/*
* AlsaMidiDeviceProvider.java
*
* This file is part of Tritonus: http://www.tritonus.org/
*/
/*
* Copyright (c) 1999 - 2001 by Matthias Pfisterer
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Library 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 Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
/*
|<--- this code is formatted to fit into 80 columns --->|
*/
package org.tritonus.midi.device.alsa;
import java.util.ArrayList;
import java.util.List;
import java.util.Iterator;
import javax.sound.midi.MidiDevice;
import javax.sound.midi.spi.MidiDeviceProvider;
import org.tritonus.lowlevel.alsa.AlsaSeq;
import org.tritonus.lowlevel.alsa.AlsaSeqClientInfo;
import org.tritonus.lowlevel.alsa.AlsaSeqPortInfo;
import org.tritonus.share.TDebug;
public class AlsaMidiDeviceProvider
extends MidiDeviceProvider
{
// perhaps move to superclass
private static final MidiDevice.Info[] EMPTY_INFO_ARRAY = new MidiDevice.Info[0];
private static final int READ_CAPABILITY = AlsaSeq.SND_SEQ_PORT_CAP_READ | AlsaSeq.SND_SEQ_PORT_CAP_SUBS_READ;
private static final int WRITE_CAPABILITY = AlsaSeq.SND_SEQ_PORT_CAP_WRITE | AlsaSeq.SND_SEQ_PORT_CAP_SUBS_WRITE;
private static List<MidiDevice> m_devices;
private static AlsaSeq m_alsaSeq;
public AlsaMidiDeviceProvider()
{
if (TDebug.TraceMidiDeviceProvider) { TDebug.out("AlsaMidiDeviceProvider.<init>(): begin"); }
synchronized (AlsaMidiDeviceProvider.class)
{
if (m_devices == null)
{
m_devices = new ArrayList<MidiDevice>();
if (TDebug.TraceMidiDeviceProvider) { TDebug.out("AlsaMidiDeviceProvider.<init>(): creating AlsaSeq..."); }
// try{
m_alsaSeq = new AlsaSeq("Tritonus ALSA device manager");
// }catch (Throwable t) { TDebug.out(t); }
if (TDebug.TraceMidiDeviceProvider) { TDebug.out("AlsaMidiDeviceProvider.<init>(): ...done"); }
scanPorts();
}
}
if (TDebug.TraceMidiDeviceProvider) { TDebug.out("AlsaMidiDeviceProvider.<init>(): end"); }
}
public MidiDevice.Info[] getDeviceInfo()
{
if (TDebug.TraceMidiDeviceProvider) { TDebug.out("AlsaMidiDeviceProvider.getDeviceInfo(): begin"); }
List<MidiDevice.Info> infoList = new ArrayList<MidiDevice.Info>();
Iterator<MidiDevice> iterator = m_devices.iterator();
while (iterator.hasNext())
{
MidiDevice device = iterator.next();
MidiDevice.Info info = device.getDeviceInfo();
infoList.add(info);
}
MidiDevice.Info[] infos = infoList.toArray(EMPTY_INFO_ARRAY);
if (TDebug.TraceMidiDeviceProvider) { TDebug.out("AlsaMidiDeviceProvider.getDeviceInfo(): end"); }
return infos;
}
public MidiDevice getDevice(MidiDevice.Info info)
{
if (TDebug.TraceMidiDeviceProvider) { TDebug.out("AlsaMidiDeviceProvider.getDevice(): begin"); }
MidiDevice returnedDevice = null;
Iterator<MidiDevice> iterator = m_devices.iterator();
while (iterator.hasNext())
{
MidiDevice device = iterator.next();
MidiDevice.Info info2 = device.getDeviceInfo();
if (info != null && info.equals(info2))
{
returnedDevice = device;
break;
}
}
if (returnedDevice == null)
{
throw new IllegalArgumentException("no device for " + info);
}
if (TDebug.TraceMidiDeviceProvider) { TDebug.out("AlsaMidiDeviceProvider.getDevice(): end"); }
return returnedDevice;
}
private void scanPorts()
{
if (TDebug.TraceMidiDeviceProvider || TDebug.TracePortScan) { TDebug.out("AlsaMidiDeviceProvider.scanPorts(): begin"); }
Iterator clients = m_alsaSeq.getClientInfos();
while (clients.hasNext())
{
AlsaSeqClientInfo clientInfo = (AlsaSeqClientInfo) clients.next();
int nClient = clientInfo.getClient();
if (TDebug.TracePortScan) { TDebug.out("AlsaMidiDeviceProvider.scanPorts(): client: " + nClient); }
Iterator ports = m_alsaSeq.getPortInfos(nClient);
while (ports.hasNext())
{
AlsaSeqPortInfo portInfo = (AlsaSeqPortInfo) ports.next();
handlePort(clientInfo, portInfo);
}
}
if (TDebug.TraceMidiDeviceProvider || TDebug.TracePortScan) { TDebug.out("AlsaMidiDeviceProvider.scanPorts(): end"); }
}
private void handlePort(AlsaSeqClientInfo clientInfo,
AlsaSeqPortInfo portInfo)
{
int nClient = clientInfo.getClient();
int nPort = portInfo.getPort();
int nType = portInfo.getType();
int nCapability = portInfo.getCapability();
int nSynthVoices = portInfo.getSynthVoices();
if (TDebug.TracePortScan)
{
TDebug.out("AlsaMidiDeviceProvider.scanPorts(): port: " + nPort);
TDebug.out("AlsaMidiDeviceProvider.scanPorts(): type: " + nType);
TDebug.out("AlsaMidiDeviceProvider.scanPorts(): cap: " + nCapability);
TDebug.out("AlsaMidiDeviceProvider.scanPorts(): midi channels: " + portInfo.getMidiChannels());
TDebug.out("AlsaMidiDeviceProvider.scanPorts(): midi voices: " + portInfo.getMidiVoices());
TDebug.out("AlsaMidiDeviceProvider.scanPorts(): synth voices: " + portInfo.getSynthVoices());
}
if ((nType & AlsaSeq.SND_SEQ_PORT_TYPE_MIDI_GENERIC) != 0)
{
// TDebug.out("generic midi");
MidiDevice device = null;
if ((nType & (AlsaSeq.SND_SEQ_PORT_TYPE_SYNTH | AlsaSeq.SND_SEQ_PORT_TYPE_DIRECT_SAMPLE | AlsaSeq.SND_SEQ_PORT_TYPE_SAMPLE)) != 0)
{
boolean bWriteSubscriptionAllowed = (nCapability & WRITE_CAPABILITY) == WRITE_CAPABILITY;
if (bWriteSubscriptionAllowed)
{
device = new AlsaSynthesizer(nClient, nPort, nSynthVoices);
}
else
{
if (TDebug.TraceMidiDeviceProvider) { TDebug.out("AlsaMidiDeviceProvider.getDevice(): port does not allows write subscription, not used"); }
}
}
else // ordinary midi port
{
boolean bReadSubscriptionAllowed = (nCapability & READ_CAPABILITY) == READ_CAPABILITY;
boolean bWriteSubscriptionAllowed = (nCapability & WRITE_CAPABILITY) == WRITE_CAPABILITY;
if (bReadSubscriptionAllowed || bWriteSubscriptionAllowed)
{
device = new AlsaMidiDevice(nClient, nPort, bReadSubscriptionAllowed, bWriteSubscriptionAllowed);
}
else
{
if (TDebug.TraceMidiDeviceProvider) { TDebug.out("AlsaMidiDeviceProvider.getDevice(): port allows neither read nor write subscription, not used"); }
}
}
if (device != null)
{
m_devices.add(device);
}
}
}
}
/*** AlsaMidiDeviceProvider.java ***/