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