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Remove DSPLoadCalculator class in portaudio backend source

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This commit is contained in:
Tim Mayberry 2015-09-10 11:48:52 +10:00
parent c2e5bdedff
commit 28803fface
1 changed files with 0 additions and 88 deletions
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88
libs/backends/portaudio/dsp_load_calculator.h
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@ -1,88 +0,0 @@
/*
* Copyright (C) 2015 Tim Mayberry <mojofunk@gmail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef DSP_LOAD_CALCULATOR_H
#define DSP_LOAD_CALCULATOR_H
#include <stdint.h>
class DSPLoadCalculator {
public:
DSPLoadCalculator()
: m_max_time_us(0)
, m_start_timestamp_us(0)
, m_stop_timestamp_us(0)
, m_dsp_load(0.0f)
{
}
void set_max_time_us(uint64_t max_time_us) { m_max_time_us = max_time_us; }
uint64_t get_max_time_us() { return m_max_time_us; }
void set_start_timestamp_us(uint64_t start_timestamp_us)
{
m_start_timestamp_us = start_timestamp_us;
}
void set_stop_timestamp_us(uint64_t stop_timestamp_us)
{
m_stop_timestamp_us = stop_timestamp_us;
if (elapsed_time_us() > m_max_time_us) {
m_dsp_load = 1.0f;
} else {
const float load = elapsed_time_us() / (float)m_max_time_us;
if (load > m_dsp_load) {
m_dsp_load = load;
} else {
const float alpha = 0.2f * (m_max_time_us * 1e-6f);
m_dsp_load = m_dsp_load + alpha * (load - m_dsp_load) + 1e-12;
}
}
}
uint64_t elapsed_time_us()
{
return m_stop_timestamp_us - m_start_timestamp_us;
}
/**
* @return a decimal value between 0.0 and 1.0 representing the percentage
* of time spent between start and stop in proportion to the max expected time
* in microseconds(us).
*/
float get_dsp_load()
{
if (m_dsp_load > m_max_time_us) {
return 1.0f;
}
if (m_dsp_load < 0.0f) {
return 0.0f;
}
return m_dsp_load;
}
private:
uint64_t m_max_time_us;
uint64_t m_start_timestamp_us;
uint64_t m_stop_timestamp_us;
float m_dsp_load;
};
#endif // DSP_LOAD_CALCULATOR_H