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truncate float samples on toBitDepth when they overflow.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,64 @@ | ||
| /** | ||
| * WaveFile: https://github.com/rochars/wavefile | ||
| * Copyright (c) 2017-2018 Rafael da Silva Rocha. MIT License. | ||
| * | ||
| * Test the toBitDepth() method to convert an 64-bit file to 8-bit. | ||
| * The 64-bit file have values > 1, so after the conversion the | ||
| * values will cause overflow when packed to 8-bit. WaveFile should | ||
| * truncate the values. | ||
| * | ||
| */ | ||
|
|
||
| const assert = require("assert"); | ||
| const fs = require("fs"); | ||
| const WaveFile = require("../test/loader.js"); | ||
| const path = "test/files/"; | ||
| describe("32-bit IEEE from file to 8-bit", function() { | ||
|
|
||
| let wav = new WaveFile( | ||
| fs.readFileSync(path + "64bit-48kHz-noBext-mono-overflow.wav")); | ||
| wav.data.samples[0] = -1.5; | ||
| wav.toBitDepth("8"); | ||
| fs.writeFileSync( | ||
| path + "/out/to-bit-depth/64-to-8-overflow.wav", wav.toBuffer()); | ||
|
|
||
| it("chunkId should be 'RIFF'", function() { | ||
| assert.equal(wav.container, "RIFF"); | ||
| }); | ||
| it("fmtChunkId should be 'fmt '", function() { | ||
| assert.equal(wav.fmt.chunkId, "fmt "); | ||
| }); | ||
| it("format should be 'WAVE'", function() { | ||
| assert.equal(wav.format, "WAVE"); | ||
| }); | ||
| it("fmtChunkSize should be 16", function() { | ||
| assert.equal(wav.fmt.chunkSize, 16); | ||
| }); | ||
| it("audioFormat should be 1 (PCM)", function() { | ||
| assert.equal(wav.fmt.audioFormat, 1); | ||
| }); | ||
| it("numChannels should be 1", function() { | ||
| assert.equal(wav.fmt.numChannels, 1); | ||
| }); | ||
| it("sampleRate should be 48000", function() { | ||
| assert.equal(wav.fmt.sampleRate, 48000); | ||
| }); | ||
| it("byteRate be 48000", function() { | ||
| assert.equal(wav.fmt.byteRate, 48000); | ||
| }); | ||
| it("blockAlign should be 1", function() { | ||
| assert.equal(wav.fmt.blockAlign, 1); | ||
| }); | ||
| it("bitsPerSample should be 8", function() { | ||
| assert.equal(wav.fmt.bitsPerSample, 8); | ||
| }); | ||
| it("dataChunkId should be 'data'", function() { | ||
| assert.equal(wav.data.chunkId, 'data'); | ||
| }); | ||
| it("dataChunkSize should be > 0", function() { | ||
| assert.ok(wav.data.chunkSize > 0); | ||
| }); | ||
| it("samples.length should be > 0", function() { | ||
| assert.ok(wav.data.samples.length > 0); | ||
| }); | ||
| }); |