/*
 * Copyright (c) 2021 by Allwinnertech Co., Ltd.
 *
 * 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 V4L2_CAMERA_HAL_STREAM_FORMAT_H_
#define V4L2_CAMERA_HAL_STREAM_FORMAT_H_

#include <string.h>
#include <linux/videodev2.h>

#include <string>
#include <map>

#include "common.h"

namespace v4l2_camera_hal {

enum FormatCategory {
  kFormatCategoryRaw,
  kFormatCategoryStalling,
  kFormatCategoryNonStalling,
  kFormatCategoryUnknown,
};

class StreamFormat {
 public:
  StreamFormat(int format, uint32_t width, uint32_t height);
  StreamFormat(const v4l2_format& format, bool mergeStreamFlag);
  virtual ~StreamFormat() = default;
  // Only uint32_t members, use default generated copy and assign.

  void FillFormatRequest(v4l2_format* format) const;
  FormatCategory Category() const;

  // Accessors.
  inline uint32_t type() const { return type_; }
  inline uint32_t memory() const { return memory_; }
  inline uint32_t nplanes() const { return nplanes_; }
  inline uint32_t width() const { return width_; }
  inline uint32_t height() const { return height_; }
  inline uint32_t bytes_per_line() const { return bytes_per_line_; }

  bool operator==(const StreamFormat& other) const;
  bool operator!=(const StreamFormat& other) const;

  // HAL <-> V4L2 conversions
  // Returns 0 for unrecognized.
  static uint32_t HalToV4L2PixelFormat(int hal_pixel_format);
  // Returns -1 for unrecognized.
  static int V4L2ToHalPixelFormat(uint32_t v4l2_pixel_format);
  bool GetMergeStreamFlag();

 private:
  uint32_t type_;
  uint32_t memory_;
  uint32_t nplanes_;
  uint32_t v4l2_pixel_format_;
  uint32_t width_;
  uint32_t height_;
  uint32_t bytes_per_line_;
  bool     merge_stream_flag_;
};

}  // namespace v4l2_camera_hal

#endif  // V4L2_CAMERA_HAL_STREAM_FORMAT_H_