tree f282640814f35c9da2f3d37348c45b44ecd7030f
parent 457193d9b960a673fe82a50252bc6475aab151cf
author Wan-Teh Chang <wtc@google.com> 1761785786 -0700
committer Wan-Teh Chang <wtc@google.com> 1761856258 -0700

Avoid issue AOMediaCodec/libavif#2886

avifRGBImagePremultiplyAlpha() and avifRGBImageUnpremultiplyAlpha()
assume four-channel pixel buffers, so they would overrun the two-channel
pixel buffer in an avifRGBImage of the AVIF_RGB_FORMAT_GRAYA or
AVIF_RGB_FORMAT_AGRAY format. Return AVIF_RESULT_NOT_IMPLEMENTED before
this bug is fixed.

The bug was reported by Harrison Green.

Avoids https://github.com/AOMediaCodec/libavif/issues/2886.