Add resampler unit tests.

2 files changed, 114 insertions, 1 deletions

diff --git a/test/Makefile.am b/test/Makefile.am
index 136ba28..e43a6ba 100644
--- a/test/Makefile.am
+++ b/test/Makefile.am
@@ -23,7 +23,8 @@ gui_SOURCES = \
 	gui.cc
 
 resampler_CXXFLAGS = -DOUTPUT=\"resampler\" $(CPPUNIT_CFLAGS) \
-	$(ZITA_CXXFLAGS) $(SAMPLERATE_CFLAGS)
+	$(ZITA_CXXFLAGS) $(SAMPLERATE_CFLAGS) \
+	-I$(top_srcdir)/hugin -DDISABLE_HUGIN
 resampler_LDFLAGS = $(ZITA_LIBS) $(SAMPLERATE_LIBS) $(CPPUNIT_LIBS)
 resampler_SOURCES = \
 	$(top_srcdir)/src/chresampler.cc \
diff --git a/test/resampler.cc b/test/resampler.cc
new file mode 100644
index 0000000..445a5b3
--- /dev/null
+++ b/test/resampler.cc
@@ -0,0 +1,112 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/***************************************************************************
+ *            resampler.cc
+ *
+ *  Sun Oct  5 20:16:22 CEST 2014
+ *  Copyright 2014 Bent Bisballe Nyeng
+ *  deva@aasimon.org
+ ****************************************************************************/
+
+/*
+ *  This file is part of DrumGizmo.
+ *
+ *  DrumGizmo 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.
+ *
+ *  DrumGizmo is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with DrumGizmo; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA.
+ */
+#include <cppunit/extensions/HelperMacros.h>
+
+#include "../src/chresampler.h"
+#include <unistd.h>
+
+#define BUFSZ 500
+
+static float round(float a) { return a<0.5?0:1; }
+
+class test_resampler : public CppUnit::TestFixture
+{
+  CPPUNIT_TEST_SUITE(test_resampler);
+	CPPUNIT_TEST(resampling);
+	CPPUNIT_TEST(resampling_buffer_sizes);
+	CPPUNIT_TEST_SUITE_END();
+
+public:
+	void setUp() {}
+	void tearDown() {}
+
+  void resampling()
+  {
+    CHResampler r;
+    CPPUNIT_ASSERT_EQUAL(1.0, r.ratio());
+    
+    r.setup(44100, 48000);
+    CPPUNIT_ASSERT_EQUAL(44100.0/48000.0, r.ratio());
+
+    float in[BUFSZ];
+    for(int i = 0; i < BUFSZ; i++) in[i] = 0;//(float)i/(float)BUFSZ;
+    in[100] = 1.0;
+
+    float out[BUFSZ];
+    r.setInputSamples(in, sizeof(in) / sizeof(float));
+    r.setOutputSamples(out, sizeof(out) / sizeof(float));
+    r.process();
+    CPPUNIT_ASSERT_EQUAL((size_t)0, r.getInputSampleCount());
+
+    //    CPPUNIT_ASSERT_EQUAL(, r.getOutputSampleCount());
+
+    int outidx = -1;
+    int inidx = -1;
+    for(int i = 0; i < BUFSZ - (int)r.getOutputSampleCount(); i++) {
+      if(in[i] == 1.0) inidx = i;
+      if(round(out[i]) == 1.0) outidx = i;
+      //printf("in[% 4d]\t= %f\t", i, in[i]);
+      //printf("out[% 4d]\t= %f\n", i, out[i]);
+    }
+
+    CPPUNIT_ASSERT(inidx != -1);
+    CPPUNIT_ASSERT(outidx != -1);
+
+    //printf("inidx: %d - outidx: %d\n", inidx, outidx);
+    //CPPUNIT_ASSERT_EQUAL(71, inidx - outidx); // This does not make sense...
+	}
+
+  void resampling_buffer_sizes()
+  {
+    CHResampler r;
+    CPPUNIT_ASSERT_EQUAL(1.0, r.ratio());
+    
+    double infs = 24000;
+    double outfs = 48000;
+    r.setup(infs, outfs);
+    CPPUNIT_ASSERT_EQUAL(infs / outfs, r.ratio());
+
+    float in[BUFSZ];
+    float out[(int)(BUFSZ / r.ratio())];
+
+    // Preload resampler
+    r.setOutputSamples(out, 1);
+    while(r.getOutputSampleCount()) {
+      r.setInputSamples(in, 1);
+      r.process();
+    }
+
+    r.setInputSamples(in, sizeof(in) / sizeof(float));
+    r.setOutputSamples(out, sizeof(out) / sizeof(float));
+    r.process();
+    CPPUNIT_ASSERT_EQUAL((size_t)0, r.getInputSampleCount());
+    CPPUNIT_ASSERT_EQUAL((size_t)0, r.getOutputSampleCount());
+  }
+};
+
+// Registers the fixture into the 'registry'
+CPPUNIT_TEST_SUITE_REGISTRATION(test_resampler);