Function ConstructQuantizedPoolFromRawPool

catboost/libs/data/quantization.cpp:2699–2731

    TQuantizedObjectsDataProviderPtr ConstructQuantizedPoolFromRawPool(
        TDataProviderPtr srcData,
        NJson::TJsonValue plainJsonParams,
        TQuantizedFeaturesInfoPtr quantizedFeaturesInfo
    ) {

        NJson::TJsonValue jsonParams;
        NJson::TJsonValue outputJsonParams;
        ConvertIgnoredFeaturesFromStringToIndices(srcData.Get()->MetaInfo, &plainJsonParams);
        NCatboostOptions::PlainJsonToOptions(plainJsonParams, &jsonParams, &outputJsonParams);
        NCatboostOptions::TCatBoostOptions catBoostOptions(NCatboostOptions::LoadOptions(jsonParams));
        NCatboostOptions::TOutputFilesOptions outputFileOptions;
        outputFileOptions.Load(outputJsonParams);

        const ui32 allDataObjectCount = srcData->ObjectsData->GetObjectCount();

        CB_ENSURE(allDataObjectCount != 0, "Pool is empty");

        TRestorableFastRng64 rand(catBoostOptions.RandomSeed.Get());

        NPar::TLocalExecutor localExecutor;
        localExecutor.RunAdditionalThreads(catBoostOptions.SystemOptions->NumThreads.Get() - 1);

        TLabelConverter labelConverter;

        return GetQuantizedObjectsData(
            catBoostOptions,
            srcData,
            Nothing(),
            quantizedFeaturesInfo,
            &localExecutor,
            &rand);
    }


}