MpegAudioFileReader.java 文件源码

/**
 * Returns AudioFileFormat from URL.
 */
public AudioFileFormat getAudioFileFormat(URL url)
        throws UnsupportedAudioFileException, IOException
{
    if (TDebug.TraceAudioFileReader)
    {
        TDebug.out("MpegAudioFileReader.getAudioFileFormat(URL): begin");
    }
    long lFileLengthInBytes = AudioSystem.NOT_SPECIFIED;
    URLConnection conn = url.openConnection();
    // Tell shoucast server (if any) that SPI support shoutcast stream.
    conn.setRequestProperty("Icy-Metadata", "1");
    InputStream inputStream = conn.getInputStream();
    AudioFileFormat audioFileFormat = null;
    try
    {
        audioFileFormat = getAudioFileFormat(inputStream, lFileLengthInBytes);
    }
    finally
    {
        inputStream.close();
    }
    if (TDebug.TraceAudioFileReader)
    {
        TDebug.out("MpegAudioFileReader.getAudioFileFormat(URL): end");
    }
    return audioFileFormat;
}