Work/sample/hold/WAVE.CPP

#include <sample/wave.hpp>
#include <common/memfile.hpp>
#include <common/openfile.hpp>

WaveForm::WaveForm(String wavePathFileName)
{
  initWaveForm();
	wavePathFileName.lower();
	if(!wavePathFileName.strstr(mExtensionString))wavePathFileName+=mExtensionString;
	mWavePathFileName=wavePathFileName;
  FileHandle waveFile(wavePathFileName,FileHandle::Read,FileHandle::ShareReadWrite);
	if(!waveFile.isOkay())return;
	waveFile.read((BYTE*)&mHeaderString,sizeof(mHeaderString));
	waveFile.read((BYTE*)&mLengthData,sizeof(mLengthData));
	waveFile.read((BYTE*)&mSubHeaderString,sizeof(mSubHeaderString));
	mFormatChunk<<waveFile;
	while(TRUE)
	{
		ChunkID chunkID;
		chunkID<<waveFile;
		waveFile.seek(-chunkID.size(),FileHandle::SeekCurrent);
		if(chunkID==String("data")){mDataChunk<<waveFile;break;}
		mGenericChunks.insert(&GenericChunk());
    mGenericChunks[mGenericChunks.size()-1]<<waveFile;
  }
	mSampleData.numSamples(mDataChunk.length());
	mSampleData<<waveFile;
	waveFile.close();
}

WaveForm WaveForm::operator+(const WaveForm &someWaveForm)
{
	WaveForm waveForm(*this);
	waveForm+=someWaveForm;
	return waveForm;
}

WaveForm &WaveForm::operator=(const WaveForm &someWaveForm)
{
	initWaveForm();
	mLengthData=someWaveForm.mLengthData;
	mFormatChunk=someWaveForm.mFormatChunk;
	mDataChunk=someWaveForm.mDataChunk;
	mSampleData=someWaveForm.mSampleData;
  return *this;
}

WaveForm &WaveForm::operator+=(const WaveForm &someWaveForm)
{
	if(mLengthData<someWaveForm.mLengthData)
	{
		mLengthData=someWaveForm.mLengthData;
		mFormatChunk=someWaveForm.mFormatChunk;
		mDataChunk=someWaveForm.mDataChunk;
	}
  mSampleData+=someWaveForm.mSampleData;
  return *this;
}

bool WaveForm::operator==(const WaveForm &/*someWaveForm*/)const
{
	return FALSE;
}

bool WaveForm::operator<<(FileHandle &waveFile)
{
  if(!waveFile.isOkay())return FALSE;
  initWaveForm();
	waveFile.read((BYTE*)&mHeaderString,sizeof(mHeaderString));
	waveFile.read((BYTE*)&mLengthData,sizeof(mLengthData));
	waveFile.read((BYTE*)&mSubHeaderString,sizeof(mSubHeaderString));
	mFormatChunk<<waveFile;
	while(TRUE)
	{
		ChunkID chunkID;
		chunkID<<waveFile;
		waveFile.seek(-chunkID.size(),FileHandle::SeekCurrent);
		if(chunkID==String("data")){mDataChunk<<waveFile;break;}
		mGenericChunks.insert(&GenericChunk());
    mGenericChunks[mGenericChunks.size()-1]<<waveFile;
  }
	mSampleData.numSamples(mDataChunk.length());
	mSampleData<<waveFile;
	return TRUE;
}

void WaveForm::initWaveForm(void)
{
	mLengthData=0;
	mExtensionString=".wav";
	mWaveString="WAVE";
	mRiffString="RIFF";
	::memcpy(mHeaderString,mRiffString,mRiffString.length());
	::memcpy(mSubHeaderString,mWaveString,mWaveString.length());
}

bool WaveForm::save(String wavePathFileName)
{
	DWORD waveFileLength((long)sizeof(mHeaderString)+(long)sizeof(mLengthData)+(long)sizeof(mSubHeaderString)+(long)sizeof(FormatChunk)+(long)sizeof(DataChunk)+(long)mSampleData.numSamples());
	wavePathFileName.upper();
	if(!wavePathFileName.strstr(mExtensionString))wavePathFileName+=mExtensionString;
	MemFile waveFile(wavePathFileName,waveFileLength);
	mLengthData=mSampleData.numSamples()+sizeof(mSubHeaderString)+mFormatChunk.size()+mDataChunk.size();
  for(short chunkIndex=0;chunkIndex<mGenericChunks.size();chunkIndex++)mLengthData+=mGenericChunks[chunkIndex].chunkLength();
	waveFile.write((char*)&mHeaderString,sizeof(mHeaderString));
	waveFile.write((char*)&mLengthData,sizeof(mLengthData));
	waveFile.write((char*)&mSubHeaderString,sizeof(mSubHeaderString));
	mFormatChunk>>waveFile;
	mDataChunk.length(mSampleData.numSamples());
	for(chunkIndex=0;chunkIndex<mGenericChunks.size();chunkIndex++)mGenericChunks[chunkIndex]>>waveFile;
	mDataChunk>>waveFile;
  mSampleData>>waveFile;
	return waveFile.flushBuffer();
}

bool WaveForm::save(String wavePathFileName,const PureSample &somePureSample,DWORD samplesPerSecond,DWORD avgBytesPerSecond)
{
	DWORD waveFileLength((long)sizeof(mHeaderString)+(long)sizeof(mLengthData)+(long)sizeof(mSubHeaderString)+(long)sizeof(FormatChunk)+(long)sizeof(DataChunk)+(long)somePureSample.numSamples());

	wavePathFileName.upper();
	if(!wavePathFileName.strstr(mExtensionString))wavePathFileName+=mExtensionString;
	MemFile waveFile(wavePathFileName,waveFileLength);
	mLengthData=somePureSample.numSamples()+sizeof(mSubHeaderString)+mFormatChunk.size()+mDataChunk.size();
  for(short chunkIndex=0;chunkIndex<mGenericChunks.size();chunkIndex++)mLengthData+=mGenericChunks[chunkIndex].chunkLength();
	waveFile.write((char*)&mHeaderString,sizeof(mHeaderString));
	waveFile.write((char*)&mLengthData,sizeof(mLengthData));
	waveFile.write((char*)&mSubHeaderString,sizeof(mSubHeaderString));
	mFormatChunk.formatTag(FormatChunk::WaveFormatPCM);
	mFormatChunk.channels(FormatChunk::NumChannels);
	mFormatChunk.samplesPerSecond(samplesPerSecond);
	mFormatChunk.averageBytesPerSecond(avgBytesPerSecond);
	mFormatChunk.blockAlign(FormatChunk::BlockAlign);
	mFormatChunk.bitsPerSample(FormatChunk::BitsPerSample);
	mFormatChunk>>waveFile;
	mDataChunk.length(somePureSample.numSamples());
	for(chunkIndex=0;chunkIndex<mGenericChunks.size();chunkIndex++)mGenericChunks[chunkIndex]>>waveFile;
	mDataChunk>>waveFile;
  somePureSample>>waveFile;
	return waveFile.flushBuffer();
}

String WaveForm::toString(void)const
{
  String strWaveForm;

  strWaveForm+=String("<WAVEFORM>");
	strWaveForm+=String(" Header=")+String(mHeaderString).quotes();
	strWaveForm+=String(" LengthData=")+String().fromInt(mLengthData).quotes();
	strWaveForm+=String(" SubHeader=")+String(mSubHeaderString).quotes();
	strWaveForm+=String(" ")+mFormatChunk.toString();
	for(int index=0;index<mGenericChunks.size();index++)
	{
	  strWaveForm+=((Block<GenericChunk>&)mGenericChunks)[index].chunkID().toString();
	}
	strWaveForm+=mDataChunk.toString();
	strWaveForm+=mSampleData.toString();
	strWaveForm+=String(" WavePathFileName=")+mWavePathFileName.quotes();
	strWaveForm+=String(" Extension=")+mExtensionString.quotes();
	strWaveForm+=String(" WaveString=")+mWaveString.quotes();
	strWaveForm+=String(" RiffString=")+mRiffString.quotes();
	strWaveForm+=String("</WAVEFORM>");
	return strWaveForm;
}