diff runner/MultiplexedReader.cpp @ 107:7b60603966cf multiplex

Implementation of MultiplexedReader -- now builds, not yet tested

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/runner/MultiplexedReader.cpp	Thu Oct 02 08:16:42 2014 +0100
@@ -0,0 +1,96 @@
+/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
+
+/*
+    Sonic Annotator
+    A utility for batch feature extraction from audio files.
+    Mark Levy, Chris Sutton and Chris Cannam, Queen Mary, University of London.
+    Copyright 2007-2014 QMUL.
+
+    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 "MultiplexedReader.h"
+
+MultiplexedReader::MultiplexedReader(QList<AudioFileReader *> readers) : 
+    m_readers(readers)
+{
+    m_channelCount = readers.size();
+    m_sampleRate = readers[0]->getSampleRate();
+    
+    m_frameCount = 0;
+    m_quicklySeekable = true;
+    
+    foreach (AudioFileReader *r, m_readers) {
+	if (!r->isOK()) {
+	    m_channelCount = 0;
+	    m_error = r->getError();
+	} else {
+	    if (r->getFrameCount() > m_frameCount) {
+		m_frameCount = r->getFrameCount();
+	    }
+	    if (!r->isQuicklySeekable()) {
+		m_quicklySeekable = false;
+	    }
+	}
+    }
+}
+
+MultiplexedReader::~MultiplexedReader()
+{
+    foreach (AudioFileReader *r, m_readers) {
+	delete r;
+    }
+}
+
+void
+MultiplexedReader::getInterleavedFrames(int start, int count,
+					SampleBlock &frames) const
+{
+    int nr = m_readers.size();
+
+    frames = SampleBlock(count * nr);
+
+    for (int ri = 0; ri < nr; ++ri) {
+
+	AudioFileReader *reader = m_readers[ri];
+	SampleBlock rs(count * reader->getChannelCount());
+
+	reader->getInterleavedFrames(start, count, rs);
+
+	int nc = reader->getChannelCount();
+	for (int i = 0; i < count; ++i) {
+	    for (int c = 0; c < nc; ++c) {
+		frames[i * nr + ri] += rs[i * nc + c];
+	    }
+	}
+    }
+}
+
+int
+MultiplexedReader::getDecodeCompletion() const
+{
+    int completion = 100;
+    foreach (AudioFileReader *r, m_readers) {
+	int c = r->getDecodeCompletion();
+	if (c < 100) {
+	    completion = c;
+	}
+    }
+    return completion;
+}
+
+bool
+MultiplexedReader::isUpdating() const
+{
+    foreach (AudioFileReader *r, m_readers) {
+	if (r->isUpdating()) return true;
+    }
+    return false;
+}
+
+
+