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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 17:32:43 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 17:32:43 +0000 |
commit | 6bf0a5cb5034a7e684dcc3500e841785237ce2dd (patch) | |
tree | a68f146d7fa01f0134297619fbe7e33db084e0aa /testing/web-platform/tests/webaudio/resources/mix-testing.js | |
parent | Initial commit. (diff) | |
download | thunderbird-upstream.tar.xz thunderbird-upstream.zip |
Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'testing/web-platform/tests/webaudio/resources/mix-testing.js')
-rw-r--r-- | testing/web-platform/tests/webaudio/resources/mix-testing.js | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/testing/web-platform/tests/webaudio/resources/mix-testing.js b/testing/web-platform/tests/webaudio/resources/mix-testing.js new file mode 100644 index 0000000000..63c8e1aca6 --- /dev/null +++ b/testing/web-platform/tests/webaudio/resources/mix-testing.js @@ -0,0 +1,23 @@ +let toneLengthSeconds = 1; + +// Create a buffer with multiple channels. +// The signal frequency in each channel is the multiple of that in the first +// channel. +function createToneBuffer(context, frequency, duration, numberOfChannels) { + let sampleRate = context.sampleRate; + let sampleFrameLength = duration * sampleRate; + + let audioBuffer = + context.createBuffer(numberOfChannels, sampleFrameLength, sampleRate); + + let n = audioBuffer.length; + + for (let k = 0; k < numberOfChannels; ++k) { + let data = audioBuffer.getChannelData(k); + + for (let i = 0; i < n; ++i) + data[i] = Math.sin(frequency * (k + 1) * 2.0 * Math.PI * i / sampleRate); + } + + return audioBuffer; +} |