Viswanath Puttagunta authored 9 years ago and Jean-Marc Valin committed 9 years ago

Extends usage of NEON optimized fixed-point FFT optimizations
in libNE10 to clt_mdct_forward and clt_mdct_backward.

Signed-off-by: Timothy B. Terriberry <tterribe@xiph.org>

Viswanath Puttagunta authored 9 years ago and Jean-Marc Valin committed 9 years ago

Uses NEON optimized fixed point FFT routines in NE10 library.

Signed-off-by: Timothy B. Terriberry <tterribe@xiph.org>

Viswanath Puttagunta authored 9 years ago and Jean-Marc Valin committed 9 years ago

Optimize opus decode (float only) use case using ARM NE10.
Mainly effects opus_ifft and ctl_mdct_backward and related
functions.

Work based on previous Encode optimization using ARM NE10
library. See previous commit for details on how to enable
this.

Signed-off-by: Timothy B. Terriberry <tterribe@xiph.org>

Viswanath Puttagunta authored 9 years ago and Jean-Marc Valin committed 9 years ago

Optimize opus encode (float only) usecase using ARM NE10
library. Mainly effects opus_fft and ctl_mdct_forward
and related functions.

This optimization can be used for ARM CPUs that have NEON
VFP unit. This patch only enables optimizations for ARMv7.

Official ARM NE10 library page available at
http://projectne10.github.io/Ne10/



To enable this optimization, use
--enable-intrinsics --with-NE10=<install_prefix>
or
--enable-intrinsics --with-NE10-libraries=<NE10_lib_dir> --with-NE10-includes=<NE10_includes_dir>

Compile time checks made during configure process to make sure
optimization option available only when compiler supports NEON
instrinsics.

Runtime checks made to make sure optimized functions only called
on appropriate hardware.

Signed-off-by: Timothy B. Terriberry <tterribe@xiph.org>

The usage of restrict in include/opus_custom.h was missed
by the prior commit replacing this keyword with a macro.

Also fixes some prototype/function agreement with respect to
restrict.

We had previously advised people to -Drestrict on
non-C99 compilers, but this creates problems for
some of the MSVC headers. Instead this just
uses a macro and defines it sanely.

This reverts commit 9f407afa.

Also added 3rd clause to "master" COPYING file

Saves a copy in the decoder

Gregory Maxwell authored 13 years ago and Jean-Marc Valin committed 13 years ago

non-ascii characters from the source.

Includes better error handling in fft/mdct init

Got authorization from all copyright holders

attempt to reduce copying.

encoders and decoders.

"inverse" flag from the state so it can be shared between the forward and
inverse transforms.