[libcamera-devel] [PATCH 06/16] libcamera/base: Introduce new base library

[Kieran Bingham]

The libcamera-base.so will feature internal support functionality
that is utilised by libcamera, and can be shared in other places.

This new library provides a layer beneath libcamera which provides
common abstractions to internal objects.

A pkg-config file is generated and named libcamera-base.pc which allows
components such as external IPA modules to link directly to this library
if they need. Normal applications will reference this library through
the Requires: statement provided by the libcamera.pc package
configuration, and linkage will be handled automatically through the
pkg-config mechanisms.

Signed-off-by: Kieran Bingham <kieran.bingham at ideasonboard.com>
---
 Documentation/meson.build          |  2 ++
 include/libcamera/base/meson.build |  9 +++++++++
 include/libcamera/meson.build      |  1 +
 src/libcamera/base/meson.build     | 27 +++++++++++++++++++++++++++
 src/libcamera/meson.build          |  4 ++++
 5 files changed, 43 insertions(+)
 create mode 100644 include/libcamera/base/meson.build
 create mode 100644 src/libcamera/base/meson.build

diff --git a/Documentation/meson.build b/Documentation/meson.build
index 9ecf4dfcf79f..808076e056d0 100644
--- a/Documentation/meson.build
+++ b/Documentation/meson.build
@@ -27,6 +27,8 @@ if doxygen.found() and dot.found()
                       libcamera_ipa_interfaces,
                       libcamera_public_headers,
                       libcamera_sources,
+                      libcamera_base_headers,
+                      libcamera_base_sources,
                       libipa_headers,
                       libipa_sources,
                   ],
diff --git a/include/libcamera/base/meson.build b/include/libcamera/base/meson.build
new file mode 100644
index 000000000000..0a7a57b81191
--- /dev/null
+++ b/include/libcamera/base/meson.build
@@ -0,0 +1,9 @@
+# SPDX-License-Identifier: CC0-1.0
+
+libcamera_base_include_dir = libcamera_include_dir / 'base'
+
+libcamera_base_headers = files([
+])
+
+install_headers(libcamera_base_headers,
+                subdir: libcamera_base_include_dir)
diff --git a/include/libcamera/meson.build b/include/libcamera/meson.build
index 086c958b0a53..1fa1bf4a4e78 100644
--- a/include/libcamera/meson.build
+++ b/include/libcamera/meson.build
@@ -25,6 +25,7 @@ include_dir = libcamera_include_dir / 'libcamera'
 
 subdir('internal')
 subdir('ipa')
+subdir('base')
 
 install_headers(libcamera_public_headers,
                 subdir : include_dir)
diff --git a/src/libcamera/base/meson.build b/src/libcamera/base/meson.build
new file mode 100644
index 000000000000..3d58fea36ef5
--- /dev/null
+++ b/src/libcamera/base/meson.build
@@ -0,0 +1,27 @@
+# SPDX-License-Identifier: CC0-1.0
+
+libcamera_base_sources = files([
+])
+
+libcamera_base_deps = [
+]
+
+libcamera_base_lib = shared_library('libcamera-base',
+                                    [libcamera_base_sources, libcamera_base_headers],
+                                    name_prefix : '',
+                                    install : true,
+                                    cpp_args : libcamera_cpp_args,
+                                    include_directories : libcamera_includes,
+                                    dependencies : libcamera_base_deps)
+
+libcamera_base = declare_dependency(sources : [
+                                        libcamera_base_headers,
+                                    ],
+                                    include_directories : libcamera_includes,
+                                    link_with : libcamera_base_lib)
+
+pkg_mod = import('pkgconfig')
+pkg_mod.generate(libcamera_base_lib,
+                 version : '1.0',
+                 description : 'Camera support base utility library',
+                 subdirs : 'libcamera')
diff --git a/src/libcamera/meson.build b/src/libcamera/meson.build
index e792094f5798..eaf3cec8cba7 100644
--- a/src/libcamera/meson.build
+++ b/src/libcamera/meson.build
@@ -67,6 +67,7 @@ includes = [
     libcamera_includes,
 ]
 
+subdir('base')
 subdir('ipa')
 subdir('pipeline')
 subdir('proxy')
@@ -128,6 +129,7 @@ libcamera_deps = [
     libgnutls,
     liblttng,
     libudev,
+    libcamera_base,
     dependency('threads'),
 ]
 
@@ -156,10 +158,12 @@ libcamera_dep = declare_dependency(sources : [
                                        libcamera_generated_ipa_headers,
                                    ],
                                    include_directories : libcamera_includes,
+                                   dependencies: libcamera_base,
                                    link_with : libcamera)
 
 pkg_mod = import('pkgconfig')
 pkg_mod.generate(libcamera,
+                 libraries : libcamera_base_lib,
                  version : '1.0',
                  description : 'Complex Camera Support Library',
                  subdirs : 'libcamera')
-- 
2.30.2