/* SPDX-License-Identifier: GPL-2.0-or-later */ /* * Copyright (C) 2019, Google Inc. * * signal.cpp - Signal test */ #include #include #include #include #include "test.h" using namespace std; using namespace libcamera; static int valueStatic_ = 0; static void slotStatic(int value) { valueStatic_ = value; } static int slotStaticReturn() { return 0; } class SlotObject : public Object { public: void slot() { valueStatic_ = 1; } }; class BaseClass { public: /* * A virtual method is required in the base class, otherwise the compiler * will always store Object before BaseClass in memory. */ virtual ~BaseClass() { } unsigned int data_[32]; }; class SlotMulti : public BaseClass, public Object { public: void slot() { valueStatic_ = 1; } }; class SignalTest : public Test { protected: void slotVoid() { called_ = true; } void slotDisconnect() { called_ = true; signalVoid_.disconnect(this, &SignalTest::slotDisconnect); } void slotInteger1(int value) { values_[0] = value; } void slotInteger2(int value) { values_[1] = value; } void slotMultiArgs(int value, const std::string &name) { values_[2] = value; name_ = name; } int slotReturn() { return 0; } int init() { return 0; } int run() { /* ----------------- Signal -> !Object tests ---------------- */ /* Test signal emission and reception. */ called_ = false; signalVoid_.connect(this, &SignalTest::slotVoid); signalVoid_.emit(); if (!called_) { cout << "Signal emission test failed" << endl; return TestFail; } /* Test signal with parameters. */ values_[2] = 0; name_.clear(); signalMultiArgs_.connect(this, &SignalTest::slotMultiArgs); signalMultiArgs_.emit(42, "H2G2"); if (values_[2] != 42 || name_ != "H2G2") { cout << "Signal parameters test failed" << endl; return TestFail; } /* Test signal connected to multiple slots. */ memset(values_, 0, sizeof(values_)); valueStatic_ = 0; signalInt_.connect(this, &SignalTest::slotInteger1); signalInt_.connect(this, &SignalTest::slotInteger2); signalInt_.connect(&slotStatic); signalInt_.emit(42); if (values_[0] != 42 || values_[1] != 42 || values_[2] != 0 || valueStatic_ != 42) { cout << "Signal multi slot test failed" << endl; return TestFail; } /* Test disconnection of a single slot. */ memset(values_, 0, sizeof(values_)); signalInt_.disconnect(this, &SignalTest::slotInteger2); signalInt_.emit(42); if (values_[0] != 42 || values_[1] != 0 || values_[2] != 0) { cout << "Signal slot disconnection test failed" << endl; return TestFail; } /* Test disconnection of a whole object. */ memset(values_, 0, sizeof(values_)); signalInt_.disconnect(this); signalInt_.emit(42); if (values_[0] != 0 || values_[1] != 0 || values_[2] != 0) { cout << "Signal object disconnection test failed" << endl; return TestFail; } /* Test disconnection of a whole signal. */ memset(values_, 0, sizeof(values_)); signalInt_.connect(this, &SignalTest::slotInteger1); signalInt_.connect(this, &SignalTest::slotInteger2); signalInt_.disconnect(); signalInt_.emit(42); if (values_[0] != 0 || values_[1] != 0 || values_[2] != 0) { cout << "Signal object disconnection test failed" << endl; return TestFail; } /* Test disconnection from slot. */ signalVoid_.disconnect(); signalVoid_.connect(this, &SignalTest::slotDisconnect); signalVoid_.emit(); called_ = false; signalVoid_.emit(); if (called_) { cout << "Signal disconnection from slot test failed" << endl; return TestFail; } /* * Test connecting to slots that return a value. This targets * compilation, there's no need to check runtime results. */ signalVoid_.connect(slotStaticReturn); signalVoid_.connect(this, &SignalTest::slotReturn); /* ----------------- Signal -> Object tests ----------------- */ /* * Test automatic disconnection on object deletion. Connect the * slot twice to ensure all instances are disconnected. */ signalVoid_.disconnect(); SlotObject *slotObject = new SlotObject(); signalVoid_.connect(slotObject, &SlotObject::slot); signalVoid_.connect(slotObject, &SlotObject::slot); delete slotObject; valueStatic_ = 0; signalVoid_.emit(); if (valueStatic_ != 0) { cout << "Signal disconnection on object deletion test failed" << endl; return TestFail; } /* * Test that signal deletion disconnects objects. This shall * not generate any valgrind warning. */ Signal<> *dynamicSignal = new Signal<>(); slotObject = new SlotObject(); dynamicSignal->connect(slotObject, &SlotObject::slot); delete dynamicSignal; delete slotObject; /* * Test that signal manual disconnection from Object removes * the signal for the object. This shall not generate any * valgrind warning. */ dynamicSignal = new Signal<>(); slotObject = new SlotObject(); dynamicSignal->connect(slotObject, &SlotObject::slot); dynamicSignal->disconnect(slotObject); delete dynamicSignal; delete slotObject; /* * Test that signal manual disconnection from all slots removes * the signal for the object. This shall not generate any * valgrind warning. */ dynamicSignal = new Signal<>(); slotObject = new SlotObject(); dynamicSignal->connect(slotObject, &SlotObject::slot); dynamicSignal->disconnect(); delete dynamicSignal; delete slotObject; /* Exercise the Object slot code paths. */ slotObject = new SlotObject(); signalVoid_.connect(slotObject, &SlotObject::slot); valueStatic_ = 0; signalVoid_.emit(); if (valueStatic_ == 0) { cout << "Signal delivery for Object test failed" << endl; return TestFail; } delete slotObject; /* --------- Signal -> Object (multiple inheritance) -------- */ /* * Test automatic disconnection on object deletion. Connect the * slot twice to ensure all instances are disconnected. */ signalVoid_.disconnect(); SlotMulti *slotMulti = new SlotMulti(); signalVoid_.connect(slotMulti, &SlotMulti::slot); signalVoid_.connect(slotMulti, &SlotMulti::slot); delete slotMulti; valueStatic_ = 0; signalVoid_.emit(); if (valueStatic_ != 0) { cout << "Signal disconnection on object deletion test failed" << endl; return TestFail; } /* * Test that signal deletion disconnects objects. This shall * not generate any valgrind warning. */ dynamicSignal = new Signal<>(); slotMulti = new SlotMulti(); dynamicSignal->connect(slotMulti, &SlotMulti::slot); delete dynamicSignal; delete slotMulti; /* Exercise the Object slot code paths. */ slotMulti = new SlotMulti(); signalVoid_.connect(slotMulti, &SlotMulti::slot); valueStatic_ = 0; signalVoid_.emit(); if (valueStatic_ == 0) { cout << "Signal delivery for Object test failed" << endl; return TestFail; } delete slotMulti; return TestPass; } void cleanup() { } private: Signal<> signalVoid_; Signal signalInt_; Signal signalMultiArgs_; bool called_; int values_[3]; std::string name_; }; TEST_REGISTER(SignalTest) 29' href='#n129'>129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213

/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 * Copyright (C) 2019, Google Inc.
 *
 * v4l2_camera.cpp - V4L2 compatibility camera
 */

#include "v4l2_camera.h"

#include <errno.h>

#include "log.h"

using namespace libcamera;

LOG_DECLARE_CATEGORY(V4L2Compat);

V4L2Camera::V4L2Camera(std::shared_ptr<Camera> camera)
	: camera_(camera), isRunning_(false), bufferAllocator_(nullptr)
{
	camera_->requestCompleted.connect(this, &V4L2Camera::requestComplete);
}

V4L2Camera::~V4L2Camera()
{
	close();
}

int V4L2Camera::open()
{
	/* \todo Support multiple open. */
	if (camera_->acquire() < 0) {
		LOG(V4L2Compat, Error) << "Failed to acquire camera";
		return -EINVAL;
	}

	config_ = camera_->generateConfiguration({ StreamRole::Viewfinder });
	if (!config_) {
		camera_->release();
		return -EINVAL;
	}

	bufferAllocator_ = new FrameBufferAllocator(camera_);

	return 0;
}

void V4L2Camera::close()
{
	delete bufferAllocator_;
	bufferAllocator_ = nullptr;

	camera_->release();
}

void V4L2Camera::getStreamConfig(StreamConfiguration *streamConfig)
{
	*streamConfig = config_->at(0);
}

std::vector<V4L2Camera::Buffer> V4L2Camera::completedBuffers()
{
	std::vector<Buffer> v;

	bufferLock_.lock();
	for (std::unique_ptr<Buffer> &metadata : completedBuffers_)
		v.push_back(*metadata.get());
	completedBuffers_.clear();
	bufferLock_.unlock();

	return v;
}

void V4L2Camera::requestComplete(Request *request)
{
	if (request->status() == Request::RequestCancelled)
		return;

	/* We only have one stream at the moment. */
	bufferLock_.lock();
	FrameBuffer *buffer = request->buffers().begin()->second;
	std::unique_ptr<Buffer> metadata =
		std::make_unique<Buffer>(request->cookie(), buffer->metadata());
	completedBuffers_.push_back(std::move(metadata));
	bufferLock_.unlock();

	bufferSema_.release();
}

int V4L2Camera::configure(StreamConfiguration *streamConfigOut,
			  const Size &size, const PixelFormat &pixelformat,
			  unsigned int bufferCount)
{
	StreamConfiguration &streamConfig = config_->at(0);
	streamConfig.size.width = size.width;
	streamConfig.size.height = size.height;
	streamConfig.pixelFormat = pixelformat;
	streamConfig.bufferCount = bufferCount;
	/* \todo memoryType (interval vs external) */

	CameraConfiguration::Status validation = config_->validate();
	if (validation == CameraConfiguration::Invalid) {
		LOG(V4L2Compat, Debug) << "Configuration invalid";
		return -EINVAL;
	}
	if (validation == CameraConfiguration::Adjusted)
		LOG(V4L2Compat, Debug) << "Configuration adjusted";

	LOG(V4L2Compat, Debug) << "Validated configuration is: "
			      << streamConfig.toString();

	int ret = camera_->configure(config_.get());
	if (ret < 0)
		return ret;

	*streamConfigOut = config_->at(0);

	return 0;
}

int V4L2Camera::allocBuffers(unsigned int count)
{
	Stream *stream = *camera_->streams().begin();

	return bufferAllocator_->allocate(stream);
}

void V4L2Camera::freeBuffers()
{
	Stream *stream = *camera_->streams().begin();
	bufferAllocator_->free(stream);
}

FileDescriptor V4L2Camera::getBufferFd(unsigned int index)
{
	Stream *stream = *camera_->streams().begin();
	const std::vector<std::unique_ptr<FrameBuffer>> &buffers =
		bufferAllocator_->buffers(stream);

	if (buffers.size() <= index)
		return FileDescriptor();

	return buffers[index]->planes()[0].fd;
}

int V4L2Camera::streamOn()
{
	if (isRunning_)
		return 0;

	int ret = camera_->start();
	if (ret < 0)
		return ret == -EACCES ? -EBUSY : ret;

	isRunning_ = true;

	for (std::unique_ptr<Request> &req : pendingRequests_) {
		/* \todo What should we do if this returns -EINVAL? */
		ret = camera_->queueRequest(req.release());
		if (ret < 0)
			return ret == -EACCES ? -EBUSY : ret;
	}

	pendingRequests_.clear();

	return 0;
}

int V4L2Camera::streamOff()
{
	/* \todo Restore buffers to reqbufs state? */
	if (!isRunning_)
		return 0;

	int ret = camera_->stop();
	if (ret < 0)
		return ret == -EACCES ? -EBUSY : ret;

	isRunning_ = false;

	return 0;
}

int V4L2Camera::qbuf(unsigned int index)
{
	std::unique_ptr<Request> request =
		std::unique_ptr<Request>(camera_->createRequest(index));
	if (!request) {
		LOG(V4L2Compat, Error) << "Can't create request";
		return -ENOMEM;
	}

	Stream *stream = config_->at(0).stream();
	FrameBuffer *buffer = bufferAllocator_->buffers(stream)[index].get();
	int ret = request->addBuffer(stream, buffer);
	if (ret < 0) {
		LOG(V4L2Compat, Error) << "Can't set buffer for request";
		return -ENOMEM;
	}

	if (!isRunning_) {
		pendingRequests_.push_back(std::move(request));
		return 0;
	}

	ret = camera_->queueRequest(request.release());
	if (ret < 0) {
		LOG(V4L2Compat, Error) << "Can't queue request";
		return ret == -EACCES ? -EBUSY : ret;
	}

	return 0;
}