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/******************************************************************************
*
* Copyright (C) 2015 The Android Open Source Project
*
* 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.
*
*****************************************************************************
* Originally developed and contributed by Ittiam Systems Pvt. Ltd, Bangalore
*/
/**
*******************************************************************************
* @file
* ih264_padding.c
*
* @brief
* Contains function definitions for Padding
*
* @author
* Ittiam
*
* @par List of Functions:
* - ih264_pad_top()
* - ih264_pad_bottom()
* - ih264_pad_left_luma()
* - ih264_pad_left_chroma()
* - ih264_pad_right_luma()
* - ih264_pad_right_chroma()
*
* @remarks
* None
*
*******************************************************************************
*/
/*****************************************************************************/
/* File Includes */
/*****************************************************************************/
/* System include files */
#include <stddef.h>
#include <string.h>
/* User include files */
#include "ih264_typedefs.h"
#include "ih264_macros.h"
#include "ih264_padding.h"
/*****************************************************************************/
/* Function Definitions */
/*****************************************************************************/
/**
*******************************************************************************
*
* @brief pad at the top of a 2d array
*
* @par Description:
* The top row of a 2d array is replicated for pad_size times at the top
*
* @param[in] pu1_src
* UWORD8 pointer to the source
*
* @param[in] src_strd
* integer source stride
*
* @param[in] wd
* integer width of the array
*
* @param[in] pad_size
* integer -padding size of the array
*
* @returns none
*
* @remarks none
*
*******************************************************************************
*/
void ih264_pad_top(UWORD8 *pu1_src,
WORD32 src_strd,
WORD32 wd,
WORD32 pad_size)
{
WORD32 row;
for(row = 1; row <= pad_size; row++)
{
memcpy(pu1_src - row * src_strd, pu1_src, wd);
}
}
/**
*******************************************************************************
*
* @brief pad at the bottom of a 2d array
*
* @par Description:
* The bottom row of a 2d array is replicated for pad_size times at the bottom
*
* @param[in] pu1_src
* UWORD8 pointer to the source
*
* @param[in] src_strd
* integer source stride
*
* @param[in] wd
* integer width of the array
*
* @param[in] pad_size
* integer -padding size of the array
*
* @returns none
*
* @remarks none
*
*******************************************************************************
*/
void ih264_pad_bottom(UWORD8 *pu1_src,
WORD32 src_strd,
WORD32 wd,
WORD32 pad_size)
{
WORD32 row;
for(row = 1; row <= pad_size; row++)
{
memcpy(pu1_src + (row - 1) * src_strd, pu1_src - 1 * src_strd, wd);
}
}
/**
*******************************************************************************
*
* @brief pad (luma block) at the left of a 2d array
*
* @par Description:
* The left column of a 2d array is replicated for pad_size times to the left
*
* @param[in] pu1_src
* UWORD8 pointer to the source
*
* @param[in] src_strd
* integer source stride
*
* @param[in] ht
* integer height of the array
*
* @param[in] pad_size
* integer -padding size of the array
*
* @returns none
*
* @remarks none
*
*******************************************************************************
*/
void ih264_pad_left_luma(UWORD8 *pu1_src,
WORD32 src_strd,
WORD32 ht,
WORD32 pad_size)
{
WORD32 row;
for(row = 0; row < ht; row++)
{
memset(pu1_src - pad_size, *pu1_src, pad_size);
pu1_src += src_strd;
}
}
/**
*******************************************************************************
*
* @brief pad (chroma block) at the left of a 2d array
*
* @par Description:
* The left column of a 2d array is replicated for pad_size times to the left
*
* @param[in] pu1_src
* UWORD8 pointer to the source
*
* @param[in] src_strd
* integer source stride
*
* @param[in] ht
* integer height of the array
*
* @param[in] pad_size
* integer -padding size of the array
*
* @returns none
*
* @remarks none
*
*******************************************************************************
*/
void ih264_pad_left_chroma(UWORD8 *pu1_src,
WORD32 src_strd,
WORD32 ht,
WORD32 pad_size)
{
/* temp var */
WORD32 row, col;
UWORD16 u2_uv_val;
/* pointer to src */
UWORD16 *pu2_src = (UWORD16 *)pu1_src;
src_strd >>= 1;
pad_size >>= 1;
for(row = 0; row < ht; row++)
{
u2_uv_val = pu2_src[0];
for (col = -pad_size; col < 0; col++)
{
pu2_src[col] = u2_uv_val;
}
pu2_src += src_strd;
}
}
/**
*******************************************************************************
*
* @brief pad (luma block) at the right of a 2d array
*
* @par Description:
* The right column of a 2d array is replicated for pad_size times at the right
*
* @param[in] pu1_src
* UWORD8 pointer to the source
*
* @param[in] src_strd
* integer source stride
*
* @param[in] ht
* integer height of the array
*
* @param[in] pad_size
* integer -padding size of the array
*
* @returns none
*
* @remarks none
*
*******************************************************************************
*/
void ih264_pad_right_luma(UWORD8 *pu1_src,
WORD32 src_strd,
WORD32 ht,
WORD32 pad_size)
{
WORD32 row;
for(row = 0; row < ht; row++)
{
memset(pu1_src, *(pu1_src -1), pad_size);
pu1_src += src_strd;
}
}
/**
*******************************************************************************
*
* @brief pad (chroma block) at the right of a 2d array
*
* @par Description:
* The right column of a 2d array is replicated for pad_size times at the right
*
* @param[in] pu1_src
* UWORD8 pointer to the source
*
* @param[in] src_strd
* integer source stride
*
* @param[in] ht
* integer height of the array
*
* @param[in] pad_size
* integer -padding size of the array
*
* @returns none
*
* @remarks none
*
*******************************************************************************
*/
void ih264_pad_right_chroma(UWORD8 *pu1_src,
WORD32 src_strd,
WORD32 ht,
WORD32 pad_size)
{
WORD32 row, col;
UWORD16 u2_uv_val;
UWORD16 *pu2_src = (UWORD16 *)pu1_src;
src_strd >>= 1;
pad_size >>= 1;
for(row = 0; row < ht; row++)
{
u2_uv_val = pu2_src[-1];
for (col = 0; col < pad_size; col++)
{
pu2_src[col] = u2_uv_val;
}
pu2_src += src_strd;
}
}
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