diff options
| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 09:22:09 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 09:22:09 +0000 |
| commit | 43a97878ce14b72f0981164f87f2e35e14151312 (patch) | |
| tree | 620249daf56c0258faa40cbdcf9cfba06de2a846 /testing/web-platform/tests/webaudio/the-audio-api/the-waveshapernode-interface/waveshaper-limits.html | |
| parent | Initial commit. (diff) | |
| download | firefox-43a97878ce14b72f0981164f87f2e35e14151312.tar.xz firefox-43a97878ce14b72f0981164f87f2e35e14151312.zip | |
Adding upstream version 110.0.1.upstream/110.0.1upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'testing/web-platform/tests/webaudio/the-audio-api/the-waveshapernode-interface/waveshaper-limits.html')
| -rw-r--r-- | testing/web-platform/tests/webaudio/the-audio-api/the-waveshapernode-interface/waveshaper-limits.html | 110 |
1 files changed, 110 insertions, 0 deletions
diff --git a/testing/web-platform/tests/webaudio/the-audio-api/the-waveshapernode-interface/waveshaper-limits.html b/testing/web-platform/tests/webaudio/the-audio-api/the-waveshapernode-interface/waveshaper-limits.html new file mode 100644 index 0000000000..13e88be567 --- /dev/null +++ b/testing/web-platform/tests/webaudio/the-audio-api/the-waveshapernode-interface/waveshaper-limits.html @@ -0,0 +1,110 @@ +<!DOCTYPE html> +<html> + <head> + <title> + waveshaper-limits.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> + </head> + <body> + <script id="layout-test-code"> + let audit = Audit.createTaskRunner(); + + let context; + let bufferData; + let outputData; + let reference; + + let sampleRate = 48000; + // Must be odd so we have an exact middle point. + let testFrames = 23; + let scale = 1 / ((testFrames - 1) / 2 - 1); + // Number of decimal digits to print + let decimals = 6; + // Required accuracy + let diffThreshold = Math.pow(10, -decimals); + + // Generate reference data + function generateReference() { + // The curve data is 0, 1, 0, and the input data is a ramp from -1+eps + // to 1+eps. Then the output is a ramp from 0 to 1 back to 0. + let ref = new Float32Array(testFrames); + let midPoint = (testFrames - 1) / 2; + // First sample is below -1 at -1-scale. + ref[0] = 0; + // Generate ramp up to the mid-point + for (let k = 0; k < midPoint; ++k) { + ref[k + 1] = k * scale; + } + // The value at the mid-point must be 1, from the curve + ref[midPoint] = 1; + // Generate a ramp from 1 down to 0 + for (let k = midPoint; k < testFrames - 1; ++k) { + ref[k + 1] = 2 - k * scale; + } + // The last sample is out of range at 1+scale + ref[testFrames - 1] = 0; + return ref; + } + + function checkResult(renderedBuffer, should) { + outputData = renderedBuffer.getChannelData(0); + reference = generateReference(); + let success = true; + // Verify that every output value matches our expected reference value. + for (let k = 0; k < outputData.length; ++k) { + let diff = outputData[k] - reference[k]; + should( + Math.abs(diff), + 'Max error mapping ' + bufferData[k].toFixed(decimals) + ' to ' + + outputData[k].toFixed(decimals)) + .beLessThanOrEqualTo(diffThreshold); + } + } + + audit.define( + { + label: 'test', + description: + 'WaveShaperNode including values outside the range of [-1,1]' + }, + function(task, should) { + context = new OfflineAudioContext(1, testFrames, sampleRate); + // Create input values between -1.1 and 1.1 + let buffer = + context.createBuffer(1, testFrames, context.sampleRate); + bufferData = new Float32Array(testFrames); + let start = -1 - scale; + for (let k = 0; k < testFrames; ++k) { + bufferData[k] = k * scale + start; + } + buffer.copyToChannel(bufferData, 0); + + let source = context.createBufferSource(); + source.buffer = buffer; + + // Create simple waveshaper. It should map -1 to 0, 0 to 1, and +1 + // to 0 and interpolate all points in between using a simple linear + // interpolator. + let shaper = context.createWaveShaper(); + let curve = new Float32Array(3); + curve[0] = 0; + curve[1] = 1; + curve[2] = 0; + shaper.curve = curve; + source.connect(shaper); + shaper.connect(context.destination); + + source.start(); + context.startRendering() + .then(buffer => checkResult(buffer, should)) + .then(() => task.done()); + }); + + audit.run(); + </script> + </body> +</html> |