avfilter: add median filter

1 files changed, 54 insertions, 0 deletions

diff --git a/libavfilter/median.h b/libavfilter/median.h
new file mode 100644
index 0000000000..bb07fddd5d
--- /dev/null
+++ b/libavfilter/median.h
@@ -0,0 +1,54 @@
+/*
+ * Copyright (c) 2019 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
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ */
+
+#ifndef AVFILTER_MEDIAN_H
+#define AVFILTER_MEDIAN_H
+
+#include "avfilter.h"
+
+typedef struct MedianContext {
+    const AVClass *class;
+
+    int planes;
+    int radius;
+
+    int planewidth[4];
+    int planeheight[4];
+    int depth;
+    int nb_planes;
+    int nb_threads;
+
+    uint16_t **coarse, **fine;
+    int coarse_size, fine_size;
+    int bins;
+    int t;
+
+    void (*hadd)(uint16_t *dst, const uint16_t *src, int bins);
+    void (*hsub)(uint16_t *dst, const uint16_t *src, int bins);
+    void (*hmuladd)(uint16_t *dst, const uint16_t *src, int f, int bins);
+
+    void (*filter_plane)(AVFilterContext *ctx, const uint8_t *ssrc, int src_linesize,
+                         uint8_t *ddst, int dst_linesize, int width, int height,
+                         int slice_h_start, int slice_h_end, int jobnr);
+} MedianContext;
+
+#endif