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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 * Copyright (C) 2019, Google Inc.
 *
 * event-dispatcher.cpp - Event dispatcher test
 */

#include <chrono>
#include <iostream>
#include <signal.h>
#include <sys/time.h>

#include "libcamera/internal/event_dispatcher.h"
#include "libcamera/internal/thread.h"
#include "libcamera/internal/timer.h"

#include "test.h"

using namespace std;
using namespace libcamera;

static EventDispatcher *dispatcher;
static bool interrupt;

class EventDispatcherTest : public Test
{
protected:
	static void sigAlarmHandler(int)
	{
		cout << "SIGALARM received" << endl;
		if (interrupt)
			dispatcher->interrupt();
	}

	int init()
	{
		dispatcher = Thread::current()->eventDispatcher();

		struct sigaction sa = {};
		sa.sa_handler = &sigAlarmHandler;
		sigaction(SIGALRM, &sa, nullptr);

		return 0;
	}

	int run()
	{
		Timer timer;

		/* Event processing interruption by signal. */
		std::chrono::steady_clock::time_point start = std::chrono::steady_clock::now();

		timer.start(1000);

		struct itimerval itimer = {};
		itimer.it_value.tv_usec = 500000;
		interrupt = false;
		setitimer(ITIMER_REAL, &itimer, nullptr);

		dispatcher->processEvents();

		std::chrono::steady_clock::time_point stop = std::chrono::steady_clock::now();
		std::chrono::steady_clock::duration duration = stop - start;
		int msecs = std::chrono::duration_cast<std::chrono::milliseconds>(duration).count();

		if (abs(msecs - 1000) > 50) {
			cout << "Event processing restart test failed" << endl;
			return TestFail;
		}

		/* Event processing interruption. */
		timer.start(1000);
		dispatcher->interrupt();

		dispatcher->processEvents();

		if (!timer.isRunning()) {
			cout << "Event processing immediate interruption failed" << endl;
			return TestFail;
		}

		timer.start(1000);
		itimer.it_value.tv_usec = 500000;
		interrupt = true;
		setitimer(ITIMER_REAL, &itimer, nullptr);

		dispatcher->processEvents();

		if (!timer.isRunning()) {
			cout << "Event processing delayed interruption failed" << endl;
			return TestFail;
		}

		return TestPass;
	}

	void cleanup()
	{
	}
};

TEST_REGISTER(EventDispatcherTest)
(enumerator_->enumerate()) { cerr << "Failed to enumerate media devices" << endl; return TestFail; } DeviceMatch dm("vivid"); dm.add("vivid-000-vid-cap"); media_ = enumerator_->search(dm); if (!media_) { cerr << "vivid video device found" << endl; return TestSkip; } dev_ = V4L2VideoDevice::fromEntityName(media_.get(), "vivid-000-vid-cap"); if (dev_->open()) { cerr << "Failed to open video device" << endl; return TestFail; } const ControlInfoMap &infoMap = dev_->controls(); /* Make sure the controls we require are present. */ if (infoMap.empty()) { cerr << "Failed to enumerate controls" << endl; return TestFail; } if (infoMap.find(V4L2_CID_BRIGHTNESS) == infoMap.end() || infoMap.find(V4L2_CID_CONTRAST) == infoMap.end()) { cerr << "Missing controls" << endl; return TestFail; } return TestPass; } int singleControlNoDelay() { std::unordered_map<uint32_t, DelayedControls::ControlParams> delays = { { V4L2_CID_BRIGHTNESS, { 0, false } }, }; std::unique_ptr<DelayedControls> delayed = std::make_unique<DelayedControls>(dev_.get(), delays); ControlList ctrls; /* Reset control to value not used in test. */ ctrls.set(V4L2_CID_BRIGHTNESS, 1); dev_->setControls(&ctrls); delayed->reset(); /* Trigger the first frame start event */ delayed->applyControls(0); /* Test control without delay are set at once. */ for (unsigned int i = 1; i < 100; i++) { int32_t value = 100 + i; ctrls.set(V4L2_CID_BRIGHTNESS, value); delayed->push(ctrls); delayed->applyControls(i); ControlList result = delayed->get(i); int32_t brightness = result.get(V4L2_CID_BRIGHTNESS).get<int32_t>(); if (brightness != value) { cerr << "Failed single control without delay" << " frame " << i << " expected " << value << " got " << brightness << endl; return TestFail; } } return TestPass; } int singleControlWithDelay() { std::unordered_map<uint32_t, DelayedControls::ControlParams> delays = { { V4L2_CID_BRIGHTNESS, { 1, false } }, }; std::unique_ptr<DelayedControls> delayed = std::make_unique<DelayedControls>(dev_.get(), delays); ControlList ctrls; /* Reset control to value that will be first in test. */ int32_t expected = 4; ctrls.set(V4L2_CID_BRIGHTNESS, expected); dev_->setControls(&ctrls); delayed->reset(); /* Trigger the first frame start event */ delayed->applyControls(0); /* Test single control with delay. */ for (unsigned int i = 1; i < 100; i++) { int32_t value = 10 + i; ctrls.set(V4L2_CID_BRIGHTNESS, value); delayed->push(ctrls); delayed->applyControls(i); ControlList result = delayed->get(i); int32_t brightness = result.get(V4L2_CID_BRIGHTNESS).get<int32_t>(); if (brightness != expected) { cerr << "Failed single control with delay" << " frame " << i << " expected " << expected << " got " << brightness << endl; return TestFail; } expected = value; } return TestPass; } int dualControlsWithDelay(uint32_t startOffset) { static const unsigned int maxDelay = 2; std::unordered_map<uint32_t, DelayedControls::ControlParams> delays = { { V4L2_CID_BRIGHTNESS, { 1, false } }, { V4L2_CID_CONTRAST, { maxDelay, false } }, }; std::unique_ptr<DelayedControls> delayed = std::make_unique<DelayedControls>(dev_.get(), delays); ControlList ctrls; /* Reset control to value that will be first two frames in test. */ int32_t expected = 200; ctrls.set(V4L2_CID_BRIGHTNESS, expected); ctrls.set(V4L2_CID_CONTRAST, expected + 1); dev_->setControls(&ctrls); delayed->reset(); /* Trigger the first frame start event */ delayed->applyControls(startOffset); /* Test dual control with delay. */ for (unsigned int i = 1; i < 100; i++) { uint32_t frame = startOffset + i; int32_t value = 10 + i; ctrls.set(V4L2_CID_BRIGHTNESS, value); ctrls.set(V4L2_CID_CONTRAST, value + 1); delayed->push(ctrls); delayed->applyControls(frame); ControlList result = delayed->get(frame); int32_t brightness = result.get(V4L2_CID_BRIGHTNESS).get<int32_t>(); int32_t contrast = result.get(V4L2_CID_CONTRAST).get<int32_t>(); if (brightness != expected || contrast != expected + 1) { cerr << "Failed dual controls" << " frame " << frame << " brightness " << brightness << " contrast " << contrast << " expected " << expected << endl; return TestFail; } expected = i < maxDelay ? expected : value - 1; } return TestPass; } int dualControlsMultiQueue() { static const unsigned int maxDelay = 2; std::unordered_map<uint32_t, DelayedControls::ControlParams> delays = { { V4L2_CID_BRIGHTNESS, { 1, false } }, { V4L2_CID_CONTRAST, { maxDelay, false } } }; std::unique_ptr<DelayedControls> delayed = std::make_unique<DelayedControls>(dev_.get(), delays); ControlList ctrls; /* Reset control to value that will be first two frames in test. */ int32_t expected = 100; ctrls.set(V4L2_CID_BRIGHTNESS, expected); ctrls.set(V4L2_CID_CONTRAST, expected); dev_->setControls(&ctrls); delayed->reset(); /* Trigger the first frame start event */ delayed->applyControls(0); /* * Queue all controls before any fake frame start. Note we * can't queue up more then the delayed controls history size * which is 16. Where one spot is used by the reset control. */ for (unsigned int i = 0; i < 15; i++) { int32_t value = 10 + i; ctrls.set(V4L2_CID_BRIGHTNESS, value); ctrls.set(V4L2_CID_CONTRAST, value); delayed->push(ctrls); } /* Process all queued controls. */ for (unsigned int i = 1; i < 16; i++) { int32_t value = 10 + i - 1; delayed->applyControls(i); ControlList result = delayed->get(i); int32_t brightness = result.get(V4L2_CID_BRIGHTNESS).get<int32_t>(); int32_t contrast = result.get(V4L2_CID_CONTRAST).get<int32_t>(); if (brightness != expected || contrast != expected) { cerr << "Failed multi queue" << " frame " << i << " brightness " << brightness << " contrast " << contrast << " expected " << expected << endl; return TestFail; } expected = i < maxDelay ? expected : value - 1; } return TestPass; } int run() override { int ret; /* Test single control without delay. */ ret = singleControlNoDelay(); if (ret) return ret; /* Test single control with delay. */ ret = singleControlWithDelay(); if (ret) return ret; /* Test dual controls with different delays. */ ret = dualControlsWithDelay(0); if (ret) return ret; /* Test dual controls with non-zero sequence start. */ ret = dualControlsWithDelay(10000); if (ret) return ret; /* Test dual controls with sequence number wraparound. */ ret = dualControlsWithDelay(UINT32_MAX - 50); if (ret) return ret; /* Test control values produced faster than consumed. */ ret = dualControlsMultiQueue(); if (ret) return ret; return TestPass; } private: std::unique_ptr<DeviceEnumerator> enumerator_; std::shared_ptr<MediaDevice> media_; std::unique_ptr<V4L2VideoDevice> dev_; }; TEST_REGISTER(DelayedControlsTest)