www.pudn.com > ffmpeg-Sdk.rar > swscale.h

/* 
 * Copyright (C) 2001-2003 Michael Niedermayer  
 * 
 * This file is part of FFmpeg. 
 * 
 * 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. 
 * 
 * FFmpeg is distributed in the hope that it will be useful, 
 * but WITHOUT ANY WARRANTY; without even the implied warranty of 
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU 
 * Lesser General Public License for more details. 
 * 
 * You should have received a copy of the GNU Lesser General Public 
 * License along with FFmpeg; if not, write to the Free Software 
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 
 */ 
 
#ifndef FFMPEG_SWSCALE_H 
#define FFMPEG_SWSCALE_H 
 
/** 
 * @file swscale.h 
 * @brief 
 *     external api for the swscale stuff 
 */ 
 
#include "avutil.h" 
 
#define LIBSWSCALE_VERSION_INT  ((0<<16)+(5<<8)+0) 
#define LIBSWSCALE_VERSION      0.5.0 
#define LIBSWSCALE_BUILD        LIBSWSCALE_VERSION_INT 
 
#define LIBSWSCALE_IDENT        "SwS" AV_STRINGIFY(LIBSWSCALE_VERSION) 
 
/* values for the flags, the stuff on the command line is different */ 
#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 
 
#define SWS_SRC_V_CHR_DROP_MASK     0x30000 
#define SWS_SRC_V_CHR_DROP_SHIFT    16 
 
#define SWS_PARAM_DEFAULT           123456 
 
#define SWS_PRINT_INFO              0x1000 
 
//the following 3 flags are not completely implemented 
//internal chrominace subsampling info 
#define SWS_FULL_CHR_H_INT    0x2000 
//input subsampling info 
#define SWS_FULL_CHR_H_INP    0x4000 
#define SWS_DIRECT_BGR        0x8000 
#define SWS_ACCURATE_RND      0x40000 
 
#define SWS_CPU_CAPS_MMX      0x80000000 
#define SWS_CPU_CAPS_MMX2     0x20000000 
#define SWS_CPU_CAPS_3DNOW    0x40000000 
#define SWS_CPU_CAPS_ALTIVEC  0x10000000 
#define SWS_CPU_CAPS_BFIN     0x01000000 
 
#define SWS_MAX_REDUCE_CUTOFF 0.002 
 
#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 
 
 
 
// when used for filters they must have an odd number of elements 
// coeffs cannot be shared between vectors 
typedef struct { 
    double *coeff; 
    int length; 
} SwsVector; 
 
// vectors can be shared 
typedef struct { 
    SwsVector *lumH; 
    SwsVector *lumV; 
    SwsVector *chrH; 
    SwsVector *chrV; 
} SwsFilter; 
 
struct SwsContext; 
 
void sws_freeContext(struct SwsContext *swsContext); 
 
struct SwsContext *sws_getContext(int srcW, int srcH, int srcFormat, int dstW, int dstH, int dstFormat, int flags, 
                                  SwsFilter *srcFilter, SwsFilter *dstFilter, double *param); 
int sws_scale(struct SwsContext *context, uint8_t* src[], int srcStride[], int srcSliceY, 
              int srcSliceH, uint8_t* dst[], int dstStride[]); 
int sws_scale_ordered(struct SwsContext *context, uint8_t* src[], int srcStride[], int srcSliceY, 
                      int srcSliceH, uint8_t* dst[], int dstStride[]) attribute_deprecated; 
 
 
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); 
 
SwsFilter *sws_getDefaultFilter(float lumaGBlur, float chromaGBlur, 
                                float lumaSarpen, float chromaSharpen, 
                                float chromaHShift, float chromaVShift, 
                                int verbose); 
void sws_freeFilter(SwsFilter *filter); 
 
struct SwsContext *sws_getCachedContext(struct SwsContext *context, 
                                        int srcW, int srcH, int srcFormat, 
                                        int dstW, int dstH, int dstFormat, int flags, 
                                        SwsFilter *srcFilter, SwsFilter *dstFilter, double *param); 
 
#endif /* FFMPEG_SWSCALE_H */