/*

 * HEIF codec.

 * Copyright (c) 2024 Dirk Farin <dirk.farin@gmail.com>

 *

 * This file is part of libheif.

 *

 * libheif is free software: you can redistribute it and/or modify

 * it under the terms of the GNU Lesser General Public License as

 * published by the Free Software Foundation, either version 3 of

 * the License, or (at your option) any later version.

 *

 * libheif is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU Lesser General Public License for more details.

 *

 * You should have received a copy of the GNU Lesser General Public License

 * along with libheif.  If not, see <http://www.gnu.org/licenses/>.

 */

#include "hevc_dec.h"

#include "hevc_boxes.h"

#include "error.h"

#include "context.h"

#include "plugins/nalu_utils.h"

#include <string>

Result<std::vector<uint8_t>> Decoder_HEVC::read_bitstream_configuration_data() const

{

  std::vector<uint8_t> data;

  if (!m_hvcC->get_header_nals(&data)) {

    return Error{heif_error_Invalid_input,

                 heif_suberror_No_item_data};

  }

  return data;

}

int Decoder_HEVC::get_luma_bits_per_pixel() const

{

  return m_hvcC->get_configuration().bit_depth_luma;

}

int Decoder_HEVC::get_chroma_bits_per_pixel() const

{

  return m_hvcC->get_configuration().bit_depth_chroma;

}

Result<std::optional<ImageSize>> Decoder_HEVC::get_coded_image_size_from_config() const

{

  const auto& nal_arrays = m_hvcC->get_configuration().m_nal_array;

  for (const auto& arr : nal_arrays) {

    if (arr.m_NAL_unit_type != HEVC_NAL_UNIT_SPS_NUT || arr.m_nal_units.empty()) {

      continue;

    }

    const std::vector<uint8_t>& sps = arr.m_nal_units[0];

    HEVCDecoderConfigurationRecord scratch = m_hvcC->get_configuration();

    uint32_t cropped_w = 0, cropped_h = 0;

    ImageSize coded{};

    Error e = parse_sps_for_hvcC_configuration(sps.data(), sps.size(), &scratch,

                                               &cropped_w, &cropped_h, &coded);

    if (e) {

      return e;

    }

    return std::optional<ImageSize>{coded};

  }

  return std::optional<ImageSize>{};

}

Error Decoder_HEVC::get_coded_image_colorspace(heif_colorspace* out_colorspace, heif_chroma* out_chroma) const

{

  *out_chroma = (heif_chroma) (m_hvcC->get_configuration().chroma_format);

  if (*out_chroma == heif_chroma_monochrome) {

    *out_colorspace = heif_colorspace_monochrome;

  }

  else {

    *out_colorspace = heif_colorspace_YCbCr;

  }

  return Error::Ok;

}