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diff --git a/third_party/jpeg-xl/lib/jxl/render_pipeline/stage_gaborish.h b/third_party/jpeg-xl/lib/jxl/render_pipeline/stage_gaborish.h
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index 0000000000..761800f668
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+++ b/third_party/jpeg-xl/lib/jxl/render_pipeline/stage_gaborish.h
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+// Copyright (c) the JPEG XL Project Authors. All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+#ifndef LIB_JXL_RENDER_PIPELINE_STAGE_GABORISH_H_
+#define LIB_JXL_RENDER_PIPELINE_STAGE_GABORISH_H_
+#include <math.h>
+#include <stdint.h>
+#include <stdio.h>
+
+#include <algorithm>
+#include <utility>
+#include <vector>
+
+#include "lib/jxl/loop_filter.h"
+#include "lib/jxl/render_pipeline/render_pipeline_stage.h"
+
+namespace jxl {
+
+// Applies decoder-side Gaborish with the given settings. `lf.gab` must be 1.
+std::unique_ptr<RenderPipelineStage> GetGaborishStage(const LoopFilter& lf);
+}  // namespace jxl
+
+#endif  // LIB_JXL_RENDER_PIPELINE_STAGE_GABORISH_H_