/* SPDX-License-Identifier: GPL-2.0-or-later */ /* * Copyright (C) 2019, Google Inc. * * message.cpp - Messages test */ #include #include #include #include #include #include #include "test.h" using namespace std; using namespace libcamera; class MessageReceiver : public Object { public: enum Status { NoMessage, InvalidThread, MessageReceived, }; MessageReceiver(Object *parent = nullptr) : Object(parent), status_(NoMessage) { } Status status() const { return status_; } void reset() { status_ = NoMessage; } protected: void message(Message *msg) { if (msg->type() != Message::None) { Object::message(msg); return; } if (thread() != Thread::current()) status_ = InvalidThread; else status_ = MessageReceived; } private: Status status_; }; class RecursiveMessageReceiver : public Object { public: RecursiveMessageReceiver() : child_(this), success_(false) { } bool success() const { return success_; } protected: void message([[maybe_unused]] Message *msg) { if (msg->type() != Message::None) { Object::message(msg); return; } child_.postMessage(std::make_unique(Message::None)); /* * If the child has already received the message, something is * wrong. */ if (child_.status() != MessageReceiver::NoMessage) return; Thread::current()->dispatchMessages(Message::None); /* The child should now have received the message. */ if (child_.status() == MessageReceiver::MessageReceived) success_ = true; } private: MessageReceiver child_; bool success_; }; class SlowMessageReceiver : public Object { protected: void message(Message *msg) { if (msg->type() != Message::None) { Object::message(msg); return; } /* * Don't access any member of the object here (including the * vtable) as the object will be deleted by the main thread * while we're sleeping. */ this_thread::sleep_for(chrono::milliseconds(100)); } }; class MessageTest : public Test { protected: int run() { Message::Type msgType[2] = { Message::registerMessageType(), Message::registerMessageType(), }; if (msgType[0] != Message::UserMessage || msgType[1] != Message::UserMessage + 1) { cout << "Failed to register message types" << endl; return TestFail; } MessageReceiver receiver; receiver.moveToThread(&thread_); thread_.start(); receiver.postMessage(std::make_unique(Message::None)); this_thread::sleep_for(chrono::milliseconds(100)); switch (receiver.status()) { case MessageReceiver::NoMessage: cout << "No message received" << endl; return TestFail; case MessageReceiver::InvalidThread: cout << "Message received in incorrect thread" << endl; return TestFail; default: break; } /* * Test for races between message delivery and object deletion. * Failures result in assertion errors, there is no need for * explicit checks. */ SlowMessageReceiver *slowReceiver = new SlowMessageReceiver(); slowReceiver->moveToThread(&thread_); slowReceiver->postMessage(std::make_unique(Message::None)); this_thread::sleep_for(chrono::milliseconds(10)); delete slowReceiver; this_thread::sleep_for(chrono::milliseconds(100)); /* * Test recursive calls to Thread::dispatchMessages(). Messages * should be delivered correctly, without crashes or memory * leaks. Two messages need to be posted to ensure we don't only * test the simple case of a queue containing a single message. */ std::unique_ptr recursiveReceiver = std::make_unique(); recursiveReceiver->moveToThread(&thread_); recursiveReceiver->postMessage(std::make_unique(Message::None)); recursiveReceiver->postMessage(std::make_unique(Message::UserMessage)); this_thread::sleep_for(chrono::milliseconds(10)); if (!recursiveReceiver->success()) { cout << "Recursive message delivery failed" << endl; return TestFail; } return TestPass; } void cleanup() { thread_.exit(0); thread_.wait(); } private: Thread thread_; }; TEST_REGISTER(MessageTest) f='#n37'>37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300

/* SPDX-License-Identifier: LGPL-2.1-or-later */
/*
 * Copyright (C) 2019, Google Inc.
 *
 * v4l2_camera.cpp - V4L2 compatibility camera
 */

#include "v4l2_camera.h"

#include <errno.h>
#include <unistd.h>

#include <libcamera/base/log.h>

using namespace libcamera;

LOG_DECLARE_CATEGORY(V4L2Compat)

V4L2Camera::V4L2Camera(std::shared_ptr<Camera> camera)
	: camera_(camera), isRunning_(false), bufferAllocator_(nullptr),
	  efd_(-1), bufferAvailableCount_(0)
{
	camera_->requestCompleted.connect(this, &V4L2Camera::requestComplete);
}

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

int V4L2Camera::open(StreamConfiguration *streamConfig)
{
	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_);

	*streamConfig = config_->at(0);