From 9cd2e9ec8fc0127393dfce9c0359d500c8c238be Mon Sep 17 00:00:00 2001
From: Edward Rudd <urkle@outoforder.cc>
Date: Tue, 09 Apr 2019 02:22:50 +0000
Subject: [PATCH] updae source to 2.0.9 source

---
 source/src/audio/wasapi/SDL_wasapi_winrt.cpp |   65 ++++++++++++++++++--------------
 1 files changed, 37 insertions(+), 28 deletions(-)

diff --git a/source/src/audio/wasapi/SDL_wasapi_winrt.cpp b/source/src/audio/wasapi/SDL_wasapi_winrt.cpp
index 309ec6a..2ca09de 100644
--- a/source/src/audio/wasapi/SDL_wasapi_winrt.cpp
+++ b/source/src/audio/wasapi/SDL_wasapi_winrt.cpp
@@ -185,20 +185,9 @@
 HRESULT
 SDL_WasapiActivationHandler::ActivateCompleted(IActivateAudioInterfaceAsyncOperation *async)
 {
-    HRESULT result = S_OK;
-    IUnknown *iunknown = nullptr;
-    const HRESULT ret = async->GetActivateResult(&result, &iunknown);
-
-    if (SUCCEEDED(ret) && SUCCEEDED(result)) {
-        iunknown->QueryInterface(IID_PPV_ARGS(&device->hidden->client));
-        if (device->hidden->client) {
-            // Just set a flag, since we're probably in a different thread. We'll pick it up and init everything on our own thread to prevent races.
-            SDL_AtomicSet(&device->hidden->just_activated, 1);
-        }
-    }
-
+    // Just set a flag, since we're probably in a different thread. We'll pick it up and init everything on our own thread to prevent races.
+    SDL_AtomicSet(&device->hidden->just_activated, 1);
     WASAPI_UnrefDevice(device);
-
     return S_OK;
 }
 
@@ -236,27 +225,47 @@
     IActivateAudioInterfaceAsyncOperation *async = nullptr;
     const HRESULT ret = ActivateAudioInterfaceAsync(devid, __uuidof(IAudioClient), nullptr, handler.Get(), &async);
 
-    if (async != nullptr) {
-        async->Release();
-    }
-
-    if (FAILED(ret)) {
+    if (FAILED(ret) || async == nullptr) {
+        if (async != nullptr) {
+            async->Release();
+        }
         handler.Get()->Release();
         WASAPI_UnrefDevice(_this);
         return WIN_SetErrorFromHRESULT("WASAPI can't activate requested audio endpoint", ret);
     }
 
-    return 0;
-}
-
-void
-WASAPI_BeginLoopIteration(_THIS)
-{
-    if (SDL_AtomicCAS(&_this->hidden->just_activated, 1, 0)) {
-        if (WASAPI_PrepDevice(_this, SDL_TRUE) == -1) {
-            SDL_OpenedAudioDeviceDisconnected(_this);
-        } 
+    /* Spin until the async operation is complete.
+     * If we don't PrepDevice before leaving this function, the bug list gets LONG:
+     * - device.spec is not filled with the correct information
+     * - The 'obtained' spec will be wrong for ALLOW_CHANGE properties
+     * - SDL_AudioStreams will/will not be allocated at the right time
+     * - SDL_assert(device->callbackspec.size == device->spec.size) will fail
+     * - When the assert is ignored, skipping or a buffer overflow will occur
+     */
+    while (!SDL_AtomicCAS(&_this->hidden->just_activated, 1, 0)) {
+        SDL_Delay(1);
     }
+
+    HRESULT activateRes = S_OK;
+    IUnknown *iunknown = nullptr;
+    const HRESULT getActivateRes = async->GetActivateResult(&activateRes, &iunknown);
+    async->Release();
+    if (FAILED(getActivateRes)) {
+        return WIN_SetErrorFromHRESULT("Failed to get WASAPI activate result", getActivateRes);
+    } else if (FAILED(activateRes)) {
+        return WIN_SetErrorFromHRESULT("Failed to activate WASAPI device", activateRes);
+    }
+
+    iunknown->QueryInterface(IID_PPV_ARGS(&_this->hidden->client));
+    if (!_this->hidden->client) {
+        return SDL_SetError("Failed to query WASAPI client interface");
+    }
+
+    if (WASAPI_PrepDevice(_this, isrecovery) == -1) {
+        return -1;
+    }
+
+    return 0;
 }
 
 void

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