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/*
Copyright (C) 2001-2002 Michael Niedermayer <michaelni@gmx.at>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/* 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_MASK 0x3FC0000
#define SWS_PARAM_SHIFT 18
#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_MAX_REDUCE_CUTOFF 0.002
/* this struct should be aligned on at least 32-byte boundary */
typedef struct SwsContext{
int srcW, srcH, dstW, dstH;
int chrSrcW, chrSrcH, chrDstW, chrDstH;
int lumXInc, chrXInc;
int lumYInc, chrYInc;
int dstFormat, srcFormat;
int chrSrcHSubSample, chrSrcVSubSample;
int chrIntHSubSample, chrIntVSubSample;
int chrDstHSubSample, chrDstVSubSample;
int vChrDrop;
int16_t **lumPixBuf;
int16_t **chrPixBuf;
int16_t *hLumFilter;
int16_t *hLumFilterPos;
int16_t *hChrFilter;
int16_t *hChrFilterPos;
int16_t *vLumFilter;
int16_t *vLumFilterPos;
int16_t *vChrFilter;
int16_t *vChrFilterPos;
// Contain simply the values from v(Lum|Chr)Filter just nicely packed for mmx
int16_t *lumMmxFilter;
int16_t *chrMmxFilter;
uint8_t formatConvBuffer[4000]; //FIXME dynamic alloc, but we have to change alot of code for this to be usefull
int hLumFilterSize;
int hChrFilterSize;
int vLumFilterSize;
int vChrFilterSize;
int vLumBufSize;
int vChrBufSize;
uint8_t __attribute__((aligned(32))) funnyYCode[10000];
uint8_t __attribute__((aligned(32))) funnyUVCode[10000];
int32_t *lumMmx2FilterPos;
int32_t *chrMmx2FilterPos;
int16_t *lumMmx2Filter;
int16_t *chrMmx2Filter;
int canMMX2BeUsed;
int lastInLumBuf;
int lastInChrBuf;
int lumBufIndex;
int chrBufIndex;
int dstY;
int flags;
void * yuvTable;
void * table_rV[256];
void * table_gU[256];
int table_gV[256];
void * table_bU[256];
void (*swScale)(struct SwsContext *context, uint8_t* src[], int srcStride[], int srcSliceY,
int srcSliceH, uint8_t* dst[], int dstStride[]);
} SwsContext;
//FIXME check init (where 0)
// 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;
// *** bilinear scaling and yuv->rgb & yuv->yuv conversion of yv12 slices:
// *** Note: it's called multiple times while decoding a frame, first time y==0
// dstbpp == 12 -> yv12 output
// will use sws_flags
void SwScale_YV12slice(unsigned char* src[],int srcStride[], int srcSliceY,
int srcSliceH, uint8_t* dst[], int dstStride, int dstbpp,
int srcW, int srcH, int dstW, int dstH);
// Obsolete, will be removed soon
void SwScale_Init();
void freeSwsContext(SwsContext *swsContext);
SwsContext *getSwsContextFromCmdLine(int srcW, int srcH, int srcFormat, int dstW, int dstH, int dstFormat);
SwsContext *getSwsContext(int srcW, int srcH, int srcFormat, int dstW, int dstH, int dstFormat, int flags,
SwsFilter *srcFilter, SwsFilter *dstFilter);
void swsGetFlagsAndFilterFromCmdLine(int *flags, SwsFilter **srcFilterParam, SwsFilter **dstFilterParam);
SwsVector *getGaussianVec(double variance, double quality);
SwsVector *getConstVec(double c, int length);
SwsVector *getIdentityVec(void);
void scaleVec(SwsVector *a, double scalar);
void normalizeVec(SwsVector *a, double height);
void convVec(SwsVector *a, SwsVector *b);
void addVec(SwsVector *a, SwsVector *b);
void subVec(SwsVector *a, SwsVector *b);
void shiftVec(SwsVector *a, int shift);
SwsVector *cloneVec(SwsVector *a);
void printVec(SwsVector *a);
void freeVec(SwsVector *a);
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