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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/***************************************************************************
* jackmidi.cc
*
* Mo 25. Jan 11:26:06 CET 2016
* Copyright 2016 Christian Glöckner
* cgloeckner@freenet.de
****************************************************************************/
/*
* This file is part of DrumGizmo.
*
* DrumGizmo is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* DrumGizmo is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with DrumGizmo; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*/
#include <iostream>
#include <cassert>
#include "cpp11fix.h" // required for c++11
#include "jackmidi.h"
int const NOTE_ON = 0x90;
JackMidiInputEngine::JackMidiInputEngine(JackClient &client)
: AudioInputEngine{}, JackProcess{}, client(client), port{nullptr},
midimap{}, midi_mapper{}, pos{0u}, list{nullptr}, listsize{0u}
{
client.add(*this);
}
JackMidiInputEngine::~JackMidiInputEngine() { client.remove(*this); }
bool JackMidiInputEngine::isMidiEngine() { return true; }
bool JackMidiInputEngine::init(Instruments &instruments)
{
if (midimap == "")
{
std::cerr << "[JackMidiInputEngine] Missing midimap filename\n";
return false;
}
MidiMapParser p{midimap};
if (p.parse())
{
std::cerr << "[JackmidiInputEngine] Failed to parse midimap '" << midimap
<< "'\n";
return false;
}
midi_mapper.midimap = p.midimap;
for (auto i = 0u; i < instruments.size(); ++i)
{
auto name = instruments[i]->name();
midi_mapper.instrmap[name] = i;
}
port = std::make_unique<JackPort>(client, "drumgizmo_midiin",
JACK_DEFAULT_MIDI_TYPE, JackPortIsInput);
return true;
}
void JackMidiInputEngine::setParm(std::string parm, std::string value)
{
if (parm == "midimap")
{
// apply midimap filename
midimap = value;
}
else
{
std::cerr << "[JackMidiInputEngine] Unsupported parameter '" << parm
<< "'\n";
}
}
bool JackMidiInputEngine::start()
{
client.activate();
return true;
}
void JackMidiInputEngine::stop() {}
void JackMidiInputEngine::pre() {}
event_t *JackMidiInputEngine::run(size_t pos, size_t len, size_t *nevents)
{
*nevents = listsize;
event_t *l = list;
printf("Owning raw pointer at drumgizmo/input/jackmidi.cc - GET RID OF "
"THEM!\n");
list = (event_t *)malloc(sizeof(event_t) * 1000);
listsize = 0;
return l;
}
void JackMidiInputEngine::post() {}
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);
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_ON) != NOTE_ON)
{
continue;
}
int key = event.buffer[1];
int velocity = event.buffer[2];
printf("Event key:%d vel:%d\n", key, velocity);
int k = midi_mapper.lookup(key);
if (k != -1 && velocity)
{
list[listsize].type = TYPE_ONSET;
list[listsize].instrument = k;
list[listsize].velocity = velocity / 127.0;
list[listsize].offset = event.time;
++listsize;
}
}
jack_midi_clear_buffer(buffer);
pos += num_frames;
}
/*
DrumKit* kit;
size_t pos;
EventQueue *eventqueue;
*/
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