Timothy B. Terriberry
39386e0b85
Adds Neon assembly for correlation/convolution
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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
02fed471a4
Implements fixed-point silk_LPC_analysis_filter() in terms of celt_fir()
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Saves 2.5% on ARM without any asm. The float build still uses the old
code because celt_fir() then becomes a float function.
2013-08-29 15:29:02 -04:00
Jean-Marc Valin
6a7ee7fb55
Share auto-correlation code between SILK and CELT
2013-08-28 17:55:34 -04:00
Jean-Marc Valin
71766ef7a4
Avoids symbol clashes with Speex (pitch_xcorr) and libm (y1)
2013-06-17 00:44:12 -04:00
John Ridges
e50e8084a9
Improved SSE version of xcorr_kernel()
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The loop no longer reads past its buffer and is slightly faster.
Also fixes RESTORE_STACK in celt_iir().
2013-06-06 23:12:57 -04:00
Jean-Marc Valin
0fed074b04
C89 fix
2013-05-26 20:29:44 -04:00
Jean-Marc Valin
068cbd89bf
Creates xcorr_kernel() that gets used by pitch_xcorr, celt_fir and celt_iir.
2013-05-26 20:11:44 -04:00
Jean-Marc Valin
0fa5fa88e9
Adds missing RESTORE_STACK calls
2013-05-25 18:50:01 -04:00
Jean-Marc Valin
531cf591e6
Speeds up celt_iir() by more than a factor of two.
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Again, this only impacts the PLC and we assume the order is a multiple of 4.
2013-05-25 07:41:55 -04:00
Jean-Marc Valin
e2374a8ec2
Speeds up celt_fir by more than a factor of two.
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Only impacts the PLC. We now assume that the order is a multiple of 4.
2013-05-25 04:25:54 -04:00
Jean-Marc Valin
e8e57a32f6
Optimizes _celt_autocorr() by using pitch_xcorr()
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Computes most of the auto-correlation by reusing pitch_xcorr(). We only
need lag*(lag-1)/2 MACs to complete the calculations.
To do this, pitch_xcorr() was modified so that it no longer truncates the
length to a multiple of 4. Also, the xcorr didn't need the floor at -1.
As a side benefit, this speeds up the PLC, which uses a higher order LPC
filter.
2013-05-25 02:14:25 -04:00
Timothy B. Terriberry
7c74bc3930
Remove an unused variable added in 85ede2c6.
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Thanks to John Ridges for the report.
2013-05-23 13:00:28 -07:00
Timothy B. Terriberry
85ede2c6aa
Use more MAC16_16's and unroll a loop.
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This splits out the non-arch-specific portions of a patch written
by Aurélien Zanelli <aurelien.zanelli@parrot.com
http://lists.xiph.org/pipermail/opus/2013-May/002088.html
I also added support for odd n, for custom modes.
0.25% speedup on 96 kbps stereo encode+decode on a Cortex A8.
2013-05-22 15:32:50 -07:00
Jean-Marc Valin
cb05e7cd96
s/FOUNDATION/COPYRIGHT OWNER/ in CELT code and "glue code"
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Also added 3rd clause to "master" COPYING file
2012-04-20 16:41:42 -04:00
Jean-Marc Valin
e1be1920ba
Some minor (non-bitstream-affecting) changes to help us have better test vectors
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These fix corner cases discovered during the latest fuzzing tests.
2011-11-28 22:48:01 -05:00
Jean-Marc Valin
2779df7ff6
Renaming the CELT plc.c file to celt_lpc.c to avoid MSVC conflicts with Skype's PLC.c
2011-10-04 13:31:54 -04:00
