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/*
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 * Copyright (C) 2001-2003 Michael Niedermayer <michaelni@gmx.at>
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 *
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 * This file is part of FFmpeg.
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 *
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 * FFmpeg is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
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 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * FFmpeg is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with FFmpeg; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
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#ifndef SWSCALE_H
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#define SWSCALE_H
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/**
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 * @file swscale.h
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 * @brief
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 *     external api for the swscale stuff
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 */
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#include "avutil.h"
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#define AV_STRINGIFY(s)         AV_TOSTRING(s)
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#define AV_TOSTRING(s) #s
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#define LIBSWSCALE_VERSION_INT  ((0<<16)+(5<<8)+0)
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#define LIBSWSCALE_VERSION      0.5.0
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#define LIBSWSCALE_BUILD        LIBSWSCALE_VERSION_INT
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#define LIBSWSCALE_IDENT        "SwS" AV_STRINGIFY(LIBSWSCALE_VERSION)
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/* values for the flags, the stuff on the command line is different */
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#define SWS_FAST_BILINEAR     1
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#define SWS_BILINEAR          2
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#define SWS_BICUBIC           4
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#define SWS_X                 8
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#define SWS_POINT          0x10
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#define SWS_AREA           0x20
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#define SWS_BICUBLIN       0x40
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#define SWS_GAUSS          0x80
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#define SWS_SINC          0x100
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#define SWS_LANCZOS       0x200
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#define SWS_SPLINE        0x400
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#define SWS_SRC_V_CHR_DROP_MASK     0x30000
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#define SWS_SRC_V_CHR_DROP_SHIFT    16
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#define SWS_PARAM_DEFAULT           123456
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#define SWS_PRINT_INFO              0x1000
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//the following 3 flags are not completely implemented
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//internal chrominace subsampling info
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#define SWS_FULL_CHR_H_INT    0x2000
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//input subsampling info
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#define SWS_FULL_CHR_H_INP    0x4000
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#define SWS_DIRECT_BGR        0x8000
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#define SWS_ACCURATE_RND      0x40000
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#define SWS_CPU_CAPS_MMX      0x80000000
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#define SWS_CPU_CAPS_MMX2     0x20000000
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#define SWS_CPU_CAPS_3DNOW    0x40000000
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#define SWS_CPU_CAPS_ALTIVEC  0x10000000
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#define SWS_CPU_CAPS_BFIN     0x01000000
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#define SWS_MAX_REDUCE_CUTOFF 0.002
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#define SWS_CS_ITU709         1
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#define SWS_CS_FCC            4
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#define SWS_CS_ITU601         5
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#define SWS_CS_ITU624         5
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#define SWS_CS_SMPTE170M      5
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#define SWS_CS_SMPTE240M      7
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#define SWS_CS_DEFAULT        5
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// when used for filters they must have an odd number of elements
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// coeffs cannot be shared between vectors
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typedef struct {
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    double *coeff;
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    int length;
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} SwsVector;
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// vectors can be shared
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typedef struct {
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    SwsVector *lumH;
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    SwsVector *lumV;
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    SwsVector *chrH;
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    SwsVector *chrV;
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} SwsFilter;
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struct SwsContext;
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void sws_freeContext(struct SwsContext *swsContext);
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struct SwsContext *sws_getContext(int srcW, int srcH, int srcFormat, int dstW, int dstH, int dstFormat, int flags,
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                                  SwsFilter *srcFilter, SwsFilter *dstFilter, double *param);
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int sws_scale(struct SwsContext *context, uint8_t* src[], int srcStride[], int srcSliceY,
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              int srcSliceH, uint8_t* dst[], int dstStride[]);
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int sws_scale_ordered(struct SwsContext *context, uint8_t* src[], int srcStride[], int srcSliceY,
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                      int srcSliceH, uint8_t* dst[], int dstStride[]) attribute_deprecated;
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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);
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int sws_getColorspaceDetails(struct SwsContext *c, int **inv_table, int *srcRange, int **table, int *dstRange, int *brightness, int *contrast, int *saturation);
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SwsVector *sws_getGaussianVec(double variance, double quality);
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SwsVector *sws_getConstVec(double c, int length);
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SwsVector *sws_getIdentityVec(void);
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void sws_scaleVec(SwsVector *a, double scalar);
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void sws_normalizeVec(SwsVector *a, double height);
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void sws_convVec(SwsVector *a, SwsVector *b);
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void sws_addVec(SwsVector *a, SwsVector *b);
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void sws_subVec(SwsVector *a, SwsVector *b);
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void sws_shiftVec(SwsVector *a, int shift);
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SwsVector *sws_cloneVec(SwsVector *a);
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void sws_printVec(SwsVector *a);
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void sws_freeVec(SwsVector *a);
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SwsFilter *sws_getDefaultFilter(float lumaGBlur, float chromaGBlur,
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                                float lumaSarpen, float chromaSharpen,
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                                float chromaHShift, float chromaVShift,
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                                int verbose);
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void sws_freeFilter(SwsFilter *filter);
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struct SwsContext *sws_getCachedContext(struct SwsContext *context,
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                                        int srcW, int srcH, int srcFormat,
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                                        int dstW, int dstH, int dstFormat, int flags,
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                                        SwsFilter *srcFilter, SwsFilter *dstFilter, double *param);
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#endif