[FFmpeg-devel] [PATCH] avfilter: add signalstats filter
Clément Bœsch
u at pkh.me
Mon Jun 2 23:50:27 CEST 2014
Signed-off-by: Mark Heath <mjpeg0 at silicontrip.net>
Signed-off-by: Dave Rice <dericed at yahoo.com>
Signed-off-by: Clément Bœsch <u at pkh.me>
---
TODO: bump lavfi minor
---
Changelog | 1 +
doc/filters.texi | 168 +++++++++++++++
libavfilter/Makefile | 1 +
libavfilter/allfilters.c | 1 +
libavfilter/vf_signalstats.c | 479 +++++++++++++++++++++++++++++++++++++++++++
5 files changed, 650 insertions(+)
create mode 100644 libavfilter/vf_signalstats.c
diff --git a/Changelog b/Changelog
index 3d416c4..9c366ff 100644
--- a/Changelog
+++ b/Changelog
@@ -26,6 +26,7 @@ version <next>:
- native Opus decoder
- display matrix export and rotation api
- WebVTT encoder
+- signalstats filter
version 2.2:
diff --git a/doc/filters.texi b/doc/filters.texi
index e004c44..d30827a 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -7532,6 +7532,174 @@ Swap the second and third planes of the input:
ffmpeg -i INPUT -vf shuffleplanes=0:2:1:3 OUTPUT
@end example
+ at section signalstats
+Evaluate various visual metrics that assist in determining issues associated
+with the digitization of analog video media.
+
+By default the filter will log these metadata values:
+
+ at table @option
+ at item YMIN
+Display the minimal Y value contained within the input frame. Expressed in
+range of [0-255].
+
+ at item YLOW
+Display the Y value at the 10% percentile within the input frame. Expressed in
+range of [0-255].
+
+ at item YAVG
+Display the average Y value within the input frame. Expressed in range of
+[0-255].
+
+ at item YHIGH
+Display the Y value at the 90% percentile within the input frame. Expressed in
+range of [0-255].
+
+ at item YMAX
+Display the maximum Y value contained within the input frame. Expressed in
+range of [0-255].
+
+ at item UMIN
+Display the minimal U value contained within the input frame. Expressed in
+range of [0-255].
+
+ at item ULOW
+Display the U value at the 10% percentile within the input frame. Expressed in
+range of [0-255].
+
+ at item UAVG
+Display the average U value within the input frame. Expressed in range of
+[0-255].
+
+ at item UHIGH
+Display the U value at the 90% percentile within the input frame. Expressed in
+range of [0-255].
+
+ at item UMAX
+Display the maximum U value contained within the input frame. Expressed in
+range of [0-255].
+
+ at item VMIN
+Display the minimal V value contained within the input frame. Expressed in
+range of [0-255].
+
+ at item VLOW
+Display the V value at the 10% percentile within the input frame. Expressed in
+range of [0-255].
+
+ at item VAVG
+Display the average V value within the input frame. Expressed in range of
+[0-255].
+
+ at item VHIGH
+Display the V value at the 90% percentile within the input frame. Expressed in
+range of [0-255].
+
+ at item VMAX
+Display the maximum V value contained within the input frame. Expressed in
+range of [0-255].
+
+ at item SATMIN
+Display the minimal saturation value contained within the input frame.
+Expressed in range of [0-~181.02].
+
+ at item SATLOW
+Display the saturation value at the 10% percentile within the input frame.
+Expressed in range of [0-~181.02].
+
+ at item SATAVG
+Display the average saturation value within the input frame. Expressed in range
+of [0-~181.02].
+
+ at item SATHIGH
+Display the saturation value at the 90% percentile within the input frame.
+Expressed in range of [0-~181.02].
+
+ at item SATMAX
+Display the maximum saturation value contained within the input frame.
+Expressed in range of [0-~181.02].
+
+ at item HUEMED
+Display the median value for hue within the input frame. Expressed in range of
+[0-360].
+
+ at item HUEAVG
+Display the average value for hue within the input frame. Expressed in range of
+[0-360].
+
+ at item YDIF
+Display a quantification of the visual change on the Y plane between the input
+frame and the previous input frame.
+
+ at item UDIF
+Display a quantification of the visual change on the U plane between the input
+frame and the previous input frame.
+
+ at item VDIF
+Display a quantification of the visual change on the V plane between the input
+frame and the previous input frame.
+ at end table
+
+The filter accepts the following options:
+
+ at table @option
+ at item stat
+Specify an additional form of image analysis. It accepts the following values:
+
+ at table @samp
+ at item tout
+Identify @var{temporal outliers} pixels. A @var{temporal outlier} is a pixel
+unlike the neighboring pixels of the same field. Examples of temporal outliers
+include the results of video dropouts, head clogs, or tape tracking issues.
+
+ at item vrep
+Identify @var{vertical line repetition}. Vertical line repetition includes
+similar rows of pixels within a frame. In born-digital video vertical line
+repetition is common, but this pattern is uncommon in video digitized from an
+analog source. When it occurs in video that results from the digitization of an
+analog source it can indicate concealment from a dropout compensator.
+
+ at item brng
+Identify pixels that fall outside of legal broadcast range.
+ at end table
+
+ at item out
+Output video with the specified type of pixel highlighted. It accepts the
+following values:
+
+ at table @samp
+ at item tout
+ at item vrep
+ at item brng
+ at end table
+
+ at item color, c
+Set the highlight color for the @option{out} option. The default color is
+yellow.
+ at end table
+
+ at subsection Examples
+
+ at itemize
+ at item
+Output data of various video metrics:
+ at example
+ffprobe -f lavfi movie=example.mov,signalstats="stat=tout+vrep+rang" -show_frames
+ at end example
+
+ at item
+Output specific data about the minimum and maximum values of the Y plane per frame:
+ at example
+ffprobe -f lavfi movie=example.mov,signalstats -show_entries frame_tags=lavfi.values.YMAX,lavfi.values.YMIN
+ at end example
+
+ at item
+Playback video while highlighting pixels that are outside of broadcast range in red.
+ at example
+ffplay example.mov -vf values="out=brng:color=red"
+ at end example
+ at end itemize
+
@anchor{smartblur}
@section smartblur
diff --git a/libavfilter/Makefile b/libavfilter/Makefile
index f981dfa..142c06e 100644
--- a/libavfilter/Makefile
+++ b/libavfilter/Makefile
@@ -174,6 +174,7 @@ OBJS-$(CONFIG_SETSAR_FILTER) += vf_aspect.o
OBJS-$(CONFIG_SETTB_FILTER) += settb.o
OBJS-$(CONFIG_SHOWINFO_FILTER) += vf_showinfo.o
OBJS-$(CONFIG_SHUFFLEPLANES_FILTER) += vf_shuffleplanes.o
+OBJS-$(CONFIG_SIGNALSTATS_FILTER) += vf_signalstats.o
OBJS-$(CONFIG_SMARTBLUR_FILTER) += vf_smartblur.o
OBJS-$(CONFIG_SPLIT_FILTER) += split.o
OBJS-$(CONFIG_SPP_FILTER) += vf_spp.o
diff --git a/libavfilter/allfilters.c b/libavfilter/allfilters.c
index 22d643d..4b9db9e 100644
--- a/libavfilter/allfilters.c
+++ b/libavfilter/allfilters.c
@@ -191,6 +191,7 @@ void avfilter_register_all(void)
REGISTER_FILTER(SETTB, settb, vf);
REGISTER_FILTER(SHOWINFO, showinfo, vf);
REGISTER_FILTER(SHUFFLEPLANES, shuffleplanes, vf);
+ REGISTER_FILTER(SIGNALSTATS, signalstats, vf);
REGISTER_FILTER(SMARTBLUR, smartblur, vf);
REGISTER_FILTER(SPLIT, split, vf);
REGISTER_FILTER(SPP, spp, vf);
diff --git a/libavfilter/vf_signalstats.c b/libavfilter/vf_signalstats.c
new file mode 100644
index 0000000..e06bfe1
--- /dev/null
+++ b/libavfilter/vf_signalstats.c
@@ -0,0 +1,479 @@
+/*
+ * Copyright (c) 2010 Mark Heath mjpeg0 @ silicontrip dot org
+ * Copyright (c) 2014 Clément Bœsch
+ * Copyright (c) 2014 Dave Rice @dericed
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser 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
+ */
+
+#include "libavutil/opt.h"
+#include "libavutil/pixdesc.h"
+#include "libavcodec/mathops.h"
+#include "internal.h"
+
+enum FilterMode {
+ FILTER_NONE = -1,
+ FILTER_TOUT,
+ FILTER_VREP,
+ FILTER_BRNG,
+ FILT_NUMB
+};
+
+typedef struct {
+ const AVClass *class;
+ int chromah;
+ int chromaw;
+ int hsub;
+ int vsub;
+ int fs;
+ int cfs;
+ enum FilterMode outfilter;
+ int filters;
+ AVFrame *frame_prev;
+ char *vrep_line;
+ uint8_t rgba_color[4];
+ int yuv_color[3];
+} SignalstatsContext;
+
+#define OFFSET(x) offsetof(SignalstatsContext, x)
+#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
+
+static const AVOption signalstats_options[] = {
+ {"stat", "set statistics filters", OFFSET(filters), AV_OPT_TYPE_FLAGS, {.i64=0}, 0, INT_MAX, FLAGS, "filters"},
+ {"tout", "analyze pixels for temporal outliers", 0, AV_OPT_TYPE_CONST, {.i64=1<<FILTER_TOUT}, 0, 0, FLAGS, "filters"},
+ {"vrep", "analyze video lines for vertical line repitition", 0, AV_OPT_TYPE_CONST, {.i64=1<<FILTER_VREP}, 0, 0, FLAGS, "filters"},
+ {"brng", "analyze for pixels outside of broadcast range", 0, AV_OPT_TYPE_CONST, {.i64=1<<FILTER_BRNG}, 0, 0, FLAGS, "filters"},
+ {"out", "set video filter", OFFSET(outfilter), AV_OPT_TYPE_INT, {.i64=FILTER_NONE}, -1, FILT_NUMB-1, FLAGS, "out"},
+ {"tout", "highlight pixels that depict temporal outliers", 0, AV_OPT_TYPE_CONST, {.i64=FILTER_TOUT}, 0, 0, FLAGS, "out"},
+ {"vrep", "highlight video lines that depict vertical line repitition", 0, AV_OPT_TYPE_CONST, {.i64=FILTER_VREP}, 0, 0, FLAGS, "out"},
+ {"brng", "highlight pixels that are outside of broadcast range", 0, AV_OPT_TYPE_CONST, {.i64=FILTER_BRNG}, 0, 0, FLAGS, "out"},
+ {"c", "set highlight color", OFFSET(rgba_color), AV_OPT_TYPE_COLOR, {.str="yellow"}, .flags=FLAGS},
+ {"color", "set highlight color", OFFSET(rgba_color), AV_OPT_TYPE_COLOR, {.str="yellow"}, .flags=FLAGS},
+ {NULL}
+};
+
+AVFILTER_DEFINE_CLASS(signalstats);
+
+static av_cold int init(AVFilterContext *ctx)
+{
+ uint8_t r, g, b;
+ SignalstatsContext *s = ctx->priv;
+
+ if (s->outfilter != FILTER_NONE)
+ s->filters |= 1 << s->outfilter;
+
+ r = s->rgba_color[0];
+ g = s->rgba_color[1];
+ b = s->rgba_color[2];
+ s->yuv_color[0] = (( 66*r + 129*g + 25*b + (1<<7)) >> 8) + 16;
+ s->yuv_color[1] = ((-38*r + -74*g + 112*b + (1<<7)) >> 8) + 128;
+ s->yuv_color[2] = ((112*r + -94*g + -18*b + (1<<7)) >> 8) + 128;
+ return 0;
+}
+
+static av_cold void uninit(AVFilterContext *ctx)
+{
+ SignalstatsContext *s = ctx->priv;
+ av_frame_free(&s->frame_prev);
+ av_freep(&s->vrep_line);
+}
+
+static int query_formats(AVFilterContext *ctx)
+{
+ // TODO: add more
+ enum AVPixelFormat pix_fmts[] = {
+ AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV411P,
+ AV_PIX_FMT_NONE
+ };
+
+ ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
+ return 0;
+}
+
+static int config_props(AVFilterLink *outlink)
+{
+ AVFilterContext *ctx = outlink->src;
+ SignalstatsContext *s = ctx->priv;
+ AVFilterLink *inlink = outlink->src->inputs[0];
+ const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(outlink->format);
+ s->hsub = desc->log2_chroma_w;
+ s->vsub = desc->log2_chroma_h;
+
+ outlink->w = inlink->w;
+ outlink->h = inlink->h;
+
+ s->chromaw = FF_CEIL_RSHIFT(inlink->w, s->hsub);
+ s->chromah = FF_CEIL_RSHIFT(inlink->h, s->vsub);
+
+ s->fs = inlink->w * inlink->h;
+ s->cfs = s->chromaw * s->chromah;
+
+ if (s->filters & 1<<FILTER_VREP) {
+ s->vrep_line = av_malloc(inlink->h * sizeof(*s->vrep_line));
+ if (!s->vrep_line)
+ return AVERROR(ENOMEM);
+ }
+
+ return 0;
+}
+
+static void burn_frame(SignalstatsContext *s, AVFrame *f, int x, int y)
+{
+ const int chromax = x >> s->hsub;
+ const int chromay = y >> s->vsub;
+ f->data[0][y * f->linesize[0] + x] = s->yuv_color[0];
+ f->data[1][chromay * f->linesize[1] + chromax] = s->yuv_color[1];
+ f->data[2][chromay * f->linesize[2] + chromax] = s->yuv_color[2];
+}
+
+static int filter_brng(SignalstatsContext *s, const AVFrame *in, AVFrame *out, int y, int w, int h)
+{
+ int x, score = 0;
+ const int yc = y >> s->vsub;
+ const uint8_t *pluma = &in->data[0][y * in->linesize[0]];
+ const uint8_t *pchromau = &in->data[1][yc * in->linesize[1]];
+ const uint8_t *pchromav = &in->data[2][yc * in->linesize[2]];
+
+ for (x = 0; x < w; x++) {
+ const int xc = x >> s->hsub;
+ const int luma = pluma[x];
+ const int chromau = pchromau[xc];
+ const int chromav = pchromav[xc];
+ const int filt = luma < 16 || luma > 235 ||
+ chromau < 16 || chromau > 240 ||
+ chromav < 16 || chromav > 240;
+ score += filt;
+ if (out && filt)
+ burn_frame(s, out, x, y);
+ }
+ return score;
+}
+
+static int filter_tout_outlier(uint8_t x, uint8_t y, uint8_t z)
+{
+ return ((abs(x - y) + abs (z - y)) / 2) - abs(z - x) > 4; // make 4 configurable?
+}
+
+static int filter_tout(SignalstatsContext *s, const AVFrame *in, AVFrame *out, int y, int w, int h)
+{
+ const uint8_t *p = in->data[0];
+ int lw = in->linesize[0];
+ int x, score = 0, filt;
+
+ if (y - 1 < 0 || y + 1 >= h)
+ return 0;
+
+ // detect two pixels above and below (to eliminate interlace artefacts)
+ // should check that video format is infact interlace.
+
+#define FILTER(i, j) \
+filter_tout_outlier(p[(y-j) * lw + x + i], \
+ p[ y * lw + x + i], \
+ p[(y+j) * lw + x + i])
+
+#define FILTER3(j) (FILTER(-1, j) && FILTER(0, j) && FILTER(1, j))
+
+ if (y - 2 >= 0 && y + 2 < h) {
+ for (x = 1; x < w - 1; x++) {
+ filt = FILTER3(2) && FILTER3(1);
+ score += filt;
+ if (filt && out)
+ burn_frame(s, out, x, y);
+ }
+ } else {
+ for (x = 1; x < w - 1; x++) {
+ filt = FILTER3(1);
+ score += filt;
+ if (filt && out)
+ burn_frame(s, out, x, y);
+ }
+ }
+ return score;
+}
+
+#define VREP_START 4
+
+static void filter_init_vrep(SignalstatsContext *s, const AVFrame *p, int w, int h)
+{
+ int i, y;
+ int lw = p->linesize[0];
+
+ for (y = VREP_START; y < h; y++) {
+ int totdiff = 0;
+ int y2lw = (y - VREP_START) * lw;
+ int ylw = y * lw;
+
+ for (i = 0; i < w; i++)
+ totdiff += abs(p->data[0][y2lw + i] - p->data[0][ylw + i]);
+
+ /* this value should be definable */
+ s->vrep_line[y] = totdiff < w;
+ }
+}
+
+static int filter_vrep(SignalstatsContext *s, const AVFrame *in, AVFrame *out, int y, int w, int h)
+{
+ int x, score = 0;
+
+ if (y < VREP_START)
+ return 0;
+
+ for (x = 0; x < w; x++) {
+ if (s->vrep_line[y]) {
+ score++;
+ if (out)
+ burn_frame(s, out, x, y);
+ }
+ }
+ return score;
+}
+
+static const struct {
+ const char *name;
+ void (*init)(SignalstatsContext *s, const AVFrame *p, int w, int h);
+ int (*process)(SignalstatsContext *s, const AVFrame *in, AVFrame *out, int y, int w, int h);
+} filters_def[] = {
+ {"TOUT", NULL, filter_tout},
+ {"VREP", filter_init_vrep, filter_vrep},
+ {"BRNG", NULL, filter_brng},
+ {NULL}
+};
+
+#define DEPTH 256
+
+static int filter_frame(AVFilterLink *link, AVFrame *in)
+{
+ SignalstatsContext *s = link->dst->priv;
+ AVFilterLink *outlink = link->dst->outputs[0];
+ AVFrame *out = in;
+ int i, j;
+ int w = 0, cw = 0, // in
+ pw = 0, cpw = 0; // prev
+ int yuv, yuvu, yuvv;
+ int fil;
+ char metabuf[128];
+ unsigned int histy[DEPTH] = {0},
+ histu[DEPTH] = {0},
+ histv[DEPTH] = {0},
+ histhue[360] = {0},
+ histsat[DEPTH] = {0}; // limited to 8 bit data.
+ int miny = -1, minu = -1, minv = -1;
+ int maxy = -1, maxu = -1, maxv = -1;
+ int lowy = -1, lowu = -1, lowv = -1;
+ int highy = -1, highu = -1, highv = -1;
+ int minsat = -1, maxsat = -1, lowsat = -1, highsat = -1;
+ int lowp, highp, clowp, chighp;
+ int accy, accu, accv;
+ int accsat, acchue=0;
+ int medhue, maxhue;
+ int toty = 0, totu = 0, totv = 0, totsat=0;
+ int tothue = 0;
+ int dify = 0, difu = 0, difv = 0;
+
+ int filtot[FILT_NUMB] = {0};
+ AVFrame *prev;
+
+ if (!s->frame_prev)
+ s->frame_prev = av_frame_clone(in);
+
+ prev = s->frame_prev;
+
+ if (s->outfilter != FILTER_NONE)
+ out = av_frame_clone(in);
+
+ for (fil = 0; fil < FILT_NUMB; fil ++)
+ if ((s->filters & 1<<fil) && filters_def[fil].init)
+ filters_def[fil].init(s, in, link->w, link->h);
+
+ // Calculate luma histogram and difference with previous frame or field.
+ for (j = 0; j < link->h; j++) {
+ for (i = 0; i < link->w; i++) {
+ yuv = in->data[0][w + i];
+ histy[yuv]++;
+ dify += abs(in->data[0][w + i] - prev->data[0][pw + i]);
+ }
+ w += in->linesize[0];
+ pw += prev->linesize[0];
+ }
+
+ // Calculate chroma histogram and difference with previous frame or field.
+ for (j = 0; j < s->chromah; j++) {
+ for (i = 0; i < s->chromaw; i++) {
+ int sat, hue;
+
+ yuvu = in->data[1][cw+i];
+ yuvv = in->data[2][cw+i];
+ histu[yuvu]++;
+ difu += abs(in->data[1][cw+i] - prev->data[1][cpw+i]);
+ histv[yuvv]++;
+ difv += abs(in->data[2][cw+i] - prev->data[2][cpw+i]);
+
+ // int or round?
+ sat = ff_sqrt((yuvu-128) * (yuvu-128) + (yuvv-128) * (yuvv-128));
+ histsat[sat]++;
+ hue = floor((180 / M_PI) * atan2f(yuvu-128, yuvv-128) + 180);
+ histhue[hue]++;
+ }
+ cw += in->linesize[1];
+ cpw += prev->linesize[1];
+ }
+
+ for (j = 0; j < link->h; j++) {
+ for (fil = 0; fil < FILT_NUMB; fil ++) {
+ if (s->filters & 1<<fil) {
+ AVFrame *dbg = out != in && s->outfilter == fil ? out : NULL;
+ filtot[fil] += filters_def[fil].process(s, in, dbg, j, link->w, link->h);
+ }
+ }
+ }
+
+ // find low / high based on histogram percentile
+ // these only need to be calculated once.
+
+ lowp = s->fs * 10 / 100;
+ highp = s->fs * 90 / 100;
+ clowp = s->cfs * 10 / 100;
+ chighp = s->cfs * 90 / 100;
+
+ accy = accu = accv = accsat = 0;
+ for (fil = 0; fil < DEPTH; fil++) {
+ if (miny < 0 && histy[fil]) miny = fil;
+ if (minu < 0 && histu[fil]) minu = fil;
+ if (minv < 0 && histv[fil]) minv = fil;
+ if (minsat < 0 && histsat[fil]) minsat = fil;
+
+ if (histy[fil]) maxy = fil;
+ if (histu[fil]) maxu = fil;
+ if (histv[fil]) maxv = fil;
+ if (histsat[fil]) maxsat = fil;
+
+ toty += histy[fil] * fil;
+ totu += histu[fil] * fil;
+ totv += histv[fil] * fil;
+ totsat += histsat[fil] * fil;
+
+ accy += histy[fil];
+ accu += histu[fil];
+ accv += histv[fil];
+ accsat += histsat[fil];
+
+ if (lowy == -1 && accy >= lowp) lowy = fil;
+ if (lowu == -1 && accu >= clowp) lowu = fil;
+ if (lowv == -1 && accv >= clowp) lowv = fil;
+ if (lowsat == -1 && accsat >= clowp) lowsat = fil;
+
+ if (highy == -1 && accy >= highp) highy = fil;
+ if (highu == -1 && accu >= chighp) highu = fil;
+ if (highv == -1 && accv >= chighp) highv = fil;
+ if (highsat == -1 && accsat >= chighp) highsat = fil;
+ }
+
+ maxhue = histhue[0];
+ medhue = -1;
+ for (fil = 0; fil < 360; fil++) {
+ tothue += histhue[fil] * fil;
+ acchue += histhue[fil];
+
+ if (medhue == -1 && acchue > s->cfs / 2)
+ medhue = fil;
+ if (histhue[fil] > maxhue) {
+ maxhue = histhue[fil];
+ }
+ }
+
+ av_frame_free(&s->frame_prev);
+ s->frame_prev = av_frame_clone(in);
+
+#define SET_META(key, fmt, val) do { \
+ snprintf(metabuf, sizeof(metabuf), fmt, val); \
+ av_dict_set(&out->metadata, "lavfi.values." key, metabuf, 0); \
+} while (0)
+
+ SET_META("YMIN", "%d", miny);
+ SET_META("YLOW", "%d", lowy);
+ SET_META("YAVG", "%g", 1.0 * toty / s->fs);
+ SET_META("YHIGH", "%d", highy);
+ SET_META("YMAX", "%d", maxy);
+
+ SET_META("UMIN", "%d", minu);
+ SET_META("ULOW", "%d", lowu);
+ SET_META("UAVG", "%g", 1.0 * totu / s->cfs);
+ SET_META("UHIGH", "%d", highu);
+ SET_META("UMAX", "%d", maxu);
+
+ SET_META("VMIN", "%d", minv);
+ SET_META("VLOW", "%d", lowv);
+ SET_META("VAVG", "%g", 1.0 * totv / s->cfs);
+ SET_META("VHIGH", "%d", highv);
+ SET_META("VMAX", "%d", maxv);
+
+ SET_META("SATMIN", "%d", minsat);
+ SET_META("SATLOW", "%d", lowsat);
+ SET_META("SATAVG", "%g", 1.0 * totsat / s->cfs);
+ SET_META("SATHIGH", "%d", highsat);
+ SET_META("SATMAX", "%d", maxsat);
+
+ SET_META("HUEMED", "%d", medhue);
+ SET_META("HUEAVG", "%g", 1.0 * tothue / s->cfs);
+
+ SET_META("YDIF", "%g", 1.0 * dify / s->fs);
+ SET_META("UDIF", "%g", 1.0 * difu / s->cfs);
+ SET_META("VDIF", "%g", 1.0 * difv / s->cfs);
+
+ for (fil = 0; fil < FILT_NUMB; fil ++) {
+ if (s->filters & 1<<fil) {
+ char metaname[128];
+ snprintf(metabuf, sizeof(metabuf), "%g", 1.0 * filtot[fil] / s->fs);
+ snprintf(metaname, sizeof(metaname), "lavfi.values.%s", filters_def[fil].name);
+ av_dict_set(&out->metadata, metaname, metabuf, 0);
+ }
+ }
+
+ if (in != out)
+ av_frame_free(&in);
+ return ff_filter_frame(outlink, out);
+}
+
+static const AVFilterPad signalstats_inputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .filter_frame = filter_frame,
+ },
+ { NULL }
+};
+
+static const AVFilterPad signalstats_outputs[] = {
+ {
+ .name = "default",
+ .config_props = config_props,
+ .type = AVMEDIA_TYPE_VIDEO,
+ },
+ { NULL }
+};
+
+AVFilter ff_vf_signalstats = {
+ .name = "signalstats",
+ .description = "Generate statistics from video analysis.",
+ .init = init,
+ .uninit = uninit,
+ .query_formats = query_formats,
+ .priv_size = sizeof(SignalstatsContext),
+ .inputs = signalstats_inputs,
+ .outputs = signalstats_outputs,
+ .priv_class = &signalstats_class,
+};
--
1.9.3
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