Robin Gareus ee97942165 use accurate log10 for meter (fast_log2 is unsuitable inaccurate)
fast_coefficient_to_dB() returns a lower bound value, unsuitable
to catch audio peaks. The difference to 20*log10 is as large as 0.4 dB!

The effective speedup of fast_log10 compared to log10f is marginal
(sweep of all 24bit values)

  i686 (1.6GHz Intel core):  2.36 [times faster]
  x86_64 (core2 2.4GHz):     1.63
  x86_64 (I3 2.80GHz):       2.03

the execution time of one log10f() averaged over a
sweep of all 24 bit values

  i686 (1.6GHz Intel core):  0.131 usec
  x86_64 (core2 2.4GHz):     0.033 usec
  x86_64 (I3 2.80GHz):       0.044 usec

PeakMeter::run() is called from dedicated non-rt, no harm done.
2013-07-10 15:27:15 +02:00
2013-02-23 17:44:53 +00:00
2013-06-14 18:15:05 +02:00
2009-11-09 14:13:59 +00:00
2013-03-12 13:32:56 -04:00
2005-05-13 20:47:18 +00:00
2013-03-13 14:35:39 -04:00
2011-11-21 23:21:05 +00:00

Please see the Ardour web site at http://ardour.org/ for all documentation..

For information on building ardour: 
      
     http://ardour.org/development.html
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