JavaSoundAudioGrabber.java 文件源码

/**
 * Open a line to the Java Sound APIs.
 *
 * @throws Exception
 *             if the Java sound system could not be initialised.
 */
private void openJavaSound() throws Exception {
    // Convert the OpenIMAJ audio format to a Java Sound audio format object
    final javax.sound.sampled.AudioFormat audioFormat = new javax.sound.sampled.AudioFormat(
            (int) (this.getFormat().getSampleRateKHz() * 1000), this
                    .getFormat().getNBits(), this.getFormat()
                    .getNumChannels(), this.getFormat().isSigned(), this
                    .getFormat().isBigEndian());

    System.out.println("Creating Java Sound Line with " + this.getFormat());

    // Create info to create an output data line
    final DataLine.Info info = new DataLine.Info(TargetDataLine.class, audioFormat);

    try {
        // Get the output line to write to using the given
        // sample format we just created.
        this.mLine = (TargetDataLine) AudioSystem.getLine(info);

        // If no exception has been thrown we open the line.
        this.mLine.open(audioFormat);
    } catch (final LineUnavailableException e) {
        throw new Exception("Could not open Java Sound audio line for"
                + " the audio format " + this.getFormat());
    }
}