Line data    Source code

       1             : #include "SerialMIDI_Parser.hpp"
       2             : 
       3             : BEGIN_CS_NAMESPACE
       4             : 
       5         459 : MIDI_read_t SerialMIDI_Parser::parse(uint8_t midiByte) {
       6         459 :     DEBUGFN(hex << NAMEDVALUE(midiByte) << dec);
       7             : #if !IGNORE_SYSEX
       8             :     // If the previous byte was a SysExStart
       9             :     // I have to handle a start in the next time step, because a start can also
      10             :     // end the previous message. When that happens, I have to return 
      11             :     // SYSEX_MESSAGE without resetting the buffer.
      12             :     // Then, after handling the message by the user, I do have to reset the 
      13             :     // buffer.
      14         459 :     if (midimsg.header == SysExStart && !sysexbuffer.isReceiving()) {
      15          25 :         startSysEx();
      16          25 :         addSysExByte(SysExStart);
      17          25 :     }
      18             : #endif
      19         459 :     if (isStatus(midiByte)) {
      20             :         // If it's a status byte (first byte)
      21          91 :         if (midiByte >= 0xF8) {
      22             :             // If it's a Real-Time message
      23           8 :             return static_cast<MIDI_read_t>(midiByte);
      24             :         } else {
      25             :             // Normal header
      26          83 :             uint8_t previousHeader = midimsg.header;
      27          83 :             midimsg.header = midiByte;
      28          83 :             thirdByte = false;
      29             : #if !IGNORE_SYSEX
      30          83 :             if (midimsg.header == TuneRequest) {
      31             :                 ; // Tune request (not implemented)
      32           0 :             }
      33          83 :             if (previousHeader == SysExStart) {
      34             :                 // If we're currently receiving a SysEx message
      35          25 :                 addSysExByte(SysExEnd); // Try to add SysExEnd byte to buffer
      36             :                 // Even if the buffer is full, end the message anyway
      37          25 :                 endSysEx();
      38          25 :                 return SYSEX_MESSAGE;
      39             :             }
      40             : #else
      41             :             (void)previousHeader;
      42             : #endif // IGNORE_SYSEX
      43             :         }
      44          58 :     } else {
      45             :         // If it's a data byte
      46         368 :         if (midimsg.header == 0) {
      47           3 :             DEBUGFN("Warning: No header");
      48             :             ; // Ignore
      49         368 :         } else if (thirdByte) {
      50             :             // Third byte of three (data 2)
      51          23 :             midimsg.data2 = midiByte;
      52          23 :             thirdByte = false;
      53          23 :             return CHANNEL_MESSAGE;
      54             :         } else {
      55             :             // Second byte (data 1) or SysEx data
      56         342 :             if (midimsg.header < 0xC0 || midimsg.header == 0xE0) {
      57             :                 // Note, Aftertouch, CC or Pitch Bend
      58          23 :                 midimsg.data1 = midiByte;
      59          23 :                 thirdByte = true;
      60         342 :             } else if (midimsg.header < 0xE0) {
      61             :                 // Program Change or Channel Pressure
      62           6 :                 midimsg.data1 = midiByte;
      63           6 :                 return CHANNEL_MESSAGE;
      64             :             }
      65             : #if !IGNORE_SYSEX
      66         313 :             else if (midimsg.header == SysExStart) {
      67             :                 // SysEx data byte
      68         307 :                 addSysExByte(midiByte);
      69         307 :             }
      70             : #endif // IGNORE_SYSEX
      71             :             else {
      72           6 :                 DEBUGFN("Data byte ignored");
      73             :             }
      74             :         }
      75             :     }
      76         397 :     return NO_MESSAGE;
      77         459 : }
      78             : 
      79             : END_CS_NAMESPACE