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Commit 7ca13719 authored by Emilian Peev's avatar Emilian Peev
Browse files

DngCreator: Populate baseline exposure tag 

"postRawSensitivityBoost" contains the gain value applied after
RAW. Take this value in to account and populate the baseline
exposure accordingly.

Bug: 33623101
Test: runtest -x
cts/tests/camera/src/android/hardware/camera2/cts/DngCreatorTest.java

Change-Id: Ib90a5c1791c422fd36ec44fb6ef695ba8a1dc475
parent 8d41ad08

core/jni/android_hardware_camera2_DngCreator.cpp

+18 −0
Original line number Diff line number Diff line
@@ -21,6 +21,7 @@ 
#include <algorithm>

#include <memory>

#include <vector>

#include <cmath>



#include <utils/Log.h>

#include <utils/Errors.h>
@@ -1374,6 +1375,23 @@ static sp<TiffWriter> DngCreator_setup(JNIEnv* env, jobject thiz, uint32_t image 
                TIFF_IFD_0), env, TAG_ISOSPEEDRATINGS, writer);

    }



    {

        // Baseline exposure

        camera_metadata_entry entry =

                results.find(ANDROID_CONTROL_POST_RAW_SENSITIVITY_BOOST);

        BAIL_IF_EMPTY_RET_NULL_SP(entry, env, TAG_BASELINEEXPOSURE, writer);



        // post RAW gain should be boostValue / 100

        double postRAWGain = static_cast<double> (entry.data.i32[0]) / 100.f;

        // Baseline exposure should be in EV units so log2(gain) =

        // log10(gain)/log10(2)

        double baselineExposure = std::log(postRAWGain) / std::log(2.0f);

        int32_t baseExposureSRat[] = { static_cast<int32_t> (baselineExposure * 100),

                100 };

        BAIL_IF_INVALID_RET_NULL_SP(writer->addEntry(TAG_BASELINEEXPOSURE, 1,

                baseExposureSRat, TIFF_IFD_0), env, TAG_BASELINEEXPOSURE, writer);

    }



    {

        // focal length

        camera_metadata_entry entry =