diff options
Diffstat (limited to 'libavfilter/libmpcodecs/vf_delogo.c')
| -rw-r--r-- | libavfilter/libmpcodecs/vf_delogo.c | 252 |
1 files changed, 252 insertions, 0 deletions
diff --git a/libavfilter/libmpcodecs/vf_delogo.c b/libavfilter/libmpcodecs/vf_delogo.c new file mode 100644 index 0000000000..7a69e57863 --- /dev/null +++ b/libavfilter/libmpcodecs/vf_delogo.c @@ -0,0 +1,252 @@ +/* + * Copyright (C) 2002 Jindrich Makovicka <makovick@gmail.com> + * + * 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. + */ + +/* A very simple tv station logo remover */ + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <inttypes.h> +#include <math.h> + +#include "mp_msg.h" +#include "cpudetect.h" +#include "img_format.h" +#include "mp_image.h" +#include "vf.h" +#include "libvo/fastmemcpy.h" + +//===========================================================================// + +struct vf_priv_s { + unsigned int outfmt; + int xoff, yoff, lw, lh, band, show; +}; + +#define MIN(a,b) (((a) < (b)) ? (a) : (b)) +#define MAX(a,b) (((a) > (b)) ? (a) : (b)) + +static void delogo(uint8_t *dst, uint8_t *src, int dstStride, int srcStride, int width, int height, + int logo_x, int logo_y, int logo_w, int logo_h, int band, int show, int direct) { + int y, x; + int interp, dist; + uint8_t *xdst, *xsrc; + + uint8_t *topleft, *botleft, *topright; + int xclipl, xclipr, yclipt, yclipb; + int logo_x1, logo_x2, logo_y1, logo_y2; + + xclipl = MAX(-logo_x, 0); + xclipr = MAX(logo_x+logo_w-width, 0); + yclipt = MAX(-logo_y, 0); + yclipb = MAX(logo_y+logo_h-height, 0); + + logo_x1 = logo_x + xclipl; + logo_x2 = logo_x + logo_w - xclipr; + logo_y1 = logo_y + yclipt; + logo_y2 = logo_y + logo_h - yclipb; + + topleft = src+logo_y1*srcStride+logo_x1; + topright = src+logo_y1*srcStride+logo_x2-1; + botleft = src+(logo_y2-1)*srcStride+logo_x1; + + if (!direct) memcpy_pic(dst, src, width, height, dstStride, srcStride); + + dst += (logo_y1+1)*dstStride; + src += (logo_y1+1)*srcStride; + + for(y = logo_y1+1; y < logo_y2-1; y++) + { + for (x = logo_x1+1, xdst = dst+logo_x1+1, xsrc = src+logo_x1+1; x < logo_x2-1; x++, xdst++, xsrc++) { + interp = ((topleft[srcStride*(y-logo_y-yclipt)] + + topleft[srcStride*(y-logo_y-1-yclipt)] + + topleft[srcStride*(y-logo_y+1-yclipt)])*(logo_w-(x-logo_x))/logo_w + + (topright[srcStride*(y-logo_y-yclipt)] + + topright[srcStride*(y-logo_y-1-yclipt)] + + topright[srcStride*(y-logo_y+1-yclipt)])*(x-logo_x)/logo_w + + (topleft[x-logo_x-xclipl] + + topleft[x-logo_x-1-xclipl] + + topleft[x-logo_x+1-xclipl])*(logo_h-(y-logo_y))/logo_h + + (botleft[x-logo_x-xclipl] + + botleft[x-logo_x-1-xclipl] + + botleft[x-logo_x+1-xclipl])*(y-logo_y)/logo_h + )/6; +/* interp = (topleft[srcStride*(y-logo_y)]*(logo_w-(x-logo_x))/logo_w + + topright[srcStride*(y-logo_y)]*(x-logo_x)/logo_w + + topleft[x-logo_x]*(logo_h-(y-logo_y))/logo_h + + botleft[x-logo_x]*(y-logo_y)/logo_h + )/2;*/ + if (y >= logo_y+band && y < logo_y+logo_h-band && x >= logo_x+band && x < logo_x+logo_w-band) { + *xdst = interp; + } else { + dist = 0; + if (x < logo_x+band) dist = MAX(dist, logo_x-x+band); + else if (x >= logo_x+logo_w-band) dist = MAX(dist, x-(logo_x+logo_w-1-band)); + if (y < logo_y+band) dist = MAX(dist, logo_y-y+band); + else if (y >= logo_y+logo_h-band) dist = MAX(dist, y-(logo_y+logo_h-1-band)); + *xdst = (*xsrc*dist + interp*(band-dist))/band; + if (show && (dist == band-1)) *xdst = 0; + } + } + + dst+= dstStride; + src+= srcStride; + } +} + +static int config(struct vf_instance *vf, + int width, int height, int d_width, int d_height, + unsigned int flags, unsigned int outfmt){ + + return vf_next_config(vf,width,height,d_width,d_height,flags,outfmt); +} + + +static void get_image(struct vf_instance *vf, mp_image_t *mpi){ + if(mpi->flags&MP_IMGFLAG_PRESERVE) return; // don't change + if(mpi->imgfmt!=vf->priv->outfmt) return; // colorspace differ + // ok, we can do pp in-place (or pp disabled): + vf->dmpi=vf_get_image(vf->next,mpi->imgfmt, + mpi->type, mpi->flags, mpi->w, mpi->h); + mpi->planes[0]=vf->dmpi->planes[0]; + mpi->stride[0]=vf->dmpi->stride[0]; + mpi->width=vf->dmpi->width; + if(mpi->flags&MP_IMGFLAG_PLANAR){ + mpi->planes[1]=vf->dmpi->planes[1]; + mpi->planes[2]=vf->dmpi->planes[2]; + mpi->stride[1]=vf->dmpi->stride[1]; + mpi->stride[2]=vf->dmpi->stride[2]; + } + mpi->flags|=MP_IMGFLAG_DIRECT; +} + +static int put_image(struct vf_instance *vf, mp_image_t *mpi, double pts){ + mp_image_t *dmpi; + + if(!(mpi->flags&MP_IMGFLAG_DIRECT)){ + // no DR, so get a new image! hope we'll get DR buffer: + vf->dmpi=vf_get_image(vf->next,vf->priv->outfmt, + MP_IMGTYPE_TEMP, MP_IMGFLAG_ACCEPT_STRIDE, + mpi->w,mpi->h); + } + dmpi= vf->dmpi; + + delogo(dmpi->planes[0], mpi->planes[0], dmpi->stride[0], mpi->stride[0], mpi->w, mpi->h, + vf->priv->xoff, vf->priv->yoff, vf->priv->lw, vf->priv->lh, vf->priv->band, vf->priv->show, + mpi->flags&MP_IMGFLAG_DIRECT); + delogo(dmpi->planes[1], mpi->planes[1], dmpi->stride[1], mpi->stride[1], mpi->w/2, mpi->h/2, + vf->priv->xoff/2, vf->priv->yoff/2, vf->priv->lw/2, vf->priv->lh/2, vf->priv->band/2, vf->priv->show, + mpi->flags&MP_IMGFLAG_DIRECT); + delogo(dmpi->planes[2], mpi->planes[2], dmpi->stride[2], mpi->stride[2], mpi->w/2, mpi->h/2, + vf->priv->xoff/2, vf->priv->yoff/2, vf->priv->lw/2, vf->priv->lh/2, vf->priv->band/2, vf->priv->show, + mpi->flags&MP_IMGFLAG_DIRECT); + + vf_clone_mpi_attributes(dmpi, mpi); + + return vf_next_put_image(vf,dmpi, pts); +} + +static void uninit(struct vf_instance *vf){ + if(!vf->priv) return; + + free(vf->priv); + vf->priv=NULL; +} + +//===========================================================================// + +static int query_format(struct vf_instance *vf, unsigned int fmt){ + switch(fmt) + { + case IMGFMT_YV12: + case IMGFMT_I420: + case IMGFMT_IYUV: + return vf_next_query_format(vf,vf->priv->outfmt); + } + return 0; +} + +static const unsigned int fmt_list[]={ + IMGFMT_YV12, + IMGFMT_I420, + IMGFMT_IYUV, + 0 +}; + +static int vf_open(vf_instance_t *vf, char *args){ + int res=0; + 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) res = sscanf(args, "%d:%d:%d:%d:%d", + &vf->priv->xoff, &vf->priv->yoff, + &vf->priv->lw, &vf->priv->lh, + &vf->priv->band); + + if (res != 5) { + mp_msg(MSGT_VFILTER, MSGL_ERR, "deLogo: syntax is \"delogo=xoff:yoff:width:height:band\"\n"); + uninit(vf); + return 0; + } + + mp_msg(MSGT_VFILTER, MSGL_V, "delogo: %d x %d, %d x %d, band = %d\n", + vf->priv->xoff, vf->priv->yoff, + vf->priv->lw, vf->priv->lh, + vf->priv->band); + + vf->priv->show = 0; + + if (vf->priv->band < 0) { + vf->priv->band = 4; + vf->priv->show = 1; + } + + + vf->priv->lw += vf->priv->band*2; + vf->priv->lh += vf->priv->band*2; + vf->priv->xoff -= vf->priv->band; + vf->priv->yoff -= vf->priv->band; + + // check csp: + vf->priv->outfmt=vf_match_csp(&vf->next,fmt_list,IMGFMT_YV12); + if(!vf->priv->outfmt) + { + uninit(vf); + return 0; // no csp match :( + } + + return 1; +} + +const vf_info_t vf_info_delogo = { + "simple logo remover", + "delogo", + "Jindrich Makovicka, Alex Beregszaszi", + "", + vf_open, +}; + +//===========================================================================// |