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   dec_huftables.cpp - Huffman tables for AAC decoder.

    22  

    23   Author(s): Juha Ojanpera

    24   Copyright (c) 2000-2004 by Nokia Research Center, Speech and Audio Systems.

    25   *************************************************************************/

    26 

    27 /*-- Project Headers. --*/

    28 #include "dec_huf.h"

    29 #include "defines.h"

    30 #include "dec_const.h"

    31 

    32 /**************************************************************************

    33    Internal Objects

    34   *************************************************************************/

    35 

    36 /*

    37    Purpose:      Number of Huffman items within each codebook.

    38    Explanation:  - */

    39 

    40 

    41 /*

    42  * Deletes resources allocated to the Huffman codebooks.

    43  */

    44 void

    45 CloseHuffmanDecTables(Huffman_DecInfo **huf)

    46 {

    47   if(huf)

    48   {

    49     int16 i;

    50     

    51     for(i = 0; i < MAX_AAC_QHUFTABLES; i++)

    52     {

    53       if(huf[i] != 0)

    54         delete huf[i];

    55       huf[i] = NULL;

    56     }

    57     

    58     delete[] huf;

    59     huf = NULL;

    60   }

    61 }

    62 

    63 /**************************************************************************

    64   Title:      LoadHuffmanDecTablesL

    65 

    66   Purpose:    Loads Huffman spectral codebooks for AAC decoder.

    67 

    68   Usage:      y = LoadHuffmanDecTablesL()

    69 

    70   Output:     y - spectral codebooks

    71 

    72   Author(s):  Juha Ojanpera

    73   *************************************************************************/

    74 

    75 Huffman_DecInfo **

    76 LoadHuffmanDecTablesL(void)

    77 {

    78 

    79     /*

    80   Purpose:      Array holding the AAC Huffman decoding codebooks.

    81   Explanation:  - */

    82 const Huffman_DecCode *dec_huffman_tables[] = {

    83   dec_hftable1, dec_hftable2, dec_hftable3, dec_hftable4, dec_hftable5, 

    84   dec_hftable6, dec_hftable7, dec_hftable8, dec_hftable9, dec_hftable10, 

    85   dec_hftable11

    86 };

    87 

    88 

    89   int16 i;

    90   Huffman_DecInfo **huf;

    91   const Huffman_DecCode **hf_code;

    92 

    93   huf = (Huffman_DecInfo **) new (ELeave) Huffman_DecInfo*[MAX_AAC_QHUFTABLES];

    94   CleanupStack::PushL(huf);

    95 

    96   ZERO_MEMORY(huf, MAX_AAC_QHUFTABLES * sizeof(Huffman_DecInfo *));

    97   

    98   hf_code = dec_huffman_tables;

    99   for(i = 0; i < MAX_AAC_QHUFTABLES; i++)

   100   {

   101     huf[i] = (Huffman_DecInfo *) new (ELeave) Huffman_DecInfo[1];

   102     CleanupStack::PushL(huf[i]);

   103 

   104     ZERO_MEMORY(huf[i], sizeof(Huffman_DecInfo));

   105     

   106     huf[i]->huf = hf_code[i];

   107     

   108     huf[i]->cb_len = cb_len[i];

   109   }

   110 

   111   CleanupStack::Pop(MAX_AAC_QHUFTABLES + 1);

   112   

   113   return (huf);

   114 }

   115 

   116 /*

   117  * Deletes resources allocated to the Huffman scalefactor codebook.

   118  */

   119 void

   120 CloseSfHuffmanTable(Huffman_DecSfInfo *sfHuf)

   121 {

   122   if(sfHuf)

   123   {

   124     delete sfHuf;

   125     sfHuf = NULL;

   126   }

   127 }

   128 

   129 /**************************************************************************

   130   Title:      LoadSfHuffmanTableL

   131 

   132   Purpose:    Loads Huffman scalefactor codebook for AAC decoder.

   133 

   134   Usage:      y = LoadSfHuffmanTableL()

   135 

   136   Output:     y - scalefactor codebook

   137 

   138   Author(s):  Juha Ojanpera

   139   *************************************************************************/

   140 

   141 Huffman_DecSfInfo *

   142 LoadSfHuffmanTableL(void)

   143 {

   144   Huffman_DecSfInfo *huf;

   145 

   146   huf = (Huffman_DecSfInfo *) new (ELeave) Huffman_DecSfInfo[1];

   147 

   148   ZERO_MEMORY(huf, sizeof(Huffman_DecSfInfo));

   149 

   150   huf->cb_len = cb_len[11];

   151 

   152   huf->sf_param = dec_hftable12;

   153 

   154   return (huf);

   155 }