You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
249 lines
9.3 KiB
249 lines
9.3 KiB
/******************************************************************************
|
|
*
|
|
* Copyright (C) 2018 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 fixed_point_error_bits.c
|
|
*
|
|
* \brief
|
|
* This file contain error bits processing functions
|
|
*
|
|
* \date
|
|
* 15/02/2012
|
|
*
|
|
* \author
|
|
* ittiam
|
|
*
|
|
******************************************************************************
|
|
*/
|
|
/*****************************************************************************/
|
|
/* File Includes */
|
|
/*****************************************************************************/
|
|
|
|
/* System include files */
|
|
#include <stdio.h>
|
|
|
|
/* User include files */
|
|
#include "ittiam_datatypes.h"
|
|
#include "rc_common.h"
|
|
#include "rc_cntrl_param.h"
|
|
#include "var_q_operator.h"
|
|
#include "mem_req_and_acq.h"
|
|
#include "fixed_point_error_bits.h"
|
|
|
|
/*i4_max_tgt_frm_rate and i4_tgt_frm_rate hold same value so removing one*/
|
|
typedef struct error_bits_t
|
|
{
|
|
/* WORD32 i4_max_tgt_frm_rate; */ /*Max tgt frm rate so that dynamic change infrm rate can be handled */
|
|
WORD32 i4_accum_frm_rate; /* Cur frm rate */
|
|
WORD32 i4_tgt_frm_rate; /* tgt frame rate*/
|
|
WORD32 i4_tgt_frm_rate_incr; /* tgt frm rate increment */
|
|
UWORD8 u1_compute_error_bits; /* flag to indicate 1 second is up*/
|
|
WORD32 i4_accum_bitrate; /* Bitrate/frame rate value added over a period*/
|
|
WORD32 i4_bitrate; /* bitrate */
|
|
} error_bits_t;
|
|
|
|
#if NON_STEADSTATE_CODE
|
|
WORD32 error_bits_num_fill_use_free_memtab(
|
|
error_bits_t **pps_error_bits, itt_memtab_t *ps_memtab, ITT_FUNC_TYPE_E e_func_type)
|
|
{
|
|
WORD32 i4_mem_tab_idx = 0;
|
|
static error_bits_t s_error_bits_temp;
|
|
|
|
/* 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_error_bits) = &s_error_bits_temp;
|
|
|
|
/*for src rate control state structure*/
|
|
if(e_func_type != GET_NUM_MEMTAB)
|
|
{
|
|
fill_memtab(
|
|
&ps_memtab[i4_mem_tab_idx], sizeof(error_bits_t), MEM_TAB_ALIGNMENT, PERSISTENT, DDR);
|
|
use_or_fill_base(&ps_memtab[0], (void **)pps_error_bits, e_func_type);
|
|
}
|
|
i4_mem_tab_idx++;
|
|
|
|
return (i4_mem_tab_idx);
|
|
}
|
|
|
|
/* ******************************************************************************/
|
|
/**
|
|
* @brief Calculates the error bits due to fixed point divisions
|
|
*
|
|
* @param ps_error_bits
|
|
* @param i4_tgt_frm_rate
|
|
* @param i4_bitrate
|
|
*/
|
|
/* ******************************************************************************/
|
|
void init_error_bits(error_bits_t *ps_error_bits, WORD32 i4_tgt_frm_rate, WORD32 i4_bitrate)
|
|
{
|
|
/* This value is incremented every at the end of every VOP by i4_tgt_frm_rate_incr*/
|
|
/* Initializing the parameters*/
|
|
ps_error_bits->i4_accum_frm_rate = 0;
|
|
ps_error_bits->i4_tgt_frm_rate = i4_tgt_frm_rate;
|
|
|
|
/* Value by which i4_accum_frm_rate is incremented every VOP*/
|
|
ps_error_bits->i4_tgt_frm_rate_incr = 1000;
|
|
|
|
/*Compute error bits is set to 1 at the end of 1 second*/
|
|
ps_error_bits->u1_compute_error_bits = 0;
|
|
ps_error_bits->i4_tgt_frm_rate = i4_tgt_frm_rate;
|
|
ps_error_bits->i4_accum_bitrate = 0;
|
|
ps_error_bits->i4_bitrate = i4_bitrate;
|
|
}
|
|
|
|
#endif /* #if NON_STEADSTATE_CODE */
|
|
|
|
/* ******************************************************************************/
|
|
/**
|
|
* @brief Updates the error state
|
|
*
|
|
* @param ps_error_bits
|
|
*/
|
|
/* ******************************************************************************/
|
|
void update_error_bits(error_bits_t *ps_error_bits)
|
|
{
|
|
WORD32 i4_bits_per_frame;
|
|
|
|
X_PROD_Y_DIV_Z(
|
|
ps_error_bits->i4_bitrate, 1000, ps_error_bits->i4_tgt_frm_rate, i4_bits_per_frame);
|
|
|
|
if(ps_error_bits->u1_compute_error_bits == 1)
|
|
{
|
|
ps_error_bits->i4_accum_bitrate = 0;
|
|
//ps_error_bits->i4_accum_frm_rate -= ps_error_bits->i4_tgt_frm_rate;
|
|
ps_error_bits->i4_accum_frm_rate = 0;
|
|
}
|
|
/* This value is incremented every at the end of every VOP by
|
|
i4_tgt_frm_rate_incr*/
|
|
ps_error_bits->i4_accum_frm_rate += ps_error_bits->i4_tgt_frm_rate_incr;
|
|
ps_error_bits->i4_accum_bitrate += i4_bits_per_frame;
|
|
|
|
/* When current tgt frm rate is equal or greater than max tgt fram rate
|
|
1 second is up , compute the error bits */
|
|
if(ps_error_bits->i4_accum_frm_rate >= ps_error_bits->i4_tgt_frm_rate)
|
|
{
|
|
/* ps_error_bits->i4_accum_frm_rate -= ps_error_bits->i4_tgt_frm_rate; */
|
|
ps_error_bits->u1_compute_error_bits = 1;
|
|
}
|
|
else
|
|
{
|
|
ps_error_bits->u1_compute_error_bits = 0;
|
|
}
|
|
}
|
|
|
|
/* ******************************************************************************/
|
|
/**
|
|
* @brief Returns the error bits for the current frame if there are any
|
|
*
|
|
* @param ps_error_bits
|
|
*
|
|
* @return
|
|
*/
|
|
/* ******************************************************************************/
|
|
WORD32 get_error_bits(error_bits_t *ps_error_bits)
|
|
{
|
|
WORD32 i4_error_bits = 0;
|
|
/*If 1s is up calcualte error for the last 1s worth fo frames*/
|
|
if(ps_error_bits->u1_compute_error_bits == 1)
|
|
{
|
|
WORD32 i4_cur_bitrate;
|
|
WORD32 i4_cur_frame_rate = ps_error_bits->i4_accum_frm_rate;
|
|
/* For frame rates like 29.970, the current frame rate would be a multiple of
|
|
1000 and every 100 seconds 3 frames would be dropped. So the error should be
|
|
calculated based on actual frame rate. So for e.g. the iteration, there would be
|
|
30 frames and so the bits allocated would be (30/29.970)*bitrate */
|
|
X_PROD_Y_DIV_Z(
|
|
ps_error_bits->i4_bitrate,
|
|
i4_cur_frame_rate,
|
|
ps_error_bits->i4_tgt_frm_rate,
|
|
i4_cur_bitrate);
|
|
/*Error = Actual bitrate - bits_per_frame * num of frames*/
|
|
i4_error_bits = i4_cur_bitrate - ps_error_bits->i4_accum_bitrate;
|
|
}
|
|
return (i4_error_bits);
|
|
}
|
|
/* ******************************************************************************/
|
|
/**
|
|
* @brief Change the bitrate value for error bits module
|
|
*
|
|
* @param ps_error_bits
|
|
* @param i4_bitrate
|
|
*/
|
|
/* ******************************************************************************/
|
|
void change_bitrate_in_error_bits(error_bits_t *ps_error_bits, WORD32 i4_bitrate)
|
|
{
|
|
/*here accum_bitrate would have accumulated the value based on old bit rate. after one second is elapsed
|
|
* the error is calcluated based on new bit rate which would result in huge error value. to avoid this
|
|
* accum_bitrate value is recalculated assuming new bitrate.
|
|
*/
|
|
/*#ifdef DYNAMIC_RC*/
|
|
WORD32 i4_old_bits_per_frame;
|
|
WORD32 i4_new_bits_per_frame;
|
|
WORD32 i4_frame_count;
|
|
X_PROD_Y_DIV_Z(
|
|
ps_error_bits->i4_bitrate, 1000, ps_error_bits->i4_tgt_frm_rate, i4_old_bits_per_frame);
|
|
i4_frame_count = ps_error_bits->i4_accum_bitrate / i4_old_bits_per_frame;
|
|
X_PROD_Y_DIV_Z(i4_bitrate, 1000, ps_error_bits->i4_tgt_frm_rate, i4_new_bits_per_frame);
|
|
ps_error_bits->i4_accum_bitrate = i4_frame_count * i4_new_bits_per_frame;
|
|
|
|
/*#endif*/
|
|
/*change bit rate*/
|
|
ps_error_bits->i4_bitrate = i4_bitrate;
|
|
/* ps_error_bits->i4_accum_bitrate=i4_bitrate;*/
|
|
}
|
|
/* ******************************************************************************/
|
|
/**
|
|
* @brief Change the frame rate parameter for the error bits state
|
|
*
|
|
* @param ps_error_bits
|
|
* @param i4_tgt_frm_rate
|
|
*/
|
|
/* ******************************************************************************/
|
|
/*IMPLEMENTATION NOT TESTED*/
|
|
|
|
void change_frm_rate_in_error_bits(error_bits_t *ps_error_bits, WORD32 i4_tgt_frm_rate)
|
|
{
|
|
/* Value by which i4_accum_frm_rate is incremented every VOP*/
|
|
/*accum_frm_rate is used to mark one second mark so a change in frame rate could alter this mark leading
|
|
* to very high accum bitrate value. To avoid this accum_frame_rate is recalculated
|
|
* according to new value
|
|
*/
|
|
/* WORD32 i4_frame_count;*/
|
|
|
|
/* ps_error_bits->i4_accum_frm_rate=(ps_error_bits->i4_accum_frm_rate*i4_tgt_frm_rate)/ps_error_bits->i4_tgt_frm_rate);*/
|
|
|
|
if(ps_error_bits->i4_tgt_frm_rate != i4_tgt_frm_rate)
|
|
X_PROD_Y_DIV_Z(
|
|
ps_error_bits->i4_accum_frm_rate,
|
|
i4_tgt_frm_rate,
|
|
ps_error_bits->i4_tgt_frm_rate,
|
|
ps_error_bits->i4_accum_frm_rate);
|
|
|
|
/*round off the accum value to multiple of 1000*/
|
|
ps_error_bits->i4_accum_frm_rate = ps_error_bits->i4_accum_frm_rate / 1000;
|
|
ps_error_bits->i4_accum_frm_rate = ps_error_bits->i4_accum_frm_rate * 1000;
|
|
|
|
/* ps_error_bits->i4_tgt_frm_rate_incr = (ps_error_bits->i4_tgt_frm_rate
|
|
* 1000)/ i4_tgt_frm_rate;
|
|
*/
|
|
ps_error_bits->i4_tgt_frm_rate = i4_tgt_frm_rate;
|
|
}
|