mirror of
https://github.com/mpv-player/mpv
synced 2024-12-23 23:32:26 +00:00
perspective correcture filter
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@8113 b3059339-0415-0410-9bf9-f77b7e298cf2
This commit is contained in:
michael
parent
4bd3d1a5bd
commit
0e0224913f
@ -209,3 +209,7 @@ Current plugins:
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radius blur filter strength (~0.1-5.0) (slower if larger)
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strength (0.0-1.0) -> blur, (-1.0-0.0) -> sharpen
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threshold 0 -> filter all, (0-30) -> filter flat areas, (-30-0) -> filter edges
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-vop perspective=x0:y0:x1:y1:x2:y2:x3:y3:t
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x0,y0,... coordinates of the topleft, topright, bottomleft, bottomright corners
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t 0-> linear, 1->cubic resampling
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@ -14,7 +14,7 @@ VIDEO_SRCS_NAT=vd_null.c vd_cinepak.c vd_qtrpza.c vd_raw.c vd_msvidc.c vd_fli.c
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VIDEO_SRCS_OPT=vd_realvid.c vd_ffmpeg.c vd_dshow.c vd_vfw.c vd_vfwex.c vd_odivx.c vd_divx4.c vd_xanim.c vd_xvid.c vd_libdv.c
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VIDEO_SRCS=dec_video.c vd.c $(VIDEO_SRCS_NAT) $(VIDEO_SRCS_LIB) $(VIDEO_SRCS_OPT)
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VFILTER_SRCS=vf.c vf_vo.c vf_crop.c vf_expand.c vf_pp.c vf_scale.c vf_format.c vf_yuy2.c vf_flip.c vf_rgb2bgr.c vf_rotate.c vf_mirror.c vf_palette.c vf_lavc.c vf_dvbscale.c vf_cropdetect.c vf_test.c vf_noise.c vf_yvu9.c vf_rectangle.c vf_lavcdeint.c vf_eq.c vf_eq2.c vf_halfpack.c vf_dint.c vf_1bpp.c vf_bmovl.c vf_2xsai.c vf_unsharp.c vf_swapuv.c vf_il.c vf_boxblur.c vf_sab.c vf_smartblur.c
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VFILTER_SRCS=vf.c vf_vo.c vf_crop.c vf_expand.c vf_pp.c vf_scale.c vf_format.c vf_yuy2.c vf_flip.c vf_rgb2bgr.c vf_rotate.c vf_mirror.c vf_palette.c vf_lavc.c vf_dvbscale.c vf_cropdetect.c vf_test.c vf_noise.c vf_yvu9.c vf_rectangle.c vf_lavcdeint.c vf_eq.c vf_eq2.c vf_halfpack.c vf_dint.c vf_1bpp.c vf_bmovl.c vf_2xsai.c vf_unsharp.c vf_swapuv.c vf_il.c vf_boxblur.c vf_sab.c vf_smartblur.c vf_perspective.c
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ENCODER_SRCS=ve.c ve_divx4.c ve_lavc.c ve_vfw.c ve_rawrgb.c ve_libdv.c ve_xvid.c
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NATIVE_SRCS=native/RTjpegN.c native/cinepak.c native/cyuv.c native/fli.c native/minilzo.c native/msvidc.c native/nuppelvideo.c native/qtrle.c native/qtrpza.c native/qtsmc.c native/roqav.c native/xa_gsm.c native/svq1.c
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@ -51,6 +51,7 @@ extern vf_info_t vf_info_il;
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extern vf_info_t vf_info_boxblur;
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extern vf_info_t vf_info_sab;
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extern vf_info_t vf_info_smartblur;
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extern vf_info_t vf_info_perspective;
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char** vo_plugin_args=(char**) NULL;
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@ -95,6 +96,7 @@ static vf_info_t* filter_list[]={
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&vf_info_boxblur,
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&vf_info_sab,
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&vf_info_smartblur,
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&vf_info_perspective,
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NULL
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};
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341
libmpcodecs/vf_perspective.c
Normal file
341
libmpcodecs/vf_perspective.c
Normal file
@ -0,0 +1,341 @@
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/*
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Copyright (C) 2002 Michael Niedermayer <michaelni@gmx.at>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <inttypes.h>
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#include <assert.h>
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#include <math.h>
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#include "../config.h"
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#include "../mp_msg.h"
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#ifdef HAVE_MALLOC_H
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#include <malloc.h>
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#endif
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#include "img_format.h"
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#include "mp_image.h"
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#include "vf.h"
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#include "../libvo/fastmemcpy.h"
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#define SUB_PIXEL_BITS 8
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#define SUB_PIXELS (1<<SUB_PIXEL_BITS)
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#define COEFF_BITS 11
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//===========================================================================//
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struct vf_priv_s {
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double ref[4][2];
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int32_t coeff[1<<SUB_PIXEL_BITS][4];
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int32_t (*pv)[2];
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int pvStride;
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int cubic;
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};
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/***************************************************************************/
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static void initPv(struct vf_priv_s *priv, int W, int H){
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double a,b,c,d,e,f,g,h,D;
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double (*ref)[2]= priv->ref;
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int x,y;
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g= ( (ref[0][0] - ref[1][0] - ref[2][0] + ref[3][0])*(ref[2][1] - ref[3][1])
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- (ref[0][1] - ref[1][1] - ref[2][1] + ref[3][1])*(ref[2][0] - ref[3][0]))*H;
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h= ( (ref[0][1] - ref[1][1] - ref[2][1] + ref[3][1])*(ref[1][0] - ref[3][0])
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- (ref[0][0] - ref[1][0] - ref[2][0] + ref[3][0])*(ref[1][1] - ref[3][1]))*W;
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D= (ref[1][0] - ref[3][0])*(ref[2][1] - ref[3][1])
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- (ref[2][0] - ref[3][0])*(ref[1][1] - ref[3][1]);
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a= D*(ref[1][0] - ref[0][0])*H + g*ref[1][0];
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b= D*(ref[2][0] - ref[0][0])*W + h*ref[2][0];
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c= D*ref[0][0]*W*H;
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d= D*(ref[1][1] - ref[0][1])*H + g*ref[1][1];
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e= D*(ref[2][1] - ref[0][1])*W + h*ref[2][1];
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f= D*ref[0][1]*W*H;
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for(y=0; y<H; y++){
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for(x=0; x<W; x++){
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int u, v;
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u= (int)floor( SUB_PIXELS*(a*x + b*y + c)/(g*x + h*y + D*W*H) + 0.5);
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v= (int)floor( SUB_PIXELS*(d*x + e*y + f)/(g*x + h*y + D*W*H) + 0.5);
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priv->pv[x + y*W][0]= u;
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priv->pv[x + y*W][1]= v;
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}
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}
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}
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static double getCoeff(double d){
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double A= -0.60;
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double coeff;
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d= fabs(d);
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// Equation is from VirtualDub
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if(d<1.0)
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coeff = (1.0 - (A+3.0)*d*d + (A+2.0)*d*d*d);
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else if(d<2.0)
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coeff = (-4.0*A + 8.0*A*d - 5.0*A*d*d + A*d*d*d);
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else
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coeff=0.0;
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return coeff;
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}
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static int config(struct vf_instance_s* vf,
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int width, int height, int d_width, int d_height,
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unsigned int flags, unsigned int outfmt){
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int i, j;
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vf->priv->pvStride= width;
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vf->priv->pv= (void*)memalign(8, width*height*2*sizeof(int32_t));
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initPv(vf->priv, width, height);
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for(i=0; i<SUB_PIXELS; i++){
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double d= i/(double)SUB_PIXELS;
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double temp[4];
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double sum=0;
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for(j=0; j<4; j++)
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temp[j]= getCoeff(j - d - 1);
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for(j=0; j<4; j++)
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sum+= temp[j];
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for(j=0; j<4; j++)
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vf->priv->coeff[i][j]= (int)floor((1<<COEFF_BITS)*temp[j]/sum + 0.5);
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}
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return vf_next_config(vf,width,height,d_width,d_height,flags,outfmt);
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}
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static void uninit(struct vf_instance_s* vf){
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if(!vf->priv) return;
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if(vf->priv->pv) free(vf->priv->pv);
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vf->priv->pv= NULL;
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free(vf->priv);
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vf->priv=NULL;
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}
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static inline void resampleCubic(uint8_t *dst, uint8_t *src, int w, int h, int dstStride, int srcStride, struct vf_priv_s *privParam, int xShift, int yShift){
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int x, y;
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struct vf_priv_s priv= *privParam;
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for(y=0; y<h; y++){
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for(x=0; x<w; x++){
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int u, v, subU, subV, sum, sx, sy;
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sx= x << xShift;
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sy= y << yShift;
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u= priv.pv[sx + sy*priv.pvStride][0]>>xShift;
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v= priv.pv[sx + sy*priv.pvStride][1]>>yShift;
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subU= u & (SUB_PIXELS-1);
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subV= v & (SUB_PIXELS-1);
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u >>= SUB_PIXEL_BITS;
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v >>= SUB_PIXEL_BITS;
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if(u>0 && v>0 && u<w-2 && v<h-2){
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const int index= u + v*srcStride;
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const int a= priv.coeff[subU][0];
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const int b= priv.coeff[subU][1];
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const int c= priv.coeff[subU][2];
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const int d= priv.coeff[subU][3];
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sum=
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priv.coeff[subV][0]*( a*src[index - 1 - srcStride] + b*src[index - 0 - srcStride]
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+ c*src[index + 1 - srcStride] + d*src[index + 2 - srcStride])
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+priv.coeff[subV][1]*( a*src[index - 1 ] + b*src[index - 0 ]
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+ c*src[index + 1 ] + d*src[index + 2 ])
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+priv.coeff[subV][2]*( a*src[index - 1 + srcStride] + b*src[index - 0 + srcStride]
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+ c*src[index + 1 + srcStride] + d*src[index + 2 + srcStride])
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+priv.coeff[subV][3]*( a*src[index - 1+2*srcStride] + b*src[index - 0+2*srcStride]
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+ c*src[index + 1+2*srcStride] + d*src[index + 2+2*srcStride]);
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}else{
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int dx, dy;
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sum=0;
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for(dy=0; dy<4; dy++){
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int iy= v + dy - 1;
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if (iy< 0) iy=0;
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else if(iy>=h) iy=h-1;
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for(dx=0; dx<4; dx++){
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int ix= u + dx - 1;
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if (ix< 0) ix=0;
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else if(ix>=w) ix=w-1;
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sum+= priv.coeff[subU][dx]*priv.coeff[subV][dy]
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*src[ ix + iy*srcStride];
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}
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}
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}
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sum= (sum + (1<<(COEFF_BITS*2-1)) ) >> (COEFF_BITS*2);
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if(sum&~255){
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if(sum<0) sum=0;
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else sum=255;
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}
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dst[ x + y*dstStride]= sum;
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}
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}
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}
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static inline void resampleLinear(uint8_t *dst, uint8_t *src, int w, int h, int dstStride, int srcStride,
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struct vf_priv_s *privParam, int xShift, int yShift){
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int x, y;
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struct vf_priv_s priv= *privParam;
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for(y=0; y<h; y++){
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for(x=0; x<w; x++){
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int u, v, subU, subV, sum, sx, sy, index, subUI, subVI;
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sx= x << xShift;
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sy= y << yShift;
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u= priv.pv[sx + sy*priv.pvStride][0]>>xShift;
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v= priv.pv[sx + sy*priv.pvStride][1]>>yShift;
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subU= u & (SUB_PIXELS-1);
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subV= v & (SUB_PIXELS-1);
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u >>= SUB_PIXEL_BITS;
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v >>= SUB_PIXEL_BITS;
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index= u + v*srcStride;
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subUI= SUB_PIXELS - subU;
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subVI= SUB_PIXELS - subV;
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if((unsigned)u < (unsigned)(w - 1)){
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if((unsigned)v < (unsigned)(h - 1)){
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sum= subVI*(subUI*src[index ] + subU*src[index +1])
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+subV *(subUI*src[index+srcStride] + subU*src[index+srcStride+1]);
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sum= (sum + (1<<(SUB_PIXEL_BITS*2-1)) ) >> (SUB_PIXEL_BITS*2);
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}else{
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if(v<0) v= 0;
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else v= h-1;
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index= u + v*srcStride;
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sum= subUI*src[index] + subU*src[index+1];
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sum= (sum + (1<<(SUB_PIXEL_BITS-1)) ) >> SUB_PIXEL_BITS;
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}
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}else{
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if((unsigned)v < (unsigned)(h - 1)){
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if(u<0) u= 0;
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else u= w-1;
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index= u + v*srcStride;
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sum= subVI*src[index] + subV*src[index+srcStride];
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sum= (sum + (1<<(SUB_PIXEL_BITS-1)) ) >> SUB_PIXEL_BITS;
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}else{
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if(u<0) u= 0;
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else u= w-1;
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if(v<0) v= 0;
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else v= h-1;
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index= u + v*srcStride;
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sum= src[index];
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}
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}
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if(sum&~255){
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if(sum<0) sum=0;
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else sum=255;
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}
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dst[ x + y*dstStride]= sum;
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}
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}
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}
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static int put_image(struct vf_instance_s* vf, mp_image_t *mpi){
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int cw= mpi->w >> mpi->chroma_x_shift;
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int ch= mpi->h >> mpi->chroma_y_shift;
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mp_image_t *dmpi=vf_get_image(vf->next,mpi->imgfmt,
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MP_IMGTYPE_TEMP, MP_IMGFLAG_ACCEPT_STRIDE,
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mpi->w,mpi->h);
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assert(mpi->flags&MP_IMGFLAG_PLANAR);
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if(vf->priv->cubic){
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resampleCubic(dmpi->planes[0], mpi->planes[0], mpi->w,mpi->h, dmpi->stride[0], mpi->stride[0],
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vf->priv, 0, 0);
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resampleCubic(dmpi->planes[1], mpi->planes[1], cw , ch , dmpi->stride[1], mpi->stride[1],
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vf->priv, mpi->chroma_x_shift, mpi->chroma_y_shift);
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resampleCubic(dmpi->planes[2], mpi->planes[2], cw , ch , dmpi->stride[2], mpi->stride[2],
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vf->priv, mpi->chroma_x_shift, mpi->chroma_y_shift);
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}else{
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resampleLinear(dmpi->planes[0], mpi->planes[0], mpi->w,mpi->h, dmpi->stride[0], mpi->stride[0],
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vf->priv, 0, 0);
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resampleLinear(dmpi->planes[1], mpi->planes[1], cw , ch , dmpi->stride[1], mpi->stride[1],
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vf->priv, mpi->chroma_x_shift, mpi->chroma_y_shift);
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resampleLinear(dmpi->planes[2], mpi->planes[2], cw , ch , dmpi->stride[2], mpi->stride[2],
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vf->priv, mpi->chroma_x_shift, mpi->chroma_y_shift);
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}
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return vf_next_put_image(vf,dmpi);
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}
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//===========================================================================//
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static int query_format(struct vf_instance_s* vf, unsigned int fmt){
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switch(fmt)
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{
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case IMGFMT_YV12:
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case IMGFMT_I420:
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case IMGFMT_IYUV:
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case IMGFMT_YVU9:
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case IMGFMT_444P:
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case IMGFMT_422P:
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case IMGFMT_411P:
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return vf_next_query_format(vf, fmt);
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}
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return 0;
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}
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static int open(vf_instance_t *vf, char* args){
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int e;
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vf->config=config;
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vf->put_image=put_image;
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// vf->get_image=get_image;
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vf->query_format=query_format;
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vf->uninit=uninit;
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vf->priv=malloc(sizeof(struct vf_priv_s));
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memset(vf->priv, 0, sizeof(struct vf_priv_s));
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if(args==NULL) return 0;
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e=sscanf(args, "%lf:%lf:%lf:%lf:%lf:%lf:%lf:%lf:%d",
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&vf->priv->ref[0][0], &vf->priv->ref[0][1],
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&vf->priv->ref[1][0], &vf->priv->ref[1][1],
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&vf->priv->ref[2][0], &vf->priv->ref[2][1],
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&vf->priv->ref[3][0], &vf->priv->ref[3][1],
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&vf->priv->cubic
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);
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if(e!=9)
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return 0;
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return 1;
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}
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|
||||
vf_info_t vf_info_perspective = {
|
||||
"perspective correcture",
|
||||
"perspective",
|
||||
"Michael Niedermayer",
|
||||
"",
|
||||
open
|
||||
};
|
||||
|
||||
//===========================================================================//
|
||||
Loading…
Reference in New Issue
Block a user