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
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
|
// 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.
#include <MMDeviceAPI.h>
#include <mmsystem.h>
#include <Functiondiscoverykeys_devpkey.h> // MMDeviceAPI.h must come first
#include "media/audio/win/audio_manager_win.h"
#include "base/basictypes.h"
#include "base/logging.h"
#include "base/strings/utf_string_conversions.h"
#include "base/win/scoped_co_mem.h"
#include "base/win/scoped_comptr.h"
#include "base/win/scoped_propvariant.h"
using base::win::ScopedComPtr;
using base::win::ScopedCoMem;
// Taken from Mmddk.h.
#define DRV_RESERVED 0x0800
#define DRV_QUERYFUNCTIONINSTANCEID (DRV_RESERVED + 17)
#define DRV_QUERYFUNCTIONINSTANCEIDSIZE (DRV_RESERVED + 18)
namespace media {
static bool GetDeviceNamesWinImpl(EDataFlow data_flow,
AudioDeviceNames* device_names) {
// It is assumed that this method is called from a COM thread, i.e.,
// CoInitializeEx() is not called here again to avoid STA/MTA conflicts.
ScopedComPtr<IMMDeviceEnumerator> enumerator;
HRESULT hr = enumerator.CreateInstance(__uuidof(MMDeviceEnumerator), NULL,
CLSCTX_INPROC_SERVER);
DCHECK_NE(CO_E_NOTINITIALIZED, hr);
if (FAILED(hr)) {
LOG(WARNING) << "Failed to create IMMDeviceEnumerator: " << std::hex << hr;
return false;
}
// Generate a collection of active audio endpoint devices.
// This method will succeed even if all devices are disabled.
ScopedComPtr<IMMDeviceCollection> collection;
hr = enumerator->EnumAudioEndpoints(data_flow,
DEVICE_STATE_ACTIVE,
collection.Receive());
if (FAILED(hr))
return false;
// Retrieve the number of active devices.
UINT number_of_active_devices = 0;
collection->GetCount(&number_of_active_devices);
if (number_of_active_devices == 0)
return true;
AudioDeviceName device;
// Loop over all active devices and add friendly name and
// unique ID to the |device_names| list.
for (UINT i = 0; i < number_of_active_devices; ++i) {
// Retrieve unique name of endpoint device.
// Example: "{0.0.1.00000000}.{8db6020f-18e3-4f25-b6f5-7726c9122574}".
ScopedComPtr<IMMDevice> audio_device;
hr = collection->Item(i, audio_device.Receive());
if (FAILED(hr))
continue;
// Store the unique name.
ScopedCoMem<WCHAR> endpoint_device_id;
audio_device->GetId(&endpoint_device_id);
device.unique_id =
base::WideToUTF8(static_cast<WCHAR*>(endpoint_device_id));
// Retrieve user-friendly name of endpoint device.
// Example: "Microphone (Realtek High Definition Audio)".
ScopedComPtr<IPropertyStore> properties;
hr = audio_device->OpenPropertyStore(STGM_READ, properties.Receive());
if (SUCCEEDED(hr)) {
base::win::ScopedPropVariant friendly_name;
hr = properties->GetValue(PKEY_Device_FriendlyName,
friendly_name.Receive());
// Store the user-friendly name.
if (SUCCEEDED(hr) &&
friendly_name.get().vt == VT_LPWSTR && friendly_name.get().pwszVal) {
device.device_name = base::WideToUTF8(friendly_name.get().pwszVal);
}
}
// Add combination of user-friendly and unique name to the output list.
device_names->push_back(device);
}
return true;
}
// The waveform API is weird in that it has completely separate but
// almost identical functions and structs for input devices vs. output
// devices. We deal with this by implementing the logic as a templated
// function that takes the functions and struct type to use as
// template parameters.
template <UINT (__stdcall *NumDevsFunc)(),
typename CAPSSTRUCT,
MMRESULT (__stdcall *DevCapsFunc)(UINT_PTR, CAPSSTRUCT*, UINT)>
static bool GetDeviceNamesWinXPImpl(AudioDeviceNames* device_names) {
// Retrieve the number of active waveform input devices.
UINT number_of_active_devices = NumDevsFunc();
if (number_of_active_devices == 0)
return true;
AudioDeviceName device;
CAPSSTRUCT capabilities;
MMRESULT err = MMSYSERR_NOERROR;
// Loop over all active capture devices and add friendly name and
// unique ID to the |device_names| list. Note that, for Wave on XP,
// the "unique" name will simply be a copy of the friendly name since
// there is no safe method to retrieve a unique device name on XP.
for (UINT i = 0; i < number_of_active_devices; ++i) {
// Retrieve the capabilities of the specified waveform-audio input device.
err = DevCapsFunc(i, &capabilities, sizeof(capabilities));
if (err != MMSYSERR_NOERROR)
continue;
// Store the user-friendly name. Max length is MAXPNAMELEN(=32)
// characters and the name cane be truncated on XP.
// Example: "Microphone (Realtek High Defini".
device.device_name = base::WideToUTF8(capabilities.szPname);
// Store the "unique" name (we use same as friendly name on Windows XP).
device.unique_id = device.device_name;
// Add combination of user-friendly and unique name to the output list.
device_names->push_back(device);
}
return true;
}
bool GetInputDeviceNamesWin(AudioDeviceNames* device_names) {
return GetDeviceNamesWinImpl(eCapture, device_names);
}
bool GetOutputDeviceNamesWin(AudioDeviceNames* device_names) {
return GetDeviceNamesWinImpl(eRender, device_names);
}
bool GetInputDeviceNamesWinXP(AudioDeviceNames* device_names) {
return GetDeviceNamesWinXPImpl<
waveInGetNumDevs, WAVEINCAPSW, waveInGetDevCapsW>(device_names);
}
bool GetOutputDeviceNamesWinXP(AudioDeviceNames* device_names) {
return GetDeviceNamesWinXPImpl<
waveOutGetNumDevs, WAVEOUTCAPSW, waveOutGetDevCapsW>(device_names);
}
std::string ConvertToWinXPInputDeviceId(const std::string& device_id) {
UINT number_of_active_devices = waveInGetNumDevs();
MMRESULT result = MMSYSERR_NOERROR;
UINT i = 0;
for (; i < number_of_active_devices; ++i) {
size_t size = 0;
// Get the size (including the terminating NULL) of the endpoint ID of the
// waveIn device.
result = waveInMessage(reinterpret_cast<HWAVEIN>(i),
DRV_QUERYFUNCTIONINSTANCEIDSIZE,
reinterpret_cast<DWORD_PTR>(&size), NULL);
if (result != MMSYSERR_NOERROR)
continue;
ScopedCoMem<WCHAR> id;
id.Reset(static_cast<WCHAR*>(CoTaskMemAlloc(size)));
if (!id)
continue;
// Get the endpoint ID string for this waveIn device.
result = waveInMessage(
reinterpret_cast<HWAVEIN>(i), DRV_QUERYFUNCTIONINSTANCEID,
reinterpret_cast<DWORD_PTR>(static_cast<WCHAR*>(id)), size);
if (result != MMSYSERR_NOERROR)
continue;
std::string utf8_id = base::WideToUTF8(static_cast<WCHAR*>(id));
// Check whether the endpoint ID string of this waveIn device matches that
// of the audio endpoint device.
if (device_id == utf8_id)
break;
}
// If a matching waveIn device was found, convert the unique endpoint ID
// string to a standard friendly name with max 32 characters.
if (i < number_of_active_devices) {
WAVEINCAPS capabilities;
result = waveInGetDevCaps(i, &capabilities, sizeof(capabilities));
if (result == MMSYSERR_NOERROR)
return base::WideToUTF8(capabilities.szPname);
}
return std::string();
}
} // namespace media
|
