
/* -----------------------------------------------------------------------------------------------------------
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-4 AAC Decoder  ***************************

   Author(s):   Robert Weidner (DSP Solutions)
   Description: HCR Decoder: Common defines and structures; defines for
                switching error-generator, -detector, and -concealment;

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

#ifndef _AACDEC_HCR_TYPES_H_
#define _AACDEC_HCR_TYPES_H_



#include "FDK_bitstream.h"
#include "overlapadd.h"

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

#define  LINES_PER_UNIT                4

/* ------------------------------------------------ */
/* ------------------------------------------------ */
/* ----------- basic HCR configuration ------------ */


 #define  MAX_SFB_HCR                 (((1024/8) / LINES_PER_UNIT) * 8)  /* (8 * 16) is not enough because sfbs are split in units for blocktype short */
 #define  NUMBER_OF_UNIT_GROUPS       (LINES_PER_UNIT * 8)
 #define  LINES_PER_UNIT_GROUP        (1024 / NUMBER_OF_UNIT_GROUPS)     /* 15 16 30 32 */


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

#define  FROM_LEFT_TO_RIGHT            0
#define  FROM_RIGHT_TO_LEFT            1

#define  MAX_CB_PAIRS                  23
#define  MAX_HCR_SETS                  14

#define  ESCAPE_VALUE                  16
#define  POSITION_OF_FLAG_A            21
#define  POSITION_OF_FLAG_B            20

#define  MAX_CB                        32     /* last used CB is cb #31 when VCB11 is used */

#define  MAX_CB_CHECK                  32     /* support for VCB11 available -- is more general, could therefore used in both cases */

#define  NUMBER_OF_BIT_IN_WORD         32

/* log */
#define  THIRTYTWO_LOG_DIV_TWO_LOG     5
#define  EIGHT_LOG_DIV_TWO_LOG         3
#define  FOUR_LOG_DIV_TWO_LOG          2

/* borders */
#define  CPE_TOP_LENGTH                12288
#define  SCE_TOP_LENGTH                6144
#define  LEN_OF_LONGEST_CW_TOP_LENGTH  49

/* qsc's of high level */
#define  Q_VALUE_INVALID               8192   /* mark a invalid line with this value (to be concealed later on) */
#define  HCR_DIRAC                     500    /* a line of high level */

/* masks */
#define  MASK_LEFT                     0xFFF000
#define  MASK_RIGHT                    0xFFF
#define  CLR_BIT_10                    0x3FF
#define  TEST_BIT_10                   0x400

#define  LEFT_OFFSET                   12

/* when set HCR is replaced by a dummy-module which just fills the outputbuffer with a dirac sequence */
/* use this if HCR is suspected to write in other modules -- if error is stell there, HCR is innocent */
#define USE_HCR_DUMMY                     0


/* ------------------------------ */
/* -    insert HCR errors       - */
/* ------------------------------ */

  /* modify input lengths -- high protected */
#define ERROR_LORSD                       0  /* offset: error if different from zero */
#define ERROR_LOLC                        0  /* offset: error if different from zero */

  /* segments are earlier empty as expected when decoding PCWs */
#define ERROR_PCW_BODY                    0  /* set a positive values to trigger the error (make segments earlyer appear to be empty) */
#define ERROR_PCW_BODY_SIGN               0  /* set a positive values to trigger the error (make segments earlyer appear to be empty) */
#define ERROR_PCW_BODY_SIGN_ESC           0  /* set a positive values to trigger the error (make segments earlyer appear to be empty) */

  /* pretend there are too many bits decoded (enlarge length of codeword) at PCWs -- use a positive value */
#define ERROR_PCW_BODY_ONLY_TOO_LONG      0  /* set a positive values to trigger the error */
#define ERROR_PCW_BODY_SIGN_TOO_LONG      0  /* set a positive values to trigger the error */
#define ERROR_PCW_BODY_SIGN_ESC_TOO_LONG  0  /* set a positive values to trigger the error */

  /* modify HCR bitstream block */
#define ERROR_GENERATOR_BIT_STREAM_HCR    0  /* modify every <MODULO_DIVISOR_HCR>-bit when reading from bitstream */ /* !!! BEWARE!!! if RVLC is active, also RVLC data at ESC2 will be modified !!! */
#define MODULO_DIVISOR_HCR               30


/* ------------------------------ */
/* -    detect HCR errors       - */
/* ------------------------------ */
  /* check input data */
#define CHECK_VALID_HCR_INPUT             1  /* it is highly recommended to check input data */

  /* during decoding */
#define CHECK_SEGMENTATION_IMMEDIATELY    1  /* the 2 or 4 lines of a detected PCW-decoding-error is marked */

#define CHECK_SEGMENTATION_FINAL          1  /* all the segments are checked -- therefore -- if this check passes, its a kind of evidence that the
                                                decoded PCWs and non-PCWs are fine */

#define DETECT_TOO_LONG_CW_READS          1  /* if a codeword is decoded there exists a border for the number of bits, which are allowed to read for this
                                                codeword. This border is the minimum of the length of the longest codeword (for the currently used
                                                codebook) and the separately transmitted 'lengthOfLongestCodeword' in this frame and channel. The number
                                                of decoded bits is counted (for PCWs only -- there it makes really sense in my opinion). If this number
                                                exceeds the border (derived as minimum -- see above), a error is detected. */

#define STATE_MACHINE_ERROR_CHECK         1  /* test if the number of remaining bits in a segment is _below_ zero. If there are no errors the lowest
                                                allowed value for remainingBitsInSegment is zero. This check also could be set to zero (save runtime) */
  /* other */
#define VALID_LAV_ERROR_TRIGGER           1  /* when set to '1', avoid setting the LAV-Flag in errorLog due to a previous-line-marking (at PCW decoder). A little
                                                more runtime is needed then when writing values out into output-buffer. */

#define HCR_LISTEN_TO_MUTED_LINES         0  /* listen to the "error-concealment" for testing */

/* ------------------------------ */
/* -    conceal HCR errors      - */
/* ------------------------------ */

#define HCR_ERROR_CONCEALMENT             1  /* if set to '1', HCR _mutes_ the erred quantized spectral coefficients */


// ------------------------------------------------------------------------------------------------------------------
//                                         errorLog: A word of 32 bits used for logging possible errors within HCR
//                                                   in case of distorted bitstreams. Table of all known errors:
// ------------------------------------------------------------------------------------------------------------------------
                                                           // bit  fatal  location    meaning
                                                           // ----+-----+-----------+--------------------------------------
#define SEGMENT_OVERRIDE_ERR_PCW_BODY           0x80000000 //  31   no    PCW-Dec     During PCW decoding it is checked after every PCW if there are too many bits decoded (immediate check).
#define SEGMENT_OVERRIDE_ERR_PCW_BODY_SIGN      0x40000000 //  30   no    PCW-Dec     During PCW decoding it is checked after every PCW if there are too many bits decoded (immediate check).
#define SEGMENT_OVERRIDE_ERR_PCW_BODY_SIGN_ESC  0x20000000 //  29   no    PCW-Dec     During PCW decoding it is checked after every PCW if there are too many bits decoded (immediate check).
#define EXTENDED_SORTED_COUNTER_OVERFLOW        0x10000000 //  28   yes   Init-Dec    Error during extending sideinfo (neither a PCW nor a nonPCW was decoded so far)
                                             // 0x08000000 //  27                     reserved
                                             // 0x04000000 //  26                     reserved
                                             // 0x02000000 //  25                     reserved
                                             // 0x01000000 //  24                     reserved
                                             // 0x00800000 //  23                     reserved
                                             // 0x00400000 //  22                     reserved
                                             // 0x00200000 //  21                     reserved
                                             // 0x00100000 //  20                     reserved

                                           /* special errors */
#define TOO_MANY_PCW_BODY_BITS_DECODED          0x00080000 //  19   yes   PCW-Dec     During PCW-body-decoding too many bits have been read from bitstream -- advice: skip non-PCW decoding
#define TOO_MANY_PCW_BODY_SIGN_BITS_DECODED     0x00040000 //  18   yes   PCW-Dec     During PCW-body-sign-decoding too many bits have been read from bitstream -- advice: skip non-PCW decoding
#define TOO_MANY_PCW_BODY_SIGN_ESC_BITS_DECODED 0x00020000 //  17   yes   PCW-Dec     During PCW-body-sign-esc-decoding too many bits have been read from bitstream -- advice: skip non-PCW decoding


                                             // 0x00010000 //  16                     reserved
#define STATE_ERROR_BODY_ONLY                   0x00008000 //  15   no    NonPCW-Dec  State machine returned with error
#define STATE_ERROR_BODY_SIGN__BODY             0x00004000 //  14   no    NonPCW-Dec  State machine returned with error
#define STATE_ERROR_BODY_SIGN__SIGN             0x00002000 //  13   no    NonPCW-Dec  State machine returned with error
#define STATE_ERROR_BODY_SIGN_ESC__BODY         0x00001000 //  12   no    NonPCW-Dec  State machine returned with error
#define STATE_ERROR_BODY_SIGN_ESC__SIGN         0x00000800 //  11   no    NonPCW-Dec  State machine returned with error
#define STATE_ERROR_BODY_SIGN_ESC__ESC_PREFIX   0x00000400 //  10   no    NonPCW-Dec  State machine returned with error
#define STATE_ERROR_BODY_SIGN_ESC__ESC_WORD     0x00000200 //   9   no    NonPCW-Dec  State machine returned with error
#define HCR_SI_LENGTHS_FAILURE                  0x00000100 //   8   yes   Init-Dec    LengthOfLongestCodeword must not be less than lenghtOfReorderedSpectralData
#define NUM_SECT_OUT_OF_RANGE_SHORT_BLOCK       0x00000080 //   7   yes   Init-Dec    The number of sections is not within the allowed range (short block)
#define NUM_SECT_OUT_OF_RANGE_LONG_BLOCK        0x00000040 //   6   yes   Init-Dec    The number of sections is not within the allowed range (long block)
#define LINE_IN_SECT_OUT_OF_RANGE_SHORT_BLOCK   0x00000020 //   5   yes   Init-Dec    The number of lines per section is not within the allowed range (short block)
#define CB_OUT_OF_RANGE_SHORT_BLOCK             0x00000010 //   4   yes   Init-Dec    The codebook is not within the allowed range (short block)
#define LINE_IN_SECT_OUT_OF_RANGE_LONG_BLOCK    0x00000008 //   3   yes   Init-Dec    The number of lines per section is not within the allowed range (long block)
#define CB_OUT_OF_RANGE_LONG_BLOCK              0x00000004 //   2   yes   Init-Dec    The codebook is not within the allowed range (long block)
#define LAV_VIOLATION                           0x00000002 //   1   no    Final       The absolute value of at least one decoded line was too high for the according codebook.
#define BIT_IN_SEGMENTATION_ERROR               0x00000001 //   0   no    Final       After PCW and non-PWC-decoding at least one segment is not zero (global check).

                                              /*----------*/
#define HCR_FATAL_PCW_ERROR_MASK                0x100E01FC


typedef enum {
  PCW_BODY,
  PCW_BODY_SIGN,
  PCW_BODY_SIGN_ESC
} PCW_TYPE;


/* interface Decoder <---> HCR */
typedef struct {
  UINT          errorLog;
  SPECTRAL_PTR  pQuantizedSpectralCoefficientsBase;
  int           quantizedSpectralCoefficientsIdx;
  SHORT         lengthOfReorderedSpectralData;
  SHORT         numSection;
  SHORT        *pNumLineInSect;
  USHORT        bitstreamIndex;
  SCHAR         lengthOfLongestCodeword;
  UCHAR        *pCodebook;
} HCR_INPUT_OUTPUT;

typedef struct {
  const UCHAR *pMinOfCbPair;
  const UCHAR *pMaxOfCbPair;
} HCR_CB_PAIRS;

typedef struct{
  const USHORT *pLargestAbsVal;
  const UCHAR  *pMaxCwLength;
  const UCHAR  *pCbDimension;
  const UCHAR  *pCbDimShift;
  const UCHAR  *pCbSign;
  const UCHAR  *pCbPriority;
} HCR_TABLE_INFO;

typedef struct{
  UINT      numSegment;
  UINT      pSegmentBitfield[((1024>>1)/NUMBER_OF_BIT_IN_WORD+1)];
  UINT      pCodewordBitfield[((1024>>1)/NUMBER_OF_BIT_IN_WORD+1)];
  UINT      segmentOffset;
  FIXP_DBL  pTempValues[1024];
  USHORT    pLeftStartOfSegment[1024>>1];
  USHORT    pRightStartOfSegment[1024>>1];
  SCHAR     pRemainingBitsInSegment[1024>>1];
  UCHAR     readDirection;
  UCHAR     numWordForBitfield;
  USHORT    pNumBitValidInLastWord;
} HCR_SEGMENT_INFO;

typedef struct{

  UINT    numCodeword;
  UINT    numSortedSection;
  USHORT  pNumCodewordInSection[MAX_SFB_HCR];
  USHORT  pNumSortedCodewordInSection[MAX_SFB_HCR];
  USHORT  pNumExtendedSortedCodewordInSection[MAX_SFB_HCR+MAX_HCR_SETS];
  int     numExtendedSortedCodewordInSectionIdx;
  USHORT  pNumExtendedSortedSectionsInSets[MAX_HCR_SETS];
  int     numExtendedSortedSectionsInSetsIdx;
  USHORT  pReorderOffset[MAX_SFB_HCR];
  UCHAR   pSortedCodebook[MAX_SFB_HCR];

  UCHAR   pExtendedSortedCodebook[MAX_SFB_HCR+MAX_HCR_SETS];
  int     extendedSortedCodebookIdx;
#if DETECT_TOO_LONG_CW_READS
  UCHAR   pMaxLenOfCbInExtSrtSec[MAX_SFB_HCR+MAX_HCR_SETS];
  int     maxLenOfCbInExtSrtSecIdx;
#endif
  UCHAR   pCodebookSwitch[MAX_SFB_HCR];
} HCR_SECTION_INFO;

typedef UINT (*STATEFUNC)(HANDLE_FDK_BITSTREAM, void*);

typedef struct{
  /* worst-case and 1024/4 non-PCWs exist in worst-case */
  FIXP_DBL  *pResultBase;                           /* Base address for spectral data output target buffer */
  UINT       iNode[1024>>2];           /* Helper indices for code books */
  USHORT     iResultPointer[1024>>2];  /* Helper indices for accessing pResultBase */
  UINT       pEscapeSequenceInfo[1024>>2];
  UINT       codewordOffset;
  STATEFUNC  pState;
  UCHAR      pCodebook[1024>>2];
  UCHAR      pCntSign[1024>>2];
  /* this array holds the states coded as integer values within the range [0,1,..,7] */
  SCHAR      pSta[1024>>2];
} HCR_NON_PCW_SIDEINFO;

typedef struct{
  HCR_INPUT_OUTPUT      decInOut;
  HCR_CB_PAIRS          cbPairs;
  HCR_TABLE_INFO        tableInfo;
  HCR_SEGMENT_INFO      segmentInfo;
  HCR_SECTION_INFO      sectionInfo;
  HCR_NON_PCW_SIDEINFO  nonPcwSideinfo;

  INT                   globalHcrType;
} CErHcrInfo;


typedef  CErHcrInfo  *H_HCR_INFO;


#endif /* _AACDEC_HCR_TYPES_H_ */
