| /* |
| * Copyright (c) 2002 Jindrich Makovicka <makovick@gmail.com> |
| * Copyright (c) 2011 Stefano Sabatini |
| * Copyright (c) 2013, 2015 Jean Delvare <jdelvare@suse.com> |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg 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. |
| * |
| * FFmpeg 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 FFmpeg; if not, write to the Free Software Foundation, Inc., |
| * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
| */ |
| |
| /** |
| * @file |
| * A very simple tv station logo remover |
| * Originally imported from MPlayer libmpcodecs/vf_delogo.c, |
| * the algorithm was later improved. |
| */ |
| |
| #include "libavutil/common.h" |
| #include "libavutil/imgutils.h" |
| #include "libavutil/opt.h" |
| #include "libavutil/pixdesc.h" |
| #include "avfilter.h" |
| #include "formats.h" |
| #include "internal.h" |
| #include "video.h" |
| |
| /** |
| * Apply a simple delogo algorithm to the image in src and put the |
| * result in dst. |
| * |
| * The algorithm is only applied to the region specified by the logo |
| * parameters. |
| * |
| * @param w width of the input image |
| * @param h height of the input image |
| * @param logo_x x coordinate of the top left corner of the logo region |
| * @param logo_y y coordinate of the top left corner of the logo region |
| * @param logo_w width of the logo |
| * @param logo_h height of the logo |
| * @param band the size of the band around the processed area |
| * @param show show a rectangle around the processed area, useful for |
| * parameters tweaking |
| * @param direct if non-zero perform in-place processing |
| */ |
| static void apply_delogo(uint8_t *dst, int dst_linesize, |
| uint8_t *src, int src_linesize, |
| int w, int h, AVRational sar, |
| int logo_x, int logo_y, int logo_w, int logo_h, |
| unsigned int band, int show, int direct) |
| { |
| int x, y; |
| uint64_t interp, weightl, weightr, weightt, weightb, weight; |
| uint8_t *xdst, *xsrc; |
| |
| uint8_t *topleft, *botleft, *topright; |
| unsigned int left_sample, right_sample; |
| int xclipl, xclipr, yclipt, yclipb; |
| int logo_x1, logo_x2, logo_y1, logo_y2; |
| |
| xclipl = FFMAX(-logo_x, 0); |
| xclipr = FFMAX(logo_x+logo_w-w, 0); |
| yclipt = FFMAX(-logo_y, 0); |
| yclipb = FFMAX(logo_y+logo_h-h, 0); |
| |
| logo_x1 = logo_x + xclipl; |
| logo_x2 = logo_x + logo_w - xclipr - 1; |
| logo_y1 = logo_y + yclipt; |
| logo_y2 = logo_y + logo_h - yclipb - 1; |
| |
| topleft = src+logo_y1 * src_linesize+logo_x1; |
| topright = src+logo_y1 * src_linesize+logo_x2; |
| botleft = src+logo_y2 * src_linesize+logo_x1; |
| |
| if (!direct) |
| av_image_copy_plane(dst, dst_linesize, src, src_linesize, w, h); |
| |
| dst += (logo_y1 + 1) * dst_linesize; |
| src += (logo_y1 + 1) * src_linesize; |
| |
| for (y = logo_y1+1; y < logo_y2; y++) { |
| left_sample = topleft[src_linesize*(y-logo_y1)] + |
| topleft[src_linesize*(y-logo_y1-1)] + |
| topleft[src_linesize*(y-logo_y1+1)]; |
| right_sample = topright[src_linesize*(y-logo_y1)] + |
| topright[src_linesize*(y-logo_y1-1)] + |
| topright[src_linesize*(y-logo_y1+1)]; |
| |
| for (x = logo_x1+1, |
| xdst = dst+logo_x1+1, |
| xsrc = src+logo_x1+1; x < logo_x2; x++, xdst++, xsrc++) { |
| |
| if (show && (y == logo_y1+1 || y == logo_y2-1 || |
| x == logo_x1+1 || x == logo_x2-1)) { |
| *xdst = 0; |
| continue; |
| } |
| |
| /* Weighted interpolation based on relative distances, taking SAR into account */ |
| weightl = (uint64_t) (logo_x2-x) * (y-logo_y1) * (logo_y2-y) * sar.den; |
| weightr = (uint64_t)(x-logo_x1) * (y-logo_y1) * (logo_y2-y) * sar.den; |
| weightt = (uint64_t)(x-logo_x1) * (logo_x2-x) * (logo_y2-y) * sar.num; |
| weightb = (uint64_t)(x-logo_x1) * (logo_x2-x) * (y-logo_y1) * sar.num; |
| |
| interp = |
| left_sample * weightl |
| + |
| right_sample * weightr |
| + |
| (topleft[x-logo_x1] + |
| topleft[x-logo_x1-1] + |
| topleft[x-logo_x1+1]) * weightt |
| + |
| (botleft[x-logo_x1] + |
| botleft[x-logo_x1-1] + |
| botleft[x-logo_x1+1]) * weightb; |
| weight = (weightl + weightr + weightt + weightb) * 3U; |
| interp = ROUNDED_DIV(interp, weight); |
| |
| if (y >= logo_y+band && y < logo_y+logo_h-band && |
| x >= logo_x+band && x < logo_x+logo_w-band) { |
| *xdst = interp; |
| } else { |
| unsigned dist = 0; |
| |
| if (x < logo_x+band) |
| dist = FFMAX(dist, logo_x-x+band); |
| else if (x >= logo_x+logo_w-band) |
| dist = FFMAX(dist, x-(logo_x+logo_w-1-band)); |
| |
| if (y < logo_y+band) |
| dist = FFMAX(dist, logo_y-y+band); |
| else if (y >= logo_y+logo_h-band) |
| dist = FFMAX(dist, y-(logo_y+logo_h-1-band)); |
| |
| *xdst = (*xsrc*dist + interp*(band-dist))/band; |
| } |
| } |
| |
| dst += dst_linesize; |
| src += src_linesize; |
| } |
| } |
| |
| typedef struct DelogoContext { |
| const AVClass *class; |
| int x, y, w, h, band, show; |
| } DelogoContext; |
| |
| #define OFFSET(x) offsetof(DelogoContext, x) |
| #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM |
| |
| static const AVOption delogo_options[]= { |
| { "x", "set logo x position", OFFSET(x), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, FLAGS }, |
| { "y", "set logo y position", OFFSET(y), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, FLAGS }, |
| { "w", "set logo width", OFFSET(w), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, FLAGS }, |
| { "h", "set logo height", OFFSET(h), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, FLAGS }, |
| #if LIBAVFILTER_VERSION_MAJOR < 7 |
| /* Actual default value for band/t is 1, set in init */ |
| { "band", "set delogo area band size", OFFSET(band), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FLAGS }, |
| { "t", "set delogo area band size", OFFSET(band), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FLAGS }, |
| #endif |
| { "show", "show delogo area", OFFSET(show), AV_OPT_TYPE_BOOL,{ .i64 = 0 }, 0, 1, FLAGS }, |
| { NULL } |
| }; |
| |
| AVFILTER_DEFINE_CLASS(delogo); |
| |
| static int query_formats(AVFilterContext *ctx) |
| { |
| static const enum AVPixelFormat pix_fmts[] = { |
| AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P, |
| AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV440P, |
| AV_PIX_FMT_YUVA420P, AV_PIX_FMT_GRAY8, |
| AV_PIX_FMT_NONE |
| }; |
| AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts); |
| if (!fmts_list) |
| return AVERROR(ENOMEM); |
| return ff_set_common_formats(ctx, fmts_list); |
| } |
| |
| static av_cold int init(AVFilterContext *ctx) |
| { |
| DelogoContext *s = ctx->priv; |
| |
| #define CHECK_UNSET_OPT(opt) \ |
| if (s->opt == -1) { \ |
| av_log(s, AV_LOG_ERROR, "Option %s was not set.\n", #opt); \ |
| return AVERROR(EINVAL); \ |
| } |
| CHECK_UNSET_OPT(x); |
| CHECK_UNSET_OPT(y); |
| CHECK_UNSET_OPT(w); |
| CHECK_UNSET_OPT(h); |
| |
| #if LIBAVFILTER_VERSION_MAJOR < 7 |
| if (s->band == 0) { /* Unset, use default */ |
| av_log(ctx, AV_LOG_WARNING, "Note: default band value was changed from 4 to 1.\n"); |
| s->band = 1; |
| } else if (s->band != 1) { |
| av_log(ctx, AV_LOG_WARNING, "Option band is deprecated.\n"); |
| } |
| #else |
| s->band = 1; |
| #endif |
| av_log(ctx, AV_LOG_VERBOSE, "x:%d y:%d, w:%d h:%d band:%d show:%d\n", |
| s->x, s->y, s->w, s->h, s->band, s->show); |
| |
| s->w += s->band*2; |
| s->h += s->band*2; |
| s->x -= s->band; |
| s->y -= s->band; |
| |
| return 0; |
| } |
| |
| static int filter_frame(AVFilterLink *inlink, AVFrame *in) |
| { |
| DelogoContext *s = inlink->dst->priv; |
| AVFilterLink *outlink = inlink->dst->outputs[0]; |
| const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format); |
| AVFrame *out; |
| int hsub0 = desc->log2_chroma_w; |
| int vsub0 = desc->log2_chroma_h; |
| int direct = 0; |
| int plane; |
| AVRational sar; |
| |
| if (av_frame_is_writable(in)) { |
| direct = 1; |
| out = in; |
| } else { |
| out = ff_get_video_buffer(outlink, outlink->w, outlink->h); |
| if (!out) { |
| av_frame_free(&in); |
| return AVERROR(ENOMEM); |
| } |
| |
| av_frame_copy_props(out, in); |
| } |
| |
| sar = in->sample_aspect_ratio; |
| /* Assume square pixels if SAR is unknown */ |
| if (!sar.num) |
| sar.num = sar.den = 1; |
| |
| for (plane = 0; plane < desc->nb_components; plane++) { |
| int hsub = plane == 1 || plane == 2 ? hsub0 : 0; |
| int vsub = plane == 1 || plane == 2 ? vsub0 : 0; |
| |
| apply_delogo(out->data[plane], out->linesize[plane], |
| in ->data[plane], in ->linesize[plane], |
| AV_CEIL_RSHIFT(inlink->w, hsub), |
| AV_CEIL_RSHIFT(inlink->h, vsub), |
| sar, s->x>>hsub, s->y>>vsub, |
| /* Up and left borders were rounded down, inject lost bits |
| * into width and height to avoid error accumulation */ |
| AV_CEIL_RSHIFT(s->w + (s->x & ((1<<hsub)-1)), hsub), |
| AV_CEIL_RSHIFT(s->h + (s->y & ((1<<vsub)-1)), vsub), |
| s->band>>FFMIN(hsub, vsub), |
| s->show, direct); |
| } |
| |
| if (!direct) |
| av_frame_free(&in); |
| |
| return ff_filter_frame(outlink, out); |
| } |
| |
| static const AVFilterPad avfilter_vf_delogo_inputs[] = { |
| { |
| .name = "default", |
| .type = AVMEDIA_TYPE_VIDEO, |
| .filter_frame = filter_frame, |
| }, |
| { NULL } |
| }; |
| |
| static const AVFilterPad avfilter_vf_delogo_outputs[] = { |
| { |
| .name = "default", |
| .type = AVMEDIA_TYPE_VIDEO, |
| }, |
| { NULL } |
| }; |
| |
| AVFilter ff_vf_delogo = { |
| .name = "delogo", |
| .description = NULL_IF_CONFIG_SMALL("Remove logo from input video."), |
| .priv_size = sizeof(DelogoContext), |
| .priv_class = &delogo_class, |
| .init = init, |
| .query_formats = query_formats, |
| .inputs = avfilter_vf_delogo_inputs, |
| .outputs = avfilter_vf_delogo_outputs, |
| .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC, |
| }; |
