Update serialmididevice.cpp

src/serialmididevice.cpp

@@ -83,26 +83,6 @@ void CSerialMIDIDevice::Process (void)
 	{
 		u8 uchData = Buffer[i];
 
-		if(uchData == 0xF0)
-		{
-			// SYSEX found
-			m_SerialMessage[m_nSysEx++]=uchData;
-			continue;
-		}
-
-		if(m_nSysEx > 0)
-		{
-			m_SerialMessage[m_nSysEx++]=uchData;
-			if ((uchData & 0x80) == 0x80 || m_nSysEx >= MAX_MIDI_MESSAGE)
-			{
-				if(uchData == 0xF7)
-					MIDIMessageHandler (m_SerialMessage, m_nSysEx);
-				m_nSysEx = 0;
-			}
-			continue;
-		}
-		else
-		{
 		switch (m_nSerialState)
 		{
 		case 0:
@@ -112,6 +92,14 @@ void CSerialMIDIDevice::Process (void)
 			{
 				m_SerialMessage[m_nSerialState++] = uchData;
 			}
+			
+			if (uchData == 0xF0) // SysEx status Byte jumps to m_nSerialState=5 and iniciate reading
+			{
+				m_nSerialState = 5;
+				m_nSysEx = 0; 
+				goto MIDISysEx;
+			}
+			
 			break;
 
 		case 1:
@@ -133,22 +121,42 @@ void CSerialMIDIDevice::Process (void)
 
 				m_nSerialState = 4; // State 4 for test if 4th byte is a status byte or a data byte 
 			}
-	
 			break;
-			case 4:
+		case 4: // Running Status evaluation
 			
 			if ((uchData & 0x80) == 0)  // true data byte, false status byte
 			{
-					m_nSerialState = 1;
+				m_nSerialState = 1; // Byte 0 not change on Running Status
 				goto DATABytes;
 			}
+			else 
+			{
+				m_nSerialState = 0;
+				goto MIDIRestart;  // This is necessary in order to not miss the first byte
+				
+			}
+			break;
+		case 5: // SyxEx reading
+			MIDISysEx:
+			m_SerialMessage[m_nSysEx++] = uchData;
+			if (((uchData & 0x80) && m_nSysEx > 1 ) || m_nSysEx >= MAX_MIDI_MESSAGE)		
+			{
+				m_nSerialState = 0; //New Status byte ends SerialState 5 (SysEx reading)
+				if (uchData == 0xF7)
+				{
+					MIDIMessageHandler (m_SerialMessage, m_nSysEx);
+				}
+				else
+				{
+					goto MIDIRestart; //other status byte abort SysEx process and jump to MIDIRestart in order to not miss the byte
+				}
+			}
 			break;
 		default:
 			assert (0);
 			break;
 		}
 	}
-	}
 }
 
 void CSerialMIDIDevice::Send (const u8 *pMessage, size_t nLength, unsigned nCable)