diff --git a/src/android/post_processor.h b/src/android/post_processor.h
new file mode 100644
index 0000000..a891c43
--- /dev/null
+++ b/src/android/post_processor.h
@@ -0,0 +1,28 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+/*
+ * Copyright (C) 2020, Google Inc.
+ *
+ * post_processor.h - CameraStream Post Processing Interface
+ */
+#ifndef __ANDROID_POST_PROCESSOR_H__
+#define __ANDROID_POST_PROCESSOR_H__
+
+#include <libcamera/buffer.h>
+#include <libcamera/span.h>
+#include <libcamera/stream.h>
+
+class CameraMetadata;
+
+class PostProcessor
+{
+public:
+	virtual ~PostProcessor() {}
+
+	virtual int configure(const libcamera::StreamConfiguration &inCfg,
+			      const libcamera::StreamConfiguration &outCfg) = 0;
+	virtual int process(const libcamera::FrameBuffer *source,
+			    const libcamera::Span<uint8_t> &destination,
+			    CameraMetadata *metadata) = 0;
+};
+
+#endif /* __ANDROID_POST_PROCESSOR_H__ */