ao/wasapi: add ao hotplug

Create a second copy of the change_notify structure for the hotplug
ao. change_notify->is_hotplug distinguishes the hotplug version from
the regular one monitoring the currently playing ao. Also make the
change notification less verbose now that there might be two of them around.

1 files changed, 25 insertions, 1 deletions

diff --git a/audio/out/ao_wasapi_utils.c b/audio/out/ao_wasapi_utils.c
index 9e2ffe0dff..6ecc6c82a2 100755
--- a/audio/out/ao_wasapi_utils.c
+++ b/audio/out/ao_wasapi_utils.c
@@ -1211,7 +1211,7 @@ retry:
     }
     state->previous_volume = state->initial_volume;
 
-    wasapi_change_init(ao);
+    wasapi_change_init(ao, false);
 
     MP_DBG(ao, "Init wasapi thread done\n");
     return S_OK;
@@ -1221,6 +1221,30 @@ exit_label:
     return hr;
 }
 
+HRESULT wasapi_hotplug_init(struct ao *ao)
+{
+    struct wasapi_state *state = (struct wasapi_state *)ao->priv;
+    HRESULT hr = CoCreateInstance(&CLSID_MMDeviceEnumerator, NULL, CLSCTX_ALL,
+                                  &IID_IMMDeviceEnumerator, (void **)&state->pEnumerator);
+    EXIT_ON_ERROR(hr);
+
+    hr = wasapi_change_init(ao, true);
+    EXIT_ON_ERROR(hr);
+
+    return S_OK;
+exit_label:
+    MP_ERR(state, "Error setting up audio hotplug: %s (0x%"PRIx32")\n",
+           wasapi_explain_err(hr), (uint32_t) hr);
+    return hr;
+}
+
+void wasapi_hotplug_uninit(struct ao *ao)
+{
+    struct wasapi_state *state = (struct wasapi_state *)ao->priv;
+    wasapi_change_uninit(ao);
+    SAFE_RELEASE(state->pEnumerator, IMMDeviceEnumerator_Release(state->pEnumerator));
+}
+
 void wasapi_thread_uninit(struct ao *ao)
 {
     struct wasapi_state *state = (struct wasapi_state *)ao->priv;