[Bug 750319] New: memory: subclasses don't know map flags in unmap
GStreamer (GNOME Bugzilla)
bugzilla at gnome.org
Wed Jun 3 01:21:58 PDT 2015
https://bugzilla.gnome.org/show_bug.cgi?id=750319
Bug ID: 750319
Summary: memory: subclasses don't know map flags in unmap
Classification: Platform
Product: GStreamer
Version: git master
OS: Linux
Status: NEW
Severity: normal
Priority: Normal
Component: gstreamer (core)
Assignee: gstreamer-bugs at lists.freedesktop.org
Reporter: ystreet00 at gmail.com
QA Contact: gstreamer-bugs at lists.freedesktop.org
GNOME version: ---
There are gstmemory's available that operate in two memory domains and need to
ensure consistent access between these domains.
Imagine a scenario where e.g. the GLMemory is mapped twice in both the GPU and
the CPU domain. On unmap or a subsequent map, it would like to ensure that the
most recent data is available in the memory domain requested. Either by
flushing the writes and/or initiating a DMA transfer. Without knowing which
domain is being unmapped, the memory does not know where the most recent data
is to transfer to the other memory domain.
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