xiangmingzhu authored 10 years ago and Jean-Marc Valin committed 10 years ago

1. Only for fixed point on x86 platform (32bit and 64bit, uses SIMD
   intrinsics up to SSE4.2)
2. Use "configure --enable-fixed-point --enable-intrinsics" to enable
   optimization, default is disabled.
3. Official test cases are verified and passed.

Signed-off-by: Timothy B. Terriberry <tterribe@xiph.org>

This saves 640 bytes on the peak stack usage.

Since the last patch originally had them mangled (presumably by
 mailer, http server, or something else), let's just get rid of
 them.

Timothy B. Terriberry authored 12 years ago and Jean-Marc Valin committed 12 years ago

This allows the decoder to be compiled with
 NONTHREADSAFE_PSEUDOSTACK to move the memory for large buffers off
 the stack for devices where it is very limited.
This patch only attempts to do this for the decoder.
The encoder still requires more than 10 kB of stack.

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

Also adds the encoder part of commit ee8adbe7 as well as a few
minor cleanups.

- Safer gain clamping for PLC
- Makes opus_decoder_get_nb_samples() report an error on invalid ToC
- Giving a free license to the text ofthe draft (not just the code)

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

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)

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

Simplifies mono/stereo switching in SILK
Fixes a quantization mismatch between encoder and decoder
Constrains the pitch lags in the same way in the encoder and decoder

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

Also some MSVC build fixes

Mainly implementing signed overflow behaviour in a way that isn't
undefined in the C standard

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

whitespace.

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

commit dfe4d46f9abf6b0e96e66370d428da4e283204ce
Author: Jean-Marc Valin <jean-marc.valin@octasic.com>
Date:   Mon May 2 09:59:45 2011 -0400

    SILK file list update

commit 5faf541d86445eb8ce1775ea206e88afe83c7107
Author: Jean-Marc Valin <jean-marc.valin@octasic.com>
Date:   Mon May 2 09:51:29 2011 -0400

    Makefiles update

commit f5d70b3ccbe209cc07a1a604fffca93ea34bc64b
Author: Koen Vos <koen.vos@skype.net>
Date:   Mon May 2 09:50:33 2011 -0400

    SILK stereo update and MSVC build update

commit 7721daf733c6986cb2c2511c81e6fc14fea1ec6a
Author: Jean-Marc Valin <jean-marc.valin@octasic.com>
Date:   Mon Feb 28 16:00:52 2011 -0500

    Makefile.am update

commit 47dcc4edad849f57240b0c364036a378b5d22a9a
Author: Koen Vos <koen.vos@skype.net>
Date:   Mon Feb 28 15:46:23 2011 -0500

    SILK update (prefill, new LSF quant)