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Unified Diff: base/system_monitor/system_monitor.h

Issue 9580018: Add media device attach notification mechanism. (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: Patch Set 1 again Created 8 years, 10 months ago
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Index: base/system_monitor/system_monitor.h
diff --git a/base/system_monitor/system_monitor.h b/base/system_monitor/system_monitor.h
index 7684523616e0bd787e3a30f5ded9c40e1f7b5371..3f73b15aacd98d1ed5b55f058129a91df15ae01e 100644
--- a/base/system_monitor/system_monitor.h
+++ b/base/system_monitor/system_monitor.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
@@ -6,6 +6,8 @@
#define BASE_SYSTEM_MONITOR_SYSTEM_MONITOR_H_
#pragma once
+#include <string>
+
#include "base/base_export.h"
#include "base/basictypes.h"
#include "build/build_config.h"
@@ -28,6 +30,8 @@
#include <IOKit/IOMessage.h>
#endif // OS_MACOSX
+class FilePath;
+
namespace base {
// Class for monitoring various system-related subsystems
@@ -42,6 +46,8 @@ class BASE_EXPORT SystemMonitor {
RESUME_EVENT // The system is being resumed.
};
+ typedef unsigned int DeviceIdType;
+
// Create SystemMonitor. Only one SystemMonitor instance per application
// is allowed.
SystemMonitor();
@@ -93,8 +99,19 @@ class BASE_EXPORT SystemMonitor {
class BASE_EXPORT DevicesChangedObserver {
public:
// Notification that the devices connected to the system have changed.
+ // This is only implemented on Windows currently.
virtual void OnDevicesChanged() {}
+ // When a media device is attached or detached, one of these two events
+ // is triggered.
+ // TODO(vandebo) Pass an appropriate device identifier or way to interact
+ // with the devices instead of FilePath.
+ virtual void OnMediaDeviceAttached(const DeviceIdType& id,
+ const std::string& name,
+ const FilePath& path) {}
+
+ virtual void OnMediaDeviceDetached(const DeviceIdType& id) {}
+
protected:
virtual ~DevicesChangedObserver() {}
};
@@ -123,6 +140,10 @@ class BASE_EXPORT SystemMonitor {
// Cross-platform handling of a device change event.
void ProcessDevicesChanged();
+ void ProcessMediaDeviceAttached(const DeviceIdType& id,
+ const std::string& name,
+ const FilePath& path);
+ void ProcessMediaDeviceDetached(const DeviceIdType& id);
private:
#if defined(OS_MACOSX)
@@ -141,6 +162,10 @@ class BASE_EXPORT SystemMonitor {
// Functions to trigger notifications.
void NotifyDevicesChanged();
+ void NotifyMediaDeviceAttached(const DeviceIdType& id,
+ const std::string& name,
+ const FilePath& path);
+ void NotifyMediaDeviceDetached(const DeviceIdType& id);
void NotifyPowerStateChange();
void NotifySuspend();
void NotifyResume();
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