154 lines
5.4 KiB
C
154 lines
5.4 KiB
C
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/******************************************************************************
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*
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* Copyright (C) 2018 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 vbr_str_prms.c
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*
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* \brief
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* This file contain
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*
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* \date
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*
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* \author
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* ittiam
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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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/* System include files */
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#include <stdio.h>
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/* User include files */
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#include "ittiam_datatypes.h"
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#include "rc_cntrl_param.h"
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#include "var_q_operator.h"
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#include "rc_common.h"
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#include "vbr_str_prms.h"
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/******************************************************************************
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Function Name : init_vbv_str_prms
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Description : Initializes and calcuates the number of I frame and P frames
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in the delay period
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Arguments :
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Return Values : void
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Revision History:
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Creation
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*****************************************************************************/
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#if NON_STEADSTATE_CODE
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void init_vbv_str_prms(
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vbr_str_prms_t *p_vbr_str_prms,
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UWORD32 u4_intra_frm_interval,
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UWORD32 u4_src_ticks,
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UWORD32 u4_tgt_ticks,
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UWORD32 u4_frms_in_delay_period)
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{
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p_vbr_str_prms->u4_frms_in_delay_prd = u4_frms_in_delay_period;
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p_vbr_str_prms->u4_src_ticks = u4_src_ticks;
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p_vbr_str_prms->u4_tgt_ticks = u4_tgt_ticks;
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p_vbr_str_prms->u4_intra_frame_int = u4_intra_frm_interval;
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}
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#endif /* #if NON_STEADSTATE_CODE */
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/*********************************************************************************
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Function Name : change_vbr_str_prms
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Description : Takes in changes of Intra frame interval, source and target ticks
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and recalculates the position of the next I frame
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Arguments :
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Return Values : void
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Revision History:
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Creation
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***********************************************************************************/
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#if NON_STEADSTATE_CODE
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void change_vsp_ifi(vbr_str_prms_t *p_vbr_str_prms, UWORD32 u4_intra_frame_int)
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{
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init_vbv_str_prms(
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p_vbr_str_prms,
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u4_intra_frame_int,
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p_vbr_str_prms->u4_src_ticks,
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p_vbr_str_prms->u4_tgt_ticks,
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p_vbr_str_prms->u4_frms_in_delay_prd);
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}
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/******************************************************************************
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Function Name : change_vsp_tgt_ticks
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Description :
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Arguments : p_vbr_str_prms
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Return Values : void
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Revision History:
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Creation
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*****************************************************************************/
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void change_vsp_tgt_ticks(vbr_str_prms_t *p_vbr_str_prms, UWORD32 u4_tgt_ticks)
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{
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UWORD32 u4_rem_intra_per_scaled;
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UWORD32 u4_prev_tgt_ticks = p_vbr_str_prms->u4_tgt_ticks;
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/*
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If the target frame rate is changed, recalculate the position of the next I frame based
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on the new target frame rate
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LIMITATIONS :
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Currently no support is available for dynamic change in source frame rate
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*/
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u4_rem_intra_per_scaled =
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((p_vbr_str_prms->u4_intra_prd_pos_in_tgt_ticks - p_vbr_str_prms->u4_cur_pos_in_src_ticks) /
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u4_prev_tgt_ticks) *
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u4_tgt_ticks;
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p_vbr_str_prms->u4_intra_prd_pos_in_tgt_ticks =
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u4_rem_intra_per_scaled + p_vbr_str_prms->u4_cur_pos_in_src_ticks;
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}
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/******************************************************************************
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Function Name : change_vsp_src_ticks
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Description :
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Arguments : p_vbr_str_prms
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Return Values : void
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Revision History:
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Creation
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*****************************************************************************/
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void change_vsp_src_ticks(vbr_str_prms_t *p_vbr_str_prms, UWORD32 u4_src_ticks)
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{
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init_vbv_str_prms(
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p_vbr_str_prms,
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p_vbr_str_prms->u4_intra_frame_int,
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u4_src_ticks,
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p_vbr_str_prms->u4_tgt_ticks,
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p_vbr_str_prms->u4_frms_in_delay_prd);
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}
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/******************************************************************************
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Function Name : change_vsp_fidp
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Description :
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Arguments : p_vbr_str_prms
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Return Values : void
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Revision History:
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Creation
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*****************************************************************************/
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void change_vsp_fidp(vbr_str_prms_t *p_vbr_str_prms, UWORD32 u4_frms_in_delay_period)
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{
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init_vbv_str_prms(
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p_vbr_str_prms,
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p_vbr_str_prms->u4_intra_frame_int,
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p_vbr_str_prms->u4_src_ticks,
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p_vbr_str_prms->u4_tgt_ticks,
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u4_frms_in_delay_period);
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}
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#endif /* #if NON_STEADSTATE_CODE */
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