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5 commits

Author SHA1 Message Date
Matthew Waters
640a65bf96 gst: don't use volatile to mean atomic 
volatile is not sufficient to provide atomic guarantees and real atomics
should be used instead.  GCC 11 has started warning about using volatile
with atomic operations.

https://gitlab.gnome.org/GNOME/glib/-/merge_requests/1719

Discovered in https://gitlab.freedesktop.org/gstreamer/gst-plugins-good/-/issues/868

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/merge_requests/2098>
 2021-03-22 14:34:36 +11:00
Sebastian Dröge
634cd87c76 gst: Clear floating flag in constructor of all GstObject subclasses that are not owned by any parent 
https://bugzilla.gnome.org/show_bug.cgi?id=743062
 2017-05-17 10:40:23 +03:00
Alessandro Decina
8a05102747 applemedia: fix compiler warning 2016-08-26 22:52:41 +10:00
Alessandro Decina
7898bc5810 applemedia: changes to make GL memory mappable on CPU on iOS 
This commit introduces IOSGLMemory which is a GLMemory that falls back to
GstAppleCoreVideoMemory for CPU access. This is a temporary solution until
IOSurface gets exposed as a public framework on iOS and so we can use
IOSurfaceMemory on both MacOS and iOS.

https://bugzilla.gnome.org/show_bug.cgi?id=769210
 2016-08-26 17:44:48 +10:00
Ilya Konstantinov
936b2fdfbc applemedia: implement GstAppleCoreVideoMemory 
Implement a new memory type wrapping CVPixelBuffer.

There are two immediate advantages:
 a) Make the GstMemory itself retain the CVPixelBuffer. Previously,
    the containing GstBuffer was solely responsible for the lifetime of
    the backing CVPixelBuffer.

    With this change, we remove the GST_MEMORY_FLAG_NO_SHARE so that
    GstMemory objects be referenced by multiple GstBuffers (doing away
    with the need to copy.)

  b) Delay locking CVPixelBuffer into CPU memory until it's actually
     mapped -- possibly never.

The CVPixelBuffer object is shared among references, shares and
(in planar formats) planes, so a wrapper GstAppleCoreVideoPixelBuffer
structure was introduced to manage locking.

https://bugzilla.gnome.org/show_bug.cgi?id=747216
 2016-01-19 12:58:43 +11:00