annotate data/fft/FFTCacheWriter.h @ 537:3cc4b7cd2aa5

* Merge from one-fftdataserver-per-fftmodel branch. This bit of reworking (which is not described very accurately by the title of the branch) turns the MatrixFile object into something that either reads or writes, but not both, and separates the FFT file cache reader and writer implementations separately. This allows the FFT data server to have a single thread owning writers and one reader per "customer" thread, and for all locking to be vastly simplified and concentrated in the data server alone (because none of the classes it makes use of is used in more than one thread at a time). The result is faster and more trustworthy code.
author Chris Cannam
date Tue, 27 Jan 2009 13:25:10 +0000
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children a38f0db6b41d
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Chris@537 1 /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */
Chris@537 2
Chris@537 3 /*
Chris@537 4 Sonic Visualiser
Chris@537 5 An audio file viewer and annotation editor.
Chris@537 6 Centre for Digital Music, Queen Mary, University of London.
Chris@537 7 This file copyright 2006-2009 Chris Cannam and QMUL.
Chris@537 8
Chris@537 9 This program is free software; you can redistribute it and/or
Chris@537 10 modify it under the terms of the GNU General Public License as
Chris@537 11 published by the Free Software Foundation; either version 2 of the
Chris@537 12 License, or (at your option) any later version. See the file
Chris@537 13 COPYING included with this distribution for more information.
Chris@537 14 */
Chris@537 15
Chris@537 16 #ifndef _FFT_CACHE_WRITER_H_
Chris@537 17 #define _FFT_CACHE_WRITER_H_
Chris@537 18
Chris@537 19 #include <stddef.h>
Chris@537 20
Chris@537 21 class FFTCacheWriter
Chris@537 22 {
Chris@537 23 public:
Chris@537 24 virtual size_t getWidth() const = 0;
Chris@537 25 virtual size_t getHeight() const = 0;
Chris@537 26
Chris@537 27 virtual void setColumnAt(size_t x, float *mags, float *phases, float factor) = 0;
Chris@537 28 virtual void setColumnAt(size_t x, float *reals, float *imags) = 0;
Chris@537 29
Chris@537 30 virtual void allColumnsWritten() = 0;
Chris@537 31
Chris@537 32 virtual FFTCache::StorageType getStorageType() const = 0;
Chris@537 33 };
Chris@537 34
Chris@537 35 #endif
Chris@537 36