diff options
Diffstat (limited to 'src/ipa/libipa')
| -rw-r--r-- | src/ipa/libipa/camera_sensor_helper.cpp | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/src/ipa/libipa/camera_sensor_helper.cpp b/src/ipa/libipa/camera_sensor_helper.cpp index 35056bec..3d8a2835 100644 --- a/src/ipa/libipa/camera_sensor_helper.cpp +++ b/src/ipa/libipa/camera_sensor_helper.cpp @@ -366,6 +366,35 @@ static constexpr double expGainDb(double step) return log2_10 * step / 20; } +class CameraSensorHelperAr0521 : public CameraSensorHelper +{ +public: + uint32_t gainCode(double gain) const override; + double gain(uint32_t gainCode) const override; + +private: + static constexpr double kStep_ = 16; +}; + +uint32_t CameraSensorHelperAr0521::gainCode(double gain) const +{ + gain = std::clamp(gain, 1.0, 15.5); + unsigned int coarse = std::log2(gain); + unsigned int fine = (gain / (1 << coarse) - 1) * kStep_; + + return (coarse << 4) | (fine & 0xf); +} + +double CameraSensorHelperAr0521::gain(uint32_t gainCode) const +{ + unsigned int coarse = gainCode >> 4; + unsigned int fine = gainCode & 0xf; + + return (1 << coarse) * (1 + fine / kStep_); +} + +REGISTER_CAMERA_SENSOR_HELPER("ar0521", CameraSensorHelperAr0521) + class CameraSensorHelperImx219 : public CameraSensorHelper { public: |