/*
 *    Copyright (C) 2016-2021 Grok Image Compression Inc.
 *
 *    This source code is free software: you can redistribute it and/or  modify
 *    it under the terms of the GNU Affero General Public License, version 3,
 *    as published by the Free Software Foundation.
 *
 *    This source code 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 Affero General Public License for more details.
 *
 *    You should have received a copy of the GNU Affero General Public License
 *    along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 *
 *    This source code incorporates work covered by the BSD 2-clause license.
 *    Please see the LICENSE file in the root directory for details.
 *
 */

#pragma once

namespace grk
{
/**
 * Quantization stepsize
 */
struct grk_stepsize
{
	grk_stepsize() : expn(0), mant(0) {}
	/** exponent - 5 bits */
	uint8_t expn;
	/** mantissa  -11 bits */
	uint16_t mant;
};

struct Quantizer
{
  public:
	Quantizer(bool reversible, uint8_t guard_bits);
	virtual ~Quantizer() = default;
	// for compress
	void pull(grk_stepsize* stepptr);
	// for decompress
	void push(grk_stepsize* stepptr);
	virtual void generate(uint32_t decomps, uint32_t max_bit_depth, bool color_transform,
						  bool is_signed);
	virtual bool write(IBufferedStream* stream);

  protected:
	uint32_t get_num_guard_bits() const;
	uint8_t Sqcd;
	union
	{
		uint8_t u8_SPqcd[97];
		uint16_t u16_SPqcd[97];
	};
	uint32_t num_decomps;
	bool isReversible;
};

} // namespace grk
