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
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
|
// 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.
// Client code to talk to the Media Transfer Protocol daemon. The MTP daemon is
// responsible for communicating with PTP / MTP capable devices like cameras
// and smartphones.
#ifndef DEVICE_MEDIA_TRANSFER_PROTOCOL_MEDIA_TRANSFER_PROTOCOL_DAEMON_CLIENT_H_
#define DEVICE_MEDIA_TRANSFER_PROTOCOL_MEDIA_TRANSFER_PROTOCOL_DAEMON_CLIENT_H_
#include <string>
#include <vector>
#include "base/basictypes.h"
#include "base/callback.h"
#include "build/build_config.h"
#if !defined(OS_LINUX)
#error "Only used on Linux and ChromeOS"
#endif
class MtpFileEntry;
class MtpStorageInfo;
namespace dbus {
class Bus;
}
namespace device {
// A class to make the actual DBus calls for mtpd service.
// This class only makes calls, result/error handling should be done
// by callbacks.
class MediaTransferProtocolDaemonClient {
public:
// A callback to be called when DBus method call fails.
typedef base::Callback<void()> ErrorCallback;
// A callback to handle the result of EnumerateAutoMountableDevices.
// The argument is the enumerated storage names.
typedef base::Callback<void(const std::vector<std::string>& storage_names)
> EnumerateStoragesCallback;
// A callback to handle the result of GetStorageInfo.
// The argument is the information about the specified storage.
typedef base::Callback<void(const MtpStorageInfo& storage_info)
> GetStorageInfoCallback;
// A callback to handle the result of OpenStorage.
// The argument is the returned handle.
typedef base::Callback<void(const std::string& handle)> OpenStorageCallback;
// A callback to handle the result of CloseStorage.
typedef base::Callback<void()> CloseStorageCallback;
// A callback to handle the result of ReadDirectoryByPath/Id.
// The argument is a vector of file entries.
typedef base::Callback<void(const std::vector<MtpFileEntry>& file_entries)
> ReadDirectoryCallback;
// A callback to handle the result of ReadFileChunkByPath/Id.
// The argument is a string containing the file data.
typedef base::Callback<void(const std::string& data)> ReadFileCallback;
// A callback to handle the result of GetFileInfoByPath/Id.
// The argument is a file entry.
typedef base::Callback<void(const MtpFileEntry& file_entry)
> GetFileInfoCallback;
// A callback to handle storage attach/detach events.
// The first argument is true for attach, false for detach.
// The second argument is the storage name.
typedef base::Callback<void(bool is_attach,
const std::string& storage_name)
> MTPStorageEventHandler;
virtual ~MediaTransferProtocolDaemonClient();
// Calls EnumerateStorages method. |callback| is called after the
// method call succeeds, otherwise, |error_callback| is called.
virtual void EnumerateStorages(
const EnumerateStoragesCallback& callback,
const ErrorCallback& error_callback) = 0;
// Calls GetStorageInfo method. |callback| is called after the method call
// succeeds, otherwise, |error_callback| is called.
virtual void GetStorageInfo(const std::string& storage_name,
const GetStorageInfoCallback& callback,
const ErrorCallback& error_callback) = 0;
// Calls OpenStorage method. |callback| is called after the method call
// succeeds, otherwise, |error_callback| is called.
// OpenStorage returns a handle in |callback|.
virtual void OpenStorage(const std::string& storage_name,
const std::string& mode,
const OpenStorageCallback& callback,
const ErrorCallback& error_callback) = 0;
// Calls CloseStorage method. |callback| is called after the method call
// succeeds, otherwise, |error_callback| is called.
// |handle| comes from a OpenStorageCallback.
virtual void CloseStorage(const std::string& handle,
const CloseStorageCallback& callback,
const ErrorCallback& error_callback) = 0;
// Calls ReadDirectoryByPath method. |callback| is called after the method
// call succeeds, otherwise, |error_callback| is called.
virtual void ReadDirectoryByPath(const std::string& handle,
const std::string& path,
const ReadDirectoryCallback& callback,
const ErrorCallback& error_callback) = 0;
// Calls ReadDirectoryById method. |callback| is called after the method
// call succeeds, otherwise, |error_callback| is called.
// |file_id| is a MTP-device specific id for a file.
virtual void ReadDirectoryById(const std::string& handle,
uint32 file_id,
const ReadDirectoryCallback& callback,
const ErrorCallback& error_callback) = 0;
// Calls ReadFileChunkByPath method. |callback| is called after the method
// call succeeds, otherwise, |error_callback| is called.
// |bytes_to_read| cannot exceed 1 MiB.
virtual void ReadFileChunkByPath(const std::string& handle,
const std::string& path,
uint32 offset,
uint32 bytes_to_read,
const ReadFileCallback& callback,
const ErrorCallback& error_callback) = 0;
// TODO(thestig) Remove this in the near future if we don't see anyone using
// it.
// Calls ReadFilePathById method. |callback| is called after the method call
// succeeds, otherwise, |error_callback| is called.
// |file_id| is a MTP-device specific id for a file.
// |bytes_to_read| cannot exceed 1 MiB.
virtual void ReadFileChunkById(const std::string& handle,
uint32 file_id,
uint32 offset,
uint32 bytes_to_read,
const ReadFileCallback& callback,
const ErrorCallback& error_callback) = 0;
// Calls GetFileInfoByPath method. |callback| is called after the method
// call succeeds, otherwise, |error_callback| is called.
virtual void GetFileInfoByPath(const std::string& handle,
const std::string& path,
const GetFileInfoCallback& callback,
const ErrorCallback& error_callback) = 0;
// Calls GetFileInfoById method. |callback| is called after the method
// call succeeds, otherwise, |error_callback| is called.
// |file_id| is a MTP-device specific id for a file.
virtual void GetFileInfoById(const std::string& handle,
uint32 file_id,
const GetFileInfoCallback& callback,
const ErrorCallback& error_callback) = 0;
// Registers given callback for events.
// |storage_event_handler| is called when a mtp storage attach or detach
// signal is received.
virtual void SetUpConnections(const MTPStorageEventHandler& handler) = 0;
// Factory function, creates a new instance and returns ownership.
// For normal usage, set |is_stub| to false.
static MediaTransferProtocolDaemonClient* Create(dbus::Bus* bus,
bool is_stub);
protected:
// Create() should be used instead.
MediaTransferProtocolDaemonClient();
private:
DISALLOW_COPY_AND_ASSIGN(MediaTransferProtocolDaemonClient);
};
} // namespace device
#endif // DEVICE_MEDIA_TRANSFER_PROTOCOL_MEDIA_TRANSFER_PROTOCOL_DAEMON_CLIENT_H_
|