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332 lines
7.5 KiB
332 lines
7.5 KiB
/******************************************************************************
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*
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* Copyright (C) 2015 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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*****************************************************************************
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* Originally developed and contributed by Ittiam Systems Pvt. Ltd, Bangalore
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*/
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/**
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*******************************************************************************
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* @file
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* ih264_padding.c
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*
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* @brief
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* Contains function definitions for Padding
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*
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* @author
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* Ittiam
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*
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* @par List of Functions:
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* - ih264_pad_top()
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* - ih264_pad_bottom()
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* - ih264_pad_left_luma()
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* - ih264_pad_left_chroma()
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* - ih264_pad_right_luma()
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* - ih264_pad_right_chroma()
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*
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* @remarks
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* None
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*
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*******************************************************************************
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*/
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/*****************************************************************************/
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/* File Includes */
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/*****************************************************************************/
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/* System include files */
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#include <stddef.h>
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#include <string.h>
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/* User include files */
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#include "ih264_typedefs.h"
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#include "ih264_macros.h"
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#include "ih264_padding.h"
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/*****************************************************************************/
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/* Function Definitions */
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/*****************************************************************************/
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/**
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*******************************************************************************
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*
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* @brief pad at the top of a 2d array
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*
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* @par Description:
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* The top row of a 2d array is replicated for pad_size times at the top
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*
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* @param[in] pu1_src
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* UWORD8 pointer to the source
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*
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* @param[in] src_strd
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* integer source stride
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*
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* @param[in] wd
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* integer width of the array
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*
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* @param[in] pad_size
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* integer -padding size of the array
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*
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* @returns none
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*
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* @remarks none
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*
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*******************************************************************************
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*/
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void ih264_pad_top(UWORD8 *pu1_src,
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WORD32 src_strd,
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WORD32 wd,
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WORD32 pad_size)
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{
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WORD32 row;
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for(row = 1; row <= pad_size; row++)
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{
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memcpy(pu1_src - row * src_strd, pu1_src, wd);
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}
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}
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/**
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*******************************************************************************
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*
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* @brief pad at the bottom of a 2d array
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*
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* @par Description:
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* The bottom row of a 2d array is replicated for pad_size times at the bottom
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*
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* @param[in] pu1_src
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* UWORD8 pointer to the source
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*
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* @param[in] src_strd
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* integer source stride
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*
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* @param[in] wd
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* integer width of the array
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*
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* @param[in] pad_size
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* integer -padding size of the array
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*
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* @returns none
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*
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* @remarks none
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*
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*******************************************************************************
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*/
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void ih264_pad_bottom(UWORD8 *pu1_src,
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WORD32 src_strd,
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WORD32 wd,
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WORD32 pad_size)
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{
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WORD32 row;
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for(row = 1; row <= pad_size; row++)
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{
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memcpy(pu1_src + (row - 1) * src_strd, pu1_src - 1 * src_strd, wd);
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}
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}
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/**
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*******************************************************************************
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*
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* @brief pad (luma block) at the left of a 2d array
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*
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* @par Description:
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* The left column of a 2d array is replicated for pad_size times to the left
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*
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* @param[in] pu1_src
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* UWORD8 pointer to the source
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*
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* @param[in] src_strd
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* integer source stride
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*
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* @param[in] ht
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* integer height of the array
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*
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* @param[in] pad_size
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* integer -padding size of the array
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*
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* @returns none
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*
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* @remarks none
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*
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*******************************************************************************
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*/
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void ih264_pad_left_luma(UWORD8 *pu1_src,
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WORD32 src_strd,
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WORD32 ht,
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WORD32 pad_size)
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{
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WORD32 row;
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for(row = 0; row < ht; row++)
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{
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memset(pu1_src - pad_size, *pu1_src, pad_size);
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pu1_src += src_strd;
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}
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}
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/**
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*******************************************************************************
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*
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* @brief pad (chroma block) at the left of a 2d array
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*
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* @par Description:
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* The left column of a 2d array is replicated for pad_size times to the left
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*
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* @param[in] pu1_src
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* UWORD8 pointer to the source
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*
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* @param[in] src_strd
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* integer source stride
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*
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* @param[in] ht
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* integer height of the array
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*
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* @param[in] pad_size
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* integer -padding size of the array
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*
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* @returns none
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*
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* @remarks none
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*
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*******************************************************************************
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*/
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void ih264_pad_left_chroma(UWORD8 *pu1_src,
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WORD32 src_strd,
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WORD32 ht,
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WORD32 pad_size)
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{
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/* temp var */
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WORD32 row, col;
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UWORD16 u2_uv_val;
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/* pointer to src */
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UWORD16 *pu2_src = (UWORD16 *)pu1_src;
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src_strd >>= 1;
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pad_size >>= 1;
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for(row = 0; row < ht; row++)
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{
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u2_uv_val = pu2_src[0];
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for (col = -pad_size; col < 0; col++)
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{
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pu2_src[col] = u2_uv_val;
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}
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pu2_src += src_strd;
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}
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}
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/**
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*******************************************************************************
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*
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* @brief pad (luma block) at the right of a 2d array
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*
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* @par Description:
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* The right column of a 2d array is replicated for pad_size times at the right
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*
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* @param[in] pu1_src
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* UWORD8 pointer to the source
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*
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* @param[in] src_strd
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* integer source stride
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*
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* @param[in] ht
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* integer height of the array
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*
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* @param[in] pad_size
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* integer -padding size of the array
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*
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* @returns none
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*
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* @remarks none
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*
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*******************************************************************************
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*/
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void ih264_pad_right_luma(UWORD8 *pu1_src,
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WORD32 src_strd,
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WORD32 ht,
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WORD32 pad_size)
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{
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WORD32 row;
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for(row = 0; row < ht; row++)
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{
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memset(pu1_src, *(pu1_src -1), pad_size);
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pu1_src += src_strd;
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}
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}
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/**
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*******************************************************************************
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*
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* @brief pad (chroma block) at the right of a 2d array
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*
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* @par Description:
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* The right column of a 2d array is replicated for pad_size times at the right
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*
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* @param[in] pu1_src
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* UWORD8 pointer to the source
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*
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* @param[in] src_strd
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* integer source stride
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*
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* @param[in] ht
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* integer height of the array
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*
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* @param[in] pad_size
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* integer -padding size of the array
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*
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* @returns none
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*
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* @remarks none
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*
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*******************************************************************************
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*/
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void ih264_pad_right_chroma(UWORD8 *pu1_src,
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WORD32 src_strd,
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WORD32 ht,
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WORD32 pad_size)
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{
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WORD32 row, col;
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UWORD16 u2_uv_val;
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UWORD16 *pu2_src = (UWORD16 *)pu1_src;
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src_strd >>= 1;
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pad_size >>= 1;
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for(row = 0; row < ht; row++)
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{
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u2_uv_val = pu2_src[-1];
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for (col = 0; col < pad_size; col++)
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{
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pu2_src[col] = u2_uv_val;
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}
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pu2_src += src_strd;
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}
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}
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