Bug 250576 – [WebRTC] Fix -Wunused-but-set-variable warnings in the libvpx project

• Component: WebRTC
• Status: RESOLVED FIXED

[David Kilzer (:ddkilzer)]

Fix -Wunused-but-set-variable warnings in the libvpx project:

/Volumes/Data/worker/macOS-AppleSilicon-Ventura-Debug-Build-EWS/build/Source/ThirdParty/libwebrtc/Source/third_party/libvpx/source/libvpx/vp9/encoder/vp9_mbgraph.c:246:9: error: variable 'arf_y_in_offset' set but not used [-Werror,-Wunused-but-set-variable]
    int arf_y_in_offset = arf_y_offset;
        ^
/Volumes/Data/worker/macOS-AppleSilicon-Ventura-Debug-Build-EWS/build/Source/ThirdParty/libwebrtc/Source/third_party/libvpx/source/libvpx/vp9/encoder/vp9_mbgraph.c:247:9: error: variable 'gld_y_in_offset' set but not used [-Werror,-Wunused-but-set-variable]
    int gld_y_in_offset = gld_y_offset;
        ^

Originally found by this EWS build for Bug 250431:  <https://ews-build.webkit.org/#/builders/85/builds/2919>

Same as upstream commit:

  vp9,update_mbgraph_frame_stats: rm unused variables
  https://github.com/webmproject/libvpx/commit/a165f4ba64ec8c992ca57a1b4444cd4a19527dde

[Radar WebKit Bug Importer]

<rdar://problem/104224212>

[David Kilzer (:ddkilzer)]

Pull request: https://github.com/WebKit/WebKit/pull/8624

[David Kilzer (:ddkilzer)]

(In reply to David Kilzer (:ddkilzer) from comment #2)
> Pull request: https://github.com/WebKit/WebKit/pull/8624

Playing whack-a-mole now (not sure why I don't see these all at once):

/Volumes/Data/worker/iOS-16-Build-EWS/build/Source/ThirdParty/libwebrtc/Source/third_party/libvpx/source/libvpx/vp9/encoder/vp9_encodeframe.c:831:14: error: variable 'ysignal' set but not used [-Werror,-Wunused-but-set-variable]
    uint8_t *ysignal = x->plane[0].src.buf;
             ^
/Volumes/Data/worker/iOS-16-Build-EWS/build/Source/ThirdParty/libwebrtc/Source/third_party/libvpx/source/libvpx/vp9/encoder/vp9_encodeframe.c:832:14: error: variable 'usignal' set but not used [-Werror,-Wunused-but-set-variable]
    uint8_t *usignal = x->plane[1].src.buf;
             ^
/Volumes/Data/worker/iOS-16-Build-EWS/build/Source/ThirdParty/libwebrtc/Source/third_party/libvpx/source/libvpx/vp9/encoder/vp9_encodeframe.c:833:14: error: variable 'vsignal' set but not used [-Werror,-Wunused-but-set-variable]
    uint8_t *vsignal = x->plane[2].src.buf;
             ^

This was fixed in upstream commit:

  Fix some instances of -Wunused-but-set-variable.
  https://github.com/webmproject/libvpx/commit/fc04a9491ebaaa8e2b1c7c8e0587c8a1873531d6

[EWS]

Committed 258906@main (fa03411b2de6): <https://commits.webkit.org/258906@main>

Reviewed commits have been landed. Closing PR #8624 and removing active labels.