desktop recording sorta works

gui/src/imp/web.rs

@@ -82,11 +82,8 @@ impl AudioSystem {
         // Create MediaStreams to playback decoded audio
         // The audio context is used to reproduce audio.
         let webctx = configure_audio_context();
-        let processor = AudioProcessorSender::default();
-        Ok(AudioSystem {
-            webctx,
-            processors: processor,
-        })
+        let processors = AudioProcessorSender::default();
+        Ok(AudioSystem { webctx, processors })
     }
 
     pub fn set_processor(&self, processor: AudioProcessor) {
@@ -210,7 +207,8 @@ fn process_audio(frame: &JsValue, processor: &mut AudioProcessor) {
         return;
     };
     let input = samples.to_vec();
-    let output = processor.process(&input);
+    let mut output = Vec::with_capacity(input.len());
+    processor.process(&input, &mut output);
     samples.copy_from(&output);
 }