This is not strictly necessary because the only streams that cause these
already sound horrible, but it helps the testing process.

Koen Vos authored 13 years ago and Jean-Marc Valin committed 13 years ago

Also clamps the gain to avoid forcing a float decoder to emulate the
state rescaling.

Koen Vos authored 13 years ago and Jean-Marc Valin committed 13 years ago

decoder:
- fixed incorrect scaling of filter states for the smallest quantization
  step sizes
- NLSF2A now limits the prediction gain of LPC filters

encoder:
- increased damping of LTP coefficients in LTP analysis
- increased white noise fraction in noise shaping LPC analysis
- introduced maximum total prediction gain.  Used by Burg's method to
  exit early if prediction gain is exceeded.  This improves packet
  loss robustness and numerical robustness in Burg's method
- Prefiltered signal is now in int32 Q10 domain, from int16 Q0
- Increased max number of iterations in CBR gain control loop from 5 to 6
- Removed useless code from LTP scaling control
- Optimization: smarter LPC loop unrolling
- Switched default win32 compile mode to be floating-point

resampler:
- made resampler have constant delay of 0.75 ms; removed delay
  compensation from silk code.
- removed obsolete table entries (~850 Bytes)
- increased downsampling filter order from 16 to 18/24/36 (depending on
  frequency ratio)
- reoptimized filter coefficients

These fix corner cases discovered during the latest fuzzing tests.

Koen Vos authored 13 years ago and Jean-Marc Valin committed 13 years ago

- Calling the decoder for FEC when there's no LBRR should no longer crash
- There should no longer be an issue with the PLC on frame size switching

Koen Vos authored 13 years ago and Jean-Marc Valin committed 13 years ago

- compile warning in opus_decoder.c
- decoder state reduced by ~3 kB (by merging buffers, as Tim suggested)
- some minor decoder optimizations (only the PLC is non-bit exact, so should be ok)

Ralph Giles authored 13 years ago and Jean-Marc Valin committed 13 years ago

On MacOS, stdlib.h ends up including sys/signal.h, generating
warnings about the local variables called 'signal' shadowing
the global symbol signal(3). Tested with XCode 4.1 on
MacOS X 10.7.0.

The signal buffers passed in are generally frames being processed,
and the code already uses the term frame and frame_length elsewhere,
so I've resolved the warning by renaming signal and signal_* locals
and parameters to frame and frame_*.

Gregory Maxwell authored 13 years ago and Jean-Marc Valin committed 13 years ago

whitespace.

- Merged the LPC stabilization from NLSF2A_stable.c into NLSF2A.c
- The bandwidth expansion in NLSF2A() now operates on int32 LPC coefficients in
Q17 domain (instead of int16 Q12 coefficients)
- The function bwexpander_32() has a more precise way of updating the chirp
variable (round to nearest, instead of round down)
- Changed a few variables in NLSF_stabilize() from int16 to int32 to avoid signed
wrap-around (no difference in results as the wrap-around would always be reversed
later)
- The LSF codebook for WB speech has a quantization stepsize of 0.15 (was 0.16).
This doesn't break the bitstream, although it slightly limits quality of signals
encoded with the old version and decoded with the new one (I can't really hear it
and PESQ gives high scores as well).  I does improve handling of tonal signals.
- As discussed: the Q-domain of the poly function is now in Q16 (was Q20)
- As discussed: limiting the LSFs in NLSF_decode() to 0...32767
- The silk_NLSF_DELTA_MIN values were lowered to deal with a possible future situation with less or no input HP filtering.

commit 5b64cf7c4d67af9050bc959996ef976ce6326888
Author: Jean-Marc Valin <jean-marc.valin@octasic.com>
Date:   Thu May 19 16:40:35 2011 -0400

    Fixes a few bugs introduced in the latest update

commit b91eb86025d2de3c4cf04f4fb1aa48a28ad676a3
Author: Timothy B. Terriberry <tterribe@xiph.org>
Date:   Thu May 19 16:12:02 2011 -0400

    build_draft.sh fixes

commit 0b10c30db7ad60ff7d4bfc1139bdb86e0543c035
Author: Jean-Marc Valin <jean-marc.valin@octasic.com>
Date:   Thu May 19 15:30:21 2011 -0400

    Fixes the draft build

commit 164424cded5978e657105104e171ac202dde5e5b
Author: Jean-Marc Valin <jean-marc.valin@octasic.com>
Date:   Thu May 19 15:00:23 2011 -0400

    Updated build system

commit 188d9fcba8c3a1b1ad67c67c430e1b37e3658a40
Author: Koen Vos <koen.vos@skype.net>
Date:   Thu May 19 17:14:57 2011 -0400

    SILK/Opus update

Koen Vos authored 13 years ago and Jean-Marc Valin committed 13 years ago

commit c44b37355295df2963daa724649ff1876b690488
Author: Jean-Marc Valin <jean-marc.valin@usherbrooke.ca>
Date:   Wed Apr 27 00:33:12 2011 -0400

    decoder size fix

commit 78f864e9ddacd94d03d717d79a6e606712e25edd
Author: Jean-Marc Valin <jean-marc.valin@usherbrooke.ca>
Date:   Tue Apr 26 23:26:14 2011 -0400

    Makefile fix

commit a0e884e463af88bcaa2f410ea8cc85e5bebd2c3b
Author: Jean-Marc Valin <jean-marc.valin@usherbrooke.ca>
Date:   Tue Apr 26 22:53:27 2011 -0400

    Making some progress

commit 9e30457f2199bba7b5e37bb577ff75dc85ba9306
Author: Koen Vos <koen.vos@skype.net>
Date:   Tue Apr 26 22:29:42 2011 -0400

    SILK update with stereo support