diff data/fileio/test/AudioFileReaderTest.h @ 756:02390a4c2abe

Toward audio read tests

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/data/fileio/test/AudioFileReaderTest.h	Fri Mar 08 16:14:21 2013 +0000
@@ -0,0 +1,119 @@
+/* -*- 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 2013 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.
+*/
+
+#ifndef TEST_AUDIO_FILE_READER_H
+#define TEST_AUDIO_FILE_READER_H
+
+#include "../AudioFileReaderFactory.h"
+#include "../AudioFileReader.h"
+
+#include "AudioTestData.h"
+
+#include <cmath>
+
+#include <QObject>
+#include <QtTest>
+#include <QDir>
+
+#include <iostream>
+
+using namespace std;
+
+static QString audioDir = "testfiles";
+
+class AudioFileReaderTest : public QObject
+{
+    Q_OBJECT
+
+    const char *strOf(QString s) {
+        return strdup(s.toLocal8Bit().data());
+    }
+
+private slots:
+    void init()
+    {
+        if (!QDir(audioDir).exists()) {
+            cerr << "ERROR: Audio test file directory \"" << audioDir << "\" does not exist" << endl;
+            QVERIFY2(QDir(audioDir).exists(), "Audio test file directory not found");
+        }
+    }
+
+    void read_data()
+    {
+        QTest::addColumn<QString>("audiofile");
+        QStringList files = QDir(audioDir).entryList(QDir::Files);
+        foreach (QString filename, files) {
+            QTest::newRow(strOf(filename)) << filename;
+        }
+    }
+
+    void read()
+    {
+        QFETCH(QString, audiofile);
+
+	AudioFileReader *reader =
+	    AudioFileReaderFactory::createReader
+	    (audioDir + "/" + audiofile, 48000);
+
+	if (!reader) {
+	    QSKIP(strOf(QString("File format for \"%1\" not supported, skipping").arg(audiofile)), SkipSingle);
+	}
+
+	int channels = reader->getChannelCount();
+	AudioTestData tdata(48000, channels);
+	
+	float *reference = tdata.getInterleavedData();
+	int refsize = tdata.getFrameCount() * channels;
+	
+	vector<float> test;
+	
+	// The reader should give us exactly the expected number of
+	// frames -- so we ask for one more, just to check we don't
+	// get it!
+	reader->getInterleavedFrames
+	    (0, tdata.getFrameCount() + 1, test);
+	int read = test.size() / channels;
+     
+	// need to resolve questions about frame count at end of
+	// resampled file before we can do this
+//!!!	QCOMPARE(read, tdata.getFrameCount());
+
+	float limit = 0.011;
+
+	for (int c = 0; c < channels; ++c) {
+	    float maxdiff = 0.f;
+	    int maxAt = 0;
+	    float totdiff = 0.f;
+	    for (int i = 0; i < read; ++i) {
+		float diff = fabsf(test[i * channels + c] -
+				   reference[i * channels + c]);
+		totdiff += diff;
+		if (diff > maxdiff) {
+		    maxdiff = diff;
+		    maxAt = i;
+		}
+	    }
+	    float meandiff = totdiff / read;
+//	    cerr << "meandiff on channel " << c << ": " << meandiff << endl;
+//	    cerr << "maxdiff on channel " << c << ": " << maxdiff << " at " << maxAt << endl;
+	    if (maxdiff >= limit) {
+		cerr << "ERROR: for audiofile " << audiofile << ": maxdiff = " << maxdiff << " at frame " << maxAt << " of " << read << " on channel " << c << " (mean diff = " << meandiff << ")" << endl;
+		QVERIFY(maxdiff < limit);
+	    }
+	}
+    }
+};
+
+#endif