[webkit-changes] [WebKit/WebKit] c3bf8d: [MSE] Reuse "fudge factor" when samples are removed

[Przemyslaw Gorszkowski]

  Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: c3bf8dd554481b04a008756c79c53040279ca936
      https://github.com/WebKit/WebKit/commit/c3bf8dd554481b04a008756c79c53040279ca936
  Author: Przemyslaw Gorszkowski <pgorszkowski at igalia.com>
  Date:   2023-07-27 (Thu, 27 Jul 2023)

  Changed paths:
    M Source/WebCore/html/TimeRanges.cpp
    M Source/WebCore/html/TimeRanges.h
    M Source/WebCore/platform/graphics/PlatformTimeRanges.cpp
    M Source/WebCore/platform/graphics/PlatformTimeRanges.h
    M Source/WebCore/platform/graphics/SourceBufferPrivate.cpp
    M Source/WebCore/platform/graphics/SourceBufferPrivate.h
    M Source/WebCore/platform/graphics/TrackBuffer.cpp
    M Source/WebCore/platform/graphics/TrackBuffer.h
    M Tools/TestWebKitAPI/Tests/WebCore/TimeRanges.cpp

  Log Message:
  -----------
  [MSE] Reuse "fudge factor" when samples are removed
https://bugs.webkit.org/show_bug.cgi?id=258869

Reviewed by Xabier Rodriguez-Calvar.

Currently when TrackBuffer::removeSamples is called and erasedRanged is created from the samples,
removing small gaps between samples is not done. It causes that in some cases many separated ranges
are created which has impact on performance of removing samples.

Reusing "eliminate small gap" mechanism from SourceBufferPrivate::processMediaSample solves the problem.

* Source/WebCore/html/TimeRanges.cpp:
(WebCore::TimeRanges::add):
* Source/WebCore/html/TimeRanges.h:
* Source/WebCore/platform/graphics/PlatformTimeRanges.cpp:
(WebCore::PlatformTimeRanges::timeFudgeFactor):
(WebCore::PlatformTimeRanges::add):
* Source/WebCore/platform/graphics/PlatformTimeRanges.h:
* Source/WebCore/platform/graphics/SourceBufferPrivate.cpp:
(WebCore::SourceBufferPrivate::processMediaSample):
* Source/WebCore/platform/graphics/SourceBufferPrivate.h:
(WebCore::SourceBufferPrivate::timeFudgeFactor const):
* Source/WebCore/platform/graphics/TrackBuffer.cpp:
(WebCore::TrackBuffer::addBufferedRange):
(WebCore::TrackBuffer::removeSamples):
* Source/WebCore/platform/graphics/TrackBuffer.h:
* Tools/TestWebKitAPI/Tests/WebCore/TimeRanges.cpp:
(TestWebKitAPI::TEST):

Canonical link: https://commits.webkit.org/266357@main