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// Copyright 2012 Dolphin Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#include "VideoCommon/FPSCounter.h"
#include <fstream>
#include <iomanip>
#include "Common/CommonTypes.h"
#include "Common/FileUtil.h"
#include "Common/Timer.h"
#include "Core/Core.h"
#include "VideoCommon/VideoConfig.h"
static constexpr u64 FPS_REFRESH_INTERVAL = 250000;
FPSCounter::FPSCounter()
{
m_last_time = Common::Timer::GetTimeUs();
m_on_state_changed_handle = Core::AddOnStateChangedCallback([this](Core::State state) {
if (state == Core::State::Paused)
SetPaused(true);
else if (state == Core::State::Running)
SetPaused(false);
});
}
FPSCounter::~FPSCounter()
{
Core::RemoveOnStateChangedCallback(&m_on_state_changed_handle);
}
void FPSCounter::LogRenderTimeToFile(u64 val)
{
if (!m_bench_file.is_open())
{
File::OpenFStream(m_bench_file, File::GetUserPath(D_LOGS_IDX) + "render_time.txt",
std::ios_base::out);
}
m_bench_file << std::fixed << std::setprecision(8) << (val / 1000.0) << std::endl;
}
void FPSCounter::Update()
{
const u64 time = Common::Timer::GetTimeUs();
const u64 diff = time - m_last_time;
m_time_diff_secs = static_cast<double>(diff / 1000000.0);
if (g_ActiveConfig.bLogRenderTimeToFile)
LogRenderTimeToFile(diff);
m_frame_counter++;
m_time_since_update += diff;
m_last_time = time;
if (m_time_since_update >= FPS_REFRESH_INTERVAL)
{
m_fps = m_frame_counter / (m_time_since_update / 1000000.0);
m_frame_counter = 0;
m_time_since_update = 0;
}
}
void FPSCounter::SetPaused(bool paused)
{
if (paused)
{
m_last_time_pause = Common::Timer::GetTimeUs();
}
else
{
const u64 time = Common::Timer::GetTimeUs();
const u64 diff = time - m_last_time_pause;
m_last_time += diff;
}
}
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