Source Code Cross Referenced for PitchControl.java in  » 6.0-JDK-Modules » j2me » javax » microedition » media » control » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » 6.0 JDK Modules » j2me » javax.microedition.media.control 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * 
003:         * Copyright  1990-2007 Sun Microsystems, Inc. All Rights Reserved.
004:         * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
005:         * 
006:         * This program is free software; you can redistribute it and/or
007:         * modify it under the terms of the GNU General Public License version
008:         * 2 only, as published by the Free Software Foundation.
009:         * 
010:         * This program is distributed in the hope that it will be useful, but
011:         * WITHOUT ANY WARRANTY; without even the implied warranty of
012:         * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
013:         * General Public License version 2 for more details (a copy is
014:         * included at /legal/license.txt).
015:         * 
016:         * You should have received a copy of the GNU General Public License
017:         * version 2 along with this work; if not, write to the Free Software
018:         * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
019:         * 02110-1301 USA
020:         * 
021:         * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
022:         * Clara, CA 95054 or visit www.sun.com if you need additional
023:         * information or have any questions.
024:         */
025:
026:        package javax.microedition.media.control;
027:
028:        /**
029:
030:         * PitchControl raises or lowers the playback pitch of audio without
031:         * changing the playback speed.
032:         * <p>
033:         *
034:         * PitchControl can be implemented in Players for MIDI media or
035:         * sampled audio. It is not possible to set audible output to
036:         * an absolute pitch value. This control raises or lowers pitch
037:         * relative to the original.<p>
038:         *
039:         * The pitch change is specified in number of &quot;milli-
040:         * semitones&quot; to raise the pitch. As an example,
041:         * specifying a pitch of 12'000 results in playback one octave
042:         * higher. For MIDI that means that all MIDI notes are raised
043:         * by 12 (semitones). For sampled audio playback, it means doubling the
044:         * frequency of perceived sounds (i.e. a 440Hz sound will become a 880Hz 
045:         * sound.).
046:         * Negative values are used to lower the pitch.
047:         * <p>
048:         * All <code>Players</code> by default support 0, or no pitch change.
049:         * A <code>Player</code> which supports only 0 pitch change
050:         * must not implement <code>PitchControl</code>.
051:         * <p>
052:         *
053:         * PitchControl does not influence playback volume in any way.
054:         *
055:         * @see javax.microedition.media.Player
056:         * @see javax.microedition.media.control.RateControl
057:         * @see javax.microedition.media.control.TempoControl
058:         */
059:
060:        public interface PitchControl extends javax.microedition.media.Control {
061:
062:            /**
063:             * Sets the relative pitch raise.
064:             *
065:             * The pitch change is specified in &quot;milli-
066:             * semitones&quot;, i.e. 1000 times the number of
067:             * semitones to raise the pitch. Negative values
068:             * lower the pitch by the number of milli-semitones.<p>
069:             *
070:             * The <code>setPitch()</code> method returns the actual pitch
071:             * change set by the {@link javax.microedition.media.Player Player}. 
072:             * <code>Players</code>
073:             * should set their pitch raise as close to the requested value
074:             * as possible, but are not required to set it to the exact
075:             * value of any argument other than 0. A <code>Player</code> is
076:             * only guaranteed to set its pitch change exactly to 0.
077:             * If the given pitch raise is less than the value returned by 
078:             * <code>getMinPitch</code>
079:             * or greater than the value returned by <code>getMaxPitch</code>,
080:             * it will be adjusted to the minimum or maximum
081:             * supported pitch raise respectively.
082:             *
083:             * @param millisemitones The number of semi tones to raise the playback pitch.
084:             *        It is specified in &quot;milli-semitones&quot;.
085:             * @return The actual pitch raise set in &quot;milli-semitones&quot;.
086:             * @see #getPitch
087:             */
088:            int setPitch(int millisemitones);
089:
090:            /**
091:             * Gets the current playback pitch raise.
092:             *
093:             * @return the current playback pitch raise in &quot;milli-semitones&quot;.
094:             * @see #setPitch
095:             */
096:            int getPitch();
097:
098:            /**
099:             * Gets the maximum playback pitch raise supported by the <code>Player</code>.
100:             *
101:             * @return the maximum pitch raise in &quot;milli-semitones&quot;.
102:             */
103:            int getMaxPitch();
104:
105:            /**
106:             * Gets the minimum playback pitch raise supported by the <code>Player</code>.
107:             *
108:             * @return the minimum pitch raise in &quot;milli-semitones&quot;.
109:             */
110:            int getMinPitch();
111:
112:        }
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