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authorLaurent Pinchart <laurent.pinchart@ideasonboard.com>2022-02-24 19:01:38 +0200
committerLaurent Pinchart <laurent.pinchart@ideasonboard.com>2022-04-01 14:29:25 +0300
commit8ad9249fb09d598cb24bae85101526fa822270ff (patch)
tree3d5f587bd2cc61ab76989efdbc0ecd471d3b09f3 /src/ipa/raspberrypi/controller/noise_status.h
parenta9d43c4710ba0db092c2abbf7d3423f4ac58352a (diff)
libipa: camera_sensor_helper: Implement exponential gain model
The CameraSensorHelper specifies two gain models, linear and exponential. They are modelled after the MIPI CCS specification. Only the linear model has been implemented, the exponential model was left for later. We now need to support sensors that configure their gain in a hardware register with a value expressed in dB. This has similarities with the MIPI CCS exponential gain model, but is only has an exponential factor, while CCS also allows sensors to support a configurable linear factor. The full CCS exponential model needs two values (for the linear and exponential factors) to express a gain, while IPAs use a single linear gain value internally. However, the exponential gain model example in the CCS specification has a fixed linear factor, which may indicate that it could be common for sensors that implement the exponential gain model to only use the exponential factor. For this reason, implement the exponential gain model with a fixed linear factor, but with a sensor-specific coefficient for the exponential factor that allows expressing the gain in dB (or other logarithmical units) instead of limiting it to powers of 2 as in the MIPI CCS specification. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Jacopo Mondi <jacopo@jmondi.org> Reviewed-by: Umang Jain <umang.jain@ideasonboard.com> Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
Diffstat (limited to 'src/ipa/raspberrypi/controller/noise_status.h')
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generated by cgit v1.2.1 (git 2.18.0) at 2025-06-10 03:37:32 +0000
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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 * Copyright (C) 2019, Google Inc.
 *
 * libcamera Camera API tests
 */

#include <iostream>

#include <libcamera/framebuffer_allocator.h>

#include "camera_test.h"
#include "test.h"

using namespace std;

namespace {

class Statemachine : public CameraTest, public Test
{
public:
	Statemachine()
		: CameraTest("platform/vimc.0 Sensor B")
	{
	}

protected:
	int testAvailable()
	{
		/* Test operations which should fail. */
		if (camera_->configure(defconf_.get()) != -EACCES)
			return TestFail;

		if (camera_->createRequest())
			return TestFail;

		if (camera_->start() != -EACCES)
			return TestFail;

		Request request(camera_.get());
		if (camera_->queueRequest(&request) != -EACCES)
			return TestFail;

		if (camera_->stop() != -EACCES)
			return TestFail;

		/* Test operations which should pass. */
		if (camera_->release())
			return TestFail;

		/* Test valid state transitions, end in Acquired state. */
		if (camera_->acquire())
			return TestFail;

		return TestPass;
	}

	int testAcquired()
	{
		/* Test operations which should fail. */
		if (camera_->acquire() != -EBUSY)
			return TestFail;

		if (camera_->createRequest())
			return TestFail;

		if (camera_->start() != -EACCES)
			return TestFail;

		Request request(camera_.get());
		if (camera_->queueRequest(&request) != -EACCES)
			return TestFail;

		if (camera_->stop() != -EACCES)
			return TestFail;

		/* Test valid state transitions, end in Configured state. */
		if (camera_->release())
			return TestFail;

		if (camera_->acquire())
			return TestFail;

		if (camera_->configure(defconf_.get()))
			return TestFail;

		return TestPass;
	}

	int testConfigured()
	{
		/* Test operations which should fail. */
		if (camera_->acquire() != -EBUSY)
			return TestFail;

		Request request1(camera_.get());
		if (camera_->queueRequest(&request1) != -EACCES)
			return TestFail;

		if (camera_->stop() != -EACCES)
			return TestFail;

		/* Test operations which should pass. */
		std::unique_ptr<Request> request2 = camera_->createRequest();
		if (!request2)
			return TestFail;

		/* Test valid state transitions, end in Running state. */
		if (camera_->release())
			return TestFail;

		if (camera_->acquire())
			return TestFail;

		if (camera_->configure(defconf_.get()))
			return TestFail;

		/* Use internally allocated buffers. */
		allocator_ = new FrameBufferAllocator(camera_);
		Stream *stream = *camera_->streams().begin();
		if (allocator_->allocate(stream) < 0)
			return TestFail;

		if (camera_->start())
			return TestFail;

		return TestPass;
	}

	int testRuning()
	{
		/* Test operations which should fail. */
		if (camera_->acquire() != -EBUSY)
			return TestFail;

		if (camera_->release() != -EBUSY)
			return TestFail;

		if (camera_->configure(defconf_.get()) != -EACCES)
			return TestFail;

		if (camera_->start() != -EACCES)
			return TestFail;

		/* Test operations which should pass. */
		std::unique_ptr<Request> request = camera_->createRequest();
		if (!request)
			return TestFail;

		Stream *stream = *camera_->streams().begin();
		if (request->addBuffer(stream, allocator_->buffers(stream)[0].get()))
			return TestFail;

		if (camera_->queueRequest(request.get()))
			return TestFail;

		/* Test valid state transitions, end in Available state. */
		if (camera_->stop())
			return TestFail;

		delete allocator_;

		if (camera_->release())
			return TestFail;

		return TestPass;
	}

	int init() override
	{
		if (status_ != TestPass)
			return status_;

		defconf_ = camera_->generateConfiguration({ StreamRole::VideoRecording });
		if (!defconf_) {
			cout << "Failed to generate default configuration" << endl;
			return TestFail;
		}

		return TestPass;
	}

	int run() override
	{
		if (testAvailable() != TestPass) {
			cout << "State machine in Available state failed" << endl;
			return TestFail;
		}

		if (testAcquired() != TestPass) {
			cout << "State machine in Acquired state failed" << endl;
			return TestFail;
		}

		if (testConfigured() != TestPass) {
			cout << "State machine in Configured state failed" << endl;
			return TestFail;