| /* |
| * Copyright (c) 2002 Jindrich Makovicka <makovick@gmail.com> |
| * Copyright (c) 2011 Stefano Sabatini |
| * |
| * 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 |
| * Ported from MPlayer libmpcodecs/vf_delogo.c. |
| */ |
| |
| #include "libavutil/imgutils.h" |
| #include "libavutil/opt.h" |
| #include "libavutil/pixdesc.h" |
| #include "avfilter.h" |
| |
| /** |
| * Apply a simple delogo algorithm to the image in dst and put the |
| * result in src. |
| * |
| * 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, |
| int logo_x, int logo_y, int logo_w, int logo_h, |
| int band, int show, int direct) |
| { |
| int x, y; |
| 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 = 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; |
| logo_y1 = logo_y + yclipt; |
| logo_y2 = logo_y + logo_h - yclipb; |
| |
| topleft = src+logo_y1 * src_linesize+logo_x1; |
| topright = src+logo_y1 * src_linesize+logo_x2-1; |
| botleft = src+(logo_y2-1) * src_linesize+logo_x1; |
| |
| dst += (logo_y1+1)*dst_linesize; |
| src += (logo_y1+1)*src_linesize; |
| |
| if (!direct) |
| av_image_copy_plane(dst, dst_linesize, src, src_linesize, w, h); |
| |
| 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[src_linesize*(y-logo_y -yclipt)] + |
| topleft[src_linesize*(y-logo_y-1-yclipt)] + |
| topleft[src_linesize*(y-logo_y+1-yclipt)]) * (logo_w-(x-logo_x))/logo_w |
| + |
| (topright[src_linesize*(y-logo_y-yclipt)] + |
| topright[src_linesize*(y-logo_y-1-yclipt)] + |
| topright[src_linesize*(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; |
| interp /= 6; |
| |
| 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 = 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; |
| if (show && (dist == band-1)) |
| *xdst = 0; |
| } |
| } |
| |
| dst += dst_linesize; |
| src += src_linesize; |
| } |
| } |
| |
| typedef struct { |
| const AVClass *class; |
| int x, y, w, h, band, show; |
| } DelogoContext; |
| |
| #define OFFSET(x) offsetof(DelogoContext, x) |
| |
| static const AVOption delogo_options[]= { |
| {"x", "set logo x position", OFFSET(x), AV_OPT_TYPE_INT, {.dbl=-1}, -1, INT_MAX }, |
| {"y", "set logo y position", OFFSET(y), AV_OPT_TYPE_INT, {.dbl=-1}, -1, INT_MAX }, |
| {"w", "set logo width", OFFSET(w), AV_OPT_TYPE_INT, {.dbl=-1}, -1, INT_MAX }, |
| {"h", "set logo height", OFFSET(h), AV_OPT_TYPE_INT, {.dbl=-1}, -1, INT_MAX }, |
| {"band", "set delogo area band size", OFFSET(band), AV_OPT_TYPE_INT, {.dbl= 4}, -1, INT_MAX }, |
| {"t", "set delogo area band size", OFFSET(band), AV_OPT_TYPE_INT, {.dbl= 4}, -1, INT_MAX }, |
| {"show", "show delogo area", OFFSET(show), AV_OPT_TYPE_INT, {.dbl= 0}, 0, 1 }, |
| {NULL}, |
| }; |
| |
| static const char *delogo_get_name(void *ctx) |
| { |
| return "delogo"; |
| } |
| |
| static const AVClass delogo_class = { |
| .class_name = "DelogoContext", |
| .item_name = delogo_get_name, |
| .option = delogo_options, |
| }; |
| |
| static int query_formats(AVFilterContext *ctx) |
| { |
| enum PixelFormat pix_fmts[] = { |
| PIX_FMT_YUV444P, PIX_FMT_YUV422P, PIX_FMT_YUV420P, |
| PIX_FMT_YUV411P, PIX_FMT_YUV410P, PIX_FMT_YUV440P, |
| PIX_FMT_YUVA420P, PIX_FMT_GRAY8, |
| PIX_FMT_NONE |
| }; |
| |
| avfilter_set_common_pixel_formats(ctx, avfilter_make_format_list(pix_fmts)); |
| return 0; |
| } |
| |
| static av_cold int init(AVFilterContext *ctx, const char *args, void *opaque) |
| { |
| DelogoContext *delogo = ctx->priv; |
| int ret = 0; |
| |
| delogo->class = &delogo_class; |
| av_opt_set_defaults(delogo); |
| |
| if (args) |
| ret = sscanf(args, "%d:%d:%d:%d:%d", |
| &delogo->x, &delogo->y, &delogo->w, &delogo->h, &delogo->band); |
| if (ret == 5) { |
| if (delogo->band < 0) |
| delogo->show = 1; |
| } else if ((ret = (av_set_options_string(delogo, args, "=", ":"))) < 0) { |
| av_log(ctx, AV_LOG_ERROR, "Error parsing options string: '%s'\n", args); |
| return ret; |
| } |
| |
| #define CHECK_UNSET_OPT(opt) \ |
| if (delogo->opt == -1) { \ |
| av_log(delogo, 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 (delogo->show) |
| delogo->band = 4; |
| |
| av_log(ctx, AV_LOG_INFO, "x:%d y:%d, w:%d h:%d band:%d show:%d\n", |
| delogo->x, delogo->y, delogo->w, delogo->h, delogo->band, delogo->show); |
| |
| delogo->w += delogo->band*2; |
| delogo->h += delogo->band*2; |
| delogo->x -= delogo->band; |
| delogo->y -= delogo->band; |
| |
| return 0; |
| } |
| |
| static void start_frame(AVFilterLink *inlink, AVFilterBufferRef *inpicref) |
| { |
| AVFilterLink *outlink = inlink->dst->outputs[0]; |
| AVFilterBufferRef *outpicref; |
| |
| if (inpicref->perms & AV_PERM_PRESERVE) { |
| outpicref = avfilter_get_video_buffer(outlink, AV_PERM_WRITE, |
| outlink->w, outlink->h); |
| avfilter_copy_buffer_ref_props(outpicref, inpicref); |
| outpicref->video->w = outlink->w; |
| outpicref->video->h = outlink->h; |
| } else |
| outpicref = inpicref; |
| |
| outlink->out_buf = outpicref; |
| avfilter_start_frame(outlink, avfilter_ref_buffer(outpicref, ~0)); |
| } |
| |
| static void null_draw_slice(AVFilterLink *link, int y, int h, int slice_dir) { } |
| |
| static void end_frame(AVFilterLink *inlink) |
| { |
| DelogoContext *delogo = inlink->dst->priv; |
| AVFilterLink *outlink = inlink->dst->outputs[0]; |
| AVFilterBufferRef *inpicref = inlink ->cur_buf; |
| AVFilterBufferRef *outpicref = outlink->out_buf; |
| int direct = inpicref == outpicref; |
| int hsub0 = av_pix_fmt_descriptors[inlink->format].log2_chroma_w; |
| int vsub0 = av_pix_fmt_descriptors[inlink->format].log2_chroma_h; |
| int plane; |
| |
| for (plane = 0; plane < 4 && inpicref->data[plane]; plane++) { |
| int hsub = plane == 1 || plane == 2 ? hsub0 : 0; |
| int vsub = plane == 1 || plane == 2 ? vsub0 : 0; |
| |
| apply_delogo(outpicref->data[plane], outpicref->linesize[plane], |
| inpicref ->data[plane], inpicref ->linesize[plane], |
| inlink->w>>hsub, inlink->h>>vsub, |
| delogo->x>>hsub, delogo->y>>vsub, |
| delogo->w>>hsub, delogo->h>>vsub, |
| delogo->band>>FFMIN(hsub, vsub), |
| delogo->show, direct); |
| } |
| |
| avfilter_draw_slice(outlink, 0, inlink->h, 1); |
| avfilter_end_frame(outlink); |
| avfilter_unref_buffer(inpicref); |
| if (!direct) |
| avfilter_unref_buffer(outpicref); |
| } |
| |
| AVFilter avfilter_vf_delogo = { |
| .name = "delogo", |
| .description = NULL_IF_CONFIG_SMALL("Remove logo from input video."), |
| .priv_size = sizeof(DelogoContext), |
| .init = init, |
| .query_formats = query_formats, |
| |
| .inputs = (const AVFilterPad[]) {{ .name = "default", |
| .type = AVMEDIA_TYPE_VIDEO, |
| .get_video_buffer = avfilter_null_get_video_buffer, |
| .start_frame = start_frame, |
| .draw_slice = null_draw_slice, |
| .end_frame = end_frame, |
| .min_perms = AV_PERM_WRITE | AV_PERM_READ, |
| .rej_perms = AV_PERM_PRESERVE }, |
| { .name = NULL}}, |
| .outputs = (const AVFilterPad[]) {{ .name = "default", |
| .type = AVMEDIA_TYPE_VIDEO, }, |
| { .name = NULL}}, |
| }; |
