1 files changed, 30 insertions, 0 deletions
diff --git a/testing/web-platform/tests/webaudio/the-audio-api/the-audioworklet-interface/processors/param-size-processor.js b/testing/web-platform/tests/webaudio/the-audio-api/the-audioworklet-interface/processors/param-size-processor.js
new file mode 100644
index 0000000000..d7ce836500
--- /dev/null
+++ b/testing/web-platform/tests/webaudio/the-audio-api/the-audioworklet-interface/processors/param-size-processor.js
@@ -0,0 +1,30 @@
+/**
+ * @class ParamSizeProcessor
+ * @extends AudioWorkletProcessor
+ *
+ * This processor is a source node which basically outputs the size of the
+ * AudioParam array for each render quantum.
+ */
+
+class ParamSizeProcessor extends AudioWorkletProcessor {
+  static get parameterDescriptors() {
+    return [{name: 'param'}];
+  }
+
+  constructor() {
+    super();
+  }
+
+  process(inputs, outputs, parameters) {
+    let output = outputs[0];
+    let param = parameters.param;
+
+    for (let channel = 0; channel < output.length; ++channel) {
+      output[channel].fill(param.length);
+    }
+
+    return true;
+  }
+}
+
+registerProcessor('param-size', ParamSizeProcessor);