| <!DOCTYPE html> |
| <!-- |
| Test AudioBufferSourceNode supports 5.1 channel. |
| --> |
| <html> |
| <head> |
| <title> |
| audiobuffersource-multi-channels.html |
| </title> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script src="/webaudio/resources/audit-util.js"></script> |
| <script src="/webaudio/resources/audit.js"></script> |
| <script src="/webaudio/resources/mix-testing.js"></script> |
| </head> |
| <body> |
| <script id="layout-test-code"> |
| let audit = Audit.createTaskRunner(); |
| let context; |
| let expectedAudio; |
| |
| audit.define('initialize', (task, should) => { |
| // Create offline audio context |
| let sampleRate = 44100.0; |
| should(() => { |
| context = new OfflineAudioContext( |
| 6, sampleRate * toneLengthSeconds, sampleRate); |
| }, 'Creating context for testing').notThrow(); |
| should( |
| Audit |
| .loadFileFromUrl('resources/audiobuffersource-multi-channels-expected.wav') |
| .then(arrayBuffer => { |
| context.decodeAudioData(arrayBuffer).then(audioBuffer => { |
| expectedAudio = audioBuffer; |
| task.done(); |
| }).catch(error => { |
| assert_unreached("Could not decode audio data due to " + error.message); |
| }) |
| }) |
| , 'Fetching expected audio').beResolved(); |
| }); |
| |
| audit.define( |
| {label: 'test', description: 'AudioBufferSource with 5.1 buffer'}, |
| (task, should) => { |
| let toneBuffer = |
| createToneBuffer(context, 440, toneLengthSeconds, 6); |
| |
| let source = context.createBufferSource(); |
| source.buffer = toneBuffer; |
| |
| source.connect(context.destination); |
| source.start(0); |
| |
| context.startRendering() |
| .then(renderedAudio => { |
| // Compute a threshold based on the maximum error, |maxUlp|, |
| // in ULP. This is experimentally determined. Assuming that |
| // the reference file is a 16-bit wav file, the max values in |
| // the wave file are +/- 32768. |
| let maxUlp = 1; |
| let threshold = maxUlp / 32768; |
| for (let k = 0; k < renderedAudio.numberOfChannels; ++k) { |
| should( |
| renderedAudio.getChannelData(k), |
| 'Rendered audio for channel ' + k) |
| .beCloseToArray( |
| expectedAudio.getChannelData(k), |
| {absoluteThreshold: threshold}); |
| } |
| }) |
| .then(() => task.done()); |
| }); |
| |
| audit.run(); |
| </script> |
| </body> |
| </html> |
