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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 Lesser General Public License as published by
* the Free Software Foundation; either version 3 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser 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"
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")
{
// apply midimap filename
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);
// The event list is assumed to be empty here.
// It might not be though in case the system is under heavy load.
// Make room for both the new and old events to make sure we don't throw
// anything away.
events.reserve(events.size() + num_events);
for(jack_nframes_t i = 0; i < num_events; ++i)
{
jack_midi_event_t event;
jack_midi_event_get(&event, buffer, i);
processNote(event.buffer, event.size, event.time, events);
}
jack_midi_clear_buffer(buffer);
pos += num_frames;
}
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