The lowest supported VAAPI version is 0.34 (checked at configure
time), so this test is no longer needed.

If no string argument is supplied when av_hwdevice_ctx_create() is
called to create a VAAPI device, we currently only try the default
X11 display (that is, $DISPLAY) to find a device, and will therefore
fail in the absence of an X server to connect to.  Change the logic
to also look for a device via the first DRM render node (that is,
"/dev/dri/renderD128"), which is probably the right thing to use in
most simple configurations which only have one DRM device.

Unbreak `avconv -filter_complex testsrc`.

Regression introduced in a3a0230a

Signed-off-by: Anton Khirnov <anton@khirnov.net>

This will be needed for frame threading.
Signed-off-by: Anton Khirnov <anton@khirnov.net>

We need more information from last/cur_frame than from reference
buffers, so we can use a simplified structure for reference buffers,
and then store mvs and segmentation map information in last/cur.

This prepares the decoder for frame threading support.
Signed-off-by: Anton Khirnov <anton@khirnov.net>

Not from the underlying frame. Fixes races with frame threading in
field-coded files, where decoding would wait for the wrong field (e.g.
random failures in mixed-nal-coding).

Bug-Id: 954

Fixes memory leaks in some FATE tests.

A non-existent av_buffer_pool_can_uninit() function is mentioned instead
of av_buffer_pool_uninit(). Also, this function is to be called by the
caller, not the pool itself.

Bug-Id: 660

The frame dimensions are 16bit, so the mv bounds can easily overflow
int16 for large videos.

Bug-Id: Handbrake/46
CC: libav-stable@libav.org
Signed-off-by: Anton Khirnov <anton@khirnov.net>

In such a case behave as if the buffer was not reallocatable -- allocate a
new one and copy the data (preserving just the part described by the
reference passed to av_buffer_realloc).

CC: libav-stable@libav.org
Reported-By: wm4 <nfxjfg@googlemail.com>

Signed-off-by: Anton Khirnov <anton@khirnov.net>

Also a slight change to the ssse3 code, which prevents a theoretical
overflow in the sharp filter.
Signed-off-by: Anton Khirnov <anton@khirnov.net>

Roughly 25% faster MC than ssse3 for blocksizes 32 and 64.
Reviewed-by: Ronald S. Bultje <rsbultje@gmail.com>
Signed-off-by: James Almer <jamrial@gmail.com>
Signed-off-by: Anton Khirnov <anton@khirnov.net>

Signed-off-by: Anton Khirnov <anton@khirnov.net>