/// <summary>
/// Load a wave file for processing.
/// </summary>
/// <param name="filePath">Waveform file path.</param>
public void Load(string filePath)
{
_filePath = filePath;
WaveFile waveFile = new WaveFile();
waveFile.Load(filePath);
switch (waveFile.Format.BitsPerSample)
{
case (int)WaveBitsPerSample.Sixteen:
_waveData = ArrayHelper.BinaryConvertArray(waveFile.GetSoundData());
break;
default:
string message = string.Format(CultureInfo.InvariantCulture,
"Only {0} bits per sample waveform is supported. But it is {1} bits per sample of waveform file [{2}].",
(int)WaveBitsPerSample.Sixteen, waveFile.Format.BitsPerSample, filePath);
throw new NotSupportedException(message);
}
_samplesPerSecond = waveFile.Format.SamplesPerSecond;
}
/// <summary>
/// Affix waveform file to certain waveform file.
/// </summary>
/// <param name="sourceWaveDir">Source waveform file directory.</param>
/// <param name="targetWaveDir">Target waveform file directory.</param>
/// <param name="affixingFile">Affixing waveform file.</param>
private static void AffixWaveFiles(string sourceWaveDir,
string targetWaveDir, WaveFile affixingFile)
{
Dictionary<string, string> srcMap =
Microsoft.Tts.Offline.FileListMap.Build(sourceWaveDir, ".wav");
foreach (string id in srcMap.Keys)
{
string dstFilePath = Path.Combine(targetWaveDir, srcMap[id] + ".wav");
if (File.Exists(dstFilePath))
{
continue;
}
string srcFilePath = Path.Combine(sourceWaveDir, srcMap[id] + ".wav");
Helper.EnsureFolderExistForFile(dstFilePath);
WaveFile tgtWf = new WaveFile();
WaveFile srcWf = new WaveFile();
srcWf.Load(srcFilePath);
tgtWf.Append(affixingFile);
tgtWf.Append(srcWf);
tgtWf.Append(affixingFile);
tgtWf.Save(dstFilePath);
}
}
/// <summary>
/// Reset.
/// </summary>
public void Reset()
{
_waveFile = null;
_sampleOffset = 0;
_sampleLength = 0;
_movingMode = false;
_cumulateShift = 0;
Invalidate();
}
/// <summary>
/// Write a Single[] to a WAV file. Mostly for debugging purposes, this
/// Routine generates a WAV file whose duration is the same as
/// That of the original waveform.
/// </summary>
/// <param name="filePath">Target file to save.</param>
/// <param name="outWave">Waveform samples to save.</param>
/// <param name="samplesPerSecond">Samples per second.</param>
public static void WriteWaveFile(string filePath, float[] outWave, int samplesPerSecond)
{
short[] waveData = ArrayHelper.ToInt16<float>(outWave);
WaveFormat waveFormat = new WaveFormat();
waveFormat.Channels = 1;
waveFormat.BlockAlign = 2;
waveFormat.BitsPerSample = 16;
waveFormat.ExtSize = 0;
waveFormat.FormatTag = WaveFormatTag.Pcm;
waveFormat.SamplesPerSecond = samplesPerSecond;
waveFormat.AverageBytesPerSecond = checked(samplesPerSecond * 2);
WaveFile waveFile = new WaveFile();
waveFile.Format = waveFormat;
RiffChunk waveDataChunk = waveFile.Riff.GetChunk(Riff.IdData);
byte[] byteData = ArrayHelper.BinaryConvertArray(waveData);
waveDataChunk.SetData(byteData);
waveDataChunk.Size = waveDataChunk.GetData().Length;
waveFile.Save(filePath);
}
/// <summary>
/// Writes the right margin if possible.
/// </summary>
/// <param name="waveFile">The given wave file where the current candidate belongs to.</param>
/// <param name="candidate">The current candidate.</param>
/// <param name="candidateInfo">The candidate information of the current candidate.</param>
private void WriteRightMargin(WaveFile waveFile, UnitCandidate candidate, WaveCandidateInfo candidateInfo)
{
if (_ccMarginLength + _fsMarginLength > 0)
{
int rightMarginLength = (_ccMarginLength / 2) + _fsMarginLength;
int waveSampleOffsetInSentence = (int)((candidate.StartTimeInSecond * waveFile.Format.SamplesPerSecond) + 0.5f);
int waveSampleLength = (int)(((candidate.EndTimeInSecond - candidate.StartTimeInSecond) * waveFile.Format.SamplesPerSecond) + 0.5f);
// Right margin section.
if (candidate.Index == candidate.Sentence.Candidates.Count - 1)
{
// It means the candidate is the last one, there is no next candidate. So, writes some zero as margin.
WriteZeroMargin(rightMarginLength);
}
else if (candidate.Sentence.Candidates[candidate.Index + 1].Id == UnitCandidate.InvalidId)
{
// There is a next candidate and it isn't in the inventory. So, writes the next candidate as margin.
int offset = (int)(waveSampleOffsetInSentence + waveSampleLength);
int count = (waveFile.GetSoundData().Length / (waveFile.Format.BitsPerSample / 8)) - offset;
if (count < rightMarginLength)
{
WriteIntoInventory(ConvertsWaveDataFormat(waveFile, offset, count));
WriteZeroMargin(rightMarginLength - count);
}
else
{
WriteIntoInventory(ConvertsWaveDataFormat(waveFile, offset, rightMarginLength));
}
}
}
}
/// <summary>
/// Adds a sentence into wave inventory.
/// </summary>
/// <param name="sentence">The given sentence.</param>
/// <param name="waveFile">The corresponding wave form file.</param>
private void Add(Sentence sentence, WaveFile waveFile)
{
Debug.Assert(waveFile.Format.SamplesPerSecond == _header.SamplesPerSecond &&
waveFile.Format.Channels == 1 &&
waveFile.Format.FormatTag == WaveFormatTag.Pcm,
"Only supports source waveform with single channel, PCM and same sampling rate.");
// Here, I change the original design. Original design is not save the wave data of pruned candidate, but it will introduce bug when current frame shifting
// design happens, so I change the design as to save all wave data into inventory file, it will make .WVE data size increases 30%. It is fine for M1.
// Consider more candidates will be pruned in M2, so we need a refactor on wave inventory creation module. To ensure minimum disk size as well as no bug.
int firstValidIndex = sentence.Candidates.Count;
for (int candIdx = 0; candIdx < sentence.Candidates.Count; candIdx++)
{
UnitCandidate candidate = sentence.Candidates[candIdx];
int waveSampleOffsetInSentence = (int)((candidate.StartTimeInSecond * waveFile.Format.SamplesPerSecond) + 0.5f);
int waveSampleLength = (int)(((candidate.EndTimeInSecond - candidate.StartTimeInSecond) * waveFile.Format.SamplesPerSecond) + 0.5f);
if (candidate.Id != UnitCandidate.InvalidId)
{
if (waveSampleLength > ushort.MaxValue)
{
throw new InvalidDataException(Helper.NeutralFormat(
"The wave sample length of {0}-th candidate in file {1}.wav overflows.", candIdx, sentence.Id));
}
WaveCandidateInfo candidateInfo = new WaveCandidateInfo
{
Name = candidate.Name,
Id = candidate.Id,
GlobalId = candidate.GlobalId,
SentenceId = candidate.Sentence.Id,
IndexOfNonSilence = (ushort)candidate.IndexOfNonSilence,
FrameIndexInSentence = (ushort)candidate.StartFrame,
FrameNumber = (ushort)(candidate.EndFrame - candidate.StartFrame),
FrameIndex = (uint)(sentence.GlobalFrameIndex + candidate.StartFrame),
};
if (firstValidIndex > candIdx && _indexingFile.SamplePerFrame == 0)
{
firstValidIndex = candIdx;
if (candidateInfo.FrameNumber != 0)
{
_indexingFile.SamplePerFrame = (uint)(waveSampleLength / candidateInfo.FrameNumber);
}
}
else
{
if (candidateInfo.FrameNumber != 0)
{
Debug.Assert(_indexingFile.SamplePerFrame == (uint)(waveSampleLength / candidateInfo.FrameNumber));
}
}
// calc left/right extensible margin, shift at most 1 units to ensure less than 1 unit.
int leftMarginUnitIdx = Math.Max(0, candIdx - 1);
int rightMarginUnitIdx = Math.Min(candIdx + 1, sentence.Candidates.Count - 1);
int leftMarginFrame = candidate.StartFrame - sentence.Candidates[leftMarginUnitIdx].StartFrame;
int rightMarginFrame = sentence.Candidates[rightMarginUnitIdx].EndFrame - candidate.EndFrame;
Debug.Assert(leftMarginFrame >= 0 && rightMarginFrame >= 0);
candidateInfo.LeftMarginInFrame = (byte)Math.Min(leftMarginFrame, MaxMarginInFrame);
candidateInfo.RightMarginInFrame = (byte)Math.Min(rightMarginFrame, MaxMarginInFrame);
// Writes the current candidate, throw exception if unit index alignment is inconsistent with wave inventory.
long candidatePosition = candidateInfo.FrameIndex * // frame
_millisecondPerFrame * // convert frame to millisecond
(waveFile.Format.SamplesPerSecond / 1000) * // get samples per milliseconds (1s == 1000ms), convert millisecond to sample
_header.BytesPerSample; // convert sample to byte
long wavePosition = _writer.BaseStream.Position - _dataOffset;
if (candidatePosition != wavePosition)
{
throw new InvalidDataException(Helper.NeutralFormat(
"Frame {0} in sentence {1} starts at {2}, which is inconsistent with position in wave inventory {3}.\r\nPossible cause: bad MLF alignment.",
candidateInfo.FrameIndexInSentence, candidateInfo.SentenceId, candidateInfo.FrameIndex, wavePosition));
}
WriteIntoInventory(ConvertsWaveDataFormat(waveFile, waveSampleOffsetInSentence, waveSampleLength));
_indexingFile.Add(candidateInfo);
}
else
{
WriteIntoInventory(ConvertsWaveDataFormat(waveFile, waveSampleOffsetInSentence, waveSampleLength));
}
}
}
/// <summary>
/// Extracts features from the given script.
/// </summary>
/// <param name="script">
/// The xml script file.
/// </param>
/// <param name="fileListMap">
/// The file list map.
/// </param>
/// <param name="alignmentDir">
/// The alignment directory.
/// </param>
/// <param name="waveDir">
/// The wave directory.
/// </param>
/// <returns>
/// The extracted features in training sentence set.
/// </returns>
/// <exception cref="ArgumentNullException">
/// Exception.
/// </exception>
public TrainingSentenceSet Extract(XmlScriptFile script, FileListMap fileListMap, string alignmentDir,
string waveDir)
{
if (script == null)
{
throw new ArgumentNullException("script");
}
if (fileListMap == null)
{
throw new ArgumentNullException("fileListMap");
}
if (alignmentDir == null)
{
throw new ArgumentNullException("alignmentDir");
}
if (waveDir == null)
{
throw new ArgumentNullException("waveDir");
}
TrainingSentenceSet sentenceSet = new TrainingSentenceSet { FileListMap = fileListMap };
List<string> errList = new List<string>();
foreach (string sid in fileListMap.Map.Keys)
{
ScriptItem item = script.ItemDic[sid];
try
{
// Loads the segmentation file.
SegmentFile segmentFile = new SegmentFile();
segmentFile.Load(fileListMap.BuildPath(alignmentDir, sid, "txt"));
// Loads the waveform file to set the end time of the last segmentation.
WaveFile waveFile = new WaveFile();
waveFile.Load(fileListMap.BuildPath(waveDir, sid, FileExtensions.Waveform));
segmentFile.WaveSegments[segmentFile.WaveSegments.Count - 1].EndTime = waveFile.Duration;
// Extracts the single script item.
Sentence sentence = Extract(item, segmentFile);
sentence.TrainingSet = sentenceSet;
sentenceSet.Sentences.Add(sid, sentence);
}
catch (Exception e)
{
if (!(e is InvalidDataException))
{
throw;
}
// Removes the error sentences.
Logger.Log(Helper.BuildExceptionMessage(e));
script.Remove(sid);
errList.Add(sid);
}
}
fileListMap.RemoveItems(errList);
return sentenceSet;
}
/// <summary>
/// Extract related features from wave: zero crossing, energy, autocorrelation.
/// </summary>
/// <param name="args">Arguments: wave file, fea file.</param>
/// <param name="logWriter">LogWriter to implement parallel computing interface.</param>
/// <exception cref="ArgumentException">Exception.</exception>
public static void ExtractRelatedFeaturesOneFile(string[] args, TextWriter logWriter)
{
// check arguments.
if (args.Length < 2)
{
throw new ArgumentException("Arguments for ExtractRelatedFeaturesOneFile: input wave file, output fea file");
}
// check input and output file.
string wavePath = args[0];
string feaFile = args[1];
int frameShift = int.Parse(args[2]);
int framelength = int.Parse(args[3]);
// output <zeroCrossing energy autoCorrelation>.
using (StreamWriter sw = new StreamWriter(feaFile, false))
{
// load wave
WaveFile waveFile = new WaveFile();
waveFile.Load(wavePath);
short[] waveData = ArrayHelper.BinaryConvertArray(waveFile.GetSoundData());
// calculate features.
for (int i = 0;; ++i)
{
if ((((i + 1) * frameShift) + (framelength / 2)) > waveData.Length)
{
break;
}
int nzero = 0;
double energy = 0;
double autoCorr = 0;
double dsum = 0;
double product1 = 0;
double product2 = 0;
int pos = (i + 1) * frameShift;
int nbegin = pos - (framelength / 2);
int nend = pos + (framelength / 2);
if (nend <= waveData.Length && nbegin >= 0)
{
if (nbegin == 0)
{
// process each frame.
int j = nbegin;
for (; j < nend - 1; ++j)
{
if ((waveData[j] < 0 && waveData[j + 1] > 0)
|| (waveData[j] > 0 && waveData[j + 1] < 0)
|| (waveData[j] == 0 && waveData[j + 1] != 0))
{
nzero++;
}
energy += waveData[j] * waveData[j];
}
// calculate energy.
energy += waveData[j] * waveData[j];
energy = energy / framelength;
energy = 10 * Math.Log(Minimum + energy);
}
else
{
// process each frame.
int j = nbegin;
for (; j < nend - 1; ++j)
{
if ((waveData[j] < 0 && waveData[j + 1] > 0)
|| (waveData[j] > 0 && waveData[j + 1] < 0)
|| (waveData[j] == 0 && waveData[j + 1] != 0))
{
nzero++;
}
energy += waveData[j] * waveData[j];
dsum += waveData[j] * waveData[j - 1];
product1 += waveData[j] * waveData[j];
product2 += waveData[j - 1] * waveData[j - 1];
}
// calculate energy.
energy += waveData[j] * waveData[j];
energy = energy / framelength;
energy = 10 * Math.Log(Minimum + energy);
// calculate auto correlation.
dsum += waveData[j] * waveData[j - 1];
product1 += waveData[j] * waveData[j];
product2 += waveData[j - 1] * waveData[j - 1];
autoCorr = dsum / Math.Sqrt(product1 * product2);
}
}
sw.WriteLine("{0} {1:F6} {2:F6}", nzero, energy, autoCorr);
}
}
}
/// <summary>
/// Convert the WaveFile instance into another samples per second.
/// </summary>
/// <param name="waveFile">Waveform instance to resample.</param>
/// <param name="targetSamplesPerSecond">Samples per second of the target waveform file.</param>
public static void Resample(WaveFile waveFile, int targetSamplesPerSecond)
{
if (waveFile == null)
{
throw new ArgumentNullException("waveFile");
}
if (waveFile.Riff == null)
{
string message = Helper.NeutralFormat("The Riff of wave file should not bu null.");
throw new ArgumentNullException("waveFile", message);
}
if (waveFile.DataIn16Bits == null)
{
string message = Helper.NeutralFormat("The DataIn16Bits of wave file should not bu null.");
throw new ArgumentNullException("waveFile", message);
}
if (waveFile.Format.BitsPerSample != SupportedBitsPerSample)
{
string message = string.Format(CultureInfo.InvariantCulture,
"Only {0}bit waveform file supported for resampling.",
SupportedBitsPerSample);
throw new NotSupportedException(message);
}
if (waveFile.Format.Channels != SupportedChannels)
{
string message = string.Format(CultureInfo.InvariantCulture,
"Only {0} channel waveform file supported for resampling.",
SupportedChannels);
throw new NotSupportedException(message);
}
// Do nothing if both samples per second are the same
if (waveFile.Format.SamplesPerSecond != targetSamplesPerSecond)
{
// If both samples per second are not the same
// Validate cache data encoded in Short
if (waveFile.DataIn16Bits.Length != waveFile.GetSoundData().Length / sizeof(short))
{
string message = string.Format(CultureInfo.InvariantCulture,
"The Data in 16 bits buffer is not updated with the sound data.");
Debug.Assert(false, message);
throw new InvalidDataException(message);
}
ResampleFilter resample = new ResampleFilter(waveFile.Format.SamplesPerSecond,
targetSamplesPerSecond);
// Re-sample
short[] targetSamples = resample.Resample(waveFile.DataIn16Bits);
// Update the target sound data into the WaveFile instance
RiffChunk dataChunk = waveFile.Riff.GetChunk(Riff.IdData);
dataChunk.SetData(ArrayHelper.BinaryConvertArray(targetSamples));
WaveFormat format = waveFile.Format;
format.SamplesPerSecond = targetSamplesPerSecond;
format.AverageBytesPerSecond =
format.SamplesPerSecond * waveFile.Format.BitsPerSample / 8;
waveFile.Format = format;
}
}
/// <summary>
/// Resample the source waveform file to 16k Hz waveform file.
/// </summary>
/// <param name="sourceFile">Location of source waveform file.</param>
/// <param name="targetFile">Location of target waveform file.</param>
/// <param name="targetSamplesPerSecond">Samples per second of the target waveform file.</param>
public static void Resample(string sourceFile, string targetFile, int targetSamplesPerSecond)
{
if (string.IsNullOrEmpty(sourceFile))
{
throw new ArgumentNullException("sourceFile");
}
if (string.IsNullOrEmpty(targetFile))
{
throw new ArgumentNullException("targetFile");
}
WaveFormat format = WaveFile.ReadFormat(sourceFile);
if (format.SamplesPerSecond < targetSamplesPerSecond)
{
throw new NotSupportedException(Helper.NeutralFormat(
"Resampling tool will introduce obvious aliasing " +
"noise when upsampling from [{0}] to [[1}], refer to bug #12628",
format.SamplesPerSecond, targetSamplesPerSecond));
}
WaveFile waveFile = new WaveFile();
waveFile.Load(sourceFile);
Resample(waveFile, targetSamplesPerSecond);
Helper.EnsureFolderExistForFile(targetFile);
waveFile.Save(targetFile);
}
/// <summary>
/// Append other wavefile instance to this instance.
/// </summary>
/// <param name="wf">Wave file.</param>
public void Append(WaveFile wf)
{
if (wf == null)
{
throw new ArgumentNullException("wf");
}
if (_riff == null)
{
Initialze();
Format = wf.Format;
}
if (!Format.Equals(wf.Format))
{
string message = string.Format(CultureInfo.InvariantCulture,
"Current format should not be different with the waveform file to append.");
throw new ArgumentException(message, "wf");
}
RiffChunk dataChunk = _riff.GetChunk(Riff.IdData);
if (dataChunk == null)
{
dataChunk = new RiffChunk();
dataChunk.Id = Riff.IdData;
_riff.Chunks.Add(dataChunk);
}
dataChunk.Append(wf.GetSoundData());
}
/// <summary>
/// Cut certain piece of data in this waveform file.
/// </summary>
/// <param name="startTime">Start time in second.</param>
/// <param name="duration">Waveform time duration in second.</param>
/// <returns>Cut wavefile.</returns>
public WaveFile Cut(double startTime, double duration)
{
if (startTime < 0.0f)
{
string message = string.Format(CultureInfo.InvariantCulture,
"The start time [{0}] of location in waveform should not be negative.",
startTime);
throw new ArgumentException(message);
}
if (duration <= 0.0f)
{
string message = string.Format(CultureInfo.InvariantCulture,
"The duration time [{0}] of location in waveform should be greater than zero.",
duration);
throw new ArgumentException(message);
}
WaveFile wf = new WaveFile();
wf.Riff = DoCut(startTime, duration);
return wf;
}
/// <summary>
/// Merge two waveform files into 2-channel waveform file.
/// </summary>
/// <param name="leftFile">Left waveform file for left channel, i.e. first channel.</param>
/// <param name="rightFile">Right waveform file for left channel, i.e. second channel.</param>
/// <returns>Merged waveform file.</returns>
public static WaveFile MergeTwoChannels(WaveFile leftFile, WaveFile rightFile)
{
if (leftFile == null)
{
throw new ArgumentNullException("leftFile");
}
if (rightFile == null)
{
throw new ArgumentNullException("rightFile");
}
if (leftFile.Format != rightFile.Format)
{
string message = string.Format(CultureInfo.InvariantCulture,
"Both waveform files should share the same formant.");
throw new InvalidDataException(message);
}
if (leftFile.GetSoundData().Length != rightFile.GetSoundData().Length)
{
string message = string.Format(CultureInfo.InvariantCulture,
"Both waveform files should have the same samples.");
throw new InvalidDataException(message);
}
if (leftFile.Format.Channels != 1)
{
string message = string.Format(CultureInfo.InvariantCulture,
"Only single channel waveform file is supported to merge.");
throw new InvalidDataException(message);
}
WaveFile targetFile = new WaveFile();
WaveFormat format = leftFile.Format;
format.Channels = 2;
format.AverageBytesPerSecond *= format.Channels;
format.BlockAlign *= format.Channels;
targetFile.Format = format;
byte[] data = new byte[leftFile.GetSoundData().Length * format.Channels];
for (int i = 0; i < leftFile.GetSoundData().Length; i += leftFile.Format.BlockAlign)
{
Buffer.BlockCopy(leftFile.GetSoundData(), i,
data, i * format.Channels, leftFile.Format.BlockAlign);
Buffer.BlockCopy(rightFile.GetSoundData(), i,
data, (i * format.Channels) + leftFile.Format.BlockAlign, leftFile.Format.BlockAlign);
}
RiffChunk chunk = targetFile.Riff.GetChunk(Riff.IdData);
chunk.SetData(data);
return targetFile;
}
/// <summary>
/// Split a 2-channel waveform file into two waveform file.
/// </summary>
/// <param name="waveFile">Source 2-channel waveform file instance.</param>
/// <returns>2 waveform files in the collection.</returns>
public static WaveFile[] SplitIntoTwoChannels(WaveFile waveFile)
{
if (waveFile == null)
{
throw new ArgumentNullException("waveFile");
}
if (waveFile.Format.Channels != 2)
{
string message = string.Format(CultureInfo.InvariantCulture,
"Only support split two channels waveform files.");
throw new NotSupportedException(message);
}
WaveFormat targetFormat = new WaveFormat();
targetFormat = waveFile.Format;
targetFormat.Channels = 1;
targetFormat.BlockAlign /= waveFile.Format.Channels;
targetFormat.AverageBytesPerSecond /= waveFile.Format.Channels;
byte[][] channels = waveFile.SplitChannels();
if (channels.Length != 2)
{
string message = string.Format(CultureInfo.InvariantCulture,
"Invalid channel number [{0}] found for splitting [{1}], which should equal to 2.",
channels.Length, waveFile.FilePath);
throw new InvalidDataException(message);
}
WaveFile[] files = new WaveFile[waveFile.Format.Channels];
files[0] = new WaveFile();
files[0].Format = targetFormat;
RiffChunk firstChannelWaveDataChunk = files[0].Riff.GetChunk(Riff.IdData);
firstChannelWaveDataChunk.SetData(channels[0]);
files[1] = new WaveFile();
files[1].Format = targetFormat;
RiffChunk secondChannelWaveDataChunk = files[1].Riff.GetChunk(Riff.IdData);
secondChannelWaveDataChunk.SetData(channels[1]);
return files;
}
/// <summary>
/// Build silence waveform file.
/// </summary>
/// <param name="silenceDuration">Silence duration.</param>
/// <returns>Silence waveform file path.</returns>
private static WaveFile BuildSilenceWaveFile(float silenceDuration)
{
WaveFile wf = new WaveFile();
WaveFormat fmt = new WaveFormat();
fmt.Channels = 1;
fmt.BlockAlign = 2;
fmt.BitsPerSample = 16;
fmt.ExtSize = 0;
fmt.FormatTag = WaveFormatTag.Pcm;
fmt.SamplesPerSecond = 16000;
fmt.AverageBytesPerSecond = 32000;
wf.Format = fmt;
RiffChunk wave = wf.Riff.GetChunk(Riff.IdData);
int sampleCount = (int)(silenceDuration * fmt.AverageBytesPerSecond);
sampleCount -= sampleCount % 2; // align
wave.SetData(new byte[sampleCount]);
wave.Size = wave.GetData().Length;
return wf;
}
/// <summary>
/// Loads head and tail margins for candidates of all sentences.
/// </summary>
/// <param name="waveDir">Wave directory.</param>
/// <param name="marginLength">Cross correlation margin length in millisecond.</param>
public void LoadMargin(string waveDir, int marginLength)
{
foreach (string sid in _idKeyedSentences.Keys)
{
string waveName = FileListMap.BuildPath(FileListMap, waveDir, sid, FileExtensions.Waveform);
if (!File.Exists(waveName))
{
throw new FileNotFoundException(Helper.NeutralFormat("Wave file is not found \"{0}\".", waveName));
}
WaveFile wave = new WaveFile();
wave.Load(waveName);
_idKeyedSentences[sid].LoadMargin(wave, marginLength);
}
}
/// <summary>
/// Extract lpc residual error.
/// </summary>
/// <param name="args">Arguments: wave file, lpc file, lpc error file.</param>
/// <param name="logWriter">LogWriter to implement parallel computing interface.</param>
/// <exception cref="ArgumentException">Exception.</exception>
public static void ExtractLpcResidualErrorOneFile(string[] args, TextWriter logWriter)
{
// check arguments
if (args.Length < 3)
{
throw new ArgumentException("Arguments for ExtractLpcResidualErrorOneFile: input wave file, input lpc file, output lpc error file");
}
// check input and output file
string wavePath = args[0];
string lpcFile = args[1];
string errorFile = args[2];
int frameShift = int.Parse(args[3]);
int frameLength = int.Parse(args[4]);
// output <zeroCrossing energy autoCorrelation>
List<double[]> lpcData = new List<double[]>();
foreach (string line in Helper.FileLines(lpcFile))
{
string[] fields = line.Split(new[] { ' ' }, StringSplitOptions.RemoveEmptyEntries);
double[] data = fields.Select(i => double.Parse(i, CultureInfo.InvariantCulture)).ToArray();
lpcData.Add(data);
}
using (StreamWriter sw = new StreamWriter(errorFile, false))
{
// load wave
WaveFile waveFile = new WaveFile();
waveFile.Load(wavePath);
short[] waveData = ArrayHelper.BinaryConvertArray(waveFile.GetSoundData());
// calculate residual error
for (int i = 0; i < lpcData.Count; i++)
{
int pos = (i + 1) * frameShift;
int nbegin = pos - (frameLength / 2);
int nend = pos + (frameLength / 2);
double energy = 0;
// calculate actual value
if (nend <= waveData.Length && nbegin >= 0)
{
for (int j = nbegin; j < nend; j++)
{
energy += waveData[j] * waveData[j];
}
energy = energy / (double)frameLength;
double tempt_energy = energy;
energy = 10 * Math.Log(Minimum + energy);
// calculate prediction value
double prediction = 0;
for (int k = 0; k < LpcOrder; k++)
{
double denergy = 0;
for (int j = nbegin; j < nend; j++)
{
if (j - k > 0)
{
denergy += waveData[j] * waveData[j - k];
}
}
prediction += lpcData[i][k] * (denergy / (double)frameLength);
}
prediction = prediction + tempt_energy;
prediction = 10 * Math.Log(Math.Abs(prediction) + Minimum);
// output residual error
sw.WriteLine("{0:F6} {1:F6}", lpcData[i][0], energy - prediction);
}
}
}
}
/// <summary>
/// Loads head and tail margins for each candidates.
/// </summary>
/// <param name="wave">WaveFile from which to load wave data.</param>
/// <param name="marginLength">Cross correlation margin length in millisecond.</param>
public void LoadMargin(WaveFile wave, int marginLength)
{
foreach (UnitCandidate candidate in Candidates)
{
candidate.LoadMargin(wave, marginLength);
}
}
/// <summary>
/// Reset.
/// </summary>
public void Reset()
{
_waveFile = null;
_waveformView.Reset();
_horScaleBar.Reset();
Invalidate();
}
/// <summary>
/// Create a visual wave instance from the wave stream.
/// </summary>
/// <param name="waveStream">Stream.</param>
/// <returns>VisualWaveForm.</returns>
public static VisualWaveForm CreateFromStream(Stream waveStream)
{
VisualWaveForm waveForm = new VisualWaveForm();
WaveFile waveFile = new WaveFile();
waveFile.Load(waveStream);
waveForm.Format = waveFile.Format;
TransactionObservableCollection<double> samples = waveForm.WaveSamples;
foreach (short sample in waveFile.DataIn16Bits)
{
samples.Add((double)sample);
}
waveForm.YAxis.Reset(samples, 0);
return waveForm;
}
/// <summary>
/// Adds a sentence into wave inventory.
/// </summary>
/// <param name="sentence">The given sentence.</param>
/// <param name="waveFileName">The corresponding wave form file name.</param>
public void Add(Sentence sentence, string waveFileName)
{
WaveFile waveFile = new WaveFile();
waveFile.Load(waveFileName);
if (waveFile.Format.SamplesPerSecond != _header.SamplesPerSecond ||
waveFile.Format.Channels != 1 ||
waveFile.Format.FormatTag != WaveFormatTag.Pcm)
{
throw new NotSupportedException(Helper.NeutralFormat(
"The waveform format of file [{0}] is not supported.", waveFileName));
}
try
{
Add(sentence, waveFile);
}
catch (InvalidDataException e)
{
throw new InvalidDataException(Helper.NeutralFormat("It fails to process the file [{0}].", waveFileName), e);
}
}
/// <summary>
/// Loads wave margin for the candidate.
/// </summary>
/// <param name="wave">WaveFile from which to load the data.</param>
/// <param name="marginLength">Cross correlation margin length in millisecond.</param>
public void LoadMargin(WaveFile wave, int marginLength)
{
if (Id != InvalidId)
{
double durationInSecond = marginLength * 0.001;
if (StartTimeInSecond - durationInSecond < 0 ||
wave.Duration < StartTimeInSecond + durationInSecond ||
EndTimeInSecond - (durationInSecond / 2) < 0 ||
wave.Duration < EndTimeInSecond + (durationInSecond / 2))
{
throw new InvalidDataException("Wave duration is shorter than expected duration of margin");
}
HeadMargin = wave.Cut(StartTimeInSecond - durationInSecond, durationInSecond * 2).DataIn16Bits;
TailMargin = wave.Cut(EndTimeInSecond - (durationInSecond / 2), durationInSecond).DataIn16Bits;
int headSampleCount = (int)(durationInSecond * 2 * wave.Format.SamplesPerSecond);
if (headSampleCount != HeadMargin.Length || headSampleCount != TailMargin.Length * 2)
{
throw new InvalidDataException("Margin data is not correctly generated");
}
}
}
/// <summary>
/// Writes the left margin if possible.
/// </summary>
/// <param name="waveFile">The given wave file where the current candidate belongs to.</param>
/// <param name="candidate">The current candidate.</param>
/// <param name="candidateInfo">The candidate information of the current candidate.</param>
private void WriteLeftMargin(WaveFile waveFile, UnitCandidate candidate, WaveCandidateInfo candidateInfo)
{
if (_ccMarginLength + _fsMarginLength > 0)
{
int leftMarginLength = _ccMarginLength + _fsMarginLength;
int waveSampleOffsetInSentence = (int)((candidate.StartTimeInSecond * waveFile.Format.SamplesPerSecond) + 0.5f);
// Left margin section.
if (candidate.Index == 0)
{
// It means the candidate is the first one, there is no previous candidate. So, writes some zero as margin.
WriteZeroMargin(leftMarginLength);
}
else if (candidate.Sentence.Candidates[candidate.Index - 1].Id == UnitCandidate.InvalidId)
{
// There is a previous candidate and it isn't in the inventory. So, writes the previous candidate as margin.
int offset = (int)(waveSampleOffsetInSentence - leftMarginLength);
int count = leftMarginLength;
if (offset < 0)
{
// The margin is longer than the previous candidate, uses zero to fill them.
WriteZeroMargin(-offset);
count += offset;
offset = 0;
}
WriteIntoInventory(ConvertsWaveDataFormat(waveFile, offset, count));
}
}
}
/// <summary>
/// Reset.
/// </summary>
public void Reset()
{
_waveFile = null;
_timeMarks.Clear();
_zoomX = 1.0f;
_positionRatioX = 0;
_viewSampleOffset = 0;
_viewSampleLength = 0;
Invalidate();
}
/// <summary>
/// Converts the wave data into proper format.
/// </summary>
/// <param name="waveFile">The given WaveFile object in which the data will be converted.</param>
/// <param name="offset">The offset in sample count of the data will be converted.</param>
/// <param name="count">The count in sample count of the data will be converted.</param>
/// <returns>Waveform data in supported format of voice font.</returns>
private byte[] ConvertsWaveDataFormat(WaveFile waveFile, int offset, int count)
{
Debug.Assert(waveFile.Format.FormatTag == WaveFormatTag.Pcm, "The source format tag should be PCM.");
byte[] data = new byte[count * _header.BytesPerSample];
// Format conversion.
if (_header.FormatCategory == WaveFormatTag.Pcm)
{
if (waveFile.Format.BitsPerSample == _header.BytesPerSample * 8)
{
offset *= _header.BytesPerSample;
count *= _header.BytesPerSample;
Array.Copy(waveFile.GetSoundData(), offset, data, 0, count);
}
else if (_header.BytesPerSample == 1)
{
short[] dataIn16Bits = waveFile.DataIn16Bits;
for (int i = 0; i < data.Length; ++i)
{
data[i] = (byte)((dataIn16Bits[i + offset] / 256) + 128); // Convert 16-bit to 8-bit.
}
}
else if (_header.BytesPerSample == 2)
{
throw new NotSupportedException("It is unsupported to convert 8-bit to 16-bit");
}
}
else if (_header.FormatCategory == WaveFormatTag.Mulaw)
{
Debug.Assert(_header.SamplesPerSecond == 8000, "Only supports 8k Hz for mulaw voice.");
Debug.Assert(_header.BytesPerSample == 1, "Only supports 1 byte per sample for mulaw voice.");
Debug.Assert(_header.Compression == WaveCompressCatalog.Unc, "Only supports uncompress encoding for mulaw voice.");
if (waveFile.Format.SamplesPerSecond != 8000)
{
string message = Helper.NeutralFormat(
"Samples per second [{0}] of source waveform file should be the same with that [{1}] of target voice.",
waveFile.Format.SamplesPerSecond, _header.SamplesPerSecond);
throw new InvalidDataException(message);
}
if (waveFile.Format.BitsPerSample != 16 || waveFile.Format.BlockAlign != 2)
{
string message = Helper.NeutralFormat(
"Only supports 16 bits per sample and 2 bytes alignment, while that of source waveform file is [{0}] and [{1}].",
waveFile.Format.BitsPerSample, waveFile.Format.BlockAlign);
throw new InvalidDataException(message);
}
// Converts 16bits PCM samples to 8 bits Mulaw samples
short[] soundData = waveFile.DataIn16Bits;
for (int i = 0; i < count; i++)
{
data[i] = SampleConverter.LinearToUlaw(soundData[offset + i]);
}
}
else
{
// Bug #70735 is filed to track: Currently, Compress is not supported in RUS offline inventory building.
throw new NotSupportedException(
Helper.NeutralFormat("Unsupported target format [{0}].", _header.FormatCategory));
}
return data;
}
/// <summary>
/// Load a waveform file from file.
/// </summary>
/// <param name="filePath">Waveform file to load from.</param>
/// <returns>WaveFile.</returns>
public static WaveFile ReadWaveFile(string filePath)
{
WaveFile waveFile = new WaveFile();
waveFile.Load(filePath);
return waveFile;
}