LibAudio: Don't return a seek point if it is after the desired sample

If the seek table was incomplete, without any seek points available before the target point, `SeekTable::seek_point_before()` would instead return the first seek point after the target. Check whether the seek point is before the target before returning it.
Author: https://github.com/Zaggy1024 Commit: https://github.com/SerenityOS/serenity/commit/a8dc97d95d Pull-request: https://github.com/SerenityOS/serenity/pull/19802 Reviewed-by: https://github.com/kleinesfilmroellchen ✅
2023-07-04 19:02:54 -05:00 · 2023-07-04 19:02:54 -05:00 · a8dc97d95d · 2024-07-17 11:30:05 +09:00
commit a8dc97d95d
parent 42675971e2
1 changed files with 2 additions and 0 deletions
--- a/Userland/Libraries/LibAudio/GenericTypes.cpp
+++ b/Userland/Libraries/LibAudio/GenericTypes.cpp
@ -40,6 +40,8 @@ Optional<SeekPoint const&> SeekTable::seek_point_before(u64 sample_index) const
        ++nearby_seek_point_index;
    while (nearby_seek_point_index > 0 && m_seek_points[nearby_seek_point_index].sample_index > sample_index)
        --nearby_seek_point_index;
+    if (m_seek_points[nearby_seek_point_index].sample_index > sample_index)
+        return {};
    return m_seek_points[nearby_seek_point_index];
 }