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diff --git a/testing/web-platform/tests/webaudio/the-audio-api/the-constantsourcenode-interface/constant-source-output.html b/testing/web-platform/tests/webaudio/the-audio-api/the-constantsourcenode-interface/constant-source-output.html new file mode 100644 index 0000000000..5990376cff --- /dev/null +++ b/testing/web-platform/tests/webaudio/the-audio-api/the-constantsourcenode-interface/constant-source-output.html @@ -0,0 +1,207 @@ +<!DOCTYPE html> +<html> + <head> + <title> + Test ConstantSourceNode Output + </title> + <script src="/resources/testharness.js"></script> + <script src="/resources/testharnessreport.js"></script> + <script src="../../resources/audit-util.js"></script> + <script src="../../resources/audit.js"></script> + <script src="../../resources/audioparam-testing.js"></script> + </head> + <body> + <script id="layout-test-code"> + let sampleRate = 48000; + let renderDuration = 0.125; + let renderFrames = sampleRate * renderDuration; + + let audit = Audit.createTaskRunner(); + + audit.define('constant source', (task, should) => { + // Verify a constant source outputs the correct (fixed) constant. + let context = new OfflineAudioContext(1, renderFrames, sampleRate); + let node = new ConstantSourceNode(context, {offset: 0.5}); + node.connect(context.destination); + node.start(); + + context.startRendering() + .then(function(buffer) { + let actual = buffer.getChannelData(0); + let expected = new Float32Array(actual.length); + expected.fill(node.offset.value); + + should(actual, 'Basic: ConstantSourceNode({offset: 0.5})') + .beEqualToArray(expected); + }) + .then(() => task.done()); + }); + + audit.define('stop before start', (task, should) => { + let context = new OfflineAudioContext(1, renderFrames, sampleRate); + let node = new ConstantSourceNode(context, {offset: 1}); + node.connect(context.destination); + node.start(61 / context.sampleRate); + node.stop(31 / context.sampleRate); + + context.startRendering() + .then(function(buffer) { + let actual = buffer.getChannelData(0); + should(actual, + "ConstantSourceNode with stop before " + + "start must output silence") + .beConstantValueOf(0); + }) + .then(() => task.done()); + }); + + audit.define('stop equal to start', (task, should) => { + let context = new OfflineAudioContext(1, renderFrames, sampleRate); + let node = new ConstantSourceNode(context, {offset: 1}); + node.connect(context.destination); + node.start(31 / context.sampleRate); + node.stop(31 / context.sampleRate); + + context.startRendering() + .then(function(buffer) { + let actual = buffer.getChannelData(0); + should(actual, + "ConstantSourceNode with stop equal to start " + + " must output silence") + .beConstantValueOf(0); + }) + .then(() => task.done()); + }); + + audit.define('start/stop', (task, should) => { + // Verify a constant source starts and stops at the correct time and has + // the correct (fixed) value. + let context = new OfflineAudioContext(1, renderFrames, sampleRate); + let node = new ConstantSourceNode(context, {offset: 1}); + node.connect(context.destination); + + let startFrame = 10; + let stopFrame = 300; + + node.start(startFrame / context.sampleRate); + node.stop(stopFrame / context.sampleRate); + + context.startRendering() + .then(function(buffer) { + let actual = buffer.getChannelData(0); + let expected = new Float32Array(actual.length); + // The expected output is all 1s from start to stop time. + expected.fill(0); + + for (let k = startFrame; k < stopFrame; ++k) { + expected[k] = node.offset.value; + } + + let prefix = 'start/stop: '; + should(actual.slice(0, startFrame), + prefix + 'ConstantSourceNode frames [0, ' + + startFrame + ')') + .beConstantValueOf(0); + + should(actual.slice(startFrame, stopFrame), + prefix + 'ConstantSourceNode frames [' + + startFrame + ', ' + stopFrame + ')') + .beConstantValueOf(1); + + should( + actual.slice(stopFrame), + prefix + 'ConstantSourceNode frames [' + stopFrame + + ', ' + renderFrames + ')') + .beConstantValueOf(0); + }) + .then(() => task.done()); + + }); + + audit.define('basic automation', (task, should) => { + // Verify that automation works as expected. + let context = new OfflineAudioContext(1, renderFrames, sampleRate); + let source = context.createConstantSource(); + source.connect(context.destination); + + let rampEndTime = renderDuration / 2; + source.offset.setValueAtTime(0.5, 0); + source.offset.linearRampToValueAtTime(1, rampEndTime); + + source.start(); + + context.startRendering() + .then(function(buffer) { + let actual = buffer.getChannelData(0); + let expected = createLinearRampArray( + 0, rampEndTime, 0.5, 1, context.sampleRate); + + let rampEndFrame = Math.ceil(rampEndTime * context.sampleRate); + let prefix = 'Automation: '; + + should(actual.slice(0, rampEndFrame), + prefix + 'ConstantSourceNode.linearRamp(1, 0.5)') + .beCloseToArray(expected, { + // Experimentally determined threshold. + relativeThreshold: 7.1610e-7 + }); + + should(actual.slice(rampEndFrame), + prefix + 'ConstantSourceNode after ramp') + .beConstantValueOf(1); + }) + .then(() => task.done()); + }); + + audit.define('connected audioparam', (task, should) => { + // Verify the constant source output with connected AudioParam produces + // the correct output. + let context = new OfflineAudioContext(2, renderFrames, sampleRate) + context.destination.channelInterpretation = 'discrete'; + let source = new ConstantSourceNode(context, {offset: 1}); + let osc = context.createOscillator(); + let merger = context.createChannelMerger(2); + merger.connect(context.destination); + + source.connect(merger, 0, 0); + osc.connect(merger, 0, 1); + osc.connect(source.offset); + + osc.start(); + let sourceStartFrame = 10; + source.start(sourceStartFrame / context.sampleRate); + + context.startRendering() + .then(function(buffer) { + // Channel 0 and 1 should be identical, except channel 0 (the + // source) is silent at the beginning. + let actual = buffer.getChannelData(0); + let expected = buffer.getChannelData(1); + // The expected output should be oscillator + 1 because offset + // is 1. + expected = expected.map(x => 1 + x); + let prefix = 'Connected param: '; + + // The initial part of the output should be silent because the + // source node hasn't started yet. + should( + actual.slice(0, sourceStartFrame), + prefix + 'ConstantSourceNode frames [0, ' + sourceStartFrame + + ')') + .beConstantValueOf(0); + // The rest of the output should be the same as the oscillator (in + // channel 1) + should( + actual.slice(sourceStartFrame), + prefix + 'ConstantSourceNode frames [' + sourceStartFrame + + ', ' + renderFrames + ')') + .beCloseToArray(expected.slice(sourceStartFrame), 0); + + }) + .then(() => task.done()); + }); + + audit.run(); + </script> + </body> +</html> |