Chris@7: "use strict";
Chris@7: 
Chris@7: var fftCross = Module.cwrap(
Chris@7:     'fftCross', 'void', ['number', 'number', 'number',
Chris@7: 			 'number', 'number', 'number' ]
Chris@7: );
Chris@7: 
Chris@7: function FFTCross(size) {
Chris@7:     this.size = size;
Chris@7:     this.n = size * 8;
Chris@7:     this.ptr = Module._malloc(this.n * 4);
Chris@7:     this.ri = new Uint8Array(Module.HEAPU8.buffer, this.ptr, this.n);
Chris@7:     this.ii = new Uint8Array(Module.HEAPU8.buffer, this.ptr + this.n, this.n);
Chris@7:     this.transform = function(real, imag, inverse) {
Chris@7: 	var ptr = this.ptr;
Chris@7: 	var n = this.n;
Chris@7: 	this.ri.set(new Uint8Array(real.buffer));
Chris@7: 	this.ii.set(new Uint8Array(imag.buffer));
Chris@7: 	fftCross(this.size, inverse,
Chris@7: 		 ptr, ptr + n, ptr + n * 2, ptr + n * 3);
Chris@7: 	var ro = new Float64Array(Module.HEAPU8.buffer, ptr + n * 2, this.size);
Chris@7: 	var io = new Float64Array(Module.HEAPU8.buffer, ptr + n * 3, this.size);
Chris@7: 	return { real: ro, imag: io };
Chris@7:     }
Chris@7:     this.transformReal = function(real, inverse) {
Chris@7: 	var ptr = this.ptr;
Chris@7: 	var n = this.n;
Chris@7: 	this.ri.set(new Uint8Array(real.buffer));
Chris@7: 	fftCross(this.size, inverse,
Chris@7: 		 ptr, 0, ptr + n * 2, ptr + n * 3);
Chris@7: 	var ro = new Float64Array(Module.HEAPU8.buffer, ptr + n * 2, this.size);
Chris@7: 	var io = new Float64Array(Module.HEAPU8.buffer, ptr + n * 3, this.size);
Chris@7: 	return { real: ro, imag: io };
Chris@7:     }
Chris@7:     this.discard = function() {
Chris@7: 	Module._free(this.ptr);
Chris@7:     }
Chris@7: }
Chris@7: