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183 lines
5.4 KiB
183 lines
5.4 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_modify_frm_rate.h
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*
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* @brief
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* Functions declarations used to modify frame rate
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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_MODIFY_FRM_RATE_H_
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#define IH264E_MODIFY_FRM_RATE_H_
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/*****************************************************************************/
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/* Constant Definitions */
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/*****************************************************************************/
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#define MAX_NUM_FRAME 120
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/*****************************************************************************/
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/* Structures */
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/*****************************************************************************/
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typedef struct pd_frm_rate_t
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{
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/*
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* The input frame rate set in the encoder (per 1000 sec)
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*/
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UWORD32 u4_input_frm_rate;
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/*
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* Frame rate of current frame due to pull down
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*/
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UWORD32 u4_cur_frm_rate[MAX_NUM_FRAME];
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/*
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* current frame num in the above buffer
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*/
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UWORD32 u4_frm_num;
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/*
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* Total number of frames encoded.
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* if greater than input frame rate stays at input frame rate
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*/
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UWORD32 u4_tot_frm_encoded;
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}pd_frm_rate_t;
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typedef struct pd_frm_rate_t *pd_frm_rate_handle;
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/*****************************************************************************/
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/* Function Declarations */
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/*****************************************************************************/
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/**
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*******************************************************************************
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*
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* @brief Function to init pd frame rate memtab
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*
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* @par Description
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* Function to init pull down frame rate memtab
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*
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* @param[in] pps_pd_frm_rate
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* pull down frame rate context
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*
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* @param[in] ps_memtab
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* Handle to memtab
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*
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* @param[in] e_func_type
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* Function type (get memtab/ update memtab)
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*
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* @returns Number of memtabs used
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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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WORD32 ih264e_pd_frm_rate_get_init_free_memtab(pd_frm_rate_handle *pps_pd_frm_rate,
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itt_memtab_t *ps_memtab,
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ITT_FUNC_TYPE_E e_func_type);
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/**
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*******************************************************************************
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*
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* @brief Initializes the pull down frame rate state structure based on input
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* frame rate
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*
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* @par Description
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* Initializes the pull down frame rate state structure based on input frame rate
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*
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* @param[in] ps_pd_frm_rate
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* Pull down frame rate context
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*
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* @param[in] u4_input_frm_rate
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* Input frame rate in frame per 1000sec
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*
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* @returns none
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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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void ih264e_init_pd_frm_rate(pd_frm_rate_handle ps_pd_frm_rate,
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UWORD32 u4_input_frm_rate);
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/**
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*******************************************************************************
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*
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* @brief Function to update pull down frame rate
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*
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* @par Description
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* For each frame a run time frame rate value is sent based on whether a frame
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* is skipped or not. If it is skipped for pull down then the current frame
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* rate for the pull down period is signaled as 4/5th of the original frame
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* rate. Thus when this is averaged the frame rate gradually switches from the
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* input frame rate to 4/5th of input frame rate as and when more 3:2 pull
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* down patterns are detected
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*
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* @param[in] ps_pd_frm_rate
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* Pull down frame rate context
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*
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* @param[in] u4_input_frm_rate
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* Input frame rate in frame per 1000sec
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*
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* @returns none
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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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void ih264e_update_pd_frm_rate(pd_frm_rate_handle ps_pd_frm_rate,
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UWORD32 u4_cur_frm_rate);
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/**
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*******************************************************************************
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*
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* @brief returns average frame rate in 1 sec duration
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*
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* @par Description
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* Averages the last N frame in period(1 sec) and then gives that
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* as the current frames frame rate. Thus this averages out the sudden
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* variation in frame rate
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*
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* @param[in] ps_pd_frm_rate
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* Handle to pull down frame rate context
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*
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* @returns average frame rate
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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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UWORD32 ih264e_get_pd_avg_frm_rate(pd_frm_rate_handle ps_pd_frm_rate);
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#endif /* IH264E_MODIFY_FRM_RATE_H_ */
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