127 lines
5.4 KiB
Haxe
127 lines
5.4 KiB
Haxe
package auratests.dsp;
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import utest.Assert;
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import kha.arrays.Float32Array;
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import aura.Aura;
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import aura.dsp.FFTConvolver;
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import aura.types.AudioBuffer;
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import aura.types.Complex;
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import aura.utils.MathUtils;
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import aura.utils.TestSignals;
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@:access(aura.dsp.FFTConvolver)
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class TestFFTConvolver extends utest.Test {
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var audioBuffer: AudioBuffer;
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var fftConvolver: FFTConvolver;
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function setup() {
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audioBuffer = new AudioBuffer(2, FFTConvolver.FFT_SIZE);
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fftConvolver = new FFTConvolver();
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}
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function test_process_noFadeIfTemporalInterpLengthIsZero() {
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fftConvolver.temporalInterpolationLength = 0;
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for (i in 0...audioBuffer.channelLength) {
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audioBuffer.getChannelView(0)[i] = Math.sin(i * 4 * Math.PI / audioBuffer.channelLength);
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audioBuffer.getChannelView(1)[i] = Math.sin(i * 4 * Math.PI / audioBuffer.channelLength);
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}
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setImpulseFreqsToConstant(new Complex(1.0, 0.0));
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fftConvolver.process(audioBuffer);
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discardOverlapForNextProcess();
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for (i in 0...FFTConvolver.FFT_SIZE) {
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Assert.floatEquals(Math.sin(i * 4 * Math.PI / audioBuffer.channelLength), audioBuffer.getChannelView(0)[i]);
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Assert.floatEquals(Math.sin(i * 4 * Math.PI / audioBuffer.channelLength), audioBuffer.getChannelView(1)[i]);
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}
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setImpulseFreqsToConstant(new Complex(0.0, 0.0));
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fftConvolver.process(audioBuffer);
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for (i in 0...FFTConvolver.FFT_SIZE) {
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Assert.floatEquals(0, audioBuffer.getChannelView(0)[i]);
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Assert.floatEquals(0, audioBuffer.getChannelView(1)[i]);
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}
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}
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function test_process_crossfadeIfTemporalInterpLengthIsLargerZero() {
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fftConvolver.temporalInterpolationLength = 20;
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for (i in 0...audioBuffer.channelLength) {
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audioBuffer.getChannelView(0)[i] = Math.sin(i * 4 * Math.PI / audioBuffer.channelLength);
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audioBuffer.getChannelView(1)[i] = Math.sin(i * 4 * Math.PI / audioBuffer.channelLength);
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}
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setImpulseFreqsToConstant(new Complex(1.0, 0.0));
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fftConvolver.process(audioBuffer);
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discardOverlapForNextProcess();
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for (i in 0...FFTConvolver.FFT_SIZE) {
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final t = minF(i, fftConvolver.temporalInterpolationLength) / fftConvolver.temporalInterpolationLength;
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Assert.floatEquals(lerp(0.0, Math.sin(i * 4 * Math.PI / audioBuffer.channelLength), t), audioBuffer.getChannelView(0)[i]);
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Assert.floatEquals(lerp(0.0, Math.sin(i * 4 * Math.PI / audioBuffer.channelLength), t), audioBuffer.getChannelView(1)[i]);
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}
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for (i in 0...audioBuffer.channelLength) {
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audioBuffer.getChannelView(0)[i] = Math.sin(i * 8 * Math.PI / audioBuffer.channelLength);
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audioBuffer.getChannelView(1)[i] = Math.sin(i * 8 * Math.PI / audioBuffer.channelLength);
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}
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setImpulseFreqsToConstant(new Complex(0.0, 0.0));
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fftConvolver.process(audioBuffer);
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for (i in 0...FFTConvolver.FFT_SIZE) {
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final t = minF(i, fftConvolver.temporalInterpolationLength) / fftConvolver.temporalInterpolationLength;
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Assert.floatEquals(lerp(Math.sin(i * 8 * Math.PI / audioBuffer.channelLength), 0.0, t), audioBuffer.getChannelView(0)[i]);
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Assert.floatEquals(lerp(Math.sin(i * 8 * Math.PI / audioBuffer.channelLength), 0.0, t), audioBuffer.getChannelView(1)[i]);
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}
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}
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function test_process_crossfadeEntireChunkSize() {
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fftConvolver.temporalInterpolationLength = -1;
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for (i in 0...audioBuffer.channelLength) {
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audioBuffer.getChannelView(0)[i] = Math.sin(i * 4 * Math.PI / audioBuffer.channelLength);
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audioBuffer.getChannelView(1)[i] = Math.sin(i * 4 * Math.PI / audioBuffer.channelLength);
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}
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setImpulseFreqsToConstant(new Complex(1.0, 0.0));
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fftConvolver.process(audioBuffer);
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discardOverlapForNextProcess();
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for (i in 0...FFTConvolver.FFT_SIZE) {
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final t = minF(i, FFTConvolver.CHUNK_SIZE) / FFTConvolver.CHUNK_SIZE;
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Assert.floatEquals(lerp(0.0, Math.sin(i * 4 * Math.PI / audioBuffer.channelLength), t), audioBuffer.getChannelView(0)[i]);
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Assert.floatEquals(lerp(0.0, Math.sin(i * 4 * Math.PI / audioBuffer.channelLength), t), audioBuffer.getChannelView(1)[i]);
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}
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for (i in 0...audioBuffer.channelLength) {
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audioBuffer.getChannelView(0)[i] = Math.sin(i * 8 * Math.PI / audioBuffer.channelLength);
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audioBuffer.getChannelView(1)[i] = Math.sin(i * 8 * Math.PI / audioBuffer.channelLength);
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}
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setImpulseFreqsToConstant(new Complex(0.0, 0.0));
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fftConvolver.process(audioBuffer);
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for (i in 0...FFTConvolver.FFT_SIZE) {
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final t = minF(i, FFTConvolver.CHUNK_SIZE) / FFTConvolver.CHUNK_SIZE;
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Assert.floatEquals(lerp(Math.sin(i * 8 * Math.PI / audioBuffer.channelLength), 0.0, t), audioBuffer.getChannelView(0)[i]);
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Assert.floatEquals(lerp(Math.sin(i * 8 * Math.PI / audioBuffer.channelLength), 0.0, t), audioBuffer.getChannelView(1)[i]);
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}
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}
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function setImpulseFreqsToConstant(value: Complex) {
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for (i in 0...FFTConvolver.FFT_SIZE) {
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fftConvolver.impulseFFT.getOutput(0 + fftConvolver.currentImpulseAlternationIndex)[i] = value;
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fftConvolver.impulseFFT.getOutput(2 + fftConvolver.currentImpulseAlternationIndex)[i] = value;
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}
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fftConvolver.currentImpulseAlternationIndex = 1 - fftConvolver.currentImpulseAlternationIndex;
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fftConvolver.overlapLength[0] = FFTConvolver.CHUNK_SIZE;
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fftConvolver.overlapLength[1] = FFTConvolver.CHUNK_SIZE;
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fftConvolver.prevImpulseLengths[0] = FFTConvolver.CHUNK_SIZE;
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fftConvolver.prevImpulseLengths[1] = FFTConvolver.CHUNK_SIZE;
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}
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function discardOverlapForNextProcess() {
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for (c in 0...FFTConvolver.NUM_CHANNELS) {
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for (i in 0...fftConvolver.overlapPrev[c].length) {
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fftConvolver.overlapPrev[c][i] = 0.0;
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}
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}
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}
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}
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