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#include <iostream>
#include <cassert>
#include "cpp11fix.h"
#include "jackmidi.h"
static int const NOTE_ON = 0x90;
static int const NOTE_MASK = 0xF0;
JackMidiInputEngine::JackMidiInputEngine(JackClient& client)
: AudioInputEngineMidi{}
, JackProcess{}
, client(client)
, port{nullptr}
, pos{0u}
, events{}
{
client.add(*this);
}
JackMidiInputEngine::~JackMidiInputEngine()
{
client.remove(*this);
}
bool JackMidiInputEngine::init(const Instruments& instruments)
{
if(!loadMidiMap(midimap_file, instruments))
{
std::cerr << "[MidifileInputEngine] Failed to parse midimap '"
<< midimap_file << "'\n";
return false;
}
port = std::make_unique<JackPort>(client, "drumgizmo_midiin",
JACK_DEFAULT_MIDI_TYPE,
JackPortIsInput);
return true;
}
void JackMidiInputEngine::setParm(const std::string& parm, const std::string& value)
{
if(parm == "midimap")
{
midimap_file = value;
}
else
{
std::cerr << "[JackMidiInputEngine] Unsupported parameter '" << parm
<< "'\n";
}
}
bool JackMidiInputEngine::start()
{
client.activate();
return true;
}
void JackMidiInputEngine::stop()
{
}
void JackMidiInputEngine::pre()
{
}
void JackMidiInputEngine::run(size_t pos, size_t len,
std::vector<event_t>& events)
{
assert(events.empty());
std::swap(events, this->events);
}
void JackMidiInputEngine::post()
{
}
bool JackMidiInputEngine::isFreewheeling() const
{
return client.isFreewheeling();
}
void JackMidiInputEngine::process(jack_nframes_t num_frames)
{
assert(port != nullptr);
void* buffer = jack_port_get_buffer(port->port, num_frames);
jack_nframes_t num_events = jack_midi_get_event_count(buffer);
assert(events.empty());
events.reserve(num_events);
for(jack_nframes_t i = 0; i < num_events; ++i)
{
jack_midi_event_t event;
jack_midi_event_get(&event, buffer, i);
if(event.size != 3)
{
continue;
}
if((event.buffer[0] & NOTE_MASK) != NOTE_ON)
{
continue;
}
int key = event.buffer[1];
int velocity = event.buffer[2];
printf("Event key:%d vel:%d\n", key, velocity);
int k = mmap.lookup(key);
if(k != -1 && velocity)
{
events.push_back({TYPE_ONSET, (size_t)k, event.time, velocity / 127.f});
}
}
jack_midi_clear_buffer(buffer);
pos += num_frames;
}
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