#ifndef RESAMPLEDSOUNDDEVICE_HH

#define RESAMPLEDSOUNDDEVICE_HH

#include "SoundDevice.hh"

#include "DynamicClock.hh"

#include "EnumSetting.hh"

#include "Observer.hh"

#include <cstdint>

#include <memory>

namespace openmsx {

class MSXMotherBoard;

class ResampleAlgo;

class Setting;

class ResampledSoundDevice : public SoundDevice, protected Observer<Setting>

{

public:

	enum class ResampleType : uint8_t { HQ, BLIP };

	/** Note: To enable various optimizations (like SSE), this method is

	  * allowed to generate up to 3 extra sample.

	  * @see SoundDevice::updateBuffer()

	  */

	bool generateInput(float* buffer, size_t num);

	[[nodiscard]] DynamicClock& getEmuClock() { return emuClock; }

	// setBalance() might switch between mono/stereo

	void postSetBalance() override {

		createResampler();

		SoundDevice::postSetBalance();

	}

protected:

	ResampledSoundDevice(MSXMotherBoard& motherBoard, std::string_view name,

	                     static_string_view description, unsigned channels,

	                     unsigned inputSampleRate, bool stereo);

	~ResampledSoundDevice();

	// SoundDevice

	void setOutputRate(unsigned hostSampleRate, double speed) override;

	bool updateBuffer(size_t length, float* buffer,

	                  EmuTime time) override;

	// Observer<Setting>

	void update(const Setting& setting) noexcept override;

	void createResampler();

private:

	EnumSetting<ResampleType>& resampleSetting;

	std::unique_ptr<ResampleAlgo> algo;

	DynamicClock emuClock{EmuTime::zero()}; // time of the last produced emu-sample,

	                                        //    ticks once per emu-sample

};

} // namespace openmsx

#endif