Chris@107: /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
Chris@107: 
Chris@107: /*
Chris@107:     Sonic Annotator
Chris@107:     A utility for batch feature extraction from audio files.
Chris@107:     Mark Levy, Chris Sutton and Chris Cannam, Queen Mary, University of London.
Chris@107:     Copyright 2007-2014 QMUL.
Chris@107: 
Chris@107:     This program is free software; you can redistribute it and/or
Chris@107:     modify it under the terms of the GNU General Public License as
Chris@107:     published by the Free Software Foundation; either version 2 of the
Chris@107:     License, or (at your option) any later version.  See the file
Chris@107:     COPYING included with this distribution for more information.
Chris@107: */
Chris@107: 
Chris@107: #include "MultiplexedReader.h"
Chris@107: 
Chris@107: MultiplexedReader::MultiplexedReader(QList<AudioFileReader *> readers) : 
Chris@107:     m_readers(readers)
Chris@107: {
Chris@107:     m_channelCount = readers.size();
Chris@107:     m_sampleRate = readers[0]->getSampleRate();
Chris@107:     
Chris@107:     m_frameCount = 0;
Chris@107:     m_quicklySeekable = true;
Chris@107:     
Chris@107:     foreach (AudioFileReader *r, m_readers) {
Chris@107: 	if (!r->isOK()) {
Chris@107: 	    m_channelCount = 0;
Chris@107: 	    m_error = r->getError();
Chris@107: 	} else {
Chris@107: 	    if (r->getFrameCount() > m_frameCount) {
Chris@107: 		m_frameCount = r->getFrameCount();
Chris@107: 	    }
Chris@107: 	    if (!r->isQuicklySeekable()) {
Chris@107: 		m_quicklySeekable = false;
Chris@107: 	    }
Chris@107: 	}
Chris@107:     }
Chris@107: }
Chris@107: 
Chris@107: MultiplexedReader::~MultiplexedReader()
Chris@107: {
Chris@107:     foreach (AudioFileReader *r, m_readers) {
Chris@107: 	delete r;
Chris@107:     }
Chris@107: }
Chris@107: 
Chris@107: void
Chris@107: MultiplexedReader::getInterleavedFrames(int start, int count,
Chris@107: 					SampleBlock &frames) const
Chris@107: {
Chris@107:     int nr = m_readers.size();
Chris@107: 
Chris@107:     frames = SampleBlock(count * nr);
Chris@107: 
Chris@107:     for (int ri = 0; ri < nr; ++ri) {
Chris@107: 
Chris@107: 	AudioFileReader *reader = m_readers[ri];
Chris@107: 	SampleBlock rs(count * reader->getChannelCount());
Chris@107: 
Chris@107: 	reader->getInterleavedFrames(start, count, rs);
Chris@107: 
Chris@107: 	int nc = reader->getChannelCount();
Chris@107: 	for (int i = 0; i < count; ++i) {
Chris@107: 	    for (int c = 0; c < nc; ++c) {
Chris@107: 		frames[i * nr + ri] += rs[i * nc + c];
Chris@107: 	    }
Chris@107: 	}
Chris@107:     }
Chris@107: }
Chris@107: 
Chris@107: int
Chris@107: MultiplexedReader::getDecodeCompletion() const
Chris@107: {
Chris@107:     int completion = 100;
Chris@107:     foreach (AudioFileReader *r, m_readers) {
Chris@107: 	int c = r->getDecodeCompletion();
Chris@107: 	if (c < 100) {
Chris@107: 	    completion = c;
Chris@107: 	}
Chris@107:     }
Chris@107:     return completion;
Chris@107: }
Chris@107: 
Chris@107: bool
Chris@107: MultiplexedReader::isUpdating() const
Chris@107: {
Chris@107:     foreach (AudioFileReader *r, m_readers) {
Chris@107: 	if (r->isUpdating()) return true;
Chris@107:     }
Chris@107:     return false;
Chris@107: }
Chris@107: 
Chris@107: 
Chris@107: