97646c945e
The DeviceMonitorLinux detects device change and sends the signal to SystemMonitor. This patch depends on http://codereview.chromium.org/10836004/ BUG=137799 Review URL: https://chromiumcodereview.appspot.com/10829073 git-svn-id: svn://svn.chromium.org/chrome/trunk/src@149266 0039d316-1c4b-4281-b951-d872f2087c98
88 lines
2.5 KiB
C++
88 lines
2.5 KiB
C++
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// libudev is used for monitoring device changes.
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#include "content/browser/device_monitor_linux.h"
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#include <libudev.h>
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#include <string>
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#include "base/system_monitor/system_monitor.h"
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#include "content/browser/udev_linux.h"
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#include "content/public/browser/browser_thread.h"
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namespace {
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struct SubsystemMap {
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base::SystemMonitor::DeviceType device_type;
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const char* subsystem;
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const char* devtype;
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};
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const char kAudioSubsystem[] = "sound";
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const char kVideoSubsystem[] = "video4linux";
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// Add more subsystems here for monitoring.
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const SubsystemMap kSubsystemMap[] = {
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{ base::SystemMonitor::DEVTYPE_AUDIO_CAPTURE, kAudioSubsystem, NULL },
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{ base::SystemMonitor::DEVTYPE_VIDEO_CAPTURE, kVideoSubsystem, NULL },
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};
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} // namespace
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namespace content {
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DeviceMonitorLinux::DeviceMonitorLinux() {
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DCHECK(BrowserThread::IsMessageLoopValid(BrowserThread::IO));
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BrowserThread::PostTask(BrowserThread::IO,
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FROM_HERE,
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base::Bind(&DeviceMonitorLinux::Initialize, base::Unretained(this)));
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}
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DeviceMonitorLinux::~DeviceMonitorLinux() {
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}
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void DeviceMonitorLinux::Initialize() {
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DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
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// We want to be notified of IO message loop destruction to delete |udev_|.
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MessageLoop::current()->AddDestructionObserver(this);
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std::vector<UdevLinux::UdevMonitorFilter> filters;
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for (size_t i = 0; i < arraysize(kSubsystemMap); ++i) {
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filters.push_back(content::UdevLinux::UdevMonitorFilter(
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kSubsystemMap[i].subsystem, kSubsystemMap[i].devtype));
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}
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udev_.reset(new UdevLinux(filters,
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base::Bind(&DeviceMonitorLinux::OnDevicesChanged,
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base::Unretained(this))));
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}
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void DeviceMonitorLinux::WillDestroyCurrentMessageLoop() {
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// Called on IO thread.
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udev_.reset();
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}
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void DeviceMonitorLinux::OnDevicesChanged(udev_device* device) {
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DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
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DCHECK(device);
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base::SystemMonitor::DeviceType device_type =
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base::SystemMonitor::DEVTYPE_UNKNOWN;
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std::string subsystem(udev_device_get_subsystem(device));
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for (size_t i = 0; i < arraysize(kSubsystemMap); ++i) {
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if (subsystem == kSubsystemMap[i].subsystem) {
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device_type = kSubsystemMap[i].device_type;
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break;
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}
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}
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DCHECK_NE(device_type, base::SystemMonitor::DEVTYPE_UNKNOWN);
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base::SystemMonitor::Get()->ProcessDevicesChanged(device_type);
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}
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} // namespace content
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