[opus] Make check failure on clone from 31 January

[Marcello Caramma (mcaramma)]

Hi,

Apologies if this is a known issue, but running make on revision e3187444692195957eb66989622c7b1ad8448b06 fails one of the tests when using fixed point configuration (floating point is ok) on my linux x86.
Note that libopus1.1, as extracted from the tar ball, is OK.

Specifically, the tests that fail are in celt/tests/test_unit_mdct:
nfft=32 inverse=0,snr = 85.341197
nfft=32 inverse=1,snr = 96.285703
nfft=256 inverse=0,snr = 86.726515
nfft=256 inverse=1,snr = 87.308386
nfft=512 inverse=0,snr = 82.577935
nfft=512 inverse=1,snr = 87.103849
nfft=1024 inverse=0,snr = 84.950837
nfft=1024 inverse=1,snr = 87.105776
nfft=2048 inverse=0,snr = 84.749139
nfft=2048 inverse=1,snr = 87.243518
nfft=36 inverse=0,snr = 84.424292
nfft=36 inverse=1,snr = 0.217968
** poor snr: 0.217968 **
nfft=40 inverse=0,snr = 83.806898
nfft=40 inverse=1,snr = 87.400185
nfft=60 inverse=0,snr = 84.981677
nfft=60 inverse=1,snr = 12.874762
** poor snr: 12.874762 **
nfft=120 inverse=0,snr = 82.344266
nfft=120 inverse=1,snr = 84.955920
nfft=240 inverse=0,snr = 83.273247
nfft=240 inverse=1,snr = 85.040479
nfft=480 inverse=0,snr = 83.702884
nfft=480 inverse=1,snr = 84.168293
nfft=960 inverse=0,snr = 84.481005
nfft=960 inverse=1,snr = 83.929637
nfft=1920 inverse=0,snr = 83.974087
nfft=1920 inverse=1,snr = 84.177282
FAIL: celt/tests/test_unit_mdct

Running bisect on the repository gives: 

e43a0abe0a908603a71b0c35e8c2307a77a7211f is the first bad commit
commit e43a0abe0a908603a71b0c35e8c2307a77a7211f
Author: Jean-Marc Valin <jmvalin at jmvalin.ca>
Date:   Fri Dec 27 00:10:54 2013 -0500

    Removes the separate 1/8N rotation in the (I)MDCT and unmerges the MDCT sizes
    
    Undoes commits f7547a4e and 72513f3c


This is what I used to configure:
../configure --prefix=$HOME/opus_install  --enable-fixed-point

These are the details of my system:

uname -a
Linux mcdebian 2.6.32-5-686 #1 SMP Mon Feb 25 01:04:36 UTC 2013 i686 GNU/Linux

Best regards,

Marcello Caramma