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package javax.sound.sampled;


Ports are simple lines for input or output of audio to or from audio devices. Common examples of ports that act as source lines (mixer inputs) include the microphone, line input, and CD-ROM drive. Ports that act as target lines (mixer outputs) include the speaker, headphone, and line output. You can access port using a Info object. 
Author:Kara Kytle
Since:1.3
/**
 * Ports are simple lines for input or output of audio to or from audio devices.
 * Common examples of ports that act as source lines (mixer inputs) include the
 * microphone, line input, and CD-ROM drive. Ports that act as target lines
 * (mixer outputs) include the speaker, headphone, and line output. You can
 * access port using a {@link Port.Info} object.
 *
 * @author Kara Kytle
 * @since 1.3
 */
public interface Port extends Line {

    
The Port.Info class extends Line.Info with additional information specific to ports, including the port's name and whether it is a source or a target for its mixer. By definition, a port acts as either a source or a target to its mixer, but not both. (Audio input ports are sources; audio output ports are targets.) 
 To learn what ports are available, you can retrieve port info objects through the getSourceLineInfo and getTargetLineInfo methods of the Mixer interface. Instances of the Port.Info class may also be constructed and used to obtain lines matching the parameters specified in the Port.Info object. 
Author:Kara Kytle
Since:1.3
/**
     * The {@code Port.Info} class extends {@code Line.Info} with additional
     * information specific to ports, including the port's name and whether it
     * is a source or a target for its mixer. By definition, a port acts as
     * either a source or a target to its mixer, but not both. (Audio input
     * ports are sources; audio output ports are targets.)
     * <p>
     * To learn what ports are available, you can retrieve port info objects
     * through the {@link Mixer#getSourceLineInfo getSourceLineInfo} and
     * {@link Mixer#getTargetLineInfo getTargetLineInfo} methods of the
     * {@code Mixer} interface. Instances of the {@code Port.Info} class may
     * also be constructed and used to obtain lines matching the parameters
     * specified in the {@code Port.Info} object.
     *
     * @author Kara Kytle
     * @since 1.3
     */
    class Info extends Line.Info {

        // AUDIO PORT TYPE DEFINES

        // SOURCE PORTS

        
A type of port that gets audio from a built-in microphone or a
microphone jack.

/**
         * A type of port that gets audio from a built-in microphone or a
         * microphone jack.
         */
        public static final Info MICROPHONE = new Info(Port.class,"MICROPHONE", true);

        
A type of port that gets audio from a line-level audio input jack.

/**
         * A type of port that gets audio from a line-level audio input jack.
         */
        public static final Info LINE_IN = new Info(Port.class,"LINE_IN", true);

        
A type of port that gets audio from a CD-ROM drive.

/**
         * A type of port that gets audio from a CD-ROM drive.
         */
        public static final Info COMPACT_DISC = new Info(Port.class,"COMPACT_DISC", true);

        // TARGET PORTS

        
A type of port that sends audio to a built-in speaker or a speaker
jack.

/**
         * A type of port that sends audio to a built-in speaker or a speaker
         * jack.
         */
        public static final Info SPEAKER = new Info(Port.class,"SPEAKER", false);

        
A type of port that sends audio to a headphone jack.

/**
         * A type of port that sends audio to a headphone jack.
         */
        public static final Info HEADPHONE = new Info(Port.class,"HEADPHONE", false);

        
A type of port that sends audio to a line-level audio output jack.

/**
         * A type of port that sends audio to a line-level audio output jack.
         */
        public static final Info LINE_OUT = new Info(Port.class,"LINE_OUT", false);

        // FUTURE DIRECTIONS...

        // telephone
        // DAT
        // DVD

        
The string that names the port.

/**
         * The string that names the port.
         */
        private final String name;

        
Whether this port is source or not.

/**
         * Whether this port is source or not.
         */
        private final boolean isSource;

        
Constructs a port's info object from the information given. This
constructor is typically used by an implementation of Java Sound to
describe a supported line.

Params:
  • lineClass – the class of the port described by the info object
  • name – the string that names the port
  • isSource – true if the port is a source port (such as a microphone), false if the port is a target port (such as a speaker)
/**
         * Constructs a port's info object from the information given. This
         * constructor is typically used by an implementation of Java Sound to
         * describe a supported line.
         *
         * @param  lineClass the class of the port described by the info object
         * @param  name the string that names the port
         * @param  isSource {@code true} if the port is a source port (such as a
         *         microphone), {@code false} if the port is a target port (such
         *         as a speaker)
         */
        public Info(Class<?> lineClass, String name, boolean isSource) {

            super(lineClass);
            this.name = name;
            this.isSource = isSource;
        }

        
Obtains the name of the port.

Returns:the string that names the port
/**
         * Obtains the name of the port.
         *
         * @return the string that names the port
         */
        public String getName() {
            return name;
        }

        
Indicates whether the port is a source or a target for its mixer.

Returns:true if the port is a source port (such as a microphone), false if the port is a target port (such as a speaker)
/**
         * Indicates whether the port is a source or a target for its mixer.
         *
         * @return {@code true} if the port is a source port (such as a
         *         microphone), {@code false} if the port is a target port (such
         *         as a speaker)
         */
        public boolean isSource() {
            return isSource;
        }

        
Indicates whether this info object specified matches this one. To
match, the match requirements of the superclass must be met and the
types must be equal.

Params:
  • info – the info object for which the match is queried
Returns:true if the specified object matches this one, false otherwise
/**
         * Indicates whether this info object specified matches this one. To
         * match, the match requirements of the superclass must be met and the
         * types must be equal.
         *
         * @param  info the info object for which the match is queried
         * @return {@code true} if the specified object matches this one,
         *         {@code false} otherwise
         */
        @Override
        public boolean matches(Line.Info info) {

            if (! (super.matches(info)) ) {
                return false;
            }

            if (!(name.equals(((Info)info).getName())) ) {
                return false;
            }

            if (! (isSource == ((Info)info).isSource()) ) {
                return false;
            }

            return true;
        }

        
Indicates whether the specified object is equal to this info object, returning true if the objects are the same. 
Params:
  • obj – the reference object with which to compare
Returns:true if the specified object is equal to this info object; false otherwise
/**
         * Indicates whether the specified object is equal to this info object,
         * returning {@code true} if the objects are the same.
         *
         * @param  obj the reference object with which to compare
         * @return {@code true} if the specified object is equal to this info
         *         object; {@code false} otherwise
         */
        @Override
        public final boolean equals(Object obj) {
            return super.equals(obj);
        }

        
Returns a hash code value for this info object.

Returns:a hash code value for this info object
/**
         * Returns a hash code value for this info object.
         *
         * @return a hash code value for this info object
         */
        @Override
        public final int hashCode() {
            return super.hashCode();
        }

        
Provides a String representation of the port. 
Returns:a string that describes the port
/**
         * Provides a {@code String} representation of the port.
         *
         * @return a string that describes the port
         */
        @Override
        public final String toString() {
            return (name + ((isSource == true) ? " source" : " target") + " port");
        }
    }
}