public CrossTimeEngine(string configurationFilePath, CrossTimeEngineLog log)
{
this.Configuration = CrossTimeDspConfiguration.Load(configurationFilePath);
this.disposed = false;
this.log = log;
this.Stopping = false;
MediaFoundationApi.Startup();
Filter firstReverseTimeFilter = this.Configuration.Filters.FirstOrDefault(filter => filter.TimeDirection == TimeDirection.Reverse);
if (firstReverseTimeFilter != null)
{
firstReverseTimeFilter.AdjustGain(this.Configuration.Engine.ReverseTimeAntiClippingAttenuationInDB);
}
}
public void InverseAllpassAndWav()
{
// remove any existing output files to guarantee test runs on up to date data
string outputFileName16Bit = "inverseAllpassAndWav.44100.16.double.wav";
string outputFileName24Bit = "inverseAllpassAndWav.44100.24.double.wav";
string outputFileNameQ31x63 = "inverseAllpassAndWav.44100.24.Q31_32x64.wav";
this.RemoveExistingOutputFiles(outputFileName16Bit, outputFileName24Bit, outputFileNameQ31x63);
// run test cases
// check 24 bit cases
CrossTimeEngine engine = new CrossTimeEngine(TestConstant.DefaultConfigurationFile, this);
engine.FilterFiles(Environment.CurrentDirectory, TestConstant.SourceFilePath16Bit, outputFileName24Bit);
this.VerifyWaveFilesEquivalent(outputFileName24Bit, TestConstant.ReferenceFilePath24Bit, TestConstant.ReferenceFileScaleFactor, 1.5 * TestConstant.Q23ToQ31TruncationErrorIncrease, true);
// check cross bitness case - cases in the same bitness are less likely to catch conversion and 24 bit handling defects
// Scale factor is bit length times anti-clipping gain.
// Tolerance here may seem loose but comparing 24 bit samples to their truncated 16 bit form is inexact.
this.VerifyWaveFilesEquivalent(outputFileName24Bit, TestConstant.ReferenceFilePath16Bit, 0.3162 * 256.0, 40.5 * TestConstant.Q23ToQ31TruncationErrorIncrease, false);
// check fixed point
engine.Configuration.Engine.Precision = FilterPrecision.Q31_32x64;
engine.FilterFiles(Environment.CurrentDirectory, TestConstant.SourceFilePath16Bit, outputFileNameQ31x63);
this.VerifyWaveFilesEquivalent(outputFileNameQ31x63, TestConstant.ReferenceFilePath24Bit, TestConstant.ReferenceFileScaleFactor, 1.6 * TestConstant.Q23ToQ31TruncationErrorIncrease, false);
// check 16 bit cases
double adjustmentToUnityGain = -engine.Configuration.Engine.ReverseTimeAntiClippingAttenuationInDB;
engine.Configuration.Engine.Precision = FilterPrecision.Double;
engine.Configuration.Engine.ReverseTimeAntiClippingAttenuationInDB += adjustmentToUnityGain;
Filter firstReverseTimeFilter = engine.Configuration.Filters.FirstOrDefault(filter => filter.TimeDirection == TimeDirection.Reverse);
if (firstReverseTimeFilter != null)
{
firstReverseTimeFilter.AdjustGain(adjustmentToUnityGain);
}
engine.Configuration.Output.BitsPerSample = 16;
engine.FilterFiles(Environment.CurrentDirectory, TestConstant.SourceFilePath16Bit, outputFileName16Bit);
this.VerifyWaveFilesEquivalent(outputFileName16Bit, TestConstant.ReferenceFilePath16Bit, 1.0, 1.0 * TestConstant.Q15ToQ31TruncationErrorIncrease, true);
}
