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);
}
}
private void FilterStream(CrossTimeDspConfiguration configuration, SampleBuffer inputBuffer, SampleType dataPathSampleType, SampleType outputSampleType)
{
// setup
FilterBank filters = new FilterBank(configuration.Engine.Precision, inputBuffer.WaveFormat.SampleRate, inputBuffer.WaveFormat.Channels, configuration.Engine.Q31Adaptive.Q31_32x64_Threshold, configuration.Engine.Q31Adaptive.Q31_64x64_Threshold);
foreach (Filter filter in configuration.Filters)
{
filter.AddTo(filters);
}
// time duration of reverse time pass
DateTime filteringStartedUtc = DateTime.UtcNow;
using (SampleBuffer reverseTimeBuffer = new SampleBuffer(inputBuffer.WaveFormat.SampleRate, outputSampleType.BitsPerSample(), inputBuffer.WaveFormat.Channels))
{
SampleBlock recirculatingDataPathBlock = null;
for (LinkedListNode <SampleBlock> blockNode = inputBuffer.Blocks.Last; blockNode != null; blockNode = blockNode.Previous)
{
SampleBlock filteredBlock = filters.FilterReverse(blockNode.Value, dataPathSampleType, outputSampleType, ref recirculatingDataPathBlock);
reverseTimeBuffer.Blocks.AddFirst(filteredBlock);
}
if (recirculatingDataPathBlock != null)
{
recirculatingDataPathBlock.Dispose();
}
reverseTimeBuffer.RecalculateBlocks();
DateTime filteringStoppedUtc = DateTime.UtcNow;
if (filters.TimingAvailable)
{
this.TestContext.WriteLine("{0} ({1} {2} {3})", (filteringStoppedUtc - filteringStartedUtc).ToString(Constant.ElapsedTimeFormat), filters.ToDataPathTime.ToString(Constant.ElapsedTimeFormat), filters.FilterTime.ToString(Constant.ElapsedTimeFormat), filters.ToOutputTime.ToString(Constant.ElapsedTimeFormat));
}
else
{
this.TestContext.WriteLine("{0}", (filteringStoppedUtc - filteringStartedUtc).ToString(Constant.ElapsedTimeFormat));
}
}
}
