Bug 268416

Summary: [GStreamer] Use m_videoSize for DMABuf dimensions if available
Product: WebKit Reporter: Marek Vasut <marex+webkit>
Component: PlatformAssignee: Nobody <webkit-unassigned>
Status: RESOLVED FIXED    
Severity: Normal CC: webkit-bug-importer
Priority: P2 Keywords: InRadar
Version: WebKit Nightly Build   
Hardware: Unspecified   
OS: Unspecified   

Description Marek Vasut 2024-01-30 15:13:55 PST
In case of hardware decoding of H.264 video with dimensions that are not macroblock aligned, e.g. 1080x1920, the VideoMeta might indicate the actual physical dimensions of the buffer containing the decoded video data, as written by the hardware decoder, that is 1088x1920 instead of 1080x1920 . This leads to an 8px wide stripe of corrupted pixels at the edge of the displayed video.

The valid video data are a subset of that buffer content and their dimensions can be obtained from caps. The code already stores those dimensions in m_videoSize, so in case m_videoSize is not empty, use dimensions from m_videoSize instead of the buffer dimensions.

This happens on NXP i.MX8M Plus with Hantro G1 VPU .

This fix is similar to GStreamer commit:
0b648f9a2d1e ("waylandsink: Crop surfaces to their display width height")
https://gitlab.freedesktop.org/gstreamer/gstreamer/-/commit/0b648f9a2d1e
Comment 1 Marek Vasut 2024-01-30 15:17:44 PST
PR https://github.com/WebKit/WebKit/pull/23543
Comment 2 EWS 2024-01-31 02:01:23 PST
Committed 273819@main (b3d3dc5c2be0): <https://commits.webkit.org/273819@main>

Reviewed commits have been landed. Closing PR #23543 and removing active labels.
Comment 3 Radar WebKit Bug Importer 2024-01-31 02:02:15 PST
<rdar://problem/121999536>