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bandreject.js
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const addFilter = require('./utils').addFilter;
const registerFilter = require('./utils').registerFilter;
/**
* Augment FfmpegCommand with the bandreject function.
*
*
* @example
* ffmpeg().bandreject()
* ... // call filter configuration functions
* .build() // end filter configuration
* ...
* .applyFilters() // called once all filters have been configured
*
* @param {FfmpegCommand} ffmpegCommand The fluent-ffmpeg constructor.
* @return {FfmpegCommand} The ffmpegCommand augmented with the bandreject function.
*/
function bandreject(ffmpegCommand) {
registerFilter(ffmpegCommand, 'bandreject', function() {
return new BandrejectFilter(this);
});
return ffmpegCommand;
}
/**
* Class exposing methods to configure the vstack filter in a builder pattern way.
*
* See {@link http://ffmpeg.org/ffmpeg-filters.html#vstack} for a description
* of each configuration option.
*/
class BandrejectFilter {
/**
* @param {FfmpegCommand} ffmpegCommand The fluent-ffmpeg constructor.
*/
constructor (ffmpeg) {
this.ffmpeg = ffmpeg;
BandrejectFilter.prototype.withFrequency = this.frequency;
BandrejectFilter.prototype.withWidth_type = this.width_type;
BandrejectFilter.prototype.withWidth = this.width;
}
/**
* Set the filter’s central frequency. Default is 3000.
*
*
* @param val
*/
frequency(val) {
this._frequency = val;
return this;
}
/**
*
* @param val
*/
width_type(val) {
this._width_type = val;
return this;
}
/**
* Specify the band-width of a filter in width_type units.
*
* @param val
*/
width(val) {
this._width = val;
return this;
}
/**
* Creates this filter configuration and registers it in the ffmpeg instance.
* @return {ffmpegCommand} The ffmpeg instance.
*/
build() {
let opt = {};
if (this._frequency) {
opt['frequency'] = this._frequency;
}
if (this._width_type) {
opt['width_type'] = this._width_type;
}
if (this._width) {
opt['width'] = this._width;
}
addFilter(this.ffmpeg, {
filter: 'bandreject',
options: opt
});
return this.ffmpeg;
}
}
module.exports.bandreject = bandreject;