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115 commits

Author SHA1 Message Date
Jean-Marc Valin
84043f7cf7 Fixes a shift<0 issue in transient_analysis() 
Fixes a potential overflow in high-passed signal for transient detection
and ensures that the shift can never go negative
 2016-07-24 21:36:06 -04:00
Jean-Marc Valin
6fccb4b615 Adds some smoothing to the energy quantization 
When the energy is stable, we slightly bias energy quantization towards
the previous error to make the gain more stable (a constant offset is
better than fluctuations).

We reduce the bitrate by about 0.2% to 1% at low bitrate for the same quality.
 2016-07-19 16:11:50 -04:00
Jean-Marc Valin
7780d4a6b1 Retuning the tf_analysis() lambda 
Increasing the value at low rate seems to help a bit.
 2016-07-19 16:11:50 -04:00
Jean-Marc Valin
1484591656 Fixes equiv_rate for CBR 2016-07-19 16:11:50 -04:00
Jean-Marc Valin
2ca6df03df Minor TF cleanup (tf_sum was useless), plus comments 2016-07-19 16:11:50 -04:00
Jean-Marc Valin
f705e9b5bd Use SPREAD_AGGRESSIVE on non-transient hybrid frames 2016-07-19 16:11:50 -04:00
Jean-Marc Valin
8229f07d3b Don't use too much temporal resolution on hybrid frames at low rate 
Otherwise, we risk having "temporal holes" in the HF that anti-collapse
can't always fill in.
 2016-07-19 16:11:50 -04:00
Jean-Marc Valin
92d2492bfd Disable patch_transient_decision() on hybrid since it's causing artifacts 
It would trigger on the second frame of "S"s, causing holes in the spectrum
 2016-07-19 16:11:50 -04:00
Jean-Marc Valin
78fc664c0c Boosting the high-band bitrate on transients for hybrid mode 2016-07-17 15:05:54 -04:00
Jean-Marc Valin
61714e9edb Quality: Increase CELT rate for voiced frames in hybrid mode 2016-07-17 15:05:54 -04:00
Jean-Marc Valin
7e0ca4337f Using "hybrid" flag instead of "start!=0" 2016-07-15 17:51:45 -04:00
Jean-Marc Valin
bcd6abad43 Quality: Makes real CELT VBR work for hybrid too 2016-07-15 17:51:45 -04:00
Jean-Marc Valin
0247d34d6a Quality: Forces trim to 5 on hybrid mode 
This saves bits and makes more sense since alloc_trim_analysis()
mostly looks at the lower bands that are coded with SILK
 2016-07-15 17:51:45 -04:00
Jean-Marc Valin
59618a5fa2 Quality: removes VBR attenuation at low bitrate 
Turns out that even low bitrates benefit from VBR
 2016-07-15 17:51:45 -04:00
Jean-Marc Valin
b66080a879 Fixes minor code quality issues in CELT 
Reported by Durandal.
 2016-06-20 12:11:05 -04:00
Jean-Marc Valin
b370a938ca Fixes an overflow in the constrained VBR code for bitrate>64000 2016-06-17 20:58:30 -04:00
Jean-Marc Valin
99618099ab Fixes patch_transient_decision() for hybrid mode 
...and also make it not ignore the right channel
 2015-12-23 16:14:11 -05:00
Jean-Marc Valin
eda57aa386 Fixes the transient detector on silence 
Previously silence would cause the divide approximation on 0/0 to return a
very large value, which would be interpreted as a transient
 2015-12-04 13:45:57 -05:00
Viswanath Puttagunta
19c5406cde armv7(float): Optimize decode usecase using NE10 library 
Optimize opus decode (float only) use case using ARM NE10.
Mainly effects opus_ifft and ctl_mdct_backward and related
functions.

Work based on previous Encode optimization using ARM NE10
library. See previous commit for details on how to enable
this.

Signed-off-by: Timothy B. Terriberry <tterribe@xiph.org>
 2015-10-07 18:09:20 -04:00
Viswanath Puttagunta
f48abe8308 armv7(float): Optimize encode usecase using NE10 library 
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>
 2015-10-07 18:09:20 -04:00
Jonathan Lennox
43120f0075 Reorganize x86 SSE intrinsics code. 
Enable x86 intrinsics when building in floating-point mode.
Support SSE as an arch value.
Use RTCD to conditionally enable existing floating-point Celt SSE code.
Call functions directly (without RTCD) when their architecture can be presumed.
Use SSE4.1 intrinsics optimized code for Silk even in floating-point mode.
 2015-09-01 17:21:31 -04:00
Timothy B. Terriberry
23f503ad1c Fix warnings in pedantic build. 
This should suppress our current issues with unused parameters,
 unused variables, and set-but-not-used variables.
 2014-12-26 08:31:39 -08:00
xiangmingzhu
c95c9a048f Cisco optimization for x86 & fixed point 
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>
 2014-10-03 21:16:00 -04:00
Gregory Maxwell
6d2d5c424d Suppress some coverity false positives. 2014-04-16 18:29:26 -07:00
Jean-Marc Valin
ce1173c77f Fixes use of uninitialized values in dynalloc_analysis() 2014-01-20 18:46:33 -05:00
Jean-Marc Valin
379af35fd4 Minor cleanup in dynalloc_analysis() 2014-01-19 01:42:04 -05:00
Jean-Marc Valin
05548fa1c1 Adds a median filter to make dynalloc_analysis() more conservative 
This should prevent extreme dynalloc behaviour in cases where some
bands are heavily attenuated.
 2014-01-19 01:32:53 -05:00
Jean-Marc Valin
bdc7b93358 Reduces decoder stack usage by only storing one channel of denormalized MDCT 2014-01-06 08:58:38 -05:00
Jean-Marc Valin
4a6744a446 Some cleaning up of the synthesis code. 2014-01-05 21:40:02 -05:00
Jean-Marc Valin
e1f846208e Minor cleanup -- nothing to see here 2013-12-29 18:45:49 -05:00
Jean-Marc Valin
306d7f5a30 fixed-point: slight (but free) accuracy improvement in compute_band_energies() 
Also moves the VSHR32() condition outside the loop just in case some compilers
don't optimize that properly.
 2013-12-16 01:08:21 -05:00
Jean-Marc Valin
4a168eb343 Remove useless code in alloc_trim_analysis() 2013-12-11 01:34:06 -05:00
Jean-Marc Valin
91f8010108 Removing indirections 2013-12-10 22:09:33 -05:00
Pedro Becerra
a9b7def9f5 s/MAX16/MAX32/ in transient_analysis() 
Signed-off-by: Jean-Marc Valin <jmvalin@jmvalin.ca>
 2013-12-09 16:08:29 -05:00
Jean-Marc Valin
57cd849cf7 Defining celt_inner_prod() and using it instead of explicit loops. 
Also adds an SSE-optimized celt_inner_prod().
 2013-12-09 15:26:58 -05:00
Jean-Marc Valin
ff072009fe Replaces inline copies and initialization with OPUS_*() macros. 
This is a bit faster at -O2 because memcpy()/memmove()/memset() are
vectorized. The code is also cleaner.
 2013-12-09 15:26:52 -05:00
Jean-Marc Valin
c94e4bb103 Optimizes encoder NaN detection and clipping by only running them when needed 
NaN detection should now be able to catch values that would create NaNs
further down.
 2013-12-09 15:26:03 -05:00
Jean-Marc Valin
5626908ec3 Fixed-point fast-path for normal 48 kHz encoding in celt_preemphasis() 2013-12-05 16:40:59 -05:00
Jean-Marc Valin
aed1009df9 Turns a 16x32 multiply into a 16x16 one in celt_preemphasis(). 2013-12-05 13:36:48 -05:00
Jean-Marc Valin
96408b6295 Fixes Opus-custom preemphasis 
Also adds denorm avoidance for non-48 kHz rates
 2013-12-02 20:02:37 -05:00
Jean-Marc Valin
086ea7c7e5 Whoa! This fixes a pretty bad fixed-point stereo regression 2013-11-29 16:47:52 -05:00
Jean-Marc Valin
d6eb9c468f Silences a warning in fixed-point 2013-11-25 22:33:43 -05:00
Jean-Marc Valin
2924af4db0 Merges surround and stereo intensity stereo thresholds again. 
The different results for surround were mostly due to a bug in squishyball.
 2013-11-25 21:24:30 -05:00
Jean-Marc Valin
a47d6f308f Intensity stereo update, partially based on Monty's listening 
Intensity stereo is now based on equiv_rate and should no longer oscillate
in hybrid mode. Also, there is now a separate set of thresholds for
surround tuned by Monty. The non-surround thresholds were also updated at
low bitrate to be closer to what Monty found for surround.
 2013-11-25 00:03:31 -05:00
Jean-Marc Valin
41e8906cd6 opus_custom_encoder_init() now only needed for custom modes. 2013-11-20 19:34:14 -05:00
Timothy B. Terriberry
39386e0b85 Adds Neon assembly for correlation/convolution 
Optimizing celt_pitch_xcorr()/xcorr_kernel() which also speeds up
FIRs, IIRs and auto-correlations

Signed-off-by: Jean-Marc Valin <jmvalin@jmvalin.ca>
 2013-11-18 13:41:17 -05:00
Jean-Marc Valin
1b28e0cae5 Oops, missing semicolon on RESTORE_STACK in previous commit 2013-11-15 01:57:25 -05:00
Jean-Marc Valin
e83d2aa3f7 Adds missing RESTORE_STACKs in celt_encode_with_ec() 2013-11-15 01:52:28 -05:00
Jean-Marc Valin
2dc27dfa13 Rename preemphasis() to celt_preemphasis() to avoid amrnb symbol clash 
http://lists.xiph.org/pipermail/opus/2013-November/002372.html
 2013-11-13 23:18:26 -05:00
Jean-Marc Valin
ab86a9cca7 Fixes more warnings 2013-11-13 23:06:25 -05:00