_USE_SSE2 was only being defined for win32 builds on x86-64

Signed-off-by: Tristan Matthews <le.businessman@gmail.com>

Signed-off-by: Tristan Matthews <le.businessman@gmail.com>

Signed-off-by: Tristan Matthews <le.businessman@gmail.com>

Patch by chutz.
https://trac.xiph.org/ticket/1825

Patch adapted from https://trac.xiph.org/ticket/1298



Signed-off-by: Tristan Matthews <le.businessman@gmail.com>

Signed-off-by: Tristan Matthews <le.businessman@gmail.com>

This is a little more consistent than spx_int32_t with other lengths.

Signed-off-by: Tristan Matthews <le.businessman@gmail.com>

The only difference between speex_alloc(size) and speex_realloc(NULL, size)
is that speex_alloc zero-initializes the memory, but every byte of memory
allocated is subsequently set anyway.

This also means that st->sinc_table_length is initialized even on the first
allocation of sinc_table.

Signed-off-by: Tristan Matthews <le.businessman@gmail.com>

Also adds inline asm implementations of WORD2INT(x) macro for fixed
and floating point.

Semantics of inner_product_single have also been changed to contain
the final right shift and saturation so it can also be implemented in
the optimal way for the used platform. This change affects fixed point
calculations only.

I also added a new fixed point macro SATURATE32PSHR(x, shift, a). It
does pretty much the same thing as SATURATE32(PSHR32(x, shift), a),
but it avoids over flowing in rounding up phase in the rare occasion
where x has already been saturated. It should also be slightly faster.

Use --enable-neon to force NEON optimization on. The auto detection
should also work if your CFLAGS supports NEON.

On many systems taking couple of kilo-bytes for full sinc table is not
a problem. With a straight filter table the number of MAC operations
needed drops to one quarter. Also the inner loop of the filter becomes
more simple and easier to optimize. So the full sinc table version
runs much faster in most cases. The trade off is some kilo-bytes
bigger memory usage and more CPU needed when initializing the
resampler.

configure.ac: Add --enable-resample-full-sinc-table conf flag

Use this flag to enable resampling with full sinc table.

Since the math.h one is what most systems will use anyway.

The $pkgincludedir for this package is now $includedir/speexdsp, which
isn't where established users are looking for these headers. Thanks to
the vlc folks for noticing this.

sample_frac_num is the array most likely to be non-zero after resampling a
previous stream, but the other arrays can also be left at non-zero values in
other situations.

Using a previous sample_frac_num can mean that the first input sample is
ignored.  This may usually not be significant, but may just be detectable when
only one channel of a stereo signal is affected.

Reviewed by Jean-Marc Valin <jmvalin@mozilla.com> at
https://bugzilla.mozilla.org/show_bug.cgi?id=973374



Signed-off-by: Tristan Matthews <le.businessman@gmail.com>

Cherry-picked from opus-tools d1354febb0fad9e5e9016530666e5b5974c2aba7

Signed-off-by: Tristan Matthews <le.businessman@gmail.com>

Cherry-picked from opus-tools 25c9d378d527604f86819d1cc33e77b4f36f3ae5

Signed-off-by: Tristan Matthews <le.businessman@gmail.com>

beta is set but immediately overrwritten before being read, therefore this
line had no effect

Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net>
Signed-off-by: Tristan Matthews <le.businessman@gmail.com>

Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net>
Signed-off-by: Tristan Matthews <le.businessman@gmail.com>

Cherry-picked from VLC commit 0f025b2eea9e2ae08b48209cbe5456c82caa3f47

Signed-off-by: Tristan Matthews <le.businessman@gmail.com>

This will also work on systems where libm is not required.

This is similar to the change we did in libogg some time back,
it means the generated header is less likely to vary unnecessarily
between system architectures.

That's not relevant here anymore, it's a speex option.

and clean up some more things that belonged to speex but aren't used
in this source tree.

Drop the SPEEX*_VERSION variables completely, we only use PACKAGE_VERSION
in the .pc file in this code.

It's out of date, but isn't used anywhere in this source tree.
The only place the one from configure.ac is used is in speexdsp.pc.in,
and that should probably be changed to SPEEXDSP_VERSION now.

It's no longer referenced by doc/manual.lyx in this tree.

This is a partial revert of 785e61a5.

The _BUILD_SPEEX special case isn't needed in the public headers, and
we don't need '../include' relative paths in the internal files.

Don't include speex.h in jitter.c, it's not needed there, and no longer
present in this source tree.

Switch from speex_types.h to speexdsp_types.h in arch.h, it's not clear
yet what the best thing to do with the latter will be (since they are
duplicates of each other and must always stay synchronised), but the
former is no longer present in this source tree anymore either.