AudioFileMP3.h

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/*
 * AudioFileMP3.h - Audio-device which encodes a wave stream into
 *                  an MP3 file. This is used for song export.
 *
 * Copyright (c) 2017 to present Michael Gregorius <michael.gregorius.git/at/arcor[dot]de>
 *
 * This file is part of LMMS - https://lmms.io
 *
 * 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 (see COPYING); if not, write to the
 * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301 USA.
 *
 */
 
#ifndef LMMS_AUDIO_FILE_MP3_H
#define LMMS_AUDIO_FILE_MP3_H
 
#include "lmmsconfig.h"
 
#ifdef LMMS_HAVE_MP3LAME
 
#include "AudioFileDevice.h"
 
#include "lame/lame.h"
 
namespace lmms
{
 
class AudioFileMP3 : public AudioFileDevice
{
public:
    AudioFileMP3( OutputSettings const & outputSettings,
            const ch_cnt_t _channels,
            bool & successful,
            const QString & _file,
            AudioEngine* audioEngine );
    ~AudioFileMP3() override;
 
    static AudioFileDevice * getInst( const QString & outputFilename,
                      OutputSettings const & outputSettings,
                      const ch_cnt_t channels,
                      AudioEngine* audioEngine,
                      bool & successful )
    {
        return new AudioFileMP3( outputSettings, channels, successful,
                     outputFilename, audioEngine );
    }
 
protected:
    void writeBuffer(const SampleFrame* /* _buf*/, const f_cnt_t /*_frames*/) override;
 
private:
    void flushRemainingBuffers();
    bool initEncoder();
    void tearDownEncoder();
 
private:
    lame_t m_lame;
};
 
} // namespace lmms
 
#endif // LMMS_HAVE_MP3LAME
 
#endif // LMMS_AUDIO_FILE_MP3_H