1 files changed, 78 insertions, 0 deletions
diff --git a/testing/web-platform/tests/webaudio/the-audio-api/the-audiobuffersourcenode-interface/audiobuffersource-multi-channels.html b/testing/web-platform/tests/webaudio/the-audio-api/the-audiobuffersourcenode-interface/audiobuffersource-multi-channels.html
new file mode 100644
index 0000000000..4e0de21e96
--- /dev/null
+++ b/testing/web-platform/tests/webaudio/the-audio-api/the-audiobuffersourcenode-interface/audiobuffersource-multi-channels.html
@@ -0,0 +1,78 @@
+<!DOCTYPE html>
+<!--
+Test AudioBufferSourceNode supports 5.1 channel.
+-->
+<html>
+  <head>
+    <title>
+      audiobuffersource-multi-channels.html
+    </title>
+    <script src="/resources/testharness.js"></script>
+    <script src="/resources/testharnessreport.js"></script>
+    <script src="/webaudio/resources/audit-util.js"></script>
+    <script src="/webaudio/resources/audit.js"></script>
+    <script src="/webaudio/resources/mix-testing.js"></script>
+  </head>
+  <body>
+    <script id="layout-test-code">
+      let audit = Audit.createTaskRunner();
+      let context;
+      let expectedAudio;
+
+      audit.define('initialize', (task, should) => {
+        // Create offline audio context
+        let sampleRate = 44100.0;
+        should(() => {
+          context = new OfflineAudioContext(
+              6, sampleRate * toneLengthSeconds, sampleRate);
+        }, 'Creating context for testing').notThrow();
+        should(
+          Audit
+            .loadFileFromUrl('resources/audiobuffersource-multi-channels-expected.wav')
+            .then(arrayBuffer => {
+              context.decodeAudioData(arrayBuffer).then(audioBuffer => {
+                expectedAudio = audioBuffer;
+                task.done();
+              }).catch(error => {
+                assert_unreached("Could not decode audio data due to " + error.message);
+              })
+            })
+          , 'Fetching expected audio').beResolved();
+      });
+
+      audit.define(
+          {label: 'test', description: 'AudioBufferSource with 5.1 buffer'},
+          (task, should) => {
+            let toneBuffer =
+                createToneBuffer(context, 440, toneLengthSeconds, 6);
+
+            let source = context.createBufferSource();
+            source.buffer = toneBuffer;
+
+            source.connect(context.destination);
+            source.start(0);
+
+            context.startRendering()
+                .then(renderedAudio => {
+                  // Compute a threshold based on the maximum error, |maxUlp|,
+                  // in ULP. This is experimentally determined. Assuming that
+                  // the reference file is a 16-bit wav file, the max values in
+                  // the wave file are +/- 32768.
+                  let maxUlp = 1;
+                  let threshold = maxUlp / 32768;
+                  for (let k = 0; k < renderedAudio.numberOfChannels; ++k) {
+                    should(
+                        renderedAudio.getChannelData(k),
+                        'Rendered audio for channel ' + k)
+                        .beCloseToArray(
+                            expectedAudio.getChannelData(k),
+                            {absoluteThreshold: threshold});
+                  }
+                })
+                .then(() => task.done());
+          });
+
+      audit.run();
+    </script>
+  </body>
+</html>