We're now a bit more conservative and only take into account the bands
that are being codec. Also weighting the rate saving by the band width.

Not well tested.

Still untested.

This should make the scaling the same for fixed and float. It changes the float
scaling too by normalizing by the number of channels, which matters for
bandwidth detection.

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.

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

Saves 2.5% on ARM without any asm. The float build still uses the old
code because celt_fir() then becomes a float function.

bit-exact with original version

Should gives us ARM/SSE optimizations for free.

This prevented opening the files from the 'Solution Explorer'
interface where the source listing is displayed. Thanks to
Koen Vos for reporting the issue.

Thanks to thinqa for the report.
Fixes #1968.

Daniel Jensen authored 11 years ago and Gregory Maxwell committed 11 years ago

Signed-off-by: Gregory Maxwell <greg@xiph.org>

By default Visual Studio warns about various C stdlib calls,
recommending non-portable replacements instead. We disable
this warning in a number of places in the source.

Since they're specific to the Visual Studio build, it's better
to disable them just in the project files where they always
apply to the correct toolchain.

I have only added the disable setting to project files which
need it currently: opus, test_opus_encode, and test_opus_decode.

This warning disable was conditional on _WIN32, which mingw
also defines, resulting in a warning about the unknown pragma
on gcc. Instead make it depend on something only the Visual
Studio compiler defines.

This reverts commit 43279728.

This reverts commit 715b37f6.

At a minimum MSVC warns on some of this stuff.

This avoids at least one case where ./autogen.sh && ./configure && make
will re-run configure because the makefile rules updated something that
it depends upon. Pulling a new version from git will change the version
so we should update that at the first step rather than iterating after
the last one.

Pedro Becerra authored 11 years ago and Jean-Marc Valin committed 11 years ago

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

More conservative surround masking
Disables temporal VBR on surround
Disables tonality on LFE

Centre channel now contributes sqrt(.5) to both channels
Reduces the stream offset at low bitrate