Signed-off-by: Paul B Mahol <one...@gmail.com>
---
doc/filters.texi | 46 +++++
libavfilter/Makefile | 1 +
libavfilter/allfilters.c | 1 +
libavfilter/vf_thistogram.c | 358 ++++++++++++++++++++++++++++++++++++
4 files changed, 406 insertions(+)
create mode 100644 libavfilter/vf_thistogram.c
diff --git a/doc/filters.texi b/doc/filters.texi
index 8c5d3a5760..4468351fc4 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -11674,6 +11674,7 @@ the histogram. Possible values are @code{none},
@code{weak} or
@code{strong}. It defaults to @code{none}.
@end table
+@anchor{histogram}
@section histogram
Compute and draw a color distribution histogram for the input video.
@@ -17717,6 +17718,51 @@ PAL output (25i):
16p: 33333334
@end example
+@section thistogram
+
+Compute and draw a color distribution histogram for the input video across
time.
+
+Unlike @ref{histogram} video filter which only shows histogram of single input
frame
+at certain time, this filter shows also past histograms of number of frames
defined
+by @code{width} option.
+
+The computed histogram is a representation of the color component
+distribution in an image.
+
+The filter accepts the following options:
+
+@table @option
+@item width
+Set width of single color component output. Default value is @code{1080}.
+This also set number of passed histograms to keep.
+Allowed range is [50, 8192].
+
+@item display_mode, d
+Set display mode.
+It accepts the following values:
+@table @samp
+@item stack
+Per color component graphs are placed below each other.
+
+@item parade
+Per color component graphs are placed side by side.
+
+@item overlay
+Presents information identical to that in the @code{parade}, except
+that the graphs representing color components are superimposed directly
+over one another.
+@end table
+Default is @code{stack}.
+
+@item levels_mode, m
+Set mode. Can be either @code{linear}, or @code{logarithmic}.
+Default is @code{linear}.
+
+@item components, c
+Set what color components to display.
+Default is @code{7}.
+@end table
+
@section threshold
Apply threshold effect to video stream.
diff --git a/libavfilter/Makefile b/libavfilter/Makefile
index 37d4eee858..cb024f95ff 100644
--- a/libavfilter/Makefile
+++ b/libavfilter/Makefile
@@ -401,6 +401,7 @@ OBJS-$(CONFIG_SWAPRECT_FILTER) +=
vf_swaprect.o
OBJS-$(CONFIG_SWAPUV_FILTER) += vf_swapuv.o
OBJS-$(CONFIG_TBLEND_FILTER) += vf_blend.o framesync.o
OBJS-$(CONFIG_TELECINE_FILTER) += vf_telecine.o
+OBJS-$(CONFIG_THISTOGRAM_FILTER) += vf_thistogram.o
OBJS-$(CONFIG_THRESHOLD_FILTER) += vf_threshold.o framesync.o
OBJS-$(CONFIG_THUMBNAIL_FILTER) += vf_thumbnail.o
OBJS-$(CONFIG_THUMBNAIL_CUDA_FILTER) += vf_thumbnail_cuda.o
vf_thumbnail_cuda.ptx.o
diff --git a/libavfilter/allfilters.c b/libavfilter/allfilters.c
index c295f8e403..9f2080f857 100644
--- a/libavfilter/allfilters.c
+++ b/libavfilter/allfilters.c
@@ -382,6 +382,7 @@ extern AVFilter ff_vf_swaprect;
extern AVFilter ff_vf_swapuv;
extern AVFilter ff_vf_tblend;
extern AVFilter ff_vf_telecine;
+extern AVFilter ff_vf_thistogram;
extern AVFilter ff_vf_threshold;
extern AVFilter ff_vf_thumbnail;
extern AVFilter ff_vf_thumbnail_cuda;
diff --git a/libavfilter/vf_thistogram.c b/libavfilter/vf_thistogram.c
new file mode 100644
index 0000000000..c29d8f8876
--- /dev/null
+++ b/libavfilter/vf_thistogram.c
@@ -0,0 +1,358 @@
+/*
+ * Copyright (c) 2019 Paul B Mahol
+ *
+ * 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/avassert.h"
+#include "libavutil/opt.h"
+#include "libavutil/parseutils.h"
+#include "libavutil/pixdesc.h"
+#include "libavutil/imgutils.h"
+#include "libavutil/intreadwrite.h"
+#include "avfilter.h"
+#include "formats.h"
+#include "internal.h"
+#include "video.h"
+
+typedef struct THistogramContext {
+ const AVClass *class; ///< AVClass context for log and
options purpose
+ unsigned histogram[65536];
+ int histogram_size;
+ int x_pos;
+ int mult;
+ int ncomp;
+ int dncomp;
+ int width;
+ int display_mode;
+ int levels_mode;
+ const AVPixFmtDescriptor *desc, *odesc;
+ int components;
+ int planewidth[4];
+ int planeheight[4];
+ uint8_t bg_color[4];
+ AVFrame *out;
+} THistogramContext;
+
+#define OFFSET(x) offsetof(THistogramContext, x)
+#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
+
+static const AVOption thistogram_options[] = {
+ { "width", "set width", OFFSET(width), AV_OPT_TYPE_INT, {.i64=1080}, 50,
8192, FLAGS},
+ { "display_mode", "set display mode", OFFSET(display_mode),
AV_OPT_TYPE_INT, {.i64=2}, 0, 2, FLAGS, "display_mode"},
+ { "d", "set display mode", OFFSET(display_mode),
AV_OPT_TYPE_INT, {.i64=2}, 0, 2, FLAGS, "display_mode"},
+ { "overlay", NULL, 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS,
"display_mode" },
+ { "parade", NULL, 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS,
"display_mode" },
+ { "stack", NULL, 0, AV_OPT_TYPE_CONST, {.i64=2}, 0, 0, FLAGS,
"display_mode" },
+ { "levels_mode", "set levels mode", OFFSET(levels_mode), AV_OPT_TYPE_INT,
{.i64=0}, 0, 1, FLAGS, "levels_mode"},
+ { "m", "set levels mode", OFFSET(levels_mode), AV_OPT_TYPE_INT,
{.i64=0}, 0, 1, FLAGS, "levels_mode"},
+ { "linear", NULL, 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS,
"levels_mode" },
+ { "logarithmic", NULL, 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS,
"levels_mode" },
+ { "components", "set color components to display", OFFSET(components),
AV_OPT_TYPE_INT, {.i64=7}, 1, 15, FLAGS},
+ { "c", "set color components to display", OFFSET(components),
AV_OPT_TYPE_INT, {.i64=7}, 1, 15, FLAGS},
+ { NULL }
+};
+
+AVFILTER_DEFINE_CLASS(thistogram);
+
+static const enum AVPixelFormat levels_in_pix_fmts[] = {
+ AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUVJ420P,
+ AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUVJ422P,
+ AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUVJ411P,
+ AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV410P,
+ AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUVJ444P,
+ AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9,
+ AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA444P9,
+ AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10,
+ AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA444P10,
+ AV_PIX_FMT_YUV420P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV444P12,
AV_PIX_FMT_YUV440P12,
+ AV_PIX_FMT_GBRAP, AV_PIX_FMT_GBRP,
+ AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10, AV_PIX_FMT_GBRAP10,
+ AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRAP12,
+ AV_PIX_FMT_GRAY8,
+ AV_PIX_FMT_NONE
+};
+
+static const enum AVPixelFormat levels_out_yuv8_pix_fmts[] = {
+ AV_PIX_FMT_YUV444P,
+ AV_PIX_FMT_NONE
+};
+
+static const enum AVPixelFormat levels_out_yuv9_pix_fmts[] = {
+ AV_PIX_FMT_YUV444P9,
+ AV_PIX_FMT_NONE
+};
+
+static const enum AVPixelFormat levels_out_yuv10_pix_fmts[] = {
+ AV_PIX_FMT_YUV444P10,
+ AV_PIX_FMT_NONE
+};
+
+static const enum AVPixelFormat levels_out_yuv12_pix_fmts[] = {
+ AV_PIX_FMT_YUV444P12,
+ AV_PIX_FMT_NONE
+};
+
+static const enum AVPixelFormat levels_out_rgb8_pix_fmts[] = {
+ AV_PIX_FMT_GBRP,
+ AV_PIX_FMT_NONE
+};
+
+static const enum AVPixelFormat levels_out_rgb9_pix_fmts[] = {
+ AV_PIX_FMT_GBRP9,
+ AV_PIX_FMT_NONE
+};
+
+static const enum AVPixelFormat levels_out_rgb10_pix_fmts[] = {
+ AV_PIX_FMT_GBRP10,
+ AV_PIX_FMT_NONE
+};
+
+static const enum AVPixelFormat levels_out_rgb12_pix_fmts[] = {
+ AV_PIX_FMT_GBRP12,
+ AV_PIX_FMT_NONE
+};
+
+static int query_formats(AVFilterContext *ctx)
+{
+ AVFilterFormats *avff;
+ const AVPixFmtDescriptor *desc;
+ const enum AVPixelFormat *out_pix_fmts;
+ int rgb, i, bits;
+ int ret;
+
+ if (!ctx->inputs[0]->in_formats ||
+ !ctx->inputs[0]->in_formats->nb_formats) {
+ return AVERROR(EAGAIN);
+ }
+
+ if (!ctx->inputs[0]->out_formats)
+ if ((ret = ff_formats_ref(ff_make_format_list(levels_in_pix_fmts),
&ctx->inputs[0]->out_formats)) < 0)
+ return ret;
+ avff = ctx->inputs[0]->in_formats;
+ desc = av_pix_fmt_desc_get(avff->formats[0]);
+ rgb = desc->flags & AV_PIX_FMT_FLAG_RGB;
+ bits = desc->comp[0].depth;
+ for (i = 1; i < avff->nb_formats; i++) {
+ desc = av_pix_fmt_desc_get(avff->formats[i]);
+ if ((rgb != (desc->flags & AV_PIX_FMT_FLAG_RGB)) ||
+ (bits != desc->comp[0].depth))
+ return AVERROR(EAGAIN);
+ }
+
+ if (rgb && bits == 8)
+ out_pix_fmts = levels_out_rgb8_pix_fmts;
+ else if (rgb && bits == 9)
+ out_pix_fmts = levels_out_rgb9_pix_fmts;
+ else if (rgb && bits == 10)
+ out_pix_fmts = levels_out_rgb10_pix_fmts;
+ else if (rgb && bits == 12)
+ out_pix_fmts = levels_out_rgb12_pix_fmts;
+ else if (bits == 8)
+ out_pix_fmts = levels_out_yuv8_pix_fmts;
+ else if (bits == 9)
+ out_pix_fmts = levels_out_yuv9_pix_fmts;
+ else if (bits == 10)
+ out_pix_fmts = levels_out_yuv10_pix_fmts;
+ else if (bits == 12)
+ out_pix_fmts = levels_out_yuv12_pix_fmts;
+ else
+ return AVERROR(EAGAIN);
+ if ((ret = ff_formats_ref(ff_make_format_list(out_pix_fmts),
&ctx->outputs[0]->in_formats)) < 0)
+ return ret;
+
+ return 0;
+}
+
+static const uint8_t black_yuva_color[4] = { 0, 127, 127, 255 };
+static const uint8_t black_gbrp_color[4] = { 0, 0, 0, 255 };
+
+static int config_input(AVFilterLink *inlink)
+{
+ THistogramContext *s = inlink->dst->priv;
+
+ s->desc = av_pix_fmt_desc_get(inlink->format);
+ s->ncomp = s->desc->nb_components;
+ s->histogram_size = 1 << s->desc->comp[0].depth;
+ s->mult = s->histogram_size / 256;
+
+ switch (inlink->format) {
+ case AV_PIX_FMT_GBRAP12:
+ case AV_PIX_FMT_GBRP12:
+ case AV_PIX_FMT_GBRAP10:
+ case AV_PIX_FMT_GBRP10:
+ case AV_PIX_FMT_GBRP9:
+ case AV_PIX_FMT_GBRAP:
+ case AV_PIX_FMT_GBRP:
+ memcpy(s->bg_color, black_gbrp_color, 4);
+ break;
+ default:
+ memcpy(s->bg_color, black_yuva_color, 4);
+ }
+
+ s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(inlink->h,
s->desc->log2_chroma_h);
+ s->planeheight[0] = s->planeheight[3] = inlink->h;
+ s->planewidth[1] = s->planewidth[2] = AV_CEIL_RSHIFT(inlink->w,
s->desc->log2_chroma_w);
+ s->planewidth[0] = s->planewidth[3] = inlink->w;
+
+ return 0;
+}
+
+static int config_output(AVFilterLink *outlink)
+{
+ AVFilterContext *ctx = outlink->src;
+ THistogramContext *s = ctx->priv;
+ int ncomp = 0, i;
+
+ for (i = 0; i < s->ncomp; i++) {
+ if ((1 << i) & s->components)
+ ncomp++;
+ }
+ outlink->w = s->width * FFMAX(ncomp * (s->display_mode == 1), 1);
+ outlink->h = s->histogram_size * FFMAX(ncomp * (s->display_mode == 2), 1);
+
+ s->odesc = av_pix_fmt_desc_get(outlink->format);
+ s->dncomp = s->odesc->nb_components;
+ outlink->sample_aspect_ratio = (AVRational){1,1};
+
+ return 0;
+}
+
+static int filter_frame(AVFilterLink *inlink, AVFrame *in)
+{
+ THistogramContext *s = inlink->dst->priv;
+ AVFilterContext *ctx = inlink->dst;
+ AVFilterLink *outlink = ctx->outputs[0];
+ int k, m;
+
+ if (!s->out) {
+ s->out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
+ if (!s->out) {
+ av_frame_free(&in);
+ return AVERROR(ENOMEM);
+ }
+
+ for (k = 0; k < 4 && s->out->data[k]; k++) {
+ const int is_chroma = (k == 1 || k == 2);
+ const int dst_h = AV_CEIL_RSHIFT(outlink->h, (is_chroma ?
s->odesc->log2_chroma_h : 0));
+ const int dst_w = AV_CEIL_RSHIFT(outlink->w, (is_chroma ?
s->odesc->log2_chroma_w : 0));
+
+ if (s->histogram_size <= 256) {
+ for (int i = 0; i < dst_h ; i++)
+ memset(s->out->data[s->odesc->comp[k].plane] +
+ i * s->out->linesize[s->odesc->comp[k].plane],
+ s->bg_color[k], dst_w);
+ } else {
+ const int mult = s->mult;
+
+ for (int i = 0; i < dst_h ; i++)
+ for (int j = 0; j < dst_w; j++)
+ AV_WN16(s->out->data[s->odesc->comp[k].plane] +
+ i * s->out->linesize[s->odesc->comp[k].plane]
+ j * 2,
+ s->bg_color[k] * mult);
+ }
+ }
+ }
+
+ for (m = 0, k = 0; k < s->ncomp; k++) {
+ const int p = s->desc->comp[k].plane;
+ const int height = s->planeheight[p];
+ const int width = s->planewidth[p];
+ double max_hval_log;
+ unsigned max_hval = 0;
+ int starty, startx;
+
+ if (!((1 << k) & s->components))
+ continue;
+ starty = m * s->histogram_size * (s->display_mode == 2);
+ startx = m++ * s->width * (s->display_mode == 1);
+
+ if (s->histogram_size <= 256) {
+ for (int i = 0; i < height; i++) {
+ const uint8_t *src = in->data[p] + i * in->linesize[p];
+ for (int j = 0; j < width; j++)
+ s->histogram[src[j]]++;
+ }
+ } else {
+ for (int i = 0; i < height; i++) {
+ const uint16_t *src = (const uint16_t *)(in->data[p] + i *
in->linesize[p]);
+ for (int j = 0; j < width; j++)
+ s->histogram[src[j]]++;
+ }
+ }
+
+ for (int i = 0; i < s->histogram_size; i++)
+ max_hval = FFMAX(max_hval, s->histogram[i]);
+ max_hval_log = log2(max_hval + 1);
+
+ for (int i = 0; i < s->histogram_size; i++) {
+ int idx = s->histogram_size - i - 1;
+ int value;
+
+ if (s->levels_mode)
+ value = lrint((s->histogram_size - 1) *
(log2(s->histogram[idx] + 1) / max_hval_log));
+ else
+ value = lrint((s->histogram_size - 1) * s->histogram[idx] /
(float)max_hval);
+
+ if (s->histogram_size <= 256) {
+ s->out->data[p][(i + starty) * s->out->linesize[p] + startx +
s->x_pos] = value;
+ } else {
+ AV_WN16(s->out->data[p] + (i + starty) * s->out->linesize[p] +
startx * 2 + s->x_pos * 2, value);
+ }
+ }
+
+ memset(s->histogram, 0, s->histogram_size * sizeof(unsigned));
+ }
+
+ s->out->pts = in->pts;
+
+ av_frame_free(&in);
+ s->x_pos++;
+ if (s->x_pos >= s->width)
+ s->x_pos = 0;
+
+ return ff_filter_frame(outlink, av_frame_clone(s->out));
+}
+
+static const AVFilterPad thistogram_inputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .filter_frame = filter_frame,
+ .config_props = config_input,
+ },
+ { NULL }
+};
+
+static const AVFilterPad thistogram_outputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .config_props = config_output,
+ },
+ { NULL }
+};
+
+AVFilter ff_vf_thistogram = {
+ .name = "thistogram",
+ .description = NULL_IF_CONFIG_SMALL("Compute and draw a temporal
histogram."),
+ .priv_size = sizeof(THistogramContext),
+ .query_formats = query_formats,
+ .inputs = thistogram_inputs,
+ .outputs = thistogram_outputs,
+ .priv_class = &thistogram_class,
+};
--
2.17.1
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