soundsource.cpp

inline void getSamples(int64 sourceindex, float* destbuf, int nframes, int numdestchans)
	{
		  auto ptrs = m_buf.getArrayOfReadPointers();
			for (int i = 0; i < nframes; ++i)
			{
				if (sourceindex + i < m_buf.getNumSamples())
				{
					for (int j = 0; j < numdestchans; ++j)
						destbuf[i*numdestchans + j] = ptrs[j][i + sourceindex];
				}
				else
				{
					for (int j = 0; j < numdestchans; ++j)
						destbuf[i*numdestchans + j] = 0.0f;
				}
			}
		}
		if (m_fadelen > 0.0)
		{
			int flensamples = m_sr * m_fadelen;
			auto len = m_length;
			if (flensamples * 2 > len)
				flensamples = len / 2;
			for (int i = 0; i < nframes; ++i)
			{
				float gain = 1.0f;
				int64 index = sourceindex + i;
				if (index < flensamples)
					gain = 1.0f / flensamples * index;
				if (index >= len - flensamples)
					gain = 1.0f - 1.0f / flensamples * (index - (len - flensamples));
				for (int j = 0; j < numdestchans; ++j)
					destbuf[i*numdestchans + j] *= gain;
			}
		}
	}