mirror of
https://github.com/heygen-com/hyperframes.git
synced 2026-11-14 13:27:13 +00:00
Miguel Angel Simon Sierra
472904bd0b
check-capture-reversion.mjs compares cropped, downscaled frames and reports a frame that differs between two matching frames within a window. Continuous motion is not flagged. Adds a unit test and a short section in CONTRIBUTING.
33 lines
1.0 KiB
JavaScript
33 lines
1.0 KiB
JavaScript
import { strict as assert } from "node:assert";
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import { test } from "node:test";
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import { findReversions } from "./check-capture-reversion.mjs";
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const OPTS = { window: 20, change: 1, same: 0.25 };
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const SIZE = 4;
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function frames(...levels) {
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return Buffer.concat(levels.map((v) => Buffer.alloc(SIZE, v)));
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}
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test("a region that returns to an earlier picture is flagged at the changed frame", () => {
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const hits = findReversions(frames(10, 10, 200, 10, 10), SIZE, OPTS);
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assert.deepEqual(
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hits.map((h) => [h.from, h.changed, h.back]),
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[[0, 2, 3]],
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);
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});
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test("a change that stays is not a reversion", () => {
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assert.deepEqual(findReversions(frames(10, 10, 200, 200, 200), SIZE, OPTS), []);
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});
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test("continuous motion never returns to an earlier picture", () => {
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assert.deepEqual(findReversions(frames(10, 30, 50, 70, 90), SIZE, OPTS), []);
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});
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test("a return further away than the window is ignored", () => {
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const far = frames(10, 200, 10);
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assert.deepEqual(findReversions(far, SIZE, { ...OPTS, window: 1 }), []);
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});
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