Implement MIDI CC 120 (All Sound Off) and 123 (All Notes Off) (#127)

Implement MIDI CC 120 (All Sound Off) and 123 (All Notes Off)

Closes https://github.com/probonopd/MiniDexed/issues/126

src/mididevice.cpp

@@ -40,6 +40,8 @@
 	#define MIDI_CC_FREQUENCY_CUTOFF	74
 	#define MIDI_CC_REVERB_LEVEL		91
 	#define MIDI_CC_DETUNE_LEVEL		94
+	#define MIDI_CC_ALL_SOUND_OFF		120
+	#define MIDI_CC_ALL_NOTES_OFF		123
 #define MIDI_PROGRAM_CHANGE	0b1100
 #define MIDI_PITCH_BEND		0b1110
 
@@ -194,6 +196,14 @@ void CMIDIDevice::MIDIMessageHandler (const u8 *pMessage, size_t nLength, unsign
 				case MIDI_CC_DETUNE_LEVEL:
 					m_pSynthesizer->SetMasterTune (pMessage[2], nTG);
 					break;
+
+				case MIDI_CC_ALL_SOUND_OFF:
+					m_pSynthesizer->panic (pMessage[2], nTG);
+					break;
+
+				case MIDI_CC_ALL_NOTES_OFF:
+					m_pSynthesizer->notesOff (pMessage[2], nTG);
+					break;
 				}
 				break;
 

src/minidexed.cpp

@@ -521,6 +521,24 @@ void CMiniDexed::setSustain(bool sustain, unsigned nTG)
 	m_pTG[nTG]->setSustain (sustain);
 }
 
+void CMiniDexed::panic(uint8_t value, unsigned nTG)
+{
+	assert (nTG < CConfig::ToneGenerators);
+	assert (m_pTG[nTG]);
+	if (value == 0) {
+		m_pTG[nTG]->panic ();
+	}
+}
+
+void CMiniDexed::notesOff(uint8_t value, unsigned nTG)
+{
+	assert (nTG < CConfig::ToneGenerators);
+	assert (m_pTG[nTG]);
+	if (value == 0) {
+		m_pTG[nTG]->notesOff ();
+	}
+}
+
 void CMiniDexed::setModWheel (uint8_t value, unsigned nTG)
 {
 	assert (nTG < CConfig::ToneGenerators);

src/minidexed.h

@@ -76,6 +76,8 @@ public:
 	void keydown (int16_t pitch, uint8_t velocity, unsigned nTG);
 
 	void setSustain (bool sustain, unsigned nTG);
+	void panic (uint8_t value, unsigned nTG);
+	void notesOff (uint8_t value, unsigned nTG);
 	void setModWheel (uint8_t value, unsigned nTG);
 	void setPitchbend (int16_t value, unsigned nTG);
 	void ControllersRefresh (unsigned nTG);