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citra-qt: Add customizable speed limit target (#3353)

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citra-qt: Add customizable speed limit target

* Update SDL config for the new frame_limit option
* Made max lag time a function of target speed percent.
* Added a checkbox to enable/disable frame limiter
* UI: Prevent frame_limit from under/overflowing
* UI: Hide target speed percent when frame limiter is off
* Disable frame limit spin box when framelimit isn't enabled
This commit is contained in:
James Rowe 2018-01-25 22:24:40 -07:00 • committed by GitHub
parent 33b0b5163f
commit b002511df0
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GPG key ID: 4AEE18F83AFDEB23
12 changed files with 155 additions and 96 deletions
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19
src/core/perf_stats.cpp
View file

@ -75,24 +75,27 @@ double PerfStats::GetLastFrameTimeScale() {
}
void FrameLimiter::DoFrameLimiting(u64 current_system_time_us) {
// Max lag caused by slow frames. Can be adjusted to compensate for too many slow frames. Higher
// values increase the time needed to recover and limit framerate again after spikes.
constexpr microseconds MAX_LAG_TIME_US = 25ms;
if (!Settings::values.toggle_framelimit) {
if (!Settings::values.use_frame_limit) {
return;
}
auto now = Clock::now();
double sleep_scale = Settings::values.frame_limit / 100.0;
frame_limiting_delta_err += microseconds(current_system_time_us - previous_system_time_us);
// Max lag caused by slow frames. Shouldn't be more than the length of a frame at the current
// speed percent or it will clamp too much and prevent this from properly limiting to that
// percent. High values means it'll take longer after a slow frame to recover and start limiting
const microseconds max_lag_time_us = duration_cast<microseconds>(
std::chrono::duration<double, std::chrono::microseconds::period>(25ms / sleep_scale));
frame_limiting_delta_err += duration_cast<microseconds>(
std::chrono::duration<double, std::chrono::microseconds::period>(
(current_system_time_us - previous_system_time_us) / sleep_scale));
frame_limiting_delta_err -= duration_cast<microseconds>(now - previous_walltime);
frame_limiting_delta_err =
MathUtil::Clamp(frame_limiting_delta_err, -MAX_LAG_TIME_US, MAX_LAG_TIME_US);
MathUtil::Clamp(frame_limiting_delta_err, -max_lag_time_us, max_lag_time_us);
if (frame_limiting_delta_err > microseconds::zero()) {
std::this_thread::sleep_for(frame_limiting_delta_err);
auto now_after_sleep = Clock::now();
frame_limiting_delta_err -= duration_cast<microseconds>(now_after_sleep - now);
now = now_after_sleep;

1
src/core/settings.cpp
View file

@ -22,7 +22,6 @@ void Apply() {
VideoCore::g_hw_renderer_enabled = values.use_hw_renderer;
VideoCore::g_shader_jit_enabled = values.use_shader_jit;
VideoCore::g_toggle_framelimit_enabled = values.toggle_framelimit;
if (VideoCore::g_emu_window) {
auto layout = VideoCore::g_emu_window->GetFramebufferLayout();

3
src/core/settings.h
View file

@ -97,7 +97,8 @@ struct Values {
bool use_shader_jit;
float resolution_factor;
bool use_vsync;
bool toggle_framelimit;
bool use_frame_limit;
u16 frame_limit;
LayoutOption layout_option;
bool swap_screen;

5
src/core/telemetry_session.cpp
View file

@ -167,8 +167,9 @@ TelemetrySession::TelemetrySession() {
AddField(Telemetry::FieldType::UserConfig, "Core_UseCpuJit", Settings::values.use_cpu_jit);
AddField(Telemetry::FieldType::UserConfig, "Renderer_ResolutionFactor",
Settings::values.resolution_factor);
AddField(Telemetry::FieldType::UserConfig, "Renderer_ToggleFramelimit",
Settings::values.toggle_framelimit);
AddField(Telemetry::FieldType::UserConfig, "Renderer_UseFrameLimit",
Settings::values.use_frame_limit);
AddField(Telemetry::FieldType::UserConfig, "Renderer_FrameLimit", Settings::values.frame_limit);
AddField(Telemetry::FieldType::UserConfig, "Renderer_UseHwRenderer",
Settings::values.use_hw_renderer);
AddField(Telemetry::FieldType::UserConfig, "Renderer_UseShaderJit",