mirror of https://github.com/FFmpeg/FFmpeg.git
The ported filter supports named option parsing and more YUV formats.pull/2/head
Stefano Sabatini
14 years ago
parent
0a2295815d
commit
2701f6cc6a
6 changed files with 344 additions and 1 deletions
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/*
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* Copyright (c) 2002 Jindrich Makovicka <makovick@gmail.com> |
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* Copyright (c) 2011 Stefano Sabatini |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg 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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* |
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* FFmpeg 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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* |
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* You should have received a copy of the GNU General Public License along |
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* with FFmpeg; if not, write to the Free Software Foundation, Inc., |
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
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*/ |
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/**
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* @file |
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* A very simple tv station logo remover |
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* Ported from MPlayer libmpcodecs/vf_delogo.c. |
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*/ |
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#include "libavutil/imgutils.h" |
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#include "libavutil/opt.h" |
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#include "libavutil/pixdesc.h" |
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#include "avfilter.h" |
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/**
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* Apply a simple delogo algorithm to the image in dst and put the |
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* result in src. |
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* |
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* The algorithm is only applied to the region specified by the logo |
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* parameters. |
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* |
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* @param w width of the input image |
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* @param h height of the input image |
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* @param logo_x x coordinate of the top left corner of the logo region |
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* @param logo_y y coordinate of the top left corner of the logo region |
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* @param logo_w width of the logo |
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* @param logo_h height of the logo |
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* @param band the size of the band around the processed area |
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* @param show show a rectangle around the processed area, useful for |
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* parameters tweaking |
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* @param direct if non-zero perform in-place processing |
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*/ |
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static void apply_delogo(uint8_t *dst, int dst_linesize, |
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uint8_t *src, int src_linesize, |
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int w, int h, |
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int logo_x, int logo_y, int logo_w, int logo_h, |
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int band, int show, int direct) |
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{ |
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int x, y; |
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int interp, dist; |
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uint8_t *xdst, *xsrc; |
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uint8_t *topleft, *botleft, *topright; |
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int xclipl, xclipr, yclipt, yclipb; |
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int logo_x1, logo_x2, logo_y1, logo_y2; |
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xclipl = FFMAX(-logo_x, 0); |
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xclipr = FFMAX(logo_x+logo_w-w, 0); |
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yclipt = FFMAX(-logo_y, 0); |
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yclipb = FFMAX(logo_y+logo_h-h, 0); |
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logo_x1 = logo_x + xclipl; |
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logo_x2 = logo_x + logo_w - xclipr; |
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logo_y1 = logo_y + yclipt; |
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logo_y2 = logo_y + logo_h - yclipb; |
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topleft = src+logo_y1 * src_linesize+logo_x1; |
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topright = src+logo_y1 * src_linesize+logo_x2-1; |
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botleft = src+(logo_y2-1) * src_linesize+logo_x1; |
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dst += (logo_y1+1)*dst_linesize; |
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src += (logo_y1+1)*src_linesize; |
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if (!direct) |
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av_image_copy_plane(dst, dst_linesize, src, src_linesize, w, h); |
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for (y = logo_y1+1; y < logo_y2-1; y++) { |
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for (x = logo_x1+1, |
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xdst = dst+logo_x1+1, |
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xsrc = src+logo_x1+1; x < logo_x2-1; x++, xdst++, xsrc++) { |
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interp = |
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(topleft[src_linesize*(y-logo_y -yclipt)] + |
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topleft[src_linesize*(y-logo_y-1-yclipt)] + |
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topleft[src_linesize*(y-logo_y+1-yclipt)]) * (logo_w-(x-logo_x))/logo_w |
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+ |
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(topright[src_linesize*(y-logo_y-yclipt)] + |
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topright[src_linesize*(y-logo_y-1-yclipt)] + |
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topright[src_linesize*(y-logo_y+1-yclipt)]) * (x-logo_x)/logo_w |
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+ |
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(topleft[x-logo_x-xclipl] + |
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topleft[x-logo_x-1-xclipl] + |
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topleft[x-logo_x+1-xclipl]) * (logo_h-(y-logo_y))/logo_h |
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+ |
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(botleft[x-logo_x-xclipl] + |
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botleft[x-logo_x-1-xclipl] + |
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botleft[x-logo_x+1-xclipl]) * (y-logo_y)/logo_h; |
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interp /= 6; |
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if (y >= logo_y+band && y < logo_y+logo_h-band && |
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x >= logo_x+band && x < logo_x+logo_w-band) { |
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*xdst = interp; |
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} else { |
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dist = 0; |
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if (x < logo_x+band) |
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dist = FFMAX(dist, logo_x-x+band); |
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else if (x >= logo_x+logo_w-band) |
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dist = FFMAX(dist, x-(logo_x+logo_w-1-band)); |
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if (y < logo_y+band) |
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dist = FFMAX(dist, logo_y-y+band); |
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else if (y >= logo_y+logo_h-band) |
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dist = FFMAX(dist, y-(logo_y+logo_h-1-band)); |
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*xdst = (*xsrc*dist + interp*(band-dist))/band; |
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if (show && (dist == band-1)) |
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*xdst = 0; |
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} |
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} |
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dst += dst_linesize; |
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src += src_linesize; |
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} |
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} |
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typedef struct { |
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const AVClass *class; |
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int x, y, w, h, band, show; |
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} DelogoContext; |
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#define OFFSET(x) offsetof(DelogoContext, x) |
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static const AVOption delogo_options[]= { |
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{"x", "set logo x position", OFFSET(x), FF_OPT_TYPE_INT, {.dbl=-1}, -1, INT_MAX }, |
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{"y", "set logo y position", OFFSET(y), FF_OPT_TYPE_INT, {.dbl=-1}, -1, INT_MAX }, |
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{"w", "set logo width", OFFSET(w), FF_OPT_TYPE_INT, {.dbl=-1}, -1, INT_MAX }, |
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{"h", "set logo height", OFFSET(h), FF_OPT_TYPE_INT, {.dbl=-1}, -1, INT_MAX }, |
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{"band", "set delogo area band size", OFFSET(band), FF_OPT_TYPE_INT, {.dbl= 4}, -1, INT_MAX }, |
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{"t", "set delogo area band size", OFFSET(band), FF_OPT_TYPE_INT, {.dbl= 4}, -1, INT_MAX }, |
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{"show", "show delogo area", OFFSET(show), FF_OPT_TYPE_INT, {.dbl= 0}, 0, 1 }, |
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{NULL}, |
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}; |
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static const char *delogo_get_name(void *ctx) |
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{ |
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return "delogo"; |
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} |
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static const AVClass delogo_class = { |
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"DelogoContext", |
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delogo_get_name, |
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delogo_options |
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}; |
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static int query_formats(AVFilterContext *ctx) |
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{ |
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enum PixelFormat pix_fmts[] = { |
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PIX_FMT_YUV444P, PIX_FMT_YUV422P, PIX_FMT_YUV420P, |
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PIX_FMT_YUV411P, PIX_FMT_YUV410P, PIX_FMT_YUV440P, |
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PIX_FMT_YUVA420P, PIX_FMT_GRAY8, |
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PIX_FMT_NONE |
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}; |
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avfilter_set_common_pixel_formats(ctx, avfilter_make_format_list(pix_fmts)); |
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return 0; |
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} |
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static av_cold int init(AVFilterContext *ctx, const char *args, void *opaque) |
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{ |
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DelogoContext *delogo = ctx->priv; |
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int ret = 0; |
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delogo->class = &delogo_class; |
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av_opt_set_defaults2(delogo, 0, 0); |
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if (args) |
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ret = sscanf(args, "%d:%d:%d:%d:%d", |
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&delogo->x, &delogo->y, &delogo->w, &delogo->h, &delogo->band); |
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if (ret == 5) { |
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if (delogo->band < 0) |
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delogo->show = 1; |
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} else if ((ret = (av_set_options_string(delogo, args, "=", ":"))) < 0) { |
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av_log(ctx, AV_LOG_ERROR, "Error parsing options string: '%s'\n", args); |
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return ret; |
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} |
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#define CHECK_UNSET_OPT(opt) \ |
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if (delogo->opt == -1) { \
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av_log(delogo, AV_LOG_ERROR, "Option %s was not set.\n", #opt); \
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return AVERROR(EINVAL); \
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} |
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CHECK_UNSET_OPT(x); |
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CHECK_UNSET_OPT(y); |
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CHECK_UNSET_OPT(w); |
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CHECK_UNSET_OPT(h); |
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if (delogo->show) |
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delogo->band = 4; |
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av_log(ctx, AV_LOG_INFO, "x:%d y:%d, w:%d h:%d band:%d show:%d\n", |
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delogo->x, delogo->y, delogo->w, delogo->h, delogo->band, delogo->show); |
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delogo->w += delogo->band*2; |
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delogo->h += delogo->band*2; |
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delogo->x -= delogo->band; |
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delogo->y -= delogo->band; |
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return 0; |
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} |
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static void start_frame(AVFilterLink *inlink, AVFilterBufferRef *inpicref) |
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{ |
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AVFilterLink *outlink = inlink->dst->outputs[0]; |
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AVFilterBufferRef *outpicref; |
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if (inpicref->perms & AV_PERM_PRESERVE) { |
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outpicref = avfilter_get_video_buffer(outlink, AV_PERM_WRITE, |
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outlink->w, outlink->h); |
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avfilter_copy_buffer_ref_props(outpicref, inpicref); |
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outpicref->video->w = outlink->w; |
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outpicref->video->h = outlink->h; |
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} else |
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outpicref = inpicref; |
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outlink->out_buf = outpicref; |
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avfilter_start_frame(outlink, avfilter_ref_buffer(outpicref, ~0)); |
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} |
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static void null_draw_slice(AVFilterLink *link, int y, int h, int slice_dir) { } |
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static void end_frame(AVFilterLink *inlink) |
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{ |
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DelogoContext *delogo = inlink->dst->priv; |
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AVFilterLink *outlink = inlink->dst->outputs[0]; |
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AVFilterBufferRef *inpicref = inlink ->cur_buf; |
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AVFilterBufferRef *outpicref = outlink->out_buf; |
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int direct = inpicref == outpicref; |
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int hsub0 = av_pix_fmt_descriptors[inlink->format].log2_chroma_w; |
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int vsub0 = av_pix_fmt_descriptors[inlink->format].log2_chroma_h; |
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int plane; |
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for (plane = 0; plane < 4 && inpicref->data[plane]; plane++) { |
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int hsub = plane == 1 || plane == 2 ? hsub0 : 0; |
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int vsub = plane == 1 || plane == 2 ? vsub0 : 0; |
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apply_delogo(outpicref->data[plane], outpicref->linesize[plane], |
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inpicref ->data[plane], inpicref ->linesize[plane], |
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inlink->w>>hsub, inlink->h>>vsub, |
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delogo->x>>hsub, delogo->y>>vsub, |
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delogo->w>>hsub, delogo->h>>vsub, |
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delogo->band>>FFMIN(hsub, vsub), |
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delogo->show, direct); |
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} |
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avfilter_draw_slice(outlink, 0, inlink->h, 1); |
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avfilter_end_frame(outlink); |
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avfilter_unref_buffer(inpicref); |
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if (!direct) |
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avfilter_unref_buffer(outpicref); |
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} |
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AVFilter avfilter_vf_delogo = { |
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.name = "delogo", |
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.description = NULL_IF_CONFIG_SMALL("Remove logo from input video."), |
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.priv_size = sizeof(DelogoContext), |
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.init = init, |
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.query_formats = query_formats, |
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.inputs = (AVFilterPad[]) {{ .name = "default", |
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.type = AVMEDIA_TYPE_VIDEO, |
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.get_video_buffer = avfilter_null_get_video_buffer, |
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.start_frame = start_frame, |
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.draw_slice = null_draw_slice, |
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.end_frame = end_frame, |
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.min_perms = AV_PERM_WRITE | AV_PERM_READ, |
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.rej_perms = AV_PERM_PRESERVE }, |
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{ .name = NULL}}, |
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.outputs = (AVFilterPad[]) {{ .name = "default", |
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.type = AVMEDIA_TYPE_VIDEO, }, |
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{ .name = NULL}}, |
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}; |
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