From 772410730ddb200a034585c86c416e07d16b033a Mon Sep 17 00:00:00 2001 From: Vivian Lim Date: Mon, 23 Dec 2019 17:52:01 -0800 Subject: [PATCH] initial commit --- .gitignore | 2 + Cargo.lock | 618 ++++++++++++++++++++++++++++++++++++++ Cargo.toml | 19 ++ examples/sdl2_emulator.rs | 474 +++++++++++++++++++++++++++++ src/lib.rs | 3 + src/sync/mod.rs | 1 + src/sync/pokemon_rb.rs | 13 + 7 files changed, 1130 insertions(+) create mode 100644 .gitignore create mode 100644 Cargo.lock create mode 100644 Cargo.toml create mode 100644 examples/sdl2_emulator.rs create mode 100644 src/lib.rs create mode 100644 src/sync/mod.rs create mode 100644 src/sync/pokemon_rb.rs diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..53eaa21 --- /dev/null +++ b/.gitignore @@ -0,0 +1,2 @@ +/target +**/*.rs.bk diff --git a/Cargo.lock b/Cargo.lock new file mode 100644 index 0000000..e206393 --- /dev/null +++ b/Cargo.lock @@ -0,0 +1,618 @@ +# This file is automatically @generated by Cargo. +# It 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"] +edition = "2018" + +[build-dependencies] +cc = "^1" + +[dependencies] +ferretro = { path = "../rustro-2" } +failure = "^0.1" +libloading = "^0.5" + +[dev-dependencies] +# example: sdl2_emulator +sdl2 = "^0.32" +crossbeam-channel = "^0.4" +structopt = "^0.3" \ No newline at end of file diff --git a/examples/sdl2_emulator.rs b/examples/sdl2_emulator.rs new file mode 100644 index 0000000..d00ef06 --- /dev/null +++ b/examples/sdl2_emulator.rs @@ -0,0 +1,474 @@ +extern crate crossbeam_channel; +extern crate ferretro; +extern crate sdl2; + +use ferretro::retro; +use ferretro::retro::ffi::{GameGeometry, SystemInfo, SystemAvInfo, MemoryMap}; +use ferretro::retro::constants::{InputIndex, JoypadButton, AnalogAxis, DeviceType}; +use ferretro::retro::wrapped_types::{ControllerDescription2, InputDescriptor2, InputDeviceId, SubsystemInfo2, Variable2}; +use ferretro::retro::wrapper::LibretroWrapper; + +use std::ffi::CStr; +use std::io::Read; +use std::path::{Path, PathBuf}; +use std::pin::Pin; +use std::time::{Duration, Instant}; + +use structopt::StructOpt; + +use sdl2::audio::{AudioCallback, AudioFormat, AudioSpec, AudioSpecDesired, AudioDevice}; +use sdl2::controller::{GameController, Button, Axis}; +use sdl2::event::Event; +use sdl2::keyboard::Keycode; +use sdl2::rect::Rect; +use sdl2::render::WindowCanvas; + +struct MyEmulator { + retro: retro::wrapper::LibretroWrapper, + core_path: PathBuf, + sys_path: Option, + + preferred_pad: Option, + + sys_info: SystemInfo, + av_info: SystemAvInfo, + + sdl_context: sdl2::Sdl, + + // video bits + canvas: WindowCanvas, + pixel_format: sdl2::pixels::PixelFormatEnum, + + // audio bits + audio_buffer: Vec, + audio_spec: AudioSpec, + audio_device: AudioDevice, + audio_sender: crossbeam_channel::Sender>, + + // input bits + gamepad_subsys: sdl2::GameControllerSubsystem, + gamepads: Vec, + pressed_keys: Vec, +} + +impl MyEmulator { + pub fn new(core_path: impl AsRef, sys_path: &Option>) -> Pin> { + let core_path = PathBuf::from(core_path.as_ref()); + let lib = libloading::Library::new(&core_path).unwrap(); + let raw_retro = retro::loading::LibretroApi::from_library(lib).unwrap(); + let retro = retro::wrapper::LibretroWrapper::from(raw_retro); + + let sys_info = retro.get_system_info(); + let title = format!( + "{} - rust libretro", + unsafe { CStr::from_ptr(sys_info.library_name) }.to_string_lossy() + ); + + let mut av_info = retro.get_system_av_info(); + let pixel_format = sdl2::pixels::PixelFormatEnum::ARGB1555; + + // HACK: some cores don't report this 'til we get an environ call to set_system_av_info... + // which is too late for this constructor to pass along to SDL. + if av_info.timing.sample_rate == 0.0 { + av_info.timing.sample_rate = 32040.0; + } + + let sdl_context = sdl2::init().unwrap(); + + let window = sdl_context + .video() + .unwrap() + .window(title.as_str(), av_info.geometry.base_width, av_info.geometry.base_height) + .opengl() + .build() + .unwrap(); + + let canvas = window.into_canvas().build().unwrap(); + + let (audio_sender, audio_receiver) = crossbeam_channel::bounded(2); + + let audio = sdl_context.audio().unwrap(); + let desired_spec = AudioSpecDesired { + freq: Some(av_info.timing.sample_rate.round() as i32), + channels: Some(2), + samples: None, + }; + let mut audio_spec = None; + let audio_device = audio + .open_playback(None, &desired_spec, |spec| { + if spec.format != AudioFormat::S16LSB { + println!("unsupported audio format {:?}", spec.format); + } + audio_spec = Some(spec.clone()); + MySdlAudio { + audio_spec: spec, + audio_receiver, + } + }) + .unwrap(); + + let gamepad_subsys = sdl_context.game_controller().unwrap(); + let mut gamepads = Vec::new(); + for i in 0..gamepad_subsys.num_joysticks().unwrap() { + gamepads.extend(gamepad_subsys.open(i).into_iter()); + } + + let pressed_keys = Vec::new(); + + let emu = MyEmulator { + retro, + core_path, + sys_path: sys_path.as_ref().map(|p| p.as_ref().to_path_buf()), + preferred_pad: None, + av_info, + sys_info, + sdl_context, + canvas, + pixel_format, + audio_buffer: Default::default(), + audio_spec: audio_spec.unwrap(), + audio_device, + audio_sender, + gamepad_subsys, + gamepads, + pressed_keys, + }; + let mut pin_emu = Box::pin(emu); + retro::wrapper::set_handler(pin_emu.as_mut()); + pin_emu.retro.init(); + pin_emu + } + + pub fn run(&mut self) { + self.audio_device.resume(); + let mut event_pump = self.sdl_context.event_pump().unwrap(); + 'running: loop { + let frame_begin = Instant::now(); + + for event in event_pump.poll_iter() { + match event { + Event::Quit { .. } + | Event::KeyDown { + keycode: Some(Keycode::Escape), + .. + } => break 'running, + _ => {} + } + } + + self.update_key_state(&event_pump.keyboard_state()); + + // The rest of the game loop goes here... + self.retro.run(); + self.canvas.present(); + + // similar hack to the sample rate, make sure we don't divide by zero. + let mut spf = 1.0 / self.av_info.timing.fps; + if spf.is_nan() { + spf = 1.0 / 60.0; + } + Duration::from_secs_f64(spf) + .checked_sub(frame_begin.elapsed()) + .map(std::thread::sleep); + } + } + + pub fn load_game(&self, rom: impl AsRef) { + let path = rom.as_ref(); + let mut data = None; + let mut v = Vec::new(); + if !self.sys_info.need_fullpath { + if let Ok(mut f) = std::fs::File::open(path) { + if f.read_to_end(&mut v).is_ok() { + data = Some(v.as_ref()); + } + } + } + self.retro + .load_game(Some(path), data, None) + .unwrap(); + if let Some(device) = self.preferred_pad { + for port in 0..self.gamepads.len() as u32 { + self.retro.set_controller_port_device(port, device); + } + } + } + + pub fn update_key_state<'a>(&mut self, keyboard_state: &sdl2::keyboard::KeyboardState<'a>){ + let keys: Vec = keyboard_state.pressed_scancodes().filter_map(Keycode::from_scancode).collect(); + self.pressed_keys = keys; + } + + fn send_audio_samples(&mut self) { + let stereo_samples = self.audio_spec.samples as usize * 2; + while self.audio_buffer.len() >= stereo_samples { + let remainder = self.audio_buffer.split_off(stereo_samples); + let msg = std::mem::replace(&mut self.audio_buffer, remainder); + let _ = self.audio_sender.try_send(msg); + } + } + + fn input_state_gamepad(&mut self, port: u32, device: &InputDeviceId, index: &InputIndex) -> i16 { + match self.gamepads.get(port as usize) { + Some(gamepad) => { + match device { + InputDeviceId::Joypad(button) => { + match button_map(&button) { + Some(x) => gamepad.button(x) as i16, + None => match button { + JoypadButton::L2 => gamepad.axis(Axis::TriggerLeft), + JoypadButton::R2 => gamepad.axis(Axis::TriggerRight), + _ => 0, + } + } + } + InputDeviceId::Analog(axis) => gamepad.axis(axis_map(index, axis)), + _ => 0, + } + } + None => 0, + } + } + + fn input_state_keyboard(&mut self, port: u32, device: &InputDeviceId, index: &InputIndex) -> i16 { + if port != 0 { // Keyboard only controls the first port. + return 0; + } + + match device { + InputDeviceId::Joypad(button) => { + match keyboard_map(&button) { + Some(x) => return if self.pressed_keys.contains(&x) {1} else {0}, + None => 0 + } + }, + _ => 0 + } + } +} + +impl Drop for MyEmulator { + fn drop(&mut self) { + retro::wrapper::unset_handler(); + } +} + +impl retro::wrapper::Handler for MyEmulator { + fn libretro_core(&mut self) -> &mut LibretroWrapper { + &mut self.retro + } + + fn video_refresh(&mut self, data: &[u8], width: u32, height: u32, pitch: u32) { + let rect = Rect::new(0, 0, width, height); + + if let Ok(mut tex) = + self.canvas + .texture_creator() + .create_texture_static(self.pixel_format, width, height) + { + if tex.update(rect, data, pitch as usize).is_ok() { + self.canvas.clear(); + self.canvas.copy(&tex, None, None).unwrap(); + } + } + } + + fn audio_sample(&mut self, left: i16, right: i16) { + self.audio_buffer.push(left); + self.audio_buffer.push(right); + self.send_audio_samples() + } + + fn audio_sample_batch(&mut self, stereo_pcm: &[i16]) -> usize { + self.audio_buffer.extend(stereo_pcm); + self.send_audio_samples(); + stereo_pcm.len() + } + + fn input_poll(&mut self) { + self.gamepad_subsys.update(); + } + + fn input_state(&mut self, port: u32, device: InputDeviceId, index: InputIndex) -> i16 { + let gamepad_state = self.input_state_gamepad(port, &device, &index); + if gamepad_state > 0 { + return gamepad_state; + } + + return self.input_state_keyboard(port, &device, &index); + } + + fn get_can_dupe(&mut self) -> Option { Some(true) } + + fn get_system_directory(&mut self) -> Option { + self.sys_path.clone() + } + + fn set_pixel_format(&mut self, pix_fmt: retro::ffi::PixelFormat) -> bool { + self.pixel_format = match pix_fmt { + retro::ffi::PixelFormat::ARGB1555 => sdl2::pixels::PixelFormatEnum::RGB555, + retro::ffi::PixelFormat::ARGB8888 => sdl2::pixels::PixelFormatEnum::ARGB8888, + retro::ffi::PixelFormat::RGB565 => sdl2::pixels::PixelFormatEnum::RGB565, + }; + true + } + fn get_variable(&mut self, key: &str) -> Option { + match key { + "beetle_saturn_analog_stick_deadzone" => Some("15%".to_string()), + "parallel-n64-gfxplugin" => Some("angrylion".to_string()), + "parallel-n64-astick-deadzone" => Some("15%".to_string()), + _ => None, + } + } + + fn set_variables(&mut self, variables: Vec) -> bool { + for v in variables { + eprintln!("{:?}", v); + } + true + } + + fn get_libretro_path(&mut self) -> Option { + Some(self.core_path.clone()) + } + + fn get_input_device_capabilities(&mut self) -> Option { + let bits = (1 << (DeviceType::Joypad as u32)) | (1 << (DeviceType::Analog as u32)); + Some(bits as u64) + } + + fn get_save_directory(&mut self) -> Option { + Some(std::env::temp_dir()) + } + + fn set_system_av_info(&mut self, av_info: SystemAvInfo) -> bool { + self.set_geometry(av_info.geometry.clone()); + self.av_info = av_info; + true + } + + fn set_subsystem_info(&mut self, subsystem_info: Vec) -> bool { + println!("subsystem info: {:?}", subsystem_info); + true + } + + fn set_controller_info(&mut self, controller_info: Vec) -> bool { + for ci in controller_info { + // so we can have analog support in beetle/mednafen saturn + if ci.name.as_str() == "3D Control Pad" { + self.preferred_pad = Some(ci.device_id()); + break; + } + } + true + } + + fn set_input_descriptors(&mut self, descriptors: Vec) -> bool { + for id in descriptors { + println!("{:?}", id); + } + true + } + + fn set_geometry(&mut self, geom: GameGeometry) -> bool { + let _ = self.canvas.window_mut().set_size(geom.base_width, geom.base_height); + let _ = self.canvas.set_logical_size(geom.base_width, geom.base_height); + self.av_info.geometry = geom; + true + } + + fn log_print(&mut self, level: retro::ffi::LogLevel, msg: &str) { + eprint!("[{:?}] {}", level, msg); + } +} + +struct MySdlAudio { + audio_spec: AudioSpec, + audio_receiver: crossbeam_channel::Receiver>, +} + +impl AudioCallback for MySdlAudio { + type Channel = i16; + + fn callback(&mut self, out: &mut [Self::Channel]) { + if self.audio_spec.format == AudioFormat::S16LSB { + if let Ok(samples) = self.audio_receiver.recv() { + out.copy_from_slice(&samples[..out.len()]); + } + } + } +} + +pub fn main() -> failure::Fallible<()> { + let opt: Opt = Opt::from_args(); + let mut emu = MyEmulator::new(&opt.core, &opt.system); + emu.load_game(&opt.rom); + emu.run(); + + Ok(()) +} + +#[derive(StructOpt)] +struct Opt { + /// Core module to use. + #[structopt(short, long, parse(from_os_str))] + core: PathBuf, + /// ROM to load using the core. + #[structopt(short, long, parse(from_os_str))] + rom: PathBuf, + /// System directory, often containing BIOS files + #[structopt(short, long, parse(from_os_str))] + system: Option, +} + +fn button_map(retro_button: &JoypadButton) -> Option