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/*
* 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 General Public License as published by
* the Free Software Foundation; either version 2 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with mpv. If not, see <http://www.gnu.org/licenses/>.
*/
#define COBJMACROS 1
#define _WIN32_WINNT 0x600
#include <initguid.h>
#include <audioclient.h>
#include <endpointvolume.h>
#include <mmdeviceapi.h>
#include <wchar.h>
#include <stdlib.h>
#include "ao_wasapi.h"
#include "ao_wasapi_utils.h"
static int GUID_compare(const GUID *l, const GUID *r)
{
unsigned int i;
if (l->Data1 != r->Data1) return 1;
if (l->Data2 != r->Data2) return 1;
if (l->Data3 != r->Data3) return 1;
for (i = 0; i < 8; i++) {
if (l->Data4[i] != r->Data4[i]) return 1;
}
return 0;
}
static HRESULT STDMETHODCALLTYPE sIMMNotificationClient_QueryInterface(
IMMNotificationClient* This, REFIID riid, void **ppvObject)
{
/* Compatible with IMMNotificationClient and IUnknown */
if (!GUID_compare(&IID_IMMNotificationClient, riid) ||
!GUID_compare(&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;
if (!wcscmp(change->monitored, pwstrDeviceId)){
switch (dwNewState) {
case DEVICE_STATE_DISABLED:
case DEVICE_STATE_NOTPRESENT:
case DEVICE_STATE_UNPLUGGED:
case DEVICE_STATE_ACTIVE:
default:
return S_OK;
}
}
return S_OK;
}
static HRESULT STDMETHODCALLTYPE sIMMNotificationClient_OnDeviceAdded(
IMMNotificationClient *This,
LPCWSTR pwstrDeviceId)
{
change_notify *change = (change_notify *)This;
return S_OK;
}
/* maybe MPV can go over to the prefered device once it is plugged in? */
static HRESULT STDMETHODCALLTYPE sIMMNotificationClient_OnDeviceRemoved(
IMMNotificationClient *This,
LPCWSTR pwstrDeviceId)
{
change_notify *change = (change_notify *)This;
if (!wcscmp(change->monitored, pwstrDeviceId)) {
}
return S_OK;
}
static HRESULT STDMETHODCALLTYPE sIMMNotificationClient_OnDefaultDeviceChanged(
IMMNotificationClient *This,
EDataFlow flow,
ERole role,
LPCWSTR pwstrDeviceId)
{
change_notify *change = (change_notify *)This;
if (!wcscmp(change->monitored, pwstrDeviceId)) {
}
return S_OK;
}
static HRESULT STDMETHODCALLTYPE sIMMNotificationClient_OnPropertyValueChanged(
IMMNotificationClient *This,
LPCWSTR pwstrDeviceId,
const PROPERTYKEY key)
{
change_notify *change = (change_notify *)This;
if (!wcscmp(change->monitored, pwstrDeviceId)) {
}
return S_OK;
}
static CONST_VTBL IMMNotificationClientVtbl sIMMDeviceEnumeratorVtbl_vtbl = {
.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 change_notify *change, IMMDevice *monitor)
{
HRESULT ret;
if ( ((ret = IMMDevice_GetId(monitor, &change->monitored)) != S_OK) ) {
wasapi_change_free(change);
return ret;
}
ret = S_OK;
change->client.lpVtbl = &sIMMDeviceEnumeratorVtbl_vtbl;
return ret;
}
void wasapi_change_free(struct change_notify *change)
{
if (change->monitored) CoTaskMemFree(change->monitored);
}
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