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author | Stefano Sabatini <stefano.sabatini-lala@poste.it> | 2011-08-10 18:58:49 +0200 |
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committer | Anton Khirnov <anton@khirnov.net> | 2011-10-17 18:05:41 +0200 |
commit | b157be1f383e55f86324dae11e90a7b59173eec1 (patch) | |
tree | 591d3211b0e35615fcac514b826ff5eb782fe371 /libavfilter/vf_delogo.c | |
parent | ce6b6ef645f6ac17f78e937837fe8f37a1b2beaf (diff) | |
download | ffmpeg-b157be1f383e55f86324dae11e90a7b59173eec1.tar.gz |
lavfi: port libmpcodecs delogo filter
The ported filter supports named option parsing and more YUV formats.
Signed-off-by: Anton Khirnov <anton@khirnov.net>
Diffstat (limited to 'libavfilter/vf_delogo.c')
-rw-r--r-- | libavfilter/vf_delogo.c | 284 |
1 files changed, 284 insertions, 0 deletions
diff --git a/libavfilter/vf_delogo.c b/libavfilter/vf_delogo.c new file mode 100644 index 0000000000..ca3156814b --- /dev/null +++ b/libavfilter/vf_delogo.c @@ -0,0 +1,284 @@ +/* + * Copyright (c) 2002 Jindrich Makovicka <makovick@gmail.com> + * Copyright (c) 2011 Stefano Sabatini + * + * This file is part of Libav. + * + * Libav 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. + * + * Libav 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 Libav; 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), FF_OPT_TYPE_INT, {-1}, -1, INT_MAX }, + {"y", "set logo y position", OFFSET(y), FF_OPT_TYPE_INT, {-1}, -1, INT_MAX }, + {"w", "set logo width", OFFSET(w), FF_OPT_TYPE_INT, {-1}, -1, INT_MAX }, + {"h", "set logo height", OFFSET(h), FF_OPT_TYPE_INT, {-1}, -1, INT_MAX }, + {"band", "set delogo area band size", OFFSET(band), FF_OPT_TYPE_INT, { 4}, -1, INT_MAX }, + {"t", "set delogo area band size", OFFSET(band), FF_OPT_TYPE_INT, { 4}, -1, INT_MAX }, + {"show", "show delogo area", OFFSET(show), FF_OPT_TYPE_INT, { 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_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_DEBUG, "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 = (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 = (AVFilterPad[]) {{ .name = "default", + .type = AVMEDIA_TYPE_VIDEO, }, + { .name = NULL}}, +}; |