fix incorrect early uses of get_system_av_info (pre-load_game it is not valid)

ferretro_components/examples/multifunction_emulator.rs

@@ -41,7 +41,9 @@ pub fn main() -> Result<(), Box<dyn std::error::Error>> {
 
     let mut sdl_context = sdl2::init()?;
 
-    emu.register_component(StderrLogComponent { prefix: "{log} ".to_string() })?;
+    let mut stderr_log = StderrLogComponent::default();
+    stderr_log.prefix = "{log} ".to_string();
+    emu.register_component(stderr_log)?;
 
     // must register before opengl so it can have priority in queries about what N64 plugin to use
     // (only supports software-rendered 2D frames currently)
@@ -60,8 +62,7 @@ pub fn main() -> Result<(), Box<dyn std::error::Error>> {
 
     emu.register_component(SimpleSdl2GamepadComponent::new(&mut sdl_context))?;
 
-    let sleep_fps = SleepFramerateLimitComponent::new(emu.libretro_core());
-    emu.register_component(sleep_fps)?;
+    emu.register_component(SleepFramerateLimitComponent::new())?;
 
     emu.register_component(PathBufComponent {
         sys_path: opt.system.clone(),

ferretro_components/src/provided/sdl2/audio.rs

@@ -54,25 +54,28 @@ impl RetroCallbacks for SimpleSdl2AudioComponent {
 }
 
 impl RetroComponent for SimpleSdl2AudioComponent {
-    fn post_load_game(&mut self, _retro: &mut LibretroWrapper, _rom: &Path) -> Result<(), Box<dyn Error>> {
+    fn post_load_game(&mut self, retro: &mut LibretroWrapper, _rom: &Path) -> Result<(), Box<dyn Error>> {
+        self.src_freq = retro.get_system_av_info().timing.sample_rate;
         self.queue.resume();
         Ok(())
     }
 
     fn post_run(&mut self, _retro: &mut LibretroWrapper) -> ControlFlow {
         if let Ok(converter) = Self::make_converter(self.src_freq, self.queue.spec()) {
-            let mut samples = std::mem::take(&mut self.audio_buffer);
-            samples = resample(&converter, samples);
-            self.audio_buffer = samples;
-            self.queue.queue(&self.audio_buffer);
-            self.audio_buffer.clear();
+            if !self.audio_buffer.is_empty() {
+                let mut samples = std::mem::take(&mut self.audio_buffer);
+                samples = resample(&converter, samples);
+                self.audio_buffer = samples;
+                self.queue.queue(&self.audio_buffer);
+                self.audio_buffer.clear();
+            }
         }
         ControlFlow::Continue
     }
 }
 
 impl SimpleSdl2AudioComponent {
-    pub fn new(sdl_context: &mut Sdl, retro: &LibretroWrapper) -> Result<Self, Box<dyn std::error::Error>> {
+    pub fn new(sdl_context: &mut Sdl, _retro: &LibretroWrapper) -> Result<Self, Box<dyn std::error::Error>> {
         let audio = sdl_context.audio().unwrap();
         let desired_spec = AudioSpecDesired {
             freq: None,
@@ -82,12 +85,8 @@ impl SimpleSdl2AudioComponent {
 
         let queue = AudioQueue::open_queue(&audio, None, &desired_spec)?;
 
-        let mut src_freq = retro.get_system_av_info().timing.sample_rate;
-        // HACK: some cores don't report this 'til we get an env call to set_system_av_info,
-        // so we can just default to the old libsnes default value.
-        if src_freq == 0.0 {
-            src_freq = 32040.5;
-        }
+        //  default to the old libsnes default value until after load_game or set_system_av_info.
+        let src_freq = 32040.5;
 
         Ok(SimpleSdl2AudioComponent {
             src_freq,

ferretro_components/src/provided/sdl2/opengl.rs

@@ -6,6 +6,7 @@ use std::os::raw::c_uint;
 use sdl2::Sdl;
 use sdl2::rect::Rect;
 use sdl2::render::WindowCanvas;
+use std::path::Path;
 
 /// Create a root window in SDL2 with an OpenGL context and attaches libretro's
 /// `hw_get_proc_address` calls to that of the [sdl2::VideoSubsystem].
@@ -34,12 +35,12 @@ impl SimpleSdl2OpenglComponent {
             unsafe { CStr::from_ptr(sys_info.library_name) }.to_string_lossy()
         );
 
-        let geometry = retro.get_system_av_info().geometry;
         let pixel_format = sdl2::pixels::PixelFormatEnum::ARGB1555;
 
         let video = sdl_context.video()?;
+        // default to old libsnes 256x224 window size until load_game (prereq of get_system_av_info)
         let window = video
-            .window(title.as_str(), geometry.base_width, geometry.base_height)
+            .window(title.as_str(), 256, 224)
             .opengl()
             .build()?;
 
@@ -90,7 +91,13 @@ impl SimpleSdl2OpenglComponent {
     }
 }
 
-impl RetroComponent for SimpleSdl2OpenglComponent {}
+impl RetroComponent for SimpleSdl2OpenglComponent {
+    fn post_load_game(&mut self, retro: &mut LibretroWrapper, _rom: &Path) -> crate::base::Result<()> {
+        self.set_geometry(&retro.get_system_av_info().geometry);
+        Ok(())
+    }
+}
+
 impl RetroCallbacks for SimpleSdl2OpenglComponent {
     fn video_refresh(&mut self, frame: &VideoFrame) {
         match frame {

ferretro_components/src/provided/stdlib/fps.rs

@@ -2,6 +2,7 @@ use crate::base::ControlFlow;
 use crate::prelude::*;
 
 use std::time::{Duration, Instant};
+use std::path::Path;
 
 /// Uses [std::thread::sleep] to maintain the target FPS specified by the core.
 ///
@@ -14,6 +15,10 @@ pub struct SleepFramerateLimitComponent {
 }
 
 impl RetroComponent for SleepFramerateLimitComponent {
+    fn post_load_game(&mut self, retro: &mut LibretroWrapper, _rom: &Path) -> crate::base::Result<()> {
+        self.fps = retro.get_system_av_info().timing.fps;
+        Ok(())
+    }
     fn pre_run(&mut self, _retro: &mut LibretroWrapper) -> ControlFlow {
         self.did_sleep = false;
         ControlFlow::Continue
@@ -38,11 +43,11 @@ impl RetroCallbacks for SleepFramerateLimitComponent {
 }
 
 impl SleepFramerateLimitComponent {
-    pub fn new(retro: &mut LibretroWrapper) -> Self {
+    pub fn new() -> Self {
         SleepFramerateLimitComponent {
             did_sleep: false,
             started_video: false,
-            fps: retro.get_system_av_info().timing.fps,
+            fps: 60.0, // default until load_game
             frame_begin: Instant::now(),
         }
     }

ferretro_components/src/provided/stdlib/logs.rs

@@ -6,17 +6,29 @@ use std::os::raw::c_uint;
 use std::path::PathBuf;
 
 /// Write's the core's own log statements to stderr.
-#[derive(Default)]
 pub struct StderrLogComponent {
     /// May be set to add a prefix to each logged line.
     pub prefix: String,
+    /// The most verbose log level that should be printed.
+    pub level: ferretro_base::retro::ffi::LogLevel,
+}
+
+impl Default for StderrLogComponent {
+    fn default() -> Self {
+        StderrLogComponent {
+            prefix: String::new(),
+            level: ferretro_base::retro::ffi::LogLevel::Info,
+        }
+    }
 }
 
 impl RetroComponent for StderrLogComponent {}
 
 impl RetroCallbacks for StderrLogComponent {
     fn log_print(&mut self, level: ferretro_base::retro::ffi::LogLevel, msg: &str) {
-        eprint!("{}[{:?}] {}", self.prefix, level, msg);
+        if level >= self.level {
+            eprint!("{}[{:?}] {}", self.prefix, level, msg);
+        }
     }
 }