[libcamera-devel] [PATCH v6 3/5] lc-compliance: Add Environment singleton

[Jacopo Mondi]

Hi again,

On Mon, Jun 07, 2021 at 03:15:04PM -0300, Nícolas F. R. A. Prado wrote:
> Add a singleton Environment class in order to make the camera available
> inside all tests. This is needed for the Googletest refactor, otherwise
> the tests, which are statically declared, won't be able to access the
> camera.
>
> Signed-off-by: Nícolas F. R. A. Prado <nfraprado at collabora.com>
> Reviewed-by: Niklas Söderlund <niklas.soderlund at ragnatech.se>
> ---
> Changes in v6:
> - Thanks to Niklas:
>   - Made cameraId() return const&
>
> Changes in v5:
> - Thanks to Laurent:
>   - Stored CameraManager and cameraId instead of Camera in Environment
> - Thanks to Laurent & Niklas:
>   - Improved Environment singleton class instantiation and destruction
>
> Added in v4
>
>  src/lc-compliance/environment.cpp | 20 ++++++++++++++++++++
>  src/lc-compliance/environment.h   | 31 +++++++++++++++++++++++++++++++
>  src/lc-compliance/meson.build     |  1 +
>  3 files changed, 52 insertions(+)
>  create mode 100644 src/lc-compliance/environment.cpp
>  create mode 100644 src/lc-compliance/environment.h
>
> diff --git a/src/lc-compliance/environment.cpp b/src/lc-compliance/environment.cpp
> new file mode 100644
> index 000000000000..fbe75fcc2cfb
> --- /dev/null
> +++ b/src/lc-compliance/environment.cpp
> @@ -0,0 +1,20 @@
> +/* SPDX-License-Identifier: GPL-2.0-or-later */
> +/*
> + * Copyright (C) 2021, Collabora Ltd.
> + *
> + * environment.cpp - Common environment for tests
> + */
> +
> +#include "environment.h"
> +
> +Environment *Environment::get()
> +{
> +	static Environment instance;
> +	return &instance;
> +}
> +
> +void Environment::setup(std::shared_ptr<CameraManager> cm, std::string cameraId)
> +{
> +	cm_ = cm;
> +	cameraId_ = cameraId;

Seeing how this is used later, do we need to store the id and go
through
        camera_ = env->cm()->get(env->cameraId());
?

Can't we get the Camera and acquire it in the environment and have
        std::shared_ptr<Camera> camera() const { return camera_; }

This way you probably won't need to access the CameraManager from the
Environment

> +}
> diff --git a/src/lc-compliance/environment.h b/src/lc-compliance/environment.h
> new file mode 100644
> index 000000000000..fd05d445620f
> --- /dev/null
> +++ b/src/lc-compliance/environment.h
> @@ -0,0 +1,31 @@
> +/* SPDX-License-Identifier: GPL-2.0-or-later */
> +/*
> + * Copyright (C) 2021, Collabora Ltd.
> + *
> + * environment.h - Common environment for tests
> + */
> +#ifndef __LC_COMPLIANCE_ENVIRONMENT_H__
> +#define __LC_COMPLIANCE_ENVIRONMENT_H__
> +
> +#include <libcamera/libcamera.h>
> +
> +using namespace libcamera;
> +
> +class Environment
> +{
> +public:
> +	static Environment *get();
> +
> +	void setup(std::shared_ptr<CameraManager> cm, std::string cameraId);
> +
> +	const std::string &cameraId() const{ return cameraId_; }
> +	std::shared_ptr<CameraManager> cm() const { return cm_; }
> +
> +private:
> +	Environment() {};
> +
> +	std::string cameraId_;
> +	std::shared_ptr<CameraManager> cm_;
> +};
> +
> +#endif /* __LC_COMPLIANCE_ENVIRONMENT_H__ */
> diff --git a/src/lc-compliance/meson.build b/src/lc-compliance/meson.build
> index a2bfcceb1259..6dd49085569f 100644
> --- a/src/lc-compliance/meson.build
> +++ b/src/lc-compliance/meson.build
> @@ -12,6 +12,7 @@ lc_compliance_enabled = true
>  lc_compliance_sources = files([
>      '../cam/event_loop.cpp',
>      '../cam/options.cpp',
> +    'environment.cpp',
>      'main.cpp',
>      'results.cpp',
>      'simple_capture.cpp',
> --
> 2.31.1
>