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// DSMIDIWiFi Server - Forwards MIDI messages between local appliations
// and Nintendo DS handhelds in the local network.
//
// This is part of DSMI - DS Music Interface - http://dsmi.tobw.net
//
// Copyright (c) 2018 mirabilos (tg@debian.org)
// Copyright (C) 2007 Tobias Weyand (me@dsmi.tobw.net)
//
// This program 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.
//
// This program 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 this program; if not, write to the Free Software Foundation, Inc.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#include "midi2udpthread.h"
#include <arpa/inet.h>
Midi2UdpThread::Midi2UdpThread(QObject *parent)
:QThread(parent)
{
abort = false;
}
Midi2UdpThread::~Midi2UdpThread()
{
mutex.lock();
abort = true;
mutex.unlock();
wait();
freeSeq();
}
bool
Midi2UdpThread::go(int note)
{
this->raisenote = note - 69;
// Initialise midi port
if (!initSeq())
return (false);
// start expecing MIDI events
npfd = snd_seq_poll_descriptors_count(seq_handle, POLLIN);
pfd = (struct pollfd *)calloc(npfd, sizeof(struct pollfd));
snd_seq_poll_descriptors(seq_handle, pfd, npfd, POLLIN);
// run thread
if (!isRunning())
start(LowPriority);
return (true);
}
void
Midi2UdpThread::add_ip(string ip)
{
// Duplicates won't be added
ds_ips.insert(ip);
}
void
Midi2UdpThread::run()
{
QUdpSocket *udpSocket;
udpSocket = new QUdpSocket(0);
forever {
if (abort) {
delete udpSocket;
return;
}
if (poll(pfd, npfd, 250) <= 0)
continue;
// Get MIDI event
snd_seq_event_input(seq_handle, &midi_event);
if (midi_event->type == SND_SEQ_EVENT_NOTEON ||
midi_event->type == SND_SEQ_EVENT_NOTEOFF) {
unsigned char thenote = midi_event->data.note.note;
thenote += this->raisenote;
if (thenote > 127) {
printf("midi2udp: dropping note %u raised to out of bounds %u\n",
midi_event->data.note.note, thenote);
continue;
}
midi_event->data.note.note = thenote;
}
long len = snd_midi_event_decode(eventparser, midimsg,
MAX_MIDI_MESSAGE_LENGTH, midi_event);
if (len < 0) {
printf("midi2udp: Error decoding midi event!\n");
} else {
printf("midi2udp: got midi event: ");
for (int i = 0; i < len; ++i)
printf("0x%02X ", midimsg[i]);
printf("\n");
// Send it over UDP
for (set<string>::iterator ip_it = ds_ips.begin();
ip_it != ds_ips.end(); ++ip_it) {
QString toS((*ip_it).c_str());
printf("sending to %s\n", (*ip_it).c_str());
QHostAddress to(toS);
udpSocket->writeDatagram((char*)midimsg,
len, to, DS_PORT);
}
}
snd_seq_free_event(midi_event);
snd_midi_event_reset_decode(eventparser);
}
}
bool
Midi2UdpThread::initSeq()
{
if (snd_seq_open(&seq_handle, "default", SND_SEQ_OPEN_INPUT, 0) < 0) {
printf("midi2udp: Error opening ALSA sequencer.\n");
seq_handle = 0;
return (false);
}
snd_seq_set_client_name(seq_handle, "DSMIDIWIFI MIDI2UDP");
if ((midi_in_port = snd_seq_create_simple_port(seq_handle,
"DSMIDIWIFI MIDI2UDP IN",
SND_SEQ_PORT_CAP_WRITE | SND_SEQ_PORT_CAP_SUBS_WRITE,
SND_SEQ_PORT_TYPE_APPLICATION)) < 0) {
printf("midi2udp: Error creating MIDI port!\n");
out:
snd_seq_close(seq_handle);
seq_handle = 0;
return (false);
}
if (snd_midi_event_new(MAX_MIDI_MESSAGE_LENGTH, &eventparser)) {
printf("midi2udp: Error making midi event parser!\n");
goto out;
}
snd_midi_event_init(eventparser);
midi_event = (snd_seq_event_t*)malloc(sizeof(snd_seq_event_t));
return (true);
}
void
Midi2UdpThread::freeSeq()
{
if (seq_handle && (snd_seq_close(seq_handle) < 0))
printf("midi2udp: Error closing socket!\n");
}
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