flash - AS3-声音提取到bytearray-进度处理程序

Question

我正在使用以下内容从声音对象中提取声音数据，并将其存储在字节数组中。

我要求在前进之前将整个mp3加载到字节数组中，以下为此可以正常工作，但是在提取数据时flash会暂时挂起(2.4mb mp3)

有什么方法可以阻止它挂起吗，即使用事件监听器检查提取过程的进度？

iniSound();

function iniSound()
{
    playLoadedSound(mp3);
}

function playLoadedSound(s:Sound):void
{
    var bytes:ByteArray = new ByteArray();
    s.extract(bytes, int(s.length * 44.1));
    playSound(bytes);
}

function playSound(bytes:ByteArray)
{
    //stop();
    dynamicSound = new Sound();
    dynamicSound.addEventListener(SampleDataEvent.SAMPLE_DATA, onSampleData);

    loadedMP3Samples = bytes;
    numSamples = bytes.length / 8;

    phase = 0;
}

Answer 1

这种方式通常对我有用

function playLoadedSound (s:Sound) : void
{
    var bytes:ByteArray = new ByteArray ();
    s.extract (bytes, int (s.length * 44.1));
    playSound (s);
}

function playSound (bytes:ByteArray) : void
{
    loadedMp3Samples = bytes;
    loadedMp3Samples.position = 0; // reset position

    dynamicSound = new Sound ();
    dynamicSound.addEventListener (SampleDataEvent.SAMPLE_DATA, onSampleData);
    dynamicSound.play ();
}

function onSampleData (event:SampleDataEvent) : void
{
    for (var i:int ; i < 8192 && loadedMp3Samples.available > 0 ; i++)
    {
        var left:Number = loadedMp3Samples.readFloat ();
        var right:Number = loadedMp3Samples.readFloat ();
        event.data.writeFloat (left);
        event.data.writeFloat (right);
    }
}