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::writeChannel(ushort channel, uchar value)
{
// m_universe contains scaled values (0-127), so we have to compare scaled value as well
// however, since writeUniverse scales the value again, we have to store unscaled value.
char scaled = DMX2MIDI(value);
if (channel < ushort(m_universe.size()) && m_universe[channel] != scaled)
{
QByteArray tmp(m_universe);
for (uchar ch = 0; ch < MAX_MIDI_DMX_CHANNELS && ch < tmp.size(); ++ch)
{
char midi = tmp[ch];
tmp[ch] = (char)MIDI2DMX(midi);
}
tmp[channel] = value;
writeUniverse(tmp);
}
}
