/*

  * 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
  */

 /**

  * @file

  * internal api header.
  */
 

 #ifndef POSTPROC_POSTPROCESS_INTERNAL_H
 #define POSTPROC_POSTPROCESS_INTERNAL_H

 #include <string.h>

 #include "libavutil/avutil.h"

 #include "libavutil/log.h"

 #include "postprocess.h"

 #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)

 
 // Experimental vertical filters

 #define V_X1_FILTER     0x0200                  // 512
 #define V_A_DEBLOCK     0x0400

 
 // Experimental horizontal filters

 #define H_X1_FILTER     0x2000                  // 8192
 #define H_A_DEBLOCK     0x4000

 /// select between full y range (255-0) or standart one (234-16)

 #define FULL_Y_RANGE    0x8000                  // 32768

 
 //Deinterlacing Filters

 #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

 #define TEMP_NOISE_FILTER               0x100000
 #define FORCE_QUANT                     0x200000

 #define BITEXACT                        0x1000000

 //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

 //filters on
 //#define COMPILE_TIME_MODE 0x77
 

 static inline int CLIP(int a){

     if(a&256) return ((a)>>31)^(-1);
     else      return a;

 }

 /**
  * Postprocessng filter.
  */

 struct PPFilter{

     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

 };
 

 /**
  * Postprocessng mode.
  */

 typedef struct PPMode{

     int lumMode;                    ///< acivates filters for luminance
     int chromMode;                  ///< acivates filters for chrominance
     int error;                      ///< non zero on error

     int minAllowedY;                ///< for brigtness correction
     int maxAllowedY;                ///< for brihtness correction

     float maxClippedThreshold;      ///< amount of "black" you are willing to lose to get a brightness-corrected picture

     int maxTmpNoise[3];             ///< for Temporal Noise Reducing filter (Maximal sum of abs differences)

     int baseDcDiff;
     int flatnessThreshold;

     int forcedQuant;                ///< quantizer if FORCE_QUANT is used

 } PPMode;
 

 /**
  * postprocess context.
  */

 typedef struct PPContext{

     /**
      * info on struct for av_log
      */
     const AVClass *av_class;

     uint8_t *tempBlocks; ///<used for the horizontal code

     /**
      * 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;

     DECLARE_ALIGNED(8, uint64_t, packedYOffset);
     DECLARE_ALIGNED(8, uint64_t, packedYScale);

     /** Temporal noise reducing buffers */

     uint8_t *tempBlurred[3];
     int32_t *tempBlurredPast[3];

     /** Temporary buffers for handling the last row(s) */
     uint8_t *tempDst;
     uint8_t *tempSrc;

     uint8_t *deintTemp;

     DECLARE_ALIGNED(8, uint64_t, pQPb);
     DECLARE_ALIGNED(8, uint64_t, pQPb2);

     DECLARE_ALIGNED(8, uint64_t, mmxDcOffset)[64];
     DECLARE_ALIGNED(8, uint64_t, mmxDcThreshold)[64];

     QP_STORE_T *stdQPTable;       ///< used to fix MPEG2 style qscale
     QP_STORE_T *nonBQPTable;
     QP_STORE_T *forcedQPTable;

     int QP;
     int nonBQP;

     int frameNum;

     int cpuCaps;

     int qpStride; ///<size of qp buffers (needed to realloc them if needed)
     int stride;   ///<size of some buffers (needed to realloc them if needed)

     int hChromaSubSample;
     int vChromaSubSample;

     PPMode ppMode;

 } PPContext;
 

 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);
     }

 }

 #endif /* POSTPROC_POSTPROCESS_INTERNAL_H */