/******************************************************************************
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*
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* Copyright (C) 2018 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 est_sad.h
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*
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* \brief
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* This file contain SAD estimation functions declarations
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*
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* \date
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*
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* \author
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* ittiam
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*
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******************************************************************************
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*/
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#ifndef _EST_SAD_H_
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#define _EST_SAD_H_
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/* "est_sad_t->i4_use_est_intra_sad" Flag to control how the I frame SAD is estimated.
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If set to zero
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- it uses the Intra sad calculated by the previous P frame as
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the estimated sad for the current I frame
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else
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- it uses the ratio of P frame sads of the previous two GOPS and
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scales the I Frame sad with this ratio to estimate the current
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I frame SAD
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*/
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/* Estimating the Average SAD for the current picture type is done by:
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1) if picture_type is I
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- Estimated SAD = (n-1)th intra frame interval(ifi) P frame Avg SAD *
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( prev I frame SAD / (n-2)nd intra frame interval(ifi) P frame Avg SAD)
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- if only one IFI is encoded use the previous I frame SAD
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2) if picture type is P
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- Estimate SAD is previous P frame SAD
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3) The first P frame in a IFI could use a little better logic to decide the
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estimated SAD but currently we assume the last coded P frames SAD */
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/*****************************************************************************/
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/* Structure */
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/*****************************************************************************/
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typedef struct est_sad_t *est_sad_handle;
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/*****************************************************************************/
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/* Function Declarations */
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/*****************************************************************************/
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WORD32 est_sad_num_fill_use_free_memtab(
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est_sad_handle *est_sad, itt_memtab_t *ps_memtab, ITT_FUNC_TYPE_E e_func_type);
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void init_est_sad(est_sad_handle est_sad, WORD32 i4_use_est_frame_sad);
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UWORD32 get_est_sad(est_sad_handle est_sad, picture_type_e e_pic_type);
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void update_actual_sad(est_sad_handle est_sad, UWORD32 u4_actual_sad, picture_type_e e_pic_type);
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void update_actual_sad_for_intra(est_sad_handle est_sad, WORD32 i4_intra_frm_cost);
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void update_prev_frame_intra_sad(est_sad_handle ps_est_sad, WORD32 i4_intra_frm_sad);
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WORD32 get_prev_frame_intra_sad(est_sad_handle ps_est_sad);
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void update_prev_frame_sad(est_sad_handle ps_est_sad, WORD32 i4_frm_sad, picture_type_e e_pic_type);
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WORD32 get_prev_frame_sad(est_sad_handle ps_est_sad, picture_type_e e_pic_type);
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void reset_est_sad(est_sad_handle ps_est_sad);
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WORD32 update_ppic_sad(est_sad_handle est_sad, WORD32 i4_est_sad, WORD32 i4_prev_p_sad);
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#endif
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