SPU2: Add function to pause output stream

pcsx2/SPU2/SndOut.cpp

@@ -46,11 +46,12 @@ StereoOut32 StereoOut16::UpSample() const
 }
 
 
-class NullOutModule : public SndOutModule
+class NullOutModule final : public SndOutModule
 {
 public:
 	bool Init() override { return true; }
 	void Close() override {}
+	void SetPaused(bool paused) override {}
 	int GetEmptySampleCount() override { return 0; }
 
 	const wchar_t* GetIdent() const override
@@ -421,6 +422,11 @@ void SndBuffer::ClearContents()
 	SndBuffer::ssFreeze = 256; //Delays sound output for about 1 second.
 }
 
+void SndBuffer::SetPaused(bool paused)
+{
+	mods[OutputModule]->SetPaused(paused);
+}
+
 void SndBuffer::Write(const StereoOut32& Sample)
 {
 	// Log final output to wavefile.

pcsx2/SPU2/SndOut.h

@@ -618,6 +618,7 @@ public:
 	static void Cleanup();
 	static void Write(const StereoOut32& Sample);
 	static void ClearContents();
+	static void SetPaused(bool paused);
 
 	// Note: When using with 32 bit output buffers, the user of this function is responsible
 	// for shifting the values to where they need to be manually.  The fixed point depth of
@@ -644,6 +645,9 @@ public:
 	virtual bool Init() = 0;
 	virtual void Close() = 0;
 
+	// Temporarily pauses the stream, preventing it from requesting data.
+	virtual void SetPaused(bool paused) = 0;
+
 	// Returns the number of empty samples in the output buffer.
 	// (which is effectively the amount of data played since the last update)
 	virtual int GetEmptySampleCount() = 0;

pcsx2/SPU2/SndOut_Cubeb.cpp

@@ -296,6 +296,7 @@ public:
 			return false;
 		}
 
+		m_paused = false;
 		return true;
 	}
 
@@ -314,6 +315,21 @@ public:
 		return nframes;
 	}
 
+	void SetPaused(bool paused) override
+	{
+		if (paused == m_paused || !stream)
+			return;
+
+		const int rv = paused ? cubeb_stream_stop(stream) : cubeb_stream_start(stream);
+		if (rv != CUBEB_OK)
+		{
+			Console.Error("(Cubeb) Could not %s stream: %d", paused ? "pause" : "resume", rv);
+			return;
+		}
+
+		m_paused = paused;
+	}
+
 	int GetEmptySampleCount() override
 	{
 		u64 pos;

pcsx2/SPU2/Windows/SndOut_XAudio2.cpp

@@ -125,10 +125,20 @@ private:
 				pSourceVoice->SubmitSourceBuffer(&buf);
 			}
 
-			pSourceVoice->Start(0, 0);
+			Start();
 			return true;
 		}
 
+		void Stop()
+		{
+			pSourceVoice->Stop();
+		}
+
+		void Start()
+		{
+			pSourceVoice->Start(0, 0);
+		}
+
 	protected:
 		STDMETHOD_(void, OnVoiceProcessingPassStart)
 		(UINT32) override {}
@@ -187,6 +197,7 @@ private:
 	wil::com_ptr_nothrow<IXAudio2> pXAudio2;
 	IXAudio2MasteringVoice* pMasteringVoice = nullptr;
 	std::unique_ptr<BaseStreamingVoice> m_voiceContext;
+	bool m_paused = false;
 
 public:
 	bool Init() override
@@ -304,6 +315,7 @@ public:
 			return false;
 		}
 
+		m_paused = false;
 		return true;
 	}
 
@@ -329,6 +341,19 @@ public:
 		return m_voiceContext->GetEmptySampleCount();
 	}
 
+	void SetPaused(bool paused) override
+	{
+		if (m_voiceContext == nullptr || m_paused == paused)
+			return;
+
+		if (paused)
+			m_voiceContext->Stop();
+		else
+			m_voiceContext->Start();
+
+		m_paused = paused;
+	}
+
 	const wchar_t* GetIdent() const override
 	{
 		return L"xaudio2";

pcsx2/SPU2/spu2.cpp

@@ -351,6 +351,11 @@ void SPU2shutdown()
 #endif
 }
 
+void SPU2SetOutputPaused(bool paused)
+{
+	SndBuffer::SetPaused(paused);
+}
+
 #ifdef DEBUG_KEYS
 static u32 lastTicks;
 static bool lState[6];

pcsx2/SPU2/spu2.h

@@ -31,6 +31,7 @@ s32 SPU2reset(PS2Modes isRunningPSXMode);
 s32 SPU2open();
 void SPU2close();
 void SPU2shutdown();
+void SPU2SetOutputPaused(bool paused);
 void SPU2write(u32 mem, u16 value);
 u16 SPU2read(u32 mem);