[Webkit-unassigned] [Bug 214132] New: [MSE][GStreamer] Remove m_appendPipelinesMap

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=214132

            Bug ID: 214132
           Summary: [MSE][GStreamer] Remove m_appendPipelinesMap
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebKitGTK
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: aboya at igalia.com
                CC: bugs-noreply at webkitgtk.org

m_appendPipelinesMap was owned by MediaPlayerPrivateGStreamerMSE but
was only used by MediaPlayerPrivateGStreamerMSE to clear it during
destruction, while the other uses were in
MediaSourceClientGStreamerMSE.

After analysis, it was found keeping a HashMap of AppendPipelines is not
necessary. An AppendPipeline only needs to be used by the SourceBuffer
receiving the muxed data: making AppendPipeline a member of
SourceBufferPrivateGStreamer reflects this dependency in a much
clearer way. No need for a HashMap of AppendPipeline's.

Moreso, there are no other users of AppendPipeline, which means
AppendPipeline doesn't need to be ref counted. This patch removes that
feature, using std::unique_ptr<AppendPipeline> for ownership instead.

This patch is a refactor: it doesn't introduce behavior changes and
it's covered by existing tests.

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