LayoutTests/webaudio/automatic-pull-node.html - chromium/blink - Git at Google

 <!DOCTYPE html>

 <html>
 <head>
 <script src="../resources/js-test.js"></script>
 <script type="text/javascript" src="resources/audio-testing.js"></script>
 </head>

 <body>

 <div id="description"></div>
 <div id="console"></div>

 <script>
 description("This test verifies that the AudioBasicInspectorNode based nodes work correctly.");

 var sampleRate = 44100.0;
 // We carefully arrange the renderLengthInFrames to be a multiple of the AudioNode rendering quantum (AudioNode::ProcessingSizeInFrames)
 // so that AudioSourceNode will not feed tailing zeroes into the context and fail this test.
 var renderLengthInFrames = 256;
 var fftSize = 64;

 var audioDataOne = 255; // Audio data 1.0 in Uint8 format will be 255.
 var audioDataZero = 128; // Audio data 0 in Uint8 format will be 128.

 var context;
 var constantBuffer;
 var bufferSource;
 var analyser;

 function constructCommonGraph() {
     // Create offline audio context.
     context = new webkitOfflineAudioContext(1, renderLengthInFrames, sampleRate);
     constantBuffer = createConstantBuffer(context, renderLengthInFrames, 1);

     bufferSource = context.createBufferSource();
     bufferSource.buffer = constantBuffer;

     analyser = context.createAnalyser();
     analyser.fftSize = fftSize;

     bufferSource.connect(analyser);
 }

 function test1Finished() {
     var timeDomainData = new Uint8Array(fftSize);
     analyser.getByteTimeDomainData(timeDomainData);

     if (timeDomainData[0] >= audioDataOne)
         testPassed("RealtimeAnalyserNode got pulled when connected from upstream node but not to downstream node.");
     else
         testFailed("RealtimeAnalyserNode failed to get pulled when connected from upstream node but not to downstream node.");

     test2();
 }

 // To verify the realtimeAnalyser can pull data when there is an upstream node connected to it
 // but it's not connected to a downstream node.
 function test1() {
     constructCommonGraph();

     bufferSource.noteOn(0);

     context.oncomplete = test1Finished;
     context.startRendering();
 }

 function test2Finished() {
     var timeDomainData = new Uint8Array(fftSize);
     analyser.getByteTimeDomainData(timeDomainData);

     if (timeDomainData[0] >= audioDataOne)
         testPassed("RealtimeAnalyserNode got pulled when connected from upstream node and to destination node.");
     else
         testFailed("RealtimeAnalyserNode failed to be pulled when connected by upstream node and to destination node.");

     test3();
 }

 // To verify the realtimeAnalyser can process normally when there is an upstream node connected to it
 // and it's also connected to a downstream node which ultimately connect to audio destination.
 function test2() {
     constructCommonGraph();

     analyser.connect(context.destination);

     bufferSource.noteOn(0);

     context.oncomplete = test2Finished;
     context.startRendering();
 }

 function test3Finished() {
     var timeDomainData = new Uint8Array(fftSize);
     analyser.getByteTimeDomainData(timeDomainData);

     // If realtimeAnalyser hasn't pulled any data, the data in buffer will be 0.
     if (timeDomainData[0] == audioDataZero)
         testPassed("RealtimeAnalyserNode didn't get pulled when it should not.");
     else
         testFailed("RealtimeAnalyserNode been pulled when it should not.");

     finishJSTest();
 }

 // To verify the realtimeAnalyser will stop pulling if it is connected to a downstream node
 // which is not ultimatly connected to any audio destination.
 function test3() {
     constructCommonGraph();

     var gain = context.createGainNode();
     analyser.connect(gain);

     bufferSource.noteOn(0);

     context.oncomplete = test3Finished;
     context.startRendering();
 }

 function runTest() {
     if (window.testRunner) {
         testRunner.dumpAsText();
         testRunner.waitUntilDone();
     }

     window.jsTestIsAsync = true;

     test1();
 }

 runTest();

 </script>

 </body>
 </html>
	<!DOCTYPE html>

	<html>
	<head>
	<script src="../resources/js-test.js"></script>
	<script type="text/javascript" src="resources/audio-testing.js"></script>
	</head>

	<body>

	<div id="description"></div>
	<div id="console"></div>

	<script>
	description("This test verifies that the AudioBasicInspectorNode based nodes work correctly.");

	var sampleRate = 44100.0;
	// We carefully arrange the renderLengthInFrames to be a multiple of the AudioNode rendering quantum (AudioNode::ProcessingSizeInFrames)
	// so that AudioSourceNode will not feed tailing zeroes into the context and fail this test.
	var renderLengthInFrames = 256;
	var fftSize = 64;

	var audioDataOne = 255; // Audio data 1.0 in Uint8 format will be 255.
	var audioDataZero = 128; // Audio data 0 in Uint8 format will be 128.

	var context;
	var constantBuffer;
	var bufferSource;
	var analyser;

	function constructCommonGraph() {
	// Create offline audio context.
	context = new webkitOfflineAudioContext(1, renderLengthInFrames, sampleRate);
	constantBuffer = createConstantBuffer(context, renderLengthInFrames, 1);

	bufferSource = context.createBufferSource();
	bufferSource.buffer = constantBuffer;

	analyser = context.createAnalyser();
	analyser.fftSize = fftSize;

	bufferSource.connect(analyser);
	}

	function test1Finished() {
	var timeDomainData = new Uint8Array(fftSize);
	analyser.getByteTimeDomainData(timeDomainData);

	if (timeDomainData[0] >= audioDataOne)
	testPassed("RealtimeAnalyserNode got pulled when connected from upstream node but not to downstream node.");
	else
	testFailed("RealtimeAnalyserNode failed to get pulled when connected from upstream node but not to downstream node.");

	test2();
	}

	// To verify the realtimeAnalyser can pull data when there is an upstream node connected to it
	// but it's not connected to a downstream node.
	function test1() {
	constructCommonGraph();

	bufferSource.noteOn(0);

	context.oncomplete = test1Finished;
	context.startRendering();
	}

	function test2Finished() {
	var timeDomainData = new Uint8Array(fftSize);
	analyser.getByteTimeDomainData(timeDomainData);

	if (timeDomainData[0] >= audioDataOne)
	testPassed("RealtimeAnalyserNode got pulled when connected from upstream node and to destination node.");
	else
	testFailed("RealtimeAnalyserNode failed to be pulled when connected by upstream node and to destination node.");

	test3();
	}

	// To verify the realtimeAnalyser can process normally when there is an upstream node connected to it
	// and it's also connected to a downstream node which ultimately connect to audio destination.
	function test2() {
	constructCommonGraph();

	analyser.connect(context.destination);

	bufferSource.noteOn(0);

	context.oncomplete = test2Finished;
	context.startRendering();
	}

	function test3Finished() {
	var timeDomainData = new Uint8Array(fftSize);
	analyser.getByteTimeDomainData(timeDomainData);

	// If realtimeAnalyser hasn't pulled any data, the data in buffer will be 0.
	if (timeDomainData[0] == audioDataZero)
	testPassed("RealtimeAnalyserNode didn't get pulled when it should not.");
	else
	testFailed("RealtimeAnalyserNode been pulled when it should not.");

	finishJSTest();
	}

	// To verify the realtimeAnalyser will stop pulling if it is connected to a downstream node
	// which is not ultimatly connected to any audio destination.
	function test3() {
	constructCommonGraph();

	var gain = context.createGainNode();
	analyser.connect(gain);

	bufferSource.noteOn(0);

	context.oncomplete = test3Finished;
	context.startRendering();
	}

	function runTest() {
	if (window.testRunner) {
	testRunner.dumpAsText();
	testRunner.waitUntilDone();
	}

	window.jsTestIsAsync = true;

	test1();
	}

	runTest();

	</script>

	</body>
	</html>