HRESULT wasapi_change_init(struct ao *ao)
{
MP_DBG(ao, "Setting up monitoring on playback device\n");
struct wasapi_state *state = (struct wasapi_state *)ao->priv;
struct change_notify *change = &state->change;
/* COM voodoo to emulate c++ class */
change->client.lpVtbl = &sIMMDeviceEnumeratorVtbl_vtbl;
/* so the callbacks can access the ao */
change->ao = ao;
/* get the device string to compare with the pwstrDeviceId argument in callbacks */
HRESULT hr = IMMDevice_GetId(state->pDevice, &change->monitored);
EXIT_ON_ERROR(hr);
/* register the change notification client */
hr = IMMDeviceEnumerator_RegisterEndpointNotificationCallback(
state->pEnumerator, (IMMNotificationClient *)change);
EXIT_ON_ERROR(hr);
MP_VERBOSE(state, "Monitoring changes in device: %S\n", state->change.monitored);
return hr;
exit_label:
MP_ERR(state, "Error setting up device change monitoring: %s\n",
wasapi_explain_err(hr));
wasapi_change_uninit(ao);
return hr;
}
static void uninit(struct ao *ao)
{
MP_DBG(ao, "Uninit wasapi\n");
struct wasapi_state *state = ao->priv;
wasapi_release_proxies(state);
if (state->hWake)
set_thread_state(ao, WASAPI_THREAD_SHUTDOWN);
// wait up to 10 seconds
if (state->hAudioThread &&
WaitForSingleObject(state->hAudioThread, 10000) == WAIT_TIMEOUT)
{
MP_ERR(ao, "Audio loop thread refuses to abort\n");
return;
}
SAFE_RELEASE(state->hInitDone, CloseHandle(state->hInitDone));
SAFE_RELEASE(state->hWake, CloseHandle(state->hWake));
SAFE_RELEASE(state->hAudioThread,CloseHandle(state->hAudioThread));
wasapi_change_uninit(ao);
talloc_free(state->deviceID);
CoUninitialize();
MP_DBG(ao, "Uninit wasapi done\n");
}
HRESULT wasapi_change_init(struct ao *ao, bool is_hotplug)
{
struct wasapi_state *state = ao->priv;
struct change_notify *change = &state->change;
HRESULT hr;
/* COM voodoo to emulate c++ class */
change->client.lpVtbl = &sIMMDeviceEnumeratorVtbl_vtbl;
/* register the change notification client */
hr = IMMDeviceEnumerator_RegisterEndpointNotificationCallback(
state->pEnumerator, (IMMNotificationClient *)change);
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 */
hr = IMMDevice_GetId(state->pDevice, &change->monitored);
EXIT_ON_ERROR(hr);
MP_VERBOSE(ao, "Monitoring changes in device %S\n", change->monitored);
}
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;
}
static void hotplug_uninit(struct ao *ao)
{
MP_DBG(ao, "Hotplug uninit\n");
struct wasapi_state *state = ao->priv;
wasapi_change_uninit(ao);
SAFE_RELEASE(state->pEnumerator, IMMDeviceEnumerator_Release(state->pEnumerator));
CoUninitialize();
}
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);
// 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);
// 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 %S\n", change->monitored);
}
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;
}
static void hotplug_uninit(struct ao *ao)
{
MP_DBG(ao, "Hotplug uninit\n");
wasapi_change_uninit(ao);
CoUninitialize();
}
