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CommonHostInterface: Throttle rumble updates to changes or every 100ms

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These updates appear to be synchronous, and limit how fast we can fast
forward when controllers are connected via bluetooth.
This commit is contained in:
Connor McLaughlin 2021-01-19 00:27:33 +10:00
parent d4f52f1ec7
commit cbee8fab66
2 changed files with 26 additions and 2 deletions
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25
src/frontend-common/common_host_interface.cpp
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@ -1075,23 +1075,46 @@ void CommonHostInterface::AddControllerRumble(u32 controller_index, u32 num_moto
rumble.num_motors = std::min<u32>(num_motors, ControllerRumbleState::MAX_MOTORS);
rumble.last_strength.fill(0.0f);
rumble.update_callback = std::move(callback);
rumble.last_update_time = Common::Timer::GetValue();
m_controller_vibration_motors.push_back(std::move(rumble));
}
void CommonHostInterface::UpdateControllerRumble()
{
if (m_controller_vibration_motors.empty())
return;
// Rumble update frequency in milliseconds.
// We won't send an update to the controller unless this amount of time has passed, if the value has not changed.
// This is because the rumble update is synchronous, and with bluetooth latency can severely impact fast forward
// performance.
static constexpr float UPDATE_FREQUENCY = 1000.0f;
const u64 time = Common::Timer::GetValue();
for (ControllerRumbleState& rumble : m_controller_vibration_motors)
{
Controller* controller = System::GetController(rumble.controller_index);
if (!controller)
continue;
bool changed = false;
for (u32 i = 0; i < rumble.num_motors; i++)
rumble.last_strength[i] = controller->GetVibrationMotorStrength(i);
{
const float strength = controller->GetVibrationMotorStrength(i);
if (rumble.last_strength[i] != strength)
{
rumble.last_strength[i] = strength;
changed = true;
}
}
if (changed || Common::Timer::ConvertValueToMilliseconds(time - rumble.last_update_time) >= UPDATE_FREQUENCY)
{
rumble.last_update_time = time;
rumble.update_callback(rumble.last_strength.data(), rumble.num_motors);
}
}
}
void CommonHostInterface::StopControllerRumble()
{

1
src/frontend-common/common_host_interface.h
View file

@ -396,6 +396,7 @@ private:
u32 num_motors;
std::array<float, MAX_MOTORS> last_strength;
ControllerRumbleCallback update_callback;
u64 last_update_time;
};
std::vector<ControllerRumbleState> m_controller_vibration_motors;