author | ddehaven |
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changeset 26037 | 508779ce6619 |
parent 26003 | jdk/src/share/classes/javax/sound/midi/Sequence.java@d630c97424bd |
parent 25859 | jdk/src/share/classes/javax/sound/midi/Sequence.java@3317bb8137f4 |
child 38981 | 9521cb19e297 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 1999, 2014, 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 javax.sound.midi; |
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import java.util.Vector; |
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/** |
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* A {@code Sequence} is a data structure containing musical information (often |
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* an entire song or composition) that can be played back by a {@link Sequencer} |
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* object. Specifically, the {@code Sequence} contains timing information and |
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* one or more tracks. Each {@link Track track} consists of a series of MIDI |
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* events (such as note-ons, note-offs, program changes, and meta-events). The |
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* sequence's timing information specifies the type of unit that is used to |
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* time-stamp the events in the sequence. |
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* <p> |
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* A {@code Sequence} can be created from a MIDI file by reading the file into |
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* an input stream and invoking one of the {@code getSequence} methods of |
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* {@link MidiSystem}. A sequence can also be built from scratch by adding new |
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* {@code Tracks} to an empty {@code Sequence}, and adding {@link MidiEvent} |
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* objects to these {@code Tracks}. |
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* |
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* @author Kara Kytle |
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* @see Sequencer#setSequence(java.io.InputStream stream) |
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* @see Sequencer#setSequence(Sequence sequence) |
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* @see Track#add(MidiEvent) |
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* @see MidiFileFormat |
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*/ |
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public class Sequence { |
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// Timing types |
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/** |
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* The tempo-based timing type, for which the resolution is expressed in |
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* pulses (ticks) per quarter note. |
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* |
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* @see #Sequence(float, int) |
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*/ |
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public static final float PPQ = 0.0f; |
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/** |
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* The SMPTE-based timing type with 24 frames per second (resolution is |
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* expressed in ticks per frame). |
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* |
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* @see #Sequence(float, int) |
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*/ |
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public static final float SMPTE_24 = 24.0f; |
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/** |
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* The SMPTE-based timing type with 25 frames per second (resolution is |
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* expressed in ticks per frame). |
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* |
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* @see #Sequence(float, int) |
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*/ |
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public static final float SMPTE_25 = 25.0f; |
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/** |
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* The SMPTE-based timing type with 29.97 frames per second (resolution is |
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* expressed in ticks per frame). |
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* |
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* @see #Sequence(float, int) |
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public static final float SMPTE_30DROP = 29.97f; |
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/** |
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* The SMPTE-based timing type with 30 frames per second (resolution is |
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* expressed in ticks per frame). |
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* |
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* @see #Sequence(float, int) |
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*/ |
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public static final float SMPTE_30 = 30.0f; |
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// Variables |
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/** |
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* The timing division type of the sequence. |
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* |
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* @see #PPQ |
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* @see #SMPTE_24 |
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* @see #SMPTE_25 |
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* @see #SMPTE_30DROP |
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* @see #SMPTE_30 |
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* @see #getDivisionType |
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*/ |
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protected float divisionType; |
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/** |
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* The timing resolution of the sequence. |
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* |
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* @see #getResolution |
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*/ |
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protected int resolution; |
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/** |
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* The MIDI tracks in this sequence. |
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* |
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* @see #getTracks |
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*/ |
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protected Vector<Track> tracks = new Vector<Track>(); |
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/** |
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* Constructs a new MIDI sequence with the specified timing division type |
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* and timing resolution. The division type must be one of the recognized |
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* MIDI timing types. For tempo-based timing, {@code divisionType} is PPQ |
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* (pulses per quarter note) and the resolution is specified in ticks per |
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* beat. For SMTPE timing, {@code divisionType} specifies the number of |
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* frames per second and the resolution is specified in ticks per frame. The |
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* sequence will contain no initial tracks. Tracks may be added to or |
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* removed from the sequence using {@link #createTrack} and |
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* {@link #deleteTrack}. |
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* |
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* @param divisionType the timing division type (PPQ or one of the SMPTE |
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* types) |
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* @param resolution the timing resolution |
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* @throws InvalidMidiDataException if {@code divisionType} is not valid |
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* @see #PPQ |
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* @see #SMPTE_24 |
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* @see #SMPTE_25 |
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* @see #SMPTE_30DROP |
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* @see #SMPTE_30 |
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* @see #getDivisionType |
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* @see #getResolution |
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* @see #getTracks |
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*/ |
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public Sequence(float divisionType, int resolution) throws InvalidMidiDataException { |
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if (divisionType == PPQ) |
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this.divisionType = PPQ; |
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else if (divisionType == SMPTE_24) |
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this.divisionType = SMPTE_24; |
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else if (divisionType == SMPTE_25) |
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this.divisionType = SMPTE_25; |
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else if (divisionType == SMPTE_30DROP) |
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this.divisionType = SMPTE_30DROP; |
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else if (divisionType == SMPTE_30) |
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this.divisionType = SMPTE_30; |
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else throw new InvalidMidiDataException("Unsupported division type: " + divisionType); |
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this.resolution = resolution; |
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} |
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/** |
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* Constructs a new MIDI sequence with the specified timing division type, |
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* timing resolution, and number of tracks. The division type must be one of |
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* the recognized MIDI timing types. For tempo-based timing, |
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* {@code divisionType} is PPQ (pulses per quarter note) and the resolution |
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* is specified in ticks per beat. For SMTPE timing, {@code divisionType} |
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* specifies the number of frames per second and the resolution is specified |
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* in ticks per frame. The sequence will be initialized with the number of |
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* tracks specified by {@code numTracks}. These tracks are initially empty |
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* (i.e. they contain only the meta-event End of Track). The tracks may be |
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* retrieved for editing using the {@link #getTracks} method. Additional |
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* tracks may be added, or existing tracks removed, using |
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* {@link #createTrack} and {@link #deleteTrack}. |
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* |
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* @param divisionType the timing division type (PPQ or one of the SMPTE |
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* types) |
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* @param resolution the timing resolution |
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* @param numTracks the initial number of tracks in the sequence |
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* @throws InvalidMidiDataException if {@code divisionType} is not valid |
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* @see #PPQ |
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* @see #SMPTE_24 |
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* @see #SMPTE_25 |
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* @see #SMPTE_30DROP |
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* @see #SMPTE_30 |
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* @see #getDivisionType |
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* @see #getResolution |
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*/ |
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public Sequence(float divisionType, int resolution, int numTracks) throws InvalidMidiDataException { |
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if (divisionType == PPQ) |
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this.divisionType = PPQ; |
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else if (divisionType == SMPTE_24) |
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this.divisionType = SMPTE_24; |
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else if (divisionType == SMPTE_25) |
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this.divisionType = SMPTE_25; |
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else if (divisionType == SMPTE_30DROP) |
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this.divisionType = SMPTE_30DROP; |
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else if (divisionType == SMPTE_30) |
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this.divisionType = SMPTE_30; |
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else throw new InvalidMidiDataException("Unsupported division type: " + divisionType); |
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this.resolution = resolution; |
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for (int i = 0; i < numTracks; i++) { |
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tracks.addElement(new Track()); |
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} |
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} |
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/** |
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* Obtains the timing division type for this sequence. |
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* |
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* @return the division type (PPQ or one of the SMPTE types) |
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* @see #PPQ |
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* @see #SMPTE_24 |
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* @see #SMPTE_25 |
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* @see #SMPTE_30DROP |
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* @see #SMPTE_30 |
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* @see #Sequence(float, int) |
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* @see MidiFileFormat#getDivisionType() |
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*/ |
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public float getDivisionType() { |
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return divisionType; |
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} |
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/** |
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* Obtains the timing resolution for this sequence. If the sequence's |
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* division type is PPQ, the resolution is specified in ticks per beat. For |
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* SMTPE timing, the resolution is specified in ticks per frame. |
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* |
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* @return the number of ticks per beat (PPQ) or per frame (SMPTE) |
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* @see #getDivisionType |
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* @see #Sequence(float, int) |
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* @see MidiFileFormat#getResolution() |
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*/ |
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public int getResolution() { |
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return resolution; |
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} |
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/** |
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* Creates a new, initially empty track as part of this sequence. The track |
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* initially contains the meta-event End of Track. The newly created track |
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* is returned. All tracks in the sequence may be retrieved using |
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* {@link #getTracks}. Tracks may be removed from the sequence using |
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* {@link #deleteTrack}. |
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* |
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* @return the newly created track |
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*/ |
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public Track createTrack() { |
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Track track = new Track(); |
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tracks.addElement(track); |
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return track; |
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} |
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/** |
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* Removes the specified track from the sequence. |
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* |
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* @param track the track to remove |
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* @return {@code true} if the track existed in the track and was removed, |
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* otherwise {@code false} |
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* @see #createTrack |
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* @see #getTracks |
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*/ |
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public boolean deleteTrack(Track track) { |
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synchronized(tracks) { |
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return tracks.removeElement(track); |
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} |
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} |
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/** |
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* Obtains an array containing all the tracks in this sequence. If the |
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* sequence contains no tracks, an array of length 0 is returned. |
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* |
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* @return the array of tracks |
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* @see #createTrack |
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* @see #deleteTrack |
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*/ |
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public Track[] getTracks() { |
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return tracks.toArray(new Track[tracks.size()]); |
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} |
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/** |
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* Obtains the duration of this sequence, expressed in microseconds. |
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* |
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* @return this sequence's duration in microseconds |
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*/ |
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public long getMicrosecondLength() { |
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return com.sun.media.sound.MidiUtils.tick2microsecond(this, getTickLength(), null); |
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} |
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/** |
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* Obtains the duration of this sequence, expressed in MIDI ticks. |
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* |
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* @return this sequence's length in ticks |
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* @see #getMicrosecondLength |
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*/ |
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public long getTickLength() { |
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long length = 0; |
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synchronized(tracks) { |
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for(int i=0; i<tracks.size(); i++ ) { |
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long temp = tracks.elementAt(i).ticks(); |
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if( temp>length ) { |
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length = temp; |
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} |
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} |
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return length; |
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} |
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} |
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/** |
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* Obtains a list of patches referenced in this sequence. This patch list |
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* may be used to load the required {@link Instrument} objects into a |
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* {@link Synthesizer}. |
2 | 325 |
* |
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* @return an array of {@link Patch} objects used in this sequence |
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* @see Synthesizer#loadInstruments(Soundbank, Patch[]) |
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*/ |
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public Patch[] getPatchList() { |
|
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// $$kk: 04.09.99: need to implement!! |
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return new Patch[0]; |
|
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} |
|
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} |