Chris@19: "use strict";
Chris@19: 
Chris@19: var fftwModule = FFTWModule({});
Chris@19: 
Chris@19: var fftwf_plan_dft_r2c_1d = fftwModule.cwrap(
Chris@19:     'fftwf_plan_dft_r2c_1d', 'number', ['number', 'number', 'number', 'number']
Chris@19: );
Chris@19: 
Chris@19: var fftwf_plan_dft_c2r_1d = fftwModule.cwrap(
Chris@19:     'fftwf_plan_dft_c2r_1d', 'number', ['number', 'number', 'number', 'number']
Chris@19: );
Chris@19: 
Chris@19: var fftwf_execute = fftwModule.cwrap(
Chris@19:     'fftwf_execute', 'void', ['number']
Chris@19: );
Chris@19: 
Chris@19: var fftwf_destroy_plan = fftwModule.cwrap(
Chris@19:     'fftwf_destroy_plan', 'void', ['number']
Chris@19: );
Chris@19: 
Chris@19: function FFTW(size) {
Chris@19: 
Chris@19:     this.size = size;
Chris@19:     this.rptr = fftwModule._malloc(size*4 + (size+2)*4);
Chris@19:     this.cptr = this.rptr + size*4;
Chris@19:     this.r = new Float32Array(fftwModule.HEAPU8.buffer, this.rptr, size);
Chris@19:     this.c = new Float32Array(fftwModule.HEAPU8.buffer, this.cptr, size+2);
Chris@19: 
Chris@19:     var FFTW_ESTIMATE = (1 << 6);
Chris@19:     this.fplan = fftwf_plan_dft_r2c_1d(size, this.rptr, this.cptr, FFTW_ESTIMATE);
Chris@19:     this.iplan = fftwf_plan_dft_c2r_1d(size, this.cptr, this.rptr, FFTW_ESTIMATE);
Chris@19: 
Chris@19:     this.forward = function(real) {
Chris@19: 	this.r.set(real);
Chris@19: 	fftwf_execute(this.fplan);
Chris@21: 	return new Float32Array(fftwModule.HEAPU8.buffer, this.cptr, this.size+2);
Chris@19:     }
Chris@19:     
Chris@19:     this.inverse = function(cpx) {
Chris@19: 	this.c.set(cpx);
Chris@19: 	fftwf_execute(this.iplan);
Chris@21: 	return new Float32Array(fftwModule.HEAPU8.buffer, this.rptr, this.size);
Chris@19:     }
Chris@19:     
Chris@19:     this.dispose = function() {
Chris@19: 	fftwf_destroy_plan(this.fplan);
Chris@19: 	fftwf_destroy_plan(this.iplan);
Chris@19: 	fftwModule._free(this.rptr);
Chris@19:     }
Chris@19: }
Chris@19: