Spectrum Brands MC.31XX manual Programming

Programming Standard acquisition modes

Example for SpcGetData, no memory allocation error checking performed:

for (i = 0; i <		2; i++)			// both		memory channels have been			used
pnData[i] =		(ptr16) malloc (lMemsize * lBytesPerSample);			// allocate			memory for the data pointers
					// with		the	maximum	size (lMemsize)
SpcGetData	(hDrv,		0,	0, lMemsize, (dataptr) pnData[0]);	//	no demultiplexing is necessary				on channel 0
SpcGetData	(hDrv,		1,	0, lMemsize, (dataptr) pnData[1]);	//	neither it is on			channel 1

If you use two channels for recording using only one memory channel or four channels, the data in the memory channel(s) is multiplexed and needs to be unsorted by the user. The following example shows how to unsort the data for the recording of two channels using memory chan- nel 0.

for (i = 0; i < 2; i++)	// 2 channels to read out from 1 memory channel
pnData[i] = (ptr16) malloc (lMemsize * lBytesPerSample);	// allocate	memory for the data pointers
	// with the	maximum size (lMemsize) per channel
pnTmp = (ptr16) malloc (lMemsize * 2 * lBytesPerSample);	// allocate	temporary buffer for copy
SpcGetData (hDrv, 0, 0, 2 * lMemsize, (dataptr) pnTmp);	// get both	channels together
	// from memory channel 0
for (i = 0; i < lMemsize; i++)	// split data in the two channels
{
pnData[0][i] = pnTmp[(2 * i)];
pnData[1][i] = pnTmp[(2 * i) + 1];
}
free (pnTmp);	// free the	temporary buffer

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