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/**
* @file buffer.js
* @module buffer
*/
import { createTimeRange } from './time.js';
/** @import { TimeRange } from './time' */
/**
* Compute the percentage of the media that has been buffered.
*
* @param {TimeRange} buffered
* The current `TimeRanges` object representing buffered time ranges
*
* @param {number} duration
* Total duration of the media
*
* @return {number}
* Percent buffered of the total duration in decimal form.
*/
export function bufferedPercent(buffered, duration) {
let bufferedDuration = 0;
let start;
let end;
if (!duration) {
return 0;
}
if (!buffered || !buffered.length) {
buffered = createTimeRange(0, 0);
}
for (let i = 0; i < buffered.length; i++) {
start = buffered.start(i);
end = buffered.end(i);
// buffered end can be bigger than duration by a very small fraction
if (end > duration) {
end = duration;
}
bufferedDuration += end - start;
}
return bufferedDuration / duration;
}
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