Prevent 3D sample allocation during Miles audio provider initialization

Core/GameEngineDevice/Include/MilesAudioDevice/MilesAudioManager.h

@@ -282,6 +282,7 @@ class MilesAudioManager : public AudioManager
 		UnsignedInt m_selectedProvider;
 		UnsignedInt m_lastProvider;
 		UnsignedInt m_selectedSpeakerType;
+		Bool m_providerInitializing;
 
 		AsciiString m_pref3DProvider;
 		AsciiString m_prefSpeaker;

Core/GameEngineDevice/Source/MilesAudioDevice/MilesAudioManager.cpp

@@ -92,7 +92,8 @@
 	m_delayFilter(NULL),
 	m_binkHandle(NULL),
 	m_pref3DProvider(AsciiString::TheEmptyString),
-	m_prefSpeaker(AsciiString::TheEmptyString)
+	m_prefSpeaker(AsciiString::TheEmptyString),
+	m_providerInitializing(FALSE)
 {
 	m_audioCache = NEW AudioFileCache;
 }
@@ -1225,6 +1226,12 @@
 //-------------------------------------------------------------------------------------------------
 H3DSAMPLE MilesAudioManager::getFirst3DSample( AudioEventRTS *event )
 {
+	// Don't allocate 3D samples while provider is still initializing
+	// This prevents race conditions where samples are used before DirectSound buffers are fully set up
+	if (m_providerInitializing) {
+		return NULL;
+	}
+
 	if (m_available3DSamples.begin() != m_available3DSamples.end()) {
 		H3DSAMPLE retSample = *m_available3DSamples.begin();
 		m_available3DSamples.erase(m_available3DSamples.begin());
@@ -1722,6 +1729,10 @@
 	{
 		providerNdx = getProviderIndex( "Miles Fast 2D Positional Audio" );
 	}
+
+	// Set initialization flag to prevent samples from being used before provider is ready
+	m_providerInitializing = TRUE;
+
 	success = AIL_open_3D_provider( m_provider3D[providerNdx].id ) == 0;
 
 	//if (providerNdx < m_providerCount)
@@ -1743,14 +1754,31 @@
 	{
 		m_selectedProvider = providerNdx;
 
+		// Create listener first to ensure provider has proper context
+		createListener();
+
+		// Force the provider to complete internal initialization by updating listener position
+		// This ensures DirectSound buffers are fully set up before sample allocation
+		if (m_listener) {
+			AIL_update_3D_position(m_listener);
+		}
+
+		// Now it's safe to initialize sample pools
 		initSamplePools();
 
-		createListener();
 		setSpeakerType(m_selectedSpeakerType);
 		if (TheVideoPlayer)
 		{
 			TheVideoPlayer->notifyVideoPlayerOfNewProvider(TRUE);
 		}
+
+		// Clear initialization flag - provider is now fully ready
+		m_providerInitializing = FALSE;
+	}
+	else
+	{
+		// Failed to open provider, clear initialization flag
+		m_providerInitializing = FALSE;
 	}
 }