savestate option for vst

gb-vst/Cargo.toml

@@ -7,8 +7,9 @@ edition = "2021"
 name = "vst"
 crate-type = ["cdylib", "rlib"]
 
-
-# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+[features]
+default = []
+savestate = []
 
 [dependencies]
 gb-emu-lib = { path = "../lib", features = ["async"] }

gb-vst/src/lib.rs

@@ -1,27 +1,31 @@
 use async_ringbuf::AsyncHeapConsumer;
 use futures::executor;
 use gb_emu_lib::{
-    connect::{
-        AudioOutput, CpuSaveState, DownsampleType, EmulatorMessage, JoypadButtons, RomFile,
-        SerialTarget,
-    },
+    connect::{AudioOutput, DownsampleType, EmulatorMessage, JoypadButtons, RomFile, SerialTarget},
     EmulatorCore,
 };
+use nih_plug::midi::MidiResult::Basic;
 use nih_plug::prelude::*;
-use nih_plug::{midi::MidiResult::Basic, params::persist::PersistentField};
 use std::sync::{
     mpsc::{self, channel, Receiver, Sender},
     Arc, Mutex,
 };
 use ui::{Emulator, EmulatorRenderer};
 
+#[cfg(feature = "savestate")]
+use gb_emu_lib::connect::CpuSaveState;
+#[cfg(feature = "savestate")]
+use nih_plug::params::persist::PersistentField;
+
 mod ui;
 
+#[cfg(feature = "savestate")]
 #[derive(Default)]
 struct SaveStateParam {
     state: Arc<Mutex<Option<CpuSaveState<[u8; 4]>>>>,
 }
 
+#[cfg(feature = "savestate")]
 impl PersistentField<'_, Option<CpuSaveState<[u8; 4]>>> for SaveStateParam {
     fn set(&self, new_value: Option<CpuSaveState<[u8; 4]>>) {
         *self.state.lock().unwrap() = new_value;
@@ -37,6 +41,7 @@ impl PersistentField<'_, Option<CpuSaveState<[u8; 4]>>> for SaveStateParam {
 
 #[derive(Params, Default)]
 struct EmuParams {
+    #[cfg(feature = "savestate")]
     #[persist = "save_state"]
     last_save_state: SaveStateParam,
 }
@@ -252,6 +257,7 @@ impl Plugin for GameboyEmu {
                 tx: None,
             };
 
+            #[cfg(feature = "savestate")]
             let mut emulator_core = if let Some(state) =
                 self.params.last_save_state.state.lock().unwrap().take()
             {
@@ -264,6 +270,16 @@ impl Plugin for GameboyEmu {
 
                 EmulatorCore::init(receiver, options, window, output, None)
             };
+            #[cfg(not(feature = "savestate"))]
+            let mut emulator_core = {
+                let options = gb_emu_lib::Options::new(rom)
+                    .with_bootrom(bootrom)
+                    .with_serial_target(serial_target)
+                    .force_no_save();
+
+                EmulatorCore::init(receiver, options, window, output, None)
+            };
+
             emulator_core.run_until_buffer_full();
 
             self.vars = Some(EmuVars {
@@ -292,6 +308,7 @@ impl Plugin for GameboyEmu {
 
 impl GameboyEmu {
     fn update_save_state(&mut self) {
+        #[cfg(feature = "savestate")]
         if let Some(ref mut vars) = self.vars {
             *self.params.last_save_state.state.lock().unwrap() =
                 Some(vars.emulator_core.get_save_state());