CUEPlayer

CUETools/CUETools.TestCodecs/SOXResamplerTest.cs

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+using CUETools.DSP.Resampler;
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+using CUETools.Codecs;
+using System;
+
+namespace CUETools.TestCodecs
+{
+    
+    
+    /// <summary>
+    ///This is a test class for SOXResamplerTest and is intended
+    ///to contain all SOXResamplerTest Unit Tests
+    ///</summary>
+	[TestClass()]
+	public class SOXResamplerTest
+	{
+
+
+		private TestContext testContextInstance;
+
+		/// <summary>
+		///Gets or sets the test context which provides
+		///information about and functionality for the current test run.
+		///</summary>
+		public TestContext TestContext
+		{
+			get
+			{
+				return testContextInstance;
+			}
+			set
+			{
+				testContextInstance = value;
+			}
+		}
+
+		#region Additional test attributes
+		// 
+		//You can use the following additional attributes as you write your tests:
+		//
+		//Use ClassInitialize to run code before running the first test in the class
+		//[ClassInitialize()]
+		//public static void MyClassInitialize(TestContext testContext)
+		//{
+		//}
+		//
+		//Use ClassCleanup to run code after all tests in a class have run
+		//[ClassCleanup()]
+		//public static void MyClassCleanup()
+		//{
+		//}
+		//
+		//Use TestInitialize to run code before running each test
+		//[TestInitialize()]
+		//public void MyTestInitialize()
+		//{
+		//}
+		//
+		//Use TestCleanup to run code after each test has run
+		//[TestCleanup()]
+		//public void MyTestCleanup()
+		//{
+		//}
+		//
+		#endregion
+
+
+		/// <summary>
+		///A test for SOXResampler Constructor
+		///</summary>
+		[TestMethod()]
+		public void SOXResamplerConstructorTest()
+		{
+			AudioPCMConfig inputPCM = new AudioPCMConfig(32, 1, 44100);
+			AudioPCMConfig outputPCM = new AudioPCMConfig(32, 1, 48000);
+			SOXResamplerConfig cfg;
+			cfg.quality = SOXResamplerQuality.Very;
+			cfg.phase = 50;
+			cfg.allow_aliasing = false;
+			cfg.bandwidth = 0;
+			SOXResampler resampler = new SOXResampler(inputPCM, outputPCM, cfg);
+			AudioBuffer src = new AudioBuffer(inputPCM, 400 * inputPCM.SampleRate / 1000);
+			AudioBuffer dst = new AudioBuffer(outputPCM, src.Size * 3);
+			int offs = 0;
+			double delta = 0;
+			for (int i = 0; i < 100; i++)
+			{
+				src.Prepare(-1);
+				for (int j = 0; j < src.Size; j++)
+					src.Float[j, 0] = (float)Math.Sin((i * src.Size + j) * Math.PI / 44100);
+				src.Length = src.Size;
+				resampler.Flow(src, dst);
+				for (int j = 0; j < dst.Length; j++)
+					delta += dst.Float[j, 0] - Math.Sin((offs + j) * Math.PI / 48000);
+				offs += dst.Length;
+			}
+			Assert.IsTrue(Math.Abs(delta) < 0.00001, "Error too large");
+		}
+	}
+}