swscale.h 5.43 KB
Newer Older
1
/*
2 3 4 5
 * Copyright (C) 2001-2003 Michael Niedermayer <michaelni@gmx.at>
 *
 * This file is part of FFmpeg.
 *
6 7 8 9
 * FFmpeg is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
10 11 12
 *
 * FFmpeg is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 14
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
15
 *
16 17
 * You should have received a copy of the GNU Lesser General Public
 * License along with FFmpeg; if not, write to the Free Software
18
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19
 */
Arpi's avatar
Arpi committed
20

21 22
#ifndef FFMPEG_SWSCALE_H
#define FFMPEG_SWSCALE_H
23

24 25
/**
 * @file swscale.h
26
 * @brief
27 28 29
 *     external api for the swscale stuff
 */

30
#include "libavutil/avutil.h"
31

32
#define LIBSWSCALE_VERSION_MAJOR 0
33
#define LIBSWSCALE_VERSION_MINOR 6
34
#define LIBSWSCALE_VERSION_MICRO 1
35

36 37 38 39 40 41
#define LIBSWSCALE_VERSION_INT  AV_VERSION_INT(LIBSWSCALE_VERSION_MAJOR, \
                                               LIBSWSCALE_VERSION_MINOR, \
                                               LIBSWSCALE_VERSION_MICRO)
#define LIBSWSCALE_VERSION      AV_VERSION(LIBSWSCALE_VERSION_MAJOR, \
                                           LIBSWSCALE_VERSION_MINOR, \
                                           LIBSWSCALE_VERSION_MICRO)
42 43 44 45
#define LIBSWSCALE_BUILD        LIBSWSCALE_VERSION_INT

#define LIBSWSCALE_IDENT        "SwS" AV_STRINGIFY(LIBSWSCALE_VERSION)

46 47 48 49 50
/**
 * Returns the LIBSWSCALE_VERSION_INT constant.
 */
unsigned swscale_version(void);

51
/* values for the flags, the stuff on the command line is different */
52 53 54 55 56 57 58 59 60 61 62
#define SWS_FAST_BILINEAR     1
#define SWS_BILINEAR          2
#define SWS_BICUBIC           4
#define SWS_X                 8
#define SWS_POINT          0x10
#define SWS_AREA           0x20
#define SWS_BICUBLIN       0x40
#define SWS_GAUSS          0x80
#define SWS_SINC          0x100
#define SWS_LANCZOS       0x200
#define SWS_SPLINE        0x400
63

64 65
#define SWS_SRC_V_CHR_DROP_MASK     0x30000
#define SWS_SRC_V_CHR_DROP_SHIFT    16
66

67
#define SWS_PARAM_DEFAULT           123456
Michael Niedermayer's avatar
Michael Niedermayer committed
68

69
#define SWS_PRINT_INFO              0x1000
Michael Niedermayer's avatar
Michael Niedermayer committed
70

Diego Biurrun's avatar
Diego Biurrun committed
71 72
//the following 3 flags are not completely implemented
//internal chrominace subsampling info
73
#define SWS_FULL_CHR_H_INT    0x2000
74
//input subsampling info
75 76 77
#define SWS_FULL_CHR_H_INP    0x4000
#define SWS_DIRECT_BGR        0x8000
#define SWS_ACCURATE_RND      0x40000
78

79 80 81 82
#define SWS_CPU_CAPS_MMX      0x80000000
#define SWS_CPU_CAPS_MMX2     0x20000000
#define SWS_CPU_CAPS_3DNOW    0x40000000
#define SWS_CPU_CAPS_ALTIVEC  0x10000000
83
#define SWS_CPU_CAPS_BFIN     0x01000000
84

85
#define SWS_MAX_REDUCE_CUTOFF 0.002
86

87 88 89 90 91 92 93
#define SWS_CS_ITU709         1
#define SWS_CS_FCC            4
#define SWS_CS_ITU601         5
#define SWS_CS_ITU624         5
#define SWS_CS_SMPTE170M      5
#define SWS_CS_SMPTE240M      7
#define SWS_CS_DEFAULT        5
94

Michael Niedermayer's avatar
Michael Niedermayer committed
95

96

97 98
// when used for filters they must have an odd number of elements
// coeffs cannot be shared between vectors
99
typedef struct {
100 101
    double *coeff;
    int length;
102 103 104 105
} SwsVector;

// vectors can be shared
typedef struct {
106 107 108 109
    SwsVector *lumH;
    SwsVector *lumV;
    SwsVector *chrH;
    SwsVector *chrV;
110 111
} SwsFilter;

112
struct SwsContext;
113

114
void sws_freeContext(struct SwsContext *swsContext);
115

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;
122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139


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);
int sws_getColorspaceDetails(struct SwsContext *c, int **inv_table, int *srcRange, int **table, int *dstRange, int *brightness, int *contrast, int *saturation);
SwsVector *sws_getGaussianVec(double variance, double quality);
SwsVector *sws_getConstVec(double c, int length);
SwsVector *sws_getIdentityVec(void);
void sws_scaleVec(SwsVector *a, double scalar);
void sws_normalizeVec(SwsVector *a, double height);
void sws_convVec(SwsVector *a, SwsVector *b);
void sws_addVec(SwsVector *a, SwsVector *b);
void sws_subVec(SwsVector *a, SwsVector *b);
void sws_shiftVec(SwsVector *a, int shift);
SwsVector *sws_cloneVec(SwsVector *a);

void sws_printVec(SwsVector *a);
void sws_freeVec(SwsVector *a);

140
SwsFilter *sws_getDefaultFilter(float lumaGBlur, float chromaGBlur,
141 142 143
                                float lumaSarpen, float chromaSharpen,
                                float chromaHShift, float chromaVShift,
                                int verbose);
144 145
void sws_freeFilter(SwsFilter *filter);

146
struct SwsContext *sws_getCachedContext(struct SwsContext *context,
147 148 149
                                        int srcW, int srcH, int srcFormat,
                                        int dstW, int dstH, int dstFormat, int flags,
                                        SwsFilter *srcFilter, SwsFilter *dstFilter, double *param);
150

151
#endif /* FFMPEG_SWSCALE_H */