| <!doctype html> |
| <html> |
| <head> |
| <title>Panner Node Automation</title> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script src="../../resources/audit-util.js"></script> |
| <script src="../../resources/audit.js"></script> |
| </head> |
| |
| <body> |
| <script> |
| // Use a power-of-two to eliminate some round-off; otherwise, this isn't |
| // really important. |
| const sampleRate = 16384; |
| |
| // Render enough for the test; we don't need a lot. |
| const renderFrames = 2048; |
| |
| // Initial panner positionX and final positionX for listener. |
| const positionX = 2000; |
| |
| const audit = Audit.createTaskRunner(); |
| |
| // Test that listener.positionX.value setter does the right thing. |
| audit.define('Set Listener.positionX.value', (task, should) => { |
| const context = new OfflineAudioContext(2, renderFrames, sampleRate); |
| |
| createGraph(context); |
| |
| // Frame at which the listener instantaneously moves to a new location. |
| const moveFrame = 512; |
| |
| context.suspend(moveFrame / context.sampleRate) |
| .then(() => { |
| context.listener.positionX.value = positionX; |
| }) |
| .then(() => context.resume()); |
| |
| verifyOutput(context, moveFrame, should, 'listenr.positionX.value') |
| .then(() => task.done()); |
| }); |
| |
| // Test that listener.positionX.setValueAtTime() does the right thing. |
| audit.define('Listener.positionX.setValue', (task, should) => { |
| const context = new OfflineAudioContext(2, renderFrames, sampleRate); |
| |
| createGraph(context); |
| |
| // Frame at which the listener instantaneously moves to a new location. |
| const moveFrame = 512; |
| |
| context.listener.positionX.setValueAtTime( |
| positionX, moveFrame / context.sampleRate); |
| |
| verifyOutput( |
| context, moveFrame, should, 'listener.positionX.setValueATTime') |
| .then(() => task.done()); |
| }); |
| |
| // Test that listener.setPosition() does the right thing. |
| audit.define('Listener.setPosition', (task, should) => { |
| const context = new OfflineAudioContext(2, renderFrames, sampleRate); |
| |
| createGraph(context); |
| |
| // Frame at which the listener instantaneously moves to a new location. |
| const moveFrame = 512; |
| |
| context.suspend(moveFrame / context.sampleRate) |
| .then(() => { |
| context.listener.setPosition(positionX, 0, 0); |
| }) |
| .then(() => context.resume()); |
| |
| verifyOutput(context, moveFrame, should, 'listener.setPostion') |
| .then(() => task.done()); |
| }); |
| |
| audit.run(); |
| |
| |
| // Create the basic graph for testing which consists of an oscillator node |
| // connected to a panner node. |
| function createGraph(context) { |
| const listener = context.listener; |
| |
| listener.positionX.value = 0; |
| listener.positionY.value = 0; |
| listener.positionZ.value = 0; |
| |
| const src = new OscillatorNode(context); |
| |
| const panner = new PannerNode(context, { |
| distanceModel: 'linear', |
| refDistance: 1, |
| maxDistance: 3000, |
| positionX: positionX, |
| positionY: 0, |
| positionZ: 0 |
| }); |
| src.connect(panner).connect(context.destination); |
| |
| src.start(); |
| } |
| |
| |
| // Verify the output from the panner is correct. |
| function verifyOutput(context, moveFrame, should, prefix) { |
| return context.startRendering().then(resultBuffer => { |
| // Get the outputs (left and right) |
| const c0 = resultBuffer.getChannelData(0); |
| const c1 = resultBuffer.getChannelData(1); |
| |
| // The src/listener set up is such that audio should only come |
| // from the right for until |moveFrame|. Hence the left channel |
| // should be 0 (or very nearly 0). |
| const zero = new Float32Array(moveFrame); |
| |
| should( |
| c0.slice(0, moveFrame), `${prefix}: output0[0:${moveFrame - 1}]`) |
| .beCloseToArray(zero, {absoluteThreshold: 1e-16}); |
| should( |
| c1.slice(0, moveFrame), `${prefix}: output1[0:${moveFrame - 1}]`) |
| .notBeConstantValueOf(0); |
| |
| // At |moveFrame| and beyond, the listener and source are at the |
| // same position, so the outputs from the left and right should be |
| // identical, and the left channel should not be 0 anymore. |
| |
| should(c0.slice(moveFrame), `${prefix}: output0[${moveFrame}:]`) |
| .notBeConstantValueOf(0); |
| should(c1.slice(moveFrame), `${prefix}: output1[${moveFrame}:]`) |
| .beCloseToArray(c0.slice(moveFrame)); |
| }); |
| } |
| </script> |
| </body> |
| </html> |
| |
