Low latency shared mode: retry default period if custom fails

Falcosoft · Falcosoft · commit c0bd246cff63 · 2023-12-07T15:00:56.000+01:00
diff --git a/Source/Driver/ASIO2WASAPI.cpp b/Source/Driver/ASIO2WASAPI.cpp
@@ -381,6 +381,8 @@ IAudioClient* getAudioClient(IMMDevice* pDevice, WAVEFORMATEX* pWaveFormat, int&
         if (FAILED(hr)) return NULL;
         while (minPeriod < (defaultPeriod / 2)) minPeriod += fundamentalPeriod; //aim is about 5ms update period, 240 samples at 48kHz in ASIO terms 
         hr = pAudioClient3->InitializeSharedAudioStream(AUDCLNT_STREAMFLAGS_EVENTCALLBACK, minPeriod, format, NULL);
+        if (hr == AUDCLNT_E_ENGINE_PERIODICITY_LOCKED)
+            hr = pAudioClient3->InitializeSharedAudioStream(AUDCLNT_STREAMFLAGS_EVENTCALLBACK, currentPeriod, format, NULL);
         CoTaskMemFree(format);
         if (FAILED(hr)) return NULL;
     }

Original file line number	Diff line number	Diff line change
`@@ -381,6 +381,8 @@ IAudioClient* getAudioClient(IMMDevice* pDevice, WAVEFORMATEX* pWaveFormat, int&`
`381`	`381`	`if (FAILED(hr)) return NULL;`
`382`	`382`	`while (minPeriod < (defaultPeriod / 2)) minPeriod += fundamentalPeriod; //aim is about 5ms update period, 240 samples at 48kHz in ASIO terms`
`383`	`383`	`hr = pAudioClient3->InitializeSharedAudioStream(AUDCLNT_STREAMFLAGS_EVENTCALLBACK, minPeriod, format, NULL);`
	`384`	`+ if (hr == AUDCLNT_E_ENGINE_PERIODICITY_LOCKED)`
	`385`	`+ hr = pAudioClient3->InitializeSharedAudioStream(AUDCLNT_STREAMFLAGS_EVENTCALLBACK, currentPeriod, format, NULL);`
`384`	`386`	`CoTaskMemFree(format);`
`385`	`387`	`if (FAILED(hr)) return NULL;`
`386`	`388`	`}`