| /* |
| * 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 "internal.h" |
| |
| enum FilterMode { |
| FILTER_NONE = -1, |
| FILTER_TOUT, |
| FILTER_VREP, |
| FILTER_BRNG, |
| FILT_NUMB |
| }; |
| |
| typedef struct { |
| const AVClass *class; |
| int chromah; // height of chroma plane |
| int chromaw; // width of chroma plane |
| int hsub; // horizontal subsampling |
| int vsub; // vertical subsampling |
| int fs; // pixel count per frame |
| int cfs; // pixel count per frame of chroma planes |
| int outfilter; // FilterMode |
| int filters; |
| AVFrame *frame_prev; |
| uint8_t rgba_color[4]; |
| int yuv_color[3]; |
| int nb_jobs; |
| int *jobs_rets; |
| |
| AVFrame *frame_sat; |
| AVFrame *frame_hue; |
| } SignalstatsContext; |
| |
| typedef struct ThreadData { |
| const AVFrame *in; |
| AVFrame *out; |
| } ThreadData; |
| |
| typedef struct ThreadDataHueSatMetrics { |
| const AVFrame *src; |
| AVFrame *dst_sat, *dst_hue; |
| } ThreadDataHueSatMetrics; |
| |
| #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 repetition", 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 repetition", 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_frame_free(&s->frame_sat); |
| av_frame_free(&s->frame_hue); |
| av_freep(&s->jobs_rets); |
| } |
| |
| static int query_formats(AVFilterContext *ctx) |
| { |
| // TODO: add more |
| static const enum AVPixelFormat pix_fmts[] = { |
| AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV411P, |
| AV_PIX_FMT_YUV440P, |
| AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ411P, |
| AV_PIX_FMT_YUVJ440P, |
| AV_PIX_FMT_NONE |
| }; |
| |
| AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts); |
| if (!fmts_list) |
| return AVERROR(ENOMEM); |
| return ff_set_common_formats(ctx, fmts_list); |
| } |
| |
| static AVFrame *alloc_frame(enum AVPixelFormat pixfmt, int w, int h) |
| { |
| AVFrame *frame = av_frame_alloc(); |
| if (!frame) |
| return NULL; |
| |
| frame->format = pixfmt; |
| frame->width = w; |
| frame->height = h; |
| |
| if (av_frame_get_buffer(frame, 32) < 0) { |
| av_frame_free(&frame); |
| return NULL; |
| } |
| |
| return frame; |
| } |
| |
| 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 = AV_CEIL_RSHIFT(inlink->w, s->hsub); |
| s->chromah = AV_CEIL_RSHIFT(inlink->h, s->vsub); |
| |
| s->fs = inlink->w * inlink->h; |
| s->cfs = s->chromaw * s->chromah; |
| |
| s->nb_jobs = FFMAX(1, FFMIN(inlink->h, ctx->graph->nb_threads)); |
| s->jobs_rets = av_malloc_array(s->nb_jobs, sizeof(*s->jobs_rets)); |
| if (!s->jobs_rets) |
| return AVERROR(ENOMEM); |
| |
| s->frame_sat = alloc_frame(AV_PIX_FMT_GRAY8, inlink->w, inlink->h); |
| s->frame_hue = alloc_frame(AV_PIX_FMT_GRAY16, inlink->w, inlink->h); |
| if (!s->frame_sat || !s->frame_hue) |
| return AVERROR(ENOMEM); |
| |
| return 0; |
| } |
| |
| static void burn_frame(const 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(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs) |
| { |
| ThreadData *td = arg; |
| const SignalstatsContext *s = ctx->priv; |
| const AVFrame *in = td->in; |
| AVFrame *out = td->out; |
| const int w = in->width; |
| const int h = in->height; |
| const int slice_start = (h * jobnr ) / nb_jobs; |
| const int slice_end = (h * (jobnr+1)) / nb_jobs; |
| int x, y, score = 0; |
| |
| for (y = slice_start; y < slice_end; y++) { |
| 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(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs) |
| { |
| ThreadData *td = arg; |
| const SignalstatsContext *s = ctx->priv; |
| const AVFrame *in = td->in; |
| AVFrame *out = td->out; |
| const int w = in->width; |
| const int h = in->height; |
| const int slice_start = (h * jobnr ) / nb_jobs; |
| const int slice_end = (h * (jobnr+1)) / nb_jobs; |
| const uint8_t *p = in->data[0]; |
| int lw = in->linesize[0]; |
| int x, y, score = 0, filt; |
| |
| for (y = slice_start; y < slice_end; y++) { |
| |
| if (y - 1 < 0 || y + 1 >= h) |
| continue; |
| |
| // detect two pixels above and below (to eliminate interlace artefacts) |
| // should check that video format is infact interlaced. |
| |
| #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 int filter_vrep(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs) |
| { |
| ThreadData *td = arg; |
| const SignalstatsContext *s = ctx->priv; |
| const AVFrame *in = td->in; |
| AVFrame *out = td->out; |
| const int w = in->width; |
| const int h = in->height; |
| const int slice_start = (h * jobnr ) / nb_jobs; |
| const int slice_end = (h * (jobnr+1)) / nb_jobs; |
| const uint8_t *p = in->data[0]; |
| const int lw = in->linesize[0]; |
| int x, y, score = 0; |
| |
| for (y = slice_start; y < slice_end; y++) { |
| const int y2lw = (y - VREP_START) * lw; |
| const int ylw = y * lw; |
| int filt, totdiff = 0; |
| |
| if (y < VREP_START) |
| continue; |
| |
| for (x = 0; x < w; x++) |
| totdiff += abs(p[y2lw + x] - p[ylw + x]); |
| filt = totdiff < w; |
| |
| score += filt; |
| if (filt && out) |
| for (x = 0; x < w; x++) |
| burn_frame(s, out, x, y); |
| } |
| return score * w; |
| } |
| |
| static const struct { |
| const char *name; |
| int (*process)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs); |
| } filters_def[] = { |
| {"TOUT", filter_tout}, |
| {"VREP", filter_vrep}, |
| {"BRNG", filter_brng}, |
| {NULL} |
| }; |
| |
| #define DEPTH 256 |
| |
| static int compute_sat_hue_metrics(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs) |
| { |
| int i, j; |
| ThreadDataHueSatMetrics *td = arg; |
| const SignalstatsContext *s = ctx->priv; |
| const AVFrame *src = td->src; |
| AVFrame *dst_sat = td->dst_sat; |
| AVFrame *dst_hue = td->dst_hue; |
| |
| const int slice_start = (s->chromah * jobnr ) / nb_jobs; |
| const int slice_end = (s->chromah * (jobnr+1)) / nb_jobs; |
| |
| const int lsz_u = src->linesize[1]; |
| const int lsz_v = src->linesize[2]; |
| const uint8_t *p_u = src->data[1] + slice_start * lsz_u; |
| const uint8_t *p_v = src->data[2] + slice_start * lsz_v; |
| |
| const int lsz_sat = dst_sat->linesize[0]; |
| const int lsz_hue = dst_hue->linesize[0]; |
| uint8_t *p_sat = dst_sat->data[0] + slice_start * lsz_sat; |
| uint8_t *p_hue = dst_hue->data[0] + slice_start * lsz_hue; |
| |
| for (j = slice_start; j < slice_end; j++) { |
| for (i = 0; i < s->chromaw; i++) { |
| const int yuvu = p_u[i]; |
| const int yuvv = p_v[i]; |
| p_sat[i] = hypot(yuvu - 128, yuvv - 128); // int or round? |
| ((int16_t*)p_hue)[i] = floor((180 / M_PI) * atan2f(yuvu-128, yuvv-128) + 180); |
| } |
| p_u += lsz_u; |
| p_v += lsz_v; |
| p_sat += lsz_sat; |
| p_hue += lsz_hue; |
| } |
| |
| return 0; |
| } |
| |
| static int filter_frame(AVFilterLink *link, AVFrame *in) |
| { |
| AVFilterContext *ctx = link->dst; |
| SignalstatsContext *s = ctx->priv; |
| AVFilterLink *outlink = ctx->outputs[0]; |
| AVFrame *out = in; |
| int i, j; |
| int w = 0, cw = 0, // in |
| pw = 0, cpw = 0; // prev |
| 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; |
| |
| AVFrame *sat = s->frame_sat; |
| AVFrame *hue = s->frame_hue; |
| const uint8_t *p_sat = sat->data[0]; |
| const uint8_t *p_hue = hue->data[0]; |
| const int lsz_sat = sat->linesize[0]; |
| const int lsz_hue = hue->linesize[0]; |
| ThreadDataHueSatMetrics td_huesat = { |
| .src = in, |
| .dst_sat = sat, |
| .dst_hue = hue, |
| }; |
| |
| 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); |
| av_frame_make_writable(out); |
| } |
| |
| ctx->internal->execute(ctx, compute_sat_hue_metrics, &td_huesat, |
| NULL, FFMIN(s->chromah, ctx->graph->nb_threads)); |
| |
| // Calculate luma histogram and difference with previous frame or field. |
| for (j = 0; j < link->h; j++) { |
| for (i = 0; i < link->w; i++) { |
| const int yuv = in->data[0][w + i]; |
| histy[yuv]++; |
| dify += abs(yuv - 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++) { |
| const int yuvu = in->data[1][cw+i]; |
| const int yuvv = in->data[2][cw+i]; |
| histu[yuvu]++; |
| difu += abs(yuvu - prev->data[1][cpw+i]); |
| histv[yuvv]++; |
| difv += abs(yuvv - prev->data[2][cpw+i]); |
| |
| histsat[p_sat[i]]++; |
| histhue[((int16_t*)p_hue)[i]]++; |
| } |
| cw += in->linesize[1]; |
| cpw += prev->linesize[1]; |
| p_sat += lsz_sat; |
| p_hue += lsz_hue; |
| } |
| |
| for (fil = 0; fil < FILT_NUMB; fil ++) { |
| if (s->filters & 1<<fil) { |
| ThreadData td = { |
| .in = in, |
| .out = out != in && s->outfilter == fil ? out : NULL, |
| }; |
| memset(s->jobs_rets, 0, s->nb_jobs * sizeof(*s->jobs_rets)); |
| ctx->internal->execute(ctx, filters_def[fil].process, |
| &td, s->jobs_rets, s->nb_jobs); |
| for (i = 0; i < s->nb_jobs; i++) |
| filtot[fil] += s->jobs_rets[i]; |
| } |
| } |
| |
| // find low / high based on histogram percentile |
| // these only need to be calculated once. |
| |
| lowp = lrint(s->fs * 10 / 100.); |
| highp = lrint(s->fs * 90 / 100.); |
| clowp = lrint(s->cfs * 10 / 100.); |
| chighp = lrint(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.signalstats." 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.signalstats.%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, |
| .flags = AVFILTER_FLAG_SLICE_THREADS, |
| }; |
