istream_source.h

//
// Copyright (c) 2017-2023 Native Instruments GmbH, Berlin
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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//

#pragma once

#include <ios>

namespace audio
{

template<typename source>
class istream_source
{
public:
    using info_type = typename source::info_type;
    using char_type = typename source::char_type;

    virtual ~istream_source() = default;

    virtual std::streampos seek( std::streamoff off, std::ios_base::seekdir dir ) = 0;
    virtual std::streamsize read( char_type* dst, std::streamsize size ) = 0;
    virtual const info_type& info() const = 0;
};

} // namespace audio