[Webkit-unassigned] [Bug 201870] New: [GStreamer] isAVC1CodecSupported is crashing many media source tests

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=201870

            Bug ID: 201870
           Summary: [GStreamer] isAVC1CodecSupported is crashing many
                    media source tests
           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: cturner at igalia.com
                CC: bugs-noreply at webkitgtk.org

GStreamerRegistryScanner::isAVC1CodecSupported is a little sloppy not checking NULL returns from the gst_codec_utils* family which is causing the crashes. But there's a deeper problem, the NULL return is for when the h264 codec utility thinks there's an erroneous input. Particularly, it doesn't like the level_idc in the SPS for avc1.4D4001. There's nothing wrong with that according to the spec, so there's two bugs,

  1. Fix the sloppy NULL checking in WebKit
  2. Fix GStreamer to correctly parse the level_idc

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