20  *

    20  *

    21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    22  * or visit www.oracle.com if you need additional information or have any

    22  * or visit www.oracle.com if you need additional information or have any

    23  * questions.

    23  * questions.

    24  */

    24  */

    25 package com.sun.media.sound;

    26 package com.sun.media.sound;

    26 

    27 

    27 /**

    28 /**

    28  * Fast Fourier Transformer.

    29  * Fast Fourier Transformer.

    29  *

    30  *

   586             }

   587             }

   587 

   588 

   588             i += jmax << 1;

   589             i += jmax << 1;

   589 

   590 

   590         }

   591         }

   592     }

   592     }

   593 

   593 

   594     // Perform Factor-4 Decomposition with 3 * complex operators and 8 +/-

   594     // Perform Factor-4 Decomposition with 3 * complex operators and 8 +/-

   595     // complex operators

   595     // complex operators

   596     private static void calcF4IE(int fftFrameSize, double[] data, int i,

   596     private static void calcF4IE(int fftFrameSize, double[] data, int i,

   680             }

   680             }

   681 

   681 

   682             i += jmax << 1;

   682             i += jmax << 1;

   683 

   683 

   684         }

   684         }

   686     }

   685     }

   687 

   686 

   688     private void bitreversal(double[] data) {

   687     private void bitreversal(double[] data) {

   689         if (fftFrameSize < 4)

   688         if (fftFrameSize < 4)

   690             return;

   689             return;

   741             m++;

   740             m++;

   742             double tempi = data[n];

   741             double tempi = data[n];

   743             data[n] = data[m];

   742             data[n] = data[m];

   744             data[m] = tempi;

   743             data[m] = tempi;

   745         }

   744         }

   747     }

   745     }

   748 }

   746 }