libavfilter/libmpcodecs/vf_hqdn3d.c - third_party/ffmpeg - Git at Google

 /*
  * Copyright (C) 2003 Daniel Moreno <comac@comac.darktech.org>
  *
  * This file is part of MPlayer.
  *
  * MPlayer 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.
  *
  * MPlayer 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 MPlayer; if not, write to the Free Software Foundation, Inc.,
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */

 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <inttypes.h>
 #include <math.h>

 #include "mp_msg.h"
 #include "img_format.h"
 #include "mp_image.h"
 #include "vf.h"

 #define PARAM1_DEFAULT 4.0
 #define PARAM2_DEFAULT 3.0
 #define PARAM3_DEFAULT 6.0

 //===========================================================================//

 struct vf_priv_s {
         int Coefs[4][512*16];
         unsigned int *Line;
         unsigned short *Frame[3];
 };


 /***************************************************************************/

 static void uninit(struct vf_instance *vf)
 {
         free(vf->priv->Line);
         free(vf->priv->Frame[0]);
         free(vf->priv->Frame[1]);
         free(vf->priv->Frame[2]);

         vf->priv->Line     = NULL;
         vf->priv->Frame[0] = NULL;
         vf->priv->Frame[1] = NULL;
         vf->priv->Frame[2] = NULL;
 }

 static int config(struct vf_instance *vf,
         int width, int height, int d_width, int d_height,
         unsigned int flags, unsigned int outfmt){

         uninit(vf);
         vf->priv->Line = malloc(width*sizeof(int));

         return vf_next_config(vf,width,height,d_width,d_height,flags,outfmt);
 }

 static inline unsigned int LowPassMul(unsigned int PrevMul, unsigned int CurrMul, int* Coef){
 //    int dMul= (PrevMul&0xFFFFFF)-(CurrMul&0xFFFFFF);
     int dMul= PrevMul-CurrMul;
     unsigned int d=((dMul+0x10007FF)>>12);
     return CurrMul + Coef[d];
 }

 static void deNoiseTemporal(
                     unsigned char *Frame,        // mpi->planes[x]
                     unsigned char *FrameDest,    // dmpi->planes[x]
                     unsigned short *FrameAnt,
                     int W, int H, int sStride, int dStride,
                     int *Temporal)
 {
     long X, Y;
     unsigned int PixelDst;

     for (Y = 0; Y < H; Y++){
         for (X = 0; X < W; X++){
             PixelDst = LowPassMul(FrameAnt[X]<<8, Frame[X]<<16, Temporal);
             FrameAnt[X] = ((PixelDst+0x1000007F)>>8);
             FrameDest[X]= ((PixelDst+0x10007FFF)>>16);
         }
         Frame += sStride;
         FrameDest += dStride;
         FrameAnt += W;
     }
 }

 static void deNoiseSpacial(
                     unsigned char *Frame,        // mpi->planes[x]
                     unsigned char *FrameDest,    // dmpi->planes[x]
                     unsigned int *LineAnt,       // vf->priv->Line (width bytes)
                     int W, int H, int sStride, int dStride,
                     int *Horizontal, int *Vertical)
 {
     long X, Y;
     long sLineOffs = 0, dLineOffs = 0;
     unsigned int PixelAnt;
     unsigned int PixelDst;

     /* First pixel has no left nor top neighbor. */
     PixelDst = LineAnt[0] = PixelAnt = Frame[0]<<16;
     FrameDest[0]= ((PixelDst+0x10007FFF)>>16);

     /* First line has no top neighbor, only left. */
     for (X = 1; X < W; X++){
         PixelDst = LineAnt[X] = LowPassMul(PixelAnt, Frame[X]<<16, Horizontal);
         FrameDest[X]= ((PixelDst+0x10007FFF)>>16);
     }

     for (Y = 1; Y < H; Y++){
         unsigned int PixelAnt;
         sLineOffs += sStride, dLineOffs += dStride;
         /* First pixel on each line doesn't have previous pixel */
         PixelAnt = Frame[sLineOffs]<<16;
         PixelDst = LineAnt[0] = LowPassMul(LineAnt[0], PixelAnt, Vertical);
         FrameDest[dLineOffs]= ((PixelDst+0x10007FFF)>>16);

         for (X = 1; X < W; X++){
             unsigned int PixelDst;
             /* The rest are normal */
             PixelAnt = LowPassMul(PixelAnt, Frame[sLineOffs+X]<<16, Horizontal);
             PixelDst = LineAnt[X] = LowPassMul(LineAnt[X], PixelAnt, Vertical);
             FrameDest[dLineOffs+X]= ((PixelDst+0x10007FFF)>>16);
         }
     }
 }

 static void deNoise(unsigned char *Frame,        // mpi->planes[x]
                     unsigned char *FrameDest,    // dmpi->planes[x]
                     unsigned int *LineAnt,      // vf->priv->Line (width bytes)
                     unsigned short **FrameAntPtr,
                     int W, int H, int sStride, int dStride,
                     int *Horizontal, int *Vertical, int *Temporal)
 {
     long X, Y;
     long sLineOffs = 0, dLineOffs = 0;
     unsigned int PixelAnt;
     unsigned int PixelDst;
     unsigned short* FrameAnt=(*FrameAntPtr);

     if(!FrameAnt){
         (*FrameAntPtr)=FrameAnt=malloc(W*H*sizeof(unsigned short));
         for (Y = 0; Y < H; Y++){
             unsigned short* dst=&FrameAnt[Y*W];
             unsigned char* src=Frame+Y*sStride;
             for (X = 0; X < W; X++) dst[X]=src[X]<<8;
         }
     }

     if(!Horizontal[0] && !Vertical[0]){
         deNoiseTemporal(Frame, FrameDest, FrameAnt,
                         W, H, sStride, dStride, Temporal);
         return;
     }
     if(!Temporal[0]){
         deNoiseSpacial(Frame, FrameDest, LineAnt,
                        W, H, sStride, dStride, Horizontal, Vertical);
         return;
     }

     /* First pixel has no left nor top neighbor. Only previous frame */
     LineAnt[0] = PixelAnt = Frame[0]<<16;
     PixelDst = LowPassMul(FrameAnt[0]<<8, PixelAnt, Temporal);
     FrameAnt[0] = ((PixelDst+0x1000007F)>>8);
     FrameDest[0]= ((PixelDst+0x10007FFF)>>16);

     /* First line has no top neighbor. Only left one for each pixel and
      * last frame */
     for (X = 1; X < W; X++){
         LineAnt[X] = PixelAnt = LowPassMul(PixelAnt, Frame[X]<<16, Horizontal);
         PixelDst = LowPassMul(FrameAnt[X]<<8, PixelAnt, Temporal);
         FrameAnt[X] = ((PixelDst+0x1000007F)>>8);
         FrameDest[X]= ((PixelDst+0x10007FFF)>>16);
     }

     for (Y = 1; Y < H; Y++){
         unsigned int PixelAnt;
         unsigned short* LinePrev=&FrameAnt[Y*W];
         sLineOffs += sStride, dLineOffs += dStride;
         /* First pixel on each line doesn't have previous pixel */
         PixelAnt = Frame[sLineOffs]<<16;
         LineAnt[0] = LowPassMul(LineAnt[0], PixelAnt, Vertical);
         PixelDst = LowPassMul(LinePrev[0]<<8, LineAnt[0], Temporal);
         LinePrev[0] = ((PixelDst+0x1000007F)>>8);
         FrameDest[dLineOffs]= ((PixelDst+0x10007FFF)>>16);

         for (X = 1; X < W; X++){
             unsigned int PixelDst;
             /* The rest are normal */
             PixelAnt = LowPassMul(PixelAnt, Frame[sLineOffs+X]<<16, Horizontal);
             LineAnt[X] = LowPassMul(LineAnt[X], PixelAnt, Vertical);
             PixelDst = LowPassMul(LinePrev[X]<<8, LineAnt[X], Temporal);
             LinePrev[X] = ((PixelDst+0x1000007F)>>8);
             FrameDest[dLineOffs+X]= ((PixelDst+0x10007FFF)>>16);
         }
     }
 }


 static int put_image(struct vf_instance *vf, mp_image_t *mpi, double pts){
         int cw= mpi->w >> mpi->chroma_x_shift;
         int ch= mpi->h >> mpi->chroma_y_shift;
         int W = mpi->w, H = mpi->h;

         mp_image_t *dmpi=vf_get_image(vf->next,mpi->imgfmt,
                 MP_IMGTYPE_TEMP, MP_IMGFLAG_ACCEPT_STRIDE,
                 mpi->w,mpi->h);

         if(!dmpi) return 0;

         deNoise(mpi->planes[0], dmpi->planes[0],
                 vf->priv->Line, &vf->priv->Frame[0], W, H,
                 mpi->stride[0], dmpi->stride[0],
                 vf->priv->Coefs[0],
                 vf->priv->Coefs[0],
                 vf->priv->Coefs[1]);
         deNoise(mpi->planes[1], dmpi->planes[1],
                 vf->priv->Line, &vf->priv->Frame[1], cw, ch,
                 mpi->stride[1], dmpi->stride[1],
                 vf->priv->Coefs[2],
                 vf->priv->Coefs[2],
                 vf->priv->Coefs[3]);
         deNoise(mpi->planes[2], dmpi->planes[2],
                 vf->priv->Line, &vf->priv->Frame[2], cw, ch,
                 mpi->stride[2], dmpi->stride[2],
                 vf->priv->Coefs[2],
                 vf->priv->Coefs[2],
                 vf->priv->Coefs[3]);

         return vf_next_put_image(vf,dmpi, pts);
 }

 //===========================================================================//

 static int query_format(struct vf_instance *vf, unsigned int fmt){
         switch(fmt)
         {
         case IMGFMT_YV12:
         case IMGFMT_I420:
         case IMGFMT_IYUV:
         case IMGFMT_YVU9:
         case IMGFMT_444P:
         case IMGFMT_422P:
         case IMGFMT_411P:
                 return vf_next_query_format(vf, fmt);
         }
         return 0;
 }


 #define ABS(A) ( (A) > 0 ? (A) : -(A) )

 static void PrecalcCoefs(int *Ct, double Dist25)
 {
     int i;
     double Gamma, Simil, C;

     Gamma = log(0.25) / log(1.0 - Dist25/255.0 - 0.00001);

     for (i = -255*16; i <= 255*16; i++)
     {
         Simil = 1.0 - ABS(i) / (16*255.0);
         C = pow(Simil, Gamma) * 65536.0 * (double)i / 16.0;
         Ct[16*256+i] = (C<0) ? (C-0.5) : (C+0.5);
     }

     Ct[0] = (Dist25 != 0);
 }


 static int vf_open(vf_instance_t *vf, char *args){
         double LumSpac, LumTmp, ChromSpac, ChromTmp;
         double Param1, Param2, Param3, Param4;

         vf->config=config;
         vf->put_image=put_image;
         vf->query_format=query_format;
         vf->uninit=uninit;
         vf->priv=malloc(sizeof(struct vf_priv_s));
         memset(vf->priv, 0, sizeof(struct vf_priv_s));

         if (args)
         {
             switch(sscanf(args, "%lf:%lf:%lf:%lf",
                           &Param1, &Param2, &Param3, &Param4
                          ))
             {
             case 0:
                 LumSpac = PARAM1_DEFAULT;
                 LumTmp = PARAM3_DEFAULT;

                 ChromSpac = PARAM2_DEFAULT;
                 ChromTmp = LumTmp * ChromSpac / LumSpac;
                 break;

             case 1:
                 LumSpac = Param1;
                 LumTmp = PARAM3_DEFAULT * Param1 / PARAM1_DEFAULT;

                 ChromSpac = PARAM2_DEFAULT * Param1 / PARAM1_DEFAULT;
                 ChromTmp = LumTmp * ChromSpac / LumSpac;
                 break;

             case 2:
                 LumSpac = Param1;
                 LumTmp = PARAM3_DEFAULT * Param1 / PARAM1_DEFAULT;

                 ChromSpac = Param2;
                 ChromTmp = LumTmp * ChromSpac / LumSpac;
                 break;

             case 3:
                 LumSpac = Param1;
                 LumTmp = Param3;

                 ChromSpac = Param2;
                 ChromTmp = LumTmp * ChromSpac / LumSpac;
                 break;

             case 4:
                 LumSpac = Param1;
                 LumTmp = Param3;

                 ChromSpac = Param2;
                 ChromTmp = Param4;
                 break;

             default:
                 LumSpac = PARAM1_DEFAULT;
                 LumTmp = PARAM3_DEFAULT;

                 ChromSpac = PARAM2_DEFAULT;
                 ChromTmp = LumTmp * ChromSpac / LumSpac;
             }
         }
         else
         {
             LumSpac = PARAM1_DEFAULT;
             LumTmp = PARAM3_DEFAULT;

             ChromSpac = PARAM2_DEFAULT;
             ChromTmp = LumTmp * ChromSpac / LumSpac;
         }

         PrecalcCoefs(vf->priv->Coefs[0], LumSpac);
         PrecalcCoefs(vf->priv->Coefs[1], LumTmp);
         PrecalcCoefs(vf->priv->Coefs[2], ChromSpac);
         PrecalcCoefs(vf->priv->Coefs[3], ChromTmp);

         return 1;
 }

 const vf_info_t vf_info_hqdn3d = {
     "High Quality 3D Denoiser",
     "hqdn3d",
     "Daniel Moreno & A'rpi",
     "",
     vf_open,
     NULL
 };

 //===========================================================================//
	/*
	* Copyright (C) 2003 Daniel Moreno <comac@comac.darktech.org>
	*
	* This file is part of MPlayer.
	*
	* MPlayer 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.
	*
	* MPlayer 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 MPlayer; if not, write to the Free Software Foundation, Inc.,
	* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
	*/

	#include <stdio.h>
	#include <stdlib.h>
	#include <string.h>
	#include <inttypes.h>
	#include <math.h>

	#include "mp_msg.h"
	#include "img_format.h"
	#include "mp_image.h"
	#include "vf.h"

	#define PARAM1_DEFAULT 4.0
	#define PARAM2_DEFAULT 3.0
	#define PARAM3_DEFAULT 6.0

	//===========================================================================//

	struct vf_priv_s {
	int Coefs[4][512*16];
	unsigned int *Line;
	unsigned short *Frame[3];
	};


	/***************************************************************************/

	static void uninit(struct vf_instance *vf)
	{
	free(vf->priv->Line);
	free(vf->priv->Frame[0]);
	free(vf->priv->Frame[1]);
	free(vf->priv->Frame[2]);

	vf->priv->Line = NULL;
	vf->priv->Frame[0] = NULL;
	vf->priv->Frame[1] = NULL;
	vf->priv->Frame[2] = NULL;
	}

	static int config(struct vf_instance *vf,
	int width, int height, int d_width, int d_height,
	unsigned int flags, unsigned int outfmt){

	uninit(vf);
	vf->priv->Line = malloc(width*sizeof(int));

	return vf_next_config(vf,width,height,d_width,d_height,flags,outfmt);
	}

	static inline unsigned int LowPassMul(unsigned int PrevMul, unsigned int CurrMul, int* Coef){
	// int dMul= (PrevMul&0xFFFFFF)-(CurrMul&0xFFFFFF);
	int dMul= PrevMul-CurrMul;
	unsigned int d=((dMul+0x10007FF)>>12);
	return CurrMul + Coef[d];
	}

	static void deNoiseTemporal(
	unsigned char *Frame, // mpi->planes[x]
	unsigned char *FrameDest, // dmpi->planes[x]
	unsigned short *FrameAnt,
	int W, int H, int sStride, int dStride,
	int *Temporal)
	{
	long X, Y;
	unsigned int PixelDst;

	for (Y = 0; Y < H; Y++){
	for (X = 0; X < W; X++){
	PixelDst = LowPassMul(FrameAnt[X]<<8, Frame[X]<<16, Temporal);
	FrameAnt[X] = ((PixelDst+0x1000007F)>>8);
	FrameDest[X]= ((PixelDst+0x10007FFF)>>16);
	}
	Frame += sStride;
	FrameDest += dStride;
	FrameAnt += W;
	}
	}

	static void deNoiseSpacial(
	unsigned char *Frame, // mpi->planes[x]
	unsigned char *FrameDest, // dmpi->planes[x]
	unsigned int *LineAnt, // vf->priv->Line (width bytes)
	int W, int H, int sStride, int dStride,
	int Horizontal, int Vertical)
	{
	long X, Y;
	long sLineOffs = 0, dLineOffs = 0;
	unsigned int PixelAnt;
	unsigned int PixelDst;

	/* First pixel has no left nor top neighbor. */
	PixelDst = LineAnt[0] = PixelAnt = Frame[0]<<16;
	FrameDest[0]= ((PixelDst+0x10007FFF)>>16);

	/* First line has no top neighbor, only left. */
	for (X = 1; X < W; X++){
	PixelDst = LineAnt[X] = LowPassMul(PixelAnt, Frame[X]<<16, Horizontal);
	FrameDest[X]= ((PixelDst+0x10007FFF)>>16);
	}

	for (Y = 1; Y < H; Y++){
	unsigned int PixelAnt;
	sLineOffs += sStride, dLineOffs += dStride;
	/* First pixel on each line doesn't have previous pixel */
	PixelAnt = Frame[sLineOffs]<<16;
	PixelDst = LineAnt[0] = LowPassMul(LineAnt[0], PixelAnt, Vertical);
	FrameDest[dLineOffs]= ((PixelDst+0x10007FFF)>>16);

	for (X = 1; X < W; X++){
	unsigned int PixelDst;
	/* The rest are normal */
	PixelAnt = LowPassMul(PixelAnt, Frame[sLineOffs+X]<<16, Horizontal);
	PixelDst = LineAnt[X] = LowPassMul(LineAnt[X], PixelAnt, Vertical);
	FrameDest[dLineOffs+X]= ((PixelDst+0x10007FFF)>>16);
	}
	}
	}

	static void deNoise(unsigned char *Frame, // mpi->planes[x]
	unsigned char *FrameDest, // dmpi->planes[x]
	unsigned int *LineAnt, // vf->priv->Line (width bytes)
	unsigned short **FrameAntPtr,
	int W, int H, int sStride, int dStride,
	int Horizontal, int Vertical, int *Temporal)
	{
	long X, Y;
	long sLineOffs = 0, dLineOffs = 0;
	unsigned int PixelAnt;
	unsigned int PixelDst;
	unsigned short* FrameAnt=(*FrameAntPtr);

	if(!FrameAnt){
	(FrameAntPtr)=FrameAnt=malloc(WH*sizeof(unsigned short));
	for (Y = 0; Y < H; Y++){
	unsigned short* dst=&FrameAnt[Y*W];
	unsigned char* src=Frame+Y*sStride;
	for (X = 0; X < W; X++) dst[X]=src[X]<<8;
	}
	}

	if(!Horizontal[0] && !Vertical[0]){
	deNoiseTemporal(Frame, FrameDest, FrameAnt,
	W, H, sStride, dStride, Temporal);
	return;
	}
	if(!Temporal[0]){
	deNoiseSpacial(Frame, FrameDest, LineAnt,
	W, H, sStride, dStride, Horizontal, Vertical);
	return;
	}

	/* First pixel has no left nor top neighbor. Only previous frame */
	LineAnt[0] = PixelAnt = Frame[0]<<16;
	PixelDst = LowPassMul(FrameAnt[0]<<8, PixelAnt, Temporal);
	FrameAnt[0] = ((PixelDst+0x1000007F)>>8);
	FrameDest[0]= ((PixelDst+0x10007FFF)>>16);

	/* First line has no top neighbor. Only left one for each pixel and
	* last frame */
	for (X = 1; X < W; X++){
	LineAnt[X] = PixelAnt = LowPassMul(PixelAnt, Frame[X]<<16, Horizontal);
	PixelDst = LowPassMul(FrameAnt[X]<<8, PixelAnt, Temporal);
	FrameAnt[X] = ((PixelDst+0x1000007F)>>8);
	FrameDest[X]= ((PixelDst+0x10007FFF)>>16);
	}

	for (Y = 1; Y < H; Y++){
	unsigned int PixelAnt;
	unsigned short* LinePrev=&FrameAnt[Y*W];
	sLineOffs += sStride, dLineOffs += dStride;
	/* First pixel on each line doesn't have previous pixel */
	PixelAnt = Frame[sLineOffs]<<16;
	LineAnt[0] = LowPassMul(LineAnt[0], PixelAnt, Vertical);
	PixelDst = LowPassMul(LinePrev[0]<<8, LineAnt[0], Temporal);
	LinePrev[0] = ((PixelDst+0x1000007F)>>8);
	FrameDest[dLineOffs]= ((PixelDst+0x10007FFF)>>16);

	for (X = 1; X < W; X++){
	unsigned int PixelDst;
	/* The rest are normal */
	PixelAnt = LowPassMul(PixelAnt, Frame[sLineOffs+X]<<16, Horizontal);
	LineAnt[X] = LowPassMul(LineAnt[X], PixelAnt, Vertical);
	PixelDst = LowPassMul(LinePrev[X]<<8, LineAnt[X], Temporal);
	LinePrev[X] = ((PixelDst+0x1000007F)>>8);
	FrameDest[dLineOffs+X]= ((PixelDst+0x10007FFF)>>16);
	}
	}
	}


	static int put_image(struct vf_instance vf, mp_image_t mpi, double pts){
	int cw= mpi->w >> mpi->chroma_x_shift;
	int ch= mpi->h >> mpi->chroma_y_shift;
	int W = mpi->w, H = mpi->h;

	mp_image_t *dmpi=vf_get_image(vf->next,mpi->imgfmt,
	MP_IMGTYPE_TEMP, MP_IMGFLAG_ACCEPT_STRIDE,
	mpi->w,mpi->h);

	if(!dmpi) return 0;

	deNoise(mpi->planes[0], dmpi->planes[0],
	vf->priv->Line, &vf->priv->Frame[0], W, H,
	mpi->stride[0], dmpi->stride[0],
	vf->priv->Coefs[0],
	vf->priv->Coefs[0],
	vf->priv->Coefs[1]);
	deNoise(mpi->planes[1], dmpi->planes[1],
	vf->priv->Line, &vf->priv->Frame[1], cw, ch,
	mpi->stride[1], dmpi->stride[1],
	vf->priv->Coefs[2],
	vf->priv->Coefs[2],
	vf->priv->Coefs[3]);
	deNoise(mpi->planes[2], dmpi->planes[2],
	vf->priv->Line, &vf->priv->Frame[2], cw, ch,
	mpi->stride[2], dmpi->stride[2],
	vf->priv->Coefs[2],
	vf->priv->Coefs[2],
	vf->priv->Coefs[3]);

	return vf_next_put_image(vf,dmpi, pts);
	}

	//===========================================================================//

	static int query_format(struct vf_instance *vf, unsigned int fmt){
	switch(fmt)
	{
	case IMGFMT_YV12:
	case IMGFMT_I420:
	case IMGFMT_IYUV:
	case IMGFMT_YVU9:
	case IMGFMT_444P:
	case IMGFMT_422P:
	case IMGFMT_411P:
	return vf_next_query_format(vf, fmt);
	}
	return 0;
	}


	#define ABS(A) ( (A) > 0 ? (A) : -(A) )

	static void PrecalcCoefs(int *Ct, double Dist25)
	{
	int i;
	double Gamma, Simil, C;

	Gamma = log(0.25) / log(1.0 - Dist25/255.0 - 0.00001);

	for (i = -25516; i <= 25516; i++)
	{
	Simil = 1.0 - ABS(i) / (16*255.0);
	C = pow(Simil, Gamma) * 65536.0 * (double)i / 16.0;
	Ct[16*256+i] = (C<0) ? (C-0.5) : (C+0.5);
	}

	Ct[0] = (Dist25 != 0);
	}


	static int vf_open(vf_instance_t vf, char args){
	double LumSpac, LumTmp, ChromSpac, ChromTmp;
	double Param1, Param2, Param3, Param4;

	vf->config=config;
	vf->put_image=put_image;
	vf->query_format=query_format;
	vf->uninit=uninit;
	vf->priv=malloc(sizeof(struct vf_priv_s));
	memset(vf->priv, 0, sizeof(struct vf_priv_s));

	if (args)
	{
	switch(sscanf(args, "%lf:%lf:%lf:%lf",
	&Param1, &Param2, &Param3, &Param4
	))
	{
	case 0:
	LumSpac = PARAM1_DEFAULT;
	LumTmp = PARAM3_DEFAULT;

	ChromSpac = PARAM2_DEFAULT;
	ChromTmp = LumTmp * ChromSpac / LumSpac;
	break;

	case 1:
	LumSpac = Param1;
	LumTmp = PARAM3_DEFAULT * Param1 / PARAM1_DEFAULT;

	ChromSpac = PARAM2_DEFAULT * Param1 / PARAM1_DEFAULT;
	ChromTmp = LumTmp * ChromSpac / LumSpac;
	break;

	case 2:
	LumSpac = Param1;
	LumTmp = PARAM3_DEFAULT * Param1 / PARAM1_DEFAULT;

	ChromSpac = Param2;
	ChromTmp = LumTmp * ChromSpac / LumSpac;
	break;

	case 3:
	LumSpac = Param1;
	LumTmp = Param3;

	ChromSpac = Param2;
	ChromTmp = LumTmp * ChromSpac / LumSpac;
	break;

	case 4:
	LumSpac = Param1;
	LumTmp = Param3;

	ChromSpac = Param2;
	ChromTmp = Param4;
	break;

	default:
	LumSpac = PARAM1_DEFAULT;
	LumTmp = PARAM3_DEFAULT;

	ChromSpac = PARAM2_DEFAULT;
	ChromTmp = LumTmp * ChromSpac / LumSpac;
	}
	}
	else
	{
	LumSpac = PARAM1_DEFAULT;
	LumTmp = PARAM3_DEFAULT;

	ChromSpac = PARAM2_DEFAULT;
	ChromTmp = LumTmp * ChromSpac / LumSpac;
	}

	PrecalcCoefs(vf->priv->Coefs[0], LumSpac);
	PrecalcCoefs(vf->priv->Coefs[1], LumTmp);
	PrecalcCoefs(vf->priv->Coefs[2], ChromSpac);
	PrecalcCoefs(vf->priv->Coefs[3], ChromTmp);

	return 1;
	}

	const vf_info_t vf_info_hqdn3d = {
	"High Quality 3D Denoiser",
	"hqdn3d",
	"Daniel Moreno & A'rpi",
	"",
	vf_open,
	NULL
	};

	//===========================================================================//