private static SampleBlock[] ReadSamples <T>(EndianBinaryReader reader, int numWAVISlots) where T : IWavInfo
{
long waviChunkOffset = FindChunk(reader, "wavi");
long pcmdChunkOffset = FindChunk(reader, "pcmd");
if (waviChunkOffset == -1 || pcmdChunkOffset == -1)
{
throw new InvalidDataException();
}
else
{
waviChunkOffset += 0x10;
pcmdChunkOffset += 0x10;
var samples = new SampleBlock[numWAVISlots];
for (int i = 0; i < numWAVISlots; i++)
{
ushort offset = reader.ReadUInt16(waviChunkOffset + (2 * i));
if (offset != 0)
{
T wavInfo = reader.ReadObject <T>(offset + waviChunkOffset);
samples[i] = new SampleBlock
{
WavInfo = wavInfo,
Data = reader.ReadBytes((int)((wavInfo.LoopStart + wavInfo.LoopEnd) * 4), pcmdChunkOffset + wavInfo.SampleOffset)
};
}
}
return(samples);
}
}
public override int Read(byte[] buffer, int offset, int count)
{
if (this.currentBlockNode == null || this.currentBlockNode.Value == null)
{
return(0);
}
SampleBlock block = this.currentBlockNode.Value;
int bytesAvailableInCurrentBlock = block.BytesInUse - this.positionInBlock;
int bytesCopied = Math.Min(bytesAvailableInCurrentBlock, count);
block.CopyTo(this.positionInBlock, buffer, offset, bytesCopied);
this.positionInBlock += bytesCopied;
this.position += bytesCopied;
if (block.BytesInUse <= this.positionInBlock)
{
this.currentBlockNode = this.currentBlockNode.Next;
this.positionInBlock = 0;
int bytesRemainingToCopy = count - bytesAvailableInCurrentBlock;
if (bytesRemainingToCopy > 0)
{
bytesCopied += this.Read(buffer, offset + bytesCopied, bytesRemainingToCopy);
}
}
return(bytesCopied);
}
public SampleBuffer(WaveStream stream)
: this(stream.WaveFormat.SampleRate, stream.WaveFormat.BitsPerSample, stream.WaveFormat.Channels)
{
byte[] buffer = new byte[CrossTimeConstant.SampleBlockSizeInBytes];
SampleType sampleType = SampleTypeExtensions.FromBitsPerSample(stream.WaveFormat.BitsPerSample);
while (stream.CanRead)
{
int bytesRead = stream.Read(buffer, 0, buffer.Length);
if (bytesRead < 1)
{
// workaround for NAudio bug: WaveStream.CanRead is hard coded to true regardless of position
break;
}
SampleBlock block = new SampleBlock(buffer, bytesRead, sampleType);
this.Blocks.AddLast(block);
this.length += block.BytesInUse;
}
}
public unsafe void SampleBlockConversions()
{
SampleBlock reference16Bit;
using (MediaFoundationReader reference16BitReader = new MediaFoundationReader(TestConstant.ReferenceFilePath16Bit))
{
byte[] buffer16Bit = new byte[reference16BitReader.Length];
int bytesRead = reference16BitReader.Read(buffer16Bit, 0, buffer16Bit.Length);
reference16Bit = new SampleBlock(buffer16Bit, bytesRead, SampleTypeExtensions.FromBitsPerSample(reference16BitReader.WaveFormat.BitsPerSample));
}
SampleBlock reference24Bit;
using (MediaFoundationReader reference24BitReader = new MediaFoundationReader(TestConstant.ReferenceFilePath24Bit))
{
byte[] buffer24Bit = new byte[reference24BitReader.Length];
int bytesRead = reference24BitReader.Read(buffer24Bit, 0, buffer24Bit.Length);
reference24Bit = new SampleBlock(buffer24Bit, bytesRead, SampleTypeExtensions.FromBitsPerSample(reference24BitReader.WaveFormat.BitsPerSample));
}
Assert.IsTrue(reference16Bit.Int16Samples == reference24Bit.SamplesInUse);
SampleBlock reference16BitAsDouble = reference16Bit.ConvertTo(SampleType.Double);
SampleBlock reference16BitAsQ31 = reference16Bit.ConvertTo(SampleType.Int32);
SampleBlock reference24BitAsDouble = reference24Bit.ConvertTo(SampleType.Double);
SampleBlock reference24BitAsQ31 = reference24Bit.ConvertTo(SampleType.Int32);
Assert.IsTrue(reference16Bit.Int16Samples == reference16BitAsDouble.DoubleSamples);
Assert.IsTrue(reference16Bit.Int16Samples == reference16BitAsQ31.Int32Samples);
Assert.IsTrue(reference16Bit.Int16Samples == reference24BitAsDouble.DoubleSamples);
Assert.IsTrue(reference16Bit.Int16Samples == reference24BitAsQ31.Int32Samples);
for (int sample = 0; sample < reference16Bit.Int16Samples; ++sample)
{
Assert.IsTrue(((int)reference16Bit.Int16s[sample] << TestConstant.ShiftBetween16BitSamplesAndQ31) == reference16BitAsQ31.Int32s[sample]);
Assert.IsTrue((int)reference16BitAsDouble.Doubles[sample] == reference16BitAsQ31.Int32s[sample]);
Assert.IsTrue((reference24Bit.GetInt24AsInt32(sample) << TestConstant.ShiftBetween24BitSamplesAndQ31) == reference24BitAsQ31.Int32s[sample]);
Assert.IsTrue((int)reference24BitAsDouble.Doubles[sample] == reference24BitAsQ31.Int32s[sample]);
}
}
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));
}
}
}
public Sample GetSample(Sample prevSample)
{
TotalSamples++;
if (!warmUpcomplete)
{
var wmsample = new Sample(this);
var rx = wmsample.GetLazyValue();
var ry = wmsample.GetLazyValue();
wmsample.imageX = rx * screenWidth;
wmsample.imageY = ry * screenHeight;
warmUpcomplete = TotalSamples >= screenWidth * screenHeight * WarmupPasses;
return wmsample;
}
#if VERBOSE
if (TotalSamples == screenWidth * screenHeight * WarmupPasses+1)
{
Tracer.TraceLine("T{0} Warmup complete", tIdx);
var sampleBlocks = new HashSet<SampleBlock>();
foreach (var sampleBlock in blocks)
{
if (!sampleBlocks.Contains(sampleBlock) && (sampleBlock.BlockError(Film) > ErrorStop))
{
sampleBlock.CachedError = sampleBlock.BlockError(Film);
sampleBlocks.Add(sampleBlock);
}
}
this.blocks = sampleBlocks.ToList();
Tracer.TraceLine("T{0} duplicate removal complete", tIdx);
Classify(blocks);
Tracer.TraceLine("T{0} classification complete", tIdx);
}
#endif
CurrentBlock.TotalSamples++;
if (blocks.Count == 0)
{
this.Init(Width, Height);
Tracer.TraceLine("Adaptive sampling complete! Start another iteration");
return null;
}
currentBlockSample++;
if (currentBlockSample >= CurrentBlock.SamplesInBlock(ImportantBlockSamples))
{
blockIndex++;
currentBlockSample= 0;
}
if (blockIndex >= blocks.Count)
{
blockIndex = Math.Min(tIdx, blocks.Count - 1);
}
CurrentBlock = blocks[blockIndex];
if (CurrentBlock.TotalSamples >= CurrentBlock.SamplesPerIteration * CurrentBlock.BlockWidth * CurrentBlock.BlockHeight)
{
var blockError = CurrentBlock.BlockError(this.Film);
if (blockError > ErrorSplit)
{
this.SplitBlock(CurrentBlock);
}
else if (blockError < ErrorStop)
{
#if VERBOSE
Tracer.TraceLine("{0} Block is ready", blockIndex);
Tracer.TraceLine("Rem block {0} block error {1} ", blocks[blockIndex].ToString(), blockError,
blocks[blockIndex].BlockWidth, blocks[blockIndex].BlockHeight);
#endif
this.TotalSamples += this.CurrentBlock.SamplerPerBlock;
#if VERBOSE
Tracer.TraceLine("Block Count " + blocks.Count);
#endif
}
else if (subBlocks.Count < 65535)
{
foreach (var block in blocks)
{
var proposalB = block.Split(block.SamplesPerIteration);
foreach (var proposalBlock in proposalB)
{
if (proposalBlock.BlockError(Film) > block.BlockError(Film))
{
//this.blocks.AddRange(proposalBlock.Split(CurrentBlock.SamplesPerIteration));
subBlocks.Add(proposalBlock);
}
else
{
//this.blocks.Add(proposalBlock);
//this.blocks.AddRange(proposalBlock.Split(proposalBlock.SamplesPerIteration * 2));
subBlocks.AddRange(proposalBlock.Split(proposalBlock.SamplesPerIteration));
//foreach (var block in blocks)
//{
// Film.StatsRect(block.Xstart, block.Ystart, block.BlockWidth, block.BlockHeight, blockIndex);
//}
}
}
}
}
#if VERBOSE
//Tracer.TraceLine("T{4}- Removing {2}/{3} block {1} error {0}", blockError, CurrentBlock.ToString(), blocks.Count, blockIndex, tIdx);
#endif
this.blocks.Remove(CurrentBlock);
if (blocks.Count == 0 && this.subBlocks.Count > 0)
{
Tracer.TraceLine("T{0} Dicing", tIdx);
generation++;
this.blocks = this.subBlocks.ToList();
this.subBlocks.Clear();
var sampleBlocks = new HashSet<SampleBlock>();
foreach (var sampleBlock in blocks)
{
if (!sampleBlocks.Contains(sampleBlock) && (sampleBlock.BlockError(Film) > ErrorStop))
{
sampleBlock.CachedError = sampleBlock.BlockError(Film);
sampleBlocks.Add(sampleBlock);
}
}
#if VERBOSE
Tracer.TraceLine("Removing {0} duplicates", this.blocks.Count - sampleBlocks.Count);
Tracer.TraceLine("T{0} Generation {1} sampling", tIdx, generation);
#endif
Classify(blocks);
}
if (blockIndex >= this.blocks.Count)
{
this.blockIndex = 0;
}
this.CurrentBlock = this.blocks[blockIndex];
this.EvalCurrentBlock();
pass += CurrentBlock.SamplesPerIteration;
#if VERBOSE2
for (int index = 0; index < blocks.Count; index++)
{
var block = blocks[index];
//bool remove = false;
//if ((block.Xstart + block.BlockWidth) > screenWidth)
//{
// Tracer.TraceLine("Invalid block Width " + (block.Xstart + block.BlockWidth));
// remove = true;
//}
//if ((block.Ystart + block.BlockHeight) > screenHeight)
//{
// Tracer.TraceLine("Invalid block Height " + (block.Ystart + block.BlockHeight));
// remove = true;
//}
Film.StatsRect(block.Xstart, block.Ystart, block.BlockWidth, block.BlockHeight, blockIndex);
//if (remove)
//{
// blocks.RemoveAt(index);
// Tracer.TraceLine("Removing invalid block {0} block size {2}x{3}", blockIndex, blockError, blocks[blockIndex].BlockWidth, blocks[blockIndex].BlockHeight);
//}
}
#endif
}
CurrentBlock = blocks[blockIndex];
Sample sample = CurrentBlock.GetSample(this);
return sample;
}
private void SplitBlock(SampleBlock blockToSplit)
{
var index = subBlocks.IndexOf(blockToSplit);
if (((blockToSplit.BlockWidth / 2) <= 1) || (blockToSplit.BlockHeight / 2) <= 1)
{
subBlocks.Remove(blockToSplit);
return;
}
this.subBlocks.InsertRange(Math.Max(0, index - 1), blockToSplit.Split(blockToSplit.SamplesPerIteration));
subBlocks.Remove(blockToSplit);
///blocks.AddRange(blockToSplit.Split(blockToSplit.SamplesPerIteration));
}
public void Init(int width, int height)
{
rnd.Reinitialise((int)DateTime.Now.Ticks);
if (screenWidth == 0 && screenHeight == 0)
{
Width = screenWidth = width;
Height = screenHeight = height;
//screenWidth = width;
//screenHeight = height;
}
screenStartLine = Math.Max(0, screenStartLine);
_currentSampleScreenY = Math.Max(0, screenStartLine);
pass = 0;
TotalSamples = 0;
blockIndex = tIdx;
//var tx = 1;
//var ty = 1;
/*
var tWidth = Width / tx;
var tHeight = Height / ty;
for (int y = 0; y < Height-tHeight; y += tHeight)
{
for (int x = 0; x < Width-tWidth; x += tWidth)
{
var block = new Block() { BlockWidth = tWidth, BlockHeight = tHeight, SamplesPerIteration = SamplesPerPass, Xstart = x, Ystart = y };
blocks.Add(block);
}
}
CurrentBlock = blocks[0];*/
CurrentBlock = new SampleBlock() { BlockWidth = screenWidth, BlockHeight = screenHeight, SamplesPerIteration = SamplesPerPass };
//this.blocks.Add(CurrentBlock);
this.blocks.AddRange(CurrentBlock.MassSplit(4, SamplesPerPass));
//this.blocks.Sort((a, b) => a.CachedError.CompareTo(b.CachedError));
//this.blocks.ForEach(item => { item.Important = this.blocks.IndexOf(item) > this.blocks.Count / 2; });
}
private unsafe void VerifyWaveFilesEquivalent(string actualFilePath, string expectedFilePath, double expectedToActualScaleFactor, double sampleMatchTolerance, bool verifySampleSize)
{
// load data in files
SampleBlock actual;
WaveFormat actualFormat;
using (MediaFoundationReader actualReader = new MediaFoundationReader(actualFilePath))
{
byte[] buffer = new byte[actualReader.Length];
int bytesRead = actualReader.Read(buffer, 0, buffer.Length);
actual = new SampleBlock(buffer, bytesRead, SampleTypeExtensions.FromBitsPerSample(actualReader.WaveFormat.BitsPerSample));
actualFormat = actualReader.WaveFormat;
}
SampleBlock expected;
WaveFormat expectedFormat;
using (MediaFoundationReader expectedReader = new MediaFoundationReader(expectedFilePath))
{
byte[] buffer = new byte[expectedReader.Length];
int bytesRead = expectedReader.Read(buffer, 0, buffer.Length);
expected = new SampleBlock(buffer, bytesRead, SampleTypeExtensions.FromBitsPerSample(expectedReader.WaveFormat.BitsPerSample));
expectedFormat = expectedReader.WaveFormat;
}
// check data format matches
Assert.IsTrue(actual.SamplesInUse == expected.SamplesInUse);
if (verifySampleSize)
{
Assert.IsTrue(actual.SampleType == expected.SampleType);
Assert.IsTrue(actualFormat.AverageBytesPerSecond == expectedFormat.AverageBytesPerSecond);
Assert.IsTrue(actualFormat.BitsPerSample == expectedFormat.BitsPerSample);
Assert.IsTrue(actualFormat.BlockAlign == expectedFormat.BlockAlign);
}
Assert.IsTrue(actualFormat.Channels == expectedFormat.Channels);
Assert.IsTrue(actualFormat.Encoding == expectedFormat.Encoding);
Assert.IsTrue(actualFormat.ExtraSize == expectedFormat.ExtraSize);
Assert.IsTrue(actualFormat.SampleRate == expectedFormat.SampleRate);
double largestMismatch = 0.0;
double maxExpectedValue = Math.Pow(2.0, expected.SampleType.BitsPerSample() - 1) - 1;
double minExpectedValue = -Math.Pow(2.0, expected.SampleType.BitsPerSample() - 1);
double mismatchStandardDevation = 0.0;
using (FileStream samplesStream = new FileStream(String.Format("{0} - {1}.csv", Path.GetFileNameWithoutExtension(actualFilePath), Path.GetFileNameWithoutExtension(expectedFilePath)), FileMode.Create))
{
using (StreamWriter samplesWriter = new StreamWriter(samplesStream))
{
samplesWriter.WriteLine("actual,expected");
int clippedSamples = 0;
int mismatchedSamples = 0;
int samples = expected.SamplesInUse;
for (int sample = 0; sample < samples; ++sample)
{
// read samples as ints and convert to doubles regardless of sample type in files
double actualSample;
switch (actual.SampleType)
{
case SampleType.Int16:
actualSample = actual.Int16s[sample];
break;
case SampleType.Int24:
actualSample = actual.GetInt24AsInt32(sample);
break;
case SampleType.Int32:
actualSample = actual.Int32s[sample];
break;
default:
throw new NotSupportedException(String.Format("Unhandled sample type {0}.", expected.SampleType));
}
actualSample = actualSample / expectedToActualScaleFactor;
double expectedSample;
switch (expected.SampleType)
{
case SampleType.Int16:
expectedSample = expected.Int16s[sample];
break;
case SampleType.Int24:
expectedSample = expected.GetInt24AsInt32(sample);
break;
case SampleType.Int32:
expectedSample = expected.Int32s[sample];
break;
default:
throw new NotSupportedException(String.Format("Unhandled sample type {0}.", expected.SampleType));
}
samplesWriter.WriteLine("{0},{1}", actualSample, expectedSample);
// it's OK if the expected data is clipped and the actual data isn't
if (expectedSample >= maxExpectedValue && actualSample > expectedSample)
{
++clippedSamples;
continue;
}
if (expectedSample <= minExpectedValue && actualSample < expectedSample)
{
++clippedSamples;
continue;
}
// check samples for equivalence
// standard deviation calculation is naive as it assumes the average mismatch is zero
double mismatch = Math.Abs(expectedSample - actualSample);
mismatchStandardDevation += mismatch * mismatch;
if (mismatch > largestMismatch)
{
largestMismatch = mismatch;
}
if (mismatch > sampleMatchTolerance)
{
++mismatchedSamples;
}
}
mismatchStandardDevation = Math.Sqrt(mismatchStandardDevation / (double)expected.SamplesInUse);
this.TestContext.WriteLine("Largest mismatch in samples between {0} and {1} was {2:0.0} with a standard deviation of {3:0.0}.", actualFilePath, expectedFilePath, largestMismatch, mismatchStandardDevation);
this.TestContext.WriteLine(">>> {0} samples exceeded threshold of {1:0.0}.", mismatchedSamples, sampleMatchTolerance);
Assert.IsTrue(mismatchedSamples == 0, "{0} of {1} ({2:#0.0%}) samples did not match within tolerance {3}.", mismatchedSamples, samples, (double)mismatchedSamples / (double)samples, sampleMatchTolerance);
if (verifySampleSize)
{
Assert.IsTrue(clippedSamples < 0.0001 * samples, "{0} (1:#0.000%) samples were clipped; this is unexpectedly high.", clippedSamples, (double)clippedSamples / (double)samples);
}
}
}
// check metadata
Tag actualMetadata;
using (FileStream inputMetadataStream = new FileStream(actualFilePath, FileMode.Open, FileAccess.Read, FileShare.Read))
{
using (TagFile inputTagFile = TagFile.Create(new StreamFileAbstraction(inputMetadataStream.Name, inputMetadataStream, inputMetadataStream)))
{
actualMetadata = inputTagFile.Tag;
}
}
Tag expectedMetadata;
using (FileStream outputMetadataStream = new FileStream(expectedFilePath, FileMode.Open, FileAccess.Read, FileShare.Read))
{
using (TagFile outputTagFile = TagFile.Create(new StreamFileAbstraction(outputMetadataStream.Name, outputMetadataStream, outputMetadataStream)))
{
expectedMetadata = outputTagFile.Tag;
}
}
Assert.AreEqual(expectedMetadata.Album, actualMetadata.Album, String.Format("Expected artist '{0}' but got '{1}'.", expectedMetadata.Album, actualMetadata.Album));
Assert.AreEqual(expectedMetadata.AmazonId, actualMetadata.AmazonId, String.Format("Expected Amazon ID '{0}' but got '{1}'.", expectedMetadata.AmazonId, actualMetadata.AmazonId));
Assert.AreEqual(expectedMetadata.Conductor, actualMetadata.Conductor, String.Format("Expected conductor '{0}' but got '{1}'.", expectedMetadata.Conductor, actualMetadata.Conductor));
Assert.AreEqual(expectedMetadata.Copyright, actualMetadata.Copyright, String.Format("Expected copyright '{0}' but got '{1}'.", expectedMetadata.Copyright, actualMetadata.Copyright));
Assert.AreEqual(expectedMetadata.Disc, actualMetadata.Disc, String.Format("Expected disc '{0}' but got '{1}'.", expectedMetadata.Disc, actualMetadata.Disc));
Assert.AreEqual(expectedMetadata.DiscCount, actualMetadata.DiscCount, String.Format("Expected disc count '{0}' but got '{1}'.", expectedMetadata.DiscCount, actualMetadata.DiscCount));
Assert.AreEqual(expectedMetadata.Grouping, actualMetadata.Grouping, String.Format("Expected grouping '{0}' but got '{1}'.", expectedMetadata.Grouping, actualMetadata.Grouping));
Assert.AreEqual(expectedMetadata.Lyrics, actualMetadata.Lyrics, String.Format("Expected lyrics '{0}' but got '{1}'.", expectedMetadata.Lyrics, actualMetadata.Lyrics));
Assert.AreEqual(expectedMetadata.JoinedAlbumArtists, actualMetadata.JoinedAlbumArtists, String.Format("Expected artists '{0}' but got '{1}'.", expectedMetadata.JoinedAlbumArtists, actualMetadata.JoinedAlbumArtists));
Assert.AreEqual(expectedMetadata.JoinedComposers, actualMetadata.JoinedComposers, String.Format("Expected composers '{0}' but got '{1}'.", expectedMetadata.JoinedComposers, actualMetadata.JoinedComposers));
Assert.AreEqual(expectedMetadata.JoinedGenres, actualMetadata.JoinedGenres, String.Format("Expected genres '{0}' but got '{1}'.", expectedMetadata.JoinedGenres, actualMetadata.JoinedGenres));
Assert.AreEqual(expectedMetadata.JoinedPerformersSort, actualMetadata.JoinedPerformersSort, String.Format("Expected performers '{0}' but got '{1}'.", expectedMetadata.JoinedPerformersSort, actualMetadata.JoinedPerformersSort));
// Pictures is not checked
Assert.AreEqual(expectedMetadata.Title, actualMetadata.Title, String.Format("Expected title '{0}' but got '{1}'.", expectedMetadata.Title, actualMetadata.Title));
Assert.AreEqual(expectedMetadata.Track, actualMetadata.Track, String.Format("Expected track '{0}' but got '{1}'.", expectedMetadata.Track, actualMetadata.Track));
Assert.AreEqual(expectedMetadata.TrackCount, actualMetadata.TrackCount, String.Format("Expected track count '{0}' but got '{1}'.", expectedMetadata.TrackCount, actualMetadata.TrackCount));
Assert.AreEqual(expectedMetadata.Year, actualMetadata.Year, String.Format("Expected year '{0}' but got '{1}'.", expectedMetadata.Year, actualMetadata.Year));
}
private WaveStream FilterStream(WaveStream inputStream, out StreamPerformance performance)
{
performance = new StreamPerformance();
// populate filters
FilterBank forwardTimeFilters = new FilterBank(this.Configuration.Engine.Precision, inputStream.WaveFormat.SampleRate, inputStream.WaveFormat.Channels, this.Configuration.Engine.Q31Adaptive.Q31_32x64_Threshold, this.Configuration.Engine.Q31Adaptive.Q31_64x64_Threshold);
FilterBank reverseTimeFilters = new FilterBank(this.Configuration.Engine.Precision, inputStream.WaveFormat.SampleRate, inputStream.WaveFormat.Channels, this.Configuration.Engine.Q31Adaptive.Q31_32x64_Threshold, this.Configuration.Engine.Q31Adaptive.Q31_64x64_Threshold);
foreach (Filter filter in this.Configuration.Filters)
{
switch (filter.TimeDirection)
{
case TimeDirection.Forward:
filter.AddTo(forwardTimeFilters);
break;
case TimeDirection.Reverse:
filter.AddTo(reverseTimeFilters);
break;
default:
throw new NotSupportedException(String.Format("Unhandled time direction {0}.", filter.TimeDirection));
}
}
// do reverse time pass
// If the only reverse time filter is the anti-clipping gain then there's nothing to do.
SampleType dataPathSampleType = this.Configuration.Engine.Precision == FilterPrecision.Double ? SampleType.Double : SampleType.Int32;
bool hasForwardTimeFilters = forwardTimeFilters.FilterCount > 0;
SampleType outputSampleType = SampleTypeExtensions.FromBitsPerSample(this.Configuration.Output.BitsPerSample);
if (reverseTimeFilters.FilterCount > 0 && (this.Stopping == false))
{
using (SampleBuffer inputBuffer = new SampleBuffer(inputStream))
{
// set up buffer for output of reverse time pass and dispose input stream as it's no longer needed
performance.ReverseBufferCompleteUtc = DateTime.UtcNow;
SampleType reverseTimeSampleType = hasForwardTimeFilters ? dataPathSampleType : outputSampleType;
SampleBuffer reverseTimeBuffer = new SampleBuffer(inputStream.WaveFormat.SampleRate, reverseTimeSampleType.BitsPerSample(), inputStream.WaveFormat.Channels);
inputStream.Dispose();
// input blocks are disposed as they're processed to limit peak memory consumption (and removed from the input buffer for completeness)
SampleBlock recirculatingDataPathBlock = null;
for (LinkedListNode <SampleBlock> blockNode = inputBuffer.Blocks.Last; blockNode != null; blockNode = blockNode.Previous, inputBuffer.Blocks.RemoveLast())
{
using (SampleBlock block = blockNode.Value)
{
SampleBlock filteredBlock = reverseTimeFilters.FilterReverse(block, dataPathSampleType, reverseTimeSampleType, ref recirculatingDataPathBlock);
reverseTimeBuffer.Blocks.AddFirst(filteredBlock);
}
if (this.Stopping)
{
break;
}
}
if (recirculatingDataPathBlock != null)
{
recirculatingDataPathBlock.Dispose();
}
// prepare to apply forward time pass to output of reverse time pass or just to write output
reverseTimeBuffer.RecalculateBlocks();
inputStream = reverseTimeBuffer;
performance.ReverseTimeCompleteUtc = DateTime.UtcNow;
}
}
// do forward time pass
if (hasForwardTimeFilters && (this.Stopping == false))
{
SampleBuffer outputStream = new SampleBuffer(inputStream.WaveFormat.SampleRate, outputSampleType.BitsPerSample(), inputStream.WaveFormat.Channels);
SampleBlock recirculatingDataPathBlock = null;
if (inputStream is SampleBuffer)
{
SampleBuffer inputBlocks = (SampleBuffer)inputStream;
for (LinkedListNode <SampleBlock> blockNode = inputBlocks.Blocks.First; blockNode != null; blockNode = blockNode.Next, inputBlocks.Blocks.RemoveFirst())
{
using (SampleBlock block = blockNode.Value)
{
SampleBlock filteredBlock = forwardTimeFilters.Filter(block, dataPathSampleType, outputSampleType, ref recirculatingDataPathBlock);
outputStream.Blocks.AddLast(filteredBlock);
}
if (this.Stopping)
{
break;
}
}
}
else
{
byte[] inputBuffer = new byte[Constant.SampleBlockSizeInBytes];
while (inputStream.CanRead)
{
int bytesRead = inputStream.Read(inputBuffer, 0, inputBuffer.Length);
if (bytesRead < 1)
{
// workaround for NAudio bug: WaveStream.CanRead is hard coded to true regardless of position
break;
}
using (SampleBlock block = new SampleBlock(inputBuffer, bytesRead, SampleTypeExtensions.FromBitsPerSample(inputStream.WaveFormat.BitsPerSample)))
{
SampleBlock filteredBlock = forwardTimeFilters.Filter(block, dataPathSampleType, outputSampleType, ref recirculatingDataPathBlock);
outputStream.Blocks.AddLast(filteredBlock);
}
if (this.Stopping)
{
return(null);
}
}
}
if (recirculatingDataPathBlock != null)
{
recirculatingDataPathBlock.Dispose();
}
// release input stream as it's no longer needed and complete output
inputStream.Dispose();
outputStream.RecalculateBlocks();
inputStream = outputStream;
}
forwardTimeFilters.Dispose();
reverseTimeFilters.Dispose();
performance.CompleteTimeUtc = DateTime.UtcNow;
return(inputStream);
}
public ActionResult SampleBlock(SampleBlock block)
{
// Do something here with your block instance and return a result that should be rendered by the Page Builder.
return(View(block));
}
