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_huf.h - AAC Huffman decoding declarations.

    22  

    23   Author(s): Juha Ojanpera

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

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

    26 

    27 #ifndef DEC_HUFFMAN_H_

    28 #define DEC_HUFFMAN_H_

    29 

    30 /*-- Project Headers. --*/

    31 #include "defines.h"

    32 

    33 #define MAX_AAC_QHUFTABLES (11)

    34 

    35 /*

    36   Purpose:      Structure defining Huffman codeword values for

    37                 quantized spectral coefficients.

    38   Explanation:  - */

    39 

    40 typedef struct Huffman_DecCodeStr

    41 {

    42   uint16 huf_param;  /* Quantized spectral coefficients. */

    43   uint16 codeword;   /* Huffman codeword.                */

    44     

    45 } Huffman_DecCode;

    46 

    47 /*

    48   Purpose:      Structure defining Huffman codebook parameters for

    49                 quantized spectral coefficients.

    50   Explanation:  - */

    51 typedef struct Huffman_DecInfoStr

    52 {

    53   int16 cb_len;               /* Codebook size.                         */

    54   const Huffman_DecCode *huf; /* Codeword parameters for this codebook. */

    55     

    56 } Huffman_DecInfo;

    57 

    58 /*

    59   Purpose:      Structure defining Huffman codebook parameters for

    60                 scalefactors.

    61   Explanation:  - */

    62 typedef struct Huffman_DecSfInfoStr

    63 {

    64   int16 cb_len;           /* Codebook size.       */

    65   const uint32 *sf_param; /* Codeword parameters. */

    66     

    67 } Huffman_DecSfInfo;

    68 

    69 

    70 

    71 /*-- Following functions are implemented in module 'dec_huftables.c'. --*/

    72 Huffman_DecInfo **LoadHuffmanDecTablesL(void);

    73 void CloseHuffmanDecTables(Huffman_DecInfo **);

    74 Huffman_DecSfInfo *LoadSfHuffmanTableL(void);

    75 void CloseSfHuffmanTable(Huffman_DecSfInfo *sfHuf);

    76 

    77 #endif /*-- DEC_HUFFMAN_H_ --*/