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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_SWSCALE_INTERNAL_H
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#define SWSCALE_SWSCALE_INTERNAL_H
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#include "config.h"
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#if HAVE_ALTIVEC_H
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#include <altivec.h>
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#endif
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#include "libavutil/avutil.h"
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#define STR(s)         AV_TOSTRING(s) //AV_STRINGIFY is too long
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#define MAX_FILTER_SIZE 256
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#define VOFW 2048
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#define VOF  (VOFW*2)
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#ifdef WORDS_BIGENDIAN
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#define ALT32_CORR (-1)
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#else
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#define ALT32_CORR   1
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#endif
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#if ARCH_X86_64
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#   define APCK_PTR2 8
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#   define APCK_COEF 16
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#   define APCK_SIZE 24
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#else
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#   define APCK_PTR2 4
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#   define APCK_COEF 8
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#   define APCK_SIZE 16
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#endif
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struct SwsContext;
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typedef int (*SwsFunc)(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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/* This struct should be aligned on at least a 32-byte boundary. */
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typedef struct SwsContext{
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    /**
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     * info on struct for av_log
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     */
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    const AVClass *av_class;
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    /**
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     * Note that src, dst, srcStride, dstStride will be copied in the
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     * sws_scale() wrapper so they can be freely modified here.
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     */
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    SwsFunc swScale;
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    int srcW, srcH, dstH;
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    int chrSrcW, chrSrcH, chrDstW, chrDstH;
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    int lumXInc, chrXInc;
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    int lumYInc, chrYInc;
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    enum PixelFormat dstFormat, srcFormat;  ///< format 4:2:0 type is always YV12
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    int origDstFormat, origSrcFormat;       ///< format
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    int chrSrcHSubSample, chrSrcVSubSample;
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    int chrIntHSubSample, chrIntVSubSample;
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    int chrDstHSubSample, chrDstVSubSample;
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    int vChrDrop;
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    int sliceDir;
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    double param[2];
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    uint32_t pal_yuv[256];
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    uint32_t pal_rgb[256];
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    int16_t **lumPixBuf;
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    int16_t **chrPixBuf;
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    int16_t **alpPixBuf;
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    int16_t *hLumFilter;
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    int16_t *hLumFilterPos;
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    int16_t *hChrFilter;
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    int16_t *hChrFilterPos;
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    int16_t *vLumFilter;
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    int16_t *vLumFilterPos;
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    int16_t *vChrFilter;
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    int16_t *vChrFilterPos;
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    uint8_t formatConvBuffer[VOF]; //FIXME dynamic allocation, but we have to change a lot of code for this to be useful
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    int hLumFilterSize;
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    int hChrFilterSize;
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    int vLumFilterSize;
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    int vChrFilterSize;
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    int vLumBufSize;
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    int vChrBufSize;
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    uint8_t *funnyYCode;
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    uint8_t *funnyUVCode;
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    int32_t *lumMmx2FilterPos;
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    int32_t *chrMmx2FilterPos;
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    int16_t *lumMmx2Filter;
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    int16_t *chrMmx2Filter;
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    int canMMX2BeUsed;
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    int lastInLumBuf;
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    int lastInChrBuf;
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    int lumBufIndex;
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    int chrBufIndex;
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    int dstY;
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    int flags;
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    void * yuvTable;            // pointer to the yuv->rgb table start so it can be freed()
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    uint8_t * table_rV[256];
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    uint8_t * table_gU[256];
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    int    table_gV[256];
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    uint8_t * table_bU[256];
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    //Colorspace stuff
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    int contrast, brightness, saturation;    // for sws_getColorspaceDetails
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    int srcColorspaceTable[4];
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    int dstColorspaceTable[4];
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    int srcRange, dstRange;
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    int yuv2rgb_y_offset;
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    int yuv2rgb_y_coeff;
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    int yuv2rgb_v2r_coeff;
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    int yuv2rgb_v2g_coeff;
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    int yuv2rgb_u2g_coeff;
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    int yuv2rgb_u2b_coeff;
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#define RED_DITHER            "0*8"
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#define GREEN_DITHER          "1*8"
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#define BLUE_DITHER           "2*8"
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#define Y_COEFF               "3*8"
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#define VR_COEFF              "4*8"
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#define UB_COEFF              "5*8"
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#define VG_COEFF              "6*8"
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#define UG_COEFF              "7*8"
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#define Y_OFFSET              "8*8"
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#define U_OFFSET              "9*8"
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#define V_OFFSET              "10*8"
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#define LUM_MMX_FILTER_OFFSET "11*8"
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#define CHR_MMX_FILTER_OFFSET "11*8+4*4*256"
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#define DSTW_OFFSET           "11*8+4*4*256*2" //do not change, it is hardcoded in the ASM
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#define ESP_OFFSET            "11*8+4*4*256*2+8"
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#define VROUNDER_OFFSET       "11*8+4*4*256*2+16"
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#define U_TEMP                "11*8+4*4*256*2+24"
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#define V_TEMP                "11*8+4*4*256*2+32"
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#define Y_TEMP                "11*8+4*4*256*2+40"
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#define ALP_MMX_FILTER_OFFSET "11*8+4*4*256*2+48"
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    uint64_t redDither   __attribute__((aligned(8)));
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    uint64_t greenDither __attribute__((aligned(8)));
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    uint64_t blueDither  __attribute__((aligned(8)));
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    uint64_t yCoeff      __attribute__((aligned(8)));
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    uint64_t vrCoeff     __attribute__((aligned(8)));
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    uint64_t ubCoeff     __attribute__((aligned(8)));
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    uint64_t vgCoeff     __attribute__((aligned(8)));
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    uint64_t ugCoeff     __attribute__((aligned(8)));
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    uint64_t yOffset     __attribute__((aligned(8)));
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    uint64_t uOffset     __attribute__((aligned(8)));
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    uint64_t vOffset     __attribute__((aligned(8)));
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    int32_t  lumMmxFilter[4*MAX_FILTER_SIZE];
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    int32_t  chrMmxFilter[4*MAX_FILTER_SIZE];
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    int dstW;
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    uint64_t esp          __attribute__((aligned(8)));
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    uint64_t vRounder     __attribute__((aligned(8)));
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    uint64_t u_temp       __attribute__((aligned(8)));
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    uint64_t v_temp       __attribute__((aligned(8)));
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    uint64_t y_temp       __attribute__((aligned(8)));
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    int32_t  alpMmxFilter[4*MAX_FILTER_SIZE];
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#if HAVE_ALTIVEC
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  vector signed short   CY;
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  vector signed short   CRV;
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  vector signed short   CBU;
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  vector signed short   CGU;
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  vector signed short   CGV;
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  vector signed short   OY;
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  vector unsigned short CSHIFT;
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  vector signed short   *vYCoeffsBank, *vCCoeffsBank;
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#endif
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#if ARCH_BFIN
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    uint32_t oy           __attribute__((aligned(4)));
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    uint32_t oc           __attribute__((aligned(4)));
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    uint32_t zero         __attribute__((aligned(4)));
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    uint32_t cy           __attribute__((aligned(4)));
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    uint32_t crv          __attribute__((aligned(4)));
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    uint32_t rmask        __attribute__((aligned(4)));
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    uint32_t cbu          __attribute__((aligned(4)));
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    uint32_t bmask        __attribute__((aligned(4)));
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    uint32_t cgu          __attribute__((aligned(4)));
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    uint32_t cgv          __attribute__((aligned(4)));
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    uint32_t gmask        __attribute__((aligned(4)));
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#endif
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#if HAVE_VIS
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    uint64_t sparc_coeffs[10] __attribute__((aligned(8)));
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#endif
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} SwsContext;
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//FIXME check init (where 0)
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SwsFunc ff_yuv2rgb_get_func_ptr(SwsContext *c);
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int ff_yuv2rgb_c_init_tables(SwsContext *c, const int inv_table[4], int fullRange, int brightness, int contrast, int saturation);
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void ff_yuv2rgb_init_tables_altivec(SwsContext *c, const int inv_table[4], int brightness, int contrast, int saturation);
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SwsFunc ff_yuv2rgb_init_altivec(SwsContext *c);
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void ff_yuv2packedX_altivec(SwsContext *c,
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                          int16_t *lumFilter, int16_t **lumSrc, int lumFilterSize,
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                          int16_t *chrFilter, int16_t **chrSrc, int chrFilterSize,
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                          uint8_t *dest, int dstW, int dstY);
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const char *sws_format_name(int format);
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//FIXME replace this with something faster
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#define isPlanarYUV(x)  (           \
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           (x)==PIX_FMT_YUV410P     \
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        || (x)==PIX_FMT_YUV420P     \
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        || (x)==PIX_FMT_YUVA420P    \
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        || (x)==PIX_FMT_YUV411P     \
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        || (x)==PIX_FMT_YUV422P     \
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        || (x)==PIX_FMT_YUV444P     \
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        || (x)==PIX_FMT_YUV440P     \
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        || (x)==PIX_FMT_NV12        \
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        || (x)==PIX_FMT_NV21        \
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    )
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#define isYUV(x)        (           \
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           (x)==PIX_FMT_UYVY422     \
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        || (x)==PIX_FMT_YUYV422     \
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        || isPlanarYUV(x)           \
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    )
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#define isGray(x)       (           \
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           (x)==PIX_FMT_GRAY8       \
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        || (x)==PIX_FMT_GRAY16BE    \
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        || (x)==PIX_FMT_GRAY16LE    \
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    )
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#define isGray16(x)     (           \
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           (x)==PIX_FMT_GRAY16BE    \
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        || (x)==PIX_FMT_GRAY16LE    \
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    )
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#define isRGB(x)        (           \
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           (x)==PIX_FMT_RGB32       \
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        || (x)==PIX_FMT_RGB32_1     \
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        || (x)==PIX_FMT_RGB24       \
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        || (x)==PIX_FMT_RGB565      \
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        || (x)==PIX_FMT_RGB555      \
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        || (x)==PIX_FMT_RGB8        \
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        || (x)==PIX_FMT_RGB4        \
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        || (x)==PIX_FMT_RGB4_BYTE   \
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        || (x)==PIX_FMT_MONOBLACK   \
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        || (x)==PIX_FMT_MONOWHITE   \
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    )
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#define isBGR(x)        (           \
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           (x)==PIX_FMT_BGR32       \
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        || (x)==PIX_FMT_BGR32_1     \
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        || (x)==PIX_FMT_BGR24       \
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        || (x)==PIX_FMT_BGR565      \
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        || (x)==PIX_FMT_BGR555      \
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        || (x)==PIX_FMT_BGR8        \
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        || (x)==PIX_FMT_BGR4        \
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        || (x)==PIX_FMT_BGR4_BYTE   \
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        || (x)==PIX_FMT_MONOBLACK   \
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        || (x)==PIX_FMT_MONOWHITE   \
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    )
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#define isALPHA(x)      (           \
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           (x)==PIX_FMT_BGR32       \
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        || (x)==PIX_FMT_BGR32_1     \
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        || (x)==PIX_FMT_RGB32       \
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        || (x)==PIX_FMT_RGB32_1     \
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        || (x)==PIX_FMT_YUVA420P    \
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    )
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static inline int fmt_depth(int fmt)
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{
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    switch(fmt) {
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        case PIX_FMT_BGRA:
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        case PIX_FMT_ABGR:
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        case PIX_FMT_RGBA:
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        case PIX_FMT_ARGB:
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            return 32;
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        case PIX_FMT_BGR24:
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        case PIX_FMT_RGB24:
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            return 24;
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        case PIX_FMT_BGR565:
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        case PIX_FMT_RGB565:
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        case PIX_FMT_GRAY16BE:
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        case PIX_FMT_GRAY16LE:
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            return 16;
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        case PIX_FMT_BGR555:
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        case PIX_FMT_RGB555:
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            return 15;
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        case PIX_FMT_BGR8:
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        case PIX_FMT_RGB8:
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            return 8;
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        case PIX_FMT_BGR4:
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        case PIX_FMT_RGB4:
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        case PIX_FMT_BGR4_BYTE:
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        case PIX_FMT_RGB4_BYTE:
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            return 4;
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        case PIX_FMT_MONOBLACK:
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        case PIX_FMT_MONOWHITE:
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            return 1;
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        default:
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            return 0;
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    }
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}
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extern const uint64_t ff_dither4[2];
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extern const uint64_t ff_dither8[2];
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extern const AVClass sws_context_class;
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#endif /* SWSCALE_SWSCALE_INTERNAL_H */