1/* ----------------------------------------------------------------
2 *
3 *
4 * File Name:  omxVCM4P10_FilterDeblockingLuma_HorEdge_I.c
5 * OpenMAX DL: v1.0.2
6 * Revision:   9641
7 * Date:       Thursday, February 7, 2008
8 *
9 * (c) Copyright 2007-2008 ARM Limited. All Rights Reserved.
10 *
11 *
12 *
13 * H.264 luma deblock module
14 *
15 */
16
17#include "omxtypes.h"
18#include "armOMX.h"
19#include "omxVC.h"
20
21#include "armCOMM.h"
22#include "armVC.h"
23
24/**
25 * Function:  omxVCM4P10_FilterDeblockingLuma_HorEdge_I   (6.3.3.3.2)
26 *
27 * Description:
28 * Performs in-place deblock filtering on four horizontal edges of the luma
29 * macroblock (16x16).
30 *
31 * Input Arguments:
32 *
33 *   pSrcDst - pointer to the input macroblock; must be 16-byte aligned.
34 *   srcdstStep -s tep of the arrays; must be a multiple of 16.
35 *   pAlpha - array of size 2 of alpha thresholds (the first item is the alpha
36 *            threshold for the external vertical edge, and the second item is
37 *            for the internal horizontal edge); per [ISO14496-10] alpha
38 *            values must be in the range [0,255].
39 *   pBeta - array of size 2 of beta thresholds (the first item is the beta
40 *            threshold for the external horizontal edge, and the second item
41 *            is for the internal horizontal edge). Per [ISO14496-10] beta
42 *            values must be in the range [0,18].
43 *   pThresholds - array of size 16 containing thresholds, TC0, for the top
44 *            horizontal edge of each 4x4 block, arranged in horizontal block
45 *            order; must be aligned on a 4-byte boundary.  Per [ISO14496 10]
46 *            values must be in the range [0,25].
47 *   pBS - array of size 16 of BS parameters (arranged in horizontal block
48 *            order); valid in the range [0,4] with the following
49 *            restrictions: i) pBS[i]== 4 may occur only for 0<=i<=3, ii)
50 *            pBS[i]== 4 if and only if pBS[i^3]== 4.  Must be 4-byte aligned.
51 *
52 * Output Arguments:
53 *
54 *   pSrcDst -Pointer to filtered output macroblock.
55 *
56 * Return Value:
57 *
58 *    OMX_Sts_NoErr, if the function runs without error.
59 *
60 *    OMX_Sts_BadArgErr, if one of the following cases occurs:
61 *    -    one or more of the following pointers is NULL: pSrcDst, pAlpha,
62 *              pBeta, pThresholds, or pBS.
63 *    -    either pThresholds or pBS is not aligned on a 4-byte boundary.
64 *    -    pSrcDst is not 16-byte aligned.
65 *    -    srcdstStep is not a multiple of 16.
66 *    -    pAlpha[0] and/or pAlpha[1] is outside the range [0,255].
67 *    -    pBeta[0] and/or pBeta[1] is outside the range [0,18].
68 *    -    One or more entries in the table pThresholds[0..15] is
69 *         outside of the range [0,25].
70 *    -    pBS is out of range, i.e., one of the following conditions is true:
71 *              pBS[i]<0, pBS[i]>4, pBS[i]==4 for i>=4, or
72 *              (pBS[i]==4 && pBS[i^3]!=4) for 0<=i<=3.
73 *
74 */
75
76OMXResult omxVCM4P10_FilterDeblockingLuma_HorEdge_I(
77     OMX_U8* pSrcDst,
78     OMX_S32 srcdstStep,
79     const OMX_U8* pAlpha,
80     const OMX_U8* pBeta,
81     const OMX_U8* pThresholds,
82     const OMX_U8 *pBS
83 )
84{
85    int I, X, Y, Internal=0;
86
87    armRetArgErrIf(pSrcDst == NULL,             OMX_Sts_BadArgErr);
88    armRetArgErrIf(armNot8ByteAligned(pSrcDst), OMX_Sts_BadArgErr);
89    armRetArgErrIf(srcdstStep & 7,              OMX_Sts_BadArgErr);
90    armRetArgErrIf(pAlpha == NULL,              OMX_Sts_BadArgErr);
91    armRetArgErrIf(pBeta == NULL,               OMX_Sts_BadArgErr);
92    armRetArgErrIf(pThresholds == NULL,         OMX_Sts_BadArgErr);
93    armRetArgErrIf(armNot4ByteAligned(pThresholds), OMX_Sts_BadArgErr);
94    armRetArgErrIf(pBS == NULL,                     OMX_Sts_BadArgErr);
95    armRetArgErrIf(armNot4ByteAligned(pBS),         OMX_Sts_BadArgErr);
96
97    for (Y=0; Y<16; Y+=4, Internal=1)
98    {
99        for (X=0; X<16; X++)
100        {
101            I = (X>>2)+4*(Y>>2);
102
103            armRetArgErrIf(pBS[I] > 4, OMX_Sts_BadArgErr)
104
105            armRetArgErrIf( (I > 3) && (pBS[I] == 4),
106                            OMX_Sts_BadArgErr)
107
108            armRetArgErrIf( (I < 4)       &&
109                          ( (pBS[I] == 4) && (pBS[I^1] != 4) ),
110                            OMX_Sts_BadArgErr)
111
112            /* Filter horizontal edge with q0 at (X,Y) */
113            armVCM4P10_DeBlockPixel(
114                pSrcDst + Y*srcdstStep + X,
115                srcdstStep,
116                pThresholds[I],
117                pAlpha[Internal],
118                pBeta[Internal],
119                pBS[I],
120                0);
121        }
122    }
123
124    return OMX_Sts_NoErr;
125}
126