68 lines
1.7 KiB
C++
68 lines
1.7 KiB
C++
/*
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* Copyright 2003-2020 The Music Player Daemon Project
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* http://www.musicpd.org
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef MPD_OGG_DECODER_HXX
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#define MPD_OGG_DECODER_HXX
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#include "lib/xiph/OggVisitor.hxx"
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#include "decoder/Reader.hxx"
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#include "input/Offset.hxx"
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class OggDecoder : public OggVisitor {
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ogg_int64_t end_granulepos;
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protected:
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DecoderClient &client;
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InputStream &input_stream;
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public:
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explicit OggDecoder(DecoderReader &reader)
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:OggVisitor(reader),
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client(reader.GetClient()),
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input_stream(reader.GetInputStream()) {}
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private:
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/**
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* Load the end-of-stream packet and restore the previous file
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* position.
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*/
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bool LoadEndPacket(ogg_packet &packet) const;
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ogg_int64_t LoadEndGranulePos() const;
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protected:
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ogg_int64_t UpdateEndGranulePos() {
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return end_granulepos = LoadEndGranulePos();
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}
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bool IsSeekable() const {
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return end_granulepos > 0;
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}
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/**
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* Seek the #InputStream and update the #OggVisitor.
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*
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* Throws on error.
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*/
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void SeekByte(offset_type offset);
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void SeekGranulePos(ogg_int64_t where_granulepos);
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};
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#endif
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