[Bug 754120] avdec_hevc: Segfault in hevc decode with glimagesink and AVX2 CPU feature

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=754120

--- Comment #21 from Tim-Philipp Müller <t.i.m at zen.co.uk> ---
Created attachment 311188
  --> https://bugzilla.gnome.org/attachment.cgi?id=311188&action=edit
avvideodec: ensure required mem alignment fixing avdec_h265 crashes with
ximagesink/glimagesink

Make sure the alignment requirement in GstAllocationParams
matches the GstVideoAlignment requirements. This fixes
issues with avdec_h265 crashing in the avx2 code path when
used with playbin and ximagesink/glimagesink as videosink.

The internal video pool would allocate buffers with an
alignment of 15 even though GstVideoAlignment specified
a stride_align requirement of 31 (which comes from ffmpeg).

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