/*
    QMPlay2 is a video and audio player.
    Copyright (C) 2010-2019  Błażej Szczygieł

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU Lesser 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 Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#pragma once

#include <QMPlay2Lib.hpp>

class QByteArray;
class Buffer;

class QMPLAY2SHAREDLIB_EXPORT SndResampler
{
public:
    SndResampler() = default;
    inline ~SndResampler()
    {
        destroy();
    }

    const char *name() const;

    inline bool isOpen() const
    {
        return snd_convert_ctx != nullptr;
    }

    bool create(int _src_samplerate, int _src_channels, int _dst_samplerate, int _dst_channels);
    void convert(const QByteArray &src, QByteArray &dst);
    void convert(const Buffer &src, Buffer &dst);
    void destroy();

private:
    template<typename T>
    void convertInternal(const T &src, T &dst);

private:
#ifdef QMPLAY2_AVRESAMPLE
    struct AVAudioResampleContext *snd_convert_ctx = nullptr;
#else
    struct SwrContext *snd_convert_ctx = nullptr;
#endif
    int src_samplerate = 0, src_channels = 0, dst_samplerate = 0, dst_channels = 0;
};
