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162 lines
5.2 KiB
162 lines
5.2 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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* ih264e_half_pel.h |
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* |
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* @brief |
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* Contains extern declarations of subpel functions used by the encoder |
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* |
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* @author |
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* ittiam |
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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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#ifndef IH264E_HALF_PEL_H_ |
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#define IH264E_HALF_PEL_H_ |
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/*****************************************************************************/ |
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/* Global constants */ |
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/*****************************************************************************/ |
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/* |
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* Dimensions of subpel plane buffers |
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*/ |
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#define HP_PL_WD MB_SIZE + 1 |
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#define HP_PL_HT MB_SIZE + 1 |
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/*****************************************************************************/ |
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/* Extern Function Declarations */ |
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/*****************************************************************************/ |
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/** |
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******************************************************************************* |
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* |
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* @brief |
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* Interprediction luma filter for horizontal input (Filter run for width = 17 |
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* and height =16) |
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* |
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* @par Description: |
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* Applies a 6 tap horizontal filter .The output is clipped to 8 bits |
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* sec 8.4.2.2.1 titled "Luma sample interpolation process" |
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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[out] pu1_dst |
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* UWORD8 pointer to the destination |
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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] dst_strd |
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* integer destination stride |
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* |
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* @returns |
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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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typedef void ih264e_sixtapfilter_horz_ft(UWORD8 *pu1_src, |
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UWORD8 *pu1_dst, |
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WORD32 src_strd, |
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WORD32 dst_strd); |
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ih264e_sixtapfilter_horz_ft ih264e_sixtapfilter_horz; |
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/* arm assembly */ |
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ih264e_sixtapfilter_horz_ft ih264e_sixtapfilter_horz_a9q; |
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ih264e_sixtapfilter_horz_ft ih264e_sixtapfilter_horz_av8; |
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/* x86 intrinsics*/ |
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ih264e_sixtapfilter_horz_ft ih264e_sixtapfilter_horz_ssse3; |
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/** |
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******************************************************************************* |
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* |
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* @brief |
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* This function implements a two stage cascaded six tap filter. It applies |
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* the six tap filter in the vertical direction on the predictor values, |
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* followed by applying the same filter in the horizontal direction on the |
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* output of the first stage. The six tap filtering operation is described in |
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* sec 8.4.2.2.1 titled "Luma sample interpolation process" (Filter run for |
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* width = 17 and height = 17) |
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* |
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* @par Description: |
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* The function interpolates the predictors first in the vertical direction and |
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* then in the horizontal direction to output the (1/2,1/2). The output of the |
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* first stage of the filter is stored in the buffer pointed to by |
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* pi16_pred1(only in C) in 16 bit precision. |
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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[out] pu1_dst1 |
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* UWORD8 pointer to the destination (Horizontal filtered output) |
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* |
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* @param[out] pu1_dst2 |
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* UWORD8 pointer to the destination (output after applying vertical filter to |
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* the intermediate horizontal output) |
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* |
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* @param[in] src_strd |
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* integer source stride |
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* @param[in] dst_strd |
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* integer destination stride of pu1_dst |
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* |
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* @param[in] pi4_pred |
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* Pointer to 16bit intermediate buffer (used only in c) |
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* |
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* @param[in] i4_pred_strd |
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* integer destination stride of pi16_pred1 |
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* |
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* @returns |
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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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typedef void ih264e_sixtap_filter_2dvh_vert_ft(UWORD8 *pu1_src, |
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UWORD8 *pu1_dst1, |
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UWORD8 *pu1_dst2, |
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WORD32 src_strd, |
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WORD32 dst_strd, |
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WORD32 *pi4_pred, |
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WORD32 i4_pred_strd); |
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ih264e_sixtap_filter_2dvh_vert_ft ih264e_sixtap_filter_2dvh_vert; |
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/* assembly */ |
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ih264e_sixtap_filter_2dvh_vert_ft ih264e_sixtap_filter_2dvh_vert_a9q; |
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ih264e_sixtap_filter_2dvh_vert_ft ih264e_sixtap_filter_2dvh_vert_av8; |
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/* x86 intrinsics */ |
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ih264e_sixtap_filter_2dvh_vert_ft ih264e_sixtap_filter_2dvh_vert_ssse3; |
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#endif /* IH264E_HALF_PEL_H_ */
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