javax.sound.midi.SoundbankResource Maven / Gradle / Ivy
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package javax.sound.midi;
import javax.sound.sampled.AudioInputStream;
/**
* A SoundbankResource represents any audio resource stored
* in a {@link Soundbank}. Common soundbank resources include:
*
* - Instruments. An instrument may be specified in a variety of
* ways. However, all soundbanks have some mechanism for defining
* instruments. In doing so, they may reference other resources
* stored in the soundbank. Each instrument has a
Patch
* which specifies the MIDI program and bank by which it may be
* referenced in MIDI messages. Instrument information may be
* stored in {@link Instrument} objects.
* - Audio samples. A sample typically is a sampled audio waveform
* which contains a short sound recording whose duration is a fraction of
* a second, or at most a few seconds. These audio samples may be
* used by a
{@link Synthesizer} to synthesize sound in response to MIDI
* commands, or extracted for use by an application.
* (The terminology reflects musicians' use of the word "sample" to refer
* collectively to a series of contiguous audio samples or frames, rather than
* to a single, instantaneous sample.)
* The data class for an audio sample will be an object
* that encapsulates the audio sample data itself and information
* about how to interpret it (the format of the audio data), such
* as an {@link AudioInputStream}.
* - Embedded sequences. A sound bank may contain built-in
* song data stored in a data object such as a
{@link Sequence}.
*
*
* Synthesizers that use wavetable synthesis or related
* techniques play back the audio in a sample when
* synthesizing notes, often when emulating the real-world instrument that
* was originally recorded. However, there is not necessarily a one-to-one
* correspondence between the Instruments and samples
* in a Soundbank. A single Instrument can use
* multiple SoundbankResources (typically for notes of dissimilar pitch or
* brightness). Also, more than one Instrument can use the same
* sample.
*
* @author Kara Kytle
*/
public abstract class SoundbankResource {
/**
* The sound bank that contains the SoundbankResources
*/
private final Soundbank soundBank;
/**
* The name of the SoundbankResource
*/
private final String name;
/**
* The class used to represent the sample's data.
*/
private final Class dataClass;
/**
* The wavetable index.
*/
//private final int index;
/**
* Constructs a new SoundbankResource from the given sound bank
* and wavetable index. (Setting the SoundbankResource's name,
* sampled audio data, and instruments is a subclass responsibility.)
* @param soundBank the sound bank containing this SoundbankResource
* @param name the name of the sample
* @param dataClass the class used to represent the sample's data
*
* @see #getSoundbank
* @see #getName
* @see #getDataClass
* @see #getData
*/
protected SoundbankResource(Soundbank soundBank, String name, Class dataClass) {
this.soundBank = soundBank;
this.name = name;
this.dataClass = dataClass;
}
/**
* Obtains the sound bank that contains this SoundbankResource.
* @return the sound bank in which this SoundbankResource is stored
*/
public Soundbank getSoundbank() {
return soundBank;
}
/**
* Obtains the name of the resource. This should generally be a string
* descriptive of the resource.
* @return the instrument's name
*/
public String getName() {
return name;
}
/**
* Obtains the class used by this sample to represent its data.
* The object returned by getData will be of this
* class. If this SoundbankResource object does not support
* direct access to its data, returns null.
* @return the class used to represent the sample's data, or
* null if the data is not accessible
*/
public Class getDataClass() {
return dataClass;
}
/**
* Obtains the sampled audio that is stored in this SoundbankResource.
* The type of object returned depends on the implementation of the
* concrete class, and may be queried using getDataClass.
* @return an object containing the sampled audio data
* @see #getDataClass
*/
public abstract Object getData();
/**
* Obtains the index of this SoundbankResource into the
* Soundbank's set of SoundbankResources.
* @return the wavetable index
*/
//public int getIndex() {
// return index;
//}
/**
* Obtains a list of the instruments in the sound bank that use the
* SoundbankResource for sound synthesis.
* @return an array of Instruments that reference this
* SoundbankResource
*
* @see Instrument#getSamples
*/
//public abstract Instrument[] getInstruments();
}