/* -----------------------------------------------------------------------------

Software License for The Fraunhofer FDK AAC Codec Library for Android

© Copyright  1995 - 2019 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

----------------------------------------------------------------------------- */

/**************************** SBR decoder library ******************************

   Author(s):   Matthias Hildenbrand

   Description: Decode Predictive Vector Coding Data

*******************************************************************************/

#include "pvc_dec.h"

/* PVC interal definitions */

#define PVC_DIVMODE_BITS 3

#define PVC_NSMODE_BITS 1

#define PVC_REUSEPVCID_BITS 1

#define PVC_PVCID_BITS 7

#define PVC_GRIDINFO_BITS 1

#define PVC_NQMFBAND 64

#define PVC_NBLOW 3 /* max. number of grouped QMF subbands below SBR range */

#define PVC_NTAB1 3

#define PVC_NTAB2 128

#define PVC_ID_NBIT 7

/* Exponent of pPvcStaticData->Esg and predictedEsg in dB domain.

   max(Esg) = 10*log10(2^15*2^15) = 90.30;

   min(Esg) = 10*log10(0.1) = -10

   max of predicted Esg seems to be higher than 90dB but 7 Bit should be enough.

*/

#define PVC_ESG_EXP 7

#define LOG10FAC 0.752574989159953f     /* == 10/log2(10) * 2^-2 */

#define LOG10FAC_INV 0.664385618977472f /* == log2(10)/10 * 2^1 */

RAM_ALIGN

LNK_SECTION_CONSTDATA

static const FIXP_SGL pvc_SC_16[] = {

    FX_DBL2FXCONST_SGL(0x14413695), FX_DBL2FXCONST_SGL(0x1434b6cb),

    FX_DBL2FXCONST_SGL(0x140f27c7), FX_DBL2FXCONST_SGL(0x13d0591d),

    FX_DBL2FXCONST_SGL(0x1377f502), FX_DBL2FXCONST_SGL(0x130577d6),

    FX_DBL2FXCONST_SGL(0x12782266), FX_DBL2FXCONST_SGL(0x11cee459),

    FX_DBL2FXCONST_SGL(0x11083a2a), FX_DBL2FXCONST_SGL(0x1021f5e9),

    FX_DBL2FXCONST_SGL(0x0f18e17c), FX_DBL2FXCONST_SGL(0x0de814ca),

    FX_DBL2FXCONST_SGL(0x0c87a568), FX_DBL2FXCONST_SGL(0x0ae9b167),

    FX_DBL2FXCONST_SGL(0x08f24226), FX_DBL2FXCONST_SGL(0x06575ed5),

};

RAM_ALIGN

LNK_SECTION_CONSTDATA

static const FIXP_SGL pvc_SC_12[] = {

    FX_DBL2FXCONST_SGL(0x1aba6b3e), FX_DBL2FXCONST_SGL(0x1a9d164e),

    FX_DBL2FXCONST_SGL(0x1a44d56d), FX_DBL2FXCONST_SGL(0x19b0d742),

    FX_DBL2FXCONST_SGL(0x18df969a), FX_DBL2FXCONST_SGL(0x17ce91a0),

    FX_DBL2FXCONST_SGL(0x1679c3fa), FX_DBL2FXCONST_SGL(0x14daabfc),

    FX_DBL2FXCONST_SGL(0x12e65221), FX_DBL2FXCONST_SGL(0x1088d125),

    FX_DBL2FXCONST_SGL(0x0d9907b3), FX_DBL2FXCONST_SGL(0x09a80e9d),

};

RAM_ALIGN

LNK_SECTION_CONSTDATA

static const FIXP_SGL pvc_SC_4[] = {

    FX_DBL2FXCONST_SGL(0x4ad6ab0f),

    FX_DBL2FXCONST_SGL(0x47ef0dbe),

    FX_DBL2FXCONST_SGL(0x3eee7496),

    FX_DBL2FXCONST_SGL(0x2e4bd29d),

};

RAM_ALIGN

LNK_SECTION_CONSTDATA

static const FIXP_SGL pvc_SC_3[] = {

    FX_DBL2FXCONST_SGL(0x610dc761),

    FX_DBL2FXCONST_SGL(0x5a519a3d),

    FX_DBL2FXCONST_SGL(0x44a09e62),

};

static const UCHAR g_3a_pvcTab1_mode1[PVC_NTAB1][PVC_NBLOW][PVC_NBHIGH_MODE1] =

    {{{0x4F, 0x5B, 0x57, 0x52, 0x4D, 0x65, 0x45, 0x57},

      {0xF3, 0x0F, 0x18, 0x20, 0x19, 0x4F, 0x3D, 0x23},

      {0x78, 0x57, 0x55, 0x50, 0x50, 0x20, 0x36, 0x37}},

     {{0x4C, 0x5F, 0x53, 0x37, 0x1E, 0xFD, 0x15, 0x0A},

      {0x05, 0x0E, 0x28, 0x41, 0x48, 0x6E, 0x54, 0x5B},

      {0x59, 0x47, 0x40, 0x40, 0x3D, 0x33, 0x3F, 0x39}},

     {{0x47, 0x5F, 0x57, 0x34, 0x3C, 0x2E, 0x2E, 0x31},

      {0xFA, 0x13, 0x23, 0x4E, 0x44, 0x7C, 0x34, 0x38},

      {0x63, 0x43, 0x41, 0x3D, 0x35, 0x19, 0x3D, 0x33}}};

static const UCHAR g_2a_pvcTab2_mode1[PVC_NTAB2][PVC_NBHIGH_MODE1] = {

    {0xCB, 0xD1, 0xCC, 0xD2, 0xE2, 0xEB, 0xE7, 0xE8},

    {0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80},

    {0x84, 0x8C, 0x88, 0x83, 0x90, 0x93, 0x86, 0x80},

    {0xD7, 0xD8, 0xC0, 0xC7, 0xCF, 0xE5, 0xF1, 0xF6},

    {0xA5, 0xA6, 0xAA, 0xA8, 0xB0, 0xB1, 0xB8, 0xB8},

    {0xD7, 0xCB, 0xC1, 0xC3, 0xC5, 0xC9, 0xC9, 0xCE},

    {0xCA, 0xB5, 0xB8, 0xB3, 0xAC, 0xB6, 0xBB, 0xB8},

    {0xC1, 0xC4, 0xC3, 0xC5, 0xC6, 0xCA, 0xCA, 0xCB},

    {0xE0, 0xE1, 0xD8, 0xCD, 0xCB, 0xCB, 0xCE, 0xCC},

    {0xDB, 0xE1, 0xDF, 0xDB, 0xDC, 0xD9, 0xD9, 0xD6},

    {0xE0, 0xDE, 0xDD, 0xDD, 0xE0, 0xE3, 0xE5, 0xE6},

    {0xCA, 0xD2, 0xCD, 0xCE, 0xD5, 0xDB, 0xD9, 0xDB},

    {0xD2, 0xE0, 0xDB, 0xD5, 0xDB, 0xDE, 0xE3, 0xE1},

    {0xE5, 0xDB, 0xD0, 0xD2, 0xD8, 0xDD, 0xDB, 0xDD},

    {0xC0, 0xB5, 0xBF, 0xDD, 0xE3, 0xDC, 0xDC, 0xE4},

    {0xDB, 0xCE, 0xC6, 0xCF, 0xCF, 0xD1, 0xD3, 0xD4},

    {0xC9, 0xD7, 0xDA, 0xE2, 0xE9, 0xE7, 0xDF, 0xDC},

    {0x0A, 0x07, 0x0A, 0x08, 0x19, 0x24, 0x1F, 0x22},

    {0x1E, 0x1F, 0x11, 0x0E, 0x22, 0x2D, 0x33, 0x32},

    {0xF0, 0xDA, 0xDC, 0x18, 0x1F, 0x19, 0x0A, 0x1E},

    {0x09, 0xF8, 0xE6, 0x05, 0x19, 0x11, 0x0E, 0x0B},

    {0x09, 0x10, 0x0E, 0xE6, 0xF4, 0x20, 0x22, 0xFA},

    {0xF2, 0xE5, 0xF8, 0x0E, 0x18, 0x15, 0x0D, 0x10},

    {0x15, 0x13, 0x16, 0x0A, 0x0D, 0x1F, 0x1D, 0x1B},

    {0xFA, 0xFF, 0xFE, 0xFF, 0x09, 0x11, 0x03, 0x0B},

    {0xFE, 0xFA, 0xF2, 0xF8, 0x0C, 0x1E, 0x11, 0x12},

    {0xFA, 0xF8, 0x0B, 0x17, 0x1D, 0x17, 0x0E, 0x16},

    {0x00, 0xF3, 0xFD, 0x0A, 0x1C, 0x17, 0xFD, 0x08},

    {0xEA, 0xEA, 0x03, 0x12, 0x1E, 0x14, 0x09, 0x04},

    {0x02, 0xFE, 0x04, 0xFB, 0x0C, 0x0E, 0x07, 0x02},

    {0xF6, 0x02, 0x07, 0x0B, 0x17, 0x17, 0x01, 0xFF},

    {0xF5, 0xFB, 0xFE, 0x04, 0x12, 0x14, 0x0C, 0x0D},

    {0x10, 0x10, 0x0E, 0x04, 0x07, 0x11, 0x0F, 0x13},

    {0x0C, 0x0F, 0xFB, 0xF2, 0x0A, 0x12, 0x09, 0x0D},

    {0x0D, 0x1D, 0xF1, 0xF4, 0x2A, 0x06, 0x3B, 0x32},

    {0xFC, 0x08, 0x06, 0x02, 0x0E, 0x17, 0x08, 0x0E},

    {0x07, 0x02, 0xEE, 0xEE, 0x2B, 0xF6, 0x23, 0x13},

    {0x04, 0x02, 0x05, 0x08, 0x0B, 0x0E, 0xFB, 0xFB},

    {0x00, 0x04, 0x10, 0x18, 0x22, 0x25, 0x1D, 0x1F},

    {0xFB, 0x0D, 0x07, 0x00, 0x0C, 0x0F, 0xFC, 0x02},

    {0x00, 0x00, 0x00, 0x01, 0x05, 0x07, 0x03, 0x05},

    {0x04, 0x05, 0x08, 0x13, 0xFF, 0xEB, 0x0C, 0x06},

    {0x05, 0x13, 0x0E, 0x0B, 0x12, 0x15, 0x09, 0x0A},

    {0x09, 0x03, 0x09, 0x05, 0x12, 0x16, 0x11, 0x12},

    {0x14, 0x1A, 0x06, 0x01, 0x10, 0x11, 0xFE, 0x02},

    {0x01, 0x0B, 0x0B, 0x0C, 0x18, 0x21, 0x10, 0x13},

    {0x12, 0x0D, 0x0A, 0x10, 0x1C, 0x1D, 0x0D, 0x10},

    {0x03, 0x09, 0x14, 0x15, 0x1B, 0x1A, 0x01, 0xFF},

    {0x08, 0x12, 0x13, 0x0E, 0x16, 0x1D, 0x14, 0x1B},

    {0x07, 0x15, 0x1C, 0x1B, 0x20, 0x21, 0x11, 0x0E},

    {0x12, 0x18, 0x19, 0x17, 0x20, 0x25, 0x1A, 0x1E},

    {0x0C, 0x1A, 0x1D, 0x22, 0x2F, 0x33, 0x27, 0x28},

    {0x0E, 0x1A, 0x17, 0x10, 0x0A, 0x0E, 0xFF, 0x06},

    {0x1A, 0x1C, 0x18, 0x14, 0x1A, 0x16, 0x0A, 0x0E},

    {0x1E, 0x27, 0x25, 0x26, 0x27, 0x2A, 0x21, 0x21},

    {0xF1, 0x0A, 0x16, 0x1C, 0x28, 0x25, 0x15, 0x19},

    {0x08, 0x12, 0x09, 0x08, 0x16, 0x17, 0xEF, 0xF6},

    {0x0C, 0x0B, 0x00, 0xFC, 0x04, 0x09, 0xFC, 0x03},

    {0xFB, 0xF1, 0xF8, 0x26, 0x24, 0x18, 0x1D, 0x20},

    {0xF9, 0x01, 0x0C, 0x0F, 0x07, 0x08, 0x06, 0x07},

    {0x07, 0x06, 0x08, 0x04, 0x07, 0x0D, 0x07, 0x09},

    {0xFE, 0x01, 0x06, 0x05, 0x13, 0x1B, 0x14, 0x19},

    {0x09, 0x0C, 0x0E, 0x01, 0x08, 0x05, 0xFB, 0xFD},

    {0x07, 0x06, 0x03, 0x0A, 0x16, 0x12, 0x04, 0x07},

    {0x04, 0x01, 0x00, 0x04, 0x1F, 0x20, 0x0E, 0x0A},

    {0x03, 0xFF, 0xF6, 0xFB, 0x15, 0x1A, 0x00, 0x03},

    {0xFC, 0x18, 0x0B, 0x2D, 0x35, 0x23, 0x12, 0x09},

    {0x02, 0xFE, 0x01, 0xFF, 0x0C, 0x11, 0x0D, 0x0F},

    {0xFA, 0xE9, 0xD9, 0xFF, 0x0D, 0x05, 0x0D, 0x10},

    {0xF1, 0xE0, 0xF0, 0x01, 0x06, 0x06, 0x06, 0x10},

    {0xE9, 0xD4, 0xD7, 0x0F, 0x14, 0x0B, 0x0D, 0x16},

    {0x00, 0xFF, 0xEE, 0xE5, 0xFF, 0x08, 0x02, 0xF9},

    {0xE0, 0xDA, 0xE5, 0xFE, 0x09, 0x02, 0xF9, 0x04},

    {0xE0, 0xE2, 0xF4, 0x09, 0x13, 0x0C, 0x0D, 0x09},

    {0xFC, 0x02, 0x04, 0xFF, 0x00, 0xFF, 0xF8, 0xF7},

    {0xFE, 0xFB, 0xED, 0xF2, 0xFE, 0xFE, 0x08, 0x0C},

    {0xF3, 0xEF, 0xD0, 0xE3, 0x05, 0x11, 0xFD, 0xFF},

    {0xFA, 0xEF, 0xEA, 0xFE, 0x0D, 0x0E, 0xFE, 0x02},

    {0xF7, 0xFB, 0xDB, 0xDF, 0x14, 0xDD, 0x07, 0xFE},

    {0xFE, 0x08, 0x00, 0xDB, 0xE5, 0x1A, 0x13, 0xED},

    {0xF9, 0xFE, 0xFF, 0xF4, 0xF3, 0x00, 0x05, 0x02},

    {0xEF, 0xDE, 0xD8, 0xEB, 0xEA, 0xF5, 0x0E, 0x19},

    {0xFB, 0xFC, 0xFA, 0xEC, 0xEB, 0xED, 0xEE, 0xE8},

    {0xEE, 0xFC, 0xFD, 0x00, 0x04, 0xFC, 0xF0, 0xF5},

    {0x00, 0xFA, 0xF4, 0xF1, 0xF5, 0xFA, 0xFB, 0xF9},

    {0xEB, 0xF0, 0xDF, 0xE3, 0xEF, 0x07, 0x02, 0x05},

    {0xF7, 0xF0, 0xE6, 0xE7, 0x06, 0x15, 0x06, 0x0C},

    {0xF1, 0xE4, 0xD8, 0xEA, 0x06, 0xF2, 0x07, 0x09},

    {0xFF, 0xFE, 0xFE, 0xF9, 0xFF, 0xFF, 0x02, 0xF9},

    {0xDD, 0xF4, 0xF0, 0xF1, 0xFF, 0xFF, 0xEA, 0xF1},

    {0xF0, 0xF1, 0xFD, 0x03, 0x03, 0xFE, 0x00, 0x05},

    {0xF1, 0xF6, 0xE0, 0xDF, 0xF5, 0x01, 0xF4, 0xF8},

    {0x02, 0x03, 0xE5, 0xDC, 0xE7, 0xFD, 0x02, 0x08},

    {0xEC, 0xF1, 0xF5, 0xEC, 0xF2, 0xF8, 0xF6, 0xEE},

    {0xF3, 0xF4, 0xF6, 0xF4, 0xF5, 0xF1, 0xE7, 0xEA},

    {0xF7, 0xF3, 0xEC, 0xEA, 0xEF, 0xF0, 0xEE, 0xF1},

    {0xEB, 0xF6, 0xFB, 0xFA, 0xEF, 0xF3, 0xF3, 0xF7},

    {0x01, 0x03, 0xF1, 0xF6, 0x05, 0xF8, 0xE1, 0xEB},

    {0xF5, 0xF6, 0xF6, 0xF4, 0xFB, 0xFB, 0xFF, 0x00},

    {0xF8, 0x01, 0xFB, 0xFA, 0xFF, 0x03, 0xFE, 0x04},

    {0x04, 0xFB, 0x03, 0xFD, 0xF5, 0xF7, 0xF6, 0xFB},

    {0x06, 0x09, 0xFB, 0xF4, 0xF9, 0xFA, 0xFC, 0xFF},

    {0xF5, 0xF6, 0xF1, 0xEE, 0xF5, 0xF8, 0xF5, 0xF9},

    {0xF5, 0xF9, 0xFA, 0xFC, 0x07, 0x09, 0x01, 0xFB},

    {0xD7, 0xE9, 0xE8, 0xEC, 0x00, 0x0C, 0xFE, 0xF1},

    {0xEC, 0x04, 0xE9, 0xDF, 0x03, 0xE8, 0x00, 0xFA},

    {0xE6, 0xE2, 0xFF, 0x0A, 0x13, 0x01, 0x00, 0xF7},

    {0xF1, 0xFA, 0xF7, 0xF5, 0x01, 0x06, 0x05, 0x0A},

    {0xF6, 0xF6, 0xFC, 0xF6, 0xE8, 0x11, 0xF2, 0xFE},

    {0xFE, 0x08, 0x05, 0x12, 0xFD, 0xD0, 0x0E, 0x07},

    {0xF1, 0xFE, 0xF7, 0xF2, 0xFB, 0x02, 0xFA, 0xF8},

    {0xF4, 0xEA, 0xEC, 0xF3, 0xFE, 0x01, 0xF7, 0xF6},

    {0xFF, 0xFA, 0xFB, 0xF9, 0xFF, 0x01, 0x04, 0x03},

    {0x00, 0xF9, 0xF4, 0xFC, 0x05, 0xFC, 0xF7, 0xFB},

    {0xF8, 0xFF, 0xEF, 0xEC, 0xFB, 0x04, 0xF8, 0x03},

    {0xEB, 0xF1, 0xED, 0xF4, 0x02, 0x0E, 0x0B, 0x04},

    {0xF7, 0x01, 0xF8, 0xF4, 0xF8, 0xEF, 0xF8, 0x04},

    {0xEB, 0xF0, 0xF7, 0xFC, 0x10, 0x0D, 0xF8, 0xF8},

    {0xE8, 0xFE, 0xEE, 0xE8, 0xED, 0xF7, 0xF5, 0xF8},

    {0xED, 0xEB, 0xE9, 0xEA, 0xF2, 0xF5, 0xF4, 0xF9},

    {0xEA, 0xF2, 0xEF, 0xEE, 0xF9, 0xFE, 0xFD, 0x02},

    {0xFA, 0xFD, 0x02, 0x0D, 0xFA, 0xE4, 0x0F, 0x01},

    {0xFF, 0x08, 0x05, 0xF6, 0xF7, 0xFB, 0xF1, 0xF1},

    {0xF4, 0xEC, 0xEE, 0xF6, 0xEE, 0xEE, 0xF8, 0x06},

    {0xE8, 0xFA, 0xF8, 0xE8, 0xF8, 0xE9, 0xEE, 0xF9},

    {0xE5, 0xE9, 0xF0, 0x00, 0x00, 0xEF, 0xF3, 0xF8},

    {0xF7, 0xFB, 0xFB, 0xF7, 0xF9, 0xF9, 0xF5, 0xF0},

    {0xFD, 0xFF, 0xF2, 0xEE, 0xF2, 0xF5, 0xF1, 0xF3}};

static const UCHAR g_3a_pvcTab1_mode2[PVC_NTAB1][PVC_NBLOW][PVC_NBHIGH_MODE2] =

    {{{0x11, 0x27, 0x0F, 0xFD, 0x04, 0xFC},

      {0x00, 0xBE, 0xE3, 0xF4, 0xDB, 0xF0},

      {0x09, 0x1E, 0x18, 0x1A, 0x21, 0x1B}},

     {{0x16, 0x28, 0x2B, 0x29, 0x25, 0x32},

      {0xF2, 0xE9, 0xE4, 0xE5, 0xE2, 0xD4},

      {0x0E, 0x0B, 0x0C, 0x0D, 0x0D, 0x0E}},

     {{0x2E, 0x3C, 0x20, 0x16, 0x1B, 0x1A},

      {0xE4, 0xC6, 0xE5, 0xF4, 0xDC, 0xDC},

      {0x0F, 0x1B, 0x18, 0x14, 0x1E, 0x1A}}};

static const UCHAR g_2a_pvcTab2_mode2[PVC_NTAB2][PVC_NBHIGH_MODE2] = {

    {0x26, 0x25, 0x11, 0x0C, 0xFA, 0x15}, {0x1B, 0x18, 0x11, 0x0E, 0x0E, 0x0E},

    {0x12, 0x10, 0x10, 0x10, 0x11, 0x10}, {0x1E, 0x24, 0x19, 0x15, 0x14, 0x12},

    {0x24, 0x16, 0x12, 0x13, 0x15, 0x1C}, {0xEA, 0xED, 0xEB, 0xEA, 0xEC, 0xEB},

    {0xFC, 0xFD, 0xFD, 0xFC, 0xFE, 0xFE}, {0x0F, 0x0C, 0x0B, 0x0A, 0x0B, 0x0B},

    {0x22, 0x0B, 0x16, 0x18, 0x13, 0x19}, {0x1C, 0x14, 0x1D, 0x20, 0x19, 0x1A},

    {0x10, 0x08, 0x00, 0xFF, 0x02, 0x05}, {0x06, 0x07, 0x05, 0x03, 0x05, 0x04},

    {0x2A, 0x1F, 0x12, 0x12, 0x11, 0x18}, {0x19, 0x19, 0x02, 0x04, 0x00, 0x04},

    {0x18, 0x17, 0x17, 0x15, 0x16, 0x15}, {0x21, 0x1E, 0x1B, 0x19, 0x1C, 0x1B},

    {0x3C, 0x35, 0x20, 0x1D, 0x30, 0x34}, {0x3A, 0x1F, 0x37, 0x38, 0x33, 0x31},

    {0x37, 0x34, 0x25, 0x27, 0x35, 0x34}, {0x34, 0x2E, 0x32, 0x31, 0x34, 0x31},

    {0x36, 0x33, 0x2F, 0x2F, 0x32, 0x2F}, {0x35, 0x20, 0x2F, 0x32, 0x2F, 0x2C},

    {0x2E, 0x2B, 0x2F, 0x34, 0x36, 0x30}, {0x3F, 0x39, 0x30, 0x28, 0x29, 0x29},

    {0x3C, 0x30, 0x32, 0x37, 0x39, 0x36}, {0x37, 0x36, 0x30, 0x2B, 0x26, 0x24},

    {0x44, 0x38, 0x2F, 0x2D, 0x2D, 0x2D}, {0x38, 0x2B, 0x2C, 0x2C, 0x30, 0x2D},

    {0x37, 0x36, 0x2F, 0x23, 0x2D, 0x32}, {0x3C, 0x39, 0x29, 0x2E, 0x38, 0x37},

    {0x3B, 0x3A, 0x35, 0x32, 0x31, 0x2D}, {0x32, 0x31, 0x2F, 0x2C, 0x2D, 0x28},

    {0x2C, 0x31, 0x32, 0x30, 0x32, 0x2D}, {0x35, 0x34, 0x34, 0x34, 0x35, 0x33},

    {0x34, 0x38, 0x3B, 0x3C, 0x3E, 0x3A}, {0x3E, 0x3C, 0x3B, 0x3A, 0x3C, 0x39},

    {0x3D, 0x41, 0x46, 0x41, 0x3D, 0x38}, {0x44, 0x41, 0x40, 0x3E, 0x3F, 0x3A},

    {0x47, 0x47, 0x47, 0x42, 0x44, 0x40}, {0x4C, 0x4A, 0x4A, 0x46, 0x49, 0x45},

    {0x53, 0x52, 0x52, 0x4C, 0x4E, 0x49}, {0x41, 0x3D, 0x39, 0x2C, 0x2E, 0x2E},

    {0x2D, 0x37, 0x36, 0x30, 0x28, 0x36}, {0x3B, 0x32, 0x2E, 0x2D, 0x2D, 0x29},

    {0x40, 0x39, 0x36, 0x35, 0x36, 0x32}, {0x30, 0x2D, 0x2D, 0x2E, 0x31, 0x30},

    {0x38, 0x3D, 0x3B, 0x37, 0x35, 0x34}, {0x44, 0x3D, 0x3C, 0x38, 0x37, 0x33},

    {0x3A, 0x36, 0x37, 0x37, 0x39, 0x36}, {0x32, 0x36, 0x37, 0x30, 0x2E, 0x2A},

    {0x3C, 0x33, 0x33, 0x31, 0x33, 0x30}, {0x30, 0x31, 0x36, 0x37, 0x38, 0x34},

    {0x26, 0x27, 0x2E, 0x29, 0x1C, 0x16}, {0x14, 0x15, 0x1F, 0x17, 0x15, 0x1C},

    {0x38, 0x2D, 0x18, 0x13, 0x1E, 0x2B}, {0x30, 0x22, 0x17, 0x1A, 0x26, 0x2B},

    {0x24, 0x20, 0x1F, 0x10, 0x0C, 0x11}, {0x27, 0x1F, 0x13, 0x17, 0x24, 0x2A},

    {0x2F, 0x13, 0x18, 0x13, 0x2A, 0x32}, {0x31, 0x1E, 0x1E, 0x1E, 0x21, 0x28},

    {0x2A, 0x12, 0x19, 0x17, 0x16, 0x24}, {0x27, 0x0F, 0x16, 0x1D, 0x17, 0x1C},

    {0x2F, 0x26, 0x25, 0x22, 0x20, 0x22}, {0x1E, 0x1B, 0x1E, 0x18, 0x1E, 0x24},

    {0x31, 0x26, 0x0E, 0x15, 0x15, 0x25}, {0x2D, 0x22, 0x1E, 0x14, 0x10, 0x22},

    {0x25, 0x1B, 0x18, 0x11, 0x13, 0x1F}, {0x2F, 0x1B, 0x13, 0x1B, 0x18, 0x22},

    {0x21, 0x24, 0x1D, 0x1C, 0x1D, 0x1B}, {0x23, 0x1E, 0x28, 0x29, 0x27, 0x25},

    {0x2E, 0x2A, 0x1D, 0x17, 0x26, 0x2D}, {0x31, 0x2C, 0x1A, 0x0E, 0x1A, 0x24},

    {0x26, 0x16, 0x20, 0x1D, 0x14, 0x1E}, {0x29, 0x20, 0x1B, 0x1B, 0x17, 0x17},

    {0x1D, 0x06, 0x1A, 0x1E, 0x1B, 0x1D}, {0x2B, 0x23, 0x1F, 0x1F, 0x1D, 0x1C},

    {0x27, 0x1A, 0x0C, 0x0E, 0x0F, 0x1A}, {0x29, 0x1D, 0x1E, 0x22, 0x22, 0x24},

    {0x20, 0x21, 0x1B, 0x18, 0x13, 0x21}, {0x27, 0x0E, 0x10, 0x14, 0x10, 0x1A},

    {0x26, 0x24, 0x25, 0x25, 0x26, 0x28}, {0x1A, 0x24, 0x25, 0x29, 0x26, 0x24},

    {0x1D, 0x1D, 0x15, 0x12, 0x0F, 0x18}, {0x1E, 0x14, 0x13, 0x12, 0x14, 0x18},

    {0x16, 0x13, 0x13, 0x1A, 0x1B, 0x1D}, {0x20, 0x27, 0x22, 0x24, 0x1A, 0x19},

    {0x1F, 0x17, 0x19, 0x18, 0x17, 0x18}, {0x20, 0x1B, 0x1C, 0x1C, 0x1B, 0x1A},

    {0x23, 0x19, 0x1D, 0x1F, 0x1E, 0x21}, {0x26, 0x1F, 0x1D, 0x1B, 0x19, 0x1A},

    {0x23, 0x1E, 0x1F, 0x20, 0x1F, 0x1E}, {0x29, 0x20, 0x22, 0x20, 0x20, 0x1F},

    {0x26, 0x23, 0x21, 0x22, 0x23, 0x23}, {0x29, 0x1F, 0x24, 0x25, 0x26, 0x29},

    {0x2B, 0x22, 0x25, 0x27, 0x23, 0x21}, {0x29, 0x21, 0x19, 0x0E, 0x22, 0x2D},

    {0x32, 0x29, 0x1F, 0x1C, 0x1B, 0x21}, {0x1E, 0x1A, 0x1E, 0x24, 0x25, 0x25},

    {0x24, 0x1D, 0x21, 0x22, 0x22, 0x25}, {0x2C, 0x25, 0x21, 0x22, 0x23, 0x25},

    {0x24, 0x1E, 0x21, 0x26, 0x2B, 0x2C}, {0x28, 0x24, 0x1B, 0x1F, 0x28, 0x2D},

    {0x23, 0x13, 0x16, 0x22, 0x22, 0x29}, {0x1B, 0x23, 0x1C, 0x20, 0x14, 0x0D},

    {0x1E, 0x16, 0x1A, 0x1E, 0x1C, 0x1D}, {0x2B, 0x1C, 0x1D, 0x20, 0x1B, 0x1C},

    {0x1C, 0x1B, 0x23, 0x1F, 0x19, 0x1E}, {0x21, 0x23, 0x26, 0x20, 0x20, 0x22},

    {0x1D, 0x0B, 0x19, 0x1E, 0x11, 0x19}, {0x18, 0x17, 0x16, 0x17, 0x14, 0x16},

    {0x16, 0x19, 0x1C, 0x20, 0x21, 0x22}, {0x30, 0x1E, 0x22, 0x24, 0x25, 0x26},

    {0x1B, 0x1F, 0x17, 0x1D, 0x1E, 0x21}, {0x32, 0x2B, 0x27, 0x1F, 0x1B, 0x1A},

    {0x28, 0x20, 0x1A, 0x1B, 0x1F, 0x23}, {0x32, 0x21, 0x20, 0x21, 0x1D, 0x1F},

    {0x22, 0x18, 0x12, 0x15, 0x1B, 0x20}, {0x27, 0x27, 0x2A, 0x24, 0x21, 0x21},

    {0x1E, 0x0F, 0x0D, 0x1A, 0x1D, 0x23}, {0x28, 0x25, 0x27, 0x21, 0x17, 0x25},

    {0x2B, 0x27, 0x23, 0x19, 0x13, 0x14}, {0x25, 0x2B, 0x22, 0x22, 0x20, 0x21},

    {0x27, 0x1B, 0x16, 0x17, 0x0F, 0x15}, {0x29, 0x26, 0x23, 0x15, 0x1E, 0x28},

    {0x24, 0x1C, 0x19, 0x1A, 0x18, 0x19}, {0x2D, 0x15, 0x27, 0x2B, 0x24, 0x23},

    {0x2C, 0x12, 0x1F, 0x23, 0x1F, 0x20}, {0x25, 0x0F, 0x22, 0x27, 0x1F, 0x21}};

static const UCHAR g_a_pvcTab1_dp_mode1[PVC_NTAB1 - 1] = {17, 68};

static const UCHAR g_a_pvcTab1_dp_mode2[PVC_NTAB1 - 1] = {16, 52};

/* fractional exponent which corresponds to Q representation value */

static const SCHAR g_a_scalingCoef_mode1[PVC_NBLOW + 1] = {

    -1, -1, 0, 6}; /* { 8, 8, 7, 1 }; Q scaling */

static const SCHAR g_a_scalingCoef_mode2[PVC_NBLOW + 1] = {

    0, 0, 1, 7}; /* { 7, 7, 6, 0 }; Q scaling */

int pvcInitFrame(PVC_STATIC_DATA *pPvcStaticData,

                 PVC_DYNAMIC_DATA *pPvcDynamicData, const UCHAR pvcMode,

                 const UCHAR ns, const int RATE, const int kx,

                 const int pvcBorder0, const UCHAR *pPvcID) {

  int lbw, hbw, i, temp;

  pPvcDynamicData->pvc_mode = pvcMode;

  pPvcDynamicData->kx = kx;

  pPvcDynamicData->RATE = RATE;

  switch (pvcMode) {

    case 0:

      /* legacy SBR, nothing to do */

      return 0;

    case 1:

      pPvcDynamicData->nbHigh = 8;

      pPvcDynamicData->pPVCTab1 = (const UCHAR *)g_3a_pvcTab1_mode1;

      pPvcDynamicData->pPVCTab2 = (const UCHAR *)g_2a_pvcTab2_mode1;

      pPvcDynamicData->pPVCTab1_dp = g_a_pvcTab1_dp_mode1;

      pPvcDynamicData->pScalingCoef = g_a_scalingCoef_mode1;

      hbw = 8 / RATE;

      break;

    case 2:

      pPvcDynamicData->nbHigh = 6;

      pPvcDynamicData->pPVCTab1 = (const UCHAR *)g_3a_pvcTab1_mode2;

      pPvcDynamicData->pPVCTab2 = (const UCHAR *)g_2a_pvcTab2_mode2;

      pPvcDynamicData->pPVCTab1_dp = g_a_pvcTab1_dp_mode2;

      pPvcDynamicData->pScalingCoef = g_a_scalingCoef_mode2;

      hbw = 12 / RATE;

      break;

    default:

      /* invalid pvcMode */

      return 1;

  }

  pPvcDynamicData->pvcBorder0 = pvcBorder0;

  UCHAR pvcBorder0_last = pPvcStaticData->pvcBorder0;

  pPvcStaticData->pvcBorder0 = pvcBorder0;

  pPvcDynamicData->pPvcID = pPvcID;

  pPvcDynamicData->ns = ns;

  switch (ns) {

    case 16:

      pPvcDynamicData->pSCcoeffs = pvc_SC_16;

      break;

    case 12:

      pPvcDynamicData->pSCcoeffs = pvc_SC_12;

      break;

    case 4:

      pPvcDynamicData->pSCcoeffs = pvc_SC_4;

      break;

    case 3:

      pPvcDynamicData->pSCcoeffs = pvc_SC_3;

      break;

    default:

      return 1;

  }

  /* in the lower part of Esg-array there are previous values of Esg (from last

     call to this function In case of an previous legay-SBR frame, or if there

     was a change in cross-over FQ the value of first PVC SBR timeslot is

     propagated to prev-values in order to have reasonable values for

     smooth-filtering

  */

  if ((pPvcStaticData->pvc_mode_last == 0) || (pPvcStaticData->kx_last != kx)) {

    pPvcDynamicData->pastEsgSlotsAvail = 0;

  } else {

    pPvcDynamicData->pastEsgSlotsAvail = PVC_NS_MAX - pvcBorder0_last;

  }

  lbw = 8 / RATE;

  temp = kx;

  for (i = PVC_NBLOW; i >= 0; i--) {

    pPvcDynamicData->sg_offset_low[i] = temp;

    temp -= lbw;

  }

  temp = 0;

  for (i = 0; i <= pPvcDynamicData->nbHigh; i++) {

    pPvcDynamicData->sg_offset_high_kx[i] = temp;

    temp += hbw;

  }

  return 0;

}

/* call if pvcMode = 1,2 */

void pvcDecodeFrame(PVC_STATIC_DATA *pPvcStaticData,

                    PVC_DYNAMIC_DATA *pPvcDynamicData, FIXP_DBL **qmfBufferReal,

                    FIXP_DBL **qmfBufferImag, const int overlap,

                    const int qmfExponentOverlap,

                    const int qmfExponentCurrent) {

  int t;

  FIXP_DBL *predictedEsgSlot;

  int RATE = pPvcDynamicData->RATE;

  int pvcBorder0 = pPvcDynamicData->pvcBorder0;

  for (t = pvcBorder0; t < PVC_NTIMESLOT; t++) {

    int *pPredEsg_exp = &pPvcDynamicData->predEsg_exp[t];

    predictedEsgSlot = pPvcDynamicData->predEsg[t];

    pvcDecodeTimeSlot(

        pPvcStaticData, pPvcDynamicData, &qmfBufferReal[t * RATE],

        &qmfBufferImag[t * RATE],

        (t * RATE < overlap) ? qmfExponentOverlap : qmfExponentCurrent,

        pvcBorder0, t, predictedEsgSlot, pPredEsg_exp);

  }

  return;

}

void pvcDecodeTimeSlot(PVC_STATIC_DATA *pPvcStaticData,

                       PVC_DYNAMIC_DATA *pPvcDynamicData,

                       FIXP_DBL **qmfSlotReal, FIXP_DBL **qmfSlotImag,

                       const int qmfExponent, const int pvcBorder0,

                       const int timeSlotNumber, FIXP_DBL predictedEsgSlot[],

                       int *predictedEsg_exp) {

  int i, band, ksg, ksg_start = 0;

  int RATE = pPvcDynamicData->RATE;

  int Esg_index = pPvcStaticData->Esg_slot_index;

  const SCHAR *sg_borders = pPvcDynamicData->sg_offset_low;

  FIXP_DBL *pEsg = pPvcStaticData->Esg[Esg_index];

  FIXP_DBL E[PVC_NBLOW] = {0};

  /* Subband grouping in QMF subbands below SBR range */

  /* Within one timeslot ( i = [0...(RATE-1)] QMF subsamples) calculate energy

     E(ib,t) and group them to Esg(ksg,t). Then transfer values to logarithmical

     domain and store them for time domain smoothing. (7.5.6.3 Subband grouping

     in QMF subbands below SBR range)

  */

  for (ksg = 0; sg_borders[ksg] < 0; ksg++) {

    pEsg[ksg] = FL2FXCONST_DBL(-10.0 / (1 << PVC_ESG_EXP)); /* 10*log10(0.1) */

    ksg_start++;

  }

  for (i = 0; i < RATE; i++) {

    FIXP_DBL *qmfR, *qmfI;

    qmfR = qmfSlotReal[i];

    qmfI = qmfSlotImag[i];

    for (ksg = ksg_start; ksg < PVC_NBLOW; ksg++) {

      for (band = sg_borders[ksg]; band < sg_borders[ksg + 1]; band++) {

        /* The division by 8 == (RATE*lbw) is required algorithmically */

        E[ksg] +=

            ((fPow2Div2(qmfR[band]) >> 1) + (fPow2Div2(qmfI[band]) >> 1)) >> 3;

      }

    }

  }

  for (ksg = ksg_start; ksg < PVC_NBLOW; ksg++) {

    if (E[ksg] > (FIXP_DBL)0) {

      /* 10/log2(10) = 0.752574989159953 * 2^2 */

      int exp_log;

      FIXP_DBL nrg = CalcLog2(E[ksg], 2 * qmfExponent + 2, &exp_log);

      nrg = fMult(nrg, FL2FXCONST_SGL(LOG10FAC));

      nrg = scaleValue(nrg, exp_log - PVC_ESG_EXP + 2);

      pEsg[ksg] = fMax(nrg, FL2FXCONST_DBL(-10.0 / (1 << PVC_ESG_EXP)));

    } else {

      pEsg[ksg] =

          FL2FXCONST_DBL(-10.0 / (1 << PVC_ESG_EXP)); /* 10*log10(0.1) */

    }

  }

  /* Time domain smoothing of subband-grouped energy */

  {

    int idx = pPvcStaticData->Esg_slot_index;

    FIXP_DBL *pEsg_filt;

    FIXP_SGL SCcoeff;

    E[0] = E[1] = E[2] = (FIXP_DBL)0;

    for (i = 0; i < pPvcDynamicData->ns; i++) {

      SCcoeff = pPvcDynamicData->pSCcoeffs[i];

      pEsg_filt = pPvcStaticData->Esg[idx];

      /* Div2 is compensated by scaling of coeff table */

      E[0] = fMultAddDiv2(E[0], pEsg_filt[0], SCcoeff);

      E[1] = fMultAddDiv2(E[1], pEsg_filt[1], SCcoeff);

      E[2] = fMultAddDiv2(E[2], pEsg_filt[2], SCcoeff);

      if (i >= pPvcDynamicData->pastEsgSlotsAvail) {

        /* if past Esg values are not available use the ones from the last valid

         * slot */

        continue;

      }

      if (idx > 0) {

        idx--;

      } else {

        idx += PVC_NS_MAX - 1;

      }

    }

  }

  /* SBR envelope scalefactor prediction */

  {

    int E_high_exp[PVC_NBHIGH_MAX];

    int E_high_exp_max = 0;

    int pvcTab1ID;

    int pvcTab2ID = (int)pPvcDynamicData->pPvcID[timeSlotNumber];

    const UCHAR *pTab1, *pTab2;

    if (pvcTab2ID < pPvcDynamicData->pPVCTab1_dp[0]) {

      pvcTab1ID = 0;

    } else if (pvcTab2ID < pPvcDynamicData->pPVCTab1_dp[1]) {

      pvcTab1ID = 1;

    } else {

      pvcTab1ID = 2;

    }

    pTab1 = &(pPvcDynamicData

                  ->pPVCTab1[pvcTab1ID * PVC_NBLOW * pPvcDynamicData->nbHigh]);

    pTab2 = &(pPvcDynamicData->pPVCTab2[pvcTab2ID * pPvcDynamicData->nbHigh]);

    for (ksg = 0; ksg < pPvcDynamicData->nbHigh; ksg++) {

      FIXP_SGL predCoeff;

      FIXP_DBL accu;

      int predCoeff_exp, kb;

      E_high_exp[ksg] = 0;

      /* residual part */

      accu = ((LONG)(SCHAR)*pTab2++) << (DFRACT_BITS - 8 - PVC_ESG_EXP - 2 +

                                         pPvcDynamicData->pScalingCoef[3]);

      /* linear combination of lower grouped energies part */

      for (kb = 0; kb < PVC_NBLOW; kb++) {

        predCoeff = (FIXP_SGL)(

            (SHORT)(SCHAR)pTab1[kb * pPvcDynamicData->nbHigh + ksg] << 8);

        predCoeff_exp = -(pPvcDynamicData->pScalingCoef[kb] + 1 -

                          2); /* +1 to compensate for Div2; -2 for accu */

        accu += fMultDiv2(E[kb], predCoeff) >> predCoeff_exp;

      }

      /* convert back to linear domain */

      accu = fMult(accu, FL2FXCONST_SGL(LOG10FAC_INV));

      accu = f2Pow(accu, PVC_ESG_EXP - 1 + 2,

                   &predCoeff_exp); /* -1 compensates for exponent of

                                       LOG10FAC_INV; +2 for accu */

      predictedEsgSlot[ksg] = accu;

      E_high_exp[ksg] = predCoeff_exp;

      if (predCoeff_exp > E_high_exp_max) {

        E_high_exp_max = predCoeff_exp;

      }

    }

    /* rescale output vector according to largest exponent */

    for (ksg = 0; ksg < pPvcDynamicData->nbHigh; ksg++) {

      int scale = fMin(E_high_exp_max - E_high_exp[ksg], DFRACT_BITS - 1);

      predictedEsgSlot[ksg] = predictedEsgSlot[ksg] >> scale;

    }

    *predictedEsg_exp = E_high_exp_max;

  }

  pPvcStaticData->Esg_slot_index =

      (pPvcStaticData->Esg_slot_index + 1) & (PVC_NS_MAX - 1);

  pPvcDynamicData->pastEsgSlotsAvail =

      fMin(pPvcDynamicData->pastEsgSlotsAvail + 1, PVC_NS_MAX - 1);

  return;

}

/* call if pvcMode = 0,1,2 */

void pvcEndFrame(PVC_STATIC_DATA *pPvcStaticData,

                 PVC_DYNAMIC_DATA *pPvcDynamicData) {

  pPvcStaticData->pvc_mode_last = pPvcDynamicData->pvc_mode;

  pPvcStaticData->kx_last = pPvcDynamicData->kx;

  if (pPvcDynamicData->pvc_mode == 0) return;

  {

    int t, max = -100;

    for (t = pPvcDynamicData->pvcBorder0; t < PVC_NTIMESLOT; t++) {

      if (pPvcDynamicData->predEsg_exp[t] > max) {

        max = pPvcDynamicData->predEsg_exp[t];

      }

    }

    pPvcDynamicData->predEsg_expMax = max;

  }

  return;

}

void expandPredEsg(const PVC_DYNAMIC_DATA *pPvcDynamicData, const int timeSlot,

                   const int lengthOutputVector, FIXP_DBL *pOutput,

                   SCHAR *pOutput_exp) {

  int k = 0, ksg;

  const FIXP_DBL *predEsg = pPvcDynamicData->predEsg[timeSlot];

  for (ksg = 0; ksg < pPvcDynamicData->nbHigh; ksg++) {

    for (; k < pPvcDynamicData->sg_offset_high_kx[ksg + 1]; k++) {

      pOutput[k] = predEsg[ksg];

      pOutput_exp[k] = (SCHAR)pPvcDynamicData->predEsg_exp[timeSlot];

    }

  }

  ksg--;

  for (; k < lengthOutputVector; k++) {

    pOutput[k] = predEsg[ksg];

    pOutput_exp[k] = (SCHAR)pPvcDynamicData->predEsg_exp[timeSlot];

  }

  return;

}