| <!doctype html> |
| <html> |
| <head> |
| <title> |
| Test AudioParam Array Size |
| </title> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script src="/webaudio/resources/audit.js"></script> |
| <script src="/webaudio/resources/audit-util.js"></script> |
| </head> |
| |
| <body> |
| <script> |
| let audit = Audit.createTaskRunner(); |
| let filePath = 'processors/param-size-processor.js'; |
| let context; |
| |
| // Use a power of two so there's no roundoff computing times from frames. |
| let sampleRate = 16384; |
| |
| // Sets up AudioWorklet and OfflineAudioContext. |
| audit.define('Initializing AudioWorklet and Context', (task, should) => { |
| should(() => { |
| context = new OfflineAudioContext( |
| 1, 10 * RENDER_QUANTUM_FRAMES, sampleRate); |
| }, 'Creating offline context for testing').notThrow(); |
| |
| should( |
| context.audioWorklet.addModule(filePath), 'Creating test worklet') |
| .beResolved() |
| .then(() => { |
| task.done(); |
| }); |
| }); |
| |
| audit.define('Verify Size of AudioParam Arrays', (task, should) => { |
| let node = new AudioWorkletNode(context, 'param-size'); |
| let nodeParam = node.parameters.get('param'); |
| |
| node.connect(context.destination); |
| |
| let renderQuantumDuration = RENDER_QUANTUM_FRAMES / context.sampleRate; |
| |
| // Set up some automations, after one render quantum. We want the first |
| // render not to have any automations, just to be sure we handle that |
| // case correctly. |
| context.suspend(renderQuantumDuration) |
| .then(() => { |
| let now = context.currentTime; |
| |
| // Establish the first automation event. |
| nodeParam.setValueAtTime(1, now); |
| // The second render should be constant |
| nodeParam.setValueAtTime(0, now + renderQuantumDuration); |
| // The third render and part of the fourth is a linear ramp |
| nodeParam.linearRampToValueAtTime( |
| 1, now + 2.5 * renderQuantumDuration); |
| // Everything afterwards should be constant. |
| }) |
| .then(() => context.resume()); |
| |
| context.startRendering() |
| .then(renderedBuffer => { |
| let data = renderedBuffer.getChannelData(0); |
| |
| // The very first render quantum should be constant, so the array |
| // has length 1. |
| should( |
| data.slice(0, RENDER_QUANTUM_FRAMES), |
| 'Render quantum 0: array size') |
| .beConstantValueOf(1); |
| |
| should( |
| data.slice(RENDER_QUANTUM_FRAMES, 2 * RENDER_QUANTUM_FRAMES), |
| 'Render quantum 1: array size') |
| .beConstantValueOf(1); |
| |
| should( |
| data.slice( |
| 2 * RENDER_QUANTUM_FRAMES, 4 * RENDER_QUANTUM_FRAMES), |
| 'Render quantum 2-3: array size') |
| .beConstantValueOf(RENDER_QUANTUM_FRAMES); |
| |
| should( |
| data.slice(4 * RENDER_QUANTUM_FRAMES), |
| 'Remaining renders: array size') |
| .beConstantValueOf(1); |
| }) |
| .then(() => task.done()); |
| }); |
| |
| audit.run(); |
| </script> |
| </body> |
| </html> |
