206 lines
5.1 KiB
C
206 lines
5.1 KiB
C
/******************************************************************************
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*
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* Copyright (C) 2022 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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* isvce_downscaler.h
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*
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* @brief
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* Contains downscaler functions required by the SVC encoder
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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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* - isvce_get_downscaler_data_size()
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* - isvce_get_downscaler_padding_dims()
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* - isvce_isvce_process_ctxt_t_downscaler()
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* - isvce_get_downscaler_normalized_filtered_pixel()
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* - isvce_horizontal_downscale_and_transpose()
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* - isvce_process_downscaler()
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* - isvce_initialize_downscaler()
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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 _ISVCE_DOWNSCALER_H_
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#define _ISVCE_DOWNSCALER_H_
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#include "ih264_typedefs.h"
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#include "iv2.h"
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#include "isvc_defs.h"
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#include "isvc_structs.h"
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#include "isvce_defs.h"
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typedef struct
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{
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/**
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* pointer to the state of downscaler
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*/
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void *pv_scaler_state;
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/**
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* scaling factor between the dimensions of two consecutive SVC layers
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*/
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DOUBLE d_scaling_factor;
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/**
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* Num spatial layers
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*/
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UWORD8 u1_num_spatial_layers;
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} downscaler_ctxt_t;
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typedef struct
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{
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UWORD8 u1_left_pad_size;
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UWORD8 u1_right_pad_size;
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UWORD8 u1_top_pad_size;
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UWORD8 u1_bottom_pad_size;
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} padding_dims_t;
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/**
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*******************************************************************************
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*
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* @brief
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* initializes the downscaler context
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*
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* @par Description:
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* initializes the downscaler context for the given scaling factor
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* with padding size, filter size, etc.
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*
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* @param[in] ps_scaler
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* pointer downscaler context
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*
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* @param[in] ps_mem_rec
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* pointer to memory allocated to downscaler process
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*
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* @param[in] d_scaling_factor
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* scaling reatio of width/ height between two consecutive SVC layers
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*
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* @param[in] u1_num_spatial_layers
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* scaling reatio of width/ height between two consecutive SVC layers
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*
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* @param[in] u4_wd
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* width of the input
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*
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* @param[in] u4_ht
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* height of the input
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*
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* @param[in] e_arch
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* architecure type
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*
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* @returns
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*
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* @remarks
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* when ARM intrinsics are added, update should be done here
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*
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*******************************************************************************
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*/
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extern void isvce_initialize_downscaler(downscaler_ctxt_t *ps_scaler, iv_mem_rec_t *ps_mem_rec,
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DOUBLE d_scaling_factor, UWORD8 u1_num_spatial_layers,
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UWORD32 u4_in_width, UWORD32 u4_in_height,
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IV_ARCH_T e_arch);
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/**
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*******************************************************************************
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*
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* @brief
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* gets the memory size required for downscaler
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*
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* @par Description:
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* returns the memory required by the downscaler context and state structs
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* for allocation.
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*
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* @returns
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*
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* @remarks
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*
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*
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*******************************************************************************
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*/
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extern UWORD32 isvce_get_downscaler_data_size(UWORD8 u1_num_spatial_layers, DOUBLE d_scaling_factor,
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UWORD32 u4_width, UWORD32 u4_height);
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/**
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*******************************************************************************
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*
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* @brief
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* processes downscaler
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*
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* @par Description:
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* calls the function for padding and scaling
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*
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* @param[in] ps_scaler
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* pointer to downdownscaler context
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*
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* @param[in] ps_src_buf_props
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* pointer to source buffer props struct
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*
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* @param[in] u4_blk_wd
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* width of the block to be processed
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*
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* @param[in] u4_blk_ht
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* height of the block to be processed
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*
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* @returns
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*
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* @remarks
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*
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*
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*******************************************************************************
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*/
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extern void isvce_process_downscaler(downscaler_ctxt_t *ps_scaler,
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yuv_buf_props_t *ps_src_buf_props,
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yuv_buf_props_t *ps_dst_buf_props, UWORD32 u4_blk_wd,
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UWORD32 u4_blk_ht);
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/**
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*******************************************************************************
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*
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* @brief
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* gets the padding size required for filtering
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*
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* @par Description:
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* gets the padding size required for filtering
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*
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* @returns
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*
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* @remarks
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*
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*
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*******************************************************************************
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*/
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extern void isvce_get_downscaler_padding_dims(padding_dims_t *ps_pad_dims);
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#endif
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