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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.c
*
* @brief
* Functions used to modify frame rate
*
* @author
* ittiam
*
* @par List of Functions:
* - ih264e_pd_frm_rate_get_init_free_memtab()
* - ih264e_init_pd_frm_rate()
* - ih264e_update_pd_frm_rate()
* - ih264e_get_pd_avg_frm_rate()
*
* @remarks
* None
*
*******************************************************************************
*/
/*****************************************************************************/
/* File Includes */
/*****************************************************************************/
/* User include files */
#include "irc_datatypes.h"
#include "iv2.h"
#include "ive2.h"
#include "ih264_defs.h"
#include "ih264_structs.h"
#include "ih264_trans_quant_itrans_iquant.h"
#include "ih264_inter_pred_filters.h"
#include "ih264_mem_fns.h"
#include "ih264_padding.h"
#include "ih264_intra_pred_filters.h"
#include "ih264_deblk_edge_filters.h"
#include "ih264e_error.h"
#include "ih264e_bitstream.h"
#include "ih264e_defs.h"
#include "ime_distortion_metrics.h"
#include "ime_structs.h"
#include "irc_cntrl_param.h"
#include "irc_frame_info_collector.h"
#include "ih264e_rate_control.h"
#include "ih264e_structs.h"
#include "ih264e_rc_mem_interface.h"
#include "ih264e_time_stamp.h"
#include "ih264e_modify_frm_rate.h"
/*****************************************************************************/
/* Function Definitions */
/*****************************************************************************/
/**
*******************************************************************************
*
* @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)
{
WORD32 i4_mem_tab_idx = 0;
static pd_frm_rate_t s_temp_pd_frm_rate_t;
/* Hack for al alloc, during which we dont have any state memory.
Dereferencing can cause issues */
if (e_func_type == GET_NUM_MEMTAB || e_func_type == FILL_MEMTAB)
(*pps_pd_frm_rate) = &s_temp_pd_frm_rate_t;
/* for src rate control state structure */
if (e_func_type != GET_NUM_MEMTAB)
{
fill_memtab(&ps_memtab[i4_mem_tab_idx], sizeof(pd_frm_rate_t),
ALIGN_128_BYTE, PERSISTENT, DDR);
use_or_fill_base(&ps_memtab[0], (void**) pps_pd_frm_rate, e_func_type);
}
i4_mem_tab_idx++;
return (i4_mem_tab_idx);
}
/**
*******************************************************************************
*
* @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_t *ps_pd_frm_rate,
UWORD32 u4_input_frm_rate)
{
WORD32 i;
ps_pd_frm_rate->u4_input_frm_rate = u4_input_frm_rate;
for (i = 0; i < (WORD32) (u4_input_frm_rate / 1000); i++)
{
ps_pd_frm_rate->u4_cur_frm_rate[i] = u4_input_frm_rate;
}
ps_pd_frm_rate->u4_frm_num = 0;
ps_pd_frm_rate->u4_tot_frm_encoded = 0;
}
/**
*******************************************************************************
*
* @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_t *ps_pd_frm_rate,
UWORD32 u4_cur_frm_rate)
{
ps_pd_frm_rate->u4_cur_frm_rate[ps_pd_frm_rate->u4_frm_num] = u4_cur_frm_rate;
ps_pd_frm_rate->u4_frm_num++;
/* Increment the frame number */
if (ps_pd_frm_rate->u4_tot_frm_encoded < (ps_pd_frm_rate->u4_input_frm_rate / 1000))
{
ps_pd_frm_rate->u4_tot_frm_encoded++;
}
/* Reset frm_num to zero */
if (ps_pd_frm_rate->u4_frm_num >= (ps_pd_frm_rate->u4_input_frm_rate / 1000))
{
ps_pd_frm_rate->u4_frm_num = 0;
}
}
/**
*******************************************************************************
*
* @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_t *ps_pd_frm_rate)
{
WORD32 i;
WORD32 i4_avg_frm_rate = 0;
for (i = 0; i < (WORD32) ps_pd_frm_rate->u4_tot_frm_encoded; i++)
{
i4_avg_frm_rate += ps_pd_frm_rate->u4_cur_frm_rate[i];
}
i4_avg_frm_rate = i4_avg_frm_rate / ps_pd_frm_rate->u4_tot_frm_encoded;
return i4_avg_frm_rate;
}
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