diff options
Diffstat (limited to 'src/ipa/ipu3/algorithms/awb.cpp')
| -rw-r--r-- | src/ipa/ipu3/algorithms/awb.cpp | 166 |
1 files changed, 83 insertions, 83 deletions
diff --git a/src/ipa/ipu3/algorithms/awb.cpp b/src/ipa/ipu3/algorithms/awb.cpp index dd7ebc07..5abd4621 100644 --- a/src/ipa/ipu3/algorithms/awb.cpp +++ b/src/ipa/ipu3/algorithms/awb.cpp @@ -218,6 +218,89 @@ int Awb::configure(IPAContext &context, return 0; } +constexpr uint16_t Awb::threshold(float value) +{ + /* AWB thresholds are in the range [0, 8191] */ + return value * 8191; +} + +constexpr uint16_t Awb::gainValue(double gain) +{ + /* + * The colour gains applied by the BNR for the four channels (Gr, R, B + * and Gb) are expressed in the parameters structure as 16-bit integers + * that store a fixed-point U3.13 value in the range [0, 8[. + * + * The real gain value is equal to the gain parameter plus one, i.e. + * + * Pout = Pin * (1 + gain / 8192) + * + * where 'Pin' is the input pixel value, 'Pout' the output pixel value, + * and 'gain' the gain in the parameters structure as a 16-bit integer. + */ + return std::clamp((gain - 1.0) * 8192, 0.0, 65535.0); +} + +/** + * \copydoc libcamera::ipa::Algorithm::prepare + */ +void Awb::prepare(IPAContext &context, + [[maybe_unused]] const uint32_t frame, + [[maybe_unused]] IPAFrameContext &frameContext, + ipu3_uapi_params *params) +{ + /* + * Green saturation thresholds are reduced because we are using the + * green channel only in the exposure computation. + */ + params->acc_param.awb.config.rgbs_thr_r = threshold(1.0); + params->acc_param.awb.config.rgbs_thr_gr = threshold(0.9); + params->acc_param.awb.config.rgbs_thr_gb = threshold(0.9); + params->acc_param.awb.config.rgbs_thr_b = threshold(1.0); + + /* + * Enable saturation inclusion on thr_b for ImgU to update the + * ipu3_uapi_awb_set_item->sat_ratio field. + */ + params->acc_param.awb.config.rgbs_thr_b |= IPU3_UAPI_AWB_RGBS_THR_B_INCL_SAT | + IPU3_UAPI_AWB_RGBS_THR_B_EN; + + const ipu3_uapi_grid_config &grid = context.configuration.grid.bdsGrid; + + params->acc_param.awb.config.grid = context.configuration.grid.bdsGrid; + + /* + * Optical center is column start (respectively row start) of the + * cell of interest minus its X center (respectively Y center). + * + * For the moment use BDS as a first approximation, but it should + * be calculated based on Shading (SHD) parameters. + */ + params->acc_param.bnr = imguCssBnrDefaults; + Size &bdsOutputSize = context.configuration.grid.bdsOutputSize; + params->acc_param.bnr.column_size = bdsOutputSize.width; + params->acc_param.bnr.opt_center.x_reset = grid.x_start - (bdsOutputSize.width / 2); + params->acc_param.bnr.opt_center.y_reset = grid.y_start - (bdsOutputSize.height / 2); + params->acc_param.bnr.opt_center_sqr.x_sqr_reset = params->acc_param.bnr.opt_center.x_reset + * params->acc_param.bnr.opt_center.x_reset; + params->acc_param.bnr.opt_center_sqr.y_sqr_reset = params->acc_param.bnr.opt_center.y_reset + * params->acc_param.bnr.opt_center.y_reset; + + params->acc_param.bnr.wb_gains.gr = gainValue(context.activeState.awb.gains.green); + params->acc_param.bnr.wb_gains.r = gainValue(context.activeState.awb.gains.red); + params->acc_param.bnr.wb_gains.b = gainValue(context.activeState.awb.gains.blue); + params->acc_param.bnr.wb_gains.gb = gainValue(context.activeState.awb.gains.green); + + LOG(IPU3Awb, Debug) << "Color temperature estimated: " << asyncResults_.temperatureK; + + /* The CCM matrix may change when color temperature will be used */ + params->acc_param.ccm = imguCssCcmDefault; + + params->use.acc_awb = 1; + params->use.acc_bnr = 1; + params->use.acc_ccm = 1; +} + /** * The function estimates the correlated color temperature using * from RGB color space input. @@ -415,89 +498,6 @@ void Awb::process(IPAContext &context, [[maybe_unused]] const uint32_t frame, context.activeState.awb.temperatureK); } -constexpr uint16_t Awb::threshold(float value) -{ - /* AWB thresholds are in the range [0, 8191] */ - return value * 8191; -} - -constexpr uint16_t Awb::gainValue(double gain) -{ - /* - * The colour gains applied by the BNR for the four channels (Gr, R, B - * and Gb) are expressed in the parameters structure as 16-bit integers - * that store a fixed-point U3.13 value in the range [0, 8[. - * - * The real gain value is equal to the gain parameter plus one, i.e. - * - * Pout = Pin * (1 + gain / 8192) - * - * where 'Pin' is the input pixel value, 'Pout' the output pixel value, - * and 'gain' the gain in the parameters structure as a 16-bit integer. - */ - return std::clamp((gain - 1.0) * 8192, 0.0, 65535.0); -} - -/** - * \copydoc libcamera::ipa::Algorithm::prepare - */ -void Awb::prepare(IPAContext &context, - [[maybe_unused]] const uint32_t frame, - [[maybe_unused]] IPAFrameContext &frameContext, - ipu3_uapi_params *params) -{ - /* - * Green saturation thresholds are reduced because we are using the - * green channel only in the exposure computation. - */ - params->acc_param.awb.config.rgbs_thr_r = threshold(1.0); - params->acc_param.awb.config.rgbs_thr_gr = threshold(0.9); - params->acc_param.awb.config.rgbs_thr_gb = threshold(0.9); - params->acc_param.awb.config.rgbs_thr_b = threshold(1.0); - - /* - * Enable saturation inclusion on thr_b for ImgU to update the - * ipu3_uapi_awb_set_item->sat_ratio field. - */ - params->acc_param.awb.config.rgbs_thr_b |= IPU3_UAPI_AWB_RGBS_THR_B_INCL_SAT | - IPU3_UAPI_AWB_RGBS_THR_B_EN; - - const ipu3_uapi_grid_config &grid = context.configuration.grid.bdsGrid; - - params->acc_param.awb.config.grid = context.configuration.grid.bdsGrid; - - /* - * Optical center is column start (respectively row start) of the - * cell of interest minus its X center (respectively Y center). - * - * For the moment use BDS as a first approximation, but it should - * be calculated based on Shading (SHD) parameters. - */ - params->acc_param.bnr = imguCssBnrDefaults; - Size &bdsOutputSize = context.configuration.grid.bdsOutputSize; - params->acc_param.bnr.column_size = bdsOutputSize.width; - params->acc_param.bnr.opt_center.x_reset = grid.x_start - (bdsOutputSize.width / 2); - params->acc_param.bnr.opt_center.y_reset = grid.y_start - (bdsOutputSize.height / 2); - params->acc_param.bnr.opt_center_sqr.x_sqr_reset = params->acc_param.bnr.opt_center.x_reset - * params->acc_param.bnr.opt_center.x_reset; - params->acc_param.bnr.opt_center_sqr.y_sqr_reset = params->acc_param.bnr.opt_center.y_reset - * params->acc_param.bnr.opt_center.y_reset; - - params->acc_param.bnr.wb_gains.gr = gainValue(context.activeState.awb.gains.green); - params->acc_param.bnr.wb_gains.r = gainValue(context.activeState.awb.gains.red); - params->acc_param.bnr.wb_gains.b = gainValue(context.activeState.awb.gains.blue); - params->acc_param.bnr.wb_gains.gb = gainValue(context.activeState.awb.gains.green); - - LOG(IPU3Awb, Debug) << "Color temperature estimated: " << asyncResults_.temperatureK; - - /* The CCM matrix may change when color temperature will be used */ - params->acc_param.ccm = imguCssCcmDefault; - - params->use.acc_awb = 1; - params->use.acc_bnr = 1; - params->use.acc_ccm = 1; -} - REGISTER_IPA_ALGORITHM(Awb, "Awb") } /* namespace ipa::ipu3::algorithms */ |