Class buffer

src/tests/buffer.h:74–1275

/*@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@*/
template <class T>
class buffer {
private:
	// we need to save the requested length x, because
	// if we change the buffer from complex to real,
	// (as in a round-trip test) we need to be able to
	// get back to the original length of x. in the case
	// of an odd transform length, that's not possible
	// due to round-off error unless we explicitly save it
	size_t _requested_length_x;
	size_t _number_of_dimensions;
	size_t _batch_size;
	size_t _distance;
	layout::buffer_layout_t _layout;
	clfftResultLocation _placeness;

	std::vector< size_t > _lengths;
	std::vector< size_t > _strides;
	bool _tightly_packed_strides;
	bool _tightly_packed_distance;

	static const size_t tightly_packed = 0;

	// if real or planar:
	// _the_buffers[re] will hold the real portion
	// _the_buffers[im] will hold the imaginary portion (planar only)
	// if interleaved:
	// _the_buffers[interleaved] will hold the whole banana
	std::vector< buffer_memory< T > > _the_buffers;

	enum
	{
		interleaved = 0,
		re = 0, // real
		im = 1 // imaginary
	};

public:
	/*****************************************************/
	buffer( const size_t dimensions_in,
			const size_t* lengths_in,
			const size_t* strides_in,
			const size_t batch_size_in,
			const size_t distance_in,
			const layout::buffer_layout_t layout_in,
			const clfftResultLocation placeness_in
		  )
		: _number_of_dimensions( dimensions_in )
		, _batch_size( batch_size_in )
		, _distance( distance_in )
		, _layout( layout_in )
		, _placeness( placeness_in )
		, _lengths()
		, _strides()
		, _the_buffers()
	{
		initialize_lengths(lengths_in);
		initialize_strides(strides_in);
		initialize_distance(distance_in);