Dermot Duffy
c02c692f68
- Closes #2556 - Closes #2450 **Key intended features:** - go2rtc compatible - 100% test coverage to significantly improve ability to test, maintain and work around browser weirdnesses (e.g. Safari). - Written from the ground up in the style of the rest of the project. **To use:** - Change `live_provider` from `go2rtc` to `go2rtc-experimental`.
55 lines
2.0 KiB
TypeScript
55 lines
2.0 KiB
TypeScript
import { describe, expect, it } from 'vitest';
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import {
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GOP_SAMPLE_WINDOW_SIZE,
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GOPCadenceEstimator,
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} from '../../../../../../../src/components-lib/live/providers/go2rtc-experimental/utils/live-edge-tracker/gop-cadence-estimator';
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describe('GOPCadenceEstimator', () => {
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it('should return the default GOP before any samples', () => {
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expect(new GOPCadenceEstimator().estimateSeconds()).toBe(1);
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});
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it('should average the interval between buffer advances', () => {
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const estimator = new GOPCadenceEstimator();
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estimator.sample(10, new Date(0));
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estimator.sample(12, new Date(2000));
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estimator.sample(14, new Date(4000));
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expect(estimator.estimateSeconds()).toBe(2);
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});
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it('should ignore updates that do not advance the buffer', () => {
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const estimator = new GOPCadenceEstimator();
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estimator.sample(10, new Date(0));
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estimator.sample(12, new Date(2000));
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// A trim: same buffered end, later time -> not a delivery interval, and it
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// must not reset the last-advance timestamp.
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estimator.sample(12, new Date(5000));
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estimator.sample(14, new Date(6000));
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// Intervals are 2s (0 -> 2000) and 4s (2000 -> 6000) -> average 3s.
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expect(estimator.estimateSeconds()).toBe(3);
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});
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it('should ignore advances with no elapsed time', () => {
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const estimator = new GOPCadenceEstimator();
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estimator.sample(10, new Date(1000));
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estimator.sample(12, new Date(1000));
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expect(estimator.estimateSeconds()).toBe(1);
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});
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it('should evict the oldest sample beyond the window', () => {
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const estimator = new GOPCadenceEstimator();
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// A slow 5s interval, then a full window of 1s intervals evicts it.
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estimator.sample(0, new Date(0));
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estimator.sample(5, new Date(5000));
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let time = 5000;
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let end = 5;
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for (let i = 0; i < GOP_SAMPLE_WINDOW_SIZE; ++i) {
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time += 1000;
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end += 1;
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estimator.sample(end, new Date(time));
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}
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expect(estimator.estimateSeconds()).toBe(1);
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});
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});
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