/*
Copyright (C) 2005 The Pentagram team
Copyright (C) 2010-2022 The Exult team

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

This program 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 General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
*/
#ifndef VocAudioSample_H
#define VocAudioSample_H

#include "AudioSample.h"

namespace Pentagram {

	class VocAudioSample : public AudioSample {
	public:
		VocAudioSample(std::unique_ptr<uint8[]> buffer, uint32 size);

		void   initDecompressor(void* DecompData) const override;
		uint32 decompressFrame(void* DecompData, void* samples) const override;
		void   freeDecompressor(void* DecompData) const override;

		bool isVocSample() const override {
			return true;
		}

		static bool isThis(IDataSource* ds);

	protected:
		struct VocDecompData {
			uint32 pos;
			int    compression;
			int    adpcm_reference;
			int    adpcm_scale;
			int    chunk_remain;    // Bytes remaining in chunk
			int    cur_type;
		};

		static inline int decode_ADPCM_4_sample(
				uint8 sample, int& reference, int& scale);

		static void decode_ADPCM_4(
				uint8* inBuf,
				int    bufSize,      // Size of inbuf
				uint8* outBuf,       // Size is 2x bufsize
				int&   reference,    // ADPCM reference value
				int&   scale);

		bool advanceChunk(void* DecompData) const;
	};

}    // namespace Pentagram

#endif
