[FFmpeg-devel] [PATCH] avfilter: add vibrance filter
Paul B Mahol
onemda at gmail.com
Fri Oct 19 22:27:58 EEST 2018
Signed-off-by: Paul B Mahol <onemda at gmail.com>
---
libavfilter/Makefile | 1 +
libavfilter/allfilters.c | 1 +
libavfilter/vf_vibrance.c | 169 ++++++++++++++++++++++++++++++++++++++
3 files changed, 171 insertions(+)
create mode 100644 libavfilter/vf_vibrance.c
diff --git a/libavfilter/Makefile b/libavfilter/Makefile
index 46c6023bcc..38fe649078 100644
--- a/libavfilter/Makefile
+++ b/libavfilter/Makefile
@@ -393,6 +393,7 @@ OBJS-$(CONFIG_VAGUEDENOISER_FILTER) += vf_vaguedenoiser.o
OBJS-$(CONFIG_VECTORSCOPE_FILTER) += vf_vectorscope.o
OBJS-$(CONFIG_VFLIP_FILTER) += vf_vflip.o
OBJS-$(CONFIG_VFRDET_FILTER) += vf_vfrdet.o
+OBJS-$(CONFIG_VIBRANCE_FILTER) += vf_vibrance.o
OBJS-$(CONFIG_VIDSTABDETECT_FILTER) += vidstabutils.o vf_vidstabdetect.o
OBJS-$(CONFIG_VIDSTABTRANSFORM_FILTER) += vidstabutils.o vf_vidstabtransform.o
OBJS-$(CONFIG_VIGNETTE_FILTER) += vf_vignette.o
diff --git a/libavfilter/allfilters.c b/libavfilter/allfilters.c
index 536765581b..2289efbb5b 100644
--- a/libavfilter/allfilters.c
+++ b/libavfilter/allfilters.c
@@ -374,6 +374,7 @@ extern AVFilter ff_vf_vaguedenoiser;
extern AVFilter ff_vf_vectorscope;
extern AVFilter ff_vf_vflip;
extern AVFilter ff_vf_vfrdet;
+extern AVFilter ff_vf_vibrance;
extern AVFilter ff_vf_vidstabdetect;
extern AVFilter ff_vf_vidstabtransform;
extern AVFilter ff_vf_vignette;
diff --git a/libavfilter/vf_vibrance.c b/libavfilter/vf_vibrance.c
new file mode 100644
index 0000000000..df07b914cb
--- /dev/null
+++ b/libavfilter/vf_vibrance.c
@@ -0,0 +1,169 @@
+/*
+ * Copyright (c) 2018 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/opt.h"
+#include "libavutil/imgutils.h"
+#include "avfilter.h"
+#include "formats.h"
+#include "internal.h"
+#include "video.h"
+
+typedef struct VibranceContext {
+ const AVClass *class;
+
+ float intensity;
+
+ int depth;
+ int planewidth[4];
+ int planeheight[4];
+
+ int (*do_slice)(AVFilterContext *s, void *arg,
+ int jobnr, int nb_jobs);
+} VibranceContext;
+
+static int vibrance_slice(AVFilterContext *avctx, void *arg, int jobnr, int nb_jobs)
+{
+ VibranceContext *s = avctx->priv;
+ AVFrame *frame = arg;
+ const float intensity = s->intensity;
+ const float abs_intensity = fabsf(intensity);
+ const float one_intensity = 1.f - abs_intensity;
+ const int slice_start = (s->planeheight[1] * jobnr) / nb_jobs;
+ const int slice_end = (s->planeheight[1] * (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;
+
+ for (int y = slice_start; y < slice_end; y++) {
+ for (int x = 0; x < s->planewidth[1]; x++) {
+ float saturation, target_saturation, hue;
+ int u = uptr[x] - 128;
+ int v = vptr[x] - 128;
+
+ saturation = hypotf(u, v) / 180.f;
+ if (intensity < 0) {
+ target_saturation = saturation * saturation;
+ } else {
+ target_saturation = sqrtf(saturation);
+ }
+ saturation = abs_intensity * target_saturation + one_intensity * saturation;
+ hue = atan2f(v, u);
+
+ uptr[x] = av_clip_uint8(floorf(128 + 180.f * saturation * cosf(hue)));
+ vptr[x] = av_clip_uint8(floorf(128 + 180.f * saturation * sinf(hue)));
+ }
+ uptr += ulinesize;
+ vptr += vlinesize;
+ }
+
+ return 0;
+}
+
+static int filter_frame(AVFilterLink *link, AVFrame *frame)
+{
+ AVFilterContext *avctx = link->dst;
+ VibranceContext *s = avctx->priv;
+ int res;
+
+ if (res = avctx->internal->execute(avctx, s->do_slice, frame, NULL,
+ FFMIN(frame->height, ff_filter_get_nb_threads(avctx))))
+ return res;
+
+ return ff_filter_frame(avctx->outputs[0], frame);
+}
+
+static av_cold int query_formats(AVFilterContext *avctx)
+{
+ static const enum AVPixelFormat pixel_fmts[] = {
+ AV_PIX_FMT_YUV420P,
+ AV_PIX_FMT_YUV422P,
+ AV_PIX_FMT_YUV444P,
+ AV_PIX_FMT_YUVA420P,
+ AV_PIX_FMT_YUVA422P,
+ AV_PIX_FMT_YUVA444P,
+ AV_PIX_FMT_NONE
+ };
+
+ AVFilterFormats *formats = NULL;
+
+ formats = ff_make_format_list(pixel_fmts);
+ if (!formats)
+ return AVERROR(ENOMEM);
+
+ return ff_set_common_formats(avctx, formats);
+}
+
+static av_cold int config_input(AVFilterLink *inlink)
+{
+ AVFilterContext *avctx = inlink->dst;
+ VibranceContext *s = avctx->priv;
+ const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
+
+ s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h);
+ s->planeheight[0] = s->planeheight[3] = inlink->h;
+ s->planewidth[1] = s->planewidth[2] = AV_CEIL_RSHIFT(inlink->w, desc->log2_chroma_w);
+ s->planewidth[0] = s->planewidth[3] = inlink->w;
+
+ s->depth = desc->comp[0].depth;
+ s->do_slice = vibrance_slice;
+
+ return 0;
+}
+
+static const AVFilterPad vibrance_inputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .needs_writable = 1,
+ .filter_frame = filter_frame,
+ .config_props = config_input,
+ },
+ { NULL }
+};
+
+static const AVFilterPad vibrance_outputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ },
+ { NULL }
+};
+
+#define OFFSET(x) offsetof(VibranceContext, x)
+#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
+
+static const AVOption vibrance_options[] = {
+ { "intensity", "set the vibrance intensity value", OFFSET(intensity), AV_OPT_TYPE_FLOAT, { .dbl = 0}, -1.0, 1.0, FLAGS },
+ { NULL }
+};
+
+AVFILTER_DEFINE_CLASS(vibrance);
+
+AVFilter ff_vf_vibrance = {
+ .name = "vibrance",
+ .description = NULL_IF_CONFIG_SMALL("Boost or cut saturation."),
+ .priv_size = sizeof(VibranceContext),
+ .priv_class = &vibrance_class,
+ .query_formats = query_formats,
+ .inputs = vibrance_inputs,
+ .outputs = vibrance_outputs,
+ .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS,
+};
--
2.17.1
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