Chromium Code Reviews Chromium Code Reviews
Issue 2671883002:
Convert GainNode tests to testharness (Closed)
| OLD | NEW |
|---|---|
| 1 <!DOCTYPE html> | 1 <!DOCTYPE html> |
| 2 | 2 |
| 3 <!-- | 3 <!-- |
| 4 Tests that GainNode is properly scaling the gain. | 4 Tests that GainNode is properly scaling the gain. |
| 5 We'll render 11 notes, starting at a gain of 1.0, decreasing in gain by 0.1. | 5 We'll render 11 notes, starting at a gain of 1.0, decreasing in gain by 0.1. |
| 6 The 11th note will be of gain 0.0, so it should be silent (at the end in the ren dered output). | 6 The 11th note will be of gain 0.0, so it should be silent (at the end in the ren dered output). |
| 7 --> | 7 --> |
| 8 | 8 |
| 9 <html> | 9 <html> |
| 10 <head> | 10 <head> |
| 11 <script src="../../resources/testharness.js"></script> | |
| 12 <script src="../../resources/testharnessreport.js"></script> | |
| 11 <script src="../resources/audit-util.js"></script> | 13 <script src="../resources/audit-util.js"></script> |
| 12 <script src="../resources/audio-testing.js"></script> | 14 <script src="../resources/audit.js"></script> |
| 13 | 15 <script src="../resources/buffer-loader.js"></script> |
| 14 </head> | 16 </head> |
| 15 <body> | 17 <body> |
| 16 | 18 |
| 17 <script> | 19 <script> |
| 20 let audit = Audit.createTaskRunner(); | |
| 18 | 21 |
| 19 window.onload = init; | 22 let sampleRate = 44100.0; |
| 23 let bufferDurationSeconds = 0.125; | |
| 24 let numberOfNotes = 11; | |
| 25 let noteSpacing = | |
| 26 bufferDurationSeconds + 0.020; // leave 20ms of silence between each "note" | |
| 27 let lengthInSeconds = numberOfNotes * noteSpacing; | |
| 20 | 28 |
| 21 var sampleRate = 44100.0; | 29 let context = 0; |
| 22 var bufferDurationSeconds = 0.125; | 30 let sinWaveBuffer = 0; |
| 23 var numberOfNotes = 11; | 31 let reference = 0; |
| 24 var noteSpacing = bufferDurationSeconds + 0.020; // leave 20ms of silence betwee n each "note" | |
| 25 var lengthInSeconds = numberOfNotes * noteSpacing; | |
| 26 | |
| 27 var context = 0; | |
| 28 var sinWaveBuffer = 0; | |
| 29 | 32 |
| 30 function createSinWaveBuffer(lengthInSeconds, frequency) { | 33 function createSinWaveBuffer(lengthInSeconds, frequency) { |
| 31 var audioBuffer = context.createBuffer(2, lengthInSeconds * sampleRate, samp leRate); | 34 let audioBuffer = |
| 35 context.createBuffer(2, lengthInSeconds * sampleRate, sampleRate); | |
| 32 | 36 |
| 33 var n = audioBuffer.length; | 37 let n = audioBuffer.length; |
| 34 var channelL = audioBuffer.getChannelData(0); | 38 let channelL = audioBuffer.getChannelData(0); |
| 35 var channelR = audioBuffer.getChannelData(1); | 39 let channelR = audioBuffer.getChannelData(1); |
| 36 | 40 |
| 37 for (var i = 0; i < n; ++i) { | 41 for (let i = 0; i < n; ++i) { |
| 38 channelL[i] = Math.sin(frequency * 2.0*Math.PI * i / sampleRate); | 42 channelL[i] = Math.sin(frequency * 2.0 * Math.PI * i / sampleRate); |
| 39 channelR[i] = channelL[i]; | 43 channelR[i] = channelL[i]; |
| 40 } | 44 } |
| 41 | 45 |
| 42 return audioBuffer; | 46 return audioBuffer; |
| 43 } | 47 } |
| 44 | 48 |
| 45 function playNote(time, gain) { | 49 function playNote(time, gain) { |
| 46 var source = context.createBufferSource(); | 50 let source = context.createBufferSource(); |
| 47 source.buffer = sinWaveBuffer; | 51 source.buffer = sinWaveBuffer; |
| 48 | 52 |
| 49 var gainNode = context.createGain(); | 53 let gainNode = context.createGain(); |
| 50 gainNode.gain.value = gain; | 54 gainNode.gain.value = gain; |
| 51 | 55 |
| 52 source.connect(gainNode); | 56 source.connect(gainNode); |
| 53 gainNode.connect(context.destination); | 57 gainNode.connect(context.destination); |
| 54 | 58 |
| 55 source.start(time); | 59 source.start(time); |
| 56 } | 60 } |
| 57 | 61 |
| 58 function init() { | 62 audit.define('create context', function(task, should) { |
| 59 if (!window.testRunner) | 63 task.describe('Create context for test'); |
| 60 return; | 64 // Create offline audio context. |
| 65 context = | |
| 66 new OfflineAudioContext(2, sampleRate * lengthInSeconds, sampleRate); | |
| 67 task.done(); | |
| 68 }); | |
| 61 | 69 |
| 62 // Create offline audio context. | 70 audit.define('load-ref', function(task, should) { |
| 63 context = new OfflineAudioContext(2, sampleRate * lengthInSeconds, sampleRat e); | 71 task.describe('Load reference audio file'); |
| 72 let bufferLoader = | |
| 73 new BufferLoader(context, ['gain-expected.wav'], bufferList => { | |
| 74 reference = bufferList[0].getChannelData(0); | |
| 75 task.done(); | |
| 76 }); | |
| 64 | 77 |
| 65 // Create a buffer for a short "note". | 78 bufferLoader.load(); |
| 66 sinWaveBuffer = createSinWaveBuffer(bufferDurationSeconds, 880.0); | 79 }); |
| 67 | 80 |
| 68 // Render 11 notes, starting at a gain of 1.0, decreasing in gain by 0.1. | 81 audit.define('test', function(task, should) { |
| 69 // The last note will be of gain 0.0, so shouldn't be perceptible in the ren dered output. | 82 task.describe('GainNode functionality'); |
| 70 for (var i = 0; i < numberOfNotes; ++i) { | |
| 71 var time = i * noteSpacing; | |
| 72 var gain = 1.0 - i / (numberOfNotes - 1); | |
| 73 playNote(time, gain); | |
| 74 } | |
| 75 | 83 |
| 76 context.oncomplete = finishAudioTest; | 84 // Create a buffer for a short "note". |
| 77 context.startRendering(); | 85 sinWaveBuffer = createSinWaveBuffer(bufferDurationSeconds, 880.0); |
| 78 | 86 |
| 79 testRunner.waitUntilDone(); | 87 // Render 11 notes, starting at a gain of 1.0, decreasing in gain by 0.1. |
| 80 } | 88 // The last note will be of gain 0.0, so shouldn't be perceptible in the |
| 89 // rendered output. | |
| 90 for (let i = 0; i < numberOfNotes; ++i) { | |
| 91 let time = i * noteSpacing; | |
| 92 let gain = 1.0 - i / (numberOfNotes - 1); | |
| 93 playNote(time, gain); | |
| 94 } | |
| 81 | 95 |
| 96 context.startRendering() | |
| 97 .then(buffer => { | |
| 98 let actual = buffer.getChannelData(0); | |
| 99 should(actual, 'Output from gain node').beCloseToArray(reference, { | |
| 100 absoluteThreshold: 3.0503e-5 | |
| 101 }); | |
| 102 let snr = 10 * Math.log10(computeSNR(actual, reference)); | |
| 103 should(snr, 'SNR (in dB)').beGreaterThanOrEqualTo(89.088); | |
| 104 }) | |
| 105 .then(task.done.bind(task)); | |
|
hongchan
2017/02/06 17:34:28
task => task.done()
| |
| 106 ; | |
| 107 }); | |
| 108 | |
| 109 audit.run(); | |
| 82 </script> | 110 </script> |
| 83 | 111 |
| 84 </body> | 112 </body> |
| 85 </html> | 113 </html> |
| OLD | NEW |
