Java Length Unlimited AudioInputStream

Question

我有一堆代码，在运行时会产生程序性声音。不幸的是，它只持续几秒钟。理想情况下，它会一直运行，直到我告诉它停止。我不是在谈论循环，生成它的算法目前提供2 ^ 64个样本，所以它在可预见的未来不会用完。 AudioInputStream的构造函数接受第三个输入，理想情况下我可以删除它。我可以提供一个庞大的数字，但这似乎是错误的方法。

我考虑过使用SourceDataLine，但理想情况下算法会按需调用，而不是提前运行并编写路径。想法？

Answer 1

我似乎回答了自己的问题。

经过进一步的研究，使用SourceDataLine是可行的方法，因为它会在你给它足够的时候阻止它。

抱歉缺乏合适的Javadoc。

class SoundPlayer
{
    // plays an InputStream for a given number of samples, length
    public static void play(InputStream stream, float sampleRate, int sampleSize, int length) throws LineUnavailableException
    {
        // you can specify whatever format you want...I just don't need much flexibility here
        AudioFormat format = new AudioFormat(sampleRate, sampleSize, 1, false, true);
        AudioInputStream audioStream = new AudioInputStream(stream, format, length);
        Clip clip = AudioSystem.getClip();
        clip.open(audioStream);
        clip.start();
    }

    public static void play(InputStream stream, float sampleRate, int sampleSize) throws LineUnavailableException
    {
        AudioFormat format = new AudioFormat(sampleRate, sampleSize, 1, false, true);
        SourceDataLine line = AudioSystem.getSourceDataLine(format);
        line.open(format);
        line.start();
        // if you wanted to block, you could just run the loop in here
        SoundThread soundThread = new SoundThread(stream, line);
        soundThread.start();
    }

    private static class SoundThread extends Thread
    {
        private static final int buffersize = 1024;

        private InputStream stream;
        private SourceDataLine line;

        SoundThread(InputStream stream, SourceDataLine line)
        {
            this.stream = stream;
            this.line = line;
        }

        public void run()
        {
            byte[] b = new byte[buffersize];
            // you could, of course, have a way of stopping this...
            for (;;)
            {
                stream.read(b);
                line.write(b, 0, buffersize);
            }
        }
    }
}