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#include "utils.h"
#include "audiographer/sr_converter.h"
using namespace AudioGrapher;
class SampleRateConverterTest : public CppUnit::TestFixture
{
CPPUNIT_TEST_SUITE (SampleRateConverterTest);
CPPUNIT_TEST (testNoConversion);
CPPUNIT_TEST (testUpsampleLength);
CPPUNIT_TEST (testDownsampleLength);
CPPUNIT_TEST_SUITE_END ();
public:
void setUp()
{
frames = 128;
random_data = TestUtils::init_random_data(frames);
sink.reset (new AppendingVectorSink<float>());
converter.reset (new SampleRateConverter (1));
}
void tearDown()
{
delete [] random_data;
}
void testNoConversion()
{
assert (frames % 2 == 0);
nframes_t const half_frames = frames / 2;
nframes_t frames_output = 0;
converter->init (44100, 44100);
converter->add_output (sink);
ProcessContext<float> c (random_data, half_frames, 1);
converter->process (c);
ProcessContext<float> c2 (&random_data[half_frames], half_frames, 1);
c2.set_flag (ProcessContext<float>::EndOfInput);
converter->process (c2);
frames_output = sink->get_data().size();
CPPUNIT_ASSERT_EQUAL (frames, frames_output);
CPPUNIT_ASSERT (TestUtils::array_equals (random_data, sink->get_array(), frames));
}
void testUpsampleLength()
{
assert (frames % 2 == 0);
nframes_t const half_frames = frames / 2;
nframes_t frames_output = 0;
converter->init (44100, 88200);
converter->allocate_buffers (half_frames);
converter->add_output (sink);
ProcessContext<float> c (random_data, half_frames, 1);
converter->process (c);
ProcessContext<float> c2 (&random_data[half_frames], half_frames, 1);
c2.set_flag (ProcessContext<float>::EndOfInput);
converter->process (c2);
frames_output = sink->get_data().size();
nframes_t tolerance = 3;
CPPUNIT_ASSERT (2 * frames - tolerance < frames_output && frames_output < 2 * frames + tolerance);
}
void testDownsampleLength()
{
assert (frames % 2 == 0);
nframes_t const half_frames = frames / 2;
nframes_t frames_output = 0;
converter->init (88200, 44100);
converter->allocate_buffers (half_frames);
converter->add_output (sink);
ProcessContext<float> c (random_data, half_frames, 1);
converter->process (c);
ProcessContext<float> c2 (&random_data[half_frames], half_frames, 1);
c2.set_flag (ProcessContext<float>::EndOfInput);
converter->process (c2);
frames_output = sink->get_data().size();
nframes_t tolerance = 3;
CPPUNIT_ASSERT (half_frames - tolerance < frames_output && frames_output < half_frames + tolerance);
}
private:
boost::shared_ptr<SampleRateConverter > converter;
boost::shared_ptr<AppendingVectorSink<float> > sink;
float * random_data;
nframes_t frames;
};
CPPUNIT_TEST_SUITE_REGISTRATION (SampleRateConverterTest);
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