avfilter: add vibrance filter

4 files changed, 243 insertions, 1 deletions

diff --git a/libavfilter/Makefile b/libavfilter/Makefile
index 108a2f87d7..7beec310f8 100644
--- a/libavfilter/Makefile
+++ b/libavfilter/Makefile
@@ -394,6 +394,7 @@ 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 557590850b..6f1e7cfb7d 100644
--- a/libavfilter/allfilters.c
+++ b/libavfilter/allfilters.c
@@ -375,6 +375,7 @@ 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/version.h b/libavfilter/version.h
index 4e7ec97b2f..bf81e77a5c 100644
--- a/libavfilter/version.h
+++ b/libavfilter/version.h
@@ -30,7 +30,7 @@
 #include "libavutil/version.h"
 
 #define LIBAVFILTER_VERSION_MAJOR   7
-#define LIBAVFILTER_VERSION_MINOR  36
+#define LIBAVFILTER_VERSION_MINOR  37
 #define LIBAVFILTER_VERSION_MICRO 100
 
 #define LIBAVFILTER_VERSION_INT AV_VERSION_INT(LIBAVFILTER_VERSION_MAJOR, \
diff --git a/libavfilter/vf_vibrance.c b/libavfilter/vf_vibrance.c
new file mode 100644
index 0000000000..1e5bf26512
--- /dev/null
+++ b/libavfilter/vf_vibrance.c
@@ -0,0 +1,240 @@
+/*
+ * 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;
+    float balance[3];
+    float lcoeffs[3];
+
+    int depth;
+
+    int (*do_slice)(AVFilterContext *s, void *arg,
+                    int jobnr, int nb_jobs);
+} VibranceContext;
+
+static inline float lerpf(float v0, float v1, float f)
+{
+    return v0 + (v1 - v0) * f;
+}
+
+static int vibrance_slice8(AVFilterContext *avctx, void *arg, int jobnr, int nb_jobs)
+{
+    VibranceContext *s = avctx->priv;
+    AVFrame *frame = arg;
+    const int width = frame->width;
+    const int height = frame->height;
+    const float gc = s->lcoeffs[0];
+    const float bc = s->lcoeffs[1];
+    const float rc = s->lcoeffs[2];
+    const float intensity = s->intensity;
+    const float gintensity = intensity * s->balance[0];
+    const float bintensity = intensity * s->balance[1];
+    const float rintensity = intensity * s->balance[2];
+    const int slice_start = (height * jobnr) / nb_jobs;
+    const int slice_end = (height * (jobnr + 1)) / nb_jobs;
+    const int glinesize = frame->linesize[0];
+    const int blinesize = frame->linesize[1];
+    const int rlinesize = frame->linesize[2];
+    uint8_t *gptr = frame->data[0] + slice_start * glinesize;
+    uint8_t *bptr = frame->data[1] + slice_start * blinesize;
+    uint8_t *rptr = frame->data[2] + slice_start * rlinesize;
+
+    for (int y = slice_start; y < slice_end; y++) {
+        for (int x = 0; x < width; x++) {
+            float g = gptr[x] / 255.f;
+            float b = bptr[x] / 255.f;
+            float r = rptr[x] / 255.f;
+            float max_color = FFMAX3(r, g, b);
+            float min_color = FFMIN3(r, g, b);
+            float color_saturation = max_color - min_color;
+            float luma = g * gc + r * rc + b * bc;
+            const float cg = 1.f + gintensity * (1.f - FFSIGN(gintensity) * color_saturation);
+            const float cb = 1.f + bintensity * (1.f - FFSIGN(bintensity) * color_saturation);
+            const float cr = 1.f + rintensity * (1.f - FFSIGN(rintensity) * color_saturation);
+
+            g = lerpf(luma, g, cg);
+            b = lerpf(luma, b, cb);
+            r = lerpf(luma, r, cr);
+
+            gptr[x] = av_clip_uint8(g * 255.f);
+            bptr[x] = av_clip_uint8(b * 255.f);
+            rptr[x] = av_clip_uint8(r * 255.f);
+        }
+
+        gptr += glinesize;
+        bptr += blinesize;
+        rptr += rlinesize;
+    }
+
+    return 0;
+}
+
+static int vibrance_slice16(AVFilterContext *avctx, void *arg, int jobnr, int nb_jobs)
+{
+    VibranceContext *s = avctx->priv;
+    AVFrame *frame = arg;
+    const int depth = s->depth;
+    const float max = (1 << depth) - 1;
+    const float gc = s->lcoeffs[0];
+    const float bc = s->lcoeffs[1];
+    const float rc = s->lcoeffs[2];
+    const int width = frame->width;
+    const int height = frame->height;
+    const float intensity = s->intensity;
+    const float gintensity = intensity * s->balance[0];
+    const float bintensity = intensity * s->balance[1];
+    const float rintensity = intensity * s->balance[2];
+    const int slice_start = (height * jobnr) / nb_jobs;
+    const int slice_end = (height * (jobnr + 1)) / nb_jobs;
+    const int glinesize = frame->linesize[0] / 2;
+    const int blinesize = frame->linesize[1] / 2;
+    const int rlinesize = frame->linesize[2] / 2;
+    uint16_t *gptr = (uint16_t *)frame->data[0] + slice_start * glinesize;
+    uint16_t *bptr = (uint16_t *)frame->data[1] + slice_start * blinesize;
+    uint16_t *rptr = (uint16_t *)frame->data[2] + slice_start * rlinesize;
+
+    for (int y = slice_start; y < slice_end; y++) {
+        for (int x = 0; x < width; x++) {
+            float g = gptr[x] / max;
+            float b = bptr[x] / max;
+            float r = rptr[x] / max;
+            float max_color = FFMAX3(r, g, b);
+            float min_color = FFMIN3(r, g, b);
+            float color_saturation = max_color - min_color;
+            float luma = g * gc + r * rc + b * bc;
+            const float cg = 1.f + gintensity * (1.f - FFSIGN(gintensity) * color_saturation);
+            const float cb = 1.f + bintensity * (1.f - FFSIGN(bintensity) * color_saturation);
+            const float cr = 1.f + rintensity * (1.f - FFSIGN(rintensity) * color_saturation);
+
+            g = lerpf(luma, g, cg);
+            b = lerpf(luma, b, cb);
+            r = lerpf(luma, r, cr);
+
+            gptr[x] = av_clip_uintp2_c(g * max, depth);
+            bptr[x] = av_clip_uintp2_c(b * max, depth);
+            rptr[x] = av_clip_uintp2_c(r * max, depth);
+        }
+
+        gptr += glinesize;
+        bptr += blinesize;
+        rptr += rlinesize;
+    }
+
+    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_GBRP, AV_PIX_FMT_GBRAP,
+        AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10, AV_PIX_FMT_GBRP12,
+        AV_PIX_FMT_GBRP14, AV_PIX_FMT_GBRP16,
+        AV_PIX_FMT_GBRAP10, AV_PIX_FMT_GBRAP12, AV_PIX_FMT_GBRAP16,
+        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->depth = desc->comp[0].depth;
+    s->do_slice = s->depth <= 8 ? vibrance_slice8 : vibrance_slice16;
+
+    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 VF AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
+
+static const AVOption vibrance_options[] = {
+    { "intensity", "set the intensity value",   OFFSET(intensity),  AV_OPT_TYPE_FLOAT, {.dbl=0},       -2,  2, VF },
+    { "rbal", "set the red balance value",      OFFSET(balance[2]), AV_OPT_TYPE_FLOAT, {.dbl=1},      -10, 10, VF },
+    { "gbal", "set the green balance value",    OFFSET(balance[0]), AV_OPT_TYPE_FLOAT, {.dbl=1},      -10, 10, VF },
+    { "bbal", "set the blue balance value",     OFFSET(balance[1]), AV_OPT_TYPE_FLOAT, {.dbl=1},      -10, 10, VF },
+    { "rlum", "set the red luma coefficient",   OFFSET(lcoeffs[2]), AV_OPT_TYPE_FLOAT, {.dbl=0.072186}, 0,  1, VF },
+    { "glum", "set the green luma coefficient", OFFSET(lcoeffs[0]), AV_OPT_TYPE_FLOAT, {.dbl=0.715158}, 0,  1, VF },
+    { "blum", "set the blue luma coefficient",  OFFSET(lcoeffs[1]), AV_OPT_TYPE_FLOAT, {.dbl=0.212656}, 0,  1, VF },
+    { NULL }
+};
+
+AVFILTER_DEFINE_CLASS(vibrance);
+
+AVFilter ff_vf_vibrance = {
+    .name          = "vibrance",
+    .description   = NULL_IF_CONFIG_SMALL("Boost or alter 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,
+};