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Fixed the GameSir-G7 Pro 8K accelerometer scale

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This commit is contained in:
Sam Lantinga
2026-02-26 09:07:15 -08:00
parent 862e1e8600
commit 7775bbef9f
1 changed files with 3 additions and 3 deletions
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6
src/joystick/hidapi/SDL_hidapi_gamesir.c
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@@ -390,9 +390,9 @@ static bool HIDAPI_DriverGameSir_OpenJoystick(SDL_HIDAPI_Device *device, SDL_Joy
// GameSir SDL protocol packets currently don't expose an IMU timestamp.
// Use a synthetic monotonic timestamp at the firmware's fixed IMU rate.
ctx->sensor_timestamp_ns = SDL_GetTicksNS();
// Accelerometer scale factor: assume a range of ±2g, 16-bit signed values (-32768 to 32767)
// 32768 corresponds to 2g, so the scale factor = 2 * SDL_STANDARD_GRAVITY / 32768.0f
ctx->accelScale = 2.0f * SDL_STANDARD_GRAVITY / 32768.0f;
// Accelerometer scale factor: assume a range of ±4g, 16-bit signed values (-32768 to 32767)
// 32768 corresponds to 4g, so the scale factor = 4 * SDL_STANDARD_GRAVITY / 32768.0f
ctx->accelScale = 4.0f * SDL_STANDARD_GRAVITY / 32768.0f;
// Gyro scale factor: based on the PS4 implementation
// PS4 uses (gyro_numerator / gyro_denominator) * (π / 180)