| <!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.start(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.start(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.createGain(); |
| analyser.connect(gain); |
| |
| bufferSource.start(0); |
| |
| context.oncomplete = test3Finished; |
| context.startRendering(); |
| } |
| |
| function runTest() { |
| window.jsTestIsAsync = true; |
| |
| test1(); |
| } |
| |
| runTest(); |
| |
| </script> |
| </body> |
| </html> |
