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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,35 +1,54 @@ | ||
| import "babel-polyfill"; | ||
| import { ConverterType, create } from "../dist/libsamplerate"; | ||
| import 'babel-polyfill'; | ||
| import { ConverterType, create } from '../dist/libsamplerate'; | ||
|
|
||
| let converterType = ConverterType.SRC_SINC_BEST_QUALITY; | ||
| let nChannels = 2; | ||
| let inputSampleRate = 48000; | ||
| let outputSampleRate = 96000; | ||
|
|
||
| test("resamples data successfully in node", () => { | ||
| return create(nChannels, inputSampleRate, outputSampleRate, { | ||
| converterType: converterType, // default SRC_SINC_FASTEST. see API for more | ||
| }).then((src) => { | ||
| let data = new Float32Array(48000); | ||
| let resampledData = src.simple(data); | ||
| src.destroy(); // clean up | ||
| test('resamples data successfully in node', () => { | ||
| return create(nChannels, inputSampleRate, outputSampleRate, { | ||
| converterType: converterType, // default SRC_SINC_FASTEST. see API for more | ||
| }).then((src) => { | ||
| let data = new Float32Array(48000); | ||
| let resampledData = src.simple(data); | ||
| src.destroy(); // clean up | ||
|
|
||
| expect(resampledData.length).toBe(96000); | ||
| }) | ||
| expect(resampledData.length).toBe(96000); | ||
| }); | ||
| }); | ||
|
|
||
| test('return correct num samples with 96k then 192000k outputs', () => { | ||
| return create(nChannels, inputSampleRate, outputSampleRate, { | ||
| converterType: converterType | ||
| }).then((src) => { | ||
| let data = new Float32Array(48000); | ||
| let resampledData = src.simple(data); | ||
| expect(resampledData.length).toBe(96000); | ||
| return create(nChannels, inputSampleRate, outputSampleRate, { | ||
| converterType: converterType, | ||
| }).then((src) => { | ||
| let data = new Float32Array(48000); | ||
| let resampledData = src.simple(data); | ||
| expect(resampledData.length).toBe(96000); | ||
|
|
||
| src.outputSampleRate = 192000; | ||
| src.outputSampleRate = 192000; | ||
|
|
||
| let secondResampled = src.simple(data); | ||
| let secondResampled = src.simple(data); | ||
|
|
||
| expect(secondResampled.length).toBe(192000); | ||
| }); | ||
| expect(secondResampled.length).toBe(192000); | ||
| }); | ||
| }); | ||
|
|
||
| test('correctly resamples edge case of output samples < 4mb, input samples > 4mb', () => { | ||
| const inSr = 96000; | ||
| const outSr = 48000; | ||
| const nChan = 1; | ||
|
|
||
| return create(nChan, inSr, outSr, { | ||
| converterType: converterType, | ||
| }).then((src) => { | ||
| // calculate # elements for oa 7mb piece of "audio" | ||
| const sizeInBytes = 7 * 1024 * 1024; // 7 MB | ||
| const elementSizeInBytes = 4; // Size of a float32 element in bytes | ||
| const numberOfElements = sizeInBytes / elementSizeInBytes; | ||
|
|
||
| let data = new Float32Array(numberOfElements); | ||
| let resampledData = src.simple(data); | ||
| expect(resampledData.length).toBe(917361); // arbitrary, but that's the algo | ||
| }); | ||
| }); |
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