/*
 * libmedia mp4 colr box parser
 *
 * 版权所有 (C) 2024 赵高兴
 * Copyright (C) 2024 Gaoxing Zhao
 *
 * 此文件是 libmedia 的一部分
 * This file is part of libmedia.
 * 
 * libmedia 是自由软件；您可以根据 GNU Lesser General Public License（GNU LGPL）3.1
 * 或任何其更新的版本条款重新分发或修改它
 * libmedia 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 3.1 of the License, or (at your option) any later version.
 * 
 * libmedia 希望能够为您提供帮助，但不提供任何明示或暗示的担保，包括但不限于适销性或特定用途的保证
 * 您应自行承担使用 libmedia 的风险，并且需要遵守 GNU Lesser General Public License 中的条款和条件。
 * libmedia 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.
 *
 */

import type { Atom, IsobmffContext } from '../type'
import { logger } from '@libmedia/common'
import { type IOReader } from '@libmedia/common/io'
import {
  AVColorRange,
  AVColorPrimaries,
  AVColorTransferCharacteristic,
  AVColorSpace,
  AVPacketSideDataType,
  AVStream,
  type AVStreamGroupTileGrid
} from '@libmedia/avutil'

export default async function read(ioReader: IOReader, stream: AVStream | AVStreamGroupTileGrid, atom: Atom, isobmffContext: IsobmffContext) {

  const now = ioReader.getPos()

  let colorParameterType = await ioReader.readString(4)

  if (colorParameterType === 'nclx'
    || colorParameterType === 'nclc'
    || colorParameterType === 'prof'
  ) {
    if (colorParameterType === 'prof') {
      const buffer = await ioReader.readBuffer(atom.size - 4)
      stream.sideData[AVPacketSideDataType.AV_PKT_DATA_ICC_PROFILE] = buffer
    }
    else if (stream instanceof AVStream) {
      let colorPrimaries = await ioReader.readUint16()
      let colorTrc = await ioReader.readUint16()
      let colorMatrix = await ioReader.readUint16()
      if (colorParameterType === 'nclx') {
        const colorRange = await ioReader.readUint8() >> 7
        if (colorRange) {
          stream.codecpar.colorRange = AVColorRange.AVCOL_RANGE_JPEG
        }
        else {
          stream.codecpar.colorRange = AVColorRange.AVCOL_RANGE_MPEG
        }
      }

      if (colorPrimaries >= AVColorPrimaries.AVCOL_PRI_NB) {
        colorPrimaries = AVColorPrimaries.AVCOL_PRI_UNSPECIFIED
      }
      if (colorTrc >= AVColorTransferCharacteristic.AVCOL_TRC_NB) {
        colorTrc = AVColorTransferCharacteristic.AVCOL_TRC_UNSPECIFIED
      }
      if (colorMatrix >= AVColorSpace.AVCOL_SPC_NB) {
        colorMatrix = AVColorSpace.AVCOL_SPC_UNSPECIFIED
      }

      stream.codecpar.colorPrimaries = colorPrimaries
      stream.codecpar.colorTrc = colorTrc
      stream.codecpar.colorSpace = colorMatrix
    }
  }
  else {
    logger.warn(`unsupported color_parameter_type: ${colorParameterType}`)
  }

  const remainingLength = atom.size - Number(ioReader.getPos() - now)
  if (remainingLength > 0) {
    await ioReader.skip(remainingLength)
  }
  else if (remainingLength < 0) {
    logger.error(`read colr error, size: ${atom.size}, read: ${atom.size - remainingLength}`)
  }
}