1 files changed, 34 insertions, 0 deletions
diff --git a/testing/web-platform/tests/webaudio/the-audio-api/the-audioworklet-interface/processors/add-offset.js b/testing/web-platform/tests/webaudio/the-audio-api/the-audioworklet-interface/processors/add-offset.js
new file mode 100644
index 0000000000..d05056bd84
--- /dev/null
+++ b/testing/web-platform/tests/webaudio/the-audio-api/the-audioworklet-interface/processors/add-offset.js
@@ -0,0 +1,34 @@
+/*
+ * @class AddOffsetProcessor
+ * @extends AudioWorkletProcessor
+ *
+ * Just adds a fixed value to the input
+ */
+class AddOffsetProcessor extends AudioWorkletProcessor {
+  constructor(options) {
+    super();
+
+    this._offset = options.processorOptions.offset;
+  }
+
+  process(inputs, outputs) {
+    // This processor assumes the node has at least 1 input and 1 output.
+    let input = inputs[0];
+    let output = outputs[0];
+    let outputChannel = output[0];
+
+    if (input.length > 0) {
+      let inputChannel = input[0];
+      for (let k = 0; k < outputChannel.length; ++k)
+        outputChannel[k] = inputChannel[k] + this._offset;
+    } else {
+      // No input connected, so pretend it's silence and just fill the
+      // output with the offset value.
+      outputChannel.fill(this._offset);
+    }
+
+    return true;
+  }
+}
+
+registerProcessor('add-offset-processor', AddOffsetProcessor);