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244 lines
7.1 KiB
244 lines
7.1 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.c
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*
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* @brief
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* Functions 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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* @par List of Functions:
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* - ih264e_pd_frm_rate_get_init_free_memtab()
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* - ih264e_init_pd_frm_rate()
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* - ih264e_update_pd_frm_rate()
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* - ih264e_get_pd_avg_frm_rate()
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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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/*****************************************************************************/
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/* File Includes */
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/*****************************************************************************/
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/* User include files */
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#include "irc_datatypes.h"
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#include "iv2.h"
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#include "ive2.h"
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#include "ih264_defs.h"
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#include "ih264_structs.h"
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#include "ih264_trans_quant_itrans_iquant.h"
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#include "ih264_inter_pred_filters.h"
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#include "ih264_mem_fns.h"
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#include "ih264_padding.h"
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#include "ih264_intra_pred_filters.h"
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#include "ih264_deblk_edge_filters.h"
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#include "ih264_cabac_tables.h"
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#include "ih264e_error.h"
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#include "ih264e_bitstream.h"
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#include "ih264e_defs.h"
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#include "ime_distortion_metrics.h"
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#include "ime_defs.h"
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#include "ime_structs.h"
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#include "irc_cntrl_param.h"
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#include "irc_frame_info_collector.h"
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#include "ih264e_rate_control.h"
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#include "ih264e_cabac_structs.h"
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#include "ih264e_structs.h"
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#include "ih264e_rc_mem_interface.h"
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#include "ih264e_time_stamp.h"
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#include "ih264e_modify_frm_rate.h"
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/*****************************************************************************/
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/* Function Definitions */
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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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WORD32 i4_mem_tab_idx = 0;
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pd_frm_rate_t s_temp_pd_frm_rate_t;
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/* Hack for al alloc, during which we dont have any state memory.
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Dereferencing can cause issues */
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if (e_func_type == GET_NUM_MEMTAB || e_func_type == FILL_MEMTAB)
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(*pps_pd_frm_rate) = &s_temp_pd_frm_rate_t;
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/* for src rate control state structure */
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if (e_func_type != GET_NUM_MEMTAB)
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{
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fill_memtab(&ps_memtab[i4_mem_tab_idx], sizeof(pd_frm_rate_t),
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ALIGN_128_BYTE, PERSISTENT, DDR);
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use_or_fill_base(&ps_memtab[0], (void**) pps_pd_frm_rate, e_func_type);
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}
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i4_mem_tab_idx++;
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return (i4_mem_tab_idx);
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}
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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_t *ps_pd_frm_rate,
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UWORD32 u4_input_frm_rate)
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{
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WORD32 i;
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ps_pd_frm_rate->u4_input_frm_rate = u4_input_frm_rate;
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for (i = 0; i < (WORD32) (u4_input_frm_rate / 1000); i++)
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{
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ps_pd_frm_rate->u4_cur_frm_rate[i] = u4_input_frm_rate;
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}
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ps_pd_frm_rate->u4_frm_num = 0;
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ps_pd_frm_rate->u4_tot_frm_encoded = 0;
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}
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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_t *ps_pd_frm_rate,
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UWORD32 u4_cur_frm_rate)
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{
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ps_pd_frm_rate->u4_cur_frm_rate[ps_pd_frm_rate->u4_frm_num] = u4_cur_frm_rate;
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ps_pd_frm_rate->u4_frm_num++;
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/* Increment the frame number */
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if (ps_pd_frm_rate->u4_tot_frm_encoded < (ps_pd_frm_rate->u4_input_frm_rate / 1000))
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{
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ps_pd_frm_rate->u4_tot_frm_encoded++;
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}
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/* Reset frm_num to zero */
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if (ps_pd_frm_rate->u4_frm_num >= (ps_pd_frm_rate->u4_input_frm_rate / 1000))
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{
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ps_pd_frm_rate->u4_frm_num = 0;
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}
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}
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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_t *ps_pd_frm_rate)
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{
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WORD32 i;
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WORD32 i4_avg_frm_rate = 0;
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for (i = 0; i < (WORD32) ps_pd_frm_rate->u4_tot_frm_encoded; i++)
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{
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i4_avg_frm_rate += ps_pd_frm_rate->u4_cur_frm_rate[i];
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}
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i4_avg_frm_rate = i4_avg_frm_rate / ps_pd_frm_rate->u4_tot_frm_encoded;
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return i4_avg_frm_rate;
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}
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