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Diffstat (limited to 'testing/web-platform/tests/webaudio/the-audio-api/the-audioparam-interface/k-rate-constant-source.html')
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diff --git a/testing/web-platform/tests/webaudio/the-audio-api/the-audioparam-interface/k-rate-constant-source.html b/testing/web-platform/tests/webaudio/the-audio-api/the-audioparam-interface/k-rate-constant-source.html new file mode 100644 index 0000000000..0bea5c91f8 --- /dev/null +++ b/testing/web-platform/tests/webaudio/the-audio-api/the-audioparam-interface/k-rate-constant-source.html @@ -0,0 +1,176 @@ +<!doctype html> +<html> + <head> + <title>Test k-rate AudioParam of ConstantSourceNode</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="automation-rate-testing.js"></script> + </head> + + <body> + <script> + let audit = Audit.createTaskRunner(); + + audit.define('ConstantSource k-rate offset', (task, should) => { + // Arbitrary sample rate and duration. + let sampleRate = 8000; + + // Only new a few render quanta to verify things are working. + let testDuration = 4 * 128 / sampleRate; + + let context = new OfflineAudioContext({ + numberOfChannels: 3, + sampleRate: sampleRate, + length: testDuration * sampleRate + }); + + doTest(context, should, { + sourceNodeName: 'none', + verifyPieceWiseConstant: true, + nodeName: 'ConstantSourceNode', + prefix: 'k-rate offset', + rateSettings: [{name: 'offset', value: 'k-rate'}], + automations: [{ + name: 'offset', + methods: [ + {name: 'setValueAtTime', options: [0, 0]}, { + name: 'linearRampToValueAtTime', + options: [10, testDuration] + } + ] + }] + }).then(() => task.done()); + }); + + // Parameters for the For the following tests. + + // Must be power of two to eliminate round-off + const sampleRate8k = 8192; + + // Arbitrary duration that doesn't need to be too long to verify k-rate + // automations. Probably should be at least a few render quanta. + const testDuration = 8 * RENDER_QUANTUM_FRAMES / sampleRate8k; + + // Basic test that k-rate ConstantSourceNode.offset is k-rate. This is + // the basis for all of the following tests, so make sure it's right. + audit.define( + { + label: 'ConstantSourceNode.offset k-rate automation', + description: + 'Explicitly test ConstantSourceNode.offset k-rate automation is k-rate' + }, + (task, should) => { + let context = new OfflineAudioContext({ + numberOfChannels: 2, + sampleRate: sampleRate8k, + length: testDuration * sampleRate8k + }); + let merger = new ChannelMergerNode( + context, {numberOfInputs: context.destination.channelCount}); + merger.connect(context.destination); + + // k-rate ConstantSource.offset using a linear ramp starting at 0 + // and incrementing by 1 for each frame. + let src = new ConstantSourceNode(context, {offset: 0}); + src.offset.automationRate = 'k-rate'; + + src.offset.setValueAtTime(0, 0); + src.offset.linearRampToValueAtTime(context.length, testDuration); + + src.connect(merger, 0, 0); + + src.start(); + + // a-rate ConstantSource using the same ramp as above. + let refSrc = new ConstantSourceNode(context, {offset: 0}); + + refSrc.offset.setValueAtTime(0, 0); + refSrc.offset.linearRampToValueAtTime(context.length, testDuration); + + refSrc.connect(merger, 0, 1); + + refSrc.start(); + + context.startRendering() + .then(buffer => { + let actual = buffer.getChannelData(0); + let expected = buffer.getChannelData(1); + + for (let k = 0; k < actual.length; + k += RENDER_QUANTUM_FRAMES) { + // Verify that the k-rate output is constant over the render + // and that it matches the value of the a-rate value at the + // beginning of the render. + should( + actual.slice(k, k + RENDER_QUANTUM_FRAMES), + `k-rate ConstantSource.offset: output[${k}:${ + k + RENDER_QUANTUM_FRAMES}]`) + .beConstantValueOf(expected[k]); + } + }) + .then(() => task.done()); + }); + + // This test verifies that a k-rate input to the ConstantSourceNode.offset + // works just as if we set the AudioParam to be k-rate. This is the basis + // of the following tests, so make sure it works. + audit.define( + { + label: 'ConstantSource.offset', + description: 'Verify k-rate automation matches k-rate input' + }, + (task, should) => { + let context = new OfflineAudioContext({ + numberOfChannels: 2, + sampleRate: sampleRate8k, + length: testDuration * sampleRate8k + }); + + let merger = new ChannelMergerNode( + context, {numberOfInputs: context.destination.channelCount}); + merger.connect(context.destination); + + let tstSrc = new ConstantSourceNode(context); + let tstMod = new ConstantSourceNode(context); + tstSrc.offset.automationRate = 'k-rate'; + tstMod.offset.linearRampToValueAtTime(context.length, testDuration); + + tstMod.connect(tstSrc.offset) + tstSrc.connect(merger, 0, 0); + + let refSrc = new ConstantSourceNode(context); + let refMod = new ConstantSourceNode(context); + refMod.offset.linearRampToValueAtTime(context.length, testDuration); + refMod.offset.automationRate = 'k-rate'; + + refMod.connect(refSrc.offset); + refSrc.connect(merger, 0, 1); + + tstSrc.start(); + tstMod.start(); + refSrc.start(); + refMod.start(); + + context.startRendering() + .then(buffer => { + let actual = buffer.getChannelData(0); + let expected = buffer.getChannelData(1); + + for (let k = 0; k < context.length; + k += RENDER_QUANTUM_FRAMES) { + should( + actual.slice(k, k + RENDER_QUANTUM_FRAMES), + `ConstantSource.offset k-rate input: output[${k}:${ + k + RENDER_QUANTUM_FRAMES}]`) + .beConstantValueOf(expected[k]); + } + }) + .then(() => task.done()); + }); + + audit.run(); + </script> + </body> +</html> |