It only handles the realloc constraint (preserving low elements) by
serendipity, and we don't actually rely on that behavior anyway.
Meanwhile the calls may do extra copying that gets immediately clobbered
by the callers.
Change-Id: I8dfa89e4a81084b084889c27bd272fdf85184e8d
Libvpx was memseting every external frame buffer before decode. This
was to work around a valgrind issue in our C loop filter. Most of
the time this was not needed and we have noticed some significant
performance loss on some platforms. Now we require the application to
zero out the buffers if it is using external frame buffers.
Change-Id: I7330d00a315e65137ed30edd5f813e8929b76242
This patch checks that a decoder never tries to reference frame that's
outside the range of 2x to 1/16th the size of this frame. Any attempt
to do so causes a failure.
Change-Id: I5c98fa7bb95ac4f29146f29dd92b62fe96164e4c
Added support for external frame buffers to libvpx's VP9 decoder.
If the external frame buffer functions are set then libvpx will
call the get function whenever it needs a new frame buffer to
decode a frame into. And it will call the release function
whenever there are no more references to that buffer.
Change-Id: Id2934d005f606af6e052fb6db0d5b7c02f567522
This CL changes libvpx to call a function when a frame buffer
is needed for decode. Libvpx will call a release callback when
no other frames reference the frame buffer. This CL adds a
default implementation of the frame buffer callbacks. Currently
only VP9 is supported. A future CL will add support for
applications to supply their own frame buffer callbacks.
Change-Id: I1405a320118f1cdd95f80c670d52b085a62cb10d
