The previous code would go out of sync in those cases.

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

The new detector for SWB vs FB is unreliable due to the hack
that was required to get 24 kHz analysis working. We're now err
on the side of FB just to make sure.

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

Add a reset function for the TonalityAnalysisState struct
and call it on encoder reset.

Move the state struct above the clear line in OpusEncoder
so reset doesn't clobber reusable fields. Currently this
is only the arch field, which is moved to to top of the
struct so we can use the same memset-to-the-end pattern
as OpusEncoder.

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

This interns the asm flags parameter in the state struct
so we don't need to pass it with every call. It can be
expensive, so we don't want to query every run_analysis()
call, but since this (private) api is used by webrtc code
we need to provide a supportable interface for filling in
the correct value.

Note the initialization code is partially duplicated between
opus_encoder_init and the OPUS_RESET_STATE switch case, so we
must re-initialize it there.

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

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>

This fixes an actual error in the downmix (using the float version even
for the int API), as well as a bunch of conversion warnings.

Should fix delayed decision on surround, but not well tested.

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

I checked that it's not *completely* busted, but it probably needs more testing.

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

This is done using an adaptive beta and an estimate of the speech
and music detection confidence

Variable duration option renamed to OPUS_SET_EXPERT_FRAME_DURATION,
with new API.
Also moves up the analysis to avoid having to do int->float conversion
on large buffers.

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

Also, reducing the VBR rate on panned mono

This reverts commit 9f407afa.

Also added 3rd clause to "master" COPYING file

In f9265ddf opus_get_version_string() was moved
to libcelt, but the fallback definition for OPUS_VERSION
stayed in src/opus.c. This is helpful for those using
and external build system, which may not duplicate
all the defines from the included build files.

Thanks to Tim Terriberry for pointing out the issue.

This better distinguishes the reference implementation,
which is what this string is meant to do. Thanks to
Greg Maxwell for the suggestion.

This lets users print it out without context, which is a little
easier for clients.

The new opus_get_version_string() call just returns a static string
defined by OPUS_VERSION, which is passed in from the build system
through config.h (or a custom compile line). Provide a fallback to
"unknown" if the build system fails to actually provide that definition.

This restores compilation with Makefile.draft.

In general, this means there will be builds out there with non-specific
version strings, since ports won't be forced to update the string. While
that's unfortunate, I think it's more valuable that the library be simple
to build.

Timothy B. Terriberry authored 14 years ago and Jean-Marc Valin committed 14 years ago

These were used because the entropy coder originally came from
 outside libcelt, and thus did not have a common type system.
It's now undergone enough modification that it's not ever likely to
 be used as-is in another codec without some porting effort, so
 there's no real reason to maintain the typedefs separately.
Hopefully we'll replace these all again somedate with a common set
 of Opus typedefs, but for now this will do.

This fixes an issue caused by commit 6c8acbf1, which moved the
 ec_ilog() prototype from entcode.h to ecintrin.h, where the
 ec_uint32 typedef was not yet available.
Thanks to John Ridges for the report.

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