[FFmpeg-devel] [PATCH] libavfilter/vf_signalstats.c: add new hsl(Hue, Saturation, Lightness) for filter signalstats
liuyizhuo
yizhuo.liu753 at gmail.com
Sun Feb 26 17:02:56 EET 2023
From: "yizhuo.liu753 at gmail.com" <yizhuo.liu753 at gmail.com>
---
libavfilter/vf_signalstats.c | 244 +++++++++++++++++++++++++++++++----
1 file changed, 219 insertions(+), 25 deletions(-)
diff --git a/libavfilter/vf_signalstats.c b/libavfilter/vf_signalstats.c
index b4d1029296..90dbe853fa 100644
--- a/libavfilter/vf_signalstats.c
+++ b/libavfilter/vf_signalstats.c
@@ -1,7 +1,9 @@
/*
* Copyright (c) 2010 Mark Heath mjpeg0 @ silicontrip dot org
- * Copyright (c) 2014 Clément Bœsch
+ * Copyright (c) 2014 Clément Bœsch
* Copyright (c) 2014 Dave Rice @dericed
+ * Copyright (c) 2022 Wang Wei <wangwei1237 at gmail.com>
+ * Copyright (c) 2022 Liu yizhuo <yizhuo.liu753 at gmail.com>
*
* This file is part of FFmpeg.
*
@@ -23,8 +25,8 @@
#include "libavutil/intreadwrite.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
-#include "filters.h"
#include "internal.h"
+#include "libswscale/swscale.h"
enum FilterMode {
FILTER_NONE = -1,
@@ -36,6 +38,8 @@ enum FilterMode {
typedef struct SignalstatsContext {
const AVClass *class;
+ int lumah; // height of luma plane
+ int lumaw; // width of luma plane
int chromah; // height of chroma plane
int chromaw; // width of chroma plane
int hsub; // horizontal subsampling
@@ -56,6 +60,11 @@ typedef struct SignalstatsContext {
AVFrame *frame_sat;
AVFrame *frame_hue;
+ AVFrame *frame_rgb;
+
+ int *hsl_h;
+ int *hsl_s;
+ int *hsl_l;
} SignalstatsContext;
typedef struct ThreadData {
@@ -65,9 +74,21 @@ typedef struct ThreadData {
typedef struct ThreadDataHueSatMetrics {
const AVFrame *src;
- AVFrame *dst_sat, *dst_hue;
+ AVFrame *dst_sat, *dst_hue, *dst_h, *dst_s, *dst_l;
} ThreadDataHueSatMetrics;
+typedef struct ThreadDataHSLMetrics {
+ const AVFrame *src;
+ int *dst_h, *dst_s, *dst_l;
+} ThreadDataHSLMetrics;
+
+typedef float num;
+
+static const float EPSILON = 1e-9;
+
+/** @brief Equal of A and B */
+#define EQ(A,B) ((fabs((A) - (B)) < EPSILON) ? 1 : 0)
+
#define OFFSET(x) offsetof(SignalstatsContext, x)
#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
@@ -101,6 +122,7 @@ static av_cold int init(AVFilterContext *ctx)
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;
}
@@ -110,11 +132,15 @@ static av_cold void uninit(AVFilterContext *ctx)
av_frame_free(&s->frame_prev);
av_frame_free(&s->frame_sat);
av_frame_free(&s->frame_hue);
+ av_frame_free(&s->frame_rgb);
av_freep(&s->jobs_rets);
av_freep(&s->histy);
av_freep(&s->histu);
av_freep(&s->histv);
av_freep(&s->histsat);
+ av_freep(&s->hsl_h);
+ av_freep(&s->hsl_s);
+ av_freep(&s->hsl_l);
}
// TODO: add more
@@ -151,6 +177,23 @@ static AVFrame *alloc_frame(enum AVPixelFormat pixfmt, int w, int h)
return frame;
}
+static int config_input(AVFilterLink *inlink)
+{
+ // Video input data avilable
+ AVFilterContext *ctx = inlink->dst;
+ SignalstatsContext *s = ctx->priv;
+
+ // free previous buffers in case they are allocated already
+ av_frame_free(&s->frame_rgb);
+ s->frame_rgb = alloc_frame(AV_PIX_FMT_RGB24, inlink->w, inlink->h);
+
+ if (!s->frame_rgb) {
+ return AVERROR(ENOMEM);
+ }
+
+ return 0;
+}
+
static int config_output(AVFilterLink *outlink)
{
AVFilterContext *ctx = outlink->src;
@@ -172,12 +215,22 @@ static int config_output(AVFilterLink *outlink)
outlink->w = inlink->w;
outlink->h = inlink->h;
+ s->lumaw = inlink->w;
+ s->lumah = 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->hsl_h = av_malloc_array(s->lumah, sizeof(*s->hsl_h));
+ s->hsl_s = av_malloc_array(s->lumah, sizeof(*s->hsl_s));
+ s->hsl_l = av_malloc_array(s->lumah, sizeof(*s->hsl_l));
+ if (!s->hsl_h || !s->hsl_s || !s->hsl_l) {
+ return AVERROR(ENOMEM);
+ }
+
s->nb_jobs = FFMAX(1, FFMIN(inlink->h, ff_filter_get_nb_threads(ctx)));
s->jobs_rets = av_malloc_array(s->nb_jobs, sizeof(*s->jobs_rets));
if (!s->jobs_rets)
@@ -455,6 +508,110 @@ static const struct {
{NULL}
};
+static void YUV2RGB(const AVFrame* src, enum AVPixelFormat dstFormat, AVFrame* dst)
+{
+ int width = src->width;
+ int height = src->height;
+
+ struct SwsContext* conversion = NULL;
+ conversion = sws_getContext(width,
+ height,
+ (enum AVPixelFormat)src->format,
+ width,
+ height,
+ dstFormat,
+ SWS_FAST_BILINEAR,
+ NULL,
+ NULL,
+ NULL);
+ sws_scale(conversion, (const uint8_t * const *)src->data, src->linesize, 0, height, dst->data, dst->linesize);
+ sws_freeContext(conversion);
+}
+
+/**
+ * @brief Convert an sRGB color to Hue-Saturation-Lightness (HSL)
+ *
+ * @param H, S, L pointers to hold the result
+ * @param R, G, B the input sRGB values scaled in [0,1]
+ *
+ * This routine transforms from sRGB to the double hexcone HSL color space
+ * The sRGB values are assumed to be between 0 and 1. The outputs are
+ * H = hexagonal hue angle (0 <= H < 360),
+ * S = { C/(2L) if L <= 1/2 (0 <= S <= 1),
+ * { C/(2 - 2L) if L > 1/2
+ * L = (max(R',G',B') + min(R',G',B'))/2 (0 <= L <= 1),
+ * where C = max(R',G',B') - min(R',G',B').
+ *
+ * Wikipedia: http://en.wikipedia.org/wiki/HSL_and_HSV
+ */
+static void RGB2HSL(num *H, num *S, num *L, num R, num G, num B)
+{
+ num Max = FFMAX3(R, G, B);
+ num Min = FFMIN3(R, G, B);
+ num C = Max - Min;
+
+ *L = (Max + Min) / 2;
+
+ if (C > 0) {
+ if (EQ(Max, R)) {
+ *H = (G - B) / C;
+
+ if (G < B) {
+ *H += 6;
+ }
+ } else if (EQ(Max, G)) {
+ *H = 2 + (B - R) / C;
+ } else {
+ *H = 4 + (R - G) / C;
+ }
+
+ *H *= 60;
+ *S = (*L <= 0.5) ? (C/(2*(*L))) : (C/(2 - 2*(*L)));
+ } else {
+ *H = *S = 0;
+ }
+}
+
+static int compute_hsl(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
+{
+ int i, j;
+ num H, S, L;
+ ThreadDataHSLMetrics *td = arg;
+ const SignalstatsContext *s = ctx->priv;
+ const AVFrame *src = td->src;
+ int *dst_h = td->dst_h;
+ int *dst_s = td->dst_s;
+ int *dst_l = td->dst_l;
+
+ const int slice_start = (s->lumah * jobnr ) / nb_jobs;
+ const int slice_end = (s->lumah * (jobnr+1)) / nb_jobs;
+
+ const int lsz_src = src->linesize[0];
+ const uint8_t *p_src = src->data[0] + slice_start * lsz_src;
+
+ for (j = slice_start; j < slice_end; j++) {
+ int line_h = 0, line_s = 0, line_l = 0;
+ for (i = 0; i < s->lumaw; i++) {
+ const uint8_t rgbr = p_src[3 * i];
+ const uint8_t rgbg = p_src[3 * i + 1];
+ const uint8_t rgbb = p_src[3 * i + 2];
+
+ RGB2HSL(&H, &S, &L, 1.0 * rgbr / 255, 1.0 * rgbg / 255, 1.0 * rgbb / 255);
+ line_h += (uint16_t)(H + 0.5);
+ line_s += (uint8_t)(S * 100 + 0.5);
+ line_l += (uint8_t)(L * 100 + 0.5);
+ }
+
+ dst_h[j] = line_h / s->lumaw;
+ dst_s[j] = line_s / s->lumaw;
+ dst_l[j] = line_l / s->lumaw;
+
+ p_src += lsz_src;
+ }
+
+ return 0;
+}
+
static int compute_sat_hue_metrics8(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
{
int i, j;
@@ -562,11 +719,12 @@ static int filter_frame8(AVFilterLink *link, AVFrame *in)
int accy, accu, accv;
int accsat, acchue = 0;
int medhue, maxhue;
+ int avgh = 0, avgs = 0, avgl = 0;
int toty = 0, totu = 0, totv = 0, totsat=0;
int tothue = 0;
int dify = 0, difu = 0, difv = 0;
uint16_t masky = 0, masku = 0, maskv = 0;
- int ret;
+
int filtot[FILT_NUMB] = {0};
AVFrame *prev;
@@ -589,21 +747,34 @@ static int filter_frame8(AVFilterLink *link, AVFrame *in)
if (s->outfilter != FILTER_NONE) {
out = av_frame_clone(in);
- if (!out) {
- av_frame_free(&in);
- return AVERROR(ENOMEM);
- }
- ret = ff_inlink_make_frame_writable(link, &out);
- if (ret < 0) {
- av_frame_free(&out);
- av_frame_free(&in);
- return ret;
- }
+ av_frame_make_writable(out);
}
ff_filter_execute(ctx, compute_sat_hue_metrics8, &td_huesat,
NULL, FFMIN(s->chromah, ff_filter_get_nb_threads(ctx)));
+ // Calculate HSL information.
+ YUV2RGB(in, AV_PIX_FMT_RGB24, s->frame_rgb);
+ ThreadDataHSLMetrics td_hsl = {
+ .src = s->frame_rgb,
+ .dst_h = s->hsl_h,
+ .dst_s = s->hsl_s,
+ .dst_l = s->hsl_l,
+ };
+ ff_filter_execute(ctx, compute_hsl, &td_hsl,
+ NULL, FFMIN(link->h, ff_filter_get_nb_threads(ctx)));
+
+ int sumh = 0, sums = 0, suml = 0;
+ for (j = 0; j < s->lumah; j++) {
+ sumh += s->hsl_h[j];
+ sums += s->hsl_s[j];
+ suml += s->hsl_l[j];
+ }
+
+ avgh = sumh / s->lumah;
+ avgs = sums / s->lumah;
+ avgl = suml / s->lumah;
+
// Calculate luma histogram and difference with previous frame or field.
memset(s->histy, 0, s->maxsize * sizeof(*s->histy));
for (j = 0; j < link->h; j++) {
@@ -746,6 +917,10 @@ static int filter_frame8(AVFilterLink *link, AVFrame *in)
SET_META("HUEMED", "%d", medhue);
SET_META("HUEAVG", "%g", 1.0 * tothue / s->cfs);
+ SET_META("HAVG", "%d", avgh);
+ SET_META("SAVG", "%d", avgs);
+ SET_META("LAVG", "%d", avgl);
+
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);
@@ -793,6 +968,7 @@ static int filter_frame16(AVFilterLink *link, AVFrame *in)
int accy, accu, accv;
int accsat, acchue = 0;
int medhue, maxhue;
+ int avgh = 0, avgs = 0, avgl = 0;
int64_t toty = 0, totu = 0, totv = 0, totsat=0;
int64_t tothue = 0;
int64_t dify = 0, difu = 0, difv = 0;
@@ -800,7 +976,7 @@ static int filter_frame16(AVFilterLink *link, AVFrame *in)
int filtot[FILT_NUMB] = {0};
AVFrame *prev;
- int ret;
+
AVFrame *sat = s->frame_sat;
AVFrame *hue = s->frame_hue;
const uint16_t *p_sat = (uint16_t *)sat->data[0];
@@ -820,21 +996,34 @@ static int filter_frame16(AVFilterLink *link, AVFrame *in)
if (s->outfilter != FILTER_NONE) {
out = av_frame_clone(in);
- if (!out) {
- av_frame_free(&in);
- return AVERROR(ENOMEM);
- }
- ret = ff_inlink_make_frame_writable(link, &out);
- if (ret < 0) {
- av_frame_free(&out);
- av_frame_free(&in);
- return ret;
- }
+ av_frame_make_writable(out);
}
ff_filter_execute(ctx, compute_sat_hue_metrics16, &td_huesat,
NULL, FFMIN(s->chromah, ff_filter_get_nb_threads(ctx)));
+ // Calculate HSL information.
+ YUV2RGB(in, AV_PIX_FMT_RGB24, s->frame_rgb);
+ ThreadDataHSLMetrics td_hsl = {
+ .src = s->frame_rgb,
+ .dst_h = s->hsl_h,
+ .dst_s = s->hsl_s,
+ .dst_l = s->hsl_l,
+ };
+ ff_filter_execute(ctx, compute_hsl, &td_hsl,
+ NULL, FFMIN(link->h, ff_filter_get_nb_threads(ctx)));
+
+ int sumh = 0, sums = 0, suml = 0;
+ for (j = 0; j < s->lumah; j++) {
+ sumh += s->hsl_h[j];
+ sums += s->hsl_s[j];
+ suml += s->hsl_l[j];
+ }
+
+ avgh = sumh / s->lumah;
+ avgs = sums / s->lumah;
+ avgl = suml / s->lumah;
+
// Calculate luma histogram and difference with previous frame or field.
memset(s->histy, 0, s->maxsize * sizeof(*s->histy));
for (j = 0; j < link->h; j++) {
@@ -972,6 +1161,10 @@ static int filter_frame16(AVFilterLink *link, AVFrame *in)
SET_META("HUEMED", "%d", medhue);
SET_META("HUEAVG", "%g", 1.0 * tothue / s->cfs);
+ SET_META("HAVG", "%d", avgh);
+ SET_META("SAVG", "%d", avgs);
+ SET_META("LAVG", "%d", avgl);
+
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);
@@ -1009,6 +1202,7 @@ static const AVFilterPad signalstats_inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
+ .config_props = config_input,
.filter_frame = filter_frame,
},
};
--
2.24.3 (Apple Git-128)
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