chore: change directory structure

This commit is contained in:
Rekai Nyangadzayi Musuka 2022-07-22 20:19:31 -03:00
parent c7c4a90948
commit 53191b0eeb
34 changed files with 249 additions and 248 deletions

193
src/Gui.zig Normal file
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@ -0,0 +1,193 @@
const std = @import("std");
const SDL = @import("sdl2");
const Self = @This();
const Apu = @import("core/apu.zig").Apu;
const Arm7tdmi = @import("core/cpu.zig").Arm7tdmi;
const Scheduler = @import("core/scheduler.zig").Scheduler;
const FpsTracker = @import("core/util.zig").FpsTracker;
const pitch = @import("core/ppu.zig").framebuf_pitch;
const emu = @import("core/emu.zig");
const asString = @import("core/util.zig").asString;
const log = std.log.scoped(.GUI);
const scale = 4;
const default_title: []const u8 = "ZBA";
window: *SDL.SDL_Window,
base_title: [12]u8,
renderer: *SDL.SDL_Renderer,
texture: *SDL.SDL_Texture,
audio: ?Audio,
pub fn init(title: [12]u8, width: i32, height: i32) Self {
const ret = SDL.SDL_Init(SDL.SDL_INIT_VIDEO | SDL.SDL_INIT_EVENTS | SDL.SDL_INIT_AUDIO | SDL.SDL_INIT_GAMECONTROLLER);
if (ret < 0) panic();
const window = SDL.SDL_CreateWindow(
default_title.ptr,
SDL.SDL_WINDOWPOS_CENTERED,
SDL.SDL_WINDOWPOS_CENTERED,
@as(c_int, width * scale),
@as(c_int, height * scale),
SDL.SDL_WINDOW_SHOWN,
) orelse panic();
const renderer = SDL.SDL_CreateRenderer(window, -1, SDL.SDL_RENDERER_ACCELERATED | SDL.SDL_RENDERER_PRESENTVSYNC) orelse panic();
const texture = SDL.SDL_CreateTexture(
renderer,
SDL.SDL_PIXELFORMAT_RGBA8888,
SDL.SDL_TEXTUREACCESS_STREAMING,
@as(c_int, width),
@as(c_int, height),
) orelse panic();
return Self{
.window = window,
.base_title = title,
.renderer = renderer,
.texture = texture,
.audio = null,
};
}
pub fn run(self: *Self, arm7tdmi: *Arm7tdmi, scheduler: *Scheduler) !void {
var quit = std.atomic.Atomic(bool).init(false);
var frame_rate = FpsTracker.init();
const thread = try std.Thread.spawn(.{}, emu.run, .{ &quit, &frame_rate, scheduler, arm7tdmi });
defer thread.join();
var title_buf: [0x100]u8 = [_]u8{0} ** 0x100;
emu_loop: while (true) {
var event: SDL.SDL_Event = undefined;
while (SDL.SDL_PollEvent(&event) != 0) {
switch (event.type) {
SDL.SDL_QUIT => break :emu_loop,
SDL.SDL_KEYDOWN => {
const io = &arm7tdmi.bus.io;
const key_code = event.key.keysym.sym;
switch (key_code) {
SDL.SDLK_UP => io.keyinput.up.unset(),
SDL.SDLK_DOWN => io.keyinput.down.unset(),
SDL.SDLK_LEFT => io.keyinput.left.unset(),
SDL.SDLK_RIGHT => io.keyinput.right.unset(),
SDL.SDLK_x => io.keyinput.a.unset(),
SDL.SDLK_z => io.keyinput.b.unset(),
SDL.SDLK_a => io.keyinput.shoulder_l.unset(),
SDL.SDLK_s => io.keyinput.shoulder_r.unset(),
SDL.SDLK_RETURN => io.keyinput.start.unset(),
SDL.SDLK_RSHIFT => io.keyinput.select.unset(),
else => {},
}
},
SDL.SDL_KEYUP => {
const io = &arm7tdmi.bus.io;
const key_code = event.key.keysym.sym;
switch (key_code) {
SDL.SDLK_UP => io.keyinput.up.set(),
SDL.SDLK_DOWN => io.keyinput.down.set(),
SDL.SDLK_LEFT => io.keyinput.left.set(),
SDL.SDLK_RIGHT => io.keyinput.right.set(),
SDL.SDLK_x => io.keyinput.a.set(),
SDL.SDLK_z => io.keyinput.b.set(),
SDL.SDLK_a => io.keyinput.shoulder_l.set(),
SDL.SDLK_s => io.keyinput.shoulder_r.set(),
SDL.SDLK_RETURN => io.keyinput.start.set(),
SDL.SDLK_RSHIFT => io.keyinput.select.set(),
SDL.SDLK_i => log.err("Sample Count: {}", .{@intCast(u32, SDL.SDL_AudioStreamAvailable(arm7tdmi.bus.apu.stream)) / (2 * @sizeOf(u16))}),
SDL.SDLK_j => log.err("Scheduler Capacity: {} | Scheduler Event Count: {}", .{ scheduler.queue.capacity(), scheduler.queue.count() }),
SDL.SDLK_k => {
// Dump IWRAM to file
log.info("PC: 0x{X:0>8}", .{arm7tdmi.r[15]});
log.info("LR: 0x{X:0>8}", .{arm7tdmi.r[14]});
// const iwram_file = try std.fs.cwd().createFile("iwram.bin", .{});
// defer iwram_file.close();
// try iwram_file.writeAll(cpu.bus.iwram.buf);
},
else => {},
}
},
else => {},
}
}
// Emulator has an internal Double Buffer
const framebuf = arm7tdmi.bus.ppu.framebuf.get(.Renderer);
_ = SDL.SDL_UpdateTexture(self.texture, null, framebuf.ptr, pitch);
_ = SDL.SDL_RenderCopy(self.renderer, self.texture, null, null);
SDL.SDL_RenderPresent(self.renderer);
const title = std.fmt.bufPrint(&title_buf, "ZBA | {s} [Emu: {}fps] ", .{ self.base_title, frame_rate.value() }) catch unreachable;
SDL.SDL_SetWindowTitle(self.window, title.ptr);
}
quit.store(true, .SeqCst); // Terminate Emulator Thread
}
pub fn initAudio(self: *Self, apu: *Apu) void {
self.audio = Audio.init(apu);
self.audio.?.play();
}
pub fn deinit(self: Self) void {
if (self.audio) |aud| aud.deinit();
SDL.SDL_DestroyTexture(self.texture);
SDL.SDL_DestroyRenderer(self.renderer);
SDL.SDL_DestroyWindow(self.window);
SDL.SDL_Quit();
}
const Audio = struct {
const This = @This();
const sample_rate = @import("core/apu.zig").host_sample_rate;
device: SDL.SDL_AudioDeviceID,
fn init(apu: *Apu) This {
var have: SDL.SDL_AudioSpec = undefined;
var want: SDL.SDL_AudioSpec = std.mem.zeroes(SDL.SDL_AudioSpec);
want.freq = sample_rate;
want.format = SDL.AUDIO_U16;
want.channels = 2;
want.samples = 0x100;
want.callback = This.callback;
want.userdata = apu;
const device = SDL.SDL_OpenAudioDevice(null, 0, &want, &have, 0);
if (device == 0) panic();
return .{
.device = device,
};
}
fn deinit(this: This) void {
SDL.SDL_CloseAudioDevice(this.device);
}
pub fn play(this: *This) void {
SDL.SDL_PauseAudioDevice(this.device, 0);
}
export fn callback(userdata: ?*anyopaque, stream: [*c]u8, len: c_int) void {
const apu = @ptrCast(*Apu, @alignCast(@alignOf(*Apu), userdata));
const written = SDL.SDL_AudioStreamGet(apu.stream, stream, len);
// If we don't write anything, play silence otherwise garbage will be played
// FIXME: I don't think this hack to remove DC Offset is acceptable :thinking:
if (written == 0) std.mem.set(u8, stream[0..@intCast(usize, len)], 0x40);
}
};
fn panic() noreturn {
const str = @as(?[*:0]const u8, SDL.SDL_GetError()) orelse "unknown error";
@panic(std.mem.sliceTo(str, 0));
}

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@ -53,7 +53,7 @@ pub const ThumbInstrFn = fn (*Arm7tdmi, *Bus, u16) void;
const arm_lut: [0x1000]ArmInstrFn = armPopulate();
const thumb_lut: [0x400]ThumbInstrFn = thumbPopulate();
const enable_logging = @import("main.zig").enable_logging;
const enable_logging = false;
const log = std.log.scoped(.Arm7Tdmi);
pub const Arm7tdmi = struct {

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@ -5,10 +5,12 @@ const Bus = @import("Bus.zig");
const Scheduler = @import("scheduler.zig").Scheduler;
const Arm7tdmi = @import("cpu.zig").Arm7tdmi;
const FpsTracker = @import("util.zig").FpsTracker;
const FilePaths = @import("util.zig").FilePaths;
const Timer = std.time.Timer;
const Thread = std.Thread;
const Atomic = std.atomic.Atomic;
const Allocator = std.mem.Allocator;
const sync_audio = false;
const sync_video: RunKind = .UnlimitedFPS;

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@ -1,35 +1,21 @@
const std = @import("std");
const builtin = @import("builtin");
const SDL = @import("sdl2");
const clap = @import("clap");
const known_folders = @import("known_folders");
const clap = @import("clap");
const emu = @import("emu.zig");
const Bus = @import("Bus.zig");
const Apu = @import("apu.zig").Apu;
const Arm7tdmi = @import("cpu.zig").Arm7tdmi;
const Scheduler = @import("scheduler.zig").Scheduler;
const FpsTracker = @import("util.zig").FpsTracker;
const Gui = @import("Gui.zig");
const Arm7tdmi = @import("core/cpu.zig").Arm7tdmi;
const Scheduler = @import("core/scheduler.zig").Scheduler;
const FilePaths = @import("core/util.zig").FilePaths;
const Timer = std.time.Timer;
const Thread = std.Thread;
const Atomic = std.atomic.Atomic;
const File = std.fs.File;
const window_scale = 4;
const gba_width = @import("ppu.zig").width;
const gba_height = @import("ppu.zig").height;
const framebuf_pitch = @import("ppu.zig").framebuf_pitch;
const expected_rate = @import("emu.zig").frame_rate;
const sample_rate = @import("apu.zig").host_sample_rate;
pub const enable_logging: bool = false;
const is_binary: bool = false;
const log = std.log.scoped(.GUI);
const Allocator = std.mem.Allocator;
const log = std.log.scoped(.CLI);
const width = @import("core/ppu.zig").width;
const height = @import("core/ppu.zig").height;
pub const log_level = if (builtin.mode != .Debug) .info else std.log.default_level;
const asString = @import("util.zig").asString;
// TODO: Reimpl Logging
// CLI Arguments + Help Text
const params = clap.parseParamsComptime(
@ -40,251 +26,71 @@ const params = clap.parseParamsComptime(
);
pub fn main() anyerror!void {
// Allocator for Emulator + CLI
// Main Allocator for ZBA
var gpa = std.heap.GeneralPurposeAllocator(.{}){};
defer std.debug.assert(!gpa.deinit());
const alloc = gpa.allocator();
const allocator = gpa.allocator();
// Setup CLI using zig-clap
var res = try clap.parse(clap.Help, &params, clap.parsers.default, .{});
defer res.deinit();
// Handle CLI Input
const result = try clap.parse(clap.Help, &params, clap.parsers.default, .{});
defer result.deinit();
const stderr = std.io.getStdErr();
defer stderr.close();
const paths = try handleArguments(allocator, &result);
defer if (paths.save) |path| allocator.free(path);
// Display Help, if requested
// Grab ROM and BIOS paths if provided
if (res.args.help) return clap.help(stderr.writer(), clap.Help, &params, .{});
const rom_path = try getRomPath(res, stderr);
const bios_path: ?[]const u8 = if (res.args.bios) |p| p else null;
// Determine Save Directory
const save_dir = try getSavePath(alloc);
defer if (save_dir) |path| alloc.free(path);
log.info("Found save directory: {s}", .{save_dir});
// Initialize Scheduler and ARM7TDMI Emulator
// Provide GBA Bus (initialized with ARM7TDMI) with a valid ptr to ARM7TDMI
var scheduler = Scheduler.init(alloc);
// TODO: Take Emulator Init Code out of main.zig
var scheduler = Scheduler.init(allocator);
defer scheduler.deinit();
const paths = .{ .bios = bios_path, .rom = rom_path, .save = save_dir };
var cpu = try Arm7tdmi.init(alloc, &scheduler, paths);
defer cpu.deinit();
cpu.bus.attach(&cpu);
// cpu.fastBoot(); // Uncomment to skip BIOS
var arm7tdmi = try Arm7tdmi.init(allocator, &scheduler, paths);
arm7tdmi.bus.attach(&arm7tdmi);
if (paths.bios == null) arm7tdmi.fastBoot();
defer arm7tdmi.deinit();
// Copy ROM title while Emulator still belongs to this thread
const title = cpu.bus.pak.title;
var gui = Gui.init(arm7tdmi.bus.pak.title, width, height);
gui.initAudio(&arm7tdmi.bus.apu);
defer gui.deinit();
// Initialize SDL2
initSdl2();
defer SDL.SDL_Quit();
const dev = initAudio(&cpu.bus.apu);
defer SDL.SDL_CloseAudioDevice(dev);
// TODO: Refactor or delete this Logging code
// I probably still need logging in some form though (e.g. Golden Sun IIRC)
const log_file: ?File = if (enable_logging) blk: {
const file = try std.fs.cwd().createFile(if (is_binary) "zba.bin" else "zba.log", .{});
cpu.useLogger(&file, is_binary);
break :blk file;
} else null;
defer if (log_file) |file| file.close();
var quit = Atomic(bool).init(false);
var emu_rate = FpsTracker.init();
// Run Emulator in it's separate thread
// From this point on, interacting with Arm7tdmi or Scheduler
// be justified, as it will require to be thread-afe
const emu_thread = try Thread.spawn(.{}, emu.run, .{ &quit, &emu_rate, &scheduler, &cpu });
defer emu_thread.join();
var title_buf: [0x20]u8 = std.mem.zeroes([0x20]u8);
const window_title = try std.fmt.bufPrint(&title_buf, "ZBA | {s}", .{asString(title)});
const window = createWindow(window_title, gba_width, gba_height);
defer SDL.SDL_DestroyWindow(window);
const renderer = createRenderer(window);
defer SDL.SDL_DestroyRenderer(renderer);
const texture = createTexture(renderer, gba_width, gba_height);
defer SDL.SDL_DestroyTexture(texture);
// Init FPS Timer
var dyn_title_buf: [0x100]u8 = [_]u8{0x00} ** 0x100;
emu_loop: while (true) {
var event: SDL.SDL_Event = undefined;
while (SDL.SDL_PollEvent(&event) != 0) {
switch (event.type) {
SDL.SDL_QUIT => break :emu_loop,
SDL.SDL_KEYDOWN => {
const io = &cpu.bus.io;
const key_code = event.key.keysym.sym;
switch (key_code) {
SDL.SDLK_UP => io.keyinput.up.unset(),
SDL.SDLK_DOWN => io.keyinput.down.unset(),
SDL.SDLK_LEFT => io.keyinput.left.unset(),
SDL.SDLK_RIGHT => io.keyinput.right.unset(),
SDL.SDLK_x => io.keyinput.a.unset(),
SDL.SDLK_z => io.keyinput.b.unset(),
SDL.SDLK_a => io.keyinput.shoulder_l.unset(),
SDL.SDLK_s => io.keyinput.shoulder_r.unset(),
SDL.SDLK_RETURN => io.keyinput.start.unset(),
SDL.SDLK_RSHIFT => io.keyinput.select.unset(),
else => {},
}
},
SDL.SDL_KEYUP => {
const io = &cpu.bus.io;
const key_code = event.key.keysym.sym;
switch (key_code) {
SDL.SDLK_UP => io.keyinput.up.set(),
SDL.SDLK_DOWN => io.keyinput.down.set(),
SDL.SDLK_LEFT => io.keyinput.left.set(),
SDL.SDLK_RIGHT => io.keyinput.right.set(),
SDL.SDLK_x => io.keyinput.a.set(),
SDL.SDLK_z => io.keyinput.b.set(),
SDL.SDLK_a => io.keyinput.shoulder_l.set(),
SDL.SDLK_s => io.keyinput.shoulder_r.set(),
SDL.SDLK_RETURN => io.keyinput.start.set(),
SDL.SDLK_RSHIFT => io.keyinput.select.set(),
SDL.SDLK_i => log.err("Sample Count: {}", .{@intCast(u32, SDL.SDL_AudioStreamAvailable(cpu.bus.apu.stream)) / (2 * @sizeOf(u16))}),
SDL.SDLK_j => log.err("Scheduler Capacity: {} | Scheduler Event Count: {}", .{ scheduler.queue.capacity(), scheduler.queue.count() }),
SDL.SDLK_k => {
// Dump IWRAM to file
log.info("PC: 0x{X:0>8}", .{cpu.r[15]});
log.info("LR: 0x{X:0>8}", .{cpu.r[14]});
// const iwram_file = try std.fs.cwd().createFile("iwram.bin", .{});
// defer iwram_file.close();
// try iwram_file.writeAll(cpu.bus.iwram.buf);
},
else => {},
}
},
else => {},
}
try gui.run(&arm7tdmi, &scheduler);
}
// Emulator has an internal Double Buffer
const buf_ptr = cpu.bus.ppu.framebuf.get(.Renderer).ptr;
_ = SDL.SDL_UpdateTexture(texture, null, buf_ptr, framebuf_pitch);
_ = SDL.SDL_RenderCopy(renderer, texture, null, null);
SDL.SDL_RenderPresent(renderer);
const dyn_title = std.fmt.bufPrint(&dyn_title_buf, "{s} [Emu: {}fps] ", .{ window_title, emu_rate.value() }) catch unreachable;
SDL.SDL_SetWindowTitle(window, dyn_title.ptr);
}
quit.store(true, .SeqCst); // Terminate Emulator Thread
}
const CliError = error{
InsufficientOptions,
UnneededOptions,
};
fn sdlPanic() noreturn {
const str = @as(?[*:0]const u8, SDL.SDL_GetError()) orelse "unknown error";
@panic(std.mem.sliceTo(str, 0));
}
fn initSdl2() void {
const status = SDL.SDL_Init(SDL.SDL_INIT_VIDEO | SDL.SDL_INIT_EVENTS | SDL.SDL_INIT_AUDIO | SDL.SDL_INIT_GAMECONTROLLER);
if (status < 0) sdlPanic();
}
fn createWindow(title: []u8, width: c_int, height: c_int) *SDL.SDL_Window {
return SDL.SDL_CreateWindow(
title.ptr,
SDL.SDL_WINDOWPOS_CENTERED,
SDL.SDL_WINDOWPOS_CENTERED,
width * window_scale,
height * window_scale,
SDL.SDL_WINDOW_SHOWN,
) orelse sdlPanic();
}
fn createRenderer(window: *SDL.SDL_Window) *SDL.SDL_Renderer {
return SDL.SDL_CreateRenderer(window, -1, SDL.SDL_RENDERER_ACCELERATED | SDL.SDL_RENDERER_PRESENTVSYNC) orelse sdlPanic();
}
fn createTexture(renderer: *SDL.SDL_Renderer, width: c_int, height: c_int) *SDL.SDL_Texture {
return SDL.SDL_CreateTexture(
renderer,
SDL.SDL_PIXELFORMAT_RGBA8888,
SDL.SDL_TEXTUREACCESS_STREAMING,
width,
height,
) orelse sdlPanic();
}
fn initAudio(apu: *Apu) SDL.SDL_AudioDeviceID {
var have: SDL.SDL_AudioSpec = undefined;
var want: SDL.SDL_AudioSpec = .{
.freq = sample_rate,
.format = SDL.AUDIO_U16,
.channels = 2,
.samples = 0x100,
.callback = audioCallback,
.userdata = apu,
.silence = undefined,
.size = undefined,
.padding = undefined,
};
const dev = SDL.SDL_OpenAudioDevice(null, 0, &want, &have, 0);
if (dev == 0) sdlPanic();
// Start Playback on the Audio device
SDL.SDL_PauseAudioDevice(dev, 0);
return dev;
}
export fn audioCallback(userdata: ?*anyopaque, stream: [*c]u8, len: c_int) void {
const apu = @ptrCast(*Apu, @alignCast(8, userdata));
const written = SDL.SDL_AudioStreamGet(apu.stream, stream, len);
// If we don't write anything, play silence otherwise garbage will be played
// FIXME: I don't think this hack to remove DC Offset is acceptable :thinking:
if (written == 0) std.mem.set(u8, stream[0..@intCast(usize, len)], 0x40);
}
fn getSavePath(alloc: std.mem.Allocator) !?[]const u8 {
fn getSavePath(allocator: Allocator) !?[]const u8 {
const save_subpath = "zba" ++ [_]u8{std.fs.path.sep} ++ "save";
const maybe_data_path = try known_folders.getPath(alloc, .data);
defer if (maybe_data_path) |path| alloc.free(path);
const maybe_data_path = try known_folders.getPath(allocator, .data);
defer if (maybe_data_path) |path| allocator.free(path);
const save_path = if (maybe_data_path) |base| try std.fs.path.join(alloc, &[_][]const u8{ base, "zba", "save" }) else null;
const save_path = if (maybe_data_path) |base| try std.fs.path.join(allocator, &[_][]const u8{ base, "zba", "save" }) else null;
if (save_path) |_| {
// If we've determined what our save path should be, ensure the prereq directories
// are present so that we can successfully write to the path when necessary
const maybe_data_dir = try known_folders.open(alloc, .data, .{});
const maybe_data_dir = try known_folders.open(allocator, .data, .{});
if (maybe_data_dir) |data_dir| try data_dir.makePath(save_subpath);
}
return save_path;
}
fn getRomPath(res: clap.Result(clap.Help, &params, clap.parsers.default), stderr: std.fs.File) ![]const u8 {
return switch (res.positionals.len) {
1 => res.positionals[0],
0 => {
try stderr.writeAll("ZBA requires a positional path to a GamePak ROM.\n");
return CliError.InsufficientOptions;
},
else => {
try stderr.writeAll("ZBA received too many arguments.\n");
return CliError.UnneededOptions;
},
fn getRomPath(result: *const clap.Result(clap.Help, &params, clap.parsers.default)) ![]const u8 {
return switch (result.positionals.len) {
1 => result.positionals[0],
0 => std.debug.panic("ZBA requires a positional path to a GamePak ROM.\n", .{}),
else => std.debug.panic("ZBA received too many arguments.\n", .{}),
};
}
pub fn handleArguments(allocator: Allocator, result: *const clap.Result(clap.Help, &params, clap.parsers.default)) !FilePaths {
const rom_path = try getRomPath(result);
log.info("ROM path: {s}", .{rom_path});
const bios_path = result.args.bios;
if (bios_path) |path| log.info("BIOS path: {s}", .{path}) else log.info("No BIOS provided", .{});
const save_path = try getSavePath(allocator);
if (save_path) |path| log.info("Save path: {s}", .{path});
return FilePaths{
.rom = rom_path,
.bios = bios_path,
.save = save_path,
};
}