| <!DOCTYPE html> |
| <html> |
| <head> |
| <title> |
| automatic-pull-node.html |
| </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"> |
| // This test verifies that the AudioBasicInspectorNode based nodes work |
| // correctly |
| |
| let audit = Audit.createTaskRunner(); |
| |
| let 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. |
| let renderLengthInFrames = 256; |
| let fftSize = 64; |
| |
| let audioDataOne = 255; // Audio data 1.0 in Uint8 format will be 255. |
| let audioDataZero = 128; // Audio data 0 in Uint8 format will be 128. |
| |
| let context; |
| let constantBuffer; |
| let bufferSource; |
| let analyser; |
| |
| function constructCommonGraph() { |
| // Create offline audio context. |
| context = new OfflineAudioContext(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(should) { |
| let timeDomainData = new Uint8Array(fftSize); |
| analyser.getByteTimeDomainData(timeDomainData); |
| |
| should( |
| timeDomainData[0] >= audioDataOne, |
| 'RealtimeAnalyserNode got pulled when connected from upstream node but not to downstream node') |
| .beTrue(); |
| } |
| |
| // 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. |
| audit.define('test1', function(task, should) { |
| constructCommonGraph(); |
| |
| bufferSource.start(0); |
| |
| context.startRendering() |
| .then(function() { |
| test1Finished(should); |
| }) |
| .then(task.done.bind(task)); |
| }); |
| |
| function test2Finished(should) { |
| let timeDomainData = new Uint8Array(fftSize); |
| analyser.getByteTimeDomainData(timeDomainData); |
| |
| should( |
| timeDomainData[0] >= audioDataOne, |
| 'RealtimeAnalyserNode got pulled when connected from upstream node and to destination node') |
| .beTrue(); |
| } |
| |
| // 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. |
| audit.define('test2', function(task, should) { |
| constructCommonGraph(); |
| |
| analyser.connect(context.destination); |
| |
| bufferSource.start(0); |
| |
| context.startRendering() |
| .then(function() { |
| test2Finished(should); |
| }) |
| .then(task.done.bind(task)); |
| }); |
| |
| function test3Finished(should) { |
| let timeDomainData = new Uint8Array(fftSize); |
| analyser.getByteTimeDomainData(timeDomainData); |
| |
| // If realtimeAnalyser hasn't pulled any data, the data in buffer will |
| // be 0. |
| should( |
| timeDomainData[0] == audioDataZero, |
| 'RealtimeAnalyserNode didn\'t get pulled when it should not') |
| .beTrue(); |
| ; |
| } |
| |
| // To verify the realtimeAnalyser will stop pulling if it is connected to |
| // a downstream node which is not ultimatly connected to any audio |
| // destination. |
| audit.define('test3', function(task, should) { |
| constructCommonGraph(); |
| |
| let gain = context.createGain(); |
| analyser.connect(gain); |
| |
| bufferSource.start(0); |
| |
| context.startRendering() |
| .then(function() { |
| test3Finished(should); |
| }) |
| .then(task.done.bind(task)); |
| }); |
| |
| audit.run(); |
| </script> |
| </body> |
| </html> |
