[libcamera-devel] [PATCH 05/23] meson: ipa, proxy: Generate headers and proxy with mojo

[Paul Elder]

Run mojo from meson to generate the header, serializer, and proxy files
for every pipeline's mojom data definition file. So far we only have the
raspberrypi mojom file.

Signed-off-by: Paul Elder <paul.elder at ideasonboard.com>
---

Dictionaries with non-literal keys is apparently a meson 0.53 feature.

 include/libcamera/ipa/meson.build      | 87 ++++++++++++++++++++++++++
 src/libcamera/proxy/meson.build        | 21 +++++++
 src/libcamera/proxy/worker/meson.build | 25 +++++++-
 3 files changed, 131 insertions(+), 2 deletions(-)

diff --git a/include/libcamera/ipa/meson.build b/include/libcamera/ipa/meson.build
index 508c6bd1..f61a5a8f 100644
--- a/include/libcamera/ipa/meson.build
+++ b/include/libcamera/ipa/meson.build
@@ -8,3 +8,90 @@ libcamera_ipa_headers = files([
 
 install_headers(libcamera_ipa_headers,
                 subdir: join_paths(libcamera_include_dir, 'ipa'))
+
+#
+# Prepare IPA/IPC generation components
+#
+
+ipa_mojom_files = []
+
+mojom_generator = find_program('../../../utils/ipc/generate.py')
+
+mojom_template = custom_target('mojom_template',
+                               output : 'dummy',
+                               command : [mojom_generator, 'precompile'])
+
+mojom_parser = find_program('../../../utils/ipc/mojo/public/tools/mojom/mojom_parser.py')
+
+# {pipeline}.mojom-module
+ipa_mojoms = {}
+
+foreach file : ipa_mojom_files
+    name = file.split('.')[0]
+    mojom = custom_target(file.split('.')[0] + '_mojom_module',
+                          input : file,
+                          output : file + '-module',
+                          command : [mojom_parser,
+                                     '--output-root', meson.build_root(),
+                                     '--input-root', meson.source_root(),
+                                     '--mojoms', '@INPUT@'
+                          ])
+    ipa_mojoms += { name: mojom }
+endforeach
+
+#
+# Generate headers from templates.
+#
+
+# {pipeline}_generated.h
+# generate {pipeline}_serializer.h
+# generate ipa_proxy_{pipeline}.h
+ipa_headers = {}
+ipa_serializers = {}
+ipa_proxy_headers = {}
+
+foreach name, mojom : ipa_mojoms
+    header = custom_target(name + '_generated_h',
+                           input : mojom,
+                           output : name + '_generated.h',
+                           depends : mojom_template,
+                           command : [mojom_generator, 'generate',
+                                      '-g', 'libcamera',
+                                      '--bytecode_path', '.',
+                                      '--libcamera_generate_header',
+                                      '--libcamera_output_path=@OUTPUT@',
+                                      './' +'@INPUT@'
+                           ])
+
+    serializer = custom_target(name + '_serializer_h',
+                               input : mojom,
+                               output : name + '_serializer.h',
+                               depends : mojom_template,
+                               command : [mojom_generator, 'generate',
+                                          '-g', 'libcamera',
+                                          '--bytecode_path', '.',
+                                          '--libcamera_generate_serializer',
+                                          '--libcamera_output_path=@OUTPUT@',
+                                          './' +'@INPUT@'
+                               ])
+
+    proxy_header = custom_target(name + '_proxy_h',
+                                 input : mojom,
+                                 output : 'ipa_proxy_' + name + '.h',
+                                 depends : mojom_template,
+                                 command : [mojom_generator, 'generate',
+                                            '-g', 'libcamera',
+                                            '--bytecode_path', '.',
+                                            '--libcamera_generate_proxy_h',
+                                            '--libcamera_output_path=@OUTPUT@',
+                                            './' +'@INPUT@'
+                                 ])
+
+    ipa_headers += { name: header }
+    ipa_serializers += { name: serializer }
+    ipa_proxy_headers += { name: proxy_header }
+endforeach
+
+libcamera_internal_headers += ipa_proxy_headers
+libcamera_internal_headers += ipa_headers
+libcamera_internal_headers += ipa_serializers
diff --git a/src/libcamera/proxy/meson.build b/src/libcamera/proxy/meson.build
index bd804750..b0d35646 100644
--- a/src/libcamera/proxy/meson.build
+++ b/src/libcamera/proxy/meson.build
@@ -4,3 +4,24 @@ libcamera_sources += files([
     'ipa_proxy_linux.cpp',
     'ipa_proxy_thread.cpp',
 ])
+
+# generate ipa_proxy_{pipeline}.cpp
+ipa_proxy_sources = []
+
+foreach name, mojom : ipa_mojoms
+    ipa_proxy_sources += custom_target(name + '_proxy_cpp',
+                                       input : mojom,
+                                       output : 'ipa_proxy_' + name + '.cpp',
+                                       depends : [mojom_template,
+                                                  ipa_headers[name],
+                                                  ipa_serializers[name],
+                                                  ipa_proxy_headers[name]],
+                                       command : [mojom_generator, 'generate',
+                                                  '-g', 'libcamera',
+                                                  '--bytecode_path', '.',
+                                                  '--libcamera_generate_proxy_cpp',
+                                                  '--libcamera_output_path=@OUTPUT@',
+                                                  './' + '@INPUT@'])
+endforeach
+
+libcamera_sources += ipa_proxy_sources
diff --git a/src/libcamera/proxy/worker/meson.build b/src/libcamera/proxy/worker/meson.build
index ac0310a7..c35be70c 100644
--- a/src/libcamera/proxy/worker/meson.build
+++ b/src/libcamera/proxy/worker/meson.build
@@ -4,10 +4,31 @@ ipa_proxy_sources = [
     ['ipa_proxy_linux', 'ipa_proxy_linux_worker.cpp']
 ]
 
+# generate ipa_proxy_{pipeline}_worker.cpp
+ipa_proxy_sources = {}
+
+foreach name, mojom : ipa_mojoms
+    worker = custom_target(name + '_proxy_worker',
+                           input : mojom,
+                           output : 'ipa_proxy_' + name + '_worker.cpp',
+                           depends : [mojom_template,
+                                      ipa_headers[name],
+                                      ipa_serializers[name],
+                                      ipa_proxy_headers[name]],
+                           command : [mojom_generator, 'generate',
+                                      '-g', 'libcamera',
+                                      '--bytecode_path', '.',
+                                      '--libcamera_generate_proxy_worker',
+                                      '--libcamera_output_path=@OUTPUT@',
+                                      './' + '@INPUT@'
+                           ])
+    ipa_proxy_sources += { 'ipa_proxy_' + name : worker }
+endforeach
+
 proxy_install_dir = join_paths(get_option('libexecdir'), 'libcamera')
 
-foreach t : ipa_proxy_sources
-    proxy = executable(t[0], t[1],
+foreach k, t : ipa_proxy_sources
+    proxy = executable(k, t,
                        install : true,
                        install_dir : proxy_install_dir,
                        dependencies : libcamera_dep)
-- 
2.27.0