Convert to 16 bits only at the very end

Should never occur on amd64, but it could on 32-bit x86

Controls whether deep PLC is enabled

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

That corresponds to the fundamental for the shortest pitch period allowed

Based on two dense layers with a GRU layer in the middle

We boost bands that either cause leakage or are filled with leakage

The change also makes the analysis run for sampling rates of 16 kHz and 24 kHz
since the features are only computed on the 0-8 kHz band. The longer time
window (20 ms instead of 10 ms) makes the tonality estimator more reliable
for low-pitch harmonics.

That experiment never actually worked

Felicia Lim authored 8 years ago and Jean-Marc Valin committed 8 years ago

A frame is marked as valid for DTX if it contains noise or only digital
silence. As before, there is an overhang period of 200 ms and a maximum
consecutive DTX period of 400 ms.

If the new DTX cannot be used because of the complexity setting and
sampling frequency chosen, the SILK DTX will be used instead.

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

There are no tabs in source code.

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.

We only keep when concealing less than 10ms with SILK.

Timothy B. Terriberry authored 11 years ago and Jean-Marc Valin committed 11 years ago

Optimizing celt_pitch_xcorr()/xcorr_kernel() which also speeds up
FIRs, IIRs and auto-correlations

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

http://lists.xiph.org/pipermail/opus/2013-November/002372.html

Newer versions of MSVC are unhappy with the strategy of the build
 environment redefining "inline" (even though they don't support the
 actual keyword). Instead we define OPUS_INLINE to the right thing
 in opus_defines.h.

This is the same approach we use for restrict.

Code is still float, but at least tonality esitmation seems to work.
Speech/music analysis is still disabled.

The channel energy is now computed using an MDCT in the multi-stream
encoder rather than computing the energy of the stereo downmix.

This should prevent errors in the bandwidth detection from affecting quality
when we have enough bits to be close to transparent.

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.

The idea is that the rate of each stream is adjusted based on its
contribution to the total energy of a stereo downmix.

Forces CELT-only mode for LFE (despite the rate) and "locks" most of the
CELT analysis:
- No transient or TF
- Band boost on first band
- Only first two bands get PVQ bits
- Forced energy decay after the first two bands

Conflicts:
	src/opus_multistream_encoder.c

Can now work up to full-band and uses lsb_depth to fix the noise issue.

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

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.

Also, reducing the VBR rate on panned mono