Package Exports

sdl-speaker

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Readme

node-sdl-speaker

Output PCM stream data to speaker with SDL2.(Only Support Mac)

使用SDL2播放PCM数据。主要是用于播放PCM数据流。使用TPCircularBuffer缓存音频数据

Installation

$ npm install sdl-speaker

Example

const Speaker = require('sdl-speaker');
const speaker = new Speaker({
  sampleRate: 16000,
  channels: 1,
  samplesPerFrame: 320
});

// write some buffer;
speaker.write(buffer);

// start play audio;
speaker.open();

API

new Speaker([ option ]) -> instance;

创建一个Speaker实例。option是可选对象，包含如下配置

channels: 声道数. 默认值: 1.
samplesRate: 每个声道的采样率. 默认值: 16000.
samplesPerFrame: 每一帧的采样数. 默认值: 320.

speaker.write(pcmBuffer)

把音频数据写入到缓冲区中。可以在speaker.open()之前执行，提前缓存数据。

speaker.open()

开始播放音频。从缓冲区中读取数据。如果缓冲区的数据小于samplesPerFrame则填充静音。

speaker.close()

关闭播放器。并清空缓冲区。

speaker.pause()

暂停播放器。不清空缓冲区。

speaker.resume()

重启播放器。

speaker.clean()

主动清空缓冲区。