/*

 * Copyright 2024 The Android Open Source Project

 *

 * Licensed under the Apache License, Version 2.0 (the "License");

 * you may not use this file except in compliance with the License.

 * You may obtain a copy of the License at

 *

 *      http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

#ifndef ULTRAHDR_GAINMAPMETADATA_H

#define ULTRAHDR_GAINMAPMETADATA_H

#include "ultrahdr/ultrahdrcommon.h"

#include <memory>

#include <vector>

namespace ultrahdr {

constexpr uint8_t kIsMultiChannelMask = (1u << 7);

constexpr uint8_t kUseBaseColorSpaceMask = (1u << 6);

// Gain map metadata, for tone mapping between SDR and HDR.

// This is the fraction version of {@code uhdr_gainmap_metadata_ext_t}.

struct uhdr_gainmap_metadata_frac {

  int32_t gainMapMinN[3];

  uint32_t gainMapMinD[3];

  int32_t gainMapMaxN[3];

  uint32_t gainMapMaxD[3];

  uint32_t gainMapGammaN[3];

  uint32_t gainMapGammaD[3];

  int32_t baseOffsetN[3];

  uint32_t baseOffsetD[3];

  int32_t alternateOffsetN[3];

  uint32_t alternateOffsetD[3];

  uint32_t baseHdrHeadroomN;

  uint32_t baseHdrHeadroomD;

  uint32_t alternateHdrHeadroomN;

  uint32_t alternateHdrHeadroomD;

  bool backwardDirection;

  bool useBaseColorSpace;

  static uhdr_error_info_t encodeGainmapMetadata(const uhdr_gainmap_metadata_frac* in_metadata,

                                                 std::vector<uint8_t>& out_data);

  static uhdr_error_info_t decodeGainmapMetadata(const std::vector<uint8_t>& in_data,

                                                 uhdr_gainmap_metadata_frac* out_metadata);

  static uhdr_error_info_t gainmapMetadataFractionToFloat(const uhdr_gainmap_metadata_frac* from,

                                                          uhdr_gainmap_metadata_ext_t* to);

  static uhdr_error_info_t gainmapMetadataFloatToFraction(const uhdr_gainmap_metadata_ext_t* from,

                                                          uhdr_gainmap_metadata_frac* to);

  bool allChannelsIdentical() const;

  void dump() const {

    ALOGD("GAIN MAP METADATA: \n");

    ALOGD("min numerator:                       %d, %d, %d\n", gainMapMinN[0], gainMapMinN[1],

          gainMapMinN[2]);

    ALOGD("min denominator:                     %d, %d, %d\n", gainMapMinD[0], gainMapMinD[1],

          gainMapMinD[2]);

    ALOGD("max numerator:                       %d, %d, %d\n", gainMapMaxN[0], gainMapMaxN[1],

          gainMapMaxN[2]);

    ALOGD("max denominator:                     %d, %d, %d\n", gainMapMaxD[0], gainMapMaxD[1],

          gainMapMaxD[2]);

    ALOGD("gamma numerator:                     %d, %d, %d\n", gainMapGammaN[0], gainMapGammaN[1],

          gainMapGammaN[2]);

    ALOGD("gamma denominator:                   %d, %d, %d\n", gainMapGammaD[0], gainMapGammaD[1],

          gainMapGammaD[2]);

    ALOGD("SDR offset numerator:                %d, %d, %d\n", baseOffsetN[0], baseOffsetN[1],

          baseOffsetN[2]);

    ALOGD("SDR offset denominator:              %d, %d, %d\n", baseOffsetD[0], baseOffsetD[1],

          baseOffsetD[2]);

    ALOGD("HDR offset numerator:                %d, %d, %d\n", alternateOffsetN[0],

          alternateOffsetN[1], alternateOffsetN[2]);

    ALOGD("HDR offset denominator:              %d, %d, %d\n", alternateOffsetD[0],

          alternateOffsetD[1], alternateOffsetD[2]);

    ALOGD("base HDR head room numerator:        %d\n", baseHdrHeadroomN);

    ALOGD("base HDR head room denominator:      %d\n", baseHdrHeadroomD);

    ALOGD("alternate HDR head room numerator:   %d\n", alternateHdrHeadroomN);

    ALOGD("alternate HDR head room denominator: %d\n", alternateHdrHeadroomD);

    ALOGD("backwardDirection:                   %s\n", backwardDirection ? "true" : "false");

    ALOGD("use base color space:                %s\n", useBaseColorSpace ? "true" : "false");

  }

};

}  // namespace ultrahdr

#endif  // ULTRAHDR_GAINMAPMETADATA_H