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diff --git a/media/libjxl/src/tools/djxl.h b/media/libjxl/src/tools/djxl.h
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+++ b/media/libjxl/src/tools/djxl.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 TOOLS_DJXL_H_
+#define TOOLS_DJXL_H_
+
+#include <stddef.h>
+
+#include <thread>
+
+#include "jxl/decode.h"
+#include "lib/jxl/aux_out.h"
+#include "lib/jxl/base/data_parallel.h"
+#include "lib/jxl/base/override.h"
+#include "lib/jxl/base/padded_bytes.h"
+#include "lib/jxl/base/status.h"
+#include "lib/jxl/codec_in_out.h"
+#include "lib/jxl/dec_params.h"
+#include "tools/args.h"
+#include "tools/box/box.h"
+#include "tools/cmdline.h"
+#include "tools/speed_stats.h"
+
+namespace jpegxl {
+namespace tools {
+
+// Common JPEG XL decompress arguments.
+struct DecompressArgs {
+  // Initialize non-static default options.
+  DecompressArgs() = default;
+
+  // Add all the command line options to the CommandLineParser. Note that the
+  // options are tied to the instance that this was called on.
+  void AddCommandLineOptions(CommandLineParser* cmdline);
+
+  // Validate the passed arguments, checking whether all passed options are
+  // compatible. Returns whether the validation was successful.
+  jxl::Status ValidateArgs(const CommandLineParser& cmdline);
+
+  // Common djxl parameters.
+  const char* file_in = nullptr;
+  const char* file_out = nullptr;
+  size_t num_threads = std::thread::hardware_concurrency();
+  bool use_sjpeg = false;
+  size_t jpeg_quality = 95;
+  bool decode_to_pixels = false;
+  bool version = false;
+  jxl::Override print_profile = jxl::Override::kDefault;
+
+  size_t num_reps = 1;
+
+  // Format parameters:
+
+  size_t bits_per_sample = 0;
+  bool tone_map = false;
+  std::pair<float, float> display_nits = {0.f, jxl::kDefaultIntensityTarget};
+  float preserve_saturation = .1f;
+  std::string color_space;  // description or path to ICC profile
+
+  jxl::DecompressParams params;
+
+  // If true, print the effective amount of bytes read from the bitstream.
+  bool print_read_bytes = false;
+  bool quiet = false;
+
+  // References (ids) of specific options to check if they were matched.
+  CommandLineParser::OptionId opt_jpeg_quality_id = -1;
+};
+
+// Decompresses and notifies SpeedStats of elapsed time.
+jxl::Status DecompressJxlToPixels(const jxl::Span<const uint8_t> compressed,
+                                  const jxl::DecompressParams& params,
+                                  jxl::ThreadPool* pool,
+                                  jxl::CodecInOut* JXL_RESTRICT io,
+                                  SpeedStats* JXL_RESTRICT stats);
+
+jxl::Status DecompressJxlToJPEG(const JpegXlContainer& container,
+                                const DecompressArgs& args,
+                                jxl::ThreadPool* pool, jxl::PaddedBytes* output,
+                                SpeedStats* JXL_RESTRICT stats);
+
+jxl::Status WriteJxlOutput(const DecompressArgs& args, const char* file_out,
+                           jxl::CodecInOut& io,
+                           jxl::ThreadPool* pool = nullptr);
+
+}  // namespace tools
+}  // namespace jpegxl
+
+#endif  // TOOLS_DJXL_H_