Mercurial > hg > svcore
view data/model/RangeSummarisableTimeValueModel.h @ 266:2268963dabd1
* FFT: fix invalid write of normalisation factor in compact mode of disc cache
* FFT: fix range problem for normalisation factor in compact mode (it was
stored as an unsigned scaled from an assumed float range of 0->1, which
is not very plausible and not accurate enough even if true -- use a float
instead)
* Spectrogram: fix vertical zoom behaviour for log frequency spectrograms:
make the thing in the middle of the display remain in the middle after zoom
* Overview widget: don't update the detailed waveform if still decoding the
audio file (too expensive to do all those redraws)
author | Chris Cannam |
---|---|
date | Fri, 08 Jun 2007 15:19:50 +0000 |
parents | 185454896a76 |
children | c022976d18e8 |
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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. */ #ifndef _RANGE_SUMMARISABLE_TIME_VALUE_MODEL_H_ #define _RANGE_SUMMARISABLE_TIME_VALUE_MODEL_H_ #include <QObject> #include "DenseTimeValueModel.h" #include "base/ZoomConstraint.h" /** * Base class for models containing dense two-dimensional data (value * against time) that may be meaningfully represented in a zoomed view * using min/max range summaries. Audio waveform data is an obvious * example: think "peaks and minima" for "ranges". */ class RangeSummarisableTimeValueModel : public DenseTimeValueModel { Q_OBJECT public: struct Range { float min; float max; float absmean; Range() : min(0.f), max(0.f), absmean(0.f) { } Range(const Range &r) : min(r.min), max(r.max), absmean(r.absmean) { } Range(float min_, float max_, float absmean_) : min(min_), max(max_), absmean(absmean_) { } }; typedef std::vector<Range> RangeBlock; /** * Return ranges between the given start and end frames, * summarised at the given block size. ((end - start + 1) / * blockSize) ranges should ideally be returned. * * If the given block size is not supported by this model * (according to its zoom constraint), also modify the blockSize * parameter so as to return the block size that was actually * obtained. */ virtual void getRanges(size_t channel, size_t start, size_t end, RangeBlock &ranges, size_t &blockSize) const = 0; /** * Return the range between the given start and end frames, * summarised at a block size equal to the distance between start * and end frames. */ virtual Range getRange(size_t channel, size_t start, size_t end) const = 0; }; #endif