Not guaranteed to be in nanosecond resolution. On iOS 7 the duration
of one tick is 125/3 ns which is still more than an order of magnitude
better then microseconds.

Replace decicycles with the neutral UNITS. Decicycles is strange but
tenths of a nanosecond and unspecific "deci"-ticks for mach_absolute_time
is just silly.

Based on a patch by Russel King <rmk+libav@arm.linux.org.uk>

Bug-Id: 646
CC: libav-stable@libav.org

Based on x264 code

Signed-off-by: James Almer <jamrial@gmail.com>

Based on x264 code

Signed-off-by: James Almer <jamrial@gmail.com>

Signed-off-by: James Almer <jamrial@gmail.com>

Based on e3fec3f095 for arm.

vector_fmul and vector_fmac_scalar are guaranteed that they can process in
batch of 16 elements, but their SSE versions only does 8 at a time.

Therefore, unroll them a bit.
299 to 261c for 256 elements in vector_fmac_scalar on Arrandale/Win64.

Signed-off-by: Janne Grunau <janne-libav@jannau.net>

It was never used since it was added and the things it was intended for
are now exported differently.

Also add warning comment about threading implementations without matching
atomics implementation to the atomics fallback implementation.

If linking in an object file without this attribute set, the
linker will assume that an executable stack might be needed.

Signed-off-by: Martin Storsjö <martin@martin.st>

This fixes two related Doxygen warnings.

This makes the generated assembly more internally consistent,
avoiding declaring two labels for the same function (for cases
where EXTERN_ASM is empty) and not declaring a separate unprefixed
label in other cases.

This also makes sure the .func and .type delcarations have the same
prefix. They have previously not been used on the platforms
that have prefixed symbols on arm (iOS), but gas-preprocessor
has recently started using the .func declarations for adding
.thumb_func declarations for such functions.

Signed-off-by: Martin Storsjö <martin@martin.st>

@code command reports verbatim everything between it and @endcode.

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

CC:libav-stable@libav.org

Work around Yasm's inefficiency with handling large numbers of variables
in the global scope.

Signed-off-by: Diego Biurrun <diego@biurrun.de>

Added libavutil/timer.h include to all files with {START,STOP}_TIMER.

NEON and VFP are currently mandatory for all ARMv8 profiles. Both are
handled as extensions as far as cpuflags are concerned. This is
consistent with handling x86_64 which always has SSE2, but still
handles it as an extension.

Signed-off-by: Janne Grunau <janne-libav@jannau.net>

This is pretty much based on the same test for XMM registers.

Signed-off-by: Martin Storsjö <martin@martin.st>

The function macro always sets .align 2 before declaring the
function label (since 5c5e1ea3) and always sets the section to
.text (since 278caa6a).

The .align 5 before certain functions, added in fc252eba, were added
before .text and .align were added to the function macro and thus
became useless/unused when the function macro got them.

This restores the original intention, to align the loop entry
points.

Signed-off-by: Martin Storsjö <martin@martin.st>

The new code is faster and reuses the previous state in case of
multiple calls.

The previous code could easily end up in near-infinite loops,
if the difference between two clock() calls never was larger than
1.

This makes fate-parseutils finish in finite time when run in wine,
if CryptGenRandom isn't available (which e.g. isn't available if
targeting Windows RT/metro).

Patch originally by Michael Niedermayer but with some modifications
by Martin Storsjö.

Signed-off-by: Martin Storsjö <martin@martin.st>

Includes a libavcodec utility function to update a frame's side data.

It is a public function, it must not assert on its parameters.

And remove all the circular inclusions of avutil.h while at it.

This is a more sensible place for these macros.

Also fix the #endif comment in a few places and #include config.h to
avoid assuming it is #included implicitly.

It was deprecated over two years ago.

Commit 41578f70cf changed the LLS API, which was
called from libavcodec. Thus using an old libavcodec with a new libavutil will
break.

All scheduled API changes are deferred to the next bump.

Uniform the style and eliminate a warning on newer doxygen version..

This long-deprecated code should disappear at the next version bump.

Simplifies host/target libc detection splitting.