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WASAPI: Fix a crash when changing devices.

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This commit is contained in:
David Reid
2024-07-14 07:16:43 +10:00
parent fc45d8ca06
commit 8036ac3781
1 changed files with 17 additions and 2 deletions
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miniaudio.h
+17 -2
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@@ -21541,8 +21541,23 @@ static ma_result ma_context_get_MMDevice__wasapi(ma_context* pContext, ma_device
MA_ASSERT(pContext != NULL);
MA_ASSERT(ppMMDevice != NULL);
hr = ma_CoCreateInstance(pContext, &MA_CLSID_MMDeviceEnumerator, NULL, CLSCTX_ALL, &MA_IID_IMMDeviceEnumerator, (void**)&pDeviceEnumerator);
if (FAILED(hr)) {
/*
This weird COM init/uninit here is a hack to work around a crash when changing devices. What is happening is
WASAPI fires a callback from another thread when the device is changed. It's from that thread where this
function is getting called. What I'm suspecting is that the other thread is not initializing COM which in turn
results in CoCreateInstance() failing.
The community has reported that this seems to fix the crash. There are future plans to move all WASAPI operation
over to a single thread to make everything safer, but in the meantime while we wait for that to come online I'm
happy enough to use this hack instead.
*/
ma_CoInitializeEx(pContext, NULL, MA_COINIT_VALUE);
{
hr = ma_CoCreateInstance(pContext, &MA_CLSID_MMDeviceEnumerator, NULL, CLSCTX_ALL, &MA_IID_IMMDeviceEnumerator, (void**)&pDeviceEnumerator);
}
ma_CoUninitialize(pContext);
if (FAILED(hr)) { /* <-- This is checking the call above to ma_CoCreateInstance(). */
ma_log_postf(ma_context_get_log(pContext), MA_LOG_LEVEL_ERROR, "[WASAPI] Failed to create IMMDeviceEnumerator.\n");
return ma_result_from_HRESULT(hr);
}