133 lines
3.8 KiB
C++
133 lines
3.8 KiB
C++
#include <cassert>
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#include "tests/utils.h"
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#include "audiographer/general/sr_converter.h"
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using namespace AudioGrapher;
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class SampleRateConverterTest : public CppUnit::TestFixture
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{
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CPPUNIT_TEST_SUITE (SampleRateConverterTest);
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CPPUNIT_TEST (testNoConversion);
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CPPUNIT_TEST (testUpsampleLength);
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CPPUNIT_TEST (testDownsampleLength);
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CPPUNIT_TEST (testRespectsEndOfInput);
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CPPUNIT_TEST_SUITE_END ();
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public:
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void setUp()
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{
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samples = 128;
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random_data = TestUtils::init_random_data(samples);
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sink.reset (new AppendingVectorSink<float>());
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grabber.reset (new ProcessContextGrabber<float>());
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converter.reset (new SampleRateConverter (1));
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}
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void tearDown()
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{
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delete [] random_data;
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}
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void testNoConversion()
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{
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assert (samples % 2 == 0);
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samplecnt_t const half_samples = samples / 2;
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samplecnt_t samples_output = 0;
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converter->init (44100, 44100);
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converter->add_output (sink);
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ProcessContext<float> c (random_data, half_samples, 1);
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converter->process (c);
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ProcessContext<float> c2 (&random_data[half_samples], half_samples, 1);
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c2.set_flag (ProcessContext<float>::EndOfInput);
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converter->process (c2);
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samples_output = sink->get_data().size();
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CPPUNIT_ASSERT_EQUAL (samples, samples_output);
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CPPUNIT_ASSERT (TestUtils::array_equals (random_data, sink->get_array(), samples));
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}
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void testUpsampleLength()
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{
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assert (samples % 2 == 0);
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samplecnt_t const half_samples = samples / 2;
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samplecnt_t samples_output = 0;
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converter->init (44100, 88200);
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converter->allocate_buffers (half_samples);
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converter->add_output (sink);
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ProcessContext<float> c (random_data, half_samples, 1);
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converter->process (c);
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ProcessContext<float> c2 (&random_data[half_samples], half_samples, 1);
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c2.set_flag (ProcessContext<float>::EndOfInput);
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converter->process (c2);
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samples_output = sink->get_data().size();
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samplecnt_t tolerance = 3;
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CPPUNIT_ASSERT (2 * samples - tolerance < samples_output && samples_output < 2 * samples + tolerance);
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}
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void testDownsampleLength()
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{
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assert (samples % 2 == 0);
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samplecnt_t const half_samples = samples / 2;
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samplecnt_t samples_output = 0;
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converter->init (88200, 44100);
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converter->allocate_buffers (half_samples);
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converter->add_output (sink);
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ProcessContext<float> c (random_data, half_samples, 1);
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converter->process (c);
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ProcessContext<float> c2 (&random_data[half_samples], half_samples, 1);
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c2.set_flag (ProcessContext<float>::EndOfInput);
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converter->process (c2);
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samples_output = sink->get_data().size();
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samplecnt_t tolerance = 3;
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CPPUNIT_ASSERT (half_samples - tolerance < samples_output && samples_output < half_samples + tolerance);
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}
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void testRespectsEndOfInput()
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{
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assert (samples % 2 == 0);
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samplecnt_t const half_samples = samples / 2;
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converter->init (44100, 48000);
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converter->allocate_buffers (half_samples);
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converter->add_output (grabber);
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ProcessContext<float> c (random_data, half_samples, 1);
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converter->process (c);
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ProcessContext<float> c2 (&random_data[half_samples], half_samples / 2, 1);
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c2.set_flag (ProcessContext<float>::EndOfInput);
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converter->process (c2);
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for (std::list<ProcessContext<float> >::iterator it = grabber->contexts.begin(); it != grabber->contexts.end(); ++it) {
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std::list<ProcessContext<float> >::iterator next = it; ++next;
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if (next == grabber->contexts.end()) {
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CPPUNIT_ASSERT (it->has_flag (ProcessContext<float>::EndOfInput));
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} else {
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CPPUNIT_ASSERT (!it->has_flag (ProcessContext<float>::EndOfInput));
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}
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}
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}
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private:
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std::shared_ptr<SampleRateConverter > converter;
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std::shared_ptr<AppendingVectorSink<float> > sink;
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std::shared_ptr<ProcessContextGrabber<float> > grabber;
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float * random_data;
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samplecnt_t samples;
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};
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CPPUNIT_TEST_SUITE_REGISTRATION (SampleRateConverterTest);
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