view data/fileio/AudioFileReader.cpp @ 1078:ce82bcdc95d0

Fail upfront if the file is going to be too large. We expect the caller to split up large data sets into several MatrixFiles
author Chris Cannam
date Wed, 10 Jun 2015 13:10:26 +0100
parents 843f67be0ed9
children 4d9816ba0ebe
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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"

using std::vector;

vector<SampleBlock>
AudioFileReader::getDeInterleavedFrames(sv_frame_t start, sv_frame_t count) const
{
    SampleBlock interleaved = getInterleavedFrames(start, count);
    
    int channels = getChannelCount();
    sv_frame_t rc = interleaved.size() / channels;

    vector<SampleBlock> frames(channels, SampleBlock(rc, 0.f));
    
    for (int c = 0; c < channels; ++c) {
        for (sv_frame_t i = 0; i < rc; ++i) {
            frames[c][i] = interleaved[i * channels + c];
        }
    }

    return frames;
}