blob: 4ff3ab1cc80be11556ad7de710a172d302b3f0ab (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
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
|
// Copyright 2015 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.
#ifndef CHROMEOS_DBUS_AMPLIFIER_CLIENT_H_
#define CHROMEOS_DBUS_AMPLIFIER_CLIENT_H_
#include <stdint.h>
#include "base/macros.h"
#include "chromeos/chromeos_export.h"
#include "chromeos/dbus/dbus_client.h"
#include "chromeos/dbus/dbus_method_call_status.h"
namespace chromeos {
// A DBus client class for the org.chromium.Amplifier service.
class CHROMEOS_EXPORT AmplifierClient : public DBusClient {
public:
// Interface for observing amplifier events from an amplifier client.
class Observer {
public:
virtual ~Observer() {}
// Called when the Error signal is received.
virtual void OnError(int32_t error_code) = 0;
};
~AmplifierClient() override;
// Adds and removes observers for amplifier events.
virtual void AddObserver(Observer* observer) = 0;
virtual void RemoveObserver(Observer* observer) = 0;
// Factory function; creates a new instance which is owned by the caller.
// For normal usage, access the singleton via DBusThreadManager::Get().
static AmplifierClient* Create();
// Calls Initialize method.
// |callback| will be called with a DBusMethodCallStatus indicating whether
// the DBus method call succeeded, and a bool that is the return value from
// the DBus method.
virtual void Initialize(const BoolDBusMethodCallback& callback) = 0;
// Calls SetStandbyMode method.
// |callback| will be called with a DBusMethodCallStatus indicating whether
// the DBus method call succeeded.
virtual void SetStandbyMode(bool standby,
const VoidDBusMethodCallback& callback) = 0;
// Calls SetVolume method.
// |callback| will be called with a DBusMethodCallStatus indicating whether
// the DBus method call succeeded.
virtual void SetVolume(double db_spl,
const VoidDBusMethodCallback& callback) = 0;
protected:
// Create() should be used instead.
AmplifierClient();
private:
DISALLOW_COPY_AND_ASSIGN(AmplifierClient);
};
} // namespace chromeos
#endif // CHROMEOS_DBUS_AMPLIFIER_CLIENT_H_
|
