This is a bit faster at -O2 because memcpy()/memmove()/memset() are
vectorized. The code is also cleaner.

NaN detection should now be able to catch values that would create NaNs
further down.

This also splits the rate adjustment between SILK and CELT (previous
code only changed SILK)

Still needs more tuning

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

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

Mark Harris authored 11 years ago and Jean-Marc Valin committed 11 years ago

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

These are all completely untested.

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>

Works by turning off pitch and energy prediction in CELT, while
setting first_frame_after_reset in SILK to disable pitch and LSF interpolation
and reduce LPC gain.

The problem was that forcing CELT-mode for low bitrate CBR was done too late,
after the encoder had decided to use SILK. This was causing redundancy
to be allocated because the encoder didn't realize it was going to keep
using CELT.

Padding is now handled by the repacketizer.

Mark Harris authored 11 years ago and Jean-Marc Valin committed 11 years ago

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

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

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.

Stereo mode, stereo width, min bandwidth, VBR damping

Because it's indirectly used in the encoder (through the repackerizer).