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package javax.sound.sampled.spi;

import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;

import javax.sound.sampled.AudioFileFormat;
import javax.sound.sampled.AudioInputStream;
import javax.sound.sampled.UnsupportedAudioFileException;


Provider for audio file reading services. Classes providing concrete
implementations can parse the format information from one or more types of
audio file, and can produce audio input streams from files of these types.

Author:Kara Kytle
Since:1.3
/**
 * Provider for audio file reading services. Classes providing concrete
 * implementations can parse the format information from one or more types of
 * audio file, and can produce audio input streams from files of these types.
 *
 * @author Kara Kytle
 * @since 1.3
 */
public abstract class AudioFileReader {

    
Obtains the audio file format of the input stream provided. The stream must point to valid audio file data. In general, audio file readers may need to read some data from the stream before determining whether they support it. These parsers must be able to mark the stream, read enough data to determine whether they support the stream, and reset the stream's read pointer to its original position. If the input stream does not support this, this method may fail with an IOException. 
Params:
  • stream – the input stream from which file format information should
        be extracted
Throws:
See Also:
Returns:an AudioFileFormat object describing the audio file format
/**
     * Obtains the audio file format of the input stream provided. The stream
     * must point to valid audio file data. In general, audio file readers may
     * need to read some data from the stream before determining whether they
     * support it. These parsers must be able to mark the stream, read enough
     * data to determine whether they support the stream, and reset the stream's
     * read pointer to its original position. If the input stream does not
     * support this, this method may fail with an {@code IOException}.
     *
     * @param  stream the input stream from which file format information should
     *         be extracted
     * @return an {@code AudioFileFormat} object describing the audio file
     *         format
     * @throws UnsupportedAudioFileException if the stream does not point to
     *         valid audio file data recognized by the system
     * @throws IOException if an I/O exception occurs
     * @throws NullPointerException if {@code stream} is {@code null}
     * @see InputStream#markSupported
     * @see InputStream#mark
     */
    public abstract AudioFileFormat getAudioFileFormat(InputStream stream)
            throws UnsupportedAudioFileException, IOException;

    
Obtains the audio file format of the URL provided. The URL must point to valid audio file data. 
Params:
  • url – the URL from which file format information should be extracted
Throws:
Returns:an AudioFileFormat object describing the audio file format
/**
     * Obtains the audio file format of the {@code URL} provided. The
     * {@code URL} must point to valid audio file data.
     *
     * @param  url the {@code URL} from which file format information should be
     *         extracted
     * @return an {@code AudioFileFormat} object describing the audio file
     *         format
     * @throws UnsupportedAudioFileException if the {@code URL} does not point
     *         to valid audio file data recognized by the system
     * @throws IOException if an I/O exception occurs
     * @throws NullPointerException if {@code url} is {@code null}
     */
    public abstract AudioFileFormat getAudioFileFormat(URL url)
            throws UnsupportedAudioFileException, IOException;

    
Obtains the audio file format of the File provided. The File must point to valid audio file data. 
Params:
  • file – the File from which file format information should be extracted
Throws:
Returns:an AudioFileFormat object describing the audio file format
/**
     * Obtains the audio file format of the {@code File} provided. The
     * {@code File} must point to valid audio file data.
     *
     * @param  file the {@code File} from which file format information should
     *         be extracted
     * @return an {@code AudioFileFormat} object describing the audio file
     *         format
     * @throws UnsupportedAudioFileException if the {@code File} does not point
     *         to valid audio file data recognized by the system
     * @throws IOException if an I/O exception occurs
     * @throws NullPointerException if {@code file} is {@code null}
     */
    public abstract AudioFileFormat getAudioFileFormat(File file)
            throws UnsupportedAudioFileException, IOException;

    
Obtains an audio input stream from the input stream provided. The stream must point to valid audio file data. In general, audio file readers may need to read some data from the stream before determining whether they support it. These parsers must be able to mark the stream, read enough data to determine whether they support the stream, and reset the stream's read pointer to its original position. If the input stream does not support this, this method may fail with an IOException. 
Params:
  • stream – the input stream from which the AudioInputStream should be constructed
Throws:
See Also:
Returns:an AudioInputStream object based on the audio file data contained in the input stream
/**
     * Obtains an audio input stream from the input stream provided. The stream
     * must point to valid audio file data. In general, audio file readers may
     * need to read some data from the stream before determining whether they
     * support it. These parsers must be able to mark the stream, read enough
     * data to determine whether they support the stream, and reset the stream's
     * read pointer to its original position. If the input stream does not
     * support this, this method may fail with an {@code IOException}.
     *
     * @param  stream the input stream from which the {@code AudioInputStream}
     *         should be constructed
     * @return an {@code AudioInputStream} object based on the audio file data
     *         contained in the input stream
     * @throws UnsupportedAudioFileException if the stream does not point to
     *         valid audio file data recognized by the system
     * @throws IOException if an I/O exception occurs
     * @throws NullPointerException if {@code stream} is {@code null}
     * @see InputStream#markSupported
     * @see InputStream#mark
     */
    public abstract AudioInputStream getAudioInputStream(InputStream stream)
            throws UnsupportedAudioFileException, IOException;

    
Obtains an audio input stream from the URL provided. The URL must point to valid audio file data. 
Params:
  • url – the URL for which the AudioInputStream should be constructed
Throws:
Returns:an AudioInputStream object based on the audio file data pointed to by the URL
/**
     * Obtains an audio input stream from the {@code URL} provided. The
     * {@code URL} must point to valid audio file data.
     *
     * @param  url the {@code URL} for which the {@code AudioInputStream} should
     *         be constructed
     * @return an {@code AudioInputStream} object based on the audio file data
     *         pointed to by the {@code URL}
     * @throws UnsupportedAudioFileException if the {@code URL} does not point
     *         to valid audio file data recognized by the system
     * @throws IOException if an I/O exception occurs
     * @throws NullPointerException if {@code url} is {@code null}
     */
    public abstract AudioInputStream getAudioInputStream(URL url)
            throws UnsupportedAudioFileException, IOException;

    
Obtains an audio input stream from the File provided. The File must point to valid audio file data. 
Params:
  • file – the File for which the AudioInputStream should be constructed
Throws:
Returns:an AudioInputStream object based on the audio file data pointed to by the File
/**
     * Obtains an audio input stream from the {@code File} provided. The
     * {@code File} must point to valid audio file data.
     *
     * @param  file the {@code File} for which the {@code AudioInputStream}
     *         should be constructed
     * @return an {@code AudioInputStream} object based on the audio file data
     *         pointed to by the File
     * @throws UnsupportedAudioFileException if the {@code File} does not point
     *         to valid audio file data recognized by the system
     * @throws IOException if an I/O exception occurs
     * @throws NullPointerException if {@code file} is {@code null}
     */
    public abstract AudioInputStream getAudioInputStream(File file)
            throws UnsupportedAudioFileException, IOException;
}