Prototype for running 16 TGs on a RPi 4

src/config.h

@@ -33,11 +33,17 @@ class CConfig		// Configuration for MiniDexed
 public:
 #ifndef ARM_ALLOW_MULTI_CORE
 	static const unsigned ToneGenerators = 1;
+#else
+#if RASPPI == 4
+	static const unsigned TGsCore1 = 4;		// process 4 TGs on core 1
+	static const unsigned TGsCore23 = 6;		// process 6 TGs on core 2 and 3 each
+	static const unsigned ToneGenerators = TGsCore1 + 2*TGsCore23;
 #else
 	static const unsigned TGsCore1 = 2;		// process 2 TGs on core 1
 	static const unsigned TGsCore23 = 3;		// process 3 TGs on core 2 and 3 each
 	static const unsigned ToneGenerators = TGsCore1 + 2*TGsCore23;
 #endif
+#endif
 
 #if RASPPI == 1
 	static const unsigned MaxNotes = 8;		// polyphony

src/minidexed.cpp

@@ -45,7 +45,7 @@ CMiniDexed::CMiniDexed (CConfig *pConfig, CInterruptSystem *pInterrupt,
 	m_pSoundDevice (0),
 	m_bChannelsSwapped (pConfig->GetChannelsSwapped ()),
 #ifdef ARM_ALLOW_MULTI_CORE
-	m_nActiveTGsLog2 (0),
+	//m_nActiveTGsLog2 (0),
 #endif
 	m_GetChunkTimer ("GetChunk",
 			 1000000U * pConfig->GetChunkSize ()/2 / pConfig->GetSampleRate ()),
@@ -567,9 +567,9 @@ void CMiniDexed::SetMIDIChannel (uint8_t uchChannel, unsigned nTG)
 		}
 	}
 
-	assert (nActiveTGs <= 8);
+	//assert (nActiveTGs <= 16);
-	static const unsigned Log2[] = {0, 0, 1, 2, 2, 3, 3, 3, 3};
+	//static const unsigned Log2[] = {0, 0, 1, 2, 2, 3, 3, 3, 3};
-	m_nActiveTGsLog2 = Log2[nActiveTGs];
+	//m_nActiveTGsLog2 = Log2[nActiveTGs];
 #endif
 
 	m_UI.ParameterChanged ();
@@ -1018,7 +1018,7 @@ void CMiniDexed::ProcessSound (void)
 		// Audio signal path after tone generators starts here
 		//
 
-		assert (CConfig::ToneGenerators == 8);
+		assert (CConfig::ToneGenerators == 16);
 
 		uint8_t indexL=0, indexR=1;
 		

src/minidexed.h

@@ -282,7 +282,7 @@ private:
 	unsigned m_nQueueSizeFrames;
 
 #ifdef ARM_ALLOW_MULTI_CORE
-	unsigned m_nActiveTGsLog2;
+	//unsigned m_nActiveTGsLog2;
 	volatile TCoreStatus m_CoreStatus[CORES];
 	volatile unsigned m_nFramesToProcess;
 	float32_t m_OutputLevel[CConfig::ToneGenerators][CConfig::MaxChunkSize];

src/uimenu.cpp

@@ -50,6 +50,14 @@ const CUIMenu::TMenuItem CUIMenu::s_MainMenu[] =
 	{"TG6",		MenuHandler,	s_TGMenu, 5},
 	{"TG7",		MenuHandler,	s_TGMenu, 6},
 	{"TG8",		MenuHandler,	s_TGMenu, 7},
+	{"TG9",		MenuHandler,	s_TGMenu, 8},
+	{"TG10",		MenuHandler,	s_TGMenu, 9},
+	{"TG11",		MenuHandler,	s_TGMenu, 10},
+	{"TG12",		MenuHandler,	s_TGMenu, 11},
+	{"TG13",		MenuHandler,	s_TGMenu, 12},
+	{"TG14",		MenuHandler,	s_TGMenu, 13},
+	{"TG15",		MenuHandler,	s_TGMenu, 14},
+	{"TG16",		MenuHandler,	s_TGMenu, 15},
 #endif
 	{"Effects",	MenuHandler,	s_EffectsMenu},
 	{"Performance",	MenuHandler, s_PerformanceMenu},