Question

我有一个用16位PCM编码的wav文件，我想将它转换为PCM短阵列并使用audiotrack类播放原始数组。这就是我做的：

        String fileName = "test.wav";
        File f = new File(baseDir + File.separator + fileName);
        InputStream is = null;
        try {
            is = new FileInputStream       (f);
        } catch (FileNotFoundException e1) {
            // TODO Auto-generated catch block
            e1.printStackTrace();
        }
            BufferedInputStream     bis = new BufferedInputStream   (is, 8000);
            DataInputStream         dis = new DataInputStream       (bis);      //  Create a DataInputStream to read the audio data from the saved file
            short[] music = new short[(int) f.length()];
            int i = 0;                                                          //  Read the file into the "music" array
            try {
                while (dis.available() > 0)
                {
                    music[i] = dis.readShort();                                      //  This assignment does not reverse the order
                    i++;
                }
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            Log.i("123",""+Arrays.toString(music));

            try {
                dis.close();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }        

            at=new AudioTrack(AudioManager.STREAM_MUSIC, 8000, AudioFormat.CHANNEL_OUT_MONO,
                    AudioFormat.ENCODING_PCM_16BIT, 8000 /* 1 second buffer */,
                    AudioTrack.MODE_STREAM);
            at.write(music, 0, (int)f.length());
            at.play();

可以播放阵列，但问题是当我将它与播放原始wav文件进行比较时，我发现它们没有输出相同的声音。有人可以帮我解决这个问题吗？提前谢谢！

Answer 1

您必须搜索文件中的实际音频数据才能获得音频样本，请参阅http://en.wikipedia.org/wiki/WAV或https://ccrma.stanford.edu/courses/422/projects/WaveFormat/。

16bit mono @ 8khz的一秒将是8000 * 2 * 1字节= 16000字节

从wav文件播放原始PCM字节

1 个答案: