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-
-/* -----------------------------------------------------------------------------------------------------------
-Software License for The Fraunhofer FDK AAC Codec Library for Android
-
-© Copyright  1995 - 2013 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
-  All rights reserved.
-
- 1.    INTRODUCTION
-The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software that implements
-the MPEG Advanced Audio Coding ("AAC") encoding and decoding scheme for digital audio.
-This FDK AAC Codec software is intended to be used on a wide variety of Android devices.
-
-AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient general perceptual
-audio codecs. AAC-ELD is considered the best-performing full-bandwidth communications codec by
-independent studies and is widely deployed. AAC has been standardized by ISO and IEC as part
-of the MPEG specifications.
-
-Patent licenses for necessary patent claims for the FDK AAC Codec (including those of Fraunhofer)
-may be obtained through Via Licensing (www.vialicensing.com) or through the respective patent owners
-individually for the purpose of encoding or decoding bit streams in products that are compliant with
-the ISO/IEC MPEG audio standards. Please note that most manufacturers of Android devices already license
-these patent claims through Via Licensing or directly from the patent owners, and therefore FDK AAC Codec
-software may already be covered under those patent licenses when it is used for those licensed purposes only.
-
-Commercially-licensed AAC software libraries, including floating-point versions with enhanced sound quality,
-are also available from Fraunhofer. Users are encouraged to check the Fraunhofer website for additional
-applications information and documentation.
-
-2.    COPYRIGHT LICENSE
-
-Redistribution and use in source and binary forms, with or without modification, are permitted without
-payment of copyright license fees provided that you satisfy the following conditions:
-
-You must retain the complete text of this software license in redistributions of the FDK AAC Codec or
-your modifications thereto in source code form.
-
-You must retain the complete text of this software license in the documentation and/or other materials
-provided with redistributions of the FDK AAC Codec or your modifications thereto in binary form.
-You must make available free of charge copies of the complete source code of the FDK AAC Codec and your
-modifications thereto to recipients of copies in binary form.
-
-The name of Fraunhofer may not be used to endorse or promote products derived from this library without
-prior written permission.
-
-You may not charge copyright license fees for anyone to use, copy or distribute the FDK AAC Codec
-software or your modifications thereto.
-
-Your modified versions of the FDK AAC Codec must carry prominent notices stating that you changed the software
-and the date of any change. For modified versions of the FDK AAC Codec, the term
-"Fraunhofer FDK AAC Codec Library for Android" must be replaced by the term
-"Third-Party Modified Version of the Fraunhofer FDK AAC Codec Library for Android."
-
-3.    NO PATENT LICENSE
-
-NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without limitation the patents of Fraunhofer,
-ARE GRANTED BY THIS SOFTWARE LICENSE. Fraunhofer provides no warranty of patent non-infringement with
-respect to this software.
-
-You may use this FDK AAC Codec software or modifications thereto only for purposes that are authorized
-by appropriate patent licenses.
-
-4.    DISCLAIMER
-
-This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright holders and contributors
-"AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, including but not limited to the implied warranties
-of merchantability and fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
-CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary, or consequential damages,
-including but not limited to procurement of substitute goods or services; loss of use, data, or profits,
-or business interruption, however caused and on any theory of liability, whether in contract, strict
-liability, or tort (including negligence), arising in any way out of the use of this software, even if
-advised of the possibility of such damage.
-
-5.    CONTACT INFORMATION
-
-Fraunhofer Institute for Integrated Circuits IIS
-Attention: Audio and Multimedia Departments - FDK AAC LL
-Am Wolfsmantel 33
-91058 Erlangen, Germany
-
-www.iis.fraunhofer.de/amm
-amm-info@iis.fraunhofer.de
------------------------------------------------------------------------------------------------------------ */
-
-/******************************** MPEG Audio Encoder **************************
-
-   Initial author:       M. Werner
-   contents/description: Chaos measure calculation
-
-******************************************************************************/
-
-#include "chaosmeasure.h"
-
-/*****************************************************************************
-    functionname: FDKaacEnc_FDKaacEnc_CalculateChaosMeasurePeakFast
-    description:  Eberlein method of chaos measure calculation by high-pass
-                  filtering amplitude spectrum
-                  A special case of FDKaacEnc_CalculateChaosMeasureTonalGeneric --
-                  highly optimized
-*****************************************************************************/
-static void
-FDKaacEnc_FDKaacEnc_CalculateChaosMeasurePeakFast( FIXP_DBL  *RESTRICT paMDCTDataNM0,
-                               INT        numberOfLines,
-                               FIXP_DBL  *RESTRICT chaosMeasure )
-{
-  INT i, j;
-
-  /* calculate chaos measure by "peak filter" */
-  for (i=0; i<2; i++) {
-    /* make even and odd pass through data */
-    FIXP_DBL left,center; /* left, center tap of filter */
-
-    left   = (FIXP_DBL)((LONG)paMDCTDataNM0[i]^((LONG)paMDCTDataNM0[i]>>(DFRACT_BITS-1)));
-    center = (FIXP_DBL)((LONG)paMDCTDataNM0[i+2]^((LONG)paMDCTDataNM0[i+2]>>(DFRACT_BITS-1)));
-
-    for (j = i+2; j < numberOfLines - 2; j+=2) {
-      FIXP_DBL right = (FIXP_DBL)((LONG)paMDCTDataNM0[j+2]^((LONG)paMDCTDataNM0[j+2]>>(DFRACT_BITS-1)));
-      FIXP_DBL tmp = (left>>1)+(right>>1);
-
-      if (tmp < center ) {
-         INT leadingBits = CntLeadingZeros(center)-1;
-         tmp = schur_div(tmp<<leadingBits, center<<leadingBits, 8);
-         chaosMeasure[j] = fMult(tmp,tmp);
-      }
-      else {
-         chaosMeasure[j] = (FIXP_DBL)MAXVAL_DBL;
-      }
-
-      left   = center;
-      center = right;
-    }
-  }
-
-  /* provide chaos measure for first few lines */
-  chaosMeasure[0] = chaosMeasure[2];
-  chaosMeasure[1] = chaosMeasure[2];
-
-  /* provide chaos measure for last few lines */
-  for (i = (numberOfLines-3); i < numberOfLines; i++)
-    chaosMeasure[i] = FL2FXCONST_DBL(0.5);
-}
-
-
-/*****************************************************************************
-    functionname: FDKaacEnc_CalculateChaosMeasure
-    description:  calculates a chaosmeasure for every line, different methods
-                  are available. 0 means tonal, 1 means noiselike
-    returns:
-    input:        MDCT data, number of lines
-    output:       chaosMeasure
-*****************************************************************************/
-void
-FDKaacEnc_CalculateChaosMeasure( FIXP_DBL    *paMDCTDataNM0,
-                       INT          numberOfLines,
-                       FIXP_DBL    *chaosMeasure )
-
-{
-    FDKaacEnc_FDKaacEnc_CalculateChaosMeasurePeakFast( paMDCTDataNM0,
-                                   numberOfLines,
-                                   chaosMeasure );
-}
-