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/*
* Copyright (C) 2007-2008 ARM Limited
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
/* ----------------------------------------------------------------
*
*
* File Name: armVCM4P10_DeBlockPixel.c
* OpenMAX DL: v1.0.2
* Revision: 9641
* Date: Thursday, February 7, 2008
*
*
*
*
* H.264 luma deblock module
*
*/
#ifdef DEBUG_ARMVCM4P10_DEBLOCKPIXEL
#undef DEBUG_ON
#define DEBUG_ON
#endif /* DEBUG_ARMVCM4P10_DEBLOCKPIXEL */
#include "omxtypes.h"
#include "armOMX.h"
#include "omxVC.h"
#include "armCOMM.h"
#include "armVC.h"
/*
* Description
* Deblock one boundary pixel
*
* Parameters:
* [in] pQ0 Pointer to pixel q0
* [in] Step Step between pixels q0 and q1
* [in] tC0 Edge threshold value
* [in] alpha alpha threshold value
* [in] beta beta threshold value
* [in] bS deblocking strength
* [in] ChromaFlag True for chroma blocks
* [out] pQ0 Deblocked pixels
*
*/
void armVCM4P10_DeBlockPixel(
OMX_U8 *pQ0, /* pointer to the pixel q0 */
int Step, /* step between pixels q0 and q1 */
int tC0, /* edge threshold value */
int alpha, /* alpha */
int beta, /* beta */
int bS, /* deblocking strength */
int ChromaFlag
)
{
int p3, p2, p1, p0, q0, q1, q2, q3;
int ap, aq, delta;
if (bS==0)
{
return;
}
p3 = pQ0[-4*Step];
p2 = pQ0[-3*Step];
p1 = pQ0[-2*Step];
p0 = pQ0[-1*Step];
q0 = pQ0[ 0*Step];
q1 = pQ0[ 1*Step];
q2 = pQ0[ 2*Step];
q3 = pQ0[ 3*Step];
if (armAbs(p0-q0)>=alpha || armAbs(p1-p0)>=beta || armAbs(q1-q0)>=beta)
{
DEBUG_PRINTF_10("DeBlockPixel: %02x %02x %02x %02x | %02x %02x %02x %02x alpha=%d beta=%d\n",
p3, p2, p1, p0, q0, q1, q2, q3, alpha, beta);
return;
}
ap = armAbs(p2 - p0);
aq = armAbs(q2 - q0);
if (bS < 4)
{
int tC = tC0;
if (ChromaFlag)
{
tC++;
}
else
{
if (ap < beta)
{
tC++;
}
if (aq < beta)
{
tC++;
}
}
delta = (((q0-p0)<<2) + (p1-q1) + 4) >> 3;
delta = armClip(-tC, tC, delta);
pQ0[-1*Step] = (OMX_U8)armClip(0, 255, p0 + delta);
pQ0[ 0*Step] = (OMX_U8)armClip(0, 255, q0 - delta);
if (ChromaFlag==0 && ap<beta)
{
delta = (p2 + ((p0+q0+1)>>1) - (p1<<1))>>1;
delta = armClip(-tC0, tC0, delta);
pQ0[-2*Step] = (OMX_U8)(p1 + delta);
}
if (ChromaFlag==0 && aq<beta)
{
delta = (q2 + ((p0+q0+1)>>1) - (q1<<1))>>1;
delta = armClip(-tC0, tC0, delta);
pQ0[ 1*Step] = (OMX_U8)(q1 + delta);
}
}
else /* bS==4 */
{
if (ChromaFlag==0 && ap<beta && armAbs(p0-q0)<((alpha>>2)+2))
{
pQ0[-1*Step] = (OMX_U8)((p2 + 2*p1 + 2*p0 + 2*q0 + q1 + 4)>>3);
pQ0[-2*Step] = (OMX_U8)((p2 + p1 + p0 + q0 + 2)>>2);
pQ0[-3*Step] = (OMX_U8)((2*p3 + 3*p2 + p1 + p0 + q0 + 4)>>3);
}
else
{
pQ0[-1*Step] = (OMX_U8)((2*p1 + p0 + q1 + 2)>>2);
}
if (ChromaFlag==0 && aq<beta && armAbs(p0-q0)<((alpha>>2)+2))
{
pQ0[ 0*Step] = (OMX_U8)((q2 + 2*q1 + 2*q0 + 2*p0 + p1 + 4)>>3);
pQ0[ 1*Step] = (OMX_U8)((q2 + q1 + p0 + q0 + 2)>>2);
pQ0[ 2*Step] = (OMX_U8)((2*q3 + 3*q2 + q1 + q0 + p0 + 4)>>3);
}
else
{
pQ0[ 0*Step] = (OMX_U8)((2*q1 + q0 + p1 + 2)>>2);
}
}
DEBUG_PRINTF_13("DeBlockPixel: %02x %02x %02x %02x | %02x %02x %02x %02x bS=%d -> %02x %02x %02x %02x\n",
p3, p2, p1, p0, q0, q1, q2, q3, bS,
pQ0[-2*Step], pQ0[-1*Step],pQ0[0*Step],pQ0[1*Step]);
}
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