This adds the reversed byte-order version of the ANSI CRC16.

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

Based on a patch by James Almer <jamrial@gmail.com>.

Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>

According to the ReplayGain spec, the peak amplitude may overflow and may result
in peak amplitude values greater than 1.0 with psychoacoustically coded audio,
such as MP3. Fully compliant decoders must allow peak overflows.

Additionally, having peak values in the 0<->UINT32_MAX scale makes it more
difficult for applications to actually use the peak values (e.g. when
implementing clipping prevention) since values have to be rescaled down.

This patch corrects the peak parsing by removing the rescaling of the decoded
values between 0 and UINT32_MAX and the 1.0 upper limit.

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

Add the missing define.

And move outside the wrong doxygen group.

And provide extended coloring capabilities for debugging.
The default colors do not change in 256 more to keep
supporting people using Black on White, White on Black and
Solarized terminals.

Signed-off-by: Luca Barbato <lu_zero@gentoo.org>

Arch-specific optimizations are handled this way everywhere else.

It is not supported by all compilers on FATE. Fixes "some test were
skipped" errors.

This fixes fate-float_dsp-test on RVCT 4.0.

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

Ported from arm NEON and added vector_dmul_scalar.

Functions between 1.5 and 5 times faster than the C implementations
using Apple's clang-503.0.19 on A7.

Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>

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.