Question

我在node.js服务器中使用此代码动态创建Wav文件：

Wav.prototype.getWavInt16Array = function(buffer){

var intBuffer = new Int16Array(buffer.length + 23), tmp;

intBuffer[0] = 0x4952; // "RI"
intBuffer[1] = 0x4646; // "FF"

intBuffer[2] = (2*buffer.length + 15) & 0x0000ffff; // RIFF size
intBuffer[3] = ((2*buffer.length + 15) & 0xffff0000) >> 16; // RIFF size

intBuffer[4] = 0x4157; // "WA"
intBuffer[5] = 0x4556; // "VE"

intBuffer[6] = 0x6d66; // "fm"
intBuffer[7] = 0x2074; // "t "

intBuffer[8] = 0x0012; // fmt chunksize: 18
intBuffer[9] = 0x0000; //

intBuffer[10] = 0x0001; // format tag : 1 
intBuffer[11] = this._channels; // channels: 2

intBuffer[12] = this._sampleRate & 0x0000ffff; // sample per sec
intBuffer[13] = (this._sampleRate & 0xffff0000) >> 16; // sample per sec

intBuffer[14] = (2*this._channels*this._sampleRate) & 0x0000ffff; // byte per sec
intBuffer[15] = ((2*this._channels*this._sampleRate) & 0xffff0000) >> 16; // byte per sec

intBuffer[16] = 0x0004; // block align
intBuffer[17] = 0x0010; // bit per sample
intBuffer[18] = 0x0000; // cb size
intBuffer[19] = 0x6164; // "da"
intBuffer[20] = 0x6174; // "ta"
intBuffer[21] = (2*buffer.length) & 0x0000ffff; // data size[byte]
intBuffer[22] = ((2*buffer.length) & 0xffff0000) >> 16; // data size[byte]  

for (var i = 0; i < buffer.length; i++) {
    tmp = buffer[i];
    if (tmp >= 1) {
        intBuffer[i+23] = (1 << 15) - 1;
    }
    else if (tmp <= -1) {
        intBuffer[i+23] = -(1 << 15);
    }
    else {
        intBuffer[i+23] = Math.round(tmp * (1 << 15));
    }
}

return intBuffer;
};

我如何将此wav发送给客户端？我可以创建到wav的url链接并发送只是网址吗？但我不想在服务器上创建任何wav文件。

套接字IO。创建Wav并发送回复。

0 个答案: