// Handle decoding incoming MIDI traffic a byte at a time -- remembers
// what it needs to from one call to the next.
//
// This is a private function & not meant to be called from outside this class.
// It's used whenever data is available from the serial port.
//
void Midi::recvByte(int value)
{
int tmp;
int channel;
int bigval; /* temp 14-bit value for pitch, song pos */
if (recvMode_ & MODE_PROPRIETARY
&& value != STATUS_END_PROPRIETARY)
{
/* If proprietary handling compiled in, just pass all data received
* after a START_PROPRIETARY event to proprietary_decode
* until get an END_PROPRIETARY event
*/
#ifdef CONFIG_MIDI_PROPRIETARY
proprietaryDecode(value);
#endif
return;
}
if (value & 0x80) {
/* All < 0xf0 events get at least 1 arg byte so
* it's ok to mask off the low 4 bits to figure
* out how to handle the event for < 0xf0 events.
*/
tmp = value;
if (tmp < 0xf0)
tmp &= 0xf0;
switch (tmp) {
/* These status events take 2 bytes as arguments */
case STATUS_EVENT_NOTE_OFF:
case STATUS_EVENT_NOTE_ON:
case STATUS_EVENT_VELOCITY_CHANGE:
case STATUS_EVENT_CONTROL_CHANGE:
case STATUS_PITCH_CHANGE:
case STATUS_SONG_POSITION:
recvBytesNeeded_ = 2;
recvByteCount_ = 0;
recvEvent_ = value;
break;
/* 1 byte arguments */
case STATUS_EVENT_PROGRAM_CHANGE:
case STATUS_AFTER_TOUCH:
case STATUS_SONG_SELECT:
recvBytesNeeded_ = 1;
recvByteCount_ = 0;
recvEvent_ = value;
return;
/* No arguments ( > 0xf0 events) */
case STATUS_START_PROPRIETARY:
recvMode_ |= MODE_PROPRIETARY;
#ifdef CONFIG_MIDI_PROPRIETARY
proprietaryDecodeStart();
#endif
break;
case STATUS_END_PROPRIETARY:
recvMode_ &= ~MODE_PROPRIETARY;
#ifdef CONFIG_MIDI_PROPRIETARY
proprietaryDecodeEnd();
#endif
break;
case STATUS_TUNE_REQUEST:
handleTuneRequest();
break;
case STATUS_SYNC:
handleSync();
break;
case STATUS_START:
handleStart();
break;
case STATUS_CONTINUE:
handleContinue();
break;
case STATUS_STOP:
handleStop();
break;
case STATUS_ACTIVE_SENSE:
handleActiveSense();
break;
case STATUS_RESET:
handleReset();
break;
}
return;
}
if (++recvByteCount_ == recvBytesNeeded_) {
/* Copy out the channel (if applicable; in some cases this will be meaningless,
* but in those cases the value will be ignored)
*/
channel = (recvEvent_ & 0x0f) + 1;
tmp = recvEvent_;
if (tmp < 0xf0) {
tmp &= 0xf0;
}
/* See if this event matches our MIDI channel
* (or we're accepting for all channels)
*/
if (!channelIn_
|| (channel == channelIn_)
|| (tmp >= 0xf0))
{
switch (tmp) {
case STATUS_EVENT_NOTE_ON:
/* If velocity is 0, it's actually a note off & should fall thru
* to the note off case
*/
if (value) {
handleNoteOn(channel, recvArg0_, value);
break;
}
case STATUS_EVENT_NOTE_OFF:
handleNoteOff(channel, recvArg0_, value);
break;
case STATUS_EVENT_VELOCITY_CHANGE:
handleVelocityChange(channel, recvArg0_, value);
break;
case STATUS_EVENT_CONTROL_CHANGE:
handleControlChange(channel, recvArg0_, value);
break;
case STATUS_EVENT_PROGRAM_CHANGE:
handleProgramChange(channel, value);
break;
case STATUS_AFTER_TOUCH:
handleAfterTouch(channel, value);
break;
case STATUS_PITCH_CHANGE:
bigval = (value << 7) | recvArg0_;
handlePitchChange(bigval);
break;
case STATUS_SONG_POSITION:
bigval = (value << 7) | recvArg0_;
handleSongPosition(bigval);
break;
case STATUS_SONG_SELECT:
handleSongSelect(value);
break;
}
}
/* Just reset the byte count; keep the same event -- might get more messages
trailing from current event.
*/
recvByteCount_ = 0;
}
recvArg0_ = value;
}
// Handle decoding incoming MIDI traffic a byte at a time -- remembers
// what it needs to from one call to the next.
//
// This is a private function & not meant to be called from outside this class.
// It's used whenever data is available from the serial port.
//
void USBMidi::dispatchPacket(uint32 p)
{
union EVENT_t e;
e.i=p;
// !!!!!!!!!!!!!!!! Add a sysex handler FIX THIS VERY VERY SHORTLY !!!!!!!!!!!!!!
if (recvMode_ & MODE_PROPRIETARY
&& CIN_IS_SYSEX(e.p.cin))
{
/* If sysex handling compiled in, just pass all data received
* to the sysex handler
*/
#ifdef CONFIG_MIDI_PROPRIETARY
// handleSysex(p);
#endif
return;
}
switch (e.p.cin) {
case CIN_3BYTE_SYS_COMMON:
if (e.p.midi0 == MIDIv1_SONG_POSITION_PTR) {
handleSongPosition(((uint16)e.p.midi2)<<7|((uint16)e.p.midi1));
}
break;
case CIN_2BYTE_SYS_COMMON:
switch (e.p.midi0) {
case MIDIv1_SONG_SELECT:
handleSongSelect(e.p.midi1);
break;
case MIDIv1_MTC_QUARTER_FRAME:
// reference library doesnt handle quarter frame.
break;
}
break;
case CIN_NOTE_OFF:
handleNoteOff(MIDIv1_VOICE_CHANNEL(e.p.midi0), e.p.midi1, e.p.midi2);
break;
case CIN_NOTE_ON:
handleNoteOn(MIDIv1_VOICE_CHANNEL(e.p.midi0), e.p.midi1, e.p.midi2);
break;
case CIN_AFTER_TOUCH:
handleVelocityChange(MIDIv1_VOICE_CHANNEL(e.p.midi0), e.p.midi1, e.p.midi2);
break;
case CIN_CONTROL_CHANGE:
handleControlChange(MIDIv1_VOICE_CHANNEL(e.p.midi0), e.p.midi1, e.p.midi2);
break;
case CIN_PROGRAM_CHANGE:
handleProgramChange(MIDIv1_VOICE_CHANNEL(e.p.midi0), e.p.midi1);
break;
case CIN_CHANNEL_PRESSURE:
handleAfterTouch(MIDIv1_VOICE_CHANNEL(e.p.midi0), e.p.midi1);
break;
case CIN_PITCH_WHEEL:
handlePitchChange(((uint16)e.p.midi2)<<7|((uint16)e.p.midi1));
break;
case CIN_1BYTE:
switch (e.p.midi0) {
case MIDIv1_CLOCK:
handleSync();
break;
case MIDIv1_TICK:
break;
case MIDIv1_START:
handleStart();
break;
case MIDIv1_CONTINUE:
handleContinue();
break;
case MIDIv1_STOP:
handleStop();
break;
case MIDIv1_ACTIVE_SENSE:
handleActiveSense();
break;
case MIDIv1_RESET:
handleReset();
break;
case MIDIv1_TUNE_REQUEST:
handleTuneRequest();
break;
default:
break;
}
break;
}
}
