This could cause overflows when processing non-saturated TDAC values.

Otherwise, the output can grow as large as SIG_SAT/(1-0.75), which can cause
an overflow when adding two values (before multiplying by the filter tap).

Jonathan Lennox authored 9 years ago and Jean-Marc Valin committed 9 years ago

Enable x86 intrinsics when building in floating-point mode.
Support SSE as an arch value.
Use RTCD to conditionally enable existing floating-point Celt SSE code.
Call functions directly (without RTCD) when their architecture can be presumed.
Use SSE4.1 intrinsics optimized code for Silk even in floating-point mode.

This way we won't break this by accident.

Rhishikesh Agashe authored 10 years ago and Jean-Marc Valin committed 10 years ago

Signed-off-by: Jean-Marc Valin <jmvalin@jmvalin.ca>

Should make it easy to adapt to other architectures.

This one meets or exceeds the following requirements:

 - Version is checked/updated for every build action when in the git repo.
   Does not require the user to re- ./configure to get the correct version.

 - Version is not updated automatically when using exported tarball source.
   Avoids accidentally getting a wrong version from some other git repo in
   a parent directory of the source, and allows setting the correct version
   for distro package exports.

 - Automatic updating can be manually suppressed.
   For developers doing lots of change/rebuild cycles they don't plan to
   release, when they don't want a full rebuild triggered for every commit,
   and again for every change made immediately after a commit.
   The version will still always be updated if they do a `make dist`.

 - Does not require any manual updating of versions in the mainline git
   repo for each release aside from normal tagging.  The version is
   recorded in one file only, that is automatically generated and will
   never need to be committed.

 - Does not require gnu-make features for the autoconf builds.

It does not currently:

 - Keep a checksum of every source file in tarball releases to mangle the
   version if people modify the tarball source.  Responsible people can
   manually update the version easily though in such cases.

The version.mk file is now only used by the VC project files.  Once they
are updated to use the package_version file too, then it can be deleted
from the repository.

Delays stack allocations as much as possible, and makes some of these
allocations conditional.

Doing the overlap coying in the same OPUS_MOVE() as the rest of the synthesis
memory. Also, there was a missing OPUS_MOVE() in the PLC for the hybrid/CNG
case.

Nils Wallménius authored 12 years ago and Jean-Marc Valin committed 12 years ago

Use the output buffer directly for imdct output, avoiding use of an
intermediary buffer and copying from it. This works because the output
buffer is offset to always be continous with the overlap buffer in the
decoder. Adjust encoder resynth code to have the same buffer layout.

Signed-off-by: Jean-Marc Valin <jmvalin@jmvalin.ca>

This one is explicitly based on a simple temporal masking model

Removed a bunch of if()s from the loops and made the compiler life's
easier by moving some pointer accesses outside the loops.

mode->eBands[]

st->mode->overlap
st->mode->nbEBands
st->overlap
st->mode

Removes the resampling branches from the main loop and no longer computes
the multiplications for coefs equal to one or zero.

Also removes the -exp_analysis suffix from opus_get_version_string()
and fixes a "ISO C90 forbids mixed declarations and code" warning.