/*

 * 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 "avif_enc.h"

#include "avif_boxes.h"

#include "error.h"

#include "context.h"

#include "api_structs.h"

#include <string>

Result<Encoder::CodedImageData> Encoder_AVIF::encode(const std::shared_ptr<HeifPixelImage>& image,

                                                     struct heif_encoder* encoder,

                                                     const struct heif_encoding_options& options,

                                                     enum heif_image_input_class input_class)

{

  Encoder::CodedImageData codedImage;

  Box_av1C::configuration config;

  // Fill preliminary av1C in case we cannot parse the sequence_header() correctly in the code below.

  // TODO: maybe we can remove this later.

  fill_av1C_configuration(&config, image);

  heif_image c_api_image;

  c_api_image.image = image;

  struct heif_error err = encoder->plugin->encode_image(encoder->encoder, &c_api_image, input_class);

  if (err.code) {

    return Error(err.code,

                 err.subcode,

                 err.message);

  }

  for (;;) {

    uint8_t* data;

    int size;

    encoder->plugin->get_compressed_data(encoder->encoder, &data, &size, nullptr);

    bool found_config = fill_av1C_configuration_from_stream(&config, data, size);

    (void) found_config;

    if (data == nullptr) {

      break;

    }

    codedImage.append(data, size);

  }

  auto av1C = std::make_shared<Box_av1C>();

  av1C->set_configuration(config);

  codedImage.properties.push_back(av1C);

  codedImage.codingConstraints.intra_pred_used = true;

  codedImage.codingConstraints.all_ref_pics_intra = true; // TODO: change when we use predicted frames

  return codedImage;

}

std::shared_ptr<class Box_VisualSampleEntry> Encoder_AVIF::get_sample_description_box(const CodedImageData& data) const

{

  auto av01 = std::make_shared<Box_av01>();

  av01->get_VisualSampleEntry().compressorname = "AVIF";

  for (auto prop : data.properties) {

    if (prop->get_short_type() == fourcc("av1C")) {

      av01->append_child_box(prop);

      return av01;

    }

  }

  assert(false); // no av1C generated

  return nullptr;

}