diff --git a/include/tinycompress/compress_plugin.h b/include/tinycompress/compress_plugin.h
new file mode 100644
index 0000000..abd59f2
--- /dev/null
+++ b/include/tinycompress/compress_plugin.h
@@ -0,0 +1,89 @@
+/* compress_plugin.h
+**
+** Copyright (c) 2019, The Linux Foundation. All rights reserved.
+**
+** Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above
+**     copyright notice, this list of conditions and the following
+**     disclaimer in the documentation and/or other materials provided
+**     with the distribution.
+**   * Neither the name of The Linux Foundation nor the names of its
+**     contributors may be used to endorse or promote products derived
+**     from this software without specific prior written permission.
+**
+** THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+** WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+** MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+** ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+** BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+** CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+** SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+** BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+** WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+** OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+** IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+**/
+
+#ifndef __COMPRESS_PLUGIN_H__
+#define __COMPRESS_PLUGIN_H__
+
+#include "sound/compress_params.h"
+#include "sound/compress_offload.h"
+
+#define COMPRESS_PLUGIN_OPEN_FN(name)                    \
+	int name##_open(struct compress_plugin **plugin,     \
+			unsigned int card,                   \
+			unsigned int device,                  \
+			unsigned int flags)
+
+#define COMPRESS_PLUGIN_OPEN_FN_PTR()                        \
+	int (*plugin_open_fn) (struct compress_plugin **plugin,  \
+				unsigned int card,                \
+				unsigned int device,               \
+				unsigned int flags);
+
+struct compress_plugin;
+
+struct compress_plugin_ops {
+	void (*close) (struct compress_plugin *plugin);
+	int (*get_caps) (struct compress_plugin *plugin,
+					 struct snd_compr_caps *caps);
+	int (*set_params) (struct compress_plugin *plugin,
+					   struct snd_compr_params *params);
+	int (*avail) (struct compress_plugin *plugin,
+				  struct snd_compr_avail *avail);
+	int (*tstamp) (struct compress_plugin *plugin,
+					 struct snd_compr_tstamp *tstamp);
+	int (*write) (struct compress_plugin *plugin,
+					 const void *buf, size_t size);
+	int (*read) (struct compress_plugin *plugin,
+					 void *buf, size_t size);
+	int (*start) (struct compress_plugin *plugin);
+	int (*stop) (struct compress_plugin *plugin);
+	int (*pause) (struct compress_plugin *plugin);
+	int (*resume) (struct compress_plugin *plugin);
+	int (*drain) (struct compress_plugin *plugin);
+	int (*partial_drain) (struct compress_plugin *plugin);
+	int (*next_track) (struct compress_plugin *plugin);
+	int (*ioctl) (struct compress_plugin *plugin, int cmd, ...);
+	int (*poll) (struct compress_plugin *plugin,
+			struct pollfd *fds, nfds_t nfds, int timeout);
+};
+
+struct compress_plugin {
+	unsigned int card;
+
+	struct compress_plugin_ops *ops;
+
+	void *node;
+	int mode;
+	void *priv;
+
+	unsigned int state;
+};
+
+#endif /* end of __COMPRESS_PLUGIN_H__ */