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https://github.com/TomHarte/CLK.git
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483 lines
17 KiB
C++
483 lines
17 KiB
C++
//
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// main.cpp
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// Clock Signal
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//
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// Created by Thomas Harte on 04/11/2017.
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// Copyright © 2017 Thomas Harte. All rights reserved.
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//
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#include <cstdio>
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#include <cstring>
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#include <iostream>
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#include <memory>
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#include <SDL2/SDL.h>
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#include "../../StaticAnalyser/StaticAnalyser.hpp"
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#include "../../Machines/Utility/MachineForTarget.hpp"
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#include "../../Machines/ConfigurationTarget.hpp"
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#include "../../Machines/CRTMachine.hpp"
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#include "../../Concurrency/BestEffortUpdater.hpp"
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namespace {
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struct CRTMachineDelegate: public CRTMachine::Machine::Delegate {
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void machine_did_change_clock_rate(CRTMachine::Machine *machine) {
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best_effort_updater->set_clock_rate(machine->get_clock_rate());
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}
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void machine_did_change_clock_is_unlimited(CRTMachine::Machine *machine) {
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}
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Concurrency::BestEffortUpdater *best_effort_updater;
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};
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struct BestEffortUpdaterDelegate: public Concurrency::BestEffortUpdater::Delegate {
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void update(Concurrency::BestEffortUpdater *updater, int cycles, bool did_skip_previous_update) {
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machine->crt_machine()->run_for(Cycles(cycles));
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}
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Machine::DynamicMachine *machine;
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};
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// This is set to a relatively large number for now.
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struct SpeakerDelegate: public Outputs::Speaker::Speaker::Delegate {
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static const int buffer_size = 1024;
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void speaker_did_complete_samples(Outputs::Speaker::Speaker *speaker, const std::vector<int16_t> &buffer) {
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std::lock_guard<std::mutex> lock_guard(audio_buffer_mutex_);
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if(audio_buffer_.size() > buffer_size) {
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audio_buffer_.erase(audio_buffer_.begin(), audio_buffer_.end() - buffer_size);
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}
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audio_buffer_.insert(audio_buffer_.end(), buffer.begin(), buffer.end());
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}
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void audio_callback(Uint8 *stream, int len) {
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updater->update();
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std::lock_guard<std::mutex> lock_guard(audio_buffer_mutex_);
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std::size_t sample_length = static_cast<std::size_t>(len) / sizeof(int16_t);
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std::size_t copy_length = std::min(sample_length, audio_buffer_.size());
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int16_t *target = static_cast<int16_t *>(static_cast<void *>(stream));
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std::memcpy(stream, audio_buffer_.data(), copy_length * sizeof(int16_t));
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if(copy_length < sample_length) {
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std::memset(&target[copy_length], 0, (sample_length - copy_length) * sizeof(int16_t));
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}
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audio_buffer_.erase(audio_buffer_.begin(), audio_buffer_.begin() + copy_length);
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}
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static void SDL_audio_callback(void *userdata, Uint8 *stream, int len) {
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reinterpret_cast<SpeakerDelegate *>(userdata)->audio_callback(stream, len);
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}
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SDL_AudioDeviceID audio_device;
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Concurrency::BestEffortUpdater *updater;
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std::mutex audio_buffer_mutex_;
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std::vector<int16_t> audio_buffer_;
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};
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bool KeyboardKeyForSDLScancode(SDL_Keycode scancode, Inputs::Keyboard::Key &key) {
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#define BIND(x, y) case SDL_SCANCODE_##x: key = Inputs::Keyboard::Key::y; break;
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switch(scancode) {
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default: return false;
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BIND(F1, F1) BIND(F2, F2) BIND(F3, F3) BIND(F4, F4) BIND(F5, F5) BIND(F6, F6)
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BIND(F7, F7) BIND(F8, F8) BIND(F9, F9) BIND(F10, F10) BIND(F11, F11) BIND(F12, F12)
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BIND(1, k1) BIND(2, k2) BIND(3, k3) BIND(4, k4) BIND(5, k5)
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BIND(6, k6) BIND(7, k7) BIND(8, k8) BIND(9, k9) BIND(0, k0)
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BIND(Q, Q) BIND(W, W) BIND(E, E) BIND(R, R) BIND(T, T)
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BIND(Y, Y) BIND(U, U) BIND(I, I) BIND(O, O) BIND(P, P)
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BIND(A, A) BIND(S, S) BIND(D, D) BIND(F, F) BIND(G, G)
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BIND(H, H) BIND(J, J) BIND(K, K) BIND(L, L)
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BIND(Z, Z) BIND(X, X) BIND(C, C) BIND(V, V)
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BIND(B, B) BIND(N, N) BIND(M, M)
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BIND(KP_7, KeyPad7) BIND(KP_8, KeyPad8) BIND(KP_9, KeyPad9)
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BIND(KP_4, KeyPad4) BIND(KP_5, KeyPad5) BIND(KP_6, KeyPad6)
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BIND(KP_1, KeyPad1) BIND(KP_2, KeyPad2) BIND(KP_3, KeyPad3)
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BIND(KP_0, KeyPad0)
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BIND(ESCAPE, Escape)
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BIND(PRINTSCREEN, PrintScreen) BIND(SCROLLLOCK, ScrollLock) BIND(PAUSE, Pause)
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BIND(GRAVE, BackTick) BIND(MINUS, Hyphen) BIND(EQUALS, Equals) BIND(BACKSPACE, BackSpace)
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BIND(TAB, Tab)
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BIND(LEFTBRACKET, OpenSquareBracket) BIND(RIGHTBRACKET, CloseSquareBracket)
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BIND(BACKSLASH, BackSlash)
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BIND(CAPSLOCK, CapsLock) BIND(SEMICOLON, Semicolon)
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BIND(APOSTROPHE, Quote) BIND(RETURN, Enter)
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BIND(LSHIFT, LeftShift) BIND(COMMA, Comma) BIND(PERIOD, FullStop)
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BIND(SLASH, ForwardSlash) BIND(RSHIFT, RightShift)
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BIND(LCTRL, LeftControl) BIND(LALT, LeftOption) BIND(LGUI, LeftMeta)
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BIND(SPACE, Space)
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BIND(RCTRL, RightControl) BIND(RALT, RightOption) BIND(RGUI, RightMeta)
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BIND(LEFT, Left) BIND(RIGHT, Right) BIND(UP, Up) BIND(DOWN, Down)
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BIND(INSERT, Insert) BIND(HOME, Home) BIND(PAGEUP, PageUp)
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BIND(DELETE, Delete) BIND(END, End) BIND(PAGEDOWN, PageDown)
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BIND(NUMLOCKCLEAR, NumLock) BIND(KP_DIVIDE, KeyPadSlash) BIND(KP_MULTIPLY, KeyPadAsterisk)
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BIND(KP_PLUS, KeyPadPlus) BIND(KP_MINUS, KeyPadMinus) BIND(KP_ENTER, KeyPadEnter)
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BIND(KP_DECIMAL, KeyPadDecimalPoint)
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BIND(KP_EQUALS, KeyPadEquals)
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BIND(HELP, Help)
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// SDL doesn't seem to have scancodes for hash or keypad delete?
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}
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#undef BIND
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return true;
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}
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struct ParsedArguments {
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std::string file_name;
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Configurable::SelectionSet selections;
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};
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/*! Parses an argc/argv pair to discern program arguments. */
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ParsedArguments parse_arguments(int argc, char *argv[]) {
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ParsedArguments arguments;
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for(int index = 1; index < argc; ++index) {
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char *arg = argv[index];
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// Accepted format is:
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//
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// --flag sets a Boolean option to true.
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// --flag=value sets the value for a list option.
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// name sets the file name to load.
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// Anything starting with a dash always makes a selection; otherwise it's a file name.
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if(arg[0] == '-') {
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while(*arg == '-') arg++;
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// Check for an equals sign, to discern a Boolean selection from a list selection.
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std::string argument = arg;
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std::size_t split_index = argument.find("=");
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if(split_index == std::string::npos) {
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arguments.selections[argument] = std::unique_ptr<Configurable::Selection>(new Configurable::BooleanSelection(true));
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} else {
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std::string name = argument.substr(0, split_index);
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std::string value = argument.substr(split_index+1, std::string::npos);
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arguments.selections[name] = std::unique_ptr<Configurable::Selection>(new Configurable::ListSelection(value));
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}
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} else {
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arguments.file_name = arg;
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}
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}
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return arguments;
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}
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std::string final_path_component(const std::string &path) {
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// An empty path has no final component.
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if(path.empty()) {
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return "";
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}
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// Find the last slash...
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auto final_slash = path.find_last_of("/\\");
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// If no slash was found at all, return the whole path.
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if(final_slash == std::string::npos) {
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return path;
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}
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// If a slash was found in the final position, remove it and recurse.
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if(final_slash == path.size() - 1) {
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return final_path_component(path.substr(0, path.size() - 1));
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}
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// Otherwise return everything from just after the slash to the end of the path.
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return path.substr(final_slash+1, path.size() - final_slash - 1);
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}
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}
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int main(int argc, char *argv[]) {
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SDL_Window *window = nullptr;
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// Attempt to parse arguments.
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ParsedArguments arguments = parse_arguments(argc, argv);
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// Print a help message if requested.
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if(arguments.selections.find("help") != arguments.selections.end() || arguments.selections.find("h") != arguments.selections.end()) {
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std::cout << "Usage: " << final_path_component(argv[0]) << " [file] [OPTIONS]" << std::endl;
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std::cout << "Use alt+enter to toggle full screen display. Use control+shift+V to paste text." << std::endl;
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std::cout << "Required machine type and configuration is determined from the file. Machines with further options:" << std::endl << std::endl;
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auto all_options = Machine::AllOptionsByMachineName();
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for(auto &machine_options: all_options) {
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std::cout << machine_options.first << ":" << std::endl;
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for(auto &option: machine_options.second) {
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std::cout << '\t' << "--" << option->short_name;
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Configurable::ListOption *list_option = dynamic_cast<Configurable::ListOption *>(option.get());
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if(list_option) {
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std::cout << "={";
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bool is_first = true;
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for(auto option: list_option->options) {
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if(!is_first) std::cout << '|';
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is_first = false;
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std::cout << option;
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}
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std::cout << "}";
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}
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std::cout << std::endl;
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}
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std::cout << std::endl;
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}
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return 0;
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}
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// Perform a sanity check on arguments.
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if(arguments.file_name.empty()) {
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std::cerr << "Usage: " << final_path_component(argv[0]) << " [file] [OPTIONS]" << std::endl;
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std::cerr << "Use --help to learn more about available options." << std::endl;
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return -1;
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}
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// Determine the machine for the supplied file.
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std::list<StaticAnalyser::Target> targets = StaticAnalyser::GetTargets(arguments.file_name.c_str());
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if(targets.empty()) {
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std::cerr << "Cannot open " << arguments.file_name << std::endl;
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return -1;
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}
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Concurrency::BestEffortUpdater updater;
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BestEffortUpdaterDelegate best_effort_updater_delegate;
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CRTMachineDelegate crt_delegate;
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SpeakerDelegate speaker_delegate;
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// Create and configure a machine.
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std::unique_ptr<::Machine::DynamicMachine> machine(::Machine::MachineForTarget(targets.front()));
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updater.set_clock_rate(machine->crt_machine()->get_clock_rate());
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crt_delegate.best_effort_updater = &updater;
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best_effort_updater_delegate.machine = machine.get();
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speaker_delegate.updater = &updater;
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machine->crt_machine()->set_delegate(&crt_delegate);
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updater.set_delegate(&best_effort_updater_delegate);
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// Attempt to set up video and audio.
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if(SDL_Init(SDL_INIT_VIDEO | SDL_INIT_AUDIO) < 0) {
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std::cerr << "SDL could not initialize! SDL_Error: " << SDL_GetError() << std::endl;
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return -1;
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}
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// Ask for no depth buffer, a core profile and vsync-aligned rendering.
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SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 0);
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SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_CORE);
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SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 3);
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SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 2);
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SDL_GL_SetSwapInterval(1);
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window = SDL_CreateWindow( final_path_component(arguments.file_name).c_str(),
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SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED,
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400, 300,
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SDL_WINDOW_OPENGL | SDL_WINDOW_RESIZABLE);
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if(!window)
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{
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std::cerr << "Could not create window" << std::endl;
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return -1;
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}
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SDL_GLContext gl_context = SDL_GL_CreateContext(window);
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SDL_GL_MakeCurrent(window, gl_context);
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GLint target_framebuffer = 0;
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glGetIntegerv(GL_FRAMEBUFFER_BINDING, &target_framebuffer);
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// For vanilla SDL purposes, assume system ROMs can be found in one of:
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//
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// /usr/local/share/CLK/[system]; or
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// /usr/share/CLK/[system]
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std::vector<std::string> rom_names;
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std::string machine_name;
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bool roms_loaded = machine->crt_machine()->set_rom_fetcher( [&rom_names, &machine_name]
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(const std::string &machine, const std::vector<std::string> &names) -> std::vector<std::unique_ptr<std::vector<uint8_t>>> {
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rom_names.insert(rom_names.end(), names.begin(), names.end());
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machine_name = machine;
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std::vector<std::unique_ptr<std::vector<uint8_t>>> results;
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for(auto &name: names) {
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std::string local_path = "/usr/local/share/CLK/" + machine + "/" + name;
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FILE *file = std::fopen(local_path.c_str(), "rb");
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if(!file) {
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std::string path = "/usr/share/CLK/" + machine + "/" + name;
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file = std::fopen(path.c_str(), "rb");
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}
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if(!file) {
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results.emplace_back(nullptr);
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continue;
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}
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std::unique_ptr<std::vector<uint8_t>> data(new std::vector<uint8_t>);
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std::fseek(file, 0, SEEK_END);
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data->resize(std::ftell(file));
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std::fseek(file, 0, SEEK_SET);
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std::size_t read = fread(data->data(), 1, data->size(), file);
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std::fclose(file);
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if(read == data->size())
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results.emplace_back(std::move(data));
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else
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results.emplace_back(nullptr);
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}
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return results;
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});
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if(!roms_loaded) {
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std::cerr << "Could not find system ROMs; please install to /usr/local/share/CLK/ or /usr/share/CLK/." << std::endl;
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std::cerr << "One or more of the following were needed but not found:" << std::endl;
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for(auto &name: rom_names) {
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std::cerr << machine_name << '/' << name << std::endl;
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}
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return -1;
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}
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machine->configuration_target()->configure_as_target(targets.front());
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// Setup output, assuming a CRT machine for now, and prepare a best-effort updater.
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machine->crt_machine()->setup_output(4.0 / 3.0);
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machine->crt_machine()->get_crt()->set_output_gamma(2.2f);
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machine->crt_machine()->get_crt()->set_target_framebuffer(target_framebuffer);
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// For now, lie about audio output intentions.
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auto speaker = machine->crt_machine()->get_speaker();
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if(speaker) {
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// Create an audio pipe.
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SDL_AudioSpec desired_audio_spec;
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SDL_AudioSpec obtained_audio_spec;
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SDL_zero(desired_audio_spec);
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desired_audio_spec.freq = 48000; // TODO: how can I get SDL to reveal the output rate of this machine?
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desired_audio_spec.format = AUDIO_S16;
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desired_audio_spec.channels = 1;
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desired_audio_spec.samples = SpeakerDelegate::buffer_size;
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desired_audio_spec.callback = SpeakerDelegate::SDL_audio_callback;
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desired_audio_spec.userdata = &speaker_delegate;
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speaker_delegate.audio_device = SDL_OpenAudioDevice(nullptr, 0, &desired_audio_spec, &obtained_audio_spec, SDL_AUDIO_ALLOW_FREQUENCY_CHANGE);
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speaker->set_output_rate(obtained_audio_spec.freq, desired_audio_spec.samples);
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speaker->set_delegate(&speaker_delegate);
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SDL_PauseAudioDevice(speaker_delegate.audio_device, 0);
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}
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int window_width, window_height;
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SDL_GetWindowSize(window, &window_width, &window_height);
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// Establish user-friendly options by default.
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Configurable::Device *configurable_device = machine->configurable_device();
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if(configurable_device) {
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configurable_device->set_selections(configurable_device->get_user_friendly_selections());
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// Consider transcoding any list selections that map to Boolean options.
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for(auto &option: configurable_device->get_options()) {
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// Check for a corresponding selection.
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auto selection = arguments.selections.find(option->short_name);
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if(selection != arguments.selections.end()) {
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// Transcode selection if necessary.
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if(dynamic_cast<Configurable::BooleanOption *>(option.get())) {
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arguments.selections[selection->first] = std::unique_ptr<Configurable::Selection>(selection->second->boolean_selection());
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}
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if(dynamic_cast<Configurable::ListOption *>(option.get())) {
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arguments.selections[selection->first] = std::unique_ptr<Configurable::Selection>(selection->second->list_selection());
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}
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}
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}
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configurable_device->set_selections(arguments.selections);
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}
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// Run the main event loop until the OS tells us to quit.
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bool should_quit = false;
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Uint32 fullscreen_mode = 0;
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while(!should_quit) {
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// Process all pending events.
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SDL_Event event;
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while(SDL_PollEvent(&event)) {
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switch(event.type) {
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case SDL_QUIT: should_quit = true; break;
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case SDL_WINDOWEVENT:
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switch (event.window.event) {
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case SDL_WINDOWEVENT_RESIZED: {
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GLint target_framebuffer = 0;
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glGetIntegerv(GL_FRAMEBUFFER_BINDING, &target_framebuffer);
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machine->crt_machine()->get_crt()->set_target_framebuffer(target_framebuffer);
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SDL_GetWindowSize(window, &window_width, &window_height);
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} break;
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default: break;
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}
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break;
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case SDL_DROPFILE: {
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StaticAnalyser::Media media = StaticAnalyser::GetMedia(event.drop.file);
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machine->configuration_target()->insert_media(media);
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} break;
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case SDL_KEYDOWN:
|
|
// Syphon off the key-press if it's control+shift+V (paste).
|
|
if(event.key.keysym.sym == SDLK_v && (SDL_GetModState()&KMOD_CTRL) && (SDL_GetModState()&KMOD_SHIFT)) {
|
|
Utility::TypeRecipient *type_recipient = machine->type_recipient();
|
|
if(type_recipient) {
|
|
type_recipient->set_typer_for_string(SDL_GetClipboardText());
|
|
break;
|
|
}
|
|
}
|
|
|
|
// Also syphon off alt+enter (toggle full-screen).
|
|
if(event.key.keysym.sym == SDLK_RETURN && (SDL_GetModState()&KMOD_ALT)) {
|
|
fullscreen_mode ^= SDL_WINDOW_FULLSCREEN_DESKTOP;
|
|
SDL_SetWindowFullscreen(window, fullscreen_mode);
|
|
SDL_ShowCursor((fullscreen_mode&SDL_WINDOW_FULLSCREEN_DESKTOP) ? SDL_DISABLE : SDL_ENABLE);
|
|
break;
|
|
}
|
|
|
|
// deliberate fallthrough...
|
|
case SDL_KEYUP: {
|
|
KeyboardMachine::Machine *keyboard_machine = machine->keyboard_machine();
|
|
if(!keyboard_machine) break;
|
|
|
|
Inputs::Keyboard::Key key = Inputs::Keyboard::Key::Space;
|
|
if(!KeyboardKeyForSDLScancode(event.key.keysym.scancode, key)) break;
|
|
keyboard_machine->get_keyboard().set_key_pressed(key, event.type == SDL_KEYDOWN);
|
|
} break;
|
|
|
|
default: break;
|
|
}
|
|
}
|
|
|
|
// Display a new frame and wait for vsync.
|
|
updater.update();
|
|
machine->crt_machine()->get_crt()->draw_frame(static_cast<unsigned int>(window_width), static_cast<unsigned int>(window_height), false);
|
|
SDL_GL_SwapWindow(window);
|
|
}
|
|
|
|
// Clean up.
|
|
SDL_DestroyWindow( window );
|
|
SDL_Quit();
|
|
|
|
return 0;
|
|
}
|