mirror of
https://github.com/mpv-player/mpv
synced 2024-12-25 16:33:02 +00:00
b4c74fb28e
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@18005 b3059339-0415-0410-9bf9-f77b7e298cf2
284 lines
7.2 KiB
C
284 lines
7.2 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <limits.h>
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#include "config.h"
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#include "mp_msg.h"
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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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enum mode { PROGRESSIVE, TOP_FIRST, BOTTOM_FIRST,
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TOP_FIRST_ANALYZE, BOTTOM_FIRST_ANALYZE,
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ANALYZE, FULL_ANALYZE, AUTO, AUTO_ANALYZE };
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#define fixed_mode(p) ((p)<=BOTTOM_FIRST)
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struct vf_priv_s
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{
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enum mode mode;
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int verbose;
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unsigned char *buf[3];
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};
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/*
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* Copy fields from either current or buffered previous frame to the
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* output and store the current frame unmodified to the buffer.
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*/
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static void do_plane(unsigned char *to, unsigned char *from,
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int w, int h, int ts, int fs,
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unsigned char **bufp, enum mode mode)
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{
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unsigned char *buf, *end;
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int top;
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if(!*bufp)
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{
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mode=PROGRESSIVE;
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if(!(*bufp=malloc(h*w))) return;
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}
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for(end=to+h*ts, buf=*bufp, top=1; to<end; from+=fs, to+=ts, buf+=w, top^=1)
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{
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memcpy(to, mode==(top?BOTTOM_FIRST:TOP_FIRST)?buf:from, w);
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memcpy(buf, from, w);
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}
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}
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/*
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* This macro interpolates the value of both fields at a point halfway
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* between lines and takes the squared difference. In field resolution
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* the point is a quarter pixel below a line in one field and a quarter
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* pixel above a line in other.
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*
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* (the result is actually multiplied by 25)
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*/
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#define diff(a, as, b, bs) (t=((*a-b[bs])<<2)+a[as<<1]-b[-bs], t*t)
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/*
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* Find which field combination has the smallest average squared difference
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* between the fields.
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*/
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static enum mode analyze_plane(unsigned char *old, unsigned char *new,
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int w, int h, int os, int ns, enum mode mode,
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int verbose, int fields)
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{
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double bdiff, pdiff, tdiff, scale;
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int bdif, tdif, pdif;
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int top, t;
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unsigned char *end, *rend;
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if(mode==AUTO)
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mode=fields&MP_IMGFIELD_ORDERED?fields&MP_IMGFIELD_TOP_FIRST?
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TOP_FIRST:BOTTOM_FIRST:PROGRESSIVE;
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else if(mode==AUTO_ANALYZE)
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mode=fields&MP_IMGFIELD_ORDERED?fields&MP_IMGFIELD_TOP_FIRST?
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TOP_FIRST_ANALYZE:BOTTOM_FIRST_ANALYZE:FULL_ANALYZE;
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if(fixed_mode(mode))
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bdiff=pdiff=tdiff=65536.0;
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else
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{
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bdiff=pdiff=tdiff=0.0;
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for(end=new+(h-2)*ns, new+=ns, old+=os, top=0;
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new<end; new+=ns-w, old+=os-w, top^=1)
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{
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pdif=tdif=bdif=0;
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switch(mode)
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{
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case TOP_FIRST_ANALYZE:
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if(top)
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for(rend=new+w; new<rend; new++, old++)
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pdif+=diff(new, ns, new, ns),
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tdif+=diff(new, ns, old, os);
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else
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for(rend=new+w; new<rend; new++, old++)
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pdif+=diff(new, ns, new, ns),
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tdif+=diff(old, os, new, ns);
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break;
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case BOTTOM_FIRST_ANALYZE:
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if(top)
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for(rend=new+w; new<rend; new++, old++)
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pdif+=diff(new, ns, new, ns),
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bdif+=diff(old, os, new, ns);
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else
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for(rend=new+w; new<rend; new++, old++)
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pdif+=diff(new, ns, new, ns),
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bdif+=diff(new, ns, old, os);
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break;
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case ANALYZE:
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if(top)
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for(rend=new+w; new<rend; new++, old++)
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tdif+=diff(new, ns, old, os),
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bdif+=diff(old, os, new, ns);
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else
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for(rend=new+w; new<rend; new++, old++)
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bdif+=diff(new, ns, old, os),
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tdif+=diff(old, os, new, ns);
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break;
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default: /* FULL_ANALYZE */
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if(top)
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for(rend=new+w; new<rend; new++, old++)
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pdif+=diff(new, ns, new, ns),
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tdif+=diff(new, ns, old, os),
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bdif+=diff(old, os, new, ns);
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else
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for(rend=new+w; new<rend; new++, old++)
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pdif+=diff(new, ns, new, ns),
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bdif+=diff(new, ns, old, os),
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tdif+=diff(old, os, new, ns);
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}
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pdiff+=(double)pdif;
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tdiff+=(double)tdif;
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bdiff+=(double)bdif;
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}
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scale=1.0/(w*(h-3))/25.0;
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pdiff*=scale;
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tdiff*=scale;
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bdiff*=scale;
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if(mode==TOP_FIRST_ANALYZE)
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bdiff=65536.0;
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else if(mode==BOTTOM_FIRST_ANALYZE)
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tdiff=65536.0;
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else if(mode==ANALYZE)
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pdiff=65536.0;
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if(bdiff<pdiff && bdiff<tdiff)
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mode=BOTTOM_FIRST;
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else if(tdiff<pdiff && tdiff<bdiff)
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mode=TOP_FIRST;
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else
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mode=PROGRESSIVE;
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}
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if( mp_msg_test(MSGT_VFILTER,MSGL_V) )
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{
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mp_msg(MSGT_VFILTER, MSGL_INFO, "%c", mode==BOTTOM_FIRST?'b':mode==TOP_FIRST?'t':'p');
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if(tdiff==65536.0) mp_msg(MSGT_VFILTER, MSGL_INFO," N/A "); else mp_msg(MSGT_VFILTER, MSGL_INFO," %8.2f", tdiff);
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if(bdiff==65536.0) mp_msg(MSGT_VFILTER, MSGL_INFO," N/A "); else mp_msg(MSGT_VFILTER, MSGL_INFO," %8.2f", bdiff);
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if(pdiff==65536.0) mp_msg(MSGT_VFILTER, MSGL_INFO," N/A "); else mp_msg(MSGT_VFILTER, MSGL_INFO," %8.2f", pdiff);
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mp_msg(MSGT_VFILTER, MSGL_INFO," \n");
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}
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return mode;
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}
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static int put_image(struct vf_instance_s* vf, mp_image_t *mpi, double pts)
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{
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mp_image_t *dmpi;
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int w;
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enum mode mode;
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if(!(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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return 0;
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w=dmpi->w;
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if(!(dmpi->flags&MP_IMGFLAG_PLANAR))
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w*=dmpi->bpp/8;
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mode=vf->priv->mode;
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if(!vf->priv->buf[0])
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mode=PROGRESSIVE;
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else
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mode=analyze_plane(vf->priv->buf[0], mpi->planes[0],
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w, dmpi->h, w, mpi->stride[0], mode,
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vf->priv->verbose, mpi->fields);
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do_plane(dmpi->planes[0], mpi->planes[0],
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w, dmpi->h,
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dmpi->stride[0], mpi->stride[0],
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&vf->priv->buf[0], mode);
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if(dmpi->flags&MP_IMGFLAG_PLANAR)
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{
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do_plane(dmpi->planes[1], mpi->planes[1],
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dmpi->chroma_width, dmpi->chroma_height,
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dmpi->stride[1], mpi->stride[1],
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&vf->priv->buf[1], mode);
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do_plane(dmpi->planes[2], mpi->planes[2],
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dmpi->chroma_width, dmpi->chroma_height,
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dmpi->stride[2], mpi->stride[2],
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&vf->priv->buf[2], mode);
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}
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return vf_next_put_image(vf, dmpi, MP_NOPTS_VALUE);
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}
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static void uninit(struct vf_instance_s* vf)
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{
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free(vf->priv->buf[0]);
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free(vf->priv->buf[1]);
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free(vf->priv->buf[2]);
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free(vf->priv);
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}
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static int open(vf_instance_t *vf, char* args)
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{
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vf->put_image = put_image;
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vf->uninit = uninit;
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vf->default_reqs = VFCAP_ACCEPT_STRIDE;
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if(!(vf->priv = calloc(1, sizeof(struct vf_priv_s))))
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{
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uninit(vf);
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return 0;
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}
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vf->priv->mode=AUTO_ANALYZE;
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vf->priv->verbose=0;
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while(args && *args)
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{
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switch(*args)
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{
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case 't': vf->priv->mode=TOP_FIRST; break;
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case 'a': vf->priv->mode=AUTO; break;
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case 'b': vf->priv->mode=BOTTOM_FIRST; break;
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case 'u': vf->priv->mode=ANALYZE; break;
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case 'T': vf->priv->mode=TOP_FIRST_ANALYZE; break;
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case 'A': vf->priv->mode=AUTO_ANALYZE; break;
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case 'B': vf->priv->mode=BOTTOM_FIRST_ANALYZE; break;
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case 'U': vf->priv->mode=FULL_ANALYZE; break;
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case 'p': vf->priv->mode=PROGRESSIVE; break;
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case 'v': vf->priv->verbose=1; break;
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case ':': break;
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default:
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uninit(vf);
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return 0; /* bad args */
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}
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if( (args=strchr(args, ':')) ) args++;
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}
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return 1;
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}
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vf_info_t vf_info_phase =
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{
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"phase shift fields",
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"phase",
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"Ville Saari",
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"",
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open,
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NULL
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};
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