bool QLCMIDIProtocol::midiToInput(uchar cmd, uchar data1, uchar data2,
uchar midiChannel, quint32* channel,
uchar* value)
{
/* Check if cmd is a MIDI COMMAND byte */
if (!MIDI_IS_CMD(cmd))
return false;
/** Use a special handler function for system common messages */
if (MIDI_IS_SYSCOMMON(cmd))
return midiSysCommonToInput(cmd, data1, data2, channel, value);
/* Check that the command came on the correct MIDI channel */
if (midiChannel <= 0xF && MIDI_CH(cmd) != midiChannel)
return false;
switch(MIDI_CMD(cmd))
{
case MIDI_NOTE_OFF:
*channel = CHANNEL_OFFSET_NOTE + quint32(data1);
*value = 0;
return true;
case MIDI_NOTE_ON:
*channel = CHANNEL_OFFSET_NOTE + quint32(data1);
*value = MIDI2DMX(data2);
return true;
case MIDI_NOTE_AFTERTOUCH:
*channel = CHANNEL_OFFSET_NOTE_AFTERTOUCH + quint32(data1);
*value = MIDI2DMX(data2);
return true;
case MIDI_CONTROL_CHANGE:
*channel = CHANNEL_OFFSET_CONTROL_CHANGE + quint32(data1);
*value = MIDI2DMX(data2);
return true;
case MIDI_PROGRAM_CHANGE:
*channel = CHANNEL_OFFSET_PROGRAM_CHANGE;
*value = MIDI2DMX(data1);
return true;
case MIDI_CHANNEL_AFTERTOUCH:
*channel = CHANNEL_OFFSET_CHANNEL_AFTERTOUCH;
*value = MIDI2DMX(data1);
return true;
case MIDI_PITCH_WHEEL:
*channel = CHANNEL_OFFSET_PITCH_WHEEL;
*value = MIDI2DMX(data2);
return true;
default:
return false;
}
}
void AlsaMidiOutputDevice::writeFeedback(uchar cmd, uchar data1, uchar data2)
{
if (isOpen() == false)
return;
// Setup a common event structure for all values
snd_seq_event_t ev;
snd_seq_ev_clear(&ev);
snd_seq_ev_set_dest(&ev, m_receiver_address->client, m_receiver_address->port);
//snd_seq_ev_set_subs(&ev);
snd_seq_ev_set_direct(&ev);
uchar midiCmd = MIDI_CMD(cmd);
uchar midiCh = MIDI_CH(cmd);
bool invalidCmd = false;
switch(midiCmd)
{
case MIDI_NOTE_OFF:
snd_seq_ev_set_noteoff(&ev, midiCh, data1, data2);
break;
case MIDI_NOTE_ON:
snd_seq_ev_set_noteon(&ev, midiCh, data1, data2);
break;
case MIDI_CONTROL_CHANGE:
snd_seq_ev_set_controller(&ev, midiCh, data1, data2);
break;
case MIDI_PROGRAM_CHANGE:
snd_seq_ev_set_pgmchange(&ev, midiCh, data1);
break;
case MIDI_NOTE_AFTERTOUCH:
snd_seq_ev_set_keypress(&ev, midiCh, data1, data2);
break;
case MIDI_CHANNEL_AFTERTOUCH:
snd_seq_ev_set_chanpress(&ev, midiCh, data1);
break;
case MIDI_PITCH_WHEEL:
snd_seq_ev_set_pitchbend(&ev, midiCh, ((data1 & 0x7f) | ((data2 & 0x7f) << 7)) - 8192);
break;
default:
// What to do here ??
invalidCmd = true;
break;
}
if (!invalidCmd)
{
if (snd_seq_event_output(m_alsa, &ev) < 0)
qDebug() << "snd_seq_event_output ERROR";
}
// Make sure that all values go to the MIDI endpoint
snd_seq_drain_output(m_alsa);
}
