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-rwxr-xr-xconfigure1
-rw-r--r--doc/filters.texi52
-rw-r--r--libavfilter/Makefile1
-rw-r--r--libavfilter/allfilters.c1
-rw-r--r--libavfilter/avfilter.h2
-rw-r--r--libavfilter/vf_delogo.c284
6 files changed, 340 insertions, 1 deletions
diff --git a/configure b/configure
index 720b625237..a036873682 100755
--- a/configure
+++ b/configure
@@ -1482,6 +1482,7 @@ udp_protocol_deps="network"
blackframe_filter_deps="gpl"
boxblur_filter_deps="gpl"
cropdetect_filter_deps="gpl"
+delogo_filter_deps="gpl"
drawtext_filter_deps="libfreetype"
frei0r_filter_deps="frei0r dlopen strtok_r"
frei0r_src_filter_deps="frei0r dlopen strtok_r"
diff --git a/doc/filters.texi b/doc/filters.texi
index f3f77183ca..56f00ff4e1 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -381,6 +381,58 @@ indicates never reset and return the largest area encountered during
playback.
@end table
+@section delogo
+
+Suppress a TV station logo by a simple interpolation of the surrounding
+pixels. Just set a rectangle covering the logo and watch it disappear
+(and sometimes something even uglier appear - your mileage may vary).
+
+The filter accepts parameters as a string of the form
+"@var{x}:@var{y}:@var{w}:@var{h}:@var{band}", or as a list of
+@var{key}=@var{value} pairs, separated by ":".
+
+The description of the accepted parameters follows.
+
+@table @option
+
+@item x, y
+Specify the top left corner coordinates of the logo. They must be
+specified.
+
+@item w, h
+Specify the width and height of the logo to clear. They must be
+specified.
+
+@item band, t
+Specify the thickness of the fuzzy edge of the rectangle (added to
+@var{w} and @var{h}). The default value is 4.
+
+@item show
+When set to 1, a green rectangle is drawn on the screen to simplify
+finding the right @var{x}, @var{y}, @var{w}, @var{h} parameters, and
+@var{band} is set to 4. The default value is 0.
+
+@end table
+
+Some examples follow.
+
+@itemize
+
+@item
+Set a rectangle covering the area with top left corner coordinates 0,0
+and size 100x77, setting a band of size 10:
+@example
+delogo=0:0:100:77:10
+@end example
+
+@item
+As the previous example, but use named options:
+@example
+delogo=x=0:y=0:w=100:h=77:band=10
+@end example
+
+@end itemize
+
@section drawbox
Draw a colored box on the input image.
diff --git a/libavfilter/Makefile b/libavfilter/Makefile
index 44f2ab94d4..c5f146e949 100644
--- a/libavfilter/Makefile
+++ b/libavfilter/Makefile
@@ -24,6 +24,7 @@ OBJS-$(CONFIG_BOXBLUR_FILTER) += vf_boxblur.o
OBJS-$(CONFIG_COPY_FILTER) += vf_copy.o
OBJS-$(CONFIG_CROP_FILTER) += vf_crop.o
OBJS-$(CONFIG_CROPDETECT_FILTER) += vf_cropdetect.o
+OBJS-$(CONFIG_DELOGO_FILTER) += vf_delogo.o
OBJS-$(CONFIG_DRAWBOX_FILTER) += vf_drawbox.o
OBJS-$(CONFIG_DRAWTEXT_FILTER) += vf_drawtext.o
OBJS-$(CONFIG_FADE_FILTER) += vf_fade.o
diff --git a/libavfilter/allfilters.c b/libavfilter/allfilters.c
index f9746cd53e..f6c60a1eea 100644
--- a/libavfilter/allfilters.c
+++ b/libavfilter/allfilters.c
@@ -45,6 +45,7 @@ void avfilter_register_all(void)
REGISTER_FILTER (COPY, copy, vf);
REGISTER_FILTER (CROP, crop, vf);
REGISTER_FILTER (CROPDETECT, cropdetect, vf);
+ REGISTER_FILTER (DELOGO, delogo, vf);
REGISTER_FILTER (DRAWBOX, drawbox, vf);
REGISTER_FILTER (DRAWTEXT, drawtext, vf);
REGISTER_FILTER (FADE, fade, vf);
diff --git a/libavfilter/avfilter.h b/libavfilter/avfilter.h
index 4ed8ed9f1d..72b5dfa12b 100644
--- a/libavfilter/avfilter.h
+++ b/libavfilter/avfilter.h
@@ -29,7 +29,7 @@
#include "libavutil/rational.h"
#define LIBAVFILTER_VERSION_MAJOR 2
-#define LIBAVFILTER_VERSION_MINOR 10
+#define LIBAVFILTER_VERSION_MINOR 11
#define LIBAVFILTER_VERSION_MICRO 0
#define LIBAVFILTER_VERSION_INT AV_VERSION_INT(LIBAVFILTER_VERSION_MAJOR, \
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}},
+};
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-08 22:24:07 +0000