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jeremybenn |
/* MidiSystem.java -- Access system MIDI resources
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Copyright (C) 2005 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package javax.sound.midi;
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import gnu.classpath.ServiceFactory;
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import java.io.File;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.OutputStream;
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import java.net.URL;
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import java.util.ArrayList;
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import java.util.List;
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import java.util.Iterator;
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import javax.sound.midi.spi.MidiDeviceProvider;
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import javax.sound.midi.spi.MidiFileReader;
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import javax.sound.midi.spi.MidiFileWriter;
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import javax.sound.midi.spi.SoundbankReader;
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/**
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* MidiSystem provides access to the computer system's MIDI resources,
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* as well as utility routines for reading MIDI files and more.
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*
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* @author Anthony Green (green@redhat.com)
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* @since 1.3
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*
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*/
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public class MidiSystem
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{
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private MidiSystem()
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{
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// Not instantiable.
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}
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/**
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* Get an array of all available MIDI devices.
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*
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* @return a possibly empty array of all available MIDI devices
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*/
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public static MidiDevice.Info[] getMidiDeviceInfo()
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{
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Iterator deviceProviders =
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ServiceFactory.lookupProviders(MidiDeviceProvider.class);
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List infoList = new ArrayList();
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while (deviceProviders.hasNext())
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{
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MidiDeviceProvider provider = (MidiDeviceProvider) deviceProviders.next();
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MidiDevice.Info[] infos = provider.getDeviceInfo();
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for (int i = infos.length; i > 0; )
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infoList.add(infos[--i]);
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}
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return (MidiDevice.Info[])
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infoList.toArray(new MidiDevice.Info[infoList.size()]);
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}
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/**
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* Get the specified MIDI device.
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*
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* @param info a description of the device we're looking for
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* @return the requested MIDI device
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* @throws MidiUnavailableException if no MIDI devices are configured or found
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* @throws IllegalArgumentException if the device described by info is not found
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*/
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public static MidiDevice getMidiDevice(MidiDevice.Info info)
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throws MidiUnavailableException
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{
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Iterator deviceProviders =
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ServiceFactory.lookupProviders(MidiDeviceProvider.class);
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if (! deviceProviders.hasNext())
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throw new MidiUnavailableException("No MIDI device providers available.");
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do
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{
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MidiDeviceProvider provider =
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(MidiDeviceProvider) deviceProviders.next();
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if (provider.isDeviceSupported(info))
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return provider.getDevice(info);
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} while (deviceProviders.hasNext());
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throw new IllegalArgumentException("MIDI device "
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+ info + " not available.");
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}
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/**
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* Get the default Receiver instance. This just picks the first one
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* it finds for now.
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*
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* @return the default Receiver instance
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* @throws MidiUnavailableException if no Receiver is found
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*/
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public static Receiver getReceiver() throws MidiUnavailableException
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{
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// TODO: The 1.5 spec has a fancy mechanism to specify the default
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// receiver device. For now, well just return the first one we find.
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MidiDevice.Info[] infos = getMidiDeviceInfo();
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for (int i = 0; i < infos.length; i++)
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{
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MidiDevice device = getMidiDevice(infos[i]);
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if (device instanceof Receiver)
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return (Receiver) device;
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}
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throw new MidiUnavailableException("No Receiver device available");
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}
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/**
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* Get the default Transmitter instance. This just picks the first one
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* it finds for now.
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*
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* @return the default Transmitter instance
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* @throws MidiUnavailableException if no Transmitter is found
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*/
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public static Transmitter getTransmitter() throws MidiUnavailableException
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{
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// TODO: The 1.5 spec has a fancy mechanism to specify the default
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// Transmitter device. For now, well just return the first one we find.
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MidiDevice.Info[] infos = getMidiDeviceInfo();
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for (int i = 0; i < infos.length; i++)
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{
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MidiDevice device = getMidiDevice(infos[i]);
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if (device instanceof Transmitter)
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return (Transmitter) device;
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}
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throw new MidiUnavailableException("No Transmitter device available");
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}
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/**
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* Get the default Synthesizer instance. This just picks the first one
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* it finds for now.
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*
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* @return the default Synthesizer instance
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* @throws MidiUnavailableException if no Synthesizer is found
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*/
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public static Synthesizer getSynthesizer() throws MidiUnavailableException
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{
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// TODO: The 1.5 spec has a fancy mechanism to specify the default
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// Synthesizer device. For now, well just return the first one we find.
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MidiDevice.Info[] infos = getMidiDeviceInfo();
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for (int i = 0; i < infos.length; i++)
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{
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MidiDevice device = getMidiDevice(infos[i]);
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if (device instanceof Synthesizer)
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return (Synthesizer) device;
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}
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throw new MidiUnavailableException("No Synthesizer device available");
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}
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/**
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* Get the default Sequencer instance. This just picks the first one
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* it finds for now.
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*
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* @return the default Sequencer instance
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* @throws MidiUnavailableException if no Sequencer is found
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*/
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public static Sequencer getSequencer() throws MidiUnavailableException
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{
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// TODO: The 1.5 spec has a fancy mechanism to specify the default
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// Sequencer device. For now, well just return the first one we find.
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MidiDevice.Info[] infos = getMidiDeviceInfo();
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for (int i = 0; i < infos.length; i++)
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{
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MidiDevice device = getMidiDevice(infos[i]);
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if (device instanceof Sequencer)
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return (Sequencer) device;
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}
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throw new MidiUnavailableException("No Sequencer device available");
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}
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/**
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* Read a Soundbank object from the given stream.
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*
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* @param stream the stream from which to read the Soundbank
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* @return the Soundbank object
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* @throws InvalidMidiDataException if we were unable to read the soundbank
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* @throws IOException if an I/O error happened while reading
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*/
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public static Soundbank getSoundbank(InputStream stream)
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throws InvalidMidiDataException, IOException
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{
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Iterator readers = ServiceFactory.lookupProviders(SoundbankReader.class);
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while (readers.hasNext())
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{
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SoundbankReader sr = (SoundbankReader) readers.next();
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Soundbank sb = sr.getSoundbank(stream);
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if (sb != null)
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return sb;
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}
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throw new InvalidMidiDataException("Cannot read soundbank from stream");
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}
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/**
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* Read a Soundbank object from the given url.
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*
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* @param url the url from which to read the Soundbank
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* @return the Soundbank object
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* @throws InvalidMidiDataException if we were unable to read the soundbank
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* @throws IOException if an I/O error happened while reading
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*/
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public static Soundbank getSoundbank(URL url)
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throws InvalidMidiDataException, IOException
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{
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Iterator readers = ServiceFactory.lookupProviders(SoundbankReader.class);
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while (readers.hasNext())
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{
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SoundbankReader sr = (SoundbankReader) readers.next();
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Soundbank sb = sr.getSoundbank(url);
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if (sb != null)
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return sb;
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}
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throw new InvalidMidiDataException("Cannot read from url " + url);
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}
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/**
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* Read a Soundbank object from the given file.
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*
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* @param file the file from which to read the Soundbank
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* @return the Soundbank object
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* @throws InvalidMidiDataException if we were unable to read the soundbank
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* @throws IOException if an I/O error happened while reading
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*/
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public static Soundbank getSoundbank(File file)
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throws InvalidMidiDataException, IOException
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{
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Iterator readers = ServiceFactory.lookupProviders(SoundbankReader.class);
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while (readers.hasNext())
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{
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SoundbankReader sr = (SoundbankReader) readers.next();
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Soundbank sb = sr.getSoundbank(file);
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if (sb != null)
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return sb;
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}
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throw new InvalidMidiDataException("Cannot read soundbank from file "
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+ file);
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}
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/**
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* Read a MidiFileFormat object from the given stream.
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*
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* @param stream the stream from which to read the MidiFileFormat
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* @return the MidiFileFormat object
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* @throws InvalidMidiDataException if we were unable to read the MidiFileFormat
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* @throws IOException if an I/O error happened while reading
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*/
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public static MidiFileFormat getMidiFileFormat(InputStream stream)
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throws InvalidMidiDataException, IOException
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{
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Iterator readers = ServiceFactory.lookupProviders(MidiFileReader.class);
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while (readers.hasNext())
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{
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MidiFileReader sr = (MidiFileReader) readers.next();
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MidiFileFormat sb = sr.getMidiFileFormat(stream);
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if (sb != null)
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return sb;
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}
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throw new InvalidMidiDataException("Can't read MidiFileFormat from stream");
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}
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/**
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* Read a MidiFileFormat object from the given url.
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*
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* @param url the url from which to read the MidiFileFormat
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* @return the MidiFileFormat object
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* @throws InvalidMidiDataException if we were unable to read the MidiFileFormat
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* @throws IOException if an I/O error happened while reading
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*/
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public static MidiFileFormat getMidiFileFormat(URL url)
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throws InvalidMidiDataException, IOException
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{
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Iterator readers = ServiceFactory.lookupProviders(MidiFileReader.class);
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while (readers.hasNext())
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{
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MidiFileReader sr = (MidiFileReader) readers.next();
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MidiFileFormat sb = sr.getMidiFileFormat(url);
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if (sb != null)
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return sb;
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}
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throw new InvalidMidiDataException("Cannot read from url " + url);
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}
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/**
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* Read a MidiFileFormat object from the given file.
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*
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* @param file the file from which to read the MidiFileFormat
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* @return the MidiFileFormat object
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* @throws InvalidMidiDataException if we were unable to read the MidiFileFormat
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* @throws IOException if an I/O error happened while reading
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*/
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public static MidiFileFormat getMidiFileFormat(File file)
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throws InvalidMidiDataException, IOException
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{
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Iterator readers = ServiceFactory.lookupProviders(MidiFileReader.class);
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while (readers.hasNext())
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{
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MidiFileReader sr = (MidiFileReader) readers.next();
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MidiFileFormat sb = sr.getMidiFileFormat(file);
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if (sb != null)
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return sb;
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}
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throw new InvalidMidiDataException("Can't read MidiFileFormat from file "
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+ file);
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}
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/**
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* Read a Sequence object from the given stream.
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*
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* @param stream the stream from which to read the Sequence
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* @return the Sequence object
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* @throws InvalidMidiDataException if we were unable to read the Sequence
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* @throws IOException if an I/O error happened while reading
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*/
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public static Sequence getSequence(InputStream stream)
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throws InvalidMidiDataException, IOException
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{
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Iterator readers = ServiceFactory.lookupProviders(MidiFileReader.class);
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while (readers.hasNext())
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{
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MidiFileReader sr = (MidiFileReader) readers.next();
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Sequence sq = sr.getSequence(stream);
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if (sq != null)
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return sq;
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}
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throw new InvalidMidiDataException("Can't read Sequence from stream");
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}
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363 |
|
|
|
364 |
|
|
/**
|
365 |
|
|
* Read a Sequence object from the given url.
|
366 |
|
|
*
|
367 |
|
|
* @param url the url from which to read the Sequence
|
368 |
|
|
* @return the Sequence object
|
369 |
|
|
* @throws InvalidMidiDataException if we were unable to read the Sequence
|
370 |
|
|
* @throws IOException if an I/O error happened while reading
|
371 |
|
|
*/
|
372 |
|
|
public static Sequence getSequence(URL url)
|
373 |
|
|
throws InvalidMidiDataException, IOException
|
374 |
|
|
{
|
375 |
|
|
Iterator readers = ServiceFactory.lookupProviders(MidiFileReader.class);
|
376 |
|
|
while (readers.hasNext())
|
377 |
|
|
{
|
378 |
|
|
MidiFileReader sr = (MidiFileReader) readers.next();
|
379 |
|
|
Sequence sq = sr.getSequence(url);
|
380 |
|
|
if (sq != null)
|
381 |
|
|
return sq;
|
382 |
|
|
}
|
383 |
|
|
throw new InvalidMidiDataException("Cannot read from url " + url);
|
384 |
|
|
}
|
385 |
|
|
|
386 |
|
|
/**
|
387 |
|
|
* Read a Sequence object from the given file.
|
388 |
|
|
*
|
389 |
|
|
* @param file the file from which to read the Sequence
|
390 |
|
|
* @return the Sequence object
|
391 |
|
|
* @throws InvalidMidiDataException if we were unable to read the Sequence
|
392 |
|
|
* @throws IOException if an I/O error happened while reading
|
393 |
|
|
*/
|
394 |
|
|
public static Sequence getSequence(File file)
|
395 |
|
|
throws InvalidMidiDataException, IOException
|
396 |
|
|
{
|
397 |
|
|
Iterator readers = ServiceFactory.lookupProviders(MidiFileReader.class);
|
398 |
|
|
while (readers.hasNext())
|
399 |
|
|
{
|
400 |
|
|
MidiFileReader sr = (MidiFileReader) readers.next();
|
401 |
|
|
Sequence sq = sr.getSequence(file);
|
402 |
|
|
if (sq != null)
|
403 |
|
|
return sq;
|
404 |
|
|
}
|
405 |
|
|
throw new InvalidMidiDataException("Can't read Sequence from file "
|
406 |
|
|
+ file);
|
407 |
|
|
}
|
408 |
|
|
|
409 |
|
|
/**
|
410 |
|
|
* Return an array of supported MIDI file types on this system.
|
411 |
|
|
*
|
412 |
|
|
* @return the array of supported MIDI file types
|
413 |
|
|
*/
|
414 |
|
|
public static int[] getMidiFileTypes()
|
415 |
|
|
{
|
416 |
|
|
// We only support a max of 3 MIDI file types.
|
417 |
|
|
boolean supported[] = new boolean[3];
|
418 |
|
|
// The number of supported formats.
|
419 |
|
|
int count = 0;
|
420 |
|
|
Iterator writers = ServiceFactory.lookupProviders(MidiFileWriter.class);
|
421 |
|
|
while (writers.hasNext())
|
422 |
|
|
{
|
423 |
|
|
MidiFileWriter fw = (MidiFileWriter) writers.next();
|
424 |
|
|
int types[] = fw.getMidiFileTypes();
|
425 |
|
|
for (int i = types.length; i > 0;)
|
426 |
|
|
{
|
427 |
|
|
int type = types[--i];
|
428 |
|
|
if (supported[type] == false)
|
429 |
|
|
{
|
430 |
|
|
count++;
|
431 |
|
|
supported[type] = true;
|
432 |
|
|
}
|
433 |
|
|
}
|
434 |
|
|
}
|
435 |
|
|
int result[] = new int[count];
|
436 |
|
|
for (int i = supported.length; i > 0;)
|
437 |
|
|
{
|
438 |
|
|
if (supported[--i])
|
439 |
|
|
result[--count] = i;
|
440 |
|
|
}
|
441 |
|
|
return result;
|
442 |
|
|
}
|
443 |
|
|
|
444 |
|
|
/**
|
445 |
|
|
* Return true if the system supports writing files of type fileType.
|
446 |
|
|
*
|
447 |
|
|
* @param fileType the MIDI file type we want to write
|
448 |
|
|
* @return true if we can write fileType files, false otherwise
|
449 |
|
|
*/
|
450 |
|
|
public static boolean isFileTypeSupported(int fileType)
|
451 |
|
|
{
|
452 |
|
|
Iterator writers = ServiceFactory.lookupProviders(MidiFileWriter.class);
|
453 |
|
|
while (writers.hasNext())
|
454 |
|
|
{
|
455 |
|
|
MidiFileWriter fw = (MidiFileWriter) writers.next();
|
456 |
|
|
|
457 |
|
|
if (fw.isFileTypeSupported(fileType))
|
458 |
|
|
return true;
|
459 |
|
|
}
|
460 |
|
|
return false;
|
461 |
|
|
}
|
462 |
|
|
|
463 |
|
|
/**
|
464 |
|
|
* Return an array of supported MIDI file types on this system
|
465 |
|
|
* for the given sequnce.
|
466 |
|
|
*
|
467 |
|
|
* @param sequence the sequnce to write
|
468 |
|
|
* @return the array of supported MIDI file types
|
469 |
|
|
*/
|
470 |
|
|
public static int[] getMidiFileTypes(Sequence sequence)
|
471 |
|
|
{
|
472 |
|
|
// We only support a max of 3 MIDI file types.
|
473 |
|
|
boolean supported[] = new boolean[3];
|
474 |
|
|
// The number of supported formats.
|
475 |
|
|
int count = 0;
|
476 |
|
|
Iterator writers = ServiceFactory.lookupProviders(MidiFileWriter.class);
|
477 |
|
|
while (writers.hasNext())
|
478 |
|
|
{
|
479 |
|
|
MidiFileWriter fw = (MidiFileWriter) writers.next();
|
480 |
|
|
int types[] = fw.getMidiFileTypes(sequence);
|
481 |
|
|
for (int i = types.length; i > 0;)
|
482 |
|
|
{
|
483 |
|
|
int type = types[--i];
|
484 |
|
|
if (supported[type] == false)
|
485 |
|
|
{
|
486 |
|
|
count++;
|
487 |
|
|
supported[type] = true;
|
488 |
|
|
}
|
489 |
|
|
}
|
490 |
|
|
}
|
491 |
|
|
int result[] = new int[count];
|
492 |
|
|
for (int i = supported.length; i > 0;)
|
493 |
|
|
{
|
494 |
|
|
if (supported[--i])
|
495 |
|
|
result[--count] = i;
|
496 |
|
|
}
|
497 |
|
|
return result;
|
498 |
|
|
}
|
499 |
|
|
|
500 |
|
|
/**
|
501 |
|
|
* Return true if the system supports writing files of type fileType
|
502 |
|
|
* for the given sequence.
|
503 |
|
|
*
|
504 |
|
|
* @param fileType the MIDI file type we want to write
|
505 |
|
|
* @param sequence the Sequence we want to write
|
506 |
|
|
* @return true if we can write fileType files for sequence, false otherwise
|
507 |
|
|
*/
|
508 |
|
|
public static boolean isFileTypeSupported(int fileType, Sequence sequence)
|
509 |
|
|
{
|
510 |
|
|
Iterator writers = ServiceFactory.lookupProviders(MidiFileWriter.class);
|
511 |
|
|
while (writers.hasNext())
|
512 |
|
|
{
|
513 |
|
|
MidiFileWriter fw = (MidiFileWriter) writers.next();
|
514 |
|
|
|
515 |
|
|
if (fw.isFileTypeSupported(fileType, sequence))
|
516 |
|
|
return true;
|
517 |
|
|
}
|
518 |
|
|
return false;
|
519 |
|
|
}
|
520 |
|
|
|
521 |
|
|
/**
|
522 |
|
|
* Write a sequence to an output stream using a specific MIDI file format.
|
523 |
|
|
*
|
524 |
|
|
* @param in the sequence to write
|
525 |
|
|
* @param fileType the MIDI file format to use
|
526 |
|
|
* @param out the output stream to write to
|
527 |
|
|
* @return the number of bytes written
|
528 |
|
|
* @throws IOException if an I/O exception happens
|
529 |
|
|
* @throws IllegalArgumentException if fileType is not supported for in
|
530 |
|
|
*/
|
531 |
|
|
public static int write(Sequence in, int fileType, OutputStream out)
|
532 |
|
|
throws IOException
|
533 |
|
|
{
|
534 |
|
|
Iterator writers = ServiceFactory.lookupProviders(MidiFileWriter.class);
|
535 |
|
|
while (writers.hasNext())
|
536 |
|
|
{
|
537 |
|
|
MidiFileWriter fw = (MidiFileWriter) writers.next();
|
538 |
|
|
|
539 |
|
|
if (fw.isFileTypeSupported(fileType, in))
|
540 |
|
|
return fw.write(in, fileType, out);
|
541 |
|
|
}
|
542 |
|
|
throw new IllegalArgumentException("File type "
|
543 |
|
|
+ fileType + " is not supported");
|
544 |
|
|
}
|
545 |
|
|
|
546 |
|
|
/**
|
547 |
|
|
* Write a sequence to a file using a specific MIDI file format.
|
548 |
|
|
*
|
549 |
|
|
* @param in the sequence to write
|
550 |
|
|
* @param fileType the MIDI file format to use
|
551 |
|
|
* @param out the file to write to
|
552 |
|
|
* @return the number of bytes written
|
553 |
|
|
* @throws IOException if an I/O exception happens
|
554 |
|
|
* @throws IllegalArgumentException if fileType is not supported for in
|
555 |
|
|
*/
|
556 |
|
|
public static int write(Sequence in, int fileType, File out)
|
557 |
|
|
throws IOException
|
558 |
|
|
{
|
559 |
|
|
Iterator writers = ServiceFactory.lookupProviders(MidiFileWriter.class);
|
560 |
|
|
while (writers.hasNext())
|
561 |
|
|
{
|
562 |
|
|
MidiFileWriter fw = (MidiFileWriter) writers.next();
|
563 |
|
|
|
564 |
|
|
if (fw.isFileTypeSupported(fileType, in))
|
565 |
|
|
return fw.write(in, fileType, out);
|
566 |
|
|
}
|
567 |
|
|
throw new IllegalArgumentException("File type "
|
568 |
|
|
+ fileType + " is not supported");
|
569 |
|
|
}
|
570 |
|
|
}
|