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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 17:32:43 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 17:32:43 +0000 |
commit | 6bf0a5cb5034a7e684dcc3500e841785237ce2dd (patch) | |
tree | a68f146d7fa01f0134297619fbe7e33db084e0aa /testing/web-platform/tests/webaudio/the-audio-api/the-gainnode-interface/no-dezippering.html | |
parent | Initial commit. (diff) | |
download | thunderbird-upstream.tar.xz thunderbird-upstream.zip |
Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'testing/web-platform/tests/webaudio/the-audio-api/the-gainnode-interface/no-dezippering.html')
-rw-r--r-- | testing/web-platform/tests/webaudio/the-audio-api/the-gainnode-interface/no-dezippering.html | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/testing/web-platform/tests/webaudio/the-audio-api/the-gainnode-interface/no-dezippering.html b/testing/web-platform/tests/webaudio/the-audio-api/the-gainnode-interface/no-dezippering.html new file mode 100644 index 0000000000..6326d00dfb --- /dev/null +++ b/testing/web-platform/tests/webaudio/the-audio-api/the-gainnode-interface/no-dezippering.html @@ -0,0 +1,121 @@ +<!DOCTYPE html> +<html> + <head> + <title> + Gain Dezippering Test: Dezippering Removed + </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> + </head> + <body> + <script id="layout-test-code"> + let audit = Audit.createTaskRunner(); + + audit.define( + {label: 'test0', description: 'Dezippering of GainNode removed'}, + (task, should) => { + // Only need a few frames to verify that dezippering has been + // removed from the GainNode. Sample rate is pretty arbitrary. + let context = new OfflineAudioContext(1, 1024, 16000); + + // Send a unit source to the gain node so we can measure the effect + // of the gain node. + let src = new ConstantSourceNode(context, {offset: 1}); + let g = new GainNode(context, {gain: 1}); + src.connect(g).connect(context.destination); + + context.suspend(RENDER_QUANTUM_FRAMES / context.sampleRate) + .then(() => { + g.gain.value = .5; + }) + .then(() => context.resume()); + + src.start(); + + context.startRendering() + .then(audio => { + let c = audio.getChannelData(0); + + // If dezippering has been removed, the gain output should + // instantly jump at frame 128 to 0.5. + should(c.slice(0, 128), 'output[0:127]').beConstantValueOf(1); + should(c.slice(128), 'output[128:]').beConstantValueOf(0.5); + }) + .then(() => task.done()); + }); + + audit.define( + { + label: 'test2', + description: 'Compare value setter and setValueAtTime' + }, + (task, should) => { + testWithAutomation(should, {prefix: ''}).then(() => task.done()); + }); + + audit.define( + {label: 'test3', description: 'Automation effects'}, + (task, should) => { + testWithAutomation(should, { + prefix: 'With modulation: ', + modulator: true + }).then(() => task.done()); + }); + + audit.run(); + + function testWithAutomation(should, options) { + // Sample rate must be a power of two to eliminate round-off in + // computing the time at render quantum boundaries. + let context = new OfflineAudioContext(2, 1024, 16384); + let merger = new ChannelMergerNode(context, {numberOfChannels: 2}); + merger.connect(context.destination); + + let src = new OscillatorNode(context); + let gainTest = new GainNode(context); + let gainRef = new GainNode(context); + + src.connect(gainTest).connect(merger, 0, 0); + src.connect(gainRef).connect(merger, 0, 1); + + if (options.modulator) { + let mod = new OscillatorNode(context, {frequency: 1000}); + let modGain = new GainNode(context); + mod.connect(modGain); + modGain.connect(gainTest.gain); + modGain.connect(gainRef.gain); + mod.start(); + } + + // Change the gains. Must do the change on a render boundary! + let changeTime = 3 * RENDER_QUANTUM_FRAMES / context.sampleRate; + let newGain = .3; + + gainRef.gain.setValueAtTime(newGain, changeTime); + context.suspend(changeTime) + .then(() => gainTest.gain.value = newGain) + .then(() => context.resume()); + + src.start(); + + return context.startRendering().then(audio => { + let actual = audio.getChannelData(0); + let expected = audio.getChannelData(1); + + // The values using the .value setter must be identical to the + // values using setValueAtTime. + let match = should(actual, options.prefix + '.value setter output') + .beEqualToArray(expected); + + should( + match, + options.prefix + + '.value setter output matches setValueAtTime output') + .beTrue(); + }); + } + </script> + </body> +</html> |