0ct0pu5/ladybird
1
0
Fork 0
mirror of https://github.com/LadybirdBrowser/ladybird.git synced 2024-12-14 10:20:36 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 7

LibAudio: Skip empty MP3 scale factor bands in stereo intensity process

Browse source 
These were intentionally set up to be at the end of the granule size,
but since the stereo intensity loop is intentionally using a <= end
comparison (that’s how the scale factor bands work), we must skip these
dummy bands which would otherwise cause an out-of-bounds index.
This commit is contained in:
kleines Filmröllchen 2023-08-20 18:53:16 +02:00 committed by Andrew Kaster
parent 24f5914d18
commit a0bcc9dd83
Notes: sideshowbarker 2024-07-17 05:05:51 +09:00 
Author: https://github.com/kleinesfilmroellchen
Commit: https://github.com/SerenityOS/serenity/commit/a0bcc9dd83
Pull-request: https://github.com/SerenityOS/serenity/pull/20686
Reviewed-by: https://github.com/Hendiadyoin1
1 changed files with 3 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

3
Userland/Libraries/LibAudio/MP3Loader.cpp
View file

@ -724,6 +724,9 @@ void MP3LoaderPlugin::process_stereo(MP3::MP3Frame& frame, size_t granule_index)
auto process_intensity_stereo = [&](MP3::Tables::ScaleFactorBand const& band, float intensity_stereo_ratio) {
for (size_t i = band.start; i <= band.end; i++) {
// Superflous empty scale factor band.
if (i >= MP3::granule_size)
continue;
float const sample_left = granule_left.samples[i];
float const coeff_l = intensity_stereo_ratio / (1 + intensity_stereo_ratio);
float const coeff_r = 1 / (1 + intensity_stereo_ratio);