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/*
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 * Copyright (C) 2001-2002 Michael Niedermayer (michaelni@gmx.at)
 *
 * This file is part of FFmpeg.
 *
 * FFmpeg 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.
 *
 * 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 General Public License for more details.
 *
 * You should have received a copy of the GNU 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
 */
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/**
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 * @file
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 * internal api header.
 */

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#ifndef POSTPROC_POSTPROCESS_INTERNAL_H
#define POSTPROC_POSTPROCESS_INTERNAL_H
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#include <string.h>
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#include "libavutil/avutil.h"
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#include "postprocess.h"
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#define V_DEBLOCK       0x01
#define H_DEBLOCK       0x02
#define DERING          0x04
#define LEVEL_FIX       0x08 ///< Brightness & Contrast

#define LUM_V_DEBLOCK   V_DEBLOCK               //   1
#define LUM_H_DEBLOCK   H_DEBLOCK               //   2
#define CHROM_V_DEBLOCK (V_DEBLOCK<<4)          //  16
#define CHROM_H_DEBLOCK (H_DEBLOCK<<4)          //  32
#define LUM_DERING      DERING                  //   4
#define CHROM_DERING    (DERING<<4)             //  64
#define LUM_LEVEL_FIX   LEVEL_FIX               //   8
#define CHROM_LEVEL_FIX (LEVEL_FIX<<4)          // 128 (not implemented yet)
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// Experimental vertical filters
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#define V_X1_FILTER     0x0200                  // 512
#define V_A_DEBLOCK     0x0400
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// Experimental horizontal filters
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#define H_X1_FILTER     0x2000                  // 8192
#define H_A_DEBLOCK     0x4000
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/// select between full y range (255-0) or standart one (234-16)
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#define FULL_Y_RANGE    0x8000                  // 32768
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//Deinterlacing Filters
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#define LINEAR_IPOL_DEINT_FILTER        0x10000 // 65536
#define LINEAR_BLEND_DEINT_FILTER       0x20000 // 131072
#define CUBIC_BLEND_DEINT_FILTER        0x8000  // (not implemented yet)
#define CUBIC_IPOL_DEINT_FILTER         0x40000 // 262144
#define MEDIAN_DEINT_FILTER             0x80000 // 524288
#define FFMPEG_DEINT_FILTER             0x400000
#define LOWPASS5_DEINT_FILTER           0x800000
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#define TEMP_NOISE_FILTER               0x100000
#define FORCE_QUANT                     0x200000
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//use if you want a faster postprocessing code
//cannot differentiate between chroma & luma filters (both on or both off)
//obviously the -pp option on the command line has no effect except turning the here selected
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//filters on
//#define COMPILE_TIME_MODE 0x77

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static inline int CLIP(int a){
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    if(a&256) return ((a)>>31)^(-1);
    else      return a;
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}
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/**
 * Postprocessng filter.
 */
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struct PPFilter{
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    const char *shortName;
    const char *longName;
    int chromDefault;       ///< is chrominance filtering on by default if this filter is manually activated
    int minLumQuality;      ///< minimum quality to turn luminance filtering on
    int minChromQuality;    ///< minimum quality to turn chrominance filtering on
    int mask;               ///< Bitmask to turn this filter on
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};

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/**
 * Postprocessng mode.
 */
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typedef struct PPMode{
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    int lumMode;                    ///< acivates filters for luminance
    int chromMode;                  ///< acivates filters for chrominance
    int error;                      ///< non zero on error
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    int minAllowedY;                ///< for brigtness correction
    int maxAllowedY;                ///< for brihtness correction
    float maxClippedThreshold;      ///< amount of "black" u r willing to loose to get a brightness corrected picture
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    int maxTmpNoise[3];             ///< for Temporal Noise Reducing filter (Maximal sum of abs differences)
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    int baseDcDiff;
    int flatnessThreshold;
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    int forcedQuant;                ///< quantizer if FORCE_QUANT is used
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} PPMode;

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/**
 * postprocess context.
 */
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typedef struct PPContext{
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    /**
     * info on struct for av_log
     */
    const AVClass *av_class;
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    uint8_t *tempBlocks; ///<used for the horizontal code
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    /**
     * luma histogram.
     * we need 64bit here otherwise we'll going to have a problem
     * after watching a black picture for 5 hours
     */
    uint64_t *yHistogram;
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    DECLARE_ALIGNED(8, uint64_t, packedYOffset);
    DECLARE_ALIGNED(8, uint64_t, packedYScale);
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    /** Temporal noise reducing buffers */
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    uint8_t *tempBlurred[3];
    int32_t *tempBlurredPast[3];
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    /** Temporary buffers for handling the last row(s) */
    uint8_t *tempDst;
    uint8_t *tempSrc;
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    uint8_t *deintTemp;
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    DECLARE_ALIGNED(8, uint64_t, pQPb);
    DECLARE_ALIGNED(8, uint64_t, pQPb2);
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    DECLARE_ALIGNED(8, uint64_t, mmxDcOffset)[64];
    DECLARE_ALIGNED(8, uint64_t, mmxDcThreshold)[64];
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    QP_STORE_T *stdQPTable;       ///< used to fix MPEG2 style qscale
    QP_STORE_T *nonBQPTable;
    QP_STORE_T *forcedQPTable;
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    int QP;
    int nonBQP;
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    int frameNum;
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    int cpuCaps;
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    int qpStride; ///<size of qp buffers (needed to realloc them if needed)
    int stride;   ///<size of some buffers (needed to realloc them if needed)
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    int hChromaSubSample;
    int vChromaSubSample;
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    PPMode ppMode;
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} PPContext;

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static inline void linecpy(void *dest, const void *src, int lines, int stride) {
    if (stride > 0) {
        memcpy(dest, src, lines*stride);
    } else {
        memcpy((uint8_t*)dest+(lines-1)*stride, (const uint8_t*)src+(lines-1)*stride, -lines*stride);
    }
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}
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#endif /* POSTPROC_POSTPROCESS_INTERNAL_H */