/***
    This file is part of snapcast
    Copyright (C) 2014-2018  Johannes Pohl

    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 3 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, see <http://www.gnu.org/licenses/>.
***/

#ifndef OGG_DECODER_H
#define OGG_DECODER_H
#include "decoder.h"
#ifdef HAS_TREMOR
#include <tremor/ivorbiscodec.h>
#else
#include <vorbis/codec.h>
#endif
#include <ogg/ogg.h>

class OggDecoder : public Decoder
{
public:
	OggDecoder();
	virtual ~OggDecoder();
	virtual bool decode(msg::PcmChunk* chunk);
	virtual SampleFormat setHeader(msg::CodecHeader* chunk);

private:
	bool decodePayload(msg::PcmChunk* chunk);
	template <typename T>
	T clip(const T& value, const T& lower, const T& upper) const
	{
		if (value > upper) return upper;
		if (value < lower) return lower;
		return value;
	}

	ogg_sync_state   oy; /// sync and verify incoming physical bitstream
	ogg_stream_state os; /// take physical pages, weld into a logical stream of packets
	ogg_page         og; /// one Ogg bitstream page. Vorbis packets are inside
	ogg_packet       op; /// one raw packet of data for decode

	vorbis_info      vi; /// struct that stores all the static vorbis bitstream settings
	vorbis_comment   vc; /// struct that stores all the bitstream user comments
	vorbis_dsp_state vd; /// central working state for the packet->PCM decoder
	vorbis_block     vb; /// local working space for packet->PCM decode

	SampleFormat sampleFormat_;
};


#endif


