Squashed commit of the following:

commit a2cc77cb2744a2cb0551b9bfdf06b97457b6d449
Author: Jean-Marc Valin <jean-marc.valin@octasic.com>
Date:   Thu Nov 4 13:11:21 2010 -0400

    Adding a switch to enable the post-filter (off by default)

commit 8e860dc0dfbe57e59fcbd5352588c5edff020e27
Author: Jean-Marc Valin <jean-marc.valin@octasic.com>
Date:   Thu Nov 4 11:57:12 2010 -0400

    Allowing pitches up to 3000 Hz

commit 837412d37bbca32bb34bfb5941e132ff4b0a568c
Author: Jean-Marc Valin <jean-marc.valin@usherbrooke.ca>
Date:   Wed Nov 3 20:47:11 2010 -0400

    Pitch estimation tuning to prevent some cases of pitch halving

commit 34e20f24c85b40fffd1a15c5b632f2f78b26f081
Author: Jean-Marc Valin <jean-marc.valin@octasic.com>
Date:   Wed Nov 3 16:31:51 2010 -0400

    Resynthesis now purely a compile-time option with RESYNTH

commit d83fb5a9cc2ec4b6cce938662997643da1c5ed0d
Author: Jean-Marc Valin <jean-marc.valin@octasic.com>
Date:   Wed Nov 3 16:28:25 2010 -0400

    Fixes a divide by zero in remove_doubling()

commit bb91e05b7f8f91fd15a8a0daae3d8cb6bd8d81db
Author: Jean-Marc Valin <jean-marc.valin@octasic.com>
Date:   Wed Nov 3 15:55:48 2010 -0400

    Bring back resynthesis with RESYNTH macro

commit 31fe6f6b4997af0a46b8c62f523fe2dfdb7f56ae
Author: Jean-Marc Valin <jean-marc.valin@octasic.com>
Date:   Tue Nov 2 17:55:04 2010 -0400

    Tuning the allocation tilt to give more bits to higher frequencies.

    Especially useful now that the post-filter can reduce low freq noise.

commit 919ba48f0369a87885334756cdfac2a448ce52d0
Author: Jean-Marc Valin <jean-marc.valin@octasic.com>
Date:   Mon Nov 1 17:27:19 2010 -0400

    C89 fix

commit ee0dbb1855a82ee8c132ddaffcab4d072bb3455e
Author: Jean-Marc Valin <jean-marc.valin@octasic.com>
Date:   Mon Nov 1 11:45:10 2010 -0400

    Complete fixed-point port of the pitch code (I think).

commit 4c7b3fd12a8f7469607b5ac57c85301a5de9fa81
Author: Jean-Marc Valin <jean-marc.valin@octasic.com>
Date:   Mon Nov 1 10:55:43 2010 -0400

    More fixed-point pitch gain work

commit 26f1412188900199b63e187fcb0bd04db53c898a
Author: Jean-Marc Valin <jean-marc.valin@octasic.com>
Date:   Mon Nov 1 10:39:25 2010 -0400

    Fixed-point version of the pitch gain calculation code

commit 27c73d008e9f50d282c3ad08e2f05f7006013ae1
Author: Jean-Marc Valin <jean-marc.valin@usherbrooke.ca>
Date:   Sun Oct 31 16:50:26 2010 -0400

    Some more fixed-point work in remove_doubling()

commit 59354672cb3af794a0e46c0b2097d6441c75cdd1
Author: Jean-Marc Valin <jean-marc.valin@usherbrooke.ca>
Date:   Sun Oct 31 09:57:36 2010 -0400

    Fixed a stupid fixed-point pf bug in the gain handling

commit be9e7dabf6c8b32bc049da260b58ff6085dc1ac3
Author: Jean-Marc Valin <jean-marc.valin@usherbrooke.ca>
Date:   Sat Oct 30 01:52:09 2010 -0400

    Fixed-point: fixed frac_div32() that was broken a few commits ago.

commit 5b06270afc41a88915252cea14411be43650e704
Author: Jean-Marc Valin <jean-marc.valin@octasic.com>
Date:   Fri Oct 29 17:45:44 2010 -0400

    This fixes VBR when encoding the pitch period with raw bits

commit 10e0488458ae558aa80d0b30cce70841ad081f73
Author: Jean-Marc Valin <jean-marc.valin@octasic.com>
Date:   Fri Oct 29 16:50:31 2010 -0400

    Pitch period is now encoder with equal probability for each octave (rather than each lag).

    Max pitch gain allowed is now 0.625.

commit ca19396c1c1511c0e208b400efb51384fc7c200d
Author: Jean-Marc Valin <jean-marc.valin@octasic.com>
Date:   Fri Oct 29 16:00:01 2010 -0400

    More fixed-point post-filter work

commit f3e42fde1b575bc587b2557b8b31a6085421a99c
Author: Jean-Marc Valin <jean-marc.valin@octasic.com>
Date:   Fri Oct 29 14:39:23 2010 -0400

    More fixed-point work for the prefilter/postfilter

commit db945132d12b25ff25acc0701b91a1d8a81417d5
Author: Jean-Marc Valin <jean-marc.valin@octasic.com>
Date:   Fri Oct 29 14:14:02 2010 -0400

    Making the pitch estimation work in fixed-point

    Even if there's still lots of float operations left.

commit acb3f96e04802ac4601295f83bef1f32593e261a
Author: Jean-Marc Valin <jean-marc.valin@octasic.com>
Date:   Fri Oct 29 10:57:39 2010 -0400

    Making the PLC code consistent with the prefilter/postfilter

commit 8f64f5974ac846b8c35d0b692e0472f279206cf0
Author: Jean-Marc Valin <jean-marc.valin@usherbrooke.ca>
Date:   Thu Oct 28 00:33:53 2010 -0400

    More tuning for remove_doubling()

commit 0c08f2ee9dcc135dd222fef30f5ad93e95e0d364
Author: Jean-Marc Valin <jean-marc.valin@octasic.com>
Date:   Wed Oct 27 17:48:02 2010 -0400

    Doing an interpolation step to improve the accuracy of the pitch estimate

    Also increasing the gain slightly.

commit 23d303e992f1fdc3d2668652603ae6311d3b91c5
Author: Jean-Marc Valin <jean-marc.valin@octasic.com>
Date:   Wed Oct 27 16:56:42 2010 -0400

    Implements a fixed 3-tap prefilter/postfilter to make the gain roll off with frequency

commit 881c5928adc1af9eb75c4b68e9eba94ab1d65adc
Author: Jean-Marc Valin <jean-marc.valin@octasic.com>
Date:   Wed Oct 27 14:47:30 2010 -0400

    Partially whitening the down-sampled signal before the pitch search

commit 4a8687deea8587007f14051cb966f6fd748893a1
Author: Jean-Marc Valin <jean-marc.valin@octasic.com>
Date:   Wed Oct 27 14:27:47 2010 -0400

    pitch_search() no longer computes the gain

commit a7f85bb6b10d9c509caec521ca444efb3f27df05
Author: Jean-Marc Valin <jean-marc.valin@octasic.com>
Date:   Wed Oct 27 14:00:53 2010 -0400

    remove_doubling() now works on the down-sampled signal

commit 06cb70e876873f79fed214ebbca35cb4c5057ec8
Author: Jean-Marc Valin <jean-marc.valin@octasic.com>
Date:   Wed Oct 27 11:28:53 2010 -0400

    Simplification to the pitch continuity code

commit 5201927c284a424eb8f21f63d358844b3de8c285
Author: Jean-Marc Valin <jean-marc.valin@octasic.com>
Date:   Wed Oct 27 11:04:02 2010 -0400

    Some more pitch doubling prevention code

commit 7ef63fbe1f78f79e1923bc42e06fbdf1ec28ffd3
Author: Jean-Marc Valin <jean-marc.valin@usherbrooke.ca>
Date:   Wed Oct 27 06:49:28 2010 -0400

    Minor fix

commit eb37eaab32e7df074a7ddf0ae4781e57f827c4ad
Author: Jean-Marc Valin <jean-marc.valin@octasic.com>
Date:   Tue Oct 26 18:32:25 2010 -0400

    Enforcing some pitch continuity

commit 751ef6edf2ee7721252cedb264bdf9b3f6244a9d
Author: Jean-Marc Valin <jean-marc.valin@octasic.com>
Date:   Tue Oct 26 17:29:47 2010 -0400

    Code for preventing pitch doubling/halving

commit c12647ecb55b645005efbeede91880db72936f8d
Author: Jean-Marc Valin <jean-marc.valin@usherbrooke.ca>
Date:   Tue Oct 26 00:04:34 2010 -0400

    Finally getting perfect reconstruction when pitch changes

    Post-filter now delays the filter coefs by the overlap so that the pre-filter
    and post-filter are synchronised.

commit f854311d945bb375039a4a4a4fea782b648581f8
Author: Jean-Marc Valin <jean-marc.valin@octasic.com>
Date:   Mon Oct 25 14:59:13 2010 -0400

    Very simple/inefficient signalling of the prefilter period/gain

commit b4e1215432e3d89a29c998639a6d8b07e28c5a2a
Author: Jean-Marc Valin <jean-marc.valin@octasic.com>
Date:   Mon Oct 25 14:09:17 2010 -0400

    using the actual pitch gain

commit e7cd4f07bb073b6955a001e56c0bbf16156f4195
Author: Jean-Marc Valin <jean-marc.valin@octasic.com>
Date:   Mon Oct 25 12:16:11 2010 -0400

    Adding some pitch prediction though side information still isn't coded

commit 77a03aa27c9b6ed2fe80c27a1196b460ccb5079e
Author: Jean-Marc Valin <jean-marc.valin@usherbrooke.ca>
Date:   Mon Oct 25 00:12:48 2010 -0400

    prefilter implemented as well

commit a3fd81b6ca213d4a9f8ddfa2883fd0e238d64d04
Author: Jean-Marc Valin <jean-marc.valin@usherbrooke.ca>
Date:   Sun Oct 24 01:14:10 2010 -0400

    Implementing Raymond Chen's comb filter idea

    So far, only the post-filter is there.

1 files changed, 7 insertions, 0 deletions

diff --git a/configure.ac b/configure.ac
index fdad7bb..8037120 100644
--- a/configure.ac
+++ b/configure.ac
@@ -117,6 +117,13 @@ AC_ARG_ENABLE(fixed-point-debug, [  --enable-fixed-point-debug  debug fixed-poin
   AC_DEFINE([FIXED_DEBUG], , [Debug fixed-point implementation])
 fi])
 
+ac_enable_experimental_postfilter="no"
+AC_ARG_ENABLE(experimental-postfilter, [  --enable-experimental-postfilter     Enable this for testing only if you know what you're doing ],
+[if test "$enableval" = yes; then
+  ac_enable_experimental_postfilter="yes"
+  AC_DEFINE([ENABLE_POSTFILTER], , [Postfilter])
+fi])
+
 float_approx=$has_float_approx
 AC_ARG_ENABLE(float-approx, [  --enable-float-approx   enable fast approximations for floating point],
     [ if test "$enableval" = yes; then