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| 1 <!doctype html> | 1 <!doctype html> |
| 2 <html> | 2 <html> |
| 3 <head> | 3 <head> |
| 4 <script src="../../resources/testharness.js"></script> | 4 <script src="../../resources/testharness.js"></script> |
| 5 <script src="../../resources/testharnessreport.js"></script> | 5 <script src="../../resources/testharnessreport.js"></script> |
| 6 <script src="../resources/audit-util.js"></script> | 6 <script src="../resources/audit-util.js"></script> |
| 7 <script src="../resources/audio-testing.js"></script> | 7 <script src="../resources/audit.js"></script> |
| 8 <title>Test Analyser.getByteTimeDomainData()</title> | 8 <title>Test Analyser.getByteTimeDomainData()</title> |
| 9 </head> | 9 </head> |
| 10 | 10 |
| 11 <body> | 11 <body> |
| 12 <script> | 12 <script> |
| 13 var sampleRate = 48000; | 13 var sampleRate = 48000; |
| 14 // The size of the analyser frame. Anything larger than 128 is ok, but sh
ould be long enough | 14 // The size of the analyser frame. Anything larger than 128 is ok, but sh
ould be long enough |
| 15 // to capture the peaks of the oscillator waveform. | 15 // to capture the peaks of the oscillator waveform. |
| 16 var fftSize = 256; | 16 var fftSize = 256; |
| 17 // Number of frames to render. Should be greater than the fftSize, but is
otherwise | 17 // Number of frames to render. Should be greater than the fftSize, but is
otherwise |
| 18 // arbitrary. | 18 // arbitrary. |
| 19 var renderFrames = 2 * fftSize; | 19 var renderFrames = 2 * fftSize; |
| 20 | 20 |
| 21 var audit = Audit.createTaskRunner(); | 21 var audit = Audit.createTaskRunner(); |
| 22 | 22 |
| 23 // Test that getByteTimeDomainData returns the correct values. This test
depends on | 23 // Test that getByteTimeDomainData returns the correct values. This test
depends on |
| 24 // getFloatTimeDomainData returning the correct data (for which there is a
lready a test). | 24 // getFloatTimeDomainData returning the correct data (for which there is a
lready a test). |
| 25 audit.defineTask("byte-data", function (done) { | 25 audit.define("byte-data", (task, should) => { |
| 26 var context = new OfflineAudioContext(1, renderFrames, sampleRate); | 26 var context = new OfflineAudioContext(1, renderFrames, sampleRate); |
| 27 | 27 |
| 28 // Create a sawtooth as the signal under test. A sine wave or triangle
wave would probably | 28 // Create a sawtooth as the signal under test. A sine wave or triangle
wave would probably |
| 29 // also work. | 29 // also work. |
| 30 var src = context.createOscillator(); | 30 var src = context.createOscillator(); |
| 31 src.type = "sawtooth"; | 31 src.type = "sawtooth"; |
| 32 // Choose a frequency high enough that we get at least a full period in
one analyser fftSize | 32 // Choose a frequency high enough that we get at least a full period in
one analyser fftSize |
| 33 // frame. Otherwise, the frequency is arbitrary. | 33 // frame. Otherwise, the frequency is arbitrary. |
| 34 src.frequency.value = 440; | 34 src.frequency.value = 440; |
| 35 | 35 |
| (...skipping 26 matching lines...) Expand all Loading... |
| 62 var value = Math.fround(128 * Math.fround(1 + floatData[k])); | 62 var value = Math.fround(128 * Math.fround(1 + floatData[k])); |
| 63 // Clip the result to lie in the range [0, 255]. | 63 // Clip the result to lie in the range [0, 255]. |
| 64 expected[k] = Math.floor(Math.min(255, Math.max(0, value))); | 64 expected[k] = Math.floor(Math.min(255, Math.max(0, value))); |
| 65 } | 65 } |
| 66 | 66 |
| 67 // Find the first index of the first sample that exceeds +1 or -1. Th
e test MUST have at | 67 // Find the first index of the first sample that exceeds +1 or -1. Th
e test MUST have at |
| 68 // least one such value. | 68 // least one such value. |
| 69 var indexMax = floatData.findIndex(function (x) { return x > 1; }); | 69 var indexMax = floatData.findIndex(function (x) { return x > 1; }); |
| 70 var indexMin = floatData.findIndex(function (x) { return x < -1; }); | 70 var indexMin = floatData.findIndex(function (x) { return x < -1; }); |
| 71 | 71 |
| 72 Should("Index of first sample greater than +1", indexMax, { | 72 should(indexMax, "Index of first sample greater than +1").beGreaterTha
nOrEqualTo(0); |
| 73 brief: true | 73 should(indexMin, "Index of first sample less than -1").beGreaterThanOr
EqualTo(0); |
| 74 }).beGreaterThanOrEqualTo(0); | |
| 75 Should("Index of first sample less than -1", indexMin, { | |
| 76 brief: true | |
| 77 }).beGreaterThanOrEqualTo(0); | |
| 78 | 74 |
| 79 // Verify explicitly that clipping happened correctly at the above ind
ices. | 75 // Verify explicitly that clipping happened correctly at the above ind
ices. |
| 80 Should("Clip " + floatData[indexMax].toPrecision(6) + ": byteData[" +
indexMax + "]", | 76 should( |
| 81 byteData[indexMax]).beEqualTo(255); | 77 byteData[indexMax], |
| 82 Should("Clip " + floatData[indexMin].toPrecision(6) + ": byteData[" +
indexMin + "]", | 78 "Clip " + floatData[indexMax].toPrecision(6) + ": byteData[" + |
| 83 byteData[indexMin]).beEqualTo(0); | 79 indexMax + "]").beEqualTo(255); |
| 80 should( |
| 81 byteData[indexMin], |
| 82 "Clip " + floatData[indexMin].toPrecision(6) + ": byteData[" + |
| 83 indexMin + "]").beEqualTo(0); |
| 84 | 84 |
| 85 // Verify that all other samples are computed correctly. | 85 // Verify that all other samples are computed correctly. |
| 86 Should("Byte data", byteData).beEqualToArray(expected); | 86 should(byteData, "Byte data").beEqualToArray(expected); |
| 87 }).then(context.resume.bind(context)) | 87 }).then(context.resume.bind(context)) |
| 88 | 88 |
| 89 src.start(); | 89 src.start(); |
| 90 context.startRendering().then(done); | 90 context.startRendering().then(() => task.done()); |
| 91 }); | 91 }); |
| 92 | 92 |
| 93 audit.defineTask("finish", function (done) { | 93 audit.run(); |
| 94 done(); | |
| 95 }); | |
| 96 | |
| 97 audit.runTasks(); | |
| 98 </script> | 94 </script> |
| 99 </body> | 95 </body> |
| 100 </html> | 96 </html> |
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Chromium Code Reviews
Issue 2777983002:
Convert Analyser tests to use new Audit. (Closed)
