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/***
Olive - Non-Linear Video Editor
Copyright (C) 2019 Olive Team
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 3 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, see <http://www.gnu.org/licenses/>.
***/
#ifndef AUDIOOUTPUTDEVICEPROXY_H
#define AUDIOOUTPUTDEVICEPROXY_H
#include <QFile>
#include "common/define.h"
#include "tempoprocessor.h"
OLIVE_NAMESPACE_ENTER
/**
* @brief QIODevice wrapper that can adjust speed/reverse an audio file
*/
class AudioOutputDeviceProxy : public QIODevice
{
Q_OBJECT
public:
AudioOutputDeviceProxy() = default;
virtual ~AudioOutputDeviceProxy() override;
void SetParameters(const AudioParams& params);
void SetDevice(const QString &filename, qint64 offset, int playback_speed);
virtual void close() override;
protected:
virtual qint64 readData(char *data, qint64 maxlen) override;
virtual qint64 writeData(const char *data, qint64 maxSize) override;
private:
qint64 ReverseAwareRead(char* data, qint64 maxlen);
QFile file_;
TempoProcessor tempo_processor_;
AudioParams params_;
int playback_speed_;
};
OLIVE_NAMESPACE_EXIT
#endif // AUDIOOUTPUTDEVICEPROXY_H
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