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////////////////////////////////////////////////////////////
//
// SFML - Simple and Fast Multimedia Library
// Copyright (C) 2007-2025 Laurent Gomila (laurent@sfml-dev.org)
//
// This software is provided 'as-is', without any express or implied warranty.
// In no event will the authors be held liable for any damages arising from the use of this software.
//
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it freely,
// subject to the following restrictions:
//
// 1. The origin of this software must not be misrepresented;
// you must not claim that you wrote the original software.
// If you use this software in a product, an acknowledgment
// in the product documentation would be appreciated but is not required.
//
// 2. Altered source versions must be plainly marked as such,
// and must not be misrepresented as being the original software.
//
// 3. This notice may not be removed or altered from any source distribution.
//
////////////////////////////////////////////////////////////
#pragma once
////////////////////////////////////////////////////////////
// Headers
////////////////////////////////////////////////////////////
#include <SFML/Audio/Export.hpp>
#include <SFML/Audio/SoundChannel.hpp>
#include <filesystem>
#include <vector>
#include <cstdint>
namespace sf
{
////////////////////////////////////////////////////////////
/// \brief Abstract base class for sound file encoding
///
////////////////////////////////////////////////////////////
class SFML_AUDIO_API SoundFileWriter
{
public:
////////////////////////////////////////////////////////////
/// \brief Virtual destructor
///
////////////////////////////////////////////////////////////
virtual ~SoundFileWriter() = default;
////////////////////////////////////////////////////////////
/// \brief Open a sound file for writing
///
/// \param filename Path of the file to open
/// \param sampleRate Sample rate of the sound
/// \param channelCount Number of channels of the sound
/// \param channelMap Map of position in sample frame to sound channel
///
/// \return `true` if the file was successfully opened
///
////////////////////////////////////////////////////////////
[[nodiscard]] virtual bool open(const std::filesystem::path& filename,
unsigned int sampleRate,
unsigned int channelCount,
const std::vector<SoundChannel>& channelMap) = 0;
////////////////////////////////////////////////////////////
/// \brief Write audio samples to the open file
///
/// \param samples Pointer to the sample array to write
/// \param count Number of samples to write
///
////////////////////////////////////////////////////////////
virtual void write(const std::int16_t* samples, std::uint64_t count) = 0;
};
} // namespace sf
////////////////////////////////////////////////////////////
/// \class sf::SoundFileWriter
/// \ingroup audio
///
/// This class allows users to write audio file formats not natively
/// supported by SFML, and thus extend the set of supported writable
/// audio formats.
///
/// A valid sound file writer must override the open and write functions,
/// as well as providing a static check function; the latter is used by
/// SFML to find a suitable writer for a given filename.
///
/// To register a new writer, use the `sf::SoundFileFactory::registerWriter`
/// template function.
///
/// Usage example:
/// \code
/// class MySoundFileWriter : public sf::SoundFileWriter
/// {
/// public:
///
/// [[nodiscard]] static bool check(const std::filesystem::path& filename)
/// {
/// // typically, check the extension
/// // return true if the writer can handle the format
/// }
///
/// [[nodiscard]] bool open(const std::filesystem::path& filename, unsigned int sampleRate, unsigned int channelCount, const std::vector<SoundChannel>& channelMap) override
/// {
/// // open the file 'filename' for writing,
/// // write the given sample rate and channel count to the file header
/// // return true on success
/// }
///
/// void write(const std::int16_t* samples, std::uint64_t count) override
/// {
/// // write 'count' samples stored at address 'samples',
/// // convert them (for example to normalized float) if the format requires it
/// }
/// };
///
/// sf::SoundFileFactory::registerWriter<MySoundFileWriter>();
/// \endcode
///
/// \see `sf::OutputSoundFile`, `sf::SoundFileFactory`, `sf::SoundFileReader`
///
////////////////////////////////////////////////////////////
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