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/*
* Copyright 2003-2017 The Music Player Daemon Project
* http://www.musicpd.org
*
* 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef MPD_OGG_VISITOR_HXX
#define MPD_OGG_VISITOR_HXX
#include "check.h"
#include "OggSyncState.hxx"
#include "OggStreamState.hxx"
#include <ogg/ogg.h>
#include <stddef.h>
class Reader;
/**
* Abstract class which iterates over Ogg packets in a #Reader.
* Subclass it and implement the virtual methods.
*/
class OggVisitor {
OggSyncState sync;
OggStreamState stream;
bool has_stream = false;
public:
explicit OggVisitor(Reader &reader)
:sync(reader), stream(0) {}
long GetSerialNo() const {
return stream.GetSerialNo();
}
void Visit();
/**
* Call this method after seeking the #Reader.
*/
void PostSeek();
private:
void EndStream();
bool ReadNextPage();
void HandlePacket(const ogg_packet &packet);
void HandlePackets();
protected:
virtual void OnOggBeginning(const ogg_packet &packet) = 0;
virtual void OnOggPacket(const ogg_packet &packet) = 0;
virtual void OnOggEnd() = 0;
};
#endif
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