libmpcodecs/vf_smartblur.c

   1 /*
   2  * Copyright (C) 2002 Michael Niedermayer <michaelni@gmx.at>
   3  *
   4  * This file is part of MPlayer.
   5  *
   6  * MPlayer is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * MPlayer is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along
  17  * with MPlayer; if not, write to the Free Software Foundation, Inc.,
  18  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  19  */
  20
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include <string.h>
  24 #include <inttypes.h>
  25 #include <assert.h>
  26
  27 #include "mp_msg.h"
  28 #include "libavutil/avutil.h"
  29 #include "img_format.h"
  30 #include "mp_image.h"
  31 #include "vf.h"
  32 #include "libswscale/swscale.h"
  33 #include "vf_scale.h"
  34
  35 //===========================================================================//
  36
  37 typedef struct FilterParam{
  38         float radius;
  39         float strength;
  40         int threshold;
  41         float quality;
  42         struct SwsContext *filterContext;
  43 }FilterParam;
  44
  45 struct vf_priv_s {
  46         FilterParam luma;
  47         FilterParam chroma;
  48 };
  49
  50
  51 /***************************************************************************/
  52
  53 //FIXME stupid code duplication
  54 static void getSubSampleFactors(int *h, int *v, int format){
  55         switch(format){
  56         case IMGFMT_YV12:
  57         case IMGFMT_I420:
  58                 *h=1;
  59                 *v=1;
  60                 break;
  61         case IMGFMT_YVU9:
  62                 *h=2;
  63                 *v=2;
  64                 break;
  65         case IMGFMT_444P:
  66                 *h=0;
  67                 *v=0;
  68                 break;
  69         case IMGFMT_422P:
  70                 *h=1;
  71                 *v=0;
  72                 break;
  73         case IMGFMT_411P:
  74                 *h=2;
  75                 *v=0;
  76                 break;
  77         }
  78 }
  79
  80 static int allocStuff(FilterParam *f, int width, int height){
  81         SwsVector *vec;
  82         SwsFilter swsF;
  83
  84         vec = sws_getGaussianVec(f->radius, f->quality);
  85         sws_scaleVec(vec, f->strength);
  86         vec->coeff[vec->length/2]+= 1.0 - f->strength;
  87         swsF.lumH= swsF.lumV= vec;
  88         swsF.chrH= swsF.chrV= NULL;
  89         f->filterContext= sws_getContext(
  90                 width, height, PIX_FMT_GRAY8, width, height, PIX_FMT_GRAY8, SWS_BICUBIC | get_sws_cpuflags(), &swsF, NULL, NULL);
  91
  92         sws_freeVec(vec);
  93
  94         return 0;
  95 }
  96
  97 static int config(struct vf_instance *vf,
  98         int width, int height, int d_width, int d_height,
  99         unsigned int flags, unsigned int outfmt){
 100
 101         int sw, sh;
 102
 103         allocStuff(&vf->priv->luma, width, height);
 104
 105         getSubSampleFactors(&sw, &sh, outfmt);
 106         allocStuff(&vf->priv->chroma, width>>sw, height>>sh);
 107
 108         return vf_next_config(vf,width,height,d_width,d_height,flags,outfmt);
 109 }
 110
 111 static void freeBuffers(FilterParam *f){
 112         if(f->filterContext) sws_freeContext(f->filterContext);
 113         f->filterContext=NULL;
 114 }
 115
 116 static void uninit(struct vf_instance *vf){
 117         if(!vf->priv) return;
 118
 119         freeBuffers(&vf->priv->luma);
 120         freeBuffers(&vf->priv->chroma);
 121
 122         free(vf->priv);
 123         vf->priv=NULL;
 124 }
 125
 126 static inline void blur(uint8_t *dst, uint8_t *src, int w, int h, int dstStride, int srcStride, FilterParam *fp){
 127         int x, y;
 128         FilterParam f= *fp;
 129         uint8_t *srcArray[MP_MAX_PLANES]= {src};
 130         uint8_t *dstArray[MP_MAX_PLANES]= {dst};
 131         int srcStrideArray[MP_MAX_PLANES]= {srcStride};
 132         int dstStrideArray[MP_MAX_PLANES]= {dstStride};
 133
 134         sws_scale(f.filterContext, srcArray, srcStrideArray, 0, h, dstArray, dstStrideArray);
 135
 136         if(f.threshold > 0){
 137                 for(y=0; y<h; y++){
 138                         for(x=0; x<w; x++){
 139                                 const int orig= src[x + y*srcStride];
 140                                 const int filtered= dst[x + y*dstStride];
 141                                 const int diff= orig - filtered;
 142
 143                                 if(diff > 0){
 144                                         if(diff > 2*f.threshold){
 145                                                 dst[x + y*dstStride]= orig;
 146                                         }else if(diff > f.threshold){
 147                                                 dst[x + y*dstStride]= filtered + diff - f.threshold;
 148                                         }
 149                                 }else{
 150                                         if(-diff > 2*f.threshold){
 151                                                 dst[x + y*dstStride]= orig;
 152                                         }else if(-diff > f.threshold){
 153                                                 dst[x + y*dstStride]= filtered + diff + f.threshold;
 154                                         }
 155                                 }
 156                         }
 157                 }
 158         }else if(f.threshold < 0){
 159                 for(y=0; y<h; y++){
 160                         for(x=0; x<w; x++){
 161                                 const int orig= src[x + y*srcStride];
 162                                 const int filtered= dst[x + y*dstStride];
 163                                 const int diff= orig - filtered;
 164
 165                                 if(diff > 0){
 166                                         if(diff > -2*f.threshold){
 167                                         }else if(diff > -f.threshold){
 168                                                 dst[x + y*dstStride]= orig - diff - f.threshold;
 169                                         }else
 170                                                 dst[x + y*dstStride]= orig;
 171                                 }else{
 172                                         if(diff < 2*f.threshold){
 173                                         }else if(diff < f.threshold){
 174                                                 dst[x + y*dstStride]= orig - diff + f.threshold;
 175                                         }else
 176                                                 dst[x + y*dstStride]= orig;
 177                                 }
 178                         }
 179                 }
 180         }
 181 }
 182
 183 static int put_image(struct vf_instance *vf, mp_image_t *mpi, double pts){
 184         int cw= mpi->w >> mpi->chroma_x_shift;
 185         int ch= mpi->h >> mpi->chroma_y_shift;
 186         FilterParam *f= &vf->priv;
 187
 188         mp_image_t *dmpi=vf_get_image(vf->next,mpi->imgfmt,
 189                 MP_IMGTYPE_TEMP, MP_IMGFLAG_ACCEPT_STRIDE|
 190                 (f->threshold) ? MP_IMGFLAG_READABLE : 0,
 191                 mpi->w,mpi->h);
 192
 193         assert(mpi->flags&MP_IMGFLAG_PLANAR);
 194
 195         blur(dmpi->planes[0], mpi->planes[0], mpi->w,mpi->h, dmpi->stride[0], mpi->stride[0], &vf->priv->luma);
 196         blur(dmpi->planes[1], mpi->planes[1], cw    , ch   , dmpi->stride[1], mpi->stride[1], &vf->priv->chroma);
 197         blur(dmpi->planes[2], mpi->planes[2], cw    , ch   , dmpi->stride[2], mpi->stride[2], &vf->priv->chroma);
 198
 199         return vf_next_put_image(vf,dmpi, pts);
 200 }
 201
 202 //===========================================================================//
 203
 204 static int query_format(struct vf_instance *vf, unsigned int fmt){
 205         switch(fmt)
 206         {
 207         case IMGFMT_YV12:
 208         case IMGFMT_I420:
 209         case IMGFMT_IYUV:
 210         case IMGFMT_YVU9:
 211         case IMGFMT_444P:
 212         case IMGFMT_422P:
 213         case IMGFMT_411P:
 214                 return vf_next_query_format(vf, fmt);
 215         }
 216         return 0;
 217 }
 218
 219 static int vf_open(vf_instance_t *vf, char *args){
 220         int e;
 221
 222         vf->config=config;
 223         vf->put_image=put_image;
 224 //      vf->get_image=get_image;
 225         vf->query_format=query_format;
 226         vf->uninit=uninit;
 227         vf->priv=malloc(sizeof(struct vf_priv_s));
 228         memset(vf->priv, 0, sizeof(struct vf_priv_s));
 229
 230         if(args==NULL) return 0;
 231
 232         e=sscanf(args, "%f:%f:%d:%f:%f:%d",
 233                 &vf->priv->luma.radius,
 234                 &vf->priv->luma.strength,
 235                 &vf->priv->luma.threshold,
 236                 &vf->priv->chroma.radius,
 237                 &vf->priv->chroma.strength,
 238                 &vf->priv->chroma.threshold
 239                 );
 240
 241         vf->priv->luma.quality = vf->priv->chroma.quality= 3.0;
 242
 243         if(e==3){
 244                 vf->priv->chroma.radius= vf->priv->luma.radius;
 245                 vf->priv->chroma.strength= vf->priv->luma.strength;
 246                 vf->priv->chroma.threshold = vf->priv->luma.threshold;
 247         }else if(e!=6)
 248                 return 0;
 249
 250         return 1;
 251 }
 252
 253 const vf_info_t vf_info_smartblur = {
 254     "smart blur",
 255     "smartblur",
 256     "Michael Niedermayer",
 257     "",
 258     vf_open,
 259     NULL
 260 };
 261
 262 //===========================================================================//