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102 lines
3.1 KiB
C++
102 lines
3.1 KiB
C++
//
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// ScanProducer.hpp
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// Clock Signal
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//
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// Created by Thomas Harte on 31/03/2020.
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// Copyright 2020 Thomas Harte. All rights reserved.
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//
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#pragma once
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#include "../Outputs/ScanTarget.hpp"
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#include "../Configurable/StandardOptions.hpp"
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#include "TimedMachine.hpp"
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namespace MachineTypes {
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/*!
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A ScanProducer::Producer is any machine that produces video output of the form accepted
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by a ScanTarget.
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*/
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class ScanProducer {
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public:
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/*!
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Causes the machine to set up its display and, if it has one, speaker.
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The @c scan_target will receive all video output; the caller guarantees
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that it is non-null.
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*/
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virtual void set_scan_target(Outputs::Display::ScanTarget *scan_target) = 0;
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/*!
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@returns The current scan status.
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*/
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virtual Outputs::Display::ScanStatus get_scan_status() const {
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// There's an implicit assumption here that anything which produces scans
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// is also a timed machine. And, also, that this function will be called infrequently.
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const TimedMachine *timed_machine = dynamic_cast<const TimedMachine *>(this);
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return get_scaled_scan_status() / float(timed_machine->get_clock_rate());
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}
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protected:
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virtual Outputs::Display::ScanStatus get_scaled_scan_status() const {
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// This deliberately sets up an infinite loop if the user hasn't
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// overridden at least one of this or get_scan_status.
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//
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// Most likely you want to override this, and let the base class
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// throw in a divide-by-clock-rate at the end for you.
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return get_scan_status();
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}
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/*!
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Maps from Configurable::Display to Outputs::Display::VideoSignal and calls
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@c set_display_type with the result.
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*/
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void set_video_signal_configurable(Configurable::Display type) {
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Outputs::Display::DisplayType display_type;
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switch(type) {
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default:
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case Configurable::Display::RGB:
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display_type = Outputs::Display::DisplayType::RGB;
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break;
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case Configurable::Display::SVideo:
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display_type = Outputs::Display::DisplayType::SVideo;
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break;
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case Configurable::Display::CompositeColour:
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display_type = Outputs::Display::DisplayType::CompositeColour;
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break;
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case Configurable::Display::CompositeMonochrome:
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display_type = Outputs::Display::DisplayType::CompositeMonochrome;
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break;
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}
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set_display_type(display_type);
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}
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/*!
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Maps back from Outputs::Display::VideoSignal to Configurable::Display,
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calling @c get_display_type for the input.
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*/
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Configurable::Display get_video_signal_configurable() const {
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switch(get_display_type()) {
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default:
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case Outputs::Display::DisplayType::RGB: return Configurable::Display::RGB;
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case Outputs::Display::DisplayType::SVideo: return Configurable::Display::SVideo;
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case Outputs::Display::DisplayType::CompositeColour: return Configurable::Display::CompositeColour;
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case Outputs::Display::DisplayType::CompositeMonochrome: return Configurable::Display::CompositeMonochrome;
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}
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}
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/*!
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Sets the display type.
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*/
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virtual void set_display_type(Outputs::Display::DisplayType) {}
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/*!
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Gets the display type.
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*/
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virtual Outputs::Display::DisplayType get_display_type() const { return Outputs::Display::DisplayType::RGB; }
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};
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}
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