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| (Empty) | |
| 1 <!doctype html> |
| 2 <html> |
| 3 |
| 4 <head> |
| 5 <title>Test webm Decoding</title> |
| 6 <script src="../../../resources/testharness.js"></script> |
| 7 <script src="../../../resources/testharnessreport.js"></script> |
| 8 <script src="../../resources/audit-util.js"></script> |
| 9 <script src="../../resources/audit.js"></script> |
| 10 <script src="../../resources/buffer-loader.js"></script> |
| 11 </head> |
| 12 |
| 13 <body> |
| 14 <script> |
| 15 let audit = Audit.createTaskRunner(); |
| 16 let decodedAudio; |
| 17 let expectedAudio; |
| 18 |
| 19 audit.define('test', function(task, should) { |
| 20 task.describe('Test webm decoding'); |
| 21 |
| 22 let context = new AudioContext(); |
| 23 |
| 24 let bufferLoader = new BufferLoader( |
| 25 context, ['webm-decode-expected.wav', 'test-webm.webm'], |
| 26 function(bufferList) { |
| 27 expectedAudio = bufferList[0]; |
| 28 decodedAudio = bufferList[1]; |
| 29 |
| 30 // Verify that we have the right number of channels and frames. |
| 31 should(decodedAudio.numberOfChannels, 'Number of channels') |
| 32 .beEqualTo(expectedAudio.numberOfChannels); |
| 33 should(decodedAudio.length, 'Decoded number of frames') |
| 34 .beEqualTo(expectedAudio.length); |
| 35 |
| 36 // Verify that the actual data matches the expected data very |
| 37 // closely. |
| 38 for (let c = 0; c < expectedAudio.numberOfChannels; ++c) { |
| 39 let snrdB = 10 * |
| 40 Math.log10(computeSNR( |
| 41 decodedAudio.getChannelData(c), |
| 42 expectedAudio.getChannelData(c))); |
| 43 should(snrdB, 'SNR between actual expected channel ' + c) |
| 44 .beGreaterThanOrEqualTo(109.56); |
| 45 should(decodedAudio.getChannelData(c), 'Decoded channel ' + c) |
| 46 .beCloseToArray( |
| 47 expectedAudio.getChannelData(c), |
| 48 {absoluteThreshold: 4.0234e-5}); |
| 49 } |
| 50 |
| 51 task.done(); |
| 52 }); |
| 53 |
| 54 bufferLoader.load(); |
| 55 }); |
| 56 |
| 57 audit.run(); |
| 58 </script> |
| 59 </body> |
| 60 |
| 61 </html> |
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Chromium Code Reviews
Issue 2655783004:
Decode entire in-memory file for WebAudio (Closed)
