Mercurial > hg > svcore
view data/model/PowerOfTwoZoomConstraint.cpp @ 378:a38cd7823cb2
* PortAudio driver: do not specify frames per buffer, let PA decide
* Remove old non-RubberBand time stretcher -- it doesn't work with varying
buffer sizes such as the PA driver may now be using
* Rewrite getCurrentPlayingFrame for greater correctness when using long
buffer sizes (interpolating according to audio stream timestamp)
* Several changes to make the timestretch management RT safe(r)
author | Chris Cannam |
---|---|
date | Fri, 08 Feb 2008 17:51:15 +0000 |
parents | 3a13b0d4934e |
children | 59e7fe1b1003 |
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/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */ /* Sonic Visualiser An audio file viewer and annotation editor. Centre for Digital Music, Queen Mary, University of London. This file copyright 2006 Chris Cannam. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. See the file COPYING included with this distribution for more information. */ #include "PowerOfTwoZoomConstraint.h" size_t PowerOfTwoZoomConstraint::getNearestBlockSize(size_t req, RoundingDirection dir) const { size_t result = 0; for (size_t bs = 1; ; bs *= 2) { if (bs >= req) { if (dir == RoundNearest) { if (bs - req < req - bs/2) { result = bs; break; } else { result = bs/2; break; } } else if (dir == RoundDown) { result = bs/2; break; } else { result = bs; break; } } } if (result > getMaxZoomLevel()) result = getMaxZoomLevel(); return result; }