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This commit implements gstreamer controls for the libcamera element by
generating the controls from the control_ids_*.yaml files using a new
gen-gst-controls.py script. The appropriate meson files are also changed
to automatically run the script when building.
The gen-gst-controls.py script works similar to the gen-controls.py
script by parsing the control_ids_*.yaml files and generating C++ code
for each exposed control.
For the controls to be used as gstreamer properties the type for each
control needs to be translated to the appropriate glib type and a
GEnumValue is generated for each enum control. Then a
g_object_install_property(), _get_property() and _set_property()
function is generated for each control.
The vendor controls get prefixed with "$vendor-" in the final gstreamer
property name.
The C++ code generated by the gen-gst-controls.py script is written into
the template gstlibcamerasrc-controls.cpp.in file. The matching
gstlibcamerasrc-controls.h header defines the GstCameraControls class
which handles the installation of the gstreamer properties as well as
keeping track of the control values and setting and getting the
controls. The content of these functions is generated in the Python
script.
Finally the libcamerasrc element itself is edited to make use of the new
GstCameraControls class. The way this works is by defining a PROP_LAST
enum variant which is passed to the installProperties() function so the
properties are defined with the appropriate offset. When getting or
setting a property PROP_LAST is subtracted from the requested property
to translate the control back into a libcamera::controls:: enum
variant.
Signed-off-by: Jaslo Ziska <jaslo@ziska.de>
Reviewed-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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The tracepoints.h file is generated from the tracepoints.h.in template
by the gen-tp-header.py script. The template contains a {{year}}
placeholder for the copyright year, which the script fills with the
current year. This breaks reproducible builds with at least the openSUSE
debugsource package.
As the gen-tp-header.py script doesn't add any copyrightable contents to
the tracepoints.h file, fix this by replacing the {{year}} placeholder
with the year of the last copyright-worthy change to tracepoints.h.in.
Signed-off-by: Bernhard M. Wiedemann <bwiedemann@suse.de>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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The ipa_interface.h file includes a number of headers that are not
directly used. Remove them, and add them to the source files that
include ipa_interface.h as required.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Milan Zamazal <mzamazal@redhat.com>
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Depending on the types used in the IPA interface, generated headers may
use the std::string class. Include <string> when needed.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Milan Zamazal <mzamazal@redhat.com>
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Replace manual extraction of data from YAML with the Control helper
class. This centralizes YAML parsing and avoids manual mistakes.
In order to import the controls module, add the utils/codegen/ directory
to the PYTHONPATH through the Python build environment.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
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The ControlEnum and Control helper classes defined in gen-controls.py
are useful for other generator scripts. Move them to a separate file to
make it possible to share them.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Daniel Scally <dan.scally@ideasonboard.com>
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Jinja2 templates help separate the logic related to the template from
the generation of the data. The python code becomes much clearer as a
result.
As an added bonus, we can use a single template file for both controls
and properties.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
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The libcamera.h header is a top-level library header that contains every
other libcamera header. It is currently generated by listing the files
in include/libcamera/ and dropping the .in suffix from template files.
This assumes a 1:1 mapping between generated header file names and the
name of their templates.
Drop that assumption and base the libcamera.h generation on the
libcamera public headers listed in meson.build. This makes the
libcamera.h header generation more future-proof.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Daniel Scally <dan.scally@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
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Python scripts run as part of the build process need to take a few
actions specific to the environment in which they operate. One of those
is disabling the Python bytecode cache, to avoid writing .pyc files to
the source tree. This is done manually in the IPC generate.py and
parser.py scripts.
The current implementation is not ideal because it hardcodes in the
scripts information related to the environment in which they operate. As
those scripts are part of libcamera this is more of a theoretical issue
than a practical one. A second issue is that future Python scripts will
need to duplicate similar mechanisms, resulting in a higher maintenance
burden.
Address the issue with a different approach, by creating a meson
environment for the Python scripts, and passing it to the
custom_target() functions. The environment only disables the bytecode
cache for now.
The diffstat shows an increase in code size. This is expected to be
offset by usage of the environment for more Python scripts, as well as
support of more variables in the environment.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Reviewed-by: Daniel Scally <dan.scally@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
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We have multiple code generation scripts in utils/, mixed with other
miscellaneous utilities, as well as a larger code base based on mojom in
utils/ipc/. To make code sharing easier between the generator scripts,
without creating a mess in the utils/ directory, move all the code
generation code to utils/codegen/.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Daniel Scally <dan.scally@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
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