Simplify AUDIO_WORKLET checks. NFC (#24164)

I assume the idea here was that there would be an AUDIO_WORKLET=2 mode
but that was never added.

Author: sbc100

site/source/docs/api_reference/wasm_audio_worklets.rst

@@ -165,7 +165,7 @@ which resumes the audio context when the user clicks on the DOM Canvas element t
     return true; // Keep the graph output going
   }
 
-And that's it! Compile the code with the linker flags ``-sAUDIO_WORKLET=1 -sWASM_WORKERS=1`` to enable targeting AudioWorklets.
+And that's it! Compile the code with the linker flags ``-sAUDIO_WORKLET -sWASM_WORKERS`` to enable targeting AudioWorklets.
 
 Synchronizing audio thread with the main thread
 ===============================================

src/audio_worklet.js

@@ -1,5 +1,5 @@
 // This file is the main bootstrap script for Wasm Audio Worklets loaded in an
-// Emscripten application.  Build with -sAUDIO_WORKLET=1 linker flag to enable
+// Emscripten application.  Build with -sAUDIO_WORKLET linker flag to enable
 // targeting Audio Worklets.
 
 // AudioWorkletGlobalScope does not have a onmessage/postMessage() functionality

src/settings_internal.js

@@ -137,9 +137,6 @@ var WASM_BINARY_FILE = '';
 // name of the file containing the Wasm Worker *.ww.js, if relevant
 var WASM_WORKER_FILE = '';
 
-// name of the file containing the Audio Worklet *.aw.js, if relevant
-var AUDIO_WORKLET_FILE = '';
-
 // Base URL the source mapfile, if relevant
 var SOURCE_MAP_BASE = '';
 

tools/link.py

@@ -1421,8 +1421,6 @@ def limit_incoming_module_api():
   default_setting('WASM_BIGINT', feature_matrix.caniuse(feature_matrix.Feature.JS_BIGINT_INTEGRATION))
 
   if settings.AUDIO_WORKLET:
-    if settings.AUDIO_WORKLET == 1:
-      settings.AUDIO_WORKLET_FILE = unsuffixed(os.path.basename(target)) + '.aw.js'
     add_system_js_lib('libwebaudio.js')
     if not settings.MINIMAL_RUNTIME:
       # If we are in the audio worklet environment, we can only access the Module object
@@ -2178,8 +2176,9 @@ def phase_final_emitting(options, target, js_target, wasm_target):
     create_worker_file('src/wasm_worker.js', target_dir, settings.WASM_WORKER_FILE, options)
 
   # Deploy the Audio Worklet module bootstrap file (*.aw.js)
-  if settings.AUDIO_WORKLET == 1:
-    create_worker_file('src/audio_worklet.js', target_dir, settings.AUDIO_WORKLET_FILE, options)
+  if settings.AUDIO_WORKLET:
+    audio_worklet_file = unsuffixed_basename(js_target) + '.aw.js'
+    create_worker_file('src/audio_worklet.js', target_dir, audio_worklet_file, options)
 
   if settings.MODULARIZE and settings.MODULARIZE != 'instance':
     modularize()