Branch: refs/heads/main
Home: https://github.com/WebKit/WebKit
Commit: b69cb1f238e9f05b9a3e60ac88a710a7bc62383a
https://github.com/WebKit/WebKit/commit/b69cb1f238e9f05b9a3e60ac88a710a7bc62383a
Author: Charlie Wolfe <[email protected]>
Date: 2026-06-17 (Wed, 17 Jun 2026)
Changed paths:
A
LayoutTests/imported/w3c/web-platform-tests/webaudio/the-audio-api/the-iirfilternode-interface/iirfilter-normalization-precision-expected.txt
A
LayoutTests/imported/w3c/web-platform-tests/webaudio/the-audio-api/the-iirfilternode-interface/iirfilter-normalization-precision.html
M Source/WebCore/Modules/webaudio/IIRProcessor.cpp
Log Message:
-----------
IIRProcessor normalization coefficient is narrowed to float
https://bugs.webkit.org/show_bug.cgi?id=317225
rdar://179847280
Reviewed by Chris Dumez.
"float scale = feedback[0]" narrows the double coefficient to single precision
before it divides the
double-precision feedforward/feedback coefficients, reducing filter precision
for any coefficient
set whose a[0] is not exactly representable as a float. Use a double.
Test:
imported/w3c/web-platform-tests/webaudio/the-audio-api/the-iirfilternode-interface/iirfilter-normalization-precision.html
*
LayoutTests/imported/w3c/web-platform-tests/webaudio/the-audio-api/the-iirfilternode-interface/iirfilter-normalization-precision-expected.txt:
Added.
*
LayoutTests/imported/w3c/web-platform-tests/webaudio/the-audio-api/the-iirfilternode-interface/iirfilter-normalization-precision.html:
Added.
* Source/WebCore/Modules/webaudio/IIRProcessor.cpp:
(WebCore::IIRProcessor::IIRProcessor):
Canonical link: https://commits.webkit.org/315400@main
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