Pcm_player_js NPM

PCMPlayer

A minimalist javascript audio player for PCM streaming data for the browsers.
浏览器端简单的 PCM 数据流播放器,支持监听动态音频数据状态。

How to use?（使用说明）

var player = new PCMPlayer(options);

Available options are:
可配置项如下:

Name	Parameter	Default	Type	Remark
inputCodec	Int8 / Int16 / Int32 / Float32	Int16	string	编码格式
channels		1	number	声道数
sampleRate		8000	number	采样率
flushTime		1000	number	flushing interval of PCM data to be played in milisecond（PCM 数据缓冲多久进行播放）
fftSize		2048	number	a power of 2 between 2^5 and 2^15

Complete example（使用示例）:

Install（安装）

install by CDN or npm

CDN

<script src="https://unpkg.com/pcm_player_js"></script>

ES6

npm i pcm_player_js

// in your js/ts file
import PCMPlayer from "pcm_player_js";

use（使用）

var player = new PCMPlayer({
  inputCodec: "Int16",
  channels: 2,
  sampleRate: 8000,
  flushTime: 2000,
});

// Now feed PCM data into player getting from websocket or ajax whatever the transport you are using.Accept ArrayBuffer or TypedArray
// 接收PCM格式的原始数据，ArrayBuffer 类型或者 TypedArray 类型
player.feed(pcm_data, () => {
  //播放结束
});

Available Methods（方法）

Name	Parameter	Remark
feed	raw PCM data,()=> :viod	playing PCM data and end callback
volume	decimal value 0 to +∞ ()	For controlling volume of the player, default is 1
destroy	-	Destroy the player instance and release the resources
pause	-	pause playing
continue	-	resume playing

Available Attributes（属性）

Name	Remark
audioCtx	current AudioContext
gainNode	AudioContext gainNode
analyserNode	AudioContext AnalyserNode

Available Event（事件）

Name	Parameter	Remark
onstatechange	(node, event, type)	node: AudioContext, event: Event, type: AudioContextState
onended	(node, event)	node: AudioBufferSourceNode, event: Event