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package com.sun.media.sound;

import java.util.Map;

import javax.sound.midi.MidiSystem;
import javax.sound.midi.MidiUnavailableException;
import javax.sound.midi.Synthesizer;
import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioInputStream;
import javax.sound.sampled.SourceDataLine;


AudioSynthesizer is a Synthesizer which renders it's output audio into SourceDataLine or AudioInputStream. 
Author:Karl Helgason
See Also:
/**
 * {@code AudioSynthesizer} is a {@code Synthesizer}
 * which renders it's output audio into {@code SourceDataLine}
 * or {@code AudioInputStream}.
 *
 * @see MidiSystem#getSynthesizer
 * @see Synthesizer
 *
 * @author Karl Helgason
 */
public interface AudioSynthesizer extends Synthesizer {

    
Obtains the current format (encoding, sample rate, number of channels,
etc.) of the synthesizer audio data.

If the synthesizer is not open and has never been opened, it returns
the default format.

See Also:
Returns:current audio data format
/**
     * Obtains the current format (encoding, sample rate, number of channels,
     * etc.) of the synthesizer audio data.
     *
     * <p>If the synthesizer is not open and has never been opened, it returns
     * the default format.
     *
     * @return current audio data format
     * @see AudioFormat
     */
    AudioFormat getFormat();

    
Gets information about the possible properties for the synthesizer.

Params:
  • info – a proposed list of tag/value pairs that will be sent on open.
Returns:an array of AudioSynthesizerPropertyInfo objects describing possible properties. This array may be an empty array if no properties are required.
/**
     * Gets information about the possible properties for the synthesizer.
     *
     * @param info a proposed list of tag/value pairs that will be sent on open.
     * @return an array of {@code AudioSynthesizerPropertyInfo} objects
     * describing possible properties. This array may be an empty array if
     * no properties are required.
     */
    AudioSynthesizerPropertyInfo[] getPropertyInfo(Map<String, Object> info);

    
Opens the synthesizer and starts rendering audio into SourceDataLine. 
An application opening a synthesizer explicitly with this call has to close the synthesizer by calling MidiDevice.close. This is necessary to release system resources and allow applications to exit cleanly. 
Note that some synthesizers, once closed, cannot be reopened. Attempts to reopen such a synthesizer will always result in a MidiUnavailableException. 
Params:
  • line – which AudioSynthesizer writes output audio into. If line is null, then line from system default mixer is used.
  • info – a Map<String,Object> object containing properties for additional configuration supported by synthesizer. If info is null then default settings are used.
Throws:
See Also:
/**
     * Opens the synthesizer and starts rendering audio into
     * {@code SourceDataLine}.
     *
     * <p>An application opening a synthesizer explicitly with this call
     * has to close the synthesizer by calling {@link #close}. This is
     * necessary to release system resources and allow applications to
     * exit cleanly.
     *
     * <p>Note that some synthesizers, once closed, cannot be reopened.
     * Attempts to reopen such a synthesizer will always result in
     * a {@code MidiUnavailableException}.
     *
     * @param line which {@code AudioSynthesizer} writes output audio into.
     * If {@code line} is null, then line from system default mixer is used.
     * @param info a {@code Map<String,Object>} object containing
     * properties for additional configuration supported by synthesizer.
     * If {@code info} is null then default settings are used.
     *
     * @throws MidiUnavailableException thrown if the synthesizer cannot be
     * opened due to resource restrictions.
     * @throws SecurityException thrown if the synthesizer cannot be
     * opened due to security restrictions.
     *
     * @see #close
     * @see #isOpen
     */
    void open(SourceDataLine line, Map<String, Object> info)
            throws MidiUnavailableException;

    
Opens the synthesizer and renders audio into returned AudioInputStream. 
An application opening a synthesizer explicitly with this call has to close the synthesizer by calling MidiDevice.close. This is necessary to release system resources and allow applications to exit cleanly. 
Note that some synthesizers, once closed, cannot be reopened. Attempts to reopen such a synthesizer will always result in a MidiUnavailableException. 
Params:
  • targetFormat – specifies the AudioFormat used in returned AudioInputStream.
  • info – a Map<String,Object> object containing properties for additional configuration supported by synthesizer. If info is null then default settings are used.
Throws:
See Also:
/**
     * Opens the synthesizer and renders audio into returned
     * {@code AudioInputStream}.
     *
     * <p>An application opening a synthesizer explicitly with this call
     * has to close the synthesizer by calling {@link #close}. This is
     * necessary to release system resources and allow applications to
     * exit cleanly.
     *
     * <p>Note that some synthesizers, once closed, cannot be reopened.
     * Attempts to reopen such a synthesizer will always result in
     * a {@code MidiUnavailableException}.
     *
     * @param targetFormat specifies the {@code AudioFormat}
     * used in returned {@code AudioInputStream}.
     * @param info a {@code Map<String,Object>} object containing
     * properties for additional configuration supported by synthesizer.
     * If {@code info} is null then default settings are used.
     *
     * @throws MidiUnavailableException thrown if the synthesizer cannot be
     * opened due to resource restrictions.
     * @throws SecurityException thrown if the synthesizer cannot be
     * opened due to security restrictions.
     *
     * @see #close
     * @see #isOpen
     */
    AudioInputStream openStream(AudioFormat targetFormat,
                                Map<String, Object> info)
            throws MidiUnavailableException;
}