Signed-off-by: Paul B Mahol <one...@gmail.com>
---
libavfilter/Makefile | 1 +
libavfilter/allfilters.c | 1 +
libavfilter/vf_deband.c | 183 +++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 185 insertions(+)
create mode 100644 libavfilter/vf_deband.c
diff --git a/libavfilter/Makefile b/libavfilter/Makefile
index a623433..ea5c7c8 100644
--- a/libavfilter/Makefile
+++ b/libavfilter/Makefile
@@ -111,6 +111,7 @@ OBJS-$(CONFIG_CROP_FILTER) += vf_crop.o
OBJS-$(CONFIG_CROPDETECT_FILTER) += vf_cropdetect.o
OBJS-$(CONFIG_CURVES_FILTER) += vf_curves.o
OBJS-$(CONFIG_DCTDNOIZ_FILTER) += vf_dctdnoiz.o
+OBJS-$(CONFIG_DEBAND_FILTER) += vf_deband.o
OBJS-$(CONFIG_DECIMATE_FILTER) += vf_decimate.o
OBJS-$(CONFIG_DEJUDDER_FILTER) += vf_dejudder.o
OBJS-$(CONFIG_DELOGO_FILTER) += vf_delogo.o
diff --git a/libavfilter/allfilters.c b/libavfilter/allfilters.c
index ab0dc1d..5128708 100644
--- a/libavfilter/allfilters.c
+++ b/libavfilter/allfilters.c
@@ -127,6 +127,7 @@ void avfilter_register_all(void)
REGISTER_FILTER(CROPDETECT, cropdetect, vf);
REGISTER_FILTER(CURVES, curves, vf);
REGISTER_FILTER(DCTDNOIZ, dctdnoiz, vf);
+ REGISTER_FILTER(DEBAND, deband, vf);
REGISTER_FILTER(DECIMATE, decimate, vf);
REGISTER_FILTER(DEJUDDER, dejudder, vf);
REGISTER_FILTER(DELOGO, delogo, vf);
diff --git a/libavfilter/vf_deband.c b/libavfilter/vf_deband.c
new file mode 100644
index 0000000..4facb67
--- /dev/null
+++ b/libavfilter/vf_deband.c
@@ -0,0 +1,183 @@
+/*
+ * Copyright (c) 2015 Niklas Haas
+ * Copyright (c) 2015 Paul B Mahol
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE
+ * SOFTWARE.
+ */
+
+/*
+ * TODO: fix obvious bugs, 16bit support, slice threading
+ */
+
+#include "libavutil/opt.h"
+#include "libavutil/pixdesc.h"
+#include "avfilter.h"
+#include "internal.h"
+#include "video.h"
+
+typedef struct DebandContext {
+ const AVClass *class;
+
+ float threshold;
+ float range_x;
+ float range_y;
+ float direction;
+
+ int nb_components;
+ int planewidth[4];
+ int planeheight[4];
+ int subw, subh;
+} DebandContext;
+
+#define OFFSET(x) offsetof(DebandContext, x)
+#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
+
+static const AVOption deband_options[] = {
+ { "threshold", "set threshold", OFFSET(threshold), AV_OPT_TYPE_FLOAT,
{.dbl=0.04}, 0.0, 1.0, .flags = FLAGS },
+ { "range_x", "set x range", OFFSET(range_x), AV_OPT_TYPE_FLOAT,
{.dbl=0.05}, 0.0, 1.0, .flags = FLAGS },
+ { "range_y", "set y range", OFFSET(range_y), AV_OPT_TYPE_FLOAT,
{.dbl=0.05}, 0.0, 1.0, .flags = FLAGS },
+ { "direction", "set direction", OFFSET(direction), AV_OPT_TYPE_FLOAT,
{.dbl=0.00}, 0.0, 2 * M_PI, .flags = FLAGS },
+ { NULL }
+};
+
+AVFILTER_DEFINE_CLASS(deband);
+
+static int query_formats(AVFilterContext *ctx)
+{
+ static const enum AVPixelFormat pix_fmts[] = {
+ AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P,
+ AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P,
+ AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P,
+ AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUVJ440P,
+ AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA444P,
+ AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRAP,
+ AV_PIX_FMT_NONE
+ };
+ AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts);
+ if (!fmts_list)
+ return AVERROR(ENOMEM);
+
+ return ff_set_common_formats(ctx, fmts_list);
+}
+
+static int config_input(AVFilterLink *inlink)
+{
+ const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
+ AVFilterContext *ctx = inlink->dst;
+ DebandContext *s = ctx->priv;
+
+ s->nb_components = desc->nb_components;
+
+ s->planeheight[1] = s->planeheight[2] = FF_CEIL_RSHIFT(inlink->h,
desc->log2_chroma_h);
+ s->planeheight[0] = s->planeheight[3] = inlink->h;
+ s->planewidth[1] = s->planewidth[2] = FF_CEIL_RSHIFT(inlink->w,
desc->log2_chroma_w);
+ s->planewidth[0] = s->planewidth[3] = inlink->w;
+
+ s->subh = desc->log2_chroma_h;
+ s->subw = desc->log2_chroma_w;
+
+ return 0;
+}
+
+static float rand_dir(int x, int y)
+{
+ return sin(x * 12.9898 + y * 78.233) * 2 * M_PI;
+}
+
+static int get_avg(DebandContext *s, const uint8_t *src, int src_linesize,
+ int w, int h, int y, int x, float direction)
+{
+ const int x_pos = cos(direction) * s->range_x * w;
+ const int y_pos = sin(direction) * s->range_y * h;
+ int p0, p1, p2, p3;
+
+ p0 = src[av_clip(y + y_pos, 0, h - 1) * src_linesize + av_clip(x +
x_pos, 0, w - 1)];
+ p1 = src[av_clip(y + -y_pos, 0, h - 1) * src_linesize + av_clip(x +
x_pos, 0, w - 1)];
+ p2 = src[av_clip(y + -y_pos, 0, h - 1) * src_linesize + av_clip(x +
-x_pos, 0, w - 1)];
+ p3 = src[av_clip(y + y_pos, 0, h - 1) * src_linesize + av_clip(x +
-x_pos, 0, w - 1)];
+
+ return (p0 + p1 + p2 + p3) / 4;
+}
+
+static int filter_frame(AVFilterLink *inlink, AVFrame *in)
+{
+ AVFilterContext *ctx = inlink->dst;
+ AVFilterLink *outlink = ctx->outputs[0];
+ DebandContext *s = ctx->priv;
+ AVFrame *out;
+ const int thr = s->threshold * 255;
+ int x, y, p;
+
+ out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
+ if (!out)
+ return AVERROR(ENOMEM);
+ av_frame_copy_props(out, in);
+
+ for (p = 0; p < s->nb_components; p++) {
+ const uint8_t *src_ptr = (const uint8_t *)in->data[p];
+ uint8_t *dst_ptr = (uint8_t *)out->data[p];
+ const int dst_linesize = out->linesize[p];
+ const int src_linesize = in->linesize[p];
+
+ for (y = 0; y < s->planeheight[p]; y++) {
+ for (x = 0; x < s->planewidth[p]; x++) {
+ int dir = s->direction == 0 ? rand_dir(x, y): s->direction;
+ int avg = get_avg(s, src_ptr, src_linesize,
+ s->planewidth[p], s->planeheight[p],
+ y, x, dir);
+ int src0 = src_ptr[y * src_linesize + x];
+ int diff = FFABS(src0 - avg);
+
+ dst_ptr[y * dst_linesize + x] = diff < thr ? avg: src0;
+ }
+ }
+ }
+
+ av_frame_free(&in);
+ return ff_filter_frame(outlink, out);
+}
+
+static const AVFilterPad avfilter_vf_deband_inputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .config_props = config_input,
+ .filter_frame = filter_frame,
+ },
+ { NULL }
+};
+
+static const AVFilterPad avfilter_vf_deband_outputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ },
+ { NULL }
+};
+
+AVFilter ff_vf_deband = {
+ .name = "deband",
+ .description = NULL_IF_CONFIG_SMALL("Debands video."),
+ .priv_size = sizeof(DebandContext),
+ .priv_class = &deband_class,
+ .query_formats = query_formats,
+ .inputs = avfilter_vf_deband_inputs,
+ .outputs = avfilter_vf_deband_outputs,
+ .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
+};
--
1.7.11.2
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