www.pudn.com > ffmpeg_c.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 St, Fifth Floor, Boston, MA 02110-1301 USA 
 */ 
 
#ifndef SWSCALE_H 
#define SWSCALE_H 
 
/** 
 * @file swscale.h 
 * @brief  
 *     external api for the swscale stuff 
 */ 
 
#include "avutil.h" 
 
#ifdef __cplusplus 
extern "C" { 
#endif 
 
#define AV_STRINGIFY(s)         AV_TOSTRING(s) 
#define AV_TOSTRING(s) #s 
 
#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 completly implemented 
//internal chrominace subsamling 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_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); 
 
#ifdef __cplusplus 
} 
#endif 
 
#endif