add cluster i/o pipeline

src/compress.h

@@ -0,0 +1,24 @@
+#ifndef COMPRESS_H_
+#define COMPRESS_H_
+
+#include <stddef.h>
+
+struct ec3_compression_function {
+	enum ec3_status (*e_compress)(
+		const void *in,
+		size_t in_size,
+		void *out,
+		size_t out_max,
+		size_t *out_size);
+
+	enum ec3_status (*e_decompress)(
+		const void *in,
+		size_t in_size,
+		void *out,
+		size_t out_size);
+};
+
+extern const struct ec3_compression_function *ec3_compression_function_get(
+	unsigned int type);
+
+#endif