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/* ----------------------------------------------------------------
*
*
* File Name: omxVCM4P10_PredictIntra_4x4.c
* OpenMAX DL: v1.0.2
* Revision: 9641
* Date: Thursday, February 7, 2008
*
* (c) Copyright 2007-2008 ARM Limited. All Rights Reserved.
*
*
*
* H.264 4x4 intra prediction module
*
*/
#include "omxtypes.h"
#include "armOMX.h"
#include "omxVC.h"
#include "armCOMM.h"
#include "armVC.h"
/**
* Function: omxVCM4P10_PredictIntra_4x4 (6.3.3.1.1)
*
* Description:
* Perform Intra_4x4 prediction for luma samples. If the upper-right block is
* not available, then duplication work should be handled inside the function.
* Users need not define them outside.
*
* Input Arguments:
*
* pSrcLeft - Pointer to the buffer of 4 left pixels:
* p[x, y] (x = -1, y = 0..3)
* pSrcAbove - Pointer to the buffer of 8 above pixels:
* p[x,y] (x = 0..7, y =-1);
* must be aligned on a 4-byte boundary.
* pSrcAboveLeft - Pointer to the above left pixels: p[x,y] (x = -1, y = -1)
* leftStep - Step of left pixel buffer; must be a multiple of 4.
* dstStep - Step of the destination buffer; must be a multiple of 4.
* predMode - Intra_4x4 prediction mode.
* availability - Neighboring 4x4 block availability flag, refer to
* "Neighboring Macroblock Availability" .
*
* Output Arguments:
*
* pDst - Pointer to the destination buffer; must be aligned on a 4-byte
* boundary.
*
* Return Value:
* If the function runs without error, it returns OMX_Sts_NoErr.
* If one of the following cases occurs, the function returns
* OMX_Sts_BadArgErr:
* pDst is NULL.
* dstStep < 4, or dstStep is not a multiple of 4.
* leftStep is not a multiple of 4.
* predMode is not in the valid range of enumeration
* OMXVCM4P10Intra4x4PredMode.
* predMode is OMX_VC_4x4_VERT, but availability doesn't set OMX_VC_UPPER
* indicating p[x,-1] (x = 0..3) is not available.
* predMode is OMX_VC_4x4_HOR, but availability doesn't set OMX_VC_LEFT
* indicating p[-1,y] (y = 0..3) is not available.
* predMode is OMX_VC_4x4_DIAG_DL, but availability doesn't set
* OMX_VC_UPPER indicating p[x, 1] (x = 0..3) is not available.
* predMode is OMX_VC_4x4_DIAG_DR, but availability doesn't set
* OMX_VC_UPPER_LEFT or OMX_VC_UPPER or OMX_VC_LEFT indicating
* p[x,-1] (x = 0..3), or p[-1,y] (y = 0..3) or p[-1,-1] is not
* available.
* predMode is OMX_VC_4x4_VR, but availability doesn't set
* OMX_VC_UPPER_LEFT or OMX_VC_UPPER or OMX_VC_LEFT indicating
* p[x,-1] (x = 0..3), or p[-1,y] (y = 0..3) or p[-1,-1] is not
* available.
* predMode is OMX_VC_4x4_HD, but availability doesn't set
* OMX_VC_UPPER_LEFT or OMX_VC_UPPER or OMX_VC_LEFT indicating
* p[x,-1] (x = 0..3), or p[-1,y] (y = 0..3) or p[-1,-1] is not
* available.
* predMode is OMX_VC_4x4_VL, but availability doesn't set OMX_VC_UPPER
* indicating p[x,-1] (x = 0..3) is not available.
* predMode is OMX_VC_4x4_HU, but availability doesn't set OMX_VC_LEFT
* indicating p[-1,y] (y = 0..3) is not available.
* availability sets OMX_VC_UPPER, but pSrcAbove is NULL.
* availability sets OMX_VC_LEFT, but pSrcLeft is NULL.
* availability sets OMX_VC_UPPER_LEFT, but pSrcAboveLeft is NULL.
* either pSrcAbove or pDst is not aligned on a 4-byte boundary.
*
* Note:
* pSrcAbove, pSrcAbove, pSrcAboveLeft may be invalid pointers if
* they are not used by intra prediction as implied in predMode.
*
*/
OMXResult omxVCM4P10_PredictIntra_4x4(
const OMX_U8* pSrcLeft,
const OMX_U8 *pSrcAbove,
const OMX_U8 *pSrcAboveLeft,
OMX_U8* pDst,
OMX_INT leftStep,
OMX_INT dstStep,
OMXVCM4P10Intra4x4PredMode predMode,
OMX_S32 availability
)
{
int x, y;
OMX_U8 pTmp[10];
armRetArgErrIf(pDst == NULL, OMX_Sts_BadArgErr);
armRetArgErrIf((leftStep % 4) != 0, OMX_Sts_BadArgErr);
armRetArgErrIf((dstStep % 4) != 0, OMX_Sts_BadArgErr);
armRetArgErrIf((dstStep < 4), OMX_Sts_BadArgErr);
armRetArgErrIf(armNot4ByteAligned(pSrcAbove), OMX_Sts_BadArgErr);
armRetArgErrIf(armNot4ByteAligned(pDst), OMX_Sts_BadArgErr);
armRetArgErrIf((availability & OMX_VC_UPPER) && pSrcAbove == NULL, OMX_Sts_BadArgErr);
armRetArgErrIf((availability & OMX_VC_LEFT ) && pSrcLeft == NULL, OMX_Sts_BadArgErr);
armRetArgErrIf((availability & OMX_VC_UPPER_LEFT) && pSrcAboveLeft == NULL, OMX_Sts_BadArgErr);
armRetArgErrIf(predMode==OMX_VC_4X4_VERT && !(availability & OMX_VC_UPPER), OMX_Sts_BadArgErr);
armRetArgErrIf(predMode==OMX_VC_4X4_HOR && !(availability & OMX_VC_LEFT), OMX_Sts_BadArgErr);
armRetArgErrIf(predMode==OMX_VC_4X4_DIAG_DL && !(availability & OMX_VC_UPPER), OMX_Sts_BadArgErr);
armRetArgErrIf(predMode==OMX_VC_4X4_DIAG_DR && !(availability & OMX_VC_UPPER), OMX_Sts_BadArgErr);
armRetArgErrIf(predMode==OMX_VC_4X4_DIAG_DR && !(availability & OMX_VC_UPPER_LEFT), OMX_Sts_BadArgErr);
armRetArgErrIf(predMode==OMX_VC_4X4_DIAG_DR && !(availability & OMX_VC_LEFT), OMX_Sts_BadArgErr);
armRetArgErrIf(predMode==OMX_VC_4X4_VR && !(availability & OMX_VC_UPPER), OMX_Sts_BadArgErr);
armRetArgErrIf(predMode==OMX_VC_4X4_VR && !(availability & OMX_VC_UPPER_LEFT), OMX_Sts_BadArgErr);
armRetArgErrIf(predMode==OMX_VC_4X4_VR && !(availability & OMX_VC_LEFT), OMX_Sts_BadArgErr);
armRetArgErrIf(predMode==OMX_VC_4X4_HD && !(availability & OMX_VC_UPPER), OMX_Sts_BadArgErr);
armRetArgErrIf(predMode==OMX_VC_4X4_HD && !(availability & OMX_VC_UPPER_LEFT), OMX_Sts_BadArgErr);
armRetArgErrIf(predMode==OMX_VC_4X4_HD && !(availability & OMX_VC_LEFT), OMX_Sts_BadArgErr);
armRetArgErrIf(predMode==OMX_VC_4X4_VL && !(availability & OMX_VC_UPPER), OMX_Sts_BadArgErr);
armRetArgErrIf(predMode==OMX_VC_4X4_HU && !(availability & OMX_VC_LEFT), OMX_Sts_BadArgErr);
armRetArgErrIf((unsigned)predMode > OMX_VC_4X4_HU, OMX_Sts_BadArgErr);
/* Note: This code must not read the pSrc arrays unless the corresponding
* block is marked as available. If the block is not avaibable then pSrc
* may not be a valid pointer.
*
* Note: To make the code more readable we refer to the neighbouring pixels
* in variables named as below:
*
* UL U0 U1 U2 U3 U4 U5 U6 U7
* L0 xx xx xx xx
* L1 xx xx xx xx
* L2 xx xx xx xx
* L3 xx xx xx xx
*/
#define UL pSrcAboveLeft[0]
#define U0 pSrcAbove[0]
#define U1 pSrcAbove[1]
#define U2 pSrcAbove[2]
#define U3 pSrcAbove[3]
#define U4 pSrcAbove[4]
#define U5 pSrcAbove[5]
#define U6 pSrcAbove[6]
#define U7 pSrcAbove[7]
#define L0 pSrcLeft[0*leftStep]
#define L1 pSrcLeft[1*leftStep]
#define L2 pSrcLeft[2*leftStep]
#define L3 pSrcLeft[3*leftStep]
switch (predMode)
{
case OMX_VC_4X4_VERT:
for (y=0; y<4; y++)
{
pDst[y*dstStep+0] = U0;
pDst[y*dstStep+1] = U1;
pDst[y*dstStep+2] = U2;
pDst[y*dstStep+3] = U3;
}
break;
case OMX_VC_4X4_HOR:
for (x=0; x<4; x++)
{
pDst[0*dstStep+x] = L0;
pDst[1*dstStep+x] = L1;
pDst[2*dstStep+x] = L2;
pDst[3*dstStep+x] = L3;
}
break;
case OMX_VC_4X4_DC:
/* This can always be used even if no blocks available */
armVCM4P10_PredictIntraDC4x4(pSrcLeft, pSrcAbove, pDst, leftStep, dstStep, availability);
break;
case OMX_VC_4X4_DIAG_DL:
pTmp[0] = (OMX_U8)((U0 + 2*U1 + U2 + 2)>>2);
pTmp[1] = (OMX_U8)((U1 + 2*U2 + U3 + 2)>>2);
if (availability & OMX_VC_UPPER_RIGHT)
{
pTmp[2] = (OMX_U8)((U2 + 2*U3 + U4 + 2)>>2);
pTmp[3] = (OMX_U8)((U3 + 2*U4 + U5 + 2)>>2);
pTmp[4] = (OMX_U8)((U4 + 2*U5 + U6 + 2)>>2);
pTmp[5] = (OMX_U8)((U5 + 2*U6 + U7 + 2)>>2);
pTmp[6] = (OMX_U8)((U6 + 3*U7 + 2)>>2);
}
else
{
pTmp[2] = (OMX_U8)((U2 + 3*U3 + 2)>>2);
pTmp[3] = U3;
pTmp[4] = U3;
pTmp[5] = U3;
pTmp[6] = U3;
}
for (y=0; y<4; y++)
{
for (x=0; x<4; x++)
{
pDst[y*dstStep+x] = pTmp[x+y];
}
}
break;
case OMX_VC_4X4_DIAG_DR:
/* x-y = -3, -2, -1, 0, 1, 2, 3 */
pTmp[0] = (OMX_U8)((L1 + 2*L2 + L3 + 2)>>2);
pTmp[1] = (OMX_U8)((L0 + 2*L1 + L2 + 2)>>2);
pTmp[2] = (OMX_U8)((UL + 2*L0 + L1 + 2)>>2);
pTmp[3] = (OMX_U8)((U0 + 2*UL + L0 + 2)>>2);
pTmp[4] = (OMX_U8)((U1 + 2*U0 + UL + 2)>>2);
pTmp[5] = (OMX_U8)((U2 + 2*U1 + U0 + 2)>>2);
pTmp[6] = (OMX_U8)((U3 + 2*U2 + U1 + 2)>>2);
for (y=0; y<4; y++)
{
for (x=0; x<4; x++)
{
pDst[y*dstStep+x] = pTmp[3+x-y];
}
}
break;
case OMX_VC_4X4_VR:
/* zVR=2x-y = -3, -2, -1, 0, 1, 2, 3, 4, 5, 6
* x-(y>>1) = -1, -1, 0, 0, 1, 1, 2, 2, 3, 3
* y = 3, 2, ?, ?, ?, ?, ?, ?, 1, 0
*/
pTmp[0] = (OMX_U8)((L2 + 2*L1 + L0 + 2)>>2);
pTmp[1] = (OMX_U8)((L1 + 2*L0 + UL + 2)>>2);
pTmp[2] = (OMX_U8)((L0 + 2*UL + U0 + 2)>>2);
pTmp[3] = (OMX_U8)((UL + U0 + 1)>>1);
pTmp[4] = (OMX_U8)((UL + 2*U0 + U1 + 2)>>2);
pTmp[5] = (OMX_U8)((U0 + U1 + 1)>>1);
pTmp[6] = (OMX_U8)((U0 + 2*U1 + U2 + 2)>>2);
pTmp[7] = (OMX_U8)((U1 + U2 + 1)>>1);
pTmp[8] = (OMX_U8)((U1 + 2*U2 + U3 + 2)>>2);
pTmp[9] = (OMX_U8)((U2 + U3 + 1)>>1);
for (y=0; y<4; y++)
{
for (x=0; x<4; x++)
{
pDst[y*dstStep+x] = pTmp[3+2*x-y];
}
}
break;
case OMX_VC_4X4_HD:
/* zHD=2y-x = -3 -2 -1 0 1 2 3 4 5 6
* y-(x>>1) = -1 -1 0 0 1 1 2 2 3 3
* x = 3 2 1 0
*/
pTmp[0] = (OMX_U8)((U2 + 2*U1 + U0 + 2)>>2);
pTmp[1] = (OMX_U8)((U1 + 2*U0 + UL + 2)>>2);
pTmp[2] = (OMX_U8)((U0 + 2*UL + L0 + 2)>>2);
pTmp[3] = (OMX_U8)((UL + L0 + 1)>>1);
pTmp[4] = (OMX_U8)((UL + 2*L0 + L1 + 2)>>2);
pTmp[5] = (OMX_U8)((L0 + L1 + 1)>>1);
pTmp[6] = (OMX_U8)((L0 + 2*L1 + L2 + 2)>>2);
pTmp[7] = (OMX_U8)((L1 + L2 + 1)>>1);
pTmp[8] = (OMX_U8)((L1 + 2*L2 + L3 + 2)>>2);
pTmp[9] = (OMX_U8)((L2 + L3 + 1)>>1);
for (y=0; y<4; y++)
{
for (x=0; x<4; x++)
{
pDst[y*dstStep+x] = pTmp[3+2*y-x];
}
}
break;
case OMX_VC_4X4_VL:
/* Note: x+(y>>1) = (2*x+y)>>1
* 2x+y = 0 1 2 3 4 5 6 7 8 9
*/
pTmp[0] = (OMX_U8)((U0 + U1 + 1)>>1);
pTmp[1] = (OMX_U8)((U0 + 2*U1 + U2 + 2)>>2);
pTmp[2] = (OMX_U8)((U1 + U2 + 1)>>1);
pTmp[3] = (OMX_U8)((U1 + 2*U2 + U3 + 2)>>2);
pTmp[4] = (OMX_U8)((U2 + U3 + 1)>>1);
if (availability & OMX_VC_UPPER_RIGHT)
{
pTmp[5] = (OMX_U8)((U2 + 2*U3 + U4 + 2)>>2);
pTmp[6] = (OMX_U8)((U3 + U4 + 1)>>1);
pTmp[7] = (OMX_U8)((U3 + 2*U4 + U5 + 2)>>2);
pTmp[8] = (OMX_U8)((U4 + U5 + 1)>>1);
pTmp[9] = (OMX_U8)((U4 + 2*U5 + U6 + 2)>>2);
}
else
{
pTmp[5] = (OMX_U8)((U2 + 3*U3 + 2)>>2);
pTmp[6] = U3;
pTmp[7] = U3;
pTmp[8] = U3;
pTmp[9] = U3;
}
for (y=0; y<4; y++)
{
for (x=0; x<4; x++)
{
pDst[y*dstStep+x] = pTmp[2*x+y];
}
}
break;
case OMX_VC_4X4_HU:
/* zHU = x+2*y */
pTmp[0] = (OMX_U8)((L0 + L1 + 1)>>1);
pTmp[1] = (OMX_U8)((L0 + 2*L1 + L2 + 2)>>2);
pTmp[2] = (OMX_U8)((L1 + L2 + 1)>>1);
pTmp[3] = (OMX_U8)((L1 + 2*L2 + L3 + 2)>>2);
pTmp[4] = (OMX_U8)((L2 + L3 + 1)>>1);
pTmp[5] = (OMX_U8)((L2 + 3*L3 + 2)>>2);
pTmp[6] = L3;
pTmp[7] = L3;
pTmp[8] = L3;
pTmp[9] = L3;
for (y=0; y<4; y++)
{
for (x=0; x<4; x++)
{
pDst[y*dstStep+x] = pTmp[x+2*y];
}
}
break;
}
return OMX_Sts_NoErr;
}
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