--- /dev/null
+/*
+ *
+ * Copyright 2015 gRPC authors.
+ *
+ * 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.
+ *
+ */
+
+#ifndef GRPC_CORE_LIB_COMPRESSION_ALGORITHM_METADATA_H
+#define GRPC_CORE_LIB_COMPRESSION_ALGORITHM_METADATA_H
+
+#include <grpc/support/port_platform.h>
+
+#include <grpc/compression.h>
+#include "src/core/lib/compression/compression_internal.h"
+#include "src/core/lib/transport/metadata.h"
+
+/** Return compression algorithm based metadata value */
+grpc_slice grpc_compression_algorithm_slice(
+ grpc_compression_algorithm algorithm);
+
+/** Find compression algorithm based on passed in mdstr - returns
+ * GRPC_COMPRESS_ALGORITHM_COUNT on failure */
+grpc_compression_algorithm grpc_compression_algorithm_from_slice(
+ const grpc_slice& str);
+
+/** Return compression algorithm based metadata element */
+grpc_mdelem grpc_compression_encoding_mdelem(
+ grpc_compression_algorithm algorithm);
+
+/** Return message compression algorithm based metadata element (grpc-encoding:
+ * xxx) */
+grpc_mdelem grpc_message_compression_encoding_mdelem(
+ grpc_message_compression_algorithm algorithm);
+
+/** Return stream compression algorithm based metadata element
+ * (content-encoding: xxx) */
+grpc_mdelem grpc_stream_compression_encoding_mdelem(
+ grpc_stream_compression_algorithm algorithm);
+
+/** Find compression algorithm based on passed in mdstr - returns
+ * GRPC_COMPRESS_ALGORITHM_COUNT on failure */
+grpc_message_compression_algorithm
+grpc_message_compression_algorithm_from_slice(const grpc_slice& str);
+
+/** Find stream compression algorithm based on passed in mdstr - returns
+ * GRPC_STREAM_COMPRESS_ALGORITHM_COUNT on failure */
+grpc_stream_compression_algorithm grpc_stream_compression_algorithm_from_slice(
+ const grpc_slice& str);
+
+#endif /* GRPC_CORE_LIB_COMPRESSION_ALGORITHM_METADATA_H */