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f44aa3edc3
Refactors `AudioFileOgg`, a class used to export to OGG files. There were problems reported of the exported OGG file failing to be played back on some systems. To fix this issue as well as to improve code quality, the class was refactored. In addition, VBR (variable bit rate) is always used, with the quality of the export being determined by a ratio of the selected bit rate and the maximum bit rate allowed. This change naturally occurred when refactoring, though the libvorbisenc documentation recommend VBR for improved audio quality.
75 lines
2.0 KiB
C++
75 lines
2.0 KiB
C++
/*
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* AudioFileOgg.h - Audio-device which encodes wave-stream and writes it
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* into an OGG-file. This is used for song-export.
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*
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* Copyright (c) 2004-2014 Tobias Doerffel <tobydox/at/users.sourceforge.net>
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*
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* This file is part of LMMS - https://lmms.io
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (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 GNU
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* 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
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* License along with this program (see COPYING); if not, write to the
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* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301 USA.
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*
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*/
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#ifndef LMMS_AUDIO_FILE_OGG_H
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#define LMMS_AUDIO_FILE_OGG_H
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#include "lmmsconfig.h"
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#ifdef LMMS_HAVE_OGGVORBIS
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#include <vorbis/codec.h>
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#include "AudioFileDevice.h"
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namespace lmms
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{
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class AudioFileOgg : public AudioFileDevice
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{
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public:
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AudioFileOgg( OutputSettings const & outputSettings,
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const ch_cnt_t _channels,
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bool & _success_ful,
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const QString & _file,
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AudioEngine* audioEngine );
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~AudioFileOgg() override;
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static AudioFileDevice * getInst( const QString & outputFilename,
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OutputSettings const & outputSettings,
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const ch_cnt_t channels,
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AudioEngine* audioEngine,
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bool & successful )
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{
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return new AudioFileOgg( outputSettings, channels, successful, outputFilename, audioEngine );
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}
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private:
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void writeBuffer(const SampleFrame* _ab, const fpp_t _frames) override;
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vorbis_info m_vi;
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vorbis_dsp_state m_vds;
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vorbis_comment m_vc;
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vorbis_block m_vb;
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ogg_stream_state m_oss;
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ogg_packet m_packet;
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ogg_page m_page;
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};
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} // namespace lmms
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#endif // LMMS_HAVE_OGGVORBIS
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#endif // LMMS_AUDIO_FILE_OGG_H
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