1 /*

     2 * Copyright (c) 2010 Ixonos Plc.

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of the "Eclipse Public License v1.0"

     6 * which accompanies this distribution, and is available

     7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - Initial contribution

    11 *

    12 * Contributors:

    13 * Ixonos Plc

    14 *

    15 * Description:  

    16 *

    17 */

    18 

    19 

    20 

    21 #ifndef _MP3AACMANIPLIB_H_

    22 #define _MP3AACMANIPLIB_H_

    23 

    24 #include "tool.h"

    25 #include "sbr_codec.h"

    26 

    27 /*

    28   Purpose:     AAC decoder core.

    29   Explanation: - 

    30 

    31     Implemented in aacaud.cpp

    32 */

    33 

    34 class CAACAudDec : public CBase

    35 {

    36     

    37 public:

    38     

    39     static CAACAudDec* NewL(int16 aNumCh, int16 aNumCCh);

    40     ~CAACAudDec();

    41     

    42     void GetFIL(TBitStream *bs, uint32 prevEleID);

    43     int32 extension_payload(TBitStream *bs, int32 cnt, uint32 prevEleID);

    44     

    45     int16 numCh;

    46     int16 numCCh;

    47     int16 numOutCh;

    48     int16 samplesPerFrame;

    49     

    50     CToolInfo **tool;

    51     CMC_Info* mc_info;

    52     CCInfo **ccInfo;

    53     CWindowInfo **winInfo;

    54     

    55     /*-- Huffman tables. --*/

    56     Huffman_DecInfo **huf;

    57     Huffman_DecSfInfo *sf_huf;

    58     

    59     SbrBitStream *sbrStream;

    60     SBR_Decoder *sbrDecInfo;

    61     

    62 private:

    63     void ConstructL(int16 aNumCh, int16 aNumCCh);

    64     CAACAudDec();

    65     

    66     TInt windowAmount;

    67     

    68 };

    69 

    70 /*

    71 *    Methods for AAC gain manipulation -------------->

    72 */

    73 

    74 /*-- Closes AAC decoder handle. --*/

    75 IMPORT_C CAACAudDec *

    76 DeleteAACAudDec(CAACAudDec *aac);

    77 

    78 /*-- Creates AAC decoder handle. --*/

    79 IMPORT_C void

    80 CreateAACAudDecL(CAACAudDec*& aDecHandle, int16 numCh, int16 numCCh);

    81 

    82 

    83 /*-- Creates (e)AAC+ decoder handle. --*/

    84 IMPORT_C uint8

    85 CreateAACPlusAudDecL(CAACAudDec *aDecHandle, int16 sampleRateIdx, uint8 isStereo, uint8 isDualMono);

    86 

    87 

    88 /*-- Initializes AAC decoder handle. --*/

    89 IMPORT_C void

    90 InitAACAudDec(CAACAudDec *aac, int16 profile, int16 sampleRateIdx, uint8 is960);

    91 

    92 /*-- Resets AAC decoder handle. --*/

    93 IMPORT_C void

    94 ResetAACAudDec(CAACAudDec *aac);

    95 

    96 /*-- Counts AAC frame length (and parses the frame at same cost). --*/

    97 IMPORT_C int16

    98 CountAACChunkLength(TBitStream *bs, CAACAudDec *aac, int16 *bytesInFrame);

    99 

   100 /*-- Stores global gain values. --*/

   101 IMPORT_C void

   102 SetAACGlobalGains(TBitStream* bs,

   103                   uint8 numGains, uint8 *globalGain, uint32 *globalGainPos);

   104 

   105 

   106 IMPORT_C void

   107 SetAACPlusGlobalGains(TBitStream* bs, TBitStream* bsOut, CAACAudDec *aac, int16 gainChangeValue,

   108                   uint8 numGains, uint8 *globalGain, uint32 *globalGainPos);

   109 

   110 

   111 /*-- Extracts global gain values. --*/

   112 IMPORT_C uint8

   113 GetAACGlobalGains(TBitStream* bs, CAACAudDec *aac, uint8 nBufs, uint8 *globalGain, uint32 *globalGainPos);

   114 

   115 /**

   116  *

   117  * Retrieves decoder specific information for the

   118  * specified AAC encoder configuration. This information should be

   119  * placed in the MP4/3GP header to describe the encoder

   120  * parameters for the AAC decoder at the receiving end.

   121  *

   122  * @param aacInfo     Handle to AAC configuration information

   123  * @param pBuf        Pointer to decoder specific information buffer

   124  * @param nBytesInBuf Size of 'pBuf'

   125  *

   126  * @return          Number of bytes in 'pBuf'

   127  */

   128 IMPORT_C int16

   129 AACGetMP4ConfigInfo(int32 sampleRate, uint8 profile, uint8 nChannels, int16 frameLen,

   130                     uint8 *pBuf, uint8 nBytesInBuf);

   131 

   132 

   133 /*-- Checks whether parametric stereo enabled in the AAC bitstream. --*/

   134 IMPORT_C uint8

   135 IsAACParametricStereoEnabled(CAACAudDec *aac);

   136 

   137 

   138 

   139 /*-- Checks whether SBR enabled in the AAC bitstream. --*/

   140 IMPORT_C uint8

   141 IsAACSBREnabled(CAACAudDec *aac);

   142 

   143 

   144 /*

   145 * <-------    Methods for AAC gain manipulation

   146 */

   147 

   148 #endif