path: root/fdk-aac/libSBRdec/src/pvc_dec.cpp

/* -----------------------------------------------------------------------------
Software License for The Fraunhofer FDK AAC Codec Library for Android

© Copyright  1995 - 2018 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
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charge copies of the complete source code of the FDK AAC Codec and your
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AAC Codec Library for Android."

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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
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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,
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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]) + fPow2Div2(qmfI[band])) >> 2;
      }
    }
  }
  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, &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 +
                                         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; /* +1 to compensate for Div2 */
        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,
          &predCoeff_exp); /* -1 compensates for exponent of LOG10FAC_INV */
      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 = E_high_exp[ksg] - E_high_exp_max;
      predictedEsgSlot[ksg] = scaleValue(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;
}