65 lines
2.5 KiB
C#
65 lines
2.5 KiB
C#
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using NUnit.Framework;
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using Ryujinx.Audio.Renderer.Dsp;
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using Ryujinx.Audio.Renderer.Parameter;
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using Ryujinx.Audio.Renderer.Server.Upsampler;
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using System;
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using System.Collections.Generic;
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using System.IO;
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using System.Linq;
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using System.Runtime.CompilerServices;
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using System.Text;
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using System.Threading.Tasks;
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namespace Ryujinx.Tests.Audio.Renderer.Dsp
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{
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class UpsamplerTests
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{
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[Test]
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public void TestUpsamplerConsistency()
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{
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UpsamplerBufferState bufferState = new UpsamplerBufferState();
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int inputBlockSize = 160;
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int numInputSamples = 32000;
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int numOutputSamples = 48000;
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float inputSampleRate = numInputSamples;
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float outputSampleRate = numOutputSamples;
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float[] inputBuffer = new float[numInputSamples + 100];
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float[] outputBuffer = new float[numOutputSamples + 100];
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for (int sample = 0; sample < inputBuffer.Length; sample++)
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{
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// 440 hz sine wave with amplitude = 0.5f at input sample rate
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inputBuffer[sample] = MathF.Sin((440 / inputSampleRate) * (float)sample * MathF.PI * 2f) * 0.5f;
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}
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int inputIdx = 0;
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int outputIdx = 0;
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while (inputIdx + inputBlockSize < numInputSamples)
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{
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int outputBufLength = (int)Math.Round((float)(inputIdx + inputBlockSize) * outputSampleRate / inputSampleRate) - outputIdx;
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UpsamplerHelper.Upsample(
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outputBuffer.AsSpan(outputIdx),
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inputBuffer.AsSpan(inputIdx),
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outputBufLength,
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inputBlockSize,
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ref bufferState);
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inputIdx += inputBlockSize;
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outputIdx += outputBufLength;
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}
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float[] expectedOutput = new float[numOutputSamples];
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float sumDifference = 0;
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for (int sample = 0; sample < numOutputSamples; sample++)
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{
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// 440 hz sine wave with amplitude = 0.5f at output sample rate with an offset of 15
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expectedOutput[sample] = MathF.Sin((440 / outputSampleRate) * (float)(sample - 15) * MathF.PI * 2f) * 0.5f;
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sumDifference += Math.Abs(expectedOutput[sample] - outputBuffer[sample]);
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}
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sumDifference = sumDifference / (float)expectedOutput.Length;
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// Expect the output to be 98% similar to the expected resampled sine wave
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Assert.IsTrue(sumDifference < 0.02f);
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}
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}
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}
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