libmpcodecs/vf_smartblur.c

   1 /*
   2     Copyright (C) 2002 Michael Niedermayer <michaelni@gmx.at>
   3
   4     This program is free software; you can redistribute it and/or modify
   5     it under the terms of the GNU General Public License as published by
   6     the Free Software Foundation; either version 2 of the License, or
   7     (at your option) any later version.
   8
   9     This program is distributed in the hope that it will be useful,
  10     but WITHOUT ANY WARRANTY; without even the implied warranty of
  11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12     GNU General Public License for more details.
  13
  14     You should have received a copy of the GNU General Public License
  15     along with this program; if not, write to the Free Software
  16     Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  17 */
  18
  19 #include <stdio.h>
  20 #include <stdlib.h>
  21 #include <string.h>
  22 #include <inttypes.h>
  23 #include <assert.h>
  24
  25 #include "config.h"
  26 #include "mp_msg.h"
  27
  28 #ifdef HAVE_MALLOC_H
  29 #include <malloc.h>
  30 #endif
  31
  32 #ifdef USE_LIBAVUTIL_SO
  33 #include <ffmpeg/avutil.h>
  34 #else
  35 #include "avutil.h"
  36 #endif
  37 #include "img_format.h"
  38 #include "mp_image.h"
  39 #include "vf.h"
  40 #include "libswscale/swscale.h"
  41 #include "vf_scale.h"
  42
  43 //===========================================================================//
  44
  45 typedef struct FilterParam{
  46         float radius;
  47         float strength;
  48         int threshold;
  49         float quality;
  50         struct SwsContext *filterContext;
  51 }FilterParam;
  52
  53 struct vf_priv_s {
  54         FilterParam luma;
  55         FilterParam chroma;
  56 };
  57
  58
  59 /***************************************************************************/
  60
  61 //FIXME stupid code duplication
  62 static void getSubSampleFactors(int *h, int *v, int format){
  63         switch(format){
  64         case IMGFMT_YV12:
  65         case IMGFMT_I420:
  66                 *h=1;
  67                 *v=1;
  68                 break;
  69         case IMGFMT_YVU9:
  70                 *h=2;
  71                 *v=2;
  72                 break;
  73         case IMGFMT_444P:
  74                 *h=0;
  75                 *v=0;
  76                 break;
  77         case IMGFMT_422P:
  78                 *h=1;
  79                 *v=0;
  80                 break;
  81         case IMGFMT_411P:
  82                 *h=2;
  83                 *v=0;
  84                 break;
  85         }
  86 }
  87
  88 static int allocStuff(FilterParam *f, int width, int height){
  89         SwsVector *vec;
  90         SwsFilter swsF;
  91
  92         vec = sws_getGaussianVec(f->radius, f->quality);
  93         sws_scaleVec(vec, f->strength);
  94         vec->coeff[vec->length/2]+= 1.0 - f->strength;
  95         swsF.lumH= swsF.lumV= vec;
  96         swsF.chrH= swsF.chrV= NULL;
  97         f->filterContext= sws_getContext(
  98                 width, height, PIX_FMT_GRAY8, width, height, PIX_FMT_GRAY8, get_sws_cpuflags(), &swsF, NULL, NULL);
  99
 100         sws_freeVec(vec);
 101
 102         return 0;
 103 }
 104
 105 static int config(struct vf_instance_s* vf,
 106         int width, int height, int d_width, int d_height,
 107         unsigned int flags, unsigned int outfmt){
 108
 109         int sw, sh;
 110
 111         allocStuff(&vf->priv->luma, width, height);
 112
 113         getSubSampleFactors(&sw, &sh, outfmt);
 114         allocStuff(&vf->priv->chroma, width>>sw, height>>sh);
 115
 116         return vf_next_config(vf,width,height,d_width,d_height,flags,outfmt);
 117 }
 118
 119 static void freeBuffers(FilterParam *f){
 120         if(f->filterContext) sws_freeContext(f->filterContext);
 121         f->filterContext=NULL;
 122 }
 123
 124 static void uninit(struct vf_instance_s* vf){
 125         if(!vf->priv) return;
 126
 127         freeBuffers(&vf->priv->luma);
 128         freeBuffers(&vf->priv->chroma);
 129
 130         free(vf->priv);
 131         vf->priv=NULL;
 132 }
 133
 134 static inline void blur(uint8_t *dst, uint8_t *src, int w, int h, int dstStride, int srcStride, FilterParam *fp){
 135         int x, y;
 136         FilterParam f= *fp;
 137         uint8_t *srcArray[3]= {src, NULL, NULL};
 138         uint8_t *dstArray[3]= {dst, NULL, NULL};
 139         int srcStrideArray[3]= {srcStride, 0, 0};
 140         int dstStrideArray[3]= {dstStride, 0, 0};
 141
 142         sws_scale(f.filterContext, srcArray, srcStrideArray, 0, h, dstArray, dstStrideArray);
 143
 144         if(f.threshold > 0){
 145                 for(y=0; y<h; y++){
 146                         for(x=0; x<w; x++){
 147                                 const int orig= src[x + y*srcStride];
 148                                 const int filtered= dst[x + y*dstStride];
 149                                 const int diff= orig - filtered;
 150
 151                                 if(diff > 0){
 152                                         if(diff > 2*f.threshold){
 153                                                 dst[x + y*dstStride]= orig;
 154                                         }else if(diff > f.threshold){
 155                                                 dst[x + y*dstStride]= filtered + diff - f.threshold;
 156                                         }
 157                                 }else{
 158                                         if(-diff > 2*f.threshold){
 159                                                 dst[x + y*dstStride]= orig;
 160                                         }else if(-diff > f.threshold){
 161                                                 dst[x + y*dstStride]= filtered + diff + f.threshold;
 162                                         }
 163                                 }
 164                         }
 165                 }
 166         }else if(f.threshold < 0){
 167                 for(y=0; y<h; y++){
 168                         for(x=0; x<w; x++){
 169                                 const int orig= src[x + y*srcStride];
 170                                 const int filtered= dst[x + y*dstStride];
 171                                 const int diff= orig - filtered;
 172
 173                                 if(diff > 0){
 174                                         if(diff > -2*f.threshold){
 175                                         }else if(diff > -f.threshold){
 176                                                 dst[x + y*dstStride]= orig - diff - f.threshold;
 177                                         }else
 178                                                 dst[x + y*dstStride]= orig;
 179                                 }else{
 180                                         if(diff < 2*f.threshold){
 181                                         }else if(diff < f.threshold){
 182                                                 dst[x + y*dstStride]= orig - diff + f.threshold;
 183                                         }else
 184                                                 dst[x + y*dstStride]= orig;
 185                                 }
 186                         }
 187                 }
 188         }
 189 }
 190
 191 static int put_image(struct vf_instance_s* vf, mp_image_t *mpi, double pts){
 192         int cw= mpi->w >> mpi->chroma_x_shift;
 193         int ch= mpi->h >> mpi->chroma_y_shift;
 194         FilterParam *f= &vf->priv;
 195
 196         mp_image_t *dmpi=vf_get_image(vf->next,mpi->imgfmt,
 197                 MP_IMGTYPE_TEMP, MP_IMGFLAG_ACCEPT_STRIDE|
 198                 (f->threshold) ? MP_IMGFLAG_READABLE : 0,
 199                 mpi->w,mpi->h);
 200
 201         assert(mpi->flags&MP_IMGFLAG_PLANAR);
 202
 203         blur(dmpi->planes[0], mpi->planes[0], mpi->w,mpi->h, dmpi->stride[0], mpi->stride[0], &vf->priv->luma);
 204         blur(dmpi->planes[1], mpi->planes[1], cw    , ch   , dmpi->stride[1], mpi->stride[1], &vf->priv->chroma);
 205         blur(dmpi->planes[2], mpi->planes[2], cw    , ch   , dmpi->stride[2], mpi->stride[2], &vf->priv->chroma);
 206
 207         return vf_next_put_image(vf,dmpi, pts);
 208 }
 209
 210 //===========================================================================//
 211
 212 static int query_format(struct vf_instance_s* vf, unsigned int fmt){
 213         switch(fmt)
 214         {
 215         case IMGFMT_YV12:
 216         case IMGFMT_I420:
 217         case IMGFMT_IYUV:
 218         case IMGFMT_YVU9:
 219         case IMGFMT_444P:
 220         case IMGFMT_422P:
 221         case IMGFMT_411P:
 222                 return vf_next_query_format(vf, fmt);
 223         }
 224         return 0;
 225 }
 226
 227 static int open(vf_instance_t *vf, char* args){
 228         int e;
 229
 230         vf->config=config;
 231         vf->put_image=put_image;
 232 //      vf->get_image=get_image;
 233         vf->query_format=query_format;
 234         vf->uninit=uninit;
 235         vf->priv=malloc(sizeof(struct vf_priv_s));
 236         memset(vf->priv, 0, sizeof(struct vf_priv_s));
 237
 238         if(args==NULL) return 0;
 239
 240         e=sscanf(args, "%f:%f:%d:%f:%f:%d",
 241                 &vf->priv->luma.radius,
 242                 &vf->priv->luma.strength,
 243                 &vf->priv->luma.threshold,
 244                 &vf->priv->chroma.radius,
 245                 &vf->priv->chroma.strength,
 246                 &vf->priv->chroma.threshold
 247                 );
 248
 249         vf->priv->luma.quality = vf->priv->chroma.quality= 3.0;
 250
 251         if(e==3){
 252                 vf->priv->chroma.radius= vf->priv->luma.radius;
 253                 vf->priv->chroma.strength= vf->priv->luma.strength;
 254                 vf->priv->chroma.threshold = vf->priv->luma.threshold;
 255         }else if(e!=6)
 256                 return 0;
 257
 258         return 1;
 259 }
 260
 261 const vf_info_t vf_info_smartblur = {
 262     "smart blur",
 263     "smartblur",
 264     "Michael Niedermayer",
 265     "",
 266     open,
 267     NULL
 268 };
 269
 270 //===========================================================================//