1 /*
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   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
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  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
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  17  * You should have received a copy of the GNU General Public License version
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  23  * questions.
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  25 
  26 package javax.sound.midi;
  27 
  28 /**
  29  * A {@code Soundbank} contains a set of {@code Instruments} that can be loaded
  30  * into a {@code Synthesizer}. Note that a Java Sound {@code Soundbank} is
  31  * different from a MIDI bank. MIDI permits up to 16383 banks, each containing
  32  * up to 128 instruments (also sometimes called programs, patches, or timbres).
  33  * However, a {@code Soundbank} can contain 16383 times 128 instruments, because
  34  * the instruments within a {@code Soundbank} are indexed by both a MIDI program
  35  * number and a MIDI bank number (via a {@code Patch} object). Thus, a
  36  * {@code Soundbank} can be thought of as a collection of MIDI banks.
  37  * <p>
  38  * {@code Soundbank} includes methods that return {@code String} objects
  39  * containing the sound bank's name, manufacturer, version number, and
  40  * description. The precise content and format of these strings is left to the
  41  * implementor.
  42  * <p>
  43  * Different synthesizers use a variety of synthesis techniques. A common one is
  44  * wavetable synthesis, in which a segment of recorded sound is played back,
  45  * often with looping and pitch change. The Downloadable Sound (DLS) format uses
  46  * segments of recorded sound, as does the Headspace Engine. {@code Soundbanks}
  47  * and {@code Instruments} that are based on wavetable synthesis (or other uses
  48  * of stored sound recordings) should typically implement the
  49  * {@code getResources()} method to provide access to these recorded segments.
  50  * This is optional, however; the method can return an zero-length array if the
  51  * synthesis technique doesn't use sampled sound (FM synthesis and physical
  52  * modeling are examples of such techniques), or if it does but the implementor
  53  * chooses not to make the samples accessible.
  54  *
  55  * @author David Rivas
  56  * @author Kara Kytle
  57  * @see Synthesizer#getDefaultSoundbank
  58  * @see Synthesizer#isSoundbankSupported
  59  * @see Synthesizer#loadInstruments(Soundbank, Patch[])
  60  * @see Patch
  61  * @see Instrument
  62  * @see SoundbankResource
  63  */
  64 public interface Soundbank {
  65 
  66     /**
  67      * Obtains the name of the sound bank.
  68      *
  69      * @return a {@code String} naming the sound bank
  70      */
  71     String getName();
  72 
  73     /**
  74      * Obtains the version string for the sound bank.
  75      *
  76      * @return a {@code String} that indicates the sound bank's version
  77      */
  78     String getVersion();
  79 
  80     /**
  81      * Obtains a {@code string} naming the company that provides the sound bank.
  82      *
  83      * @return the vendor string
  84      */
  85     String getVendor();
  86 
  87     /**
  88      * Obtains a textual description of the sound bank, suitable for display.
  89      *
  90      * @return a {@code String} that describes the sound bank
  91      */
  92     String getDescription();
  93 
  94     /**
  95      * Extracts a list of non-Instrument resources contained in the sound bank.
  96      *
  97      * @return an array of resources, excluding instruments. If the sound bank
  98      *         contains no resources (other than instruments), returns an array
  99      *         of length 0.
 100      */
 101     SoundbankResource[] getResources();
 102 
 103     /**
 104      * Obtains a list of instruments contained in this sound bank.
 105      *
 106      * @return an array of the {@code Instruments} in this {@code SoundBank}. If
 107      *         the sound bank contains no instruments, returns an array of
 108      *         length 0.
 109      * @see Synthesizer#getLoadedInstruments
 110      * @see #getInstrument(Patch)
 111      */
 112     Instrument[] getInstruments();
 113 
 114     /**
 115      * Obtains an {@code Instrument} from the given {@code Patch}.
 116      *
 117      * @param  patch a {@code Patch} object specifying the bank index and
 118      *         program change number
 119      * @return the requested instrument, or {@code null} if the sound bank
 120      *         doesn't contain that instrument
 121      * @see #getInstruments
 122      * @see Synthesizer#loadInstruments(Soundbank, Patch[])
 123      */
 124     Instrument getInstrument(Patch patch);
 125 }