Method read

examples/TinyAudio/b3ReadWavFile.cpp:277–492

}

bool b3ReadWavFile::read(unsigned long startFrame, bool doNormalize)
{
	// Make sure we have an open file.
	if (fd_ == 0)
	{
		//    oStream_ << "FileRead::read: a file is not open!";
		//    Stk::handleError( StkError::WARNING ); return;
		return false;
	}

	// Check the m_frames size.
	unsigned long nFrames = this->m_numFrames;  //m_frames.frames();
	if (nFrames == 0)
	{
		//    oStream_ << "FileRead::read: StkFrames m_frames size is zero ... no data read!";
		//    Stk::handleError( StkError::WARNING );
		return false;
	}

	if (startFrame >= m_numFrames)
	{
		return false;
		//oStream_ << "FileRead::read: startFrame argument is greater than or equal to the file size!";
		//Stk::handleError( StkError::FUNCTION_ARGUMENT );
	}

	// Check for file end.
	if (startFrame + nFrames > m_numFrames)
		nFrames = m_numFrames - startFrame;

	long i, nSamples = (long)(nFrames * channels_);
	unsigned long offset = startFrame * channels_;

	// Read samples into StkFrames data m_frames.
	if (dataType_ == B3_SINT16)
	{
		signed short int *buf = (signed short int *)&m_frames[0];
		if (fseek(fd_, dataOffset_ + (offset * 2), SEEK_SET) == -1)
			return false;
		if (fread(buf, nSamples * 2, 1, fd_) != 1)
			return false;
		if (byteswap_)
		{
			signed short int *ptr = buf;
			for (i = nSamples - 1; i >= 0; i--)
				b3Swap16((unsigned char *)ptr++);
		}
		if (doNormalize)
		{
			double gain = 1.0 / 32768.0;
			for (i = nSamples - 1; i >= 0; i--)
				m_frames[i] = buf[i] * gain;
		}
		else
		{
			for (i = nSamples - 1; i >= 0; i--)
				m_frames[i] = buf[i];
		}