVector *b);
126void sws_shiftVec(SwsVector *a, int shift);
127SwsVector *sws_cloneVec(SwsVector *a);
128
129void sws_printVec(SwsVector *a);
130void sws_freeVec(SwsVector *a);
131
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132SwsFilter *sws_getDefaultFilter(float lumaGBlur, float chromaGBlur,
133 float lumaSarpen, float chromaSharpen,
134 float chromaHShift, float chromaVShift,
135 int verbose);
136void sws_freeFilter(SwsFilter *filter);
137
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138struct SwsContext *sws_getCachedContext(struct SwsContext *context,
139 int srcW, int srcH, int srcFormat,
140 int dstW, int dstH, int dstFormat, int flags,
141 SwsFilter *srcFilter, SwsFilter *dstFilter, double *param);
142
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143#ifdef __cplusplus
144}
145#endif
28bf81c9 146
5427e242 147#endif