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| 1 <!DOCTYPE html> | |
| 2 | |
| 3 <!-- | |
| 4 Tests that AudioChannelSplitter works correctly. | |
| 5 --> | |
| 6 | |
| 7 <html> | |
| 8 <head> | |
| 9 <script src="../resources/js-test.js"></script> | |
| 10 <script src="resources/compatibility.js"></script> | |
| 11 <script src="resources/audit-util.js"></script> | |
| 12 <script src="resources/audio-testing.js"></script> | |
| 13 </head> | |
| 14 | |
| 15 <body> | |
| 16 | |
| 17 <div id="description"></div> | |
| 18 <div id="console"></div> | |
| 19 | |
| 20 <script> | |
| 21 description("Tests AudioChannelSplitter."); | |
| 22 | |
| 23 var sampleRate = 44100.0; | |
| 24 var lengthInSampleFrames = 512; | |
| 25 | |
| 26 var context = 0; | |
| 27 var sourceBuffer; | |
| 28 var sourceNode; | |
| 29 var channelSplitter; | |
| 30 var channelMerger; | |
| 31 | |
| 32 function createStereoBufferWithDCOffset(length, sampleRate, offset) { | |
| 33 var buffer = context.createBuffer(2, length, sampleRate); | |
| 34 var n = buffer.length; | |
| 35 var channelL = buffer.getChannelData(0); | |
| 36 var channelR = buffer.getChannelData(1); | |
| 37 | |
| 38 for (var i = 0; i < n; ++i) { | |
| 39 channelL[i] = offset; | |
| 40 channelR[i] = -1.0 * offset; | |
| 41 } | |
| 42 | |
| 43 return buffer; | |
| 44 } | |
| 45 | |
| 46 // checkResult() checks that the rendered buffer is stereo and that the left cha
nnel is all -1 and right channel all +1. | |
| 47 // In other words, we've reversed the order of the two channels. | |
| 48 function checkResult(event) { | |
| 49 var buffer = event.renderedBuffer; | |
| 50 | |
| 51 var success = true; | |
| 52 | |
| 53 if (buffer.numberOfChannels == 2) { | |
| 54 var bufferDataL = buffer.getChannelData(0); | |
| 55 var bufferDataR = buffer.getChannelData(1); | |
| 56 | |
| 57 // Go through every sample and make sure it's all -1 for the left-channe
l, and all +1 for the right-channel. | |
| 58 for (var i = 0; i < buffer.length; ++i) { | |
| 59 if (bufferDataL[i] != -1 || bufferDataR[i] != 1) { | |
| 60 success = false; | |
| 61 break; | |
| 62 } | |
| 63 } | |
| 64 } else { | |
| 65 success = false; | |
| 66 } | |
| 67 | |
| 68 if (success) { | |
| 69 testPassed("Correctly exchanged left and right channels."); | |
| 70 } else { | |
| 71 testFailed("Error on exchanging left and right channels."); | |
| 72 } | |
| 73 | |
| 74 finishJSTest(); | |
| 75 } | |
| 76 | |
| 77 function runTest() { | |
| 78 if (window.testRunner) { | |
| 79 testRunner.dumpAsText(); | |
| 80 testRunner.waitUntilDone(); | |
| 81 } | |
| 82 | |
| 83 window.jsTestIsAsync = true; | |
| 84 | |
| 85 // Create stereo offline audio context. | |
| 86 context = new OfflineAudioContext(2, lengthInSampleFrames, sampleRate); | |
| 87 | |
| 88 try { | |
| 89 var splitternode = context.createChannelSplitter(0); | |
| 90 testFailed("Exception should be thrown for numberOfOutputs <= 0."); | |
| 91 } catch(e) { | |
| 92 testPassed("Exception been thrown for numberOfOutputs <= 0."); | |
| 93 } | |
| 94 | |
| 95 try { | |
| 96 var splitternode = context.createChannelSplitter(33); | |
| 97 testFailed("Exception should be thrown for numerOfOutputs >= 32."); | |
| 98 } catch(e) { | |
| 99 testPassed("Exception been thrown for numberOfOutputs >= 32."); | |
| 100 } | |
| 101 | |
| 102 try { | |
| 103 var splitternode = context.createChannelSplitter(32); | |
| 104 testPassed("AudioChannelSplitter created successfully with numberOfOutpu
ts = 32."); | |
| 105 if (splitternode.numberOfOutputs === 32) | |
| 106 testPassed("AudioChannelSplitter has 32 outputs when it is created w
ith numberOfOutputs = 32."); | |
| 107 else | |
| 108 testFailed("AudioChannelSplitter should have 32 outputs when it is c
reated with numberOfOutputs = 32."); | |
| 109 | |
| 110 if (splitternode.numberOfInputs === 1) | |
| 111 testPassed("AudioChannelSplitter has one input."); | |
| 112 else | |
| 113 testFailed("AudioChannelSplitter should have one input."); | |
| 114 } catch(e) { | |
| 115 testFailed("Failed to create AudioChannelSplitter with numberOfInputs =
32."); | |
| 116 } | |
| 117 | |
| 118 try { | |
| 119 var splitternode = context.createChannelSplitter(); | |
| 120 testPassed("AudioChannelSplitter created successfully with empty paramet
er."); | |
| 121 if (splitternode.numberOfOutputs === 6) | |
| 122 testPassed("AudioChannelSplitter has 6 outputs when it is created wi
th empty parameter."); | |
| 123 else | |
| 124 testFailed("AudioChannelSplitter should have 6 outputs when it is cr
eated with empty parameter."); | |
| 125 | |
| 126 if (splitternode.toString().indexOf("ChannelSplitterNode") > -1) | |
| 127 testPassed("ChannelSplitterNode Object is available."); | |
| 128 else | |
| 129 testFailed("ChannelSplitterNode Object is not available."); | |
| 130 } catch(e) { | |
| 131 testFailed("Failed to create AudioChannelSplitter with empty parameter."
); | |
| 132 } | |
| 133 | |
| 134 // Create a stereo buffer, with all +1 values in left channel, all -1 in rig
ht channel. | |
| 135 sourceBuffer = createStereoBufferWithDCOffset(lengthInSampleFrames, sampleRa
te, 1); | |
| 136 | |
| 137 sourceNode = context.createBufferSource(); | |
| 138 sourceNode.buffer = sourceBuffer; | |
| 139 | |
| 140 // Create a channel splitter and connect it so that it split the stereo stre
am into two mono streams. | |
| 141 channelSplitter = context.createChannelSplitter(2); | |
| 142 sourceNode.connect(channelSplitter); | |
| 143 | |
| 144 // Create a channel merger to merge the output of channel splitter. | |
| 145 channelMerger = context.createChannelMerger(); | |
| 146 channelMerger.connect(context.destination); | |
| 147 | |
| 148 // When merging, exchange channel layout: left->right, right->left | |
| 149 channelSplitter.connect(channelMerger, 0, 1); | |
| 150 channelSplitter.connect(channelMerger, 1, 0); | |
| 151 | |
| 152 sourceNode.start(0); | |
| 153 | |
| 154 context.oncomplete = checkResult; | |
| 155 context.startRendering(); | |
| 156 } | |
| 157 | |
| 158 runTest(); | |
| 159 | |
| 160 </script> | |
| 161 | |
| 162 </body> | |
| 163 </html> | |
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Chromium Code Reviews
Issue 2581463002:
Refactor WebAudio test directory (Closed)
