LayoutTests/webaudio/AudioListener/audiolistener-automation-position.html - WebKit - Git at Google

 <!DOCTYPE html>
 <html>
   <head>
     <title>
       Test Automation of AudioListener
     </title>
     <script src="../../imported/w3c/web-platform-tests/resources/testharness.js"></script>
     <script src="../../resources/testharnessreport.js"></script>
     <script src="../resources/audit-util.js"></script>
     <script src="../resources/audit.js"></script>
   </head>
   <body>
     <script id="layout-test-code">
       let sampleRate = 48000;
       // These tests are quite slow, so don't run for many frames.  1024 frames
       // should be enough to demonstrate that automations are working.
       let renderFrames = 1024;
       let renderDuration = renderFrames / sampleRate;

       // End time of the automation.  Fairly arbitrary, but must be less than
       // the render duration so that we can verify that the automation did end
       // at the correct time and value.
       let endTime = 0.75 * renderDuration;

       let audit = Audit.createTaskRunner();

       // Starting position for the panner
       let defaultStartPosition = {x: 0, y: 0, z: 0};

       // Ending position for the panner
       let pannerEndPosition = {x: 1000, y: 1000, z: 1000};

       // Ending position for the listener.  It MUST be the the negative of the
       // pannerEndPosition!
       let listenerEndPosition = {
         x: -pannerEndPosition.x,
         y: -pannerEndPosition.y,
         z: -pannerEndPosition.z
       };


       // Test the linear, inverse, and exponential distance models when the
       // AudioListener is moving instead of the panner.  We take advantage that
       // motion is relative and create a reference by moving the panner in one
       // direction.  The resulting output is the expected result.  Then we redo
       // the test, but this time move the listener in the opposite direction.
       // The output of this test is compared against the panner result.  They
       // should be the same.

       audit.define('linear', (task, should) => {
         runTest({
           should: should,
           startPosition: defaultStartPosition,
           endPosition: pannerEndPosition,
           distanceModel: {model: 'linear', rolloff: 1}
         }).then(() => task.done());
       });

       audit.define('exponential', (task, should) => {
         runTest({
           should: should,
           startPosition: defaultStartPosition,
           endPosition: pannerEndPosition,
           distanceModel: {model: 'exponential', rolloff: 1.5}
         }).then(() => task.done());
       });

       audit.define('inverse', (task, should) => {
         runTest({
           should: should,
           startPosition: defaultStartPosition,
           endPosition: pannerEndPosition,
           distanceModel: {model: 'inverse', rolloff: 1}
         }).then(() => task.done());
       });

       audit.run();

       function createGraph() {
         let context = new OfflineAudioContext(2, renderFrames, sampleRate);
         // Stereo source for the panner.
         let source = context.createBufferSource();
         source.buffer = createConstantBuffer(context, renderFrames, [1, 2]);

         let panner = context.createPanner();
         panner.panningModel = 'equalpower';

         source.connect(panner);
         panner.connect(context.destination);

         return {context: context, source: source, panner: panner};
       }

       // Run a listener test with the given options.
       function runTest(options) {
         let refResult;

         return runPannerTest(options)
             .then(function(renderedBuffer) {
               refResult = renderedBuffer;
             })
             .then(function() {
               // Move the listener in the opposite direction.
               options.endPosition = listenerEndPosition;
               return runListenerTest(options).then(function(renderedBuffer) {
                 compareResults(renderedBuffer, refResult, options);
               });
             });
       }

       function runPannerTest(options) {
         let graph = createGraph();

         return runTestCore(graph, options, graph.panner);
       }


       function runListenerTest(options) {
         let graph = createGraph();

         return runTestCore(graph, options, graph.context.listener);
       }

       function runTestCore(graph, options, audioOjbect) {
         let {context, source, panner} = graph;

         // Initialize the panner with known values.
         panner.distanceModel = options.distanceModel.model;
         panner.rolloffFactor = options.distanceModel.rolloff;
         panner.panningModel = 'equalpower';

         // Automate the location.  audioObject must be either a PannerNode or
         // the context's AudioListener.

         audioOjbect.positionX.setValueAtTime(options.startPosition.x, 0);
         audioOjbect.positionY.setValueAtTime(options.startPosition.y, 0);
         audioOjbect.positionZ.setValueAtTime(options.startPosition.z, 0);

         audioOjbect.positionX.linearRampToValueAtTime(
             options.endPosition.x, endTime);
         audioOjbect.positionY.linearRampToValueAtTime(
             options.endPosition.y, endTime);
         audioOjbect.positionZ.linearRampToValueAtTime(
             options.endPosition.z, endTime);

         // Start the source, render the graph, and return the resulting promise
         // from rendering.
         source.start();

         return context.startRendering().then(function(resultBuffer) {
           return resultBuffer;
         });
       }

       function compareResults(actualResult, expectedResult, options) {
         // Compare the output with the reference output from moving the source
         // in the opposite direction.

         let expectedLeft = expectedResult.getChannelData(0);
         let expectedRight = expectedResult.getChannelData(1);

         let actualLeft = actualResult.getChannelData(0);
         let actualRight = actualResult.getChannelData(1);

         let prefix = 'Distance model: "' + options.distanceModel.model + '"';
         prefix += ', rolloff: ' + options.distanceModel.rolloff;
         options.should(actualLeft, prefix + ': left channel')
             .beCloseToArray(expectedLeft, 0);
         options.should(actualRight, prefix + ': right channel')
             .beCloseToArray(expectedRight, 0);
       }
     </script>
   </body>
 </html>
	<!DOCTYPE html>
	<html>
	<head>
	<title>
	Test Automation of AudioListener
	</title>
	<script src="../../imported/w3c/web-platform-tests/resources/testharness.js"></script>
	<script src="../../resources/testharnessreport.js"></script>
	<script src="../resources/audit-util.js"></script>
	<script src="../resources/audit.js"></script>
	</head>
	<body>
	<script id="layout-test-code">
	let sampleRate = 48000;
	// These tests are quite slow, so don't run for many frames. 1024 frames
	// should be enough to demonstrate that automations are working.
	let renderFrames = 1024;
	let renderDuration = renderFrames / sampleRate;

	// End time of the automation. Fairly arbitrary, but must be less than
	// the render duration so that we can verify that the automation did end
	// at the correct time and value.
	let endTime = 0.75 * renderDuration;

	let audit = Audit.createTaskRunner();

	// Starting position for the panner
	let defaultStartPosition = {x: 0, y: 0, z: 0};

	// Ending position for the panner
	let pannerEndPosition = {x: 1000, y: 1000, z: 1000};

	// Ending position for the listener. It MUST be the the negative of the
	// pannerEndPosition!
	let listenerEndPosition = {
	x: -pannerEndPosition.x,
	y: -pannerEndPosition.y,
	z: -pannerEndPosition.z
	};


	// Test the linear, inverse, and exponential distance models when the
	// AudioListener is moving instead of the panner. We take advantage that
	// motion is relative and create a reference by moving the panner in one
	// direction. The resulting output is the expected result. Then we redo
	// the test, but this time move the listener in the opposite direction.
	// The output of this test is compared against the panner result. They
	// should be the same.

	audit.define('linear', (task, should) => {
	runTest({
	should: should,
	startPosition: defaultStartPosition,
	endPosition: pannerEndPosition,
	distanceModel: {model: 'linear', rolloff: 1}
	}).then(() => task.done());
	});

	audit.define('exponential', (task, should) => {
	runTest({
	should: should,
	startPosition: defaultStartPosition,
	endPosition: pannerEndPosition,
	distanceModel: {model: 'exponential', rolloff: 1.5}
	}).then(() => task.done());
	});

	audit.define('inverse', (task, should) => {
	runTest({
	should: should,
	startPosition: defaultStartPosition,
	endPosition: pannerEndPosition,
	distanceModel: {model: 'inverse', rolloff: 1}
	}).then(() => task.done());
	});

	audit.run();

	function createGraph() {
	let context = new OfflineAudioContext(2, renderFrames, sampleRate);
	// Stereo source for the panner.
	let source = context.createBufferSource();
	source.buffer = createConstantBuffer(context, renderFrames, [1, 2]);

	let panner = context.createPanner();
	panner.panningModel = 'equalpower';

	source.connect(panner);
	panner.connect(context.destination);

	return {context: context, source: source, panner: panner};
	}

	// Run a listener test with the given options.
	function runTest(options) {
	let refResult;

	return runPannerTest(options)
	.then(function(renderedBuffer) {
	refResult = renderedBuffer;
	})
	.then(function() {
	// Move the listener in the opposite direction.
	options.endPosition = listenerEndPosition;
	return runListenerTest(options).then(function(renderedBuffer) {
	compareResults(renderedBuffer, refResult, options);
	});
	});
	}

	function runPannerTest(options) {
	let graph = createGraph();

	return runTestCore(graph, options, graph.panner);
	}


	function runListenerTest(options) {
	let graph = createGraph();

	return runTestCore(graph, options, graph.context.listener);
	}

	function runTestCore(graph, options, audioOjbect) {
	let {context, source, panner} = graph;

	// Initialize the panner with known values.
	panner.distanceModel = options.distanceModel.model;
	panner.rolloffFactor = options.distanceModel.rolloff;
	panner.panningModel = 'equalpower';

	// Automate the location. audioObject must be either a PannerNode or
	// the context's AudioListener.

	audioOjbect.positionX.setValueAtTime(options.startPosition.x, 0);
	audioOjbect.positionY.setValueAtTime(options.startPosition.y, 0);
	audioOjbect.positionZ.setValueAtTime(options.startPosition.z, 0);

	audioOjbect.positionX.linearRampToValueAtTime(
	options.endPosition.x, endTime);
	audioOjbect.positionY.linearRampToValueAtTime(
	options.endPosition.y, endTime);
	audioOjbect.positionZ.linearRampToValueAtTime(
	options.endPosition.z, endTime);

	// Start the source, render the graph, and return the resulting promise
	// from rendering.
	source.start();

	return context.startRendering().then(function(resultBuffer) {
	return resultBuffer;
	});
	}

	function compareResults(actualResult, expectedResult, options) {
	// Compare the output with the reference output from moving the source
	// in the opposite direction.

	let expectedLeft = expectedResult.getChannelData(0);
	let expectedRight = expectedResult.getChannelData(1);

	let actualLeft = actualResult.getChannelData(0);
	let actualRight = actualResult.getChannelData(1);

	let prefix = 'Distance model: "' + options.distanceModel.model + '"';
	prefix += ', rolloff: ' + options.distanceModel.rolloff;
	options.should(actualLeft, prefix + ': left channel')
	.beCloseToArray(expectedLeft, 0);
	options.should(actualRight, prefix + ': right channel')
	.beCloseToArray(expectedRight, 0);
	}
	</script>
	</body>
	</html>