libcamera: Move ipa includes to the same level as libcamera

The ipa includes are located in include/libcamera/ipa/. This gives an
incorrect impression that they are a sub-part of the rest of the
libcamera API, while they are the API towards the IPA the same way that
include/libcamera/ contains the API towards applications. To clarify
this, move them to include/ipa/.

The IPA headers are however still part of libcamera, so installing them
to ${prefix}/include/ipa/ would make little sense. To fix this, move the
application facing API to ${prefix}/include/libcamera/libcamera/ when
installed, and the IPA to ${prefix}/include/libcamera/ipa/. When major
versions of libcamera will be released, they could then be installed
side by side in ${prefix}/include/libcamera-${version}/.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>

3 files changed, 59 insertions, 0 deletions

diff --git a/include/ipa/ipa_interface.h b/include/ipa/ipa_interface.h
new file mode 100644
index 00000000..2c5eb1fd
--- /dev/null
+++ b/include/ipa/ipa_interface.h
@@ -0,0 +1,22 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+/*
+ * Copyright (C) 2019, Google Inc.
+ *
+ * ipa_interface.h - Image Processing Algorithm interface
+ */
+#ifndef __LIBCAMERA_IPA_INTERFACE_H__
+#define __LIBCAMERA_IPA_INTERFACE_H__
+
+namespace libcamera {
+
+class IPAInterface
+{
+public:
+	virtual ~IPAInterface() {}
+
+	virtual int init() = 0;
+};
+
+} /* namespace libcamera */
+
+#endif /* __LIBCAMERA_IPA_INTERFACE_H__ */
diff --git a/include/ipa/ipa_module_info.h b/include/ipa/ipa_module_info.h
new file mode 100644
index 00000000..d9e33c1d
--- /dev/null
+++ b/include/ipa/ipa_module_info.h
@@ -0,0 +1,30 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+/*
+ * Copyright (C) 2019, Google Inc.
+ *
+ * ipa_module_info.h - Image Processing Algorithm module information
+ */
+#ifndef __LIBCAMERA_IPA_MODULE_INFO_H__
+#define __LIBCAMERA_IPA_MODULE_INFO_H__
+
+#include <stdint.h>
+
+#define IPA_MODULE_API_VERSION 1
+
+namespace libcamera {
+
+struct IPAModuleInfo {
+	int moduleAPIVersion;
+	uint32_t pipelineVersion;
+	char pipelineName[256];
+	char name[256];
+	char license[64];
+} __attribute__((packed));
+
+extern "C" {
+extern const struct IPAModuleInfo ipaModuleInfo;
+};
+
+}; /* namespace libcamera */
+
+#endif /* __LIBCAMERA_IPA_MODULE_INFO_H__ */
diff --git a/include/ipa/meson.build b/include/ipa/meson.build
new file mode 100644
index 00000000..a0ce96ba
--- /dev/null
+++ b/include/ipa/meson.build
@@ -0,0 +1,7 @@
+libcamera_ipa_api = files([
+    'ipa_interface.h',
+    'ipa_module_info.h',
+])
+
+install_headers(libcamera_ipa_api,
+                subdir: join_paths(libcamera_include_dir, 'ipa'))