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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
* ih264e_half_pel.h
*
* @brief
* Contains extern declarations of subpel functions used by the encoder
*
* @author
* ittiam
*
* @remarks
* none
*
*******************************************************************************
*/
#ifndef IH264E_HALF_PEL_H_
#define IH264E_HALF_PEL_H_
/*****************************************************************************/
/* Global constants */
/*****************************************************************************/
/*
* Dimensions of subpel plane buffers
*/
#define HP_PL_WD MB_SIZE + 1
#define HP_PL_HT MB_SIZE + 1
/*****************************************************************************/
/* Extern Function Declarations */
/*****************************************************************************/
/**
*******************************************************************************
*
* @brief
* Interprediction luma filter for horizontal input (Filter run for width = 17
* and height =16)
*
* @par Description:
* Applies a 6 tap horizontal filter .The output is clipped to 8 bits
* sec 8.4.2.2.1 titled "Luma sample interpolation process"
*
* @param[in] pu1_src
* UWORD8 pointer to the source
*
* @param[out] pu1_dst
* UWORD8 pointer to the destination
*
* @param[in] src_strd
* integer source stride
*
* @param[in] dst_strd
* integer destination stride
*
* @returns
*
* @remarks
* None
*
*******************************************************************************
*/
typedef void ih264e_sixtapfilter_horz_ft(UWORD8 *pu1_src,
UWORD8 *pu1_dst,
WORD32 src_strd,
WORD32 dst_strd);
ih264e_sixtapfilter_horz_ft ih264e_sixtapfilter_horz;
/* arm assembly */
ih264e_sixtapfilter_horz_ft ih264e_sixtapfilter_horz_a9q;
ih264e_sixtapfilter_horz_ft ih264e_sixtapfilter_horz_av8;
/* x86 intrinsics*/
ih264e_sixtapfilter_horz_ft ih264e_sixtapfilter_horz_ssse3;
/**
*******************************************************************************
*
* @brief
* This function implements a two stage cascaded six tap filter. It applies
* the six tap filter in the vertical direction on the predictor values,
* followed by applying the same filter in the horizontal direction on the
* output of the first stage. The six tap filtering operation is described in
* sec 8.4.2.2.1 titled "Luma sample interpolation process" (Filter run for
* width = 17 and height = 17)
*
* @par Description:
* The function interpolates the predictors first in the vertical direction and
* then in the horizontal direction to output the (1/2,1/2). The output of the
* first stage of the filter is stored in the buffer pointed to by
* pi16_pred1(only in C) in 16 bit precision.
*
* @param[in] pu1_src
* UWORD8 pointer to the source
*
* @param[out] pu1_dst1
* UWORD8 pointer to the destination (Horizontal filtered output)
*
* @param[out] pu1_dst2
* UWORD8 pointer to the destination (output after applying vertical filter to
* the intermediate horizontal output)
*
* @param[in] src_strd
* integer source stride
* @param[in] dst_strd
* integer destination stride of pu1_dst
*
* @param[in] pi4_pred
* Pointer to 16bit intermediate buffer (used only in c)
*
* @param[in] i4_pred_strd
* integer destination stride of pi16_pred1
*
* @returns
*
* @remarks
* None
*
*******************************************************************************
*/
typedef void ih264e_sixtap_filter_2dvh_vert_ft(UWORD8 *pu1_src,
UWORD8 *pu1_dst1,
UWORD8 *pu1_dst2,
WORD32 src_strd,
WORD32 dst_strd,
WORD32 *pi4_pred,
WORD32 i4_pred_strd);
ih264e_sixtap_filter_2dvh_vert_ft ih264e_sixtap_filter_2dvh_vert;
/* assembly */
ih264e_sixtap_filter_2dvh_vert_ft ih264e_sixtap_filter_2dvh_vert_a9q;
ih264e_sixtap_filter_2dvh_vert_ft ih264e_sixtap_filter_2dvh_vert_av8;
/* x86 intrinsics */
ih264e_sixtap_filter_2dvh_vert_ft ih264e_sixtap_filter_2dvh_vert_ssse3;
#endif /* IH264E_HALF_PEL_H_ */
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