SPU: On config change don't reinit sample rate.

Also fix up some other samplerate related things and turn the soundtouch pointer in to a unique pointer.

pcsx2/SPU2/Timestretcher.cpp

@@ -23,7 +23,7 @@
 //Uncomment the next line to use the old time stretcher
 //#define SPU2X_USE_OLD_STRETCHER
 
-static soundtouch::SoundTouch* pSoundTouch = nullptr;
+static std::unique_ptr<soundtouch::SoundTouch> pSoundTouch = nullptr;
 
 // data prediction amount, used to "commit" data that hasn't
 // finished timestretch processing.
@@ -518,7 +518,7 @@ void SndBuffer::timeStretchWrite()
 
 void SndBuffer::soundtouchInit()
 {
-	pSoundTouch = new soundtouch::SoundTouch();
+	pSoundTouch = std::make_unique<soundtouch::SoundTouch>();
 	pSoundTouch->setSampleRate(SampleRate);
 	pSoundTouch->setChannels(2);
 
@@ -558,5 +558,5 @@ void SndBuffer::soundtouchClearContents()
 
 void SndBuffer::soundtouchCleanup()
 {
-	safe_delete(pSoundTouch);
+	pSoundTouch.reset();
 }

pcsx2/SPU2/Wavedump_wav.cpp

@@ -26,7 +26,7 @@
 
 static WavOutFile* _new_WavOutFile(const char* destfile)
 {
-	return new WavOutFile(destfile, 48000, 16, 2);
+	return new WavOutFile(destfile, SampleRate, 16, 2);
 }
 
 namespace WaveDump
@@ -121,12 +121,12 @@ bool RecordStart(const std::string* filename)
 		safe_delete(m_wavrecord);
 		if (filename)
 #ifdef _WIN32
-			m_wavrecord = new WavOutFile(_wfopen(StringUtil::UTF8StringToWideString(*filename).c_str(), L"wb"), 48000, 16, 2);
+			m_wavrecord = new WavOutFile(_wfopen(StringUtil::UTF8StringToWideString(*filename).c_str(), L"wb"), SampleRate, 16, 2);
 #else
-			m_wavrecord = new WavOutFile(filename->c_str(), 48000, 16, 2);
+			m_wavrecord = new WavOutFile(filename->c_str(), SampleRate, 16, 2);
 #endif
 		else
-			m_wavrecord = new WavOutFile("audio_recording.wav", 48000, 16, 2);
+			m_wavrecord = new WavOutFile("audio_recording.wav", SampleRate, 16, 2);
 		WavRecordEnabled = true;
 		return true;
 	}

pcsx2/SPU2/spu2.cpp

@@ -192,7 +192,7 @@ void SPU2SetDeviceSampleRateMultiplier(double multiplier)
 	SPU2UpdateSampleRate();
 }
 
-s32 SPU2init()
+s32 SPU2init(bool KeepMode)
 {
 	assert(regtable[0x400] == nullptr);
 
@@ -244,7 +244,7 @@ s32 SPU2init()
 		}
 	}
 
-	SPU2InternalReset(PS2Modes::PS2);
+	SPU2InternalReset((ConsoleSampleRate == 44100 && KeepMode) ? PS2Modes::PSX : PS2Modes::PS2);
 
 	DMALogOpen();
 	InitADSR();

pcsx2/SPU2/spu2.h

@@ -27,7 +27,7 @@ enum class PS2Modes
 	PSX,
 };
 
-s32 SPU2init();
+s32 SPU2init(bool KeepMode);
 s32 SPU2reset(PS2Modes isRunningPSXMode);
 s32 SPU2open();
 void SPU2close();

pcsx2/VMManager.cpp

@@ -908,7 +908,7 @@ bool VMManager::Initialize(VMBootParameters boot_params)
 	};
 
 	Console.WriteLn("Opening SPU2...");
-	if (SPU2init() != 0 || SPU2open() != 0)
+	if (SPU2init(false) != 0 || SPU2open() != 0)
 	{
 		Host::ReportErrorAsync("Startup Error", "Failed to initialize SPU2.");
 		SPU2shutdown();
@@ -1636,7 +1636,7 @@ void VMManager::CheckForSPU2ConfigChanges(const Pcsx2Config& old_config)
 
 	SPU2close();
 	SPU2shutdown();
-	if (SPU2init() != 0 || SPU2open() != 0)
+	if (SPU2init(true) != 0 || SPU2open() != 0)
 	{
 		Console.Error("(CheckForSPU2ConfigChanges) Failed to reopen SPU2, we'll probably crash :(");
 		return;

pcsx2/gui/SysCoreThread.cpp

@@ -111,7 +111,7 @@ void SysCoreThread::OnSuspendInThread()
 
 void SysCoreThread::Start()
 {
-	SPU2init();
+	SPU2init(false);
 	PADinit();
 	DEV9init();
 	USBinit();