Question

我想将两个mp3文件混合成一个音频文件（我想将一个音频强加给另一个不连接的音频）我搜索了第三个库但我找不到。你能帮我找一个图书馆吗？

我使用了这段代码，但我没有听到任何声音？另外，如何将这个新文件保存到设备？

代码如下：

private void mixSound() throws IOException 
{
    AudioTrack audioTrack = new AudioTrack(AudioManager.STREAM_MUSIC, 44100, AudioFormat.CHANNEL_OUT_STEREO, AudioFormat.ENCODING_PCM_16BIT, 44100, AudioTrack.MODE_STREAM);
    InputStream in1=getResources().openRawResource(R.raw.naweha);
    InputStream in2=getResources().openRawResource(R.raw.youmat2belna);
    byte[] music1 = null;
    music1= new byte[in1.available()];
    music1=convertStreamToByteArray(in1);
    in1.close();
    InputStream str;

    byte[] music2 = null;
    music2= new byte[in2.available()];
    music2=convertStreamToByteArray(in2);
    in2.close();
    byte[] output = new byte[music1.length];
    audioTrack.play();

    for(int i=0; i < output.length; i++)
    {
        float samplef1 = music1[i] / 128.0f;      //     2^7=128
        float samplef2 = music2[i] / 128.0f;
        float mixed = samplef1 + samplef2;
        // reduce the volume a bit:
        mixed *= 0.8;
        // hard clipping
        if (mixed > 1.0f) mixed = 1.0f;
        if (mixed < -1.0f) mixed = -1.0f;
        byte outputSample = (byte)(mixed * 128.0f);
        output[i] = outputSample;
    }   //for loop
    audioTrack.write(output, 0, output.length);
    audioTrack.play();
}

public static byte[] convertStreamToByteArray(InputStream is) throws IOException 
{
    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    byte[] buff = new byte[10240];
    int i = Integer.MAX_VALUE;
    while ((i = is.read(buff, 0, buff.length)) > 0) 
    {
        baos.write(buff, 0, i);
    }
    return baos.toByteArray(); // be sure to close InputStream in calling function
}

Android如何将两个音频文件混合到一个音频文件？

0 个答案: