yading@10: /* yading@10: * Copyright (c) 2002 Jindrich Makovicka yading@10: * Copyright (c) 2011 Stefano Sabatini yading@10: * yading@10: * This file is part of FFmpeg. yading@10: * yading@10: * FFmpeg is free software; you can redistribute it and/or modify yading@10: * it under the terms of the GNU General Public License as published by yading@10: * the Free Software Foundation; either version 2 of the License, or yading@10: * (at your option) any later version. yading@10: * yading@10: * FFmpeg is distributed in the hope that it will be useful, yading@10: * but WITHOUT ANY WARRANTY; without even the implied warranty of yading@10: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the yading@10: * GNU General Public License for more details. yading@10: * yading@10: * You should have received a copy of the GNU General Public License along yading@10: * with FFmpeg; if not, write to the Free Software Foundation, Inc., yading@10: * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. yading@10: */ yading@10: yading@10: /** yading@10: * @file yading@10: * A very simple tv station logo remover yading@10: * Ported from MPlayer libmpcodecs/vf_delogo.c. yading@10: */ yading@10: yading@10: #include "libavutil/common.h" yading@10: #include "libavutil/imgutils.h" yading@10: #include "libavutil/opt.h" yading@10: #include "libavutil/pixdesc.h" yading@10: #include "avfilter.h" yading@10: #include "formats.h" yading@10: #include "internal.h" yading@10: #include "video.h" yading@10: yading@10: /** yading@10: * Apply a simple delogo algorithm to the image in dst and put the yading@10: * result in src. yading@10: * yading@10: * The algorithm is only applied to the region specified by the logo yading@10: * parameters. yading@10: * yading@10: * @param w width of the input image yading@10: * @param h height of the input image yading@10: * @param logo_x x coordinate of the top left corner of the logo region yading@10: * @param logo_y y coordinate of the top left corner of the logo region yading@10: * @param logo_w width of the logo yading@10: * @param logo_h height of the logo yading@10: * @param band the size of the band around the processed area yading@10: * @param show show a rectangle around the processed area, useful for yading@10: * parameters tweaking yading@10: * @param direct if non-zero perform in-place processing yading@10: */ yading@10: static void apply_delogo(uint8_t *dst, int dst_linesize, yading@10: uint8_t *src, int src_linesize, yading@10: int w, int h, yading@10: int logo_x, int logo_y, int logo_w, int logo_h, yading@10: int band, int show, int direct) yading@10: { yading@10: int x, y; yading@10: int interp, dist; yading@10: uint8_t *xdst, *xsrc; yading@10: yading@10: uint8_t *topleft, *botleft, *topright; yading@10: int xclipl, xclipr, yclipt, yclipb; yading@10: int logo_x1, logo_x2, logo_y1, logo_y2; yading@10: yading@10: xclipl = FFMAX(-logo_x, 0); yading@10: xclipr = FFMAX(logo_x+logo_w-w, 0); yading@10: yclipt = FFMAX(-logo_y, 0); yading@10: yclipb = FFMAX(logo_y+logo_h-h, 0); yading@10: yading@10: logo_x1 = logo_x + xclipl; yading@10: logo_x2 = logo_x + logo_w - xclipr; yading@10: logo_y1 = logo_y + yclipt; yading@10: logo_y2 = logo_y + logo_h - yclipb; yading@10: yading@10: topleft = src+logo_y1 * src_linesize+logo_x1; yading@10: topright = src+logo_y1 * src_linesize+logo_x2-1; yading@10: botleft = src+(logo_y2-1) * src_linesize+logo_x1; yading@10: yading@10: if (!direct) yading@10: av_image_copy_plane(dst, dst_linesize, src, src_linesize, w, h); yading@10: yading@10: dst += (logo_y1 + 1) * dst_linesize; yading@10: src += (logo_y1 + 1) * src_linesize; yading@10: yading@10: for (y = logo_y1+1; y < logo_y2-1; y++) { yading@10: for (x = logo_x1+1, yading@10: xdst = dst+logo_x1+1, yading@10: xsrc = src+logo_x1+1; x < logo_x2-1; x++, xdst++, xsrc++) { yading@10: interp = yading@10: (topleft[src_linesize*(y-logo_y -yclipt)] + yading@10: topleft[src_linesize*(y-logo_y-1-yclipt)] + yading@10: topleft[src_linesize*(y-logo_y+1-yclipt)]) * (logo_w-(x-logo_x))/logo_w yading@10: + yading@10: (topright[src_linesize*(y-logo_y-yclipt)] + yading@10: topright[src_linesize*(y-logo_y-1-yclipt)] + yading@10: topright[src_linesize*(y-logo_y+1-yclipt)]) * (x-logo_x)/logo_w yading@10: + yading@10: (topleft[x-logo_x-xclipl] + yading@10: topleft[x-logo_x-1-xclipl] + yading@10: topleft[x-logo_x+1-xclipl]) * (logo_h-(y-logo_y))/logo_h yading@10: + yading@10: (botleft[x-logo_x-xclipl] + yading@10: botleft[x-logo_x-1-xclipl] + yading@10: botleft[x-logo_x+1-xclipl]) * (y-logo_y)/logo_h; yading@10: interp /= 6; yading@10: yading@10: if (y >= logo_y+band && y < logo_y+logo_h-band && yading@10: x >= logo_x+band && x < logo_x+logo_w-band) { yading@10: *xdst = interp; yading@10: } else { yading@10: dist = 0; yading@10: if (x < logo_x+band) yading@10: dist = FFMAX(dist, logo_x-x+band); yading@10: else if (x >= logo_x+logo_w-band) yading@10: dist = FFMAX(dist, x-(logo_x+logo_w-1-band)); yading@10: yading@10: if (y < logo_y+band) yading@10: dist = FFMAX(dist, logo_y-y+band); yading@10: else if (y >= logo_y+logo_h-band) yading@10: dist = FFMAX(dist, y-(logo_y+logo_h-1-band)); yading@10: yading@10: *xdst = (*xsrc*dist + interp*(band-dist))/band; yading@10: if (show && (dist == band-1)) yading@10: *xdst = 0; yading@10: } yading@10: } yading@10: yading@10: dst += dst_linesize; yading@10: src += src_linesize; yading@10: } yading@10: } yading@10: yading@10: typedef struct { yading@10: const AVClass *class; yading@10: int x, y, w, h, band, show; yading@10: } DelogoContext; yading@10: yading@10: #define OFFSET(x) offsetof(DelogoContext, x) yading@10: #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM yading@10: yading@10: static const AVOption delogo_options[]= { yading@10: { "x", "set logo x position", OFFSET(x), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, FLAGS }, yading@10: { "y", "set logo y position", OFFSET(y), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, FLAGS }, yading@10: { "w", "set logo width", OFFSET(w), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, FLAGS }, yading@10: { "h", "set logo height", OFFSET(h), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, FLAGS }, yading@10: { "band", "set delogo area band size", OFFSET(band), AV_OPT_TYPE_INT, { .i64 = 4 }, -1, INT_MAX, FLAGS }, yading@10: { "t", "set delogo area band size", OFFSET(band), AV_OPT_TYPE_INT, { .i64 = 4 }, -1, INT_MAX, FLAGS }, yading@10: { "show", "show delogo area", OFFSET(show), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, FLAGS }, yading@10: { NULL }, yading@10: }; yading@10: yading@10: AVFILTER_DEFINE_CLASS(delogo); yading@10: yading@10: static int query_formats(AVFilterContext *ctx) yading@10: { yading@10: static const enum AVPixelFormat pix_fmts[] = { yading@10: AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P, yading@10: AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV440P, yading@10: AV_PIX_FMT_YUVA420P, AV_PIX_FMT_GRAY8, yading@10: AV_PIX_FMT_NONE yading@10: }; yading@10: yading@10: ff_set_common_formats(ctx, ff_make_format_list(pix_fmts)); yading@10: return 0; yading@10: } yading@10: yading@10: static av_cold int init(AVFilterContext *ctx) yading@10: { yading@10: DelogoContext *delogo = ctx->priv; yading@10: yading@10: #define CHECK_UNSET_OPT(opt) \ yading@10: if (delogo->opt == -1) { \ yading@10: av_log(delogo, AV_LOG_ERROR, "Option %s was not set.\n", #opt); \ yading@10: return AVERROR(EINVAL); \ yading@10: } yading@10: CHECK_UNSET_OPT(x); yading@10: CHECK_UNSET_OPT(y); yading@10: CHECK_UNSET_OPT(w); yading@10: CHECK_UNSET_OPT(h); yading@10: yading@10: if (delogo->band < 0 || delogo->show) { yading@10: delogo->show = 1; yading@10: delogo->band = 4; yading@10: } yading@10: yading@10: av_log(ctx, AV_LOG_VERBOSE, "x:%d y:%d, w:%d h:%d band:%d show:%d\n", yading@10: delogo->x, delogo->y, delogo->w, delogo->h, delogo->band, delogo->show); yading@10: yading@10: delogo->w += delogo->band*2; yading@10: delogo->h += delogo->band*2; yading@10: delogo->x -= delogo->band; yading@10: delogo->y -= delogo->band; yading@10: yading@10: return 0; yading@10: } yading@10: yading@10: static int filter_frame(AVFilterLink *inlink, AVFrame *in) yading@10: { yading@10: DelogoContext *delogo = inlink->dst->priv; yading@10: AVFilterLink *outlink = inlink->dst->outputs[0]; yading@10: const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format); yading@10: AVFrame *out; yading@10: int hsub0 = desc->log2_chroma_w; yading@10: int vsub0 = desc->log2_chroma_h; yading@10: int direct = 0; yading@10: int plane; yading@10: yading@10: if (av_frame_is_writable(in)) { yading@10: direct = 1; yading@10: out = in; yading@10: } else { yading@10: out = ff_get_video_buffer(outlink, outlink->w, outlink->h); yading@10: if (!out) { yading@10: av_frame_free(&in); yading@10: return AVERROR(ENOMEM); yading@10: } yading@10: yading@10: av_frame_copy_props(out, in); yading@10: } yading@10: yading@10: for (plane = 0; plane < 4 && in->data[plane]; plane++) { yading@10: int hsub = plane == 1 || plane == 2 ? hsub0 : 0; yading@10: int vsub = plane == 1 || plane == 2 ? vsub0 : 0; yading@10: yading@10: apply_delogo(out->data[plane], out->linesize[plane], yading@10: in ->data[plane], in ->linesize[plane], yading@10: inlink->w>>hsub, inlink->h>>vsub, yading@10: delogo->x>>hsub, delogo->y>>vsub, yading@10: delogo->w>>hsub, delogo->h>>vsub, yading@10: delogo->band>>FFMIN(hsub, vsub), yading@10: delogo->show, direct); yading@10: } yading@10: yading@10: if (!direct) yading@10: av_frame_free(&in); yading@10: yading@10: return ff_filter_frame(outlink, out); yading@10: } yading@10: yading@10: static const AVFilterPad avfilter_vf_delogo_inputs[] = { yading@10: { yading@10: .name = "default", yading@10: .type = AVMEDIA_TYPE_VIDEO, yading@10: .get_video_buffer = ff_null_get_video_buffer, yading@10: .filter_frame = filter_frame, yading@10: }, yading@10: { NULL } yading@10: }; yading@10: yading@10: static const AVFilterPad avfilter_vf_delogo_outputs[] = { yading@10: { yading@10: .name = "default", yading@10: .type = AVMEDIA_TYPE_VIDEO, yading@10: }, yading@10: { NULL } yading@10: }; yading@10: yading@10: AVFilter avfilter_vf_delogo = { yading@10: .name = "delogo", yading@10: .description = NULL_IF_CONFIG_SMALL("Remove logo from input video."), yading@10: .priv_size = sizeof(DelogoContext), yading@10: .priv_class = &delogo_class, yading@10: .init = init, yading@10: .query_formats = query_formats, yading@10: yading@10: .inputs = avfilter_vf_delogo_inputs, yading@10: .outputs = avfilter_vf_delogo_outputs, yading@10: };