JDK 11 java.desktop.jmod - Desktop Module
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⏎ javax/sound/midi/Synthesizer.java
/*
* Copyright (c) 1999, 2017, Oracle and/or its affiliates. All rights reserved.
* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
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package javax.sound.midi;
/**
* A {@code Synthesizer} generates sound. This usually happens when one of the
* {@code Synthesizer}'s {@link MidiChannel} objects receives a
* {@link MidiChannel#noteOn(int, int) noteOn} message, either directly or via
* the {@code Synthesizer} object. Many {@code Synthesizer}s support
* {@code Receivers}, through which MIDI events can be delivered to the
* {@code Synthesizer}. In such cases, the {@code Synthesizer} typically
* responds by sending a corresponding message to the appropriate
* {@code MidiChannel}, or by processing the event itself if the event isn't one
* of the MIDI channel messages.
* <p>
* The {@code Synthesizer} interface includes methods for loading and unloading
* instruments from soundbanks. An instrument is a specification for
* synthesizing a certain type of sound, whether that sound emulates a
* traditional instrument or is some kind of sound effect or other imaginary
* sound. A soundbank is a collection of instruments, organized by bank and
* program number (via the instrument's {@code Patch} object). Different
* {@code Synthesizer} classes might implement different sound-synthesis
* techniques, meaning that some instruments and not others might be compatible
* with a given synthesizer. Also, synthesizers may have a limited amount of
* memory for instruments, meaning that not every soundbank and instrument can
* be used by every synthesizer, even if the synthesis technique is compatible.
* To see whether the instruments from a certain soundbank can be played by a
* given synthesizer, invoke the
* {@link #isSoundbankSupported(Soundbank) isSoundbankSupported} method of
* {@code Synthesizer}.
* <p>
* "Loading" an instrument means that that instrument becomes available for
* synthesizing notes. The instrument is loaded into the bank and program
* location specified by its {@code Patch} object. Loading does not necessarily
* mean that subsequently played notes will immediately have the sound of this
* newly loaded instrument. For the instrument to play notes, one of the
* synthesizer's {@code MidiChannel} objects must receive (or have received) a
* program-change message that causes that particular instrument's bank and
* program number to be selected.
*
* @author Kara Kytle
* @see MidiSystem#getSynthesizer
* @see Soundbank
* @see Instrument
* @see MidiChannel#programChange(int, int)
* @see Receiver
* @see Transmitter
* @see MidiDevice
*/
public interface Synthesizer extends MidiDevice {
// SYNTHESIZER METHODS
/**
* Obtains the maximum number of notes that this synthesizer can sound
* simultaneously.
*
* @return the maximum number of simultaneous notes
* @see #getVoiceStatus
*/
int getMaxPolyphony();
/**
* Obtains the processing latency incurred by this synthesizer, expressed in
* microseconds. This latency measures the worst-case delay between the time
* a MIDI message is delivered to the synthesizer and the time that the
* synthesizer actually produces the corresponding result.
* <p>
* Although the latency is expressed in microseconds, a synthesizer's actual
* measured delay may vary over a wider range than this resolution suggests.
* For example, a synthesizer might have a worst-case delay of a few
* milliseconds or more.
*
* @return the worst-case delay, in microseconds
*/
long getLatency();
/**
* Obtains the set of MIDI channels controlled by this synthesizer. Each
* non-null element in the returned array is a {@code MidiChannel} that
* receives the MIDI messages sent on that channel number.
* <p>
* The MIDI 1.0 specification provides for 16 channels, so this method
* returns an array of at least 16 elements. However, if this synthesizer
* doesn't make use of all 16 channels, some of the elements of the array
* might be {@code null}, so you should check each element before using it.
*
* @return an array of the {@code MidiChannel} objects managed by this
* {@code Synthesizer}. Some of the array elements may be
* {@code null}.
*/
MidiChannel[] getChannels();
/**
* Obtains the current status of the voices produced by this synthesizer. If
* this class of {@code Synthesizer} does not provide voice information, the
* returned array will always be of length 0. Otherwise, its length is
* always equal to the total number of voices, as returned by
* {@code getMaxPolyphony()}. (See the {@code VoiceStatus} class description
* for an explanation of synthesizer voices.)
*
* @return an array of {@code VoiceStatus} objects that supply information
* about the corresponding synthesizer voices
* @see #getMaxPolyphony
* @see VoiceStatus
*/
VoiceStatus[] getVoiceStatus();
/**
* Informs the caller whether this synthesizer is capable of loading
* instruments from the specified soundbank. If the soundbank is
* unsupported, any attempts to load instruments from it will result in an
* {@code IllegalArgumentException}.
*
* @param soundbank soundbank for which support is queried
* @return {@code true} if the soundbank is supported, otherwise
* {@code false}
* @see #loadInstruments
* @see #loadAllInstruments
* @see #unloadInstruments
* @see #unloadAllInstruments
* @see #getDefaultSoundbank
*/
boolean isSoundbankSupported(Soundbank soundbank);
/**
* Makes a particular instrument available for synthesis. This instrument is
* loaded into the patch location specified by its {@code Patch} object, so
* that if a program-change message is received (or has been received) that
* causes that patch to be selected, subsequent notes will be played using
* the sound of {@code instrument}. If the specified instrument is already
* loaded, this method does nothing and returns {@code true}.
* <p>
* The instrument must be part of a soundbank that this {@code Synthesizer}
* supports. (To make sure, you can use the {@code getSoundbank} method of
* {@code Instrument} and the {@code isSoundbankSupported} method of
* {@code Synthesizer}.)
*
* @param instrument instrument to load
* @return {@code true} if the instrument is successfully loaded (or already
* had been), {@code false} if the instrument could not be loaded
* (for example, if the synthesizer has insufficient memory to load
* it)
* @throws IllegalArgumentException if this {@code Synthesizer} doesn't
* support the specified instrument's soundbank
* @see #unloadInstrument
* @see #loadInstruments
* @see #loadAllInstruments
* @see #remapInstrument
* @see SoundbankResource#getSoundbank
* @see MidiChannel#programChange(int, int)
*/
boolean loadInstrument(Instrument instrument);
/**
* Unloads a particular instrument.
*
* @param instrument instrument to unload
* @throws IllegalArgumentException if this {@code Synthesizer} doesn't
* support the specified instrument's soundbank
* @see #loadInstrument
* @see #unloadInstruments
* @see #unloadAllInstruments
* @see #getLoadedInstruments
* @see #remapInstrument
*/
void unloadInstrument(Instrument instrument);
/**
* Remaps an instrument. Instrument {@code to} takes the place of instrument
* {@code from}.
* <br>
* For example, if {@code from} was located at bank number 2, program number
* 11, remapping causes that bank and program location to be occupied
* instead by {@code to}.
* <br>
* If the function succeeds, instrument {@code from} is unloaded.
* <p>
* To cancel the remapping reload instrument {@code from} by invoking one of
* {@link #loadInstrument}, {@link #loadInstruments} or
* {@link #loadAllInstruments}.
*
* @param from the {@code Instrument} object to be replaced
* @param to the {@code Instrument} object to be used in place of the old
* instrument, it should be loaded into the synthesizer
* @return {@code true} if the instrument successfully remapped,
* {@code false} if feature is not implemented by synthesizer
* @throws IllegalArgumentException if instrument {@code from} or instrument
* {@code to} aren't supported by synthesizer or if instrument
* {@code to} is not loaded
* @throws NullPointerException if {@code from} or {@code to} parameters
* have null value
* @see #loadInstrument
* @see #loadInstruments
* @see #loadAllInstruments
*/
boolean remapInstrument(Instrument from, Instrument to);
/**
* Obtains the default soundbank for the synthesizer, if one exists. (Some
* synthesizers provide a default or built-in soundbank.) If a synthesizer
* doesn't have a default soundbank, instruments must be loaded explicitly
* from an external soundbank.
*
* @return default soundbank, or {@code null} if one does not exist
* @see #isSoundbankSupported
*/
Soundbank getDefaultSoundbank();
/**
* Obtains a list of instruments that come with the synthesizer. These
* instruments might be built into the synthesizer, or they might be part of
* a default soundbank provided with the synthesizer, etc.
* <p>
* Note that you don't use this method to find out which instruments are
* currently loaded onto the synthesizer; for that purpose, you use
* {@code getLoadedInstruments()}. Nor does the method indicate all the
* instruments that can be loaded onto the synthesizer; it only indicates
* the subset that come with the synthesizer. To learn whether another
* instrument can be loaded, you can invoke {@code isSoundbankSupported()},
* and if the instrument's {@code Soundbank} is supported, you can try
* loading the instrument.
*
* @return list of available instruments. If the synthesizer has no
* instruments coming with it, an array of length 0 is returned.
* @see #getLoadedInstruments
* @see #isSoundbankSupported(Soundbank)
* @see #loadInstrument
*/
Instrument[] getAvailableInstruments();
/**
* Obtains a list of the instruments that are currently loaded onto this
* {@code Synthesizer}.
*
* @return a list of currently loaded instruments
* @see #loadInstrument
* @see #getAvailableInstruments
* @see Soundbank#getInstruments
*/
Instrument[] getLoadedInstruments();
/**
* Loads onto the {@code Synthesizer} all instruments contained in the
* specified {@code Soundbank}.
*
* @param soundbank the {@code Soundbank} whose are instruments are to be
* loaded
* @return {@code true} if the instruments are all successfully loaded (or
* already had been), {@code false} if any instrument could not be
* loaded (for example, if the {@code Synthesizer} had insufficient
* memory)
* @throws IllegalArgumentException if the requested soundbank is
* incompatible with this synthesizer
* @see #isSoundbankSupported
* @see #loadInstrument
* @see #loadInstruments
*/
boolean loadAllInstruments(Soundbank soundbank);
/**
* Unloads all instruments contained in the specified {@code Soundbank}.
*
* @param soundbank soundbank containing instruments to unload
* @throws IllegalArgumentException thrown if the soundbank is not supported
* @see #isSoundbankSupported
* @see #unloadInstrument
* @see #unloadInstruments
*/
void unloadAllInstruments(Soundbank soundbank);
/**
* Loads the instruments referenced by the specified patches, from the
* specified {@code Soundbank}. Each of the {@code Patch} objects indicates
* a bank and program number; the {@code Instrument} that has the matching
* {@code Patch} is loaded into that bank and program location.
*
* @param soundbank the {@code Soundbank} containing the instruments to
* load
* @param patchList list of patches for which instruments should be loaded
* @return {@code true} if the instruments are all successfully loaded (or
* already had been), {@code false} if any instrument could not be
* loaded (for example, if the {@code Synthesizer} had insufficient
* memory)
* @throws IllegalArgumentException thrown if the soundbank is not supported
* @see #isSoundbankSupported
* @see Instrument#getPatch
* @see #loadAllInstruments
* @see #loadInstrument
* @see Soundbank#getInstrument(Patch)
* @see Sequence#getPatchList()
*/
boolean loadInstruments(Soundbank soundbank, Patch[] patchList);
/**
* Unloads the instruments referenced by the specified patches, from the
* MIDI sound bank specified.
*
* @param soundbank soundbank containing instruments to unload
* @param patchList list of patches for which instruments should be
* unloaded
* @throws IllegalArgumentException thrown if the soundbank is not supported
* @see #unloadInstrument
* @see #unloadAllInstruments
* @see #isSoundbankSupported
* @see Instrument#getPatch
* @see #loadInstruments
*/
void unloadInstruments(Soundbank soundbank, Patch[] patchList);
// RECEIVER METHODS
/**
* Obtains the name of the receiver.
*
* @return receiver name
*/
// abstract String getName();
/**
* Opens the receiver.
*
* @throws MidiUnavailableException if the receiver is cannot be opened,
* usually because the MIDI device is in use by another application
* @throws SecurityException if the receiver cannot be opened due to
* security restrictions
*/
// abstract void open() throws MidiUnavailableException, SecurityException;
/**
* Closes the receiver.
*/
// abstract void close();
/**
* Sends a MIDI event to the receiver.
*
* @param event event to send
* @throws IllegalStateException if the receiver is not open
*/
// void send(MidiEvent event) throws IllegalStateException {
//
// }
/**
* Obtains the set of controls supported by the element. If no controls are
* supported, returns an array of length 0.
*
* @return set of controls
*/
// $$kk: 03.04.99: josh bloch recommends getting rid of this:
// what can you really do with a set of untyped controls??
// $$kk: 03.05.99: i am putting this back in. for one thing,
// you can check the length and know whether you should keep
// looking....
// Control[] getControls();
/**
* Obtains the specified control.
*
* @param controlClass class of the requested control
* @return requested control object, or null if the control is not supported
*/
// Control getControl(Class controlClass);
}
⏎ javax/sound/midi/Synthesizer.java
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⇒ JDK 11 java.instrument.jmod - Instrument Module
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