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 * Header for the aic (Advanced Intra Coding) module.

    17 *

    18 */

    19 

    20 

    21 

    22 #ifndef _VDCAIC_H_

    23 #define _VDCAIC_H_

    24 

    25 #include "epoclib.h"

    26 

    27 /*

    28  * Structs and typedefs

    29  */

    30 

    31 typedef struct {

    32    

    33     int16 *qpStore;    /* storage place for the QP values of MBs in the 

    34                            previous and current MB line */

    35 

    36     int ***dcStore;    /* storage place for the DC and first horizontal 

    37                            and vertical line of AC coefficients of the 

    38                            4+1+1 blocks of the MBs in the previous and 

    39                            current MB line */

    40 

    41     int numMBsInMBLine; /* number of MBs in a MB line for the calculation 

    42                            of the internal sorage index from currMBNum */

    43 

    44     int Xpos[6];        /* indexed by block number (0..5) of an MB gives 

    45                            relative MB index of left neighbor block */

    46 

    47     int Ypos[6];        /* indexed by block number (0..5) of an MB gives 

    48                            relative MB index of top neighbor block */

    49 

    50     int Xtab[6];        /* indexed by block number (0..5) of an MB gives 

    51                            block number of left neighbor block */

    52 

    53     int Ytab[6];        /* indexed by block number (0..5) of an MB gives 

    54                            block number of top neighbor block */

    55 

    56     int Ztab[6];        /* indexed by block number (0..5) of an MB gives 

    57                            block number of top-left neighbor block */

    58 

    59     u_char ACpred_flag; /* ON(1): AC prediction is used, OFF(0): only DC */

    60 

    61     int midGrey;       /* the grey value used for prediction direction

    62                            decision if prediction block is not available */

    63 } aicData_t;

    64 

    65 

    66 /*

    67  * Prototypes

    68  */

    69 

    70    void aicStart (aicData_t *aicData, int numMBsInMBLine, int16 *error);

    71 

    72    void aicFree (aicData_t *aicData);

    73 

    74    void aicBlockUpdate (aicData_t *aicData, int currMBNum, int blockNum, int *block,

    75                         int pquant, int DC_coeff);

    76 

    77    int aicIsBlockValid (aicData_t *aicData, int currMBNum);

    78 

    79    void aicDCACrecon (aicData_t *aicData, int QP, u_char fTopMBMissing, u_char fLeftMBMissing,

    80                       u_char fBBlockOut, int blockNum, int *qBlock, int currMBNum);

    81 

    82    int aicDCScaler (int QP, int type);

    83 

    84    u_char aicIntraDCSwitch (int intraDCVLCThr, int QP);

    85 

    86 #endif

    87 // End of File