audio-type-detect
Version:
detect audio file type from url
86 lines (55 loc) • 2.06 kB
Markdown
> Detect an audio file type from remote url or ArrayBuffer.
According to the [magic number](<https://en.wikipedia.org/wiki/Magic_number_(programming)>) of a file, we can detect the type of an audio file with or without a file suffix.
```shell
npm install audio-type-detect --save
```
**detect from url**
```js
import getAudioType from 'audio-type-detect'
// an aac audio file without file suffix
const url = 'https://0345-1400187352-1256635546.cos.ap-shanghai.myqcloud.com/rychou/e3801cfc517873a5a5471241e1da1869'
getAudioType(url).then(type => {
console.log(type)
})
// ouput aac
```
**detect from buffer**
```js
import { getAudioTypeFromBuffer } from 'audio-type-detect'
// an aac audio file without file suffix
const url = 'https://0345-1400187352-1256635546.cos.ap-shanghai.myqcloud.com/rychou/e3801cfc517873a5a5471241e1da1869'
const xhr = new XMLHttpRequest();
xhr.open('GET', 'url');
xhr.responseType = 'arraybuffer';
xhr.send();
xhr.onload = () => {
console.log(getAudioTypeFromBuffer(xhr.response));
// output aac
};
```
**getAudioType(url) -> { Promise }**
get audio file type from an url.
Parameters：
| Name | Type | Description |
| ---- | ------ | ------------------- |
| url | String | The audio file url. |
Returns:
return a `Promise` object
- `getAudioType(url).then(type => {}) ` the type( `String` ) of file. if detect failure, it return `false`
- `getAudioType(url).catch(error => {})`
**getAudioTypeFromBuffer(buffer) -> { String }**
get audio file type from an array buffer.
Parameters：
| Name | Type | Description |
| ---- | ------ | ------------------- |
| url | String | The audio file url. |
Returns:
return the type( `String` ) of file. if detect failure, it return `false`
### Supported file type
`mp3`, `flac`, `aac`, `oga`, `wav`, `wma`, `amr`
### Related
- [margic number table](https://www.garykessler.net/library/file_sigs.html)