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Allow MIDIDecoder to handle multiple messages per pass

This commit is contained in:
Jack Andersen 2018-08-24 22:37:26 -10:00
parent f73e4f08fa
commit fd2a92e2c2
1 changed files with 135 additions and 135 deletions
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270
lib/audiodev/MIDIDecoder.cpp
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@ -41,124 +41,31 @@ MIDIDecoder::receiveBytes(std::vector<uint8_t>::const_iterator begin,
std::vector<uint8_t>::const_iterator end)
{
std::vector<uint8_t>::const_iterator it = begin;
if (it == end)
return begin;
uint8_t a = *it++;
uint8_t b;
if (a & 0x80)
m_status = a;
else
it--;
if (m_status == 0xff)
while (it != end)
{
/* Meta events (ignored for now) */
if (it == end)
return begin;
a = *it++;
uint8_t a = *it++;
uint8_t b;
if (a & 0x80)
m_status = a;
else
it--;
uint32_t length;
_readContinuedValue(it, end, length);
it += length;
}
else
{
uint8_t chan = m_status & 0xf;
switch (Status(m_status & 0xf0))
{
case Status::NoteOff:
if (m_status == 0xff)
{
/* Meta events (ignored for now) */
if (it == end)
return begin;
a = *it++;
if (it == end)
return begin;
b = *it++;
m_out.noteOff(chan, clamp7(a), clamp7(b));
break;
}
case Status::NoteOn:
uint32_t length;
_readContinuedValue(it, end, length);
it += length;
} else
{
if (it == end)
return begin;
a = *it++;
if (it == end)
return begin;
b = *it++;
m_out.noteOn(chan, clamp7(a), clamp7(b));
break;
}
case Status::NotePressure:
{
if (it == end)
return begin;
a = *it++;
if (it == end)
return begin;
b = *it++;
m_out.notePressure(chan, clamp7(a), clamp7(b));
break;
}
case Status::ControlChange:
{
if (it == end)
return begin;
a = *it++;
if (it == end)
return begin;
b = *it++;
m_out.controlChange(chan, clamp7(a), clamp7(b));
break;
}
case Status::ProgramChange:
{
if (it == end)
return begin;
a = *it++;
m_out.programChange(chan, clamp7(a));
break;
}
case Status::ChannelPressure:
{
if (it == end)
return begin;
a = *it++;
m_out.channelPressure(chan, clamp7(a));
break;
}
case Status::PitchBend:
{
if (it == end)
return begin;
a = *it++;
if (it == end)
return begin;
b = *it++;
m_out.pitchBend(chan, clamp7(b) * 128 + clamp7(a));
break;
}
case Status::SysEx:
{
switch (Status(m_status & 0xff))
uint8_t chan = m_status & 0xf;
switch (Status(m_status & 0xf0))
{
case Status::SysEx:
{
uint32_t len;
if (!_readContinuedValue(it, end, len) || end - it < len)
return begin;
m_out.sysex(&*it, len);
break;
}
case Status::TimecodeQuarterFrame:
{
if (it == end)
return begin;
a = *it++;
m_out.timeCodeQuarterFrame(a >> 4 & 0x7, a & 0xf);
break;
}
case Status::SongPositionPointer:
case Status::NoteOff:
{
if (it == end)
return begin;
@ -166,43 +73,136 @@ MIDIDecoder::receiveBytes(std::vector<uint8_t>::const_iterator begin,
if (it == end)
return begin;
b = *it++;
m_out.songPositionPointer(clamp7(b) * 128 + clamp7(a));
m_out.noteOff(chan, clamp7(a), clamp7(b));
break;
}
case Status::SongSelect:
case Status::NoteOn:
{
if (it == end)
return begin;
a = *it++;
m_out.songSelect(clamp7(a));
if (it == end)
return begin;
b = *it++;
m_out.noteOn(chan, clamp7(a), clamp7(b));
break;
}
case Status::TuneRequest:
m_out.tuneRequest();
case Status::NotePressure:
{
if (it == end)
return begin;
a = *it++;
if (it == end)
return begin;
b = *it++;
m_out.notePressure(chan, clamp7(a), clamp7(b));
break;
}
case Status::ControlChange:
{
if (it == end)
return begin;
a = *it++;
if (it == end)
return begin;
b = *it++;
m_out.controlChange(chan, clamp7(a), clamp7(b));
break;
}
case Status::ProgramChange:
{
if (it == end)
return begin;
a = *it++;
m_out.programChange(chan, clamp7(a));
break;
}
case Status::ChannelPressure:
{
if (it == end)
return begin;
a = *it++;
m_out.channelPressure(chan, clamp7(a));
break;
}
case Status::PitchBend:
{
if (it == end)
return begin;
a = *it++;
if (it == end)
return begin;
b = *it++;
m_out.pitchBend(chan, clamp7(b) * 128 + clamp7(a));
break;
}
case Status::SysEx:
{
switch (Status(m_status & 0xff))
{
case Status::SysEx:
{
uint32_t len;
if (!_readContinuedValue(it, end, len) || end - it < len)
return begin;
m_out.sysex(&*it, len);
break;
}
case Status::TimecodeQuarterFrame:
{
if (it == end)
return begin;
a = *it++;
m_out.timeCodeQuarterFrame(a >> 4 & 0x7, a & 0xf);
break;
}
case Status::SongPositionPointer:
{
if (it == end)
return begin;
a = *it++;
if (it == end)
return begin;
b = *it++;
m_out.songPositionPointer(clamp7(b) * 128 + clamp7(a));
break;
}
case Status::SongSelect:
{
if (it == end)
return begin;
a = *it++;
m_out.songSelect(clamp7(a));
break;
}
case Status::TuneRequest:
m_out.tuneRequest();
break;
case Status::Start:
m_out.startSeq();
break;
case Status::Continue:
m_out.continueSeq();
break;
case Status::Stop:
m_out.stopSeq();
break;
case Status::Reset:
m_out.reset();
break;
case Status::SysExTerm:
case Status::TimingClock:
case Status::ActiveSensing:
default:
break;
}
break;
}
default:
break;
case Status::Start:
m_out.startSeq();
break;
case Status::Continue:
m_out.continueSeq();
break;
case Status::Stop:
m_out.stopSeq();
break;
case Status::Reset:
m_out.reset();
break;
case Status::SysExTerm:
case Status::TimingClock:
case Status::ActiveSensing:
default: break;
}
break;
}
default: break;
}
}
return it;
}