view data/fileio/AudioFileReader.cpp @ 458:f60360209e5c

* Fix race condition in FFTFileCache when reading from the same FFT model from multiple threads (e.g. when applying more than one plugin at once)
author Chris Cannam
date Wed, 15 Oct 2008 12:08:02 +0000
parents 1d656dcda8ef
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 "AudioFileReader.h"

void
AudioFileReader::getDeInterleavedFrames(size_t start, size_t count,
                                        std::vector<SampleBlock> &frames) const
{
    SampleBlock interleaved;
    getInterleavedFrames(start, count, interleaved);
    
    size_t channels = getChannelCount();
    size_t rc = interleaved.size() / channels;

    frames.clear();

    for (size_t c = 0; c < channels; ++c) {
        frames.push_back(SampleBlock());
    }

    for (size_t i = 0; i < rc; ++i) {
        for (size_t c = 0; c < channels; ++c) {
            frames[c].push_back(interleaved[i * channels + c]);
        }
    }
}