Chris@6: "use strict";
Chris@5: 
Chris@5: document.write("<p>start</p>");
Chris@5: 
Chris@6: var fftCross = Module.cwrap(
Chris@5:     'fftCross', 'void', ['number', 'number', 'number', 'number', 'number', 'number' ]
Chris@5: );
Chris@5: 
Chris@6: function FFTCross(size) {
Chris@6:     this.size = size;
Chris@6:     this.n = size * 8;
Chris@6:     this.ptr = Module._malloc(this.n * 4);
Chris@6:     this.ri = new Uint8Array(Module.HEAPU8.buffer, this.ptr, this.n);
Chris@6:     this.ii = new Uint8Array(Module.HEAPU8.buffer, this.ptr + this.n, this.n);
Chris@6:     this.transform = function(real, imag, inverse) {
Chris@6: 	var ptr = this.ptr;
Chris@6: 	var n = this.n;
Chris@6: 	this.ri.set(new Uint8Array(real.buffer));
Chris@6: 	this.ii.set(new Uint8Array(imag.buffer));
Chris@6: 	fftCross(this.size, inverse,
Chris@6: 		 ptr, ptr + n, ptr + n * 2, ptr + n * 3);
Chris@6: 	var ro = new Float64Array(Module.HEAPU8.buffer,
Chris@6: 				  ptr + n * 2, this.size);
Chris@6: 	var io = new Float64Array(Module.HEAPU8.buffer,
Chris@6: 				  ptr + n * 2, this.size);
Chris@6: 	return { real: ro, imag: io };
Chris@6:     }
Chris@6:     this.discard = function() {
Chris@6: 	Module._free(this.ptr);
Chris@6:     }
Chris@6: }
Chris@6: 
Chris@6: var f = new FFTCross(8);
Chris@6: var real = new Float64Array([1,1,1,1,1,1,1,1]);
Chris@6: var imag = new Float64Array([0,0,0,0,0,0,0,0]);
Chris@6: var out = f.transform(real, imag, false);
Chris@5: document.write("output: ");
Chris@5: for (var i = 0; i < 8; ++i) {
Chris@6:     document.write(out.real[i] + "," + out.imag[i] + " ");
Chris@5: }
Chris@5: 
Chris@5: 
Chris@5: document.write("<p>end</p>");