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PerfStats: Add method to get the instantaneous time ratio

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This commit is contained in:
Yuri Kunde Schlesner 2017-02-19 18:18:26 -08:00
parent c75ae6c585
commit 92c8bd4b1f
3 changed files with 22 additions and 7 deletions
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14
src/core/perf_stats.cpp
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@ -6,6 +6,9 @@
#include "core/hw/gpu.h"
#include "core/perf_stats.h"
using DoubleSecs = std::chrono::duration<double, std::chrono::seconds::period>;
using std::chrono::duration_cast;
namespace Core {
void PerfStats::BeginSystemFrame() {
@ -16,6 +19,9 @@ void PerfStats::EndSystemFrame() {
auto frame_end = Clock::now();
accumulated_frametime += frame_end - frame_begin;
system_frames += 1;
previous_frame_length = frame_end - previous_frame_end;
previous_frame_end = frame_end;
}
void PerfStats::EndGameFrame() {
@ -23,9 +29,6 @@ void PerfStats::EndGameFrame() {
}
PerfStats::Results PerfStats::GetAndResetStats(u64 current_system_time_us) {
using DoubleSecs = std::chrono::duration<double, std::chrono::seconds::period>;
using std::chrono::duration_cast;
auto now = Clock::now();
// Walltime elapsed since stats were reset
auto interval = duration_cast<DoubleSecs>(now - reset_point).count();
@ -50,4 +53,9 @@ PerfStats::Results PerfStats::GetAndResetStats(u64 current_system_time_us) {
return results;
}
double PerfStats::GetLastFrameTimeScale() {
constexpr double FRAME_LENGTH = 1.0 / GPU::SCREEN_REFRESH_RATE;
return duration_cast<DoubleSecs>(previous_frame_length).count() / FRAME_LENGTH;
}
} // namespace Core