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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/***************************************************************************
* alsamidi.cc
*
* Copyright 2021 corrados
****************************************************************************/
/*
* 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 "alsamidi.h"
AlsaMidiInputEngine::AlsaMidiInputEngine()
: AudioInputEngineMidi{}
, in_port(0)
, seq_handle{nullptr}
, pos{0u}
, events{}
{
}
AlsaMidiInputEngine::~AlsaMidiInputEngine()
{
}
bool AlsaMidiInputEngine::init(const Instruments& instruments)
{
if(!loadMidiMap(midimap_file, instruments))
{
std::cerr << "[MidifileInputEngine] Failed to parse midimap '"
<< midimap_file << "'\n";
return false;
}
snd_seq_open(&seq_handle, "default", SND_SEQ_OPEN_INPUT, 0);
snd_seq_set_client_name(seq_handle, "Midi Listener");
in_port =
snd_seq_create_simple_port(seq_handle, "listen:in",
SND_SEQ_PORT_CAP_WRITE |
SND_SEQ_PORT_CAP_SUBS_WRITE,
SND_SEQ_PORT_TYPE_APPLICATION);
return true;
}
void AlsaMidiInputEngine::setParm(const std::string& parm, const std::string& value)
{
if(parm == "midimap")
{
// apply midimap filename
midimap_file = value;
}
else
{
std::cerr << "[AlsaMidiInputEngine] Unsupported parameter '" << parm
<< "'\n";
}
}
bool AlsaMidiInputEngine::start()
{
return true;
}
void AlsaMidiInputEngine::stop()
{
}
void AlsaMidiInputEngine::pre()
{
}
void AlsaMidiInputEngine::run(size_t pos, size_t len,
std::vector<event_t>& events)
{
assert(events.empty());
snd_seq_event_t* ev = nullptr;
snd_seq_event_input(seq_handle, &ev);
processNote(ev->data.raw8.d, 12, ev->data.time.tick, events);
}
void AlsaMidiInputEngine::post()
{
}
bool AlsaMidiInputEngine::isFreewheeling() const
{
return true;
}
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