public bool AppendFile(WavFile wavFile)
{
var flag = true;
switch (DataSize)
{
case 0:
InitializeFromFile(wavFile);
break;
default:
flag &= AppendNewData(wavFile);
break;
}
flag &= WriteToFile();
return flag;
}
private static bool CheckMergedSampleDuration(string filePath )
{
var file = new WavFile(filePath);
return file.Duration > 10;
}
private string MergeSamples()
{
var mergedFilePath = _storagePath + TmpPath + _fileName + ".wav";
var mergedFile = new WavFile(mergedFilePath);
if (_samplePaths != null)
{
//_samplePaths.ForEach(samplePath => mergedFile.AppendFile(new WavFile(samplePath)));
if (_samplePaths.Select(samplePath => mergedFile.AppendFile(new WavFile(samplePath))).Any(flag => !flag))
{
Log.Error(ThreadTag, "Merge failed.");
return null;
}
if (System.IO.File.Exists(mergedFilePath)) return mergedFilePath;
Log.Error(ThreadTag, "Merged file does not exist after file merge.");
return null;
}
Log.Error(ThreadTag, "_samplePaths was null in MergeSamples");
return null;
}
private void InitializeFromFile(WavFile wavFile)
{
ChunkId = wavFile.ChunkId;
FileSize = wavFile.FileSize;
RiffType = wavFile.RiffType;
FmtId = wavFile.FmtId;
FmtSize = wavFile.FmtSize;
FmtCode = wavFile.FmtCode;
Channels = wavFile.Channels;
SampleRate = wavFile.SampleRate;
FmtAvgBps = wavFile.FmtAvgBps;
FmtBlockAlign = wavFile.FmtBlockAlign;
BitDepth = wavFile.BitDepth;
FmtExtraSize = wavFile.FmtExtraSize;
DataId = wavFile.DataId;
DataSize = wavFile.DataSize;
Data = wavFile.Data;
}
private bool HasSameHeader(WavFile wavFile)
{
return (ChunkId.SequenceEqual(wavFile.ChunkId) &&
RiffType.SequenceEqual(wavFile.RiffType) &&
FmtId.SequenceEqual(wavFile.FmtId) &&
FmtSize == wavFile.FmtSize &&
FmtCode == wavFile.FmtCode &&
Channels == wavFile.Channels &&
SampleRate == wavFile.SampleRate &&
FmtAvgBps == wavFile.FmtAvgBps &&
FmtBlockAlign == wavFile.FmtBlockAlign &&
BitDepth == wavFile.BitDepth &&
FmtExtraSize == wavFile.FmtExtraSize &&
DataId.SequenceEqual(wavFile.DataId));
}
private bool AppendNewData(WavFile wavFile)
{
if (!HasSameHeader(wavFile))
{
Log.Error("WAVFile", "Not able to append, different headers.");
return false;
}
if (wavFile.DataSize == 0)
{
Log.Error(Tag, "trying to add empty wav file.");
return false;
}
var newDataSize = DataSize + wavFile.DataSize;
var tmp = new byte[newDataSize];
for (var i = 0; i < newDataSize; i++)
{
if (i < DataSize)
tmp[i] = Data[i];
else
tmp[i] = wavFile.Data[i-DataSize];
}
Data = tmp;
DataSize = newDataSize;
FileSize += wavFile.DataSize;
return true;
}
private static bool CheckMergedSampleDuration(string filePath)
{
var file = new WavFile(filePath);
Log.Debug(ThreadTag, "Duration of sample: " + file.Duration);
return file.Duration > MinSampleDuration;
}