| /* |
| * Copyright (c) 1999, 2016, Oracle and/or its affiliates. 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. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package javax.sound.midi; |
| |
| import java.util.Vector; |
| |
| /** |
| * A {@code Sequence} is a data structure containing musical information (often |
| * an entire song or composition) that can be played back by a {@link Sequencer} |
| * object. Specifically, the {@code Sequence} contains timing information and |
| * one or more tracks. Each {@link Track track} consists of a series of MIDI |
| * events (such as note-ons, note-offs, program changes, and meta-events). The |
| * sequence's timing information specifies the type of unit that is used to |
| * time-stamp the events in the sequence. |
| * <p> |
| * A {@code Sequence} can be created from a MIDI file by reading the file into |
| * an input stream and invoking one of the {@code getSequence} methods of |
| * {@link MidiSystem}. A sequence can also be built from scratch by adding new |
| * {@code Tracks} to an empty {@code Sequence}, and adding {@link MidiEvent} |
| * objects to these {@code Tracks}. |
| * |
| * @author Kara Kytle |
| * @see Sequencer#setSequence(java.io.InputStream stream) |
| * @see Sequencer#setSequence(Sequence sequence) |
| * @see Track#add(MidiEvent) |
| * @see MidiFileFormat |
| */ |
| public class Sequence { |
| |
| // Timing types |
| |
| /** |
| * The tempo-based timing type, for which the resolution is expressed in |
| * pulses (ticks) per quarter note. |
| * |
| * @see #Sequence(float, int) |
| */ |
| public static final float PPQ = 0.0f; |
| |
| /** |
| * The SMPTE-based timing type with 24 frames per second (resolution is |
| * expressed in ticks per frame). |
| * |
| * @see #Sequence(float, int) |
| */ |
| public static final float SMPTE_24 = 24.0f; |
| |
| /** |
| * The SMPTE-based timing type with 25 frames per second (resolution is |
| * expressed in ticks per frame). |
| * |
| * @see #Sequence(float, int) |
| */ |
| public static final float SMPTE_25 = 25.0f; |
| |
| /** |
| * The SMPTE-based timing type with 29.97 frames per second (resolution is |
| * expressed in ticks per frame). |
| * |
| * @see #Sequence(float, int) |
| */ |
| public static final float SMPTE_30DROP = 29.97f; |
| |
| /** |
| * The SMPTE-based timing type with 30 frames per second (resolution is |
| * expressed in ticks per frame). |
| * |
| * @see #Sequence(float, int) |
| */ |
| public static final float SMPTE_30 = 30.0f; |
| |
| // Variables |
| |
| /** |
| * The timing division type of the sequence. |
| * |
| * @see #PPQ |
| * @see #SMPTE_24 |
| * @see #SMPTE_25 |
| * @see #SMPTE_30DROP |
| * @see #SMPTE_30 |
| * @see #getDivisionType |
| */ |
| protected float divisionType; |
| |
| /** |
| * The timing resolution of the sequence. |
| * |
| * @see #getResolution |
| */ |
| protected int resolution; |
| |
| /** |
| * The MIDI tracks in this sequence. |
| * |
| * @see #getTracks |
| */ |
| protected Vector<Track> tracks = new Vector<>(); |
| |
| /** |
| * Constructs a new MIDI sequence with the specified timing division type |
| * and timing resolution. The division type must be one of the recognized |
| * MIDI timing types. For tempo-based timing, {@code divisionType} is PPQ |
| * (pulses per quarter note) and the resolution is specified in ticks per |
| * beat. For SMTPE timing, {@code divisionType} specifies the number of |
| * frames per second and the resolution is specified in ticks per frame. The |
| * sequence will contain no initial tracks. Tracks may be added to or |
| * removed from the sequence using {@link #createTrack} and |
| * {@link #deleteTrack}. |
| * |
| * @param divisionType the timing division type (PPQ or one of the SMPTE |
| * types) |
| * @param resolution the timing resolution |
| * @throws InvalidMidiDataException if {@code divisionType} is not valid |
| * @see #PPQ |
| * @see #SMPTE_24 |
| * @see #SMPTE_25 |
| * @see #SMPTE_30DROP |
| * @see #SMPTE_30 |
| * @see #getDivisionType |
| * @see #getResolution |
| * @see #getTracks |
| */ |
| public Sequence(float divisionType, int resolution) throws InvalidMidiDataException { |
| |
| if (divisionType == PPQ) |
| this.divisionType = PPQ; |
| else if (divisionType == SMPTE_24) |
| this.divisionType = SMPTE_24; |
| else if (divisionType == SMPTE_25) |
| this.divisionType = SMPTE_25; |
| else if (divisionType == SMPTE_30DROP) |
| this.divisionType = SMPTE_30DROP; |
| else if (divisionType == SMPTE_30) |
| this.divisionType = SMPTE_30; |
| else throw new InvalidMidiDataException("Unsupported division type: " + divisionType); |
| |
| this.resolution = resolution; |
| } |
| |
| /** |
| * Constructs a new MIDI sequence with the specified timing division type, |
| * timing resolution, and number of tracks. The division type must be one of |
| * the recognized MIDI timing types. For tempo-based timing, |
| * {@code divisionType} is PPQ (pulses per quarter note) and the resolution |
| * is specified in ticks per beat. For SMTPE timing, {@code divisionType} |
| * specifies the number of frames per second and the resolution is specified |
| * in ticks per frame. The sequence will be initialized with the number of |
| * tracks specified by {@code numTracks}. These tracks are initially empty |
| * (i.e. they contain only the meta-event End of Track). The tracks may be |
| * retrieved for editing using the {@link #getTracks} method. Additional |
| * tracks may be added, or existing tracks removed, using |
| * {@link #createTrack} and {@link #deleteTrack}. |
| * |
| * @param divisionType the timing division type (PPQ or one of the SMPTE |
| * types) |
| * @param resolution the timing resolution |
| * @param numTracks the initial number of tracks in the sequence |
| * @throws InvalidMidiDataException if {@code divisionType} is not valid |
| * @see #PPQ |
| * @see #SMPTE_24 |
| * @see #SMPTE_25 |
| * @see #SMPTE_30DROP |
| * @see #SMPTE_30 |
| * @see #getDivisionType |
| * @see #getResolution |
| */ |
| public Sequence(float divisionType, int resolution, int numTracks) throws InvalidMidiDataException { |
| |
| if (divisionType == PPQ) |
| this.divisionType = PPQ; |
| else if (divisionType == SMPTE_24) |
| this.divisionType = SMPTE_24; |
| else if (divisionType == SMPTE_25) |
| this.divisionType = SMPTE_25; |
| else if (divisionType == SMPTE_30DROP) |
| this.divisionType = SMPTE_30DROP; |
| else if (divisionType == SMPTE_30) |
| this.divisionType = SMPTE_30; |
| else throw new InvalidMidiDataException("Unsupported division type: " + divisionType); |
| |
| this.resolution = resolution; |
| |
| for (int i = 0; i < numTracks; i++) { |
| tracks.addElement(new Track()); |
| } |
| } |
| |
| /** |
| * Obtains the timing division type for this sequence. |
| * |
| * @return the division type (PPQ or one of the SMPTE types) |
| * @see #PPQ |
| * @see #SMPTE_24 |
| * @see #SMPTE_25 |
| * @see #SMPTE_30DROP |
| * @see #SMPTE_30 |
| * @see #Sequence(float, int) |
| * @see MidiFileFormat#getDivisionType() |
| */ |
| public float getDivisionType() { |
| return divisionType; |
| } |
| |
| /** |
| * Obtains the timing resolution for this sequence. If the sequence's |
| * division type is PPQ, the resolution is specified in ticks per beat. For |
| * SMTPE timing, the resolution is specified in ticks per frame. |
| * |
| * @return the number of ticks per beat (PPQ) or per frame (SMPTE) |
| * @see #getDivisionType |
| * @see #Sequence(float, int) |
| * @see MidiFileFormat#getResolution() |
| */ |
| public int getResolution() { |
| return resolution; |
| } |
| |
| /** |
| * Creates a new, initially empty track as part of this sequence. The track |
| * initially contains the meta-event End of Track. The newly created track |
| * is returned. All tracks in the sequence may be retrieved using |
| * {@link #getTracks}. Tracks may be removed from the sequence using |
| * {@link #deleteTrack}. |
| * |
| * @return the newly created track |
| */ |
| public Track createTrack() { |
| |
| Track track = new Track(); |
| tracks.addElement(track); |
| |
| return track; |
| } |
| |
| /** |
| * Removes the specified track from the sequence. |
| * |
| * @param track the track to remove |
| * @return {@code true} if the track existed in the track and was removed, |
| * otherwise {@code false} |
| * @see #createTrack |
| * @see #getTracks |
| */ |
| public boolean deleteTrack(Track track) { |
| return tracks.removeElement(track); |
| } |
| |
| /** |
| * Obtains an array containing all the tracks in this sequence. If the |
| * sequence contains no tracks, an array of length 0 is returned. |
| * |
| * @return the array of tracks |
| * @see #createTrack |
| * @see #deleteTrack |
| */ |
| public Track[] getTracks() { |
| // Creation of the non-empty array will be synchronized inside toArray() |
| return tracks.toArray(new Track[0]); |
| } |
| |
| /** |
| * Obtains the duration of this sequence, expressed in microseconds. |
| * |
| * @return this sequence's duration in microseconds |
| */ |
| public long getMicrosecondLength() { |
| |
| return com.sun.media.sound.MidiUtils.tick2microsecond(this, getTickLength(), null); |
| } |
| |
| /** |
| * Obtains the duration of this sequence, expressed in MIDI ticks. |
| * |
| * @return this sequence's length in ticks |
| * @see #getMicrosecondLength |
| */ |
| public long getTickLength() { |
| |
| long length = 0; |
| |
| synchronized(tracks) { |
| |
| for(int i=0; i<tracks.size(); i++ ) { |
| long temp = tracks.elementAt(i).ticks(); |
| if( temp>length ) { |
| length = temp; |
| } |
| } |
| return length; |
| } |
| } |
| |
| /** |
| * Obtains a list of patches referenced in this sequence. This patch list |
| * may be used to load the required {@link Instrument} objects into a |
| * {@link Synthesizer}. |
| * |
| * @return an array of {@link Patch} objects used in this sequence |
| * @see Synthesizer#loadInstruments(Soundbank, Patch[]) |
| */ |
| public Patch[] getPatchList() { |
| |
| // $$kk: 04.09.99: need to implement!! |
| return new Patch[0]; |
| } |
| } |
