diff options
Diffstat (limited to 'libavfilter/libmpcodecs/vf_smartblur.c')
-rw-r--r-- | libavfilter/libmpcodecs/vf_smartblur.c | 264 |
1 files changed, 264 insertions, 0 deletions
diff --git a/libavfilter/libmpcodecs/vf_smartblur.c b/libavfilter/libmpcodecs/vf_smartblur.c new file mode 100644 index 0000000..3f0d7c3 --- /dev/null +++ b/libavfilter/libmpcodecs/vf_smartblur.c @@ -0,0 +1,264 @@ +/* + * Copyright (C) 2002 Michael Niedermayer <michaelni@gmx.at> + * + * 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 <assert.h> + +#include "mp_msg.h" +#include "libavutil/avutil.h" +#include "img_format.h" +#include "mp_image.h" +#include "vf.h" +#include "libswscale/swscale.h" +#include "vf_scale.h" + +//===========================================================================// + +typedef struct FilterParam{ + float radius; + float strength; + int threshold; + float quality; + struct SwsContext *filterContext; +}FilterParam; + +struct vf_priv_s { + FilterParam luma; + FilterParam chroma; +}; + + +/***************************************************************************/ + +//FIXME stupid code duplication +static void getSubSampleFactors(int *h, int *v, int format){ + switch(format){ + default: + assert(0); + case IMGFMT_YV12: + case IMGFMT_I420: + *h=1; + *v=1; + break; + case IMGFMT_YVU9: + *h=2; + *v=2; + break; + case IMGFMT_444P: + *h=0; + *v=0; + break; + case IMGFMT_422P: + *h=1; + *v=0; + break; + case IMGFMT_411P: + *h=2; + *v=0; + break; + } +} + +static int allocStuff(FilterParam *f, int width, int height){ + SwsVector *vec; + SwsFilter swsF; + + vec = sws_getGaussianVec(f->radius, f->quality); + sws_scaleVec(vec, f->strength); + vec->coeff[vec->length/2]+= 1.0 - f->strength; + swsF.lumH= swsF.lumV= vec; + swsF.chrH= swsF.chrV= NULL; + f->filterContext= sws_getContext( + width, height, PIX_FMT_GRAY8, width, height, PIX_FMT_GRAY8, SWS_BICUBIC, &swsF, NULL, NULL); + + sws_freeVec(vec); + + return 0; +} + +static int config(struct vf_instance *vf, + int width, int height, int d_width, int d_height, + unsigned int flags, unsigned int outfmt){ + + int sw, sh; + + allocStuff(&vf->priv->luma, width, height); + + getSubSampleFactors(&sw, &sh, outfmt); + allocStuff(&vf->priv->chroma, width>>sw, height>>sh); + + return vf_next_config(vf,width,height,d_width,d_height,flags,outfmt); +} + +static void freeBuffers(FilterParam *f){ + if(f->filterContext) sws_freeContext(f->filterContext); + f->filterContext=NULL; +} + +static void uninit(struct vf_instance *vf){ + if(!vf->priv) return; + + freeBuffers(&vf->priv->luma); + freeBuffers(&vf->priv->chroma); + + free(vf->priv); + vf->priv=NULL; +} + +static inline void blur(uint8_t *dst, uint8_t *src, int w, int h, int dstStride, int srcStride, FilterParam *fp){ + int x, y; + FilterParam f= *fp; + const uint8_t* const srcArray[MP_MAX_PLANES] = {src}; + uint8_t *dstArray[MP_MAX_PLANES]= {dst}; + int srcStrideArray[MP_MAX_PLANES]= {srcStride}; + int dstStrideArray[MP_MAX_PLANES]= {dstStride}; + + sws_scale(f.filterContext, srcArray, srcStrideArray, 0, h, dstArray, dstStrideArray); + + if(f.threshold > 0){ + for(y=0; y<h; y++){ + for(x=0; x<w; x++){ + const int orig= src[x + y*srcStride]; + const int filtered= dst[x + y*dstStride]; + const int diff= orig - filtered; + + if(diff > 0){ + if(diff > 2*f.threshold){ + dst[x + y*dstStride]= orig; + }else if(diff > f.threshold){ + dst[x + y*dstStride]= filtered + diff - f.threshold; + } + }else{ + if(-diff > 2*f.threshold){ + dst[x + y*dstStride]= orig; + }else if(-diff > f.threshold){ + dst[x + y*dstStride]= filtered + diff + f.threshold; + } + } + } + } + }else if(f.threshold < 0){ + for(y=0; y<h; y++){ + for(x=0; x<w; x++){ + const int orig= src[x + y*srcStride]; + const int filtered= dst[x + y*dstStride]; + const int diff= orig - filtered; + + if(diff > 0){ + if(diff > -2*f.threshold){ + }else if(diff > -f.threshold){ + dst[x + y*dstStride]= orig - diff - f.threshold; + }else + dst[x + y*dstStride]= orig; + }else{ + if(diff < 2*f.threshold){ + }else if(diff < f.threshold){ + dst[x + y*dstStride]= orig - diff + f.threshold; + }else + dst[x + y*dstStride]= orig; + } + } + } + } +} + +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 threshold = vf->priv->luma.threshold || vf->priv->chroma.threshold; + + mp_image_t *dmpi=vf_get_image(vf->next,mpi->imgfmt, + MP_IMGTYPE_TEMP, MP_IMGFLAG_ACCEPT_STRIDE| + (threshold ? MP_IMGFLAG_READABLE : 0), + mpi->w,mpi->h); + + assert(mpi->flags&MP_IMGFLAG_PLANAR); + + blur(dmpi->planes[0], mpi->planes[0], mpi->w,mpi->h, dmpi->stride[0], mpi->stride[0], &vf->priv->luma); + blur(dmpi->planes[1], mpi->planes[1], cw , ch , dmpi->stride[1], mpi->stride[1], &vf->priv->chroma); + blur(dmpi->planes[2], mpi->planes[2], cw , ch , dmpi->stride[2], mpi->stride[2], &vf->priv->chroma); + + 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; +} + +static int vf_open(vf_instance_t *vf, char *args){ + int e; + + vf->config=config; + vf->put_image=put_image; +// vf->get_image=get_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==NULL) return 0; + + e=sscanf(args, "%f:%f:%d:%f:%f:%d", + &vf->priv->luma.radius, + &vf->priv->luma.strength, + &vf->priv->luma.threshold, + &vf->priv->chroma.radius, + &vf->priv->chroma.strength, + &vf->priv->chroma.threshold + ); + + vf->priv->luma.quality = vf->priv->chroma.quality= 3.0; + + if(e==3){ + vf->priv->chroma.radius= vf->priv->luma.radius; + vf->priv->chroma.strength= vf->priv->luma.strength; + vf->priv->chroma.threshold = vf->priv->luma.threshold; + }else if(e!=6) + return 0; + + return 1; +} + +const vf_info_t vf_info_smartblur = { + "smart blur", + "smartblur", + "Michael Niedermayer", + "", + vf_open, + NULL +}; + +//===========================================================================// |