[engine] Make XAudio2 default audio engine on Windows

DirectSound8 is obsolete and preserved for backward compatibility.

engine/audio/private/snd_dev_xaudio.h

@@ -55,7 +55,6 @@ class CXboxVoice
 };
 
 CXboxVoice *Audio_GetXVoice( void );
-IXAudio2 *Audio_GetXAudio2( void );
 
 #endif
 

engine/audio/private/snd_dma.cpp

@@ -447,7 +447,7 @@ typedef struct
 
 static soundfade_t soundfade;  // Client sound fading singleton object
 
-// 0)headphones 2)stereo speakers 4)quad 5)5point1 
+// 0)headphones 2)stereo speakers 4)quad 5)5point1 7)7point1
 // autodetected from windows settings
 ConVar snd_surround( "snd_surround_speakers", "-1", FCVAR_INTERNAL_USE );
 ConVar snd_legacy_surround( "snd_legacy_surround", "0", FCVAR_ARCHIVE );

engine/audio/private/snd_wave_data.cpp

@@ -42,10 +42,10 @@ extern double realtime;
 #define TF_XBOX_WAV_MEMORY_CACHE ( 24 * 1024 * 1024 ) // Team Fortress uses a larger cache
 
 // Dev builds will be missing soundcaches and hitch sometimes, we only care if its being properly launched from steam where sound caches should be complete.
-ConVar snd_async_spew_blocking( "snd_async_spew_blocking", "1", 0, "Spew message to console any time async sound loading blocks on file i/o. ( 0=Off, 1=With -steam only, 2=Always" );
+ConVar snd_async_spew_blocking( "snd_async_spew_blocking", "1", 0, "Spew message to console any time async sound loading blocks on file I/O. (0=Off, 1=With -steam only, 2=Always)" );
 ConVar snd_async_spew( "snd_async_spew", "0", 0, "Spew all async sound reads, including success" );
 ConVar snd_async_fullyasync( "snd_async_fullyasync", "0", 0, "All playback is fully async (sound doesn't play until data arrives)." );
-ConVar snd_async_stream_spew( "snd_async_stream_spew", "0", 0, "Spew streaming info ( 0=Off, 1=streams, 2=buffers" );
+ConVar snd_async_stream_spew( "snd_async_stream_spew", "0", 0, "Spew streaming info (0=Off, 1=streams, 2=buffers)" );
 
 static bool SndAsyncSpewBlocking()
 {

engine/audio/private/snd_win.cpp

@@ -1,8 +1,6 @@
 //========= Copyright Valve Corporation, All rights reserved. ============//
 //
-// Purpose: 
-//
-//=====================================================================================//
+// Purpose: Sound device dispatch and initialization.
 
 #include "audio_pch.h"
 
@@ -17,135 +15,164 @@ ConVar snd_audioqueue( "snd_audioqueue", "1" );
 
 #endif
 
+#include "snd_dev_xaudio.h"
+
 // memdbgon must be the last include file in a .cpp file!!!
 #include "tier0/memdbgon.h"
 
+// dimhotepus: Allow to override sound device.
+ConVar snd_device_override( "snd_device_override", "0", FCVAR_ARCHIVE,
+	"Allow to override used sound device.\nPossible values:\n"
+	"0\tAutodetection\n"
+#ifdef PLATFORM_WINDOWS
+	"1\tXAudio 2 [default]\n"
+	"2\tDirect Sound 8\n",
+#elif defined(OSX)
+	"1\tMac Audio Queue [default]\n"
+	"2\tOpen AL\n",
+#elif defined(USE_SDL)
+	"1\tSDL [default]",
+#endif
+	true,
+	0,
+	true,
+#if defined(PLATFORM_WINDOWS)
+	2
+#elif defined(OSX)
+	2
+#elif defined(USE_SDL)
+	1
+#endif
+);
+
+/**
+ * @brief Audio device kind.
+ */
+enum class AudioDeviceKind {
+	/**
+	 * @brief Autodetect.
+	 */
+	kAutodetect = 0
+#ifdef PLATFORM_WINDOWS
+	, kXAudio2 = 1
+	, kDirectSound8 = 2
+#elif defined(OSX)
+	, kMacAudioQueue = 1
+	, kOpenAL = 2
+#elif defined(USE_SDL)
+	, kSDL = 2
+#endif
+};
+
 bool snd_firsttime = true;
 
 /* 
  * Global variables. Must be visible to window-procedure function 
  *  so it can unlock and free the data block after it has been played. 
  */ 
-IAudioDevice *g_AudioDevice = NULL;
-
-/*
-==================
-S_BlockSound
-==================
-*/
-void S_BlockSound( void )
+IAudioDevice *g_AudioDevice = nullptr;
+
+void S_BlockSound()
 {
 	if ( !g_AudioDevice )
 		return;
 
 	g_AudioDevice->Pause();
 }
 
-/*
-==================
-S_UnblockSound
-==================
-*/
-void S_UnblockSound( void )
+void S_UnblockSound()
 {
 	if ( !g_AudioDevice )
 		return;
 
 	g_AudioDevice->UnPause();
 }
 
-/*
-==================
-AutoDetectInit
-
-Try to find a sound device to mix for.
-Returns a CAudioNULLDevice if nothing is found.
-==================
-*/
+/**
+ * @brief Autodetect and find sound device to mix on.
+ * @param Unused.
+ * @return Audio device to mix on. Null device when no sound.
+ */
 IAudioDevice *IAudioDevice::AutoDetectInit()
 {
-	IAudioDevice *pDevice = NULL;
+	IAudioDevice *pDevice = nullptr;
 
-	if ( IsPC() )
-	{
 #if defined( WIN32 ) && !defined( USE_SDL )
-		if ( snd_firsttime )
-		{
-			pDevice = Audio_CreateDirectSoundDevice();
+	if ( snd_firsttime )
+	{
+		const auto device_override =
+			static_cast<AudioDeviceKind>(snd_device_override.GetInt());
+
+		switch (device_override) {
+			default:
+				Warning( "Unknown 'snd_device_override' con var value %d. Using autodetection.\n",
+					to_underlying(device_override) );
+				[[fallthrough]];
+
+			case AudioDeviceKind::kAutodetect:
+			case AudioDeviceKind::kXAudio2:
+				{
+					pDevice = Audio_CreateXAudioDevice();
+					if ( pDevice )
+					{
+						// XAudio2 requires threaded mixing.
+						S_EnableThreadedMixing( true );
+					}
+				}
+				break;
+
+			case AudioDeviceKind::kDirectSound8:
+				pDevice = Audio_CreateDirectSoundDevice();
+				break;
 		}
+	}
 #elif defined(OSX)
-		if ( !CommandLine()->CheckParm( "-snd_openal" ) )
-		{
-			DevMsg( "Using AudioQueue Interface\n" );
+	const auto device_override =
+		static_cast<AudioDeviceKind>(snd_device_override.GetInt());
+
+	switch (device_override) {
+		default:
+			Warning( "Unknown 'snd_device_override' con var value %d. Using autodetection.\n",
+				to_underlying(device_override) );
+			[[fallthrough]];
+
+		case AudioDeviceKind::kAutodetect:
+		case AudioDeviceKind::kMacAudioQueue:
 			pDevice = Audio_CreateMacAudioQueueDevice();
-		}
-		if ( !pDevice )
-		{
-			DevMsg( "Using OpenAL Interface\n" );
-			pDevice = Audio_CreateOpenALDevice(); // fall back to openAL if the audio queue fails
-		}
-#elif defined( USE_SDL )
-		DevMsg( "Trying SDL Audio Interface\n" );
-		pDevice = Audio_CreateSDLAudioDevice();
-
-#ifdef NEVER
-		// Jul 2012. mikesart. E-mail exchange with Ryan Gordon after figuring out that
-		// Audio_CreatePulseAudioDevice() wasn't working on Ubuntu 12.04 (lots of stuttering).
-		//
-		// > I installed libpulse-dev, rebuilt SDL, and now SDL is using pulse
-		// > audio and everything is working great. However I'm wondering if we
-		// > need to fall back to PulseAudio in our codebase if SDL is doing that
-		// > for us. I mean, is it worth me going through and debugging our Pulse
-		// > Audio path or should I just remove it?
-		// 
-		// Remove it...it never worked well, and only remained in case there were
-		// concerns about relying on SDL. The SDL codepath is way easier to read,
-		// simpler to maintain, and handles all sorts of strange audio backends,
-		// including Pulse.
-		if ( !pDevice )
-		{
-			DevMsg( "Trying PulseAudio Interface\n" );
-			pDevice = Audio_CreatePulseAudioDevice(); // fall back to PulseAudio if SDL fails
-		}
-#endif // NEVER
+			break;
 
-#else
-#error "Please define your platform"
-#endif
+		case AudioDeviceKind::kOpenAL:
+			pDevice = Audio_CreateOpenALDevice();
+			break;
 	}
-#if defined( _X360 )
-	else
+
+	if ( !pDevice )
 	{
-		pDevice = Audio_CreateXAudioDevice( true );
-		if ( pDevice )
-		{
-			// xaudio requires threaded mixing
-			S_EnableThreadedMixing( true );
-		}
+		// fall back to openAL if the audio queue fails
+		DevMsg( "Using OpenAL Interface\n" );
+		pDevice = Audio_CreateOpenALDevice();
 	}
+#elif defined( USE_SDL )
+	DevMsg( "Trying SDL Audio Interface\n" );
+	pDevice = Audio_CreateSDLAudioDevice();
+#else
+#error "Please define your platform"
 #endif
 
 	snd_firsttime = false;
 
 	if ( !pDevice )
 	{
 		if ( snd_firsttime )
-			DevMsg( "No sound device initialized\n" );
+			DevMsg( "No sound device initialized.\n" );
 
 		return Audio_GetNullDevice();
 	}
 
 	return pDevice;
 }
 
-/*
-==============
-SNDDMA_Shutdown
-
-Reset the sound device for exiting
-===============
-*/
-void SNDDMA_Shutdown( void )
+void SNDDMA_Shutdown()
 {
 	if ( g_AudioDevice != Audio_GetNullDevice() )
 	{
@@ -159,4 +186,3 @@ void SNDDMA_Shutdown( void )
 		g_AudioDevice = Audio_GetNullDevice();
 	}
 }
-

engine/engine.vpc

@@ -529,8 +529,7 @@ $Project "engine"
 			}
 		}
 
-		// X360 only audio files
-		$File	"audio\private\snd_dev_xaudio.cpp"		[$X360] \
+		$File	"audio\private\snd_dev_xaudio.cpp"	 \
 				"audio\private\snd_wave_mixer_xma.cpp"	[$X360]
 		{
 			$Configuration

engine/sys_mainwind.cpp

@@ -644,6 +644,22 @@ LRESULT CGame::WindowProc( HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
 
 	case WM_ACTIVATEAPP:
 		{
+			// dimhotepus: Unify way to handle sound mute on focus lost.
+			ConVarRef snd_mute_losefocus("snd_mute_losefocus");
+			if (snd_mute_losefocus.GetBool())
+			{
+				if ( wParam == 1 )
+				{
+					S_UnblockSound();
+				}
+				else
+				{
+					S_BlockSound();
+					// dimhotepus: Need to be thread-safe.
+					// S_ClearBuffer();
+				}
+			}
+
 			if ( CanPostActivateEvents() )
 			{
 				bool bActivated = ( wParam == 1 );