| Index: third_party/WebKit/LayoutTests/webaudio/waveshaper-copy-curve.html
|
| diff --git a/third_party/WebKit/LayoutTests/webaudio/waveshaper-copy-curve.html b/third_party/WebKit/LayoutTests/webaudio/waveshaper-copy-curve.html
|
| new file mode 100644
|
| index 0000000000000000000000000000000000000000..5ebed9d009e9ef4cb01e0452a314d542de5a1e5d
|
| --- /dev/null
|
| +++ b/third_party/WebKit/LayoutTests/webaudio/waveshaper-copy-curve.html
|
| @@ -0,0 +1,87 @@
|
| +<!doctype html>
|
| +<html>
|
| + <head>
|
| + <title>Test WaveShaper Copies Curve Data</title>
|
| + <script src="../resources/testharness.js"></script>
|
| + <script src="../resources/testharnessreport.js"></script>
|
| + <script src="resources/audio-testing.js"></script>
|
| + </head>
|
| +
|
| + <body>
|
| + <script>
|
| + // Sample rate and number of frames are fairly arbitrary. We need to
|
| + // render, however, at least 384 frames. 1024 is a nice small value.
|
| + var sampleRate = 16000;
|
| + var renderFrames = 1024;
|
| +
|
| + var audit = Audit.createTaskRunner();
|
| +
|
| + audit.defineTask("test copying", function (taskDone) {
|
| + // Two-channel context; channel 0 contains the test data and channel 1
|
| + // contains the expected result. Channel 1 has the normal WaveShaper
|
| + // output and channel 0 has the WaveShaper output with a modified curve.
|
| + var context = new OfflineAudioContext(2, renderFrames, sampleRate);
|
| +
|
| + // Just use a default oscillator as the source. Doesn't really matter
|
| + // what we use.
|
| + var src = context.createOscillator();
|
| + src.type = "sawtooth";
|
| +
|
| + // Create the wave shapers: ws0 is the test shaper, and ws1 is the
|
| + // reference wave shaper.
|
| + var ws0 = context.createWaveShaper();
|
| + var ws1 = context.createWaveShaper();
|
| +
|
| + // Wave shaper curves. Doesn't really matter what we use as long as it
|
| + // modifies the input in some way. Thus, keep it simple and just invert
|
| + // the input.
|
| + var desiredCurve = [1, 0, -1];
|
| + var curve0 = Float32Array.from(desiredCurve);
|
| + var curve1 = Float32Array.from(desiredCurve);
|
| +
|
| + ws0.curve = curve0;
|
| + ws1.curve = curve1;
|
| +
|
| + var merger = context.createChannelMerger(2);
|
| +
|
| + // Connect the graph
|
| + src.connect(ws0);
|
| + src.connect(ws1);
|
| +
|
| + ws0.connect(merger, 0, 0);
|
| + ws1.connect(merger, 0, 1);
|
| +
|
| + merger.connect(context.destination);
|
| +
|
| + // Let the context run for a bit and then modify the curve for ws0.
|
| + // Doesn't really matter what we modify the curve to as long as it's
|
| + // different.
|
| + context.suspend(256 / context.sampleRate)
|
| + .then(function () {
|
| + curve0[0] = -0.5;
|
| + curve0[1] = 0.125;
|
| + curve0[2] = 0.75;
|
| + })
|
| + .then(context.resume.bind(context));
|
| +
|
| + src.start();
|
| +
|
| + context.startRendering().then(function (renderedBuffer) {
|
| + var actual = renderedBuffer.getChannelData(0);
|
| + var expected = renderedBuffer.getChannelData(1);
|
| +
|
| + // Modifying the wave shaper curve should not modify the output so the
|
| + // outputs from the two wave shaper nodes should be exactly identical.
|
| + var success = Should("WaveShaper with modified curve", actual)
|
| + .beEqualToArray(expected);
|
| +
|
| + Should("Summary: ", success).summarize(
|
| + "Output correctly did not change with modified WaveShaper curve.",
|
| + "Output incorrectly changed due to modified WaveShaper curve.");
|
| + }).then(taskDone);
|
| + });
|
| +
|
| + audit.runTasks();
|
| + </script>
|
| + </body>
|
| +</html>
|
|
|
Chromium Code Reviews
Issue 2223613002:
WaveShaperNode should copy its curve. (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@master