CLK/Machines/Atari/2600/Bus.hpp

//
//  Bus.h
//  Clock Signal
//
//  Created by Thomas Harte on 18/03/2017.
//  Copyright 2017 Thomas Harte. All rights reserved.
//

#pragma once

#include "Atari2600.hpp"
#include "PIA.hpp"
#include "TIA.hpp"
#include "TIASound.hpp"

#include "../../../Analyser/Dynamic/ConfidenceCounter.hpp"
#include "../../../ClockReceiver/ClockReceiver.hpp"
#include "../../../Outputs/Speaker/Implementation/LowpassSpeaker.hpp"

namespace Atari2600 {

class Bus {
public:
	Bus() :
		tia_sound_(audio_queue_),
		speaker_(tia_sound_) {}

	virtual ~Bus() {
		audio_queue_.flush();
	}

	virtual void run_for(const Cycles cycles) = 0;
	virtual void apply_confidence(Analyser::Dynamic::ConfidenceCounter &confidence_counter) = 0;
	virtual void set_reset_line(bool state) = 0;
	virtual void flush() = 0;

	// the RIOT, TIA and speaker
	PIA mos6532_;
	TIA tia_;

	Concurrency::AsyncTaskQueue<false> audio_queue_;
	TIASound tia_sound_;
	Outputs::Speaker::PullLowpass<TIASound> speaker_;

	// joystick state
	uint8_t tia_input_value_[2] = {0xff, 0xff};

protected:
	// speaker backlog accumlation counter
	Cycles cycles_since_speaker_update_;
	inline void update_audio() {
		speaker_.run_for(audio_queue_, cycles_since_speaker_update_.divide(Cycles(CPUTicksPerAudioTick * 3)));
	}

	// video backlog accumulation counter
	Cycles cycles_since_video_update_;
	inline void update_video() {
		tia_.run_for(cycles_since_video_update_.flush<Cycles>());
	}

	// RIOT backlog accumulation counter
	Cycles cycles_since_6532_update_;
	inline void update_6532() {
		mos6532_.run_for(cycles_since_6532_update_.flush<Cycles>());
	}
};

}