LayoutTests/imported/w3c/web-platform-tests/webaudio/the-audio-api/the-audionode-interface/audionode-channel-rules.html - WebKit - Git at Google

 <!DOCTYPE html>
 <html>
   <head>
     <title>
       audionode-channel-rules.html
     </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="/webaudio/resources/mixing-rules.js"></script>
   </head>
   <body>
     <script id="layout-test-code">
       let audit = Audit.createTaskRunner();
       let context = 0;
       // Use a power of two to eliminate round-off converting frames to time.
       let sampleRate = 32768;
       let renderNumberOfChannels = 8;
       let singleTestFrameLength = 8;
       let testBuffers;

       // A list of connections to an AudioNode input, each of which is to be
       // used in one or more specific test cases.  Each element in the list is a
       // string, with the number of connections corresponding to the length of
       // the string, and each character in the string is from '1' to '8'
       // representing a 1 to 8 channel connection (from an AudioNode output).

       // For example, the string "128" means 3 connections, having 1, 2, and 8
       // channels respectively.

       let connectionsList = [
         '1', '2', '3', '4', '5', '6', '7', '8', '11', '12', '14', '18', '111',
         '122', '123', '124', '128'
       ];

       // A list of mixing rules, each of which will be tested against all of the
       // connections in connectionsList.
       let mixingRulesList = [
         {
           channelCount: 2,
           channelCountMode: 'max',
           channelInterpretation: 'speakers'
         },
         {
           channelCount: 4,
           channelCountMode: 'clamped-max',
           channelInterpretation: 'speakers'
         },

         // Test up-down-mix to some explicit speaker layouts.
         {
           channelCount: 1,
           channelCountMode: 'explicit',
           channelInterpretation: 'speakers'
         },
         {
           channelCount: 2,
           channelCountMode: 'explicit',
           channelInterpretation: 'speakers'
         },
         {
           channelCount: 4,
           channelCountMode: 'explicit',
           channelInterpretation: 'speakers'
         },
         {
           channelCount: 6,
           channelCountMode: 'explicit',
           channelInterpretation: 'speakers'
         },

         {
           channelCount: 2,
           channelCountMode: 'max',
           channelInterpretation: 'discrete'
         },
         {
           channelCount: 4,
           channelCountMode: 'clamped-max',
           channelInterpretation: 'discrete'
         },
         {
           channelCount: 4,
           channelCountMode: 'explicit',
           channelInterpretation: 'discrete'
         },
         {
           channelCount: 8,
           channelCountMode: 'explicit',
           channelInterpretation: 'discrete'
         },
       ];

       let numberOfTests = mixingRulesList.length * connectionsList.length;

       // Print out the information for an individual test case.
       function printTestInformation(
           testNumber, actualBuffer, expectedBuffer, frameLength, frameOffset) {
         let actual = stringifyBuffer(actualBuffer, frameLength);
         let expected =
             stringifyBuffer(expectedBuffer, frameLength, frameOffset);
         debug('TEST CASE #' + testNumber + '\n');
         debug('actual channels:\n' + actual);
         debug('expected channels:\n' + expected);
       }

       function scheduleTest(
           testNumber, connections, channelCount, channelCountMode,
           channelInterpretation) {
         let mixNode = context.createGain();
         mixNode.channelCount = channelCount;
         mixNode.channelCountMode = channelCountMode;
         mixNode.channelInterpretation = channelInterpretation;
         mixNode.connect(context.destination);

         for (let i = 0; i < connections.length; ++i) {
           let connectionNumberOfChannels =
               connections.charCodeAt(i) - '0'.charCodeAt(0);

           let source = context.createBufferSource();
           // Get a buffer with the right number of channels, converting from
           // 1-based to 0-based index.
           let buffer = testBuffers[connectionNumberOfChannels - 1];
           source.buffer = buffer;
           source.connect(mixNode);

           // Start at the right offset.
           let sampleFrameOffset = testNumber * singleTestFrameLength;
           let time = sampleFrameOffset / sampleRate;
           source.start(time);
         }
       }

       function checkTestResult(
           renderedBuffer, testNumber, connections, channelCount,
           channelCountMode, channelInterpretation, should) {
         let s = 'connections: ' + connections + ', ' + channelCountMode;

         // channelCount is ignored in "max" mode.
         if (channelCountMode == 'clamped-max' ||
             channelCountMode == 'explicit') {
           s += '(' + channelCount + ')';
         }

         s += ', ' + channelInterpretation;

         let computedNumberOfChannels = computeNumberOfChannels(
             connections, channelCount, channelCountMode);

         // Create a zero-initialized silent AudioBuffer with
         // computedNumberOfChannels.
         let destBuffer = context.createBuffer(
             computedNumberOfChannels, singleTestFrameLength,
             context.sampleRate);

         // Mix all of the connections into the destination buffer.
         for (let i = 0; i < connections.length; ++i) {
           let connectionNumberOfChannels =
               connections.charCodeAt(i) - '0'.charCodeAt(0);
           let sourceBuffer =
               testBuffers[connectionNumberOfChannels - 1];  // convert from
                                                             // 1-based to
                                                             // 0-based index

           if (channelInterpretation == 'speakers') {
             speakersSum(sourceBuffer, destBuffer);
           } else if (channelInterpretation == 'discrete') {
             discreteSum(sourceBuffer, destBuffer);
           } else {
             alert('Invalid channel interpretation!');
           }
         }

         // Use this when debugging mixing rules.
         // printTestInformation(testNumber, renderedBuffer, destBuffer,
         // singleTestFrameLength, sampleFrameOffset);

         // Validate that destBuffer matches the rendered output.  We need to
         // check the rendered output at a specific sample-frame-offset
         // corresponding to the specific test case we're checking for based on
         // testNumber.

         let sampleFrameOffset = testNumber * singleTestFrameLength;
         for (let c = 0; c < renderNumberOfChannels; ++c) {
           let renderedData = renderedBuffer.getChannelData(c);
           for (let frame = 0; frame < singleTestFrameLength; ++frame) {
             let renderedValue = renderedData[frame + sampleFrameOffset];

             let expectedValue = 0;
             if (c < destBuffer.numberOfChannels) {
               let expectedData = destBuffer.getChannelData(c);
               expectedValue = expectedData[frame];
             }

             // We may need to add an epsilon in the comparison if we add more
             // test vectors.
             if (renderedValue != expectedValue) {
               let message = s + 'rendered: ' + renderedValue +
                   ' expected: ' + expectedValue + ' channel: ' + c +
                   ' frame: ' + frame;
               // testFailed(s);
               should(renderedValue, s).beEqualTo(expectedValue);
               return;
             }
           }
         }

         should(true, s).beTrue();
       }

       function checkResult(buffer, should) {
         // Sanity check result.
         should(buffer.length, 'Rendered number of frames')
             .beEqualTo(numberOfTests * singleTestFrameLength);
         should(buffer.numberOfChannels, 'Rendered number of channels')
             .beEqualTo(renderNumberOfChannels);

         // Check all the tests.
         let testNumber = 0;
         for (let m = 0; m < mixingRulesList.length; ++m) {
           let mixingRules = mixingRulesList[m];
           for (let i = 0; i < connectionsList.length; ++i, ++testNumber) {
             checkTestResult(
                 buffer, testNumber, connectionsList[i],
                 mixingRules.channelCount, mixingRules.channelCountMode,
                 mixingRules.channelInterpretation, should);
           }
         }
       }

       audit.define(
           {label: 'test', description: 'Channel mixing rules for AudioNodes'},
           function(task, should) {

             // Create 8-channel offline audio context.  Each test will render 8
             // sample-frames starting at sample-frame position testNumber * 8.
             let totalFrameLength = numberOfTests * singleTestFrameLength;
             context = new OfflineAudioContext(
                 renderNumberOfChannels, totalFrameLength, sampleRate);

             // Set destination to discrete mixing.
             context.destination.channelCount = renderNumberOfChannels;
             context.destination.channelCountMode = 'explicit';
             context.destination.channelInterpretation = 'discrete';

             // Create test buffers from 1 to 8 channels.
             testBuffers = new Array();
             for (let i = 0; i < renderNumberOfChannels; ++i) {
               testBuffers[i] = createShiftedImpulseBuffer(
                   context, i + 1, singleTestFrameLength);
             }

             // Schedule all the tests.
             let testNumber = 0;
             for (let m = 0; m < mixingRulesList.length; ++m) {
               let mixingRules = mixingRulesList[m];
               for (let i = 0; i < connectionsList.length; ++i, ++testNumber) {
                 scheduleTest(
                     testNumber, connectionsList[i], mixingRules.channelCount,
                     mixingRules.channelCountMode,
                     mixingRules.channelInterpretation);
               }
             }

             // Render then check results.
             // context.oncomplete = checkResult;
             context.startRendering().then(buffer => {
               checkResult(buffer, should);
               task.done();
             });
             ;
           });

       audit.run();
     </script>
   </body>
 </html>
	<!DOCTYPE html>
	<html>
	<head>
	<title>
	audionode-channel-rules.html
	</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="/webaudio/resources/mixing-rules.js"></script>
	</head>
	<body>
	<script id="layout-test-code">
	let audit = Audit.createTaskRunner();
	let context = 0;
	// Use a power of two to eliminate round-off converting frames to time.
	let sampleRate = 32768;
	let renderNumberOfChannels = 8;
	let singleTestFrameLength = 8;
	let testBuffers;

	// A list of connections to an AudioNode input, each of which is to be
	// used in one or more specific test cases. Each element in the list is a
	// string, with the number of connections corresponding to the length of
	// the string, and each character in the string is from '1' to '8'
	// representing a 1 to 8 channel connection (from an AudioNode output).

	// For example, the string "128" means 3 connections, having 1, 2, and 8
	// channels respectively.

	let connectionsList = [
	'1', '2', '3', '4', '5', '6', '7', '8', '11', '12', '14', '18', '111',
	'122', '123', '124', '128'
	];

	// A list of mixing rules, each of which will be tested against all of the
	// connections in connectionsList.
	let mixingRulesList = [
	{
	channelCount: 2,
	channelCountMode: 'max',
	channelInterpretation: 'speakers'
	},
	{
	channelCount: 4,
	channelCountMode: 'clamped-max',
	channelInterpretation: 'speakers'
	},

	// Test up-down-mix to some explicit speaker layouts.
	{
	channelCount: 1,
	channelCountMode: 'explicit',
	channelInterpretation: 'speakers'
	},
	{
	channelCount: 2,
	channelCountMode: 'explicit',
	channelInterpretation: 'speakers'
	},
	{
	channelCount: 4,
	channelCountMode: 'explicit',
	channelInterpretation: 'speakers'
	},
	{
	channelCount: 6,
	channelCountMode: 'explicit',
	channelInterpretation: 'speakers'
	},

	{
	channelCount: 2,
	channelCountMode: 'max',
	channelInterpretation: 'discrete'
	},
	{
	channelCount: 4,
	channelCountMode: 'clamped-max',
	channelInterpretation: 'discrete'
	},
	{
	channelCount: 4,
	channelCountMode: 'explicit',
	channelInterpretation: 'discrete'
	},
	{
	channelCount: 8,
	channelCountMode: 'explicit',
	channelInterpretation: 'discrete'
	},
	];

	let numberOfTests = mixingRulesList.length * connectionsList.length;

	// Print out the information for an individual test case.
	function printTestInformation(
	testNumber, actualBuffer, expectedBuffer, frameLength, frameOffset) {
	let actual = stringifyBuffer(actualBuffer, frameLength);
	let expected =
	stringifyBuffer(expectedBuffer, frameLength, frameOffset);
	debug('TEST CASE #' + testNumber + '\n');
	debug('actual channels:\n' + actual);
	debug('expected channels:\n' + expected);
	}

	function scheduleTest(
	testNumber, connections, channelCount, channelCountMode,
	channelInterpretation) {
	let mixNode = context.createGain();
	mixNode.channelCount = channelCount;
	mixNode.channelCountMode = channelCountMode;
	mixNode.channelInterpretation = channelInterpretation;
	mixNode.connect(context.destination);

	for (let i = 0; i < connections.length; ++i) {
	let connectionNumberOfChannels =
	connections.charCodeAt(i) - '0'.charCodeAt(0);

	let source = context.createBufferSource();
	// Get a buffer with the right number of channels, converting from
	// 1-based to 0-based index.
	let buffer = testBuffers[connectionNumberOfChannels - 1];
	source.buffer = buffer;
	source.connect(mixNode);

	// Start at the right offset.
	let sampleFrameOffset = testNumber * singleTestFrameLength;
	let time = sampleFrameOffset / sampleRate;
	source.start(time);
	}
	}

	function checkTestResult(
	renderedBuffer, testNumber, connections, channelCount,
	channelCountMode, channelInterpretation, should) {
	let s = 'connections: ' + connections + ', ' + channelCountMode;

	// channelCount is ignored in "max" mode.
	if (channelCountMode == 'clamped-max' \|\|
	channelCountMode == 'explicit') {
	s += '(' + channelCount + ')';
	}

	s += ', ' + channelInterpretation;

	let computedNumberOfChannels = computeNumberOfChannels(
	connections, channelCount, channelCountMode);

	// Create a zero-initialized silent AudioBuffer with
	// computedNumberOfChannels.
	let destBuffer = context.createBuffer(
	computedNumberOfChannels, singleTestFrameLength,
	context.sampleRate);

	// Mix all of the connections into the destination buffer.
	for (let i = 0; i < connections.length; ++i) {
	let connectionNumberOfChannels =
	connections.charCodeAt(i) - '0'.charCodeAt(0);
	let sourceBuffer =
	testBuffers[connectionNumberOfChannels - 1]; // convert from
	// 1-based to
	// 0-based index

	if (channelInterpretation == 'speakers') {
	speakersSum(sourceBuffer, destBuffer);
	} else if (channelInterpretation == 'discrete') {
	discreteSum(sourceBuffer, destBuffer);
	} else {
	alert('Invalid channel interpretation!');
	}
	}

	// Use this when debugging mixing rules.
	// printTestInformation(testNumber, renderedBuffer, destBuffer,
	// singleTestFrameLength, sampleFrameOffset);

	// Validate that destBuffer matches the rendered output. We need to
	// check the rendered output at a specific sample-frame-offset
	// corresponding to the specific test case we're checking for based on
	// testNumber.

	let sampleFrameOffset = testNumber * singleTestFrameLength;
	for (let c = 0; c < renderNumberOfChannels; ++c) {
	let renderedData = renderedBuffer.getChannelData(c);
	for (let frame = 0; frame < singleTestFrameLength; ++frame) {
	let renderedValue = renderedData[frame + sampleFrameOffset];

	let expectedValue = 0;
	if (c < destBuffer.numberOfChannels) {
	let expectedData = destBuffer.getChannelData(c);
	expectedValue = expectedData[frame];
	}

	// We may need to add an epsilon in the comparison if we add more
	// test vectors.
	if (renderedValue != expectedValue) {
	let message = s + 'rendered: ' + renderedValue +
	' expected: ' + expectedValue + ' channel: ' + c +
	' frame: ' + frame;
	// testFailed(s);
	should(renderedValue, s).beEqualTo(expectedValue);
	return;
	}
	}
	}

	should(true, s).beTrue();
	}

	function checkResult(buffer, should) {
	// Sanity check result.
	should(buffer.length, 'Rendered number of frames')
	.beEqualTo(numberOfTests * singleTestFrameLength);
	should(buffer.numberOfChannels, 'Rendered number of channels')
	.beEqualTo(renderNumberOfChannels);

	// Check all the tests.
	let testNumber = 0;
	for (let m = 0; m < mixingRulesList.length; ++m) {
	let mixingRules = mixingRulesList[m];
	for (let i = 0; i < connectionsList.length; ++i, ++testNumber) {
	checkTestResult(
	buffer, testNumber, connectionsList[i],
	mixingRules.channelCount, mixingRules.channelCountMode,
	mixingRules.channelInterpretation, should);
	}
	}
	}

	audit.define(
	{label: 'test', description: 'Channel mixing rules for AudioNodes'},
	function(task, should) {

	// Create 8-channel offline audio context. Each test will render 8
	// sample-frames starting at sample-frame position testNumber * 8.
	let totalFrameLength = numberOfTests * singleTestFrameLength;
	context = new OfflineAudioContext(
	renderNumberOfChannels, totalFrameLength, sampleRate);

	// Set destination to discrete mixing.
	context.destination.channelCount = renderNumberOfChannels;
	context.destination.channelCountMode = 'explicit';
	context.destination.channelInterpretation = 'discrete';

	// Create test buffers from 1 to 8 channels.
	testBuffers = new Array();
	for (let i = 0; i < renderNumberOfChannels; ++i) {
	testBuffers[i] = createShiftedImpulseBuffer(
	context, i + 1, singleTestFrameLength);
	}

	// Schedule all the tests.
	let testNumber = 0;
	for (let m = 0; m < mixingRulesList.length; ++m) {
	let mixingRules = mixingRulesList[m];
	for (let i = 0; i < connectionsList.length; ++i, ++testNumber) {
	scheduleTest(
	testNumber, connectionsList[i], mixingRules.channelCount,
	mixingRules.channelCountMode,
	mixingRules.channelInterpretation);
	}
	}

	// Render then check results.
	// context.oncomplete = checkResult;
	context.startRendering().then(buffer => {
	checkResult(buffer, should);
	task.done();
	});
	;
	});

	audit.run();
	</script>
	</body>
	</html>