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/* |
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* Copyright (c) 2017-2019 Rafael da Silva Rocha. |
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* |
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* Permission is hereby granted, free of charge, to any person obtaining |
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* a copy of this software and associated documentation files (the |
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* "Software"), to deal in the Software without restriction, including |
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* without limitation the rights to use, copy, modify, merge, publish, |
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* distribute, sublicense, and/or sell copies of the Software, and to |
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* permit persons to whom the Software is furnished to do so, subject to |
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* the following conditions: |
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* |
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* The above copyright notice and this permission notice shall be |
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* included in all copies or substantial portions of the Software. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE |
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION |
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION |
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
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* |
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*/ |
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/** |
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* @fileoverview The truncateSamples function. |
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* @see https://github.com/rochars/wavefile |
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*/ |
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/** |
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* Truncate float samples on overflow. |
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* @param {!Array|!TypedArray} samples the samples. |
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*/ |
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export function truncateSamples(samples) { |
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for (let i = 0, len = samples.length; i < len; i++) { |
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if (samples[i] > 1) { |
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samples[i] = 1; |
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} else if (samples[i] < -1) { |
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samples[i] = -1; |
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} |
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} |
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} |
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/** |
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* Truncate int samples on overflow. |
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* @param {!Array|!TypedArray} samples the samples. |
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* @param {number} bits The number of bits used by each sample. |
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*/ |
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export function truncateIntSamples(samples, bits) { |
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let max = bits === 8 ? 255 : Math.pow(2, bits) / 2 - 1; |
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let min = bits === 8 ? 0 : -max - 1; |
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for (let i = 0, len = samples.length; i < len; i++) { |
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samples[i] = Math.round(samples[i]); |
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if (samples[i] > max) { |
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samples[i] = max; |
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} else if (samples[i] < min) { |
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samples[i] = min; |
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} |
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} |
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} |
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rochars /
wavefile
