[libcamera-devel] [PATCH v5 08/23] meson: ipa, proxy: Generate headers and proxy with mojo

Paul Elder paul.elder at ideasonboard.com
Sat Dec 5 11:30:51 CET 2020


Run mojo from meson to generate the header, serializer, and proxy files
for every pipeline's mojom data definition file.

Signed-off-by: Paul Elder <paul.elder at ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart at ideasonboard.com>

---
No change in v5

Changes in v4:
- rename module_generated.h.tmpl to module_ipa_interface.h.tmpl
- rename module_serializer.h.tmpl to module_ipa_serializer.h.tmpl
- rename libcamera_generated headers to libcamera_generated_ipa_headers
  in meson

Changes in v3:
- change parser path to our wrapper parser script, instead of running
  mojo's directly

Changes in v2:
- clean up loops
- remove non-literal keys in maps
- move loading the mojom scripts to utils/
- declare the template files in meson
- add the generated headers into libcamera_generated_headers instead of
  libcamera_internal_headers
- add libcamera_generated_headers to libcamera_sources
---
 include/libcamera/ipa/meson.build             | 78 +++++++++++++++++++
 src/libcamera/meson.build                     |  1 +
 src/libcamera/proxy/meson.build               | 18 +++++
 src/libcamera/proxy/worker/meson.build        | 19 ++++-
 .../libcamera_templates/meson.build           | 11 +++
 utils/ipc/generators/meson.build              |  3 +
 utils/ipc/meson.build                         | 13 ++++
 7 files changed, 141 insertions(+), 2 deletions(-)
 create mode 100644 utils/ipc/generators/libcamera_templates/meson.build
 create mode 100644 utils/ipc/generators/meson.build

diff --git a/include/libcamera/ipa/meson.build b/include/libcamera/ipa/meson.build
index 508c6bd1..d7a2b6b2 100644
--- a/include/libcamera/ipa/meson.build
+++ b/include/libcamera/ipa/meson.build
@@ -8,3 +8,81 @@ libcamera_ipa_headers = files([
 
 install_headers(libcamera_ipa_headers,
                 subdir: join_paths(libcamera_include_dir, 'ipa'))
+
+#
+# Prepare IPA/IPC generation components
+#
+
+ipa_mojom_files = []
+
+ipa_mojoms = []
+
+#
+# Generate headers from templates.
+#
+
+libcamera_generated_ipa_headers = []
+
+foreach file : ipa_mojom_files
+    name = file.split('.')[0]
+
+    # {pipeline}.mojom-module
+    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@'
+                          ])
+
+    # {pipeline}_generated.h
+    header = custom_target(name + '_ipa_interface_h',
+                           input : mojom,
+                           output : name + '_ipa_interface.h',
+                           depends : mojom_templates,
+                           command : [
+                               mojom_generator, 'generate',
+                               '-g', 'libcamera',
+                               '--bytecode_path', mojom_templates_dir,
+                               '--libcamera_generate_header',
+                               '--libcamera_output_path=@OUTPUT@',
+                               './' +'@INPUT@'
+                           ])
+
+    # {pipeline}_serializer.h
+    serializer = custom_target(name + '_ipa_serializer_h',
+                               input : mojom,
+                               output : name + '_ipa_serializer.h',
+                               depends : mojom_templates,
+                               command : [
+                                   mojom_generator, 'generate',
+                                   '-g', 'libcamera',
+                                   '--bytecode_path', mojom_templates_dir,
+                                   '--libcamera_generate_serializer',
+                                   '--libcamera_output_path=@OUTPUT@',
+                                   './' +'@INPUT@'
+                               ])
+
+    # ipa_proxy_{pipeline}.h
+    proxy_header = custom_target(name + '_proxy_h',
+                                 input : mojom,
+                                 output : 'ipa_proxy_' + name + '.h',
+                                 depends : mojom_templates,
+                                 command : [
+                                     mojom_generator, 'generate',
+                                     '-g', 'libcamera',
+                                     '--bytecode_path', mojom_templates_dir,
+                                     '--libcamera_generate_proxy_h',
+                                     '--libcamera_output_path=@OUTPUT@',
+                                     './' +'@INPUT@'
+                                 ])
+
+    ipa_mojoms += {
+        'name': name,
+        'mojom': mojom,
+    }
+
+    libcamera_generated_ipa_headers += [header, serializer, proxy_header]
+endforeach
diff --git a/src/libcamera/meson.build b/src/libcamera/meson.build
index cd3cf9e3..f7f3627c 100644
--- a/src/libcamera/meson.build
+++ b/src/libcamera/meson.build
@@ -59,6 +59,7 @@ libcamera_sources = files([
 ])
 
 libcamera_sources += libcamera_public_headers
+libcamera_sources += libcamera_generated_ipa_headers
 libcamera_sources += libcamera_tracepoint_header
 
 includes = [
diff --git a/src/libcamera/proxy/meson.build b/src/libcamera/proxy/meson.build
index bd804750..ac68ad08 100644
--- a/src/libcamera/proxy/meson.build
+++ b/src/libcamera/proxy/meson.build
@@ -4,3 +4,21 @@ libcamera_sources += files([
     'ipa_proxy_linux.cpp',
     'ipa_proxy_thread.cpp',
 ])
+
+# generate ipa_proxy_{pipeline}.cpp
+foreach mojom : ipa_mojoms
+    proxy = custom_target(mojom['name'] + '_proxy_cpp',
+                          input : mojom['mojom'],
+                          output : 'ipa_proxy_' + mojom['name'] + '.cpp',
+                          depends : [mojom_templates],
+                          command : [
+                              mojom_generator, 'generate',
+                              '-g', 'libcamera',
+                              '--bytecode_path', mojom_templates_dir,
+                              '--libcamera_generate_proxy_cpp',
+                              '--libcamera_output_path=@OUTPUT@',
+                              './' + '@INPUT@'
+                          ])
+
+    libcamera_sources += proxy
+endforeach
diff --git a/src/libcamera/proxy/worker/meson.build b/src/libcamera/proxy/worker/meson.build
index ac0310a7..8e0b978a 100644
--- a/src/libcamera/proxy/worker/meson.build
+++ b/src/libcamera/proxy/worker/meson.build
@@ -6,8 +6,23 @@ ipa_proxy_sources = [
 
 proxy_install_dir = join_paths(get_option('libexecdir'), 'libcamera')
 
-foreach t : ipa_proxy_sources
-    proxy = executable(t[0], t[1],
+# generate ipa_proxy_{pipeline}_worker.cpp
+foreach mojom : ipa_mojoms
+    worker = custom_target(mojom['name'] + '_proxy_worker',
+                           input : mojom['mojom'],
+                           output : 'ipa_proxy_' + mojom['name'] + '_worker.cpp',
+                           depends : [mojom_templates],
+                           command : [
+                               mojom_generator, 'generate',
+                               '-g', 'libcamera',
+                               '--bytecode_path', mojom_templates_dir,
+                               '--libcamera_generate_proxy_worker',
+                               '--libcamera_output_path=@OUTPUT@',
+                               './' + '@INPUT@'
+                           ])
+
+    proxy = executable('ipa_proxy_' + mojom['name'],
+                       [worker, libcamera_generated_ipa_headers],
                        install : true,
                        install_dir : proxy_install_dir,
                        dependencies : libcamera_dep)
diff --git a/utils/ipc/generators/libcamera_templates/meson.build b/utils/ipc/generators/libcamera_templates/meson.build
new file mode 100644
index 00000000..d7c9dea7
--- /dev/null
+++ b/utils/ipc/generators/libcamera_templates/meson.build
@@ -0,0 +1,11 @@
+# SPDX-License-Identifier: CC0-1.0
+
+mojom_template_files = files([
+    'module_ipa_interface.h.tmpl',
+    'module_ipa_proxy.cpp.tmpl',
+    'module_ipa_proxy.h.tmpl',
+    'module_ipa_proxy_worker.cpp.tmpl',
+    'module_ipa_serializer.h.tmpl',
+    'proxy_functions.tmpl',
+    'serializer.tmpl',
+])
diff --git a/utils/ipc/generators/meson.build b/utils/ipc/generators/meson.build
new file mode 100644
index 00000000..504f1a46
--- /dev/null
+++ b/utils/ipc/generators/meson.build
@@ -0,0 +1,3 @@
+# SPDX-License-Identifier: CC0-1.0
+
+subdir('libcamera_templates')
diff --git a/utils/ipc/meson.build b/utils/ipc/meson.build
index 59f097f0..4a41b9c1 100644
--- a/utils/ipc/meson.build
+++ b/utils/ipc/meson.build
@@ -1,3 +1,16 @@
 # SPDX-License-Identifier: CC0-1.0
 
+subdir('generators')
+
 py_modules += ['jinja2', 'ply']
+
+mojom_parser = find_program('./parser.py')
+
+mojom_generator = find_program('./generate.py')
+
+mojom_templates = custom_target('mojom_templates',
+                                input : mojom_template_files,
+                                output : 'libcamera_templates.zip',
+                                command : [mojom_generator, '-o', '@OUTDIR@', 'precompile'])
+
+mojom_templates_dir = meson.current_build_dir()
-- 
2.27.0



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