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/******************************************************************************
*
* Copyright (C) 2012 Ittiam Systems Pvt Ltd, Bangalore
*
* 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
* ihevc_weighted_pred.c
*
* @brief
* Contains function definitions for weighted prediction used in inter
* prediction
*
* @author
* Srinivas T
*
* @par List of Functions:
* - ihevc_weighted_pred_uni()
* - ihevc_weighted_pred_bi()
* - ihevc_weighted_pred_bi_default()
* - ihevc_weighted_pred_chroma_uni()
* - ihevc_weighted_pred_chroma_bi()
* - ihevc_weighted_pred_chroma_bi_default()
*
* @remarks
* None
*
*******************************************************************************
*/
/*****************************************************************************/
/* File Includes */
/*****************************************************************************/
#include "ihevc_typedefs.h"
#include "ihevc_defs.h"
#include "ihevc_macros.h"
#include "ihevc_platform_macros.h"
#include "ihevc_func_selector.h"
#include "ihevc_inter_pred.h"
/**
*******************************************************************************
*
* @brief
* Does uni-weighted prediction on the array pointed by pi2_src and stores
* it at the location pointed by pi2_dst
*
* @par Description:
* dst = ( (src + lvl_shift) * wgt0 + (1 << (shift - 1)) ) >> shift +
* offset
*
* @param[in] pi2_src
* Pointer to the source
*
* @param[out] pu1_dst
* Pointer to the destination
*
* @param[in] src_strd
* Source stride
*
* @param[in] dst_strd
* Destination stride
*
* @param[in] wgt0
* weight to be multiplied to the source
*
* @param[in] off0
* offset to be added after rounding and
*
* @param[in] shifting
*
*
* @param[in] shift
* (14 Bit depth) + log2_weight_denominator
*
* @param[in] lvl_shift
* added before shift and offset
*
* @param[in] ht
* height of the source
*
* @param[in] wd
* width of the source
*
* @returns
*
* @remarks
* None
*
*******************************************************************************
*/
void ihevc_weighted_pred_uni(WORD16 *pi2_src,
UWORD8 *pu1_dst,
WORD32 src_strd,
WORD32 dst_strd,
WORD32 wgt0,
WORD32 off0,
WORD32 shift,
WORD32 lvl_shift,
WORD32 ht,
WORD32 wd)
{
WORD32 row, col;
WORD32 i4_tmp;
for(row = 0; row < ht; row++)
{
for(col = 0; col < wd; col++)
{
i4_tmp = (pi2_src[col] + lvl_shift) * wgt0;
i4_tmp += 1 << (shift - 1);
i4_tmp = (i4_tmp >> shift) + off0;
pu1_dst[col] = CLIP_U8(i4_tmp);
}
pi2_src += src_strd;
pu1_dst += dst_strd;
}
}
//WEIGHTED_PRED_UNI
/**
*******************************************************************************
*
* @brief
* Does chroma uni-weighted prediction on array pointed by pi2_src and stores
* it at the location pointed by pi2_dst
*
* @par Description:
* dst = ( (src + lvl_shift) * wgt0 + (1 << (shift - 1)) ) >> shift +
* offset
*
* @param[in] pi2_src
* Pointer to the source
*
* @param[out] pu1_dst
* Pointer to the destination
*
* @param[in] src_strd
* Source stride
*
* @param[in] dst_strd
* Destination stride
*
* @param[in] wgt0
* weight to be multiplied to the source
*
* @param[in] off0
* offset to be added after rounding and
*
* @param[in] shifting
*
*
* @param[in] shift
* (14 Bit depth) + log2_weight_denominator
*
* @param[in] lvl_shift
* added before shift and offset
*
* @param[in] ht
* height of the source
*
* @param[in] wd
* width of the source (each colour component)
*
* @returns
*
* @remarks
* None
*
*******************************************************************************
*/
void ihevc_weighted_pred_chroma_uni(WORD16 *pi2_src,
UWORD8 *pu1_dst,
WORD32 src_strd,
WORD32 dst_strd,
WORD32 wgt0_cb,
WORD32 wgt0_cr,
WORD32 off0_cb,
WORD32 off0_cr,
WORD32 shift,
WORD32 lvl_shift,
WORD32 ht,
WORD32 wd)
{
WORD32 row, col;
WORD32 i4_tmp;
for(row = 0; row < ht; row++)
{
for(col = 0; col < 2 * wd; col += 2)
{
i4_tmp = (pi2_src[col] + lvl_shift) * wgt0_cb;
i4_tmp += 1 << (shift - 1);
i4_tmp = (i4_tmp >> shift) + off0_cb;
pu1_dst[col] = CLIP_U8(i4_tmp);
i4_tmp = (pi2_src[col + 1] + lvl_shift) * wgt0_cr;
i4_tmp += 1 << (shift - 1);
i4_tmp = (i4_tmp >> shift) + off0_cr;
pu1_dst[col + 1] = CLIP_U8(i4_tmp);
}
pi2_src += src_strd;
pu1_dst += dst_strd;
}
}
//WEIGHTED_PRED_CHROMA_UNI
/**
*******************************************************************************
*
* @brief
* Does bi-weighted prediction on the arrays pointed by pi2_src1 and
* pi2_src2 and stores it at location pointed by pi2_dst
*
* @par Description:
* dst = ( (src1 + lvl_shift1)*wgt0 + (src2 + lvl_shift2)*wgt1 + (off0 +
* off1 + 1) << (shift - 1) ) >> shift
*
* @param[in] pi2_src1
* Pointer to source 1
*
* @param[in] pi2_src2
* Pointer to source 2
*
* @param[out] pu1_dst
* Pointer to destination
*
* @param[in] src_strd1
* Source stride 1
*
* @param[in] src_strd2
* Source stride 2
*
* @param[in] dst_strd
* Destination stride
*
* @param[in] wgt0
* weight to be multiplied to source 1
*
* @param[in] off0
* offset 0
*
* @param[in] wgt1
* weight to be multiplied to source 2
*
* @param[in] off1
* offset 1
*
* @param[in] shift
* (14 Bit depth) + log2_weight_denominator
*
* @param[in] lvl_shift1
* added before shift and offset
*
* @param[in] lvl_shift2
* added before shift and offset
*
* @param[in] ht
* height of the source
*
* @param[in] wd
* width of the source
*
* @returns
*
* @remarks
* None
*
*******************************************************************************
*/
void ihevc_weighted_pred_bi(WORD16 *pi2_src1,
WORD16 *pi2_src2,
UWORD8 *pu1_dst,
WORD32 src_strd1,
WORD32 src_strd2,
WORD32 dst_strd,
WORD32 wgt0,
WORD32 off0,
WORD32 wgt1,
WORD32 off1,
WORD32 shift,
WORD32 lvl_shift1,
WORD32 lvl_shift2,
WORD32 ht,
WORD32 wd)
{
WORD32 row, col;
WORD32 i4_tmp;
for(row = 0; row < ht; row++)
{
for(col = 0; col < wd; col++)
{
i4_tmp = (pi2_src1[col] + lvl_shift1) * wgt0;
i4_tmp += (pi2_src2[col] + lvl_shift2) * wgt1;
i4_tmp += (off0 + off1 + 1) << (shift - 1);
pu1_dst[col] = CLIP_U8(i4_tmp >> shift);
}
pi2_src1 += src_strd1;
pi2_src2 += src_strd2;
pu1_dst += dst_strd;
}
}
//WEIGHTED_PRED_BI
/**
*******************************************************************************
*
* @brief
* Does chroma bi-weighted prediction on the arrays pointed by pi2_src1 and
* pi2_src2 and stores it at location pointed by pi2_dst
*
* @par Description:
* dst = ( (src1 + lvl_shift1)*wgt0 + (src2 + lvl_shift2)*wgt1 + (off0 +
* off1 + 1) << (shift - 1) ) >> shift
*
* @param[in] pi2_src1
* Pointer to source 1
*
* @param[in] pi2_src2
* Pointer to source 2
*
* @param[out] pu1_dst
* Pointer to destination
*
* @param[in] src_strd1
* Source stride 1
*
* @param[in] src_strd2
* Source stride 2
*
* @param[in] dst_strd
* Destination stride
*
* @param[in] wgt0
* weight to be multiplied to source 1
*
* @param[in] off0
* offset 0
*
* @param[in] wgt1
* weight to be multiplied to source 2
*
* @param[in] off1
* offset 1
*
* @param[in] shift
* (14 Bit depth) + log2_weight_denominator
*
* @param[in] lvl_shift1
* added before shift and offset
*
* @param[in] lvl_shift2
* added before shift and offset
*
* @param[in] ht
* height of the source
*
* @param[in] wd
* width of the source (each colour component)
*
* @returns
*
* @remarks
* None
*
*******************************************************************************
*/
void ihevc_weighted_pred_chroma_bi(WORD16 *pi2_src1,
WORD16 *pi2_src2,
UWORD8 *pu1_dst,
WORD32 src_strd1,
WORD32 src_strd2,
WORD32 dst_strd,
WORD32 wgt0_cb,
WORD32 wgt0_cr,
WORD32 off0_cb,
WORD32 off0_cr,
WORD32 wgt1_cb,
WORD32 wgt1_cr,
WORD32 off1_cb,
WORD32 off1_cr,
WORD32 shift,
WORD32 lvl_shift1,
WORD32 lvl_shift2,
WORD32 ht,
WORD32 wd)
{
WORD32 row, col;
WORD32 i4_tmp;
for(row = 0; row < ht; row++)
{
for(col = 0; col < 2 * wd; col += 2)
{
i4_tmp = (pi2_src1[col] + lvl_shift1) * wgt0_cb;
i4_tmp += (pi2_src2[col] + lvl_shift2) * wgt1_cb;
i4_tmp += (off0_cb + off1_cb + 1) << (shift - 1);
pu1_dst[col] = CLIP_U8(i4_tmp >> shift);
i4_tmp = (pi2_src1[col + 1] + lvl_shift1) * wgt0_cr;
i4_tmp += (pi2_src2[col + 1] + lvl_shift2) * wgt1_cr;
i4_tmp += (off0_cr + off1_cr + 1) << (shift - 1);
pu1_dst[col + 1] = CLIP_U8(i4_tmp >> shift);
}
pi2_src1 += src_strd1;
pi2_src2 += src_strd2;
pu1_dst += dst_strd;
}
}
//WEIGHTED_PRED_CHROMA_BI
/**
*******************************************************************************
*
* @brief
* Does default bi-weighted prediction on the arrays pointed by pi2_src1 and
* pi2_src2 and stores it at location pointed by pi2_dst
*
* @par Description:
* dst = ( (src1 + lvl_shift1) + (src2 + lvl_shift2) + 1 << (shift - 1) )
* >> shift where shift = 15 - BitDepth
*
* @param[in] pi2_src1
* Pointer to source 1
*
* @param[in] pi2_src2
* Pointer to source 2
*
* @param[out] pu1_dst
* Pointer to destination
*
* @param[in] src_strd1
* Source stride 1
*
* @param[in] src_strd2
* Source stride 2
*
* @param[in] dst_strd
* Destination stride
*
* @param[in] lvl_shift1
* added before shift and offset
*
* @param[in] lvl_shift2
* added before shift and offset
*
* @param[in] ht
* height of the source
*
* @param[in] wd
* width of the source
*
* @returns
*
* @remarks
* None
*
*******************************************************************************
*/
void ihevc_weighted_pred_bi_default(WORD16 *pi2_src1,
WORD16 *pi2_src2,
UWORD8 *pu1_dst,
WORD32 src_strd1,
WORD32 src_strd2,
WORD32 dst_strd,
WORD32 lvl_shift1,
WORD32 lvl_shift2,
WORD32 ht,
WORD32 wd)
{
WORD32 row, col;
WORD32 i4_tmp;
WORD32 shift;
shift = SHIFT_14_MINUS_BIT_DEPTH + 1;
for(row = 0; row < ht; row++)
{
for(col = 0; col < wd; col++)
{
i4_tmp = pi2_src1[col] + lvl_shift1;
i4_tmp += pi2_src2[col] + lvl_shift2;
i4_tmp += 1 << (shift - 1);
pu1_dst[col] = CLIP_U8(i4_tmp >> shift);
}
pi2_src1 += src_strd1;
pi2_src2 += src_strd2;
pu1_dst += dst_strd;
}
}
//WEIGHTED_PRED_BI_DEFAULT
/**
*******************************************************************************
*
* @brief
* Does chroma default bi-weighted prediction on arrays pointed by pi2_src1 and
* pi2_src2 and stores it at location pointed by pi2_dst
*
* @par Description:
* dst = ( (src1 + lvl_shift1) + (src2 + lvl_shift2) + 1 << (shift - 1) )
* >> shift where shift = 15 - BitDepth
*
* @param[in] pi2_src1
* Pointer to source 1
*
* @param[in] pi2_src2
* Pointer to source 2
*
* @param[out] pu1_dst
* Pointer to destination
*
* @param[in] src_strd1
* Source stride 1
*
* @param[in] src_strd2
* Source stride 2
*
* @param[in] dst_strd
* Destination stride
*
* @param[in] lvl_shift1
* added before shift and offset
*
* @param[in] lvl_shift2
* added before shift and offset
*
* @param[in] ht
* height of the source
*
* @param[in] wd
* width of the source (each colour component)
*
* @returns
*
* @remarks
* None
*
*******************************************************************************
*/
void ihevc_weighted_pred_chroma_bi_default(WORD16 *pi2_src1,
WORD16 *pi2_src2,
UWORD8 *pu1_dst,
WORD32 src_strd1,
WORD32 src_strd2,
WORD32 dst_strd,
WORD32 lvl_shift1,
WORD32 lvl_shift2,
WORD32 ht,
WORD32 wd)
{
WORD32 row, col;
WORD32 i4_tmp;
WORD32 shift;
shift = SHIFT_14_MINUS_BIT_DEPTH + 1;
for(row = 0; row < ht; row++)
{
for(col = 0; col < 2 * wd; col++)
{
i4_tmp = pi2_src1[col] + lvl_shift1;
i4_tmp += pi2_src2[col] + lvl_shift2;
i4_tmp += 1 << (shift - 1);
pu1_dst[col] = CLIP_U8(i4_tmp >> shift);
}
pi2_src1 += src_strd1;
pi2_src2 += src_strd2;
pu1_dst += dst_strd;
}
}
//WEIGHTED_PRED_CHROMA_BI_DEFAULT
|
