-
Notifications
You must be signed in to change notification settings - Fork 48
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
Back with lib/truncate-samples to not break tests
- Loading branch information
Showing
6 changed files
with
102 additions
and
66 deletions.
There are no files selected for viewing
Large diffs are not rendered by default.
Oops, something went wrong.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,46 @@ | ||
| /* | ||
| * Copyright (c) 2017-2019 Rafael da Silva Rocha. | ||
| * | ||
| * Permission is hereby granted, free of charge, to any person obtaining | ||
| * a copy of this software and associated documentation files (the | ||
| * "Software"), to deal in the Software without restriction, including | ||
| * without limitation the rights to use, copy, modify, merge, publish, | ||
| * distribute, sublicense, and/or sell copies of the Software, and to | ||
| * permit persons to whom the Software is furnished to do so, subject to | ||
| * the following conditions: | ||
| * | ||
| * The above copyright notice and this permission notice shall be | ||
| * included in all copies or substantial portions of the Software. | ||
| * | ||
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | ||
| * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | ||
| * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | ||
| * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE | ||
| * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION | ||
| * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION | ||
| * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. | ||
| * | ||
| */ | ||
|
|
||
| /** | ||
| * @fileoverview The truncateSamples function. | ||
| * @see https://github.com/rochars/wavefile | ||
| */ | ||
|
|
||
| /** | ||
| * Truncate int samples on overflow. | ||
| * @param {!Array|!TypedArray} samples the samples. | ||
| * @param {number} bits The number of bits used by each sample. | ||
| */ | ||
| export function truncateIntSamples(samples, bits) { | ||
| let max = bits === 8 ? 255 : Math.pow(2, bits) / 2 - 1; | ||
| let min = bits === 8 ? 0 : -max - 1; | ||
| for (let i = 0, len = samples.length; i < len; i++) { | ||
| samples[i] = Math.round(samples[i]); | ||
| if (samples[i] > max) { | ||
| samples[i] = max; | ||
| } else if (samples[i] < min) { | ||
| samples[i] = min; | ||
| } | ||
| } | ||
| } |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,26 @@ | ||
| /** | ||
| * WaveFile: https://github.com/rochars/wavefile | ||
| * Copyright (c) 2017-2020 Rafael da Silva Rocha. MIT License. | ||
| * | ||
| * Test the functions from lib/parsers/truncate-samples.js | ||
| * | ||
| */ | ||
|
|
||
| const assert = require("assert"); | ||
| const truncateIntSamples = require( | ||
| '../../lib/parsers/truncate-samples').truncateIntSamples; | ||
|
|
||
| describe("Truncate int samples", function() { | ||
|
|
||
| it("should truncate 8-bit samples", function() { | ||
| let samples = new Float64Array([-1, 256]); | ||
| truncateIntSamples(samples, 8); | ||
| assert.deepEqual(samples, new Float64Array([0, 255])); | ||
| }); | ||
|
|
||
| it("should truncate 16-bit samples", function() { | ||
| let samples = new Float64Array([-40000, 32777]); | ||
| truncateIntSamples(samples, 16); | ||
| assert.deepEqual(samples, new Float64Array([-32768, 32767])); | ||
| }); | ||
| }); |