Migrate `set_frame_rate` into the core `AudioBackend` trait

core/src/backend/audio.rs

@@ -76,6 +76,13 @@ pub trait AudioBackend {
         true
     }
     fn tick(&mut self) {}
+
+    /// Inform the audio backend of the current stage frame rate.
+    ///
+    /// This is only necessary if your particular audio backend needs to know
+    /// what the stage frame rate is. Otherwise, you are free to avoid
+    /// implementing it.
+    fn set_frame_rate(&mut self, frame_rate: f64) {}
 }
 
 /// Rust does not auto-impl a Trait for Box<Trait> or Deref<Target=Trait>

web/src/audio.rs

@@ -123,10 +123,6 @@ impl WebAudioBackend {
         })
     }
 
-    pub fn set_frame_rate(&mut self, frame_rate: f64) {
-        self.frame_rate = frame_rate
-    }
-
     fn start_sound_internal(
         &mut self,
         handle: SoundHandle,
@@ -542,6 +538,10 @@ impl WebAudioBackend {
 }
 
 impl AudioBackend for WebAudioBackend {
+    fn set_frame_rate(&mut self, frame_rate: f64) {
+        self.frame_rate = frame_rate
+    }
+
     fn register_sound(&mut self, sound: &swf::Sound) -> Result<SoundHandle, Error> {
         // Slice off latency seek for MP3 data.
         let (skip_sample_frames, data) = if sound.format.compression == AudioCompression::Mp3 {

web/src/lib.rs

@@ -11,7 +11,7 @@ use crate::{
 };
 use generational_arena::{Arena, Index};
 use js_sys::Uint8Array;
-use ruffle_core::{backend::render::RenderBackend, PlayerEvent};
+use ruffle_core::{backend::audio::AudioBackend, backend::render::RenderBackend, PlayerEvent};
 use std::{cell::RefCell, error::Error, num::NonZeroI32};
 use wasm_bindgen::{prelude::*, JsCast, JsValue};
 use web_sys::{Element, EventTarget, HtmlCanvasElement, KeyboardEvent, PointerEvent};