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Author SHA1 Message Date
Jean-Marc Valin
ca53b7c919 Squashed commit of the following: 
commit ea807b68678dd76175def2c5eb006c6bdb16679e
Author: Jean-Marc Valin <jean-marc.valin@usherbrooke.ca>
Date:   Wed Mar 25 23:24:41 2009 -0400

    cleanup before merge

commit 73ad1a0202641be6a23903e464ece21fe332a131
Author: Jean-Marc Valin <jean-marc.valin@usherbrooke.ca>
Date:   Sat Mar 21 00:02:16 2009 -0400

    Some tuning of the new stereo

commit c05057eb57a7723045214a2f830fd561388ae48a
Author: Jean-Marc Valin <jean-marc.valin@usherbrooke.ca>
Date:   Sun Mar 15 19:56:11 2009 -0400

    fixed-point: atan2() converted

commit a8476cf8be55b0612d42df98d9807ca1335adfe3
Author: Jean-Marc Valin <jean-marc.valin@usherbrooke.ca>
Date:   Sat Mar 14 23:10:04 2009 -0400

    fixed-point: Getting the new stereo code working in fixed-point (still more
    work left)

commit 70a452761a5ce15700664e7167886dce5914cbd0
Author: Jean-Marc Valin <jean-marc.valin@usherbrooke.ca>
Date:   Mon Mar 2 23:36:25 2009 -0500

    Coding left and right independently for lower bands

commit 4efd1e6385c7d036749080265a8d26668312b91b
Author: Jean-Marc Valin <jean-marc.valin@usherbrooke.ca>
Date:   Sun Mar 1 23:56:46 2009 -0500

    Removed the sqrt(C) from the normalisation, which simplifies a lot of things.

commit a4f3c5c60bc396bf644afa49b49e6b24ccf144f8
Author: Jean-Marc Valin <jean-marc.valin@usherbrooke.ca>
Date:   Fri Feb 20 20:49:38 2009 -0500

    Better point stereo calculation when we don't encode the side anyway

commit f08525de4739f4017d19ec2e2022883deda8f826
Author: Jean-Marc Valin <jean-marc.valin@usherbrooke.ca>
Date:   Thu Feb 19 19:43:09 2009 -0500

    Apparently, Timothy's calculations for fine energy allocation also apply
    to the quantisation of theta.

commit 6548cffc9d3f996b8a8dbfab982f0da0bc6c2dc2
Author: Jean-Marc Valin <jean-marc.valin@usherbrooke.ca>
Date:   Thu Feb 19 07:35:24 2009 -0500

    Better handling of the "theta bits" and disabling the orthogonalize()

commit 7aa82c694967afa85dd30be8cc670663f98829fe
Author: Jean-Marc Valin <jean-marc.valin@usherbrooke.ca>
Date:   Wed Feb 18 08:01:07 2009 -0500

    tuning the new stereo

commit c2b780a773de66fd9613c7cd54c09b705fe9ce45
Author: Jean-Marc Valin <jean-marc.valin@usherbrooke.ca>
Date:   Sun Feb 15 22:24:52 2009 -0500

    The new stereo coupling actually decodes properly now.

commit 85513c203d773bebcf0a6055f953170d563d890c
Author: Jean-Marc Valin <jean-marc.valin@usherbrooke.ca>
Date:   Sun Feb 15 21:31:16 2009 -0500

    First attempt at a new "constrained" MS stereo scheme
 2009-03-26 20:23:14 -04:00
Jean-Marc Valin
5c3bc67959 Fixed a bunch of fixed-point overflows on insanely hot signals by changing 
the time-domain representation from Q14 to Q12 (Q29 to Q27 using the
standard convention).
 2008-08-28 23:34:24 -04:00
Jean-Marc Valin
558c50eb3d optimisation: Making it clear to the compiler that many of the loops in cwrs 
need to iterate at least once.
 2008-04-16 14:15:07 +10:00
Jean-Marc Valin
d568303134 optimisation: simplified the "full gain" case of alg_quant() to remove some 
32-bit muls.
 2008-04-15 18:04:33 +10:00
Jean-Marc Valin
98c86c7885 Trying to clean up celt_ilog2() vs. EC_ILOG a bit. 2008-03-27 08:40:45 +11:00
Jean-Marc Valin
189acec5d3 optimisation: defined a reciprocal square root (celt_rsqrt) for use in 
find_spectral_pitch instead of using celt_rcp(celt_sqrt(x))
 2008-03-26 16:42:42 +11:00
Jean-Marc Valin
ac72c2821a oops. find_max32() now uses VERY_LARGE32 (instead of VERY_LARGE16) 2008-03-25 21:31:12 +11:00
Jean-Marc Valin
44c63350d1 optimisations: Another bunch of simplifications to alg_quant(), mainly to 
remove unnecessary copying and some conditional branches.
 2008-03-25 21:28:40 +11:00
Jean-Marc Valin
49134381d0 optimisations: caching sign of x in alg_quant(), changed celt_div()/celt_rcp() 
to assume denominator is positive.
 2008-03-25 16:07:05 +11:00
Jean-Marc Valin
17ad401c2c defined find_max16 and overrode it for C55x 2008-03-23 08:06:29 +11:00
Jean-Marc Valin
dc767f67f9 No longer trying to save bits when encoding integers near the upper limit 
(and fix for celt_div with 16-bit numerator on a 16-bit CPU)
 2008-03-22 22:23:58 +11:00
Jean-Marc Valin
2282383434 fixed-point: added cheap celt_div() division using a reciprocal 2008-03-22 21:17:45 +11:00
Jean-Marc Valin
9901cb9e82 fixed-point: defined celt_maxabs16() as basic operator 2008-03-21 11:13:51 +11:00
Jean-Marc Valin
83006eec60 fixed-point: using TI intrinsic for celt_ilog2() if available. 2008-03-21 10:40:43 +11:00
Jean-Marc Valin
4ff068e670 Some work on assertions. 2008-03-15 23:34:39 +11:00
Jean-Marc Valin
15b9be3a29 fixed-point: playing it safe. SHL32() now automatically casts input to 32-bit 
to prevent surprises. Also, a few comments.
 2008-03-14 17:58:33 +11:00
Jean-Marc Valin
19ae9fc944 fixed-point: simplifying the arithmetic in alg_quant() 2008-03-13 11:18:15 +11:00
Jean-Marc Valin
3ec78b173b More accurate sqrt approximation using MULT16_16_Q15() instead of Q14. 2008-03-12 23:00:42 +11:00
Jean-Marc Valin
887ad9ff29 Increased accuracy of the reciprocal approximation and made it use 
MULT16_16_Q15() instead of Q14 (should be faster).
 2008-03-12 21:34:50 +11:00
Jean-Marc Valin
931db72e75 Defined the celt_rcp() reciprocal approximation 2008-03-12 11:28:26 +11:00
Jean-Marc Valin
68b02b1025 fixed-point: copied the exp2 implementation from Speex, using it for dB2Amp() 2008-02-28 23:37:26 +11:00
Jean-Marc Valin
2eaba8ac1f fixed-point: log approximation 2008-02-28 22:14:54 +11:00
Jean-Marc Valin
3ca9b1d295 fixed-point: Moved sqrt and cos approximations to mathops.h 2008-02-27 23:50:31 +11:00