diff -r 738a091d8c07 -r 4a53d636e2f4 jdk/src/share/classes/com/sun/media/sound/SoftMidiAudioFileReader.java --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/jdk/src/share/classes/com/sun/media/sound/SoftMidiAudioFileReader.java Mon Jan 19 20:11:58 2009 +0300 @@ -0,0 +1,214 @@ +/* + * Copyright 2007 Sun Microsystems, Inc. All Rights Reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. Sun designates this + * particular file as subject to the "Classpath" exception as provided + * by Sun in the LICENSE file that accompanied this code. + * + * This code 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 + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, + * CA 95054 USA or visit www.sun.com if you need additional information or + * have any questions. + */ +package com.sun.media.sound; + +import java.io.File; +import java.io.IOException; +import java.io.InputStream; +import java.net.URL; + +import javax.sound.midi.InvalidMidiDataException; +import javax.sound.midi.MetaMessage; +import javax.sound.midi.MidiEvent; +import javax.sound.midi.MidiMessage; +import javax.sound.midi.MidiSystem; +import javax.sound.midi.MidiUnavailableException; +import javax.sound.midi.Receiver; +import javax.sound.midi.Sequence; +import javax.sound.midi.Track; +import javax.sound.sampled.AudioFileFormat; +import javax.sound.sampled.AudioFormat; +import javax.sound.sampled.AudioInputStream; +import javax.sound.sampled.UnsupportedAudioFileException; +import javax.sound.sampled.AudioFileFormat.Type; +import javax.sound.sampled.spi.AudioFileReader; + +/** + * MIDI File Audio Renderer/Reader + * + * @author Karl Helgason + */ +public class SoftMidiAudioFileReader extends AudioFileReader { + + public static final Type MIDI = new Type("MIDI", "mid"); + private static AudioFormat format = new AudioFormat(44100, 16, 2, true, false); + + public AudioFileFormat getAudioFileFormat(Sequence seq) + throws UnsupportedAudioFileException, IOException { + + long totallen = seq.getMicrosecondLength() / 1000000; + long len = (long) (format.getFrameRate() * (totallen + 4)); + return new AudioFileFormat(MIDI, format, (int) len); + } + + public AudioInputStream getAudioInputStream(Sequence seq) + throws UnsupportedAudioFileException, IOException { + AudioSynthesizer synth = (AudioSynthesizer) new SoftSynthesizer(); + AudioInputStream stream; + Receiver recv; + try { + stream = synth.openStream(format, null); + recv = synth.getReceiver(); + } catch (MidiUnavailableException e) { + throw new IOException(e.toString()); + } + float divtype = seq.getDivisionType(); + Track[] tracks = seq.getTracks(); + int[] trackspos = new int[tracks.length]; + int mpq = 500000; + int seqres = seq.getResolution(); + long lasttick = 0; + long curtime = 0; + while (true) { + MidiEvent selevent = null; + int seltrack = -1; + for (int i = 0; i < tracks.length; i++) { + int trackpos = trackspos[i]; + Track track = tracks[i]; + if (trackpos < track.size()) { + MidiEvent event = track.get(trackpos); + if (selevent == null || event.getTick() < selevent.getTick()) { + selevent = event; + seltrack = i; + } + } + } + if (seltrack == -1) + break; + trackspos[seltrack]++; + long tick = selevent.getTick(); + if (divtype == Sequence.PPQ) + curtime += ((tick - lasttick) * mpq) / seqres; + else + curtime = (long) ((tick * 1000000.0 * divtype) / seqres); + lasttick = tick; + MidiMessage msg = selevent.getMessage(); + if (msg instanceof MetaMessage) { + if (divtype == Sequence.PPQ) { + if (((MetaMessage) msg).getType() == 0x51) { + byte[] data = ((MetaMessage) msg).getData(); + mpq = ((data[0] & 0xff) << 16) + | ((data[1] & 0xff) << 8) | (data[2] & 0xff); + } + } + } else { + recv.send(msg, curtime); + } + } + + long totallen = curtime / 1000000; + long len = (long) (stream.getFormat().getFrameRate() * (totallen + 4)); + stream = new AudioInputStream(stream, stream.getFormat(), len); + return stream; + } + + public AudioInputStream getAudioInputStream(InputStream inputstream) + throws UnsupportedAudioFileException, IOException { + + inputstream.mark(200); + Sequence seq; + try { + seq = MidiSystem.getSequence(inputstream); + } catch (InvalidMidiDataException e) { + inputstream.reset(); + throw new UnsupportedAudioFileException(); + } catch (IOException e) { + inputstream.reset(); + throw new UnsupportedAudioFileException(); + } + return getAudioInputStream(seq); + } + + public AudioFileFormat getAudioFileFormat(URL url) + throws UnsupportedAudioFileException, IOException { + Sequence seq; + try { + seq = MidiSystem.getSequence(url); + } catch (InvalidMidiDataException e) { + throw new UnsupportedAudioFileException(); + } catch (IOException e) { + throw new UnsupportedAudioFileException(); + } + return getAudioFileFormat(seq); + } + + public AudioFileFormat getAudioFileFormat(File file) + throws UnsupportedAudioFileException, IOException { + Sequence seq; + try { + seq = MidiSystem.getSequence(file); + } catch (InvalidMidiDataException e) { + throw new UnsupportedAudioFileException(); + } catch (IOException e) { + throw new UnsupportedAudioFileException(); + } + return getAudioFileFormat(seq); + } + + public AudioInputStream getAudioInputStream(URL url) + throws UnsupportedAudioFileException, IOException { + Sequence seq; + try { + seq = MidiSystem.getSequence(url); + } catch (InvalidMidiDataException e) { + throw new UnsupportedAudioFileException(); + } catch (IOException e) { + throw new UnsupportedAudioFileException(); + } + return getAudioInputStream(seq); + } + + public AudioInputStream getAudioInputStream(File file) + throws UnsupportedAudioFileException, IOException { + if (!file.getName().toLowerCase().endsWith(".mid")) + throw new UnsupportedAudioFileException(); + Sequence seq; + try { + seq = MidiSystem.getSequence(file); + } catch (InvalidMidiDataException e) { + throw new UnsupportedAudioFileException(); + } catch (IOException e) { + throw new UnsupportedAudioFileException(); + } + return getAudioInputStream(seq); + } + + public AudioFileFormat getAudioFileFormat(InputStream inputstream) + throws UnsupportedAudioFileException, IOException { + + inputstream.mark(200); + Sequence seq; + try { + seq = MidiSystem.getSequence(inputstream); + } catch (InvalidMidiDataException e) { + inputstream.reset(); + throw new UnsupportedAudioFileException(); + } catch (IOException e) { + inputstream.reset(); + throw new UnsupportedAudioFileException(); + } + return getAudioFileFormat(seq); + } +}