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// Copyright 2015 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <algorithm>
#include <cstddef>
#include <vector>
#include "common/assert.h"
#include "common/profiler_reporting.h"
#include "common/synchronized_wrapper.h"
namespace Common {
namespace Profiling {
ProfilingManager::ProfilingManager()
: last_frame_end(Clock::now()), this_frame_start(Clock::now()) {}
void ProfilingManager::BeginFrame() {
this_frame_start = Clock::now();
}
void ProfilingManager::FinishFrame() {
Clock::time_point now = Clock::now();
results.interframe_time = now - last_frame_end;
results.frame_time = now - this_frame_start;
last_frame_end = now;
}
TimingResultsAggregator::TimingResultsAggregator(size_t window_size)
: max_window_size(window_size), window_size(0) {
interframe_times.resize(window_size, Duration::zero());
frame_times.resize(window_size, Duration::zero());
}
void TimingResultsAggregator::Clear() {
window_size = cursor = 0;
}
void TimingResultsAggregator::AddFrame(const ProfilingFrameResult& frame_result) {
interframe_times[cursor] = frame_result.interframe_time;
frame_times[cursor] = frame_result.frame_time;
++cursor;
if (cursor == max_window_size)
cursor = 0;
if (window_size < max_window_size)
++window_size;
}
static AggregatedDuration AggregateField(const std::vector<Duration>& v, size_t len) {
AggregatedDuration result;
result.avg = Duration::zero();
result.min = result.max = (len == 0 ? Duration::zero() : v[0]);
for (size_t i = 0; i < len; ++i) {
Duration value = v[i];
result.avg += value;
result.min = std::min(result.min, value);
result.max = std::max(result.max, value);
}
if (len != 0)
result.avg /= len;
return result;
}
static float tof(Common::Profiling::Duration dur) {
using FloatMs = std::chrono::duration<float, std::chrono::milliseconds::period>;
return std::chrono::duration_cast<FloatMs>(dur).count();
}
AggregatedFrameResult TimingResultsAggregator::GetAggregatedResults() const {
AggregatedFrameResult result;
result.interframe_time = AggregateField(interframe_times, window_size);
result.frame_time = AggregateField(frame_times, window_size);
if (result.interframe_time.avg != Duration::zero()) {
result.fps = 1000.0f / tof(result.interframe_time.avg);
} else {
result.fps = 0.0f;
}
return result;
}
ProfilingManager& GetProfilingManager() {
// Takes advantage of "magic" static initialization for race-free initialization.
static ProfilingManager manager;
return manager;
}
SynchronizedRef<TimingResultsAggregator> GetTimingResultsAggregator() {
static SynchronizedWrapper<TimingResultsAggregator> aggregator(30);
return SynchronizedRef<TimingResultsAggregator>(aggregator);
}
} // namespace Profiling
} // namespace Common
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