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| 1 <!DOCTYPE html> | |
| 2 <html> | |
| 3 | |
| 4 <head> | |
| 5 <script src="../resources/js-test.js"></script> | |
| 6 <script src="resources/compatibility.js"></script> | |
| 7 <script src="resources/audit-util.js"></script> | |
| 8 <script src="resources/audio-testing.js"></script> | |
| 9 </head> | |
| 10 | |
| 11 <body> | |
| 12 <script> | |
| 13 description('Test disconnect() method on AudioParam destination.'); | |
| 14 window.jsTestIsAsync = true; | |
| 15 | |
| 16 var renderQuantum = 128; | |
| 17 | |
| 18 var sampleRate = 44100; | |
| 19 var renderDuration = 0.5; | |
| 20 var disconnectTime = 0.5 * renderDuration; | |
| 21 | |
| 22 var audit = Audit.createTaskRunner(); | |
| 23 | |
| 24 // Calculate the index for disconnection. | |
| 25 function getDisconnectIndex(disconnectTime) { | |
| 26 var disconnectIndex = disconnectTime * sampleRate; | |
| 27 return disconnectIndex -= (disconnectIndex) % renderQuantum; | |
| 28 } | |
| 29 | |
| 30 // Get the index of value change. | |
| 31 function getValueChangeIndex(array, targetValue) { | |
| 32 return array.findIndex(function (element, index) { | |
| 33 if (element === targetValue) | |
| 34 return true; | |
| 35 }); | |
| 36 } | |
| 37 | |
| 38 // Task 1: test disconnect(AudioParam) method. | |
| 39 audit.defineTask('disconnect(AudioParam)', function (done) { | |
| 40 | |
| 41 // Creates a buffer source with value [1] and then connect it to two gain | |
| 42 // nodes in series. The output of the buffer source is lowered by half | |
| 43 // (* 0.5) and then connected to two |.gain| AudioParams in each gain node
. | |
| 44 // | |
| 45 // (1) bufferSource => gain1 => gain2 | |
| 46 // (2) bufferSource => half => gain1.gain | |
| 47 // (3) half => gain2.gain | |
| 48 // | |
| 49 // This graph should produce the output of 2.25 (= 1 * 1.5 * 1.5). After | |
| 50 // disconnecting (3), it should produce 1.5. | |
| 51 var context = new OfflineAudioContext(1, renderDuration * sampleRate, samp
leRate); | |
| 52 var source = context.createBufferSource(); | |
| 53 var buffer1ch = createConstantBuffer(context, 1, 1); | |
| 54 var half = context.createGain(); | |
| 55 var gain1 = context.createGain(); | |
| 56 var gain2 = context.createGain(); | |
| 57 | |
| 58 source.buffer = buffer1ch; | |
| 59 source.loop = true; | |
| 60 half.gain.value = 0.5; | |
| 61 | |
| 62 source.connect(gain1); | |
| 63 gain1.connect(gain2); | |
| 64 gain2.connect(context.destination); | |
| 65 source.connect(half); | |
| 66 | |
| 67 // Connecting |half| to both |gain1.gain| and |gain2.gain| amplifies the | |
| 68 // signal by 2.25 (= 1.5 * 1.5) because each gain node amplifies the signa
l | |
| 69 // by 1.5 (= 1.0 + 0.5). | |
| 70 half.connect(gain1.gain); | |
| 71 half.connect(gain2.gain); | |
| 72 | |
| 73 source.start(); | |
| 74 | |
| 75 // Schedule the disconnection at the half of render duration. | |
| 76 context.suspend(disconnectTime).then(function () { | |
| 77 half.disconnect(gain2.gain); | |
| 78 context.resume(); | |
| 79 }); | |
| 80 | |
| 81 context.startRendering().then(function (buffer) { | |
| 82 var channelData = buffer.getChannelData(0); | |
| 83 var disconnectIndex = getDisconnectIndex(disconnectTime); | |
| 84 var valueChangeIndex = getValueChangeIndex(channelData, 1.5); | |
| 85 | |
| 86 // Expected values are: 1 * 1.5 * 1.5 -> 1 * 1.5 = [2.25, 1.5] | |
| 87 Should('Channel #0', channelData).containValues([2.25, 1.5]); | |
| 88 Should('The index of value change', valueChangeIndex) | |
| 89 .beEqualTo(disconnectIndex); | |
| 90 | |
| 91 }).then(done); | |
| 92 }); | |
| 93 | |
| 94 // Task 2: test disconnect(AudioParam, output) method. | |
| 95 audit.defineTask('disconnect(AudioParam, output)', function (done) { | |
| 96 | |
| 97 // Create a 2-channel buffer source with [1, 2] in each channel and | |
| 98 // make a serial connection through gain1 and gain 2. The make the buffer | |
| 99 // source half with a gain node and connect it to a 2-output splitter. | |
| 100 // Connect each output to 2 gain AudioParams respectively. | |
| 101 // | |
| 102 // (1) bufferSource => gain1 => gain2 | |
| 103 // (2) bufferSource => half => splitter(2) | |
| 104 // (3) splitter#0 => gain1.gain | |
| 105 // (4) splitter#1 => gain2.gain | |
| 106 // | |
| 107 // This graph should produce 3 (= 1 * 1.5 * 2) and 6 (= 2 * 1.5 * 2) for | |
| 108 // each channel. After disconnecting (4), it should output 1.5 and 3. | |
| 109 var context = new OfflineAudioContext(2, renderDuration * sampleRate, samp
leRate); | |
| 110 var source = context.createBufferSource(); | |
| 111 var buffer2ch = createConstantBuffer(context, 1, [1, 2]); | |
| 112 var splitter = context.createChannelSplitter(2); | |
| 113 var half = context.createGain(); | |
| 114 var gain1 = context.createGain(); | |
| 115 var gain2 = context.createGain(); | |
| 116 | |
| 117 source.buffer = buffer2ch; | |
| 118 source.loop = true; | |
| 119 half.gain.value = 0.5; | |
| 120 | |
| 121 source.connect(gain1); | |
| 122 gain1.connect(gain2); | |
| 123 gain2.connect(context.destination); | |
| 124 | |
| 125 // |source| originally is [1, 2] but it becomes [0.5, 1] after 0.5 gain. | |
| 126 // Each splitter's output will be applied to |gain1.gain| and |gain2.gain| | |
| 127 // respectively in an additive fashion. | |
| 128 source.connect(half); | |
| 129 half.connect(splitter); | |
| 130 | |
| 131 // This amplifies the signal by 1.5. (= 1.0 + 0.5) | |
| 132 splitter.connect(gain1.gain, 0); | |
| 133 | |
| 134 // This amplifies the signal by 2. (= 1.0 + 1.0) | |
| 135 splitter.connect(gain2.gain, 1); | |
| 136 | |
| 137 source.start(); | |
| 138 | |
| 139 // Schedule the disconnection at the half of render duration. | |
| 140 context.suspend(disconnectTime).then(function () { | |
| 141 splitter.disconnect(gain2.gain, 1); | |
| 142 context.resume(); | |
| 143 }); | |
| 144 | |
| 145 context.startRendering().then(function (buffer) { | |
| 146 var channelData0 = buffer.getChannelData(0); | |
| 147 var channelData1 = buffer.getChannelData(1); | |
| 148 | |
| 149 var disconnectIndex = getDisconnectIndex(disconnectTime); | |
| 150 var valueChangeIndexCh0 = getValueChangeIndex(channelData0, 1.5); | |
| 151 var valueChangeIndexCh1 = getValueChangeIndex(channelData1, 3); | |
| 152 | |
| 153 // Expected values are: 1 * 1.5 * 2 -> 1 * 1.5 = [3, 1.5] | |
| 154 Should('Channel #0', channelData0).containValues([3, 1.5]); | |
| 155 Should('The index of value change in channel #0', valueChangeIndexCh0) | |
| 156 .beEqualTo(disconnectIndex); | |
| 157 | |
| 158 // Expected values are: 2 * 1.5 * 2 -> 2 * 1.5 = [6, 3] | |
| 159 Should('Channel #1', channelData1).containValues([6, 3]); | |
| 160 Should('The index of value change in channel #1', valueChangeIndexCh1) | |
| 161 .beEqualTo(disconnectIndex); | |
| 162 | |
| 163 }).then(done); | |
| 164 }); | |
| 165 | |
| 166 // Task 3: exception checks. | |
| 167 audit.defineTask('exceptions', function (done) { | |
| 168 var context = new AudioContext(); | |
| 169 var gain1 = context.createGain(); | |
| 170 var splitter = context.createChannelSplitter(2); | |
| 171 var gain2 = context.createGain(); | |
| 172 var gain3 = context.createGain(); | |
| 173 | |
| 174 // Connect a splitter to gain nodes and merger so we can test the possible | |
| 175 // ways of disconnecting the nodes to verify that appropriate exceptions | |
| 176 // are thrown. | |
| 177 gain1.connect(splitter); | |
| 178 splitter.connect(gain2.gain, 0); | |
| 179 splitter.connect(gain3.gain, 1); | |
| 180 gain2.connect(gain3); | |
| 181 gain3.connect(context.destination); | |
| 182 | |
| 183 // gain1 is not connected to gain3.gain. Exception should be thrown. | |
| 184 Should('gain1.disconnect(gain3.gain)', function () { | |
| 185 gain1.disconnect(gain3.gain); | |
| 186 }).throw('InvalidAccessError'); | |
| 187 | |
| 188 // When the output index is good but the destination is invalid. | |
| 189 Should('splitter.disconnect(gain1.gain, 1)', function () { | |
| 190 splitter.disconnect(gain1.gain, 1); | |
| 191 }).throw('InvalidAccessError'); | |
| 192 | |
| 193 // When both arguments are wrong, throw IndexSizeError first. | |
| 194 Should('splitter.disconnect(gain1.gain, 2)', function () { | |
| 195 splitter.disconnect(gain1.gain, 2); | |
| 196 }).throw('IndexSizeError'); | |
| 197 | |
| 198 done(); | |
| 199 }); | |
| 200 | |
| 201 audit.defineTask('finish', function (done) { | |
| 202 finishJSTest(); | |
| 203 done(); | |
| 204 }); | |
| 205 | |
| 206 audit.runTasks( | |
| 207 'disconnect(AudioParam)', | |
| 208 'disconnect(AudioParam, output)', | |
| 209 'exceptions', | |
| 210 'finish' | |
| 211 ); | |
| 212 | |
| 213 successfullyParsed = true; | |
| 214 </script> | |
| 215 </body> | |
| 216 | |
| 217 </html> | |
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Chromium Code Reviews
Issue 2581463002:
Refactor WebAudio test directory (Closed)
