ref: be9a1da2035540631d01cc40ac8243a84ae078ce
dir: /codec/decoder/core/src/decode_mb_aux.cpp/
/*!
* \copy
* Copyright (c) 2013, Cisco Systems
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
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* notice, this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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*/
#include <string.h>
#include "decode_mb_aux.h"
#include "wels_common_basis.h"
namespace WelsDec {
//NOTE::: p_RS should NOT be modified and it will lead to mismatch with JSVM.
// so should allocate kA array to store the temporary value (idct).
void IdctResAddPred_c (uint8_t* pPred, const int32_t kiStride, int16_t* pRs) {
int16_t iSrc[16];
uint8_t* pDst = pPred;
const int32_t kiStride2 = kiStride << 1;
const int32_t kiStride3 = kiStride + kiStride2;
int32_t i;
for (i = 0; i < 4; i++) {
const int32_t kiY = i << 2;
const int32_t kiT0 = pRs[kiY] + pRs[kiY + 2];
const int32_t kiT1 = pRs[kiY] - pRs[kiY + 2];
const int32_t kiT2 = (pRs[kiY + 1] >> 1) - pRs[kiY + 3];
const int32_t kiT3 = pRs[kiY + 1] + (pRs[kiY + 3] >> 1);
iSrc[kiY] = kiT0 + kiT3;
iSrc[kiY + 1] = kiT1 + kiT2;
iSrc[kiY + 2] = kiT1 - kiT2;
iSrc[kiY + 3] = kiT0 - kiT3;
}
for (i = 0; i < 4; i++) {
int32_t kT1 = iSrc[i] + iSrc[i + 8];
int32_t kT2 = iSrc[i + 4] + (iSrc[i + 12] >> 1);
int32_t kT3 = (32 + kT1 + kT2) >> 6;
int32_t kT4 = (32 + kT1 - kT2) >> 6;
pDst[i] = WelsClip1 (kT3 + pPred[i]);
pDst[i + kiStride3] = WelsClip1 (kT4 + pPred[i + kiStride3]);
kT1 = iSrc[i] - iSrc[i + 8];
kT2 = (iSrc[i + 4] >> 1) - iSrc[i + 12];
pDst[i + kiStride] = WelsClip1 (((32 + kT1 + kT2) >> 6) + pDst[i + kiStride]);
pDst[i + kiStride2] = WelsClip1 (((32 + kT1 - kT2) >> 6) + pDst[i + kiStride2]);
}
}
void IdctResAddPred8x8_c (uint8_t* pPred, const int32_t kiStride, int16_t* pRs) {
// To make the ASM code easy to write, should using one funciton to apply hor and ver together, such as we did on HEVC
// Ugly code, just for easy debug, the final version need optimization
int16_t p[8], b[8];
int16_t a[4];
int16_t iTmp[64];
int16_t iRes[64];
// Horizontal
for (int i = 0; i < 8; i++) {
for (int j = 0; j < 8; j++) {
p[j] = pRs[j + (i << 3)];
}
a[0] = p[0] + p[4];
a[1] = p[0] - p[4];
a[2] = p[6] - (p[2] >> 1);
a[3] = p[2] + (p[6] >> 1);
b[0] = a[0] + a[3];
b[2] = a[1] - a[2];
b[4] = a[1] + a[2];
b[6] = a[0] - a[3];
a[0] = -p[3] + p[5] - p[7] - (p[7] >> 1);
a[1] = p[1] + p[7] - p[3] - (p[3] >> 1);
a[2] = -p[1] + p[7] + p[5] + (p[5] >> 1);
a[3] = p[3] + p[5] + p[1] + (p[1] >> 1);
b[1] = a[0] + (a[3] >> 2);
b[3] = a[1] + (a[2] >> 2);
b[5] = a[2] - (a[1] >> 2);
b[7] = a[3] - (a[0] >> 2);
iTmp[0 + (i << 3)] = b[0] + b[7];
iTmp[1 + (i << 3)] = b[2] - b[5];
iTmp[2 + (i << 3)] = b[4] + b[3];
iTmp[3 + (i << 3)] = b[6] + b[1];
iTmp[4 + (i << 3)] = b[6] - b[1];
iTmp[5 + (i << 3)] = b[4] - b[3];
iTmp[6 + (i << 3)] = b[2] + b[5];
iTmp[7 + (i << 3)] = b[0] - b[7];
}
//Vertical
for (int i = 0; i < 8; i++) {
for (int j = 0; j < 8; j++) {
p[j] = iTmp[i + (j << 3)];
}
a[0] = p[0] + p[4];
a[1] = p[0] - p[4];
a[2] = p[6] - (p[2] >> 1);
a[3] = p[2] + (p[6] >> 1);
b[0] = a[0] + a[3];
b[2] = a[1] - a[2];
b[4] = a[1] + a[2];
b[6] = a[0] - a[3];
a[0] = -p[3] + p[5] - p[7] - (p[7] >> 1);
a[1] = p[1] + p[7] - p[3] - (p[3] >> 1);
a[2] = -p[1] + p[7] + p[5] + (p[5] >> 1);
a[3] = p[3] + p[5] + p[1] + (p[1] >> 1);
b[1] = a[0] + (a[3] >> 2);
b[7] = a[3] - (a[0] >> 2);
b[3] = a[1] + (a[2] >> 2);
b[5] = a[2] - (a[1] >> 2);
iRes[ (0 << 3) + i] = b[0] + b[7];
iRes[ (1 << 3) + i] = b[2] - b[5];
iRes[ (2 << 3) + i] = b[4] + b[3];
iRes[ (3 << 3) + i] = b[6] + b[1];
iRes[ (4 << 3) + i] = b[6] - b[1];
iRes[ (5 << 3) + i] = b[4] - b[3];
iRes[ (6 << 3) + i] = b[2] + b[5];
iRes[ (7 << 3) + i] = b[0] - b[7];
}
uint8_t* pDst = pPred;
for (int i = 0; i < 8; i++) {
for (int j = 0; j < 8; j++) {
pDst[i * kiStride + j] = WelsClip1 (((32 + iRes[ (i << 3) + j]) >> 6) + pDst[i * kiStride + j]);
}
}
}
void GetI4LumaIChromaAddrTable (int32_t* pBlockOffset, const int32_t kiYStride, const int32_t kiUVStride) {
int32_t* pOffset = pBlockOffset;
int32_t i;
const uint8_t kuiScan0 = g_kuiScan8[0];
for (i = 0; i < 16; i++) {
const uint32_t kuiA = g_kuiScan8[i] - kuiScan0;
const uint32_t kuiX = kuiA & 0x07;
const uint32_t kuiY = kuiA >> 3;
pOffset[i] = (kuiX + kiYStride * kuiY) << 2;
}
for (i = 0; i < 4; i++) {
const uint32_t kuiA = g_kuiScan8[i] - kuiScan0;
pOffset[16 + i] =
pOffset[20 + i] = ((kuiA & 0x07) + (kiUVStride/*>>1*/) * (kuiA >> 3)) << 2;
}
}
} // namespace WelsDec