@@ -13853,6 +13853,62 @@ If the specified expression is not valid, it is kept at its current
value.
@end table
+@section huesaturation
+Apply hue-saturation-intensity adjusments to input video stream.
+
+This filter operates in RGB colorspace.
+
+This filter accepts the following options:
+
+@table @option
+@item hue
+Set the hue shift in degrees to apply. Default is 0.
+Allowed range is from -180 to 180.
+
+@item saturation
+Set the saturation shift. Default is 0.
+Allowed range is from -1 to 1.
+
+@item intensity
+Set the intensity shift. Default is 0.
+Allowed range is from -1 to 1.
+
+@item colors
+Set which primary and complementary colors are going to be adjusted.
+This options is set by proving one or multiple values.
+This can select multiple colors at once. By default all colors are selected.
+@table @samp
+@item r
+Adjust reds.
+@item y
+Adjust yellows.
+@item g
+Adjust greens.
+@item c
+Adjust cyans.
+@item b
+Adjust blues.
+@item m
+Adjust magentas.
+@item a
+Adjust all colors.
+@end table
+
+@item strength
+Set strength of filtering. Allowed range is from 0 to 100.
+Default value is 1.
+
+@item rw, gw, bw
+Set weight for each RGB component. Allowed range is from 0 to 1.
+By default is set to 0.333, 0.334, 0.333.
+Those options are used in saturation and lightess processing.
+
+@item lightness
+Set preserving lightness, by default is disabled.
+Adjusting hues can change lightness from original RGB triplet,
+with this option enabled lightness is kept at same value.
+@end table
+
@section hysteresis
Grow first stream into second stream by connecting components.
@@ -307,6 +307,7 @@ OBJS-$(CONFIG_HSTACK_FILTER) += vf_stack.o framesync.o
OBJS-$(CONFIG_HSVHOLD_FILTER) += vf_hsvkey.o
OBJS-$(CONFIG_HSVKEY_FILTER) += vf_hsvkey.o
OBJS-$(CONFIG_HUE_FILTER) += vf_hue.o
+OBJS-$(CONFIG_HUESATURATION_FILTER) += vf_huesaturation.o
OBJS-$(CONFIG_HWDOWNLOAD_FILTER) += vf_hwdownload.o
OBJS-$(CONFIG_HWMAP_FILTER) += vf_hwmap.o
OBJS-$(CONFIG_HWUPLOAD_CUDA_FILTER) += vf_hwupload_cuda.o
@@ -292,6 +292,7 @@ extern const AVFilter ff_vf_hstack;
extern const AVFilter ff_vf_hsvhold;
extern const AVFilter ff_vf_hsvkey;
extern const AVFilter ff_vf_hue;
+extern const AVFilter ff_vf_huesaturation;
extern const AVFilter ff_vf_hwdownload;
extern const AVFilter ff_vf_hwmap;
extern const AVFilter ff_vf_hwupload;
new file mode 100644
@@ -0,0 +1,485 @@
+/*
+ * 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 "drawutils.h"
+#include "formats.h"
+#include "internal.h"
+#include "video.h"
+
+#define R 0
+#define G 1
+#define B 2
+
+#define REDS 0
+#define YELLOWS 1
+#define GREENS 2
+#define CYANS 3
+#define BLUES 4
+#define MAGENTAS 5
+
+#define RED (1 << REDS)
+#define YELLOW (1 << YELLOWS)
+#define GREEN (1 << GREENS)
+#define CYAN (1 << CYANS)
+#define BLUE (1 << BLUES)
+#define MAGENTA (1 << MAGENTAS)
+#define ALL 0x3F
+
+typedef struct HueSaturationContext {
+ const AVClass *class;
+
+ float hue;
+ float saturation;
+ float intensity;
+ float strength;
+ float rlw, glw, blw;
+ int lightness;
+ int colors;
+
+ int depth;
+ int planewidth[4];
+ int planeheight[4];
+
+ float matrix[4][4];
+ int64_t imatrix[4][4];
+
+ int bpp;
+ int step;
+ uint8_t rgba_map[4];
+
+ int (*do_slice[2])(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs);
+} HueSaturationContext;
+
+#define DENOM 0x10000
+
+static inline void get_triplet(int64_t m[4][4], int *r, int *g, int *b)
+{
+ const int ir = *r, ig = *g, ib = *b;
+
+ *r = (ir * m[0][0] + ig * m[1][0] + ib * m[2][0] /*+ m[3][0]*/) >> 16;
+ *g = (ir * m[0][1] + ig * m[1][1] + ib * m[2][1] /*+ m[3][1]*/) >> 16;
+ *b = (ir * m[0][2] + ig * m[1][2] + ib * m[2][2] /*+ m[3][2]*/) >> 16;
+}
+
+#define FAST_DIV255(x) ((((x) + 128) * 257) >> 16)
+
+static inline int lerpi8(int v0, int v1, int f, int max)
+{
+ return v0 + FAST_DIV255((v1 - v0) * f);
+}
+
+static inline int lerpi16(int v0, int v1, int f, int max)
+{
+ return v0 + (v1 - v0) * (int64_t)f / max;
+}
+
+#define HUESATURATION(name, type, clip, xall) \
+static int do_slice_##name##_##xall(AVFilterContext *ctx, \
+ void *arg, \
+ int jobnr, int nb_jobs) \
+{ \
+ HueSaturationContext *s = ctx->priv; \
+ AVFrame *frame = arg; \
+ const int imax = (1 << name) - 1; \
+ const float strength = s->strength; \
+ const int colors = s->colors; \
+ const int step = s->step; \
+ const int width = frame->width; \
+ const int process_h = frame->height; \
+ const int slice_start = (process_h * jobnr ) / nb_jobs; \
+ const int slice_end = (process_h * (jobnr+1)) / nb_jobs; \
+ const int linesize = frame->linesize[0] / sizeof(type); \
+ type *row = (type *)frame->data[0] + linesize * slice_start; \
+ const uint8_t offset_r = s->rgba_map[R]; \
+ const uint8_t offset_g = s->rgba_map[G]; \
+ const uint8_t offset_b = s->rgba_map[B]; \
+ type *dst_r = row + offset_r; \
+ type *dst_g = row + offset_g; \
+ type *dst_b = row + offset_b; \
+ \
+ for (int y = slice_start; y < slice_end; y++) { \
+ for (int x = 0; x < width * step; x += step) { \
+ int ir, ig, ib, ro, go, bo; \
+ \
+ ir = ro = dst_r[x]; \
+ ig = go = dst_g[x]; \
+ ib = bo = dst_b[x]; \
+ \
+ if (xall) { \
+ get_triplet(s->imatrix, &ir, &ig, &ib); \
+ } else { \
+ const int min = FFMIN3(ir, ig, ib); \
+ const int max = FFMAX3(ir, ig, ib); \
+ const int flags = (ir == max) << REDS \
+ | (ir == min) << CYANS \
+ | (ig == max) << GREENS \
+ | (ig == min) << MAGENTAS \
+ | (ib == max) << BLUES \
+ | (ib == min) << YELLOWS; \
+ if (colors & flags) { \
+ int f = 0; \
+ \
+ if (colors & RED) \
+ f = FFMAX(f, ir - FFMAX(ig, ib)); \
+ if (colors & YELLOW) \
+ f = FFMAX(f, FFMIN(ir, ig) - ib); \
+ if (colors & GREEN) \
+ f = FFMAX(f, ig - FFMAX(ir, ib)); \
+ if (colors & CYAN) \
+ f = FFMAX(f, FFMIN(ig, ib) - ir); \
+ if (colors & BLUE) \
+ f = FFMAX(f, ib - FFMAX(ir, ig)); \
+ if (colors & MAGENTA) \
+ f = FFMAX(f, FFMIN(ir, ib) - ig); \
+ f = FFMIN(f * strength, imax); \
+ get_triplet(s->imatrix, &ir, &ig, &ib); \
+ ir = lerpi##name(ro, ir, f, imax); \
+ ig = lerpi##name(go, ig, f, imax); \
+ ib = lerpi##name(bo, ib, f, imax); \
+ } \
+ } \
+ \
+ dst_r[x] = clip(ir); \
+ dst_g[x] = clip(ig); \
+ dst_b[x] = clip(ib); \
+ } \
+ \
+ dst_r += linesize; \
+ dst_g += linesize; \
+ dst_b += linesize; \
+ } \
+ \
+ return 0; \
+}
+
+HUESATURATION(8, uint8_t, av_clip_uint8, 0)
+HUESATURATION(16, uint16_t, av_clip_uint16, 0)
+
+HUESATURATION(8, uint8_t, av_clip_uint8, 1)
+HUESATURATION(16, uint16_t, av_clip_uint16, 1)
+
+static void identity_matrix(float matrix[4][4])
+{
+ for (int y = 0; y < 4; y++)
+ for (int x = 0; x < 4; x++)
+ matrix[y][x] = y == x;
+}
+
+static void matrix_multiply(float a[4][4], float b[4][4], float c[4][4])
+{
+ float temp[4][4];
+
+ for (int y = 0; y < 4; y++) {
+ for (int x = 0; x < 4; x++) {
+ temp[y][x] = b[y][0] * a[0][x]
+ + b[y][1] * a[1][x]
+ + b[y][2] * a[2][x]
+ + b[y][3] * a[3][x];
+ }
+ }
+
+ for (int y = 0; y < 4; y++) {
+ for (int x = 0; x < 4; x++)
+ c[y][x] = temp[y][x];
+ }
+}
+
+static void colorscale_matrix(float matrix[4][4], float r, float g, float b)
+{
+ float temp[4][4];
+
+ temp[0][0] = r; temp[0][1] = 0.f; temp[0][2] = 0.f; temp[0][3] = 0.f;
+ temp[1][0] = 0.f; temp[1][1] = g; temp[1][2] = 0.f; temp[1][3] = 0.f;
+ temp[2][0] = 0.f; temp[2][1] = 0.f; temp[2][2] = b; temp[2][3] = 0.f;
+ temp[3][0] = 0.f; temp[3][1] = 0.f; temp[3][2] = 0.f; temp[3][3] = 1.f;
+
+ matrix_multiply(temp, matrix, matrix);
+}
+
+static void saturation_matrix(float matrix[4][4], float saturation,
+ float rlw, float glw, float blw)
+{
+ float s = 1.f - saturation;
+ float a = s * rlw + saturation;
+ float b = s * rlw;
+ float c = s * rlw;
+ float d = s * glw;
+ float e = s * glw + saturation;
+ float f = s * glw;
+ float g = s * blw;
+ float h = s * blw;
+ float i = s * blw + saturation;
+ float m[4][4];
+
+ m[0][0] = a; m[0][1] = b; m[0][2] = c; m[0][3] = 0.f;
+ m[1][0] = d; m[1][1] = e; m[1][2] = f; m[1][3] = 0.f;
+ m[2][0] = g; m[2][1] = h; m[2][2] = i; m[2][3] = 0.f;
+ m[3][0] = 0.f; m[3][1] = 0.f; m[3][2] = 0.f; m[3][3] = 1.f;
+
+ matrix_multiply(m, matrix, matrix);
+}
+
+static void matrix2imatrix(float matrix[4][4], int64_t imatrix[4][4])
+{
+ for (int y = 0; y < 4; y++)
+ for (int x = 0; x < 4; x++)
+ imatrix[y][x] = lrintf(matrix[y][x] * DENOM);
+}
+
+static void x_rotate_matrix(float matrix[4][4], float rs, float rc)
+{
+ float m[4][4];
+
+ m[0][0] = 1.f; m[0][1] = 0.f; m[0][2] = 0.f; m[0][3] = 0.f;
+ m[1][0] = 0.f; m[1][1] = rc; m[1][2] = rs; m[1][3] = 0.f;
+ m[2][0] = 0.f; m[2][1] = -rs; m[2][2] = rc; m[2][3] = 0.f;
+ m[3][0] = 0.f; m[3][1] = 0.f; m[3][2] = 0.f; m[3][3] = 1.f;
+
+ matrix_multiply(m, matrix, matrix);
+}
+
+static void y_rotate_matrix(float matrix[4][4], float rs, float rc)
+{
+ float m[4][4];
+
+ m[0][0] = rc; m[0][1] = 0.f; m[0][2] = -rs; m[0][3] = 0.f;
+ m[1][0] = 0.f; m[1][1] = 1.f; m[1][2] = 0.f; m[1][3] = 0.f;
+ m[2][0] = rs; m[2][1] = 0.f; m[2][2] = rc; m[2][3] = 0.f;
+ m[3][0] = 0.f; m[3][1] = 0.f; m[3][2] = 0.f; m[3][3] = 1.f;
+
+ matrix_multiply(m, matrix, matrix);
+}
+
+static void z_rotate_matrix(float matrix[4][4], float rs, float rc)
+{
+ float m[4][4];
+
+ m[0][0] = rc; m[0][1] = rs; m[0][2] = 0.f; m[0][3] = 0.f;
+ m[1][0] = -rs; m[1][1] = rc; m[1][2] = 0.f; m[1][3] = 0.f;
+ m[2][0] = 0.f; m[2][1] = 0.f; m[2][2] = 1.f; m[2][3] = 0.f;
+ m[3][0] = 0.f; m[3][1] = 0.f; m[3][2] = 0.f; m[3][3] = 1.f;
+
+ matrix_multiply(m, matrix, matrix);
+}
+
+static void z_shear_matrix(float matrix[4][4], float dx, float dy)
+{
+ float m[4][4];
+
+ m[0][0] = 1.f; m[0][1] = 0.f; m[0][2] = dx; m[0][3] = 0.f;
+ m[1][0] = 0.f; m[1][1] = 1.f; m[1][2] = dy; m[1][3] = 0.f;
+ m[2][0] = 0.f; m[2][1] = 0.f; m[2][2] = 1.f; m[2][3] = 0.f;
+ m[3][0] = 0.f; m[3][1] = 0.f; m[3][2] = 0.f; m[3][3] = 1.f;
+
+ matrix_multiply(m, matrix, matrix);
+}
+
+static void transform_point(float matrix[4][4],
+ float x, float y, float z,
+ float *tx, float *ty, float *tz)
+{
+ x = y;
+ *tx = x;
+ *tx = x * matrix[0][0] + y * matrix[1][0] + z * matrix[2][0] + matrix[3][0];
+ *ty = x * matrix[0][1] + y * matrix[1][1] + z * matrix[2][1] + matrix[3][1];
+ *tz = x * matrix[0][2] + y * matrix[1][2] + z * matrix[2][2] + matrix[3][2];
+}
+
+static void hue_rotate_matrix(float matrix[4][4], float rotation,
+ float rlw, float glw, float blw)
+{
+ float mag, lx, ly, lz;
+ float xrs, xrc;
+ float yrs, yrc;
+ float zrs, zrc;
+ float zsx, zsy;
+
+ mag = M_SQRT2;
+ xrs = 1.f / mag;
+ xrc = 1.f / mag;
+ x_rotate_matrix(matrix, xrs, xrc);
+
+ mag = sqrtf(3.f);
+ yrs = -1.f / mag;
+ yrc = M_SQRT2 / mag;
+ y_rotate_matrix(matrix, yrs, yrc);
+
+ transform_point(matrix, rlw, glw, blw, &lx, &ly, &lz);
+ zsx = lx / lz;
+ zsy = ly / lz;
+ z_shear_matrix(matrix, zsx, zsy);
+
+ zrs = sinf(rotation * M_PI / 180.f);
+ zrc = cosf(rotation * M_PI / 180.f);
+ z_rotate_matrix(matrix, zrs, zrc);
+
+ z_shear_matrix(matrix, -zsx, -zsy);
+
+ y_rotate_matrix(matrix, -yrs, yrc);
+ x_rotate_matrix(matrix, -xrs, xrc);
+}
+
+static void shue_rotate_matrix(float m[4][4], float rotation)
+{
+ float xrs, xrc, yrs, yrc, zrs, zrc, mag;
+
+ mag = M_SQRT2;
+ xrs = 1.f / mag;
+ xrc = 1.f / mag;
+ x_rotate_matrix(m, xrs, xrc);
+
+ mag = sqrtf(3.f);
+ yrs = -1.f / mag;
+ yrc = M_SQRT2 / mag;
+ y_rotate_matrix(m, yrs, yrc);
+
+ zrs = sinf(rotation * M_PI / 180.f);
+ zrc = cosf(rotation * M_PI / 180.f);
+ z_rotate_matrix(m, zrs, zrc);
+
+ y_rotate_matrix(m, -yrs, yrc);
+ x_rotate_matrix(m, -xrs, xrc);
+}
+
+static void init_matrix(HueSaturationContext *s)
+{
+ float i = 1.f + s->intensity;
+ float saturation = 1.f + s->saturation;
+ float hue = s->hue;
+
+ identity_matrix(s->matrix);
+ colorscale_matrix(s->matrix, i, i, i);
+ saturation_matrix(s->matrix, saturation,
+ s->rlw, s->glw, s->blw);
+
+ if (s->lightness)
+ hue_rotate_matrix(s->matrix, hue,
+ s->rlw, s->glw, s->blw);
+ else
+ shue_rotate_matrix(s->matrix, hue);
+
+ matrix2imatrix(s->matrix, s->imatrix);
+}
+
+static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
+{
+ AVFilterContext *ctx = inlink->dst;
+ HueSaturationContext *s = ctx->priv;
+
+ init_matrix(s);
+
+ ff_filter_execute(ctx, s->do_slice[(s->strength >= 99.f) && (s->colors == ALL)], 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_RGB24, AV_PIX_FMT_BGR24,
+ AV_PIX_FMT_RGBA, AV_PIX_FMT_BGRA,
+ AV_PIX_FMT_ABGR, AV_PIX_FMT_ARGB,
+ AV_PIX_FMT_0BGR, AV_PIX_FMT_0RGB,
+ AV_PIX_FMT_RGB0, AV_PIX_FMT_BGR0,
+ AV_PIX_FMT_RGB48, AV_PIX_FMT_BGR48,
+ AV_PIX_FMT_RGBA64, AV_PIX_FMT_BGRA64,
+ AV_PIX_FMT_NONE
+ };
+
+ return ff_set_common_formats_from_list(ctx, pixel_fmts);
+}
+
+static av_cold int config_input(AVFilterLink *inlink)
+{
+ AVFilterContext *ctx = inlink->dst;
+ HueSaturationContext *s = ctx->priv;
+ const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
+
+ s->depth = desc->comp[0].depth;
+ s->bpp = s->depth >> 3;
+ s->step = av_get_padded_bits_per_pixel(desc) >> (3 + (s->bpp == 2));
+ ff_fill_rgba_map(s->rgba_map, inlink->format);
+
+ 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_slice[0] = s->depth <= 8 ? do_slice_8_0 : do_slice_16_0;
+ s->do_slice[1] = s->depth <= 8 ? do_slice_8_1 : do_slice_16_1;
+
+ return 0;
+}
+
+static const AVFilterPad huesaturation_inputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .flags = AVFILTERPAD_FLAG_NEEDS_WRITABLE,
+ .filter_frame = filter_frame,
+ .config_props = config_input,
+ },
+};
+
+static const AVFilterPad huesaturation_outputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ },
+};
+
+#define OFFSET(x) offsetof(HueSaturationContext, x)
+#define VF AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_RUNTIME_PARAM
+
+static const AVOption huesaturation_options[] = {
+ { "hue", "set the hue shift", OFFSET(hue), AV_OPT_TYPE_FLOAT, {.dbl=0},-180, 180, VF },
+ { "saturation", "set the saturation shift", OFFSET(saturation), AV_OPT_TYPE_FLOAT, {.dbl=0}, -1, 1, VF },
+ { "intensity", "set the intensity shift", OFFSET(intensity), AV_OPT_TYPE_FLOAT, {.dbl=0}, -1, 1, VF },
+ { "colors", "set colors range", OFFSET(colors), AV_OPT_TYPE_FLAGS, {.i64=ALL}, 0,ALL,VF, "colors" },
+ { "r", "set reds", 0, AV_OPT_TYPE_CONST, {.i64=RED}, 0, 0, VF, "colors" },
+ { "y", "set yellows", 0, AV_OPT_TYPE_CONST, {.i64=YELLOW}, 0, 0, VF, "colors" },
+ { "g", "set greens", 0, AV_OPT_TYPE_CONST, {.i64=GREEN}, 0, 0, VF, "colors" },
+ { "c", "set cyans", 0, AV_OPT_TYPE_CONST, {.i64=CYAN}, 0, 0, VF, "colors" },
+ { "b", "set blues", 0, AV_OPT_TYPE_CONST, {.i64=BLUE}, 0, 0, VF, "colors" },
+ { "m", "set magentas", 0, AV_OPT_TYPE_CONST, {.i64=MAGENTA}, 0, 0, VF, "colors" },
+ { "a", "set all colors", 0, AV_OPT_TYPE_CONST, {.i64=ALL}, 0, 0, VF, "colors" },
+ { "strength", "set the filtering strength", OFFSET(strength), AV_OPT_TYPE_FLOAT, {.dbl=1}, 0,100,VF },
+ { "rw", "set the red weight", OFFSET(rlw), AV_OPT_TYPE_FLOAT, {.dbl=.333}, 0, 1, VF },
+ { "gw", "set the green weight", OFFSET(glw), AV_OPT_TYPE_FLOAT, {.dbl=.334}, 0, 1, VF },
+ { "bw", "set the blue weight", OFFSET(blw), AV_OPT_TYPE_FLOAT, {.dbl=.333}, 0, 1, VF },
+ { "lightness", "set the preserve lightness", OFFSET(lightness), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, VF },
+ { NULL }
+};
+
+AVFILTER_DEFINE_CLASS(huesaturation);
+
+const AVFilter ff_vf_huesaturation = {
+ .name = "huesaturation",
+ .description = NULL_IF_CONFIG_SMALL("Apply hue-saturation-intensity adjustments."),
+ .priv_size = sizeof(HueSaturationContext),
+ .priv_class = &huesaturation_class,
+ .query_formats = query_formats,
+ FILTER_INPUTS(huesaturation_inputs),
+ FILTER_OUTPUTS(huesaturation_outputs),
+ .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS,
+ .process_command = ff_filter_process_command,
+};
Signed-off-by: Paul B Mahol <onemda@gmail.com> --- doc/filters.texi | 56 ++++ libavfilter/Makefile | 1 + libavfilter/allfilters.c | 1 + libavfilter/vf_huesaturation.c | 485 +++++++++++++++++++++++++++++++++ 4 files changed, 543 insertions(+) create mode 100644 libavfilter/vf_huesaturation.c