| <!DOCTYPE html> |
| <html> |
| <head> |
| <title> |
| panner-equalpower.html |
| </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> |
| <script src="../../resources/panner-model-testing.js"></script> |
| </head> |
| <body> |
| <script id="layout-test-code"> |
| let audit = Audit.createTaskRunner(); |
| |
| // To test the panner, we create a number of panner nodes |
| // equally spaced on a semicircle at unit distance. The |
| // semicircle covers the azimuth range from -90 to 90 deg, |
| // covering full left to full right. Each source is an impulse |
| // turning at a different time and we check that the rendered |
| // impulse has the expected gain. |
| audit.define( |
| { |
| label: 'test', |
| description: 'Equal-power panner model of AudioPannerNode', |
| }, |
| (task, should) => { |
| // Create offline audio context. |
| context = new OfflineAudioContext( |
| 2, sampleRate * renderLengthSeconds, sampleRate); |
| |
| createTestAndRun( |
| context, should, nodesToCreate, 1, |
| function(panner, x, y, z) { |
| panner.setPosition(x, y, z); |
| }) |
| .then(() => task.done()); |
| ; |
| }); |
| |
| // Test that a mono source plays out on both the left and right channels |
| // when the source and listener positions are the same. |
| audit.define( |
| { |
| label: 'mono source=listener', |
| description: 'Source and listener at the same position' |
| }, |
| (task, should) => { |
| // Must be stereo to verify output and only need a short duration |
| let context = |
| new OfflineAudioContext(2, 0.25 * sampleRate, sampleRate); |
| |
| // Arbitrary position for source and listener. Just so we don't use |
| // defaults positions. |
| let x = 1; |
| let y = 2; |
| let z = 3; |
| |
| context.listener.setPosition(x, y, z); |
| |
| let src = new OscillatorNode(context); |
| let panner = new PannerNode(context, { |
| panningModel: 'equalpower', |
| positionX: x, |
| positionY: y, |
| positionZ: z |
| }); |
| |
| src.connect(panner).connect(context.destination); |
| |
| src.start(); |
| |
| context.startRendering() |
| .then(renderedBuffer => { |
| // Verify that both channels have the same data because they |
| // should when the source and listener are at the same |
| // position |
| let c0 = renderedBuffer.getChannelData(0); |
| let c1 = renderedBuffer.getChannelData(1); |
| should(c0, 'Mono: Left and right channels').beEqualToArray(c1); |
| }) |
| .then(() => task.done()); |
| }); |
| |
| // Test that a stereo source plays out on both the left and right channels |
| // when the source and listener positions are the same. |
| audit.define( |
| { |
| label: 'stereo source=listener', |
| description: 'Source and listener at the same position' |
| }, |
| (task, should) => { |
| // Must be stereo to verify output and only need a short duration. |
| let context = |
| new OfflineAudioContext(2, 0.25 * sampleRate, sampleRate); |
| |
| // Arbitrary position for source and listener. Just so we don't use |
| // defaults positions. |
| let x = 1; |
| let y = 2; |
| let z = 3; |
| |
| context.listener.setPosition(x, y, z); |
| |
| let src = new OscillatorNode(context); |
| let merger = new ChannelMergerNode(context, {numberOfInputs: 2}); |
| let panner = new PannerNode(context, { |
| panningModel: 'equalpower', |
| positionX: x, |
| positionY: y, |
| positionZ: z |
| }); |
| |
| // Make the oscillator a stereo signal (with identical signals on |
| // each channel). |
| src.connect(merger, 0, 0); |
| src.connect(merger, 0, 1); |
| |
| merger.connect(panner).connect(context.destination); |
| |
| src.start(); |
| |
| context.startRendering() |
| .then(renderedBuffer => { |
| // Verify that both channels have the same data because they |
| // should when the source and listener are at the same |
| // position. |
| let c0 = renderedBuffer.getChannelData(0); |
| let c1 = renderedBuffer.getChannelData(1); |
| should(c0, 'Stereo: Left and right channels').beEqualToArray(c1); |
| }) |
| .then(() => task.done()); |
| }); |
| |
| audit.run(); |
| </script> |
| </body> |
| </html> |
