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
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
|
/*
* This file is part of mpv.
*
* Original author: Jonathan Yong <10walls@gmail.com>
*
* mpv is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* mpv is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with mpv. If not, see <http://www.gnu.org/licenses/>.
*/
#include <wchar.h>
#include "ao_wasapi.h"
static HRESULT STDMETHODCALLTYPE sIMMNotificationClient_QueryInterface(
IMMNotificationClient* This, REFIID riid, void **ppvObject)
{
// Compatible with IMMNotificationClient and IUnknown
if (IsEqualGUID(&IID_IMMNotificationClient, riid) ||
IsEqualGUID(&IID_IUnknown, riid))
{
*ppvObject = (void *)This;
return S_OK;
} else {
*ppvObject = NULL;
return E_NOINTERFACE;
}
}
// these are required, but not actually used
static ULONG STDMETHODCALLTYPE sIMMNotificationClient_AddRef(
IMMNotificationClient *This)
{
return 1;
}
// MSDN says it should free itself, but we're static
static ULONG STDMETHODCALLTYPE sIMMNotificationClient_Release(
IMMNotificationClient *This)
{
return 1;
}
static HRESULT STDMETHODCALLTYPE sIMMNotificationClient_OnDeviceStateChanged(
IMMNotificationClient *This,
LPCWSTR pwstrDeviceId,
DWORD dwNewState)
{
change_notify *change = (change_notify *)This;
struct ao *ao = change->ao;
if (change->is_hotplug) {
MP_VERBOSE(ao,
"OnDeviceStateChanged triggered: sending hotplug event\n");
ao_hotplug_event(ao);
} else if (pwstrDeviceId && !wcscmp(pwstrDeviceId, change->monitored)) {
switch (dwNewState) {
case DEVICE_STATE_DISABLED:
case DEVICE_STATE_NOTPRESENT:
case DEVICE_STATE_UNPLUGGED:
MP_VERBOSE(ao, "OnDeviceStateChanged triggered on device %ls: "
"requesting ao reload\n", pwstrDeviceId);
ao_request_reload(ao);
break;
case DEVICE_STATE_ACTIVE:
break;
}
}
return S_OK;
}
static HRESULT STDMETHODCALLTYPE sIMMNotificationClient_OnDeviceAdded(
IMMNotificationClient *This,
LPCWSTR pwstrDeviceId)
{
change_notify *change = (change_notify *)This;
struct ao *ao = change->ao;
if (change->is_hotplug) {
MP_VERBOSE(ao, "OnDeviceAdded triggered: sending hotplug event\n");
ao_hotplug_event(ao);
}
return S_OK;
}
// maybe MPV can go over to the preferred device once it is plugged in?
static HRESULT STDMETHODCALLTYPE sIMMNotificationClient_OnDeviceRemoved(
IMMNotificationClient *This,
LPCWSTR pwstrDeviceId)
{
change_notify *change = (change_notify *)This;
struct ao *ao = change->ao;
if (change->is_hotplug) {
MP_VERBOSE(ao, "OnDeviceRemoved triggered: sending hotplug event\n");
ao_hotplug_event(ao);
} else if (pwstrDeviceId && !wcscmp(pwstrDeviceId, change->monitored)) {
MP_VERBOSE(ao, "OnDeviceRemoved triggered for device %ls: "
"requesting ao reload\n", pwstrDeviceId);
ao_request_reload(ao);
}
return S_OK;
}
static HRESULT STDMETHODCALLTYPE sIMMNotificationClient_OnDefaultDeviceChanged(
IMMNotificationClient *This,
EDataFlow flow,
ERole role,
LPCWSTR pwstrDeviceId)
{
change_notify *change = (change_notify *)This;
struct ao *ao = change->ao;
// don't care about "eCapture" or non-"eMultimedia" roles
if (flow == eCapture || role != eMultimedia) return S_OK;
if (change->is_hotplug) {
MP_VERBOSE(ao,
"OnDefaultDeviceChanged triggered: sending hotplug event\n");
ao_hotplug_event(ao);
} else {
// stay on the device the user specified
bstr device = wasapi_get_specified_device_string(ao);
if (device.len) {
MP_VERBOSE(ao, "OnDefaultDeviceChanged triggered: "
"staying on specified device %.*s\n", BSTR_P(device));
return S_OK;
}
// don't reload if already on the new default
if (pwstrDeviceId && !wcscmp(pwstrDeviceId, change->monitored)) {
MP_VERBOSE(ao, "OnDefaultDeviceChanged triggered: "
"already using default device, no reload required\n");
return S_OK;
}
// if we got here, we need to reload
MP_VERBOSE(ao,
"OnDefaultDeviceChanged triggered: requesting ao reload\n");
ao_request_reload(ao);
}
return S_OK;
}
static HRESULT STDMETHODCALLTYPE sIMMNotificationClient_OnPropertyValueChanged(
IMMNotificationClient *This,
LPCWSTR pwstrDeviceId,
const PROPERTYKEY key)
{
change_notify *change = (change_notify *)This;
struct ao *ao = change->ao;
if (!change->is_hotplug && pwstrDeviceId &&
!wcscmp(pwstrDeviceId, change->monitored))
{
MP_VERBOSE(ao, "OnPropertyValueChanged triggered on device %ls\n",
pwstrDeviceId);
if (IsEqualPropertyKey(PKEY_AudioEngine_DeviceFormat, key)) {
MP_VERBOSE(change->ao,
"Changed property: PKEY_AudioEngine_DeviceFormat "
"- requesting ao reload\n");
ao_request_reload(change->ao);
} else {
MP_VERBOSE(ao, "Changed property: %s\n", mp_PKEY_to_str(&key));
}
}
return S_OK;
}
static CONST_VTBL IMMNotificationClientVtbl sIMMNotificationClientVtbl = {
.QueryInterface = sIMMNotificationClient_QueryInterface,
.AddRef = sIMMNotificationClient_AddRef,
.Release = sIMMNotificationClient_Release,
.OnDeviceStateChanged = sIMMNotificationClient_OnDeviceStateChanged,
.OnDeviceAdded = sIMMNotificationClient_OnDeviceAdded,
.OnDeviceRemoved = sIMMNotificationClient_OnDeviceRemoved,
.OnDefaultDeviceChanged = sIMMNotificationClient_OnDefaultDeviceChanged,
.OnPropertyValueChanged = sIMMNotificationClient_OnPropertyValueChanged,
};
HRESULT wasapi_change_init(struct ao *ao, bool is_hotplug)
{
struct wasapi_state *state = ao->priv;
struct change_notify *change = &state->change;
HRESULT hr = CoCreateInstance(&CLSID_MMDeviceEnumerator, NULL, CLSCTX_ALL,
&IID_IMMDeviceEnumerator,
(void **)&change->pEnumerator);
EXIT_ON_ERROR(hr);
// so the callbacks can access the ao
change->ao = ao;
// whether or not this is the hotplug instance
change->is_hotplug = is_hotplug;
if (is_hotplug) {
MP_DBG(ao, "Monitoring for hotplug events\n");
} else {
// Get the device string to compare with the pwstrDeviceId
change->monitored = state->deviceID;
MP_VERBOSE(ao, "Monitoring changes in device %ls\n", change->monitored);
}
// COM voodoo to emulate c++ class
change->client.lpVtbl = &sIMMNotificationClientVtbl;
// register the change notification client
hr = IMMDeviceEnumerator_RegisterEndpointNotificationCallback(
change->pEnumerator, (IMMNotificationClient *)change);
EXIT_ON_ERROR(hr);
return hr;
exit_label:
MP_ERR(state, "Error setting up device change monitoring: %s\n",
mp_HRESULT_to_str(hr));
wasapi_change_uninit(ao);
return hr;
}
void wasapi_change_uninit(struct ao *ao)
{
struct wasapi_state *state = ao->priv;
struct change_notify *change = &state->change;
if (change->pEnumerator && change->client.lpVtbl) {
IMMDeviceEnumerator_UnregisterEndpointNotificationCallback(
change->pEnumerator, (IMMNotificationClient *)change);
}
SAFE_RELEASE(change->pEnumerator);
}
|
