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20589f19e4
Until now, Mixer not only was responsible for rendering audio buffers but also managed writing them to audio backend (through a FIFO) and handled various quality related parameters. All this functionality has been moved into the new AudioOutputContext class. It glues together AudioBackend (formerly called AudioDevice), global quality settings and the Mixer. The AudioOutputContext class creates a FifoWriter which calls Mixer::renderNextBuffer() and writes the output into the BufferFifo of the AudioOutputContext it belongs to. The BufferFifo is read by the according AudioBackend which belongs to the AudioOutputContext as well. The AudioOutputContext also handles resampling in case the AudioBackend wants the buffers in a different samplerate. During this rewrite the Mixer class and the according source files have been renamed from "mixer" to "Mixer". This results in small changes all over LMMS' code base.
107 lines
2.7 KiB
C++
107 lines
2.7 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) 2004-2009 Tobias Doerffel <tobydox/at/users.sourceforge.net>
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*
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* This file is part of Linux MultiMedia Studio - http://lmms.sourceforge.net
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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 _AUDIO_FILE_OGG_H
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#define _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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class AudioFileOgg : public AudioFileDevice
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{
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public:
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AudioFileOgg( const sample_rate_t _sample_rate,
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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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const bool _use_vbr,
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const bitrate_t _nom_bitrate,
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const bitrate_t _min_bitrate,
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const bitrate_t _max_bitrate,
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const int _depth,
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AudioOutputContext * context );
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virtual ~AudioFileOgg();
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static AudioFileDevice * getInst( const sample_rate_t _sample_rate,
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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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const bool _use_vbr,
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const bitrate_t _nom_bitrate,
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const bitrate_t _min_bitrate,
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const bitrate_t _max_bitrate,
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const int _depth,
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AudioOutputContext * context )
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{
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return new AudioFileOgg( _sample_rate, _channels, _success_ful,
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_file, _use_vbr, _nom_bitrate,
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_min_bitrate, _max_bitrate, _depth, context );
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}
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private:
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virtual void writeBuffer( const surroundSampleFrame * _ab,
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const fpp_t _frames,
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const float _master_gain );
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bool startEncoding();
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void finishEncoding();
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inline Sint32 writePage();
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bool m_ok;
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ch_cnt_t m_channels;
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sample_rate_t m_rate;
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// Various bitrate/quality options
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bitrate_t m_minBitrate;
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bitrate_t m_maxBitrate;
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Uint32 m_serialNo;
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vorbis_comment * m_comments;
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// encoding setup - init by init_ogg_encoding
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ogg_stream_state m_os;
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ogg_page m_og;
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ogg_packet m_op;
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vorbis_dsp_state m_vd;
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vorbis_block m_vb;
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vorbis_info m_vi;
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} ;
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#endif
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#endif
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