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 #ifdef CHECK_MV_RANGE

    21 #include <stdio.h>

    22 #endif

    23 

    24 #include "globals.h"

    25 #include "motcomp.h"

    26 #include "framebuffer.h"

    27 

    28 #if defined(USE_CLIPBUF) && !defined(AVC_MOTION_COMP_ASM)

    29 #include "clipbuf.h"

    30 #endif

    31 

    32 

    33 #define ONEFOURTH1  20

    34 #define ONEFOURTH2  -5

    35 #define ONEFOURTH3  1

    36 

    37 

    38 static const int numModeMotVecs[MOT_NUM_MODES+1] = {

    39   0, 1, 2, 2, 4, 8, 8, 16

    40 };

    41 

    42 static const int numModeMotVecs8x8[4] = {

    43   1, 2, 2, 4

    44 };

    45 

    46 /*

    47 static const int blockShapes[][2] = {

    48   {4, 4},

    49   {4, 2},

    50   {2, 4},

    51   {2, 2}

    52 };

    53 

    54 static const int blockShapes8x8[][2] = {

    55   {2, 2},

    56   {2, 1},

    57   {1, 2},

    58   {1, 1}

    59 };

    60 */

    61 

    62 

    63 #ifdef CHECK_MV_RANGE

    64 extern int maxVerticalMvRange;

    65 #endif

    66 

    67 

    68 /*

    69  *

    70  * mcpGetNumMotVecs:

    71  *

    72  * Parameters:

    73  *      mode                  MB partition type (16x16, 8x16, 16x8, 8x8)

    74  *      subMbTypes            Sub-MB partition types (8x8, 4x8, 8x4, 4x4)

    75  *

    76  * Function:

    77  *      Get the number of motion vectors that need to be decoded for given

    78  *      MB type and Sub-MB partition types.

    79  *      

    80  * Returns:

    81  *      Number of motion vectors.

    82  *

    83  */

    84 int mcpGetNumMotVecs(int interMode, int subMbTypes[4])

    85 {

    86   int numVecs;

    87 

    88   if (interMode < MOT_8x8)

    89     numVecs = numModeMotVecs[interMode];

    90   else {

    91     numVecs  = numModeMotVecs8x8[subMbTypes[0]];

    92     numVecs += numModeMotVecs8x8[subMbTypes[1]];

    93     numVecs += numModeMotVecs8x8[subMbTypes[2]];

    94     numVecs += numModeMotVecs8x8[subMbTypes[3]];

    95   }

    96 

    97   return numVecs;

    98 }

    99 

   100