asset compression

lib/gdeflate/GDeflate.h

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+/*
+ * SPDX-FileCopyrightText: Copyright (c) 2020, 2021, 2022 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+ * SPDX-FileCopyrightText: Copyright (c) Microsoft Corportaion. All rights reserved.
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include "config.h"
+
+namespace GDeflate
+{
+    // See README.MD in libdeflate_1_8 for details on Compression Levels
+    static const uint32_t MinimumCompressionLevel = 1;
+    static const uint32_t MaximumCompressionLevel = 12;
+
+    enum Flags
+    {
+        COMPRESS_SINGLE_THREAD = 0x200, /*!< Force compression using a single thread. */
+    };
+
+    size_t CompressBound(size_t size);
+
+    bool Compress(
+        uint8_t* output,
+        size_t* outputSize,
+        const uint8_t* in,
+        size_t inSize,
+        uint32_t level,
+        uint32_t flags);
+
+    bool Decompress(uint8_t* output, size_t outputSize, const uint8_t* in, size_t inSize, uint32_t numWorkers);
+
+} // namespace GDeflate