| Index: LayoutTests/webaudio/audiobuffersource-loop-grain-no-duration.html
|
| diff --git a/LayoutTests/webaudio/audiobuffersource-loop-grain-no-duration.html b/LayoutTests/webaudio/audiobuffersource-loop-grain-no-duration.html
|
| new file mode 100644
|
| index 0000000000000000000000000000000000000000..47858dfccddb6325d70add16a359640c99004d3d
|
| --- /dev/null
|
| +++ b/LayoutTests/webaudio/audiobuffersource-loop-grain-no-duration.html
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| @@ -0,0 +1,79 @@
|
| +<!doctype html>
|
| +<html>
|
| + <head>
|
| + <title>Test AudioBufferSourceNode looping without explicit duration</title>
|
| + <script src="resources/compatibility.js"></script>
|
| + <script src="resources/audio-testing.js"></script>
|
| + <script src="../resources/js-test.js"></script>
|
| + </head>
|
| +
|
| + <body>
|
| + <script>
|
| + description("Test AudioBufferSourceNode looping without explicit duration");
|
| +
|
| + var context;
|
| + var buffer;
|
| + var output;
|
| + var expected;
|
| + var sampleRate = 44100;
|
| + var sourceFrames = 8;
|
| + // How many loops of the source we want to render. Any whole number greater than 1 will work.
|
| + var loopCount = 4;
|
| + var renderFrames = sourceFrames * loopCount;
|
| +
|
| +
|
| + function checkResult(renderedBuffer) {
|
| + var badIndex = -1;
|
| + var success = true;
|
| +
|
| + expected = buffer.getChannelData(0);
|
| + output = renderedBuffer.getChannelData(0);
|
| +
|
| + // Verify the output has the expected data. The actual output should be a loopCount copies
|
| + // of the source buffer.
|
| + for (var k = 0; k < loopCount; ++k) {
|
| + // Check that this current subset is a linear ramp matching the original source.
|
| + for (var n = 0; n < sourceFrames; ++n) {
|
| + if (expected[n] != output[n + k * sourceFrames]) {
|
| + // Remember the first bad sample and exit all loops now.
|
| + badIndex = n + k * sourceFrames;
|
| + success = false;
|
| + break;
|
| + }
|
| + }
|
| + if (!success)
|
| + break;
|
| + }
|
| +
|
| + if (success) {
|
| + testPassed("Source looped correctly");
|
| + } else {
|
| + testFailed("First incorrect sample at index " + badIndex);
|
| + }
|
| + }
|
| +
|
| + function runTest() {
|
| + window.jsTestIsAsync = true;
|
| +
|
| + // Create a short linear ramp and enable looping. The test will verify that the ramp was
|
| + // looped the appropriate number of times.
|
| + context = new OfflineAudioContext(1, renderFrames, sampleRate);
|
| + buffer = createLinearRampBuffer(context, sourceFrames);
|
| + var source = context.createBufferSource();
|
| + source.buffer = buffer;
|
| + source.connect(context.destination);
|
| +
|
| + // Loop the source, and start the source with an offset, but without a duration. In this
|
| + // case, the source should loop "forever". See crbug.com/457009. The case where the
|
| + // duration is given is covered in other tests.
|
| + source.loop = true;
|
| + source.start(0, 0);
|
| + context.startRendering()
|
| + .then(checkResult)
|
| + .then(finishJSTest);
|
| + }
|
| +
|
| + runTest();
|
| + </script>
|
| + </body>
|
| +</html>
|
|
|
Chromium Code Reviews
Issue 912803005:
Looping AudioBufferSourceNodes stop only if duration is explicitly given. (Closed)
Base URL: svn://svn.chromium.org/blink/trunk