[FFmpeg-devel] [PATCH] avfilter: add colorize filter
Paul B Mahol
onemda at gmail.com
Thu Feb 4 18:50:11 EET 2021
Signed-off-by: Paul B Mahol <onemda at gmail.com>
---
doc/filters.texi | 27 ++++
libavfilter/Makefile | 1 +
libavfilter/allfilters.c | 1 +
libavfilter/vf_colorize.c | 306 ++++++++++++++++++++++++++++++++++++++
4 files changed, 335 insertions(+)
create mode 100644 libavfilter/vf_colorize.c
diff --git a/doc/filters.texi b/doc/filters.texi
index 52bced3143..c4aa31a91c 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -8163,6 +8163,33 @@ colorchannelmixer=.393:.769:.189:0:.349:.686:.168:0:.272:.534:.131
This filter supports the all above options as @ref{commands}.
+ at section colorize
+Overlay a solid color on the video stream.
+
+The filter accepts the following options:
+
+ at table @option
+ at item hue
+Set the color hue. Allowed range is from 0 to 360.
+Default value is 0.
+
+ at item saturation
+Set the color saturation. Allowed range is from 0 to 1.
+Default value is 0.5.
+
+ at item lightness
+Set the color lightness. Allowed range is from 0 to 1.
+Default value is 0.5.
+
+ at item mix
+Set the mix of source lightness. By default is set to 1.0.
+Allowed range is from 0.0 to 1.0.
+ at end table
+
+ at subsection Commands
+
+This filter supports the all above options as @ref{commands}.
+
@section colorkey
RGB colorspace color keying.
diff --git a/libavfilter/Makefile b/libavfilter/Makefile
index 68ff8e26d2..e26f181d21 100644
--- a/libavfilter/Makefile
+++ b/libavfilter/Makefile
@@ -198,6 +198,7 @@ OBJS-$(CONFIG_COLORBALANCE_FILTER) += vf_colorbalance.o
OBJS-$(CONFIG_COLORCHANNELMIXER_FILTER) += vf_colorchannelmixer.o
OBJS-$(CONFIG_COLORCONTRAST_FILTER) += vf_colorcontrast.o
OBJS-$(CONFIG_COLORCORRECT_FILTER) += vf_colorcorrect.o
+OBJS-$(CONFIG_COLORIZE_FILTER) += vf_colorize.o
OBJS-$(CONFIG_COLORKEY_FILTER) += vf_colorkey.o
OBJS-$(CONFIG_COLORKEY_OPENCL_FILTER) += vf_colorkey_opencl.o opencl.o \
opencl/colorkey.o
diff --git a/libavfilter/allfilters.c b/libavfilter/allfilters.c
index 3b4620a5d7..53d7063d54 100644
--- a/libavfilter/allfilters.c
+++ b/libavfilter/allfilters.c
@@ -188,6 +188,7 @@ extern AVFilter ff_vf_colorbalance;
extern AVFilter ff_vf_colorchannelmixer;
extern AVFilter ff_vf_colorcontrast;
extern AVFilter ff_vf_colorcorrect;
+extern AVFilter ff_vf_colorize;
extern AVFilter ff_vf_colorkey;
extern AVFilter ff_vf_colorkey_opencl;
extern AVFilter ff_vf_colorhold;
diff --git a/libavfilter/vf_colorize.c b/libavfilter/vf_colorize.c
new file mode 100644
index 0000000000..e9d348201d
--- /dev/null
+++ b/libavfilter/vf_colorize.c
@@ -0,0 +1,306 @@
+/*
+ * 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/imgutils.h"
+#include "avfilter.h"
+#include "formats.h"
+#include "internal.h"
+#include "video.h"
+
+typedef struct ColorizeContext {
+ const AVClass *class;
+
+ float hue;
+ float saturation;
+ float lightness;
+ float mix;
+
+ int depth;
+ int c[3];
+ int planewidth[4];
+ int planeheight[4];
+
+ int (*do_plane_slice[2])(AVFilterContext *s, void *arg,
+ int jobnr, int nb_jobs);
+} ColorizeContext;
+
+static inline float lerpf(float v0, float v1, float f)
+{
+ return v0 + (v1 - v0) * f;
+}
+
+static int colorizey_slice8(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
+{
+ ColorizeContext *s = ctx->priv;
+ AVFrame *frame = arg;
+ const int width = s->planewidth[0];
+ const int height = s->planeheight[0];
+ const int slice_start = (height * jobnr) / nb_jobs;
+ const int slice_end = (height * (jobnr + 1)) / nb_jobs;
+ const int ylinesize = frame->linesize[0];
+ uint8_t *yptr = frame->data[0] + slice_start * ylinesize;
+ const int yv = s->c[0];
+ const float mix = s->mix;
+
+ for (int y = slice_start; y < slice_end; y++) {
+ for (int x = 0; x < width; x++)
+ yptr[x] = lerpf(yv, yptr[x], mix);
+
+ yptr += ylinesize;
+ }
+
+ return 0;
+}
+
+static int colorizey_slice16(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
+{
+ ColorizeContext *s = ctx->priv;
+ AVFrame *frame = arg;
+ const int width = s->planewidth[0];
+ const int height = s->planeheight[0];
+ const int slice_start = (height * jobnr) / nb_jobs;
+ const int slice_end = (height * (jobnr + 1)) / nb_jobs;
+ const int ylinesize = frame->linesize[0] / 2;
+ uint16_t *yptr = (uint16_t *)frame->data[0] + slice_start * ylinesize;
+ const int yv = s->c[0];
+ const float mix = s->mix;
+
+ for (int y = slice_start; y < slice_end; y++) {
+ for (int x = 0; x < width; x++)
+ yptr[x] = lerpf(yv, yptr[x], mix);
+
+ yptr += ylinesize;
+ }
+
+ return 0;
+}
+
+static int colorize_slice8(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
+{
+ ColorizeContext *s = ctx->priv;
+ AVFrame *frame = arg;
+ const int width = s->planewidth[1];
+ const int height = s->planeheight[1];
+ const int slice_start = (height * jobnr) / nb_jobs;
+ const int slice_end = (height * (jobnr + 1)) / nb_jobs;
+ const int ulinesize = frame->linesize[1];
+ const int vlinesize = frame->linesize[2];
+ uint8_t *uptr = frame->data[1] + slice_start * ulinesize;
+ uint8_t *vptr = frame->data[2] + slice_start * vlinesize;
+ const int u = s->c[1];
+ const int v = s->c[2];
+
+ for (int y = slice_start; y < slice_end; y++) {
+ for (int x = 0; x < width; x++) {
+ uptr[x] = u;
+ vptr[x] = v;
+ }
+
+ uptr += ulinesize;
+ vptr += vlinesize;
+ }
+
+ return 0;
+}
+
+static int colorize_slice16(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
+{
+ ColorizeContext *s = ctx->priv;
+ AVFrame *frame = arg;
+ const int width = s->planewidth[1];
+ const int height = s->planeheight[1];
+ const int slice_start = (height * jobnr) / nb_jobs;
+ const int slice_end = (height * (jobnr + 1)) / nb_jobs;
+ const int ulinesize = frame->linesize[1] / 2;
+ const int vlinesize = frame->linesize[2] / 2;
+ uint16_t *uptr = (uint16_t *)frame->data[1] + slice_start * ulinesize;
+ uint16_t *vptr = (uint16_t *)frame->data[2] + slice_start * vlinesize;
+ const int u = s->c[1];
+ const int v = s->c[2];
+
+ for (int y = slice_start; y < slice_end; y++) {
+ for (int x = 0; x < width; x++) {
+ uptr[x] = u;
+ vptr[x] = v;
+ }
+
+ uptr += ulinesize;
+ vptr += vlinesize;
+ }
+
+ return 0;
+}
+
+static int do_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
+{
+ ColorizeContext *s = ctx->priv;
+
+ s->do_plane_slice[0](ctx, arg, jobnr, nb_jobs);
+ s->do_plane_slice[1](ctx, arg, jobnr, nb_jobs);
+
+ return 0;
+}
+
+static float hue2rgb(float p, float q, float t)
+{
+ if (t < 0.f) t += 1.f;
+ if (t > 1.f) t -= 1.f;
+ if (t < 1.f/6.f) return p + (q - p) * 6.f * t;
+ if (t < 1.f/2.f) return q;
+ if (t < 2.f/3.f) return p + (q - p) * (2.f/3.f - t) * 6.f;
+
+ return p;
+}
+
+static void hsl2rgb(float h, float s, float l, float *r, float *g, float *b)
+{
+ h /= 360.f;
+
+ if (s == 0.f) {
+ *r = *g = *b = l;
+ } else {
+ const float q = l < 0.5f ? l * (1.f + s) : l + s - l * s;
+ const float p = 2.f * l - q;
+
+ *r = hue2rgb(p, q, h + 1.f / 3.f);
+ *g = hue2rgb(p, q, h);
+ *b = hue2rgb(p, q, h - 1.f / 3.f);
+ }
+}
+
+static void rgb2yuv(float r, float g, float b, int *y, int *u, int *v, int depth)
+{
+ *y = ((0.21260*219.0/255.0) * r + (0.71520*219.0/255.0) * g +
+ (0.07220*219.0/255.0) * b) * ((1 << depth) - 1);
+ *u = (-(0.11457*224.0/255.0) * r - (0.38543*224.0/255.0) * g +
+ (0.50000*224.0/255.0) * b + 0.5) * ((1 << depth) - 1);
+ *v = ((0.50000*224.0/255.0) * r - (0.45415*224.0/255.0) * g -
+ (0.04585*224.0/255.0) * b + 0.5) * ((1 << depth) - 1);
+}
+
+static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
+{
+ AVFilterContext *ctx = inlink->dst;
+ ColorizeContext *s = ctx->priv;
+ float c[3];
+
+ hsl2rgb(s->hue, s->saturation, s->lightness, &c[0], &c[1], &c[2]);
+ rgb2yuv(c[0], c[1], c[2], &s->c[0], &s->c[1], &s->c[2], s->depth);
+
+ ctx->internal->execute(ctx, do_slice, frame, NULL,
+ FFMIN(s->planeheight[1], ff_filter_get_nb_threads(ctx)));
+
+ return ff_filter_frame(ctx->outputs[0], frame);
+}
+
+static av_cold int query_formats(AVFilterContext *ctx)
+{
+ static const enum AVPixelFormat pixel_fmts[] = {
+ AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV411P,
+ AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P,
+ AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV444P,
+ AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P,
+ AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_YUVJ444P,
+ AV_PIX_FMT_YUVJ411P,
+ AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9,
+ AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10,
+ AV_PIX_FMT_YUV440P10,
+ AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV420P12,
+ AV_PIX_FMT_YUV440P12,
+ AV_PIX_FMT_YUV444P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV420P14,
+ AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
+ AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA444P,
+ AV_PIX_FMT_YUVA444P9, AV_PIX_FMT_YUVA444P10, AV_PIX_FMT_YUVA444P12, AV_PIX_FMT_YUVA444P16,
+ AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA422P12, AV_PIX_FMT_YUVA422P16,
+ AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA420P16,
+ AV_PIX_FMT_NONE
+ };
+
+ AVFilterFormats *formats = NULL;
+
+ formats = ff_make_format_list(pixel_fmts);
+ if (!formats)
+ return AVERROR(ENOMEM);
+
+ return ff_set_common_formats(ctx, formats);
+}
+
+static av_cold int config_input(AVFilterLink *inlink)
+{
+ AVFilterContext *ctx = inlink->dst;
+ ColorizeContext *s = ctx->priv;
+ const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
+ int depth;
+
+ s->depth = depth = desc->comp[0].depth;
+
+ s->planewidth[1] = s->planewidth[2] = AV_CEIL_RSHIFT(inlink->w, desc->log2_chroma_w);
+ s->planewidth[0] = s->planewidth[3] = inlink->w;
+ s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h);
+ s->planeheight[0] = s->planeheight[3] = inlink->h;
+
+ s->do_plane_slice[0] = depth <= 8 ? colorizey_slice8 : colorizey_slice16;
+ s->do_plane_slice[1] = depth <= 8 ? colorize_slice8 : colorize_slice16;
+
+ return 0;
+}
+
+static const AVFilterPad colorize_inputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .needs_writable = 1,
+ .filter_frame = filter_frame,
+ .config_props = config_input,
+ },
+ { NULL }
+};
+
+static const AVFilterPad colorize_outputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ },
+ { NULL }
+};
+
+#define OFFSET(x) offsetof(ColorizeContext, x)
+#define VF AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_RUNTIME_PARAM
+
+static const AVOption colorize_options[] = {
+ { "hue", "set the hue", OFFSET(hue), AV_OPT_TYPE_FLOAT, {.dbl=0}, 0, 360, VF },
+ { "saturation", "set the saturation", OFFSET(saturation), AV_OPT_TYPE_FLOAT, {.dbl=0.5},0, 1, VF },
+ { "lightness", "set the lightness", OFFSET(lightness), AV_OPT_TYPE_FLOAT, {.dbl=0.5},0, 1, VF },
+ { "mix", "set the mix of source lightness", OFFSET(mix), AV_OPT_TYPE_FLOAT, {.dbl=1}, 0, 1, VF },
+ { NULL }
+};
+
+AVFILTER_DEFINE_CLASS(colorize);
+
+AVFilter ff_vf_colorize = {
+ .name = "colorize",
+ .description = NULL_IF_CONFIG_SMALL("Overlay a solid color on the video stream."),
+ .priv_size = sizeof(ColorizeContext),
+ .priv_class = &colorize_class,
+ .query_formats = query_formats,
+ .inputs = colorize_inputs,
+ .outputs = colorize_outputs,
+ .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS,
+ .process_command = ff_filter_process_command,
+};
--
2.17.1
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