author | ohair |
Wed, 06 Apr 2011 22:06:11 -0700 | |
changeset 9035 | 1255eb81cc2f |
parent 8529 | 041fad0cabfc |
child 18215 | b2afd66ce6db |
permissions | -rw-r--r-- |
2 | 1 |
/* |
9035
1255eb81cc2f
7033660: Update copyright year to 2011 on any files changed in 2011
ohair
parents:
8529
diff
changeset
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* Copyright (c) 1999, 2011, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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package com.sun.media.sound; |
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import java.io.DataInputStream; |
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import java.io.DataOutputStream; |
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import java.io.PipedInputStream; |
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import java.io.PipedOutputStream; |
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import java.io.ByteArrayOutputStream; |
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import java.io.ByteArrayInputStream; |
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import java.io.SequenceInputStream; |
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import java.io.File; |
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import java.io.FileInputStream; |
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import java.io.InputStream; |
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import java.io.IOException; |
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import java.io.EOFException; |
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import java.io.OutputStream; |
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import java.io.RandomAccessFile; |
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import java.io.BufferedInputStream; |
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import java.net.URL; |
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import java.net.MalformedURLException; |
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||
46 |
import javax.sound.midi.MidiFileFormat; |
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import javax.sound.midi.InvalidMidiDataException; |
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import javax.sound.midi.MetaMessage; |
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import javax.sound.midi.MidiEvent; |
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import javax.sound.midi.MidiMessage; |
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import javax.sound.midi.Sequence; |
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import javax.sound.midi.ShortMessage; |
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import javax.sound.midi.SysexMessage; |
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import javax.sound.midi.Track; |
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import javax.sound.midi.spi.MidiFileReader; |
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/** |
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* MIDI file reader. |
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* |
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* @author Kara Kytle |
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* @author Jan Borgersen |
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* @author Florian Bomers |
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*/ |
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public class StandardMidiFileReader extends MidiFileReader { |
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private static final int MThd_MAGIC = 0x4d546864; // 'MThd' |
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private static final int MIDI_TYPE_0 = 0; |
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private static final int MIDI_TYPE_1 = 1; |
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private static final int bisBufferSize = 1024; // buffer size in buffered input streams |
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/** |
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* MIDI parser types |
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*/ |
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private static final int types[] = { |
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MIDI_TYPE_0, |
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MIDI_TYPE_1 |
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}; |
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public MidiFileFormat getMidiFileFormat(InputStream stream) throws InvalidMidiDataException, IOException { |
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return getMidiFileFormatFromStream(stream, MidiFileFormat.UNKNOWN_LENGTH, null); |
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} |
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// $$fb 2002-04-17: part of fix for 4635286: MidiSystem.getMidiFileFormat() returns format having invalid length |
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private MidiFileFormat getMidiFileFormatFromStream(InputStream stream, int fileLength, SMFParser smfParser) throws InvalidMidiDataException, IOException { |
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int maxReadLength = 16; |
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int duration = MidiFileFormat.UNKNOWN_LENGTH; |
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DataInputStream dis; |
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if (stream instanceof DataInputStream) { |
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dis = (DataInputStream) stream; |
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} else { |
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dis = new DataInputStream(stream); |
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} |
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if (smfParser == null) { |
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dis.mark(maxReadLength); |
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} else { |
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smfParser.stream = dis; |
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} |
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int type; |
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int numtracks; |
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float divisionType; |
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int resolution; |
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try { |
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int magic = dis.readInt(); |
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if( !(magic == MThd_MAGIC) ) { |
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// not MIDI |
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throw new InvalidMidiDataException("not a valid MIDI file"); |
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} |
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// read header length |
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int bytesRemaining = dis.readInt() - 6; |
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type = dis.readShort(); |
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numtracks = dis.readShort(); |
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int timing = dis.readShort(); |
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// decipher the timing code |
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if (timing > 0) { |
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// tempo based timing. value is ticks per beat. |
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divisionType = Sequence.PPQ; |
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resolution = timing; |
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} else { |
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// SMPTE based timing. first decipher the frame code. |
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int frameCode = -1 * (timing >> 8); |
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switch(frameCode) { |
132 |
case 24: |
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divisionType = Sequence.SMPTE_24; |
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break; |
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case 25: |
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divisionType = Sequence.SMPTE_25; |
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break; |
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case 29: |
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divisionType = Sequence.SMPTE_30DROP; |
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break; |
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case 30: |
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divisionType = Sequence.SMPTE_30; |
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break; |
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default: |
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throw new InvalidMidiDataException("Unknown frame code: " + frameCode); |
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} |
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// now determine the timing resolution in ticks per frame. |
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resolution = timing & 0xFF; |
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} |
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if (smfParser != null) { |
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// remainder of this chunk |
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dis.skip(bytesRemaining); |
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smfParser.tracks = numtracks; |
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} |
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} finally { |
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// if only reading the file format, reset the stream |
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if (smfParser == null) { |
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dis.reset(); |
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} |
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} |
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MidiFileFormat format = new MidiFileFormat(type, divisionType, resolution, fileLength, duration); |
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return format; |
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} |
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public MidiFileFormat getMidiFileFormat(URL url) throws InvalidMidiDataException, IOException { |
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InputStream urlStream = url.openStream(); // throws IOException |
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BufferedInputStream bis = new BufferedInputStream( urlStream, bisBufferSize ); |
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MidiFileFormat fileFormat = null; |
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try { |
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fileFormat = getMidiFileFormat( bis ); // throws InvalidMidiDataException |
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} finally { |
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bis.close(); |
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} |
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return fileFormat; |
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} |
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public MidiFileFormat getMidiFileFormat(File file) throws InvalidMidiDataException, IOException { |
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FileInputStream fis = new FileInputStream(file); // throws IOException |
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BufferedInputStream bis = new BufferedInputStream(fis, bisBufferSize); |
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// $$fb 2002-04-17: part of fix for 4635286: MidiSystem.getMidiFileFormat() returns format having invalid length |
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long length = file.length(); |
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if (length > Integer.MAX_VALUE) { |
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length = MidiFileFormat.UNKNOWN_LENGTH; |
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} |
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MidiFileFormat fileFormat = null; |
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try { |
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fileFormat = getMidiFileFormatFromStream(bis, (int) length, null); |
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} finally { |
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bis.close(); |
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} |
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return fileFormat; |
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} |
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public Sequence getSequence(InputStream stream) throws InvalidMidiDataException, IOException { |
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SMFParser smfParser = new SMFParser(); |
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MidiFileFormat format = getMidiFileFormatFromStream(stream, |
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MidiFileFormat.UNKNOWN_LENGTH, |
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smfParser); |
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// must be MIDI Type 0 or Type 1 |
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if ((format.getType() != 0) && (format.getType() != 1)) { |
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throw new InvalidMidiDataException("Invalid or unsupported file type: " + format.getType()); |
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} |
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// construct the sequence object |
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Sequence sequence = new Sequence(format.getDivisionType(), format.getResolution()); |
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// for each track, go to the beginning and read the track events |
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for (int i = 0; i < smfParser.tracks; i++) { |
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if (smfParser.nextTrack()) { |
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smfParser.readTrack(sequence.createTrack()); |
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} else { |
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break; |
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} |
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} |
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return sequence; |
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} |
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public Sequence getSequence(URL url) throws InvalidMidiDataException, IOException { |
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InputStream is = url.openStream(); // throws IOException |
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is = new BufferedInputStream(is, bisBufferSize); |
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Sequence seq = null; |
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try { |
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seq = getSequence(is); |
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} finally { |
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is.close(); |
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} |
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return seq; |
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} |
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public Sequence getSequence(File file) throws InvalidMidiDataException, IOException { |
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InputStream is = new FileInputStream(file); // throws IOException |
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is = new BufferedInputStream(is, bisBufferSize); |
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Sequence seq = null; |
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try { |
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seq = getSequence(is); |
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} finally { |
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is.close(); |
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} |
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return seq; |
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} |
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} |
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250 |
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251 |
//============================================================================================================= |
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252 |
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253 |
/** |
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254 |
* State variables during parsing of a MIDI file |
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255 |
*/ |
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256 |
class SMFParser { |
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257 |
private static final int MTrk_MAGIC = 0x4d54726b; // 'MTrk' |
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258 |
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259 |
// set to true to not allow corrupt MIDI files tombe loaded |
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260 |
private static final boolean STRICT_PARSER = false; |
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261 |
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262 |
private static final boolean DEBUG = false; |
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263 |
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264 |
int tracks; // number of tracks |
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265 |
DataInputStream stream; // the stream to read from |
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266 |
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267 |
private int trackLength = 0; // remaining length in track |
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268 |
private byte[] trackData = null; |
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269 |
private int pos = 0; |
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270 |
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271 |
public SMFParser() { |
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272 |
} |
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273 |
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274 |
private int readUnsigned() throws IOException { |
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275 |
return trackData[pos++] & 0xFF; |
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276 |
} |
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277 |
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278 |
private void read(byte[] data) throws IOException { |
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System.arraycopy(trackData, pos, data, 0, data.length); |
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pos += data.length; |
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} |
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282 |
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283 |
private long readVarInt() throws IOException { |
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284 |
long value = 0; // the variable-lengh int value |
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285 |
int currentByte = 0; |
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286 |
do { |
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287 |
currentByte = trackData[pos++] & 0xFF; |
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288 |
value = (value << 7) + (currentByte & 0x7F); |
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289 |
} while ((currentByte & 0x80) != 0); |
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290 |
return value; |
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291 |
} |
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292 |
||
293 |
private int readIntFromStream() throws IOException { |
|
294 |
try { |
|
295 |
return stream.readInt(); |
|
296 |
} catch (EOFException eof) { |
|
297 |
throw new EOFException("invalid MIDI file"); |
|
298 |
} |
|
299 |
} |
|
300 |
||
301 |
boolean nextTrack() throws IOException, InvalidMidiDataException { |
|
302 |
int magic; |
|
303 |
trackLength = 0; |
|
304 |
do { |
|
305 |
// $$fb 2003-08-20: fix for 4910986: MIDI file parser breaks up on http connection |
|
306 |
if (stream.skipBytes(trackLength) != trackLength) { |
|
307 |
if (!STRICT_PARSER) { |
|
308 |
return false; |
|
309 |
} |
|
310 |
throw new EOFException("invalid MIDI file"); |
|
311 |
} |
|
312 |
magic = readIntFromStream(); |
|
313 |
trackLength = readIntFromStream(); |
|
314 |
} while (magic != MTrk_MAGIC); |
|
315 |
if (!STRICT_PARSER) { |
|
316 |
if (trackLength < 0) { |
|
317 |
return false; |
|
318 |
} |
|
319 |
} |
|
320 |
// now read track in a byte array |
|
321 |
trackData = new byte[trackLength]; |
|
322 |
try { |
|
323 |
// $$fb 2003-08-20: fix for 4910986: MIDI file parser breaks up on http connection |
|
324 |
stream.readFully(trackData); |
|
325 |
} catch (EOFException eof) { |
|
326 |
if (!STRICT_PARSER) { |
|
327 |
return false; |
|
328 |
} |
|
329 |
throw new EOFException("invalid MIDI file"); |
|
330 |
} |
|
331 |
pos = 0; |
|
332 |
return true; |
|
333 |
} |
|
334 |
||
335 |
private boolean trackFinished() { |
|
336 |
return pos >= trackLength; |
|
337 |
} |
|
338 |
||
339 |
void readTrack(Track track) throws IOException, InvalidMidiDataException { |
|
340 |
try { |
|
341 |
// reset current tick to 0 |
|
342 |
long tick = 0; |
|
343 |
||
344 |
// reset current status byte to 0 (invalid value). |
|
345 |
// this should cause us to throw an InvalidMidiDataException if we don't |
|
346 |
// get a valid status byte from the beginning of the track. |
|
347 |
int status = 0; |
|
348 |
boolean endOfTrackFound = false; |
|
349 |
||
350 |
while (!trackFinished() && !endOfTrackFound) { |
|
351 |
MidiMessage message; |
|
352 |
||
353 |
int data1 = -1; // initialize to invalid value |
|
354 |
int data2 = 0; |
|
355 |
||
356 |
// each event has a tick delay and then the event data. |
|
357 |
||
358 |
// first read the delay (a variable-length int) and update our tick value |
|
359 |
tick += readVarInt(); |
|
360 |
||
361 |
// check for new status |
|
362 |
int byteValue = readUnsigned(); |
|
363 |
||
364 |
if (byteValue >= 0x80) { |
|
365 |
status = byteValue; |
|
366 |
} else { |
|
367 |
data1 = byteValue; |
|
368 |
} |
|
369 |
||
370 |
switch (status & 0xF0) { |
|
371 |
case 0x80: |
|
372 |
case 0x90: |
|
373 |
case 0xA0: |
|
374 |
case 0xB0: |
|
375 |
case 0xE0: |
|
376 |
// two data bytes |
|
377 |
if (data1 == -1) { |
|
378 |
data1 = readUnsigned(); |
|
379 |
} |
|
380 |
data2 = readUnsigned(); |
|
381 |
message = new FastShortMessage(status | (data1 << 8) | (data2 << 16)); |
|
382 |
break; |
|
383 |
case 0xC0: |
|
384 |
case 0xD0: |
|
385 |
// one data byte |
|
386 |
if (data1 == -1) { |
|
387 |
data1 = readUnsigned(); |
|
388 |
} |
|
389 |
message = new FastShortMessage(status | (data1 << 8)); |
|
390 |
break; |
|
391 |
case 0xF0: |
|
392 |
// sys-ex or meta |
|
393 |
switch(status) { |
|
394 |
case 0xF0: |
|
395 |
case 0xF7: |
|
396 |
// sys ex |
|
397 |
int sysexLength = (int) readVarInt(); |
|
398 |
byte[] sysexData = new byte[sysexLength]; |
|
399 |
read(sysexData); |
|
400 |
||
401 |
SysexMessage sysexMessage = new SysexMessage(); |
|
402 |
sysexMessage.setMessage(status, sysexData, sysexLength); |
|
403 |
message = sysexMessage; |
|
404 |
break; |
|
405 |
||
406 |
case 0xFF: |
|
407 |
// meta |
|
408 |
int metaType = readUnsigned(); |
|
409 |
int metaLength = (int) readVarInt(); |
|
410 |
||
411 |
byte[] metaData = new byte[metaLength]; |
|
412 |
read(metaData); |
|
413 |
||
414 |
MetaMessage metaMessage = new MetaMessage(); |
|
415 |
metaMessage.setMessage(metaType, metaData, metaLength); |
|
416 |
message = metaMessage; |
|
417 |
if (metaType == 0x2F) { |
|
418 |
// end of track means it! |
|
419 |
endOfTrackFound = true; |
|
420 |
} |
|
421 |
break; |
|
422 |
default: |
|
423 |
throw new InvalidMidiDataException("Invalid status byte: " + status); |
|
424 |
} // switch sys-ex or meta |
|
425 |
break; |
|
426 |
default: |
|
427 |
throw new InvalidMidiDataException("Invalid status byte: " + status); |
|
428 |
} // switch |
|
429 |
track.add(new MidiEvent(message, tick)); |
|
430 |
} // while |
|
431 |
} catch (ArrayIndexOutOfBoundsException e) { |
|
432 |
if (DEBUG) e.printStackTrace(); |
|
433 |
// fix for 4834374 |
|
434 |
throw new EOFException("invalid MIDI file"); |
|
435 |
} |
|
436 |
} |
|
437 |
||
438 |
} |